Just what is a regular expression, anyway? Take the tutorial to get the long answer. The short answer is that a regular expression is a compact way of describing complex patterns in texts. You can use them to search for patterns and, once found, to modify the patterns in complex ways. You can also use them to launch programmatic actions that depend on patterns. A tongue-in-cheek comment by programmers is worth thinking about: "Sometimes you have a programming problem and it seems like the best solution is to use regular expressions now you have two problems." Regular expressions are amazingly powerful and deeply expressive. That is the very reason writing them is just as error-prone as writing any other complex programming code. It is always better to solve a genuinely simple problem in a simple way when you go beyond simple, think about regular expressions. Tutorial: Using regular expressions
標簽： expression the tutorial regular
上傳時間： 2013-12-19
上傳用戶：sardinescn
模式識別學習綜述.該論文的英文參考文獻為303篇.很有可讀價值.Abstract— Classical and recent results in statistical pattern recognition and learning theory are reviewed in a two-class pattern classification setting. This basic model best illustrates intuition and analysis techniques while still containing the essential features and serving as a prototype for many applications. Topics discussed include nearest neighbor, kernel, and histogram methods, Vapnik–Chervonenkis theory, and neural networks. The presentation and the large (thogh nonexhaustive) list of references is geared to provide a useful overview of this field for both specialists and nonspecialists.
標簽： statistical Classical Abstract pattern
上傳時間： 2013-11-25
上傳用戶：www240697738
1994年，Young和Mark Ewing創建了Red Hat公司，并創造了全球使用最廣泛的Red Hat Linux套件，為Linux的普及立下了汗馬功勞，筆者也是跟隨著Red Hat的帶領下走進Linux世界的。Red Hat取得了輝煌的成績，甚至許多Linux發行公司還采用了許多Red Hat Linux的代碼，如Mandrake、SOT Best、Connectiva、Abit和Kondara。可以說，Red Hat在某種意義上幾乎成了Linux的代名詞。
標簽： 1994
上傳時間： 2016-04-10
上傳用戶：zhaiyanzhong
Here we are at the crossroads once again Youre telling me youre so confused You cant make up your mind Is this meant to be Youre asking me Trademark But only love can say - try again or walk away But I believe for you and me The sun will shine one day So Ill just play my part And pray you ll have a change of heart But I cant make you see it through Thats something only love can do Face to face and a thousand miles apart Ive tried my best to make you see Theres hope beyond the pain If we give enough if we learn to trust [Chorus] I know if I could find the words To touch you deep inside Youd give our dream just one more chance Dont let this be our good-bye
標簽： crossroads confused telling again
上傳時間： 2016-04-12
上傳用戶：changeboy
matlab軟件的仿真實列。 If you have any bugs and questions in our simulation programs, please e-mail to harada@ieee.org. We try to do our best to answer your questions.
標簽： simulation questions programs matlab
上傳時間： 2014-01-24
上傳用戶：cmc_68289287
I ve written some many years ago dynamic Huffman algorithm to compress and decompress data. It is mainly targeted to data with some symbols occuring more often than the rest (e.g. having some data file consisted of 3 different symbols and their total number of occurence in that file s1(1000), s2(200), s3(30) so the total length of file is 1000+200+30=1230 bytes, it will be encoded assigning one bit to s1 and 2 bits to s2, s3 so the encoded length will be 1*1000+2*(200+30)=1460 bits=182 bytes). In the best case the file consisted of just one symbol will be encoded with compression ratio as 1:8. Huffman coding is used in image compression, however in JPEG2000 arithmetic codec is imployed.
標簽： decompress algorithm compress Huffman
上傳時間： 2016-05-16
上傳用戶：aysyzxzm
我所采用的內存管理思想是鏈表管理思想，內存分配方案是最佳適應方案（best fit）。其主要的數據結構為 struct node { char* p int memosize int flag struct node* next } 這是一個鏈表的結點的數據結構，用它來管理內存的分配與回收。P 表示所指的分配的內存的首地址，memosize 表示分配的內存塊的大小，flag 為一個標志量，表示內存塊是否被占用。用 1 和 0 來表示被占用和不被占用。next 表示下一個結點的首地址。 內存管理包括一個分配內存的mm_request（unsigned int）函數，一個初始化所要管理的內存的mm_init（）函數，一個空閑列表排序函數sort()，一個釋放內存的mm_release(void* )函數和一個判斷內存是否被占用的IsFree(int)函數。
標簽： 內存管理
上傳時間： 2016-07-06
上傳用戶：qunquan
非常好的優化算法的書，詳細介紹了蟻群算法和粒子群算法以及相關的matlab工具箱，講了理論和應用給出了工具箱的下載地址。 Swarm intelligence is an innovative computational way to solve hard problems. In particular, particle swarm optimization, also commonly known as PSO, mimics the behavior of a swarm of insects or a school of fish. If one of the particle discovers a good path to food the rest of the swarm will be able to follow instantly even if they are far away in the swarm. Swarm behavior is modeled by particles in multidimensional space that have two characteristics: a position and a velocity. These particles wander around the hyperspace and remember the best position that they have discovered. They communicate good positions to each other and adjust their own position and velocity based on these good positions.
標簽： 優化算法
上傳時間： 2014-01-26
上傳用戶：zgu489
Already the industry standard for Python users, Programming Python from O Reilly just got even better. This third edition has been updated to reflect current best practices and the abundance of changes introduced by the latest version of the language, Python 2.5
標簽： Python Programming industry standard
上傳時間： 2013-12-13
上傳用戶：zgu489
The purpose of this Primer is to help you begin to use MATLAB. It is not intended to be a substitute for the online help facility or the MATLAB documentation (such as Getting Started with MATLAB, available in printed form and online). The Primer can best be used hands-on. You are encouraged to work at the computer as you read the Primer and freely experiment with the examples. This Primer, along with the online help facility, usually suffices for students in a class requiring the use of MATLAB.
標簽： intended substitu to purpose
上傳時間： 2013-12-27
上傳用戶：dengzb84
