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   1758篇
  免费   43篇
  国内免费   1篇
  1802篇
  2024年   19篇
  2023年   52篇
  2022年   23篇
  2021年   86篇
  2020年   170篇
  2019年   195篇
  2018年   148篇
  2017年   128篇
  2016年   86篇
  2015年   82篇
  2014年   61篇
  2013年   390篇
  2012年   21篇
  2011年   22篇
  2010年   17篇
  2009年   27篇
  2008年   23篇
  2007年   24篇
  2006年   26篇
  2005年   25篇
  2004年   19篇
  2003年   13篇
  2002年   10篇
  2001年   15篇
  2000年   15篇
  1999年   5篇
  1998年   10篇
  1997年   9篇
  1996年   6篇
  1995年   12篇
  1994年   5篇
  1993年   1篇
  1992年   3篇
  1990年   1篇
  1988年   1篇
  1985年   5篇
  1984年   13篇
  1983年   2篇
  1982年   6篇
  1981年   4篇
  1980年   7篇
  1979年   5篇
  1978年   2篇
  1977年   1篇
  1976年   2篇
  1975年   3篇
  1974年   1篇
  1973年   1篇
排序方式: 共有1802条查询结果,搜索用时 15 毫秒
61.
    
As shown in our previous paper (‘Regression I. Experimental approaches to regression’, JAP, 65, 2, 345-65), the common mechanism of regression can be described as reversible dedifferentiation, which is understood as a relative increase of the proportion of low-differentiated (older) systems in actualized experience. Experimental data show that regression following disease (chronic tension headache) is followed by adaptation and an increase in system differentiation in that experience domain which contains systems responsible for that adaptation. The results of mathematical modelling support the idea that reversible dedifferentiation can be one of the mechanisms for increasing the effectiveness of adaptation through learning. Reversible dedifferentiation, which is phenomenologically described as regression, is a general mechanism for restructuring the organism-environment interactions in situations where behaviours that were effective in the past become ineffective. Reversible dedifferentiation has evolved as a component of adaptation when new behaviours are formed and large-scale modifications in the existing behaviours are required in the face of changes in the external and/or internal environment. Thus, the authors believe that this article provides evidence for Jung’s view that regression is not only a ‘return’ to past forms of thinking, affects and behaviour, but that regressive processes provide a significant impetus for psychological growth and development.  相似文献   
62.
    
Boys and young men more frequently live out aspects of their psychic and social alienation online. This paper explores some of the risks and dangers that can arise from retreats into the two-dimensional world of cyberspace. It focuses more specifically on videogaming called MOBA, multi-player online battle arena games, in which players point and shoot at others. A case example emphasizes the clinical problems emerging from violent fantasies that seek a false form of containment in cyberspace. Themes of destructive fantasizing are further amplified through images of apocalypse, which are often prevalent in combat arena videogames. Textual sources from the Book of Revelation offer possible understanding for various elements of destructiveness as it appears in vulnerable male psyches. Therapeutic contact that combines a relational, containing approach and a broadly spiritual and soulful perspective can provide a path to healing such violent splits within the psyches of boys and young men.  相似文献   
63.
    
This is a quantitative study of an 11-year-old boy diagnosed with major depression who in all but one session made a sandplay. A computerized system was used to analyse the written verbalizations on four dimensions of positive and negative: emotions, contracts (psychosocial agreements, relationships, etc.), performance (behaviour) and rewards. It was hypothesized that the verbalizations made by the patient (recorded by the therapist) would become more positive and less negative during the course of therapy. The positive and negative values of the four dimensions were correlated with the session number. This was supported on two (performance & contract) of the four positive dimensions (statistically significant). The hypothesis that the negative dimensions would become less negative was supported on all four dimensions (statistically significant). Thus, six of the eight hypotheses were supported. This uninvestigated area of research illustrates verbal interactions between patient and therapist were an important aspect of sandplay therapy. Through reanalysing the sessions for quantitative content, written recording of direct quotes and observation of behaviour, data was entered into a valid and reliable coding system to quantitatively analyze the verbalizations. This analysis of verbalizations of the patient and observations made by the therapist indicates sandplay therapy is multifaceted.  相似文献   
64.
    
