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   1073篇
  免费   150篇
  国内免费   274篇
  2024年   3篇
  2023年   28篇
  2022年   43篇
  2021年   30篇
  2020年   52篇
  2019年   53篇
  2018年   68篇
  2017年   46篇
  2016年   65篇
  2015年   41篇
  2014年   71篇
  2013年   142篇
  2012年   47篇
  2011年   84篇
  2010年   38篇
  2009年   44篇
  2008年   84篇
  2007年   117篇
  2006年   82篇
  2005年   58篇
  2004年   52篇
  2003年   51篇
  2002年   38篇
  2001年   26篇
  2000年   23篇
  1999年   19篇
  1998年   18篇
  1997年   13篇
  1996年   15篇
  1995年   15篇
  1994年   5篇
  1993年   4篇
  1992年   9篇
  1991年   1篇
  1990年   1篇
  1988年   2篇
  1986年   2篇
  1982年   1篇
  1981年   1篇
  1980年   1篇
  1979年   1篇
  1978年   1篇
  1977年   1篇
  1975年   1篇
排序方式: 共有1497条查询结果,搜索用时 281 毫秒
71.
South Africa has one of the highest HIV prevalences in the world, and compared with other sectors of the national economy, the construction industry is disproportionately adversely affected. Using data collected nationally from more than 57,000 construction workers, HIV infection among South African construction workers was estimated, together with an assessment of the association between worker HIV serostatus and worker characteristics of gender, age, nature of employment, occupation, and HIV testing history. The HIV infection of construction workers was estimated to be lower than that found in a smaller 2008 sample. All worker characteristics are significantly associated with HIV serostatus. In terms of most at-risk categories: females are more at risk of HIV infection than males; workers in the 30–49 year old age group are more at risk than other age groups; workers employed on a less permanent basis are more at risk; as are workers not having recently tested for HIV. Among occupations in the construction industry, general workers, artisans, and operator/drivers are those most at risk. Besides yielding more up-to-date estimated infection statistics, this research also identifies vulnerable sub-groups as valuable pointers for more targeted workplace interventions by construction firms.  相似文献   
72.
The study investigates the prevalence and correlates of metabolic syndrome (MS) among Hong Kong Chinese adults. Random cluster sampling design and International Diabetes Federation (IDF) MS criteria were adopted. Totally 737 adults participated in questionnaire survey and received waist circumference (WC) measurement. Among them 335 showed central obesity (WC > 80 and 85 cm for women and men respectively). Subsequently 229 accepted blood test. Totally 71 participants met MS criteria, suggesting an overall prevalence of 14.1%. Both central obesity and MS increase sharply with age. Chi-square/ANOVA analyses revealed significant positive associations between central obesity with: being male, marital status being married/cohabit, lower education level, occupation as managers or housewives, and alcohol consumption. For MS, the significant positive correlates were: lower education level, occupation as service workers or housewives, lower income level, and alcohol consumption. After controlling for age, binary logistic regression analyses suggested the significant risk factors for central obesity were being male (OR = 1.4), married/cohabit (OR = 1.8), longer working hours (OR = 1.5), eating less vegetables (OR = 1.5), and alcohol consumption (OR = 1.8). For MS, only alcohol consumption appeared to be a significant risk factor (OR = 2.3). Multivariate binary logistic regressions also supported that age group and alcohol consumption were significant predictors of MS. To conclude, adopting randomized cluster sampling and IDF criteria, the study revealed a prevalence rate of MS at 14.1%. Alcohol consumption appears to be the strongest risk factor of MS, which however needs further investigation.  相似文献   
73.
The term 1.5 generation has broadly been used to refer to individuals who migrate in childhood or adolescence. It has served as a distinction from the first generation, who voluntarily migrated in adulthood, and from the second generation, born in the host society. The experiences and cultural identities of 1.5-generation children have generally been described as located in between two worlds. However, the present qualitative study conducted among 1.5-generation Chinese living in Spain does not support these views. It shows that some children feel unequivocally Chinese, while the experiences of others reflect much more nuance and complexity that resists categorization. A dialogical perspective is proposed as a multilayered and intersectional approach from which to explore these identities.  相似文献   
74.
