全文获取类型
收费全文 | 18415篇 |
免费 | 301篇 |
国内免费 | 1篇 |
专业分类
管理学 | 2411篇 |
民族学 | 91篇 |
人口学 | 1530篇 |
丛书文集 | 81篇 |
教育普及 | 3篇 |
理论方法论 | 1591篇 |
综合类 | 180篇 |
社会学 | 9015篇 |
统计学 | 3815篇 |
出版年
2023年 | 96篇 |
2021年 | 107篇 |
2020年 | 239篇 |
2019年 | 367篇 |
2018年 | 407篇 |
2017年 | 587篇 |
2016年 | 417篇 |
2015年 | 297篇 |
2014年 | 435篇 |
2013年 | 3644篇 |
2012年 | 513篇 |
2011年 | 513篇 |
2010年 | 381篇 |
2009年 | 370篇 |
2008年 | 405篇 |
2007年 | 383篇 |
2006年 | 422篇 |
2005年 | 385篇 |
2004年 | 329篇 |
2003年 | 291篇 |
2002年 | 341篇 |
2001年 | 444篇 |
2000年 | 428篇 |
1999年 | 431篇 |
1998年 | 290篇 |
1997年 | 267篇 |
1996年 | 307篇 |
1995年 | 292篇 |
1994年 | 341篇 |
1993年 | 305篇 |
1992年 | 343篇 |
1991年 | 335篇 |
1990年 | 342篇 |
1989年 | 305篇 |
1988年 | 278篇 |
1987年 | 255篇 |
1986年 | 240篇 |
1985年 | 252篇 |
1984年 | 260篇 |
1983年 | 184篇 |
1982年 | 185篇 |
1981年 | 148篇 |
1980年 | 168篇 |
1979年 | 171篇 |
1978年 | 140篇 |
1977年 | 128篇 |
1976年 | 114篇 |
1975年 | 132篇 |
1974年 | 95篇 |
1973年 | 77篇 |
排序方式: 共有10000条查询结果,搜索用时 8 毫秒
411.
Price determinants as well as strategies can be studies by use of simulation, particularly if cost and price relationships can be related to market activity [1] [9] [11]. But, through the use of dynamic programming, given the market conditions, one can extend the analysis to include an optimal strategy. This paper describes a dynamic programming approach to studying price strategy. A model is developed to show that in a market characterized by cost/volume and price/volume relationships, profitability can be extended beyond that resulting from a dominant market strategy to an optimal maximizing strategy. Extension of the model is suggested for studying (a) sensitivity of a strategy (solution) to price level and cost changes, (b) optimal timing of withdrawal, and (c) present value analysis. 相似文献
412.
413.
Alternative decision rules for aggregate production scheduling are specified here under chance-constrained sales and compared with the HMMS model. These rules are evaluated for their performance on the basis of simulated data on sales and it is found that the linear decision rules of the HMMS model can be considerably improved. 相似文献
414.
Rakesh K. Sarin 《决策科学》1977,8(4):722-733
In this paper the results of an extensive simulation study are reported to provide empirical evidence on the Evaluation and Bound approach. Some rules for implementing the procedure interactively on a computer are also examined and compared experimentally. The results suggest that the Evaluation and Bound procedure, in conjunction with an appropriate strategy of implementing it, would reduce considerably the information requirement of the decision maker in the choice of a preferred multiattribute alternative. 相似文献
415.
416.
William B. Vessey Jamie D. Barrett Michael D. Mumford Genevieve Johnson Brett Litwiller 《The Leadership Quarterly》2014,25(4):672-691
In recent years there has been a marked increase in the study of the influence of leadership on creativity, and the effects of this relationship on organizational performance. While a number of explanations have been broached with regard to the positive effects of leadership on creativity, many of these studies propose different, and often contradictory, methods for leaders to achieve these positive effects on creativity within their organizations and work groups. Additionally, little work has been done examining the effects of leadership on highly creative people in fields requiring creativity. The purpose of this study is to examine two existing leadership theories with regard to their viability as models to explain creative performance of eminent scientists. Eminent scientists represent a population of leaders of highly creative individuals in a field that values the production of innovative ideas and products as a marker of performance. Ninety-three excerpts from the biographies of scientists were content coded for leader behaviors and performance criteria. The results of this analysis indicate that a model based on strategic planning and product championing may serve to explain the positive effects of leadership on creativity in a highly creative population. 相似文献
417.
