database optimization 中文意思是什麼
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Third, this dissertation analyzes the complicacy of result size estimation problem for xml structure based query optimization compared to its counterpart in traditionally relational database, and proposes a full - featured result size estimation algorithm for xml query, sxm. for simple path expression query, this dissertation proposes a dynamic synopsis model for xml data based on the concept of f - stable and b - stable, xmap. for complicated path expression query, this dissertation adopts an improved bifocal sampling method for result size estimation
第三，分析了xml結構化查詢優化中的查詢代價估計問題與傳統關系型數據庫中的查詢代價估計問題的區別，提出了一套完整的xml結構化查詢代價估計體系sxm ，包括對簡單路徑表達進行查詢代價估計的動態xml數據統計模型xmap ，對復雜路徑表達進行查詢代價估計的雙焦點例舉法，以及對值匹配條件進行查詢代價估計的基於小波的多維直方圖方法，並能將多種查詢表達的查詢代價估計結果結合在一起，以給出一個完整的xpath查詢的代價估計。 -
In this thesis, the studies emphasize on optimization of concurrency control algor ithms for real - time database systems
針對這些資源浪費問題，本文著重研究了實時事務並發控制演算法的優化問題。 -
According to the state of discharge gap, combining database technology, we adopt neuro - fuzzy control technology to realize real - time control of edm process and auto - adjustment on the basis of process state, which ensure the process is in the state of optimization
依據放電間隙狀況，通過採用神經模糊控制智能技術，並結合數據庫技術，對電火花成型加工過程進行實時控制，根據加工狀態自動進行調節，保證了加工過程處于優化狀態。 -
After knowing fully the present situation of business operation of the golden cereal company and development characteristics in logistic - system field, the mathematics model of logistics system has been established in the article with the application of linear program method in operational research, as well as the strategy of minimum route in graph theory and the thought of transiting all over ; meanwhile, on the foundation of internet network technology and structure of b / s, the online optimization design and production of web page have been carried out for the logistic - system of the golden grain farming capital company with adoption of jsp ( java server page ) technology and sql server database technology
本文在充分了解金色谷農資公司的業務運行現狀和物流配送行業發展特點的基礎上，應用運籌學的線形規劃方法，以及圖論中最短路徑的策略和圖的遍歷的思想，建立了配送系統數學模型；並基於internet網路技術b s結構基礎上，採用jsp （ javaserverpage ）技術和sqlserver數據庫技術，對金色谷農資公司物流配送系統進行了網上優化設計及網頁製作，研製開發了金色谷農資智能配送網。 -
15 wang j c, horng j t, hsu y m. a genetic algorithm for set query optimization in distributed database systems
然後提出了一種面向語義數據庫網格的，具有動態并行和啟發式特點的查詢優化演算法。 -
6 we present the query optimization method. for the clustered time series database, the query sequence is classified to one of the cluster, and the efficiency of querying is improved for the similarity search space is limited in the cluster, . 7 we implement a client / server query system and test the presented methods
根據序列數據庫的聚類結果，將序列數據庫劃分為若干層次的簇結構，通過對查詢序列進行k最鄰近分類，確定查詢序列所屬的簇，然後在相應的簇中執行相似性查詢，實驗結果表』明，基於簇的查詢顯著提高了查詢效率。 -
Based on integration of " high yield & benefit and good grain quality of modeled cultivation of foodstuff crop ( rice ) and its consultation system ", this thesis sets it ultimate goal to deal with the knowledge discovery in the consultation system of simulation - optimization decision making in quality and high - yielding rice cultivation. after a close study of the features of the database in rice cultivation, this thesis introduces the system engineering theory of agent aralysing and designing and offers a practical new way to promote the intelligence of the knowledge discovery system in rice cultivation database, to improve the efficiency of data mining and the human - computer interactive ability to realize the integrated knowledge - based combination between human and computer or among the sub - systems
本文以廣西「糧食作物（水稻）兩高一優模式栽培技術集成與咨詢系統研究」為背景，以基於專家系統（ es ）的水稻優質高產栽培模擬優化決策咨詢系統的知識獲取問題為導向，針對水稻栽培數據庫的特點，從系統工程角度引入面向agent的分析與設計思想，提出一種用多agent從水稻栽培數據庫中發現知識的人機合作、半自動的知識獲取方法，實現利用多agent的自主性、反應性和社會性，提高水稻栽培數據庫知識發現系統的智能水平、數據挖掘效率和人機交互能力，實現人機之間、各子系統之間基於知識的柔性綜合集成，為水稻栽培知識發現提供了一條新的可行途徑。 -
