data base key 中文意思是什麼
data base key
解釋
數據庫關鍵碼-
The block cipher classes provided in the base class library use a chaining mode called cipher block chaining, which uses a key and an initialization vector to perform cryptographic transformations on data
基類庫中提供的塊密碼類使用稱作密碼塊鏈（ cbc ）的鏈模式，它使用一個密鑰和一個初始化向量（ iv ）對數據執行加密轉換。 -
According to this requirement, the railway mobile digital communication system based on the gsm system for mobile communication is put forward in this paper to accomplish the data transfer between the control center and the locomotive. in this paper, the design of the ms ( the mobile station ) and the erected bs ( the base station ) out of the gsm cover is carried out. last we discuss the key techniques of the railway mobile digital communication system, the handoff and the error _ correct coding
本文針對這種要求，在gsm移動通信系統的基礎上提出了建立電力機車移動數字通信網以實現機車與控制中心之間的數據傳輸的方案，設計了系統中車載移動臺、 gsm覆蓋區外自建基站的基本構造，分析了系統中越區切換、糾錯編碼等關鍵技術，並詳細的闡述了其實現方法。 -
The knowledge representation is a key aspect in the computer intelligent tutor system, which determines the effect of the inference process. moreover, it is necessity of the combination of the knowledge base with the teaching material base in its because it contains a lot of multimedia data
在計算機智能導師系統its中，知識表示是一個關鍵問題。它是計算機智能教學的基礎，其結構決定了智能推理過程的有效性。 -
Key realization technology of this system that included the space coordinates built, node model base established, scene structure expressed by data and safety rules checking was studied
研究了系統實現的關鍵技術，這包括空間位置坐標系統的確立，節點改模型庫的建立，虛擬場景的數據構建及安全規程的校驗方法。 -
In some projects charged by our lab such as national 863 project - " crop planting management components based on weather analyse ", anhui provincial 95 key project - " agricultural meteorology disaster evaluation system base on gis in anhui province " and the project " small coal mine security management and decision system based on gis in anhui province ", this paper combines the theory and arithmetic of rough set with gis and data mining in idss, investiges the application of rough set theory to precision analysis of attribute data and logical operation in gis, analyzes the logical operation based on rough set ( logical union, logical intersection, logical complement, mixed logical operation etc. ), so that it can give a method y to research the gis attribute data and the uncertainty of attribute data after superposition operator, so as to express the roughness and illegibility of attribute data more accurately
在完成試驗室所承擔的國家863項目「基於氣象分析的農作物種植管理軟構件」 、省95攻關項目「基於gis的安徽省重大農業氣象災害測評系統」和「基於gis的安徽省小煤礦安全管理決策系統」等項目中，將粗糙集理論和演算法與gis 、智能決策系統中的知識發現等相結合，對粗糙集理論在gis屬性數據和邏輯運算精度分析中的應用情況進行了研究，分析了基於粗集的gis邏輯運算（邏輯並、邏輯交、邏輯補、混合邏輯等） ，從而為研究gis屬性數據及其疊加運算后屬性數據的不確定性提供了一種方法，能比較準確地表達屬性數據的模糊性和粗糙性。 -
Measuring is a key technology during the crash test, " which including the signal of acceleration, the force of fix - counterguard and the responses of passengers. the hardware and software of data acquisition system are the two main points in vehicle base system
在碰撞試驗中，電測量技術也是關鍵技術，其測量項目包括碰撞過程中的減速度信號、固定壁障的碰撞力和乘員響應的測量。 -
In vsam, a collection of items used to sequence and locate one or more data records in a base cluster. each alternate index record contains an alternate key value and one or more pointers. when the alternate index supports a key sequenced data set, each data record ' s prime key value is the pointer. when the alternate index supports an entry sequenced data set, the data record ' s rba value is the pointer
在虛擬存儲存取方法（ vsam ）中，用於定序和定位基簇中的一個或多個數據記錄的項的匯集.每個備用索引記錄包含一個備用關鍵字的值和一個或多個指針.當該備用索引支持某個關鍵字順序數據集時，每個數據記錄的主關鍵字值就是這種指針.當該備用索引支持某個輸入順序數據集時，該數據記錄的rba （相對位元組地址）值就是這種指針 -
This paper first introduced the electronic war ' s basic concept, development process and its developing trend, and then gives out the theory, key technology, application and developing trend of communication scout, direction - finding communication and communication jam in great detail. after that the cjw - 2000 system was referred to, and its system function and information flowing was analyzed. then the paper analyzed and introduced the theory, function, system structure, technical guide line and working flowing of the electronic jam rivalry scouting and analysis sub - system in detail. at last it gave the analysis of the interface standard of the electronic rivalry scouting, its interface message format and the data - base design of different equipments
