Behavioural inhibition and hyperactivity: a commentary from alternative perspectives

Attention disorders in the school population include attention deficit, hyperactivity and conduct disorders. A key concept for distinguishing hyperactive from attention disorders is behavioural inhibition as advocated by Barkley, a prominent American researcher. However, the concept itself needs to be understood because, as argued in this paper, there are two kinds of inhibition: Pavlov's original concept and the American one. These should be differentiated if the abnormal conditions associated with attention and hyperactivity are to be rationally connected to cognitive characteristics, rather than to be solely based on clinical symptoms and behavioural ratings. We suggest a consensus on the concept of inhibition and a unified view of attention disorders integrating cognitive and behavioural manifestations. Finally, the importance of basing remediation on a theoretically supported and rationally derived set of cognitive training tasks for the amelioration of inattention and hyperactivity is offered.     

少数民族传统体育文化资源开发利用的保障机制——以桂滇黔地区为例

由于少数民族传统体育文化保护起步晚和对其保护的公共投入不足,经济发展相对滞后、但传统体育文化资源占优的桂滇黔地区对通过开发传统体育文化具有的经济价值来弥补其保护资金不足有着更为迫切的需求。然少数民族传统体育文化资源的开发利用涉及诸多方面的利益,要实现其开发利用的可持续性,需从法律法规、资金支持、人才培养、规划评估、区域合作等方面建立起一整套有效的保障机制,使其开发利用的综合效益得到充分发挥。     

关于高职院校教师下企业锻炼的几点思考

高职院校教师下企业锻炼有利于教师业务素质的提升和校企合作的开展。针对高职院校教师下企业锻炼实施过程中存在的问题,剖析了问题产生的原因并提出了解决问题的对策：学校、教师、企业三方共同努力,健全制度、积极配合,构建长效机制,推动高职院校教师下企业锻炼活动的深入开展。     

振动沉管桩贯入阻力对设计、施工的影响

振动沉管桩因其在施工中明显的优势而被广泛采用，但实际操作中常出现沉桩达不到设计标高现象，而不得不改变施工工艺、更换设备或变更设计，从而延误工期，增加投资等情况。本文通过对振动沉桩的贯入机理、贯入阻力的估算、取值方法、阻力判定及实例分析，让设计、施工人员在设计、施工沉管桩时能合理地确定施工方法、进度、质量。     

物流系统对环境扰动的机理及相互间的影响探析

作为一项系统工程，物流系统对环境的扰动主要体现在包装、运输、储存保管、装卸搬运、流通加工、配送以及物流信息等方面。扰动的关键原因在于现实中粗放的物流模式、不合理的物流规划、物流标准化的缺乏等因素的影响。现实生活中，环境系统及其环境问题也有可能通过经济系统和法律体系等途径来制约和影响着物流系统的有序运作。     

学历教育院校实验室建设与管理

针对学历教育院校的特点,从实验室管理体制、运行机制等8个方面,论述了如何加强实验室建设与管理,更好地为培养高素质军事人才服务。     

Architecture Singularity Analysis of 4-U■S/U■U 5-DOF Parallel Mechanism

Architecture singularity of a parallel mechanism with five degrees of freedom (DOF) is analyzed. Such mechanism consists of a movable platform connected to the base by five active limbs. Four of them are identical 6-DOF limbs and the last one has the same DOF as the specified DOF of the movable platform. Based on the kinematics analysis, two categories of architecture singularities for such mechanism are proposed. Then the sufficient condition for each singularity is researched. Results show that the mechanism is singular when it employs each category of the proposed architecture, provided that it satisfies the corresponding sufficient condition. It can be concluded that the proposed two categories of architecture singularities should be avoided with the following dimensional synthesis of such mechanism.     

抑制机制发展:认知发展研究的新视野

过去的认知和认知发展研究偏重于对激活过程的考察，随着当前认知科学和神经科学的进一步发展，从新的角度在更高的层次重新触发了人们对认知抑制及其发展机制的兴趣，使之成为国际认知和认知发展领域正在迅速崛起的一个重要课题。从无意向抑制和有意抑制两个方面的介绍可了解认知和认知发展领域近期关于抑制及其发展研究的状况和进展。     

大学生助学贷款的博弈分析

助学贷款本是一项利国利民的政策,但这项政策却遭受了空前的信用危机。文章通过对学生和银行的行为进行博弈分析,认为纯粹靠道德等内在诚信来约束学生的还贷是无用的,必须建立起一套完整的外在诚信约束机制。文章还设计了助学贷款的“三维”被迫诚信机制,以明确助学贷款中政府、银行、贫困生家庭和借款学生的权责和义务。     

氨基苯酚的干法羧基化反应研究

在密闭的容器中,在0.3-0.5M Pa的CO2压力下,将氨基苯酚和碳酸氢钾按物质的量1∶2混合均匀,在180-190℃加热3-4小时,进行干法羧基化反应。实验结果表明:此法对间-氨基苯酚的羧基化效果较好,其产率可达74%,而对邻-氨基苯酚和对-氨基苯酚的羧基化效果较差;羧化反应机理可能是酚氧负离子与CO2光加成,再按Schm idt进行重排。