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Combined with National Nature Science Fund project"Study on Modular Flexible Machining Cell Oriented Concurrent Design Software Tools", and aimed at Flexible Transfer Line product design for prism type parts, this dissertation systematically analyze the implement principle of computer aided concurrent design for complicated mechanical product.

本文结合国家自然科学基金项目"模块化柔性加工单元并行设计软工具的研究"(编号59575037),以棱体类零件柔性生产线(Flexible Transfer Line,简称FTL)产品设计为研究对象,系统地分析了复杂机械产品计算机辅助并行设计的实施机理,并对以下几方面的关键技术进行了深入地研究: 1。

The CSD algorithm is shown to be efficient design method for complex system in parallel, and can search out better design for mixed continuous/discrete system in very reasonable number of system analysis compared to traditional optimization method, and is able to deal with the issue of dynamic design requirements.

并行子空间设计算法不仅有效地实现了并行设计思想,而且与传统的优化算法相比,CSD算法降低飞机系统分析的次数,找到系统全局最优解的概率也较高。另外,它还能成功地解决含有离散/连续混合变量的设计优化问题,以及具有处理工程设计中设计要求动态变化的能力。

Which are important in object-relational databases, and how to translate the select-from-where cause into representations of monoid system are discussed. We take into account the onedimensional and multidimensional data partition methods, physical storage structures and further more how to parallelize them.

本文讨论了对象-关系型数据库中的重要数据类型-集类型如表、集合等的有效实现;讨论了select-from-where查询语句在monoid系统中的表示方法,给出了多种一维/多维数据分布方法、物理存储结构及其并行化方法;系统地分析、设计并实现了并行数据库系统的数据库原语操作及其基本并行算法。

Several problems are resolved in the system, such as the data access in the memory, parallel file access from disk, and the replacement of file data.

解决了并行文件访问的难点:内存中数据的读写,并行化磁盘读写和文件数据的替换,性能测试表明在多用户并行处理的环境中,Parfsnow++有效地提高了系统性能,特别是在文件数据的共享,文件数据的替换,以及使用大容量的统一内存对文件数据的存取等方面。

ABSTRACT One of the most important problems of parallel computers is how to effectively make use of parallel computer and how to measure th...

并行计算机最重要的问题之一是如何有效地利用并行计算机和如何准确地度量它们的性能。

ABSTRACT One of the most important problems of parallel computers is how to effectively make use of parallel computer and how to measure their performance accurately.

并行计算机最重要的问题之一是如何有效地利用并行计算机和如何准确地度量它们的性能。

The paper holds the idea that, parallel bus can;t adapt to high-speed transfers due to self-limitations, and high-speed serial point-to-point bus will substitute for traditional parallel bus; data transfer will not be carried out simply by drive circuit and parallel bus, but by special high-speed serial bus; the traditional mode of single bus loading multi-device is disappearing, and a centralized switch module is replacing the bus function in a mode of one switch module connecting all devices via high-speed point to point serial bus.

文章认为并行总线由于自身缺陷,已经不适合进行高速传输,高速串行点对点连接将代替传统的并行接口;数据交换也不再是简单地通过驱动电路和并行数据线进行,而是通过特殊的串行高速总线连接;传统的在一条总线上同时挂载多个设备的模式正逐渐消亡,总线功能已被一个集中式的交换模块取代,而交换模块和各个设备都是通过高速串行点对点的方式进行连接。

High precision format, unstructured dynamic mesh with a large displacement and multi-species gas flows were computationally expensive, the problem of resourceless and inefficient of single computer appeared. Parallel arithmetic based on PC-Cluster system for the oblique detonation wave flow and the muzzle flow include high speed projectile were discussed. The results proved that the rationality of parallel arithmetic provided a new method to simulate the complex chemical reaction flows. The present code represents a validated, efficient and versatile tool developed for the simulation of hypersonic multi-species chemical non-equilibrium flows.

高精度计算格式、化学反应源项的刚性和大位移的运动边界处理都给计算和存储带来了沉重的负担,单机资源不足和计算时间长的问题凸现,利用PC机和局域网资源建立分布存储式并行计算系统,并基于非结构动网格和分区算法开发了复杂化学反应流场数值模拟的并行计算程序,对高速飞行实验弹丸诱导的斜爆轰波流场和含有大位移动边界的膛口燃气射流场进行了并行模拟,有效地缩短了计算时间,扩展了计算规模,为复杂化学反应流数值模拟研究提供了新的手段。

After packing the parallel executable tasks in the task graph, the PEPs are generated in which the communication and synchronization primitives are inserted automatically.

对该任务图中的可并行执行任务进行并行封装,形成若干可并行执行包,并在其中自动地插入通信与同步原语。

All algorithms presented in this dissertation have very good results for their respective production lines. They can solve the parallel machines production line scheduling problem and the re-entrant production line scheduling problem quite well Among these algorithms, parallel machines production line scheduling algorithms can be used not only for production lines but also for parallel computation, and so on.

本文提出的各种算法对相应的生产线均有很好的调度效果,能够很好地解决并行机器生产线和可重入式生产线的优化调度问题,其中并行机器生产线调度算法不仅对生产线,而且在并行计算等领域均有很好的应用前景。

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推荐网络例句

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸,那乌黑、忧郁的眼睛,她便会相信,他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失

But because of its youthful corporate culture—most people are hustled out of the door in their mid-40s—it had no one to send.

但是因为该公司年轻的企业文化——大多数员工在40来岁的时候都被请出公司——一时间没有好的人选。