本文首先簡單介紹了電子戰的基本概念、電子戰的發展過程及發展趨勢，接著比較詳細地分析了通信偵察、通信測向、通信干擾等的原理、關鍵技術、應用及發展趨勢，然後對cjw - 2000系統進行了簡單介紹，並且對其系統功能及信息流程進行的簡單分析，之後又對cjw - 2000系統中的電子對抗偵察與分析分系統的原理、功能、系統結構、技術指標和工作流程等進行了比較詳細的分析與介紹，最後詳細分析了電子對抗偵察與分析系統的介面標準，並對電子對抗偵察與分析系統內部不同設備之間的介面報文格式以及數據庫的設計進行了詳細的分析。 -
Many former systems like this is purely according to c / s mode, but this system is base on the combine of c / s and b / s, and the same time, the high speed network technique of today is used, therefore the function of this system is more perfect ; the constructions of each departments of this system about database are discussed ( include mold construction, the table construction of database etc. ), the key techniques of database ( stored process, trigger and the safety technique ), the safety design of database, the safety design of program etc., and the establishing of data warehouse of customer is introduced, and a technique about graph of customer data warehouse ( realized with powerbuilder ) ; the design of network construction is briefly discussed ; the choice of servers is introduced in detail ( include the database server and the the web server )
以往的此類系統大多單純基於c / s模式設計，而本系統是兩種模式的結合，充分利用當今高速發展的網路技術，所以功能更加完善和強大；數據庫技術方面詳細介紹了各分系統的功能模塊設計（包括模塊結構、數據庫表結構設計等） 、后臺數據庫的關鍵技術（存儲過程、觸發器和數據庫的安全技術） 、數據庫安全性設計（採用雙機容錯解決方案） 、程序安全性設計和權限配置等，同時介紹了客戶數據倉庫的建立方案和客戶數據倉庫的一種可視化技術（用pb和sybase的工具來實現） ；簡要介紹了系統的網路結構設計過程；詳細介紹了服務器的選擇和選擇結果（包括數據庫服務器和web服務器） 。 -
Besides region planning information, ther reference frame are as same as urban base information. on every key scale, the information are well expressed. therefore, we can simply amalgamating the data. iv. urban planning information have time state
考慮城市規劃編制迭代的過程，城市規劃數據具有時態屬性，為此必須建立元數據庫，實現版本控制和城市規劃歷史數據跟蹤。 -
Digital down - converter ( ddc ) is one of the key technologies used by sdr receiver. the ddc module is a data processing part, following the ad sampler. the main function of ddc is extracting narrow - band data from broad - band data which is digitalized by ad sampler, down - converting these data to base - band, and decreasing data rate as well
Ddc數字下變頻器技術作為軟體無線電中的核心技術，是緊跟在ad采樣后的一個處理模塊，他的主要功能是從輸入的寬帶高速數字信號中提取所需的窄帶信號，將其下變頻為數字零中頻，並降低數據的速率。 -
Where realized system ' s main module and the key - technologies used in the system design, such as applying data - base as a container, materials in researching main mutual interfaces and designing system, researching link - edit - module and setting up multimedia component library etc. in this thesis, intelligent courseware platform was imported and unique opinions for developing platform technology was put forward
論文重點討論了系統各主要模塊的實現及其關鍵技術，如在交互界面的研究中導入數據庫來作為多種媒體素材的容器，對連接編輯模塊的研究，建立了多媒體組件庫等等。在本系統中引入了智能化課件平臺，為平臺技術的開發和發展提出了獨特的見解。 -
In the paper, the prototype of the navigation platform of the internet - based manufacturing is introduced, and its main parts are studied, such as the design and implement of the key data base and the products and parts classification system
本文介紹了作者研製的基於網路製造的導航臺原型，並對其主要部分進行了研究和探討，如核心數據庫與產品和零部件關鍵詞分類系統的設計和實施方法。 -
Sponsored by china national 863 / cims project " event - based integrated quality system modeling and prototype technology research " ( no. 863 - 511 - 9844 - 012 ) ， heilongjiang province cad application project " furniture series of products computer aided design " and project " the network - based product design center of furniture manufacturing industry " ( no. 2001ba201a0605 ) ， which is a subproject of the tenth - five national key project " network - based manufacturing platform " ( no. 2001ba201a06 ) ， this thesis made a systemic research on some key technologies of ncd ， such as the network model ， the collaborative design - supporting product data management and the evaluation of collaborative design quality and so on. with the furniture industry as the object of application ， this thesis applied the research achievements to furniture enterprises ， established the platform of the ncd in furniture manufacturing industry and settled the base of network - based design for furniture enterprises. this research has important theoretical significance and practical value
