Autonomous optimal coordination scheme in protection system of power distribution network by using multi-agent concept

A protection system using a multi-agent concept for power distribution networks is pro- posed. Every digital over current relay(OCR) is developed as an agent by adding its own intelli- gence, self-tuning and communication ability. The main advantage of the multi-agent concept is that a group of agents work together to achieve a global goal which is beyond the ability of each individual agent. In order to cope with frequent changes in the network operation condition and faults, an OCR agent, proposed in this paper, is able to detect a fault or a change in the network and find its optimal parameters for protection in an autonomous manner considering information of the whole network obtained by communication between other agents.Through this kind of coordi- nation and information exchanges, not only a local but also a global protective scheme is com- pleted. Simulations in a simple distribution network show the effectiveness of the proposed protec- tion system.     

Global Financial and Economic Impact on Science,Engineering and Technology Development and Engineering Education in the 21st Century

The science academies of the world are mounting a global initiative on the solutions to problems of sustainability transition in the 21st century. With population and environment as over-arching themes, they have identified food, energy, health, consumption, water and education and information as the six most important issues. The author argues that education should really be an over-arching theme, citing the experience and lessons from the Asian economic crisis and the social, economic and behavioural issues involved in achieving sustainable consumption in the developed world and sustainable development in the developing world. The efforts of science, engineering and technology (SET) in helping the world to a sustainable future must be underpinned by equity, morality and higher human values. The author appeals for a new SET unity and a return to engineering unity with a humane face, and urges engineering educators and practitioners to devote time to community service and involvement and to focus on lifelong continuous engineering education and continuous professional development leading to global reach and mobility of the professional engineers.     

高等教育质量保证趋势——香港的经验

近20年来,高等教育领域呈现出种种现实的矛盾与悖论。在复杂动荡的情景中,高等院校的教学功能得到了社会前所未有的重视。在过去近10年间,很多国家或地区在高等教育领域都建构了质量评估体系。本文主要分析香港高等教育质量保证过程,在分析其变革动因的同时亦反思在这一过程中可能存在的问题。     

Biclustering of ARMA time series

Biclustering is a method of grouping objects and attributes simultaneously in order to find multiple hidden patterns.When dealing with a long time series,there is a low possibility of finding meaningful clusters of whole time sequence.However,we may find more significant clusters containing partial time sequence by applying a biclustering method.This paper proposed a new biclustering algorithm for time series data following an autoregressive moving average （ARMA） model.We assumed the plaid model but modified the algorithm to incorporate the sequential nature of time series data.The maximum likelihood estimation （MLE） method was used to estimate coefficients of ARMA in each bicluster.We applied the proposed method to several synthetic data which were generated from different ARMA orders.Results from the experiments showed that the proposed method compares favorably with other biclustering methods for time series data.     

The Pedagogy of Counseling: A Critical Examination

This article examines current literature on the pedagogy of counseling. The authors offer a critique of current counselor education practices and suggest constructivist methods for educating reflective practitioners.     

Prediction of Instability Separation Modes and Its Application in Practical Dynamic Security Region

The dynamic securityregion(DSR) is definedas are-gionininjectionspacein whicha power systemwill betran-siently stable for a given fault[1].The DSRis usually de-noted asΩd(i,j,F) ,whereiandjdenote the networkstructures of pre-fault and post-fault ,respect…     

学前特殊儿童综合干预策略探讨

基于影响因素的复杂性、幼儿障碍的特殊性、治疗方法的局限性、治疗人员的专业性等方面的考虑,学前特殊儿童宜采取综合干预策略进行针对性的训练.综合干预策略主要包括场所中心综合干预策略、儿童中心综合十预策略、项目中心综合干预策略、多维中心综合干预策略等,其作用主要表现为:可以促进不同专业人员之间集思广益,可以提升单一干预的效果,可以促进特殊婴幼儿某一方面或多方面能力的发展.     

Counselor Personality Needs as a Determinant of Functional Specialty Preference

The objective of this study was to determine whether personality needs discriminate between counselor trainees who prefer the administrator specialty and those who prefer the practitioner functional specialty. Doctoral students in counselor education at 20 southern universities were asked to complete a three-item questionnaire designed to determine functional specialty preference. Sixty-two subjects who indicated a preference for the administrator functional specialty and 63 subjects who chose the practitioner functional specialty completed the Personality Research Form (PRF). Stepwise discriminant analysis was used to determine the efficacy of PRF variables in discriminating between the administrator and practitioner groups. The results suggest that the PRF may have value as a tool in the selection of counselors.     

选课制与人才培养

选课制体现了学生学习的自由,这种自由是培养学生个性、选择能力和兴趣的前提,而这些个人品质正是创新的基础。高校作为人才培养的摇篮,为创新人才的成长,应加大开设选修课的力度。     

我国农村养老设施建设现状及改善对策——基于农村闲置公共设施再利用研究

我国社会老龄化具有人口基数大,老龄化速度快,未富先老,养老设施不足等特点。解读目前农村养老设施的现状,提出了大规模利用农村闲置学校和闲置村、乡镇办公设施改造为养老设施的对策。