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数据库选择题答案1. A relational database management system (RDBMS) is a system that manages relational databases and allows users to interact with data stored in these databases. It provides a structured way to organize and manage data, making it easier to query, update, and analyze.2. Structured Query Language (SQL) is a programming language used to manage and manipulate data in a relational database. It provides a standardized way to retrieve, insert, update, and delete data from databases.3. The main components of a relational database system include:- Database: A collection of related data organized and stored in a structured format.- Tables: A database consists of one or more tables, which hold the data.- Rows: Each row in a table represents a record or instance of data.- Columns: Each column in a table represents a specific attribute or field of the data.- Primary key: A primary key is a unique identifier for each record in a table.- Foreign key: A foreign key is a reference to a primary key in another table, establishing a relationship between the two tables.4. The advantages of using a relational database management system are:- Data integrity: RDBMS ensures data integrity by enforcing constraints and rules on data manipulation.- Data consistency: RDBMS maintains a consistent view of data across the database, ensuring that changes are propagated correctly.- Data security: RDBMS provides features like access control and encryption to protect data from unauthorized access.- Scalability: RDBMS allows for the efficient management of large amounts of data and can scale to accommodate growing needs.- Query flexibility: SQL provides a powerful and flexible way to query and retrieve data from databases.- Data independence: RDBMS separates the physical and logical representation of data, allowing for easier management and modifications.5. When choosing a database system, several factors need to be considered:- Data requirements: Assess the type of data, volume, and complexity to determine the most suitable database system.- Performance: Consider the expected workload and performance requirements to select a database system that can handle the anticipated load.- Scalability: Determine if the database system can scale to accommodate future growth in data volume and user concurrency.- Availability: Evaluate the high availability features andbackup/recovery mechanisms provided by the database system.- Cost: Consider the licensing fees, hardware requirements, and maintenance costs associated with the database system.- Vendor support: Look for a reputable vendor that offers reliable technical support and regular updates for the database system.- Integration capabilities: Assess the compatibility and integration options with other systems and applications in the environment.6. The popular relational database management systems include:- Oracle Database: A widely used RDBMS known for its scalability, reliability, and advanced features.- MySQL: An open-source RDBMS suitable for small to medium-sized applications.- Microsoft SQL Server: A commercial RDBMS with excellent integration capabilities and comprehensive tooling.- PostgreSQL: An open-source RDBMS known for its robustness, extensibility, and support for advanced SQL features.7. Non-relational databases, also known as NoSQL databases, are an alternative to traditional relational databases. They are designed to handle large-scale data storage and processing requirements. Some popular types of NoSQL databases include:- Key-value stores: These databases store data in a key-value format for fast retrieval.- Document databases: These databases store and retrieve data in JSON-like documents.- Wide-column stores: These databases store data in tables with columns that can vary per row or record.- Graph databases: These databases are optimized for managing relationships between data elements.In conclusion, a relational database management system (RDBMS) is a powerful tool for organizing and managing data. When choosing a database system, it is important to consider factors such as data requirements, performance, scalability, availability, cost, vendor support, and integration capabilities. Popular RDBMS options include Oracle Database, MySQL, Microsoft SQL Server, and PostgreSQL. Additionally, NoSQL databases provide alternative solutions for specific data storage and processing needs.。
【CUUG 内部资料】OCP-12C-1Z0-062题库解析-第3次课序：2018年的时候，OCP 11g 考试题库大更新，052 053出现了很多新题，2019年，11g 即将停考的前期，Oracle 又出现了一次大变动，12c 出现了很多新题，比如062 063题库大更新QUESTION 31Which two are true concerning a multitenant container database with three pluggable database? A. All administration tasks must be done to a specific pluggable database. B. The pluggable databases increase patching time. C. The pluggable databases reduce administration effort. D. The pluggable databases are patched together . E. Pluggable databases are only used for database consolidation. Correct Answer: CEQUESTION 32Examine the current value for the following parameters in your database instance:SGA_MAX_SIZE = 1024M SGA_TARGET = 700M DB_8K_CACHE_SIZE = 124M LOG_BUFFER = 200M You issue the following command to increase the value of DB_8K_CACHE_SIZE:SQL> ALTER SYSTEM SET DB_8K_CACHE_SIZE=140M; Which statement is true? A. It fails because the DB_8K_CACHE_SIZE parameter cannot be changed dynamically. B. It succeeds only if memory is available from the autotuned components if SGA. C. It fails because an increase in DB_8K_CACHE_SIZE cannot be accommodated within SGA_TARGET .D. It fails because an increase in DB_8K_CACHE_SIZE cannot be accommodated withinSGA_MAX_SIZE. Correct Answer: B QUESTION 33Which three statements are true concerning unplugging a pluggable database (PDB)? A. The PDB must be open in read only mode. B. The PDB must be closed.C. The unplugged PDB becomes a non-CDB.D. The unplugged PDB can be plugged into the same multitenant container database (CDB)E. The unplugged PDB can be plugged into another CDB.F. The PDB data files are automatically removed from disk. Correct Answer: BDEC U U G C U U G C U U G 内部考试资料 内部考试资料 O C P 讨论群：1015267481C U U G C U U G C U U G 内部考试资料 内部考试资料 严禁外传O C P 讨论群：1015267481QUESTION 34Examine the following command:CREATE TABLE (prod_id number(4),Prod_name varchar2 (20), Category_id number(30), Quantity_on_hand number (3) INVISIBLE); Which three statements are true about using an invisible column in t he PRODUCTS table?A. The %ROWTYPE attribute declarations in PL/SQL to access a row will not display the invisible column in the output.B. The DESCRIBE commands in SQL *Plus will not display the invisible column in t he output.C. Referential integrity constraint cannot be set on t he invisible column.D. The invisible column cannot be made visible and can only be marked as unused.E. A primary key constraint can be added on t he invisible column. Correct Answer: ABE (解析：一般来说,看不见列帮助迁移和发展在线应用程序。
人工智能原理_北京大学中国大学mooc课后章节答案期末考试题库2023年1.Turing Test is designed to provide what kind of satisfactory operationaldefinition?图灵测试旨在给予哪一种令人满意的操作定义？答案:machine intelligence 机器智能2.Thinking the differences between agent functions and agent programs, selectcorrect statements from following ones.考虑智能体函数与智能体程序的差异，从下列陈述中选择正确的答案。
答案:An agent program implements an agent function.一个智能体程序实现一个智能体函数。
