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121.
□ A doubly nonstationary cylinder-based model is built to describe the dispersal of a population from a point source. In this model, each cylinder represents a fraction of the population, i.e., a group. Two contexts are considered: The dispersal can occur in a uniform habitat or in a fragmented habitat described by a conditional Boolean model. After the construction of the models, we investigate their properties: the first and second order moments, the probability that the population vanishes, and the distribution of the spatial extent of the population. 相似文献
122.
This article explores race relations and racism within the lesbian, gay, bisexual, transgender, and queer (LGBTQ) community of Toronto, Ontario, from the perspective of seven gay/queer social service providers of color. Social constructions of race, race relations, and racism were placed at the centre of analysis. Employing interpretive phenomenological analysis, findings indicated that intergroup and broader systemic racism infiltrates the LGBTQ community, rendering invisible the lived experiences of many LGBTQ people of color. The study contributes to a growing body of research concerning our understanding of factors underpinning social discrimination in a contemporary Canadian LGBTQ context. 相似文献
123.
We provide the first global assessment of the sources of population aging by tracing its origins to the demographic histories of more and less developed countries. In more developed countries, improvements in survival among successive cohorts have accounted for the large majority of the recent increase in the population's mean age. Improved survivorship and declines in the growth rate of births have made roughly equal contributions to the aging that is occurring in less developed countries. Aging is more rapid in less developed countries because the number of births has declined faster, with China and India making large contributions. Use of the proportion of the population above age 65, 70, or 75 as measures of aging produces results similar to those using the mean age. Mortality decline becomes an even larger contributor to aging using all these measures, and its contribution grows as age advances. 相似文献
124.
Samuel Stroope 《Social indicators research》2012,105(3):499-518
Building on the implications of qualitative work from India and urbanism theories, I aim to understand whether religious bonding
social capital in contemporary India increases with greater urbanization and whether such increases are moderated by caste
or social class position. Results from multinomial logistic regression on 1,417 Hindu respondents in a nationally representative
sample of India (World Values Survey-India 2001) indicate that religious bonding is fostered by urbanism and that this association
is stronger for upper castes. But there is little evidence that social class similarly moderates the association between urbanism
and religious bonding. In light of these findings, religious bonding might be better understood as rooted in the interaction
of caste dynamics and changes in the urban environment, rather than as a result of greater affluence. The data are also consistent
with work underscoring the importance of disentangling social class and caste among Hindus in contemporary India. 相似文献
125.
Due to the poor performance of US students in international math and science tests, many authors worry that the US lead in science is in jeopardy. A recent study by Chen and Luoh (Soc Indic Res 96: 133–143, 2010) challenged this pessimistic view by delinking test performance and labor force quality. It was found that measures such as researchers per capita or scientific journal articles per capita can better account for economic performance. Because it takes time for education and R&;D to yield returns, this project replicated the preceding study using a time-lag structure. Although the results partly concur with previous findings, it is important to point out that GDP might depend on multiple variables acting together. Instead of solely focusing on reforming STEM education as partly measured by international test scores, improving the R&;D infrastructure and openness in trade could also be crucial to the future of the economy. 相似文献
126.
127.
Leonie J. Pearson Samuel Wilson Yoshihisa Kashima Dean Lusher Craig J. Pearson 《Policy Studies》2016,37(3):197-215
Over the past three decades, irrigation-dependent rural communities in Australia's Murray–Darling Basin have experienced profound economic, social and environmental changes, which they are attempting to accommodate through local government policy. As a contribution to participatory policy design research, in consultation with local governments we carried out focus groups to explore diversity of individuals’ imagined past and present in two rural communities. This was followed by group development of a diverse range of future scenarios and agreement to three likely scenarios. The research identified presence or absence of three underlying themes – irrigation, innovation and inflow of people – that plausibly drive change in these rural communities. These themes are likely to be common to many rural communities that have depended on irrigated agriculture. They provide an example of participatory policy-making, as distinct from the historically employed top-down policy development that has occurred in the Murray–Darling Basin. Because of the diversity of perceptions of past, present and futures, and the ultimate adoption of business-as-usual within the final local government plans, the research emphasises the need to put effort into community deliberations to build cohesion and share ownership of the process for delivering locally nuanced community policy. 相似文献
128.
