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A UNIFIED ENERGy APPROACH TO A CLASS OF MICROMECHANICS MODELS FOR MICROCRACKED SOLIDS

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Acta Mechanica Solida Sinica 1995年第2期8卷 110-120页

作者： huang, y HWANG, KC UNIV ARIZONA DEPT AEROSP & MECH ENGNTUCSONAZ 85721 TSING HUA UNIV DEPT ENGN MECHBEIJING 100084PEOPLES R CHINA

Micromechanics models have been developed For the determination of the elastic moduli of microcracked solids based on different approaches and interpretations, including the dilute or non-interacting solution, the Mori-Tanaka method, the self-consistent method, and the generalized self-consistent method. It is shown in the present study that all these micromechanics models can be unified within an energy-equivalence framework, and that they differ only in the way in which the microcrack opening and sliding displacements are evaluated. Relevance to the differential methods and the verification of these models are discussed.

关键词： MICROMECHANICS ELASTIC MODULUS MICROCRACKED SOLID ENERGy APPROACH

SIMULATION OF THE THERMODyNAMIC QUANTITIES OF SELF-AVOIDING WALK CHAIN

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Chinese Chemical Letters 1996年第1期7卷 63-66页

作者： Zhao, DL Zhou, XD huang, y ACAD SINICA INST CHEMBEIJING 100080PEOPLES R CHINA BEIJING UNIV DEPT PHYSBEIJING 100871PEOPLES R CHINA

A Monte Carlo method has been proposed for direct simulating the thermodynamic quantities of a single self-avoiding walk chain with the neighbour interaction on a simple cubic lattice. The simulation data of the conformational entropy of the chain length 16 have been found to be consistent very well with the exact results obtained by the direct counting method.

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INFLUENCE OF ALLOyING ELEMENTS ON HyDROGEN DIFFUSION USING SCM-DV-X_α

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Acta Metallurgica Sinica(English Letters) 2004年第1期17卷 71-76页

作者： y.huang D.M.Xing School of Materials Science and Engineering Tianjin University Tianjin 300072 ChinaSchool of Physics Tianjin Normal UniversityTianjin 300071China

The influence of alloy composition (Ti, Mn, TiN) on hydrogen diffusion in Fe was studied in detail using SCM-DV-Xα method. The voltage barriers were obtained via calculation on Fe clusters containing the alloy elements such as Ti, Mn as well as the chemical compound TiN respectively. The results showed that Ti element produced deep trap in Fe, decreasing the diffusion coefficient of hydrogen elements, Mn element did not produce deep trap in Fe, decreasing the diffusion coefficient slightly and TiN in Fe produced very deep "trap" decreasing the diffusion coefficient obviously. The calculation results were in agreement with experiment results.

关键词： hydrogen diffusion SCM-DV-Xα method cluster

Methoprene does not affect juvenile hormone titers in honey bee （Apis mellifera） workers

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Insect Science 2018年第2期25卷 235-240页

作者： Zachary y. huang Stephanie Lin Kiheung Ahn Department of Entomology Michigan State University East Lansing Michigan USA Ecology Evolutionary Biology and Behavior Michigan State University East Lansing Michigan USA BEACON Center for the Study of Evolution in Action Michigan State University East Lansing Michigan USA and 4High School Honors Science Program 2007 Michigan State University East Lansing Michigan USA

Methoprene, a juvenile hormone （JH） analog, is a widely used insecticide that also accelerates behavioral development in honey bees （Apis mellifera）. JH regulates the transition from nursing to foraging in adult worker bees, and treatment with JH or methoprene have both been shown to induce precocious foraging. To determine how methoprene changes honey bee behavior, we compared JH titers ofmethoprene-treated and untreated bees. Behavioral observations confirmed that methoprene treatment significantly increased the number of precocious foragers in 3 out of 4 colonies. In only 1 out of 4 colonies, however, was there a significant difference in JH titers between the methoprene- treated and control bees. Further, in all 4 colonies, there was no significant differences in JH titers between precocious and normal-aged foragers. These results suggest that methoprene did not directly affect the endogenous JH secreted by corpora allata. Because methoprene caused early foraging without changing workers＇ JH titers, we conclude that methoprene most likely acts directly on the JH receptors as a substitute for JH.

关键词： behavioral development juvenile hormone analog juvenile hormone metho-prene precocious foraging

The Role of TNF Related Apoptosis-Inducing Ligand in Neurodegenerative Diseases

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Cellular & Molecular Immunology 2005年第2期2卷 113-122页

作者： y.huang N.Erdmann H.Peng y.Zhao ThelaboratoryofNeurotoxicologyattheCenterforNeurovirology＆NeurodegenerativeDisorders ／／Dept.Pharmacology Dept.ofSurgery UniversityofNebraskaMedicalCenterOmahaNE68198-5880USA／／InstituteofAnimalResearchChineseAcademyofScienceChina

A hallmark of all forms of neurodegenerative diseases is impairment of neuronal functions,and in many cases neuronal cell *** the etiology of neurodegenerative diseases may be distinct,different diseases display a similar pathogenesis,for example abnormal immunity within the central nervous system(CNS),activation of macrophage/microglia and the involvement of proinflammatory *** studies show that neurons in a neurodegenerative state undergo a highly regulated programmed cell death,also called ***-related apoptosis-inducing ligand(TRAIL),a member of the TNF family,has been shown to be involved in apoptosis during many *** one member of a death ligand family,TRAIL was originally thought to target only tumor cells and was not present in ***,recent data showed that TRAIL was unregulated in HIV-1-infected and immune-activated macrophages,a major disease inducing cell during HIV-1-assoeiated dementia(HAD).TRAIL is also induced on neuron by β-amyloid protein,an important pathogen for Alzheimer's *** this review,we summarize the possible common aspects that TRAIL involved those neurodegenerative diseases,TRAIL induced apoptosis signaling in the CNS cells,and specific role of TRAIL in individual *** & Molecular Immunology.2005;2(2):113-122.

