首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   973篇
  免费   128篇
  国内免费   76篇
  2024年   2篇
  2023年   30篇
  2022年   27篇
  2021年   26篇
  2020年   53篇
  2019年   54篇
  2018年   50篇
  2017年   70篇
  2016年   58篇
  2015年   44篇
  2014年   65篇
  2013年   199篇
  2012年   20篇
  2011年   37篇
  2010年   26篇
  2009年   42篇
  2008年   29篇
  2007年   43篇
  2006年   44篇
  2005年   35篇
  2004年   24篇
  2003年   30篇
  2002年   28篇
  2001年   23篇
  2000年   23篇
  1999年   15篇
  1998年   22篇
  1997年   17篇
  1996年   7篇
  1995年   11篇
  1994年   5篇
  1993年   6篇
  1992年   2篇
  1990年   3篇
  1989年   2篇
  1988年   1篇
  1987年   2篇
  1986年   1篇
  1984年   1篇
排序方式: 共有1177条查询结果,搜索用时 0 毫秒
191.
In this paper, we present a Capabilities-based Approach to the acceptability and the tolerability of risks posed by natural and man-made hazards. We argue that judgments about the acceptability and/or tolerability of such risks should be based on an evaluation of the likely societal impact of potential hazards, defined in terms of the expected changes in the capabilities of individuals. Capabilities refer to the functionings, or valuable doings and beings, individuals are able to achieve given available personal, material, and social resources. The likely impact of a hazard on individuals' capabilities should, we argue, be compared against two separate thresholds. The first threshold specifies the minimum level of capabilities attainment that is acceptable in principle for individuals to have in the aftermath of a hazard over any period of time. This threshold captures the level that individuals' capabilities ideally should not fall below. A risk is acceptable if the probability that the attained capabilities will be less than the acceptable level is sufficiently small. In practice, it can be tolerable for some individuals to temporarily fall below the acceptable threshold, provided this situation of lower capabilities attainment is temporary, reversible, and the probability that capabilities will fall below a tolerability threshold is sufficiently small. This second, tolerable threshold delimits an absolute minimum level of capabilities attainment below which no individual in a society should ever fall, regardless of whether that level of capabilities attainment is temporary or reversible. In this paper, we describe and justify this Capabilities-based Approach to the acceptability and tolerability of risks. We argue that the proposed theoretical framework avoids the limitations in current approaches to acceptable risk. The proposed approach focuses the attention of risk analysts directly on what should be our primary concern when judging the acceptability and the tolerability of risks, namely, how risks impact the well-being of individuals in a society. Also, our Capabilities-based Approach offers a transparent, easily communicable way for determining the acceptability and the tolerability of risks.  相似文献   
192.
进展性脑卒中诊治及相关因素分析   总被引:6,自引:0,他引:6  
进展性脑卒中是缺血性脑血管病最常见的一个临床现象,进展性脑卒中的存在严重影响卒中患者的预后。迄今为止,关于其流行病学资料、发病机制、诊断标准、治疗均是极具挑战性的问题。进展性脑卒中可能是多种原因、多种病理机制所产生的多种状态的组合,治疗的手段应该以开放动脉或通过全身治疗的方法来增加脑灌注压为主。  相似文献   
193.
B2C电子商务中消费者的风险来源及其影响   总被引:10,自引:0,他引:10  
研究目的是通过考察B2C(Business to Consumer)电子商务中消费者知觉到的风险来源来验证电子商务交易中的虚实界面假设。通过访谈法和问卷法调查了337名被试,探讨了B2C电子商务中消费者认知到的风险来源结构,以及这些风险来源对消费者认知风险的影响。结果表明:消费者在B2C电子商务中的认知风险一部分来源于虚实界面  相似文献   
194.
社会医疗保险道德风险博弈与防控措施研究   总被引:8,自引:1,他引:7  
通过对社会医疗保险道德风险产生原因与特征的探讨,根据不完全信息重复博弈模型对社会医疗保险道德风险进行了系统分析,据此提出了社会医疗保险道德风险的防控措施,以期实现对道德风险的有效防控,提高社会医疗保险基金的安全。  相似文献   
195.
This paper considers three general views about the nature of moral obligation and three particular answers (with which these views are typically associated) concerning the following question: if on Monday you lend me a book that I promise to return to you by Friday, what precisely is my obligation to you and what constitutes its fulfillment? The example is borrowed from W.D. Ross, who in The Right and the Good proposed what he called the Objective View of obligation, from which he inferred what is here called the First Answer to the question. In Foundations of Ethics Ross repudiated the Objective View in favor of the Subjective View, from which he inferred a Second Answer. In this paper each of the Objective and Subjective Views and the First and Second Answers are rejected in favor of the Prospective View and a Third Answer. The implications of the Prospective View for another question closely related to the original question are then investigated: what precisely is your right regarding my returning the book and what constitutes its satisfaction?  相似文献   
196.
汪新建  俞容龄 《心理科学》2006,29(1):233-235
从20世纪70年代开始,社会能力的概念为国外研究者广为接受,有关社会能力的理论和实践探索不断深化扩展,西方学者对社会能力的定义和测量、对教师期望、成绩差异、危险行为以及对社会能力的结构、作用和培养方案进行的探讨,极大地增进了教育、心理学工作者对于儿童社会适应和认知发展的理解。西方学者关于社会能力的研究成果对于我国素质教育有着重要的启示。  相似文献   
197.
环境中的风险认知特征   总被引:8,自引:0,他引:8  
于清源  谢晓非 《心理科学》2006,29(2):362-365,357
采用多维度的心理测量范式,研究公众在“影响程度”、“可控性”、“了解程度”、“影响的持续性”、“发生的可能性”、“结果的严重性”六个维度上对39个环境条目的风险认知特征。研究结果验证了“风险程度指标”,并将环境风险划分为“生态环境”“疾病与灾害”“生活环境”三个大类并探讨其风险认知特征。结果显示,由“客观认识”和“主动作用”两维度形成的认知地图可有效地指导风险沟通。  相似文献   
198.
We report three studies in which methodologies from psychophysics are adapted to investigate context effects on individual financial decision‐making under risk. The aim was to determine how the range and the rank of the options offered as saving amounts and levels of investment risk influence people's decisions about these variables. In the range manipulation, participants were presented with either a full range of choice options or a limited subset, while in the rank manipulation they were presented with a skewed set of feasible options. The results showed that choices are affected by the position of each option in the range and the rank of presented options, which suggests that judgments and choices are relative. Copyright © 2006 John Wiley & Sons, Ltd.  相似文献   
199.
通过生育获得脐带血行干细胞移植是治疗重大疾病的一条可行之路,但在治疗遗传性疾病时,当事家庭、检测机构和医疗机构三方都存在着极大的风险,特别是当事家庭很有可能要承受精神和经济上的更大打击,而且客观上造成患病或者携带者人群的进一步扩大,成为一个不可忽视的社会问题。有必要进行充分的伦理思考后提出尽可能周全的办法,以降低各方面的风险。  相似文献   
200.
浅谈ICU中肺损伤与急性呼吸窘迫综合征的防治   总被引:1,自引:0,他引:1  
ICU中危重病人较多,急性肺损伤(ALI)与急性呼吸窘迫综合征(ARDS)较普通病房更为常见,常可由严重的感染、误吸、脓毒症、创伤、反复输血以及弥散性血管内凝血等因素引起,病理生理过程十分复杂,治疗也很困难,须从多个方面综合考虑,才能提高病人的生存率,挽救病人生命。  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号