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MQTT与TCP的区别 - 创客硬件开发 - 清泛IT社区，为创新赋能！
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2009年MQTT协议诞生10周年生日发明起因TCP协议和MQTT协议的设计都与卫星通信有着直接的联系。1972年时，Kahn在IPTO公司参与了一个卫星通信网络项目，他就搞了个子项目来搭建卫星基站的无线电数据包通信网络。通过这个项目的经...
Download and open PDF file using Ajax
I have an action class that generates a PDF. The contentType is set appropriately.
15 Answers
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初创公司如何利用社交媒体实现营销效果最大化？ - 资讯 - 清泛网 - 专注C/C...
...些工具和窍门，帮助你的公司有效管理社交媒体。
一、设计一个易于管理的社交媒体战略
在尝试进入社交媒体营销领域，并且在每个社交媒体渠道上注册账户之前，首先要评估一下自己的能力，不妨来看看下面这几类：
l 每...
Python module for converting PDF to text [closed]
Is there any python module to convert PDF files into text? I tried one piece of code found in Activestate which uses pypdf but the text generated had no space between and was of no use.
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福昕软件成功收购德国公司LuraTech - 资讯 - 清泛网 - 专注C/C++及内核技术
...LuraTech这两大IT界的著名品牌。此外，福昕在整合LuraTech的PDF技术后，其PDF生态环境将得到进一步完善，不管是在PDF的压缩，还是PDF标准文档的创建方面都将得到极大的提高，用户需求也将得到更大的满足。
LuraTech总部位于德国...
C++特化模板函数的符号多重定义错误问题 - C/C++ - 清泛网 - 专注C/C++及内核技术
...: -1;
}
该模板根据地一个参数是否等于、大于、或小于第二个参数而分别返回零或+/-1。它是典型的用于集合排序时的排序函数。它假设类型 T 具备 operator== 和 operator> 操作，并支持 int，float，double 或 DWORD 类型。但它不能应用...
How do I put a variable inside a string?
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plot.savefig('hanning(%d).pdf' % num)
The % operator, when following a string, allows you to insert values into that string via format codes (the %d in this case). For more details, see the Python documentation:
https://docs.python.org/3/library/st...
Which one is the best PDF-API for PHP? [closed]
Which one of these is the best PDF-API for PHP?
9 Answers
9
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How to extract text from a PDF? [closed]
...n anyone recommend a library/API for extracting the text and images from a PDF?
We need to be able to get at text that is contained in pre-known regions of the document, so the API will need to give us positional information of each element on the page.
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Minimizing NExpectation for a custom distribution in Mathematica
...tion compute the expected value.
For the expected value, we only need the PDF of your distribution. Let's extract it from your definition above into simple functions:
pdf[a_, b_, m_, s_, x_] := (1/(2*(a + b)))*a*b*
(E^(a*(m + (a*s^2)/2 - x))*Erfc[(m + a*s^2 - x)/(Sqrt[2]*s)] +
E^(b*(-m + ...