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Building Simulation 2024年第2期17卷 207-221页

作者： xing hu huibo Zhang hui Yu School of Design Shanghai Jiao Tong UniversityShanghai200240China

Wind-driven rain(WDR)has a significant influence on the hygrothermal performance,durability,and energy consumption of building *** calculation of WDR loads using semi-empirical models has been incorporated into the boundary conditions of coupled heat and moisture transfer ***,prior research often relied on fixed WDR absorption ratio,which fail to accurately capture the water absorption characteristics of porous building materials under rainfall ***,this study aims to investigate the coupled heat and moisture transfer of exterior walls under dynamic WDR boundary conditions,utilizing an empirically obtained WDR absorption ratio model based on field *** developed coupled heat and moisture transfer model is validated against the HAMSTAD *** findings reveal that the total WDR flux calculated with the dynamic WDR boundary is lower than that obtained with the fixed WDR boundary,with greater disparities observed in orientations experiencing higher WDR *** variations in moisture flow significantly impact the surface temperature and relative humidity of the walls,influencing the calculation of cooling and heating loads by different *** to the transient heat transfer model,the coupled heat and moisture transfer model incorporating dynamic WDR boundary exhibits maximum increases of 17.6%and 16.2%in cooling and heating loads,*** dynamic WDR boundary conditions provide more precise numerical values for surface moisture flux,offering valuable insights for the thermal design of building enclosures and load calculations for HVAC systems.

关键词： wind-driven rain building component hygrothermal model transient simulation cooling and heating loads

Antitermitic effect of the Lantana camara plant on subterranean termites （Isoptera： Rhinotermitidae）

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Insect Science 2010年第5期17卷 427-433页

作者： Wei Ding xing Ping hu College of Plant Protection Southwest University Chongqing China Department of Entomology and Plant Pathology Auburn University Auburn USA

The insecticidal effects of Lantana camara L. （flowers, leaves, stems and roots） and the soil where lantana had been growing, on foraging activity and survival of the subterranean termites Coptotermes formosanus and Reticulitermes flavipes were examined in a 3-week experiment. The soil in which lantana had been growing had no effect on termite tunneling and survival. Incorporation of chipped fresh lantana leaves and stems into soil had no effect on mortality but caused significant reduction in tunneling. The 5-cm wide barrier of soil with lantana tissue incorporated effectively repelled groups of both species from penetrating the barrier and thus prevented infestation of a piece of wood on the other side of the barrier. C. formosanus was more sensitive in avoiding the barrier than R. flavipes. Leaves, stems and flowers were more repellent than roots. These results provide preliminary evidence that fresh-cut lantana leaves, stems and flowers may have use as additives to garden mulches against termites.

关键词： Coptotermesformosanus Lantana camara L. mulch nonchemical control,repellents Reticulitermesflavipes subterranean termites

Evaluation of differential antitermitic activities of Lantana camara oven-dried tissues against Reticulitermes virginicus （Isoptera： Rhinotermitidae）

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Insect Science 2011年第6期18卷 671-681页

作者： Zhonglin Yuan xing Ping hu Qingdao Agricultural University Qingdao Shandong Province China Department of Entomology and Plant Pathology Auburn University Auburn Alabama USA

Chemical-treated soil or physical barriers have been the most commonly used approach for termite management. We hypothesized that a barrier of soil incorporated with oven-dried Lantana camara L. tissues could prevent termite infestation. We first examined the antitermitic effects of the dried tissues from two cultivars （＇Mozelle＇ and ＇New Gold＇） on the subterranean termite, Reticulitermes virginicus （Banks）（Isoptera： Rhinotermitidae）. Results show that all of the tissues of Mozelle had greater antitermic activity than corresponding tissues of New Gold, and leaves had greater termiticidal effects than flowers and stems. When termites were exposed to the test materials in a no-choice bioassay, the 24-day test resulted in a significant reduction of survival （52.5%-88.6%）, running speed （18.2%-37.3%）, live weight （21.8%-53.5%） and body water content （33.2%-56.2%） compared to the control. The consumption of leaves and flowers was exiguous. When used as 25% tissue mulch-barrier, the oven-dried lantana tissues decreased termite tunneling and wood consumption and increased termite mortality. The decreased survival, vigor, and low consumption indicate a toxic and anti-feeding property of the materials tested. The results therefore support our hypothesis that the dried lantana tissues possess antitermitic activities.

