Description: 向量空间模型 c源码实现
利用向量空间模型的概念，这个可以用在crawer中.-Vector Space Model c source code to achieve the use of the concept of vector space model, this can be used in in crawer. Platform: |
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Author:lhs |
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Description: 本书第二版和第三版之间的变化非常大其中最值得注意的是C++已经通过了国际标
准化这不但为语言增加了新的特性比如异常处理运行时刻类型识别RTTI 名字空
间内置布尔数据类型新的强制转换方式而且还大量修改并扩展了现有的特性比如模
板template 支持面向对象object-oriented 和基于对象object-based 程序设计所需
要的类class 机制嵌套类型以及重载函数的解析机制也许更重要的是一个覆盖面非
常广阔的库现在成了标准C++的一部分其中包括以前称为STL 标准模板库的内容新
的string 类型一组顺序和关联容器类型比如vector list map 和set 以及在这些类型
上进行操作的一组可扩展的泛型算法generic algorithm 都是这个新标准库的特性本书
不但包括了许多新的资料而且还阐述了怎样在C++中进行程序设计的新的思考方法简而
言之实际上不但C++已经被重新创造本书第三版也是如此-econd edition and third edition of the book vary greatly among the most noteworthy of which is C has passed the international standards
This standardization not only added a new language features such as exception handling run-time type identification RTTI name space
Boolean data type built between the new cast but also a lot of ways to modify and extend the existing features such as model
Board template support object-oriented object-oriented and object-based object-based programming required
Nested class mechanism to class types and overloaded functions resolution mechanism may be more important, a non-coverage
Often broad standard C library is now a part of which includes previously known as the contents of the Standard Template Library STL New
The string type of a set of container types such order and the associated vector list map and set well in these classes
Type
Operate on a set of generic algorithms and scalable generic algorithm are the new features of the standard li Platform: |
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Author:xxw |
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Description: VSM.rar - 向量空间模型 c源码实现利用向量空间模型的概念，这个可以用在crawer中。-Vector Space Model c source code to achieve the use of the concept of vector space model, this can be used in in crawer. Platform: |
Size: 3072 |
Author:nbayang |
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Description: IAU 的标准基本天文程序库SOFA 给出Fortran 版和C 版两个基本天文运算的库函数，最新版SOFA 补充了IAU 在2006 年公布的岁差模型。SOFA 由两部分组成：天文库和矢量、矩阵运算库。其中前者有109 个子程序，可以进行天文历法计算、时间计算、星历表计算、岁差章动计算、恒星空间运动计算和主要星表系统的转换，后者有52 个子程序，功能则是矢量和矩阵的各种操作，当然其中包括了球面坐标系统的变换-IAU standard basic astronomical library SOFA Fortran and C version gives two basic astronomical arithmetic library functions, the latest version of the SOFA supplement published in 2006 IAU precession model. SOFA consists of two parts: day library and vector, matrix arithmetic library. There are 109 sub-programs in which the former can be astronomical calendar calculations, calculation of time, ephemeris calculations NUTATION calculated stellar space motion calculation and conversion of major star catalog system, which has 52 sub-program, function is the vector sum a variety of matrix operations, of course, which includes the spherical coordinate system transformation Platform: |
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Author:抄书 |
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Description: 研 究永磁 同步 电机 (P M SM )直 接 转 矩控制 (D T C ) 系统 。针 对传 统控 制 系统 中存 在 的 转 矩和 磁 链 脉 动 大 的 问题 ， 将 空 间 矢 量 调 制 (S V M ) 引入PM SM —D T C 系统 。通 过 对 永 磁 同 步 电机 数 学模型及 空 间 电 压 矢 量 调 制 算 法 的 分 析 ， 在 M atlab／Sim ulin k 环 境 下 ， 对 P M S M 的 S V M —D T C 系 统 进行仿 真 。仿 真 结果 表 明 ． 系统模 型具 有 很好 的 动静
态性能 。- In this paper， permanent magnet syn—
chronous motor ( PMSM ) direct torque contro1( DTC ) system was studied ．For inhibiting the rip
pie of torque and flux link age of traditional co ntrol
s y ste m s ， th e P M S M —D T C sy stem w a s co m b in e d
w ith the space vector modulation (SVM )． Based on
the study with the mathematical model of PMSM and SVM， and simulated the system in Matlab／Simulink．The system model has been proved reasonab le and effective with good dynamic and static performance． Platform: |
Size: 241664 |
Author:yangyang |
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Description: 设计要求：试设计一个演示程序（可以采用任何语言编写，建议使GUI工具构建演示程序），该程序运行后能显示一个人机交互界面，该界面允许输入系统状态空间模型的参数矩阵（即可输入A,B,C,D矩阵，以构建系统的状态空间模型），根据输入的参数矩阵，能够给出系统是否能控的结论。若系统能控，则允许输入任意初始状态向量和控制作用的持续时间（即给定系统状态达到零状态的时间长度），能自动构建控制作用，使系统的状态变成零状态，系统状态从给定状态变成零状态的过程采用图形的方式展示。-
Design requirements: try to design a demonstration program (written in any language can be used, it is recommended to make GUI tool for building demonstration program), after running the program can display a human-machine interface, the interface allows parameter matrix input state space model (to enter the a, B, C, D matrix, to construct the system state space model), based on the input parameter matrix, can give conclusions whether the system can be controlled. If the system can control, then allows you to enter the duration of an arbitrary initial state vector and control action (ie a given system state reaches zero the length of time), can automatically build control effect, so that the system state to the zero state, the system state given state to the zero state process using graphically show. Platform: |
Size: 11264 |
Author:闫思蒙 |
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Description: 为研究电压源型逆变器供 电的六相感应电动机调速 系统的性能，在 六相感应 电动机 A —— C
坐标 系动态数学模型的基础上 ，通过坐标 变换得到六相感应 电动机在 d— q 坐标 系下的动态数 学模
型 ；采 用空 间矢量脉 宽调制 (Space V ector Pulse W idth M odulation ， SV PW M ) 技 术 对 六相 电压 源 型逆
变器进行 调制 ．在 M ATLAB／ sIM u LIN K 环境 下 ，构 建 SV PW M 电压 源型逆 变 器供 电的六相 感应 电动
机调速 系统的仿真模型 ，进行调速 系统起动和制动的动 态仿真．仿真结果表明，系统的转矩脉动小，
定子电流谐波小，具有较好的动态性能和稳 态性能-To study the performance of the voltage source inverter-powered six-phase induction motor speed control system, six-phase induction motor A- C coordinates based on a dynamic mathematical model to obtain a six-phase induction motor in d- q coordinate transformation dynamic mathematical model coordinate system using space vector pulse width modulation (space V ector pulse W idth M odulation, SV PW M) technology for six-phase voltage source inverter modulation. In M ATLAB/sIM u under LIN K environment, to build simulation models SV PW M voltage source inverter-fed six-phase induction motor speed control system for speed and dynamic simulation system start braking. Simulation results show that the system torque ripple small, stator current harmonics, has a good dynamic performance and steady performance Platform: |
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Author:q |
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