全文获取类型
收费全文 | 544篇 |
免费 | 26篇 |
国内免费 | 6篇 |
专业分类
管理学 | 37篇 |
劳动科学 | 1篇 |
民族学 | 5篇 |
人口学 | 6篇 |
丛书文集 | 90篇 |
理论方法论 | 13篇 |
综合类 | 384篇 |
社会学 | 16篇 |
统计学 | 24篇 |
出版年
2023年 | 8篇 |
2022年 | 15篇 |
2021年 | 21篇 |
2020年 | 12篇 |
2019年 | 8篇 |
2018年 | 15篇 |
2017年 | 13篇 |
2016年 | 20篇 |
2015年 | 26篇 |
2014年 | 27篇 |
2013年 | 36篇 |
2012年 | 33篇 |
2011年 | 49篇 |
2010年 | 35篇 |
2009年 | 35篇 |
2008年 | 31篇 |
2007年 | 46篇 |
2006年 | 34篇 |
2005年 | 19篇 |
2004年 | 14篇 |
2003年 | 18篇 |
2002年 | 7篇 |
2001年 | 13篇 |
2000年 | 7篇 |
1999年 | 8篇 |
1998年 | 3篇 |
1997年 | 3篇 |
1996年 | 7篇 |
1995年 | 2篇 |
1994年 | 1篇 |
1993年 | 2篇 |
1992年 | 3篇 |
1991年 | 2篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1982年 | 1篇 |
排序方式: 共有576条查询结果,搜索用时 15 毫秒
71.
中国是诗的国度,在数千年的文明史中,一代代的文人雅士,创造了无数脍炙人口的诗词歌赋(本文统称为诗)。通过对千余篇古诗词的搜索,筛选出有关昆虫的诗句,从形态结构、生活习性、对人类的影响三个方面进行了分类归纳。 相似文献
72.
Journal of Population Research - A neoliberal immigration regime often takes an “economic” lens to frame and reframe immigration regulation based on a rational cost–benefit... 相似文献
73.
自从1991年中国与东盟建立对话关系以来,中国与东盟经贸合作快速发展,这得益于双方不断创新。组建自由贸易区、举办中国—东盟博览会等均是中国和东盟经贸合作的重大创新举措。尤其是双方积极合作,把新机制、新举措落在了实处,并使之转化成了实实在在的经济利益,惠及中国和东盟各国,乃至整个东亚地区。在今后双方关系发展的新阶段,我们应继续坚持创新,积极增强合作活力。作者建议:双方政府间应继续坚持平等互利、协商一致的原则,应充分发挥非政府组织的作用,企业间合作应以创新为本。坚持开拓创新,中国与东盟经贸合作的发展必将带来“双赢”的局面。 相似文献
74.
Khalid Khan Chi‐Wei Su Ran Tao Lin Yang 《International migration (Geneva, Switzerland)》2019,57(5):105-120
This article evaluates the association between remittance outflow (RMO) and economic growth in the Gulf Cooperation Council (GCC) countries. The results of this evaluation indicate that RMO Granger creates gross domestic product (GDP) per capita in three countries, namely, Bahrain, Oman and Saudi Arabia. Similarly, the results for causality from GDP per capita to RMO are significant for four countries, namely, Bahrain, Kuwait, Qatar, and Saudi Arabia. The findings differ from those of the household consumption model, stating that higher RMO will decrease economic activity. GDP per capita is the main determinant of RMO, suggesting that economic growth promises and encourages continuous RMO and vice versa. The adverse impact of RMO can be minimized by encouraging the local population to be productive in the private sector, as local productivity will reduce the huge influx of foreign workers and provide valuable local investment opportunities to lessen the amount being remitted. 相似文献
75.
76.
Yingli Ran Zhao Zhang Ker-I Ko Jun Liang 《Journal of Combinatorial Optimization》2016,31(4):1505-1517
This paper studies approximation algorithm for the maximum weight budgeted connected set cover (MWBCSC) problem. Given an element set \(X\), a collection of sets \({\mathcal {S}}\subseteq 2^X\), a weight function \(w\) on \(X\), a cost function \(c\) on \({\mathcal {S}}\), a connected graph \(G_{\mathcal {S}}\) (called communication graph) on vertex set \({\mathcal {S}}\), and a budget \(L\), the MWBCSC problem is to select a subcollection \({\mathcal {S'}}\subseteq {\mathcal {S}}\) such that the cost \(c({\mathcal {S'}})=\sum _{S\in {\mathcal {S'}}}c(S)\le L\), the subgraph of \(G_{\mathcal {S}}\) induced by \({\mathcal {S'}}\) is connected, and the total weight of elements covered by \({\mathcal {S'}}\) (that is \(\sum _{x\in \bigcup _{S\in {\mathcal {S'}}}S}w(x)\)) is maximized. We present a polynomial time algorithm for this problem with a natural communication graph that has performance ratio \(O((\delta +1)\log n)\), where \(\delta \) is the maximum degree of graph \(G_{\mathcal {S}}\) and \(n\) is the number of sets in \({\mathcal {S}}\). In particular, if every set has cost at most \(L/2\), the performance ratio can be improved to \(O(\log n)\). 相似文献
77.
