全文获取类型
收费全文 | 95篇 |
免费 | 8篇 |
专业分类
管理学 | 14篇 |
人口学 | 6篇 |
丛书文集 | 1篇 |
理论方法论 | 13篇 |
社会学 | 46篇 |
统计学 | 23篇 |
出版年
2024年 | 1篇 |
2023年 | 2篇 |
2021年 | 2篇 |
2020年 | 2篇 |
2019年 | 9篇 |
2018年 | 5篇 |
2017年 | 9篇 |
2016年 | 7篇 |
2015年 | 6篇 |
2014年 | 7篇 |
2013年 | 15篇 |
2012年 | 5篇 |
2011年 | 6篇 |
2010年 | 3篇 |
2009年 | 3篇 |
2008年 | 2篇 |
2007年 | 2篇 |
2006年 | 4篇 |
2005年 | 1篇 |
2004年 | 1篇 |
2003年 | 4篇 |
2001年 | 1篇 |
1996年 | 1篇 |
1995年 | 1篇 |
1994年 | 1篇 |
1993年 | 1篇 |
1991年 | 1篇 |
1985年 | 1篇 |
排序方式: 共有103条查询结果,搜索用时 0 毫秒
51.
52.
Purpose: To compare the efficacy and safety of sildenafil 25?mg qd, 25?mg bid or 50?mg qd – on treating lower urinary tract symptoms with benign prostatic hyperplasia (LUTS/BPH).Materials and methods: Men aged?>?45 years with LUTS/BPH were randomly assigned to receive sildenafil 25?mg qd (n?=?42), bid (n?=?41), 50?mg qd (n?=?38) or placebo (n?=?41) for 8 weeks. Changes from baseline in International Prostate Symptom Score (I-PSS), maximum urinary flow rate (Qmax) and postvoid residual urine volume (PVR) were assessed at week 4 and week 8.Results: Sildenafil 25?mg qd (-7.3?±?5.8) and 25?mg bid (-7.0?±?5.7) exhibited significant improvements of I-PSS compared to placebo (-5.2?±?6.4) (p?=?0.020, 0.025, respectively). In particular, voiding domain was more affected than storage domain. Only sildenafil 50?mg qd improved nocturia significantly (versus placebo, p?=?0.027). Quality of life score was improved in all treatment groups. Qmax and PVR did not change significantly in all groups. All regimens were well tolerated.Conclusions: Sildenafil 25?mg qd, 25?mg bid and 50?mg qd are safe and effective to improve LUTS/BPH in long term, along with coexisting ED. In particular, nocturia is most well-controlled by 50?mg qd. 相似文献
53.
The present study compared the level of conduct problems at age 17 in a large, non-clinical sample of adopted participants placed in infancy and children in non-adoptive families matched to the adoptive families on demographic characteristics. Higher levels of adolescent and parent adoption satisfaction were associated with lower levels of conduct problems. Gender by adoption status interactions were not significant. However, female adopted participants had higher levels of conduct problems than female non-adopted participants, whereas male adopted and non-adopted participants had similar levels of conduct problems. In the overall sample, differences between adopted and matched control participants on all conduct problem measures were nonsignificant. 相似文献
54.
This paper aims to examine the mediating effect of problem‐solving ability and information support on the relationship between acculturative stress and marriage satisfaction of married migrant women. To this end, the research model was established on the basis of the stress‐coping theories and resource model, and existing relevant research, and the mediating effect was verified through a structural equation. The subjects were married migrant women living in Busan and Gyeongsangnam‐do. The data from 307 respondents to questionnaires was used for analysis. In accordance with the analysis, the goodness‐of‐fit of the measurement model and structure model was significant. Moreover, problem‐solving ability had a mediating effect on the relationship between acculturative stress and marriage satisfaction. However, information support had no mediated effect on the relationship between acculturative stress and marriage satisfaction. This paper suggests practical implications of improving marriage satisfaction of migrant women on the basis of the analysis results. 相似文献
55.
56.
Combining spiral of silence theory with the situational theory of problem solving, this study explores the extent to which publics differ in their willingness to express their opinions in hostile social situations. Based on analysis of a survey among 369 college students about their willingness to express opinions on 2 controversial topics (gun possession and climate change), 3 key findings emerge: (a) Fear of isolation suppresses people's willingness to express their opinions in public; (b) active publics are more likely than other types of publics to express their opinions; and (c) there is no interaction effect between fear of isolation and types of publics. In addition to several theoretical contributions, the findings provide public relations practitioners with a model for predicting which types of publics would be more or less likely to express their opinion. 相似文献
57.
