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MODEL ANALYSIS AND PARAMETER EXTRACTION FOR MOS CAPACITOR INCLUDING QUANTUM MECHANICAL EFFECTS

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Journal of Computational Mathematics 2006年第3期24卷 401-411页

作者： Hai-yan Jiang ping-wen Zhang LMAM CCSE and School of Mathematical Sciences.Peking University Beijing 100871 China

The high frequency CV curves of MOS capacitor have been studied. It is shown that semiclassical model is a good approximation to quantum model and approaches to classical model when the oxide layer is thick. This conclusion provides us an efficient （semiclassical） model including quantum mechanical effects to do parameter extraction for ultrathin oxide device. Here the effective extracting strategy is designed and numerical experiments demonstrate the validity of the strategy.

关键词： Poisson Equation SchrSdinger Equation MOS Capacitor Quantum Effect,Sensitivity Parameter Extraction.

STABILITY OF THEORETICAL SOLUTION AND NUMERICAL SOLUTION OF NONLINEAR DIFFERENTIAL EQUATIONS WITH PIECEWISE DELAYS

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Journal of Computational Mathematics 2005年第4期23卷 393-400页

作者： Li-ping wen Shou-fu Li School of Mathematics and Computational Science Xiangtan University Xiangtan 411105 China

This paper is concerned with the stability of theoretical solution and numerical solution of a class of nonlinear differential equations with piecewise delays. At first, a sufficient condition for the stability of theoretical solution of these problems is given, then numerical stability and asymptotical stability are discussed for a class of multistep methods when applied to these problems.

关键词： Stability Delay differential equations Linear multistep methods

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基于细观模拟的土石混合体固结特性研究

工程力学 2024年第10期41卷 118-127页

作者：龚文平赵晓宇李馨馨赵超中国地质大学(武汉)工程学院湖北武汉430074

土石混合体具有特殊的结构特性,当前数值模拟研究主要聚焦于强度和变形特征,较少从细观尺度探究其固结特性。该文引入无厚度单元法模拟土-石接触面并验证了其有效性,在此基础上构建了土石混合体结构随机分布模型,从细观尺度上探究了内... 详细信息

土石混合体具有特殊的结构特性,当前数值模拟研究主要聚焦于强度和变形特征,较少从细观尺度探究其固结特性。该文引入无厚度单元法模拟土-石接触面并验证了其有效性,在此基础上构建了土石混合体结构随机分布模型,从细观尺度上探究了内部结构特征(土-石接触面参数、块石形状、含量及级配)对土石混合体固结特性的影响规律。结果表明:当块石含量不变时,含圆形块石的土石混合体固结沉降最小,其次为椭圆形,含多边形块石的土石混合体固结沉降最大;随着含石量的增加,土石混合体沉降和孔隙比均减小;当含石量一定时,含大尺寸块石较多的土石混合体发生的固结程度较高。

关键词：土石混合体固结特性土-石接触面细观结构模拟有限单元法

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响应面法优化蛹虫草下饭菜工艺及挥发性物质分析

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中国调味品 2024年第3期49卷 46-55页

作者：张纪新周天浩张兰温平平许慧卿王君扬州大学旅游烹饪学院江苏扬州225127 江苏康能生物工程股份有限公司江苏扬州211400

以杏鲍菇和蛹虫草为主要原料,研发一种蛹虫草下饭菜,以感官评分为指标,利用单因素试验、正交试验和响应面试验获得制作蛹虫草下饭菜的最佳工艺条件,最终确定配方为杏鲍菇添加量35%、蛹虫草添加量10%、香菜碎添加量7.5%、辣椒粉添加量1%... 详细信息

以杏鲍菇和蛹虫草为主要原料,研发一种蛹虫草下饭菜,以感官评分为指标,利用单因素试验、正交试验和响应面试验获得制作蛹虫草下饭菜的最佳工艺条件,最终确定配方为杏鲍菇添加量35%、蛹虫草添加量10%、香菜碎添加量7.5%、辣椒粉添加量1%。此外,对最佳配方产品进行理化分析和挥发性风味物质鉴定,得出最佳工艺条件下蛹虫草下饭菜的水分含量为25.83%,脂肪含量为39.69%,蛋白质含量为4.92%,水分活度为0.8817。共检测出43种挥发性风味物质,包括醇类、醛类、酸类、酮类、醚类、烯烃类以及其他类风味化合物。该研究为蛹虫草相关产品的开发与研制提供了一定的理论基础。