3.There are two main kinds of formulation for 8-queens problem. Which of thefollowing one is the formulation that starts with all 8 queens on the boardand moves them around?有两种8皇后问题的形式化方式。
“初始时8个皇后都放在棋盘上，然后再进行移动”属于哪一种形式化方式？答案:Complete-state formulation 全态形式化4.What kind of knowledge will be used to describe how a problem is solved?哪种知识可用于描述如何求解问题？答案:Procedural knowledge 过程性知识5.Which of the following is used to discover general facts from trainingexamples?下列中哪个用于训练样本中发现一般的事实？答案:Inductive learning 归纳学习6.Which statement best describes the task of “classification” in machinelearning?哪一个是机器学习中“分类”任务的正确描述？答案:To assign a category to each item. 为每个项目分配一个类别。
Oracle_11G_题库337ORACLE试题QUESTION NO: 1Identify two situations in which you can use Data Recovery Advisor for recovery. (Choose two.) 确定哪两种情况下，你可以使用用于恢复的数据恢复顾问。
A. The user has dropped an important table that needs to be recovered.B. The database files are corrupted when the database is open. 打开数据库时，数据库文件损坏。
C. You are not able to start up the database instance because the required database files are missing. 你不能启动数据库实例，因为所需的数据库文件丢失。
D. The archived log files are missing for which backup is not available. Answer: B,CQUESTION NO: 2Examine the following values of the initialization parameters in the database having the SID ORCL: 检查以下在数据库中具有ORCL SID的初始化参数的值：BACKGROUND_DUMP_DEST=/u01/app/oracle/product/11.1.0/db_1/bdumpUSER_DUMP_DEST=/u01/app/oracle/product/11.1.0/db_1/udumpCORE_DUMP_DEST=/u01/app/oracle/product/11.1.0/db_1/cdump DIAGNOSTIC_DEST= The environment variables have the following value: ORACLE_BASE=/u01/app/oracle ORACLE_HOME=/u01/app/oracle/product/11.1.0/db_1What is the location of the Automatic Diagnostic Repository (ADR) home? 自动诊断信息库（ADR）之家在什么位置？A. /u01/app/oracle/product/11.1.0/db_1B. /u01/app/oracleC.$ORACLE_HOME/bdump D. $ORACLE_HOME/log Answer: BQUESTION NO: 3Observe the following PL/SQL block: BEGINdbms_spm.configure('SPACE_BUDGET_PERCENT', 30); END;Which statement is correct regarding the above PL/SQL block? 有关上述PL / SQL块哪种说法是正确的？ A. It automatically purges the SQL management objects when SMB occupies more than 30% of the SYSAUX tablespace.B. It reserves 30% of the space in the SYSAUX tablespace for SQL Management Base (SMB).C. It reserves 30% of the space in the SYSTEM tablespace for SMB.D. It generates a weekly warning in the alert log file when SMB occupies more than 30% of the SYSAUX tablespace. 当SQL管理库占了30％以上的系统辅助表空间时，它会在警报日志文件中产生一个每周预警。
武汉理工大学大数据库系统原理总复习题(完整版含问题详解)理工高校数据库系统原理总复习题（完整版含答案）1. Questions1.1What is the purpose of a database?ANSWER：The purpose of a database is to help people track of things.1.2What is the most commonly used type of database?ANSWER: the most commonly used type of database is the relational database.1.7 Define the terms data and information. Explain how the two terms differ.ANSWER: Data are recorded facts and numbers.we can now define information as:●Knowledge derived from data.●Data presented in a meaningful context.●Data processed by summing, ordering, averaging, grouping, comparing orother similar operations.1.10 What problem can occur when a database is processed by more than one user?ANSWER: When more than one user employs a database application, these is always the chance that one user's work may interfere with other's.1.12 What is the purpose of the largest databases ate-commerce companies such as Amazon.?ANSWER: The largest databases are those that track customer browser behavior.（用来记录取户的扫瞄行为的。
Multiple-Choice Quiz 11.An E-Commerce system consists of the following components. Which of these same components must be included in a database? (c)The data, such as information about the goods available for sale, customers, orders placed, shipping information, etc.A database must include a collection of programs that control the data, such as programs to create, maintain, and manipulate the data. These programs can be easily used to create, maintain, and manipulate data in other domains.A database must include a collection of programs that operate on the data, but are specific to the E-commerce system. These programs enable users to browse through the store-items, place orders, track shipping, etc.(a) I, II, and III(b) I and II only(c) I only(d) II only2.An E-Commerce database contains data about customers, products, orders, system response times, etc. Which of the following can be specified as integrity constraints in an E-Commerce database system? (d)No two products can have the same product ID.The DBMS response time for all Web requests should be at most 2 seconds.A customer order cannot have more than one shipping address.(a) I only(b) I, II, and III(c) I and II only(d) I and III onlyFeedback: The constraints I, II and III specify the application semantics of the data captured in the E-Commerce database. Constraint III, although it seems contrary to common sense, is not something that can be prohibited by the DBMS because the DBMS is general purpose. The response time of the DBMS cannot be enforced by the DBMS. It depends on factors such the processor speed, memory available, etc.3. An E-Commerce system consists of the following components. Which of these same components will constitute a database system? (d)The data, such as information about the goods available for sale, customers, orders placed, shipping information, etc.A collection of programs that control the data, such as programs to create, maintain, and manipulate the data constitutes a database system. These programs can be easily used to create, maintain, and manipulate data in other domains such as in a library information system.A collection of programs that operate on the data, but are specific to the E-commerce system, constitutes a database system. These programs enable users to browse through the store-items, place orders, track shipping, etc.(a) I and II only(b) II only(c) I only(d) I, II, and IIIFeedback: A database system includes the data, the DBMS, and the application-specific programs that operate on that data.5. In a database system, whose responsibility is it to provide data consistency? (d)(a) the database administrator's(b) the user's(c) the application programmer's(d) the DBMS's6. A database is needed for which of the following application scenarios? (b)A video store that needs to keep track of data about members, about videos carried by the store, about videos rented by members, as well as data concerning borrow-date, return-date, and payment information.In the human resources department of a company, information about employees, their titles, their salaries and sick days, and about vacation days taken by each employee.A computer-simulated video game which needs to calculate and display, the physical (x, y) location of each actor in the game, the speed with which they are moving at the current instant, the direction in which they are moving, the action they are performing, the angle at which the game-player is viewing the scene.