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a72n的参数摘要：一、a72n参数简介1.a72n是什么2.a72n参数的含义二、a72n参数详解1.处理器核心2.主频3.GPU4.内存5.存储空间6.电池容量7.摄像头8.屏幕9.系统与网络三、a72n参数优势与不足1.优势a.处理器性能b.GPU性能c.内存与存储空间d.电池续航e.摄像头表现f.屏幕显示效果g.系统与网络速度2.不足a.价格b.兼容性问题c.软件优化d.维修与保养四、a72n参数适用人群1.游戏爱好者2.影音娱乐用户3.日常办公与学习用户4.专业领域用户正文：【a72n参数简介】a72n是一款具有强大性能的电子产品，其参数包括处理器核心、主频、GPU、内存、存储空间、电池容量、摄像头、屏幕、系统与网络等方面。
这些参数共同决定了a72n的性能表现，用户可以根据自己的需求选择合适的参数配置。
【a72n参数详解】1.处理器核心：a72n采用先进的处理器核心架构，可实现高速运行与低功耗的完美平衡，为用户带来流畅的使用体验。
2.主频：a72n具备高主频，能够快速处理任务，减少等待时间。
3.GPU：a72n搭载了高性能的GPU，可轻松应对大型游戏与高清视频播放等图形处理需求。
4.内存：a72n配备了大内存，能够满足多任务处理与大型应用的运行需求。
5.存储空间：a72n提供了多种存储空间选择，用户可以根据自己的需求选择合适的存储空间。
6.电池容量：a72n拥有大容量电池，可实现长时间的续航，满足用户日常使用需求。
7.摄像头：a72n具备高像素的摄像头，可拍摄清晰的照片与视频。
8.屏幕：a72n采用了高分辨率的屏幕，可呈现细腻的画质与鲜艳的色彩。
9.系统与网络：a72n搭载了快速稳定的操作系统，并支持高速网络，让用户享受流畅的网络体验。
【a72n参数优势与不足】1.优势：a72n在处理器性能、GPU性能、内存与存储空间、电池续航、摄像头表现、屏幕显示效果、系统与网络速度等方面具有明显优势，可满足用户对于高性能电子产品的需求。
最新电大《网络多媒体素材加工》机考网考纸考题库及答案本人针对该科目汇总了该科所有的题，形成一个完整的题库，并且每年都在更新。
该题库对考生的复习、作业和考试起着非常重要的作用，会给您节省大量的时间。
做考题时，利用本文档中的查找工具，把考题中的关键字输到查找工具的查找内容框内，就可迅速查找到该题答案。
题库一一、单项选择题(每题2 分，共20分)1 ．下列文件格式中，属于视频文件格式的是( ) 。
A ．RTFB ．MPEGC ．JPGD ．WAV2 ．下面应用软件用于音频编辑的是( ) 。
A. Adobe PhotoshopB.Macromedia FireworksC. Cool Edit ProD.Adobe Premiere Pro3 ．在Photoshop CS 中，关于图层样式叙述正确的是( ) 。
A ．图层样式可以被复制、缩放、删除或隐藏B ．图层样式不能被复制，但可以被删除或被隐藏C ．图层样式可以被复制，但不能被缩放、删除或隐藏D ．图层样式可以被复制、缩放，但不能被隐藏4 ．在Photoshop CS2 中图层有5 种类型，它们是( ') 。
A ．普通图层、背景图层、文字图层、形状图层、图像图层B ．普通图层、背景图层、文字图层、形状图层、填充C ．普通图层、背景图层、文字图层、形状图层、填充／调整图层D ．普通图层、背景图层、文字图层、形状图层、调整图层5 ．Fireworks 制作动画过程中，如果当前帧的内容与前面某一帧的内容相同，可以采用的操作是( ) 。
A ．复制帧B ．帧重制C ．重制帧D ．克隆6 ．在Cool Edit Pr0 2.1 的“多轨界面”中，“翻ri ”按钮的作用是( ) 。
A ．多轨播放B ．单轨播放C ．音量调节D ．静音设置7 ．下列文件中不属于音频文件格式的是( ) 。
A . WAV文件B . WM文件C．RA 文件D．AVI 文件8．在Flash 8中，能在舞台上为其添加行为的对象是( ) 。
懒得买CD？试试网播吧——先锋N70A使用报告笔者作为一名CD音源的忠实用户，对于网播（香港那边称之为网路数位流播放器）一直有一些执念，一名发烧友，单纯的只靠cd碟片这一种声音载体去满足大量的音乐需求其成本还是非常可怕的，而且有时候只是一时兴起的想听一些制作相对粗糙的口水歌，为此去特意买张CD碟也是没啥意义。
至于PCFI呢，个人还是没有信心能够玩好，PCFI系统为了达成声音的高纯净度还是需要花大工夫的，而且在客厅使用音箱时，距离较远，每次跑过去捣鼓电脑显然是不够优雅，于是操作基于手机和平板的网播成为了CD音源的完美替补，相信许多选择网播作为音源的朋友都是这么想的，极高的便利性和随意性成为网播的一大优势。
（机器较大，拍摄不方便，本文图片均来自网络）说到网播呢，国内的声韵和享声两家都是这方面的老手，英国的LINN可以说是这方面的祖师爷级别的，德国的柏林之声更是有B111这种HIEND级别的怪物，除去这些老牌的厂商，还有韩国Aurender这种新兴厂家，而且价格不菲，日本方面马兰士也是做过不少网播类产品，而先锋也是一直在做，还形成了产品线，从N30，N50，一直到最新一代的N70。
在做了大量的功课后，我还是最终选择了先锋N-70A作为我的替补流媒体音源。
东西到手后，第一感觉是沉，秉承了日系HIFI设备的用料足傻大沉的特点，一个网播也做的个头那么大那么沉，当然了，这也意味着用料足，论开盖日系设备是从来不虚谁的，可以看见N70内部的格局非常特别，用了三分割结构，意图也很明显，是为了最大程度的减少各个模块之间的干扰，这一点非常重要，为什么PCFI或者一些流媒体系统的声音不够干净，让人感觉声音很燥很脏，屏蔽功夫没做到位就是一大原因，先锋显然是很清楚屏蔽对于一台高集成度的多功能网播意味着什么，所以不计用料成本的将三个模块用隔板彻底隔开，甚至还将电源用铜制的小黑盒进行了密封，就其售价来说，算是将屏蔽功夫做到家了。
一、介绍Cortex-A7是英特尔公司于2012年推出的一款低功耗、高性能的处理器核。
作为Cortex-A系列处理器的一员，Cortex-A7采用了ARMv7指令集架构，具有双发射、乱序执行等先进的微架构特性，适合用于智能手机、平板电脑、物联网设备等低功耗场景。
二、架构1. 流水线Cortex-A7采用了8级流水线，可以充分利用指令级并行，提高处理器性能。
流水线的深度也是一种折衷，需要在性能和功耗之间进行平衡考量。
2. 缓存体系Cortex-A7内置了L1指令缓存和数据缓存，分别为32KB，具有良好的命中率和低延迟。
Cortex-A7还支持L2缓存，可以进一步提高数据访问效率。
3. 浮点运算Cortex-A7内置NEON浮点单元，支持高效的SIMD指令集，能够加速多媒体处理和信号处理等应用。
4. 内存管理Cortex-A7支持32位虚拟位置区域和32位物理位置区域，具有灵活的内存管理单元，能够满足多种操作系统和应用程序的需求。
三、功耗优化1. big.LITTLE架构Cortex-A7可以与Cortex-A15等高性能处理器核组成big.LITTLE架构，能够在保证性能的同时降低功耗。
通过动态调度，系统可以根据负载情况灵活地选择使用哪个处理器核，实现优化性能和功耗的平衡。
2. 睡眠状态Cortex-A7支持多种睡眠状态，包括快速睡眠、深度睡眠等，能够在不需要处理器运行时降低功耗，延长电池续航时间。
3. 功耗管理单元Cortex-A7具有专门的功耗管理单元，可以监控处理器的功耗情况，采取相应的策略，降低功耗的同时尽量不影响性能。
