移动互联网导论(第3版)大三实验手册lab6_introduction
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新教科版六年级上册科学第3单元第7课《信息的交流传播》说课稿一. 教材分析《信息的交流传播》是新教科版六年级上册科学第3单元第7课的内容。
本节课主要让学生了解和掌握信息交流和传播的基本原理和方法。
教材通过生活中的实例,引导学生探究信息传递的途径和方式,使学生认识到信息交流在人们生活中的重要性。
教材内容丰富,贴近生活,能够激发学生的学习兴趣和探究欲望。
二. 学情分析六年级的学生已经具备了一定的信息交流和传播的基础知识,对生活中的一些信息传递方式有所了解。
但他们对信息交流和传播的原理和方法的认识还不够深入,需要通过课堂学习进一步拓展和提升。
此外,学生们的思维活跃,动手能力强,适合采用实践探究的学习方式。
三. 说教学目标1.知识与技能:了解信息交流和传播的基本原理,掌握几种常见的信息传递方式。
2.过程与方法:通过观察、实验和分析,学会探究信息传递的方法。
3.情感态度价值观:认识信息交流在人们生活中的重要性,培养学生的信息素养。
四. 说教学重难点1.教学重点:信息交流和传播的基本原理,常见信息传递方式。
2.教学难点:信息传递方式的原理和应用。
五. 说教学方法与手段本节课采用情境教学法、问题教学法和小组合作学习法。
利用多媒体课件、实验器材等教学手段,引导学生主动探究,提高学生的学习兴趣和参与度。
六. 说教学过程1.导入:通过一个生活中的实例,如电话通话,引出本节课的主题——信息的交流传播。
2.探究信息传递的原理:引导学生观察和分析实例,探讨信息传递的途径和方式。
3.学习常见信息传递方式:介绍几种常见的信息传递方式,如声音、文字、图像等。
4.小组合作探究:分组进行实验,让学生亲身体验信息传递的过程,并分析讨论信息传递的原理。
5.总结与拓展:总结本节课的主要内容,布置课后作业,拓展学生的知识视野。
七. 说板书设计板书设计如下:信息交流传播1.原理:……八. 说教学评价本节课的教学评价主要从学生的学习兴趣、参与度、实践操作能力和对知识的理解掌握程度等方面进行。
2023年硬件实习报告汇编十篇硬件实习报告篇1一、实习目的:1、练习和巩固识别计算机部件的方法,并能在一定的条件下判断计算机部件的好坏与优劣。
2、练习和巩固多媒体计算机硬件安装基本方法与步骤,锻炼学生的动手能力,使学生不仅仅能组装计算机,更能合理和更优的方式组装计算机。
3、练习和巩固计算机软件的安装方法与步骤,使得学生掌握在真实的、实际工作中安装多媒体计算机软件的方法与步骤。
4、掌握和巩固多媒体计算机故障处理。
能在遇到的各种硬件、软件的故障处理中,自己动手和动脑、并在老师的指导下,掌握基本的处理方法,积累一定的经验。
二、实习地点:四教学楼6楼,计算机组装与维修实验室三、时间:第十四周,星期一至星期五四、指导老师五、实习组员:向前、谢静、陈永兰、刘丹组长:向前六、实习计划:七、实习过程: __-12-11 星期一上午地点:石桥铺电脑城星期天接到老师的实习要求,需要windosw 98安装光盘一张(带有启动功能),所以就去石桥铺电脑城购买,顺便去看看现在流行的硬件,开阔眼界,扩充知识。
买到光盘发现有人在买电脑,这样的好机会,我怎么会放过呢?买家是某大学的大一的新生,买电脑的要求为:玩游戏、上网、学习,组装机,价位是5000元左右。
商家给出下面的配置单:配件型号 cpu amd athlon 64 2800+ 主板华硕k8n 内存金士顿 512mb ddr400 硬盘日立7k 250 80g dvd-rom 台电女神v100 16xdvd-rom 显卡迪兰恒进镭姬杀手9550 这都是些主要的,对学生这样的配置应该是可以了,cpu是amd的,本人用的也是amd的,和同班的电脑比起来也差不到那去,都说amd的cpu发热量很大,但是我的电脑一般都是长开机的,没有什么不正常的。
而且价格也比同类的intel低很多。
就是硬盘小了点,120g 才够吧。
显卡有128m的显存,玩3d游戏也足够了,做简单的图形设计也行。
第3课互联网应用体验教案 2023—2024学年浙教版(2023)初中信息技术七年级上册一、教学内容本节课是2023-2024学年浙教版(2023)初中信息技术七年级上册第3课,主题是“互联网应用体验”。
教学内容主要包括:1. 互联网的基本概念:介绍互联网的起源、发展,以及互联网的特点。
2. 浏览器的使用:讲解浏览器的基本功能,如输入网址、搜索信息、保存网页等。
3. 搜索引擎的使用:教授如何使用搜索引擎进行信息检索,包括关键词搜索、图片搜索等。
4. 电子邮件的收发:介绍电子邮件的基本概念,讲解如何注册邮箱、发送邮件、接收邮件等。
5. 网络安全意识:讲解网络安全的重要性,提醒学生注意个人信息保护,防范网络诈骗。
二、核心素养目标1. 信息意识:通过学习互联网的基本概念和浏览器的使用,使学生认识到互联网的重要性和广泛应用,培养其信息意识。
2. 信息社会责任:通过教授电子邮件的收发,让学生了解网络沟通的基本方式,培养其信息社会责任。
3. 信息安全意识:通过讲解网络安全意识,使学生了解网络安全的重要性,培养其信息安全意识。
4. 信息技术应用能力:通过学习搜索引擎的使用,使学生掌握信息检索的基本方法,提高其信息技术应用能力。
三、学习者分析1. 学生已经掌握了哪些相关知识:- 学生已经具备基本的计算机操作能力,如开关机、使用鼠标和键盘。
- 学生已经初步了解计算机软硬件的基本概念。
- 学生已经学习过网络的基本概念,如局域网、广域网等。
2. 学生的学习兴趣、能力和学习风格:- 学生对新鲜事物充满好奇心,对互联网充满兴趣。
- 学生具备一定的逻辑思维能力,能够理解互联网的基本原理。
- 学生喜欢动手实践,愿意通过实际操作来学习新知识。
- 学生喜欢团队合作,愿意与同学共同探讨问题。
3. 学生可能遇到的困难和挑战:- 学生可能对互联网的复杂概念感到困惑,需要教师耐心解释。
- 学生可能在操作浏览器和搜索引擎时遇到困难,需要教师指导。
The backgroundsWhat is the bitcoinThe birth of bitcoinThe development of bitcoinHow bitcoin works?WalletsTransactionMining and consensusChallengesThe BlockchainThe backgroundsWhat is the bitcoinThe birth of bitcoinThe development of bitcoinHow bitcoin works?WalletsTransactionMining and consensusChallengesThe Blockchain20082009Bitcoin —— the first decentralized,peer-to-peer digital cryptocurrencyBitcoin Price Bitcoin prices ushered in a wave of upswing in 2017, from less than $ 1,000 in early 2017 to more than $ 4,000 in September 2017.In the three months between October 2017 and December 2017, bitcoin prices soared more than $ 15,000Bitcoin Market Value At the beginning of 2017, the total market capitalization of bitcoin is about 15 billion U.S. dollars.As of October 2017, the total market capitalization of bitcoin has exceeded 90 billion U.S. dollars. When compared with the annual gross domestic product (GDP) of 191 countries, bitcoin's current market