全文获取类型
收费全文 | 875篇 |
免费 | 15篇 |
专业分类
管理学 | 161篇 |
民族学 | 2篇 |
人口学 | 86篇 |
丛书文集 | 7篇 |
理论方法论 | 102篇 |
综合类 | 5篇 |
社会学 | 405篇 |
统计学 | 122篇 |
出版年
2020年 | 5篇 |
2019年 | 11篇 |
2018年 | 8篇 |
2017年 | 13篇 |
2016年 | 13篇 |
2015年 | 13篇 |
2014年 | 7篇 |
2013年 | 136篇 |
2012年 | 15篇 |
2011年 | 18篇 |
2010年 | 18篇 |
2009年 | 22篇 |
2008年 | 23篇 |
2007年 | 27篇 |
2006年 | 22篇 |
2005年 | 18篇 |
2004年 | 26篇 |
2003年 | 20篇 |
2002年 | 29篇 |
2001年 | 15篇 |
2000年 | 22篇 |
1999年 | 18篇 |
1998年 | 14篇 |
1997年 | 13篇 |
1996年 | 14篇 |
1995年 | 15篇 |
1994年 | 17篇 |
1993年 | 18篇 |
1992年 | 14篇 |
1991年 | 13篇 |
1990年 | 11篇 |
1989年 | 12篇 |
1988年 | 9篇 |
1987年 | 15篇 |
1986年 | 11篇 |
1985年 | 18篇 |
1984年 | 14篇 |
1983年 | 16篇 |
1982年 | 19篇 |
1981年 | 16篇 |
1980年 | 11篇 |
1979年 | 12篇 |
1978年 | 17篇 |
1977年 | 15篇 |
1976年 | 8篇 |
1975年 | 8篇 |
1974年 | 14篇 |
1972年 | 6篇 |
1968年 | 7篇 |
1967年 | 5篇 |
排序方式: 共有890条查询结果,搜索用时 0 毫秒
81.
The concept of exposure is central to chemical risk assessment and plays an important role in communicating to the public about the potential health risks of chemicals. Research on chemical risk perception has found some indication that the model lay people use to judge chemical exposure differs from that of toxicologists, thereby leading to different conclusions about chemical safety. This paper presents the results of a series of studies directed toward developing a model for understanding how lay people interpret the concept of chemical exposure. The results indicate that people's beliefs about chemical exposure (and its risks) are based on two broad categories of inferences. One category of inferences relates to the nature in which contact with a chemical has taken place, including the amount of a chemical involved and its potential health consequences. A second category of inferences about chemical exposure relates to the pragmatics of language interpretation, leading to beliefs about the motives and purposes behind chemical risk communication. Risk communicators are encouraged to consider how alternative models of exposure and language interpretation can lead to conflicting conclusions on the part of the public about chemical safety. 相似文献
82.
Victoria J. Dreitz James D. Nichols James E. Hines Robert E. Bennetts Wiley M. Kitchens Donald L. Deangelis 《Journal of applied statistics》2002,29(1-4):609-623
The rate of population growth ( u ) is an important demographic parameter used to assess the viability of a population and to develop management and conservation agendas. We examined the use of resighting data to estimate u for the snail kite population in Florida from 1997-2000. The analyses consisted of (1) a robust design approach that derives an estimate of u from estimates of population size and (2) the Pradel (1996) temporal symmetry (TSM) approach that directly estimates u using an open-population capture-recapture model. Besides resighting data, both approaches required information on the number of unmarked individuals that were sighted during the sampling periods. The point estimates of u differed between the robust design and TSM approaches, but the 95% confidence intervals overlapped substantially. We believe the differences may be the result of sparse data and do not indicate the inappropriateness of either modelling technique. We focused on the results of the robust design because this approach provided estimates for all study years. Variation among these estimates was smaller than levels of variation among ad hoc estimates based on previously reported index statistics. We recommend that u of snail kites be estimated using capture-resighting methods rather than ad hoc counts. 相似文献
83.
Effects of Risk and Time Preference and Expected Longevity on Demand for Medical Tests 总被引:1,自引:0,他引:1
Despite their conceptual importance, the effects of time preference, expected longevity, uncertainty, and risk aversion on behavior have not been analyzed empirically. We use data from the Health and Retirement Study (HRS) to assess the role of risk and time preference, expected longevity, and education on demand for three measures used for early detection of breast and cervical cancer—regular breast self-exams, mammograms, and Pap smears. We find that individuals with a higher life expectancy and lower time preference are more likely to undergo cancer screening. Less risk averse individuals tend to be more likely to undergo testing. 相似文献
84.
