全文获取类型
收费全文 | 3090篇 |
免费 | 1007篇 |
国内免费 | 34篇 |
出版年
2018年 | 34篇 |
2017年 | 31篇 |
2013年 | 209篇 |
2012年 | 64篇 |
2011年 | 88篇 |
2010年 | 118篇 |
2009年 | 203篇 |
2008年 | 102篇 |
2007年 | 130篇 |
2006年 | 83篇 |
2005年 | 97篇 |
2004年 | 123篇 |
2003年 | 116篇 |
2002年 | 91篇 |
2001年 | 136篇 |
2000年 | 67篇 |
1999年 | 100篇 |
1998年 | 89篇 |
1997年 | 67篇 |
1996年 | 106篇 |
1995年 | 94篇 |
1994年 | 96篇 |
1993年 | 85篇 |
1992年 | 108篇 |
1991年 | 97篇 |
1990年 | 95篇 |
1989年 | 89篇 |
1988年 | 74篇 |
1987年 | 61篇 |
1986年 | 54篇 |
1985年 | 49篇 |
1984年 | 49篇 |
1982年 | 52篇 |
1981年 | 43篇 |
1980年 | 44篇 |
1979年 | 41篇 |
1977年 | 31篇 |
1973年 | 39篇 |
1972年 | 44篇 |
1971年 | 44篇 |
1970年 | 29篇 |
1969年 | 32篇 |
1968年 | 58篇 |
1967年 | 38篇 |
1966年 | 48篇 |
1965年 | 41篇 |
1964年 | 81篇 |
1963年 | 74篇 |
1962年 | 49篇 |
1961年 | 40篇 |
排序方式: 共有4131条查询结果,搜索用时 15 毫秒
131.
Groups of non-computer scientists were tested to evaluate the potential of an as yet non-existent interactive terminal with
a screen diagonal of one meter. A simulated large image terminal provided limited realistic interactions using software developed
to give close proximity to the predicted visual effect. Subjective responses from 101 subjects were elicited from a questionnaire
designed to evaluate specific aspects of the “terminal” in use. From this data, two types of screen (lenticular and plain)
and two types of interaction devices (touch and remote pointer) were analyzed experimentally using a two-way factorial design.
Potential end-users provided positive feedback concerning future use of the Large Image Terminal. Building a realistic mock-up
revealed screen contaminations which would not have been discovered until a much later stage. Although statistical analysis
of screen evaluations was equivocal, the questionnaire was sufficiently penetrating to separate the positive and negative
features. This methodology was invaluable in guiding the design process.
Copies of the questionnaire may be obtained from the authors at the Heriot-Watt address. 相似文献
132.
133.
INFANTS' PERCEPTION OF PHRASE STRUCTURE IN MUSIC 总被引:1,自引:0,他引:1
134.
Erratum
Overt integrity tests versus personality-based measures of delinquency: An empirical comparis 相似文献135.
Carol Taylor 《Theoretical medicine and bioethics》1990,11(2):111-124
In this paper a case is used to demonstrate how ethical analysis enables health care professionals, patients and family members to make treatment decisions which ensure that medical technologies are used in the overall best interests of the patient. The claim is made and defended that ethical analysis can secure four beneficial outcomes when medical technologies are employed: (1) not allowing any medical technologies to be employed until the appropriate decision makers are identified and consulted; (2) insisting that medical technologies be employed not merely to promote the medical interests of the patient but rather on the basis of their ability to contribute to the overall well-being of the patient; (3) challenging caregivers to reflect on the dynamic interplay between their conscious and unconscious values and consequent determinations of what is in the patient's best interests; and (4) providing a justification for selected interventions which makes possible rational dialogue between caregivers espousing different viewpoints about treatment options. 相似文献
136.
Carol A. Fowler Catherine T. Best Gerald W. Mcroberts 《Attention, perception & psychophysics》1990,48(6):559-570
Phonetic segments are coarticulated in speech. Accordingly, the articulatory and acoustic properties of the speech signal during the time frame traditionally identified with a given phoneme are highly context-sensitive. For example, due to carryover coarticulation, the front tongue-tip position for HI results in more fronted tongue-body contact for a /g/ preceded by /l/ than for a /g/ preceded by /r/. Perception by mature listeners shows a complementary sensitivity—when a synthetic /da/-/ga/ continuum is preceded by either /al/ or /ar/, adults hear more /g/s following HI rather than Irl. That is, some of the fronting information in the temporal domain of the stop is perceptually attributed to /l/ (Mann, 1980). We replicated this finding and extended it to a signaldetection test of discrimination with adults, using triads of disyllables. Three equidistant items from a /da/-/ga/ continuum were used preceded by /al/ and /ar/. In the identification test, adults had identified item ga5 as “ga”, and dal as “da”, following both /al/ and /ar/, whereas they identified the crucial item d/ga3 predominantly as “ga” after /al/ but as “da” after /ar/. In the discrimination test, they discriminated d/ga3 from dal preceded by /al/ but not /ar/; compatibly, they discriminated d/ga3 readily from ga5 preceded by /ar/ but poorly preceded by /al/. We obtained similar results with 4-month-old infants. Following habituation to either ald/ga3 or ard/ga3, infants heard either the corresponding ga5 or dal disyllable. As predicted, the infants discrimi-nated d/ga3 from dal following /al/ but not /ar/; conversely, they discriminated d/ga3 from ga5 following /ar/ but not /al/. The results suggest that prelinguistic infants disentangle consonant-consonant coarticulatory influences in speech in an adult-like fashion. 相似文献
137.
