全文获取类型
收费全文 | 1847篇 |
免费 | 28篇 |
国内免费 | 5篇 |
专业分类
教育 | 1446篇 |
科学研究 | 88篇 |
各国文化 | 28篇 |
体育 | 144篇 |
综合类 | 10篇 |
文化理论 | 14篇 |
信息传播 | 150篇 |
出版年
2022年 | 22篇 |
2021年 | 27篇 |
2020年 | 44篇 |
2019年 | 48篇 |
2018年 | 66篇 |
2017年 | 84篇 |
2016年 | 90篇 |
2015年 | 51篇 |
2014年 | 47篇 |
2013年 | 378篇 |
2012年 | 57篇 |
2011年 | 44篇 |
2010年 | 61篇 |
2009年 | 42篇 |
2008年 | 58篇 |
2007年 | 56篇 |
2006年 | 53篇 |
2005年 | 49篇 |
2004年 | 50篇 |
2003年 | 40篇 |
2002年 | 42篇 |
2001年 | 30篇 |
2000年 | 29篇 |
1999年 | 25篇 |
1998年 | 23篇 |
1997年 | 13篇 |
1996年 | 21篇 |
1995年 | 19篇 |
1994年 | 24篇 |
1993年 | 22篇 |
1992年 | 17篇 |
1991年 | 19篇 |
1990年 | 17篇 |
1989年 | 16篇 |
1988年 | 11篇 |
1987年 | 16篇 |
1986年 | 5篇 |
1985年 | 18篇 |
1984年 | 13篇 |
1983年 | 10篇 |
1982年 | 6篇 |
1981年 | 8篇 |
1980年 | 7篇 |
1979年 | 10篇 |
1977年 | 7篇 |
1976年 | 12篇 |
1974年 | 5篇 |
1971年 | 5篇 |
1885年 | 5篇 |
1880年 | 5篇 |
排序方式: 共有1880条查询结果,搜索用时 0 毫秒
41.
Noyens Dorien Donche Vincent Coertjens Liesje van Daal Tine Van Petegem Peter 《European Journal of Psychology of Education - EJPE》2019,34(1):67-86
European Journal of Psychology of Education - Previous theoretical research proposed a link between students’ academic motivation and students’ experiences of social integration, but... 相似文献
42.
The aims of the study were to modify the training impulse (TRIMP) method of quantifying training load for use with intermittent team sports, and to examine the relationship between this modified TRIMP (TRIMP(MOD)) and changes in the physiological profile of team sport players during a competitive season. Eight male field hockey players, participating in the English Premier Division, took part in the study (mean+/-s: age 26+/-4 years, body mass 80.8+/-5.2 kg, stature 1.82+/-0.04 m). Participants performed three treadmill exercise tests at the start of the competitive season and mid-season: a submaximal test to establish the treadmill speed at a blood lactate concentration of 4 mmol . l(-1); a maximal incremental test to determine maximal oxygen uptake ([V]O(2max)) and peak running speed; and an all-out constant-load test to determine time to exhaustion. Heart rate was recorded during all training sessions and match-play, from which TRIMP(MOD) was calculated. Mean weekly TRIMP(MOD) was correlated with the change in [V]O(2max) and treadmill speed at a blood lactate concentration of 4 mmol x l(-1) from the start of to mid-season (P<0.05). The results suggest that TRIMP(MOD) is a means of quantifying training load in team sports and can be used to prescribe training for the maintenance or improvement of aerobic fitness during the competitive season. 相似文献
43.
Scott Ailliet Rik Vandenberghe Toon Schiemsky Lode Van Overbeke Philippe Demaerel Wouter Meersseman David Cassiman Pieter Vermeersch 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2022,32(2)
Vitamin B12 deficiency can present with neurologic and psychiatric symptoms without macrocytic anaemia. We describe a case of late-onset cobalamin C deficiency which typically presents with normal serum vitamin B12 concentrations, posing an additional diagnostic challenge. A 23-year-old woman with decreased muscle strength and hallucinations was diagnosed with ‘catatonic depression’ and admitted to a residential mental health facility. She was referred to our hospital for further investigation 3 months later. Heteroanamnesis revealed that the symptoms had been evolving progressively over several months. Magnetic resonance imaging (MRI) of the brain showed diffuse symmetrical white matter lesions in both hemispheres. Routine laboratory tests including vitamin B12 and folic acid were normal except for a slight normocytic, normochromic anaemia. Over the next 6 weeks her symptoms deteriorated, and she became unresponsive to stimuli. A new MRI scan showed progression of the white matter lesions. The neurologist requested plasma homocysteine (Hcys) which was more than 8 times the upper limit of normal. Further testing revealed increased methylmalonic acid and the patient was diagnosed with adult-onset cobalamin C deficiency. This case illustrates that Hcys and/or methylmalonic acid should be determined in patients presenting with neuropsychiatric symptoms suggestive of vitamin B12 deficiency with a normal serum vitamin B12 to rule out a late-onset cobalamin C deficiency. 相似文献
44.
45.