张然 《电子科技大学学报(社会科学版)》2018,20(4):68-72
副词“一定”在现代汉语中的用例十分普遍,使用范围非常广,从历时角度理清其形成过程,对我们掌握其用法有积极意义。“一定”在唐代以前尚是一个松散的非词短语,表示“一经确定/制定”的意思,表示“必然”之义的副词用法,萌芽于唐末五代,形成于宋元,在明清之际,经过在通俗文学作品中的大量使用进而成熟,最终固化。“一定”由短语演变为副词的词汇化、语法化过程可以说是一个短语特性不断弱化以至最终消失的过程,在这个过程中,“一定”的词汇性特征不断加强,最终固化。 相似文献
78.
P2P网贷是我国互联网金融的重要组成部分,数年来发展迅猛,但是各平台公司良莠不齐,有的给投资人带来了损失,也造成了不良的社会影响。近年来,我国在政策和法律上不断加强对P2P网贷的监管。2016年8月底,银监会、工信部、公安部、国信办制定了《网络借贷信息中介机构业务活动管理暂行办法》规范网贷平台业务活动,促进网络借贷行业健康发展。P2P平台公司无论从自身存亡还是行业发展角度都要做好自律,提高风险意识,重视防范。笔者分析研究了大量P2P网贷行业违法案例,并结合其金融法治从业经验,首先介绍P2P网贷平台的经营模式,重点分析P2P网贷公司的风险和防范,最后指出机遇与挑战。 相似文献
79.
Potenza MN Steinberg MA Wu R Rounsaville BJ O'malley SS 《Journal of gambling studies / co-sponsored by the National Council on Problem Gambling and Institute for the Study of Gambling and Commercial Gaming》2006,22(2):241-254
Background Few investigations have characterized groups of older adults with gambling problems, and published reports are currently limited by small samples of older adult problem gamblers. Gambling helplines represent a widespread mechanism for assisting problem gamblers to move into treatment settings. Given data from older adult problem gamblers in treatment, we hypothesized that older as compared with younger adult problem gamblers calling a gambling helpline would be less likely to report gambling-related problems.Design and methods Logistic regression analyses were performed on data obtained from January 1, 2000 to December 31, 2001, inclusive, from callers with gambling problems (N = 1,084) contacting the Connecticut Council on Problem Gambling Helpline.Results Of the 1,018 phone calls used in the logistic regression analyses, 168 (16.5%) were from older adults and 850 (83.5%) from younger adults. Age-related differences were observed in demographic features, types and patterns of gambling reported as problematic, gambling-related problems and psychiatric symptoms, substance use problems, patterns of indebtedness, and family histories of addictive disorders. Older as compared with younger adult problem gamblers were more likely to report having lower incomes, longer durations of gambling, fewer types of problematic gambling, and problems with casino slot machine gambling and less likely to report gambling-related anxiety, family problems, illegal behaviors and arrests, drug problems, indebtedness to bookies or acquaintances, family histories of drug abuse, and problems with casino table gambling.Conclusions Older as compared with younger adult problem gamblers calling a gambling helpline differ on many clinically relevant features. The findings suggest the need for improved and unique prevention and treatment strategies for older adults with gambling problems. 相似文献
80.
通过考察,发现川滇毗邻藏区传统习惯法并未随着社会经济的变迁而淡化,相反对国家法的执行依然发挥着不容忽视的影响力。由此可以看出,习惯法将以其特有的方式长期存在,并与国家法形成长期的互动,理性看待现阶段国家法在民族乡村的有限性并注意引入民间习惯法的一些好的做法,使民间习惯法与国家法进行相互塑造与互动,以达到法律效果与社会效果的有机统一将是国家法在民族地区乡村取得成功的关键。 相似文献