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THREE-DIMENSIONAL ANALYSIS OF FUNCTIONALLY GRADED PLATE BASED ON THE HAAR WAVELET METHOD

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Acta Mechanica Solida Sinica 2007年第2期20卷 95-102页

作者： Zhang chun Zhong zheng School of Aerospace Engineering and Applied mechanics Tongji University Shanghai 200092 China School of Civil Engineering and Architecture Nanchang University Nanchang 330031 China

A three-dimensional analysis of a simply-supported functionally graded rectangular plate with an arbitrary distribution of material properties is made using a simple and effective method based on the Haar wavelet. With good features in treating singularities, Haar series solution converges rapidly for arbitrary distributions, especially for the case where the material properties change rapidly in some regions. Through numerical examples the influences of the ratio of material constants on the top and bottom surfaces and different material gradient distributions on the structural response of the plate to mechanical stimuli are studied.

关键词： functionally graded material rectangular plate Haar wavelet three-dimensional analysis

铝在N,N-二甲基丁胺-氯化铝熔盐中的低温电沉积

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有色金属（冶炼部分） 2025年第1期 72-76,98页

作者：郑勇王倩罗家还李玲郑永军田大勇安阳工学院化学与环境工程学院安阳市低温电解铝与节能减排重点实验室河南安阳455000 中国科学院过程工程研究所离子液体清洁过程北京市重点实验室北京100190

开发新型的电解质以及低温电解铝技术是促进铝工业改革创新的重要途径之一。采用N,N-二甲基丁胺、无水氯化铝为原料,混合制备得到了新型低温熔盐。结果证明,该熔盐为氯铝酸型离子液体,可以在其中实现铝的低温电沉积。在此基础上,系统考... 详细信息

开发新型的电解质以及低温电解铝技术是促进铝工业改革创新的重要途径之一。采用N,N-二甲基丁胺、无水氯化铝为原料,混合制备得到了新型低温熔盐。结果证明,该熔盐为氯铝酸型离子液体,可以在其中实现铝的低温电沉积。在此基础上,系统考察了试验温度、电解电位、反应时间对铝的电沉积、表面形貌和化学组成的影响规律,获得了纯度较高的金属铝。有关研究为低温电解铝技术的发展及其在铝精炼和电镀铝中的应用提供了一定的科学依据。

关键词：铝低温熔盐离子液体电沉积电解

Synthesis of a new series of anti-rhinovirus compounds

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Chinese Chemical Letters 2007年第4期18卷 400-402页

作者： Shi yong Fan chun Lai Mi Jun Yang Song Li Zhi Bing zheng Institute of Pharmacology and Toxicology Academy of Military Medical Sciences Beijing 100850 China School of Pharmaceutical Engineering Shenyang Pharmaceutical University Shenyang 110016 China

The synthesis of a series of 3,6-dichloropyridazine derivatives was described. In vitro experiment, all compounds exhibited an anti-rhinovirus activity, and one of the compounds 6g showed the comparable activity as ou... 详细信息

关键词： 3,6-Dichoropyridazine derivatives Synthesis Anti-rhinovirus

Cholesterol metabolism: physiological versus pathological aspects in intracerebral hemorrhage

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Neural Regeneration Research 2025年第4期20卷 1015-1030页

作者： Ruoyu Huang Qiuyu Pang Lexin zheng Jiaxi Lin Hanxi Li Lingbo Wan Tao Wang Department of Forensic Science School of Basic Medicine and Biological SciencesSuzhou Medicine College of Soochow UniversitySuzhouJiangsu ProvinceChina

Cholesterol is an important component of plasma membranes and participates in many basic life functions,such as the maintenance of cell membrane stability,the synthesis of steroid hormones,and *** plays a key role in the establishment and maintenance of the central nervous *** brain contains 20%of the whole body’s cholesterol,80%of which is located within myelin.A huge number of processes(e.g.,the sterol regulatory element-binding protein pathway and liver X receptor pathway)participate in the regulation of cholesterol metabolism in the brain via mechanisms that include cholesterol biosynthesis,intracellular transport,and *** brain injuries or diseases involving crosstalk among the processes above can affect normal cholesterol metabolism to induce detrimental ***,we hypothesized that cholesterol-related molecules and pathways can serve as therapeutic targets for central nervous system *** hemorrhage is the most severe hemorrhagic stroke subtype,with high mortality and *** cholesterol levels are associated with the risk of intracerebral ***,secondary pathological changes after intracerebral hemorrhage are associated with cholesterol metabolism dysregulation,such as neuroinflammation,demyelination,and multiple types of programmed cell *** cholesterol accumulation in the brain has been found after intracerebral *** this paper,we review normal cholesterol metabolism in the central nervous system,the mechanisms known to participate in the disturbance of cholesterol metabolism after intracerebral hemorrhage,and the links between cholesterol metabolism and cell *** also review several possible and constructive therapeutic targets identified based on cholesterol metabolism to provide cholesterol-based perspectives and a reference for those interested in the treatment of intracerebral hemorrhage.

