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Science China(Technological Sciences) 2010年第10期53卷 2756-2764页

作者： XIE ZhiHui, CHEN LinGen & SUN FengRui postgraduate school, Naval University of Engineering, Wuhan 430033, China postgraduate school Naval University of Engineering

In this paper,constructal optimization of the twice Y-shaped assemblies of fins with six freedom degrees (characteristic parameters of geometry) is performed by employing finite element method and taking dimensionless maximum thermal resistance as a performance index,and the heat transfer performance of the twice Y-shaped assemblies of fins under various conditions with different freedom degrees are analyzed. The results show that the twice assemblies can improve the heat transfer performance of Y-shaped fin remarkably,and the minimum maximum thermal resistance of the twice Y-shaped assemblies of fins decreases by 36.37% compared with that of once Y-shaped assembly of fins. It is also proved again that the larger the number of freedom degrees for evolving is,the more perfect the system performance is. The effects of different characteristic parameters of geometry on the performance of the twice Y-shaped assemblies of fins are different,one should pay different attention to these parameters in practical engineering designs. The effects of two angles on the maximum thermal resistance are larger,but the optima of the two angles are robust. The effects of two height ratios on the maximum thermal resistance are more remarkable than those of two thickness ratios.

关键词： constructal theory fin multi-scale enhanced heat transfer generalized thermodynamic optimization

Evaluation of Haney-Type Surface ThermalBoundary Conditions Using a CoupledAtmosphere and Ocean Model

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Advances in Atmospheric Sciences 2001年第3期18卷 355-375页

作者： Peter C. Chu 陈玉春吕世华 Department of Oceanography Naval Postgraduate School

A coupled atmosphere-ocean model developed at the Institute for Space Studies at NASA Goddard Space Flight Center (Russell et al., 1995) was used to verify the validity of Haney-type surface thermal boundary condition, which linearly connects net downward surface heat fluxQ to air/sea temperature difference ΔT by a relaxation coefficientk. The model was initiated from the National Centers for Environmental Prediction (NCEP) atmospheric observations for 1 December 1977, and from the National Ocean Data Center (NODC) global climatological mean December temperature and salinity fields at 1°x 1° resolution. The time step is 7.5 minutes. We integrated the model for 450 days and obtained a complete model-generated global data set of daily mean downward net surface fluxQ, surface air temperatureT A, and sea surface temperatureT O. Then, we calculated the cross-correlation coefficients (CCC) betweenQ and ΔT. The ensemble mean CCC fields show (a) no correlation betweenQ and ΔT in the equatiorial regions, and (b) evident correlation (CCC≥0.7) betweenQ and ΔT in the middle and high latitudes. Additionally, we did the variance analysis and found that whenk=120 W m?2K?1, the two standard deviations, σQ and σκδT , are quite close in the middle and high latitudes. These results agree quite well with a previous research (Chu et al., 1998) on analyzing the NCEP re-analyzed surface data, except that a smaller value ofk (80 W m?2K?1) was found in the previous study. Key words Air-sea coupled system - Ocean surface fluxes - Surface thermal boundary condition

关键词： Air-sea coupled system Ocean surface fluxes Surface thermal boundary condition

“Volume-Point” heat conduction constructal optimization with entransy dissipation minimization objective based on rectangular element

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Science China(Technological Sciences) 2008年第8期51卷 1283-1295页

作者： WEI ShuHuan, CHEN LinGen & SUN FengRui postgraduate school, Naval University of Engineering, Wuhan 430033, China postgraduate school Naval University of Engineering

By taking equivalent thermal resistance, which reflects the average heat conduc- tion effect and is defined based on entransy dissipation, as optimization objective, the "volume to point" constructal problem of how to discharge the heat generated in a fixed volume to a heat sink on the border through relatively high conductive link is re-analyzed and re-optimized in this paper. The constructal shape of the control volume with the best average heat conduction effect is deduced. For the elemental area and the first order construct assembly, when the thermal current density in the high conductive link is linear with the length, the optimized shapes of assemble based on the minimization of entransy dissipation are the same as those based on minimization of maximum temperature difference, and the mean tem- perature difference is 2/3 of the maximum temperature difference. For the second and higher order construct assemblies, the thermal current densities in the high conductive link are not linear with the length, and the optimized shapes of assem- ble based on the minimization of entransy dissipation are different from those based on minimization of maximum temperature difference. For the same parame- ters, the constructs based on minimization of entransy dissipation and the con- structs based on minimization of maximum temperature difference are compared, and the results show that the constructs based on entransy dissipation can de- crease the mean temperature difference better than the constructs based on mini- mization of maximum temperature difference. But with the increase of the number of the order, the mean temperature difference does not always decrease, and there exist some fluctuations. Because the idea of entransy describes the heat transfer ability more suitably, all of the heat conduction constructal problems may be re-optimized based on it.