本文結合所承擔的國家863 / cims項目「基於『事件』的集成質量系統建模及原型技術研究」 （編號： 863 - 511 - 9844 - 012 ） 、黑龍江省重點cad應用工程項目「傢具系列產品計算機輔助設計」和國家十五科技攻關項目「網路化製造平臺」 （項目編號： 2001ba201a06 ）的子項目「傢具製造業產品網路化設計中心」 （子項目編號： 2001ba201a0605 ） ，對網路化協同設計的網路模型、支持協同設計的產品數據管理和協同設計質量的評價等關鍵技術進行了深入系統的研究，並以傢具企業為主要應用對象，將研究的成果應用於傢具企業中，建立了傢具製造業產品網路化協同設計平臺，為傢具企業實施網路化協同設計奠定了基礎，其研究成果具有重要的理論意義和實用價值。 -
In this thesis, the authors analyze the present situation of the development of county economy in different periods and try to find out their characteristics and key issues affecting the development. case analysis was carried out by selecting three pilot counties from south, central and north of jiangsu province. the authors investigated the major positive and negative factors affecting county econ omy development on the base of case studies and second - hand data analysis
本文從不同階段縣域經濟發展現狀對比分析入手，找到不同發展階段中縣域經濟的運行特點和發展著力點；以江蘇的蘇南、蘇中和蘇北不同區域的典型縣市為例，在實地走訪調查的基礎上，主要採用二手資料分析的方法，研究縣域經濟發展的主要推進因子和制約因子；最後就新形勢下縣域經濟發展提出建議。 -
Finally, modern technology on computer, data base and network is put into full use to create an internet - based item bank and test system model and the key techniques to realize the system are discussed
最後利用現代計算機技術、數據庫技術、網路技術，給出了一個基於internet的網路題庫和網上測試系統模型，並對其實現的關鍵技術進行了探討。 -
Algorithms of curvature estimation and data simplification of scattered point cloud data are studied. local surface curvature properties on scattered - point data are estimated using a parametric quadric surface approximation, and the key step is local base surface parameteration method which resolves parameteration of scattered - point data. an algorithm is presented for simplifying the scattered point cloud data based on curvature restriction
實例表明，本文演算法的簡化結果既較好地保留了形狀特徵，同時使點的分佈以點雲密集的強制保留區為中心，在向附近擴散的過程中逐漸變稀，避免簡化后點雲的局部過密或局部過稀的情況。 -
In order to develop the product networked marketing and customize system for electric gauge and controller manufacturing enterprises, in this thesis we study on several key technologies. they are data - base technology 、 business logic technology and the realization of client technology
為了開發計控電器生產企業產品的網路化銷售與定製系統，論文圍繞系統開發中的核心技術問題，進行了系統數據庫技術、業務邏輯處理技術、客戶端實現技術等相應關鍵技術的研究。 -
On the bases of discussing the advantages and key technology to access ddb through the mobile agent technology, the writer has utilized mobile agent technology design distributed data base system in the subsystem of information management of military supplies of some armed division, and has realized mobile agent visit to distributed data base under ibm aglet development environment
簡要介紹了分散式數據庫的系統結構模型，討論了移動agent技術實現分散式數據庫訪問的優點和關鍵技術，並且在武警某師軍需信息管理子系統中利用移動agent技術設計分散式數據庫系統，在ibmaglet開發環境下實現了移動agent對分散式數據庫的訪問。 -
Secondly, apart from the spatial character, the operational data of sea area use management are characterized by multi - source, multiple scale, and coordinate, complex type and large quantity, etc, so this paper has laid emphasis on studying the spatial data model and the data framework related to the management of sea area use, solved a series of key technical problems such as check and correction, organization and structrue, quality management and standard norms for the geographical sapce data associated with the management of sea area use, proposed various practical and effective ways of storing and managing spatial and non - spatial data and established the spatial data base system for the management of sea area use
其次，由於海域使用管理業務數據除空間特性外，還具有多源、多尺度、多坐標、類型復雜、數據量大等特徵，因此，本文重點研究了與海域使用管理相關的空間數據模型與數據框架，解決了海域使用管理相關地理空間數據的復合與訂正、組織與結構、質量管理與標準規范等一系列關鍵技術問題，並提出了切實有效的空間數據和非空間數據的不同的存儲、管理方式，建立了海域使用管理空間數據庫系統。
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