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   1878篇
  免费   86篇
  国内免费   25篇
管理学   351篇
民族学   7篇
人口学   31篇
丛书文集   108篇
理论方法论   103篇
综合类   1145篇
社会学   197篇
统计学   47篇
  2024年   6篇
  2023年   21篇
  2022年   19篇
  2021年   27篇
  2020年   54篇
  2019年   46篇
  2018年   56篇
  2017年   60篇
  2016年   57篇
  2015年   84篇
  2014年   134篇
  2013年   217篇
  2012年   127篇
  2011年   160篇
  2010年   129篇
  2009年   106篇
  2008年   91篇
  2007年   98篇
  2006年   117篇
  2005年   81篇
  2004年   68篇
  2003年   65篇
  2002年   32篇
  2001年   24篇
  2000年   18篇
  1999年   12篇
  1998年   6篇
  1997年   5篇
  1996年   4篇
  1995年   5篇
  1994年   5篇
  1993年   7篇
  1992年   6篇
  1991年   6篇
  1990年   2篇
  1989年   4篇
  1988年   2篇
  1987年   11篇
  1986年   1篇
  1985年   2篇
  1984年   6篇
  1983年   3篇
  1981年   4篇
  1980年   1篇
排序方式: 共有1989条查询结果,搜索用时 31 毫秒
101.
当前,土地违法现象较为普遍,土地违法违纪在一定范围内存在。现行以行政管理为主的土地资源保护制度存在的问题。不利于国家土地保护目标的实现。建立土地行政公益诉讼制度将是应对土地资源保护不力局面的可行选择。  相似文献   
102.
Both treatment efficacy and safety are typically the primary endpoints in Phase II, and even in some Phase III, clinical trials. Efficacy is frequently measured by time to response, death, or some other milestone event and thus is a continuous, possibly censored, outcome. Safety, however, is frequently measured on a discrete scale; in Eastern Cooperative Oncology Group clinical trial E2290, it was measured as the number of weekly rounds of chemotherapy that were tolerable to colorectal cancer patients. For the joint analysis of efficacy and safety, we propose a non-parametric, computationally simple estimator for the bivariate survival function when one time-to-event is continuous, one is discrete, and both are subject to right-censoring. The bivariate censoring times may depend on each other, but they are assumed to be independent of both event times. We derive a closed-form covariance estimator for the survivor function which allows for inference to be based on any of several possible statistics of interest. In addition, we derive its covariance with respect to calendar time of analysis, allowing for its use in sequential studies.  相似文献   
103.
Informal Food Production in the Enlarged European Union   总被引:1,自引:0,他引:1  
How widespread is the production of food in old and new member states of the European Union and what is the social meaning or logic of such activities? We show that growing food is (a) more widespread in former communist countries than in traditional market economies and (b) is predominantly a hobby or recreational activity in affluent countries, but a coping strategy in reaction to experienced difficulties in making ends meet in poorer nations, and especially so in the former communist countries.  相似文献   
104.
Within the extensive food insecurity literature, little work has been done regarding (a) the depth and severity of food insecurity and (b) the food insecurity of American Indians. This paper addresses both these topics with data from the 2001 to 2004 Core Food Security Module of the Current Population Survey. To measure food insecurity, three axiomatically derived measures of food insecurity are used. As expected, given the worse economic conditions facing American Indians, their food insecurity levels are generally higher than non-American Indians. However, the magnitude and significance of these differences differ depending on the choice of food insecurity measure.
Craig GundersenEmail:
  相似文献   
105.
通过对与水路运输系统相关管理体系的介绍与分析,从管理体系标准内容、体系审核特点、审核员管理、体系实施效果、体系发展趋势等方面总结这些管理体系的特点,并提出加强和改善水路运输系统管理体系建设的建议。  相似文献   
106.
A common risk among adolescents is sexual solicitation, in which an adolescent is asked to provide sexual information, engage in sexual talk, or in sexual activities. Although scholars increasingly address this topic from an intrapersonal perspective, there is little attention to factors of language use and message content. In two focus group studies, we investigated whether adolescent girls consider themselves capable of assessing whether an online stranger is an adult or a peer, the extent to which adolescent girls actually succeed in making this assessment, the strategies they apply to do so, and the content- and language-related cues focused on. Our findings suggest that most of the adolescent girls are confident in their ability to assess whether the stranger is a peer or an adult with possible sexual intentions. However, we also found that only 43% were able to correctly make this assessment. Most of the adolescents seem to apply the passive strategy of uncertainty reduction: They scan the profile page of the stranger, check contact information, and the profile picture. They may choose to apply the interactive strategy to find out more about the online stranger. Important content-related cues that alarm adolescent girls are: ignoring personal questions, showing an exaggerated amount of interest, acting as a friend, and being sexually oriented. Language cues mentioned related to word usage, abbreviations, sentence length, and tone.  相似文献   
107.
This article contributes to anthropological discussions about care, food and morality by considering the gastro-morality of Yolngu people living in Galiwin’ku in the 2000s. I develop the concept of ‘trans-material morality’ to capture the ways that food takes on material, emotive and ontological forms of morality. Food is central to articulating expressions of care, as well to experiencing feelings of being cared for and, inversely, feelings of not being cared for. This is done by way of the meanings of good and bad that are attached to the food itself and by way of eating and acts of sharing and not sharing. I argue that largely because of food’s capacity to exist as trans-material morality, it is a particularly compelling thing with which to moralise, both in the intimate interactions of day-to-day life and in the grander theorising that human beings undertake to paint a picture of moral change.  相似文献   
108.
In 2012, the Australian Government announced the establishment of a Royal Commission into Institutional Responses to Child Sexual Abuse. The aim of the Royal Commission is to understand how and why sexual abuse occurred within Australian institutions and to provide guidance as to how future abuse might be prevented. The Royal Commission commissioned a mixed methods study to explore what children need to be safe and to feel safe, to explore how they determine their level of safety, and their observations about how institutions act to prevent and respond to safety issues. This article reports on the findings from the first phase of the study that involved focus groups carried out with children aged 4–17 years from different types of institutions. The discussion focused particularly on how children conceptualise safety and how they make judgments about their levels of safety. Children and young people's conceptualisation of safety had multiple dimensions, which include the idea that being safe and feeling safe are two distinct, interrelated but sometimes non‐concurrent experiences; that safety is identified and experienced as a set of feelings; trusting relationships are the foundation of safety; familiarity helps children feel safe; and safe environments are those that are ordered and orderly.  相似文献   
109.
ABSTRACT

Recently, the FDA announced that it would soon lift the long-standing lifetime ban on blood donation by men who have sex with men (MSM). Reexamining blood donation by MSM, it is clear that there are several ethical goods that must be balanced. Through balancing the primary duty to safety with the imperatives to craft a policy that is formally equal, upholds the public's trust, and is nondiscriminatory, an ethical blood donation deferral guideline may be advanced, both for MSM and the population at large.  相似文献   
110.
信息工具选择和运用直接关系到食品安全风险行政规制的效果.食品安全风险行政规制中信息工具的应用涵盖了信息收集渠道、信息公示平台、安全信息管理以及事后监管机制等.同时,食品安全风险行政规制信息工具存在具有信息来源与收集路径的单一性、信息流通的内部性、信息控制与公布的主体的多重性和相对人权利救济的滞后性等缺陷.为此,需要有针对性地拓展网络信息的收集路径;严格信息流通的责任制度;加强信息工具与其他工具的组合运用;完善风险信息发布的相对人救济机制,并引入预防性诉讼和公益诉讼制度.  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