全文获取类型
收费全文 | 142874篇 |
免费 | 6050篇 |
国内免费 | 973篇 |
专业分类
管理学 | 2085篇 |
劳动科学 | 30篇 |
民族学 | 2549篇 |
人才学 | 17篇 |
人口学 | 1950篇 |
丛书文集 | 20646篇 |
理论方法论 | 6285篇 |
综合类 | 107325篇 |
社会学 | 4197篇 |
统计学 | 4813篇 |
出版年
2024年 | 93篇 |
2023年 | 612篇 |
2022年 | 958篇 |
2021年 | 1097篇 |
2020年 | 1378篇 |
2019年 | 1242篇 |
2018年 | 1279篇 |
2017年 | 1664篇 |
2016年 | 1885篇 |
2015年 | 2700篇 |
2014年 | 6857篇 |
2013年 | 7531篇 |
2012年 | 8543篇 |
2011年 | 10296篇 |
2010年 | 8388篇 |
2009年 | 8643篇 |
2008年 | 9135篇 |
2007年 | 11615篇 |
2006年 | 11787篇 |
2005年 | 10929篇 |
2004年 | 10313篇 |
2003年 | 10143篇 |
2002年 | 8047篇 |
2001年 | 6773篇 |
2000年 | 3826篇 |
1999年 | 1062篇 |
1998年 | 517篇 |
1997年 | 421篇 |
1996年 | 353篇 |
1995年 | 308篇 |
1994年 | 224篇 |
1993年 | 182篇 |
1992年 | 154篇 |
1991年 | 119篇 |
1990年 | 67篇 |
1989年 | 57篇 |
1988年 | 65篇 |
1987年 | 21篇 |
1986年 | 25篇 |
1985年 | 100篇 |
1984年 | 103篇 |
1983年 | 73篇 |
1982年 | 66篇 |
1981年 | 60篇 |
1980年 | 50篇 |
1979年 | 52篇 |
1978年 | 48篇 |
1977年 | 16篇 |
1976年 | 12篇 |
1975年 | 6篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
Donna J. Drucker 《Feminist Media Studies》2018,18(5):859-872
This article examines the fictional characterization of the real-life sex researchers and scientists William H. Masters and Virginia E. Johnson in the Showtime television program Masters of Sex (2013–2016). The historical Johnson had a complicated relationship with second-wave feminism: she disdained the movement and was interested primarily in improving heterosexual marriages and the sex lives of married couples. The Johnson character speaks in a language of postfeminism with minimal interest in collective action and broader social change. However, second-wave feminists later used her and Masters’ research in order to support their own beliefs about sexual autonomy and freedom, within and beyond marriage and heterosexuality. The television program demonstrates Johnson’s importance to both phases of her and Masters’ research—in the first phase, when they are based in a hospital and university environment, and in the second, when they establish their own research institute and raise funds directly from the clients that they serve. Johnson exemplifies postfeminist depictions of ambitious women in prestige television, her aim to have a successful career and marriage conflict, and while she is willing to compromise scientific values to serve her own goals, her male colleagues temper that ambition in service of “objective” science. 相似文献
42.
As part of a broader program of market reform, China's local governments are progressing an agenda of purchasing child welfare and other social services from the nongovernment sector, primarily to expand capacity and address vast unmet need. This paper draws on current research evidence to explore the approaches to purchasing emerging in China, examining the rationale for purchasing and models of supply, competition, and regulation. While some approaches are modeled on direct service contracting, direct purchasing of social service “posts” is also used, aimed at achieving goals of professionalization alongside service expansion. Overall, the review shows purchasing is helping to rapidly expand service scale and capacity; however, regulatory strategies for managing and mitigating risks to quality and access appear lacking. This highlights the need for further scholarship aimed at developing the robust risk management strategies which are required to support high quality, sustainable provision of purchased services. 相似文献
43.
Using the Theory of Planned Behaviour to Understand Motivation to Register Births in Lombok,Indonesia 下载免费PDF全文
Anaise Williams Santi Kusumaningrum Cyril Bennouna Rahmadi Usman Wenny Wandasari Lindsay Stark 《Children & Society》2018,32(5):368-380
Despite government interest in promoting birth registration, more than a third of Indonesian children do not have a birth certificate, affecting the realisation of both their human and citizen rights. While barriers to registering children's births in Indonesia have been assessed, there is limited research on how communities perceive the importance of having a birth certificate. This study used focus group discussions to explore parental motivations around birth registration. The results of a thematic analysis found that perceived use of birth certificates, perceived control over the application process and social norms related to certificate ownership affect the intention to apply. 相似文献
44.