(a) I and III only(b) I and II only(c) I, II, and III(d) I only7.The physical storage structure will be _____ to the application programmer in a database approach, and will be _____ to the application programmer in a file system approach. (b)(a) visible, visible(b) hidden, visible(c) visible, hidden(d) hidden, hiddenMultiple-Choice Quiz 21. The foreign key in a table T1 _____ the same _____ as the corresponding primary key in table T2. (d)must have, nameneed not have, namemust have, domain(a) I, II, and III(b) I and II(c) I and III(d) II and III2. The degree of a table is the number of _____ in the table. (c)(a) keys(b) rows(c) columns(d) foreign keys3. The arity of a table is the number of _____ in the table. (c)(a) rows(b) foreign keys(c) columns(d) keys4. The cardinality of a table is the number of _____ in the table. (b)(a) keys(b) rows(c) columns(d) foreign keys5. Which of the following SQL statements can be used to add a row to a table? (c)(a) CREA TE(b) ADD(c) INSERT(d) APPEND6. The SQL clause to perform a set UNION operation is (b)(a) UNITE(b) UNION(c) COMBINE(d) MELD7. The SQL clause to perform a set difference operation is (b)(a) OMIT(b) EXCEPT(c) REJECT(d) DIFFER8. DDL is used to (c)(a) add contents to tables.(b) define the structure of database applications.(c) specify the structure of a database.(d) access the contents of tables.9. A deletion operation will _____ if the deletion leads to the violation of a referential integrity constraint. (a)(a) fail(b) crash the system(c) succeed with warning(d) succeed without warning10. The term query by example refers to (b)(a) a query for SQL examples(b) a visual query language developed by IBM(c) example SQL queries provided by other users that can be modified to suit current needs(d) example SQL queries provided by the DBMS that users can modify to suit their current needs11. What information is necessary when specifying the structure of a table? (d)(a) the name of the table and the amount of storage space to be allocated to the table(b) the name of the table and the names of the table's attributes(c) the name of the table, the names of the table's attributes, the data types of the table's attributes, the formats of the table's attributes, and the maximum number of rows that the table can have (d) the name of the table, the names of the table's attributes, the data types of attributes, and the formats of attributes12. What can be specified in the selection condition of a SELECT statement? (a)(a) a Boolean operation(b) the conditions under which the statement should be executed(c) the time at which the selection should be performed(d) an arithmetic operation13. Which of the following SQL statements can be used to modify just one row (out of many rows) in a table? (c)(a) ALTER(b) MODIFY(c) UPDA TE(d) CHANGE14. A deletion operation will _____ if the deletion leads to the violation of a referential integrity constraint. (c)(a) succeed with warning(b) succeed without warning(c) fail(d) crash the system15. Which of the following SQL statements can be used to create a relational table? (b)(a) APPEND(b) CREA TE(c) ADD(d) INSERT16. With Query By Example, a user enters a query by (b)(a) typing a syntactically correct SQL query that uses column and table names similar to the correct column and table names in a database(b) filling in skeleton tables of the database with examples of what is to be retrieved(c) placing SQL keywords, such as select, under the column names they want to retrieve(d) writing an English description of the data that the user needs17. DML is used to (d)(a) manipulate the structure of database applications.(b) specify the structure of a database.(c) add and delete tables.(d) add/modify/delete data in the database.18. A join operation joins _____ tables into _____. (a)(a) two, one(b) three, two(c) four, two(d) three, one//union/intersect/except参加运算的关系必须相容（即含有相同的属性集）19. A difference operation can be applied to tables that (b)(a) have the same column names(b) are union compatible(c) are the same size(d) have the same name20. Which of the following SQL statements can be used to remove a row from a table? (c)(a) REMOVE(b) ERASE(c) DELETE(d) DESTROYMultiple-Choice Quiz 31. In SQL, one function of the AS operator is to (c)(a) control the order in which a query’s rows are sorted(b) define the domain of an attribute(c) customize the names of columns in a query’s result(d) limit the cardinality of a relation2. When removing a table from the schema, using the RESTRICT option would (a)(a) remove the table if there are no references to it(b) remove the table and all other tables that the specified table refers to(c) remove the table and all references to it(d) recursively remove the table and all other tables that the removed table refers to3. In SQL, a database can be destroyed by which of the following? (a)(a) the command DROP SCHEMA(b) the command DELETE DA TABASE(c) the command DESTROY DA TABASE(d) a series of DESTROY TABLE commands4. When a string whose length is strictly less than n is entered as the value of a field whose SQL data type is V ARCHAR(n), the system responds by (b)(a) re-prompting for the entry of a string whose length is exactly n.(b) storing the string as is.(c) padding the end of the string with NULL characters to length n before storing it.(d) padding the end of the string with spaces to length n before storing it.5. In SQL, when destroying a database, the RESTRICT option removes (b)(a) everything in the specified database: the data, schema, etc.(b) the schema if the database has no data (empty tables)(c) the data and schema from the specified database, but not from related databases(d) the data but not the schema6. In SQL, a database can be created by which of the following? (d)(a) a series of CREA TE TABLE commands(b) the command ADD DA TABASE(c) the command INSERT DA TABASE(d) the command CREA TE SCHEMA7. In a FROM clause of a SELECT statement in SQL, a table can be aliased with which of the following operators? (b)(a) ALIAS(b) AS(c) RENAME(d) @8. In SQL, which of the following clauses can be used to sort results in ascending or descending order of attribute values? (c)(a) SORT(b) GROUP BY(c) ORDER BY(d) ARRANGE BY9. When specifying a selection criterion in SQL, attributes can be renamed with which of thefollowing operators? (d)(a) ALIAS(b) @(c) RENAME(d) AS10. In SQL, which of the following operators can be used to express searches that test for a range in a selection condition? (a)(a) BETWEEN(b) RANGE(c) START and END(d) FROM and TOMultiple-Choice Quiz 41. Which of the following is true about updateability of views? (a)(a) A view is updateable if it involves one table and contains a key.(b) A view is updateable if it involves multiple tables and no keys.(c) A view is updateable if it involves one table and does not contain a key.