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Measured boundary parameterization based on Poisson's equation

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Journal of Zhejiang University-Science C(Computers and Electronics) 2010年第3期11卷 187-198页

作者： Jun-jie CAO zhi-xun SU xiu-ping LIU Hai-chuan BI School of Mathematical Sciences Dalian University of Technology Dalian 116024 China

One major goal of mesh parameterization is to minimize the conformal distortion. Measured boundary parameteri-zations focus on lowering the distortion by setting the boundary free with the help of distance from a center vertex to all the boundary vertices. Hence these parameterizations strongly depend on the determination of the center vertex. In this paper,we introduce two methods to determine the center vertex automatically. Both of them can be used as necessary supplements to the existing measured boundary methods to minimize the common artifacts as a result of the obscure choice of the center vertex. In addition,we propose a simple and fast measured boundary parameterization method based on the Poisson's equation. Our new approach generates less conformal distortion than the fixed boundary methods. It also generates more regular domain boundaries than other measured boundary methods. Moreover,it offers a good tradeoff between computation costs and conformal distortion compared with the fast and robust angle based flattening (ABF++).

关键词： Mesh parameterization Poisson's equation Measured boundary

Performance investigation of intercooler operating in wet condition using distributed parameter model

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航空动力学报 2014年第7期29卷 1598-1605页

作者： ZHOU Ya-feng LIU gui-lin HAN Ya-hui YANG Chun-xin ZHU zhi-li School of Energy and Power Engineering Beijing University of Aeronautics and Astronautics Shenyang Engine Design and Research Institute Aviation Industry Corporation of China School of Aeronautic Science and Engineering Beijing University of Aeronautics and Astronautics Mechanical Engineering Department Army Aviation Institutethe Chinese People's Liberation Army

The performance of a marine gas turbine intercooler operating in wet condition was *** intercooler was a cross-flow plate-fin heat exchanger that used air and pure water as its working fluids at the hot and cold sides,*** heat transfer performance and the water vapor condensation were investigated for a relative humidity of the inlet air that reached 100% during warship *** condensation of the water vapors increased the hot side outlet temperature by a certain amount,which could in turn influence the performance of the compressor *** condensate film thickness and the void fraction were calculated based on an annular two-phase flow *** is found that water vapor condensation in hot flow channel increases the outlet temperature with a maximum value of 7.3℃ in the case of 100% relative *** calculated liquid film thickness reaches a maximum value of 4μm,which indicates negligible thermal resistance to heat *** results of liquid film thicknesses also provide a qualitative prediction of the diameter distribution of the condensate water droplets.

关键词： intercooler wet condition plate-fin heat exchanger condensation film thickness

Total Glycosides of Ranunculus Japonius Prevent Hypertrophy in Cardiomyocytes via Alleviating Chronic Ca^(2+) Overload

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Chinese Medical Sciences Journal 2015年第1期30卷 37-43页

作者： Hong-liang Dai gui-zhi Jia Song Zhao Department of Community Health Nursing Liaoning Medical University Department of Biochemistry and Molecular Biology Liaoning Medical University Centre of Scientific Experiment Liaoning Medical University

Objective To evaluate the in vitro anti-hypertrophic effect of total Glycosides of Ranunculus Japonius （TGRJ）. Methods Neonatal rat cardiomyocytes were cultured and hypertrophy was induced by adminis- trating isoproterenol （ISO, 10 gmol/L） or angiotensin Ⅱ （AngⅡ, 1 gmol/L） for 48 hours. In the treatment groups, cells were pretreated with TGRJ （0.3 g/L） for 30 minutes prior to hypertrophic stimuli. The anti-hypertrophic effects of TGRJ were examined by measuring cell size, total protein content, and protein synthesis. Intracellular free Ca2＋ concentration （[Ca2＋]i） was evaluated using fluorescence dye Fura-2/AM. Sacroplasmic/endoplasmic reticulum Ca2＋ ATPase 2a （SERCA2a）, atrial natriuretic peptide （ANP）, B-type natriuretic peptide （BNP）, and beta-myosin heavy chain （β-MHC） protein expression levels were measured by Western blotting. SERCA2a activity was assayed by p-nitrophenal phosphate disodium salt hexahydrate method. Results Increased cell size, total protein content, and protein synthesis following ISO or Ang II stimulation were significantly inhibited by pretreatment with TGRJ （all P〈0.05）. This anti-hypertrophic effect of TGRJ was confirmed by its suppressing effect on elevated expression of the three hypertrophic related genetic markers, ANP, BNP, and ^-MHC. In addition, TGRJ inhibited ISO or Ang Ⅱ induced up-regulation of [Ca2＋] under chronic but not acute conditions. And ISO or Ang Ⅱ induced down-regulation of SERCA2a expression and activity was also effectively rectified byTGRJ pretreatment. Conclusions The results of present study suggested that TGRJ could prevent ISO or Ang Ⅱ induced cardiac hypertrophy through improving chronic [Ca2＋]i disorder, might via normalizing SERCA2a expression and activity.

关键词： total Glycosides of RanunculusJaponius cardiac hypertrophy isoproterenol angiotensin Ⅱ Ca2+ sacroplasmic/endoplasmic reticulum Ca2+ ATPase 2a

Faithful Teleportation of an Unknown Atomic-Entangled State Without Bell-State Measurement

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Communications in Theoretical Physics 2008年第3期49卷 621-624页

作者： LIN xiu LI Hong-Cai YANG Rong-Can HUANG zhi-Ping School of Physics and OptoElectronics Technology Fujian Normal University Fuzhou 350007 China

An alternative scheme is proposed for teleportation of an unknown atomic-entangled state. The scheme is based on the resonant interaction of a two-mode cavity field with a A-type three-level atom. In contrast with the previously proposed scheme of [Commun. Theor. Phys. 47 （2007） 253], the present scheme is ascendant, since the fidelity is 1.0 in principle similarly without the Bell-state measurement. The scheme may be generalized to not only the teleportation of the cavity-mode-entangled-state but also the teleportation of the multi-atomic entangled states included in generalized GHZ states. And the scheme is experimentally feasible based on the current cavity QED technique.

