全文获取类型
收费全文 | 1322篇 |
免费 | 27篇 |
专业分类
各国政治 | 98篇 |
工人农民 | 105篇 |
世界政治 | 112篇 |
外交国际关系 | 73篇 |
法律 | 555篇 |
中国政治 | 12篇 |
政治理论 | 388篇 |
综合类 | 6篇 |
出版年
2023年 | 7篇 |
2021年 | 7篇 |
2020年 | 14篇 |
2019年 | 33篇 |
2018年 | 32篇 |
2017年 | 30篇 |
2016年 | 36篇 |
2015年 | 30篇 |
2014年 | 37篇 |
2013年 | 231篇 |
2012年 | 26篇 |
2011年 | 39篇 |
2010年 | 30篇 |
2009年 | 38篇 |
2008年 | 47篇 |
2007年 | 39篇 |
2006年 | 39篇 |
2005年 | 33篇 |
2004年 | 48篇 |
2003年 | 40篇 |
2002年 | 37篇 |
2001年 | 40篇 |
2000年 | 29篇 |
1999年 | 20篇 |
1998年 | 25篇 |
1997年 | 23篇 |
1996年 | 24篇 |
1995年 | 19篇 |
1994年 | 17篇 |
1993年 | 20篇 |
1992年 | 17篇 |
1991年 | 14篇 |
1990年 | 16篇 |
1989年 | 22篇 |
1988年 | 17篇 |
1987年 | 18篇 |
1986年 | 17篇 |
1985年 | 17篇 |
1984年 | 14篇 |
1983年 | 12篇 |
1982年 | 12篇 |
1981年 | 8篇 |
1980年 | 6篇 |
1979年 | 5篇 |
1978年 | 10篇 |
1977年 | 12篇 |
1976年 | 5篇 |
1975年 | 6篇 |
1974年 | 5篇 |
1973年 | 5篇 |
排序方式: 共有1349条查询结果,搜索用时 0 毫秒
981.
OBJECTIVE: This study considers three hypotheses regarding the impact of extended involuntary outpatient commitment orders on services utilization. METHOD: Service utilization of Victorian Psychiatric Case Register (VPCR) patients with extended (> or =180 day) outpatient commitment orders was compared to that of a diagnostically-matched treatment compliant group with similarly extended (> or =180 day) periods of outpatient care (N=1182)--the former receiving care during their extended episode on an involuntary basis while the latter participated in care voluntarily. Pre/post first extended episode mental health service utilization was compared via paired t tests with individuals as their own controls. Logistic and OLS regression as well as repeated measures ANOVA via the GLM SPSS program and post hoc t tests were used to evaluate between group and across time differences. RESULTS: Extended episodes of care for both groups were associated with subsequent reduced use of hospitalization and increases in community treatment days. Extended orders did not promote voluntary participation in the period following their termination. Community treatment days during the extended episode for those on orders were raised to the level experienced by the treatment compliant comparison group during their extended episode and maintained at that level via subsequent renewal of orders throughout the patients' careers. Approximately six community treatment days were required for those on orders to achieve a one-day reduction in hospital utilization following the extended episode. CONCLUSION: Outpatient commitment for those on extended orders in the Victorian context enabled a level of community-based treatment provision unexpected in the absence of this delivery system and provided an alternative to hospitalization. 相似文献
982.
983.
Olney CA Livingston JE Fisch S Talamantes MA 《Journal of prevention & intervention in the community》2006,32(1-2):133-147
Medical educators have begun to embrace service-learning as a method for teaching medical students to be more socially responsible, patient-oriented practitioners. However, research documenting the learning outcomes of service-learning in medical education is limited. In this paper, written documents generated through evaluation of a mandatory, structured community service-learning experience were analyzed qualitatively to discover the diverse learning outcomes among 24 students who participated in the experience. Preliminary findings indicate that students developed skills and attitudes directly related to competencies of concern in most U.S. medical programs. These preliminary findings may help other programs articulate learning outcomes for their service-learning programs. Further, these preliminary findings may stimulate more systematic research (qualitative and quantitative) in this area. 相似文献
984.
Martin B. Meznar Julius H. Johnson Philip J. Mizzi 《Journal of Public Affairs (14723891)》2006,6(1):58-68
- Being in the public eye puts pressure on an organization's Public Affairs (PA) function. This study finds that firms more closely covered by the press tend to be more forceful in promoting their own position on social issues (social buffering). Press coverage is not associated with greater corporate efforts to comply with societal expectation (social bridging). Overall, press coverage is weakly associated with lowered perceived corporate public affairs performance.
985.
986.
Analysts and researchers typically value knowledge for its contributions to the wisdom of policy action. Policymakers, however, typically value knowledge for its contributions to the exercise of political control. Our research on flows of knowledge among federal, state, and local education agencies documents how knowledge may increase the effectiveness of various control strategies. In these cases, knowledge is not intended to enhance rationality; it may or may not. It is intended to enhance control, and it does. Knowledge for control is particularly useful to policymakers who seek to intervene in policy arenas characterized by fragmented authority and widely dispersed resources. 相似文献
987.
988.
989.
990.
The separation of 12 explosives by capillary electrophoresis was optimized with the aid of artificial neural networks (ANNs). The selectivity of the separation was manipulated by varying the concentration of sodium dodecyl sulfate (SDS) and the pH of the electrolyte, while maintaining the buffer concentration at 10 mM borate. The concentration of SDS and the electrolyte pH were used as input variables and the mobility of the explosives were used as output variables for the ANN. In total, eight experiments were performed based on a factorial design to train a variety of artificial neural network architectures. A further three experiments were required to train ANN architectures to adequately model the experimental space. A product resolution response surface was constructed based on the predicted mobilities of the best performing ANN. This response surface pointed to two optima; pH 9.0-9.1 and 60-65 mM SDS, and pH 8.4-8.6 and 50-60 mM SDS. Separation of all 12 explosives was achieved at the second optimum. The separation was further improved by changing the capillary to an extended cell detection window and reducing the diameter of the capillary from 75 microm to 50 microm. This provided a more efficient separation without compromising detection sensitivity. 相似文献