关键词： constructal theory entransy dissipation volume-point heat conduction generalized thermodynamic optimi- zation

Constructal optimization of discrete and continuous-variable cross-section conducting path based on entransy dissipation rate minimization

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Science China(Technological Sciences) 2010年第6期53卷 1666-1677页

作者： WEI ShuHuan,CHEN LinGen & SUN FengRui postgraduate school,Naval University of Engineering,Wuhan 430033,China postgraduate school Naval University of Engineering

Using constructal entransy dissipation rate minimization method based on discrete variable cross-section conducting path,constructal optimizations of elemental area with variable cross-section conducting path are performed,and the results are compared with the optimization results of elemental area with the constant cross-section conducting *** comparison shows that the minimum mean temperature difference based on elemental area with variable cross-section conducting path increases and approaches a constant as the assembly's order increases,but the minimum mean temperature difference based on elemental area with constant cross-section conducting path decreases and approaches a constant as the assembly's order *** difference between them is caused by the different dimensionless mean temperature difference of the first order assembly.A universal constructal optimization method by self similar organization to improve heat transfer ability and its corresponding rule are *** the constructal optimization method by self similar organization based on entransy dissipation rate minimization objective,the mean temperature difference approaches a constant as the assembly's order increases.

关键词： constructal theory entransy entransy dissipation area-point conduction generalized thermodynamic optimization

Improvement of tree-like network constructal method for heat conduction optimization

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Science China(Technological Sciences) 2006年第3期49卷 332-341页

作者： WU Wenjun CHEN Lingen SUN Fengrui postgraduate school Naval University of Engineering Wuhan 430033 China Postgraduate School Naval University of Engineering Wuhan 430033 China Postgraduate School Naval University of Engineering Wuhan 430033 China

The analysis of the “tree-like network” construct method has been repeated. The high effective conduction channel distribution has been optimized again, without the premise that the new order assembly construct must be assembled by the optimized last order construct. It is proved that the “tree-like network” construct method is faultiness. A more optimal construct is obtained,; when the thermal conductivity; the proportion of the two heat conduction materials are constant, the limit of the minimum heat resistance is derived. All these conclusions can be used to guide the engineering application.

关键词： constructal theory, 'tree-like network' construct method, high effective conduction channel distribution, generalized thermodynamic optimization.

Entransy dissipation minimization for liquid-solid phase change processes

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Science China(Technological Sciences) 2010年第4期53卷 960-968页

作者： XIA ShaoJun,CHEN LinGen & SUN FengRui postgraduate school,Naval University of Engineering,Wuhan 430033,China postgraduate school Naval University of Engineering

The liquid-solid phase change process of a simple one-dimensional slab is studied in this *** taking entransy dissipation minimization as optimization objective,the optimal external reservoir temperature profiles are derived by using optimal control theory under the condition of a fixed freezing or melting *** entransy dissipation corresponding to the optimal heat exchange strategies of minimum entransy dissipation is 8/9 of that corresponding to constant reservoir temperature operations,which is independent of all system *** obtained results for entransy dissipation minimization are also compared with those obtained for the optimal heat exchange strategies of minimum entropy generation and constant reservoir temperature operations by numerical *** obtained results can provide some theoretical guidelines for the choice of optimal cooling or heating strategy in practical liquid-solid phase change processes.

关键词： liquid-solid phase change process entransy dissipation minimization optimal control finite time thermodynamics generalized thermodynamic optimization

Establishment and evaluation of an improved rat model of open abdomen

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Animal Models and Experimental Medicine 2024年第4期7卷 562-569页

作者： Ye Liu Sicheng Li Jinjian Huang Ze Li Kang Chen Guiwen Qu Xiuwen Wu Jianan Ren school of Medicine Southeast UniversityNanjingChina Research Institute of General Surgery Affiliated Jinling HospitalMedical School of Nanjing UniversityNanjingChina

Introduction:This study aimed to establish an animal model of open abdomen(OA)through temporary abdominal closure via different ***:Adult male Sprague-Dawley rats were randomly divided into three groups:group A(OA with polypropylene mesh alone);group B(OA with polypro-pylene mesh combined with a patch);and group C(OA with polypropylene mesh and a sutured patch).Vital signs,pathophysiological changes,and survival rates were closely monitored in the rats for 7 days after *** X-rays and histopathological examinations were performed to assess abdominal organ changes and wound ***:The results showed no significant difference in mortality rates among the three groups(p>0.05).However,rats in group B exhibited superior overall condi-tion,cleaner wounds,and a higher rate of wound healing compared to the other groups(p<0.05).Abdominal X-rays indicated that varying degrees of distal intestinal obstruction in all *** examinations revealed fibrous hyperpla-sia,inflammatory cell infiltration,neovascularization,and collagen deposition in all *** B demonstrated enhanced granulation tissue generation,neovasculari-zation,and collagen deposition compared to the other groups(p<0.05).Conclusions:Polypropylene mesh combined with patches is the most suitable method for establishing an animal model of *** model successfully replicated the patho-logical and physiological changes in postoperative patients with OA,specifically the progress of abdominal skin wound *** provides a practical and reliable animal model for OA research.

