全文获取类型
收费全文 | 1414篇 |
免费 | 68篇 |
国内免费 | 16篇 |
专业分类
耳鼻咽喉 | 8篇 |
儿科学 | 19篇 |
妇产科学 | 13篇 |
基础医学 | 175篇 |
口腔科学 | 11篇 |
临床医学 | 96篇 |
内科学 | 329篇 |
皮肤病学 | 38篇 |
神经病学 | 107篇 |
特种医学 | 41篇 |
外科学 | 270篇 |
综合类 | 11篇 |
预防医学 | 235篇 |
眼科学 | 18篇 |
药学 | 70篇 |
中国医学 | 4篇 |
肿瘤学 | 53篇 |
出版年
2024年 | 3篇 |
2023年 | 6篇 |
2022年 | 33篇 |
2021年 | 63篇 |
2020年 | 25篇 |
2019年 | 55篇 |
2018年 | 63篇 |
2017年 | 30篇 |
2016年 | 50篇 |
2015年 | 48篇 |
2014年 | 72篇 |
2013年 | 82篇 |
2012年 | 126篇 |
2011年 | 148篇 |
2010年 | 79篇 |
2009年 | 68篇 |
2008年 | 79篇 |
2007年 | 84篇 |
2006年 | 69篇 |
2005年 | 64篇 |
2004年 | 44篇 |
2003年 | 48篇 |
2002年 | 30篇 |
2001年 | 17篇 |
2000年 | 18篇 |
1999年 | 14篇 |
1998年 | 4篇 |
1997年 | 2篇 |
1996年 | 2篇 |
1995年 | 4篇 |
1993年 | 3篇 |
1992年 | 4篇 |
1991年 | 9篇 |
1990年 | 6篇 |
1989年 | 4篇 |
1988年 | 6篇 |
1987年 | 6篇 |
1986年 | 4篇 |
1985年 | 6篇 |
1984年 | 3篇 |
1983年 | 1篇 |
1981年 | 1篇 |
1980年 | 2篇 |
1979年 | 2篇 |
1977年 | 3篇 |
1975年 | 3篇 |
1971年 | 3篇 |
1970年 | 1篇 |
1966年 | 1篇 |
排序方式: 共有1498条查询结果,搜索用时 31 毫秒
1.
2.
E K Amine A K Amine M S Eldin N Zaghloul 《The Journal of the Egyptian Public Health Association》1991,66(1-2):193-208
The aim of this study was to evaluate the public opinion towards the possible replacement of ration cards by cash payment and to investigate the effect of partial termination of food price subsidy programme on food consumption by families from different income brackets. A purposive sample of 300 families from Alexandria Governorates were interviewed to assess the attitude of the consumer towards the possible termination of current food subsidy programme. After one year, during which the subsidy programme was reduced, a follow up sample of 240 were interviewed. The results show that a large proportion of the families prefer the continuation of the current programme (80-81.2%), meanwhile, around 90% of them believed that subsidized foods do not reach the target group. The data show that subsidized meat and poultry are consumed by high income families while frozen subsidized fish was mostly consumed by poor families. The partial termination of the subsidy programme forced the families to reduce their consumption from sugar, tea, oil, and rice. During the second phase of the study. However the results show that high income families were least affected by the partial termination of the subsidy programme. 相似文献
3.
4.
5.
6.
A. Bezza R. Niamane B. Amine A. El Maghraoui R. Bensabbah N. Hajjaj-Hassouni 《Revue du Rhumatisme》2004,71(12):1155-1158
Objective. – To describe the clinical and radiological features of foot involvement in patients with psoriatic arthritis.Methods. – We retrospectively reviewed the medical records of patients admitted between 1972 and 1999 for psoriatic arthritis with involvement of the foot. We included all patients who had peripheral and/or axial, asymmetric, chronic inflammatory joint disease meeting or not Avila's radiological criteria for psoriatic arthritis, with or without other imaging findings suggestive of psoriatic arthritis and with or without psoriasis.Results. – Twenty-six patients were included. Inflammatory heel pain was reported by 14 patients, whereas forefoot involvement was found in only seven patients. Sausage toe was present in two patients. None of the patients had Bauer's toe (combining arthritis and psoriatic skin and/or nail changes) or psoriatic onychopachydermoperiostitis of the great toe. Radiological abnormalities were found in 20 patients. Half the patients had calcaneal changes. Osteoperiostitis of the great toe was noted in two patients and mushrooming in five.Discussion. – The features of psoriatic arthritis in Morocco seem similar to those in other countries. Hindfoot involvement was present in 53% of patients. Involvement of the forefoot was rarely recorded in the charts, suggesting missed cases because of insufficient attention to the forefoot during the physical examination and availability of anteroposterior radiographs only. Oblique views (Hirtz and Chaumet) should be obtained because they give a clearer image of the distal part of the toes, which is often difficult to analyze on anteroposterior films. 相似文献
7.