Christopher Tong 《The American statistician》2019,73(1):246-261
ABSTRACTScientific research of all kinds should be guided by statistical thinking: in the design and conduct of the study, in the disciplined exploration and enlightened display of the data, and to avoid statistical pitfalls in the interpretation of the results. However, formal, probability-based statistical inference should play no role in most scientific research, which is inherently exploratory, requiring flexible methods of analysis that inherently risk overfitting. The nature of exploratory work is that data are used to help guide model choice, and under these circumstances, uncertainty cannot be precisely quantified, because of the inevitable model selection bias that results. To be valid, statistical inference should be restricted to situations where the study design and analysis plan are specified prior to data collection. Exploratory data analysis provides the flexibility needed for most other situations, including statistical methods that are regularized, robust, or nonparametric. Of course, no individual statistical analysis should be considered sufficient to establish scientific validity: research requires many sets of data along many lines of evidence, with a watchfulness for systematic error. Replicating and predicting findings in new data and new settings is a stronger way of validating claims than blessing results from an isolated study with statistical inferences. 相似文献
45.
Catalina Canals Andrea Canals 《Journal of Statistical Computation and Simulation》2019,89(10):1887-1898
The central limit theorem indicates that when the sample size goes to infinite, the sampling distribution of means tends to follow a normal distribution; it is the basis for the most usual confidence interval and sample size formulas. This study analyzes what sample size is large enough to assume that the distribution of the estimator of a proportion follows a Normal distribution. Also, we propose the use of a correction factor in sample size formulas to ensure a confidence level even when the central limit theorem does not apply for these distributions. 相似文献
46.
47.
Sotirios Losidis 《随机性模型》2019,35(1):51-62
In a Poisson process, it is well-known that the forward and backward recurrence times at a given time point t are independent random variables. In a renewal process, although the joint distribution of these quantities is known (asymptotically), it seems that very few results regarding their covariance function exist. In the present paper, we study this covariance and, in particular, we state both necessary and sufficient conditions for it to be positive, zero or negative in terms of reliability classifications and the coefficient of variation of the underlying inter-renewal and the associated equilibrium distribution. Our results apply either for an ordinary renewal process in the steady state or for a stationary process. 相似文献
48.
The exponentially weighted moving average (EWMA) chart is often designed assuming the process parameters are known. In practice, the parameters are rarely known and need to be estimated from Phase I samples. Different Phase I samples are used when practitioners construct their own control chart's limits, which leads to the “Phase I between-practitioners” variability in the in-control average run length (ARL) of control charts. The standard deviation of the ARL (SDARL) is a good alternative to quantify this variability in control charts. Based on the SDARL metric, the performance of the EWMA median chart with estimated parameters is investigated in this paper. Some recommendations are given based on the SDARL metric. The results show that the EWMA median chart requires a much larger amount of Phase I data in order to reduce the variation in the in-control ARL up to a reasonable level. Due to the limitation of the amount of the Phase I data, the suggested EWMA median chart is designed with the bootstrap method which provides a good balance between the in-control and out-of-control ARL values. 相似文献
49.
The authors study the strong convergence for sequences of pairwise negatively quadrant dependent (NQD) random variables under some wide conditions, and present some new theorems on the complete convergence and the strong laws of large numbers. The obtained results extend and improve some theorems in existing literature. 相似文献
50.
This issue examines struggles over public discursive power in late modern society, understanding that late modern publics are characterized by a destabilization of formerly unmarked public authorities, in other words, an unsettling of standardized “voices from nowhere” (Gal & Woolard, 2001). The contributions to the issue illustrate traditional social and academic elites’ discursive reactions to such developments. In the introduction, we outline different theoretical frameworks of modern and late‐modern publics, identify factors that contribute to a destabilization of modern certainties of social public order, and argue that a weakening of traditional public norms not only implies emancipation but also, as the contributions to the issue demonstrate, may bring along new forms of public dominance. For the positioning of contemporary sociolinguistic theory and practice, we conclude that it is the crucial task of the current public moment to critically self‐engage with our own relations with, and ideologies of, the public. Dieses Themenheft befragt Strukturen öffentlicher Diskursmacht in spätmoderner Gesellschaft und zeigt auf, dass spätmoderne Öffentlichkeit durch eine Destabilisierung von vormals unmarkierten Autoritäten ist, in anderen Worten, von standardisierten “voices from nowhere” (Gal & Woolard, 2001). Die Beiträge illustrieren Reaktionen traditioneller sozialer und akademischer Eliten hierauf. In dieser Einleitung skizzieren wir verschiedene theoretische Zugänge zu moderner und spätmoderner Öffentlichkeit, identifizieren Faktoren, die zu einer Destabilisierung von sozialen Gewissheiten der Moderne beitragen und legen dar, dass eine Schwächung traditioneller öffentlichen Normen nicht nur soziale Emanzipation impliziert sondern, wie die Beiträge zu diesem Heft zeigen, auch neue Formen öffentlicher Dominanz hervorbringt. In Bezug auf zeitgenössische soziolinguistische Theorie und Praxis schlussfolgern wir daraus, dass es im aktuellen öffentlichen Kontext eine zentrale Aufgabe der Soziolinguistik ist, sich kritisch mit den eigenen Beziehungen zu und Ideologien von Öffentlichkeit befassen. Das Themenheft soll zu dieser Auseinandersetzung beitragen. 相似文献