capitalization will be 66thBitcoin mining difficult y Genesis Block was born in January 2009,mining difficulty is 1.As of December 2017, the difficulty of mining has risen to 1500GBitcoin distribu tion The vast majority of bitcoin addresses have less than 1 bitcoinsBitcoin address with more than 1 bitcoins has the vast majority of bitcoinsCan the bitcoin price be manipulated by“the invisible hand”?Important bitcoin transaction eventBitcoin is used to illegal purpose2010-5Laszlo Hanyecz of the United States exchanged $ 25 worth of pizza with 10,000 bitcoins at the time, opening the exchange journey between bitcoin and real products.2011WikiLeaks survived on bitcoin donations after being blocked by many countries' financial blockades.2013-10The world's first Bitcoin ATM machine appeared in a cafe in Canada, enabling Bitcoin and Canadian dollar exchange.2014-3Hong Kong appeared the Bitcoin ATM 2014-12Microsoft accepted bitcoin payments, which makes Bill Gates exciting2015-10EU court ruled that Bitcoin transactions exempt from VAT2017-9The Chinese government announced a ban on the exchange of bitcoin and RMB2012It is estimated that 4.5% to 9% of Bitcointransactions are used for drug trafficking on Silk Road's website.2013-10The FBI, in conjunction with law enforcement agencies, smashed the famous Black Roadwebsite Silk Road and captured its founder, Ross William Ulbricht, Of 2.6W bitcoins , the investigation process is very difficultSubsequently, the FBI has expanded its battle record, in the name of Ubrich, seized and sealed 14.4W bitcoinOutlinesThe backgroundsWhat is the bitcoinThe birth of bitcoinThe development of bitcoinHow bitcoin works?WalletsTransactionMining and consensusChallengesThe Blockchainholds all your bitcoin addresses and private keys. Use it to send, receive and store your bitcoin.is generated from private -Anyone can verify the sender’s authenticity using public key; -The bitcoin address is generated from public key,Used to receive bitcoin;-1DSrfJdB2AnW aFNgSbv3MZC2m7499 6JafV-they consist of a string of letters and numbers starting with a “1” (number one); Bitcoin AddressBob’s bitcoin address Transaction 86(seller)Transaction 1Transaction 5Transaction 34Transaction 54Transaction 86 Jack can receive the bitcoin:Bob encrypts by Jack’s public key ,Jack decrypts by his private key .Strangers can exchange bitcoinson the public networkEach Bitcoin BlockSize <= 1MBPer Block Generation10 minutesGenius BlockBlock 0Pre. BlockTransactionsBlock 1Block 2…Block 464489…Current Block…Block 6,929,999Last BlockPre. BlockTransactionsPre. BlockTransactionsPre. BlockTransactionsField:block sizeSize: 4 bytesDescription: the size of the blockField: block headerSize: 80bytesDescription:several fields form the block header(see below)Field: transaction counterSize:1-9bytesDescription: how many transactions followField: transactionsSize: variableDescription: the transactions recorded in this blockPer Block At most 4000 transactionsVersion Previous Block Hash Timestamp NonceDifficulty Target Merkle Root Block 3Pre: H( )Trans: H( )Block 0Trans: H( )Pre: H( )Trans: H( )Block 1Block nowPre: H( )Trans: H( )Pre: H( )Trans: H( )Block 2Merkle RootH ABCDHash(H AB +H CD )H ABHash(H A +H B )H CDHash(H C +H D )H AHash(Transaction A)H BHash(Transaction B)H CHash(Transaction C)H DHash(Transaction D)Block 3…Pre: H( )Trans: H( )Block 0Trans: H( )Pre: H( )Trans: H( )Block 1Block nowPre: H( )Trans: H( )Pre: H( )Trans: H( )Block 2Featur esMerkle trees are used in bitcoin to summarize all the transactions in a block. Each leaf node