İlknur Aykurt Karlıbel Seyhan Dülger Meliha Kasapoğlu Aksoy Muhammet Güzelsoy Ali Rıza Türkoğlu Lale Altan 《The aging male》2019,22(2):109-115
Objective: This study aims to investigate the effect of smoking on sexual functions in AS patients.Patients and methods: A total of 67 male AS patients with a median age of 34 years (range: 18–57) reporting sexual activity at least for the past 4 weeks period were included. Patients were divided into smokers (Group 1, n?=?47) and non-smokers (Group 2, n?=?20). Fagerström test for nicotine dependence, smoking history, exhaled carbon monoxide test were recorded for smoking AS patients. Visual analogue scale (VAS), Bath Ankylosing Spondylitis Disease Activity Index (BASDAI), Bath Ankylosing Spondylitis Metrology Index (BASMI), Bath Ankylosing Spondylitis Functional Index (BASFI), Ankylosing Spondylitis Quality of Life (ASQoL), International Index of Erectile Function (IIEF), Beck Depression Inventory (BDI) were filled for both groups.Results: There was no significant difference between smokers and non-smokers in all evaluation parameters. BASMI scores were significantly lower in the mild dependency subgroup as compared to those with moderate or severe dependency (p?=?.005 and p?=?.007, respectively). Total IIEF score and IIEF categories correlated significantly with BASDAI, BASFI, BASMI, ASQoL, pain, fatigue, and cumulative smoking. BDI showed an inverse correlation with the IIEF score and IIEF category (p?.001 r?=?–0.520, p?.001 r?=?–0.508, respectively).Conclusions: Sexual function in AS patients is associated with the pain, fatigue, disease activity, functional status, quality of life, depression as well as the cumulative exposure to smoking, and that sexual functions tend to decline with increasing degree of cigarette dependency. 相似文献
418.
Alexis Glennon Doyle K. Pruitt Rebecca S. Rouland Polmanteer 《Journal Of Human Behavior In The Social Environment》2019,29(1):48-56
ABSTRACTSelf-care is recognized as an important aspect of social work practice. Beginning in educational settings, developing social workers are encouraged to learn about and practice self-care. However, self-care is typically promoted through strategies and approaches outside of the practice context. Social workers are oftentimes encouraged to use individualized self-care plans, which often feature a variety of relaxation and secondary techniques; focus on self-awareness and self-reflection; and have proper use of supervision. Although these strategies are invaluable, they do little to directly benefit the social worker during direct practice or while in session with a client which is a time period when clinicians are particularly vulnerable to distress or burnout. The importance of real-time self-care strategies is particularly critical for clinicians, especially those who engage in trauma work, given the sensitivity of topics that clients may have endured or benefit from assistance in processing. Further, little information has been published on the use of self-care techniques during a session with a client or in a clinical context. The purpose of the present paper is to discuss self-care strategies that can be useful both outside of and within a clinical setting and present a model of such strategies that focus on integrating self-care in clinical practice particularly for those engaging in trauma work. The paper will conclude by discussing the relevancy of the developed model in practice. 相似文献
419.
AbstractWith a shift to more automation technology, social acceptance of technology plays an important role in the manufacturing sector. To what extent this occurs, and affects the adoption of technology, has been less researched, but is important in deciding how such technology is introduced, and the nature of the shift from labour-intensive manufacturing to automation. This research applies the revised technology acceptance model (TAM) to examine the impact of social and individual antecedents on the acceptance of automation manufacturing technology. Survey data are collected from 258 Chinese manufacturers. Results suggest that perceived norms significantly affect organizational intention to use automation manufacturing technology both directly and via perceived usefulness; organizational efficacy explains the intention to use via mediating effect of perceived usefulness and perceived ease of use. This research is one of the first extending and applying TAM from individuals to organizations. 相似文献
420.
Among a sample of emerging adult females (N = 152) we empirically examined the role of humility and forgiveness in romantic relationships. We specifically tested a model linking perceived humility to relationship satisfaction with self‐forgiveness and partner‐forgiveness. Participants in a romantic relationship completed measures of self‐reported humility, self‐forgiveness, partner‐forgiveness, and relationship satisfaction. Serial mediation analyses were conducted using path analysis to test the following sequence, humility self‐forgiveness partner‐forgiveness relationship satisfaction. Findings indicate that humility was related to relationship satisfaction via a serially mediated path of self‐forgiveness and partner‐forgiveness, which was not reducible to impression management. We consider implications for research and clinical practice. 相似文献