全文获取类型
收费全文 | 2167篇 |
免费 | 30篇 |
专业分类
管理学 | 295篇 |
民族学 | 8篇 |
人口学 | 197篇 |
丛书文集 | 9篇 |
理论方法论 | 217篇 |
综合类 | 53篇 |
社会学 | 915篇 |
统计学 | 503篇 |
出版年
2023年 | 13篇 |
2021年 | 18篇 |
2020年 | 24篇 |
2019年 | 54篇 |
2018年 | 58篇 |
2017年 | 73篇 |
2016年 | 45篇 |
2015年 | 50篇 |
2014年 | 58篇 |
2013年 | 400篇 |
2012年 | 82篇 |
2011年 | 70篇 |
2010年 | 48篇 |
2009年 | 58篇 |
2008年 | 41篇 |
2007年 | 46篇 |
2006年 | 53篇 |
2005年 | 31篇 |
2004年 | 33篇 |
2003年 | 35篇 |
2002年 | 29篇 |
2001年 | 47篇 |
2000年 | 51篇 |
1999年 | 60篇 |
1998年 | 46篇 |
1997年 | 35篇 |
1996年 | 25篇 |
1995年 | 37篇 |
1994年 | 37篇 |
1993年 | 31篇 |
1992年 | 33篇 |
1991年 | 30篇 |
1990年 | 31篇 |
1989年 | 20篇 |
1988年 | 26篇 |
1987年 | 35篇 |
1986年 | 25篇 |
1985年 | 29篇 |
1984年 | 35篇 |
1983年 | 23篇 |
1982年 | 24篇 |
1981年 | 19篇 |
1980年 | 19篇 |
1979年 | 16篇 |
1978年 | 17篇 |
1977年 | 16篇 |
1976年 | 15篇 |
1975年 | 12篇 |
1974年 | 12篇 |
1973年 | 13篇 |
排序方式: 共有2197条查询结果,搜索用时 15 毫秒
71.
The global factory literature suggests that MNCs can take advantage of global operations by extensively offshoring and outsourcing activities. However, the added difficulty for the lead firm to coordinate the resulting complex structure is often underestimated. Evidence could be found in Boeing's 787 Dreamliner project, in which the external complexity disrupted MNC performance. Motivated by the gap between theory and practice, this study focuses on systems of MNCs connected with each other with supplier-client relationships and/or outsourcing. In particular it investigates the interplay of the internal and external complexity in such systems and how their balance affects the system performance. The study models the internal and external complexity by using the NKC-simulation methodology and adjusting it to the specific MNC context. The NKC methodology is widely used in organization theory to study complex systems. Simulations comparing the performance of MNCs that use outsourcing to different degrees indicate that a balanced level of internal and external complexity is beneficial in the context of global factory. 相似文献
72.
D. V. Gribanov D. S. Malyshev P. M. Pardalos S. I. Veselov 《Journal of Combinatorial Optimization》2018,36(4):1128-1144
This paper studies a new version of the location problem called the mixed center location problem. Let P be a set of n points in the plane. We first consider the mixed 2-center problem, where one of the centers must be in P, and we solve it in \(O(n^2\log n)\) time. Second, we consider the mixed k-center problem, where m of the centers are in P, and we solve it in \(O(n^{m+O(\sqrt{k-m})})\) time. Motivated by two practical constraints, we propose two variations of the problem. Third, we present a 2-approximation algorithm and three heuristics solving the mixed k-center problem (\(k>2\)). 相似文献
73.
Alisson F. Barbieri Edson Domingues Bernardo L. Queiroz Ricardo M. Ruiz José I. Rigotti José A. M. Carvalho Marco F. Resende 《Population and environment》2010,31(5):344-370
This research contributes to an understanding of the relationship between climate change, economic impacts and migration.
We model the long-term relationship (up to 45 years of projection) between demographic dynamics—particularly migration—driven
by changes in the performance of the economy due to climate changes in the Northeast region of Brazil. The region is of particular
relevance to the study of climate change impacts given its large human population (28% of Brazil’s population) and high levels
of impoverishment, having an extensive semi-dry area which will be severely impacted by growing temperatures. Ultimately,
the integrated model generates state- and municipal-level migration scenarios based on climate change impacts on the primary
economic sectors and their articulations with other sectors. Results suggest that the predicted climate changes will impact
severely the agriculture sector in the region, acting as a potential migration push factor to other regions in the country.
Finally, we discuss how the increased vulnerability of some groups, particularly migrants, can be factored into Brazilian
public policy and planning. 相似文献
74.
This paper examines how full-time or part-time status affects students’ level of satisfaction with their degree programs.
For our analysis, we obtained data from a survey of graduate students. The survey was conducted at a public university in
Spain from 2001 to 2004. The decision to undertake paid employment while studying emerges as one of the key determinants of
student satisfaction. In particular, our findings indicate that students who hold a part-time job while studying are more
likely to express less satisfaction with their college experience. 相似文献
75.
