concurrent information system 中文意思是什麼
concurrent information system
解釋
並發信息系統- concurrent : adj 1 同時發生的，並發的，並存的，共存的；合作的。2 （意見）一致的。3 【動物；動物學】趨合的；【...
- information : n. 1. 通知，通報，報告。2. 報導，消息，情報。3. 資料，知識，學識。4. 【自動化】信息，數據。5. 【法律】起訴，告發。adj. -al
- system : n 1 體系，系統；分類法；組織；設備，裝置。2 方式；方法；作業方法。3 制度；主義。4 次序，規律。5 ...
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In the following chapters, the interoperable model of webgis, multi - level b / s architecture, multi - thread for network computing and concurrent access, dcom, intelligent agent, intelligent spatial search engine, information security are discussed in detail. with these key technologies, the system of publishment and analysis of city air quality based on webgis is designed and implemented
借鑒這些關鍵技術，在arcims的基礎上，設計並實現了基於webgis的全國重點城市空氣質量發布系統，將空氣質量狀況與空間數據結合起來，生動直觀的反映了各主要城市的空氣質量狀況，方便了用戶的查詢，為環保事業作出應有的貢獻。 -
This system makes people fell convenient in looking for data, try my best to our environment protection. the following problems and related solutions are given in this paper : data structure suitable for web computing multi - user access and concurrent control mechanism in webgis network protocol and intelligent information agent of spatial information spatial information security in web computing environment web integration strategy of spatial information based on metadata architecture of webgis at last, the development trend of webgis is discussed
通過論文工作提出了以下幾個問題並給出了相應的解決方案適合web計算的數據模型webgis中的多用戶訪問與並發控制機制空間信息的網路計算策略與實施方案及關鍵演算法空間信息的網路傳輸協議與智能空間信息代理web計算環境下的空間信息安全性問題基於metadata的空間信息web集成方案與智能空間搜索引擎webgis體系結構最後，論文對webgis發展趨勢進行了探討。 -
In view of aircraft product design characteristics, this study is based on aircraft concurrent product design process model and process definition method to analyze the data driven concurrent product design process model and give an information description of the project management system and process based on the data structure
針對飛機產品設計的特點，建立數據驅動的并行產品設計過程模型，提出并行設計過程中的五種數據類型，以及基於數據結構的項目管理機制和過程信息描述。 -
All the subsystems are concurrent and independent working. they exchange information through the up system
各子系統并行運行、獨立工作，通過上位機進行信息交換。 -
As the application of distributed computing is used much more widely ， distributed database becomes a significant part of information management it avoids a lot of disadvantages of conventional centralized database ， and is applicable to many situations distributed database is a set of data which is the unity logic ， but in fact these data is located on different sites it is of high availability ， easy expansibility ， high concurrency ， high efficiency and etc in distributed system ， data redundancy is a method to improve the speed of query and the availability of system distributed query should shield the lower level details of data redundancy from end users ， distributed transaction should ensure data from disaccord this paper introduces basic conceptions of distributed database firstly ， discusses distributed transaction and concurrent control ， describes the development prototype mysql ’ s characters ， architecture and executive mechanism ， then shows the skeleton model of dpsql and exposes the strategy and algorithm of distributed query and distributed transaction ， at last analyzes the extra expenses and response delay of distributed processes this paper exposes the implementation mechanism of distributed query and distributed transaction emphatically distributed query uses the strategy of “ read one ， write a11 ” s0 in such a system if user ’ s requests are read - - only for the most part and the distribution of data redundancy is plausible ， efficiency is very high distributed transaction uses two - 。 phase commit protocol to ensure the consistency of global data ， which has less communication overhead
分散式查詢需要向用戶屏蔽數據冗餘分散的底層細節，分散式事務處理要保證全局數據完整，這都是傳統集中式數據庫不曾面臨的問題。本文首先介紹了分散式數據庫的概念性問題；接著討論了分散式事務涉及的定義及演算法；然後描述了dpsql的原型mysql的特性、結構和執行機制；繼而給出了dpsql的梗概模型，闡述了實現分散式查詢和分散式事務處理的策略及演算法；最後分析了進行分散式處理給系統增加的額外開銷和客戶端的額外響應延遲。本文重點描述了分散式查詢和分散式事務處理的實現機制，分散式查詢採用」讀一個寫全部」的本地優先策略，在讀操作頻繁的系統中，只要庫的分佈合理，單機效率極高，幾乎無任何附加開銷和延遲，而以整個系統的角度看來，吞吐量就更是優于單機系統；分散式事務處理採用兩階段提交協議，通信次數較少並能確實保證副本一致。
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