(d) A view is not updateable under any circumstance.2. A vertical view allows users access to (d)(a) only the system tables(b) only specific rows of the defining tables(c) only the user tables(d) only specific columns of the defining tables3. A horizontal view allows users access to (a)(a) only specific rows of the defining tables(b) only specific columns of the defining tables(c) only the system tables(d) only the base tables4. Consider two tables, Employee(EmpNo, Name, DeptNo) and Department(DeptNo, Name, Manager) with primary keys being EmpNo and DeptNo respectively. The DeptNo attribute of the Employee table has a NOT NULL constraint and is a foreign key that references the DeptNo attribute of the Department table. The Manager attribute of the Department table has a NOT NULL constraint and is a foreign key that references the EmpNo attribute of the Employee table. When the tables are empty, the only way to insert rows into the two tables is (d)(a) to use a transaction in NOT DEFERRABLE mode(b) to use a transaction either in DEFERRABLE mode or in NOT DEFERRABLE mode(c) not to use a transaction at all(d) to use a transaction in DEFERRABLE mode5. The SQL keyword _____ makes the modifications of the transaction permanent, while the SQL keyword _____ discards the modifications of the transaction. (b)(a) WRITE, ABORT(b) COMMIT, ROLLBACK(c) UPDA TE, SELECT(d) SA VE, CANCEL6. Which of the following commands can be used to give access permissions to a table? (a)(a) GRANT(b) AUTHORIZE(c) PERMIT(d) ALLOW7.Who can always give access permissions to a table? (b)(a) only the super-user(b) the owner of the table(c) the user of the table(d) only the database administrator (DBA)8. Which of the following commands can be used to remove access privileges associated with a table? (a)(a) REVOKE(b) DENY(c) RETRACT(d) REMOVE9. When is embedded SQL referred to as static SQL? (d)(a) when the SQL statements can never be changed(b) when the embedded SQL operates on the static part of the database(c) when the embedded SQL always returns the same set of results(d) when the embedded SQL is translated into DBMS calls at compile-time10. When is embedded SQL referred to as dynamic SQL? (a)(a) when the embedded SQL is translated into DBMS calls at run-time(b) when the embedded SQL operates on the dynamic part of the database(c) when the embedded SQL always returns different sets of results(d) when the SQL statements are changed in every run11. Which of the following is true about views being up to date? (a)(a) V iews are always up to date.(b) V iews can be automatically made up to date periodically by the system.(c) V iews are never up to date; there is always a lag time.(d) V iews are up to date only after the synchronization operation by the user.12. Which of the following referentially triggered actions are supported in SQL when a referential integrity constraint is violated? (a)SET NULLREJECTCASCADESET DEFAULT(a) I, III, and IV only(b) II and III only(c) I and IV only(d) I, II, and III only13. Which of the following is true about updateability of views? (c)(a) A view is not updateable if it involves one table and contains a key.(b) A view is updateable under all circumstances.(c) A view is not updateable if it involves aggregate functions and nested queries.(d) A view is not updateable under any circumstance.Multiple-Choice Quiz 51. In an ER model, what is a recursive relationship type? (d)(a) The type of relationship that does not belong anywhere(b) A never-ending type of relationship(c) The relationship type where the related entities are one and the same(d) The type of relationship between entities of one entity type2. In an ER model, the cardinality ratio of a relationship type is (b)(a) the number of instances of relationships of that relationship type(b) the number of relationships of that relationship type in which an entity can participate(c) the minimum number of entities that can participate in that relationship type(d) the number of entity types involved in that relationship type3. Which of the following is true about storage for derived attributes? (b)(a) Derived attributes must not be stored.(b) Derived attributes are usually not stored because they can be computed.(c) Derived attributes must be stored.(d) Derived attributes are usually stored because storage improves retrieval performance.4. A weak entity type implies a (c)(a) relationship with partial participation constraint(b) strong relationship type(c) relationship with total participation constraint(d) weak relationship type5.In the Entity-Relationship model, properties that characterize entities and relationships are modeled as (c)(a) weak entities(b) entity types(c) attributes(d) participation constraints6. In the Entity-Relationship model, a derived attribute is one (c)(a) that is composed of multiple atomic attributes(b) that may have multiple values simultaneously(c) whose value can be computed from the values of other attributes(d) that characterizes a relationship instead of an entity7. In an ER model, which of the following is true about a component attribute? (b)(a) A component attribute always contains other components.(b) A component attribute can be a composite attribute.(c) A component attribute is always atomic.(d) Component attributes must always be combined by an aggregation operation.8. In ER modeling, generalization is the process of generating (b)(a) entities out of attributes(b) superclasses out of subclasses(c) subclasses out of superclasses(d) attributes out of entities9. Which of the following is true about attributes in a relational model? (d)Attributes can be multi-valued.Attributes can be composite.(a) II only(b) Neither I nor II(c) I only(d) Both I and II10. When mapping from an ER model to a relational model, a strong entity is mapped into a (d)(a) row(b) column(c) key(d) table11. In the Entity-Relationship model, the degree of a relationship specifies which of the following?(d)(a) The cardinality ratio of the relationship(b) The number of attributes that characterize the relationship(c) The number of integrity constraints required to implement the relationship(d) The number of entities that participate in the relationship12. What is an identifying owner in an ER model? (b)(a) The entity upon which a strong entity's existence depends(b) The entity upon which a weak entity's existence depends(c) The relationship that identifies a strong entity's owner(d) The relationship that identifies a weak entity's ownerMultiple-Choice Quiz 61. Which of the following is a property (are properties) exhibited by good relational schemas? The use of null values in tuples (d)The grouping of as many attributes as possible into one main tableThe elimination of data redundancy to avoid update anomalies(a) II and III only(b) None(c) I and II only(d) III only2. Through normalization, update anomalies (c)(a) is usually left unchanged(b) can be minimized but not eliminated(c) can be eliminated(d) can be maximized3. Consider the following functional dependency.{A, B} -> {C}Regarding this dependency, which of the following statements is (are) true? (c)The values of C are uniquely determined by the values of A.The values of A are uniquely determined by the values of C.(a) I and II(b) I only(c) None(d) II only4. Which of the following problems can be caused by data redundancy in a relational schema? Inefficient use of space (a)Update anomalies and possible loss of dataInefficient use of processing time(a) I, II, and III(b) I and II only(c) II only(d) I and III only5. Through normalization, data redundancy (d)(a) can be minimized but not eliminated(b) are usually left unchanged(c) can be maximized(d) can be eliminated6. Consider a table with atomic attributes A, B, and C and the following functional dependencies.A -> BB -> CIf the primary key of this table is attribute A, then this relation satisfies which of the following normal forms? (c)FirstSecondThird(a) I, II and III(b) I only(c) I and II only(d) None7. For a relation to be in 3NF, it should not contain _____ attribute that is transitively dependent on _____. (a)(a) a non-primary key, the primary key(b) a primary key, a non-primary key(c) a primary key, a foreign key(d) a non-primary key, a foreign key8. The FD X -> Y is a full dependency in a relation R, if there is _____ attribute A that can be _____ X and the dependency still holds. (d)(a) at least one, removed from(b) at least one, added to(c) no, added to(d) no, removed from9. For a relation to be in 2NF, _____ attribute must be fully functionally dependent on _____. (b)(a) every alternate key, the primary key(b) every non-primary-key, the primary key(c) every non-key, at least one key(d) every non-key, every key10. The FD X -> Y is a partial dependency in a relation R, if there is _____ attribute A that can be _____ X and the dependency still holds. (c)(a) at least one, added to(b) no, removed from(c) at least one, removed from(d) no, added to11. Which of the following statements concerning normal forms is true? (b)(a) The lower the normal form number, the better the schema design is.