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   310篇
  免费   16篇
  2020年   4篇
  2019年   6篇
  2018年   4篇
  2017年   13篇
  2016年   5篇
  2015年   6篇
  2014年   4篇
  2013年   28篇
  2012年   6篇
  2011年   11篇
  2010年   10篇
  2009年   8篇
  2008年   8篇
  2007年   15篇
  2006年   11篇
  2005年   6篇
  2004年   9篇
  2003年   15篇
  2002年   3篇
  2001年   10篇
  1999年   7篇
  1998年   3篇
  1996年   3篇
  1993年   3篇
  1992年   3篇
  1991年   5篇
  1989年   4篇
  1988年   5篇
  1985年   3篇
  1980年   2篇
  1979年   3篇
  1978年   2篇
  1977年   3篇
  1975年   8篇
  1974年   7篇
  1973年   3篇
  1972年   3篇
  1971年   2篇
  1970年   5篇
  1969年   3篇
  1968年   4篇
  1967年   2篇
  1966年   3篇
  1965年   2篇
  1938年   4篇
  1937年   2篇
  1935年   8篇
  1934年   2篇
  1931年   2篇
  1930年   2篇
排序方式: 共有326条查询结果,搜索用时 31 毫秒
201.
A Christian approach to the issues that constitute bioethics is inevitable for us who cherish the truth of historic, creedal, trinitarian Christianity. Scripture teaches and the Greek and Latin Church Fathers as well as the Reformers aver that man, created in the image of God, has an inherent, if vestigial, sense of right and wrong and a conscience however marred by the fall and by rebellion. We must believe that we share this most basic ecumenism with all humanity, not because of rational observation and analysis of nature, but because Scripture reveals it. We who are convinced of the truth of historic, creedal, trinitarian Christianity have a high view of Scripture and hold it to be infallible and utterly trustworthy irrespective of the importance we assign to our specific post-biblical traditional distinctives. This is a narrower but much more vital ecumenism than the first. Faithful adherence to Scripture inevitably manifests itself in remarkably similar priorities and values, often, lamentably, not because of, but in spite of, ourselves.  相似文献   
202.
A bird’s eye view of the role of nontrivial dynamical phenomena in physiological systems is presented. Many levels in the physiological hierarchy are affected. It appears that physiology has a particularly high affinity to chaos. The old central place of physiology in the circle of sciences can perhaps be regained if the two disciplines join resources. Even physics may turn out to be dependent on the chaotic micro dynamics of the brain.  相似文献   
203.
An exploration environment and tutoring strategies were developed for the first few hours of learning the programming language LISP. In this environment, the amount of exploratory and receptive learning can be systematically manipulated. In an experimental study with three different learning conditions, learning in a basic exploration environment (without an automated tutor) was compared to learning with an automated tutor that provided help rather selectively, and with an automated tutor that provided help whenever possible. The results showed that the selective tutor condition was most effective: The students in this condition took the least time in acquiring knowledge and solving the criterion test tasks, while solving equal numbers of the tasks correctly.  相似文献   
204.
Previous findings indicate that continuous low-frequency noises at moderate sound-pressure levels do not produce decrements in vigilance performance. Such noises are commonly found in urban environments, however; and it is important to explore their effects carefully. This study employed 27 human males in a numeric monitoring task to evaluate the effects of low-frequency (11.5 to 350 Hz) noise at moderate sound-pressure levels (80 db). More numeric signals were missed during noise than during control runs. The effect was small but statistically reliable (P smaller than .033), in disagreement with previous research. The possible environmental impact of these findings is discussed.  相似文献   
205.
Statistic methods are used to investigate the discrepancy in the occurrence of suicides and attempted suicides in the urban and rural districts of Brandenburg. Although the socilolgical structures of the rural districts are much like those of the town, there exist obvious discrepancies in the incidence rate. The suicide rate is paradoxically in contrast with what may be expected when one has read the literature. The rate is higher in the rural districts than in the town. The possible causes of this phenomenon are discussed indetail. It is considered recommendable for the planning of preventive measures that not only the figures for actual suicides be taken as a representative rate and starting point, but also the figures for suicidal acts (suicides and attempted suicides).  相似文献   
206.
The methods of nuclear medicine and electro-encephalography allow, in combination, in almost every case the answer to the question of the cerebral tumour relapse. Our evaluation confirms the discovery of the greater sensitivity of the isotopic methods with relapses of glioblastomas, while relapses of meningiomas, astrocytomas, oligodendrogliomas and spongioblastomas can be recognized more frequently only by electro-encephalographic methods. The value of angiography is limited in cases of cerebral tumour relapses without pathological vascularisation, since the swelling can spread in the resection cavity without retroaction on the surrounding areas. For this reason vascular displacement (an only be observed very late on. Clinical judgement is furthermore complicated by the fact that after the removal of the primary tumour, often no reposition of the arteries ensues. After our exainations, a negative angiographic condition can be rule out a diagnosis of a relapse which has been established by electro-encephaolographic and isotopic methods.  相似文献   
207.
Protokolls?tze     
Otto Neurath 《Erkenntnis》1932,3(1):204-214
Ohne Zusammenfassung Bemerkungen zu RudolfCarnaps Auffatz.Die phyfikalifche Sprache als Univerfalfprache der Wiffenfchaft. „Erkenntnis” 1932, S. 432. Da mit Carnap weitgehende übereinftimmung befteht, wird an feine Terminologie angeknüpft. Um nicht fchon Gefagtes zu wiederholen, fei verwiefen auf: OttoNeurath, Phyfikalismus. „Scientia” 1931, S. 297. OttoNeurath, Soziologie im Phyfikalismus. „Erkenntnis” 1932, S. 393.  相似文献   
208.
209.
A motion picture test of counselor perceptions of counseling interview segments was developed in order to analyze change in trainee perceptions during a practicum, and to explore the relationship between counselor perceptions of others and counseling competence. Cross-validation results from a group of 30 NDEA Counseling and Guidance Institute trainees demonstrated a significant relationship between post-practicum counseling competence and both pre-practicum and post-practicum test scores. The test appears to be relatively independent of other commonly used selection criteria.  相似文献   
210.
Neuropsychological studies suggest that good long-term language outcome is possible following extensive early left-hemisphere damage. We explored the brain organization for language in children with early unilateral lesion, using [15O]-water PET. In 12 patients with left lesion (LL) and 9 patients with right lesion (RL), cerebral blood flow changes during listening to sentences and repetition were studied. A rightward shift of language activations in the LL group was found in perisylvian areas and multiple other, mostly temporo-parietal, regions. The hypothesis of intrahemispheric reorganization in the LL group found only limited support. The number of activated regions was overall greater in the RL group. Unexpected findings included a stronger subcortical and cerebellar language involvement in the RL group. We suggest that (a) early left lesion is associated with enhanced language participation of the right hemisphere in and beyond the classical language areas, and (b) postlesional effects are in part additive (recruitment of noncanonical areas), in part subtractive (functional depression in areas normally involved in language).  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