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By use of the multiple Laplace transform a partial differential equation and its associated boundary conditions characterizing a boundary value problem in n independent real variables can be transferred directly into an algebraic equation in n independent complex variables. This algebraic equation can be solved for the multiple transform of the solution of the boundary value problem. Multiple inversion of this transform then gives the desired solution. The general theory underlying such solution of boundary value problems in two and three independent variables is advanced in detail. Use of this theory is illustrated by solution of two specific problems.  相似文献   
294.
This set of experiments assessed the influence of RateMyProfessors.com profiles, and the perceived credibility of those profiles, on students’ evaluations of professors and retention of material. In Study 1, 302 undergraduates were randomly assigned to read positive or negative RateMyProfessors.com profiles with comments that focused on superficial or legitimate professor features. Participants then watched a lecture clip, provided professor ratings and completed a quiz on the lecture. In Study 2, 81 students who were randomly assigned to read the same RateMyProfessors.com profiles before an actual class provided credibility ratings of the information, listened to a lecture and provided professor ratings at the end. Across both experiments, one in a laboratory setting, and one in an authentic undergraduate lecture, participants gave more favourable professor ratings after reading positive evaluations from RateMyProfessors.com information. These findings establish the causal link between professor information and subsequent evaluations.  相似文献   
295.
Young children with disabilities acquire behavior problems as a result of many factors. When planning interventions, it is important to remember that all children may display stages of inappropriate behaviors at various times during their early development. In most cases, the problems are short-lived and typically improve with guidance and age. There are children with continuing or increasing problem behaviors that result in injury to self or others or that cause damage to the environment; interfere with development, learning, and acquisition of new skills; or socially isolate the child. We discuss interventions and prevention strategies for young children with persistent and consistent behavior problems and present directions for future research.  相似文献   
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The successful inclusion of children with developmental concerns in general education classrooms is influenced by the participation of general educators on the teams that support these children. One hundred and forty-eight general education teachers who were serving on teams that support children with developmental concerns in schools were asked to complete the Attitudes About Teamwork Survey, the Team Characteristics Survey, and the Team Process Perception Survey. Respondents held a generally positive attitude about teamwork. Challenges related to scheduling and time for teaming were noted. Central themes emerged relative to perceptions about benefits (discipline collaboration, sharing of knowledge/ideas), limitations (time constraints), and supports (collaboration and supports of individual efforts). Respondents provided recommendations for the improvement of teamwork related to management, organization, and communication. Practical implications of the results and directions for further investigation in this area are discussed.  相似文献   
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Media-selection decisions of 30 instructional development graduate students were studied under intuitive and model-directed decision-making conditions. Students were given three media-selection problems and were directed to select an appropriate medium for each problem and to write a rationale for the medium selected. The students used thier intuitions to select media for the first problem. They used a formal media selection process to select media for the other two problems. Results indicated that the proportion of students who made correct media selections when they used their intuition was not significantly different from the proportion who made correct selections the first time they used the formal selection process. The proportion of students who made correct selections the second time they used the formal process was significantly greater than the proportion who made correct selection decisions when using their intuition and when using the formal selection process the first time. Subsequent analysis, however, indicated that there was no correlation between the correct use of the formal selection process and making correct media-selection decisions. Implications for the design and use of formal media selection processes in instructional development are described. The authors appreciate the assistance provided by Gene Glass regarding the analysis and interpretation of the data reported in this study.  相似文献   
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Reflection on the process of learning is believed to be an essential ingredient in the development of expert learners. By employing reflective thinking skills to evaluate the results of one's own learning efforts, awareness of effective learning strategies can be increased and ways to use these strategies in other learning situations can be understood. This article describes how expert learners use the knowledge they have gained of themselves as learners, of task requirements, and of specific strategy use to deliberately select, control, and monitor strategies needed to achieve desired learning goals. We present a model of expert learning which illustrates how learners' metacognitive knowledge of cognitive, motivational, and environmental strategies is translated into regulatory control of the learning process through ongoing reflective thinking. Finally, we discuss the implications that the concept of expert learning has for instructional practices.  相似文献   
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Good and poor readers at the junior high school level and good and poor spellers at the university level were compared on their ability to produce words in response to a semantic cue (a category name), a visual cue (three letters), and an auditory cue (a syllable rime). Kindergarten children were tested on a word-identification task and their retrieval of words in response to the semantic and auditory cues. At all ages, poor readers or spellers produced fewer words on all word-retrieval tasks than did good readers or spellers. Performance on the auditory and visual word-retrieval tasks correlated very highly with pseudoword reading and spelling ability in the two older groups; in the kindergarten children, auditory retrieval correlated with word identification. The results suggest that poor readers have not organized words in long-term memory according to rhyming families but that good readers have. We speculate that failure to retrieve rhyming words during acquisition of reading and spelling skills underlies the failure of poor readers and spellers to abstract the higher-order relationships between orthography and phonology.  相似文献   
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