stable database 中文意思是什麼

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。

Abstract : in order to make an solution to modeling the image database system, this paper proposes an image data model idm, which decomposes the image object into the primary table of stable attributes and assistant tables of variable attributes and are temporarily organized to access the image data when making query and inference. it can model with unified mode each scheme of the image database system structure

文摘:為解決圖象數據庫建模，提出一種新的圖象數據模型，將圖象對象分解為由穩定屬性組成的主表部分和若干個可變屬性組成的副表部分，查詢推理時對主表和副表臨時組織以完成圖象數據的存取管理等，它能對圖象數據庫5級模式結構的每級模式一致建模。

This database has logic structures, powerful query functions and stable operation

本文的數據庫結構合理、查詢功能強、運行可靠。

The experimental results on orl face database show that by the proposed improved method, eigenvalues of the optimized covariance matrices become larger and the matrices inverses become more stable

在orl人臉庫上的實驗表明，優化后協方差矩陣的特徵值均顯著變大，使該矩陣的逆陣穩定性得到了提高。

Second, using the method of wavelet - transform, extract the stable second - low frequency wavelet coefficient, build face database. third, for the sake of eliminating the correlations between entities of the image vector and extracting character - vector, which keeps the main class - information and can be used to rebuild original image, the principal component analysis ( pca ) was used

對人臉庫進行主成份分析，此方法根據人臉圖像整體的灰度相關性來提取特徵向量，所提取出的特徵向量保留了原圖像空間中的主要分類信息，並能在均方誤差最小的意義上重建原圖像。

In this thesis, the database of gps vehicle monitor information management system is designed, the design of the man - machine conversation interface and the software of the database server, also the software of the mid - ware are accomplished. an improved and logical three layer structure framework is used to utilize the resource of the system efficiently, balance the load, and improve the expansibility of the system ; powerful oracle database is used as background database to provide high performance service to the system which has numerous users and large - scale ; encrpytion arithmetic of communication data is designed to ensure the safty of gps vehicle monitor information management system communication ; the usage of fire wall, system privilege management and data backup improved the safty of the information management system database ; high usability design is realized by oracle data guard ; optimization of the information management system made the whole gps vehicle monitor system persistent, stable and high quality

本文針對原有gps車輛監控系統響應速度慢、穩定性和安全性不高的不足，提出了一種以改進的三層結構體系為系統架構，以oracle數據庫為后臺的gps車輛監控信息管理系統設計方案，設計了gps車輛監控信息管理系統數據庫，完成了gps車輛監控信息管理系統人機界面、中間件及數據庫端的軟體設計。系統架構採用改進的三層結構體系，其邏輯結構清晰，有利於系統資源的有效利用，均衡負載，提高系統的可擴展性;后臺數據庫採用功能強大的oracle數據庫，可以提供大規模、多用戶的高性能服務;通信數據的加密演算法有利於確保gps車輛監控信息管理系統的通信安全;防火墻的使用、系統權限管理以及數據的備份和恢復等有利於提高gps車輛監控信息管理系統數據庫的安全性， oracledataguard的使用有利於提高系統的可用性;系統的優化，為系統持續、穩定、高質量運行創造了有利條件。

The most important works are the data integration, the implementation of the basic criterion of information management, the redesign of subject database, the construction of stable global data model, the re - combination of original information resource, rebuilding data environment, constructing integration data environment with subject database, in this way, the integration information system can be then constructed and applied to military oil depot

信息系統集成的基礎與核心是數據集成，即落實信息資源管理基礎標準，重新規劃設計主題數據庫，建立穩定的全域數據模型，重組原有的信息資源，改造雜亂無序的數據環境，建立以主題數據庫為主的數據環境。形成集成化的數據環境，才能建立和運行集成化的信息系統。

The concrete measures include the followings : selection of stable and powerful control system ; use of flexible control program to realize three - level control ( manual, automatic, and on - the - spot control ) ; application of sanitary on - the - spot detection equipments of high accuracy for quantification and control ; data collection for the whole process and data storage in real - time database and historical database ; application of production informatization interface to achieve automatic detection and gathering of every important technical parameters

措施為：選用穩定的、功能強大的控制系統；編寫靈活的控制方案，實現手動、自動、現場控制三級控制；選用衛生型、精度高的現場檢測設備參與計量和控制；全程數據採集，實時和歷史數據庫進行數據存儲；生產信息化介面等技術實現了對保健酒生產過程各種重要工藝參數的計算機自動檢測、採集，實現生產流程的自動控制。

During the process of enterprise informationization, relational database systems are widely used and are playing some significant roles in the data management of enterprises with their mature technology, powerful data management, the reliable and stable concurrent control

在企業的信息化進程中，關系數據庫由於技術成熟、數據管理能力強、穩定可靠的並發控制而得到了廣泛應用，並且在企業的各類數據管理中占據著重要地位。

The equipment spare parts management system uses a stable and rapid oracle10g background database, and use delphi, pl / sql, language development tools, debugging, using convenient, easy - to - client / server framework document prepared by the system of automatic promotion, customer terminal can achieve zero - maintenance

本設備備件管理系統以穩定、快速的oracle10g為后臺數據庫，使用delphi 、 pl / sql等語言開發、調試，採用方便、易用的client / server架構，編寫了系統自動升級文件，做到了客戶端零維護。