represents a transaction informationA merkle tree is constructed byrecursively hashing pairs of nodes until there is only one hash, called merkle root .Any change in leaf nodes will result different merkle rootThe verified transaction is configured into a blockThe block is added tothe blockchainTransaction accomplished…TransThe transaction isBitcoin miners devote CPU power to code hashes that bundle time-stamped transactions together into a block .China Dominates In Bitcoin Mining(2017.Nov)The bitcoin network produces more than 11 EH/s = 11*1024 PH/sconsumes roughly more than 790,000KW/hHashrate(i.e. H): 1018Hash/s Bitcoin HashrateHow to reach the consensus? New block Independent verification of each transaction, by every full node, based on a comprehensive list of criteriaThe mining node packages the transaction record into aBy completing the verification of the algorithmTraditional payment systemsthe c node in the green camp first discovered a new block C, the entire networkmining poolsmining poolsExample1.Attacker Bob purchases a beautiful triptych painting for $250,000 in bitcoin from Alice.OutlinesThe backgroundswhat is the bitcoinThe birth of bitcoinThe development of bitcoinHow bitcoin works?WalletsTransactionMining and consensusChallengesThe BlockchainSmart contracts open up the potential for creating a series of self-enforcing contractual mechanisms.Public blockchain Private blockchain Fully decentralizedThe global consortium of major banks and financial institutions looking to tap into block chain technology and headed by New Y ork-based technology firm R3has five more banks joining the ranks, bringing to more than 30 global banks.The hype surrounding blockchain isreaching a feverpitchBlockchain is getting their attenionArvind Narayanan—Princeton Pramod Viswanath- UIUCLeandros T assiulas- YaleBlockchain is penetrating into a wide range of research area……。
Lab6
Teaching Assistant
April1,2014
1Installation
1.1procedure
The procedure is as follows:
1.install jdk
2.configure jdk
3.install Android SDK
4.install eclipse+ADT
5.test
1.2version of software
You’d better use the latest version of the softwares in the above subsection.
2Scores
The scores are made up of2parts:your report and the program you write.You must submit your report and program together.I will check every program.If anyone copies a program form the internet or a classmate,you get0point in this experiment.
2.1for Freshmen(first grade)
You need to show”hello world!”asfigure1in an android virtual machine,which provides you with90points of this experiment.
Figure1:example
Those who show something else(something interesting,like”Your video of building android environment is funny!”)in an android virtual machine will get100points of this experiment.
2.2for junior students(third grade)
You need to show”hello world!”asfigure1in an android virtual machine,which provides you with80points of this experiment.Then I prepare6interesting examples of android programs:
AndroidWeatherForecast:giving a weather forecast
Contact:establishing contact list
DrawLineSample:draw a line
EX0302:landing
groupMessage:group messaging
TinyDialer:giving a call
Does it sound interesting?what you need to do is to make some changes to one of the programs and achieve something new.Find your creativity and imagination and give me a surprise!Those who do this job will get100points.In addition,those who make excellent work in this part of experiment will get a bonus points(1point for good,3points for excellent and Dr.Wang may give you more than5bonus points if you excite him!)。