A model to support the search for consensus with conflicting rankings: Multitrident

A general problem of collective decision‐making can be formulated in terms of the N rankings of a discrete set of alternatives expressing the preferences of the N members of the group. Helping to reach a consensus is quite important for team building and organizational development and several contributions were developed by different disciplines like organizational sciences, human resources management and operational research. However, very few models were proposed to support the process of reaching consensus and such models assume a concept of distance between rankings implying an assumption of equal distance between adjacent alternatives. Unfortunately, this hypothesis is hardly acceptable in most cases. In this paper, a model is proposed to search for a ranking in terms of the weights space avoiding the previous assumption and providing useful insights to help decision‐makers adopting such ranking as a consensus decision.     

电磁泄放阀辅阀改进

通过对电磁泄放阀辅阀泄漏原因的分析，提出了相应的改进措施：(1)改进辅助阀瓣结构；(2)改动辅阀位置；(3)改变试验方法；(4)加强锅炉起动时的检查。珠江电厂3号、4号炉电磁泄放阀采取这些措施后已运行近两年，效果良好，辅阀未再泄漏，确保了机组的安全运行。     

Review of Evolution, culture and the human mind.

Reviews the book, Evolution, culture and the human mind edited by M. Schaller, et al. (see record 2009-20004-000). This current volume, Evolution, culture and the human mind, follows the lead of Wundt where an attempt is made to provide a synthesis of theory and data across psychological subfields into a holistic framework. Norenzayan, Schaller, and Heine begin the volume with an overview of the scope and themes that arose from their 2004 conference at the University of British Columbia on “Mind, Culture and Evolution.” Explicit throughout this volume is an effort to bridge the “yawning chasm” between perspectives of evolutionary determinism and cultural constructionism. In doing so, there is interest in providing a rigorous multidisciplinary scientific effort to solve this foundational problem for psychology. As such this volume provides an interesting and insightful examination of the evolution of consciousness, cognition, decision-making, actions, and cultural norms in terms of collective consequences and genetic mechanisms. The volume is divided into three sections where several dialectical themes (theory/data, top-down/bottom-up, ecological/social, diversification/integration) are woven throughout. Overall the volume offers nice flow from one collection of essays to the next as themes are picked up and let go, only to return later on. This volume shows a dominance of natural science (cross-cultural) inclinations where some readers may call for more voice given to phenomenological and hermeneutical (cultural) human science contributions. Other critics may challenge the reliance upon correlational, comparative, and post hoc data to bolster claims of causality in support of various theoretical suppositions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

变频调速技术在局部通风机中的应用

变频调速技术,正是顺应了工业生产自动化发展的要求,一改普通电动机只能以额定的转速运行的固定模式,使得电动机及其负载在无须任何改动的情况下即可以按照我矿生产要求调整功率输出,从而降低电机功耗以达到设备高效运行的目的。     

不确定关联大系统的分散变结构控制

针对不确定关联大系统,提出了一种变结构渐近稳定控制律.利用左特征向量设计了关联大系统的切换面,在理想切换面附近利用一个辅助函数,建立一个柔化带来柔化控制律.利用Lyapunov稳定性理论和对角占优性质,严格证明了所设计的不确定关联大系统的变结构控制系统的全局渐近稳定性.这种变结构控制律不仅提高了系统进入滑动模态的快速性,而且消除切换面附近的抖振.仿真算例验证了该方法的有效性.     

交流电弧炉智能集成计算机控制系统

系统以工控机为中心,配以高性能的模块化外设组成一体化的计算机控制系统。采用温度控制外环和电流平衡控制内环的双环路结构来具体实现交流电弧炉温度和三相电流平衡的智能集成控制。外环采用模糊、神经网络和优化决策共同控制,内环则采用模糊专家解耦控制。系统能实时自适应炉况状态的变化,提高生产效率,降低电能及电极消耗。实际运行证明该系统具有良好的鲁棒性和实时性。     

发电厂厂用电电气综合自动化技术发展综述

总结了厂用电系统的监控范围和特点,对厂用电电气综合自动化技术的发展历程做出回顾,分析比较了目前系统组态模式的结构及其特点,提出了分层分布式模式的关键技术,并进一步探讨了技术的发展趋势.     

基于风险加权的同构化区间型多属性决策新算法

多属性决策问题的复杂性、决策因素影响的不确定和传统评判方法的局限性,使不确定决策因素的属性测度常常难以精确量化,往往只能用区间数进行大致估量.为了精确量化表征属性决策因素测度值不确定性,根据同构化基本原理与相似性科学相关理论及相关思想,针对区间型多属性决策问题提出了一种基于同构化多属性决策新方法的新算法.该新算法的主要特点是:1)提出了决策者风险偏好权重;2)采用了同构化风险测度三元组(拟下限相似度,风险程度,风险偏好值),来精确量化决策过程中存在的风险程度以及决策者对此风险程度的偏好;3)生成了可描述各属性与决策目标关系的标杆方案;4)定义了方案相似度新概念;5)构造了风险加权相似度量算子(RWSM0),来度量各决策方案与标杆方案之间风险加权相似度的大小;6)挑选出风险加权相似度最大的方案作为最优或满意方案.     

输出信号量化的双率采样系统参数辨识方法

针对双率采样和信号量化(signal quantization)[BFQB]的控制系统,采用随机重复性试验测量信息,提出基于辅助模型的双率采样量化控制系统辨识方法.分析了在随机重复试验和放松估计误差方差条件下,双率采样量化系统的模型特征并给出了分两步辨识的策略,推导了进行参数辨识所满足的持续激励条件,并给出了基于辅助模型的双率采样量化控制系统量化辨识递推算法;接着分析了所给出量化辨识递推算法的收敛性,得到了双率采样量化系统参数估计误差上界的计算式,最后数字仿真验证了该算法及结论的有效性.     

考虑市场力风险约束的最优AGC控制模型

针对传统自动发电控制(AGC)优化模型中难以考虑市场力风险的问题,引入度量市场风险的价值模型,提出了以风险价值为限值的辅助服务成本约束混合整数非线性规划的AGC优化模型。为处理模型的非线性,引入两态辅助变量,将三态的机组状态变量进行等效转化,实现了模型的线性化,有效地降低了模型求解难度。以广西电网运行数据为例,对比不同风险置信水平下AGC控制性能,结果表明:置信水平越高,调节成本越大,控制效果越好,但无论置信水平高低,所提模型均能确保控制性能标准(CPS)合格,验证了模型的有效性,为电力市场环境下的AGC控制提供了有益参考。