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Symbolic Macromodeling for Statistical Simulation of Operational Amplifiers

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Journal of Electronic Science and Technology 2013年第3期11卷 272-276页

作者： Lan-Lan Dong Guo-yong Shi jian-Dong Cheng the EDA Research Lab School of Microelectronics Shanghai Jiao Tong University

Symbolic circuit simulator is traditionally applied to the small-signal analysis of analog circuits. This paper establishes a symbolic behavioral macromodeling method applicable to both small-signal and large-signal analysis of general two-stage operational amplifiers （op-amps）. The proposed method creates a two-pole parametric macromodel whose parameters are analytical functions of the circuit element parameters generated by a symbolic circuit simulator. A moment matching technique is used in deriving the analytical model parameter. The created parametric behavioral model can be used for op-amps performance simulation in both frequency and time domains. In particular, the parametric models are highly suited for fast statistical simulation of op-amps in the time-domain. Experiment results show that the statistical distributions of the op-amp slew and settling time characterized by the proposed model agree well with the transistor-level results in addition to achieving significant speedup.

关键词： Index Terms---Analog behavioral model large-signalanalysis moment matching operational amplifiers,process variation statistical analysis symbolic analysis.

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城市青年隐婚现象

当代青年研究 2006年第1期 39-43页

作者：韩勇南京大学社会学系

如今在城市青年中,有越来越多的人选择隐瞒自己的已婚事实,而以单身面目出现在各种场合,这种现象引发人们的思考。本文从多方面分析了隐婚现象的特点,其之所以出现的动机和条件,并从隐私权、生活方式选择、婚姻质量问题和劳动用工制度... 详细信息

如今在城市青年中,有越来越多的人选择隐瞒自己的已婚事实,而以单身面目出现在各种场合,这种现象引发人们的思考。本文从多方面分析了隐婚现象的特点,其之所以出现的动机和条件,并从隐私权、生活方式选择、婚姻质量问题和劳动用工制度的改良四个角度对之进行了分析。

关键词：城市青年隐婚单身

Sustainability education based on NetLogo modeling environment： Taking climate change simulation as an example

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通讯和计算机（中英文版） 2008年第9期5卷 69-73页

作者： han jian-xin PAN Xu-li XUE Hui-feng College of Automation Northwestern Polytechnical University Xi＇an 710072 China College of Tourism and Environment Shaan ＇xi Normal University Xi＇an 710062 China

装设粘弹性阻尼器钢筋混凝土结构抗震实用分析

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世界地震工程 2005年第1期21卷 117-122页

作者：韩建平李慧杜永峰兰州理工大学防震减灾研究所甘肃兰州730050

为了设计装设粘弹性阻尼器受控结构、推进此项技术的工程应用,分别利用粘弹性阻尼器的复刚度模型和有限元模型,编制了振型分解反应谱程序和弹性时程分析程序,并对一装设粘弹性阻尼器的 16层钢筋混凝土结构和相应原结构在多遇地震下的响... 详细信息

为了设计装设粘弹性阻尼器受控结构、推进此项技术的工程应用,分别利用粘弹性阻尼器的复刚度模型和有限元模型,编制了振型分解反应谱程序和弹性时程分析程序,并对一装设粘弹性阻尼器的 16层钢筋混凝土结构和相应原结构在多遇地震下的响应进行了分析。

关键词：粘弹性阻尼器抗震钢筋混凝土结构振型分解时程分析刚度模型反应谱有限元模型工程应用响应

利用流化床实验台研究生活垃圾焚烧重金属分布规律

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中国电机工程学报 2005年第17期25卷 100-104页

作者：李建新严建华池涌浙江大学能源清洁利用与环境工程重点实验室浙江省宁波市315100 浙江省杭州市310027 浙江大学宁波理工学院浙江大学能源清洁利用与环境工程重点实验室

对城市生活垃圾中典型的组分进行了重金属含量分析,并模拟城市生活垃圾的主要构成,在小型流化床试验台上研究了焚烧温度、垃圾含氯量、水分变化在焚烧过程中对重金属迁移特性的影响,结果表明,焚烧温度提高使重金属的蒸发量增加;且垃圾... 详细信息

对城市生活垃圾中典型的组分进行了重金属含量分析,并模拟城市生活垃圾的主要构成,在小型流化床试验台上研究了焚烧温度、垃圾含氯量、水分变化在焚烧过程中对重金属迁移特性的影响,结果表明,焚烧温度提高使重金属的蒸发量增加;且垃圾组分中氯含量增加同样也会使重金属蒸发量增加,尤其是对于沸点较低的重金属,如Hg、Cd、Pb、Zn等;而垃圾中水分的变化对重金属蒸发特性影响较小。

关键词：热能动力工程重金属垃圾焚烧迁移

INTRA-ION PAIR ELECTRON TRANSFER OF PHOTOEXCITED METHYLENE BLUE BORATE

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Chinese Chemical Letters 1995年第7期6卷 597-600页

作者： Xiu Zhi WANG han Qing CHEN Er jian WANG (Institute of Photographic Chemistry, Academia Sinica, Beijing 100101National Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou,730000) Acad Sinica Inst Photog Chem Beijing 100101 Peoples R China Lanzhou Univ Natl Lab Appl Organ Chem Lanzhou 730000 Peoples R China

The photochemical reaction of methylene blue (n-butyltriphenyl) borate, MBRBPh3 was examined. The ultrafast quenching rate and large negative value of Delta G indicated that the intra-ion pair ET plays an important role in photoreaction of MBRBPh3. The sequent boron- carbon bond cleavage of butyltriphenylboranyl radical intermediate was found by GC-MS and photo-CIDNP studies.

