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   50732篇
  免费   1958篇
  国内免费   28篇
  2019年   639篇
  2018年   887篇
  2017年   953篇
  2016年   951篇
  2015年   715篇
  2014年   795篇
  2013年   3993篇
  2012年   1404篇
  2011年   1538篇
  2010年   974篇
  2009年   955篇
  2008年   1321篇
  2007年   1307篇
  2006年   1184篇
  2005年   1041篇
  2004年   960篇
  2003年   1001篇
  2002年   973篇
  2001年   1798篇
  2000年   1744篇
  1999年   1272篇
  1998年   560篇
  1997年   475篇
  1996年   488篇
  1992年   1077篇
  1991年   1045篇
  1990年   996篇
  1989年   939篇
  1988年   928篇
  1987年   893篇
  1986年   871篇
  1985年   940篇
  1984年   742篇
  1983年   614篇
  1982年   472篇
  1981年   478篇
  1979年   769篇
  1978年   564篇
  1977年   508篇
  1976年   486篇
  1975年   653篇
  1974年   737篇
  1973年   794篇
  1972年   637篇
  1971年   577篇
  1970年   553篇
  1969年   548篇
  1968年   691篇
  1967年   617篇
  1966年   636篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
261.
Legal and nonlegal factors influencing the civil commitment recommendations of psychologists and psychiatrists separately and as a whole were investigated using an experimental design. One hundred and seventy-six psychologists and psychiatrists made recommendations for or against commitment for a series of clinical vignettes wherein the five facets of commitment criterion, legal committability, clinical treatability, alternative resources and presence of psychosis were systematically varied. Results revealed that all facets contributed independently and in combination to the commitment decisions of participants as a whole. It was concluded that mental health professionals may utilize a variety of types of information, beyond the relevant legal criteria, in making actual decisions to initiate civil commitments.  相似文献   
262.
263.
A software package called PAST (Programmer Assessment Software Tools) is described. PAST was designed as a research and diagnostic tool to analyze how programmers develop and test program code. PAST uses line changes between successive compiles to estimate a programmer’s cognitive processing. Line changes are highlighted and graphically presented between any two versions or compiles. Summary graphs and statistics across all versions also are provided. Applications of PAST for expanding our understanding of programming and applying it to research, teaching, and learning are discussed.  相似文献   
264.
A computer-controlled system that detects spontaneous activity (locomotion and rearing) and diurnal activity rhythms in small animals is described. Automatic recording of subtotals during test periods provides data about habituation (nonassociative learning). The system is relatively inexpensive to construct. Fabricated from highly reliable circuit components, it provides replicable measures that enable comparisons between different experimental treatments to be made using parametric statistics.  相似文献   
265.
A technical issue in auditory spatial attention research is how best to provide low-cost, accurate control of the frequency, duration, and location of acoustic signals. Three solutions to the problem are compared: use of the internal oscillator of the Apple lIe, use of a Mountain A/D+D/A card, and use of an external oscillator chip. The unique advantages and drawbacks of each system are discussed. All share some common problems of external speaker interface, timing control, and interface with the software. Hardware and software solutions implemented on the Apple-Psych system are discussed, along with data that demonstrate the precision control achieved with the system.  相似文献   
266.
Difficulties with the Microsoft BASIC function for generating random numbers (RND) are cited and new problems reported. Fixes are suggested that allow use of some of the speed of the original function and that produce greatly improved pseudorandom numbers. A published generator is combined with the RND function as a compromise solution.  相似文献   
267.
Members of the Society for Computers in Psychology responded to a survey concerning their programming practices and language use. The results reveal current hardware and software use; relationships among computer science training, task, and language choice and usage; and areas in which attention to some structured programming principles might improve the code that psychologists write.  相似文献   
268.
269.
270.
Maternal handling and motor development: an intracultural study   总被引:1,自引:0,他引:1  
Citing a distinction between informal and formal routines used by mothers in handling their infants, we examined formal handling routines, in which the caregiver acts in a pedagogical manner; these routines are widespread in many non-Western countries. We hypothesised that formal handling serves to facilitate gross motor development during early infancy. To examine this hypothesis, the effects of a Jamaican formal handling routine on a broad range of developmental outcomes was examined. Results showed that the effects were specific to early gross motor development and in particular to postural control along the vertical axis of the body. Information is also provided on other aspects of Jamaican child care. It seems that the handling routine forms part of a folk (developmental) medicine system and may serve not only to promote child health but also as a sort of developmental neurological examination.  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