全文获取类型
收费全文 | 76657篇 |
免费 | 15096篇 |
国内免费 | 1280篇 |
专业分类
电工技术 | 2212篇 |
技术理论 | 6篇 |
综合类 | 1955篇 |
化学工业 | 23975篇 |
金属工艺 | 2476篇 |
机械仪表 | 3005篇 |
建筑科学 | 4071篇 |
矿业工程 | 796篇 |
能源动力 | 2100篇 |
轻工业 | 9114篇 |
水利工程 | 801篇 |
石油天然气 | 2006篇 |
武器工业 | 160篇 |
无线电 | 11368篇 |
一般工业技术 | 16473篇 |
冶金工业 | 2876篇 |
原子能技术 | 455篇 |
自动化技术 | 9184篇 |
出版年
2024年 | 121篇 |
2023年 | 566篇 |
2022年 | 953篇 |
2021年 | 1521篇 |
2020年 | 2312篇 |
2019年 | 3877篇 |
2018年 | 3971篇 |
2017年 | 4339篇 |
2016年 | 4829篇 |
2015年 | 5043篇 |
2014年 | 5469篇 |
2013年 | 7039篇 |
2012年 | 4904篇 |
2011年 | 4926篇 |
2010年 | 4807篇 |
2009年 | 4670篇 |
2008年 | 4107篇 |
2007年 | 3710篇 |
2006年 | 3446篇 |
2005年 | 2962篇 |
2004年 | 2564篇 |
2003年 | 2603篇 |
2002年 | 2550篇 |
2001年 | 2301篇 |
2000年 | 2026篇 |
1999年 | 1502篇 |
1998年 | 1141篇 |
1997年 | 835篇 |
1996年 | 711篇 |
1995年 | 553篇 |
1994年 | 526篇 |
1993年 | 362篇 |
1992年 | 303篇 |
1991年 | 240篇 |
1990年 | 189篇 |
1989年 | 180篇 |
1988年 | 141篇 |
1987年 | 112篇 |
1986年 | 106篇 |
1985年 | 58篇 |
1984年 | 71篇 |
1983年 | 64篇 |
1982年 | 34篇 |
1981年 | 43篇 |
1980年 | 29篇 |
1979年 | 22篇 |
1978年 | 22篇 |
1977年 | 31篇 |
1976年 | 58篇 |
1975年 | 13篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
The safety of patients and the quality of medical care provided to them are vital for their wellbeing. This study establishes a set of RFID (Radio Frequency Identification)-based systems of patient care based on physiological signals in the pursuit of a remote medical care system. The RFID-based positioning system allows medical staff to continuously observe the patient's health and location. The staff can thus respond to medical emergencies in time and appropriately care for the patient. When the COVID-19 pandemic broke out, the proposed system was used to provide timely information on the location and body temperature of patients who had been screened for the disease. The results of experiments and comparative analyses show that the proposed system is superior to competing systems in use. The use of remote monitoring technology makes user interface easier to provide high-quality medical services to remote areas with sparse populations, and enables better care of the elderly and patients with mobility issues. It can be found from the experiments of this research that the accuracy of the position sensor and the ability of package delivery are the best among the other related studies. The presentation of the graphical interface is also the most cordial among human-computer interaction and the operation is simple and clear. 相似文献
992.
Wang Bilin Wang Shengsheng Zhang Zhe Zhao Xin Fu Zihao 《Applied Intelligence》2022,52(12):14070-14084
Applied Intelligence - Unsupervised Domain Adaptation (UDA) aims to transfer knowledge from a label-rich source domain to an unlabeled target domain with a different but related distribution.... 相似文献
993.
Liang Likeng Hao Tianyong Zhan Choujun Qiu Hong Wang Fu Lee Yan Jun Weng Heng Qu Yingying 《Neural computing & applications》2022,34(19):16311-16324
Neural Computing and Applications - Medical concept normalization aims to construct a semantic mapping between mentions and concepts and to uniformly represent mentions that belong to the same... 相似文献
994.
Composite Materials Based on Shape‐Memory Ti2NiCu Alloy for Frontier Micro‐ and Nanomechanical Applications 下载免费PDF全文
995.
996.
997.
Catheter‐related fungal endocarditis caused by Candida parapsilosis in a hemodialysis patient 下载免费PDF全文
Ying Shu Shaobin Yu Ling Zha Ping Fu Tianlei Cui 《Hemodialysis international. International Symposium on Home Hemodialysis》2017,21(4):E66-E68
Fungal endocarditis (FE) is commonly regarded as a rare but fatal disease. The incidence of infective endocarditis (IE) in hemodialysis (HD) patients is thought to be obviously higher than that in the general population. Moreover, IE occurs more likely in HD patients with catheters. With the increase of HD population and extensive use of catheters in HD patients, FE, as a special form of IE, may increase and bring new challenges to clinicians. We reported a case of FE associated with catheter infection in a 44‐year‐old woman on HD. The risk factors and treatment strategies of FE in HD patients were discussed. 相似文献
998.
Chao‐Yu Li Zhen‐Wei Yang Jin‐Chao Dong Tapan Ganguly Jian‐Feng Li 《Small (Weinheim an der Bergstrasse, Germany)》2017,13(8)
Shell‐isolated nanoparticle‐enhanced Raman spectroscopy (SHINERS), due to its versatility, has been able to break the long‐term limitations of the material‐ and substrate‐specific generalities in the traditional field of surface‐enhanced Raman spectroscopy. With a shell‐isolated work principle, this method provides an opportunity to investigate successfully in surface, biological systems, energetic materials, and environmental sciences. Both the shell material and core morphology are being improved continuously to meet the requirements in diverse systems, such as the electrochemical studies at single crystal electrode surfaces, in situ monitoring of photoinduced reaction processes, practical applications in energy conversion and storage, inspections in food safety, and the surface‐enhanced fluorescence. Predictably, the concept of shell‐isolated nanoparticle‐enhancement could be expanded to the wider range for the performance of plasmon‐enhanced spectral modifications. 相似文献
999.
A Mussel‐Inspired Conductive,Self‐Adhesive,and Self‐Healable Tough Hydrogel as Cell Stimulators and Implantable Bioelectronics 下载免费PDF全文
1000.
Jeanne Volatron Florent Carn Jelena Kolosnjaj‐Tabi Yasir Javed Quoc Lam Vuong Yves Gossuin Christine Ménager Nathalie Luciani Gaëlle Charron Miryana Hémadi Damien Alloyeau Florence Gazeau 《Small (Weinheim an der Bergstrasse, Germany)》2017,13(2)
Proteins implicated in iron homeostasis are assumed to be also involved in the cellular processing of iron oxide nanoparticles. In this work, the role of an endogenous iron storage protein—namely the ferritin—is examined in the remediation and biodegradation of magnetic iron oxide nanoparticles. Previous in vivo studies suggest the intracellular transfer of the iron ions released during the degradation of nanoparticles to endogenous protein cages within lysosomal compartments. Here, the capacity of ferritin cages to accommodate and store the degradation products of nanoparticles is investigated in vitro in the physiological acidic environment of the lysosomes. Moreover, it is questioned whether ferritin proteins can play an active role in the degradation of the nanoparticles. The magnetic, colloidal, and structural follow‐up of iron oxide nanoparticles and proteins in lysosome‐like medium confirms the efficient remediation of potentially harmful iron ions generated by nanoparticles within ferritins. The presence of ferritins, however, delays the degradation of particles due to a complex colloidal behavior of the mixture in acidic medium. This study exemplifies the important implications of intracellular proteins in processes of degradation and metabolization of iron oxide nanoparticles. 相似文献