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Digital Pulse Width Modulation Control in Power Electronic Circuits Design

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Journal of Power and Energy Engineering 2020年第4期8卷 1-10页

作者： hsu Myat Tin Swe Hla Myo tun Maung Maung Latt Department of Electronic Engineering Yangon Technological University Yangon Myanmar Department of Electronic Engineering Technological University (Taungoo) Taungoo Myanmar

The paper mainly focuses on the digital pulse width modulation (DPWM) control techniques for high performance power electronic circuit design. The problem to be solved in this study addresses the DPWM converter design for DC to DC conversion process. The control techniques have been utilized the Fuzzy Logic Rules Base method for proposed SIMULINK model of high performance power electronic circuit. The analytical calculations for real circuit design have been completed based on the mathematical modeling of the system. The results from the developed SIMULINK model confirm the target specifications of the high performance condition for power electronic circuit which was met the objective of this study. The numerical results have been carried out with the help of MATLAB/SIMULINK.

关键词： Digital Pulse Width Modulation Power Electronics Analytical Modeling Mathematical Modeling SIMULINK Model MATLAB

Association between change in HDL-C and vascular events in patients treated with statins: Report from the UK general practice research database

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World Journal of Cardiovascular Diseases 2012年第2期2卷 64-73页

作者： Lori D. Bash tun-Ying hsu Vasilisa Sazonov Baishali Ambegaonkar Department of Epidemiology University of Medicine and Dentistry of New Jersey Piscataway USA Global Health Outcomes Merck & Co. Inc. Whitehouse Station USA

Dyslipidemia, including low levels of high-density lipoprotein cholesterol (HDL-C), is a relatively well-established risk factor for cardiovascular disease. However, the independent association between changes in HDL-C and the subsequent risk of cardiovascular events has not been well studied. The retrospective cohort analysis was conducted to evaluate the association between changes in HDL-C and cardiovascular (CV) and/or cerebrovascular (CB) events among statin-treated patients. Patient demo-graphics, clinical characteristics, laboratory data, and CV/CB events, were collected from the UK General Practice Research Database. The association between the risk of an incident event and changes in patients’ HDL-C was estimated using multivariate Cox pro-portional hazards models. Among 17,923 statin-treated patients with an average follow-up of 1.9 years, there were 815 CV events and 220 CB events. The average change in HDL-C experienced was 0.4 mg/dL, ranging from 11 mg/dL average decrease in the lowest change quartile to 12 mg/dL average increase in the highest change quartile. CV events occurred at an average overall rate of 21 per 1000 person-years and 17 per 1000 person-years among individuals in the highest quartile of change in HDL-C levels. Fully adjusted Cox regression estimated a 6% decrease in hazards (HR, 0.94;95% CI, 0.90, 0.98) of a subsequent CV event associated with each 5 mg/dL increase in HDL-C. Similar results (HR: 0.95, 95% CI, 0.92, 0.98) were observed when assessing the association with changes in HDL-C and the composite outcome of CV/CB event. Among statin-treated patients from UK clinical practices, increases in HDL-C were associated with a significantly decreased relative risk of experiencing CV/CB events with a more pronounced effect on CV events. Therefore, a more aggressive treatment to increase HDL-C could benefit patients by reducing the risk of CV/CB events.

关键词： LDL-C HDL-C CV and CB Event and LMT

经皮穿刺内窥镜下手术治疗腰椎间盘疾患的疗效分析

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中国脊柱脊髓杂志 2009年第5期19卷 330-335页

作者：徐少克童瑞年童瑞龙台湾童综合医院骨科

目的:分析经皮穿刺内窥镜下手术治疗腰椎间盘疾患的效果,总结临床经验。方法:从1998年6月至2007年6月,在我院接受经皮穿刺内窥镜下手术治疗并得到1年以上随访的腰椎间盘疾病患者988例,患者手术时年龄18～84岁,平均48岁。包含性腰椎间盘... 详细信息

