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191.
Jim Q. Smith & Álvaro E. Faria Jr 《Journal of the Royal Statistical Society. Series B, Statistical methodology》2000,62(3):525-544
A supra-Bayesian (SB) wants to combine the information from a group of k experts to produce her distribution of a probability θ. Each expert gives his counts of what he thinks are the numbers of successes and failures in a sequence of independent trials, each with probability θ of success. These counts, used as a surrogate for each expert's own individual probability assessment (together with his associated level of confidence in his estimate), allow the SB to build various plausible conjugate models. Such models reflect her beliefs about the reliability of different experts and take account of different possible patterns of overlap of information between them. Corresponding combination rules are then obtained and compared with other more established rules and their properties examined. 相似文献
192.
This paper presents findings from a new study of outcomes for young people leaving care funded by the Department for Education and Skills. It reports findings for a sample of 106 young people in relation to progress made in housing and employment some 12–15 months after leaving care. The generally poor employment outcomes of care leavers are acknowledged, but ingredients that make for success are also highlighted, including the value of settled care and post‐care careers, sound career planning and, significantly, the value of delaying young people’s transitions from care. Early career paths also interconnect with how young people fare in housing, in developing life skills and with other problems in their lives after leaving care. Housing outcomes were more encouraging and predominantly shaped by events after leaving care, and faring well in housing was the factor most closely associated with positive mental well‐being in young people. Some groups that are at risk of faring badly are identified, including young people with mental‐health problems, young people with persistent offending or substance misuse problems and, in some respects, young disabled people. The implications of these findings for leaving care services are considered. 相似文献
193.
M. D. Jiménez Gamero J. M. Muñoz Pichardo J. Muñoz García A. Pascual Acosta 《Journal of applied statistics》2002,29(6):841-854
Several methods have been suggested to detect influential observations in the linear regression model and a number of them have been extended for the multivariate regression model. In this article we consider the multivariate general linear model, Y = XB + k , which contains the linear regression model and the multivariate regression model as particular cases. Assuming that the random disturbances are normally distributed, the BLUE of v B is also normally distributed. Since the distribution of the BLUE of v B and the distribution of the BLUE of v B in the model with the omission of a set of observations differ, to study the influence that a set of observations has on the BLUE of v B , we propose to measure the distance between both distributions. To do this we use Rao distance. 相似文献
194.
Jim Cummins 《Intercultural Education》2015,26(6):455-468
The paper reviews quantitative and qualitative research evidence regarding the relationship between intercultural education and academic achievement among students from socially marginalized communities. Intercultural education is conceptualized as including a focus both on generating understanding and respect for diverse cultural traditions and challenging inequitable distribution of resources and educational opportunities across social groups. As such, intercultural education incorporates notions such as critical literacy and culturally responsive education. By definition, socially marginalized communities have experienced social exclusion and discrimination, often over generations. Thus, educators who adopt an intercultural education orientation are also committed to challenging the operation of coercive relations of power within their school environments. The operation of societal power relations that affect marginalized group students’ academic achievement can be conceptualized along a continuum ranging from structural/societal, through structural/educational, to interpersonal. Structural/societal forms of discrimination are largely outside the scope of what educators can influence directly (e.g. housing segregation). However, the research evidence suggests that educators have considerable power to resist and challenge coercive power relations operating at both structural/educational (e.g. curriculum materials) and interpersonal (e.g. classroom interactions) dimensions of the continuum. Thus, the proposed framework represents an explanatory model to account for patterns of school success and failure among marginalized group students and a predictive model to specify educator behaviors that are likely to promote academic achievement. 相似文献
195.
This paper reviews the burgeoning sociological literature on non‐suicidal self‐injury, in which individuals intentionally harm themselves by cutting, burning, scratching, or smashing their body parts. We identify challenges to studying self‐injury, such as conflicting definitions and categorizations. Comparing self‐injury to other behaviors such as suicide, body modification, and self‐mutilation, we assert that non‐suicidal self‐injury deserves its own conceptual category. We explain how a critical sociological approach provides a valuable counterweight to medical and psychological studies of self‐injury. In particular, this paper advances the deviance perspective. Finally, we highlight how technology has allowed self‐injurers to build supportive communities in cyberspace, blurring the line between hidden and public acts. We conclude with suggestions for future directions in the study of self‐injury. 相似文献
196.