关键词： antitermitic activity mulch barrier bioassay no-choice bioassay organictermite control oven-dried plant tissues subterranean termite termiticidal toxicity

Microstructure and Thermoelectric Properties of Bi- and Cu-Substituted Ca_3Co_4O_9 Oxides

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Journal of Materials Science & Technology 2009年第1期25卷 105-108页

作者： Haoshan Hao Limin Zhao xing hu Department of Mathematical and Physical Sciences Henan Institute of Engineering Zhengzhou 451191 China School of Physical Engineering and Material Physics Laboratory Zhengzhou University Zhengzhou 450052 China

Bi- and Cu-substituted Ca3Co4O9 samples were prepared by conventional solid-state reaction method and the effect of element substitution on the microstructures and thermoelectric properties was investigated. Partial substitution of Cu for Co leads to an increase in electrical conductivity and a decrease in Seebeck coefficient due to the rise of hole concentration. The microstructure of Cu-substituted sample is almost unchanged compared with undoped Ca3Co4O9. On the other hand, partial substitution of Bi for Ca gives rise to a significant increase in the grain size, and c-axis-oriented structure can be formed in Ca2.7Bi0.3Co4O9, resulting in an obvious increase in electrical conductivity. Cu and Bi co-substitution further increases the grain growth and the electrical conductivity of Ca2.7Bi0.3Co3.7Cu0.3O9. Thus, Cu and Bi co-substitution samples possess the optimal thermoelectric performance at high temperature and the highest value of power factor can reach 3.1×10^-4 Wm^-1.K^-2 at 1000 K.

关键词： Ca3Co4O9 Element substitution Microstructure Thermoelectric properties

Control of water contamination on side window of road vehicles by A-pillar section parameter optimization

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Journal of Hydrodynamics 2020年第6期32卷 1138-1150页

作者： Li Xin xing-jun hu Jing-yu Wang State Key Laboratory of Automotive Simulation and Control Jilin UniversityChangchun130025China

The water contamination on the side windows of moving vehicles is a crucial issue in improving the driving safety and the *** this paper,an effective optimization method is proposed to reduce the water contamination on the side windows of *** accuracy and the efficiency of the numerical simulation are improved by using the lattice Boltzmann method,and the Lagrangian particle tracking *** parameters are constructed on the basis of the occurrence of the water deposition on a vehicle’s side *** water contamination area of the side window and the aerodynamic drag are considered simultaneously in the design process;these two factors are used to form the multi-objective optimization function in the genetic algorithm(GA)*** approximate model,the boundary-seeded domain method,and the GA method are combined in this study to enhance the optimization *** optimization,the optimal parameters for the A-pillar section are determined by setting the boundary to an area of W=7.77 mm,L=1.27 mm and H=11.22 *** side window’s soiling area in the optimized model is reduced by 66.93%,and the aerodynamic drag is increased by 0.41%only,as compared with the original *** is shown that the optimization method can effectively solve the water contamination problem of side windows.

关键词： Water contamination aerodynamic drag A-pillar section parameters multi-objective optimization approximate model genetic algorithm

Heat Transfer Characteristic of Molten Pool for Twin-Roll Strip Casting

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Journal of Iron and Steel Research International 2004年第6期11卷 14-19页

作者： xing Chang-hu ZHAI Qi-jie Shanghai University

Body-fitted coordinate transformation equation was deduced and used to generate the body-fitted grids of molten pool for twin-roll strip *** orthogonality of the grids on the boundary was modified by adjusting source *** energy equation and the boundary conditions were transformed from physical space to computational *** velocity field model proposed by Hirohiko Takuda was used to calculate the temperature field of molten steel,and the influence of technical factors was also discussed.

关键词： body-fitted coordinate twin-roll strip casting heat transfer molten pool temperature field

First principle study on the possibilities of magnetism in one-dimensional In and Tl atomic wires with the full-potential linearized augmented plane wave method

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Acta Metallurgica Sinica(English Letters) 2009年第2期22卷 117-122页

作者： Zhili Zhu Jinhua GU Yu JIA xing hu School of Physical Engineering and Material Physics Laboratory Zheng Zhou University Zhengzhou 450052 China

Using ab initio total energy calculations with the full-potential linearized augmented plane wave method, the possibilities of magnetism in one-dimensional In and Tl wires were explored and their properties as the function of geometric structures were studied. The results suggest that the linear In and Tl wires show magnetization at the equilibrium bond distance with magnetic moments of 0.71 and 0.67 μB/atom, respectively. Allowing ions to relax, the wires were deformed as zigzag structures, but no dimerization occurs. The zigzag wires also exhibit spontaneous magnetization, although the magnetic moments are lower than those of straight wires.

