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991.
Objective . Though many decry the decline in political participation and interest, few academic studies present a clear approach to help reverse these trends. This paper examines the impact of service-learning programs on students' self-concept, political engagement, and attitudes toward out-groups. Methods . The data come from a pre and post survey given to more than 200 high school students in 10 different schools. We use Huber regression to assess the impact of student voice in the service-learning project on six dependent variables. Results . We show that if students are involved in service-learning projects in which they have a high degree of voice and ownership, their self-concept and political engagement will improve, and they become more tolerant toward out-groups. Conclusion . In short, having a voice in service-learning programs builds citizenship.  相似文献   
992.
We compare results for stochastic volatility models where the underlying volatility process having generalized inverse Gaussian (GIG) and tempered stable marginal laws. We use a continuous time stochastic volatility model where the volatility follows an Ornstein–Uhlenbeck stochastic differential equation driven by a Lévy process. A model for long-range dependence is also considered, its merit and practical relevance discussed. We find that the full GIG and a special case, the inverse gamma, marginal distributions accurately fit real data. Inference is carried out in a Bayesian framework, with computation using Markov chain Monte Carlo (MCMC). We develop an MCMC algorithm that can be used for a general marginal model.  相似文献   
993.
994.
The improvised explosive device (IED) is a weapon of strategic influence on today's battlefield. IED detonations occur predominantly on roads, footpaths, or trails. Therefore, locations are best described when constrained to the road network, and some spaces on the network are more dangerous at specific times of the day. We propose a statistical model that reduces the spatial location to one dimension and uses a cyclic time as a second dimension. Based on the Poisson process methodology, we develop normalised, inhomogeneous, bivariate intensity functions measuring the threat of attack to support resourcing decisions. A simulation and an analysis of attacks on a main supply route in Baghdad are given to illustrate the proposed methods. Additionally, we provide an overview of the growing demand for the analysis efforts in support of operations in Afghanistan and Iraq, and provide an extensive literature review of developments in counter-IED analysis.  相似文献   
995.
To assess HIV disclosure discussions and related sexual behaviors among men who have sex with men (MSM) who meet sex partners online, 28 qualitative interviews with Seattle-area MSM were analyzed using grounded theory methods and themes and behavior patterns were identified. MSM found a greater ease in communicating and could prescreen partners through the Internet. However, no consistent relationship was found between HIV disclosure and subsequent behaviors: some were safer based on disclosure while perceived HIV status led others to risky behaviors. Interventions need to promote accurate disclosure while acknowledging its limitations and the need for men to self-protect.  相似文献   
996.
To date, the dominant approach to leadership research assumes that all aspects of the leadership role within a team are embodied by a single individual. In the real world, however, this is rarely the case. Rather, multiple individuals within the team may serve as leaders in both formal and informal capacities, and the shifting of leadership responsibilities is often rooted in which individual's expertise is most relevant to the given problem. In the present effort, we add to the rapidly growing body of work that focuses on the distribution of the leadership role among multiple individuals. We have reviewed relevant extant literature and proposed an integrated framework for understanding the collective leadership process. Also, in developing this framework we have taken an information and expertise-based approach such that we propose that collective leadership, or the distribution of the leadership role, is a function of selectively utilizing the information or specialized expertise that individuals within the network possess. In reviewing the framework, 55 propositions with regard to the collective leadership process are outlined and suggestions for future research are provided.  相似文献   
997.
Established in August 1994, QUEST is Hawaii's Medicaid 1115 managed care, demonstration waiver. QUEST extends EPSDT (Early and Periodic Screening, Diagnosis, and Treatment) benefits to nearly 106,000 enrollees in Hawaii, or almost three out of every 10 individuals under the age of 21 in the state. Under QUEST, more beneficiaries in younger age groups are covered, compared to those in older age groups. In the 1999 federal fiscal year, QUEST attained an overall 89% screening rate and a 64% participant rate. Although the screening and participation rates can be improved, steady progress has been achieved in the past five years. More children and youths are now covered and the participant rate has gained 24 points since 1994. Much of this progress is due to QUEST's emphasis on managed care to deliver EPSDT services.  相似文献   
998.
The study of emotion elicitation in the caregiver‐infant dyad has focused almost exclusively on the facial and vocal channels, whereas little attention has been given to the contribution of the tactile channel. This study was undertaken to investigate the effects of touch on infants' emotions. During the time that objects were presented to the dyad, mothers provided tactile stimulation to their 12‐month‐old infants by either (a) tensing their fingers around the infants' abdomen while abruptly inhaling, (b) relaxing their grip around the infants' abdomen, or (c) not providing additional tactile stimulation (control condition). The results revealed that infants in the first condition (a) touched the objects less and waited longer to touch the objects while displaying more negative emotional displays compared to infants in the control condition. However, no apparent differences were found between infants in the second condition (b) and the control condition. The results suggest that infants' emotions may be elicited by specific parameters of touch.  相似文献   
999.
This article examines the role of inter‐agency cooperation, which is one form of ‘partnership’, in new approaches to employability in the UK. The article articulates a ‘model for effective partnership working’ on employability. This model is applied first in a general review of employability policy and then to discuss case study research on the recent ‘Pathways to Work’ and ‘Working Neighbourhoods’ pilots. It is argued that successful partnerships need a clear strategic focus based on a necessity for inter‐agency cooperation and institutional arrangements that allow for shared ownership, trust and mutualism, and flexibility in resource‐sharing. While some of these factors are apparent in UK employability services, an over‐reliance on contractualism and centralized organizational structures may undermine partnership‐based approaches. Many of the success factors associated with effective partnership working appeared to be in place, even though the role of the Public Employment Service was fundamentally different in each case (as a key actor in implementing the first pilot, but largely withdrawing from the implementation role in the second). The article concludes by outlining the relevance of this model and the case study findings to discussions of the future development of employability policies and related partnership working.  相似文献   
1000.
Objective. As the price of energy swells, renewable energy sources will serve as important alternatives to fossil fuels. Identifying what influences a state to adopt a policy that promotes the construction of renewable energy sources is an important step toward understanding the nature of our future energy supplies. Methods. Using an event‐history analysis, we examine three competing diffusion explanations on the likelihood of a state adopting net metering. Results. We find that regional policy diffusion influences the likelihood of a state to adopt a net metering policy. Conclusions. The results suggest that states are learning from one another and that the EPA's regional offices help facilitate this diffusion.  相似文献   
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