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991.
992.
For business demographers, a noteworthy aspect of national population aging is the course of its onset at local scales, such as neighborhoods and individual city blocks. Across the U. S., particular neighborhoods are evolving through aging in place into de facto retirement communities, populated by elderly residents who continue to live independently. An increasingly common manifestation of this development is the so-called naturally occurring retirement community (NORC)—a neighborhood where adults have stayed on and grown old while younger people have drifted away. NORCs materialize gradually over time where initial cohorts settle in close proximity and age in place, while subsequent younger cohorts move away. These settings offer novel opportunities for prolonging independent living in old age. They constitute distinctive readymade consumer markets as well, especially for businesses that rely on word of mouth. We present a general approach to spotting NORCs. We then consider such enclaves as potential target markets, both for community planners aiming to centralize service delivery to the elderly and for businesses offering types of services that can be bundled profitably for these residential concentrations of elderly.  相似文献   
993.
Some experimenters carry out their investigation in stages. They begin with an initial 2n-p fraction of resolution IV, in which the main effects are clean and the interactions are aliased in chains, Then, having analyzed the initial experiment, they plan further runs to isolate certain interactions by breaking the chains. In this paper a method called semifolding, for choosing the points in the second experiment, is presented.  相似文献   
994.
Environmental control measures (ventilation, high-efficiency particulate air filtration, and upper room ultraviolet germicidal irradiation [UVGI]) are recommended to effectively control tuberculosis (TB) transmission from unsuspected TB patients in high-risk settings, but the effectiveness of their use is not often clear. This study presents a simulation model for a hypothetical hospital waiting room, in which the number of susceptible immunocompetent people in the waiting room follows a Poisson distribution (M = 5) in either low (annual number of TB patients = 5) or high TB risk settings (annual number of TB patients = 50), and used the model to evaluate the reduction of TB transmission risk by upper room UVGI. An exponential dose-response model was used for TB transmission and a two-zone model was used for evaluating the effect of upper room UVGI. Upper room UVGI reduced TB risk by 1.6-fold at 3 microW/cm2 UV irradiance in the upper room in the low TB risk setting and by 4.1-fold at 15 microW/cm2 UV irradiance in the upper room in the high TB risk setting. Use of upper room UVGI also reduced the mean annual new infection rate from 2.2 to 1.3 infections per year at 3 microW/cm2 and to 0.6 infections per year at 15 microW/cm2 in our hypothetical high-risk settings. The effect of upper room UVGI was sensitive to both vertical air velocity (air mixing) and UV irradiance level. Results from partitioning variability indicate that most variability of TB transmission risk came from waiting time in our hypothetical hospital.  相似文献   
995.
Despite an increased level of legalization of JHA, academic literature has paid little attention to the role of law in this field. It is the objective of this article to assess the EU's attempt to reconcile its current practices of extraterritorial border control coordinated by Frontex in the Mediterranean with international human rights law, notably the principle of non‐refoulement. By drawing on insights on both rationalist and constructivist accounts, we argue that international human rights principles such as non‐refoulement are usually broad enough for everyone to identify and agree with and to provide state actors sufficient leeway to interpret the rules according to their interest. However, thanks to the activities of numerous inter‐, supra‐, and transnational actors offering various and competing legal interpretations, EU member states feel compelled to react by triggering several rounds of rule‐specification that have the power to clarify pertinent law and strengthen fundamental rights standards.  相似文献   
996.
John Kitsuse and Malcolm Spector’s theoretical framework for the analysis of social problems is revisited and an alternative formulation is sketched out, albeit one that maintains a focus on constructivist processes. Spector and Kitsuse’s model posits actors (claims-makers and counter-claimants) who possess moral certitude regarding what is objectionable and worthy of remedial action; by contrast, the present discussion suggests grounding the study of social problems in experiences characterized by uncertainty. The concept of “problematic sociality” is proposed as a way of identifying such circumstances. Sociality — routine, coordinated and manageable forms of association among individuals and between groups — becomes problematic when interactions are experienced as persistently difficult to navigate, distressing, or otherwise viscerally onerous. Encounters with problematic sociality may be connected to underlying social transformations and disruptions. The concept of problematic sociality therefore suggests there is merit in pairing the study of social problems with the study of social change.  相似文献   
997.
998.
This article addresses the problem of the bias of income and expenditure elasticities estimated on pseudopanel data caused by measurement error and unobserved heterogeneity. We gauge these biases empirically by comparing cross-sectional, pseudo-panel, and true panel data from both Polish and U.S. expenditure surveys. Our results suggest that unobserved heterogeneity imparts a downward bias to cross-section estimates of income elasticities of at-home food expenditures and an upward bias to estimates of income elasticities of away-from-home food expenditures. “Within” and first-difference estimators suffer less bias, but only if the effects of measurement error are accounted for with instrumental variables.  相似文献   
999.
The purpose of this study was to compare young people seeking homeless services in two distinct geographic locations (Austin, Texas and St. Louis, Missouri). To determine differences between the two populations, the study used a guiding conceptual model of social estrangement that included four domains: institutional disaffiliation, psychological dysfunction, human capital, and identification with homeless culture. A sample of homeless youth (N = 96; 46 from St. Louis, 50 from Austin) were recruited through youth-serving agencies. Findings indicate two unique samples of street-involved youth in regards to affiliation with formal institutions, family support, and informal peer networks, suggesting distinct service needs.  相似文献   
1000.
This article explores the history of employment training programmes for prisoners and three contemporary examples of practice. It argues that the history and current practice can be seen as a movement between two competing discourses. One that treats prison work as relevant for how it passes time and the other for how it prepares a prisoner for release. These are referred to as a ‘constative’ position‐one where the activity is only related to the here and now‐and the ‘performative’‐where the activity is said to ‘rehearse’ the prisoner for action to be performed at a later date. By examining projects that use drama workshops to examine employment issues with prisoners, the article argues that these positions are limited. It claims that the link between prison activity and performance outside is far more complicated than a simple shift of new competencies from one arena to another. This transition is met more often by the ‘bewilderment’ of the title than by a smooth transition. The article concludes that drama workshops in fact have a potential to offer a more powerful intervention than simple behaviour rehearsal and that they could provide one means for bridging the gap between the fictional arena of prison and the ‘real’ world. Este artículo explora la historia de programas de capacitacioén laboral para presos y de tres ejemplos contemporáneos de práctica. Sostiene que la historia y la práctica actual pueden considerarse como un movimiento entre dos discursos competidores. Los dos consideran relevantes las actividades laborales en la cárcel, el uno porque ayuda a pasar el tiempo, y el otro porque prepara al preso para la puesta en libertad. Se refiere a los dos discursos como (1) la posición ‘constativa’, en la cual la actividad laboral se relaciona únicamente al momento actual y (2) la posición ‘performativa’, en la cual la actividad laboral sirve de ensayo para actividades que desempeñaráel preso en una fecha por venir. Al examinar proyectos que recurren a talleres del drama para examinar temas laborales con los presos, este artículo sostiene que están limitadas estas posiciones. Alega que la conexión entre la actividad en la cárcel y el desempeño fuera de la cárcel supone algo mucho mas complicado que un sencillo cambio de nuevas competencias de una arena a otra. Sostiene que esta transición se caracteriza mas por el desconcierto que provoca que por su suavedad. El artículo concluye que los talleres del drama pueden ofrecer una intervención mas poderosa que los sencillos ensayos de conducta, y que podrían ofrecer un medio de salvar la distancia entre la arena ficticia de la cárcel y el mundo ‘verdadero’.  相似文献   
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