关键词：蛹虫草感官评价响应面法挥发性物质

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NF-κB/NLRP3信号通路在急性睡眠剥夺致小鼠焦虑抑郁样行为中的调控作用

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现代预防医学 2024年第10期51卷 1852-1859+1871页

作者：潘芸王洁张文平张英英山西医科大学公共卫生学院流行病学教研室煤炭环境致病与防治教育部重点实验室

目的探讨NF-κB/NLRP3信号通路在急性睡眠剥夺致小鼠焦虑抑郁样行为中的调控作用。方法选取48只8周龄雄性C57BL/6J小鼠，随机分为4组：对照组(CON)、抑制剂组(lithium chlo-ride, LiCl)、睡眠剥夺组(sleep deprivation, SD)和睡眠剥夺... 详细信息

目的探讨NF-κB/NLRP3信号通路在急性睡眠剥夺致小鼠焦虑抑郁样行为中的调控作用。方法选取48只8周龄雄性C57BL/6J小鼠，随机分为4组：对照组(CON)、抑制剂组(lithium chlo-ride, LiCl)、睡眠剥夺组(sleep deprivation, SD)和睡眠剥夺+抑制剂组(SD+LiCl),每组12只。采用多平台水环境改良法(modified multiple platform method, MMPM)构建小鼠急性睡眠剥夺模型，利用高架十字迷宫实验、旷场实验、悬尾实验和强迫游泳实验评估小鼠焦虑抑郁样行为学改变，HE染色观察小鼠海马组织病理学改变，RT-PCR法检测小鼠核因子κB(Nuclear factor kappa B,NF-κB)、核苷酸结合寡聚化结构域样受体热蛋白结构域相关蛋白3(NOD-like receptor thermal protein domain associated protein3,NLRP3)的mRNA表达。结果与CON组相比，SD组小鼠体重、海马重量、海马脏器系数均显著降低(F=0.452,P=0.006;F=6.553,P=0.009;F=1.428,P=0.001)。在旷场实验中，与CON组相比，LiCl组进入中心区域次数无统计学差异(F=5.084,P=0.744),SD组显著减少(F=0.028,P=0.017)。在高架十字迷宫实验中，与CON组相比，LiCl组进入开放臂时间无统计学意义(F=0.09,P=0.113),SD组显著减少(F=0.085,P=0.011)。强迫游泳实验结果显示，与CON组相比，LiCl组小鼠不动时间无统计学差异(F=3.422,P=0.260)。悬尾实验表明，与CON组相比，SD组悬尾不动时间显著增加(F=11.218,P=0.005)。HE染色结果显示，与CON组相比，SD组以及SD+LiCl组小鼠海马组织均出现显著病理学改变。RT-PCR结果表明，与CON组相比，LiCl组NF-κB和NLRP3的mRNA表达无统计学差异(F=4.629,P=0.147;F=15.555,P=0.107),而SD组均显著增高(F=6.969,P<0.001;F=15.833,P=0.017)。结论 NF-κB/NLRP3通路可能在SD致小鼠焦虑抑郁样行为的发生过程中发挥调控作用。

关键词：急性睡眠剥夺焦虑样行为抑郁样行为 NF-κB/NLRP3通路氯化锂

Comparison between the Response of the Northwest Pacific Ocean and the South China Sea to Typhoon Megi(2010)

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Advances in Atmospheric Sciences 2017年第1期34卷 79-87页

作者： Zi-Liang LI ping wen Physical Oceanography Laboratory College of Oceanic and Atmospheric SciencesOcean University of ChinaQingdao 266100China Hunan Provincial Meteorological Station Changsha 430100China

The upper-ocean responses to Typhoon Megi （2010） are investigated using data from ARGO floats and the satellite TMI. The experiments are conducted using a three-dimensional Princeton Ocean Model （POM） to assess the storm, which affected the Northwest Pacific Ocean （NWP） and the South China Sea （SCS）. Results show that the upwelling and entrainment experiment together account for 93% of the SST anomalies, where typhoon-induced upwelling may cause strong ocean cooling. In addition, the anomalous SST cooling is stronger in the SCS than in the NWP. The most striking feature of the ocean response is the presence of a two-layer inertial wave in the SCS--a feature that is absent in the NWE The near-inertial oscillations can be generated as typhoon wakes, which have maximum flow velocity in the surface mixed layer and may last for a few days, after the typhoon＇s passage. Along the typhoon tracks, the horizontal currents in the upper ocean show a series of alternating negative and positive anomalies emanating from the typhoon.

