共查询到20条相似文献，搜索用时 375 毫秒
1.
鄂国康 《上海大学学报(英文版)》1999,3(1):25-29
１ Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｔｈｅｓｔｏｃｈａｓｔｉｃｄｉｆｆｅｒｅｎｔｉａｌｅｑｕａｔｉｏｎｓ（ＳＤＥ）ａｒｅｕｓｅｄｉｎｍａｎｙａｒｅａｓｏｆｓｃｉｅｎｃｅａｎｄｅｎｇｉｎｅｅｒｉｎｇ．ＴｈｅｍａｉｎｐｕｒｐｏｓｅｆｏｒｓｏｌｖｉｎｇｐｒｏｂｌｅｍｓｗｉｔｈＳＤＥｉｓｔｏｏｂｔａｉｎｔｈｅｐｒｏｂａｂｉｌｉｔｙｄｅｎｓｉｔｙｆｕｎｃｔｉｏｎ（ＰＤＦ）ｏｆｔｈｅｓｔａｔｅｖａｒｉａｂｌｅｓｇｏｖｅｒｎｅｄｂｙｔｈｅＳＤＥｂｅｃａｕｓｅｍａｎｙｏｔｈｅｒｓｔａｔｉｓｔｉｃａｌａｎａｌｙｓｉｓａ… 相似文献
2.
M.Tahir Khaleeq Lang Wengpeng He Guoseng 《上海大学学报(英文版)》1998,2(2):127-134
ＮｏｍｅｎｃｌａｔｕｒｅＡＡｒｅａ（ｍ２）ＤｈＨｙｄｒａｕｌｉｃＤｉａｍｅｔｅｒ（ｍ）ＥＥｎｅｒｇｙＣｏｎｔｅｎｔ（Ｊ）ｆＰｒｅｓｓｕｒｅＬｏｓｓＣｏｅｆｉｃｉｅｎｔαＶｏｉｄＦｒａｃｔｉｏｎＨＳｐｅｃｉｆｉｃＥｎｔｈａｌｐｙ（Ｊ／ｋｇ）ＩＩｎｅｒｔ... 相似文献
3.
ZHOU Xi zhao 《上海大学学报(英文版)》1999,3(4)
１ Ｉｎｔｒｏｄｕｃｔｉｏｎ ＳｔａｎｄａｒｄｉｚｅｄＵＥ（Ｕｓｅｒ’ｓＥｑｕｉｌｉｂｒｉｕｍ）ａｓｓｉｇｎｍｅｎｔｉｓａｒｏｕｔｅｃｈｏｉｃｅｐｒｏｂｌｅｍｆｒｏｍｏｒｉｇｉｎｔｏｄｅｓｔｉｎａｔｉｏｎ（ＯＤ）．Ｉｎｅｑｕｉｌｉｂｒｉｕｍ,ｔｈｒｏｕｇｈｔｈｅｃｈｏｓｅｎｒｏｕｔｅｓｃｏｎｎｅｃｔｅｄｗｉｔｈＯＤｏｎｅｗｉｌｌｓｐｅｎｄｔｈｅｓａｍｅｔｒａｖｅｌｔｉｍｅ,ｎｏｍｏｒｅｔｈａｎｔｈａｔｔｈｒｏｕｇｈｏｔｈｅｒｒｏｕｔｅｓｗｈｉｃｈｗｅｒｅｎｏｔｃｈｏｓｅｎ． Ｔｈｅｒｅａｒ… 相似文献
4.
ＳｈａｐｅＯｐｔｉｍａｌＤｅｓｉｇｎｏｆＨｙｄｒｏｄｙｎａｍｉｃＢｅａｒｉｎｇＢａｓｅｄｏｎＤｙｎａｍｉｃＣｈａｒａｃｔｅｒｉｓｔｉｃｓＣｈｅｎＹｕｎｆｅｉ（陈云飞）ＱｉａｎＲｕｉｍｉｎｇ（钱瑞明）（ＤｅｐａｒｔｍｅｎｔｏｆＭｅｃｈａｎｉｃａｌＥｎｇ... 相似文献
5.
