首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   12938篇
  免费   474篇
  国内免费   2篇
管理学   1975篇
民族学   89篇
人才学   1篇
人口学   1227篇
丛书文集   29篇
理论方法论   1150篇
综合类   194篇
社会学   6490篇
统计学   2259篇
  2023年   105篇
  2022年   81篇
  2021年   106篇
  2020年   281篇
  2019年   359篇
  2018年   521篇
  2017年   591篇
  2016年   494篇
  2015年   312篇
  2014年   410篇
  2013年   2209篇
  2012年   523篇
  2011年   397篇
  2010年   345篇
  2009年   333篇
  2008年   356篇
  2007年   333篇
  2006年   364篇
  2005年   299篇
  2004年   243篇
  2003年   219篇
  2002年   247篇
  2001年   239篇
  2000年   239篇
  1999年   176篇
  1998年   165篇
  1997年   148篇
  1996年   159篇
  1995年   147篇
  1994年   162篇
  1993年   140篇
  1992年   162篇
  1991年   175篇
  1990年   183篇
  1989年   156篇
  1988年   175篇
  1987年   148篇
  1986年   140篇
  1985年   143篇
  1984年   149篇
  1983年   137篇
  1982年   101篇
  1981年   84篇
  1980年   94篇
  1979年   120篇
  1978年   95篇
  1977年   74篇
  1976年   84篇
  1975年   59篇
  1974年   79篇
排序方式: 共有10000条查询结果,搜索用时 109 毫秒
991.
Physicians often determine the demand for health care services, as well as control the clinical processes aimed at improving health outcomes at the individual and population level. Given their important role in enhancing health status and improving the health care delivery system, it is critical that physician executives master the tools necessary to positively influence physician behavior. But changing behavior is far more complex than "doing it or not doing it." The Nike slogan "just do it" is motivating, but over-simplified. The roots of human change include: consciousness-raising, emotional arousal, commitment, helping relationships, self-reevaluation, reward, and environmental control. A model to effectively influence behavior is presented and includes setting clear expectations, measuring and monitoring performance, providing feedback, and rewarding and recognizing improvement. If all else fails, try discipline. This five-step approach is based on the science of human behavior and working with physicians in diverse settings, ranging from academic medical centers to small practices.  相似文献   
992.
Managing workplace conflict is one of the most important, stressful, and time-consuming tasks faced by today's medical leaders. Poorly managed workplace conflict can alienate patients, demoralize staff, increase turnover, damage relationships with valued referral sources and third party carriers concerned about patient satisfaction, and lead medical practices to costly "corporate divorces." Physician executives cannot solve the problems caused by disruptive doctors simply by bolstering their own conflict management skills or by policing offenders. The larger contexts within which inappropriate workplace behavior occurs must also be assessed and addressed. The true leadership challenge is to intervene in ways that help to foster a "culture" of appropriate interpersonal dynamics throughout your organization. This requires learning to think and to intervene systematically.  相似文献   
993.
Health Risk Assessment of a Modern Municipal Waste Incinerator   总被引:2,自引:0,他引:2  
During the modernization of the municipal waste incinerator (MWI, maximum capacity of 180,000 tons per year) of Metropolitan Grenoble (405,000 inhabitants), in France, a risk assessment was conducted, based on four tracer pollutants: two volatile organic compounds (benzene and 1, 1, 1 trichloroethane) and two heavy metals (nickel and cadmium, measured in particles). A Gaussian plume dispersion model, applied to maximum emissions measured at the MWI stacks, was used to estimate the distribution of these pollutants in the atmosphere throughout the metropolitan area. A random sample telephone survey (570 subjects) gathered data on time-activity patterns, according to demographic characteristics of the population. Life-long exposure was assessed as a time-weighted average of ambient air concentrations. Inhalation alone was considered because, in the Grenoble urban setting, other routes of exposure are not likely. A Monte Carlo simulation was used to describe probability distributions of exposures and risks. The median of the life-long personal exposures distribution to MWI benzene was 3.2·10–5 g/m3 (20th and 80th percentiles = 1.5·10–5 and 6.5·10–5 g/m3), yielding a 2.6·10–10 carcinogenic risk (1.2·10–10–5.4·10–10). For nickel, the corresponding life-time exposure and cancer risk were 1.8·10–4 g/m3 (0.9.10–4 – 3.6·10–4 g/m3) and 8.6·10–8 (4.3·10–8–17.3·10–8); for cadmium they were respectively 8.3·10–6 g/m3 (4.0·10–6–17.6·10–6) and 1.5·10–8 (7.2·10–9–3.1·10–8). Inhalation exposure to cadmium emitted by the MWI represented less than 1% of the WHO Air Quality Guideline (5 ng/m3), while there was a margin of exposure of more than 109 between the NOAEL (150 ppm) and exposure estimates to trichloroethane. Neither dioxins nor mercury, a volatile metal, were measured. This could lessen the attributable life-long risks estimated. The minute (VOCs and cadmium) to moderate (nickel) exposure and risk estimates are in accord with other studies on modern MWIs meeting recent emission regulations, however.  相似文献   
994.