关键词： teleportation A-type atom two-mode cavity field Bell-state measurement

Mathematical model of coupled thermo-mechanical behavior during plane strain compression of 06Cr19Ni9NbN steel

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Journal of Iron and Steel Research International 2018年第11期25卷 1179-1188页

作者： Yong-xing Jiao Yue Xu Jian-sheng Liu Jing-dan Li xiu-zhi Zhang College of Materials Science and Engineering Taiyuan University of Science and Technology Taiyuan 030024ShanxiChina

The process of plane strain compression of 06Cr19Ni9NbN steel was carried out in the temperature range of 1000-1200℃ and the reduction ratio range of 10-50%.Combining the finite element numerical simulation,a new constitutive model of thermal deformation was established, which provides the theoretical basis to optimize the plarie strain compression process of the *** temperature and grain size at different regions were achieved by experiment and simulation,*** to the results,the mathematical models of stress and temperature during the plane strain compression were established by mathematical analysis *** new temperature models were established in three regions,respectively,and the stress models took account of the variation of temperature and'st^rain ***,by comparing the results of calculation,numerical simulation and experiment,the accuracy and validity of these mathematical models were verified.

关键词： Plane strain compression Coupled thermo-mechanical behavior 06Cr19Ni9NbN steel Numerical simulation Mathematical model

STUDY ON THE EFFECTS OF TLCP ON PYROLYSIS OF PET AND ITS RETARDANT MECHANISM

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Chinese Journal of Polymer Science 2008年第1期26卷 111-116页

作者： Deng, Yi Wang, Yu-zhong Zong, zhi-jing Liu, xiu-hua Du, Xiao-hua China Acad Engn Phys Mianyang 621900 Peoples R China Sichuan Univ Ctr Degradable & Flame Retardant Polymer Mat Chengdu 610064 Peoples R China

The flame retardancy of aromatic thermotropic liquid crystal phosphorus-containing copolyester,TLCP,on PET was *** results show that the presence of TLCP promotes char formation of the substrate and enhances thermal stability of char,hence delay its *** pictures show that the char formed from PET/TLCP is more compact, therefore is more resistant to fire and heat than that from pure *** gas analysis by I.R measurements indicates that TLCP would decompose to produce phosphor...

关键词： Thermotropic liquid crystal copolymer Flame retardant PET

Telecloning Quantum States with Trapped Ions

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Communications in Theoretical Physics 2007年第5X期48卷 827-830页

作者： YANG Rong-Can LI Hong-Cai LIN xiu HUANG zhi-Ping School of Physics and OptoElectronics Technology Fujian Normal University Fuzhou 350007 China

We propose a scheme for telecloning quantum states with trapped ions. The scheme is based on a single ion interacting with a single laser pulse. In the protocol, an ion is firstly measured to determine whether the telecloning succeeds or not, and then another ion is detected to complete the whole procedure. The required experimental techniques are within the scope of what can be obtained in the ion-trap setup.

关键词： telecloning W states state-dependent trapped ions

Simple Scheme for Directly Measuring Concurrence of Two-Qubit Pure States in One Step

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Communications in Theoretical Physics 2009年第2期51卷 252-254页

作者： YANG Rong-Can LIN xiu HUANG zhi-Ping LI Hong-Cai School of Physics and Opto-Electronics Technology Fujian Normal University Fuzhou 350007 China

In the present work, a simple scheme for the direct measurement of the concurrence of two-qubit pure states is proposed. The scheme is based on trapped ions and only needs one step when the two identical pure states are given. The vibrational mode in our proposal is only virtually excited, which is important in view of ***, the scheme is feasible based on current technologies.

关键词： concurrence trapped ions measurement one step

Reliability Evaluation of Machine Center Components Based on Cascading Failure Analysis

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Chinese Journal of Mechanical Engineering 2017年第4期30卷 933-942页

作者： Ying-zhi Zhang Jin-Tong Liu gui-Xiang Shen Zhe Long Shu-Guang Sun College of Mechanical Science and Engineering Jilin University College of Management Science and Engineering Shandong Normal University

In order to rectify the problems that the com- ponent reliability model exhibits deviation, and the evalu- ation result is low due to the overlook of failure propagation in traditional reliability evaluation of machine center components, a new reliability evaluation method based on cascading failure analysis and the failure influ- enced degree assessment is proposed. A direct graph model of cascading failure among components is established according to cascading failure mechanism analysis and graph theory. The failure influenced degrees of the system components are assessed by the adjacency matrix and its transposition, combined with the Pagerank algorithm. Based on the comprehensive failure probability function and total probability formula, the inherent failure proba- bility function is determined to realize the reliability evaluation of the system components. Finally, the method is applied to a machine center, it shows the following： 1） The reliability evaluation values of the proposed method are at least 2.5% higher than those of the traditional method; 2） The difference between the comprehensive and inherent reliability of the system component presents a positive correlation with the failure influenced degree ofthe system component, which provides a theoretical basis for reliability allocation of machine center system.

关键词： s Cascading failure Machine centercomponents Reliability evaluation Pagerank algorithmInfluenced degree