首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   24264篇
  免费   159篇
  国内免费   2篇
  2022年   30篇
  2021年   42篇
  2020年   67篇
  2019年   88篇
  2018年   3561篇
  2017年   2912篇
  2016年   2335篇
  2015年   281篇
  2014年   202篇
  2013年   581篇
  2012年   760篇
  2011年   2570篇
  2010年   2598篇
  2009年   1579篇
  2008年   1840篇
  2007年   2331篇
  2006年   181篇
  2005年   327篇
  2004年   299篇
  2003年   232篇
  2002年   153篇
  2001年   88篇
  2000年   108篇
  1999年   82篇
  1998年   73篇
  1997年   56篇
  1996年   40篇
  1995年   37篇
  1994年   39篇
  1993年   42篇
  1992年   37篇
  1991年   29篇
  1990年   47篇
  1989年   25篇
  1988年   35篇
  1987年   29篇
  1986年   40篇
  1985年   41篇
  1984年   40篇
  1983年   40篇
  1982年   36篇
  1981年   34篇
  1980年   37篇
  1979年   32篇
  1978年   39篇
  1977年   26篇
  1976年   37篇
  1975年   39篇
  1974年   38篇
  1973年   28篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
941.
Recent research on Problematic Internet Use and Problematic Facebook Use (PIU and PFU) has focused on the idea that people who engage in PIU or PFU are more likely to present with mental health problems. The goal of the present study was to examine the contribution of positive mental health (PMH) to PIU and PFU among adolescents and young adults. A total of 1927 Italian adolescents and young adults participated in the study. Structural equation modeling showed that PMH is negatively linked to both PIU and PFU, indicating that PMH may be an important antecedent for both PIU and PFU among adolescents and young adults. In conclusion, dimensions of PMH may be taken into account by researchers and educational practitioners in preventing both PIU and PFU.  相似文献   
942.
I examine the relationship between economic position relative to local neighbors and life satisfaction in rural Bangladesh. In particular, I exploit a novel household level census of three villages that includes the geospatial coordinates of every household and a perception measure of economic position relative to neighbors. This allows for exploring the sensitivity of the aforementioned relationship to (1) different objective definitions of neighborhood, and (2) the type of positional measure used, objective or perceived. I find that a higher perceived position improves life satisfaction while objective position has no statistically significant effect. This difference stems from a very low correlation between the objective and perceived positional measures. The low correlation can be explained by individual specific heterogeneity in definitions of neighbor. However, observable socioeconomic and demographic variables cannot explain the difference.  相似文献   
943.
The present study investigated the association of age, gender, and family size with normative beliefs about aggression among South African adolescents from low-income areas. Adolescents (n = 229; mean age = 16 years; female = 61%) completed the Normative Beliefs about Aggression Scale. Step-wise regression analyses were conducted with age, gender, and family size as predictors of normative beliefs about aggression. Boys demonstrated greater endorsement of physical, non-physical, and relational aggression; as compared to girls. Living in an extended family was associated with less approval of aggression. Aggression reduction interventions with children from disadvantaged areas need to consider the role of gender and family-related factors.  相似文献   
944.
Examining how animals direct social learning during skill acquisition under natural conditions, generates data for examining hypotheses regarding how transmission biases influence cultural change in animal populations. We studied a population of macaques on Koram Island, Thailand, and examined model-based biases during interactions by unskilled individuals with tool-using group members. We first compared the prevalence of interactions (watching, obtaining food, object exploration) and proximity to tool users during interactions, in developing individuals (infants, juveniles) versus mature non-learners (adolescents, adults), to provide evidence that developing individuals are actively seeking information about tool use from social partners. All infants and juveniles, but only 49% of mature individuals carried out interacted with tool users. Macaques predominantly obtained food by scrounging or stealing, suggesting maximizing scrounging opportunities motivates interactions with tool users. However, while interactions by adults was limited to obtaining food, young macaques and particularly infants also watched tool users and explored objects, indicating additional interest in tool use itself. We then ran matrix correlations to identify interaction biases, and what attributes of tool users influenced these. Biases correlated with social affiliation, but macaques also preferentially targeted tool users that potentially increase scrounging and learning opportunities. Results suggest that social structure may constrain social learning, but the motivation to bias interactions towards tool users to maximize feeding opportunities may also socially modulate learning by facilitating close proximity to better tool users, and further interest in tool-use actions and materials, especially during development.  相似文献   
945.
This study aimed to empirically analyze the magnitude of discrimination within the South Korean labor market between immigrant and native women in light of different employment patterns. Using an extended version of the Oaxaca decomposition method, special analytical attention was paid to the heavy concentration of immigrant women in the informal sector of the labor market rather than the formal sector. The extensive data for the study came from the Korea National Survey of Multicultural Families and the 12th wave of the Korean Labor and Income Panel Study, both conducted in 2009. Overall, the results presented a strong case that immigrant women are more susceptible to discrimination than their native counterparts in terms of obtaining a secure job in the formal sector. After controlling for a range of individual characteristics, a significant proportion of this employment disparity remained unexplained, giving credence to the existence of systematic discrimination endemic in the labor market.  相似文献   
946.