四、性能特征1. 频率调节Cortex-A7的频率可以根据负载情况动态调节，最高可达1.5GHz，在高负载时提供足够的性能，而在轻负载时降低频率，减少功耗。
2. 性能分析Cortex-A7内置了性能分析单元，可以实时监测处理器性能，帮助开发者找到性能瓶颈，并优化应用程序，提高整体系统性能。
联发科MTK芯片型号资料目录：使用浏览器打开，点击型号即可下拉MT2503MT6737MT6735MT8176MT6580MT6572MT6753 MT8735MT6758MT8163MT6750MT6582MT6261MT2502 MT7623MT8783MT6797MT7628MT7662MT6755MT2601 MT6757MT6570MT7601MT7688MT8321MT2523MT7687 MT6592MT2511MT6732MT5931MT2625MT6752MT2533 MT6799MT6738MT5596MT6260MT8382MT8693MT8127 MT7621MT8173MT6589MT7620MT6280MT6571MT5505 MT2501MT7615MT7603MT6795MT6575MT6595MT8685 MT7681RT5572MT3333MT6516MT6328MT3332MT6577 MT6573MT5580RT3573MT7697MT3303RT5370MT8580MT3339 MT8312MT1389MT5592RT3593MT1887MT3337MT8502 MT6513MT8516MT5398MT1865RT3062MT6225MT1398RT3562 MT6276MT5561MT7610RT3070MT6588MT1862MT6290MT1959RT5592MT7612MT6169RT3662MT6515MT5396MT6228 MT6517MT6229RT3883MT6223MT6235MT8563MT6250 MT8507MT8553MT6205MT6227MT6226MT6255MT6253 MT8389MT8665MT8392MT2503联发科技MT2503基于高度集成的超小型系统级封装，整合蓝牙3.0、多星系GNSS系统和2G基带，搭载集成内存的ARMv7微控制潜在应用领域包括具备简单应用功能的可穿戴设备、可移动的资产跟踪设备、注重安全的工业应用。
滚滚长江东逝水本手册将尽可能地提供准确的信息，但仍可能存在误差，仅供参考。
产品信息如有更新，恕不另行通知，我司不承担由此产生的责任。
千兆以太网接口，提供1Gbps 带宽，最大传输距离可到100m 128MB 板上缓存用于突发模式下数据传输或图像重传支持软件触发/硬件触发/软硬混合触发/自由运行等多种模式支持锐度、降噪、伽马校正、查找表、黑电平校正、亮度、对比度等 ISP 功能彩色相机支持插值、白平衡、颜色转换矩阵、色度、饱和度等支持多种图像数据格式输出，ROI、Binning、镜像等符合GigE Vision V2.0协议和GenICam标准兼容USB3 Vision 协议和GenICam标准符合CE，FCC，RoHS认证7000 GigE面阵工业相机（29x44x58）型号像素信噪比宽动态范围GPIO通用接口图像格式Binning Decimation ROI 增益快门曝光图像采集模式图像缓存存储通道尺寸重量供电方式功耗镜头接口温度12.29MP >38dB 70dB6芯Hirose接口：1路光耦隔离输入，1路光耦隔离输出不支持支持X1~X3248μS ~ 1S软件触发/硬件触发/自由运行64MB 板上缓存支持2组用户自定义配置保存29mm*44mm*58mm(不含镜头座和后壳接口)100gPoE供电/通过Hirose接口直流供电,电压范围6V~26V12V≈3.2W C-mount存储温度：- 30℃~+80℃；工作温度：- 30℃~+50℃Mono8，BayerRG8/10/10Packed，BayerGB8/10/10Packed，YUV422Packed不支持A7A20MG9A7A20MG9/A7A20CG9型号A7A20MG9传感器IMX304传感器类型CMOS 快门类型Global 分辨率4096x3000帧率(fps)9位深(bit)12接口GigE，PoE 颜色黑白像元(μ㎡)3.45 x3.45靶面1.1"技术参数Technology Parameter伽马范围0~4，支持LUTSPC FPN 支持不支持A7A20CG9IMX304CMOSGlobal4096x3000912GigE，PoE彩色3.45 x3.451.1"A7A20CG9Mono8/10/10Packed/12/12Packed支持单位：mmI/O接口说明I/O Interface Instruction管脚123456信号Power Line1Line2Line0IO GND GND说明+6V~26V 直流电源光耦隔离输入NA光耦隔离输出光耦隔离地直流电源地产品尺寸Product Size光谱图Spectrogram浙江华睿科技有限公司*********************浙江杭州滨江区滨安路1181号*************A7A20MG9Quantum Efficiency Curve for Mono SensorA7A20CG9Quantum Efficiency Curve for Mono and Color。
国二计算机需背知识1.把计算机分巨型机、大型机、中型机、小型机和微型机，本质上是按计算机总体规模和运算速度划分。
2.门禁系统的指纹识别功能所运用的计算机技术是模式识别。
3.区分：1.位（bit）音：比特“位”是计算机中的最小单位，它只表示一个二进制数0 00 或 1 11。
2.字节（Byte）音：拜特转化：1 B y t e = 8 b i t字节是计算机中数据处理的基本单位，用来单位存储和解释信息。
一个字节固定由8 个二进制位组成。
3.字概念：计算机进行数据处理时，一次存取加工和传送的数据长度。
转化：1 字 = n B y t e 1字=nByte1字=nByte一个字通常为字节的整数倍（即8 的整数倍）。
4.字长一个字包含的位数。
4.以下描述错误的是____。
A、计算机的字长等于一个字节的长度B、ASCII码编码长度为一个字节C、计算机文件是采用二进制形式存储D、计算机内部存储的信息是由0、1这两个数字组成的5.计算机内存和外存的区别:处理速度：内存快，外存慢。
存储容量：内存小，外存大。
断电后：内存RAM中的信息丢失，外存ROM中的信息不丢失。
内存和外存的本质区别是，一个是内部运行提供缓存和处理的功能，也可以理解为协同处理的通道；而外存主要是针对储存文件、图片、视频、文字等信息的载体，也可以理解为储存空间。
内存是计算机中重要的部件之一，它是与CPU进行沟通的桥梁。
计算机中所有程序的运行都是在内存中进行的，因此内存的性能对计算机的影响非常大。
6.内存就是一种RAM技术，而ROM则类似于硬盘技术，两者都是存储器，只是RAM的速度要远远高于ROM的速度，内存只能临时存储东西，不能长久保存，而ROM则可以存储，即使掉电后也可以找到之前存储的文件，这也就是硬盘了。
7.新硬盘在使用前，首先应经过以下几步处理：低级格式化、硬盘分区、高级格式化.8.假设显示器的分辨率为1024×768像素，每个像素点用24位真彩色显示，其显示一幅图像所需容量是_1024×768×3__个字节。
