基于ARM的视频监控系统的设计与实现

随着计算机技术和图像处理技术的发展，数字视频监控系统得到了广泛应用。随着嵌入式技术和网络技术的发展，出现了基于嵌入式和Intemet的视频监控系统。介绍了基于ARM微处理器的嵌入式网络视频监控系统的组成，着重阐述了监控系统的原理、设计方案，硬件模块和软件模块的实现方法。     

医学信息管理专业《数据结构》课程教学改革的探索与实践

文章针对新疆医科大学医学信息管理专业《数据结构》课程教学实际中存在的问题,结合学生和课程的特点进行分析,经过教学组多名教师近几年的共同努力,对该课程的教学内容、教学方法与手段、实践环节提出了一些教学改革尝试,并应用于课程教学中,取得了显著的效果.     

YYJ-50型板簧预压机的液压系统

介绍了YYJ-50型钢板弹簧预压机的功能,及其液压系统的改造。     

Further Studies on the Formation of Nitrosamines in Cured Pork Products Packaged in Elastic Rubber Nettings

Traces of N-nitrosodi-n-butylamine (NDBA) and N-nitrosodiethylamine (NDEA) can form in cured pork products packaged in elastic rubber nettings due to the interaction of nitrite in meat and amines in the rubber. Studies were carried out to determine whether taking nettings off immediately after processing or placing a layer of collagen as a barrier between nettings and meat could prevent or minimize formation of the above nitrosamines. None was effective. However, cured pork products packaged in a reformulated rubber netting, made with different amine additives, contained either none or only negligible levels of NDBA or NDEA, but, instead, contained 8–104 ppb levels of a new nitrosamine, N-nitrosodibenzylamine which is reported to be noncarcinogenic.     

Individual learning of coordination knowledge

Abstract. Social agents, both human and computational, inhabiting a world containing multiple active agents, need to coordinate their activities. This is because agents share resources, and without proper coordination or ‘rules of the road’, everybody will be interfering with the plans of others. As such, we need coordination schemes that allow agents to effectively achieve local goals without adversely affecting the problem-solving capabilities of other agents. Researchers in the field of Distributed Artificial Intelligence (DAI) have developed a variety of coordination schemes under different assumptions about agent capabilities and relationships. Whereas some of these researchers have been motivated by human cognitive biases, others have approached it as an engineering problem of designing the most effective coordination architecture or protocol. We evaluate individual and concurrent learning by multiple, autonomous agents as a means for acquiring coordination knowledge. We show that a uniform reinforcement learning algorithm suffices as a coordination mechanism in both cooperative and adversarial situations. Using a number of multi-agent learning scenarios with both tight and loose coupling between agents and with immediate as well as delayed feedback, we demonstrate that agents can consistently develop effective policies to coordinate their actions without explicit information sharing. We demonstrate the viabilityof using both the Q-learning algorithm and genetic algorithm based classifier systems with different pay-off schemes, namely the bucket brigade algorithm (BBA) and the profit sharing plan (PSP), for developing agent coordination on two different multi-agent domains. In addition, we show that a semi-random scheme for action selection is preferable to the more traditional fitness proportionate selection scheme used in classifier systems.     

Minimal realization of arbitrary switching functions with 2-level networks of isodistinct and isobaric threshold gates

This paper deals with the synthesis of 2-level networks of threshold logic elements for realizing non-linearly separable switching functions. Gate minimality has been ensured for the types of gates used. The method is straightforward and can be programmed in a computer.     

Some new results on a class of periodically varying systems

The analysis and stability properties of a special class of R-L-C network, where the energy storage elements vary periodically with time and the dissipative elements are held constant, is discussed. In the analysis, fast Fourier transform technique has been utilized to obtain rapidly an accurate response of the network when excited by any arbitrary periodic signal. In the stability results, it has been shown that the network's stability can be ensured in a very simple manner if the connection matrix of the network is in Jordan normal form.     

Steady-state Analysis of a Self-saturating Magnetic Amplifier†

In this paper a simple measurement of dynamic B-H characteristics of grain-oriented silicon has been made by peak voltmeter under a biased condition pertinent to a self-saturating condition. A method of steady-state analysis of a self-saturating magnetic amplifier of grain-oriented silicon steel has been described from the non-linear characteristics obtained from the measurement. No approximation has been made. The transfer characteristies of a half wave as well as a full wave amplifier have been calculated and verified from the data of actual measurements. The results shown are quite encouraging.     

A NOVEL QUICK-CLOSING PROBE FOR MEASURING LOCAL PARTICULATE PHASE DENSITY IN GAS-PARTICLE SUSPENSIONS

ABSTRACT

An innovative quick-closing probe system was designed, built, and tested for measuring the local particulate phase density of gas-particle suspensions. Experiments with glass beads and powder coals were conducted in a horizontal channel with an aspect ratio of 11 to 1, and also in a 0·25 m I.D. bench-scale vortex chamber. Results of particle density distributions in these two systems indicated the ability of the probe to perform in highly turbulent, swirling, dilute and intermediate phase gas-particle suspension flows. The probe was connected with a microcomputer-assisted particle weighing system for data collection and reduction. Comparison of measured data by this probe with calculated results was assessed. Since this probe requires no calibration curve nor empirical equation, it serves as a primary standard for particle density measurements. The design features, working principle, component characteristics, overall performance, and test results are discussed in this paper.     

On the derivation and analysis of a non-linear model for describing a class of adaptive sampling laws

This paper deals with the non-linear oscillations arising from the use of a class of adaptive sampling laws. A method is proposed which diminishes the drawbacks related to the appearance of such oscillations.