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App Inventor 2 低功耗蓝牙(BLE) 硬件接入、数据通信及IO控制 - App Invent...

...口工具。什么是串口工具?串口工具一般是一款电脑上的软件,配合UART线,可以与硬件进行双向数据传输的工具,UART线如下:电脑端的串口工具软件非常之多,查看原文链接下载。请注意:使用串口工具软件之前,一般需要安...
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LINGO使用指南 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...2<=600; 然后点击工具条上的按钮 即可。 例1.2 使用LINGO软件计算6个发点8个收点的最小费用运输问题。产销单位运价如下表。 销地 产地 B1 B2 B3 B4 B5 B6 B7 B8 产量...
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How to resolve “Waiting for Debugger” message?

I have HTC Comet connected to Eclipse with SDK 2.2. I do a debug build - the application does not run; though it does get installed on the device. On the device I get this message box on the Comet screen ...
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创业者:在寻找 不迷茫 - 资讯 - 清泛网 - 专注C/C++及内核技术

...8万,他大呼承受不起。 “现在投资人选项目书都开始用软件选择了。”杨贝明说。据他观察,项目书太多,投资人通过软件设定,直接屏蔽掉他们不喜欢的。另外,来中关村创业大街找项目的真正投资人也已经不多了,大多数...
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When is it appropriate to use UDP instead of TCP? [closed]

...nt your own protocol for reliability or to resend. DNS is the perfect description of this use case. The costs of connection setups are way too high (yet, DNS does support a TCP mode as well). Another case is when you are delivering data that can be lost because newer data coming in will replace tha...
https://www.tsingfun.com/it/bigdata_ai/341.html 

搭建高可用mongodb集群(二)—— 副本集 - 大数据 & AI - 清泛网 - 专注C/...

...节点读取数据; nearest:不管是主节点、secondary节点,从网络延迟最低的节点上读取数据。 好,读写分离做好我们可以数据分流,减轻压力解决了“主节点的读写压力过大如何解决?”这个问题。不过当我们的副本节点增多时,...
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Stopping scripters from slamming your website

...shop, the subsidiary of Woot that does the design, writes the product descriptions, podcasts, blog posts, and moderates the forums. I work with CSS/HTML and am only barely familiar with other technologies. I work closely with the developers and have talked through all of the answers here (and many o...
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Recommended way to get hostname in Java

... is the name of your computer. Any attempt to determine the hostname by an IP address like this InetAddress.getLocalHost().getHostName() is bound to fail in some circumstances: The IP address might not resolve into any name. Bad DNS setup, bad system setup or bad provider setup may be the reason f...
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腾讯Tencent开源框架介绍(持续更新) - 开源 & Github - 清泛网 - 专注C/C++及内核技术

...入框架,支持iOS, macOS和Android。 Matrix 通过接入各种性能监控方案,对性能监控项的异常数据进行采集和分析,输出相应的问题分析、定位与优化建议,从而帮助开发者开发出更高质量的应用。当前工具监控范围包括:崩溃、卡...
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mongo - couldn't connect to server 127.0.0.1:27017

...o the mongod server. This could be because the address was wrong (host or IP) or that it was not running. One thing to note is the log trace provided does not cover the "Fri Nov 9 16:44:06" of your mongo timestamp. Can you: Provide the command line arguments (if any) used to start your mongod p...