Background/Objective: This study aims to characterize the differences on the short-term temporal network dynamics of the undirected and weighted whole-brain functional connectivity between healthy aging individuals and people with mild cognitive impairment (MCI). The Network Change Point Detection algorithm was applied to identify the significant change points in the resting-state fMRI register, and we analyzed the fluctuations in the topological properties of the sub-networks between significant change points. Method: Ten MCI patients matched by gender and age in 1:1 ratio to healthy controls screened during patient recruitment. A neuropsychological evaluation was done to both groups as well as functional magnetic images were obtained with a Philips 3.0T. All the images were preprocessed and statistically analyzed through dynamic point estimation tools. Results: No statistically significant differences were found between groups in the number of significant change points in the functional connectivity networks. However, an interaction effect of age and state was detected on the intra-participant variability of the network strength. Conclusions: The progression of states was associated to higher variability in the patient's group. Additionally, higher performance in the prospective and retrospective memory scale was associated with higher median network strength.  相似文献   
65.
关注人文素质教育语境下的中医医史文献   总被引:1,自引:0,他引:1       下载免费PDF全文
随着社会的发展及医学模式的转换,人们呼唤重新审视医学的目的和价值,期待着医学人文关怀传统的复兴。于是,加强医学院校大学生人文素质教育,倡导人格教育理念,成为医学院校加强素质教育的重要内容。中医医史文献教育教学的视角,分析素质教育语境下的专业教育问题。  相似文献   
66.
Bimbó  Katalin 《Studia Logica》2000,66(2):285-296
Combinatory logic is known to be related to substructural logics. Algebraic considerations of the latter, in particular, algebraic considerations of two distinct implications (, ), led to the introduction of dual combinators in Dunn & Meyer 1997. Dual combinators are "mirror images" of the usual combinators and as such do not constitute an interesting subject of investigation by themselves. However, when combined with the usual combinators (e.g., in order to recover associativity in a sequent calculus), the whole system exhibits new features. A dual combinatory system with weak equality typically lacks the Church-Rosser property, and in general it is inconsistent. In many subsystems terms "unexpectedly" turn out to be weakly equivalent. The paper is a preliminary attempt to investigate some of these issues, as well as, briefly compare function application in symmetric -calculus (cf. Barbanera & Berardi 1996) and dual combinatory logic.  相似文献   
67.
Algebras of Intervals and a Logic of Conditional Assertions   总被引:1,自引:0,他引:1  
Intervals in boolean algebras enter into the study of conditional assertions (or events) in two ways: directly, either from intuitive arguments or from Goodman, Nguyen and Walker's representation theorem, as suitable mathematical entities to bear conditional probabilities, or indirectly, via a representation theorem for the family of algebras associated with de Finetti's three-valued logic of conditional assertions/events. Further representation theorems forge a connection with rough sets. The representation theorems and an equivalent of the boolean prime ideal theorem yield an algebraic completeness theorem for the three-valued logic. This in turn leads to a Henkin-style completeness theorem. Adequacy with respect to a family of Kripke models for de Finetti's logic, ukasiewicz's three-valued logic and Priest's Logic of Paradox is demonstrated. The extension to first-order yields a short proof of adequacy for Körner's logic of inexact predicates.  相似文献   
68.
Free Łukasiewicz and Hoop Residuation Algebras   总被引:2,自引:1,他引:1  
Berman  Joel  Blok  W. J. 《Studia Logica》2004,77(2):153-180
Hoop residuation algebras are the {, 1}-subreducts of hoops; they include Hilbert algebras and the {, 1}-reducts of MV-algebras (also known as Wajsberg algebras). The paper investigates the structure and cardinality of finitely generated free algebras in varieties of k-potent hoop residuation algebras. The assumption of k-potency guarantees local finiteness of the varieties considered. It is shown that the free algebra on n generators in any of these varieties can be represented as a union of n subalgebras, each of which is a copy of the {, 1}-reduct of the same finite MV-algebra, i.e., of the same finite product of linearly ordered (simple) algebras. The cardinality of the product can be determined in principle, and an inclusion-exclusion type argument yields the cardinality of the free algebra. The methods are illustrated by applying them to various cases, both known (varieties generated by a finite linearly ordered Hilbert algebra) and new (residuation reducts of MV-algebras and of hoops).  相似文献   
69.
In this article, I attempt to restore the philosophical significance of that nonformalizable, noniterable, "singular' element of natural language that I call "style." I begin by critically addressing the exclusion of such instances of natural language by both semantics-oriented logical analysis and a restricted variation of structuralist linguistics. Despite the obvious advantages – with regard to style – of "pragmatic"approaches to language, such pragmatism merely returns to rule-determination in the guise of "normativity." Although style by definition resists any kind of rule-determination – whether posed in terms of semantics or intersubjective regulations of speech-acts – there can be no consideration of language that ignores the persistence of style in natural language. In terms of cognition, any discursive agent understands more than allowed by either semantics or speech-act theory. I ascribe this element of excessive signification to the role of style. My principal thesis is twofold: (1) a hermeneutic approach (exemplified by Schleiermacher) to literature should reveal the heuristically decisive role played by style in philosophy; and, more radically still, (2) style, in fact, may be crucially determinative of philosophical discourse in general. I suggest that a closer scrutiny of the lesser-known works of Ludwig Wittgenstein, conventionally regarded as having dreamt of a "philosophy without style," may consolidate the restoration of style's philosophical import.  相似文献   
70.
Resumen

En el presente trabajo de investigación nos interesamos por dar a conocer las características psicométricas y estructurales de una nueva escala de evaluación de estrategias de aprendizaje escolar, así como también por el tipo de relación que mantiene este constructo con otras variables o correlatos importantes en el funcionamiento cognitivo como son los procesos de atribución, el autoconcepto y la motivación académica La muestra de sujetos, en base a la cual se realiza el estudio, está compuesta por 371 alumnos/as de 5°, 6°, 7° y 8° de E.G.B., pertenecientes a colegios públicos de la zona central del Principado de Asturias, de los cuales 192 son chicos y 179 son chicas. Su nivel socioeconómico es medio y pertenecen a una zona industrial. Los resultados obtenidos indican que (a) la escala LASSI es moderadamente fiable y con una estructura factorial que pudiera variar con la edad de los sujetos, (b) que existen diferencias entre niños y niñas en algunas de las dimensiones estratégicas así como también respecto a la edad de los mismos y (c) las estrategias de aprendizaje se encuentran notablemente relacionadas con los procesos atribucionales, el autoconcepto, las metas de estudio y el rendimiento de los alumnos. En el último punto del trabajo, en primer lugar, advertimos de la naturaleza exploratoria y provisionalidad de los datos obtenidos así como de la neceidad de la realización de otras investigaciones con el fin de disipar ciertas discrepancias y, en segundo lugar, interpretamos los resultados de nuestro trabajo contextualiz ándolos dentro de las actuales teorías metacognitiv as de la instrucción.  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