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   6632篇
  免费   481篇
  国内免费   36篇
管理学   140篇
劳动科学   1篇
民族学   75篇
人口学   355篇
丛书文集   347篇
理论方法论   709篇
综合类   2163篇
社会学   2030篇
统计学   1329篇
  2024年   31篇
  2023年   104篇
  2022年   60篇
  2021年   105篇
  2020年   165篇
  2019年   236篇
  2018年   279篇
  2017年   349篇
  2016年   250篇
  2015年   205篇
  2014年   307篇
  2013年   1233篇
  2012年   439篇
  2011年   281篇
  2010年   298篇
  2009年   302篇
  2008年   295篇
  2007年   315篇
  2006年   299篇
  2005年   283篇
  2004年   255篇
  2003年   229篇
  2002年   174篇
  2001年   177篇
  2000年   142篇
  1999年   66篇
  1998年   51篇
  1997年   44篇
  1996年   35篇
  1995年   28篇
  1994年   21篇
  1993年   20篇
  1992年   24篇
  1991年   13篇
  1990年   11篇
  1989年   7篇
  1988年   2篇
  1985年   2篇
  1984年   2篇
  1983年   2篇
  1982年   1篇
  1981年   2篇
  1980年   4篇
  1978年   1篇
排序方式: 共有7149条查询结果,搜索用时 343 毫秒
91.
台湾是目前世界上唯一通过正式颁布“家庭教育法”来推动家庭教育事业发展的地区。台湾地区家庭教育政策法规的制订实施对大陆地区具有重要的借鉴意义。台湾地区家庭教育政策法规的制订体系完整,并经过多次修订。台湾地区家庭教育政策法规有稳定的实施机构,有力的经费支持,整合的政府资源以及配套的活动课程。大陆地区应加快家庭教育法治化进程,成立家庭教育立法小组,立体化家庭教育服务网络,建立家庭教育经费保障机制,配套有地方特色的活动课程并重视培养家庭教育专业人才。  相似文献   
92.
家庭和社区参与的高质量学前教育是乡村振兴计划的基础。通过对我国西部S省农村地区的两次实地调查发现,受该地区园所特点、教育政策和传统观念等的影响,农村地区幼儿园运用家庭和社区资源总体较低但也有所改善,对家庭资源的运用高于社区资源,对社区历史文化资源的运用较为薄弱。基于此结果提出了运用家庭和社区资源是农村幼儿园发展的必然选择;利用政策杠杆发掘农村地区家庭和社区资源;职后培训提高农村幼儿园教师运用家庭和社区资源的实效性等建议。  相似文献   
93.
基于发展新理念对粮食类家庭农场成长绩效的评价指标进行理论遴选后,借助专家评审和鉴别力分析进行指标筛选,构建了具有较高信度和效度的评价指标体系。以华北平原五省的453户粮食类家庭农场为样本,采用AHP-模糊综合评价模型,对指标体系做了应用研究。结果表明:粮食类家庭农场成长绩效虽在总体上处于中等偏上水平,但个体间存在一定的成长绩效差异;经济绩效整体表现良好,创新绩效却较低。因此,应引导粮食类家庭农场平衡性成长、制定精准扶持方略和建立成长绩效监测体系。  相似文献   
94.
新型农业经营主体的经营绩效关系到其可持续发展。采用农村固定观察点对我国各省区新型农业经营主体的调查数据,运用随机前沿分析法,对不同类型的经营主体的经营绩效进行分析,并进一步分析新型农业经营主体的差异性。结果表明:相比小农户而言,新型农业经营主体的经营绩效相对较高,但是其平均绩效还有很大的改善空间;新型农业经营主体面临融资难和人才缺乏的问题,且该问题在农民专业合作社中最为突出;我国家庭农场的经营绩效在三种新型农业经营主体中是最高的,其次是农业(龙头)企业,最后是农民专业合作社。对此,提出应完善土地“三权分置”机制,实现新型农业经营主体的规模化生产,进一步解决其融资难和人才缺乏的问题,加大政策扶持力度等建议。  相似文献   
95.
