基于自动调焦的微机控制显微硬度计

传统显微硬度计自动化程序不高,难以满足现代信息处理与分析要求,本文提出的基于自动调焦的微机控制技术应用传统显微硬度计中,能对各种金相试样进行自动测试,实践中取得了很好的效果。     

一个基于多主体的仿真工具系统--COMPLEXITY

本文首先论述复杂性科学中的基于多主体的系统仿真技术的意义、研究状况以及仿真系统必须具备的基本功能,并在这个基础上给出了我们自行开发的COMPLEXITY系统的设计与实现的方案.并将我们的工作与相关的工作SFI的SWARM与MIT的STARLOGO进行比较,最后指出我们下一步的工作方向.     

分布式仿真中实时网络通讯技术研究

该文分析了提高对网络通讯实时性五项技术措施。利用软件编程技术实现仿真计算机之间的时钟同步,并建立多任务多进程并发通讯机制以及介于ＴＣＰ／ＩＰ和ＵＤＰ／ＩＰ之间的中间传输协议支持技术,从而保证网络仿真环境的畅通无阻和交互信息的实时传输。     

单电子器件的仿真

该文介绍了一种利用正统理论与Ｍｏｎｔｅ Ｃａｒｌｏ方法模拟单电子隧空器件的认真程序。该程序可模拟电子通过包含小隧道结、电容和理想电压源的电路的输运过程,利用该程序,对单库仓岛和多库仓同的单电子晶体管（ＳＥＴ）系统进行了模拟。     

化学传感器阵列的计算机数据分析方法和发展趋势

化学传感器阵列是由一系列具有非特异性、低选择性、交叉敏感性和稳定性的化学传感器组成的分析仪器.作为利用化学传感器阵列进行准确可靠的定性和定量分析所不可或缺的条件,合适的模式识别和多元校正等数据处理方法已经成为化学传感器阵列的有机组成部分.该文着重介绍了常用的化学传感器阵列数据的计算机处理方法,并且展望了该领域的发展趋势.     

纳米金-壳聚糖-血红蛋白/普鲁士蓝/金电极检测过氧化氢

在普鲁士蓝修饰的金电极上,通过纳米金/壳聚糖复合膜固定血红蛋白,研制了安培型过氧化氢生物传感器,线性范围和检测限分别为1～5 000 umol/L和0.27umol/L.     

基于Linux的通用视频音频采集系统的设计与实现

该文阐述了在Linux下,利用V4L以及ALSA,在普通PC上组建视频音频采集系统以及远程传输的方法。     

提高RS485总线主从通信效率的软件设计

随着数字技术的发展和网络技术日益广泛的应用,经常需要采用串行通信来进行信息交换,RS485因硬件设计简单、控制方便、成本低廉等优点,广泛应用于工厂自动化、工业控制、银行商场小区监控等领域。但是RS485总线仍然只是一种常规的通信总线,不能够做总线的自动仲裁,即为了避免总线竞争不能同时发送数据,所以整个系统的通信效率较低,数据的冗余量较大。因此,提高现有系统的通信效率就显得尤为重要。     

On Siphon Computation for Deadlock Control in a Class of Petri Nets

As a structural object, siphons are well recognized in the analysis and control of deadlocks in resource allocation systems modeled with Petri nets. Many deadlock prevention policies characterize the deadlock behavior of the systems in terms of siphons and utilize this characterization to avoid deadlocks. This paper develops a novel methodology to find interesting siphons for deadlock control purposes in a class of Petri nets, i.e., a system of simple sequential processes with resources . Resource circuits in an are first detected, from which, in general, a small portion of emptiable minimal siphons can be derived. The remaining emptiable ones can be found by their composition. A polynomial-time algorithm for finding the set of elementary siphons is proposed, which avoids complete siphon enumeration. It is shown that a dependent siphon can always be controlled by properly supervising its elementary siphons. A computationally efficient deadlock control policy is accordingly developed. Experimental study shows the efficiency of the proposed siphon computation approach.     

Batch Nearest Neighbor Search for Video Retrieval

To retrieve similar videos to a query clip from a large database, each video is often represented by a sequence of high- dimensional feature vectors. Typically, given a query video containing m feature vectors, an independent nearest neighbor (NN) search for each feature vector is often first performed. After completing all the NN searches, an overall similarity is then computed, i.e., a single content-based video retrieval usually involves m individual NN searches. Since normally nearby feature vectors in a video are similar, a large number of expensive random disk accesses are expected to repeatedly occur, which crucially affects the overall query performance. Batch nearest neighbor (BNN) search is stated as a batch operation that performs a number of individual NN searches. This paper presents a novel approach towards efficient high-dimensional BNN search called dynamic query ordering (DQO) for advanced optimizations of both I/O and CPU costs. Observing the overlapped candidates (or search space) of a pervious query may help to further reduce the candidate sets of subsequent queries, DQO aims at progressively finding a query order such that the common candidates among queries are fully utilized to maximally reduce the total number of candidates. Modelling the candidate set relationship of queries by a candidate overlapping graph (COG), DQO iteratively selects the next query to be executed based on its estimated pruning power to the rest of queries with the dynamically updated COG. Extensive experiments are conducted on real video datasets and show the significance of our BNN query processing strategy.