The main purpose of this exploratory study is to work out and describe the labour migrant’s linguodidactic profile, to verify its didactic capacity of an instrument of pedagogic measurement of social, cognitive, ethnocultural, educational and other significant characteristics of migrants affecting the efficiency of the Russian language training courses. The interdisciplinary methodology of the research integrates principles and approaches of methods for teaching Russian as a foreign language, interdidactics, migration sociolology, culturology, anthropology and cognitive science. The Russian language training courses have a strong potential for linguocultural adaptation and integration of labour migrants because the language functions as a depository and translator of the hosting nation’s moral norms and values. The effectiveness of the Russian language training course depends upon the strict consideration of all significant characteristics of its addressees, i.e. labour migrants. These characteristics were identified and then integrated into the linguodidactic profile which was taken as a basis for the language training course. The didactic capacity of the linguodidactic profile was proved on the example of language teaching and testing of migrants from the Republic of Tajikistan, since foreigners from this country form the majority (47%) of labour immigration flows to the Russian Federation. The role and capacity of the linguodidactic profile in teaching Russian as a foreign language have been verified experimentally. The analyses and comparisons of the final examination results proved the efficiency of the training course worked out with consideration for the labour migrant’s typical linguodidactic profile and, consequently, its high didactic capacity.  相似文献   
947.
In recent years, as the need for global refugee assistance has increased, so have fears and concerns of the costs of refugee resettlement in Western nations. Now, seemingly more than ever, international security and regional development depend largely on the composition and distribution of the world population. In many Western nations, dispersal policies are specifically designed to manage the distribution of recently arrived refugees. Secondary migration presents a challenge to the goals of dispersal policies and raises questions regarding regional development, population pressures, job security, welfare dependency, and the future of global refugee assistance. We survey administrators and caseworkers in a series of qualitative interviews about their experiences with secondary migration. We conclude that the US refugee resettlement system is ill-equipped in handling the complications of secondary migration. These results lead us to reimagine a better strategy for achieving the goals of refugee resettlement.  相似文献   
948.
This article discusses the workplace experiences of second-generation Nigerian adults in the USA. Drawing on data from semi-structured interviews with 67 respondents, I show that second-generation Nigerians differ in whether they perceive racial discrimination in the workplace. There was an almost even split between subjects who felt they had been discriminated against because of their race and those who said they had not experienced anti-black discrimination. For those who felt they had been racially discriminated against at work, their experiences took very similar forms to those of African Americans, with many drawing analogies between their workplace experiences and those of African Americans and other blacks. But there was evidence of intra-black dynamics with some experiencing ethnic discrimination from African Americans and some enjoying an advantage over African Americans because they are children of black immigrants. I showcase two strategic responses found among respondents: minimizing ethnic difference and stepping up one’s game, which were used to negotiate racism and achieve economic mobility. This is consistent with the minority cultures of mobility thesis; that minority groups have cultures of mobility that foster upward social mobility, and it challenges segmented assimilation theory’s perception that black immigrant groups and their children lack tenacity or adaptive strategies.  相似文献   
949.
This small pilot study analyzed the experiences of female genital cutting (FGC) among West African immigrants in New York City from three West African countries (the Gambia, Guinea, and Mali) with FGC prevalence rates of 76, 97, and 89%, respectively, among girls and women aged 15 to 49 years. Nine women participated in two focus group sessions. In the first group, five female participants ranged in age from18–20, and in the second, four participants ranged in age from 31 to 44. Focus group data were analyzed using a grounded theory approach. Despite the small sample size, the findings of this exploratory study highlight important aspects of immigrant women’s experiences regarding FGC and indicate the need for further exploration. Participants drew from personal experiences to discuss FGC and their views of the practice. Salient themes that emerged included the secretive and violent nature of the practice, the primacy of matriarchal decision-makers, the fear among immigrant mothers that their children would be subjected to FGC without their consent, and health care encounters in the USA. The findings of this study are considered in light of their implications for research, service provision, and policy.  相似文献   
950.
This article explores Canadian immigration policies’ influence on immigrant and newcomer women’s vulnerability to intimate partner violence in Canada. Neoliberal policies’ influence on immigration policies and restructuring of the welfare state, the creation of structural conditions that increase immigrant and newcomer women’s vulnerability to intimate partner violence while restricting their access to services that can help them seek recourse from such abuse, are discussed. The underlying question raised and discussed in this article is whether cultural identity and distinctiveness could be used to rationalize exclusionary policies that are contrary to the ideals of multiculturalism in Canada.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号