Romanians suffered incredible deprivations of every sort during the decades of Communist dictatorship. Most of the country’s
1,000 psychiatrists, and most of their patients, were victimized by the political system. A few psychiatrists actively engaged
in practices amounting to torture. Many, however, became willing or unwilling participants in the political abuse of their
profession.
Such political abuses were fostered by abusive legislation and abusive law enforcement by the secret police. Abuses included:
mass detentions in psychiatric hospitals of dissidents and political undesirables; abusive interpretation of the laws in detaining
persons not suffering from mental illness; false, politically motivated diagnoses and treatment; and detention in secret facilities.
While there are honest efforts to come to grips with the past, to compensate victims of psychiatric abuse, and to institute
proceedings against abusers, there is also much resistance to reform. Reform-minded Romanian psychiatrists deserve the support
of their western colleagues in the effort to restore Romanian psychiatry. In particular, professional colleagues all over
the world are asked to comment on the draft law currently pending before the Romanian parliament, which is intended to restore
the rule of law to the practice of psychiatry in Romania.
Report of a consultative mission to Bucharest, on behalf of the Geneva Initiave on Psychiatry, 7 June to 12 June 1992, by
Nanci Adler, Historian-Sovietologist, Geneva Initiative on Psychiatry, Amsterdam, The Netherlands; G.O.W. Mueller, Distinguished
Professor of Criminal Justice, Rutgers — The State University of New Jersey, U.S.A.; Mohammed Ayat, Professor of Criminology
and Penal Law, Université de Fes, Faculté des Sciences Juridiques, Economiques et Sociales, FEs, Morocco.
The Geneva Initiative on Psychiatry is a nongovernmental, nonprofit organization, dedicated to the introduction and preservation
of ethical practices in the psychiatric profession, in accordance with medical ethics, the Universal Declaration of Human
Rights, and U.N. standards and guidelines. Headquartered in Amsterdam, the organization is currently providing technical and
financial assistance to the newly established free, independent, democratic psychiatric associations in Russia, Ukraine, Romania,
and other countries. The General Secretary of the organization is Robert van Voren; the board is composed of professionals
from some twenty countries.
This article was based on meetings at governmental and parliamentary offices, nongovernmental organizations, and embassies
as well psychiatric institutions with, among others, the following persons: Dr. Lucian Alexandrescu, V-P Radu Ciuceanu, Mr.
Comsa, Proc. Gen’l. Ulpiu Cereceanu, Mr. Nistor Cristea, Mr. Dinu Ianculescu, Prof. Dr. George Ionescu, Miss Cristina Luzoscu,
Dr. Zaharia Nicolae, Mr. Iancu Petrescu, Dr. Dan Prelipcianu, Min. Mircea Ionescu-Quintus, Dr. Aurel Romila, Av. Nicolae Stefanescu-Draganesti,
Dir. Dr. Tomescu, Dr. Alexandru Trifan, Dr. Valeriu Tuculescu, and numerous victims, diplomats, and Romanian citizens. 相似文献
138.
Depression in some patients with spinal cord injuries may be clinically significant and, when present, should be treated to
decrease morbidity including decreased physical functioning. Depression associated with spinal cord injury (SCI) may be misevaluated,
due to (1) nonspecific multifactorial production of depression symptoms and (2) SCI-specific decrease in somatic sensory central
nervous system input. The Somatic Suppression Hypothesis suggests that SCI patients have difficulty experiencing any intense
emotion because of suppression of physiological arousal. In addition, cognitive processes that may reduce depression in SCI
patients include: (1) attribution of somatic symptoms of depression to medical (biological) causes, (2) realistic, positive
expectations for physical improvement, and (3) the perception that the disability of the SCI is only minimally related to
the patient’s self-care after complete evaluation. Health personnel should accept lack of depression in SCI, and should encourage
positive realistic expectations of recovery. 相似文献
139.
Increases in self-attention as a function of decreases in the relative size of one’s subgroup in a heterogeneous group context
have been shown to result in increased regulation of behavior toward social (normative) standards for behavior. The present
study demonstrated increased regulation of behavior toward a personal standard for behavior as a function of variations in
group composition. One hundred twenty-five subjects individually completed the Creativity subscale of Scott’s Personal Value
Scale assessing attitudes toward originality. They then completed a word-association task in groups ranging in size from 2
to 8. Originality of word-associations was determined by reference to previously established word-association norms and norms
based on frequency of responses given in the present study. Results indicate that originality in responses increase as the
relative size of one’s own subgroup decreases (indexing increases in self-attention) for subjects who value originality. Discussion
centers on the distinction between experimentally manipulated public and private self-attention and standards that are adopted
for behavioral self-regulation.
Portions of this study were presented at the annual meeting of the Eastern Psychological Association, New York, April 1991. 相似文献
140.
The disambiguation of threat/neutral homophones was investigated in high- and low-trait anxiety subjects who had been exposed
to either a positive or a negative mood manipulation procedure. Subjects were required first to spell each auditorily presented
word and second, to generate and speak a sentence using the word. Difference indices were calculated for the spelling and
the sentence usage data, i.e. the number of threat minus neutral interpretations. Examination of these indices revealed that
subjects exposed to the negative mood manipulation procedure produced relatively more threat than neutral interpretations
(for both spelling and sentence usage) than did subjects exposed to the positive mood manipulation procedure. Multiple regression
analyses revealed that both the trait anxiety and mood manipulation variables contributed significantly to the prediction
of the difference index on the spelling task. In the analysis of the use of homophones in sentences, only the mood manipulation
variable contributed significantly to the prediction of the difference index on the sentence usage task. 相似文献