High-magnetic-field-induced formation of aligned equiaxed grains during directional solidification

The application of a high magnetic field is capable of inducing the formation of aligned equiaxed grains in alloys during directional solidification. The alignment and refinement of the grains is enhanced as the magnetic field intensity increases. The thermoelectric power difference at the liquid/solid interface in four alloys has been measured in situ during directional solidification and it is concluded that the formation of aligned equiaxed grains in a magnetic field should be attributed to the combined action of a thermoelectric magnetic force and a magnetization force.     

社会快感缺失认知过程的跨诊断研究进展

社会快感缺失具有广泛的跨诊断和亚临床特征,包括孤独感、内向性、社交焦虑和社会功能受损等。传统医学模型聚焦于社会快感缺失相关疾病的诊断和神经生理机制,促进了社会快感缺失药物和神经靶向治疗。然而社会快感缺失广泛地存在于健康人群和亚临床人群中,只有寻找有效的心理咨询和治疗方案,才会对亚临床人群社会快感缺失的缓解和社会功能的提升提供帮助。认知过程模型聚焦于积极效价系统,强调对积极奖赏刺激注意、记忆、心理意象等认知过程的提升,该模型将是社会快感缺失心理咨询与治疗的有效途径。

     

情境与互动：人际互倚及其模

人际互倚理论主要关注群体中个体之间的相互依附关系。文章介绍了互倚理论的历史发展,论述了人际互倚理论发展中研究方法的改进：从结果矩阵到转换细目表。方法的改进推动了重视情境的人际互倚情境模式的发展,使人际互倚理论从研究静态人际互倚关系转向研究动态人际互倚的转换过程。该文还对人际互倚研究进行了评价和展望     

初中生对父母冲突的知觉结构分析

以我国初中生为研究对象,以Grych等人的父母冲突子女知觉量表为工具,对量表是否适用于中国的初中生进行了验证研究,以此探明了初中生对父母冲突知觉的结构,初中生对父母冲突知觉问卷具有良好的信度和效度。     

风险决策中动态框架效应研究

风险决策的框架效应一直是理论研究和实践应用的焦点。该研究利用计算机联网模拟团队分布式动态风险决策任务,从三个方面（过去绩效,启动资金和目标设置）研究决策者在动态条件下风险偏好的变化规律。研究发现“目标设置”因素框架效应具有抑制作用,“启动资金”因素对个体和团队有不同影响。研究结果表明,风险敏感性同样适用于解释动态情境下的风险偏好。     

管理胜任力特征分析:结构方程模型检验

管理胜任力特征分析是人事选拔与评价的重要内容之一。本研究在运用基于胜任力的职位分析并总结国内外有关文献的基础上,编制了管理综合素质评价量表,并运用此量表调查了220名中高层管理者,采用因素分析和结构方程模型检验企业高级管理者胜任力特征的结构。结果表明,管理胜任力特征结构由管理素质和管理技能等两个维度构成,但在维度要素及其关键度上,职位层次间存在显著差异。本研究为管理职位的测评选拔提供了新的理论依据。     

Alteration of cingulate long-term plasticity and behavioral sensitization to inflammation by environmental enrichment

Exposure to an enriched environment (EE) has been shown to induce cortical plasticity. Considerable amount of research is focused on the effects of EE in the hippocampus; however, effects of EE on other brain regions and the mechanisms involved are not well known. To investigate this, we induced cortical plasticity by placing mice in an EE for one month and measured the effects of EE in the anterior cingulate cortex (ACC). Here, we show that EE enhanced the expression of the plasticity gene, egr-1, in the ACC of EE animals accompanied by enhanced cingulate long-term potentiation (LTP) and decreased cingulate long-term depression (LTD). The increased NMDA receptor NR2B/NR2A subunits current ratio is associated with the plasticity seen in the ACC while total protein levels remain unchanged. Furthermore, behavioral experiments show that these mice exposed to EE demonstrate enhanced responses to acute and long-term inflammation. Our findings suggest that exposure to EE alters physiological properties within the ACC which results in enhanced responses to inflammation.     

略论清代前期的五台山藏传佛教

清代前期,因五台山独特的地理优势,博大而悠久的佛教文化和清朝统治者的极力推崇,五台山藏传佛教渐至鼎盛。清初诸帝多次巡幸五台山;蒙藏高僧频繁朝拜;藏传佛教寺院数量、僧人人数迅猛增加;寺院管理制度日趋完善,为清初巩固民族团结和国家统一做出了重要贡献。     

绘画疗法——心理治疗的艺术途径

绘画疗法是以绘画作为治疗师和患者间的中介物来进行治疗的。目前,我国关于这一心理治疗方法的研究和应用都比较少。本文简单介绍了绘画疗法的理论基础、作用机理、实际操作、应用现状及疗效,并初步提出绘画疗法以后的研究方向。     

Wear behaviour of a gradient surface produced by a punching process in a Cu-30 Ni alloy

The grain size variation in a gradient surface produced by a punching and recovery process on a Cu-30Ni alloy has been observed by atomic force microscopy. The friction characteristics of the gradient surface in a 3.5 wt% NaCl solution were investigated using a micro-indenter probe, a pin-on-disc type tribometer, a strain sensor and an optical microscope. The results showed that the hardness and grain size can be well represented by the Hall–Petch relationship when the gain size is more than 30?nm. The wear rate, friction coefficient and adhesive force all increase depth below the surface. These variations are attributed to a gradual increasing grain size with depth. The morphologies of the worn track were also studied to understand further the corrosive wear behaviour of gradient surfaces.