查询词典 data base key

Most of the GIS are centered on spatial data.But they have poor ability to express objective geographical world intactly, perform high-level space analysis and put forward the decision scheme directly.The key reason is the traditional spatial data model cant describe the world exactly.

另一方面，今天的GIS已经具备了较强的数据存储、管理功能，但目前大多数GIS仍然是以数据为中心，在完整表达客观地理世界、进行高层次的空间分析和直接提出决策方案的能力方面还远远不够，导致这种情况的根本原因在于现有GIS的数据模型不能准确的表达客观地理世界。

It includes online analysis of data warehouse and data mining, constructing analyzed CRM system, design and application of effective mining algorithm, and OLAM visualization. In this thesis, some key technologies of actualizing CRM system in manufacturing are discussed in details.

本文探讨了制造行业的客户关系管理系统实施过程中的若干关键技术，同时对客户关系管理的OLAM技术及其可视化实现进行了研究，开发了基于OLAM的客户分析挖掘原型系统。

ABSTRACT This thesis deals with the data management problems in CAD/CAM system and develops a new CAD/CAM data management system——PORR, some of the key techniques of the system are discussed in detail.

本文工作主要是围绕着解决CAD/CAM系统中数据管理问题展开的，提出了一个新型的面向CAD/CAM的数据管理系统——PORR，并详细论述了其中几个关键技术的设计与实现问题。

Steg B(superscript +)-Tree, which uses steganographic technologies to overcome above mentioned weakness is presented by hiding the existence of data so that an adversary could get no information about whether the protected data ever exists without correct object name and access key.

介绍一种新的着重于隐藏数据的存在性的加密手段－隐文加密（Steganography，隐写术）来对重要文件的存储进行加密，该方法采用隐文B树Steg B(上标+ Tree建立UNIX系统的文件索引，并通过隐藏表将隐文B树索引隐蔽起来，使攻击者无法知道重要信息的存在，从而使要保护的信息更安全。

Customer Relationship Management that can supply customers resources and involved data analysis is the key, But a huge amount of data prevent us from discovering valuable customer mode, so the research of knowledge discovering system applied in Customer Relationship Management to class reasonably customers is very significative. Now, there are many methods classing customers applied in Customer Relationship Management.

能够提供客户资源及相关数据分析的客户关系管理系统就成为焦点，但是客户关系管理系统中庞大的数据量阻碍了我们从中发现有价值的客户模式，因此研究适用于客户关系管理的知识发现系统，从而合理地实现客户分类，具有十分重要的理论意义和实用价值。

Housing vacancy rate is a key data on real estate bubble, abroad, the data is "iron that clinches it abuse," they are obvious as well, gives reference for comment.

房屋空置率是谈论房产泡沫的一个关键数据，在国外，这个数据是&铁板上钉钉儿&，它们都明摆着，给人参考，供人评说。

The key data content of this system operation is defied by the data analysis .

通过数据分析，明确了系统操作的核心数据内容，并提出了解决大量数据发布、存储的基本设想。

One of the key features of DataFort is that it encrypts data before the data is written to disc or tape.

其中一个关键的特点datafort是，它加密的数据之前，数据写入光盘或磁带上。

Distributed product data management is one of the key techniques for the implementation of GAMS. This paper analyzes the special characteristics of DPDM. A DPDM framework and a layered data management model in the distributed environment are presented based on the Multi Server cooperation mode. Several related techniques are proposed including object oriented distributed database m...

通过对敏捷制造环境下的分布式产品数据管理系统的分析和研究，设计了 DPDM系统的多服务器协同框架结构，提出了分层数据存储管理模型，探讨了动态联盟环境下实现分布式产品数据管理的建模技术、面向对象的分布式数据库管理技术、基于 Internet环境的 DPDM系统集成和分布式对象的互操作技术等

Block cipher is an important branch of cryptology, it has many attractive features such as high rates, easy for standardization, and efficient for both software and hardware implementations. Block ciphers are usually core components in information and Internet security for data encryption, data signature, authentication and key management.

分组密码是密码学的一个重要分支，它具有速度快、易于标准化和便于软硬件实现等特点，通常是信息与网络安全中实现数据加密、数字签名、认证及密钥管理的核心体制。

He has to relate with three women in the movie, and yet remain implicitly faithful to the unseen Lucinda.

让克劳德布里亚里成功地饰演试验了一个难度很大的角色：和三个女人打交道，但还要底下对观众未曾谋面的卢馨达保持忠诚。

The experiment was conducted to study effects of inulin on the growth performance, indices of immune organs and serum immunoglobulin of laying chicklings as well as the performance of inulin which replaced the antibiotics in diets by adding 0.2%, 0.4% and 0.8% of inulin, respectively.

试验旨在通过在蛋用雏鸡日粮中添加0.2%、0.4%和0.8%的菊粉，研究菊粉对蛋雏鸡生长性能、免疫器官指数和血清免疫球蛋白的影响，以及菊粉替代抗生素对蛋雏鸡的应用效果。