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311.
This article outlines an experiment that leads one to discover and verify that S is a biased estimator of σ. 相似文献
312.
Rick Oser Ellen Beck Jose Luis Alvarado Valerie Ooka Pang 《Multicultural Perspectives》2014,16(1):26-34
A comprehensive school and community wellness plan was developed and implemented to transform Lemon Grove Academy for the Sciences and Humanities, an urban school, where student achievement and faculty satisfaction has soared. The school has become the center for the local neighborhood where culture, language, and equity are valued. The school's Comprehensive Wellness Plan includes student wellness, family wellness, staff/faculty wellness, and environmental wellness. 相似文献
313.
Pablo Molina-Garcia Jairo H Migueles Cristina Cadenas-Sanchez Irene Esteban-Cornejo Jose Mora-Gonzalez Maria Rodriguez-Ayllon 《Journal of sports sciences》2019,37(8):878-885
This study aimed to investigate the independent and combined associations between several fatness indicators and fitness components with functional movement quality in overweight/obese children. A total of 56 children (33 girls, aged 8–12) classified as overweight/obese according to the World Obesity Federation standard cut points, participated in this study. Participants underwent assessments of fatness [body mass index (BMI), waist circumference, and bioelectrical impedance measures], fitness [1 repetition maximum bench and leg press, and ALPHA test battery], and functional movement quality [4 tests from Functional Movement Screen TM (FMS)]. All fatness outcomes, except waist circumference, were negatively associated with total FMS score, after controlling for cardiorespiratory fitness. Cardiorespiratory fitness, lower limbs muscle strength, and speed-agility were positively associated with the total FMS score, regardless of BMI. Our results suggest that children with greater fatness indicators demonstrate lower functional movement quality independently of their fitness level, whereas children with better fitness level (i.e. cardiorespiratory fitness, lower limbs muscular strength, and speed-agility) demonstrate greater functional movement quality independently of their fatness level. However, children´s weight status seems to be more determinant than their fitness level in terms of functional movement quality, whereas being fit seems to moderately attenuate the negative influence of fatness. 相似文献
314.
Iván Clavel San Emeterio Jorge García-Unanue Eliseo Iglesias-Soler Jose Luis Felipe Leonor Gallardo 《European Journal of Sport Science》2019,19(2):217-224
Research question: The increase of physical exercise in fitness centres has turned these facilities in important active lifestyle promoters. However, only between 30% and 60% of subscribers still linked to the sports centre after a year. The aim of this study is to design a model to predict the drop out in fitness centres. Research methods: Monthly data corresponding to the actual behaviour of 14,522 members of three sport centres in Spain were recorded over the course of one year. In order to calculate the likelihood of drop out, logistic regressions were used to create predictive models for each centre. Results and findings: It was possible to predict abandonment of users of sport centres from their historical behaviour, although the predictive models obtained for each centre were not completely coincident. The effectiveness of the models was around 70%. Implications: The analysis of users’ behaviour in a fitness centre can allow to avoid the drop out and therefore the abandonment of physical activity. Segmenting the customers based on the likelihood of drop out may be useful for improving the effectiveness of the strategies of loyalty and for optimizing the organization of human and material resources. 相似文献
315.
Vicente Lizondo Jordi Caplliure-Llopis Dolores Escrivá Jose Enrique De La Rubia 《European Journal of Sport Science》2019,19(6):850-859
The objective of this study was to analyse bone quality parameters of football players with intellectual disability (ID) participating in adapted competitive football. Sixty-seven male football players with ID were studied: 22 with Down syndrome (DS) and 45 without DS. The average age was 26 years (range: 16 ? 50 years). A group of 25 age-matched sedentary individuals with ID (11 DS and 14 non-DS) and another group of 20 healthy participants of the same age group not involved in competitive football were comparatively analysed. There were no differences in the bone quality parameters when the healthy sedentary individuals were compared with both the sedentary and the football players with ID. However, the speed of sound (SOS), T-score, and estimated bone mineral density (BMD) were of higher values in the football players with ID than in the sedentary ID group (p?0.05). On comparing the football players with non-DS ID with the sedentary non-DS individuals, significant differences were noted in SOS (p?0.01), T-scores (p?0.01), and estimated BMD (p?0.01). Four of the 45 non-DS (8.9%) and none of the football players with DS had T-scores less than ?1.5. Two of the 14 sedentary non-DS participants (14.3%) had T-scores indicating osteoporosis. In summary, the ID population actively involved in football showed higher values of bone mass parameters than their sedentary ID and healthy peers. The participants with non-DS ID showed a higher prevalence of osteoporosis than the football players with DS. Participation in sports seems to prevent bone loss in individuals with ID. 相似文献
316.
