Meanwhile , regarding to the network communication status , the data exchange solution of crtvudoeaams adopts two ways : the non - permanence and synchronization way and the permanence and asynchronism way 同时考虑到网络的通信状况,教务管理系统的数据交换解决方案采用非持久同步和持久异步两种方式。
To be used flexibly in wireless access networks , and get balance of compression efficiency and robustness , this project implements assistant functions , including the three compression modes and transitions between them , compression states and decompression states , and making use of feedback mechanism to make a communication bridge between compressor and de - compressor . because this project will use on wireless links , packets loss on it will induce the asynchronisms between the context of de - compressor and compressor and lead to errors in decompression 同时,为了rohc在无线接入网中的灵活应用,并且保证较高的压缩效率和较好的健壮性,课题同时实现了rohc所提供的丰富的辅助功能,如完整实现u 、 o 、 r三种模式及模式之间的互换;分别完整实现压缩及解压缩三种状态的转换;合理利用反馈机制,以加强压缩方与解压缩方之间的沟通等。
Considering the np - complete problem , how to get the approximate optimized scheme of job - shop scheduling , and aimed at improving the efficiency of products and taking good advantage of concurrence , asynchronism , distributing and juxtaposition in multi - products and devices processing , we could divide the working procedures into the attached one which has the only precursor and subsequence and unattached one by analyzing working flow chart of job - shop , that is the working procedures are divided into two types , then the bf and the ff methods about memory scheduling in os are applied , therefore a new approximate optimized scheme is presented in the paper which could solve the common job - shop scheduling . namely , the acpm and the bfsm are applied to the classified and grouped working procedures considering the compact of the procedures and practical examples approved it . the results we analyzing and tested show that it is better than the heuristic algorithm common used , for less restriction terms , more satisfying algorithm complexity and better optimized results 针对job - shop调度问题求最优解算法这一npc问题,本文以充分发挥多产品、多设备加工所具有并发性、异步性、分布性和并行性的加工优势,从而提高产品的加工效率为目标,对job - shop调度问题的工艺图进行适当分解,使工序在一定时间段或是为具有唯一紧前、紧后相关工序或是为独立工序,即将工序分两类,再结合操作系统中内存调度的最佳适应( bf )调度方法和首次适应( ff )调度方法的先进思想,通过分析提出了一种解决一般job - shop调度问题的全新近优解方案:在考虑关键设备上工序尽量紧凑的前提下,将工序分类、对这两类工序分批采用拟关键路径法( acpm )和最佳适应调度方法( bfsm )安排工序的算法,用实例加以验证,并给出结果甘特图。
Besides , this paper studies the wireless optical code division multiple access ( w - ocdma ) technology whereas its anti - jamming , security and asynchronism . based on the w - ocdma communication technology , we analyzes ocdma mac protocol , studies the protocol theory , access mechanism in detail , and models the throughput performance , simulates and analyzes the performance ( 3 )鉴于无线光码分多址( wirelessopticalcodedivisionmultipleaccess , w - ocdma )技术的抗干扰、保密和随机异步接入的优点,本文分析了基于ocdma接入的无线光局域网mac协议,阐述了协议原理和接入机制,用马尔可夫模型对吞吐量性能进行了建模和仿真计算。
As a more flexible and complex mobile computing environment , mobile database comes into existence . nowadays how to construct a mobile database based on traditional distributed database technologies , which can adapt the wireless environment , has been a new direction to database researches the thesis particularly studies the status of mobile database , the thesis firstly discusses architectures , characteristics , some key technologies . and the thesis presents a data consistency maintenance solution based on bi - asynchronism data replication technology ( b - adr ) , which well maintains data consistency in mobile database environment 论文对移动数据库技术的发展现状进行了广泛论证,深入研究了移动计算环境下的分布式系统,移动数据库的典型系统模型,讨论了移动数据库系统体系结构、特点及其应用前景,移动数据库的关键技术,并针对数据复制创造性的提出了一种基于双向异步复制的数据一致性解决方案( b - adr ) ,较好的解决了移动数据库领域的数据一致性问题。
With the background of studying copper alloy bar for asynchronism traction electromotor , a kind of copper bar and its preparation techniques are developed , and its hardness , tensile properties , electrical properties and microstructure are studied . furthermore , the rule of structure and properties changing with heat - treatment is especially illustrated . the results show : the first , there is obvious aging strengthening effect in cu - 10zn - 0 . 8 ( cr , zr ) alloy 论文以城市轻轨列车异步牵引电机用铜合金导条为研究背景,研究开发了cu - 10zn - 0 . 8 ( cr , zr )合命导条的制备工艺,测试了导条的硬度、拉伸力学性能和导电性能,观察了导条的金相组织和电镜显微组织,重点研究了时效处理对导条组织、力学性能和导电性能的影响,得出了导条组织、性能随时效温度和时效时间变化的规律。
By adopting the layered architecture , two - lever state machine , message queue based publish / subscribe pattern and rules expressed in xml , by using technologies involved in activex , xml and distributed components , icall - aldp provides application developer with supports as rule - based flow process , asynchronism and concurrent message process , external system communication - oriented protocol - transform , and dynamic expand of components 通过使用activex控件的动态加载机制、连接外部系统的通信协议转换机制和基于元数据的柔性机制,增强了平台的可扩展性。在设计和实现中采用了activex 、 xml 、设计模式以及分布式构件等技术,实现了基于规则的流程处理、支持并发与异步的消息处理以及构件动态扩展的功能。
Combining characteristics of mobile database technologies with traditional duplication methods of distributed databases , b - adr solution realizes the bi - asynchronism data replication between mobile clients and servers with sql server transaction - logs - tables and data broadcasting technologies . there are two links in this solution . as for the up link , it replicates from mobile clients to servers by sql server transaction - logs - tables B - adr将传统分布式系统的数据复制方法与移动数据库系统的特点相结合,利用基于分布式关系数据库的事务日志表和数据广播技术,来实现移动客户端和服务器端后台数据库系统间的双向异步复制。
In order to increase the utilization of transformer core and reduce the number of transformers , the two - transisteor integrated - magnetics forward converter is studied in this paper . the phenomena about magnetic deviation due to asynchronism of duty cycle and other parameters is analyed , and the converter works normally although there is magnetic deviation . the working principle of circling current is analyed , and a improving circuit is present to decrease the circling current 分析了双管正激磁集成变换器的环流产生机理,提出了一种减小环流的方法;研究了占空比等参数不一致导致的磁芯偏磁问题,磁芯存在单向磁化现象,但不会出现单向磁饱和,变换器仍能稳定工作。
The major work is as following : the main problem that the encrypt subsystem of hospitalization insurance system is analyzed , and the scheme using dsp technology to realize encrypt arithmetic is brought out . the data encrypt card using dsp chip , pci interface chip , asynchronism fifo chip and epld that realize the control of the data encrypt card is designed and implemented 主要做了以下几方面工作: ( 1 )分析了医疗保险信息系统加密子系统需要解决的主要问题,提出了采用dsp技术实现加解密算法的数据加密卡解决方案; ( 2 )数据加解密卡的硬件设计和实现。