Zobrazeno 1 - 10
of 641
pro vyhledávání: '"黄立"'
Publikováno v:
Zhongshan Daxue xuebao. Yixue kexue ban, Vol 28 (2007)
[目的]采用单光子发射计算机断层扫描(SPECT)技术测定抑郁症患者的局部脑血流(rCBF),与正常对照比较脑血流灌注变化,并观察抑郁症症状与患者脑血流灌注的关系。[方法]以18例未经抗抑
Externí odkaz:
https://doaj.org/article/050885a9005a483f8e590cd4cd98004c
Publikováno v:
Journal of Modern Medicine & Health. 2/15/2024, Vol. 40 Issue 3, p522-526. 5p.
Publikováno v:
Evaluation & Analysis of Drug-Use in Hospitals of China. 2024, Issue 2, p165-172. 5p.
Publikováno v:
Applied Chemical Industry. Feb2024, Vol. 53 Issue 2, p346-350. 5p.
Publikováno v:
Guangtongxin yanjiu, Vol , p 0 (1994)
本文首先论述了用户线采用光纤传输系统的必要性。然后介绍了GHS-Ⅱ型光纤用户环路传输设备配置、电路技术方案及研究的几个主要内容。测试结果表明:该设备设计合理、技术先进
Externí odkaz:
https://doaj.org/article/794b5af5fe184a0dbdba3f5d48f19860
Publikováno v:
Journal of Agro-Environment Science; 2024, Vol. 43 Issue 8, p1786-1795, 10p
Publikováno v:
Biotechnology Bulletin; 2024, Vol. 40 Issue 8, p255-263, 9p
Autor:
黄立富
Publikováno v:
Guangtongxin yanjiu, Vol , Pp 32-41 (1981)
载波300路主群信号编码设备要求时钟频率稳定度为±20×10-6。但是,石英谐振器在宽温度(-40~+70℃)范围内的频率相对偏移量为10-5。为了满足钟频稳定度、设备小型化和开机快速工作的要求,
Externí odkaz:
https://doaj.org/article/e4cae7bd7c0a443f9bf02eb1cd505a98