How Do You Get the Best Wi-Fi Performance?Proper Wi-Fi network setup is an important aspect of network installation. Most of our mobile and entertainment devices rely solely on Wi-Fi for Internet and streaming media services, and everyday, more products and ideas rely on the wireless medium for success. T ake a look at your kids, your colleagues, and even your parents. Everyone is consuming content wirelessly!It is imperative that a wireless network be transparent to its end users. In other words, the network just needs to work. With the Araknis™ line of wireless access points, you can be sure that the quality and performance of the products you install is business grade. We spend a lot of time testing our products so you can be confident they will work.Getting great Wi-Fi performance isn’t always easy. A large part of a successful job is you, the installer. These are the steps we recommend you follow on every install, big or small, to deliver the best wireless network possible.STEP 1 - LEARN AND USE YOUR TOOLSInvesting in wireless tools such as spectrum analyzers and heat mapping tools will make your life a lot easier. Make sure your techs are well trained on these tools and have well-established processes. Consistency is the key to a fast and professional install. This document does not cover the use of specific tools, but we like MetaGeek a lot.Metageek offers popular tools like inSSIDer, Wi-Spy + Chanalyzer, and Eye P.A. for gaining insightinto the local Wi-Fi environment and examining your network’s performance.STEP 2 - DOCUMENT EVERYTHINGEvery network is unique. How you do keep track of everything from job to job? Troubleshooting or expanding an existing network can be a real pain unless you document everything you do. The more details you capture from day one, the less time you spend rediscovering things later.If you haven’t done so, build a template to document the details of each job. You don’t need an expensive tool; the important thing is using a system and keeping it organized. Some prefer writing everything down, others love electronic solutions for improved access and portability. Do whatever works for you!Recommended Solutions• Evernote is a cloud-based note taking app that works on most devices with Internet access. The free version is sufficient for most users but paid plans with great added features are also available.• Microsoft Office users can try out OneNote (similar to Evernote), Word, or Excel. This makes moving info easier if you already use Office. Excel is great for more structured notes.• Google Drive is another great free solution. Use the Docs (word processor) or Sheets (spreadsheet) apps from anywhere on the Internet. They can even be used to open Word or Excel files.STEP 3 - CUSTOMER NEEDS AND SITE SURVEYKnow your CustomerSpend some time with your customer before the install to learn about their needs and set their expectations. Understanding expectations is essential to proper setup. Make sure to capture these pieces of information:• User types and their security needs• Coverage area and performance expectations• Types of wireless client devices in use, like computers, smart phones, media devices...