實驗描述:分布式數(shù)據(jù)庫的算法partition的具體實現(xiàn)。即通過該算法找到關(guān)系數(shù)據(jù)庫最優(yōu)分裂點,使得結(jié)果最優(yōu)。 算法思想: 1、 首先根據(jù)所輸入的attribute usage matrix得到AQ( ) 2、 對CA矩陣中劃分點預(yù)先設(shè)在n-1處,并將屬性列分成兩個集合,TA和BA,TA中的元為:{ A1 、A2 …… An-1 },BA中的元素為:{ An} 3、 確定集合TQ、BQ和OQ,其中TQ={ qj| AQ(qi) TA},BQ= TQ={ qj| AQ(qi) BA}, OQ=Q-{TQ BQ}。 4、 計算出CTQ、CBQ、COQ這些值,其中CTQ= ,CBQ= ,COQ= 5、 通過劃分點的第次移動分別計算出z=CTQ*CBQ-COQ2 6、 對取到的z的最大值處標(biāo)記,為分割點 7、 對CA進行調(diào)整,重復(fù)計算得到最終z的最大值點,對CA矩陣進行劃分 8、 對上述算法進行修改,將得到的最大z值的分割點和次大的分割點都記錄下來,得到兩個分割,則將原有的屬性集劃分成三部分。 該算法的目的是找到獨立存取的屬性集合或者分別的應(yīng)用集。比如說,如果可以找到兩個屬性A1,A2,他們只是被q1讀取,而A3,A4被q2,q3讀取,這樣在分裂的時候可以確定。算法就是找到這些組。另外為了簡單化起見,我命令refj(qi)全部等于1.
標(biāo)簽: partition 算法 實驗 分布式數(shù)據(jù)庫
上傳時間: 2015-06-04
上傳用戶:13160677563
實驗描述:分布式數(shù)據(jù)庫的算法partition的具體實現(xiàn)。即通過該算法找到關(guān)系數(shù)據(jù)庫最優(yōu)分裂點(2個),使得結(jié)果最優(yōu)。 1、 首先根據(jù)所輸入的attribute usage matrix得到AQ( ) 2、 對CA矩陣中劃分點預(yù)先設(shè)在n-1處,并將屬性列分成3個集合,TA和BA和MA, 3、 確定集合TQ、BQ,MQ和OQ,其中TQ={ qj| AQ(qi) TA},BQ= TQ={ qj| AQ(qi) BA}, MQ={ qj| AQ(qi) MA},OQ=Q-{TQ BQ}。 4、 計算出CTQ、CBQ、CMQ、COQ這些值,其中CTQ= ,CBQ= ,CMQ= ,COQ= 5、 通過劃分點的第次移動分別計算出z=CTQ*CBQ*CMQ-COQ3 6、 對取到的z的最大值處標(biāo)記,為分割點 7、 對CA進行調(diào)整,重復(fù)計算得到最終z的最大值點,對CA矩陣進行劃分 對上述算法進行修改,將得到的最大z值的分割點和次大的分割點都記錄下來,得到兩個分割,則將原有的屬性集劃分成三部分。
標(biāo)簽: partition 算法 實驗 分布式數(shù)據(jù)庫
上傳時間: 2015-06-04
上傳用戶:515414293
W2kPrintDrvSample Feature ======= * Support two page directions, portrait and landscape * Support just one page size, A4 * Support two resolutions, 200 x 200 and 100 x 100 dpi * Support two color mode, color(24bpp) and monochrom * Support halftoning in monochromatic mode * Support color identifying(7 colors) * Support type identifying(3 types) ... usage ===== * 在monochromatic mode下,可以通過設(shè)置黑色的輸出類型來控制輸出 * 在color mode下,可以通過設(shè)置各個顏色的輸出類型來控制輸出,7種 顏色以外的顏色都作為黑色來識別 * 在輸出多頁文件時,可以分別指定每頁的輸出文件名,也可以使用自動 添加頁號的功能 ... Known Problems ============== Developer Notes =============== * 在windows ddk 命令行環(huán)境下編譯 參考步驟: 1. 將W2kPrintDrv解壓至DDK安裝目錄 2. 執(zhí)行“開始”菜單->Developement Kits->Windows 2000 DDK->Checked Build Enviroment 3. 在命令行環(huán)境輸入 > cd W2kPrintDrv > build Author ====== terrificskyfox <terrificskyfox@yahoo.com.cn>
標(biāo)簽: W2kPrintDrvSample directions landscape portrait
上傳時間: 2015-06-11
上傳用戶:GHF
A C++ N-grams Package 2.0 This is a simple C++ n-grams package that includes a header, the corresponding cpp file, and a sample driver program. It is a natural language processing tool for creating n-gram profiles for text documents. The details on usage is documented in the header right above each public function defined. This package is based on Dr. Vlado Keselj s Perl package Text::Ngrams which is available in CPAN.
標(biāo)簽: includes correspo N-grams Package
上傳時間: 2015-06-12
上傳用戶:wfl_yy
Person-to-person realtime IP communications, like presence, VoIP and video applications, offer clear benefits for the enterprise as time- and money-savers. Unified functionality is now available, where all of the above are integrated into one streamlined application and interconnect with other networks. This creates a very important business tool and usage is increasing.
標(biāo)簽: Person-to-person communications applications realtime
上傳時間: 2015-06-28
上傳用戶:維子哥哥
DTMF檢測程序。定點計算,可移植到DSP上。 usage: dtmf filename
上傳時間: 2015-07-02
上傳用戶:huql11633
This program is using Genetic Algorithm to solve the Travlling Salesman Problem. It gives the best path route within a specified time. usage: java Evolver <seconds> <city file> <config file> Author: Liu Yang
標(biāo)簽: Algorithm Travlling the Salesman
上傳時間: 2013-12-06
上傳用戶:nanfeicui
人工智能中模糊邏輯算法 FuzzyLib 2.0 is a comprehensive C++ Fuzzy Logic library for constructing fuzzy logic systems with multi-controller support. It supports all commonly used shape functions and hedges, with full support for the various types of Aggregation, Correlation, Alphacut, Composition, Defuzzification methods. The latest version of the C++ Fuzzy Logic Class Library contains all the C++ source code and comes complete with a usage example for building a multi-controllers fuzzy logic model.
標(biāo)簽: comprehensive constructing FuzzyLib library
上傳時間: 2013-12-17
上傳用戶:dbs012280
藍牙協(xié)議(GAVDP)This profile defines the requirements for Bluetooth™ devices necessary to set up streaming channels used for support of audio/video distribution. The requirements are expressed in terms of services provided to applications, and by defining the features and procedures that are required for interoperability between Bluetooth devices in the Audio/Video Distribution usage model.
標(biāo)簽: requirements Bluetooth necessary profile
上傳時間: 2014-01-04
上傳用戶:bcjtao
藍牙協(xié)議This specification describes the Audio/Video Control Transport Protocol (AVCTP), which is used to transport command and response messages for controlling Audio Video features in conformant devices. This protocol enables a device to support more than one control profile at the same time each supported profile shall define its own message formatting and/or usage rules.
標(biāo)簽: specification describes Transport Protocol
上傳時間: 2015-08-11
上傳用戶:大融融rr
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