全文获取类型
收费全文 | 5288篇 |
免费 | 27篇 |
国内免费 | 2篇 |
出版年
2019年 | 14篇 |
2018年 | 134篇 |
2017年 | 117篇 |
2016年 | 199篇 |
2015年 | 112篇 |
2014年 | 46篇 |
2013年 | 140篇 |
2012年 | 274篇 |
2011年 | 277篇 |
2010年 | 48篇 |
2009年 | 38篇 |
2008年 | 55篇 |
2007年 | 63篇 |
2006年 | 69篇 |
2005年 | 1344篇 |
2004年 | 690篇 |
2003年 | 468篇 |
2002年 | 163篇 |
2001年 | 40篇 |
2000年 | 27篇 |
1999年 | 36篇 |
1998年 | 20篇 |
1997年 | 14篇 |
1995年 | 13篇 |
1994年 | 25篇 |
1992年 | 39篇 |
1991年 | 53篇 |
1990年 | 68篇 |
1989年 | 51篇 |
1988年 | 33篇 |
1987年 | 52篇 |
1986年 | 47篇 |
1985年 | 39篇 |
1984年 | 29篇 |
1983年 | 30篇 |
1981年 | 14篇 |
1979年 | 42篇 |
1978年 | 17篇 |
1977年 | 12篇 |
1976年 | 17篇 |
1975年 | 35篇 |
1974年 | 40篇 |
1973年 | 35篇 |
1972年 | 30篇 |
1971年 | 32篇 |
1970年 | 19篇 |
1969年 | 24篇 |
1968年 | 22篇 |
1967年 | 20篇 |
1966年 | 21篇 |
排序方式: 共有5317条查询结果,搜索用时 31 毫秒
951.
Although analogical reasoning has long been a popular method of reasoning in bioethics, current literature does not sufficiently
grasp its variety. We assert that the main shortcoming is the fact that an analogy’s value is often judged on the extent of
similarity between the source situation and the target situation, while in (bio)ethics, analogies are often used because of certain dissimilarities rather than in spite of them. We make a clear distinction between dissimilarities that aim to reinforce a similar approach in the source situation
and the target situation and dissimilarities that aim to undermine or denounce a similar approach. The former kind of dissimilarity
offers the analogy more normative force than if there were no dissimilarities present; this is often overlooked by authors
who regard all relevant dissimilarities as detrimental to the analogy’s strength. Another observation is that an evaluation
of the normative force of an analogy cannot be made independently of moral principles or theories. Without these, one cannot
select which elements in an analogy are morally relevant nor determine how they should be interpreted. 相似文献
952.
953.
How do humans and their closest relatives, chimpanzees, differ in their fundamental abilities for seeing the visual world? In this study, we directly compared the gaze movements of humans and the closest species, chimpanzees, using an eye-tracking system. During free viewing of a naturalistic scene, chimpanzees made more fixations per second (up to four) than did humans (up to three). This species difference was independent of the semantic variability of the presented scenes. The gap–overlap paradigm revealed that, rather than resulting from the sensitivity to the peripherally presented stimuli per se, the species difference reflected the particular strategy each species employed to solve the rivalry between central (fixated) and peripheral stimuli in their visual fields. Finally, when presented with a movie in which small images successively appeared/disappeared at random positions at the chosen presentation rate, chimpanzees tracked those images at the point of fixation for a longer time than did humans, outperforming humans in their speed of scanning. Our results suggest that chimpanzees and humans differ quantitatively in their visual strategies involving the timing of gaze movement. We discuss the functional reasons for each species’ employing such specific strategies. 相似文献
954.
Am TG 《Nanoethics》2011,5(1):15-28
Trust has become an important aspect of evaluating the relationship between lay public and technology implementation. Experiences
have shown that a focus on trust provides a richer understanding of reasons for backlashes of technology in society than a
mere focus of public understanding of risks and science communication. Therefore, trust is also widely used as a key concept
for understanding and predicting trust or distrust in emerging technologies. But whereas trust broadens the scope for understanding established technologies with well-defined questions
and controversies, it easily fails to do so with emerging technologies, where there are no shared questions, a lack of public
familiarity with the technology in question, and a restricted understanding amongst social researchers as to where distrust
is likely to arise and how and under which form the technology will actually be implemented. Rather contrary, ‘trust’ might
sometimes even direct social research into fixed structures that makes it even more difficult for social research to provide
socially robust knowledge. This article therefore suggests that if trust is to maintain its important role in evaluating emerging
technologies, the approach has to be widened and initially focus not on people’s motivations for trust, but rather the object of trust it self, as to predicting how and where distrust might appear, how the object is
established as an object of trust, and how it is established in relation with the public. 相似文献
955.
Univ.-Prof. Dr. med. Hans-Ludwig Kr?ber 《Forensische Psychiatrie, Psychologie, Kriminologie》2011,5(4):234-243
When dealing with ?old cases?? of preventive detention as well as retrospectively ordered preventive detention, a continuation of confinement should be possible if the offender involved suffers from a ??mental disorder?? which constitutes the danger of future serious violent or sexual crimes. In this psychiatric article it will be explained that the terms ??mental illness?? and also ??mental disorder?? must retain an empirical scientifically definable psychiatric content in order not to instigate deception. They must also be functionally defined in each judicial environment (police law, social law, civil law and criminal law) with respect to the capabilities of the individual which are impaired by the mental disorder. Such an approach could prevent a misuse of psychiatry for purely political security purposes. 相似文献
956.
