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   2987篇
  免费   225篇
  国内免费   286篇
  3498篇
  2024年   13篇
  2023年   81篇
  2022年   79篇
  2021年   103篇
  2020年   181篇
  2019年   158篇
  2018年   165篇
  2017年   179篇
  2016年   186篇
  2015年   119篇
  2014年   144篇
  2013年   464篇
  2012年   88篇
  2011年   129篇
  2010年   66篇
  2009年   119篇
  2008年   102篇
  2007年   108篇
  2006年   106篇
  2005年   111篇
  2004年   113篇
  2003年   90篇
  2002年   71篇
  2001年   65篇
  2000年   62篇
  1999年   39篇
  1998年   40篇
  1997年   33篇
  1996年   26篇
  1995年   38篇
  1994年   24篇
  1993年   12篇
  1992年   10篇
  1991年   14篇
  1990年   11篇
  1989年   12篇
  1988年   9篇
  1987年   13篇
  1986年   9篇
  1985年   10篇
  1984年   19篇
  1983年   9篇
  1982年   13篇
  1981年   8篇
  1980年   7篇
  1979年   16篇
  1977年   4篇
  1976年   4篇
  1975年   7篇
  1974年   4篇
排序方式: 共有3498条查询结果,搜索用时 15 毫秒
241.
The emergence of the first structures that are capable of “replication” is a mysterious problem of evolution. The majority of the scientists dealing with evolution agree on the point that this is the very property that differenciate animate and inanimate beings. The main purpose of the present paper is to prove that the phenomenon of replication cannot be forced into frames of the Bios, but is an inherent attribute of the material, and the biological replication is a more advanced and perfect manifestation of this attribute.

The cohesion and resistance, in a general sense, is the attribute of any material system, i.e. it is an attribute of coexistence that makes possible its life. This may be the property that was identified as Jacob Böhme's mystic concept “Qual”. The self‐preservation, the cohesion in a general sense is manifested against the different destructive effects by scattering the “attacked” system into successor systems. This process makes possible for the different successive systems to get among other, differing circumstances than they were before the destructive forces began to exercise their impact. These other circumstances however include the possibility of the emergence of other systems of interrelatedness, and the successive system may become different from the parent system. The multiplication and scattering, due to the impact of destruction, at the same time increase the system's surface of interaction, and this leads to an organization of higher level.  相似文献   
242.
The purpose of this paper is to promote thought and discussion around how and why we treat patients in chosen ways. In the present climate practitioners are required to treat patients following NICE guidelines in which cognitive behavioural therapy (CBT) is the treatment of choice in the majority of diagnoses. This paper raises concerns that this may lead to an homogenization of treatment, loss of invaluable skills and understanding from other treatment approaches, and loss to the patient who may be best cared for by a combination of treatments and approaches, most notably patients presenting with complex pathology. This paper aims to present this as a general principle, and by way of example, will focus on coupling two specific treatment orientations, cognitive behavioural therapy with psychodynamic psychotherapy, with the specific diagnosis of obsessive compulsive disorder (OCD).

Methods: Clinical material is drawn from case studies from practice in secondary adult mental health care services within the NHS. All patients were referred to the psychological services for treatment for OCD and provided with 1:1 therapy with UKCP‐registered therapists. Details have been anonymized by describing fictitious cases re‐constructed from clinical material. A theoretical understanding is included which provides both an overview for integrating treatment for the specific example of OCD and is intended by extension to other diagnoses.

Results: Working with the commonalities of therapeutic approaches, and integrating specific skills of CBT and psychodynamic psychotherapy, appears to offer a viable mode of treatment for cases resistant to single‐orientation therapies.