When firms invest in a shared supplier, one key concern is whether the invested capacity will be used for a competitor. In practice, this concern is addressed by restricting the use of the capacity. We consider what happens when two competing firms invest in a shared supplier. We consider two scenarios that differ in how capacity is used: exclusive capacity and first‐priority capacity. We model firms' investment and production decisions, and analyze the equilibrium outcomes in terms of the number of investing firms and capacity levels for each scenario; realized capacity is a stochastic function of investment levels. We also identify conditions under which the spillover effect occurs, where one firm taps into the other firm's invested capacity. Although the spillover supposedly intensifies competition, it actually discourages firms' investment. We also characterize the firms' and supplier's preference about the capacity type. While the non‐investing firm always prefers spillovers from the first‐priority capacity, the investing firm does not always want to shut off the other firm's access to its leftover capacity, especially when allowing spillover induces the other firm not to invest. The supplier's preference depends on the trade‐off between over‐investment and flexibility. 相似文献
58.
Gillian Stevens Kinam Jin Hyun Jong Song 《International migration (Geneva, Switzerland)》2006,44(1):167-180
LA MIGRATION DE COURTED URÉE ET L'ACQUISITION D'UNE LANGUE D'ENVERGURE MONDIALE
L'anglais s'impose toujours plus comme langue de communication mondiale. Pourtant, on connaît mal les mécanismes par lesquels il s'impose de plus en plus comme seconde langue dans des populations en grande partie monolingues, et on en mesure mal également les conséquences immédiates. Dans cette étude, nous nous intéressons plus particulièrement à un cas particulier: l'acquisition de l'anglais seconde langue par les Coréens. Nous examinons brièvement la place qu'occupe la langue anglaise en Corée et le poids des mesures d'incitation déployées dans ce pays pour l'acquisition de l'anglais. Sur la base d'analyses empiriques, nous tirons la conclusion que les Coréens appliquent à l'acquisition d'une langue d'envergure mondiale une stratégie transnationale: la migration de courte durée dans des pays où la langue anglaise domine. Pour conclure, nous examinons encore quelques-unes des implications potentielles de ces mouvements et des nombreuses voies ouvertes à la recherche. 相似文献
L'anglais s'impose toujours plus comme langue de communication mondiale. Pourtant, on connaît mal les mécanismes par lesquels il s'impose de plus en plus comme seconde langue dans des populations en grande partie monolingues, et on en mesure mal également les conséquences immédiates. Dans cette étude, nous nous intéressons plus particulièrement à un cas particulier: l'acquisition de l'anglais seconde langue par les Coréens. Nous examinons brièvement la place qu'occupe la langue anglaise en Corée et le poids des mesures d'incitation déployées dans ce pays pour l'acquisition de l'anglais. Sur la base d'analyses empiriques, nous tirons la conclusion que les Coréens appliquent à l'acquisition d'une langue d'envergure mondiale une stratégie transnationale: la migration de courte durée dans des pays où la langue anglaise domine. Pour conclure, nous examinons encore quelques-unes des implications potentielles de ces mouvements et des nombreuses voies ouvertes à la recherche. 相似文献
59.
Eun Min Hyun Jean W. Bauer M. Janice Hogan 《Journal of Family and Economic Issues》1993,14(3):215-236
Rural families have experienced rapid changes in their social and economic environment in the past few decades. How do rural husbands and wives perceive the adequacy of their resources in the face of economic pressures? Is there a relationship between their perception of resource adequacy and their marital satisfaction? These questions are explored using data from a random sample of 205 couples living in rural Minnesota. Age and Locus of Control are predictors of Perceived Resource Adequacy for both husbands and wives; employment is a predictor of Perceived Resource Adequacy for wives; and Money Management is negatively related to Perceived Resource Adequacy for husbands. Cohesion is the only salient cause of Marital Satisfaction for husbands and wives. No reciprocal relationship is found between Perceived Resource Adequacy and Marital Satisfaction. Implications for theory, research, education, and counseling are discussed. 相似文献
60.
Hyun Suk Park 《统计学通讯:理论与方法》2013,42(19):3479-3496
From the view of a geometric approach, we consider the problem of density estimation on the m-dimensional unit sphere by using the kernel method. The definition of the kernel estimator is motivated from the concept of the exponential map. This article shows that the asymptotic behavior of the estimator contains a geometric quantity (the sectional curvature) on the unit sphere. This implies that the behavior depends on whether the sectional curvature is positive or negative. Using observed data on normals to the orbital planes of long-period comets, numerical examples on the two-dimensional unit sphere are given. 相似文献