Analyzing the structure of a class of linear automata over a ring $$ Z_{p^k } $$

Basic finite-automaton characteristics are established for the class of all linear automata and information-lossless automata over a ring. The complexities of solving problems of parametric identification and initial-state identification are analyzed. The sets of fixed points for mappings realized by initial automata are characterized. Canonical forms are proposed for linear automata over the ring. __________ Translated from Kibernetika i Sistemnyi Analiz, No. 3, pp. 60–74, May–June 2008.     

Efficient Compositing Methods for the Sort-Last-Sparse Parallel Volume Rendering System on Distributed Memory Multicomputers

In the sort-last-sparse parallel volume rendering system on distributed memory multicomputers, one can achieve a very good performance improvement in the rendering phase by increasing the number of processors. This is because each processor can render images locally without communicating with other processors. However, in the compositing phase, a processor has to exchange local images with other processors. When the number of processors exceeds a threshold, the image compositing time becomes a bottleneck. In this paper, we propose three compositing methods to efficiently reduce the compositing time in parallel volume rendering. They are the binary-swap with bounding rectangle (BSBR) method, the binary-swap with run-length encoding and static load-balancing (BSLC) method, and the binary-swap with bounding rectangle and run-length encoding (BSBRC) method. The proposed methods were implemented on an SP2 parallel machine along with the binary-swap compositing method. The experimental results show that the BSBRC method has the best performance among these four methods.     

A Face Identification System Based on the Mahalanobis–Taguchi System

In this paper, we propose a face identification system based on the Mahalanobis–Taguchi System (MTS). The MTS is one of the pattern recognition methods frequently used in quality engineering, and can perform robust pattern recognition by using training data, including noise. It is likely that this advantage will allow the effective implementation of a robust face identification system against lighting and face position fluctuations. Moreover, the MTS can optimize the number of attributes required for identification by using the orthogonal array and the signal/noise (SN) ratio. The face identification system has to deal with many users and the amount of data in a facial image is large. Therefore, the time required for identification can be decreased and the amount of data in the facial image database can be reduced by performing the optimization. We confirmed the effectiveness of the proposed system through practical experiments. The experimental results revealed that the MTS was an effective method for robust face identification, and could effectively reduce the number of attributes required for identification.     

Closed loop identification and control loop reconfiguration: an industrial case study

The results of a joint university–industry collaborative project for control loop reconfiguration using closed loop experimental data from a fuel gas pressure control system are described in this paper. The fuel gas pressure was being regulated using a butane stream. For economic reasons, it was necessary to switch control to the ethane stream. Previous attempts at effecting this changeover had proved unsuccessful. In this study, a powerful system identification technique namely Canonical Variate Analysis (CVA) was employed to obtain the empirical plant models. A PI controller was then designed using the direct synthesis method. Acceptable closed loop behavior was obtained with little online tuning.     

一种基于指纹识别的网络通信安全平台

在网络通信中,由于密码体制的一些不安全性,使得信息在网络上传输的安全性受到威胁,提出了一种基于指纹识别的通信安全平台,在一定程度上可以提高通信的安全性。     

图象小波分解方式的改进及应用

在传统图象小波分解方式的基础上,提出一种改进的图象小波分解方法,并将它应用到图象压缩编码方案中去减少了运算杂度,实验结果也表明,该方案在不影响图象质量的前提下提高了压缩比,具有广阔的应用前景。     

六角网格上的图象处理算法的研究

经研究表明,屏幕上的点最佳分布是按六角网格形式分布的,文中首先讨论了六角网格的特点,屏幕用正六边形覆盖,即每个象素对应着一个正六边形,而将正六边形的中心点做为网格点;并从图形图象处理的角度分析了它的优点,如显示的直线（或曲线）没有“断开”的感觉,每个象素与所有相邻象素之间只有一种相邻关系,这就为许多图象处理提供了简便的实现途径,然后提出了在六角网格上进行图象处理的数字化过程以及在图象恢复时几何失真校正的算法,可以看出,在达到同样精度时计算量比方型网格上有明显减少。     

多CCD图象传感器在辐射成象系统中的应用

多CCD图象传感器辐射成象系统采用当前最先进的光电成象器件 ,高速、高分辨率图象采集卡和现代数字图象处理技术 ,可以直接得到弹道过程的四个时刻的四幅数字X射线图象。概述多CCD图象传感器辐射成象系统的组成和原理 ,详细论述多CCD图象传感器的应用技术。