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51.
Network knowledge and the use of power 总被引:1,自引:0,他引:1
Complementing recent work on the effects of power on network perceptions, we offer a theory specifying how knowledge of network structures and exchange processes differentially affect the use of power by advantaged and disadvantaged positions. We argue that under certain conditions, network knowledge is beneficial to occupants of low-power positions, but not to occupants of high-power positions. Any low-power actor can benefit from having superior information, but if all low-power actors have equally sound knowledge, then all are worse off—a type of social trap. We tested these arguments by manipulating power and the availability of information on network structure and exchange processes in an experimental exchange network setting. The results were supportive. 相似文献
52.
Pawlecki B 《Physician executive》2011,37(3):56-59
Health care organizations, along with non-health-related industries, need to do a better job helping workers who are caring for sick or elderly relatives. 相似文献
53.
Robert E. O'Connor Brent Yarnal Kirstin Dow Christine L. Jocoy Gregory J. Carbone 《Risk analysis》2005,25(5):1265-1275
Experts contend that weather and climate forecasts could have an important role in risk management strategies for community water systems. Yet, most water managers make minimal use of these forecasts. This research explores the determinants of the use of weather and climate forecasts by surveying managers of community water systems in two eastern American states (South Carolina and the Susquehanna River Basin of Pennsylvania). Assessments of the reliability of weather and climate forecasts are not driving their use as water managers who find forecasts reliable are no more likely to use them than are managers who find them unreliable. Although larger systems and those depending on surface water are more likely to use forecasts for some (but not all) purposes, the strongest determinant of forecast use is risk perceptions. Water managers who expect to face problems from weather events in the next decade are much more likely to use forecasts than are water managers who expect few problems. Their expectations of future problems are closely linked with past experience: water managers who have had problems with specific types of weather events (e.g., flood emergencies) in the last 5 years are likely to expect to experience problems in the next decade. Feeling at risk, regardless of the specific source of that weather-related risk, stimulates a decision to use weather and climate forecasts. 相似文献
54.
Development of a Standard Soil-to-Skin Adherence Probability Density Function for Use in Monte Carlo Analyses of Dermal Exposure 总被引:2,自引:0,他引:2
It has recently been suggested that "standard" data distributions for key exposure variables should be developed wherever appropriate for use in probabilistic or "Monte Carlo" exposure analyses. Soil-on-skin adherence estimates represent an ideal candidate for development of a standard data distribution: There are several readily available studies which offer a consistent pattern of reported results, and more importantly, soil adherence to skin is likely to vary little from site-to-site. In this paper, we thoroughly review each of the published soil adherence studies with respect to study design, sampling, and analytical methods, and level of confidence in the reported results. Based on these studies, probability density functions (PDF) of soil adherence values were examined for different age groups and different sampling techniques. The soil adherence PDF developed from adult data was found to resemble closely the soil adherence PDF based on child data in terms of both central tendency (mean = 0.49 and 0.63 mg-soil/cm2 -skin, respectively) and 95th percentile values (1.6 and 2.4 mg-soil/cm2 -skin, respectively). Accordingly, a single, "standard" PDF is presented based on all data collected for all age groups. This standard PDF is lognormally distributed; the arithmetic mean and standard deviation are 0.52 ± 0.9 mg-soil/cm2 -skin. Since our review of the literature indicates that soil adherence under environmental conditions will be minimally influenced by age, sex, soil type, or particle size, this PDF should be considered applicable to all settings. The 50th and 95th percentile values of the standard PDF (0.25 and 1.7 mg-soil/cm2 -skin, respectively) are very similar to recent U.S. EPA estimates of "average" and "upper-bound" soil adherence (0.2 and 1.0 mg-soil/cm2 -skin, respectively). 相似文献
55.
Brent J. Atkinson 《Journal of marital and family therapy》1992,18(4):389-393
After reacting specifically to Simon's (1992) proposal for the integration of first and second-order therapies, I note how he, as well as Anderson and Goolihian (1988, 1990), focus primarily on deliberate, intentional ways to promote a respectful stance in therapy. Although a consideration of which intentional stances and strategies will promote the most helpful conversations in therapy is important, an even more critial question concerns the possible limitations of intentional efforts and the relation of conscious mind to other natural orders of mind in the living world. I suggest that deliberate efforts on the part of theapists toward any intended therapeutic outcomes must be comlemented by instictive and intuitive ways of participating with clients. 相似文献
56.
57.
Harold D. Grotevant Manfred H. M. van Dulmen Nora Dunbar Justine Nelson‐Christinedaughter Mathew Christensen Xitao Fan Brent C. Miller 《Journal of research on adolescence》2006,16(1):105-131
This study examined the contribution of demographic characteristics, early maltreatment, and peer and family relationships during adolescence to the prediction of aggressive and nonaggressive antisocial behavior (AASB and NAASB, respectively) during young adulthood; and determined whether adoption status has additional ability to predict ASB, once background, early experience, peer, and family variables were controlled. Data from adolescent and parent interviews were used from Waves 1 (predictors) and 3 (outcomes) of the National Longitudinal Study of Adolescent Health (Add Health). The sample included 337 adopted and 10,339 nonadopted adolescents whose mean ages were 15.8 at W1 and 21.7 at W3. Although AASB and NAASB were predicted by background characteristics, early maltreatment, peer relations, and family relationships, adoption status had little to no additional predictive power once the other variables were controlled. 相似文献
58.
This is a study of 758 adolescents, aged 13 to 18 years, randomly selected from two public high schools in the South. The purpose is to examine the relative relationships between several predictors and violence in two age groups (ages 15 and younger versus 16 and older), and to investigate interactions between several of the predictors within these age groups. As hypothesized, there are differences in which factors predict violence according to age, and interactions between these predictors also differ between the two age groups. The social work practice implications of these findings are discussed. 相似文献
59.
Michael E. O'Neill Peter C. Thomson Brent C. Jacobs Phil Brain Ruth C. Butler Heather Turner Bernadetha Mitakda 《Australian & New Zealand Journal of Statistics》2004,46(3):349-366
This paper reviews current methods for fitting a range of models to censored seed germination data and recommends adoption of a probability‐based model for the time to germination. It shows that, provided the probability of a seed eventually germinating is not on the boundary, maximum likelihood estimates, their standard errors and the resultant deviances are identical whether only those seeds which have germinated are used or all seeds (including seeds ungerminated at the end of the experiment). The paper recommends analysis of deviance when exploring whether replicate data are consistent with a hypothesis that the underlying distributions are identical, and when assessing whether data from different treatments have underlying distributions with common parameters. The inverse normal distribution, otherwise known as the inverse Gaussian distribution, is discussed, as a natural distribution for the time to germination (including a parameter to measure the lag time to germination). The paper explores some of the properties of this distribution, evaluates the standard errors of the maximum likelihood estimates of the parameters and suggests an accurate approximation to the cumulative distribution function and the median time to germination. Additional material is on the web, at http://www.agric.usyd.edu.au/staff/oneill/ . 相似文献
60.