全文获取类型
收费全文 | 1521篇 |
免费 | 55篇 |
专业分类
管理学 | 204篇 |
民族学 | 20篇 |
人口学 | 132篇 |
丛书文集 | 12篇 |
理论方法论 | 136篇 |
现状及发展 | 1篇 |
综合类 | 12篇 |
社会学 | 848篇 |
统计学 | 211篇 |
出版年
2023年 | 12篇 |
2022年 | 8篇 |
2021年 | 20篇 |
2020年 | 34篇 |
2019年 | 40篇 |
2018年 | 54篇 |
2017年 | 54篇 |
2016年 | 47篇 |
2015年 | 39篇 |
2014年 | 40篇 |
2013年 | 299篇 |
2012年 | 56篇 |
2011年 | 65篇 |
2010年 | 41篇 |
2009年 | 39篇 |
2008年 | 62篇 |
2007年 | 40篇 |
2006年 | 41篇 |
2005年 | 35篇 |
2004年 | 31篇 |
2003年 | 29篇 |
2002年 | 41篇 |
2001年 | 32篇 |
2000年 | 28篇 |
1999年 | 25篇 |
1998年 | 20篇 |
1997年 | 12篇 |
1996年 | 21篇 |
1995年 | 24篇 |
1994年 | 19篇 |
1993年 | 10篇 |
1992年 | 12篇 |
1991年 | 18篇 |
1990年 | 19篇 |
1989年 | 14篇 |
1988年 | 11篇 |
1987年 | 12篇 |
1986年 | 8篇 |
1985年 | 19篇 |
1984年 | 11篇 |
1983年 | 14篇 |
1982年 | 16篇 |
1981年 | 14篇 |
1980年 | 12篇 |
1979年 | 12篇 |
1978年 | 9篇 |
1976年 | 11篇 |
1975年 | 9篇 |
1974年 | 6篇 |
1972年 | 5篇 |
排序方式: 共有1576条查询结果,搜索用时 15 毫秒
951.
Asian Americans are the most highly educated racial group in the United States and are commonly heralded as the model minority for their high academic success. Nevertheless, previous research suggests that Asian Americans may face certain disadvantages in school settings. For example, Asian Americans’ academic advantage over non-Hispanic white students diminishes between kindergarten entry and the next several years of schooling. This study provides a closer examination of the educational progress of Asian American students compared to white students through a seasonal comparison approach. Using the Northwest Evaluation Association, we analyze reading and math scores for over 130,000 Asian American and white students in grades K-7 in approximately 675 public schools across the US. We find that Asian Americans have higher academic achievement than white students in general, but that these advantages are maintained primarily through faster rates of learning during the summer months. When school is in session, the Asian advantage either remains unchanged or shrinks, consistent with the view that some school processes undermine the educational progress of Asian American students relative to white students. 相似文献
952.
This paper examines the impact of a rolling-schedule implementation on the performance of three of the better known lot-sizing methods for single-level assembly systems——Part-Period-Cost-Balancing, Silver-Meal, and Wagner-Whitin algorithms—and a modified version of the Silver-Meal procedure. The main finding is that under certain conditions the computationally simpler Silver-Meal heuristic can provide cost performance superior to that of the Wagner-Whitin algorithm. 相似文献
953.
Joseph R. Biggs 《决策科学》1979,10(1):96-115
Material Requirements Planning (MRP) is currently being applied and used extensively in industry and is being proclaimed as the solution to many of the problems of traditional production-inventory control problems. While the latter may be true, MRP is not without its own problems, two of which are the decisions concerning the appropriate lotsizing and sequencing rules to use in order to improve system performance. This paper describes a computer simulation study which was conducted to determine the effects of using various sequencing and lot-sizing rules on various performance criteria in a multistage, multiproduct, production-inventory system using MRP. The results of the study indicate that the application of various rules causes changes in system performance and that an interaction effect exists between lot-sizing and sequencing rules. What is more important is that a set of guidelines is developed to enable the practitioner to choose a lot-sizing rule and a sequencing rule that will tend to improve the performance of his system for the various performance criteria. 相似文献
954.
955.
Review of Economics of the Household - This paper investigates the impact of fertility on women’s entrepreneurship decision in Nigeria, using the 2008 and 2013 cross-sectional Demographic... 相似文献
956.
Joseph Amankwah-Amoah Xu Chen Xiaojun Wang Zaheer Khan Jing Chen 《Long Range Planning》2019,52(4):101871
The paper examines how firms develop supply chain financing model to help overcome institutional voids (IVs) and become ambidextrous. This study presents a case analysis of a novel supply chain financing model instigated and implemented by China's Sichuan Telecom (ST) to help supply chain partners overcome IVs in their environments. We identified three unique stages in the evolution of the supply chain ambidextrous financing model: drivers for change (including identifying suppliers' problems and constraints), designing and implementing the supply chain ambidextrous financing model, and the tripartite performance effects. The analysis demonstrated how ST utilized its market power, resources and network ties to harness expertise and competences of small and medium-sized enterprises (SMEs) to overcome IVs and become ambidextrous. Sichuan Telecom aided the SMEs in solving the financing problem through order-based supply chain financing. Based on the analysis, we outline implications of this case for theory and policy. 相似文献
957.
Andrew M. Earle Lucy E. Napper Joseph W. LaBrie Ashley Brooks-Russell Daniel J. Smith 《Journal of American college health : J of ACH》2020,68(4):374-380
AbstractObjective: As marijuana use becomes more available to college students through increasing legal reform, this paper seeks to examine intentions for driving under the influence of cannabis (DUIC) and riding with a high driver (RWHD) through the lens of the theory of planned behavior (TPB) and assess potential interactions between personal attitudes, subjective norms, perceived behavioral control (PBC), and sex. Participants: Undergraduate college students (N?=?311) completed online surveys in September, 2013. Method: Participants self-reported their attitudes toward DUIC, subjective norms, PBC, past DUIC and RWHD, and intentions to DUIC and RWHD. Results: Participants’ attitudes toward DUIC, subjective norms, and PBC were strongly associated with intentions to DUIC and RWHD bivariately. In regression models, attitudes and PBC were both positively and significantly related to intentions to DUIC and RWHD. Conclusions: DUIC and RWHD are concerns for college populations. Targeting personal attitudes and perceived behavioral control via interventions may reduce these behaviors. 相似文献
958.
959.
960.
Social Indicators Research - Living in poverty may have long-run negative effects. The interaction between families and public policies is crucial as it affects a child’s opportunities. The... 相似文献