We describe an approach to the assessment of parenting for families in which child abuse has been established to have occurred. Neither the category of abuse nor its physical severity adequately predicts the future wellbeing or safety of an abused child. The critical variable in determining the child's future is the level of disturbance in parenting. We argue against the most common approach to assessments of parenting, which is to generate a non‐hierarchical list of issues with the emphasis on relatively concrete and readily measurable dimensions such as social support, parental knowledge about parenting and the child's developmental status. We enhance the standard approach to assessment by organizing it around parenting capacity. We do not attempt to operationalize parenting capacity, de?ning it as the parents' ability to empathically understand and give priority to their child's needs. Adequate parenting requires that the parents be able to meet the challenges posed by their particular child's temperament and development (which may be shaped by the abusive experience) and also to accept and be prepared to address their own intrinsic characteristics which impede their parenting capacity. Parenting capacity is more dif?cult to assess than the more concrete and commonly measured aspects of parenting, but we argue that its assessment should be central to child protection management decisions. Copyright © 2004 John Wiley & Sons, Ltd. 相似文献
85.
Donald W. Hine Craig Summers Mark Prystupa Antoinette McKenzie-Richer 《Risk analysis》1997,17(3):293-302
Residents of four northern communities were surveyed about Atomic Energy of Canada Limited's proposal to site an underground repository for high-level nuclear waste somewhere in the Canadian Shield. Opposition to the repository was relatively strong in all communities, but was strongest among aboriginal respondents. Path analysis revealed that trust in nuclear regulators, faith in science and technology, and anticipated net costs were important mediators of this effect. Aboriginals were less trusting, exhibited less faith in science and technology, and perceived the costs associated with the repository to be higher than their nonaboriginal counterparts. No support was found for the hypothesis that, after controlling for aboriginal status, financially insecure individuals would display greater support for the nuclear waste repository than financially secure individuals. Policy implications for balancing perceived risks and siting needs are discussed. 相似文献
86.
87.
88.
Shifts occurred in the availability of rural services in a central-place system of 143 centers in County Tipperary, Ireland, between 1966 and 1986. While there were considerable changes in the degree of availability of individual services, the overall range of services remained relatively stable at the level of the central-place system. Within the hierarchy, there was some evidence of polarization with villages recording the greatest losses and major towns recording the highest increases. New services that had emerged were strongly concentrated in the larger towns at the top of the hierarchy. Aggressive rural development policies had positive effects on the stability of the overall central-place system, although these policies may have had the unintended consequence of increasing polarization within the hierarchy. 相似文献
89.
Parental misuse of drugs or alcohol is known to be a common issue for child care social workers, yet there has been surprisingly little British research on the topic. The study reported here attempts to address this gap. All files going for long‐term allocation in four London boroughs over on average 1 year were examined (290 files). Parental substance misuse (PSM) emerged as a major feature of social work caseloads. Of the 290 cases, 100 (34%) involved concerns about parental substance misuse. The families involving substance misuse were more vulnerable on a variety of measures: the children were younger, the parents had more individual problems and the families lived in more difficult social situations. PSM cases tended to be ‘heavy end’ at the point of allocation: they accounted for 62% of all children subject to care proceedings and 40% of those placed on the child protection register. There was a fairly even spread between alcohol and drug misuse, and a number of cases involved both. Substance misuse specialists were rarely involved in working with families, primarily because parents said that they did not think that they had a problem. Suggestions for ways in which policy and practice with PSM might be improved are made in light of these findings. 相似文献
90.
This article examines the Program Assessment Rating Tool (PART)in the federal budgeting process. The early evidence on PARTprompts the search for a theory of budgeting that accepts thatperformance information will influence decisions but will notbe used in the same way from decision to decision, as the espousedtheory of performance budgeting suggests. Dialogue theory emphasizesthe ambiguity of performance information and related resourceallocation choices. An exploratory test of dialogue theory isundertaken through an experiment involving graduate studentsassessing PART evaluations. The results illustrate a varietyof ways in which different individuals can examine the sameprogram and, using logical warrants, come to different conclusionsabout performance and future funding requirements. 相似文献