Herd behavior and the quality of opinions

This paper analyzes a decentralized decision model by adding some inertia in the social leaning process. Before making a decision, an agent can observe the group opinion in a society. Social learning can result in a variety of equilibrium behavioral patterns. For insufficient ranges of quality (precision) of opinions, the chosen stationary state is unique and globally accessible, in which all agents adopt the superior action. Sufficient quality of opinions gives rise to multiple stationary states. One of them will be characterized by inefficient herding. The confidence in the majority opinion then has serious welfare consequences.     

汉代《易》的承传与《易》学的演化--《两汉群经流传概说》之一

先秦<易>学已有了相当的发展.汉初传<易>者继起,<易>学开始成为显通学派.昭、宣以迄西汉之末,今文<易>前后承传大畅其势,以孟、焦、京为代表,形成新的<易>学体系.东汉<易>学的演化表现在今文<易>学与谶纬的合流,以及古文<易>学的由微而显.汉代官学地位的确立大大推动了<易>学空前广泛的流传,而象数说的突出发展构成汉<易>主要特色.     

论企业统计队伍的继续教育

加强企业统计人才队伍的继续教育,是企业统计改革与发展的关键。本文通过对企业统计人员的现状剖析,根据企业对统计人才的需求,提出了企业统计人才队伍继续教育的具体思路与方法。     

化学新课程改革与微型化学实验

新一轮基础教育改革中，化学新课程改革在理念和内容上都强调学习方式的转变，即倡导探究性学习．探究性学习的实质，是学生主动参与教学过程，积极从事各种探究活动，亲自发现科学概念和原理，掌握探究技能．事实表明微型化学实验是实现探究性学习的有效手段．     

大学生英语学习心理问题探析

心理因素对学生的学习及生活起着举足轻重的作用。大学英语教师不仅应该从自身出发 ,提高业务水平 ,还应该考虑到学生的各种学习心理 ,及时有效地加以引导 ,使其有利于大学英语教学和学生的身心健康。     

《上博馆藏楚竹书&#183;诗论》在《诗》学批评史上意义三题

上博<诗论>的发现,对整个先秦<诗>学批评的产生具有重大意义一、在从孔门<诗>教到<毛诗序>的流传过程中,上博<诗论>具有承上启下的作用;二、上博<诗论>对后世<诗>评具有指导性;三、上博<诗论>在文学批评史上有着深远意义.     

理工农医类大学设立人文社科类课程的重要意义

针对理工农医类大学在学生素质教育和创新能力培养中亟需解决的问题 ,分析论述了加强对学生人文社会科学教育的重要意义 ,提出了通过两课教学和设置辅修专业等措施来实现对学生加强人文社会科学教育的目的。     

论红学的边界性

《红楼梦》自诞生以来，被当成各种属性的文本，它在不同的学科领域被接受，而对于任何一个学科来说，《红楼梦》的阅读现象都呈现出一种边界性。这根源于文本《红楼梦》的边界性，它本身具有小说学、经学、朴学的因素。这种边界性正是红学的生机之所在。边界性不等于混乱与无充，从方法论看，红学具有两个世界；事实还原的世界和意义诠释的世界。     

论曾纪泽的外交思想及实践

曾纪泽是我国近代著名的爱国外交家。中西文化是曾纪泽外交思想的源泉。他是传统外交向近代外交转化的代表人物之一 ,他的外交思想反映了当时中国外交发展的方向。中俄谈判和中法交涉无疑体现了他的外交思想。他既不同于主和派 ,又不同于主战派。     

Potential exposures and risks from beryllium-containing products.

Beryllium is the strongest of the lightweight metals. Used primarily in military applications prior to the end of the Cold War, beryllium is finding new applications in many commercial products, including computers, telecommunication equipment, and consumer and automotive electronics. The use of beryllium in nondefense consumer applications is of concern because beryllium is toxic. Inhalation of beryllium dust or vapor causes a chronic lung disease in some individuals at concentrations as low as 0.01 microg/m3 in air. As beryllium enters wider commerce, it is prudent to ask what risks this might present to the general public and to workers downstream of the beryllium materials industry. We address this question by evaluating the potential for beryllium exposure from the manufacturing, use, recycle, and disposal of beryllium-containing products. Combining a market study with a qualitative exposure analysis, we determine which beryllium applications and life cycle phases have the largest exposure potential. Our analysis suggests that use and maintenance of the most common types of beryllium-containing products do not result in any obvious exposures of concern, and that maintenance activities result in greater exposures than product use. Product disposal has potential to present significant individual risks, but uncertainties concerning current and future routes of product disposal make it difficult to be definitive. Overall, additional exposure and dose-response data are needed to evaluate both the health significance of many exposure scenarios, and the adequacy of existing regulations to protect workers and the public. Although public exposures to beryllium and public awareness and concern regarding beryllium risks are currently low, beryllium risks have psychometric qualities that may lead to rapidly heightened public concern.