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排序方式: 共有375条查询结果,搜索用时 31 毫秒
81.
大学生普遍重视自我表露的作用,认为自我表露可以促进交流,同时也会暴露自身弱点;对方的个人特质是影响表露的重要因素;男生比女生表露少,男生更加担心表露后带来的不良评价,女生更强调表露的适度原则。  相似文献   
82.
Summary.  Cancer surveillance research requires accurate estimates of risk factors at the small area level. These risk factors are often obtained from surveys such as the National Health Interview Survey (NHIS) or the Behavioral Risk Factors Surveillance System (BRFSS). The NHIS is a nationally representative, face-to-face survey with a high response rate; however, it cannot produce state or substate estimates of risk factor prevalence because the sample sizes are too small and small area identifiers are unavailable to the public. The BRFSS is a state level telephone survey that excludes non-telephone households and has a lower response rate, but it does provide reasonable sample sizes in all states and many counties and has publicly available small area identifiers (counties). We propose a novel extension of dual-frame estimation using propensity scores that allows the complementary strengths of each survey to compensate for the weakness of the other. We apply this method to obtain 1999–2000 county level estimates of adult male smoking prevalence and mammogram usage rates among females who were 40 years old and older. We consider evidence that these NHIS-adjusted estimates reduce the effects of selection bias and non-telephone coverage in the BRFSS. Data from the Current Population Survey Tobacco Use Supplement are also used to evaluate the performance of this approach. A hybrid estimator that selects one of the two estimators on the basis of the mean-square error is also considered.  相似文献   
83.
论速度经济下的价值链管理创新   总被引:2,自引:0,他引:2  
从速度经济时代的现实出发,运用企业动态竞争优势和价值链管理理论,分析了竞争优势的传统价值链管理,指出了传统价值链管理的内涵与局限,提出了价值链管理的理论演化,构建了动态价值链管理的五大模式。  相似文献   
84.
在大众传媒的新闻报道中,隐性采访被越来越广泛地运用.隐性采访在舆论监督中具有一定的作用,它是显性采访的必要补充,是在特殊情况下进行舆论监督的必要手段.但是隐性采访不得侵犯隐私权,不得逾越一定的界限.  相似文献   
85.
Contingency rerouting is known as a cost-effective risk management strategy for major disruptions such as earthquakes and natural disasters. The objective of this paper is to develop a decision-making tool to determine the appropriate response speed of a volume-flexible backup supplier to improve the supply chain responsiveness. We propose a mixed integer programming (MIP)-based capacity planning tool which generates the contingency plan of the supply chain subject to random disruptions. In order to make an accurate decision, the impact of critical operational characteristics such as response time and congestion are considered in a disruption scenario. The appropriate response speed is selected through a decision tree analysis by minimizing the expected supply chain costs. The selection is made with respect to three different attitudes of the decision maker towards risk. In order to evaluate the impact of the different failure and recovery probabilities over the selection process, a sensitivity analysis is presented. The results show that considering congestion is especially critical for risk-neutral decision makers in mitigating against disruptions.  相似文献   
86.
Abstract

Alcohol abuse among college students is prevalent, yet few instruments with sound reliability and validity are available to assess these problems in this population. As part of a large, baseline assessment battery for a prospective study of offspring of alcoholics, the 27-item Young Adult Alcohol Problems Screening Test (YAAPST) was given to 490 freshmen at a large mid western university; approximately 9 months later, 482 subjects completed the scale again. In addition to asking about such traditional problems as experiencing blackouts and driving while intoxicated, the YAAPST included specific items relating to college experiences (eg, getting into sexual situations that were later regretted, missing classes, and receiving lower grades than usual). The YAAPST was designed to assess these drinking consequences over two different time frames, lifetime and past year, and also to indicate the frequency of occurrence during the past year. Results indicated that the YAAPST is a unidimensional scale with good psychometric properties (good internal consistency and test-retest reliability). Three different approaches were used to demonstrate the validity of the YAAPST. Findings supported criterion validity (with interview-based alcohol abuse/dependence diagnoses as the criterion), concurrent validity (comparing the YAAPST with other drinking measures), and construct validity (correlating the YAAPST with etiologically relevant personality, motivational, and peer influence variables). The YAAPST is a promising screening instrument for alcohol problems in college students. It has excellent psychometric properties and the potential to provide a range of useful information to the clinician or researcher.  相似文献   
87.
加快河南省高等教育发展的社会基础分析   总被引:1,自引:1,他引:0  
文章从现有河南省社会经济发展水平,产业结构演变趋势,社会公众对高等教育需求愿望和支付能力,河南省高等教育自身智力贮备等方面进行了分析探讨,认为快速发展河南省高等教育已具备了很好的社会基础。河南省高等教育应在规模、速度以及质量和层次上来一次革命性的历史突破。  相似文献   
88.
This paper examines public relations (PR) functions in a large Japanese corporation as well as the PR role in the management function. The corporation under study is Kao Corporation, which is one of the largest Japanese consumer and industrial goods manufacturers. Information was collected from interviewing a PR manager of Kao Corporation. Evidence suggests that Kao's PR department functions more or less like an advertising department. Press releases are placed in the media as paid advertisements. Kao's PR uses a third-party endorsement to establish a new product's credibility. The company has a participative corporate culture that allows the PR director to work closely with the top management. The idea of collaborative efforts between departments and the practice of being a socially responsible company suggest that Kao's PR department uses a combination of communication models and Japanese management styles to project a good corporate citizen image.  相似文献   
89.
钢 混凝土组合深梁填充钢框架是一种新型抗侧力结构体系。用有限元分析软件SAP2000对6层钢框架和6层钢框架填充组合深梁进行了动力非线性时程分析,得到结构的顶点位移、基底剪力、层间位移角、楼层位移及塑性铰发展情况。通过对比分析发现,钢框架内填深梁以后,结构刚度和承载能力增强,且深梁首先破坏,保证钢框架安全,充分起到了抗震第一道防线的作用。  相似文献   
90.
我国各区域服务业发展水平差异较大。从发展规模、增长速度、行业结构、经济效益、对外开放程度等方面对我国服务业区域发展水平进行比较研究,有利于准确判断服务业在各区域的发展差异及其程度,为相关部门制定正确的区域服务业发展政策与战略提供信息支持。  相似文献   
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