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Tungsten 2024年第3期6卷 610-620页

作者： Jia-hao ye Liu-Jie Xu Ji-Kang Hu School of Materials Science and Engineering Henan University of Science and TechnologyLuoyang 471003China National Joint Engineering Research Center for Abrasion Control and Molding of Metal Materials Henan University of Science and TechnologyLuoyang 471003China

In this work,isothermal compression experiments of macroporous W-4.8 vol.%ZrO_(2)(W-4.8ZrO_(2))at 1300-1600℃and strain rate of 0.005-1 s^(-1)were carried out on a Gleeble-1500D thermo-mechanical *** dynamic recovery of W-4.8ZrO_(2)is the main"softening"*** the basis of Arrhenius model,the initial constitutive equation is established by exploring the influence of temperature,strain rate and rheological *** on Arrhenius model,the relationship between flow stress,strain rate and deformation temperature is *** the influence of strain,the improved constitutive equation and the law of material constant changing with the strain are *** that,the hot processing maps were drawn on the basis of the dynamic material model,which is used to analyze the instability mechanism of the W-4.8ZrO_(2),and determine the appropriate hot working process parameters(temperature:1350-1450℃,strain rate:0.1-1 s^(-1)).

关键词： Tungsten alloy Flow characteristics Constitutive equation Hot processing maps

Field Study on Indoor Thermal and Luminous Environment in Winter of Vernacular Houses in Northern Hebei Province of China

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Journal of Harbin Institute of Technology(New Series) 2014年第4期21卷 77-83页

作者： Shi-Meng hao ye-hao Song Jun-Jie Li Ning Zhu School of Architecture Tsinghua University Key Laboratory of Eco Planning & Green Building Ministry of EducationTsinghua University

In this paper,a climate-adaptation study of vernacular houses in northern Hebei Province has been conducted based on quantitative field surveys. Three typical vernacular houses with different kinds of building envelopes were selected. The field surveys included investigation on building material and construction,measurement of indoor thermal environment, infrared thermographic study of building envelopes and measurement of luminous environment. The results showed that the indoor air temperatures were below thermal comfort zone from late night till early morning and the horizontal temperature gradient was obvious. The adobe wall showed better thermal performance than the other two. As for the building layout,it is beneficial to put a storeroom on the north side of the house as a temperature buffer zone. Furthermore,due to missing insulation and the informal process of construction,significant amounts of heat escaped from building envelopes,especially from the corner of wall,ceiling and around the openings. The daylight factors on the work plan in the main rooms were accordance with design standards and the level of illuminance met the requirements of family's daily activities.

关键词： thermal environment luminous environment vernacular houses sever cold zone

Resource Allocation Algorithm Based on PSO-GA for Multi-User OFDM System

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Journal of Electronic Science and Technology 2015年第1期13卷 68-72页

作者： hao-ye Zhang Jin-Ping Mei Shi-Bing Zhang Nantong Branch China Mobile Group Jiangsu Company Limited School of Electronics and Information Nantong University

In order to minimize the transmitted power in the multi-user orthogonal frequency division multiplexing（OFDM） system, a scheme combining the improved particle swarm optimization（POS） algorithm with genetic algorithm（GA） is proposed to optimize the sub-carriers and bits allocation. In the algorithm, a random velocity between the maximum and minimum particle velocity is used as the updating velocity instead of maximum or minimum velocity when the updated particle velocity is higher than the maximum particle velocity or lower than the minimum particle velocity. Then, the convergence population is used as the initial population of the genetic algorithm to optimize the subcarriers and bits allocation further. Simulation results show that the transmitted power of the proposed algorithm is about 2 d B to 10 d B lower than that of the genetic algorithm, particle swarm optimization algorithm, and Zhang＇s algorithm.

关键词： Bit allocation orthogonal frequency division multiplexing particle swarm optimization algorithm with genetic algorithm sub-carri

Comprehensive Model Construction and Simulation for Superconducting Electrodynamic Suspension Train

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Complex System Modeling and Simulation 2023年第3期3卷 220-235页

作者： Linfeng Liu hao ye Wei Dong Junfeng Cui Department of Automation Tsinghua UniversityBeijing 100084China Beijing National Research Center for Information Science and Technology Tsinghua UniversityBeijing 100084China CRSC Research&Design Institute Group Co. LtdBeijing 100070China

With the advantages of levitation/guidance self-stability,large levitation gap,and high lift-to-drag ratios,superconducting electrodynamic suspension(SC-EDS)train is becoming a viable candidate for the high-speed and ultra-high-speed rail *** order to provide the basis for designing the optimization and control strategy,this paper establishes a comprehensive model for the SC-EDS train,which considers the dynamics of the bogie and car body in all *** obtained model reveals the complex coupling and feedback relationships among the variables,which cannot be described by the existing local models of the SC-EDS *** examples under different parameters and initial conditions are presented and discussed to demonstrate the potential use of the model given in this paper.