关键词： ION INTRA-ION PAIR ELECTRON TRANSFER OF PHOTOEXCITED METHYLENE BLUE BORATE

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一类新的时滞混沌系统及其最小能量引导控制

控制理论与应用 2010年第10期27卷 1383-1387页

作者：涂建军何汉林海军工程大学理学院湖北武汉430033

提出了一类时滞混沌系统.从最大Lyapunov指数、相图和分叉图3个方面,揭示这类系统随其参数变化所产生的丰富动力学行为,并发现了大幅度拟周期(弱混沌)振荡现象,分析了这种振荡在工业中的危害以及可能的用途.提出了异时滞的高维混沌系统... 详细信息

提出了一类时滞混沌系统.从最大Lyapunov指数、相图和分叉图3个方面,揭示这类系统随其参数变化所产生的丰富动力学行为,并发现了大幅度拟周期(弱混沌)振荡现象,分析了这种振荡在工业中的危害以及可能的用途.提出了异时滞的高维混沌系统间的同步控制问题,并提出一种基于变增益反馈的最小能量控制法,用线性反馈控制器实现了快速的引导控制.因为反馈增益由一个小量随着同步误差的减小逐渐增大,本文提出的控制器可以有效减小控制所需的能耗.

关键词：混沌系统时滞系统异时滞同步

Susceptibility and tissue specificity of Spodoptera frugiperda to Junonia coenia densovirus

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Journal of Integrative Agriculture 2021年第3期20卷 840-849页

作者： CHEN Zu-wen YANG Yan-chao ZhanG jian-feng JIN Ming-hui XIAO Yu-tao XIA Zhi-chao LIU Yuan-yuan YU Sai-zhen YANG yong-bo WANG Yuan LI Yi LIU Kai-yu School of Life Sciences Central China Normal UniversityWuhan 430079P.R.China Agricultural Genomics Institute Chinese Academy of Agricultural SciencesShenzhen 518120P.R.China Medical College Hubei University of Arts and ScienceXiangyang 441053P.R.China Hubei Engineering Research Center of Viral Vector Wuhan University of BioengineeringWuhan 430415P.R.China

The fall armyworm,Spodoptera frugiperda,which destroys many economic crops such as rice and maize,has recently invaded *** viruses as biological control agents play important roles in killing *** potential viral insecticide is the environmentally highly infective and virulent *** successfully rescued Junonia coenia densovirus(JcDV)using its infectious clone in different insect cell lines and larvae of three insect *** showed that the lysate of cultured insect cells transfected by the JcDV infectious clone killed the 2 nd instar *** LD50 of homogenate from JcDV-infected Spodoptera litura to the 2 nd instar ***(1.76×10^(8)viral genome copies per larva during 10 d post infection)was higher than that of the 2 nd instar ***(7.39×10^(7)Jc DV genome copies)or Helicoverpa armigera larvae(9.71×10^(7)JcDV genome copies).The LT50 of the *** homogenate(2.60×10^(9)viral genome copies each larva)to the 2 nd instar *** was 6.96 d,longer than that of the ***(6.18 d)or the 2 nd instar ***(5.94 d).JcDV could infect the fat body of ***,but not *** or *** JcDV can infect all three lepidopteran species,their susceptibility to the virus *** has great potential as a biological control agent against pests such as ***.

关键词： Spodoptera frugiperda Junonia coenia densovirus rescue of virus susceptibility biological control

Factors associated with significant liver fibrosis assessed using transient elastography in general population

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World Journal of Gastroenterology 2015年第4期21卷 1158-1166页

作者： Seng Chan You Kwang Joon Kim Seung Up Kim Beom Kyung Kim Jun yong Park Do Young Kim Sang Hoon Ahn Won Jae Lee Kwang-Hyub han Department of Internal Medicine Yonsei University College of MedicineSeoul 120-752South Korea Division of Endocrinology and Metabolism Yonsei University College of MedicineSeoul 120-752South Korea Institute of Gastroenterology Yonsei University College of MedicineSeoul 120-752South Korea Liver Cirrhosis Clinical Research Center Seoul 120-752South Korea Seoul Gookgwain School Seoul 110-521South Korea

AIM: To investigate the prevalence of significant liver fibrosis assessed using transient elastography(TE) and its predictors in asymptomatic general ***: A total of 159 subjects without chronic viral hepatitis who underwent comprehensive medical health check-up between January 2012 and July 2012 were prospectively recruited. Significant liver fibrosis was defined as liver stiffness value > 7.0 k ***: The mean age and body mass index(BMI) of the study population(men 54.7%) was 56.0 years and 24.3 kg/m2. Among the study subjects, 11(6.9%) showed significant liver fibrosis. On univariate analysis, BMI, alanine aminotransferase(ALT), homeostasis model assessment of insulin resistance, carotid intimal media thickness(IMT), number of calcified plaques on carotid ultrasound, and visceral fat area on computed tomography were significantly higher in subjects with significant liver fibrosis than in those without(all P < 0.05). However, on multivariate analysis, BMI [odds ratio(OR) =1.487; P = 0.045], ALT(OR = 1.078; P = 0.014), carotid IMT(OR = 3.244; P = 0.027), and the number of calcified carotid plaques(OR = 1.787; P = 0.031) were independent predictors of significant liver fibrosis. CONCLUSION: The prevalence of significant liver fibrosis assessed using TE was 6.9% in apparently healthy subjects. High BMI, high ALT, thicker carotid IMT, and higher numbers of calcified carotid plaqueswere independently associated with the presence of significant liver fibrosis.

关键词： Transient elastography Healthy subjects Fibroscan