Samuel T. Hunter Katrina E. Bedell-Avers Michael D. Mumford 《The Leadership Quarterly》2009,20(3):383-404
Revisiting the work of Weber [Weber, M. (1921). The theory of social and economic organizations. New York: Free Press], Mumford and colleagues (e.g., [Strange, J. M., & Mumford, M. D. (2002). The origins of vision: Charismatic versus ideological leadership. Leadership Quarterly, 13, 343?377; Mumford, M.D. (2006). Pathways to outstanding leadership: A comparative analysis of charismatic, ideological and pragmatic leaders. Mahwah, NJ: Erlbaum.]) explored the thesis that in addition to charismatic leadership, there exist at least two additional pathways to outstanding leadership: ideological and pragmatic. Despite the compelling results of initial studies, however, questions remain as to when and under what situational conditions these three leaders operate most effectively. As such, an experiment was conducted to investigate two noteworthy contextual influences: 1) situational congruence with a leader's mental model and 2) environmental complexity. The experiment made use of a computerized leadership simulation where participants took on the role of a university chancellor. Results indicate that leader type, complexity, and situational framing were critical factors in determining leader performance on multiple game performance criteria as well as creative process criteria. Implications and avenues for future research are discussed. 相似文献
129.
Cheryl L. Currie T. Cameron Wild Donald P. Schopflocher Lory Laing Paul Veugelers Brenda Parlee 《Journal of gambling studies / co-sponsored by the National Council on Problem Gambling and Institute for the Study of Gambling and Commercial Gaming》2013,29(3):393-415
Little is known about risk factors for problem gambling (PG) within the rapidly growing urban Aboriginal population in North America. Racial discrimination may be an important risk factor for PG given documented associations between racism and other forms of addictive behaviour. This study examined associations between racial discrimination and problem gambling among urban Aboriginal adults, and the extent to which this link was mediated by post traumatic stress. Data were collected via in-person surveys with a community-based sample of Aboriginal adults living in a mid-sized city in western Canada (N = 381) in 2010. Results indicate more than 80 % of respondents experienced discrimination due to Aboriginal race in the past year, with the majority reporting high levels of racism in that time period. Past year racial discrimination was a risk factor for 12-month problem gambling, gambling to escape, and post traumatic stress disorder (PTSD) symptoms in bootstrapped regression models adjusted for confounders and other forms of social trauma. Elevated PTSD symptoms among those experiencing high levels of racism partially explained the association between racism and the use of gambling to escape in statistical models. These findings are the first to suggest racial discrimination may be an important social determinant of problem gambling for Aboriginal peoples. Gambling may be a coping response that some Aboriginal adults use to escape the negative emotions associated with racist experiences. Results support the development of policies to reduce racism directed at Aboriginal peoples in urban areas, and enhanced services to help Aboriginal peoples cope with racist events. 相似文献
130.
Samuel A. MacMaster Ph.D. 《Journal of Family Social Work》2013,16(1):50-73
ABSTRACT The impact that substance use has on an individual with mental illness has been documented; however, little is known about the impact that this may have for a family caregiver. Data was collected in a cross sectional study using mailed questionnaires to a convenience sample of family members of persons with mental illness (n = 110). Hierarchical linear regression analysis was used to determine the impact of substance use status upon four measures of well-being within a stress-coping model. The variables within the model were able to account for a significant proportion of the variance in each of the measures: perceptions of burden, depression, anxiety and physical health status (R2 = .419 to .202). However, substance use status was not a significant predictor in any of these equations. Symptomatology and a measure of specific social support were the most significant predictors of burden (β = .345, p < .001 and β = .330, p < .001). Perceptions of caregiver burden were found to be the most significant predictor in each of the other three analyses (β = .515, p < .000; β = .511, p < .000; β = ? .571, p < .000). Results of this study suggest that substance use may not be as important as the other predictors included in the model in determining the well-being of family caregivers. 相似文献