Rui Dong 《Ethics & behavior》2018,28(2):154-175
This study focuses on the reliability and validation of the Chinese version of the Moral Attentiveness Scale. Factor analysis confirmed that the scale includes two factors: perceptual moral attentiveness and reflective moral attentiveness. Moral attentiveness is negatively correlated with normlessness and positively associated with internalization and symbolization, moral identity, and other academic dishonesty behaviors. Reflective moral attentiveness moderated the relationship between formalism and unethical decision making. All results showed that the Chinese version of the Moral Attentiveness Scale has satisfactory psychometric properties and is a valid and reliable measurement of moral attentiveness in the Chinese population.  相似文献   
75.
贾玲  雷江华  宫慧娜  张奋  陈影 《心理科学》2018,(5):1077-1083
本研究探讨了聋生在加工手语词过程中不同编码方式和指拼特征的影响。实验1采用指拼类手语词和手势类手语词考察了指拼有无对手语词编码方式的影响。实验2则采用不同特征的指拼类手语词,深入考察指拼位置、指拼形式对手语词编码方式的影响。结果表明,聋生较语音编码更擅长使用指拼编码加工手语词;指拼与手势的加工存在显著差异,指拼在聋生手语词加工中起到了促进作用;指拼位置与指拼形式共同作用于手语词的加工过程。  相似文献   
76.
采用追踪研究考察了124名小学一年级儿童的阅读流畅性对其二、三年级阅读理解的影响。结果发现,在控制了性别、家庭社会经济地位、推理能力、汉字识别、口语词汇及多种阅读相关认知技能之后,儿童一年级时的字词流畅性可以预期其二、三年级时的阅读理解水平,句子流畅性对二年级时阅读理解的变异有独特解释作用,但对三年级时阅读理解的变异没有显著的解释作用。相对于句子流畅性,字词流畅性在小学低年级阶段对阅读理解的贡献更大。  相似文献   
77.
William L. Atkins 《Zygon》2018,53(2):392-408
As science and religion researchers begin to engage questions of mental health, mindfulness may prove to be a fruitful area of investigation. However, quantifying the physical effects of mindfulness on the brain is difficult because mindfulness deals with the problem of mental and physical interaction or, the mind/body problem. One system of understanding which may aid science and religion scholars in the pursuit of mindfulness is traditional Chinese medicine (TCM). Within TCM, heart Qi manages the body's present connection to time and space. If the “being in the moment” is disrupted, then the heart Qi is blocked and mental illness or various neurological disorders occur. Succinctly, within TCM, mindfulness is understood as a nonphysical phenomenon (Qi) which directly affects physical systems, resulting in empirical data. This is tracked and treated through the TCM understanding of Qi. The TCM view of Qi in mental health may therefore provide a helpful new paradigm to investigations concerning mindfulness and the human brain.  相似文献   
78.
Gunby, Rapp, Bottoni, Marchese and Wu (2017) taught three children with autism spectrum disorder to follow an instructor's gaze shift to select a specific item; however, Gunby et al. used different types of prompts with each participant. To address this limitation, we used a progressive training model for increasing gaze shift for three children with autism spectrum disorder. Results show that each participant learned to follow an adult's shift in gaze to make a correct selection. In addition, two participants displayed the skill in response to a parent's gaze shift and with only social consequences; however, the third participant required verbal instruction and tangible reinforcement to demonstrate the skill outside of training sessions.  相似文献   
79.
Our memories are quite fragile. We sometimes recognize something unseen as something seen before. This error often causes serious problems, such as the misidentification of composite faces in a criminal investigation. In such a scene, people occasionally claim to have seen a face that is actually a composite face consisting of facial parts separately seen before; this error is called the memory conjunction error. Although the likelihood of the memory conjunction error increases over time, previous studies suggest that it could be suppressed by the number of response options, which are expected to affect the criterion for the “Old” response. Our results show that the presence of three response options reduced the memory conjunction error. Additionally, providing information about the existence of composite faces affected the sensitivity for detecting old faces, whereas three response options affected the criterion. This study might contribute to the improvement of procedures for eyewitness testimony.  相似文献   
80.
本研究设计了两种基于汉语全拼输入的提示性软键盘:加粗加黑和颜色提示,并通过实证性研究验证了这两种提示性软键盘对汉字输入绩效的影响。结果表明,两种提示性软键盘均优于非提示性软键盘,在打字速度、使用方便程度、喜爱程度和总体评价上均更好,加粗加黑提示性软键盘还显著提升了输入正确率。该结果为基于汉字输入的提示性软键盘的研发和使用提供了科学依据和数据支持,也将为相关键盘的投入市场做出贡献。  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