电力系统在台稳定计算式电力系统不正常运行方式的一种计算。它的任务是已知电力系统某一正常运行状态和受到某种扰动，计算电力系统所有发电机能否同步运行 1运行说明： 请输入初始功率S0，形如a+bi 请输入无限大系统母线电压V0 请输入系统等值电抗矩阵B 矩阵B有以下元素组成的行矩阵 1正常运行时的系统直轴等值电抗Xd 2故障运行时的系统直轴等值电抗X d 3故障切除后的系统直轴等值电抗 请输入惯性时间常数Tj 请输入时段数N 请输入哪个时段发生故障Ni 请输入每时段间隔的时间dt
上传时间： 2015-06-13
上传用户：it男一枚
上下文无关文法（Context-Free Grammar, CFG）是一个4元组G=(V, T, S, P)，其中，V和T是不相交的有限集，S∈V，P是一组有限的产生式规则集，形如A→α，其中A∈V，且α∈(V∪T)*。V的元素称为非终结符，T的元素称为终结符，S是一个特殊的非终结符，称为文法开始符。 设G=(V, T, S, P)是一个CFG，则G产生的语言是所有可由G产生的字符串组成的集合，即L(G)={x∈T* | Sx}。一个语言L是上下文无关语言（Context-Free Language, CFL），当且仅当存在一个CFG G，使得L=L(G)。 *⇒ 例如，设文法G：S→AB A→aA|a B→bB|b 则L(G)={a^nb^m | n,m>=1} 其中非终结符都是大写字母，开始符都是S，终结符都是小写字母。
标签： Context-Free Grammar CFG
上传时间： 2013-12-10
上传用户：gaojiao1999
check all，in vb,for hotel
上传时间： 2015-11-01
上传用户：hxy200501
一:需求分析 1. 问题描述 魔王总是使用自己的一种非常精练而抽象的语言讲话,没人能听懂,但他的语言是可逐步解释成人能听懂的语言,因为他的语言是由以下两种形式的规则由人的语言逐步抽象上去的: ----------------------------------------------------------- (1) a---> (B1)(B2)....(Bm) (2)[(op1)(p2)...(pn)]---->[o(pn)][o(p(n-1))].....[o(p1)o] ----------------------------------------------------------- 在这两种形式中,从左到右均表示解释.试写一个魔王语言的解释系统,把 他的话解释成人能听得懂的话. 2. 基本要求: 用下述两条具体规则和上述规则形式(2)实现.设大写字母表示魔王语言的词汇 小写字母表示人的语言的词汇 希腊字母表示可以用大写字母或小写字母代换的变量.魔王语言可含人的词汇. (1) B --> tAdA (2) A --> sae 3. 测试数据: B(ehnxgz)B 解释成 tsaedsaeezegexenehetsaedsae若将小写字母与汉字建立下表所示的对应关系,则魔王说的话是:"天上一只鹅地上一只鹅鹅追鹅赶鹅下鹅蛋鹅恨鹅天上一只鹅地上一只鹅". | t | d | s | a | e | z | g | x | n | h | | 天 | 地 | 上 | 一只| 鹅 | 追 | 赶 | 下 | 蛋 | 恨 |
上传时间： 2014-12-02
上传用户：jkhjkh1982
CFlowchartEditor is an extension of CDiagramEditor. CDiagramEditor is a vector editor, with a CWnd-derived window (CDiagramEditor), a data container (CDiagramEntityContainer) holding the draw-objects, undo stack and managing copy and paste, and objects derived from CDiagramEntity representing objects drawn on screen. CDiagramEditor lacks one feature (that is difficult to implement in both simple and general fashion) - links. Manually maintaining links in a - for example - flowchart or network topography map is unwieldy. Therefore, I ve created a reference implementation for one way of adding this functionality.
标签： CDiagramEditor CFlowchartEditor extension CWnd-d
上传时间： 2015-11-21
上传用户：气温达上千万的
Wiley出版，共20章，大小为12M 1.Introduction to the Series 60 Platform 2.Overview of the Series 60 Platform 3.Design Patterns for Application Development 4.Software Development on the Series 60 Platform 5.Platform Architecture 6.User-centered Design for Series 60 Applications 7.Testing Software 8.Application Framework 9.Standard Panes and Application Windows 10.Lists and List Types 11.Other User Interface Components 12.View Architecture 13.Audio 14.Customizing the Series 60 Platform 15.Communications Architecture 16.Communications Application Programming Interface 17.Messaging 18.Connectivity 19.Programming in Java for Smartphones 20.Midlet User Interface Framework
标签： Wiley
上传时间： 2013-12-23
上传用户：zgu489
Many of the designations used by manufacturers and sellers to distinguish their products are claimed as trademarks. Where those designations appear in this book and Addison Wesley Longman Inc., was aware of a trademark claim, the designations have been printed in initial caps or all caps. The authors and publisher have taken care in the preparation of this book, but make no expressed or implied warranty of any kind and assume no responsibility for errors or omissions. No liability is assumed for incidental or consequential damages in connection with or arising out of the use of the information or programs contained herein. The publisher offers discounts on this book when ordered in quantity for special sales. For more information, please contact:
标签： manufacturers designations distinguish products
上传时间： 2017-01-23
上传用户：woshiayin
I was trying to develope a programme to make a slide show of all the pictures of a folder using vb.net. I have spent lot of time in net for searching this but all in vain, I didn t get a simple programme to solve the same and lastly I gave myself a try for the same and developed the code, I have used there a folderbrowserdialogue and a timer with a picture box control and in coding I have used IO name spaces to get the pathe and folder info here is the code. Enjoy Subhankar
标签： programme develope pictures trying
上传时间： 2017-04-24
上传用户：a3318966
C280x C/C++ Header Files and Peripheral Examples The DSP28xx C/C++ peripheral header files and example projects files facilitate writing C/C++ Code for the TI鈥檚 28xx MCUs. The code can be used as a learning tool or as the basis for a development platform depending on the current needs of the user. We suggest that you immediately download these header files in order for an easier transition to understanding the 28xx peripherals.
标签： Peripheral peripheral and Examples
上传时间： 2014-01-24
上传用户：fandeshun
将魔王的语言抽象为人类的语言：魔王语言由以下两种规则由人的语言逐步抽象上去的：α-〉β1β2β3…βm ；θδ1δ2…-〉θδnθδn-1…θδ1 设大写字母表示魔王的语言，小写字母表示人的语言B-〉tAdA，A-〉sae，eg：B(ehnxgz)B解释为tsaedsaeezegexenehetsaedsae对应的话是：“天上一只鹅地上一只鹅鹅追鹅赶鹅下鹅蛋鹅恨鹅天上一只鹅地上一只鹅”。(t-天d-地s-上a-一只e-鹅z-追g-赶x-下n-蛋h-恨)
上传时间： 2013-12-19
上传用户：aix008
