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On Singular Sets of Local Solutions to p-Laplace Equations

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Chinese Annals of Mathematics,Series B 2008年第5期29卷 521-530页

作者： Hongwei lou key Laboratory of Mathematics for Nonlinear Sciences School of Mathematical Sciences Fudan University Shanghai 200433 China

The author proves that the on the singular set of a local solution to existence of an optimal control problem. right-hand term of a p-Laplace equation is zero the equation. Such a result is used to study the

关键词： Singular set p-Laplace equation Optimal control Existence

Macro-experimental study from steady soliton to chaotic lattice soliton

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Chinese Science Bulletin 1997年第2期42卷 120-123页

作者： Lin, J Li, y lou, Sy yu, J Huang, GX Department of Physics Zhejiang Normal University Jinhua China Institute of Modem Physics Ningbo Normal College Ningbo China Department of Physics Shaoxing Normal College Shaoxing China Department of Physics East China Normal University Shanghai China

OVER three decades, since the wide applications of the soliton phenomena in almost all the physical fields, the theoretical, experimental and applied studies of the soliton have become an active research topic. The direct macro-observation of the soliton phenomana is one of the important problems. Since the observation of Wu et al. on the nonpropagating fluid solitons in 1984, the nonlinear systems on the vibratmg table have offered us a good experimental field. Some nonlinear excitations of the macro-monatomic lattice have been observed by Denardo et al. Ref. reported the observation of the localized structure of the granular sys-

关键词： lattice soliton amplitude recurrence experimental study.

Radiative Effects on Torrential Rainfall during the Landfall of Typhoon Fitow(2013)

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Advances in Atmospheric Sciences 2016年第1期33卷 101-109页

作者： Lingyun lou Xiaofan LI School of Earth Sciences Zhejiang University

Cloud microphysical and rainfall responses to radiative processes are examined through analysis of cloud-resolving model sensitivity experiments of Typhoon Fitow（2013） during *** budget analysis shows that the increase in the mean rainfall caused by the exclusion of radiative effects of water clouds corresponds to the decrease in accretion of raindrops by cloud ice in the presence of radiative effects of ice clouds,but the rainfall is insensitive to radiative effects of water clouds in the absence of radiative effects of ice *** increases in the mean rainfall resulting from the removal of radiative effects of ice clouds correspond to the enhanced net *** increases（decreases） in maximum rainfall caused by the exclusion of radiative effects of water clouds in the presence（absence） of radiative effects of ice clouds,or the removal of radiative effects of ice clouds in the presence（absence） of radiative effects of water clouds,correspond mainly to the enhancements（reductions） in net *** mean rain rate is a product of rain intensity and fractional rainfall *** radiation-induced difference in the mean rain rate is related to the difference in rain *** radiation-induced difference in the maximum rain rate is associated with the difference in the fractional coverage of maximum rainfall.

关键词： radiative effects rainfall maximum rainfall rain intensity fractional rainfall coverage net condensation hydrometeor change

Halanay-type inequality with delayed impulses and its applications

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Science China(Information Sciences) 2019年第9期62卷 158-167页

作者： yaqi WANG Jianquan LU yijun lou The Jiangsu Provincial key Laboratory of Networked Collective Intelligence School of MathematicsSoutheast University Department of Applied Mathematics The Hong Kong Polytechnic University

In this study, some properties of a novel Halanay-type inequality that simultaneously contains impulses and delayed impulses are investigated. Two concepts with respect to average impulsive gain are proposed to describe hybrid impulsive strength and hybrid delayed impulsive strength. Then, using the obtained results, two stability criteria are derived for the linear systems with impulses and delayed *** is found that the stability of impulsive systems is robust with respect to delayed impulses of which the magnitude strength is relatively small. Whereas, if the impulse strength is small, the time-delayed impulses can also promote the stability of unstable systems. Two numerical examples are employed to illustrate the efficiency of our results.

关键词： Halanay-type inequality hybrid impulses average impulsive gain delayed impulses linear impulsive systems

MdDGk3-like as a negative regulator participates in ALA-induced PP2AC to promote stomatal opening in apple leaves

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Horticultural Plant Journal 2023年第5期9卷 898-908页

作者： Zheng Chen yingrui lou Liangju Wang College of Horticulture Nanjing Agricultural UniversityNanjing 210095China

5-Aminolevulinic acid(ALA)can inhibit abscisic acid(ABA)-induced stomatal ***,the molecular mechanism is *** this study,we found that ALA upregulated the MdPP2AC expression and PP2A activity in the apple(Malus domestica ***.‘Fuji’)*** the promoter of MdPP2AC as bait,a diacylglycerol kinase MdDGk3-like was selected by the yeast One Hybrid(y1H)from the cDNA library of the epidermis of apple leaves treated by exogenous *** to binding the promoter of MdPP2AC,MdDGk3-like was found to inhibit the transcription activity of MdPP2AC promoter,while ALA significantly eliminated the role of *** tobacco leaves,MdDGk3-like was localized in the nucleus of stomatal guard ***,MdDGk3-like might act as a transcription factor negatively regulating MdPP2AC expression and causing stomatal *** further identify MdDGk3-like functions,several transiently transgenic apple leaves(including overexpression and interference)were *** results revealed that overexpression of MdDGk3-like promoted stomatal closure by increasing Ca^(2+)and H_(2)O_(2)and decreasing flavonol levels in the guard ***,MdDGk3-like(i)led the stomatal opening with lower levels of Ca^(2+)and H_(2)O_(2)but higher *** on these,we proposed a new hypothesis that ALA up-regulated MdPP2AC expression via negatively regulating the expression of MdDGk3-like to up-regulate PP2A expression and the enzyme activity,which improved the stomatal *** it was the first time that MdDGk3-like was showed to act as a transcription factor,the proposed model provided a new insight onto the mechanisms of ALA-induced stomatal opening.