关键词： typhoon South China Sea Northwest Pacific upwelling entrainment near-inertial oscillation

Transient accelerating scalar models with exponential potentials

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Research in Astronomy and Astrophysics 2013年第6期13卷 629-634页

作者： wen-ping Cui Yang Zhang Zheng-wen Fu Key Laboratory for Research in Galaxies and Cosmology The University of Science and Technology of China Chinese Academy of Sciences

We study a known class of scalar dark energy models in which the potential has an exponential term and the current accelerating era is transient. We find that, although a decelerating era will return in the future, when extrapolating the model back to earlier stages （z ≥ 4）, scalar dark energy becomes dominant over matter. So these models do not have the desired tracking behavior, and the predicted transient period of acceleration cannot be adopted into the standard scenario of the Big Bang cosmology. When couplings between the scalar field and matter are introduced, the models still have the same problem; only the time when deceleration returns will be varied. To achieve re-deceleration, one has to turn to alternative models that are consistent with the standard Big Bang scenario.

关键词： cosmology cosmological parameters -- cosmology theory

基于引导滤波分层的宽动态范围红外图像细节增强算法

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激光与红外 2024年第5期54卷 804-813页

作者：文洪青钱蓉蓉贾赞任文平谭开豪云南大学信息学院云南昆明650500 昆明物理研究所云南昆明650000

针对宽动态范围红外图像在视觉效果方面出现的对比度低、细节信息不凸显及整体清晰度较差问题,本文提出了一种基于引导滤波分层的宽动态范围红外图像细节增强算法。该算法采用方差决策加权引导滤波对原图作分层,得到了更接近原图的基础... 详细信息

针对宽动态范围红外图像在视觉效果方面出现的对比度低、细节信息不凸显及整体清晰度较差问题,本文提出了一种基于引导滤波分层的宽动态范围红外图像细节增强算法。该算法采用方差决策加权引导滤波对原图作分层,得到了更接近原图的基础层和更精细的细节层。为提高基础层的对比度,首先改进CLAHE的全局剪切点提升增强效果,然后基于AC视觉显著模型指导全局和改进局部直方图的融合,合理兼顾了图像背景和目标;为有效加强细节信息,基于多尺度加权引导滤波得到了信息更全面的新细节层,接着采用梯度域导向滤波对其消噪,再由Sigmoid函数压缩强边缘并突显细微目标,最后将两层信息融合并输出。实验结果表明,该算法在主观视觉和定量指标上均强于对比算法,且自适应强,鲁棒性好。

关键词：红外图像滤波分层 AC显著模型梯度域导向滤波 Sigmoid压缩

Orientation-Dependent Morphology and Evolution of Interfacial Dislocation Networks in Ni-Based Single-Crystal Superalloys:A Molecular Dynamics Simulation

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Acta Mechanica Solida Sinica 2021年第1期34卷 79-90页

作者： Bin Chen wen-ping Wu Ming-Xiang Chen Department of Engineering Mechanics School of Civil EngineeringWuhan UniversityWuhan430072China State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan UniversityWuhan430072China

In this paper,the morphology and evolution of interfacial dislocation networks of(100),(110)and(111)interphases of Ni-based single-crystal superalloys are studied by molecular dynamics(MD)***-dimensional cubic-type and sandwich-type models are chosen to explore the orientation-dependent morphology of dislocation networks,and their respective advantages and disadvantages are *** the simulations,it is observed that various lattice orientations and model types lead to different morphologies of dislocation *** on the analysis of average atomic energy and dislocation characteristics,the(100)orientation model has a more regular dislocation network,lower energy and better stability than the(110)and(111)orientation models after MD relaxation,which are supported by previous experimental and numerical ***,the cubic-type model has lower energy and better stability than the sandwich-type *** will be helpful for choosing a more appropriate and reasonable model for simulating the interfacial dislocation networks of Ni-based single-crystal superalloys.

关键词： Ni-based single-crystal superalloys Molecular dynamics simulation Orientation Interfacial dislocation networks