Conclusions: Coupling the skills of different therapies can be effective in treating complex patients that are referred to the secondary mental health services. Conversely, restricting practice to single orientation therapies can lead to an impoverished care for patients and diminution of invaluable therapeutic skills which may become underused, undervalued and lost in the practice of mental health care within the NHS. Acknowledgement of the skills of others, valuing these and learning from each other can help to avoid the defensive reactions of practitioners, where each may defensively retreat to their corners of specialism. Respecting and sharing skills from different orientations, and acknowledging this in the NICE guidelines, is good for both mental health services and patient care and addresses the concerns raised by practitioners exemplified by Bateman (2000 Bateman, A. 2000. Integration in psychotherapy: An evolving reality in personality disorder.. British Journal of Psychotherapy, 17(2): 147156.  [Google Scholar], p. 147) that ‘psychotherapy continues to be bedeviled by ideological schisms with practitioners apparently ignoring alternative conceptualizations and potentially superior interventions’.  相似文献   
243.
Using the modified Dimensional Change Card Sort task, we examined the influence of positive affect on task switching by inspecting various markers for the costs, including restart cost, switch cost and mixing cost. Given that the executive-control processes that underlie switching performance—i.e., inhibition or shifting—are distinct from the component processes that underlie non-switching performance—i.e., stimulus evaluation, resource allocation or response execution—we hypothesised that if positive affect facilitates task switching via executive-control processes, rather than via component processes, positive affect would reduce both switch and restart costs, but not mixing cost, because both switch and restart costs rely on executive processes, while mixing cost imposes only minimal demands on executive processes. We found beneficial effects of positive affect on both restart and switch costs, but not on mixing costs. These results suggest that positive affect improves switching abilities via executive processes rather than via component processes.  相似文献   
244.
This study investigated whether overgeneral autobiographical memory (OGM) predicts the course of symptoms of depression and anxiety in a community sample, after 5, 6, 12 and 18 months. Participants (N = 156) completed the Autobiographical Memory Test and the Depression Anxiety Stress Scales-21 (DASS-21) at baseline and were subsequently reassessed using the DASS-21 at four time points over a period of 18 months. Using latent growth curve modelling, we found that OGM was associated with a linear increase in depression. We were unable to detect changes over time in anxiety. OGM may be an important marker to identify people at risk for depression in the future, but more research is needed with anxiety.  相似文献   
245.
When deployed U.S. soldiers attempt to influence the attitudes, beliefs, or behaviors of civilians, success can save lives and failure can be deadly. Survey data from 228 military personnel with deployment experience to Iraq and Afghanistan revealed that in a challenging wartime environment, empathy, respect, prior relationships, and familiarity with influence targets predicted success in cross-cultural influence attempts. Influence techniques involving resources and positive feelings were used more commonly in relatively successful influence attempts; negative tactics were used more commonly in unsuccessful attempts.  相似文献   
246.
The purpose of this paper is to describe the prevalence of self‐reported types of extradyadic romantic and sexual activity among adult Norwegians and to explore the role of infidelity in breaking up a permanent relationship. The results are based on 1,001 web interviews with persons ranging in age from 18 to 67 years. The majority of respondents reported having engaged in some kind of extradyadic romantic and/or sexual activity. Forty‐five percent of the women and 39% of the men claimed they had experienced a previous breakup from a marriage or cohabiting relationship. Among those aged 50 years or older, the most important reasons for breaking up a previous relationship were infidelity (38%) and lost love (38%). More men (44%) than women (33%) reported infidelity. Respondents younger than 50 years were more motivated by boredom. Among respondents below the age of 50 years, the most frequently reported reasons for considering termination of a present relationship were quarreling (37%), poor sex life (29%), and “other” reasons (25%). Accordingly, infidelity was not identified as an essential factor for considering a breakup from the present relationship.  相似文献   
247.
This article explores one type of visionary experience described and interpreted by mystics within certain traditions, which may be termed a ‘cognitive’ or ‘gnostic’ vision. Such visions provide information or offer solutions to problems of theology or religious interpretation.