• Applications that will be used on the network• Ask the customer to share floor plans if they’re available (preferably in a digital format)• Note what materials were used in constructionKnow the SiteT o provide great Wi-Fi, you need even coverage. T oo many or too few WAPs can cause equal amounts of problems, and due to interference, you can’t assume a single WAP will cover a given area. Walk around the site and look for these common trouble areas. Make notes of your findings and map them on the floor plan as you go:• Kitchen, utility rooms... any area with large electric appliances• Other wireless devices like cordless phones.• Obstacles that might block or deteriorate signal quality like metal studs, reflective glass, brick walls, etc. Next, scan the environment using your spectrum analyzer to see what channels or frequencies have interference. Scan from multiple locations, including possible trouble spots. You want a clear picture of the Wi-Fi environment around and throughout the job. Make note of existing Wi-Fi interference sources and other potential jamming signals on the floor map as you go.The image above shows MetaGeek Chanalyzer at work scanning a location for a new Wi-Fi install. The only interference we see is aboveis above the Wi-Fi spectrum.STEP 4 - PLAN ACCESS POINT LOCATIONSNow that you have a good idea of what you are getting into, go back to the floor map and decides where the access points should be installed. It’s recommended to:•Position the access points on the ceiling facing down toward clients in the most central part of the coverage area possible •Avoid natural sources of interference and signal disruption. Building materials like concrete, stucco, and metal studs can degrade signal strength.•Place access points with some overlap, but not a lot. -70dBm to -80dBm in overlap area is recommended.Cordless PhonesNanny CamsKitchen AreaMetal StudsConcrete/Brick WallsMicrowave Wireless Audio SystemCommon sources of Wi-Fi interferenceSTEP 5 - INSTALL THE ARAKNIS™ ACCESS POINTSWe designed our access points to be very installer friendly. The included mounting plate attaches to all standard junction box types and the access point snaps on without tools. Plus, standard PoE (Power over Ethernet) means one cable can be run for both network and power (PoE injector or PoE switch required). Follow the quick start guide in the box for specific installation steps.Once you have the cables for the access points installed, we highly recommend using a network analyzer to validate each run. This tool not only tells you if each connector is terminated correctly, it also tests the entire cable to be sure it’s in spec and transmitting data correctly. No more time lost searching for cable issues when something doesn’t work!STEP 6 - CLAIM IN OVRC AND CONFIGURE ACCESS POINTSWhat is OvrC?OvrC is a cloud management server that allows you to monitor, troubleshoot, and configure your Araknis devices from anywhere on the Internet through your OvrC browser or mobile app. Equipment is organized by location and you get instant notifications when network issues arise. You can change basic device settings right in the app, or use Web Connect to log into the local interface with no port forwarding required.Learn more at .Claiming Your Device in OvrCThe access point requests a DHCP IP address when it powers on, then connects to the OvrC server once an Internet