关键词： Magnetism Atomic wire First-principle-study

Design of a hybrid magnetomotive force electromechanical valve actuator

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Frontiers of Information Technology & Electronic Engineering 2017年第10期18卷 1635-1643页

作者： Jawad ASLAM xing-hu LI Faira Kanwal JANJUA School of Transportation Science and Engineering Beihang University Beijing 100191 China School of Mechanical and Manufacturing Engineering National University of Science and Technology lslamabad 46000 Pakistan School of Natural Sciences University of Engineering and Technology Lahore 54000 Pakistan

We propose a novel axis-symmetric modified hybrid permanent magnet(PM)/electromagnet(EM) magnetomotive force actuator for a variable valve timing camless engine. The design provides a large magnetic force with low energy consumption, low coil inductance, PM demagnetization isolation, and improved transient response. Simulation and experimental results confirm forces of about 200 N(in the presence of coil current) at the equilibrium position and 500 N(in the absence of coil current) at the armature seat. We compared our proposed design with a double solenoid valve actuator(DSVA). The finite element method(FEM) designs of the DSVA and our proposed valve actuator were validated by experiments performed on manufactured prototypes.

关键词： Permanent magnet Electromagnet Variable valve timing Camless engine Magnetomotive force

From atom to monatomic wire:an ab initio study of magnetism in 3d transition metals

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Acta Metallurgica Sinica(English Letters) 2010年第3期23卷 191-196页

作者： Zhili Zhu Jinhua GU Yu JIA xing hu School of Physical Engineering and Material Physics Laboratory Zheng Zhou University Zhengzhou 450052 China

A systematic ab initio study on magnetism of the 3d transition metals（TM） from atom to monoatomic wire within density functional theory with generalized gradient approximation（GGA） was *** results show that the spin coupling has strong intraatomic exchange strengths about 1 eV for isolated 3d TM *** magnetic moments are distinctly lower than those of free atoms for all dimers except Mn 2 .All the 3d TM elements exhibit magnetic ground states in the linear wire structure.

关键词： Ab initio study Magnetism Transition metals

Influence of injection of Chinese botulinum toxin type A on the histomorphology and myosin heavy chain composition of rat gastrocnemius muscles

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2013年第11期14卷 983-992页

作者： Bin HONG Min CHEN xing-yue hu Department of Neurology Sir Run Run Shaw HospitalSchool of MedicineZhejiang University Department of Endocrinology the First Affiliated HospitalSchool of MedicineZhejiang University

Background and objective:Botulinum toxin type A(BoNT/A)is a metalloprotease that blocks synaptic transmission via the cleavage of a synaptosomal-associated protein of 25 kDa(SNAP-25).It has gained widespread use as a treatment for cerebral palsy and skeletal muscle *** China,Chinese botulinum toxin type A(CBTX-A),a type of BoNT/A,is in widespread clinical ***,the changes in the morphological and biochemical properties of treated muscles and in remote muscles from the CBTX-A injection site are relatively ***,we investigated the changes in histomorphology and myosin heavy chain(MyHC)isoform composition and distribution in rat gastrocnemius muscles after intramuscular injection of ***:The weakness of the injected muscles was assessed periodically to identify their functional *** slices were stained with hematoxylin-eosin(HE)and adenosine triphosphatase(ATPase).MyHC isoform composition was analyzed by sodium dodecyl sulfatepolyacrylamide gel electrophoresis(SDS-PAGE)to uncover changes in morphological and biochemical ***:Our findings demonstrate that following injection of CBTX-A 5 U into rat gastrocnemius muscles,shifts in MyHC isoform composition emerged on the third day after injection and peaked in the fourth *** composition remained distinctly different from that of the control group after the twelfth *** specifically,there was a decrease in the proportion of the type IIb isoform and an increase in the proportions of type IIx,type IIa,and type I ***:Data revealed that CBTX-A led to a shift in MyHC composition towards slower isoforms and that the MyHC composition remained far from normal six months after a single ***,no noticeable remote muscle weakness was induced.

关键词： Botulinum toxin type A(BoNT/A) Myosin heavy chain Chemodenervation Remote effect