ＮｏｍｅｎｃｌａｔｕｒｅＦｅｌｅｃｔｒｏｍａｇｎｅｔｉｃｆｏｒｃｅ（ＥＭＦ）Ｂ（Ｂ０）ｍａｇｎｅｔｉｃｆｌｕｘｄｅｎｓｉｔｙ（ＭＦＤ）ＩｃｕｒｅｎｔｉｎｔｈｅｌｉｑｕｉｄｍｅｔａｌＥｖｏｌｔａｇｅｉｎｔｈｅｔｗｏｅｎｄｓｏｆｔｈｅＨａｌｄｅｖｉｃｅＲ... 相似文献
6.
ＡＮＡＤＡＰＴＩＶＥＣＤＭＡＲＡＫＥＲＥＣＥＩＶＥＲＸｕｅＧｕｏｑｉａｎｇ（薛国强）ＣｈｅｎｇＳｈｉｘｉｎ（程时昕）（ＮａｔｉｏｎａｌＣｏｍｍｕｎｉｃａｔｉｏｎｓＲｅｓｅａｒｃｈＬａｂｏｒａｔｏｒｙ）ＡＮＡＤＡＰＴＩＶＥＣＤＭＡＲＡＫＥＲＥＣＥＩＶＥ... 相似文献
7.
ＬＯＣＡＬＩＮＦＬＵＥＮＣＥＡＮＡＬＹＳＩＳＢＡＳＥＤＯＮＴＨＥＫ－ＬＤＩＳＴＡＮＣＥＡＮＤＴＨＥＩＮＦＯＲＭＡＴＩＯＮＤＩＳＴＡＮＣＥＨｕＹｕｅｑｉｎｇ（胡跃清）（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｈｅｍａｔｉｃｓａｎｄｍｅｃｈａｎｉｃｓ）ＬＯＣＡＬＩ... 相似文献
8.
ＦＲＡＣＴＡＬＭＯＲＰＨＯＬＯＧＹＩＮＤＬＡＵＮＤＥＲＭＵＬＴＩＰＡＲＡＭＥＴＥＲＷａｎｇＪｕｎｓｈｅｎｇ（王俊生）；ＷｅｉＹｕ（韦钰）（ＮａｔｉｏｎａｌＬａｂｏｒａｔｏｒｙｏｆＭｏｌｅｃｕｌａｒａｎｄＢｉｏｍｏｌｅｃｕｌａｒＥｌｅｃｔｒｏｎｉｃｓ）... 相似文献
9.
ＡＮｅｗＦａｓｔＡｌｇｏｒｉｔｈｍｆｏｒＣｏｍｐｕｔｉｎｇ２ＤＤｉｓｃｒｅｔｅＣｏｓｉｎｅＴｒａｎｓｆｏｒｍＷｕＨｏｎｇｗｅｎ（吴红文）（ＴｈｅｒｍａｌＥｎｅｒｇｙＥｎｇｉｎｅｅｒｉｎｇＲｅｓｅａｒｃｈＩｎｓｔｉｔｕｔｅ，ＳｏｕｔｈｅａｓｔＵｎｉｖ... 相似文献
10.
ＡＮＯＴＥＯＮＰＡＮＣＹＣＬＩＣＯＲＩＥＮＴＥＤＧＲＡＰＨＳｏｎｇＺｅｎｇｍｉｎ（宋增民）ＣｈｅｎＬｉｍｉｎｇ（陈黎明）（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｈｅｍａｔｉｃｓａｎｄＭｅｃｈａｎｉｃｓ）ＡＮＯＴＥＯＮＰＡＮＣＹＣＬＩＣＯＲＩＥＮＴＥＤＧＲＡＰ... 相似文献
11.
研究由横磁场(TM)激励含两个孔缝的无限平面导体的散射特性．孔缝另一端构成一微波网络．我们用基于格林函数的矩量法计算这一问题．用波导模函数展开未知函数，采用伽略金法和三角形基函数．给出了扩展的归一化网络参数．由一平面波激发，通过求解归一化网络参数和散射场的场强模式计算，给出几组不同参数情况下的散射圃图和数值结果．一些计算实例可以和“TE”情况进行比较．我们认为在导体内部微波网络和两孔缝是互相连通的． 相似文献
12.
付丽辉 《中国现代教育装备》2010,(13):60-62
利用一种改进的BP神经网络（PSO-BP）建立的教学成绩给定模型,在教学过程中所涉及的平时成绩给定的指标体系基础上,利用给定指标值作为输入,成绩估算值作为输出,通过PSO对BP神经网络的参数进行训练和学习,并利用Matlab软件建立实验平台。实验结果表明：新算法充分利用了神经计算的快速性以及粒子群算法的全局寻优能力,使得模型具有良好的辨识精度,可以较好地解决教学过程中平时成绩给定的动态问题。 相似文献
13.
