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本文给出了解决等式约束问题的一种信赖域算法。算法用Byrd和Omojokun方法计算试探步,但在计算试探步时采取了降维的方法。在不要求约束条件的梯度是列满秩的条件下证明了算法的全局收敛性。 相似文献
64.
以台湾全家便利连锁店为研究对象,从信任和关系中止的联系出发,采取问卷调查的方法,探讨影响加盟关系中止的主要因素.结果显示:1.加盟者的经济满足和非经济满足与其对加盟总部的信任程度正相关,非经济满足的影响更大.2.总部和加盟者之间的沟通程度与加盟者对加盟总部的信任程度正相关.3.加盟者与总部的非功能性冲突与其对加盟总部的信任程度负相关,功能性冲突与信任程度正相关,且非功能性冲突的影响大于功能性冲突.4.信任是影响加盟关系中止的前因变量,信任在非经济满足和非功能性冲突对关系中止的影响中具有中介效果. 相似文献
65.
Emotions,Trust, and Perceived Risk: Affective and Cognitive Routes to Flood Preparedness Behavior 总被引:1,自引:0,他引:1
Teun Terpstra 《Risk analysis》2011,31(10):1658-1675
Despite the prognoses of the effects of global warming (e.g., rising sea levels, increasing river discharges), few international studies have addressed how flood preparedness should be stimulated among private citizens. This article aims to predict Dutch citizens’ flood preparedness intentions by testing a path model, including previous flood hazard experiences, trust in public flood protection, and flood risk perceptions (both affective and cognitive components). Data were collected through questionnaire surveys in two coastal communities (n= 169, n= 244) and in one river area community (n= 658). Causal relations were tested by means of structural equation modeling (SEM). Overall, the results indicate that both cognitive and affective mechanisms influence citizens’ preparedness intentions. First, a higher level of trust reduces citizens’ perceptions of flood likelihood, which in turn hampers their flood preparedness intentions (cognitive route). Second, trust also lessens the amount of dread evoked by flood risk, which in turn impedes flood preparedness intentions (affective route). Moreover, the affective route showed that levels of dread were especially influenced by citizens’ negative and positive emotions related to their previous flood hazard experiences. Negative emotions most often reflected fear and powerlessness, while positive emotions most frequently reflected feelings of solidarity. The results are consistent with the affect heuristic and the historical context of Dutch flood risk management. The great challenge for flood risk management is the accommodation of both cognitive and affective mechanisms in risk communications, especially when most people lack an emotional basis stemming from previous flood hazard events. 相似文献
66.
从证券投资基金的现状出发 ,针对基金发展中的典型问题 ,进行了多角度的思考 ,提出了一些前瞻性的建议 相似文献
67.
Massimo Conte 《International Review of Sociology》2008,18(3):375-392
The aim of this article is to discuss some of the leading features of Erving Goffman's action theory as an alternative to the ‘orthodox’ paradigms of sociology, viewed as a structuralist and functionalist science that defines social constructs by their shared rules and values, and as a drifting of action, in the sense of intention, toward an individualistic version. The author examines Goffman's shift of the focus of attention from the boundaries of a social sense of action to the social dialectic of ‘defining a situation’ (W. Thomas) as conducted by the social actors in a renewal of Simmel's ‘empowering covenants’ (wechselwirkung) in the multiple casual social connections that make up the ‘social buzz’ in a society. The author moreover discusses Goffman's action as a kind of playacting regulating cognitive and expressive face-to-face ‘traffic’ between the social actors. This relational dynamic creates an interactive play based on encounters – in which one's opening to another is fraught with risks of deception – regulated by trust as a central resource for social interactions. Trust, in its interpersonal and systemic variants, constitutes a universal social datum and an elementary precondition for social exchanges and the cooperation between individuals. Trust, thus, functions as comparer between reciprocal expectations and a regulator of freedom tending to the stability of the social system. 相似文献
68.
A survey of 798 New Jersey residents examined relationships among residents' neighborhood activities, perceptions of neighborhood quality, trust of experts, support for rebuilding cities and equal rights, and degree of optimism. Neighborhood activities increased with lack of trust and optimism. These personality characteristic measures were folded into multidimensional constructs that included local environmental hazards, respondents' ratings of their previous neighborhoods, and some demographic variables. Pessimism and values that support equal rights and rebuilding cities were weakly associated with poor quality neighborhood ratings. 相似文献
69.
How do people know which family member is trustworthy? In this study, the authors tested the hypothesis that people use their perception of a family member's self‐control as an indicator of his or her trustworthiness. Eighty‐four Dutch families consisting of 2 parents and 2 children completed questionnaires assessing each family member's trust in and perceived self‐control of the other 3 family members. This full‐family design enabled the authors to examine their hypothesis in horizontal relationships, between family members of equal status (i.e., parent–parent and sibling–sibling relationships), and vertical relationships, in which partners have unequal status (i.e., parent–child and child–parent relationships). Consistent with the hypothesis, Social Relations Model analyses showed that being perceived as having higher self‐control is related to greater trustworthiness among adults and children in the large majority of horizontal and vertical relationships (10 out of 12). These findings highlight that perceived self‐control is an important factor by which to gauge trustworthiness in families. 相似文献
70.
既往的民营企业研究成果认为,欲解决当前的民营企业二次创业问题,必须对民营企业资产进行股份制改造,实现资产组织形式的多元化,实现所有权与经营权的分离,这样,才可能引入职业经理制。其实,倘若能够在民营企业所有者与职业经理人间建立良好的互信合作,在坚持民营企业资产一元化结构的前提下,也可能有效的引进职业经理制。晋商的成功经验,提供了可资利用的历史资源。 相似文献