目的:分析经皮穿刺内窥镜下手术治疗腰椎间盘疾患的效果,总结临床经验。方法:从1998年6月至2007年6月,在我院接受经皮穿刺内窥镜下手术治疗并得到1年以上随访的腰椎间盘疾病患者988例,患者手术时年龄18～84岁,平均48岁。包含性腰椎间盘突出症298例,非包含性腰椎间盘突出症552例,椎间孔外及椎孔间腰椎间盘突出症40例,复发性腰椎间盘突出症42例,椎间隙感染18例,高龄腰椎退变性疾病合并坐骨神经痛38例。病变节段分布:L1/25例,L2/335例,L3/448例,L4/5582例,L5/S1218例,43例为多节段。采用MacNab评分对手术疗效进行评估,并对间接性减压术和目标定位椎间盘摘除术治疗包含性(A组)和非包含性(B组)椎间盘突出患者的结果进行统计学分析。结果:术中及术后共发生并发症47例,发生率4.8%,包括局部麻木感29例,硬脊膜微小撕裂1例,手术操作器械折断3例,部分运动神经受损5例,细菌性椎间隙感染5例,非细菌性椎间盘炎4例,所有并发症均得到良好的处理。随访12～84个月,平均58个月。A组患者中间接性减压者MacNab评分满意度为87%,目标定位椎盘摘除术者为93%,两者比较无统计学差异(χ2=3.460,P=0.084);B组患者中间接性减压者MacNab评分满意度为53%,目标定位椎盘摘除术者为94%,两者比较有统计学差异(χ2=115.757,P<0.001);A、B组比较间接性减压术满意度有统计学差异(χ2=37.357,P<0.001),目标定位椎盘摘除术满意度无统计学差异(χ2=0.072,P=0.821);椎间孔外及椎孔间型突出者MacNab评分满意度为80%(32/40),复发性腰椎间盘突出症满意度74%(31/42),椎间隙感染满意度72%(13/18),高龄腰椎退变性疾病合并坐骨神经痛满意度71%(27/38)。结论:严格选择手术适应证下,应用内窥镜下手术治疗腰椎间盘疾患具有创伤小、术后恢复快,后遗症及并发症少等优点。间接性减压术治疗包含性腰椎间盘突出症的疗效优于非包含性腰椎间盘突出症;目标定位椎盘摘除术治疗包含性及非包含性腰椎间盘突出症均可取得较优良的临床疗效率,且明显优于间接性减压术。内窥镜下手术治疗椎间孔外及椎孔间型腰椎间盘突出症、复发性腰椎间盘突出症、椎间隙感染和高龄腰椎退化性疾病合并坐骨神经痛也能取得良好的临床效果。

关键词：腰椎间盘疾患微创椎间盘切除术内窥镜

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Random phase multiplexing for volume holographic storage

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Random phase multiplexing for volume holographic storage

Computerized FDTD Method for Longitudinal Optical Phonon Energy on Semiconductor Hybrid Structure for High Power Devices Fabrication

Photonics Asia 2004:Information Processing and Data Storage

作者： Ching-Cherng Sun tun-Chien Teng Chih-Yuan hsu Wei-Chia Su Institute of Optical Sciences National Central UniversityChung-Li320Taiwan Institute of Optical Sciences National Central UniversityChung-Li320Taiwan Institute of Optical Sciences National Central UniversityChung-Li320Taiwan Department of Physics National Changhua University of EducationChanghua500Taiwan

Two volume holographic storage schemes using random phase multiplexing technique are presented. A ground glass is spatially shifted to multiplex the signals for both storage schemes. The diffraction s

关键词： volume holographic storage Random phase multiplexing photorefractive effect.

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Journal of Computer Science Research 2021年第2期3卷 39-51页

作者： Phyo Sandar Win hsu Myat Tin Swe Hla Myo tun Department of Electronic Engineering Technological University(Taungoo)BagoMyanmar Faculty of Electrical and Computer Engineering Yangon Technological UniversityYangonMyanmar

The research problem in this study is the longitudinal optical phonon energy on metal/semiconductor interface for high performance semiconductor *** research solution is to make the software model with finite difference time domain(FDTD)solution for transmission and reflection pulse between metal and semiconductor interface for carrier dynamics *** objective of this study is to find the quantum mechanics understanding on interface engineering for fabricating the high performance device for future semiconductor technology *** analysis was carried out with the help of *** quantum mechanical spatial field on metal-semiconductor stripe structure has been analyzed by FDTD *** emission reveals a characteristic polar radiation distribution of electric dipoles and a wavelength independent of the structure size or the direction of emission;consequently,it is attributed to thermally generate electric dipoles resonating with the longitudinal optical phonon *** energy occurs lattice vibration of material by the polarization of light,if the material has rigid structure reflect back the incident ***,high reflective metal-semiconductor structure always use as photodectors devices in optical fiber *** lattice vibration material structure has no phonon effect,so this structure based devices can get high performance any other structure based *** transmission and reflection coefficient of metal-semiconductor GaN/Au layer structure compare with GaN/Ti and GaN/Pt ***(P)and transverse(S)polarization of light incident on a metal-semiconductor nanolayer structure with IR *** use of the layer by layer(LbL)method to fabricate nanofilms requires meeting certain conditions and limitations that were revealed in the course of research on model systems.