Contrasting with single search engine, meta search engine have n ' t it ' s own database and have no need to collect or store webpage, so it can pay more attention to the selection of single search engine and the optimization of search queries and results
相對于獨立搜索引擎，元搜索引擎一般沒有自己獨立的數據庫，這就省去了收集和存儲網頁、建立和存儲索引的工作，從而把工作重心放在搜索引擎的選擇、檢索請求的優化和檢索結果的優化上。 -
This thesis devoted to study three - dimensional data stored in database, three - dimensional optimization, the corresponding algorithm of two - dimensional data and three - dimensional data and principle of interactive technical application of virtual reality with three - dimensional model at the theoretical research. the goal of technical research is to develop a set of interactive system based on virtual reality and web with the ordinary computer, namely create a real - time and lifelike virtual reality environment without special hardware equipment, and applies this environment to the interactive system like inquiring, thus to set up a kind of high - quality interactive visiting and inquiring system based on technology of a new generation virtual reality
理論研究的目標致力於三維數據在數據庫中的存儲、三維模型的優化、二維坐標與三維坐標的對應演算法及虛擬現實互動式技術應用的原理；技術研究的目標是在web環境下，利用普通微機開發出一套基於虛擬現實技術的互動式系統，即在無需特殊硬體設備的條件下，能夠創造一個實時逼真的虛擬現實環境，並將此環境應用於查詢等互動式過程，從而建立起一種基於新一代虛擬現實技術的高質量的互動式訪問與查詢系統。 -
Consulting with the customer regarding current network, system, and database performance, analysis of network bottlenecks and establishment of optimization programs, and communication with the customer organizations regarding technical testing, and data backup, to ensure continued operation
聽取顧客關于網路、系統、數據庫性能的現狀，現場分析瓶頸所在制定性能調優方案，並與顧客交流溝通組織相關的技術測試，顧客的數據備份，確保萬無一失。 -
Database plays a vital role in nmis, therefore the quality of database effects directly on the success of nmis or not. the whole process of database " development is described in detail. meanwhile, we also deeply discuss the databases " performance optimization, backup and restore scheme, the strategy of safe control, data exchange in new and old central blood mis and so on
數據庫是整個mis大廈的基石，其設計的好壞直接影響到mis設計的成敗，因此，如何設計一個性能優良的數據庫便顯得至關重要，本文詳細地描述了山西省采供血網路管理系統數據庫的設計以及對其進行規范化和非規范化處理的整個過程，此外，文章對數據庫的性能優化、備份與恢復方案、安全控制策略、中心血站新舊mis系統的數據交接等方面也進行了較為詳盡的分析和討論。 -
Therefore, more challenges have arisen for query optimization in database grid than traditional distributed database. following this observation, the design of a query optimizer in dartgrid ii is presented, and a heuristic, dynamic and parallel query optimization approach to processing query in database grid is proposed. a set of semantic tools supporting relational database integration and semantic - based information browsing has also been implemented to realize the above vision
克服數據庫網格特性所帶來的困難需要為數據庫網格提供全局一致的數據表達模式各結點數據模式到全局模式之間的映射方法各結點之間負載平衡和結點動態加入和退出系統的控制策略數據庫網格查詢優化器結構設計以及一整套適合數據庫網格的查詢優化演算法。 -
2. the design of database query optimization
2 .在數據庫的查詢優化設計方面。 -
It has detailed descriptions of the general strategies in developing gis controls, such as the selection of data store mode, efficient organization of spatial data and property data and the optimization rules of controls etc. chapter 6 refers to the special development and realization of components gis of power network. it comprises the key questions in the course of developing gis controls. the questions are : how to divide the classes in programs, the layer relationship of classes, the definition of classes, the partial realizations of graphical operations, the interfaces between control and exterior program, and the interfaces between control and database etc. chapter 7 concisely explains a practical components gis control application - huaxian power network gis system
