全文获取类型
收费全文 | 86篇 |
免费 | 5篇 |
国内免费 | 3篇 |
专业分类
化学 | 21篇 |
力学 | 1篇 |
物理学 | 12篇 |
无线电 | 60篇 |
出版年
2023年 | 1篇 |
2022年 | 1篇 |
2021年 | 2篇 |
2020年 | 3篇 |
2019年 | 2篇 |
2018年 | 1篇 |
2016年 | 1篇 |
2015年 | 3篇 |
2014年 | 4篇 |
2013年 | 9篇 |
2012年 | 5篇 |
2011年 | 10篇 |
2010年 | 6篇 |
2009年 | 6篇 |
2008年 | 3篇 |
2006年 | 5篇 |
2005年 | 5篇 |
2004年 | 6篇 |
2003年 | 6篇 |
2002年 | 2篇 |
2001年 | 3篇 |
2000年 | 2篇 |
1999年 | 2篇 |
1998年 | 1篇 |
1997年 | 2篇 |
1995年 | 1篇 |
1994年 | 1篇 |
1984年 | 1篇 |
排序方式: 共有94条查询结果,搜索用时 772 毫秒
71.
72.
G. J. Phillips P. Shelswell 《International Journal of Satellite Communications and Networking》1984,2(1):3-8
Within Western Europe several countries have indicated their intention to start DBS services in the 12 GHz band in 1985/6 or soon after. Against this background the European Broadcasting Union has recommended a common transmission standard known as C-MAC/packet. An outline is given of the system, with a discussion of the requirements for a broadcasting satellite and receivers for individual reception. 相似文献
73.
74.
光栅式自由立体显示器概述 总被引:5,自引:0,他引:5
文章介绍了光栅式自由立体显示器的结构及原理,分析了影响其立体效果及性能的因素,如人眼调节和会聚特性、多视点技术、亮度及分辨率损失、串扰、2D/3D切换及兼容性等,并简要介绍了相应的提高立体显示效果的方法。 相似文献
75.
Panagiotis-Dimitrios Mingas Jurij Zdovc Iztok Grabnar Toma Vovk 《Molecules (Basel, Switzerland)》2021,26(6)
Monoclonal antibodies (mAbs) have been extensively developed over the past few years, for the treatment of various inflammatory diseases. They are large molecules characterized by complex pharmacokinetic and pharmacodynamic properties. Therapeutic drug monitoring (TDM) is routinely implemented in the therapy with mAbs, to monitor patients’ treatment response and to further guide dose adjustments. Serum has been the matrix of choice in the TDM of mAbs and its sampling requires the visit of the patients to laboratories that are not always easily accessible. Therefore, dried blood spots (DBS) and various microsampling techniques have been suggested as an alternative. DBS is a sampling technique in which capillary blood is deposited on a special filter paper. It is a relatively simple procedure, and the patients can perform the home-sampling. The convenience it offers has enabled its use in the quantification of small-molecule drugs, whilst in the recent years, studies aimed to develop microsampling methods that will facilitate the TDM of mAbs. Nevertheless, hematocrit still remains an obstacle that hinders a more widespread implementation of DBS in clinical practice. The introduction of novel analytical techniques and contemporary microsampling devices can be considered the steppingstone to the attempts made addressing this issue. 相似文献
76.
近十几年来,日本、欧洲和美洲等一些国家和地区相继发射了广播卫星,并开展了一系列Ku波段(12GHz)卫星直播(DBS)业务,促进了卫星电视接收技术的飞快发展,尤其是DBS平面天线的发展。本文介绍了DBS平面天线的基本原理、结构和特点。综述了DBS平面天线的技术现状和发展趋势,探讨了我国发展DBS平面天线的必要性和紧迫性。 相似文献
77.
通过多普勒波束锐化(Doppler Beam Sharpening, DBS)图像拼接可得到大范围的地面场景图像。然而实际中雷达平台的非理想运动(载机速度矢量和姿态的变化)会造成DBS图像拼接困难。为解决此问题,该文提出了一种有效的DBS图像拼接方法。首先利用惯导信息估计载机瞬时位置和雷达波束指向,然后将它们转化到初始时刻定义的参考坐标系下,得到图像校正参数。最后利用这些参数,完成图像拼接。实测数据的处理结果表明该文方法不仅较好地补偿了载机运动误差,而且与传统方法相比可以更好地改善DBS数据的拼接性能。 相似文献
78.
Vinay Kiran Abhishek Dixit Bhavesh Babulal Gabani Nuggehally R. Srinivas Ramesh Mullangi 《Biomedical chromatography : BMC》2020,34(11):e4938
Different options on performing incurred sample reanalysis (ISR) on dried blood spot (DBS) cards were investigated using drugs belonging to various therapeutic areas: (a) darolutamide (to treat prostate cancer) and (b) filgotinib (to treat rheumatoid arthritis). The proposed novel methodology included the generation of half-DBS and quarter-DBS discs after initial blood collection using the full-DBS discs. Accordingly, blood collection via DBS was performed in male BALB/c mice following intravenous and oral dosing of darolutamide; in male Sprague Dawley rats following intravenous and oral dosing of filgotinib. The ISR data generated from the full-DBS disc, half-DBS disc and quarter-DBS disc were compared for the assessment of the proposed methodology. Quantification of darolutamide and filgotinib was accomplished using liquid chromatography-electrospray ionization/tandem mass spectrometry methods. Darolutamide and filgotinib ISR samples, which were collected and prepared using full-, half- and quarter-DBS discs, met the acceptance criteria for ISR analysis. In conclusion, this is the first report showing a viable tool for the performance of ISR on DBS cards. The use of quarter- or half-DBS discs would aid in not only ISR but also in long-term storage experiments of analytes because it would avoid the need for additional blood sampling in patients. 相似文献
79.
Radoslaw Kwapiszewski Karina Kwapiszewska Jörg P. Kutter Zbigniew Brzozka 《Analytica chimica acta》2015
Lysosomal storage diseases are chronic, progressive and typically have a devastating impact on the patient and the family. The diagnosis of these diseases is still a challenge, however, even for trained specialists. Accurate diagnostic methods and high-throughput tools that could be readily incorporated into existing screening laboratories are urgently required. 相似文献
80.
Krzysztof R. Gorny Michael F. Presti Stephan J. Goerss Sun C. Hwang Dong-Pyo Jang Inyong Kim Hoon-Ki Min Yunhong Shu Christopher P. Favazza Kendall H. Lee Matt A. Bernstein 《Magnetic resonance imaging》2013