OPTIMIZATION DESIGN OF HYDRAULIC MANIFOLD BLOCKS BASED ON HUMAN-COMPUTER COOPERATIVE GENETIC ALGORITHM

Optimization design of hydraulic manifold blocks (HMB) is studied as a complex solid spatial layout problem. Based on comprehensive research into structure features and design rules of HMB, an optimal mathematical model for this problem is presented. Using human-computer cooperative genetic algorithm (GA) and its hybrid optimization strategies, integrated layout and connection design schemes of HMB can be automatically optimized. An example is given to testify it.     

螺栓疲劳强度计算的再分析

在变应力理论的基础上，探讨了螺栓疲劳强度的计算方法，并分析了各种计算方法的特点，从而优选出了一种最佳计算方法。     

Theoretical mean-variance relationship of IP network traffic based on ON/OFF model

Mean-variance relationship (MVR), nowadays agreed in power law form, is an important function. It is currently used by traffic matrix estimation as a basic statistical assumption. Because all the existing papers obtain MVR only through empirical ways, they cannot provide theoretical support to power law MVR or the definition of its power exponent. Furthermore, because of the lack of theoretical model, all traffic matrix estimation methods based on MVR have not been theoretically supported yet. By observing both our laboratory and campus network for more than one year, we find that such an empirical MVR is not sufficient to describe actual network traffic. In this paper, we derive a theoretical MVR from ON/OFF model. Then we prove that current empirical power law MVR is generally reasonable by the fact that it is an approximate form of theoretical MVR under specific precondition, which can theoretically support those traffic matrix estimation algorithms of using MVR. Through verifying our MVR by actual observation and public DECPKT traces, we verify that our theoretical MVR is valid and more capable of describing actual network traffic than power lawMVR. Supported by the National Basic Research Program of China (Grant No. G2005CB321901)     

A simple amplify-and-forward opportunistic relaying based on outdated channel state information

Opportunistic relay selection(ORS)is a promising approach for cooperative communications owing to its low complexity by activating only the best relay.However,in mobile scenarios,the channel state information(CSI)estimated in relay selection may be different from the actual CSI employed in data transmission due to relatively fast varying channels,i.e.,CSI is outdated,which may lead to incorrect relay selection,and hence system performance deteriorates.To address the problem,this paper designs a relay selection strategy with instaneous and statistical CSIs in amplify-and-forward(AF)cooperative networks whose instantaneous CSIs of two hops employed in relay selection are both outdated.Based on high signal-to-noise ratio(SNR)analysis,we propose a distinctive relay selection strategy which can be described as selecting the relay with the asymptotic optimum average symbol error probability(SEP)and outage probability at high SNR.The corresponding asymptotic outage probability and SEP performance analysis are also provided.Finally,simulation results not only validate our theoretical analysis,but also show that in asymmetrical outdated CSI scenarios,the proposed strategy achieves better performance than existing relay selection strategies at medium and high SNR values.     

Application of the Multi-Electrode in the Degradation of Alizarin Red Induced by Glow Discharge Plasma

This paper presents a novel set-up to be used in the degradation of dye, Various influencing factors, such as the voltage, the number of the anodes, and the catalytic action of Fe^2＋, were examined. Chemical oxygen demand （COD）, ultraviolet （UV）, FTIR absorption spectra, and atomic force microscopy （AFM） were used to monitor the degradation process. The results showed that the efficiency of degradation is raised by increasing the applied voltage, and is further improved when two or three anodes are used. Moreover, the use of Fe^2＋ ion can promote the degradation reaction and shorten the degradation time. So the multi-electrode instrument is more efficient in degrading the dye and should be further studied.     

城市勘测电子档案管理方法新探

在承担国家档案局立项的科研项目"城市勘测电子档案管理方法研究"时,针对城市勘测行业特点、需要和技术的发展,有针对性地开展档案的分类方案修订、规范和标准体系制定、元数据管理等的理论探索;并结合实际从勘测电子档案的生成直至销毁的各个环节进行系统集成和信息建库,实现勘测电子档案高效安全管理、网络化利用.     

基于MapX的矿山生产矿量管理系统

针对矿山生产矿量管理中存在的问题,利用地理信息系统(GIS)技术给出合理解决这些问题的方案。并且在此基础上利用地理信息系统软件Mapinfo的控件MapX为图形平台,在VB6.0可视化环境下编程,将这一方案用软件的形式加以实现。     

基于MapX的矿山生产矿量管理系统

针对矿山生产矿量管理中存在的问题，利用地理信息系统技术（GIS）给出合理解决这些问题的方案。并且，在地理信息系统软件MapX的基础上进行开发，将这一方案用软件的形式加以实现。     

SWARM INTELLIGENCE BASED DYNAMIC REAL-TIME SCHEDULING APPROACH FOR SEMICONDUCTOR WAFER FAB

Based on the analysis of collective activities of ant colonies, the typical example of swarm intelligence, a new approach to construct swarm intelligence based multi-agent-system (SMAS) for dynamic real-time scheduling for semiconductor wafer fab is proposed. The relevant algorithm, pheromone-based dynamic real-time scheduling algorithm (PBDR), is given. MIMAC test bed data set mini-fab is used to compare PBDR with FIFO (first in first out), SRPT(shortest remaining processing time) and CR(critical ratio) under three different release rules, i.e. deterministic rule, Poisson rule and CONWIP (constant WIP). It is shown that PBDR is prior to FIFO, SRPT and CR with better performance of cycle time, throughput, and on-time delivery, especially for on-time delivery performance.     

电泵转抽及深抽配套工艺在油田控水降耗中的应用

进入高含水开发后期,由于大量使用电泵提液,濮城油田产液量呈逐年大幅度递增趋势,加重了地面管网、污水处理等系统的负担,造成层间产出更加不均匀,含水上升幅度过大,为实现控水稳油的目标,寻找一种适合濮城油田现阶段的采油工艺技术,我们开展了电泵井转抽及其配套工艺技术研究,通过在22口井上实施,取得了节电增油降水的效果。