A close textual analysis of a selection from the writings of an eighteenth century Indian Sufi, Shāh Wal? Allāh of Delhi, demonstrates this process of intensive thinking through superimposed grids which combine elements of religious symbol systems. This type of thinking triggers a mystical experience which is subsequently interpreted in a problem solving or divinatory mode.  相似文献   
248.
Parietal cortical areas are involved in sensori-motor transformations for their respective contralateral hemifield/body. When arms of the subjects are crossed while their gaze is fixed straight ahead, vision of the hand is processed by the hemisphere ipsilateral to the arm position and proprioception of the arm by the contralateral hemisphere. It induces interhemispheric transfer and remapping. Our objective was to investigate whether a single pulse TMS applied to the left parietal cortical area would disturb interhemispheric remapping in a similar case, and would increase a simple reaction time (RT) with respect to a control single pulse TMS applied to the frontal cortical area. Two LED were superimposed and located in front of the subjects on the saggital axis. Subjects were asked to carefully fixate on these LED during each trial. The lighting of the red LED was used as a warning signal. Following the green one was illuminated after a variable delay and served as a go-signal. The hand for the response was determined before the start of each trial. TMS was applied to the left parietal, the left frontal cortical areas, or not applied to the subject. Results revealed that: (1) Irrespective of its location, single pulse TMS induced a non-specific effect similar to a startle reflex and reduced RT substantially (15 ms on average) with respect to a control condition without TMS (mean value = 153 ms). (2) Irrespective of TMS, RT were shorter when the right or the left hand was positioned in the right visual hemi-field (i.e. normal and crossed positions respectively). (3) Finally, RT increased when single pulse TMS was applied to the left parietal area and when hands were crossed irrespective of which hand was used. We concluded that interhemispheric sensori-motor remapping was disrupted by a single pulse TMS that was applied to the left parietal cortex. This effect was also combined with some visual attention directed towards the hand located on the right visual hemi-field.  相似文献   
249.
Pitch is derived by the auditory system through complex spectrotemporal processing. Pitch extraction is thought to depend on both spectral cues arising from lower harmonics that are resolved by cochlear filters in the inner ear, and on temporal cues arising from the pattern of action potentials contained in the cochlear output. Adults are capable of extracting pitch in the absence of robust spectral cues, taking advantage of the temporal cues that remain. However, recent behavioral evidence suggests that infants have difficulty discriminating between stimuli with different pitches when resolvable spectral cues are absent. In the current experiments, we used the mismatch negativity (MMN) component of the event related potential derived from electroencephalographic (EEG) recordings to examine a cortical representation of pitch discrimination for iterated rippled noise (IRN) stimuli in 4- and 8-month-old infants. IRN stimuli are pitch-evoking sounds generated by repeatedly adding a segment of white noise to itself at a constant delay. We created IRN stimuli (delays of 5 and 6 ms creating pitch percepts of 200 and 167 Hz) and high-pass filtered them to remove all resolvable spectral pitch cues. In experiment 1, we did not find EEG evidence that infants could detect the change in the pitch of these IRN stimuli. However, in Experiment 2, after a brief period of pitch-priming during which we added a sine wave component to the IRN stimulus at its perceived pitch, infants did show significant MMN in response to pitch changes in the IRN stimuli with sine waves removed. This suggests that (1) infants can use temporal cues to process pitch, although such processing is not mature and (2) that a short amount of pitch-priming experience can alter pitch representations in auditory cortex during infancy.  相似文献   
250.
Abstract

SPARK is a controlled field study of a multi-component elementary school program to promote physical activity. One component is a weekly classroom-based self-management program, with the goal of increasing physical activity outside of school. The curriculum included goal setting, behavioral skills training, a reward system, and parent involvement. An evaluation of curriculum implementation and association between process and outcome was conducted using direct observation of lessons, subjective ratings by 24 teachers and 391 parents, and participation records of 549 students. Teachers viewed the self-management curriculum less positively than the physical education curriculum. Teachers were observed implementing an average of 65% of curriculum elements, which may have contributed to the limited effects of the self-management program. Student participation in the program, measured by points earned for doing out of school physical activity, was correlated significantly with changes in body mass index and multiple psychosocial variables among boys but not girls. Barriers to full program implementation were identified, and a remaining challenge is to improve self-management curriculum implementation by teachers.  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