connection is found. T o claim the device:1. Create or select a customer location and click + DEVICE.2. Enter the MAC address and Service T ag (ST) number (found on the bottom of the WAP and also on thebox). OvrC also scans the network for other enabled devices as you claim the first one, so you can set up an entire job in a few seconds.3. Name the device. Use a name that will help remember the device location and purpose.4. Click Save to complete the process. At this point, your device will appear in the job’s device list. Updating FirmwareAlways update the firmware (if available) before configuring your device. You will be notified in the app any time a device has new firmware available.Configuring Basic Wireless Settings in OvrCAt a minimum, you should configure the following settings before initial testing of the network. All of these settings are found on the Configure tab of the device page.1. Configure SSIDs per customer and job requirements. Use WPA2-PSK unless the requirements make youchoose another security standard.2. Configure the same SSIDs on both 2.4GHz and 5GHz radios and enable Band Steering.3. Configure the Guest Network feature (if required). Keep in mind:• The Guest Network feature is meant to be used in networks with a single access point hosting that SSID because the feature uses a separate DHCP server.• If a Guest Network is required to span across multiple access points using Fast Roaming, see the full product manual for setup instructions.Configuring Other Settings Using OvrC Web ConnectWe designed the Web Connect feature to access the full user interface from OvrC in just a few clicks. Use this feature to change settings that aren’t found on the Configure tab in OvrC. See the full product manual for detailed instructions.Default LoginUsername araknisPassword araknisSTEP 8 - TEST AND VALIDATENow that you feel comfortable about your wireless setup, start testing the performance of the network to make sure everything is working as advertised. Start by running continuous ping tests to the router while roaming around the location. Then test a couple of the applications the customer told you about so the customer is happy when they get your product. Make sure to push the limits when testing to expose any possible issues. STEP 9 - BACKUP YOUR FILESYou have done all the hard work, now make sure you document everything for future reference. Back up the configuration and log files from all of your access points. Make notes about special cases in that particular job site (each job site has one of those!). This will make your life a lot easier in the future in case the customer calls for help. And they always do.STEP 10 - SHARE WITH CUSTOMER AND CLOSEThis is an optional step, but if you want to set yourself apart, share a standard report document with your customer. Show them all the hard work and science that went into your product. Give them confidence in their choice and your abilities to deliver a phenomenal wireless network.These are the steps we recommend you get into the habit of performing on each job. No matter the size. Yes, it’s a time investment but this investment will pay off when you have fewer customer calls and a product you can stand behind.Happy Installing!。
