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Search Results: 1 - 10 of 270126 matches for " <br>田耀华 "
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Steady-State and Transient Model of TIGBT
TIGBT的稳态和瞬态模型

Zhang Li,Lu Yaohua,Tian Lilin,<br>张莉,耀华,立林
半导体学报 , 2003,
Abstract: A model for the steady-state and transient characteristics of the trench insulated gate bipolar transistor (TIGBT) is presented according to its physical structure.This model takes into account not only the turn-off characteristic influenced by high-doped buffer layer that is working in low-level injection condition,but also the on-state characteristic influenced by trench gate that modulates the conduction of base.As a result of comparison with numerical simulation,this model is valid for circuit simulation.
An Analytical Model of Electron Mobility for Strained-Si Channel nMOSFETs
应变硅电子迁移率解析模型

Li Xiaojian,Tan Yaohua,Tian Lilin,<br>李小健,耀华,立林
半导体学报 , 2008,
Abstract: 提出了一个应变硅沟道电子迁移率解析模型.模型以应变张量为对象研究应变硅沟道电子迁移率,因此与工艺相独立;适用于施加双轴应力及<100>/<110>方向单轴应力,沟道方向为<100>/<110>的器件;易于嵌入常用仿真工具中.
微生物研究在土壤质量评估中的应用
耀华,冯玉龙
应用与环境生物学报 , 2008,
Abstract: 摘要为了防止土壤退化,实现资源的持续利用,必须对土壤质量进行评估.传统的理化指标已难满足需要,寻找能够全面反映土壤质量动态变化和判别胁迫环境或人为干扰下土壤质量变化的灵敏指标,已成为土壤生态学的研究热点.土壤微生物是土壤生态系统的重要组分,在生物地球化学循环过程中有重要的作用,对土壤环境变化和胁迫的反应十分灵敏.但由于土壤微生物种类繁多且难以培养,限制了其在土壤质量评价中的应用.近年来围绕土壤微生物总量、活性和组成的测定发展出了很多新的技术,如微生物生物量测定、土壤酶活性测定、土壤诱导呼吸强度测定、biolog微量分析、纯培养、磷脂脂肪酸谱图分析和分子生物学技术等,极大地促进了微生物指标在土壤质量评价中的应用.本文就这3个方面的土壤微生物研究技术及其在土壤质量评价中的应用进行评述.表1参70
Effects of nitrogen fertilization and planting density on Ageratina adenophora growth and its competitive traits
氮肥和种植密度对紫茎泽兰生长和竞争的影响

TIAN Yao-hua,FENG Yu-long,LIU Chao,<br>耀华,冯玉龙,刘潮
生态学杂志 , 2009,
Abstract: 紫茎泽兰(Ageratina adenophora)是我国西南热带亚热带地区危害最严重的外来入侵植物之一。本研究在野外设置不同氮肥供给水平和种植密度下的紫茎泽兰、拔毒散(Sida szechuensis)、伏生臂形草(Brachiaria decumbens)和非洲狗尾草(Setaria anceps)的单种和紫茎泽兰与其他3种植物混种的人工群落,从植被-土壤相互作用的角度分析紫茎泽兰的入侵机制。结果表明:单种时4种受试植物均表现了对氮营养的响应,随氮肥水平的升高,根冠比降低,比叶面积升高;通过比较总生物量增幅,氮响应能力非洲狗尾草>伏生臂形草>紫茎泽兰>拔毒散。混种时受试植物与紫茎泽兰的生物量比和株高也表明非洲狗尾草的竞争能力>伏生臂形草>紫茎泽兰>拔毒散;与拔毒散混种的紫茎泽兰以及与 紫茎泽兰混种的伏生臂形草和非洲狗尾草的种内竞争随种植密度的增大而增大,导致种间竞争能力下降,在高种植密度下对混种物种的抑制作用减弱。紫茎泽兰在氮响应能力、竞争能力和表型可塑性方面均强于本地种,可能与其入侵机制有关;牧草的氮响应能力和竞争能力强于紫茎泽兰,其中非洲狗尾草又强于伏生臂形草,可能更适宜于入侵地的替代控制。
Interval Scaling Algorithm and its Concept Lattice Construction from Extended Formal Context
一种区间数分解与定标算法及其扩展形式背景的概念格生成方法