(b) A relation that is in second normal form is also in first normal form.(c) Schemas that are in second normal form are considered the best.(d) Each normal form contains a state of independent properties, unrelated to other normal forms.Multiple-Choice Quiz 71. All changes made by a committed transaction can be recovered (d)(a) only if there have been no software failures(b) only if there have been no hardware failures(c) only if there have been no software AND no hardware failures(d) irrespective of whether there have been hardware or software failures2. Is it possible for a valid transaction to see the modified, yet uncommitted data of another valid transaction when the isolation level is set to SERIALIZABLE? (a)(a) It is not possible for a transaction to see the modified, yet uncommitted, data of another transaction, even if both transactions are working on the same data, and even if both transactions are concurrent.(b) It is possible for a transaction to see the modified, yet uncommitted, data of another transaction even if both transactions are not working on the same data, AND even if both transactions are NOT concurrent.(c) It is possible for a transaction to see the modified, yet uncommitted, data of another transaction only if both transactions work on the same data, AND both transactions are NOT concurrent.(d) It is possible for a transaction to see the modified, yet uncommitted, data of another transaction, only if both transactions work on the same data, AND both transactions are concurrent.3. A livelock occurs when (a)(a) a transaction is aborted and restarted repeatedly(b) a transaction holding a lock is aborted(c) 2 or more transactions wait indefinitely because each holds the data items of another(d) an aborted transaction holding a lock is restarted4. In a two-phase locking protocol, what happens during the growing phase? (d)(a) The transaction can acquire locks, and can release its locks.(b) The transaction cannot acquire locks, but can release its locks.(c) The transaction can acquire locks, and can release its locks as long as the number of acquired locks is greater than the number of released locks.(d) The transaction can acquire locks, but cannot release its locks.5. An exclusive lock on a data item represents permission to perform which of the operations, read and write, on the data item? (c)(a) Read only(b) Neither read nor write(c) Both read and write(d) Write only6. In a two-phase locking protocol, what happens during the shrinking phase? (a)(a) The transaction cannot acquire locks, but can release its locks.(b) The transaction can acquire locks, but cannot release its locks.(c) The transaction can acquire locks, and can release its locks.(d) The transaction can acquire locks, and can release its locks as long as the number of released locks is greater than the number of acquired locks.7. The strict two-phase locking protocol is _____ to implement. (c)(a) easier than most two-phase locking protocols(b) more difficult than most two-phase locking protocols(c) the easiest two-phase locking protocol(d) the most difficult two-phase locking protocol8. Force propagation policy _____ redo actions, and no-force propagation policy _____ redo actions. (a)(a) does not require, requires(b) requires, requires(c) requires, does not require(d) does not require, does not require9.Immediate update policy _____ undo actions, and deferred update policy _____ undo actions.(c)(a) does not require, requires(b) does not require, does not require(c) requires, does not require(d) requires, requires10. During recovery, in which of the following ways are the before and after images used by the undo and redo actions? (d)undo action uses the before imageundo action uses the after imageredo action uses the after imageredo action uses the before image(a) I, II, and III only(b) I, III, and IV only(c) I, II, III, and IV(d) I and III onlyMultiple-Choice Quiz 81. Which of the following are properties of a good hash function? (c)It should be computed efficiently.It should minimize the number of collisions by spreading keys as evenly and uniformly as possible.It should always use the Modulo (MOD) function.(a) I only(b) III only(c) I and II only(d) II only2. Where do heap files add new records? (c)(a) at random locations in the heap file(b) in the middle of the heap file(c) at the end of the heap file(d) at the beginning of the heap file3. Hashing exhibits the best performance for(a) range queries(b) ordering query results based on the key used for hashing(c) equality searches involving the key, provided the key is used for hashing(d) sequential scan of the entire table4. A sparse index contains entries for (a)(a) some records of a table(b) some fields of a table(c) all fields of a table(d) all records of a table5. A primary index _____ defined on a key field, and a secondary index _____ defined on a key field. (d)(a) need not be, should not be(b) should be, should not be(c) need not be, need not be(d) should be, need not be6. Each index entry in an index file contains (c)an indexing valuea pointer to the page where the record with the value appearsan indexing function(a) I only(b) I, II, and III(c) I and II only(d) III only7. A cylinder of a multi-platter hard disk consists of (b)(a) the outermost track(b) tracks with the same diameter(c) the innermost track(d) tracks with different diameters8. To improve the performance of a database, (d)(a) never use buffering when transferring data between secondary storage and main memory(b) never use hash files when deciding on an appropriate indexing structure(c) always use hash files when deciding on an appropriate indexing structure(d) minimize the amount of data transferred between secondary storage and main memory9. The term block transfer time refers to the amount of time it takes to (c)(a) load the address of a disk block from an index(b) move the read/write head to the appropriate track on the disk(c) read data from a disk(d) position the appropriate disk block under the read/write head10. The term blocking factor refers to the number of (c)(a) disk blocks that form a track(b) disk blocks that are on a hard disk drive platter(c) database records that can be stored on a disk block(d) cylinders on a hard disk drive11. How does chained overflow solve the problem of collisions in hashing? (d)(a) The first available empty bucket in a chained list of buckets is used.(b) The first available slot in the overflow area where slots are chained using a hash function is used.(c) The first available slot in a linked list of slots that is connected to the collision slot is used.(d) The first available slot in a linked list of overflow buckets that is connected to the hashed bucket is used.12. A secondary index is an index defined on a(n) _____ field. (a)(a) non-ordering(b) ordering(c) primary key(d) alternate key13. Which of the following can be used to measure hard disk drive performance? (b)Seek timeRotational latency。