Stefan H?fer Nicole Pfaffenberger Daniela Renn Marion Platter Lena Ring 《Applied research in quality of life》2011,6(1):81-90
To explore potential response shift effects with different quality of life (QoL) instruments in cardiac patients undergoing
coronary intervention. Study Design and Setting: Recalibration was assessed with the disease specific health-related quality
of life (HRQL) instrument MacNew in combination with a then-test approach. Reconceptualisation and reprioritisation were assessed
with the individualised QoL instrument SEIQoL-DW. Significant treatment effects were seen on the MacNew (global Δ: 0.6 ± 1.1,
p = 0.004) but not on the SEIQoL-DW (Δ: 3.3 ± 16, p = 0.37) 6 months after coronary intervention. No recalibration effect was found on the MacNew then-test, while with the SEIQOL-DW
potential response shift effects of reconceptualisation and reprioritisation were seen. For the first time response shift
effects were explored in cardiac patients undergoing coronary intervention. This study confirmed that there is a clinically
significant improvement in disease specific HRQL over time following successful coronary interventions. However, no treatment
effect was seen for individualised QoL with the SEIQoL-DW. This might be due to reconceptualisation and reprioritisation response
effects. Future studies need to focus on exploring response shift effects, and the interrelationship between its different
components, captured by different patient reported outcome instruments in larger patient groups undergoing coronary interventions. 相似文献
957.
The social networking site (SNS) Facebook is becoming increasingly recognized as a medium through which individuals can investigate and monitor others' activities. However, little is known about whether Facebook monitoring behavior occurs within romantic relationships and, accordingly, the psychological predictors of this behavior. The present study employed an extended theory of planned behavior (TPB) framework including self-esteem, partner trust, and demographic characteristics, to predict frequent Facebook partner-monitoring. Facebook users (N=244) in romantic relationships completed measures assessing the standard TPB constructs (attitude, subjective norm, and perceived behavioral control), additional predictor variables (self-esteem and partner trust), and demographic characteristics (age, gender, relationship length, daily Facebook logins, and time spent per login). One week later, participants reported their level of Facebook partner-monitoring during the previous week. Regression analyses supported the standard TPB constructs of attitude and subjective norm in predicting intentions to engage in frequent Facebook partner-monitoring, with intention, in turn, predicting behavior. Partner trust, but not self-esteem, significantly predicted frequent Facebook partner-monitoring intentions. Of the demographic characteristics, daily Facebook logins significantly predicted both intention and behavior and, unexpectedly, relationship length directly affected behavior. Overall, the current study revealed that frequent Facebook partner-monitoring is influenced by attitudinal, normative, and relational factors and, potentially, increased visits to Facebook. These findings provide a new understanding of an individual's use of the world's leading SNS to monitor their partner's activities and provide a foundation for future studies to investigate the potential negative implications this activity may have for those in romantic relationships. 相似文献
958.
Informed by the practice of code-switching or style-switching in linguistics, “bilingual therapeutics” is proposed as the
complementary integration of two evidence-based practices in psychotherapy: motivational interviewing (MI) and dialectical
behavior therapy (DBT). Unique features of MI and DBT are presented, current research of each practice is reviewed, and their
similarities and distinctions are discussed. It is proposed that fluency in both “languages” of MI and DBT may usher in a
new therapeutic perspective to enhance client case conceptualization, illuminate subtleties of the therapeutic process, and
foster more intentional and deliberate practitioners. Specifically, MI and DBT code-switching may help recruit and retain
clients in formal treatment (e.g.,”speaking” MI more prominently to prepare clients for 12-month standard DBT) and promote
consultation among therapists. The complementary integration of MI and DBT also suggests the emergence of a linguistic “third
space,” including “spirit as synthesis” and “improvisational dance.” 相似文献
959.
Conscious visual perception can fail in many circumstances. However, little is known about the causes and processes leading to failures of visual awareness. In this study, we introduce a new signal detection measure termed subjective discriminability of invisibility (SDI) that allows one to distinguish between subjective blindness due to reduction of sensory signals or to lack of attentional access to sensory signals. The SDI is computed based upon subjective confidence in reporting the absence of a target (i.e., miss and correct rejection trials). Using this new measure, we found that target misses were subjectively indistinguishable from physical absence when contrast reduction, backward masking and flash suppression were used, whereas confidence was appropriately modulated when dual task, attentional blink and spatial uncertainty methods were employed. These results show that failure of visual perception can be identified as either a result of perceptual or attentional blindness depending on the circumstances under which visual awareness was impaired. 相似文献
960.
Mental health has long been defined as the absence of psychopathologies, such as depression and anxiety. The absence of mental
illness, however, is a minimal outcome from a psychological perspective on lifespan development. This article therefore focuses
on mental illness as well as on three core components of positive mental health: feelings of happiness and satisfaction with
life (emotional well-being), positive individual functioning in terms of self-realization (psychological well-being), and
positive societal functioning in terms of being of social value (social well-being). The two continua model holds that mental
illness and mental health are related but distinct dimensions. This model was studied on the basis of a cross-sectional representative
internet survey of Dutch adults (N = 1,340; 18–87 years). Mental illness was measured with the Brief Symptom Inventory and mental health with the Mental Health
Continuum Short Form. It was found that older adults, except for the oldest-old, scored lower on psychopathological symptoms
and were less likely to be mentally ill than younger adults. Although there were fewer age differences for mental health,
older adults experienced more emotional, similar social and slightly lower psychological well-being. In sum, today’s older
adults have fewer mental illness problems, but they are not in a better positive mental health than today’s younger adults.
These findings support the validity of the two continua model in adult development. 相似文献