关键词： cell death cholesterol metabolism intracerebral hemorrhage myelination therapeutic target

Compensate Effect Under Time-Scale Transformation in Vaidya-Bonner Space-Time

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Chinese Physics Letters 1996年第7期13卷 492-495页

作者： MA yong ZHAO zheng Department of Physics Chongqing Teachers CollegeChongqing 630047 Department of Physics Beijing Normal UniversityBeijing 100875

The Hawking effect in the Vaidya-Bonner space-time can be considered as a compensate effect of the scale transformation of coordinate *** gauge potential is the contraction of the affine *** is found that the rate of change of temperature can be obtained as the pure gauge potential of the compensate field,in addition to the Hawking temperature which was known from the stationary black holes.

关键词： gauge Transformation Vaidya

Shear-wave velocity structure of the crust and uppermost mantle in the Shanxi rift zone

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Earthquake Science 2015年第2期28卷 135-149页

作者： Meiqing Song yong zheng chun Liu Li Li Xia Wang Earthquake Prediction Center Earthquake Administration of Shanxi Province Institute of Geodesy and Geophysics Chinese Academy of Sciences Earthquake Administration of Shaanxi Province Earthquake Administration of Shanxi Province

The Shanxi rift zone is one of the largest and active Cenozoic grabens in the world, studying the velocity structure of the crust and upper mantle in this region may help us to understand the mechanisms of rift processes and the seismogenic environment of active seismicity in continental rifts. In this work, using the broadband seismic data of Shanxi, Hebei, Henan, Shaanxi provinces, and the Inner Mongolia Autonomous Region from February 2009 to November 2011, we have picked out 350 high-quality phase velocity dispersion curves of fundamental mode Rayleigh waves at periods from 8 to 75 s, and Rayleigh wave phase velocity maps have been constructed from 8 to 75 s period with horizontal resolution ranging from 40 to 50 km by two-station surface-wave tomography. Then, using a genetic algorithm, a 3D shear-wave speed model of the crust and uppermost mantle have been derived from these maps with a spatial resolution of 0.4° × 0.4°. Four characteristics can be outlined from the results：（1） Except in the Datong volcanic zone, in the depth range of 11-30 km, the location of a transition zone between the highand low-velocity regions is in agreement with the seismicity pattern in the study region, and the earthquakes are mostly concentrated near this transition zone; （2） In the depth range of 31-40 km, shear-wave velocities are higher to the south of the Taiyuan Basin and lower to the north, which is similar to the distribution pattern of Moho depth variations in the Shanxi region; （3） The shear-wave velocity pattern of higher velocities to the south of 38×N and lower velocities to the north is found to be consistent with that from the upper crustal levels to depth of 70 km. At the deeper depths, the spatial scale of the low-velocity anomalies zone in the north is gradually shrinking with depth increasing, the low-velocity anomalies are gradually disappearing beneath the Datong volcanic zone at the depth of 151-200 km. We proposed that the root of the Datong volcano may reac

关键词： Shanxi rift zone Two-station methodSurface wave Shear-wave velocity Tomography

Special Focus on Millimeter Wave Communications Techniques and Devices for 5G—Editorial

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Science China(Information Sciences) 2017年第8期60卷 5-6页

作者： Fu-chun zheng Gang WU Harbin Institute of Technology The University of York University of Electronic Science and Technology of China

Due to the rapid development of cost-effective CMOS solutions and recent experimental validation on communications over millimeter wave(mm Wave)bands,which span from 30 to 300 GHz,mm Wave communications technologies are being considered for 5G mobile systems to provide ultra-high data rates for front haul,back haul,and short or middle range broadband *** to the array gain of massive multiple-input multiple-output(m-MIMO)antenna arrays,the heavy path loss of mmWave

关键词： Wave for Editorial Special Focus on Millimeter Wave Communications Techniques and Devices for 5G MIMO on

Towards combining multiple geophysical datasets to determine earthquake source parameters in China

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Science China Earth Sciences 2016年第11期59卷 2260-2262页

作者： zheng yong LIU ChengLi State Key Laboratory of Geodesy and Earth's Dynamics Institute of Geodesy and Geophysics Chinese Academy of Sciences

*** of conventional seismic studies on earthquake source parameters Earthquake source parameters,including magnitude,location,focal mechanism,rupture process are key factors for understanding seismogenic environment,mitigating seismic hazards,estimating earthquake triggering,and tectonic ***,source parameters are determined by seismological *** example,Fang L H et al.（2014）relocated the 2012 Ms6.6 Xinjiang Xinyuan earthquake sequence using local seismograms based on the double difference method,

关键词： geophysical tectonic rupture triggering magnitude estimating moderate epicenter constrain spatially

NUMERICAL SIMULATIONS OF A CENTERED CONDUCTING BODY ON NATURAL CONVECTION AND HEAT TRANSFER IN AN ENCLOSURE

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Journal of Hydrodynamics 2005年第5期17卷 539-545页

作者： LI Guang-zheng HUANG Jian-chun College of Civil Engineering and Mechanics Huazhong University of Science and Technology Wuhan430074 China

Numerical simulations are performed for laminar natural convection heat transfer from a centered conducting body enclosed in a square cavity. A high accuracy un steady numerical method is used, combining the unique condition of the pressure, the convergent solutions and the streamfunction value of the inside heat conducting body are given simultaneously. Two examples are simulated with this numerical method and compared with the experimental results. The results of the numerical solutions are consistent with the experimental results. It shows that the numerical method is valid and feasible.

关键词： natural convection in an enclosure inside heat conducting body stream value of solid walls unsteady numerical method