This paper draws on findings from a study of outcomes for youngpeople leaving care funded by the Department for Education andSkills. It explores the informal support networks availableto a sample of 106 young people over a period of 12–15months after leaving care. It examines patterns of contact withbirth families and caregivers, the support that emanated fromthese links and the strategies of leaving care professionalsto strengthen these connections. It also considers the new familiescreated by many young people through relationships with partnersand the onset of parenthood and discusses the continuing supportneeds of young parents. The paper situates the needs and experiencesof care leavers in a wider youth transitions framework and highlightsthe need for continuing professional attention to be given tostrengthening family links as one strategy for helping careleavers to negotiate the transition to adulthood. 相似文献
197.
The Impact of Political Conflict on Social Work: Experiences from Northern Ireland, Israel and Palestine 总被引:1,自引:0,他引:1
Ramon Shulamit; Campbell Jim; Lindsay Jane; McCrystal Patrick; Baidoun Naimeh 《British Journal of Social Work》2006,36(3):435-450
This paper investigates the impact of violent political conflicton social workers and service users in three countries: NorthernIreland, Israel and Palestine. Despite its significance forsocial work (and other helping professions), there is a dearthof research on the subject. The authors construct a researchframework which encapsulates the complexity and ambiguity ofthe issues at stake and three parallel empirical studies, whichfollow this framework, are presented. The findings highlightthe burden of working and living in a violent political conflict,not just for service users but also for social workers. Emotionalstress, fear, competing national and religious identities, yetsome indication of resilience, are key findings from these studies.A number of moral and professional dilemmas emerged across allthree studies, often testing loyalty to universal social workvalues. Thus, some respondents at times found it difficult todeal with colleagues and service users who were perceived tobe the enemy. These studies highlight the needto raise the consciousness of social workers, agencies and policiesabout such issues in a world which is increasingly afflictedby violent political conflict. Support, education and trainingfor social workers which transcend national contexts and furtherinternational research in this important area are recommended. 相似文献
198.
Jim Kay 《Journal of applied statistics》1994,21(1):209-224
Wavelets have aroused much interest and offer advantages in signal and image processing. Wavelets and also the wavelet transform are defined here. Their use as a vehicle for multi-resolution image analysis is discussed in the cases of one and two dimensions, and the decomposition-reconstruction algorithm is described. Some simple examples are presented to illustrate the ideas, and several applications are described. Some ideas for further reading are given. 相似文献
199.
A multinomial logit model is estimated to investigate the destination of students one-year after graduating from high school.
The appropriate specification of the choice set available to high school leavers is as follows: private four-year college,
public four-year college, private two-year college, public two-year college, employed and unemployed. We test for several
possible combinations of these choices and find that these pooled models are all rejected in favour of the full model. The
transition from high school to college and to work is more complex than previous studies have recognised.
Received: 12 July 2002/Accepted: 2 November 2002
All correspondence to Jim Taylor. The authors are grateful to Steve Bradley and an anonymous referee for valuable comments
on a previous draft of this paper. We alone are responsible for the errors and omissions. Anh Nguyen is grateful to the ESRC
for providing financial support. Responsible editor: Daniel S. Hamermesh. 相似文献
200.
Physical and chemical properties of a Hong Kong roadside soil in relation to urban tree growth 总被引:22,自引:2,他引:20
Tree planting in urban areas faces many limitations that suppress performance and increase management burdens. Soil problems are increasingly recognized as an important cause of establishment failures and declines. Recent city-greening programs in Hong Kong necessitate a better understanding of soil difficulties, but relevant information is lacking. A detailed study of physical and chemical properties of a representative roadside soil provides baseline data on edaphic restrictions and hints for correction and amelioration. The soil depth is inadequate for normal root expansion of trees, is excessively stony and sandy, and is beset by poor structure and heavy compaction. Root growth is likely to be restricted by the low levels of porosity and high shear strength. The densely packed surface layer reduces aeration and water movement into the lower layers. The nutrient stock is meager, and the ability to hold available moisture and nutrients is very limited. Soil reaction comparing with local natural soil is uncharacteristically alkaline with pH reaching 8.5 which may induce iron and manganese deficiency. Heavy metals register elevated concentrations especially for lead and zinc, but do not attain phytotoxic levels. The common multiple substrate problems need to be addressed properly before trees are planted. Evaluation of selected soil attributes is advocated for all planting sites. 相似文献