关键词： ALA Apple MdDGk3-like MdPP2AC Stomatal opening Transcription factor

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张力腿平台涡激非线性振动稳定性研究

中国造船 1992年第4期33卷 85-97页

作者：董艳秋 Jack y.k.lou 天津大学 Texas A&M University U. S. A.

本文研究海洋张力腿平台的张力腿由于涡激产生的非线性振动的稳定性。其数学模型既考虑由平台升沉运动而产生的中心激振,又计及流体平方阻尼力作用。文中着重研究当涡激频率与结构的第一固有频率相接近时,张力腿产生不稳定运动的可能性... 详细信息

本文研究海洋张力腿平台的张力腿由于涡激产生的非线性振动的稳定性。其数学模型既考虑由平台升沉运动而产生的中心激振,又计及流体平方阻尼力作用。文中着重研究当涡激频率与结构的第一固有频率相接近时,张力腿产生不稳定运动的可能性以及稳定解的特性,考查分叉及浑沌是否发生。

关键词：海上平台涡激非线性振动稳定性

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深水海洋平台张力腿涡激非线性振动响应研究

中国造船 1992年第3期33卷 80-92页

作者：董艳秋 Jack y.k.lou 天津大学 Texas A & M Universny

本文研究了深水张力腿平台的张力腿在不均匀流及波、流联合作用下由涡串激起的横向振动。在数学模型中既考虑由于平台的升沉运动而产生的中心激振,又计及流体平方阻尼力作用。文中采用多项Galerkin法和数值积分以及Runge-kutta法进行数... 详细信息

本文研究了深水张力腿平台的张力腿在不均匀流及波、流联合作用下由涡串激起的横向振动。在数学模型中既考虑由于平台的升沉运动而产生的中心激振,又计及流体平方阻尼力作用。文中采用多项Galerkin法和数值积分以及Runge-kutta法进行数值解。以Conoco′s Hutton张力腿平台为例,计算了结构的动力响应。讨论了多项位移表达对动位移、动弯矩和切力的影响,以及升力系数、阻力系数和中心激振参数对响应的影响等。

关键词：海洋平台张力腿非线性振动

Model evaluations for winter orographic clouds with observations

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Chinese Science Bulletin 2011年第1期56卷 76-83页

作者： lou XiaoFeng BREED Dan State key Laboratory of Severe Weather (LaSW) Chinese Academy of Meteorological Sciences Beijing 100081 China key Laboratory for Cloud Physics and Weather Modification of China Meteorological Administration Beifing 100081 China National Center for Atmospheric Research Boulder C080305 USA

The Real-Time Four-Dimensional Data Assimilation (RT-FDDA) system is used for orographic snowpack *** model has three nested domains with the grid spacing of 18,6 and 2 *** evaluate the simulations of winter orographic clouds and precipitation,comparisons are made between model simulations and observations to determine how the model simulates the cloud distribution,cloud height,cloud vertical profiles and snow *** simulated results of the 02:00 UTC cycling with 2-km resolution are used in the *** observations include SNOTEL,ceilometer,sounding and satellite data,from the ground to *** verification of these observations indicates that the Weather Research and Forecast (WRF) RT-FDDA system provides good *** is better to use data within the forecast period of 2-16 h *** the horizontal wind component near the ground has some bias,and the simulated clouds are a little higher and have a little more coverage than observed,the simulated precipitation is a little weaker than *** results of the comparison show that the WRF RT-FDDA model provides good simulations and can be used in orographic cloud seeding.

关键词：地形云云模型冬季模型模拟 WRF模式评价四维资料同化模拟降水

Effects of the Water-Cement Ratio and the Molding Temperature on the Hydration Heat of Cement

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Journal of Wuhan University of Technology(Materials Science) 2024年第4期39卷 990-998页

作者：代金鹏 HE Jie WANG Qicai lou Xuyu National and Provincial Joint Engineering Laboratory of Road&Bridge Disaster Prevention and Control Lanzhou Jiaotong UniversityLanzhou 730070China Civil Engineering Department Lanzhou Jiaotong UniversityLanzhou 730070China

The effects of the water-cement ratio and the molding temperature on the hydration heat of cement were investigated with semi-adiabatic *** specimens were prepared with water-cement ratios of 0.31,0.38,and 0.45,and the molding temperature was specified at 10 and 20℃.The experimental results show that,as the water-binder ratio increases,the value of the second temperature peak on the temperature curve of the cement paste decreases,and the age at which the peak appears is *** higher the water-cement ratio,the higher the hydration heat release in the early period of cement hydration,but this trend reverses in the late *** are intersection points of the total hydration heat curve of the cement pastes under the influence of the water-cement ratio,and this law can be observed at both molding *** the increase in the molding temperature,the age of the second temperature peak on the temperature curve of the cement paste will advance,but the temperature peak will *** higher the molding temperature,the earlier the acceleration period of the cement hydration began,and the larger the hydration heat of the cement in the early stage,but the smaller the total heat in the late period.A subsection function calculation model of the hydration heat,which was based on the existing models,was proposed in order to predict the heat of the hydration of the concrete.

关键词： semi-adiabatic calorimetry hydration heat water-cement ratio molding temperature modeling