查询词典 distributed data base

Distributed database system is a main research direction in the database field. Maintaining the data consistency is a critical technical problem in the distributed database system .

分布式数据库系统是数据库领域中的一个主要研究方向，数据一致性维护是分布式数据库系统中的一个非常关键的技术问题。

Further more, the thesis lucubrates some key techniques: aiming at the management of the distributed objects, we skillfully construct the isomorphic project object tree for the real projects structure by using the CORBA naming service, and laconically and effectively implement the management of the services and modules by using the location service. And we also propose a design which uses CORBA event service and Borland MIDAS to implement the distributed data service in a creative way and analyze the advantages and disadvantages of this design at the same time.

并针对一些关键技术做了深入的讨论和分析，例如针对整个系统的分布式对象的管理，巧妙地借用CORBA的名字服务构造了同构于实际工程组织的工程对象树，同时使用定位服务简洁而有效的实现了对服务和模块的管理；针对分布式数据库的实现，创造性地提出了一种使用CORBA事件服务和Borland MIDAS组件来实现分布式数据服务的设计，并实现了这个设计，同时分析了这种设计的优劣。

In a scatter diagram, when the dots are distributed roughly along an ascending tendency, there is a positive correlation between the two sets of data. On the contrary, when the dots are distributed rough along a descending tendency, there is a negative correlation. However, when the dots scatter irregularly without a pattern, there is no obvious correlation.

在散点图中，如果点的分布大致上是由左下方至右上方，图像表示两组数据间有一个正相关关系；如果点的分布大致上是由左上方至右下方，图像表示两组数据间有一个负相关关系；如果点的分布大致上是不规则/凌乱地分布，图像表示两组数据间没有一个明显的关系。

In this thesis, the ISA and the Agent technologyies are deeply researched. According to requirements of ISA and characteristics of distributed information systems, the design scheme is presented and the audit systems architecture is constructed, which can collect distributed and multi-layer data and surpervise the condition of information system intelligently. This architecture has the better agileness and expansibility.

本文在深入研究信息系统审计技术和Agent技术的基础上，根据信息系统审计的需求和分布式信息系统的特点，基于多Agent技术，提出了审计系统的设计方案，构建了能够进行分布式、多层次数据采集和智能监测的审计系统体系结构，具有良好的灵活性和可扩展性。

To solve this problem of keeping date consistence in the heterochronous environment, the paper puts forward a synchronous updating system model, which applied Web Service to capture, store and then transfer updated things in the homogeneous distributed database system and farther implement the system's model of data synchronization, In the design of this model, the concurrency control of distributed things and the method of failure inspection are discussed and solved successfully.

针对异构或异质环境下保持数据一致性的问题，给出一个在分布式异质数据库中，通过Web Service技术，对数据库更新事务进行捕捉、存储后转发，进而实现数据同步更新的系统模型。

There are three problems that should be deliberated when constructing a typical distributed virtual environment: 1 the representation of complex model in virtual environment, usually there are many entities and data in environment that should be recognized carefully. 2 the network communication, update and synchronal information is needed for variable entities are distributed in different computers linked by network. 3 the controlling of participant's behavior.

一是复杂模型的表达，通常这样的系统中包含复杂的较大规模的场景数据以及为数众多的实体，需要对这些实体加以组织；二是网络通信，由于环境中存在诸多可变因素，需要通知其它节点机做相应的刷新和同步，同时，分布的计算单元之间也需要交换消息或数据；三是参与者行为的控制。

The chief points of this paper are summered as follows: Firstly, the dynamic rule-adjusting algorithms in Snort is analyzed. Secondly, some methods to improve the algorithms are discussed and the results of experiment are obtained. Thirdly, a kind of anomaly detection models using association rule mining algorithm is put forward, and the improvements of Apriori algorithm are pointed out. Fourthly, the advantage of the new algorithm and the feasibility of this model are testified. Lastly, a framework of distributed intrusion detection system based on data mining is designed, and distributed cooperation concepts and many detecting methods are adopted in order to guarantee the accuracy and completeness of the detecting system.

论文的主要工作如下：本文分析了Snort中的动态规则调整算法，讨论了一些改进的思路，给出了实验结果；提出了一种运用关联规则挖掘算法进行异常检测的模型，根据入侵检测的实际情况对Apriori算法进行了改进，通过实验证实了改进算法的优越性和模型的可行性；设计了一种基于数据挖掘的分布式入侵检测系统框架，采用分布式协作思想，结合多种检测方法，保证了系统检测的准确性和完备性。

Other topics, outside the scope of this paper are versions, data update problems regarding the shared schemas, optimization of distributed query pro- cessing, transaction management and distributed concurrency control that are subjects of forthcoming papers.

其他主题范围之外，本文版本、数据更新问题对于共享模式，优化的分布式查询亲分布、交易管理、分布式并发控制，即将来临的论文主题。

Data applications are set up resources for interoperable model of heterogeneous database environment or file system connected to achieve implementation of the middleware connectivity; at Distributed System, the essential data are concentrated in the data storage server, they can be a relationship between the type, compound document type, with a variety of multimedia-based storage format, or are encrypted or compressed storage, such middleware for virtual buffer at the network access, format conversion, extracting and other convenient

是为了建立数据应用资源互操作的模式，对异构环境下的数据库实现联接或文件系统实现联接的中间件；在分布式系统中，重要的数据都集中存放在数据服务器中，它们可以是关系型的、复合文档型、具有各种存放格式的多媒体型，或者是经过加密或压缩存放的，这类中间件将为在网络上虚拟缓冲存取、格式转换、解压等带来方便

The article studied and analyzed the data of the investigative fishing vessel from 2002 to 2005, fisheries statistical data of Zhoushan and sequential monitoring data of Mackerel and Scad from marine fisheries research institute of Zhejiang Province. The results showed that the fishing ground of Mackerel and Scad mainly distributed in 28°-32°N, 122°-125°E, and fishing period was usually July to September, yearly average ratio of Mackerel and scad was 98.97 % from 2002 to 2005. According to the early rearch result of others, the fishery resources of Mackerel and Scad are 120 thousand tons.

对灯光围网调查船2002~2005年的渔业生产调查资料、舟山市渔业统计资料和浙江省海洋水产研究所历年来的上层鱼监测资料进行了研究和分析，结果表明：2002~2005年，浙江省群众灯光围网渔业的作业渔场主要集中在28°~32°N、122°~125°E之间的海域，渔期一般为每年的7~9月；鲐鲹鱼占总渔获的年均比例为98.97%；根据历史资料粗略推算，调查海域鲐鲹鱼等中上层鱼类的资源量约为12×10^4t，最大持续产量为5.8~6.7t，最佳捕捞船数315组左右。

Bob Eckert has been chairman and chief executive of Mattel for eight years.

美泰董事长兼首席执行官鲍勃·埃克尔特在任已8年。

The outlook for honors and disgraces carries on and surpasses the traditional outlook for honors and disgraces theoretically, and carries on and develops the theory of construction of socialist mora...

社会主义荣辱观的提出在理论上是对传统荣辱观的一次继承和超越，是对社会主义道德建设理论的继承和发展，在实践上有利于形成良好的社会风尚。