The purpose of this paper is twofold: (1) to identify and compare the crisis communication strategies (CCSs) that organizations used to respond to a congenetic melamine-tainted milk crisis in two Chinese societies (i.e., Mainland China and Taiwan), and (2) to explore the underlying political and media system reasons that led to the differences. Content analysis and discourse analysis of media coverage were used. The most significant finding is that Sanlu (a Mainland China-based organization) and KingCar (a Taiwan-based organization) demonstrated inverse pattern of the CCS adoption. Specifically, according to Coombs’ (1998) defense-accommodation continuum, Sanlu's CCSs moved from defensive to accommodative pole as time went by whereas, in contrast, KingCar started with accommodative strategies and moved towards the defensive pole gradually. Besides, the results showed that both organizations adopted denial, corrective action and apology strategies. However, on the Sanlu part, the most frequently used strategy was denial, while KingCar used justification most often. Moreover, this paper suggests that besides cultural dynamics, political and media systems also play a part in corporate selection of CCSs, and they are among the most important factors that should be taken into account to explain the differences in societies even with an identical traditional culture. 相似文献
76.
Under the framework of media system dependency theory, this study investigates and compares traditional media dependency and Internet dependency in public health crisis situations in the context of Mainland China. 373 college students participated in the survey. Empirical data demonstrated that, during public health crises: (1) traditional media and the Internet play different roles for individuals; (2) higher level of threat perception leads to more intense Internet dependency, but does not do the same to traditional media dependency; (3) individuals’ Internet dependency intensity is higher than their traditional media dependency intensity; and (4) the Internet may influence the behavior of young Chinese more directly. 相似文献
77.
Amber A. Remble Maria I. Marshall Roman Keeney 《Journal of Family and Economic Issues》2014,35(3):411-422
This study focused on the lifecycle income objective of business-owning (farm and nonfarm) households. We hypothesized that the complex relationship between household and business management decisions had the potential to challenge predictions from standard household savings theory. Specifically, we tested for differences in saving behavior of these entrepreneurial households relative to the average US household. A limited dependent variable model was performed, keying in on the saving behavior and ability of household respondents in the Survey of Consumer Finances for 2007. The estimation results indicated that, along with standard demographic influences of savings models, households owning a farm or nonfarm business had a significantly higher likelihood of maintaining private saving in a given year. Our results highlight the necessity for future research on household saving behavior to account for the differing objectives and choice sets faced by households that own businesses when conducting analyses of household saving. 相似文献
78.
Kristy Parkinson Joseph Price Kosali I. Simon Sharon Tennyson 《Review of Economics of the Household》2014,12(4):771-790
We examine how use of antidepressant medications is influenced by Food and Drug Administration (FDA) warnings about the increased risk of suicidality associated with pediatric antidepressant use. With individual-level data on antidepressant use from the Medical Expenditure Panel Survey, we consider whether consumer responses to FDA warnings differ among targeted (children) and non-targeted (adult) age-groups. Because the warning labels specifically mentioned new users, we examine separately the effects of the warnings on initiations of antidepressant therapy and on continued use of antidepressants. We find evidence consistent with reduced initiation of antidepressant use among the intended population of children, and that usage among children with more highly educated parents responded earlier to FDA information. However, we also find spillover effects of reduced initiation among the non-targeted population of adults. Overall, our results indicate that the FDA warning may have led consumers to perceive risks beyond those specifically mentioned. 相似文献
79.
Ana I. Moro-Egido 《Journal of Family and Economic Issues》2012,33(1):11-23
This paper explores how mothers’ allocation of types of time with children and the determinants of this allocation have changed
during 1981–1997 in the United States, using Time Use Longitudinal Panel Study and Family Interaction, Social Capital and
Trends in Time Use. Data reveal that active time with children has increased for the case of educated working mothers with young children. Estimations also provide evidence
that although different uses of time are substitutes; active time is less sensitive than passive. Moreover, the relationship between active and passive time with children has changed over time. 相似文献
80.
J. M. G. Salmerón G. Aparicio L. G. Casado I. García E. M. T. Hendrix B. G.-Tóth 《Journal of Combinatorial Optimization》2017,33(2):389-402
In several areas like global optimization using branch-and-bound methods for mixture design, the unit n-simplex is refined by longest edge bisection (LEB). This process provides a binary search tree. For \(n>2\), simplices appearing during the refinement process can have more than one longest edge (LE). The size of the resulting binary tree depends on the specific sequence of bisected longest edges. The questions are how to calculate the size of one of the smallest binary trees generated by LEB and how to find the corresponding sequence of LEs to bisect, which can be represented by a set of LE indices. Algorithms answering these questions are presented here. We focus on sets of LE indices that are repeated at a level of the binary tree. A set of LEs was presented in Aparicio et al. (Informatica 26(1):17–32, 2015), for \(n=3\). An additional question is whether this set is the best one under the so-called \(m_k\)-valid condition. 相似文献