整理过程参考了一末夕阳的博客，复习过程的心得是，一百题看完复习前一部分,同时我还整理了一份打印版本的，上面只有题目，没有答案，建议在电脑上先看答案整理那一份,没有答案的那份打印出来，复习使用，可以有效加强记忆。
1.While deploying a new application module, the software vendor ships the application software along with appropriate SQL plan baselines for the new SQLs being introduced。
Which two statements describe the consequences? (Choose two.)A。
The plan baselines can be evolved over time to produce better performance。
B. The newly generated plans are directly placed into the SQL plan baseline without being verified。
C。
The new SQL statements initially run with the plans that are known to produce good performance under standard test configuration.D. The optimizer does not generate new plans for the SQL statements for which the SQL plan baseline has been imported.当部署一个新的应用模块时，软件供应商与用于被引入的新SQL的适当的SQL计划基线一起运送应用软件。
哪两个语句描述了后果？A，计划基线可以随着时间的推移演变,产生更好的性能。
自动化专业英语词汇12022-03-18 16:18自动化专业英语词汇 [/b][b]加速度传感器acceleration transduceracceptance testing验收测试可及性accessibility积累误差accumulated error交-直-交变频器AC-DC-AC frequency converter交流电子传动AC (alternating current) electric drive主动姿态稳定active attitude stabilization驱动器，执行机构actuator线性适应元adaline适应层adaptation layer适应遥测系统adaptive telemeter system伴有算子adjoint operator容许误差admissible error集结矩阵aggregation matrix层次分析法AHP (analytic hierarchy process)放大环节amplifying elementanalog-digital conversion模数转换信号器annunciator天线指向控制antenna pointing control抗积分饱卷anti-integral windup非周期分解aperiodic decomposition后验估计a posteriori estimate近似推理approximate reasoning先验估计a priori estimate关节型机器人articulated robot配置问题，分配问题assignment problem联想记忆模型associative memory modelassociatron联想机渐进稳定性asymptotic stability实际位姿漂移attained pose drift姿态捕获attitude acquisition姿态轨道控制系统AOCS (attritude and orbit control system)姿态角速度attitude angular velocity姿态扰动attitude disturbance姿态机动attitude maneuver吸引子attractor可扩充性augment ability增广系统augmented systemautomatic manual station自动-手动操作器自动机automatonbacklash characteristics间隙特性基座坐标系base coordinate system贝叶斯分类器Bayes classifier方位对准bearing alignment波纹管压力表bellows pressure gauge收益成本分析benefit-cost analysisbilinear system双线性系统生物控制论biocybernetics生物反馈系统biological feedback systemblack box testing approach黑箱测试法盲目搜索blind search块对角化block diagonalization玻耳兹曼机Boltzman machine自下而上开辟bottom-up development边界值分析boundary value analysis头脑风暴法brainstorming method广度优先搜索breadth-first search蝶阀butterfly valve计算机辅助工程CAE (computer aided engineering) CAM (computer aided manufacturing)计算机辅助创造偏心旋转阀Camflex valve规范化状态变量canonical state variable电容式位移传感器capacitive displacement transducer膜盒压力表capsule pressure gauge计算机辅助研究开辟CARD直角坐标型机器人Cartesian robot串联补偿cascade compensation突变论catastrophe theory集中性centrality链式集结chained aggregationchaos混沌特征轨迹characteristic locus化学推进chemical propulsion清晰性calrity经典信息模式classical information pattern分类器classifierclinical control system临床控制系统闭环极点closed loop pole闭环传递函数closed loop transfer functioncluster analysis聚类分析粗-精控制coarse-fine control蛛网模型cobweb modelcoefficient matrix系数矩阵认知科学cognitive sciencecognitron认知机单调关联系统coherent system组合决策combination decision组合爆炸combinatorial explosion压力真空表combined pressure and vacuum gauge指令位姿command posecompanion matrix相伴矩阵房室模型compartmental model相容性，兼容性compatibilitycompensating network补偿网络补偿，矫正compensation柔顺，顺应compliance组合控制composite control可计算普通均衡模型computable general equilibrium model条件不稳定性conditionally instability组态configuration连接机制connectionism连接性connectivity守恒系统conservative systemconsistency一致性约束条件constraint condition消费函数consumption function上下文无关语法context-free grammar连续离散事件混合系continuous discrete event hybrid system sim 统仿真连续工作制continuous duty控制精度control accuracy控制柜control cabinet可控指数controllability index可控规范型controllable canonical form[control] plant控制对象,被控对象控制仪表controlling instrument控制力矩陀螺control moment gyro控制屏，控制盘control panel控制[式]自整角机control synchro控制系统综合control system synthesiscontrol time horizon控制时程合作对策cooperative game可协调条件coordinability conditioncoordination strategy协调策略协调器coordinator转折频率corner frequencycostate variable共态变量费用效益分析cost-effectiveness analysiscoupling of orbit and attitude轨道和姿态耦合临界阻尼critical damping临界稳定性critical stability穿越频率，交越频率cross-over frequency电流[源]型逆变器current source inverter截止频率cut-off frequencycybernetics控制论循环遥控cyclic remote control圆柱坐标型机器人cylindrical robotdamped oscillation阻尼振荡阻尼器damper阻尼比damping ratio数据采集data acquisition数据加密data encryption数据预处理data preprocessing数据处理器data processor直流发机电-电动机组传动DC generator-motor set drive微分控制器D controller分散性decentralitydecentralized stochastic control分散随机控制决策空间decision space决策支持系统decision support system分解集结法decomposition-aggregation approach解耦参数decoupling parameter演绎与归纳混合建模法deductive-inductive hybrid modeling method 延时遥测delayed telemetry导出树derivation tree微分反馈derivative feedback描述函数describing function希翼值desired valuedespinner消旋体目的站destination检出器detector确定性自动机deterministic automaton偏差 舱deviation偏差报警器deviation alarmDFD数据流图诊断模型diagnostic model对角主导矩阵diagonally dominant matrixdiaphragm pressure gauge膜片压力表差分方程模型difference equation model微分动力学系统differential dynamical systemdifferential game微分对策差压液位计differential pressure level meterdifferential pressure transmitter差压变送器差动变压器式位移传感differential transformer displacement trans 器differentiation element微分环节数字滤波器digital filer数字信号处理digital signal processing数字化digitization数字化仪digitizer尺度传感器dimension transducerdirect coordination直接协调解裂disaggregation失协调discoordinationdiscrete event dynamic system离散事件动态系统离散系统仿真语言discrete system simulation language判别函数discriminant function位移振幅传感器displacement vibration amplitude transducer耗散结构dissipative structure分布参数控制系统distributed parameter control systemdistrubance扰动扰动补偿disturbance compensation多样性diversitydivisibility可分性领域知识domain knowledgedominant pole主导极点剂量反应模型dose-response model双重调制遥测系统dual modulation telemetering system对偶原理dual principle双自旋稳定dual spin stabilization负载比duty ratiodynamic braking能耗制动动态特性dynamic characteristics动态偏差dynamic deviationdynamic error coefficient动态误差系数动它吻合性dynamic exactness动态投入产出模型dynamic input-output model计量经济模型econometric model经济控制论economic cybernetics经济效益economic effectiveness经济评价economic evaluation经济指数economic index经济指标economic indicator电涡流厚度计eddy current thickness metereffectiveness有效性效益理论effectiveness theoryelasticity of demand需求弹性电动执行机构electric actuator电导液位计electric conductance levelmeter电动传动控制设备electric drive control gear电-液转换器electric hydraulic converter电-气转换器electric pneumatic converter electrohydraulic servo vale电液伺服阀电磁流量传感器electromagnetic flow transducer电子配料秤electronic batching scaleelectronic belt conveyor scale电子皮带秤电子料斗秤electronic hopper scale仰角elevation异常住手emergency stop经验分布empirical distribution内生变量endogenous variable均衡增长equilibrium growth平衡点equilibrium point等价类划分equivalence partitioning工效学ergonomicserror误差纠错剖析error-correction parsing估计量estimate估计理论estimation theory评价技术evaluation technique事件链event chain进化系统evolutionary system外生变量exogenous variable希翼特性expected characteristics外扰external disturbance事实fact basefailure diagnosis故障诊断快变模态fast mode可行性研究feasibility study可行协调feasible coordination可行域feasible region特征检测feature detectionfeature extraction特征抽取反馈补偿feedback compensation前馈通路feedforward pathfield bus现场总线有限自动机finite automaton工厂信息协议FIP (factory information protocol) first order predicate logic一阶谓词逻辑固定顺序机械手fixed sequence manipulatorfixed set