关键词： animal models open abdomen patch polypropylene mesh

Properties and Characteristics of Certain Subclass of Close-to-Convex Harmonic Mappings

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Journal of Mathematical Research with Applications 2024年第5期 648-658页

作者： Jiong SHI Zhigang WANG Xiaoyuan WANG school of Mathematics and Statistics Changsha University of Science and Technology school of Mathematics and Statistics Hunan First Normal University school of Mathematics and Statistics Nanjing University of Science and Technology Graduate school of Information Sciences Tohoku University

In this paper, we study a subclass of close-to-convex harmonic mappings whose analytic parts are starlike mappings. We derive some properties and characteristics for this class, such as the bounds of Toeplitz determin...

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Machine learning and human‐machine trust in healthcare:A systematic survey

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CAAI Transactions on Intelligence Technology 2024年第2期9卷 286-302页

作者： Han Lin Jiatong Han Pingping Wu Jiangyan Wang Juan Tu Hao Tang Liuning Zhu Jiangsu Key Laboratory of Public Project Audit School of Engineering AuditNanjing Audit UniversityNanjingChina school of Information Engineering Nanjing Audit UniversityNanjingChina school of Statistics and Data Science Nanjing Audit UniversityNanjingChina Key Laboratory of Modern Acoustics(MOE) School of PhysicsNanjing UniversityNanjingChina Department of Information Technology and Electrical Engineering ETH ZurichZurichSwitzerland The First Affiliated Hospital with Nanjing Medical University Jiangsu Province HospitalNanjingChina

As human‐machine interaction(HMI)in healthcare continues to evolve,the issue of trust in HMI in healthcare has been raised and *** is critical for the development and safety of healthcare that humans have proper trust in medical *** machines that have applied machine learning(ML)technologies continue to penetrate deeper into the medical environment,which also places higher demands on intelligent *** order to make machines play a role in HMI in healthcare more effectively and make human‐machine cooperation more harmonious,the authors need to build good humanmachine trust(HMT)in *** article provides a systematic overview of the prominent research on ML and HMT in *** addition,this study explores and analyses ML and three important factors that influence HMT in healthcare,and then proposes a HMT model in ***,general trends are summarised and issues to consider addressing in future research on HMT in healthcare are identified.

关键词： human-machine interaction machine learning trust

Multi-Objective Optimization of Aluminum Alloy Electric Bus Frame Connectors for Enhanced Durability

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Computer Modeling in Engineering & Sciences 2024年第7期140卷 735-755页

作者： Wenjun Zhou Mingzhi Yang Qian Peng Yong Peng Kui Wang Qiang Xiao Key Laboratory of Traffic Safety on Track Ministry of EducationSchool of Traffic&Transportation EngineeringCentral South UniversityChangsha410018China school of Mechanical and Automotive Engineering Xiamen University of TechnologyXiamen361024China

The widespread adoption of aluminumalloy electric buses,known for their energy efficiency and eco-friendliness,faces a challenge due to the aluminum frame’s susceptibility to deformation compared to *** issue is further exacerbated by the stringent requirements imposed by the flammability and explosiveness of batteries,necessitating robust frame *** study aims to optimize the connectors of aluminum alloy bus frames,emphasizing durability,energy efficiency,and *** research delves into Multi-Objective Coordinated Optimization(MCO)techniques for lightweight design in aluminum alloy bus body *** goal is to enhance lightweighting,reinforce energy absorption,and improve deformation resistance in connector *** typical aluminum alloy connectors were selected and a design optimization platform was built for their MCO using a variety of software and ***,through three-point bending experiments and finite element analysis on three types of connector components,we identified optimized design parameters based on deformation ***,employing Optimal Latin hypercube design(OLHD),parametric modeling,and neural network approximation,we developed high-precision approximate models for the design parameters of each connector component,targeting energy absorption,mass,and logarithmic ***,utilizing the Archive-based Micro Genetic Algorithm(AMGA),Multi-Objective Particle Swarm Optimization(MOPSO),and Non-dominated SortingGenetic Algorithm(NSGA2),we explored optimized design solutions for these joint ***,we simulated joint assembly buckling during bus rollover crash scenarios to verify and analyze the optimized solutions in three-point bending *** joint component showcased a remarkable 30%–40%mass reduction while boosting energy *** design optimization method exhibits high efficiency and *** contemporary automation technology,the design optimiza

关键词： Aluminum connectors three-point bending simulation parametric design model multi-objective collaborative optimization