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981.
Background: Professionals who use measures of adaptive behaviour when working with special populations may assume that adaptive behaviour is a consistent and linear construct at various ability levels and thus believe the construct of adaptive behaviour is the same for high and low performers. That is, highly adaptive people simply are assumed to have a higher level of adaptive behaviour than their less adaptive peers (i.e. individuals with special need, including intellectual disability). This study examines the viability of this assumption and poses an alternative hypothesis: adaptive behaviour is qualitatively different for high and low performers. Methods: Portions of the Adaptive Behaviour Assessment System-II’s standardisation sample were used to examine the structure of adaptive behaviour in high and low performers. Results. Results of factor analysis indicated that the amount of variance attributable to a general factor of adaptive behaviour declines at lower levels of adaptive ability, indicating that adaptive behaviours are not organised in the same manner across the spectrum of adaptive ability. Conclusions: Additionally, knowledge of an individual’s adaptive skills, not merely their general adaptive composite, seemingly is especially important when working with special needs children and youth who display deficits in adaptive behaviour. 相似文献
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Brooks A. Rosenquist Erin C. Henrick Thomas M. Smith 《Journal of Education for Students Placed at Risk》2015,20(1-2):42-57
The gap in achievement in mathematics between at-risk students and their more advantaged counterparts is a persistent problem of the U.S. education system. Although some research-based curricula and pedagogy have demonstrated promise in supporting students from diverse backgrounds to develop conceptual understanding and procedural fluency in mathematics, scaling up instructional change across a district organization is a significant challenge. The Middle School Mathematics and the Institutional Setting of Teaching (MIST) Project is a research–practice partnership seeking to understand how large urban school districts can support the development of rigorous and equitable middle-school mathematics instruction at scale. This article enumerates the goals and design of this multiyear, multidistrict partnership, and describes one illustrative example of how our partnership activities informed and supported one district's efforts to improve mathematics instruction over multiple years. General recommendations for district–researcher partnerships are discussed. 相似文献
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Thomas Eckes 《教育实用测度》2015,28(2):85-98
C-tests are gap-filling tests widely used to assess general language proficiency for purposes of placement, screening, or provision of feedback to language learners. C-tests consist of several short texts in which parts of words are missing. We addressed the issue of local dependence in C-tests using an explicit modeling approach based on testlet response theory. Data were provided by a total sample of 4,708 participants working on eight C-test texts with 20 gaps each. The resulting parameter estimates were compared to those obtained from (a) a polytomous item response theory (IRT) model and (b) a standard IRT model that ignored the dependence structure. Testlet effects proved to be very small and correspondence between parameters obtained from the different modeling approaches was high. When local dependence was ignored reliability of the C-test was slightly overestimated. Implications for the analysis of testlets in general, and C-tests in particular are discussed. 相似文献
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David Vittle Thomas 《Educational studies》2015,41(1-2):188-208
This study explores the perspectives of education practitioners towards the process of reintegrating pupils (many of whom display social, emotional and behavioural difficulties), from a pupil referral unit (PRU) to mainstream educational provision in a rural bilingual Welsh authority, and examines the barriers and facilitators they identified as evident within their individual schools and catchment area served with regards to reintegrating and including pupils. The study locates the process within a specific geographical context and discusses whether there are specific reintegration barriers and facilitators inherent within the setting. Patterns of pupil referral and reintegration between the PRU and mainstream schools were examined and analysed from “pupil tracking data” which tracked pupils throughout an academic year from their arrival at the PRU before the perspectives of education practitioners towards potential reintegration barriers and facilitators were gathered through an initial expert sample and a second landscape sample postal questionnaire. Interviews were subsequently conducted with respondents from Primary, Secondary and PRU settings to drill down into the influence of specific barriers and facilitators identified earlier. This study suggests that although generic reintegration barriers and facilitators may be evident within all settings, there were specific factors inherent within this geographical context identified by education practitioners, which acted in the most part as barriers to successful reintegration and inclusion. 相似文献
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Lisa Sprenger Silvio Dutz Thomas Schneider Stefan Odenbach Urs O. H?feli 《Biomicrofluidics》2015,9(4)
Microfluidic spirals were used to successfully separate rare solid components from unpretreated human whole blood samples. The measured separation ratio of the spirals is the factor by which the concentration of the rare component is increased due to the Dean effect present in a flow profile in a curved duct. Different rates of dilution of the blood samples with a phosphate-buffered solution were investigated. The diameters of the spherical particles to separate ranged from 2 μm to 18 μm. It was found that diluting the blood to 20% is optimal leading to a separation ratio up to 1.97. Using two spirals continuously placed in a row led to an increase in separation efficacy in samples consisting of phosphate-buffered solution only from 1.86 to 3.79. Numerical investigations were carried out to display the flow profiles of Newtonian water samples and the shear-thinning blood samples in the cross-section of the experimentally handled channels. A macroscopic difference in velocity between the two rheologically different fluids could not be found. The macroscopic Dean flow is equally present and useful to help particles migrate to certain equilibrium positions in blood as well as lower viscous Newtonian fluids. The investigations highlight the potential for using highly concentrated, very heterogeneous, and non-Newtonian fluidic systems in known microsystems for screening applications. 相似文献