Dynamic model and control strategy of parallel mechanism have always been a problem in robotics research. In this paper, different dynamics formulation methods are discussed first. A model of redundant driven parallel mechanism with a planar parallel manipulator is then constructed as an example. A nonlinear adaptive control method is introduced. Matrix pseudo-inversion is used to get a desired actuator torque from a desired end-effector coordinate while the feedback torque is directly calculated in the actuator space. This treatment avoids forward kinematics computation that is very difficult in a parallel mechanism. Experiments with PID together with the descibed adaptive control strategy were carried out for a planar parallel mechanism. The results show that the proposed adaptive controller outperforms conventional PID methods in tracking desired input at a high speed. 相似文献
14.
Dynamic distribution model is one of the best schemes for parallel volume rendering. However, in homogeneous cluster system, since the granularity is traditionally identical, all processors communicate almost simultaneously and computation load may lose balance. Due to problems above, a dynamic distribution model with prime granularity for parallel computing is presented. Granularities of each processor are relatively prime, and related theories are introduced, A high parallel performance can be achieved by minimizing network competition and using a load balancing strategy that ensures all processors finish almost simultaneously, Based on Master-Slave-Gleaner （ MSG） scheme, the parallel Splatting Algorithm for volume rendering is used to test the model on IBM Cluster 1350 system. The experimental results show that the model can bring a considerable improvement in performance, including computation efficiency, total execution time, speed, and load balancing. 相似文献
15.
动态报表是报表设计中的关键问题,针对VB中Data Report控件只能静态打印的问题,提出了报表的动态刷新和带参数报表打印的解决方法,同时给出了应用实例.实验证明该方法灵活、简便、实用性强. 相似文献
16.
Wang Deren Zhao Fengguang 《上海大学学报(英文版)》1998,2(1):15-21
ＡＣｌａｓｏｆＩｔｅｒａｔｉｏｎＭｅｔｈｏｄｆｏｒｔｈｅＢｅｓｔＡｐｐｒｏｘｉｍａｔｉｏｎＰｒｏｂｌｅｍｓＷａｎｇＤｅｒｅｎＺｈａｏＦｅｎｇｇｕａｎｇ（ＣｏｌｅｇｅｏｆＳｃｉｅｎｃｅｓ）ＡｂｓｔｒａｃｔＷｅｐｒｏｐｏｓｅａｃｌａｓｓｏｆｉｔｅｒａｔｉ... 相似文献
17.
孙济洲 《天津大学学报(英文版)》2002,8(3):178-182
对利用网络资源解决复杂且耗时的计算问题做了尝试 .选择典型的粒子跟踪整体光照计算问题作为研究对象 ,提出一种改进的且充分发掘其内在相关特性的密度估计算法 .在以太网连接的多台微机上 ,以PVM (并行虚拟机 )机制实现了该算法的并行计算 .通过对各项运算性能指标的测试与分析 ,结果显示可获得良好的加速比 ,并且PVM在分布式网络并行计算上将有很好的应用前景 相似文献
18.
本文讨论了一类Bottleneck问题,给出了判定最优解的三个定理,并在此基础上给出了一个求最优解的算法和算例,算法的复杂度为O(n2). 相似文献
19.
1 Introduction Large and complex engineering problems often needmuch computation ti me and storage to run on ordinaryuniprocessor computers . Even if they can be solved ,powerful computation capability is required to obtainaccurate and reliable results within reasonable ti me .Parallel computing can meet requirements of high per-formance computing[1].Various types of parallel hard-ware architectures have been developed and parallelalgorithms adapted to these hardware architecturesproposed[2 ,3… 相似文献
20.
1 Introduction Large and complex engineering problems often needmuch computation ti me and storage to run on ordinaryuniprocessor computers . Even if they can be solved ,powerful computation capability is required to obtainaccurate and reliable results within reasonable ti me .Parallel computing can meet requirements of high per-formance computing[1].Various types of parallel hard-ware architectures have been developed and parallelalgorithms adapted to these hardware architecturesproposed[2 ,3… 相似文献