定义：一个块模型是由如下两项组成的：（1）把一个网络中的各个行动者按照一定标准 分成几个离散的子集，称这些子集为“位置”，也可称之为“聚类”、“块”（参见Wasserman and Faust，1994：350；White，Boorman and Breiger，1976：769）；（2）考察每个位置之间 是否存在关系。 这样看来，一个块模型就是一种模型，或者一种关于多元关系网络的假设。它提供的信 息是关于各个位置或者各个子群（而不是每个行动者）之间的关系，因而研究的是网络的总 体特点（White, Boorman, and Breiger，1976）。 每个“块”（block）（即 klrb ）实际上对应的是初始矩阵的一个子矩阵。如果某块中所有 值（对角线除外）都是 1，称之为 1-块；如果都为 0，称之为 0-块。 总之，一个块模型就是对一元关系或者多元关系（包括二值关系以及多值关系）网络的 一种简化表示，它代表的是该网络的总体结构。每个位置中的各个行动者相互之间都具有结 构对等性。例如，位置 BK中的所有行动者与 Bl中的所有行动者之间的关系都类似。因此， 块模型是在位置层次上的研究，而不是在个体层次上的研究（参见 Wasserman and Faust， 1994：394~340；Burt，1976：93~122）。 关于块模型的构建和对块模型的解释，请参见拙作（2006）。我们专门设一章探讨块模 型，此处不再赘述。 三、LS集合 如果既考虑到子群内部关系的频次，也考虑到子群的成员向子群外发出关系的频次的 话，就可以得到一个新的子群概念，这就是 LS集合。 （一）LS集合的含义 赛德曼（Seidman, 1983a，转引自Wasserman and Faust, 1994: 268）把 LS集合界定为： “在一个社会网络中，如果存在满足如下条件的一个点集 S，则称该点集为 LS 集合： 如果该点集内的每个真子集合中存在的到‘该真子集合在 S中的补集’的关系都多于该真子

这是 NetFlowAnalyzer 的单机版，不像那些分布版、企业版，这个只需要一个虚拟机就可以工作了，已带许可文件。这是第二部分，包含32、64位。总共有两部分。

这是 NetFlowAnalyzer 的单机版，不像那些分布版、企业版，这个只需要一个虚拟机就可以工作了，已带许可文件。这是第一部分，包含32、64位。总共有两部分。

Essential C# 5.0 is a well-organized, no-fluff guide to the latest versions of C# for programmers at all levels of C# experience. Fully updated to reflect new features and programming patterns introduced with C# 5.0 and .NET 4.5, this guide shows you how to write C# code that is simple, powerful, robust, secure, and maintainable. Microsoft MVP Mark Michaelis and C# principal developer Eric Lippert provide comprehensive coverage of the entire language, offering a complete foundation for effective software development. The authors illustrate key constructs with succinct, downloadable code examples. Graphical mind maps at the beginning of each chapter outline the material that is covered and how individual topics interrelate. This edition also includes C# Coding Guidelines that call attention to today's best practices for writing C# code. Separate indexes of C# versions 3.0, 4.0, and 5.0 make it easy to find answers specific to whatever version of C# you are using. Throughout, topics intended for beginners and advanced readers are clearly marked. If you're new to C#, this guide will help you start writing significant code quickly. If you're an experienced C# developer, you'll gain insight into today's most complex programming challenges and techniques as you master key C# 5.0 innovations such as async/await pattern. No matter how advanced your skills become, you'll come to rely on this indispensable reference. Coverage includes * Mastering C# data types, operators, control flow, methods, and parameters* Making the most of C# object-oriented constructs, including classes, inheritance, interfaces, and more* Building reliable, effective exception handling into your code* Using generics, delegates, Lambda expressions, and events to reduce code complexity* Learning dynamic programming with reflection and attributes* Querying virtually any type of data using LINQ with Query Expressions* Creating custom collections that operate against business objects* Understanding the Common Language Infrastructure and C# in the context of the .NET 4.5 development platform* Taking advantage of declarative programming, embedded metadata, reflection, and attributes* Thoroughly mastering multithreading and synchronization, including the new async/await paradigm* Discussion of WinRT and programming in C# for Windows 8* Using P/Invoke, pointers, and direct memory manipulation to interoperate with code in other languages* Understanding how C# programs relate to the underlying runtime

This book is intended to be a concise reference to the Python programming language. Although an experienced programmer will probably be able to learn Python from this book, it’s not intended to be an extended tutorial or a treatise on how to program. Rather, the goal is to present the core Python language, and the most essential parts of the Python library in a manner that’s accurate and concise.This book assumes that the reader has prior programming experience with Python or another language such as C or Java. In addition, a general familiarity with systems programming topics (for example, basic operating system concepts and network programming) may be useful in understanding certain parts of the library reference.

mit公开课程2004秋季課程：Essential Coding Theory, Fall 2004--NEW--6-895Fall-2004，from lecture01 to lecture 23,

Mysql服务安装的资源包

mysql-essential-5.0.67-win32.msi

里面有直接采用c++一步一步计算orb特征的过程，可以帮助理解如何计算orb特征，还有slam中如何将计算得到的本征矩阵分解为旋转矩阵和平移向量。

特效 风，水，影，自然，魔法，神圣，冰霜，火，大地，黑暗，奥术。 3D粒子系统。