首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   19987篇
  免费   2325篇
  国内免费   550篇
耳鼻咽喉   253篇
儿科学   297篇
妇产科学   261篇
基础医学   1659篇
口腔科学   301篇
临床医学   5258篇
内科学   1563篇
皮肤病学   88篇
神经病学   1404篇
特种医学   1284篇
外科学   1978篇
综合类   3511篇
现状与发展   1篇
一般理论   3篇
预防医学   2471篇
眼科学   238篇
药学   960篇
  257篇
中国医学   844篇
肿瘤学   231篇
  2024年   132篇
  2023年   539篇
  2022年   991篇
  2021年   1277篇
  2020年   1328篇
  2019年   943篇
  2018年   877篇
  2017年   980篇
  2016年   849篇
  2015年   821篇
  2014年   1737篇
  2013年   1978篇
  2012年   1338篇
  2011年   1284篇
  2010年   1059篇
  2009年   917篇
  2008年   873篇
  2007年   777篇
  2006年   640篇
  2005年   541篇
  2004年   428篇
  2003年   371篇
  2002年   301篇
  2001年   242篇
  2000年   201篇
  1999年   148篇
  1998年   134篇
  1997年   124篇
  1996年   126篇
  1995年   99篇
  1994年   81篇
  1993年   78篇
  1992年   97篇
  1991年   56篇
  1990年   52篇
  1989年   40篇
  1988年   43篇
  1987年   41篇
  1986年   30篇
  1985年   31篇
  1984年   47篇
  1983年   29篇
  1982年   24篇
  1981年   26篇
  1980年   24篇
  1979年   18篇
  1978年   17篇
  1977年   19篇
  1975年   13篇
  1971年   11篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
A feedforward network is used to recognize short, digitized, isolated utterances. A high, multispeaker recognition rate is achieved with a small vocabulary with a single training utterance. This approach makes use of the pattern recognition property of the network architecture to classify different temporal patterns in the multidimensional feature space. The network recognizes the utterances without the need of segmentation, phoneme identification, or time alignment. We train the network with four words spoken by one single speaker. The network is then able to recognize 20 tokens spoken by 5 other speakers. We repeat the above training and testing procedure using a different speaker's utterances for training each time. The overall accuracy is 97.5%. We compare this approach to the traditional dynamic programming (DP) approach, and find that DP with slope constraints of 0 and 1 achieve 98.5% and 85% accuracies respectively. Finally we validate out statistics by training and testing the network of a four-word subset of the Texas Instruments (Tl) isolated word database. The accuracy with this vocabulary exceeds 96%. By doubling the size of the training set, the accuracy is raised to 98%. Using a suitable threshold, we are able to raise the accuracy of one network from 87% to 98.5%. Thresholding applied to all networks would then raise the overall accuracy to well over 99%.

This technique is especially promising because of the low overhead and computational requirements, which make it suitable for a low cost, portable, command recognition type of application.  相似文献   

72.
瞄准前沿以人为本全面提升医院的综合竞争力   总被引:3,自引:3,他引:0  
介绍了医院创新工作思路和瞄准国际前沿,高起点培训专业技术人才,全面提升医院综合竞争力的主要做法及取得的成效.  相似文献   
73.
The Diploma in Clinical Dentistry (Conscious Sedation and Pain Control) of the Faculty of Dentistry, University of Sydney, is the first dedicated programme devoted to this field in Australia. Its development followed a decision by the Dental Board of New South Wales to require a formal qualification from the University of Sydney before dental practitioners could offer sedation and pain management in practice.
The programme is conducted at Westmead Hospital in conjunction with the Department of Anaesthetics, and satisfies the guidelines developed by the Royal Australasian College of Dental Surgeons and the Royal Australasian College of Surgeons.
The course is conducted either over one or two years, with block sessions requiring attendance at Westmead Hospital, together with assignments which are completed outside the block sessions. In this way, a dental practitioner enrolled in the programme is able to continue practice.
The block sessions need not be completed over one year, but must be completed within two years.  相似文献   
74.
