查询词典 distributed data base

Global transaction management Global transaction management consists of global serializability, global atomicity and recovery, global deadlock checker, etc. In distributed data resources management, the complexity of local data sources increases the difficulty of global transaction management.

分布数据资源管理中的全局事务管理通过对事务管理的关键问题的分析，针对分布数据资源管理中数据源在事务处理能力中的巨大差异，提出了给每一个局部数据源包装器添加一些事务处理的功能，让包装器针对特定数据源的具体情况完成部分全局子事务的并发控制和恢复管理，使得在全局管理层可以使用二阶段锁进行并发控制和使用二阶段提交进行事务恢复，并使用超时法进行死锁检测，从而达到分数据资源的全局事务管理。

A distributed parallelized algorithm is described by means of static data d istribution after researching into the sequential algorithm of the global atmos pheric data objective analysis system.

通过对全球气象资料客观分析系统串行算法的研究，提出了一种静态分配数据的分布式并行算法。

Firstly, the model of distributed single-hop fully-connected FH-PRNs for missile systems is developed in this dissertation, which fully describes the physical and link level characteristics of the network. Common-transmitter-based spreading codes protocol and unslotted ALOHA channel access protocol are adopted, considering two types of services, i. e. Unacknowledged Data Packet and Acknowledged Data Packet.

首先，本文建立了战术导弹武器系统分布式单跳全连接跳频分组无线网的网络模型，所建模型充分地反映了网络的物理层和链路层特性，采用了公共码加发射码的扩频码协议及异步非时隙ALOHA信道访问协议，考虑了两类业务的情况，即无应答数据分组和有应答数据分组。

As reason was, this dissertation discusses that GSM network is adopted to communicate the data between the collection locale and the management center and founds a distributed collection data system based on GSM network.

针对以上种种情况，本文把发展比较完善的GSM网络引入到分布式数据采集系统当中，利用其短消息业务和数据业务实现数据的远程传输。

After deployment, nodes in each corona transmit data according to the transmission range list. In non-uniform node distribution, we need DETL (Distributed algorithm for energy-efficient transmission range list) to optimize the list derived from CETT after nodes deployment. In DETL, in order to balance the energy consumption of all coronas, each corona adaptively adjusts its strategy of sending and receiving data.

在非均匀节点分布的情况下，提出了一种分布式的优化算法—DETL，在节点部署后优化从CETT算法获得的传输距离序列，算法中为了能够尽可能平衡各环的能量消耗，各环自适应地调整它们发送和接收数据的策略。

Synthetically considering these characteristics, the method of freeway management and control are presented according to four aspects: system objective orientation and concept design, system demand and requirement analysis, system data management and network structure, traffic control and accident detecting theory as well as its application. Function and structure of system are delimitated from the point view of integration. Construction and function demand of subsystem are analyzed and basic implement projects are presented. In this thesis, system data flow and management method and target which based on system network topology structure and equipment demand are described. Traffic modeling ideology and the process of making dynamic model as well as accident detecting program are presented with centralized and distributed traffic control theory in detail, then freeway ramp control theory which based on predictive model and its theoretic pattern are explored. Finally, based on the object oriented programming, program of accident detecting and checking on freeway is developed by using visual C++ as tool.

论文综合考虑高速公路交通管理系统的上述特征，分别从系统目标定位及概念设计、系统需求分析、系统数据管理及网络结构分析、交通控制与交通事件检测理论与应用四个层面，对高速公路交通管理与控制问题进行了系统阐述，界定了系统的功能及各功能的实现要求，并从系统集成角度划分了系统的结构；分析了各子系统的信息、功能、建设等方面的需求，给出了基本实施方案要求；对系统数据流程进行了描述和梳理，提出了数据管理的方法、目标及措施，分析、设计了系统网络拓扑结构及设备需求；阐述了交通模型的建模思想和动态交通模型的建立过程，对集中式和分散式全局交通控制理论进行了详细的分析，提出了基于预测的高速公路匝道控制理论，并对理论模式及相关的问题进行了研究，分析了高速公路事件检测系统，并采用面向对象的编程思想，以Visual C++为编写工具，开发了高速公路事件检测系统分析软件。

Disk latency is often the single largest factor in elongating application response times, especially when large amounts of random data need to be accessed quickly, or data is distributed across many servers.

磁盘延迟通常是使应用响应时间变长的最大原因，尤其是当需要快速随机访问大量数据或数据分布在许多服务器上的时候。

Moreover, A hybrid algorithm, ALHybrid, which is made of the algorithm LIDBSO and the algorithm AprioriIpv, is designed. Two algorithm, MQC_Apriori and MQC_LIDBSO, are given to mining multiple level quantitative association rules with item constrains. Two algorithm, PMARⅡ and PMARⅢ, which are based on different sequential mining algorithms, are given for parallelling mining association rules. In order to solve the mining association rules problem when we add a set of data to a database or delete a set of data from a database, two incremental updating algorithm, EUAR and EUAR, are given. Three incremental updating algorithm for association rules mining, DIUAⅠ, DIUAⅡ and DIUAⅢ, are dedigned to solve the three kinds of association rules incremental updating problem in distributed databases.

另外，文中还设计了一个算法LIDBSO与算法AprioriIpv相结合的混合采掘算法ALHybrid；对于多层次、带约束、多值属性关联规则的采掘问题，给出了两个采掘算法：算法MQC_Apriori和算法MQC_LIDBSO；在关联规则的并行采掘方面，还设计了两个基于不同顺序关联规则采掘算法的并行算法：算法PMARⅡ和算法PMARⅢ；在关联规则的增量式更新问题上，还给出了两个改进算法：算法EUAR和算法EUARˉ，分别用于解决当数据库增加或删除一个数据集合时的关联规则增量式更新问题；针对分布式数据库中的关联规则增量式更新的三类问题，提出了三个增量式更新算法：算法DIUA Ⅰ、算法DIUAⅡ和算法DIUAⅢ。

Distributed interactive simulation ; data unit protocol ; protocol data unit ; exercise ; transmission bands

分布交互仿真；数据单元协议；协议数据单元；训练；带宽资源

Ticket printing based on Internet is one of the key problems. In allusion to the insufficient of conventional printing solution based on Socket and COM component, the paper designed distributed ticket-printing solution with Web Services and Windows Form technique, which eliminate the affect of Firewalls block during remote ticket-data transferring. Besides, the solution utilizes adequately the standard coding rules of SOAP message to customize data structure of ticket.

基于Internet的票券打印是系统需要解决的关键性问题之一，总结传统的基于Socket和COM组件的印票方案所存在的不足，结合Web Services技术和Windows Form技术实现了分布式的票券打印，解决了远程票券传输时由于防火墙的阻隔作用而带来的问题，并充分利用SOAP消息规范的编码规则设计了票券数据结构。

Molecular Distillation is a kind of high vacuum distillation method, which is suitable for the separation of high boiling, heat sensitivity and viscidity products.

分子蒸馏技术是一种在高真空条件下进行的连续蒸馏过程，适合于分离高沸点、热敏性及具有生物活性的混合物。

They are to the Noughties what yuppies were to the Eighties .

那在六十年代是时髦的，但在八十年代肯定是过时了