全文获取类型
收费全文 | 1385篇 |
免费 | 26篇 |
国内免费 | 14篇 |
专业分类
管理学 | 42篇 |
民族学 | 5篇 |
人口学 | 6篇 |
丛书文集 | 166篇 |
理论方法论 | 34篇 |
综合类 | 941篇 |
社会学 | 14篇 |
统计学 | 217篇 |
出版年
2024年 | 2篇 |
2023年 | 4篇 |
2022年 | 6篇 |
2021年 | 10篇 |
2020年 | 21篇 |
2019年 | 23篇 |
2018年 | 18篇 |
2017年 | 22篇 |
2016年 | 16篇 |
2015年 | 26篇 |
2014年 | 67篇 |
2013年 | 113篇 |
2012年 | 90篇 |
2011年 | 101篇 |
2010年 | 78篇 |
2009年 | 72篇 |
2008年 | 103篇 |
2007年 | 92篇 |
2006年 | 83篇 |
2005年 | 82篇 |
2004年 | 93篇 |
2003年 | 85篇 |
2002年 | 73篇 |
2001年 | 55篇 |
2000年 | 32篇 |
1999年 | 18篇 |
1998年 | 8篇 |
1997年 | 5篇 |
1996年 | 4篇 |
1995年 | 8篇 |
1994年 | 5篇 |
1993年 | 1篇 |
1992年 | 2篇 |
1991年 | 2篇 |
1990年 | 1篇 |
1989年 | 2篇 |
1988年 | 1篇 |
1980年 | 1篇 |
排序方式: 共有1425条查询结果,搜索用时 15 毫秒
81.
Association of the modified frailty index with adverse outcomes after penile prosthesis implantation
Objectives: To investigate frailty as a predictor of surgical outcome in elderly patients undergoing penile prosthesis implantation.Material and methods: A total of 54 elderly patients, above 60 years of age, underwent penile prosthesis implantation between 2012 and 2014. Their data were collected and retrospectively analyzed. A modified frailty index (mFI) was calculated for each patient based on 11 risk factors from the Canadian Study of Health and Aging Frailty Index. The 1-year adverse outcomes were correlated with mFI, patients’ and procedure’s risk factors.Results: Mean age was 64.9?±?5.2 years. No mortality was reported in our patients, however, one-year adverse outcomes were encountered in 43 (79.6%) patients. Among all studied variables, the 1-year adverse outcomes was not significantly association with mFI, but with preoperative glycosylated hemoglobin A1c (HbA1c) (p?=?0.031) and associated Peyronie’s disease (PD) (p?=?0.000). HbA1c, dyslipidemia, hypertension, PD and duration of the procedure were predictive of infection complications (p?0.05). Only PD and HbA1c sustained an independent significant impact.Conclusions: mFI is not a predictive of post-penile prosthesis implantation adverse outcomes in elderly patients with impotence. Degree of diabetic control and association with PD was associated with the 1-year adverse outcomes and infection complications. 相似文献
82.
根据2006年全国综合调查(CGSS2006)的数据,本文探讨了夫妻权利运行的三个要素:权力基础(教育差、年收入差);权利过程(互诉烦恼、对钱不同意见频率);权利结果(家务差、家庭事务决定权)对婚姻满意度的具体影响。多元回归分析表明:权利过程是影响婚姻满意度最重要的环节,其中配偶向被访者诉说烦恼和对钱不同意见频率都有显著影响:教育差虽也有一定的负向显著度,但其影响程度较小;夫妻年收入差、家务差和家庭事务决定权并无显著性。 相似文献
83.
我国警察文化是社会主流文化与警察职业生活过程各种要素相互影响并长期积淀的结果,它有不同于社会其他亚文化的伦理诉求。能使警察将此伦理诉求转化为现实职业行为的精神力量,便是警察的责任意识。在警察文化的发展过程中,警察责任意识与警察文化的职业价值观核心问题、警察制度文化,以及警察文学艺术的创作与演绎相互作用、相互影响,从而推动警察文化进一步发展。 相似文献
84.