LIU Yao-hua,ZHOU Wen,LIU Zong-tian,<br>刘耀华,周文,刘宗
计算机科学 , 2009,
Abstract: The existing concept lattice model is unable to process data which contains not only fuzzy information but also scalar and Boolean information.The extended formal context includes many kinds of information such as scalar,fuzzy,Boolean,and interval.Therefore,how to build concept lattice from extended formal context,is a meaningful study.An interval scaling algorithm is proposed here to deal with the extended formal context and a corresponding concept lattice construction method is produced.In the end of this...
黄豆溜油的简易制法
次青,耀华
中国中药杂志 , 1959,
Abstract: <正>根据文献记载,黑豆溜油对湿疹有特殊的疗效,由于黑豆的供应比較困难,于是我們就联想到了黄豆;虽然在民間黄豆並不作药用,但其化学成份与黑豆基本相同,因此我們在临床上試用了黄豆溜油,並与黑豆溜油进行了比較,經过半年来临床效果观察,証实二者的作用是一致的。现将我們的制备方法介紹于下,供同志們参考。一、黄豆溜油干溜器构造(見图)
Advances in Studies onEndangered Aquilaria Plant
沉香属植物研究进展

Tian Yao-hu,Yuan Hui-fang,Ni Shu-bang,Li Guo-hua,<br>耀华,原慧芳,倪书邦,李国华
热带亚热带植物学报 , 2009,
Abstract: The biological and ecological characteristics and ex-situ conservation technique of Aquilaria sinensis were reviewed, as well as the formation mechanism, production, havesting, processing and classification of Agarwood. The development and utilization values of A. sinensis, such as aspects of medicine, landscaping, essence oil, were discussed. A sinensis is a local tree species it has high economical and ornamental value charac-terized by strong adaptability, simple propagation, easily cultivation, and less...
Influence of Growth Light Intensity on Photosynthetic Characteristics in Six Varieties of Hevea brasiliensis Seedlings
生长光强对六个橡胶树品种幼苗光合特性的影响

TIAN Yao-hua,YUAN Hui-fang,LONG Yun-feng,WEI Li-ping,<br>耀华,原慧芳,龙云峰,魏丽萍
热带亚热带植物学报 , 2012,
Abstract: Abstract: Six Hevea brasiliensis varieties seedlings adapted for 1 year were grown under different light intensity, such as 100%, 50%, 25% and 5% natural light, the response characteristics of leaf photosynthetic system to light intensity and CO2 concentration were studied. The results showed that six H. brasiliensis varieties showed strong adaptability to different light environments. Under different light intensities, the maximum photosynthetic rate (Pmax), light compensation point (LCP), dark respiration rate (Rd), triose phosphate utilization rate (TPU), maximum carboxylation rate (Vcmax ) and maximum electron transport rate (Jmax) and chlorophyll content (Chl) showed significant differences (P<0.05), and did not light saturation point (LSP) and AQY (apparent quantum efficiency). Under the same light intensity, leaf maximum photosynthetic rate (Pmax), dark respiration rate (Rd), triose phosphate utilization rate (TPU), the largest electron transfer rate (Jmax) and chlorophyll content (Chl) among six varieties had significant difference (P<0.05), and did not light compensation point (LCP), maximum carboxylation rate (Vcmax) and apparent quantum efficiency (AQY). Comprehensive comparison of parameters in six H. brasiliensis varieties, RRIM600, Yunyan77-4 and PR107 are fit for planting environment with relative light intensity of 100%-50%, while Yunyan77-2, GT1 and Reyan523 are suitable for that of 50%-25%.
电子器件制造过程中的一种均匀化加热法的数值研究
耀华,刘志刚,隆治
工程热物理学报 , 2003,
Abstract: 本文提出了喷嘴沿被加热物体宽度方向往复移动式射流冲击加热方法,该加热方法可提高被加热物体的等温性。通过进行数值模拟,得到了在任意时刻,被加热物体的温度分布及全体计算时间内被加热物体表面平均温度分布,进而得到了喷嘴移动周期与被加热物体的等温性的关系。
中西医结合治疗膝关节骨性关节炎184例疗效观察
毛英俊,香兰,耀华
宁夏医科大学学报 , 2008,
Abstract: 为中西医结合治疗膝关节骨性关节炎184例疗效观察,分析我院2003年8月―2006年12月应用中西医结合治疗的膝关节骨性关节炎184例(312膝)患者的临床资料,采用膝关节闭合冲洗,膝内外侧痛点药物注射,膝关节腔内药物注射,自拟中药汤剂治疗。结果临床治愈86膝,占27.56%;显效178膝,占57.05%;有效46膝,占14.74%;无效2例,占0.64%。本组使用中西医结合治疗骨性关节炎,疗效显著,方法简便。适合于基层医院推广使用。更多还原
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