point control定值控制柔性创造系统FMS (flexible manufacturing system)流量传感器flow sensor/transducer流量变送器flow transmitter涨落fluctuation强迫振荡forced oscillationformal language theory形式语言理论形式神经元formal neuron正向通路forward pathforward reasoning正向推理分形体，分维体fractal变频器frequency converter频域模型降阶法frequency domain model reduction method 频域响应frequency response全阶观测器full order observer功能分解functional decomposition功能电刺激FES (functional electrical stimulation)功能相似functional simularity含糊逻辑fuzzy logicgame tree对策树闸阀gate valve普通均衡理论general equilibrium theory广义最小二乘估计generalized least squares estimation生成函数generation function地磁力矩geomagnetic torque几何相似geometric similarity框架轮gimbaled wheel全局渐进稳定性global asymptotic stability全局最优global optimum球形阀 徢globe valvegoal coordination method目标协调法文法判断grammatical inference图搜索graphic search重力梯度力矩gravity gradient torque成组技术group technology制导系统guidance systemgyro drift rate陀螺漂移率陀螺体gyrostat霍尔式位移传感器Hall displacement transducerhardware-in-the-loop simulation半实物仿真和谐偏差harmonious deviation和谐策略harmonious strategyheuristic inference启示式推理隐蔽振荡hidden oscillationhierarchical chart层次结构图递阶规划hierarchical planning递阶控制hierarchical control内稳态homeostasis同态系统homomorphic model横向分解horizontal decomposition内分泌控制hormonal control液压步进马达hydraulic step motor超循环理论hypercycle theoryI controller积分控制器可辨识性identifiabilityIDSS (intelligent decision support system)智能决策支持系统图象识别image recognition冲量impulse冲击函数，脉冲函数impulse function点动inching不相容原理incompatibility principle增量运动控制incremental motion control品质因数index of merit电感式位移传感器inductive force transducer归纳建模法inductive modeling method工业自动化industrial automation惯性姿态敏感器inertial attitude sensor惯性坐标系inertial coordinate systeminertial wheel惯性轮推理机inference engine无穷维系统infinite dimensional system信息采集information acquisition红外线气体分析器infrared gas analyzer知识顺应卡尔曼-布西滤波器knowledge accomodation Kalman-Bucy filer知识同化KBMSknowledge acquisition知识获取knowledge assimilation知识库管理系统 瓢knowledge(knowledge base management system)滞梯形图lag-lead compensatio representation知识表达ladder diagramtransform拉格朗日对偶性Laplace拉普拉斯变duality后超前补偿Lagrange侧抑制网换large scale system大系统lateral inhibition network最小成本投入least squares criterion最小二乘准络 least cost input天平动阻尼 limit极cycledamping则 levelswitch物位开关 libration直线性化方法linear motion electric 限环linearization technique线性规划programming直行程阀linear线运动电气传动linearmotionvalve线性二次调节器问题loadcellproblem)称regulatorLQR(linearquadratic局部最局部渐近稳定性localoptimumstability重传感器localasymptotic对数幅相图long term memory长期记忆优log magnitude-phase diagram集总参数模型Lyapunov theorem of asymp lumped parameter model宏观经济系统stability李雅普诺夫渐近稳定性定理macro-economic systemmagnetic dumping磁致弹性称重传感磁卸载magnetoelastic weighing cell幅值裕器magnitude-frequency characteristic幅频特性magnitude margin机械手man-machine幅值比例尺manipulator度magnitude scale factor人机协调manual station手动操作器MAP (manufacturing coordination边际效益创造自动化协议marginal effectiveness automation protocol)梅森增益公式 master station主站matchingMason''s gain formula最大似然估计maximum 匹配准则maximum likelihood estimation criterion极大值原理mean-square error overshoot最大超调量maximum principle元知识机理模型meta-knowledge 均方误差准则mechanism modelcriterion冶金自动化minimal realization最小实现metallurgical automation最小方差最小相位系统minimum variance estimatio minimum phase system副回路missile-target relative movement弹体-估计minor loop模态集结 modal transformatio模目标相对运动仿真器modal aggregation模型置信度modelfidelity模型库 modelconfidence(modelbase)态变换MB模型参考适应控制模型逼真度 model reference adaptive control sy模块化 MEC (most模型验证 modularization系统model verification最经济控制 motion space可动空间MTBF (mean time economic control)平均无平均故障间隔时间MTTF (mean time to failur between failures)多属性效用函数故障时间multi-attributive utility function多级递阶结构多重判据multilevel hierarchical structu multicriteria多目标决策multiloop control多回路控制 multi-objective decisioncontrol多段递阶控hierarchical多态逻辑 multistratummultistatelogiccontrol多变量控制系统myoelectric肌电system制multivariablecontrol纳什最优性natural language generation自然语言生控制Nash optimality必然性侧度negative最近邻necessity measure成nearest-neighbor神经神经集合neural network compute 负反馈 neural assemblyfeedback思维科学noncoherent尼科尔斯图noetic science网络计算机Nichols chart非合作博弈nonequilibrium system非单调关联系统noncooperative gamelogic非线性环节nonmonotonic非单调逻stateelement非平衡态nonlinear不可非参数训练nonreversible electric dr 辑nonparametric training非奇妙摄动 non-stationary ra 逆电气传动nonsingular perturbation核辐射物位非平稳随机过程 nuclear radiation levelmeter processcriterion奈奎斯特稳stability章动敏感器 Nyquistsensor计 nutation可观测指数目标函数observability index定判据objective function在线匡助可观测规范型on-line assistance observable canonical form开环极点operational researc on-off control通断控制open loop poletrajectory光纤式转速表optimaltachometermodel运筹学模型 opticfiber最优化技术orbital rendezvous轨道交会最优轨迹 optimization technique轨道摄动order轨道陀螺罗盘orbit perturbationorbit gyrocompass始发站定向控制originatorparameter序参数orientation control输出预估法oval振荡周期 output prediction method oscillating period过阻design总体设计overdamping椭圆齿轮流量计overallwheelflowmeterapproximation帕德近似Pareto交叠分解Padedecomposition尼overlapping被动姿态稳定optimality帕雷托最优性passive attitude stabilizationpath repeatability 路径可重复性pattern primitive 模式基元PR (pattern recognition) 模式识别P control 比例控制器peak time 峰值时间penalty function method 罚函数法perceptron 感知器periodic duty 周期工作制perturbation theory 摄动理论 pessimistic value 悲观值phase locus 相轨迹phase trajectory 相轨迹phase lead 相位超前photoelectric tachometric transducer 光电式转速传感器phrase-structure grammar 短句结构文法physical symbol system 物理符号系统piezoelectric force trans 压电式力传感器playback robot 示教再现式机器人PLC (programmable log controller) 可编程序逻辑控制器plug braking 反接制动plug valve 旋塞阀pneumatic actuator 气动执行机构point-to-point control 点位控制polarrobot 极坐标型机器人pole assignment 极点配置pole-zero cancellation 零极点相消polynomial input 多项式输入portfolio theory 投资搭配理论poseovershoot 位姿过调量 position measuring instrument 位置测量仪posentiometric displacement transducer 电位器式位移传感器positivefeedback 正反馈power system automation 电力系统自动化predicate logic 谓词逻辑pressure gauge with electric contact 电接点压力表pressuretransmitter 压力变送器price coordination 价格协调primal coordinatio 主协调primary frequency zone 主频区PCA (principal component 主成份分析法principle of turnpike 大道原理priority 优先级process-oriented simulation 面向过程的仿真production budget 生产预算production rule 产生式规则profit forecast 利润预测PERT (program evaluation and review technique) 计划评审技术program set station 程序设定操作器proportional control 比例控制proportional plus deriv controller 比例微分控制器protocol engineering 协议工程prototype 原型pseudo random sequence 伪随机序列pseudo-rate-increment cont 伪速率增量控制pulse duration 脉冲持续时间pulse frequency modulatio system 脉冲调频控制系统pulse width modulation control 脉冲调宽控制系统PWM inverter 脉宽调制逆变器pushdown automaton 下推自动机QC(quality control) 质量管理quadratic performance index 二次型性能指标qualitative physical model 定性物理模型quantized noise 量化噪声quasilinear characteristics 准线性特性queuing theory 排队论radiofrequency sensor 射频敏感器ramp function 斜坡函数random disturbance 随机扰动random process 随机过程rate integrating gyro 速率积分陀螺ratio station 比值操作器reachability 可达性reaction wheel control 反作用轮控制realizability可实现性,能实现性real time telemetry 实时遥测receptive field 感受野rectangular robot 直角坐标型机器人rectifier 整流器recursive estimation 递推估计reduced order observer 降阶观测器redundant information 冗余信息reentry control 再入控制regenerative braking 回馈制动，再生制动regional planning model 区域规划模型regulating device 调节装载regulation 调节relational algebra 关系代数relay characteristic 继电器特性 remote manipulator 遥控操作器 remote regulating 遥调 remote set point adjuster 远程设定点调整器 rendezvous and docking 交会和对接reproducibility 再现性resistance thermometer sensor 热电阻 resolution principle 归结原理resource allocation响应曲线return difference 资源分配response curve回响回比矩阵reverberationmatrix回差矩阵return ratio