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91.
Until recently, general assumptions were made about the importance of the self-system in self-regulation (e.g., importance of self-concept, self-efficacy, self-esteem), but the more specific underlying structures and processes of the self-system that are involved in this self-management process were rarely addressed. This article presents theoretical and empirical support for a preliminary causal model of the role of the self-system in self-regulated learning. The model postulates that for self-regulated learning processes to be engaged, students must view themselves as activators of these processes (i.e., they must possess positive self-views in general as well as have specific perceptions of competency and control in particular learning situations). The model also postulates a recursive and reciprocal relationship between the processes involved, such that continual self-evaluations of competency and control can force changes in perceptions of self, the learning task, goal importance, etc., that, in turn, exert continuing influences on motivation, use of self-regulatory processes, and actual task performance. Educational implications of the model are discussed along with future research directions.  相似文献   
92.
Energy balance of locomotion with pedal-driven watercraft   总被引:1,自引:0,他引:1  
In this study, we examined the mechanics and energetics of locomotion with a paddle-wheel boat and a water bike. Power output (Wtot) was measured directly on the water bike by means of an instrumented chain-ring. The simultaneous assessment of oxygen uptake (VO2) allowed the computation of the "overall" efficiency of locomotion (etao = Wtot/VO2). Mean etao was 0.27 (s = 0.02), which was unaffected by the speed, and was assumed to be the same for the two boats as both are semi-recumbent bicycles. For the paddle-wheel boat, Wtot was then obtained from etao and measures of VO2. The power to overcome (passive) drag was calculated as Wd = D x v (where D is the force measured by means of a load cell when towing the boats at given speeds). Propelling efficiency was calculated as etap = Wd/Wtot, which was lower with the paddle-wheel boat (mean 0.35, s = 0.01) than with the water bike (mean 0.57, s = 0.01). The observed differences in etap and Wd explain why at the highest speed tested (approximately 3 m s(-1), the energy required to cover a unit distance with the water bike is similar to that required to move the paddle-wheel boat at 1.3 m s-1).  相似文献   
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TechTrends - There can be an untethered excitement connected with ever-expanding technologies and the vastness of educational opportunities that online learning generates. Yet, these new and...  相似文献   
94.
The aim of this study was to understand whether the reading comprehension process is better explained by a single or by multiple factors. 184 students (9 to 13 years old) were presented with a recently devised battery of tests, that measure ten aspects of reading comprehension. Structural equation modelling showed that a two factors model better accounts for the data compared to a one or a three factors model. Results confirmed the hypothesis which distinguishes between ‘basic’ and ‘complex’ aspects of reading comprehension. The second goal of the study was to analyze the relationship between the two-components model and scholastic achievement. Our results highlighted that the more ‘complex’ aspects of reading comprehension, reflecting some metacognitive knowledge and control processes, are the better predictors of scholastic achievement.  相似文献   
95.
Certification tests for elementary teachers in Ontario were introduced in 1871 and in 2002. Although the provincial government’s stated goals for the testing programs were similar, the 2002 program was opposed by the initial teacher education programs and the teachers’ associations, but the 1871 program was not. The authors argue that much of this difference can be attributed to the relationship of the tests to other requirements for certification and the process for determining the content of the tests.  相似文献   
96.
While the role of the upper torso and pelvis in driving performance is anecdotally appreciated by golf instructors, their actual biomechanical role is unclear. The aims of this study were to describe upper torso and pelvis rotation and velocity during the golf swing and determine their role in ball velocity. One hundred recreational golfers underwent a biomechanical golf swing analysis using their own driver. Upper torso and pelvic rotation and velocity, and torso-pelvic separation and velocity, were measured for each swing. Ball velocity was assessed with a golf launch monitor. Group differences (groups based on ball velocity) and moderate relationships (r > or = 0.50; P < 0.001) were observed between an increase in ball velocity and the following variables: increased torso-pelvic separation at the top of the swing, maximum torso-pelvic separation, maximum upper torso rotation velocity, upper torso rotational velocity at lead arm parallel and last 40 ms before impact, maximum torso-pelvic separation velocity and torso-pelvic separation velocity at both lead arm parallel and at the last 40 ms before impact. Torso-pelvic separation contributes to greater upper torso rotation velocity and torso-pelvic separation velocity during the downswing, ultimately contributing to greater ball velocity. Golf instructors can consider increasing ball velocity by maximizing separation between the upper torso and pelvis at the top of and initiation of the downswing.  相似文献   
97.
Abstract

Purposes of the study were to (1) determine the extent to which occupational education instructors in postsecondary institutions in North Carolina used individualized instruction; and to (2) develop a model, evaluative measures, and guidelines for use in assessing individualized instruction approaches. An Individualized Instruction Inventory was designed to determine demographic data, practices, and attitudes of occupational education instructors. The sample consisted of instructors who had rated themselves as moderately to highly individualizing instruction. Inventories were returned by 77% of the 354 instructors in the sample. A discriminant analysis was used to determine demographic variables that differentiated (1) between instructors with high and low attitude scores; and (2) among instructors with high, average, and low practice scores. The four components of the model developed were (1) delineate information, (2) plan for data collection, (3) obtain information, and (4) provide information for decision making. Tasks to be completed within each phase were specified, and guidelines for use of the model were written. Evaluative measures appropriate for collecting the desired data were either selected or developed.  相似文献   
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