Sidi Mohammed El Amine Debbal 《Journal of medical engineering & technology》2020,44(7):396-410
Abstract Heart auscultation has been recognised for a long time as an important tool for the diagnosis of heart disease; it is the most common and widely recommended method to screen for structural abnormalities of the cardiovascular system. Detecting relevant characteristics and forming a diagnosis based on the sounds heard through a stethoscope, however, is a skill that can take years to be acquired and refine. The efficiency and accuracy of diagnosis based on heart sound auscultation can be improved considerably by using digital signal processing techniques to analyse phonocardiographic (PCG) signals. The study of the functioning of the heart is very important for the diagnosis of different cardiac pathologies. The phonocardiogram signal (PCG) is the signal generated after conversion of the sound noises coming from the heart into an electrical signal, it groups together a set of four cardiac noises (S1, S2, S3, S4) which are in direct correlation with cardiac activity. The short-term Fourier Transform (STFT) is an analytical technique that describes the evolution of the time and frequency behaviour of these four heart sounds. A statistical study has been carried out in this direction in order to better highlight the characteristics of the PCG signal. A fairly high number of cycles (twenty) was used to further refine the expected results. The objective of this paper is to use a statistical analysis based on the results obtained by the use of The STFT technic this in order to find statistical parameters (mean, standard deviation, etc.) which can give us a clear vision of the electrophysiological behaviour of the phonocardiogram signal. This aspect has not been done so far and which however can give appreciable practical results. 相似文献
8.
Rademakers R Melquist S Cruts M Theuns J Del-Favero J Poorkaj P Baker M Sleegers K Crook R De Pooter T Bel Kacem S Adamson J Van den Bossche D Van den Broeck M Gass J Corsmit E De Rijk P Thomas N Engelborghs S Heckman M Litvan I Crook J De Deyn PP Dickson D Schellenberg GD Van Broeckhoven C Hutton ML 《Human molecular genetics》2005,14(21):3281-3292
9.
John Timothy Wright Mary Fete Holm Schneider Madelaine Zinser Maranke I. Koster Angus J. Clarke Smail Hadj‐Rabia Gianluca Tadini Nina Pagnan Atila F. Visinoni Birgitta Bergendal Becky Abbott Timothy Fete Clark Stanford Clayton Butcher Rena N. D'Souza Virginia P. Sybert Maria I. Morasso 《American journal of medical genetics. Part A》2019,179(3):442-447
An international advisory group met at the National Institutes of Health in Bethesda, Maryland in 2017, to discuss a new classification system for the ectodermal dysplasias (EDs) that would integrate both clinical and molecular information. We propose the following, a working definition of the EDs building on previous classification systems and incorporating current approaches to diagnosis: EDs are genetic conditions affecting the development and/or homeostasis of two or more ectodermal derivatives, including hair, teeth, nails, and certain glands. Genetic variations in genes known to be associated with EDs that affect only one derivative of the ectoderm (attenuated phenotype) will be grouped as non‐syndromic traits of the causative gene (e.g., non‐syndromic hypodontia or missing teeth associated with pathogenic variants of EDA “ectodysplasin”). Information for categorization and cataloging includes the phenotypic features, Online Mendelian Inheritance in Man number, mode of inheritance, genetic alteration, major developmental pathways involved (e.g., EDA, WNT “wingless‐type,” TP63 “tumor protein p63”) or the components of complex molecular structures (e.g., connexins, keratins, cadherins). 相似文献
10.