matrix可逆电气传动revolute robot关节型机器人reversible electric drive转速传感器rewriting rule重写规则rigidrevolution speed transducer风险分析robotics机器decisiondynamics刚性航天动力学riskspacecraft机器人编程语言robust control鲁棒控制人学robot programming language辊缝测量仪rootlocus根instrumentmeasuringrobustness鲁棒性rollgap浮子流量计，转子流量计rotary腰轮流量计rotameter轨迹rootsflowmeter角行程阀rotating eccentric plug valve偏心旋转阀rotary motion valve劳思近似判据routing transformer旋转变压器Routh approximation method采样控制系统sampling 路径问题sampled-data control systemproblem饱和特性scalarcontrol system采样控制系统saturation characteristics标量李雅普诺夫函数SCARA (selective complia Lyapunov function情景分析assembly robot arm)平面关节型机器人scenario analysis method域 self-operated controll自力物景分析s-domain s法scene analysis自组织系统self-reproducing自繁systemsystem式控制器self-organizing语义网络殖系统 self-tuning control自校正控制semantic network半实物仿真sensing element敏感元件semi-physical simulation感觉控制 sequential灵敏度分析 sensory controlsensitivity analysis序贯最小二decomposition顺序分解sequential least squares estima伺服控制，随动控制servomotortime伺服马达settlingcontrol乘估计servo短期计划short time horizo 六分仪short term planning过渡时间sextantestimation信号检测和估andcoordinationdetection短时程协调 signal相似性simulated interru 计signal reconstruction信号重构similarity仿真实experiment仿真框图simulation仿真中断simulationblockdiagram单轴仿真器single axle table验simulation velocity仿真速度simulator单单自由度陀螺single level proces 转台single degree of freedom gyroattractor单值非线性singular奇妙吸引nonlinearity级过程singlevalue受役系统汇点slaved system子singular perturbation奇妙摄动sink慢变子系统欠实时仿真slow subsystemslower-than-real-time simulation社会经济系统softwaresystem社会控制论socioeconomicsocio-cybernetics太阳帆板指向控制软件心理学solar array pointing control psychology比冲speed control源点specific impulsesolenoid valve电磁阀source自旋体stability criterion自旋轴spinner稳调速系统spin axissystem镇定，稳定Stackelberg定性判据stability limit稳定极限stabilization状态方程模型decision theory施塔克尔贝格决策理论state equation model静态状态空间描述static characteristics c state space description平稳随机特性曲线 station accuracy定点精度stationary random process统计模patternrecognition统计分析statistic过程statisticalanalysiserrorcoefficient稳statestate稳态偏差steady式识别steadydeviation阶跃函数stepwisefunctioncontrol步进控制step态误差系数step-by-step随机有限自动机 strain 逐步精化stochastic finite automaton refinement策略函数strongly应变式称重传感器strategic functiongauge load cell主观频率suboptimalityprobabilitycoupledsystem强耦合系统subjective次优性supervised training监督学习supervisory computer cont旋进流量计自持振荡swirlmeter计算机监控系统sustained oscillation符号处理synapticprocessingplasticity 切换点symbolicswitchingpoint句法分析system突触可塑性synergetics协同学 syntactic analysis系统同态系统学system homomorphism assessment系统评价systematology系统工程tachometerengineering转速系统同构systemsystemisomorphism作业周期 teaching表target flow transmitter靶式流量变送器task cycle远动学telemetering system of programming示教编程telemechanics遥测teleological频分遥测系统telemetrysystem divisiontypefrequency温度传感器template目的论temperature transducer目的系统teleologyproving纹理 theorem定理证明base张力计 texture模版库tensiometer温度计thickness热电偶thermometer治疗模型thermocoupletherapymodel三轴姿态稳定threestatestabilization厚度计 three-axisattitudemeter推力矢量控制系统controller三位控制器 thrust vector control system定常系统，时间常数time-invariant system 推力器time constantthruster时序控制器time-sharing control分非时变系统time schedule controller自上而下测试时变参数top-down testing时控制time-varying parameter全面质量管拓扑结构TQC (total quality control) topological structure权衡分析transferfunctionanalysis跟踪误差trade-off理trackingerrordeviation转换文法transientmatrixgrammar传递函数矩阵transformation过渡过程transition diagram转移图瞬态偏差transient process变送器trend电远传压力表transmittertransmissible pressure gauge三重调制遥测系趋势分析triple modulation telemetering sys analysis图灵机two-time scale涡轮流量计Turing machine统turbine flowmeter超声物位计unadjustable speed system双时标系统ultrasonic levelmeter无偏估计underdampingestimationdrive非调速电气传动unbiasedelectric一致渐近稳定性uninterrupteddutyasymptoticstability欠阻尼 uniformly单元测试单位圆unit testing不间断工作制，长期工作制unit circle上级问题urban非监督学习 upper level problem unsupervised learing价值工程效用函数value engineering planning城市规划utility function可变增益，可变放大系数variable structure contr variable gain变结构控制vector Lyapunov function向量李雅普诺夫函数velocity error速度传感器verticalcoefficient速度误差系数velocity transducer振弦式力传感器decomposition纵向分解vibrating wire force transducerinvertersource电压振动计viscous粘性阻尼voltagevibrometerdamping旋进流量计vortex shedding源型逆变器vortex precession flowmeter方法库weighing cell称重传感器涡街流量计WB (way base)flowmeter权因子weighting method加权法Whittaker-Shannon weighting factor维纳滤波work惠特克-香农采样定理Wiener filteringsampling theorem平面计算机辅助设计工作站w-plane wstation for computer aided design零基预算zero-input response零输入响应zero-statezero-based budget变换零和对策模型z-transform z 零状态响应zero sum game modelresponse。
数据库自动化检查方法As technology continues to advance, the need for automated database checking methods has become increasingly important. 数据库自动化检查方法的需求变得日益重要。
Automating the process of checking databases can help save time, reduce human error, and ensure that data is accurate and consistent. 自动化数据库检查的流程可以节省时间，减少人为错误，并确保数据准确和一致。
There are several different methods and tools that can be used to automate database checks, each with its own set of advantages and disadvantages. 有几种不同的方法和工具可以用来自动化数据库检查，每种方法都有其自身的优点和缺点。
It's important to consider the specific needs of your organization and the type of data being stored when choosing the right automated database checking method. 当选择合适的自动化数据库检查方法时，重要的是考虑到组织的具体需求和存储的数据类型。
One of the most common methods for automating database checks is using scripts and scheduling tools. 自动化数据库检查最常见的方法之一是使用脚本和调度工具。
Unit 1【Ex1.】根据课文内容，回答以下问题。
1．In human terms and in the broadest sense, information is anything that you are capable of perceiving. 2．It includes written communications, spoken communications, photographs, art, music, and nearly anything that is perceptible.3．If we consider information in the sense of all stimuli as information, then we can’t really find organization in all cases.4．No.5．Traditionally, in libraries, information was contained in books, periodicals, newspapers, and other types of recorded media. People access it through a library’s catalog and with the assistance of indexes, in the case of periodical and newspaper articles.6．Computerized “information systems”.7．The problem for most researchers is that they have yet to discover the organizing principles that are designed to help them find the information they need.8．For library materials, the organizing principle is a detailed subject classification system available for searching in an online “catalog”.9．The one thing common to all of these access systems is organization.10．No, it isn’t.【Ex2.】根据给出的汉语词义和规定的词类写出相应的英语单词。
矿产资源开发利用方案编写内容要求及审查大纲
矿产资源开发利用方案编写内容要求及《矿产资源开发利用方案》审查大纲一、概述
㈠矿区位置、隶属关系和企业性质。
如为改扩建矿山, 应说明矿山现状、
特点及存在的主要问题。
㈡编制依据
(1简述项目前期工作进展情况及与有关方面对项目的意向性协议情况。
(2 列出开发利用方案编制所依据的主要基础性资料的名称。
如经储量管理部门认定的矿区地质勘探报告、选矿试验报告、加工利用试验报告、工程地质初评资料、矿区水文资料和供水资料等。
对改、扩建矿山应有生产实际资料, 如矿山总平面现状图、矿床开拓系统图、采场现状图和主要采选设备清单等。
二、矿产品需求现状和预测
㈠该矿产在国内需求情况和市场供应情况
1、矿产品现状及加工利用趋向。
2、国内近、远期的需求量及主要销向预测。
㈡产品价格分析
1、国内矿产品价格现状。
2、矿产品价格稳定性及变化趋势。
三、矿产资源概况
㈠矿区总体概况
1、矿区总体规划情况。
2、矿区矿产资源概况。
3、该设计与矿区总体开发的关系。
㈡该设计项目的资源概况
1、矿床地质及构造特征。
2、矿床开采技术条件及水文地质条件。
矿产资源开发利用方案编写内容要求及审查大纲
矿产资源开发利用方案编写内容要求及《矿产资源开发利用方案》审查大纲一、概述
㈠矿区位置、隶属关系和企业性质。
如为改扩建矿山, 应说明矿山现状、
特点及存在的主要问题。
㈡编制依据
(1简述项目前期工作进展情况及与有关方面对项目的意向性协议情况。
(2 列出开发利用方案编制所依据的主要基础性资料的名称。
如经储量管理部门认定的矿区地质勘探报告、选矿试验报告、加工利用试验报告、工程地质初评资料、矿区水文资料和供水资料等。
对改、扩建矿山应有生产实际资料, 如矿山总平面现状图、矿床开拓系统图、采场现状图和主要采选设备清单等。
二、矿产品需求现状和预测
㈠该矿产在国内需求情况和市场供应情况
1、矿产品现状及加工利用趋向。
2、国内近、远期的需求量及主要销向预测。
㈡产品价格分析
1、国内矿产品价格现状。
2、矿产品价格稳定性及变化趋势。
三、矿产资源概况
㈠矿区总体概况
1、矿区总体规划情况。
2、矿区矿产资源概况。
3、该设计与矿区总体开发的关系。
㈡该设计项目的资源概况
1、矿床地质及构造特征。
2、矿床开采技术条件及水文地质条件。
