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Search Results: 1 - 10 of 67146 matches for " 倪世俊 "
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mosfet驱动的单脉冲选择器
杨天新,,忱
强激光与粒子束 , 1999,
Abstract: ?详细地介绍了用高耐压大电流mosfet驱动电光晶体构成单脉冲选择器的优点,阐述了适用于实现快速光开关的电光晶体的特性以及制作mosfet驱动电路中的难点和相应的解决办法。实验显示该选择器可达到5ns的光开关速度。
珊瑚的组织和细胞培养研究进展
Advances in the Tissue and Cell Culture of Corals
 [PDF]

陆琼选, , 郭华荣
Adances in Marine Sciences (AMS) , 2016, DOI: 10.12677/AMS.2016.32007
Abstract:
珊瑚的组织和细胞的体外培养可为研究珊瑚的互惠共生、细胞毒理、环境胁迫和生物矿化等方面提供有效的研究工具和手段。本文综述了珊瑚细胞的分离与培养、珊瑚细胞团和组织球的制备及其应用,并对珊瑚的组织和细胞培养的研究前景进行了展望。
In vitro cultured tissues and cells of corals can provide a useful tool for studies on the symbiosis between coral and zooxanthellae, cytotoxicology, environmental stress and biomineralization in corals. This paper has reviewed the progress in the dissociation and culture of coral cells, prepa-ration of cell aggregates and tissue balls of corals and their application. The future prospect of the tissue and cell culture of corals is also predicted.
Generation of high-quality soliton pulses using all-fiber optical compressor
全光纤脉冲压缩器的理论及实验研究

丁永奎,李智勇,,葛春风,
物理学报 , 2004,
Abstract: In this paper, optical pulse compression using a dispersion shift fiber and a standard single-mode fiber is demonstrated both analytically and experimentally. The effects of fiber and input pulse parameters on the compressing quality are discussed through numerical simulation. Experimental results of compressing pulses generated from a harmonically mode-locked fiber laser verify that high-quality pulses can be obtained using this compression method.
台党参与潞党参若干性状差异的研究
白效令,,杨槐,杨又花,
华北农学报 , 1991, DOI: 10.3321/j.issn:1000-7091.1991.04.021
Abstract: 通过对台党参和潞党参的植物学特征的调查,花粉扫描电镜观察.根导管解剖构造电镜观察,种子表皮纹饰扫描电镜观察以及正反交杂交试验,发现二者在植物学特征、主根环纹长度、花粉极/赤比及表面纹饰、根系导管形态等方面均存在着明显差异,尤其是交配不实,说明二者不是一个类型.
AN ANALYSIS OF PARAMETER CONSTANCY OF LIGHT BEAM FOR MULTILENS RESONATORS
多透镜谐振腔光束参数不变性研究

LI SHI-CHEN,NI WEN-JUN,YU JIAN,
,,于建

物理学报 , 1989,
Abstract: 给出了多透镜光学谐振腔的解析,分析了透镜腔光束参数的动态特性。提出一种补偿热焦距变化的影响的新观念,从而给出一种新形式的热稳定谐振腔——控制型热稳腔,或称软性腔。
Wide Broadband Supercontinuum Generated in Conventional Dispersion-shifted Fiber
利用普通色散位移光纤得到的超宽带超连续谱

Ministry of Education,Tianjin,
王肇颖
,李智勇,王永强,,林冉,

光子学报 , 2004,
Abstract: The whole evolution of supercontinuum(SC) is observed experimentally and explained theoretically. Widely broadened SC spectra are generated from 1311 nm to 1780 nm in 2.5 km conventional dispersion-shifted fiber with 55 mW average pump power. Over more than 196 nm spectrum region on the long wavelength side with ±1 dB uniformity is obtained. More than 92 and 46 channels with flattop are sliced from the SC by an F-P filter. By using only 100 m the same type of fiber, we obtained 453.3 nm,20 dB bandwidth covers S-, C-, and L-band seamlessly.
色散平坦光纤中的超连续谱
贾东方,王永强,王肇颖,,林冉,丁永奎,
天津大学学报(自然科学与工程技术版) , 2005,
Abstract: 利用光纤中的超连续(sc)谱展宽技术,能够在很宽的光谱范围内同时获得多个高重复率、多波长超短脉冲,是一种有效的超短脉冲光源产生方法.本文利用重复频率为13.9mhz,脉宽1.5ps的超短脉冲泵浦色散平坦光纤(dff),在三阶非线性效应(自相位调制、交叉相位调制、受激喇曼散射)和色散联合作用下得到总宽度510nm以上的sc光谱,并在宽150nm的谱段内获得不平坦度小于±0.25db,且覆盖全部l波段的sc谱;用可调谐滤波器在此区段谱切片滤波,并得到脉宽基本相同的接近变换限的超短脉冲.
旋转喷射灌浆成柱法试验初步成功

工业建筑 , 1974, DOI: 10.13204/j.gyjz197406007
Abstract: 在批林批孔运动推动下,交通部科学研究院遵照毛主席关于"自力更生,艰苦奋斗,破除迷信,解放思想"的教导,深入施工现场,实行三结合,积极试验采用旋转喷射灌浆成桩的新方法。经过五个多月的奋战,初
超高压力下液体介质的性质
,
力学与实践 , 1987,
Abstract: 本文提供了关于高压下液体传压介质的数据,并提出了两种实际应用的液体传压介质的方案。
超高压力测试的探讨
,
力学与实践 , 1986,
Abstract: 近几十年来,在高压物理、地球物理以及核爆炸防护工程等研究中,使用了压力达几万、甚至几十万大气压的超高流体静压力装置。利用超高压力;可以探讨新物质的合成、新相的转
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