Jose Ignacio Priego Quesada Pedro Pérez-Soriano Angel Gabriel Lucas-Cuevas Rosario Salvador Palmer Rosa Mª Cibrián Ortiz de Anda 《Journal of sports sciences》2017,35(14):1459-1465
ABSTRACTThe aim of this study was to assess the influence of different bike positions on the perception of fatigue, pain and comfort. Twenty cyclists underwent three tests that involved cycling for 45 min at their individual 50% peak aerobic power output while adopting different positions on the bike. Participants performed the cycling tests adopting three positions defined by two parameters (knee flexion angle [20°, 30°, 40°] and trunk flexion angle [35°, 45°, 55°]) in random order. Angles were measured using a 2D motion analysis system during cycling and applying Fonda’s correction factor. Perceptions of comfort, fatigue and pain were reported before the end of each test. The combination of 40° knee flexion and 35° trunk flexion was perceived as the most uncomfortable position. Moreover, greater knee flexion had a negative effect on trunk comfort, accompanied by greater levels of fatigue and pain perception in the anterior part of the thigh and knee. In conclusion, cyclists perceived the most comfortable position to be when the saddle height was within the recommended knee angle (30° calculated from the offset position or 40 ± 4.0° of absolute value). Upright trunk was found to be the most comfortable position for recreational cyclists, where aerodynamics is not so important. Cyclists’ bike perceptions should be taken into account when it comes to choosing the most beneficial position, since this can play a role in injury prevention and enhance cycling performance. 相似文献
317.
Juan Ignacio Pulido-Fernández Marcelino Sánchez-Rivero 《Journal of Cultural Economics》2010,34(2):111-129
As a result of globalization, the widespread use of ICTs, and advances in transport infrastructure, tourism destinations have
to confront an increasingly competitive setting. When to this one adds the saturation of some of the original markets, the
consolidation of traditional coastal destinations, and changes in client preferences and habits, it is not surprising that
cultural tourism is being seen as having considerable growth potential over the next few years. In this context, policy-makers
have been striving to better understand the cultural tourism market by attempting to segment their clients so as to adapt
their offer to the client’s needs and leave the client satisfied with the experience. Unfortunately, most studies on cultural
tourism segmentation have been purely psychographic. While this can help to explain attitudes, it fails to identify, access,
and quantify segments, and is of little use for implementing specific strategies. The aim of the present work was to study
the influence of socioeconomic and demographic variables (age, academic level, expenditure on tourism, inter alia) on the predisposition to choose cultural tourism (the “culturophile tourist”). To this end, we have developed a novel methodological
approach and applied it to the results of a survey conducted by Andalusia’s Middle Towns Initiative. The approach uses the
latent variables resulting from a latent class analysis to estimate log-linear models. 相似文献
318.
Various studies have built models, using aggregate box-office data, to predict the contribution of a motion picture’s features
to its theatrical demand. But such an approach fails to represent the heterogeneous influence of movie features on demographic
groups and is unable to assist market-segmentation decisions. We propose and illustrate a new approach for modeling the appeal
of movie features to market segments via the use of appropriate individual-specific data and canonical correlation analysis.
Specifically, through demographically detailed movie-attendance data available in Spain, we build a model of how movie features
influence the demographic composition of audiences. Via a canonical correlation analysis, we identify four dimensions underlying
the relationships between several movie features (country of origin, genre, objectionable content, stars, promotional effort,
and critical evaluations) and audience demographics (gender, age range, presence of children, education, social class, and
size of municipality). These dimensions represent the strong pairings between four moviegoer demographic profiles and four
movie-feature profiles. Our approach can potentially aid in segmentation and green-lighting decisions by matching movie features
with the most relevant segment-specific preferences. 相似文献
319.
This article presents conceptual navigation and NavCon, an architecture that implements this navigation in World Wide Web pages. NavCon architecture makes use of ontology as metadata to contextualize user search for information. Based on ontologies, NavCon automatically inserts conceptual links in Web pages. By using these links, the user may navigate in a graph representing ontology concepts and their relationships. By browsing this graph, it is possible to reach documents associated with the user desired ontology concept. This Web navigation supported by ontology concepts we call conceptual navigation. Conceptual navigation is a technique to browse Web sites within a context. The context filters relevant retrieved information. The context also drives user navigation through paths that meet his needs. A company may implement conceptual navigation to improve user search for information in a knowledge management environment. We suggest that the use of an ontology to conduct navigation in an Intranet may help the user to have a better understanding about the knowledge structure of the company. 相似文献
320.
Diana S. Ginns Sara E. Moulton Jose M. Castillo Andrew S. Jenkins Jennifer M. Hodnett 《Psychology in the schools》2020,57(7):1003-1021
Using data from a national survey of school psychologists we investigated (a) the extent to which school psychologists supported students' social–emotional and behavioral well-being using data and evidence-based practices programming, (b) how facilitators and barriers impacted school psychologists' service delivery in these areas, and (c) how participants' demographic characteristics predicted facilitators to these practices. The survey was administered to randomly selected National Association of School Psychologists' members. One hundred ninety-nine full-time, school-based school psychologists (24% response rate) completed the survey. Results indicated more practitioners reported using data to design, implement, and evaluate evidence-based strategies for social–emotional and behavioral supports (M = 3.32, SD = 0.90) than reported using evidence-based strategies themselves in these same areas (M = 3.10, SD = 1.05). School psychologists who reported more facilitators were more likely to use data and engage in evidence-based practices related to social–emotional and behavioral supports for students. Results also indicated certain barriers impeded school psychologists' practices in these areas. Few demographic characteristics predicted the presence of facilitators or barriers. Findings from the current study extend the extant literature by providing empirical data on facilitators of and barriers to services related to school psychologists' use of data and evidence-based practices in these areas. 相似文献