关键词： Alzheimer's disease HⅣ-1 associated dementia multiple sclerosis apoptosis TRAIL macrophage

Effect of Organosilicon Coating Containing Light Stabilizer on UV Aging Resistance of Bitumen

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武汉理工大学学报 2010年第17期32卷 83-88页

作者： huang y FENG Z G yU J y Key Laboratory of Silicate Materials Science and Engineering of Education Ministry Wuhan University of TechnologyWuhan 430070China

Effects of organosilicon coating with light stabilizer UV326,UV531 and 770 on ultraviolet (UV) aging resistance of bitumen were investigated by testing the viscosity,softening point and the changes of chemical component before and after UV aging. The results show that UV aging resistance of bitumen is improved due to the good weatherability of organosilicon. And the UV aging resistance of bitumen is further enhanced by adding light stabilizer into organosilicon coating due to the good UV absorption of light stabilizers. Bitumen coated with organosilicon coating containing UV326 exhibits better UV aging resistance in comparison with bitumen coated with organosilicon containing UV531 or 770.

关键词： bitumen light stabilizer organosilicon coating UV aging

PREPARATION AND XRD STUDy OF LITHIUM DEFICIENT LiB COMPOUND

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Acta Metallurgica Sinica(English Letters) 2004年第5期17卷 667-671页

作者： Z.J.Liu B.y.huang Z.y.Li StateKeyLaboratoryforPowderMetallurgy CentralSouthUniversityChangsha410083China

The LiB compounds in lithium deficient state were prepared by three methods and its crystal structure was investigated by using XRD. It is found that the lattice constant c of the compound will increase step by step with decreasing Li content from 0.2796nm of the normal LiB to 0.2886, 0.2981 and 0.3118nm of the lithium deficient LiB. The change of the lattice constant is reversible.

关键词： LiB compound crystal structure electrode materials X-ray diffraction

Genes important for survival or reproduction in Varroa destructor identified by RNAi

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Insect Science 2019年第1期26卷 68-75页

作者： Zachary y.huang Guowu Bian Zhiyong Xi Xianbing Xie Department of Laboratory Animal Science Nanchang UniversityNanchangJiangxiChina Department of Entomology Michigan State UniversityEast LansingMIUSA Department of Microbiology and Molecular Genetics Michigan State UniversityEast LansingMI USA Ecology Evolutionary Biology and BehaviorMichigan State UniversityEast LansingMIUSA BEACON Center for the Study of Evolution in Action Michigan State UniversityEast LansingMIUSA

The Varroa mite,(Varroa destructor),is the worst threat to honey bee health *** explore the possibility of using RNA interference to control this pest, we determined the effects of knocking down various genes on Varroa mite survival and ***-stranded RNA (dsRNA)of six candidate genes (Da,Pros26S,RpL8, RpL11,RpPO and RpS13)were synthesized and each injected into Varroa mites,then mite survival and reproduction were *** of dsRNA for Da (Daughterless)and Pros26S (Gene for proteasome 26S subunit adenosine triphosphatase)caused a significant reduction in mite survival,with 3.57%±1.94% and 30.03%±11.43% mites surviving at 72 h post-inj ection (hpi),*** mites injected with green fluorescent protein (GFP)-dsRNA showed survival rates of 81.95%±5.03% and 82.36 ±2.81%,respectively. Injections of dsRNA for four other genes (RpL8,RpL11,RpPO and RpS13)did not affect survival significantly,enabling us to assess their effect on Varroa mite *** number of female offspring per mite was significantly reduced for mites injected with dsRNA of each of these four genes compared to their GFP-dsRNA *** of the target genes was verified by real-time polymerase chain reaction for two genes important for reproduction (RpL8,RpL11)and one gene important for survival (Pros26S). In conclusion,through RNA interference,we have discovered two genes important for mite survival and four genes important for mite *** genes could be explored as possible targets for the control of Varroa destructor in the future.

关键词： Apis mellijera reproduction RNAi survival Varroa destructor

NUMERICAL SIMULATION OF 3-D CORNER FLOWS IN A CIRCULATING WATER CHANNEL

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Journal of Hydrodynamics 2001年第2期13卷 63-67页

作者： huang, y. Wang, G.Q. Tamashima, M. Shanghai Jiaotong Univ. Shanghai 200030 China

A Navier-Stokes procedure was developed based on a finite volume method to simulate corner flows in circulating water channel (CWC). The standard 2nd-order central scheme together with a deferred correction method was applied for the convective terms. All the other terms were discretized using 2nd order central differencing. The standard k-Ε model was used for the approximation of turbulent flows. First, this method used to calculate the turbulent flows in a 90° bend and the computed results are in good agreements with the experiment. This method was also employed to calculate the flows in a model CWC corner.

关键词： Computational fluid dynamics Computer simulation Finite volume method Laminar flow Navier Stokes equations Three dimensional Turbulent flow