db data base 中文意思是什麼
db data base
解釋
數據庫-
To sum up, the above - mentioned data base technology and data warehouse technology regard as dss whole foundation of solution, data mining with on - line extension technology and data technology come and support, namely based on db + dw + olap + dm of best feasible scheme comprehensive to have at present
並討論了，各種方案之間的利弊得失。綜上，以上數據庫技術和數據倉庫技術作為決策支持系統整體解決方案的基礎，並以聯機分機技術和數據挖掘技術來支持，即基於db + dw + olap + dm的決策支持系統是目前最佳的可行方案。 -
Control enables you to use a web control to access data located in a relational data base, including microsoft sql server and oracle databases, as well as ole db and odbc data sources
控制項，可以使用web控制項訪問位於某個關系數據庫中的數據，該數據庫包括microsoft sql server和oracle數據庫，以及ole db和odbc數據源。 -
Based on these advantages we analyze the performance of constant - power variable - rate m - qam schemes for spectrally efficient data transmission over nmf channels. by introducing the adaptive modulation approach, we gain two things : 1 ) the error rate is kept at a constant level. 2 ) the achievable spectral efficiency comes within 5 db of the shannon capacity limit. at the last chapter, the presentation of a single base station and a single mobile scenario proved the feasibility of adaptive schemes
然後作者的精力轉入通道的自適應方案的研究中，首先通過研究發現nakagami衰落因子的適當調整可以近似於常見的瑞利衰落和萊斯衰落，接著研究在無線通道中採用三種不同自適應方案時的通道容量，研究表明速率的調整是增加通道容量的關鍵，在此基礎上，著重研究了離散變速率qam的情況，表明這種調制方案無論在頻帶利用率還是在系統平均誤碼率比其它情況提高很多。 -
This paper, which backgrounds from a information management system of a certain governmental department, makes a thorough research into the input and output of the heterogeneous data source, analyze the fundamental principle and realizing technique of data - transforming technique based on four different ways of date base access techniques, including odbc, ole db, ado and ado. net, compares the pros and ops of every kind of these techniques. this paper investigates three different data - transforming tools, including dts, sql * loader and datapipeline, compares the pros and ops of every kind of these techniques base on our case
本文以某政府部門的項目信息管理系統為背景，針對異構數據庫的數據導入導出技術進行了深入研究，分析了基於odbc 、 oledb 、 ado 、 ado . net等四種數據庫訪問技術下數據轉換的基本原理和實現技術，對dts 、 sql * loader 、 datapipeline等三種數據轉換工具的數據導入導出功能進行了對比，結合項目實際，比較分析了各種技術的優劣。
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