這些問題包括：程序中類的劃分；類的層次關系；類的定義；部分圖形操作的具體實現；控制項與外界程序的介面；控制項和數據庫的介面等：第七章為應用實例一滑縣電網s系統，本章簡要介紹了用組件式gis控制項開發的以s系統的設計目標、設計原則、系統集成框架和系統功能等； ；第八章對系統的可用性做分析，並討論了一些需要進一步完善的問題。 -
Under the background of alot material under distributed computing environment, this paper emphasizes to study three key problems : the integration of relational database, the design of database query optimization and alot material
本文以分佈環境下物資分配過程為現實背景，著重研究了其中的三個主要問題:關系數據庫的集成、數據庫的查詢優化設計和物資分配問題。 -
In this thesis, we adopt the technique of statistical training, create a sample database of every kinds of expression face images, construct a matrix of the difference of each sample and average image, and reduce dimension by pca, then decrease the relativity of principle components by ica, and therefore get the character sub - space of face. when detecting a face, we adopt the method of disturbing principle components of model to match special facial image, which is called whole optimization method in this thesis
論文採用統計訓練的思想，選擇包括各種表情變化的人臉圖像建立樣本庫，取所有樣本與平均圖像的差構造一個矩陣，利用主元分析方法進行降維，然後通過獨立元分析降低主元相關性，建立了人臉的特徵子空間；演算法採取對主元進行擾動優化匹配的方法檢測人臉，本文稱此方法為全局最優的方法。 -
The characteristics of distributed database are introduced in this paper, common used query optimization algorithms are provided are provided, and the method of selection algorithm is given
介紹了分散式數據庫的特點，詳細闡述了常用的查詢優化演算法的思想，分析了優缺點，給出了演算法選擇的方法。 -
After confirming system goal, according to overall design rule, system overall design is to carry out system overall logic structural design and software and hardware design of system ; system function design includes data to get and edit modular, data inquiry and statistics modular, overall estimetion modular, function district estimetion modular and typical cadastral parcel estimetion modular, land optimization deployment modular as well as urban land grade and evaluation modular ; database detailed design includes the design of space database and property database as well as design for the connection of space data and property data ; system application model analysis mainly explains models for intensivism degree, unit comprehensive value, land area potential, land benifit potential as well as typical cadastral parcel estimetion
系統總體設計是在確定系統目標后，按照總體設計準則，進行系統總體邏輯結構設計及系統的軟硬體配置設計；系統功能設計包括數據獲取及編輯模塊、數據查詢統計模塊、總體評價模塊、功能區評價模塊、樣地評價模塊、土地優化配置模塊以及城鎮土地定級估價模塊等七大模塊的設計；數據庫詳細設計包括空間數據庫、屬性數據庫的設計以及空間數據與屬性數據的連接設計；系統應用模型分析部分主要對于集約度模型、單元綜合分值計算模型、用地面積潛力測算模型、用地效益潛力測算模型以及樣地潛力評價模型做出了分析解釋。 -
Combining with advanced science and technology such as modem computer network technology, database management system and modem communication technology etc, the reservoir dispatching automatization system has developed from the indispensable application system such as water inspecting system, flood forecasting system, reservoir dispatching and water information querying system etc into an integrated functioning system used for the dispatching of water power stations. using the management information system, database management system, geographic infonnation system, optimization technology, statistics etc. this paper with the project background of the three gorges cascade dispatching of reservoirs, bring forward the plan of dispatching automation system of three gorges cascade reservoirs. this project have been adopted in the three gorges project
本文應用信息管理系統、數據庫管理系統，地理信息系統、最優化技術、統計學等方面的理論和知識，以滿足三峽工程梯級水庫調度的需要為前提，提出了三峽工程梯級水庫調度自動化系統的方案結構，該方案已被三峽工程的建設所采納，同時，在水情遙測系統的通信組網方式上，本文提出的inmarsat - c與pstn聯合組網的通信方式，在我國水電站的水情測報系統中，首次在葛洲壩項目中成功地應用，並且該方式也將應用於三峽水庫調度自動化系統。 -
By using query optimization, database index, middle base and automatic data update technique, the dw project is very successful. the academic design, the method of implement and the future of insurance industry data warehousing are introduced
通過運用查詢優化技術、數據倉庫索引技術、帶中間庫的三層結構和數據倉庫數據自動更新方案成功地建立了大連人壽保險業務數據倉庫系統。
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