Previous research has suggested that high levels of burnout lead to impaired functioning on the job. However, as this research has usually relied on self-reported performance, it is imperative to examine whether this association is also confirmed when using “objective” performance data (e.g., supervisor reports). This study reviewed previous research on the associations between burnout (exhaustion, depersonalization, and personal accomplishment) and various types of objective performance. A systematic literature search identified 16 studies dealing with the burnout-performance relationship. These studies showed the wide variety of approaches that are used to study burnout and objective performance. Using data from these 16 studies, a meta-analysis was conducted to obtain mean correlations. The meta-analytical correlations between exhaustion and in-role behaviour (based on five studies), organizational citizenship behaviour (OCB; five studies), and customer satisfaction (two studies) were -.22, -.19, and -.55, respectively, underlining the practical relevance of burnout research for organizational performance. The evidence for the relationships between depersonalization, personal accomplishment, and performance was inconclusive. Future research should focus on valid indicators of job performance, should more often employ longitudinal designs and large samples, and should consider the theoretical basis for the study expectations more extensively.  相似文献   
995.
A report of the 1989 NCDA survey of the perceptions of American adults of their career planning, the nature of their workplaces, and the availability of and utility of occupational information is presented. The survey, which was administered by the Gallup Organization, included an oversampling of Hispanics, African Americans, and Asian-Pacific Islanders. Although the results for all groups including Whites are presented, the emphasis is upon the perceptions of minority groups.  相似文献   
996.
Summary. The paper presents a general strategy for selecting the bandwidth of nonparametric regression estimators and specializes it to local linear regression smoothers. The procedure requires the sample to be divided into a training sample and a testing sample. Using the training sample we first compute a family of regression smoothers indexed by their bandwidths. Next we select the bandwidth by minimizing the empirical quadratic prediction error on the testing sample. The resulting bandwidth satisfies a finite sample oracle inequality which holds for all bounded regression functions. This permits asymptotically optimal estimation for nearly any regression function. The practical performance of the method is illustrated by a simulation study which shows good finite sample behaviour of our method compared with other bandwidth selection procedures.  相似文献   
997.
998.
Kleinian theory seems both intimidating and alien to many American psychotherapists. This paper offers an entry into Klein's work. The theory is approached by emphasizing three areas especially valuable in clinical practice: mourning and manic defenses, schizoid relationships, and envy and idealization. A detailed presentation of an individual psychotherapy case is offered as an illustration of how her ideas may be integrated into a broader objectrelations treatment perspective.  相似文献   
999.
Information gathered from over 1000 adoptions in the fourth year of a prospective study of adoptions finds satisfaction levels to be quite high, with those families adopting through private agencies to feel best prepared and satisfied. Differences by adoption auspice are detailed and discussed.The senior authors are Co-Principal Investigators of the California Long-range Adoption Study. This research was supported by the Child Welfare Research Center, Family Welfare Research Group, University of California at Berkeley, through a grant from the Children's Bureau, Administration for Children and Families, Department of Health and Human Services. The authors wish to thank the families for their participation. Please address correspondence to Mary Berry at the Center for Child Welfare, UTA School of Social Work, P.O. Box 19129, Arlington, Texas 76019.  相似文献   
1000.
Studies of post-traumatic stress disorder have focused primarily on veterans, generally ignoring their female partners (wives or girlfriends). recently, clinicians have begun to identify PTSD-like symptoms in these female partners, but the literature describing this phenomenon has been limited. This paper addresses the fact that women in long-term relationships with veterans suffering from PTSD commonly experience PTSD-like psychiatric symptoms themseoves. These wonem's symptoms and issues they face in their relationships with their veteran partners are described. Conceptual explanations of and causal factors for these women's symptoms are presented, followed by discussion of treatment approaches and issues.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号