全文获取类型
收费全文 | 354篇 |
免费 | 39篇 |
国内免费 | 92篇 |
专业分类
485篇 |
出版年
2023年 | 9篇 |
2022年 | 8篇 |
2021年 | 10篇 |
2020年 | 13篇 |
2019年 | 5篇 |
2018年 | 21篇 |
2017年 | 17篇 |
2016年 | 10篇 |
2015年 | 13篇 |
2014年 | 14篇 |
2013年 | 25篇 |
2012年 | 23篇 |
2011年 | 30篇 |
2010年 | 22篇 |
2009年 | 26篇 |
2008年 | 38篇 |
2007年 | 40篇 |
2006年 | 33篇 |
2005年 | 24篇 |
2004年 | 15篇 |
2003年 | 19篇 |
2002年 | 15篇 |
2001年 | 8篇 |
2000年 | 9篇 |
1999年 | 10篇 |
1998年 | 7篇 |
1997年 | 2篇 |
1996年 | 3篇 |
1995年 | 3篇 |
1990年 | 3篇 |
1989年 | 1篇 |
1988年 | 2篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1981年 | 1篇 |
1980年 | 1篇 |
1968年 | 1篇 |
排序方式: 共有485条查询结果,搜索用时 0 毫秒
131.
Mg–Sn-based alloys are considered as a promising precipitation-hardening system for applications at elevated temperatures, but the hardening effect is not satisfactory owing to sluggish nucleation and rapid coarsening of the major Mg2Sn lath precipitates. In this study, Cu and Al are added to a Mg–6Sn–1Mn base alloy. The age-hardening response and the microstructures of these modified alloys have been investigated and are compared to that of the base alloy. The additional elements are found to bring several beneficial effects to the alloys for applications at elevated temperatures. Firstly, a eutectic structure consisting of strong intermetallic phases, i.e. Mg2Cu in the Mg–6Sn–1Mn–2Cu alloy and Al0.93Cu1.07Mg in the Mg–6Sn–1Mn–2Cu–2Al alloy, remains stable along the grain boundaries after solution and ageing heat treatments. Secondly, the precipitate density has been increased significantly and the precipitate size has been refined remarkably during ageing at 200?°C. Moreover, the growth of the precipitates is inhibited remarkably during the over-ageing period. Therefore, the age-hardening response and over-ageing resistance are notably improved. 相似文献
132.
王充心理学思想新论——兼议中国古代心理学思想史研究方法 总被引:1,自引:0,他引:1
本文试图寻求一种新的研究模式,来探索王充的心理学思想。这个模式主要包括两个方法论原则,即:(一)置于思想群系的原则;(二)依据自身逻辑的原则。在这一研究模式引导下,作者发现“唯实唯验”是王充心理学思想的基点。并由此推论出(一)王充心理学思想的本质是“心理即力”;(二)其特征是“心理外显”,而这两者是分别体现在他的人论和心论的思想之中。 相似文献
133.
134.
Research suggests that social support moderates or “buffers” the impact of stress on the individual and thus indirectly affects
emotional well-being (Cohen and Wills, 1985). The present study sought to extend the “buffering hypothesis” to competitive
sport by examining the influence of perceived coach support on competitive state anxiety among young athletes (N = 270). Results from confirmatory factor analyses (CFA) substantiated the validity of the sport-modified Social Provisions
Scale (Russell and Cutrona, 1984; Ryska and Yin, 1994). Structural equation modeling analyses revealed a significant support-anxiety
effect in the high trait-anxious model only (r =-.27, p .05). The present results suggest that perceived coach support represents an important mediating factor in the sport stress
process among highly anxious athletes. 相似文献
135.
Initial evidence suggests that the employment of self-handicapping strategies has a beneficial effect on negative affective
states associated with the perceived threat of evaluative contexts (Harris & Snyder, 1986; Leary, 1986). The present study
sought to describe the type of self-handicapping behaviors demonstrated by youth athletes (N=238) as well as to assess the
stress-buffering role of athlete self-handicapping on indices of competitive state anxiety. Specifically, it was hypothesized
that among high trait-handicapping athletes, those who report a greater degree of performance-debilitating obstacles prior
to competition would demonstrate lowered cognitive and somatic state anxiety as well as greater state self-confidence than
nonhandicapping athletes. However, MANOVA results indicated that both high trait and situational self-handicappers demonstrate
elevated state anxiety immediately prior to competition. Results are discussed in relation to the possible role of state anxiety
as a salient self-handicapping strategy within competitive sport. 相似文献
136.
137.
Yingying Yin Shiyue Sun Lili Song Cancan Jin Yong Wang 《Asian Journal of Social Psychology》2023,26(2):219-237
Emotional labour strategies have a significant impact on job burnout. However, current research results are controversial and unclear. A meta-analysis was conducted to explore the relationship between emotional labour strategies (surface acting and deep acting) and job burnout. A total of 84 empirical studies that included 28,242 participants were selected. The meta-analysis of the relationships between job burnout and surface acting and deep acting included 84 and 75 independent samples respectively. The results show that surface acting had a positive association (r = 0.25) with job burnout, whereas deep acting (r = −0.27) had a negative association with job burnout. Occupational types and measures of emotional labour strategies moderated the relationship between emotional labour strategies and job burnout, but this relationship was not moderated by measures of job burnout. 相似文献
138.
Zhi Wang Xueying Tang Jingchen Liu Zhiliang Ying 《The British journal of mathematical and statistical psychology》2023,76(1):211-235
Response process data collected from human–computer interactive items contain detailed information about respondents' behavioural patterns and cognitive processes. Such data are valuable sources for analysing respondents' problem-solving strategies. However, the irregular data format and the complex structure make standard statistical tools difficult to apply. This article develops a computationally efficient method for exploratory analysis of such process data. The new approach segments a lengthy individual process into a sequence of short subprocesses to achieve complexity reduction, easy clustering and meaningful interpretation. Each subprocess is considered a subtask. The segmentation is based on sequential action predictability using a parsimonious predictive model combined with the Shannon entropy. Simulation studies are conducted to assess the performance of the new method. We use a case study of PIAAC 2012 to demonstrate how exploratory analysis for process data can be carried out with the new approach. 相似文献
139.
140.
农村重点高中学生学校人际关系状况的调查研究 总被引:2,自引:0,他引:2
采用《中学生师生关系测验问卷》和《中学生同学关系测验问卷》对随机选取的1120名苏北农村省级重点高中生进行测试。结果发现:绝大多数高中生的师生关系、同学关系是良好的和一般的,师生关系较差的只有6%左右,同学关系较差的却有20%左右;师生关系和同学关系都存在着显著的年级差异和性别差异。 相似文献