Described five professional challenges that will affect the future development of pediatric psychology: specialization and professional identity, relationships with other professions, securing resources necessary for effective functioning, the conflict between clinical service delivery and prevention, and development of training models. To meet these challenges, pediatric psychologists need to maintain strong connections with other psychologists, develop new models of collaborative training, practice, and research, emphasize prevention activities, and enhance the scientific basis of pediatric psychology through innovative training programs and support for faculty development.  相似文献   
75.
目的:评估中澳农村卫生综合项目乡镇卫生院院长管理知识培训效果。方法:采用问卷调查、焦点组访谈、个人深入访谈、现场走访等方法进行现况调查。结果:多数卫生院院长在管理基础知识的收获、分析问题的能力、观念的转变、管理行为的改变、员工士气的提高、卫生服务的改善方面都有所提高;被调查的三所中心乡卫生院的所有职工都认为所在卫生院近半年来的工作总体上有所改进;病人及周围居民对三所卫生院的总体满意度都在55%以上。结论:乡镇卫生院管理培训效果良好。  相似文献   
76.
77.
A new approach designed to establish the most suitable area for eccentric viewing and to teach and train patients with severe age-related macular degeneration (AMD) to use the eccentric viewing technique is described. Using a computer and video display based system, as well as software written specifically for this purpose, we investigated and trained ten consecutive patients with AMD. The patients were 80.1 ± 5.6 years old, on average. All of them had an absolute central scotoma. Mean visual acuity was 0.035 ± 0.016. After 30 min of testing, instruction and reading on the screen, followed by 2.6 ± 0.69 one-hour training sessions, on average, with the low vision therapist, reading newspaper and book texts with the aid of hyperoculars or aplanatic systems and a very short reading distance, the patients achieved a reading speed of 58.9 ± 19.7 words/min, significantly (p<0.001) higher than the initial speed when reading on the screen, 11.5 ± 4.5 words/min.  相似文献   
78.
开展卫勤指挥员任职培训的教学实践和体会   总被引:1,自引:1,他引:0  
近几年来,第二军医大学卫生勤务学系承担了大量卫勤指挥员的任职培训任务.通过几年的理论研究和实践摸索,在教学的组织、管理、实施、保障等方面积累了一些经验,获得了一些具体的体会.我们认为要做好卫勤指挥员的任职培训教学必须明确培训目标,科学制定教学方案,精心安排教学内容,做好施训教员的培训,并在教学中注重合理运用教学方法,特别是要做好下部队调研,切实提高教学实效.  相似文献   
79.
目的探讨脑梗死偏瘫患者早期康复治疗的方法和效果。方法对100例脑梗死偏瘫患者分组进行分期康复治疗。结果87例获得满意的治疗效果,12例较差,1例死亡。结论对脑梗死偏瘫患者在不同时期采取不同的康复治疗方法,能有效改善其肢体运动功能,提高生活能力,且康复治疗开始越早效果越明显。  相似文献   
80.
目的 探讨高温高湿环境下守岛官兵训练前后脑血流和脑电生理的变化,为临床防治热致疾病提供依据.方法 从守岛官兵中随机抽取在常温常湿环境下温度(27.40±1.37)℃,湿度(50.25±6.76)%]新兵100名为常温新兵组,高温高湿环境下(温度≥35℃,湿度≥80%)新兵100名为高温新兵组;高温高湿环境下服役2~3 年的官兵100名为高温老兵组.受试者负重15 kg,分次在3000 m/15 min,5000 m/30 min和10 000 m/45 min内完成跑步训练.10 000 m训练后,根据受试者脑血流高低又分为脑血流增高组(24名)、脑血流降低组(46名)和脑血流正常组(230名).训练前后行经颅多普勒血流诊断仪和脑电图仪检测.结果 (1)3000 m训练后3组受试官兵脑平均血流速度(Vm)较训练前均显著增高(P<0.01),但5000 m和10 000 m训练后,常温新兵组降低6%和16%,高温老兵组降低5%和15%,高温新兵组降低14%和31%,比常温新兵组和高温老兵组低(P<0.01);(2)10 000 m训练前后3组脑电图均在正常范围,3组比较差异无统计学意义(P>0.05);(3)10 000 m训练后脑血流增高组和降低组脑电图比正常血流组活跃(P<0.01).结论 高温高湿环境下10 000 m训练对官兵的脑血流有较大的影响,但对脑电生理无影响,老兵在此环境下则表现出较好的热耐受力和适应性.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号