军机备件需求量修正的粗糙集方法 总被引:2,自引:0,他引:2
本文针对不可量化因素对军机备件需求量的影响,提出了基于粗糙集的备件需求量的修正方法。考虑不可量化因素存在多值性的问题,将不可分辨关系下的经典粗糙集方法拓展成相容关系下的扩展粗糙集方法,通过相容关系下的近似空间获取决策规则,再由决策规则得到修正系数。最后以轮胎类器材为例,说明了修正系数的获取过程。 相似文献
85.
This paper proposes an optimization model and shows that most inverse combinatorial optimization problems so far discussed can be fit into this model as special cases. We propose a Newton-type algorithm for this model under l
norm. This algorithm can solve the model in strongly polynomial time if the subproblem involved is solvable in strongly polynomial time for any fixed value of the parameter appearing in the subproblem, and it is shown that most particular inverse optimization problems encountered are this kind. Therefore, through this paper we show that a large group of inverse optimization problems can be handled in a uniform way and solved in strongly polynomial time. 相似文献
86.
The Media and Genetically Modified Foods: Evidence in Support of Social Amplification of Risk 总被引:4,自引:0,他引:4
Empirical examinations of the "social amplification of risk" framework are rare, partly because of the difficulties in predicting when conditions likely to result in amplification effects will occur. This means that it is difficult to examine changes in risk perception that are contemporaneous with increases and/or decreases in social or media discussion of the risks associated with a particular risk event. However, the collection of attitude data before, during, and after the increased reporting of the risks of genetically modified food in the United Kingdom (spring 1999) has demonstrated that people's risk perceptions do increase and decrease in line with what might be expected upon examination of the amplification and attenuation mechanisms integral to the framework. Perceptions of benefit, however, appeared to be permanently depressed by negative reporting about genetically modified food. Trust in regulatory institutions with responsibility for protecting the public was not affected. It was concluded that the social amplification of risk framework is a useful framework for beginning to explain the potential impact on risk perceptions of a risk event, particularly if that risk event is presented to the public as a new hazard occurring in a crisis context. 相似文献
87.
诉讼证据概念和特征一直以来都是证据法学界争议较多的问题之一。传统证据概念中的“事实说”以及刑诉法修正案草案中的“材料说”都值得商榷;传统诉讼证据特征中的客观性、关联性、合法性并非诉讼证据之特征,而是诉讼证据成为定案根据的要件或标准。在概念上,诉讼证据应定义为刑事诉讼控辩双方、民事和行政诉讼原被告双方当事人在诉讼过程中用以证明自己诉讼主张的根据;由此,诉讼证据的基本特征应采四性说,即诉讼证明性、诉讼当事人性、案件信息承载性和诉讼时效性。 相似文献
88.
《Journal of Statistical Computation and Simulation》2012,82(10):1869-1890
ABSTRACTWe consider the use of modern likelihood asymptotics in the construction of confidence intervals for the parameter which determines the skewness of the distribution of the maximum/minimum of an exchangeable bivariate normal random vector. Simulation studies were conducted to investigate the accuracy of the proposed methods and to compare them to available alternatives. Accuracy is evaluated in terms of both coverage probability and expected length of the interval. We furthermore illustrate the suitability of our proposals by means of two data sets, consisting of, respectively, measurements taken on the brains of 10 mono-zygotic twins and measurements of mineral content of bones in the dominant and non-dominant arms for 25 elderly women. 相似文献
89.
《Journal of Statistical Computation and Simulation》2012,82(2):155-164
The sampling distribution of kendall's partial rank correlation coefficient, Jxy?z, is not known for N>4, where N is the number of subjectts. Moran (1951) used a direcr conbinatorial method to obtain the distribution of Jxy?z forN=4; however, ten minor computationa; errors in his Table 2apparently resulted in how erroneous entries for his frequency table. Since the parctial limits of the direct combinatorial approach have been reached once N>4, the first main objective of this paper was to obtain the exact distribution of Jxy?z for N=f, 6, and 7 using an electronic computer. The second was to use the Monte Carlo method to obtain reliable estimates of the quantiles of Jxy?z for N=8,9,...,30 相似文献
90.