运用联结主义模型研究知觉边界效应问题

运用了联结主义理论中的级连相关模型,以连续XOR问题为实例,研究了心理学中的知觉边界效应问题。实验结果表明,联结主义模型可以对知觉边界效应进行模拟,表征不同知识结构的神经网络对于连续XOR问题的知觉边界效应没有显著差异。     

Effect of deep cryogenic treatment on carbon segregation in Cr8Mo2SiV tool steel during tempering

Carbon segregation in Cr8Mo2SiV tool steel after common heat treatment (CHT) and deep cryogenic treatment (DCT) has been investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM) extraction replica and three-dimensional atom probe (3DAP) tests. The XRD results show that most of the retained austenite transformed to martensite after DCT. The TEM results confirm the transformation of blocky retained austenite to twin martensite during DCT. The 3DAP results reveal the segregation of carbon atoms and the maximum carbon fraction in carbon-rich regions increases after DCT. The peak carbon concentration in carbon-rich regions of SDC99 steel after CHT and DCT are 8 at. % and 15 at. %, respectively. The segregated carbon atoms grew into nuclei for nanoscale carbides precipitation on subsequent tempering.     

Impact of coherent and incoherent twin boundaries on the microhardness of annealed nanocrystalline Ni–W alloys

The microstructural evolution of nanocrystalline Ni–W alloys with annealing temperature and more specifically grain boundary (GB) character is investigated through several techniques and correlated with the hardening behaviour. It is shown that two distinct regions can be identified in relation to the annealing temperature and the microstructural evolution. At temperatures below 550 °C (Regime I), a small increase in grain size is observed and is accompanied by a significant hardening and an increase in the fraction of Σ3 incoherent twin boundaries. At temperatures above 550 °C (Regime II), the thermal stability is overcome and important grain growth occurs with a decrease in both the volumic fraction of GBs and the microhardness. It is suggested that the microhardness evolution during heat treatment is influenced by two opposing processes: an increase in the fraction of incoherent twin boundaries (hardening effect) and grain growth (softening effect). Both aspects are directly associated with the mean free path of mobile dislocations.     

Quackademia? Mass-Media Delegitimation of Homeopathy Education

In response to concerns about the standards of training for non-medically qualified homeopathic practitioners, between 1999 and 2009 a number of UK universities taught Bachelor of Science (BSc) degrees in homeopathy. All the courses were subsequently closed following media coverage of a vigorous campaign from scientists against the degree courses. A boundary-work analysis of 65 articles published in the UK print media reveals the use of metaphors from a number of different fields as rhetorical strategies to malign homeopathy education. As well as the commonly used contrasts of profit versus academic integrity, rationality versus faith and logic versus magic, media reports associated homeopathy with new universities and Mickey Mouse degrees, both of which had been denigrated in the press previously. In the press coverage, much attention was also drawn to the fact that the method of repeatedly diluting homeopathic medicines defies both logic and common sense, and the plausibility argument became a decisive blow in the debate over the legitimacy of teaching homeopathy as a science degree. It seems that the boundary work sought to protect the authority of both science and medicine by expelling homeopathy from higher education. These findings contrast with previous studies that suggest that orthodox medicine has occasionally expanded to incorporate desirable aspects of complementary and alternative therapies. Scientists carry out boundary work not just to demarcate the boundaries of science and directly defend their own interests, but also to protect the authority of other allied professions.     

高校辅导员的边界分割偏好与工作-非工作冲突:边界分割管理策略的调节作用

采用问卷调查法,对312名高校辅导员进行调查,探讨边界分割偏好、组织分割供给和个人边界分割策略与工作-非工作冲突的关系。结果表明:(1)辅导员的边界分割偏好与工作-非工作冲突正相关;(2)组织分割供给和个人边界分割策略均能减弱边界分割偏好与工作-非工作冲突之间的正相关。本研究提示高校应在不影响工作的前提下尽量向辅导员提供更多的组织分割供给,同时辅导员也可以通过灵活运用边界分割策略,进行自主的工作-非工作边界管理。     

社交电商中的社交-消费转换机制

社交情境和消费情境之间可以相互转换是社交电商的重要特征, 然而这种相互转换在现有社交电商采纳行为研究中却没有得到应有的重视。社交-消费转换概念的提出很好地弥补了上述研究不足。社交-消费转换是指用户从社交情境到消费情境的转换过程。基于边界理论, 从社群和用户两方面系统分析社交-消费转换的影响因素与促进机制, 有望构建体现社交电商专属特性的新理论, 帮助人们更加完整地理解社交电商采纳行为, 并为促进社交-消费转换提供切实可行的实践建议。研究内容具体包括以下4个方面：(1)社交电商中社交-消费转换的内涵与外延; (2)社群边界整合供给对整合型社交边界与社交-消费转换的影响; (3)用户边界分割偏好对整合型社交边界与社交-消费转换的影响; (4)社群边界定制氛围对整合型社交边界与社交-消费转换关系的调节作用。     

领导者对员工主动行为的心理与行为反应

员工主动行为因有利于个人和组织的长远发展而受到学界和业界的广泛关注。以往的研究主要关注主动行为对员工本人的人际内影响,而较少考虑对领导者的人际间影响;同时,考虑到员工在领导过程中扮演的重要角色,对员工的主动行为如何影响领导的心理与行为反应做理论性整理将极大丰富对员工主动行为的认识。学界基于归因理论、内隐追随理论、自我-他人评价一致性理论等对上述自下而上的影响过程进行了初步探索,发现领导者对员工主动行为的态度评价和行为反应受到多重边界条件的影响。未来研究可具体化员工主动行为所诱发的领导者心理与行为反应,探索员工主动行为与领导方式的循环关系,以及深挖主动行为与绩效评价之间的内在机理。     

医务人员在医疗活动中的利益边界与道德责任分析

当今是一个以利益为轴心的时代,利益伦理是医学伦理学不可忽视的课题。欲望是无穷的,利益是有限的,任何利益都有其边界和限度,我们必须设置利益的道德界限。医患双方未能遵守利益限度和利益边界原则,使矛盾转化为冲突。利益冲突不仅影响医生的专业判断,而且影响了其医疗决定。医生既是医疗职业者,也是社会的一员,社会公众利益最大化是医疗服务的基本目标,为病人最大利益着想是医护专业最根本的道德规范与责任。     

员工职业生涯自我管理的研究进展

随着经济全球化进程的加快和后工业社会的到来,组织不得不越来越频繁地进行各种变革,这对企业员工的职业发展提出了严峻的挑战。在这种形势下,企业员工应当积极地采取各种有效的行为策略,以此加强对职业生涯的自我管理,消除职业发展中的阻滞状态,从而实现自己预期的职业目标。