William James (1919) characterises hypotheses as either live or dead. A hypothesis is live when it is taken into account as a ‘real possibility’. We follow James’ suggestion to not attribute intrinsic properties to hypotheses, but rather investigate how they came into being and look at the effects they generate. Expectations of digital technologies are a topic of vivid debate in the insurance industry. Before these expectations can become ‘live’, they have, in the first place, to be generated by market devices. We investigate how the reinsurance blogpost platform Open Minds functions as an ‘expectation generation device’ on the future of insurance markets. Combining Beckert’s work on the role of fictional expectations with the pragmatist turn in sociology of markets, we propose to study ‘expectation generation devices’, provoking expectations on economic markets. In our empirical analysis, we demonstrate the explicit fictional character of the Open Minds contributions, and analyse how a contained space of openness is generated to provoke expectations. We demonstrate how Open Minds can become live through circulation to other expectation generation sites in the insurance industry and beyond. We conclude by reflecting on the importance of expectation generation devices as a particular type of market devices. 相似文献
46.
Emer Van Ryswyk Richard Weeks Laura Bandick Michaela O’Keefe Andrew Vakulin Peter Catcheside 《European Journal of Sport Science》2017,17(2):144-151
Objectives: To improve well-being and performance indicators in a group of Australian Football League (AFL) players via a six-week sleep optimisation programme. Design: Prospective intervention study following observations suggestive of reduced sleep and excessive daytime sleepiness in an AFL group. Methods: Athletes from the Adelaide Football Club were invited to participate if they had played AFL senior-level football for 1–5 years, or if they had excessive daytime sleepiness (Epworth Sleepiness Scale [ESS] >10), measured via ESS. An initial education session explained normal sleep needs, and how to achieve increased sleep duration and quality. Participants (n?=?25) received ongoing feedback on their sleep, and a mid-programme education and feedback session. Sleep duration, quality and related outcomes were measured during week one and at the conclusion of the six-week intervention period using sleep diaries, actigraphy, ESS, Pittsburgh Sleep Quality Index, Profile of Mood States, Training Distress Scale, Perceived Stress Scale and the Psychomotor Vigilance Task. Results: Sleep diaries demonstrated an increase in total sleep time of approximately 20?min (498.8?±?53.8 to 518.7?±?34.3; p?<?.05) and a 2% increase in sleep efficiency (p?<?0.05). There was a corresponding increase in vigour (p?<?0.001) and decrease in fatigue (p?<?0.05). Conclusions: Improvements in measures of sleep efficiency, fatigue and vigour indicate that a sleep optimisation programme may improve athletes’ well-being. More research is required into the effects of sleep optimisation on athletic performance. 相似文献
47.
It is widely assumed that there is an eccentric hamstring muscle fibre action during the swing phase of high-speed running. However, animal and modelling studies in humans show that the increasing distance between musculotendinous attachment points during forward swing is primarily due to passive lengthening associated with the take-up of muscle slack. Later in the swing phase, the contractile element (CE) maintains a near isometric action while the series elastic (tendinous) element first stretches as the knee extends, and then recoils causing the swing leg to forcefully retract prior to ground contact. Although modelling studies showed some active lengthening of the contractile (muscular) element during the mid-swing phase of high-speed running, we argue that the increasing distance between the attachment points should not be interpreted as an eccentric action of the CE due to the effects of muscle slack. Therefore, there may actually be no significant eccentric, but rather predominantly an isometric action of the hamstrings CE during the swing phase of high-speed running when the attachment points of the hamstrings are moving apart. Based on this, we propose that isometric rather than eccentric exercises are a more specific way of conditioning the hamstrings for high-speed running. 相似文献
48.
Ken Yoshida 《Inter-Asia Cultural Studies》2013,14(1):36-54
This article provides an insight into the theorization of sōgō geijutsu or the work of total art during the postwar decades in Japan, primarily through the language of Hanada Kiyoteru, a notable communist critic during the 1950s, as a way to present a discursive precursor to what would be explored as intermedia in the 1960s. It is an attempt to trace the debates that were seen in journal Sōgō Bunka, which was established immediately after the war, and how the question of collectivity and collective production of art was discussed among the contributing critics, artists, and intellectuals. Totality as some may know already, is a problematic term that comes close to the wartime notion of ‘totality’, as it was employed for Japanese government's ideological deployment for its war efforts. Although the term has accrued a sinister ring, the critics mentioned in the article, especially Hanada, were determined to reclaim the term as a way of devising a postwar aesthetic-political platform. One important component of sōgō geijutsu was popular art and its relationship to the masses, as it was designed to relocate avant-garde art practices to the juncture of popular space and political praxis, while critiquing the modernist avant-garde art associated with high art. In addition to providing a fuller historiography of intermedia (or transmedia) in Japan, interrogating sōgō geijutsu also serves to shed some light on the complex and multivalent discourse of locating a ‘people’ and their communicative action. Through this history, the term totality gains a greater texture, no longer dismissible as a mere vestige of fascism in the minds of the Japanese artists and critics. 相似文献
49.
50.
John D. Van Buren 《Journal of The Franklin Institute》1866,81(4):219-223