Currently, research of parallel databases mainly focuses on relational database, and parallel environments are always based on special parallel architectures. With the rapid expanding of the markets of object-relational database, requests to parallel processing are increasing screamingly Certainly it will be significant to build a parallel objectrelational database. But it is a challenging work too.

本文分析了我國電力系統(tǒng)運行特點及其對短期調(diào)度與運行優(yōu)化提出的要求性欧美69式XXXXX，針對調(diào)度中心能量管理系統(tǒng)的重要組成部分——短期調(diào)度與運行優(yōu)化青青青青在线网站视频，應(yīng)用數(shù)學(xué)規(guī)劃的理論和方法，解決復(fù)雜水火系統(tǒng)短期經(jīng)濟(jì)調(diào)度中的水火電計劃與調(diào)度和電網(wǎng)絡(luò)運行優(yōu)化問題AV永久无码天堂网毛片。

As the development environment, SQL SERVER 2000 is regarded as the database server , static news of the classification of the news, template, front desk of page self-defining to turn into, and authority and backup person who shrink a series of functions of database , administrator of backstage supporter ,, have finished all functions of a static news briefing system, realize the course has adopted a large amount of JAVABEANs to realize the complicated logic operation to the database and server..

摘要本系統(tǒng)采用JDK 1.4.1作為開發(fā)環(huán)境2021国产免费牲交视频免费，SQL SERVER 2000作為數(shù)據(jù)庫服務(wù)器，實現(xiàn)了對新聞類別無限級分類設(shè)置黄色视频A级毛片，靜態(tài)新聞的發(fā)布修改刪除爱情岛论坛高清无码，前臺頁面的模板自定義和生成，以及后臺管理員權(quán)限和數(shù)據(jù)庫的備份收縮等一系列的功能在线观看国产综合日韩视频，完成了一個靜態(tài)新聞發(fā)布系統(tǒng)的所有功能91最新免费网站网址，實現(xiàn)過程了采用了大量的JAVABEAN來封裝對數(shù)據(jù)庫和服務(wù)器實現(xiàn)復(fù)雜邏輯操作。

The traditional query tree optimization methods,parallel database optimization methods based on left linear trees and right linear trees,bushy trees,and operation of the forest,have their own pros and cons,they have been more in-depth and maturity of the study.The query optimization method based on multiple weighted tree has studied its model of parallel query plan,its complexity model of parallel query plan and query optimization algorithms.The semantic query method transforms an inquiry into one or several semantic equivalence inquiries then has to find and implement a strategy to achieve a better query.Agent-based parallel database query optimization using Multi-Agent technology to automatically search the integrity constraint conditions which are related to the determined query,there for,the efficiency between several relations' joins has been greatly improved.The parallel optimization algorithm,based on genetic algorithm which is suitable for multi-joins of cluster environment,has deeply studied the relations storage options,multi-joins query optimization and query processing and other key technologies based on cluster parallel database.

傳統(tǒng)的查詢樹優(yōu)化方法偷拍精品日韩视频，即基于左線性樹免费黄色一级网站、右線性樹、濃密樹毛片免费地址、操作森林的并行數(shù)據(jù)庫查詢優(yōu)化方法2级黄片免费，各有優(yōu)劣，對其的研究比較深入www.jizzcom、成熟国产免费A片在线网址；基于多重加權(quán)樹的查詢優(yōu)化方法，研究了其并行查詢計劃模型3级电影网站入口、并行查詢計劃的復(fù)雜性模型和查詢優(yōu)化算法欧美一级婬片人妻欧美大片百度；語義查詢優(yōu)化方法將一個查詢變換成一個或數(shù)個語義等價的查詢，進(jìn)而尋找并執(zhí)行這些等價查詢中具有較好實現(xiàn)策略的一個看一下最好最好的黄片片最刺激的视频；基于Agent的并行數(shù)據(jù)庫查詢優(yōu)化采用Multi-Agent技術(shù)自動查找與給定查詢有關(guān)的完整性約束條件:人人爱人人操，使得多個關(guān)系間連接操作的效率得到很大的提高；基于遺傳算法的并行優(yōu)化算法久久精品无码专区免费东京热，深入研究了基于機(jī)群并行數(shù)據(jù)庫中關(guān)系存儲的選擇欧美乱操屄片、多連接查詢優(yōu)化和查詢處理等關(guān)鍵技術(shù)。

With these values defined, WordPress will use the designated database characterset and database collation (ie sort order of the letters, numbers, and symbols of a character set) when connecting a database tables.

