用顶点链编码计算区域面积的方法

研究了在图像分析和识别中，直接从顶点链编码计算封闭边界所围区域面积的方法，并用该方法对正方形、正三边形和正六边形点阵中区域面积进行了计算．结果表明，顶点链编码计算封闭边界所围区域面积的方法简单易行，且运算速度快．     

非线性规划的元胞蚂蚁算法

将元胞自动机思想引入到蚂蚁算法中，提出一种新的进化算法——元胞蚂蚁算法。通过算法的元胞演化机制对信息素的二次分配，有效扩大了对解空间的搜索，避免陷入局部最优，并提高了寻找到所有全局最优解的能力。通过对一系列典型多极值优化问题的求解，均找到了所有全局最优解，显示了其在寻找多峰函数极值点方面的优越性。     

Planning a cost-effective cellular manufacturing process—a case study

The drive key is one of the most important high-precision components of aircraft braking systems. In this paper, a cost-effective drive key manufacturing process is developed. This proposed manufacturing process makes use of near net shape manufacturing, CNC machining, and cellular manufacturing methods. To make the proposed process a reality, proper engineering changes of the parts along with group technology are applied to the product design, in conjunction with the pro posed manufacturing methods. In addition, a general spread sheet program is developed for each style of fixture module to assist in part program coding. Moreover, statistical process control (SPC) is implemented to verify product quality and accept the product at the point of manufacture. It is observed that the implementation of the proposed drive key cellular manufacturing process results in a tremendous improvement in quality, throughput and productivity as well as a drastic reduction in manufacturing operations, workholding fixtures, cutting tools, and inspection media.     

日本式单元化生产——生产方式在日本的最新发展形态

日本式单元化生产是生产方式在日本的最新发展形态,是在电子等诸多行业被誉为超越精益的一种先进生产方式。我们通过这篇文章对日本式单元化生产做一简要介绍,一方面试图把它引入中国,为中国实现由制造大国向制造强国的转变和制造业的复兴提供一种可供参考的新型生产组织管理模式,另一方面以求引起中国研究者的关注,从而使更多的研究者加入这一生产方式的研究队伍。本文分六个部分,分别概述了日本式单元化生产的起源、产生背景、与传统的欧美式单元化生产的区别、本质特征、实施中的优劣势以及亟待研究的几个关键问题。     

基于元胞自动机的物流系统选址模型

元胞自动机是可模拟复杂结构和过程的模型.在分析现代物流发展特点的基础上,建立基于元胞自动机的物流系统选址模型.应用元胞自动机模拟技术及MATLAB,对物流系统的选址模型进行了仿真研究,并获得了合理和有益的结论,可为实际应用提供建模参考.     

连续交通流模型的建模与研究

在元胞自动机交通流FI模型的基础上，将离散决定性FI模型改进为连续的决定性FI模型，探讨了连续模型的流量及其不稳定行为．为了接近实际交通，在连续决定性FI模型的基础上研究了随机刹车对交通流的影响．研究发现，不管在决定性模型还是考虑随机刹车的模型，都能描绘实际交通流行为中的亚稳态行为．这从理论上解释了实际交通流中的亚稳态现象是由于车辆在一定密度区域分布不均匀的结果．     

TDOA/DOA数据联合无线蜂窝定位

针对传统的双曲线定位和圆周定位方法至少需要3个基站参与定位的问题,提出了一种在WCDMA上行链路中利用移动台信号到达基站的时间差和角度信息来实现对移动台定位的优化方法。该方法最少需要两个基站信息实现定位,降低了系统实现的复杂度,在相同数量基站信息下比单纯利用移动台信号到达基站的时间差方法精度高。最后给出了利用该实现方案和算法在WCDMA环境下的仿真结果和性能分析。     

The Evolution of Cooperative Strategies for Asymmetric Social Interactions

How can cooperation be achieved between self-interested individuals in commonly-occurring asymmetric interactions where agents have different positions? Should agents use the same strategies that are appropriate for symmetric social situations? We explore these questions through the asymmetric interaction captured in the indefinitely repeated investment game (IG). In every period of this game, the first player decides how much of an endowment he wants to invest, then this amount is tripled and passed to the second player, who finally decides how much of the tripled investment she wants to return to the first player. The results of three evolutionary studies demonstrate that the best-performing strategies for this asymmetric game differ from those for a similar but symmetric game, the indefinitely repeated Prisoner’s dilemma game. The strategies that enable cooperation for the asymmetric IG react more sensitively to exploitation, meaning that cooperation can more easily break down. Furthermore, once cooperation has stopped, it is much more difficult to reestablish than in symmetric situations. Based on these results, the presence of asymmetry in an interaction appears to be an important factor affecting adaptive behavior in these common social situations.     

Pattern Matching

An important subtask of the pattern discovery process is pattern matching, where the pattern sought is already known and we want to determine how often and where it occurs in a sequence. In this paper we review the most practical techniques to find patterns of different kinds. We show how regular expressions can be searched for with general techniques, and how simpler patterns can be dealt with more simply and efficiently. We consider exact as well as approximate pattern matching. Also we cover both sequential searching, where the sequence cannot be preprocessed, and indexed searching, where we have a data structure built over the sequence to speed up the search.     

元胞自动机变换可恢复图像认证算法

提出一种基于元胞自动机变换的可恢复图像认证算法,将图像分割成不重叠子块,对每个子块进行两层二维元胞自动机变换CAT,从第二层低频系数生成子块认证水印和恢复水印,分别嵌入当前子块和对应子块的第一层低频系数,形成含水印图像;用认证水印进行图像认证;用恢复水印恢复被篡改图像子块。实验表明,该算法安全性高,且具有很强的抗VQ攻击能力。