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Search Results: 1 - 10 of 17712 matches for " 缪育博 "
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用于1.55μm InGaAsP/InP DFB激光器的λ/4相移衍射光栅
,张静媛,王圩
半导体学报 , 1991,
Abstract: 采用全息二次曝光的方法,研制出用于 1.55μm InGaAsP/InP DFB激光器的,具有 λ/4相移的二级光栅,并通过扫描电镜(SEM)证明了相移的存在.本文分析了制备该种光栅的工艺原理,并提出了改善此种光栅质量的新方法.
低阈值1.5μm平面掩埋脊型(PBR)分布反馈激光器
王圩,张静媛,汪孝杰,田慧良,,张济志,王宝军
半导体学报 , 1992,
Abstract: 采用质子轰击的PBR 结构,研制了室温阈电流小于15mA,高稳定单纵模输出的1.5μmDFB激光器.为今后研制长寿命无致冷1.5μmDFB激光器组合件奠定了基础,在大温度范围(-40-+60℃)和大工作电流范围(1.2-3I_(th)内可稳定单纵模工作,边模抑制比(SMSR)可达30dB以上.静态线宽一般为30-40MHz,最窄可低于20MHz.器件经50℃恒功加速老化实验,外推20℃连续工作时间已超过3000小时无显著退化迹象.本器件已首次在国内做为信号源成功地用在140Mb/S相干光通信系统上.
有向双圈图的第二小斜能量
The Second Minimal Skew Energy of Oriented Bicyclic Digraphs
 [PDF]

, 冶成福
Advances in Applied Mathematics (AAM) , 2015, DOI: 10.12677/AAM.2015.42010
Abstract:
斜能量在化学能量方面具有广泛的应用,由于共轭分子的量子化学的一个重要特性是它的π-电子能量。在本篇文献中,我们通过比较有向双圈图的斜特征多项式的系数,给出有向双圈图的斜能量的偏序关系,从而得到有向双圈图的第二小斜能量。
The energy of a graph has closed links to chemistry, since an important quantum-chemical cha-racteristic of a conjugated molecule is its total π-electron energy. In this paper, we compared the characteristic polynomial coefficients of oriented bicyclic graphs and gave the skew energy’s partial relation of oriented bicyclic graphs, and thus we got the second minimal skew energy of oriented bicyclic graphs.
1.5μm InGaAsP/InP脊型波导分布反馈激光器
王圩,张静媛,田慧良,,汪孝杰,马朝华,王丽明,吕卉,高俊华,高洪海
半导体学报 , 1989,
Abstract: 用两次液相外延制备了1.5μm InGaAsP/InP脊型波导分布反馈激光器.室温下无扭折直流光功率超过6mW,阈值电流为34mA,单面外微分量子效率高达33%.在室温附近的稳定单纵模工作温度范围超过43℃,波长温度系数为0.9A/K.在1.6mW输出光功率下的静态线宽为60MHz.在1GHz正弦调制下仍为单纵模输出.
Etching Technique of Diffraction Gratings in InP and InGaAsP
InP和InGaAsP晶体上衍射光栅的刻制技术

Zheng Yuhong/Institute of Semiconductors,Academia SinicaMiao Yubo/Institute of Semiconductors,Academia SinicaTian Huiliang/Institute of Semiconductors,Academia SinicaSi Yuancheng/Institute of Semiconductors,Academia SinicaZhang Jingyuan/Institute of Semiconductors,Academia Sinica,
,,田慧良,姒元宬,张静媛

半导体学报 , 1988,
Abstract: 采用全息光刻的技术,在InP 和InGaAsP晶体上刻制亚微米衍射光栅,获得较好的重复性和均匀性,并已应用于研制长波长分布反馈激光器.
用透析膜从琼脂糖胶中回收DNA片段
,
遗传 , 1989,
Abstract: 分离与回收DNA片段是基因操作的重要环节之一。本文介绍了一个用透析膜从琼脂糖胶中回收DNA片段的改进方法。利用本法回收DNA片段洗脱容易、节约时间、回收率在80%左右。回收的DNA片段可用于酶切反应、连接反应和用缺口位移反应制备~(32)P标记DNA探针。
A PRELIMINARY STUDY OF HUAIHE RIVER DELTA
淮河三角洲的初步研究

陈希祥,锦洋,
海洋科学 , 1983,
Abstract: The occurence, development and evolution of Huaihe River delta were studied for the first time by analyzing its geological data. Some conclusions reached are as follows. 1. The delta was formed during early and middle stages of Holocene as revealed by sedimentary sequence of Huaihe River delta both horizontally and vertically. The later reformation of Huanghe River delta started after Huanghe River captured Huaihe River. 2. In the course of its formation, the delta,owing to its changing of velocity has undergone several stages of formationdestruction-formation. 3. The formations of Haizhou Gulf low-plain and Lixiahe lagoon and low-lying land were fouud to be closely related to the growth of Huaihe River delta in northern Jiangsu coastal zone. 4. Transgression advanced progressively in Holocene. Yet the swift and violent deposition of the continental substance destroyed the continuance of the transgression in Holocene.
纤毛虫分子系统发育学的研究进展
,,沈韫芬
动物学杂志 , 2002,
Abstract:
淮河三角洲的初步研究
陈希祥,锦洋,
海洋科学 , 1983,
Abstract:
土壤热扩散率及其温度、热通量计算方法的比较研究
,刘树华,吕世华,张宇
地球物理学报 , 2012, DOI: 10.6038/j.issn.0001-5733.2012.02.008
Abstract: 本文利用绿洲系统能量与水分循环过程观测试验的2005年6月11日至15日在甘肃金塔绿洲中部观测的土壤温度、湿度和通量资料,在分析了观测期间土壤温度、湿度和通量特征的基础上,采用振幅法、相位法、谐波法和热传导对流法计算了5~20cm土壤层的土壤热扩散率.在此基础上,以深度为5cm的土壤层为上边界条件,计算了10cm、20cm深度的土壤温度和10cm深度的热通量.结果表明:谐波法能很好地计算土壤温度,10cm和20cm深度的计算值相对观测值的标准差分别为:0.21℃和0.18℃;热传导对流法计算的土壤温度好于振幅法和相位法,但由于忽略了土壤水分通量密度的日变化,该方法用于土壤含水量有明显日变化的浅层土壤时,会出现计算误差.谐波法的计算土壤热通量与实测值最为接近,计算值与实测值的相关系数达到0.868.
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