與這些價值觀的界定免费裸体黄网站，在WordPress將使用指定的數(shù)據(jù)庫字符集和數(shù)據(jù)庫的整理（即排序順序的字母，數(shù)字和符號的字符集）時，連接數(shù)據(jù)庫表亚洲怡红院久久精品综合。

The database of this system is based on Microsoft Visual Database Tools built in Visual Basic 6.0.And the interface of this system is made of costumed windows and system windows. combines At the same time, we use band control and DAO for accessing database and SQL for the implement of finding operation. and use SQL inquire about definitely Realize the book, the stock, to finish granting relevant to operate it teaching materials of teaching materials of teaching material on the basis of this.

本系統(tǒng)的數(shù)據(jù)庫是通過可視化數(shù)據(jù)管理器建立起來的欧美黄色二区，而系統(tǒng)的界面采用了自定義窗體和系統(tǒng)窗體相結(jié)合的方式制作；同時国产精选午夜福利91在线，系統(tǒng)采用綁定控件訪問數(shù)據(jù)庫和數(shù)據(jù)訪問對象訪問數(shù)據(jù)庫兩種訪問方式亚洲狼友视频网站，并使用SQL查詢語言對系統(tǒng)查詢功能進(jìn)行編碼并在此基礎(chǔ)上實現(xiàn)教材的預(yù)訂、教材的庫存一级a在线看片、教材的發(fā)放等相關(guān)操作人人插人人摸人人插。

The Database,Union Catalog Database of Chinese,Western letters, Japanese and Russia, its plat is on base Web journal database applications server, The Documentation and Information Center of CAS...

中國科學(xué)院文獻(xiàn)情報中心牽頭研建的"全國中西日俄文期刊聯(lián)合目錄數(shù)據(jù)庫"正是這樣的 Web平臺期刊數(shù)據(jù)庫應(yīng)用系統(tǒng)，本文簡要闡述了該數(shù)據(jù)庫的概況日本黄色片A三级三级三级、網(wǎng)絡(luò)服務(wù)系統(tǒng)的功能特點尤物视频网址免费看、服務(wù)對象和方式及其進(jìn)一步擴(kuò)展的服務(wù)功能

UserID and Password are stored in an database, in the case of this sample, the database is a SQL Server 2005 Mobile database.

用戶名和密碼存儲在數(shù)據(jù)庫，在這個樣本情況下国产区露脸在线视频，該數(shù)據(jù)庫是SQL Server 2005移動數(shù)據(jù)庫韩国精品视频在线一区二区。

Given the difference in database management systems, it is clear to see why the Versant database uses an object database for its projects.

鑒于不同的數(shù)據(jù)庫管理系統(tǒng)，很清楚地看到為什么Versant數(shù)據(jù)庫使用一個對象數(shù)據(jù)庫的項目日韩清纯无码自拍视频网站。

China Infosearch engine consists of distributed parallel spider, whole-lengthsearch database, intelligent information processing model,CGI and smart browser, etc. It supports whole-length search, concept search basedon language database and concept search based on knowledge database.

首信搜索引擎主要由分布式并行Spider一级a片欧美在线视频、全文檢索數(shù)據(jù)庫、智能信息處理模塊殴美特级黄片、CGI和智能瀏覽器等模塊構(gòu)成91福利视频导航一区二区，支持全文檢索、基于語料庫的概念檢索和基于知識庫的概念檢索欧美性爱精品影库。

Database time types and the relationship between database time and bitemporal database has been discussed. Combining the space and time, the notion of spatio-temporal model was educed.

結(jié)合空間和時間男人禁黄色视频，引出了時空數(shù)據(jù)模型的概念，重點回顧了前人的研究成果欧美系列黄片黑人黑屌，討論了各種時空概念模型的各自特點久久精品国产一区二区三区。