Parenting interventions were an important feature of New Labour’s policies to combat social exclusion. This paper critically examines parenting programmes for families with adolescents, assessing national and local policy aims against the perspectives of women who took part in a parenting course, which was the subject of a local evaluation. The paper argues that, while there were important positive outcomes for the participants, the high levels of unmet need which women reported reflect important disparities between the aims of the intervention, the level of service provision, and the needs and concerns of mothers and grandmothers.  相似文献   
96.
Palliative care is specialized health care to improve quality of life for patients with serious illness and their families through prevention and relief of suffering. A Palliative Care Institute was held in western Washington to capture community voices about diverse needs, strengths, and opportunities for improvement of palliative care. Researchers employed qualitative methods to obtain thematic data, provide real-time analysis, and engage in a multivoting technique to reflect stakeholder interest in individual themes and prioritize larger group interests. Bronfenbrenner’s ecological systems framework was used to explore caregiver experiences. Within the microsystem, caregivers reported difficulties in interactions with medical providers as a key challenge. Within the mesosysytem, interactions between patients and medical providers and the impact on caregivers were explored. Within the exosystem, caregivers reported lack of control over the schedules of personal care staff. Macrosystem influences included impact of local culture on the development of palliative care services. Chronosystem influences include de-medicalization of childbirth and its impact on perceptions of palliative care. Implications include the need for social workers to be proactive in fostering trust and effective communication between care providers and caregivers, and the demand for health care provider training in communication with patients and families.  相似文献   
97.
This paper contains an application of the asymptotic expansion of a pFp() function to a problem encountered in econometrics. In particular we consider an approximation of the distribution function of the limited information maximum likelihood (LIML) identifiability test statistic using the method of moments. An expression for the Sth order asymptotic approximation of the moments of the LIML identifiability test statistic is derived and tabulated. The exact distribution function of the test statistic is approximated by a member of the class of F (variance ratio) distribution functions having the same first two integer moments. Some tabulations of the approximating distribution function are included.  相似文献   
98.
中国封建社会伦理之中,积淀了丰富的以"尊亲"、"顺亲"、"养亲"等为主要内容的父子伦理精义;在中国社会结构由金字塔型演变为橄榄型、步入了后喻社会时代的今天,封建社会时代形成的许多父子伦理内容和沟通模式已不适合当今社会时代的发展要求。在今日中国社会伦理系统之中,应该建立新型的父子伦利(互利)关系。这既需要借鉴现代社会的"互喻"模式,又要采补传统伦理的精髓内容。  相似文献   
99.
In a smoothing spline model with unknown change-points, the choice of the smoothing parameter strongly influences the estimation of the change-point locations and the function at the change-points. In a tumor biology example, where change-points in blood flow in response to treatment were of interest, choosing the smoothing parameter based on minimizing generalized cross-validation (GCV) gave unsatisfactory estimates of the change-points. We propose a new method, aGCV, that re-weights the residual sum of squares and generalized degrees of freedom terms from GCV. The weight is chosen to maximize the decrease in the generalized degrees of freedom as a function of the weight value, while simultaneously minimizing aGCV as a function of the smoothing parameter and the change-points. Compared with GCV, simulation studies suggest that the aGCV method yields improved estimates of the change-point and the value of the function at the change-point.  相似文献   
100.
This paper considers the design of accelerated life test (ALT) sampling plans under Type I progressive interval censoring with random removals. We assume that the lifetime of products follows a Weibull distribution. Two levels of constant stress higher than the use condition are used. The sample size and the acceptability constant that satisfy given levels of producer's risk and consumer's risk are found. In particular, the optimal stress level and the allocation proportion are obtained by minimizing the generalized asymptotic variance of the maximum likelihood estimators of the model parameters. Furthermore, for validation purposes, a Monte Carlo simulation is conducted to assess the true probability of acceptance for the derived sampling plans.  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