以存储器为中心的路由器MRouter

并行系统的互连技术一直是高性能计算机的一个关键研究领域。在本文作者1999年中提出了一种基于多端口快速存储器的新型互连体系结构MCIM,并在此基础上构造出规模为16－128个CPU的结点系统。该文将MCIM原理应用在互连网络通信技术上,实现了一种以存储器系统为中心 的路由器MRouter。它采用流水操作和穿通传输技术,可用于构成低延时、高带宽的高性能互连网络。这将种互连网络与上述结点系统结合,可以实现更大规模的并行系统。而且其无论在板级或是结点级都采用同一种互连技术,有利于系统的模块化实现。文中介绍了以存储器为中心的互连机制MCIM的原理,同时描述了以存储器为中心的路由器MRouter的结构及数据传输流程,在仿真实验中作者对MCIM的互连通信技术和其它互连技术进行了测试和比较。     

A new DSATUR-based algorithm for exact vertex coloring

This paper describes a new exact algorithm PASS for the vertex coloring problem based on the well known DSATUR algorithm. At each step DSATUR maximizes saturation degree to select a new candidate vertex to color, breaking ties by maximum degree w.r.t. uncolored vertices. Later Sewell introduced a new tiebreaking strategy, which evaluated available colors for each vertex explicitly. PASS differs from Sewell in that it restricts its application to a particular set of vertices. Overall performance is improved when the new strategy is applied selectively instead of at every step. The paper also reports systematic experiments over 1500 random graphs and a subset of the DIMACS color benchmark.     

Joint segmentation of collectively moving objects using a bag-of-words model and level set evolution

In scenes with collectively moving objects, to disregard the individual objects and take the entire group into consideration for motion characterization is a promising approach with wide application prospects. In contrast to studies on the segmentation of independently moving objects, our purpose is to construct a segmentation of these objects to characterize their motions at a macroscopic level. In general, the collectively moving objects in a group have very similar motion behavior with their neighbors and appear as a kind of global collective motion. This paper presents a joint segmentation approach for these collectively moving objects. In our model, we extract these macroscopic movement patterns based on optical flow field sequences. Specifically, a group of collectively moving objects correspond to a region where the optical flow field has high magnitude and high local direction coherence. As a result, our problem can be addressed by identifying these coherent optical flow field regions. The segmentation is performed through the minimization of a variational energy functional derived from the Bayes classification rule. Specifically, we use a bag-of-words model to generate a codebook as a collection of prototypical optical flow patterns, and the class-conditional probability density functions for different regions are determined based on these patterns. Finally, the minimization of our proposed energy functional results in the gradient descent evolution of segmentation boundaries which are implicitly represented through level sets. The application of our proposed approach is to segment and track multiple groups of collectively moving objects in a large variety of real-world scenes.     

基于机群系统的大规模并行搜索算法--大型离散偏微分方程组快速求解

大量的科学与工程应用中,会经常遇到复杂偏微分方程组的求解问题,这些偏微分方程组一般无法得到分析解,实际采用的是将其离散后通过数值逼近方法来求得近似解.为了得到较高的求解精度,需要将离散网格划分得足够细,但是这样就成倍地增加了计算量,许多问题就是因为计算量过大而无法求解或不得不降低精度求解.本文在机群计算平台上,针对机群计算的特点,提出了一种大规模并行搜索算法,这种算法由于可以充分发挥各个结点的计算能力,有效降低结点之间的通信,因而具有很高的效率.文中对这一算法进行了详细描述.该算法已经成功地用于压力铸造过程的流场模拟计算之中,可以有效地解决一大类大型离散偏微分方程组的求解问题.对于同样规模的一个实际问题,并行算法的求解时间相对于串行算法,从3到4天下降到3个小时,取得了很好的并行加速.     

一种改进的正则图象

把正则图象的误差分成两部分：一部分为逼近误差，它是和原图象相关的确定型误差，另一部分为噪声传递误差，它是和噪声相关的随机型误差．通过正则图象代替原图象，求得逼近误差的近似值，然后将逼近误差近似值补给正则解，得到改进型正则解．对正则解以及逼近误差的计算，提出了快速算法，并有严密的理论推导．实验结果表明改进型正则图象的恢复效果优于传统正则解．在一敷的正则化方法中，可以借鉴本文提到的方法改进正则解．     

多层轻钢结构住宅体系设计

针对多层轻钢结构住宅的结构体系 ,提出了结构体系的建立方法、分析了主要构件及节点设计原理和基本的技术要求。研究了轻钢结构住宅体系的设计以及推广意义     

重载轻型桁架斜拉式组合挂篮的研究

主要介绍了重载轻型桁架斜拉式组合挂篮的结构形式、特点，分析了其计算模型，并通过工程算例的验证，表明了该种挂篮结构合理、构思独特．与其它结构形式的挂篮相比，它受力较为均匀、节省材料、减轻自重，是一种较为理想的新型挂篮结构，有实际应用价值．     

Energy-based robust controller design for flexible spacecraft

This paper presents a class of non-model2based position controllers for a kind of flexible spacecraft. With the controllers, one can achieve not only the closed-loop stability of the original distributed parameter system, but also the asymptotic stability of the truncated system, which is obtained through representing the deflection of the appendage by an arbitrary finite number of flexible modes. The system dynamics are not explicitly involved in the controller design and stability proof. Instead, only a very basic system energy rehtionship of the flexible spacecraft is utilized. The controllers possess several remarkable advantages over the traditional model-based ones. Numerical simulations are carried out on a kind of spacecraft with one flexible appendage and satisfactory results are obtained.     

棒材生产在线视觉计数系统研究

针对轧钢厂棒材生产工艺状况，为实现标准化打捆包装要求，设计了在线计数控制装置，研究了实时视觉图像处理，在线棒材识别算法和k级容错计数技术，并应用于含有各种干扰的实际生产过程，实现了棒材在线快速计数和分钢自动化操作．     

设备管理及监控的应用案例分析

以大型半导体制造企业为应用背景,应用在线设备监测系统TFM,对生产中心的生产设备运作信息进行实时集成和同步反馈,实现设备运行状态数据的显示、设备维护计划的查询和决策、设备生产效率的比较分析。把反映生产设备运行状态的动态数据提炼为形象直观的分析图形,实现可视化信息管理,提高生产中心现场设备管理水平。