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161.
Employing a Wald confidence interval to test hypotheses about population proportions could lead to an increase in Type I or Type II errors unless the hypothesized value, p0, is used in computing its standard error rather than the sample proportion. 相似文献
162.
Ken Appleton 《Research in Science Education》1983,13(1):111-119
Conclusions Beginning student teachers have already acquired very definite views about teaching science before they begin their teacher
training course. These views are generally similar to the views espoused by science educators, but are contrary to the classroom
practices of many teachers. Their views seem to have origins in what the students perceive to have been meaningful and enjoyable
learning experiences for themselves in their own schooling; and to a lesser extent for children they have observed. Female
students who have studied more science at high school tend to favour the use of worksheets in experimental work. Several interesting
questions arise from these findings:
When these students begin to teach as qualified teachers, will they still espouse the same opinions? If so, does that mean
that there is a ‘new wave’ of teachers entering the service who are more committed to hands-on activity work than their older
colleagues?
If not, what aspects of the teacher training process have caused them to change their opinions?
Will these present students be using hands-on strategies themselves after they have been teaching for some time? That is,
do system and school constraints effectively prevent teachers from using such strategies?
Can secondary science teachers do more to influence positively their students' opinions about teaching science, such as engendering
more positive attitudes to science, incorporating more hands-on work, and relying less on printed worksheets in laboratory
work?
This exploratory work has highlighted the concern expressed by Morrissey (1981) in that there is a great need for long term
longitudinal studies of student teachers' attitudes to teaching science, with a particular focus on their teaching behaviours
after graduation. 相似文献
163.
164.
Poster sessions are widely used as a medium for the communication of results by professionals at conferences and by students to their peers. The authors have introduced poster sessions into undergraduate mathematical modelling courses. This has given our students an interesting and challenging task and it has caused us to devise a scheme for the assessment of posters.This paper surveys the use of poster sessions with undergraduates, outlines the rationale for using posters with mathematics students, describes our experiences and proposes criteria to use in the assessment of student posters. 相似文献
165.
166.
Two experiments tested blocking in landmark-based search in honeybees. Honeybees in the experimental group were trained in Phase 1 with a single landmark in a constant spatial relation to the target (sugar water). In the compound training second phase, the landmark used in Phase 1 (blocking landmark) and a new landmark (blocked landmark) were presented at constant spatial relations to the target. The blocking and blocked landmarks differed from each other in color and position, and the blocking landmark retained the same spatial relationship to the target as in Phase 1. In Experiment 1, the control group experienced only Phase 2 training with two landmarks. In Experiment 2, the control group was trained with a different landmark in a different position in Phase 1. Blocking was found in both cases. 相似文献
167.
Stephen Houghton Nikki Milner John West Graham Douglas Vivienne Lawrence Ken Whiting Rosemary Tannock Kevin Durkin 《British journal of educational technology : journal of the Council for Educational Technology》2004,35(1):21-34
The motor control of 49 unmedicated boys clinically diagnosed with ADHD, case‐matched with 49 non‐ADHD boys, was assessed while playing Crash Bandicoot I, a SonyTM Playstation platform computer video game. In Crash Bandicoot participants control the movements of a small‐animated figure through a hazardous jungle environment. Operationally defined measures of motor control were designated by (1) the stage of the game completed (ie, the number of obstacles successfully passed) before losing the figure's ‘life’, (2) the level of complexity that the stage represented and (3) the time taken to get to that point during the video game play. These measures were assessed under contrasting conditions of low or high working memory and distracter loads. Four tasks were administered (totalling 12 trials), incorporating both with and without distracter conditions. For those trials with the distracter, a segment of the television show The Simpsons was simultaneously played on a television screen adjacent to the computer game monitor. A 5‐way MANOVA revealed that ADHD boys took less time to complete their trials under the direct condition (ie, no working memory load) on Crash Bandicoot, compared to their matched non‐ADHD peers. When the task required additional working memory, however, the ADHD boys took significantly longer. Cumulative frequency plots of game performance revealed that in terms of the number of obstacles completed, the control participants successfully navigated more obstacles on the low working memory load task than the ADHD participants, but that the performance of the two groups was less distinguishable on the high working memory load task. The findings have implications for assessment and management of children with ADHD. 相似文献
168.
In image retrieval, most systems lack user-centred evaluation since they are assessed by some chosen ground truth dataset. The results reported through precision and recall assessed against the ground truth are thought of as being an acceptable surrogate for the judgment of real users. Much current research focuses on automatically assigning keywords to images for enhancing retrieval effectiveness. However, evaluation methods are usually based on system-level assessment, e.g. classification accuracy based on some chosen ground truth dataset. In this paper, we present a qualitative evaluation methodology for automatic image indexing systems. The automatic indexing task is formulated as one of image annotation, or automatic metadata generation for images. The evaluation is composed of two individual methods. First, the automatic indexing annotation results are assessed by human subjects. Second, the subjects are asked to annotate some chosen images as the test set whose annotations are used as ground truth. Then, the system is tested by the test set whose annotation results are judged against the ground truth. Only one of these methods is reported for most systems on which user-centred evaluation are conducted. We believe that both methods need to be considered for full evaluation. We also provide an example evaluation of our system based on this methodology. According to this study, our proposed evaluation methodology is able to provide deeper understanding of the system’s performance. 相似文献
169.
Ken Peterson G. Manny Gunne Paul Miller Orlando Rivera 《Research in higher education》1984,20(3):309-321
Michael Scriven has suggested that student rating forms, for the purpose of evaluating college teaching, be designed for multiple audiences (instructor, administrator, student), and with a single global item for summative functions (determination of merit, retention, or promotion). This study reviewed approaches to rating form construction, e.g., factor analytic strategies of Marsh, and recommended the multiple audience design of Scriven. An empirical test of the representativeness of the single global item was reported from an analysis of 1,378 forms collected in a university department of education. The global item correlated most satisfactorily with other items, a computed total of items, items that represented underlying factors, and various triplets of items selected to represent all possible combinations of items. It was concluded that a multiple audience rating form showed distinct advantages in design and that the single global item most fairly and highly represented the overall teaching performance, as judged by students, for decisions about retention, promotion, and merit made by administrators. 相似文献
170.
During the past few years the United States has witnessed the growth of hospice care as an alternative approach for the care of the terminally ill. This paper examines a sample of patients who elected to enroll in a home hospice program. Approximately 57 percent of these patients remained at home until death. The other 43 percent chose to return to a facility where they eventually died. Evidence indicates that patients and caregivers who have more difficulty with terminal care at home are more likely to return to a facility. The analysis explores factors that explain why some patients and caregivers have a more troublesome experience with terminal care at home. Four of the factors tested are found to be related to place of death: (1) the number of visits from hospice nurses, (2) the intensity of contact with the hospice nurses, (3) length of time patients are enrolled in the hospice program, and (4) race of the patient. The implications of these findings are discussed and recommendations for delivery of hospice services are suggested. 相似文献