关键词： FDTD Semiconductor structure Computer simulation Computer programming MATLAB

三化螟与荔枝蝽体液氨基酸和脂肪体转氨酶与谷氨酸脱氢酶的研究

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昆虫学报 1979年第2期22卷 119-126页

作者：胡钧张汉云邹柏祥许廷森中国科学院上海昆虫研究所中国科学院上海昆虫研究所中国科学院生物化学研究所中国科学院昆明动物研究所

1.用纸层析的方法测定了水稻、三化螟与荔枝蝽体液的氨基酸含量。 2.在三化螟幼虫脂肪体中,观察到谷天转氨酶、谷丙转氨酶与鸟氨酸转氨酶的活力。在荔枝蝽的脂肪体中有11种氨基酸（L-天门冬氨酸、L-丙氨酸、L-异白氨酸、L-白氨酸、L-缬... 详细信息

1.用纸层析的方法测定了水稻、三化螟与荔枝蝽体液的氨基酸含量。 2.在三化螟幼虫脂肪体中,观察到谷天转氨酶、谷丙转氨酶与鸟氨酸转氨酶的活力。在荔枝蝽的脂肪体中有11种氨基酸（L-天门冬氨酸、L-丙氨酸、L-异白氨酸、L-白氨酸、L-缬氨酸、L-苯丙氨酸、L-鸟氨酸、L-酪氨酸、L-色氨酸、L-β-丙氨酸与DL-γ-氨基丁酸）可与α-酮戊二酸进行转氨作用,以形成谷氨酸。 3.在三化螟与荔枝蝽脂肪体中均存在谷氨酸脱氢酶。

关键词：三化螟脂肪体水稻害虫氨基酸氨基羧酸荔枝蝽转氨作用转氨基作用谷氨酸脱氢酶转氨酶氨基转移酶体液

土霉菌Streptomyces rimosus A-166的菌落颜色的变异和遣传

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复旦大学学报(自然科学) 1964年第2期 199-206页

作者：许菊彦盛祖嘉复旦大学遗传学研究所复旦大学遗传学研究所北京医学科学院抗菌素研究所

黑色的土霉菌A-166用单孢子进行传代时每一代中出现O.4～10.8%的白色菌落.用白色菌落传代时很少出现黑色菌落.使黑色的甲硫氨酸缺陷型和白色的烟碱酸缺陷型形成异核体,然后从异核体中分离甲硫氨酸和烟碱酸缺陷型菌株,发现前者仍然是黑色... 详细信息

黑色的土霉菌A-166用单孢子进行传代时每一代中出现O.4～10.8%的白色菌落.用白色菌落传代时很少出现黑色菌落.使黑色的甲硫氨酸缺陷型和白色的烟碱酸缺陷型形成异核体,然后从异核体中分离甲硫氨酸和烟碱酸缺陷型菌株,发现前者仍然是黑色的,后者仍然是白色的.以上两方面的实验结果都说明土霉菌的黑色色素的产生为核基因所控制.从异核体得到的原养型重组合子的因子型多数是白色的.由黑白菌落的比数推测本文所涉及的四个基因的排列次序是nic-w-met1-met2;两个甲硫氨酸基因是紧密连锁的.异核体菌落和原养型重组合子菌落的颜色都属于中间型,接种传代两次以后往往变为白色.这些特殊的核质关系尚有待于进一步阐明.

关键词：异核体缺陷型子菌落甲硫氨酸 Streptomyces rimosus A-166 菌落数烟碱酸分生抱子原养型

Consecutive Exotropia Experiences in CGMH

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Consecutive Exotropia Experiences in CGMH

第三届全球华人眼科学术大会暨中华医学会第十一届全国眼科...

作者： Han-Chih Cheng Hong-Na hsu Chang Gung Memorial Hospital Taipei Taiwan No. 199 Tun-hua north Rd. Taipei Taiwan 105 Chang Gung Memorial Hospital Taipei Taiwan No. 199 Tun-hua north Rd. Taipei Taiwan 105

＜正＞Purpose: Consecutive exotropia may happen many years after the primary operation for esotropia. We want to know if am-blyopia, cycloplegic refraction status, surgical methods play any roles with the incidence of consecutive exotropia. Methods: We retrospectively reviewed charts of 45 patients who had operations for consecutive exotropia in our hospital. Age

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核子与氘核散射中的极化

物理学报 1960年第6期 324-330页

作者：时学丹罗辽复徐行黄念宁内蒙古大学物理系

利用转动、反射及时间反演的不变性,求得核子与氘核散射中极化的一般公式,并且把所得的结果通过散射相移表示出来。

关键词：自旋反演粒子性质数学笛卡尔张量重子核子不变性标量函数