关键词： superconducting electrodynamic suspension train comprehensive model coupling and feedback analysis numerical simulation

Study of drug function based on similarity of pathway fingerprint

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Protein & Cell 2012年第2期3卷 132-139页

作者： hao ye Kailin Tang Linlin Yang Zhiwei Cao Yixue Li State Key Laboratory of Bioreactor Engineering East China University of Science&TechnologyShanghai 200237China Shanghai Center for Bioinformation Technology Shanghai 200235China School of Life Science and Technology Tongji UniversityShanghai 200092China

Drugs sharing similar therapeutic function may not bind to the same group of ***,their targets may be involved in similar pathway profiles which are associated with certain pathological *** this study,pathway fingerprint was introduced to indicate the profile of significant pathways being influenced by the targets of *** drug−drug network was further constructed based on significant similarity of pathway *** this way,the functions of a drug may be hinted by the enriched therapeutic functions of its neighboring *** the test of 911 FDA approved drugs with more than one known target,471 drugs could be connected into networks.760 significant associations of drug−therapeutic function were generated,among which around 60%of them were supported by scientific literatures or ATC codes of drug functional ***,pathway fingerprints may be useful to further study on the potential function of known drugs,or the unknown function of new drugs.

关键词： pathway fingerprint drug−drug network therapeutic target function prediction

Thermoelectric performance of p-type zone-melted Se-doped Bi_(0.5)Sb_(1.5)Te_3 alloys

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Rare Metals 2018年第4期37卷 308-315页

作者： Ren-Shuang Zhai ye-hao Wu Tie-Jun Zhu Xin-Bing Zhao State Key Laboratory of Silicon Materials School of Materials Science and Engineering Zhejiang University

For zone-melted （ZM） bismuth telluride-based alloys, which are widely commercially available for solidstate cooling and low-temperature power generation around room temperature, introducing point defects is the chief approach to improve their thermoelectric performance. Herein, we report the multiple effects of Se doping on thermoelectric performance of p-type Bi0.5Sb1,5Te3-xSex ＋ 3 wt% Te ZM ingots, which increases carrier concentration, reduces lattice thermal conductivity and deteriorates the carrier mobility. As a result, the peak figure of merit （ZT） is shifted to a higher temperature and a high ZT 1.2 at 350 K is obtained, due to the reduced thermal conductivity and suppressed intrinsic conduction. Further, decreasing Sb content is followed to optimize the room temperature performance and a ZT - 1.1 at 300 K is obtained. These results are significant for designing and optimizing the thermoelectric performance of commercial Bi0.5Sb1.5Te3＋ 3 wt% Te ZM alloys.

关键词： Thermoelectric materials Bismuth telluride Zone melting Se doping Bi0.5Sb1.5Te3

Enhancing room-temperature thermoelectric performance of n-type Bi_(2)Te_(3)-based alloys via sulfur alloying

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Rare Metals 2021年第3期40卷 513-520页

作者： Feng Liu ye-hao Wu Qi Zhang Tie-Jun Zhu Xin-Bing Zhao State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China

Bismuth-telluride-based alloys are the best thermoelectric materials used in commercial solid-state refrigeration near room ***,for n-type polycrystalline alloys,their thermoelectric figure of merit(zT) values at room temperature are often less than1.0,due to the high electron concentration originating from the donor-like effect induced by the mechanical deformation ***,carrier concentration for better performance near room temperature was optimized through manipulating intrinsic point defects by sulfur *** alloying significantly decreases antisite defects concentration and suppresses donor-like effect,resulting in optimized carrier concentration and reduced electronic thermal *** hot deformation process was also applied to improve carrier mobility due to the enhanced *** a result,a high zT value of 1 at 300 K and peak zT value of 1.1 at 350 K were obtained for the twice hot-deformed Bi_(2) Te_(2.7)Se_(0.21)S_(0.09) sample,which verifies sulfur alloying is an effective method to improve thermoelectric performance of n-type polycrystalline Bi2 Te3-based alloys near room temperature.

关键词： Bismuth telluride Thermoelectric Point defect Sulfur alloying Hot deformation

Study on the Optimization for Design of Indoor Natural Ventilation and Lighting Based on Passive Design Measurements

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Journal of Harbin Institute of Technology(New Series) 2014年第4期21卷 24-29页

作者： Jian-Hua Ding ye-hao Song Tian-Yu Xi School of Architecture Tsinghua University key Laboratory of Urban-Rural Eco Planning & Green Building Ministry of Education Tsinghua University School of Architecture Harbin Institute of Technology

Based on the current indoor natural ventilation and lighting in the space of traditional residential buildings,this paper starts from the passive-design optimization of the spatial natural ventilation and lighting,and makes quantitative evaluation on the quality of current interior natural ventilation and lighting for two typical residential buildings by three indexes,including wind speed,static wind area ratio and satisfaction ratio about minimum lighting coefficient. Based on that, this paper conducts the passive design optimization, and establishes the quantitative association and reevaluation among the passive reformation design, natural ventilation,and lighting environmental quality,proposing the general strategy for the existing residential buildings to respond to the passive reformation design of the natural ventilation and lighting. The special reconstruction of core functionary space of integration of "the living room + dining room + partial space"is researched,and the redesign for the optimization and replacement of both indoor and outdoor enclosure parts is explored,which is expected to provide practical exploration on the strategies for passive construction of spatial natural environmental quality within a large number of highly-energy-consumed residential buildings in China,as well as the green design of residential buildings.

关键词： existing residential buildings natural ventilation and lighting green transformation passive design optimization

Carbon storage dynamics of subtropical forests estimated with multi-period forest inventories at a regional scale:the case of Jiangxi forests

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Journal of Forestry Research 2020年第4期31卷 1247-1254页

作者： Qiugen Zhang hao ye Yuan Ding Qun Cao Yangjian Zhang Ke Huang School of Environment and Chemistry Engineering Nanchang HangKong UniversityNanchang 330063People’s Republic of China Institute of Geographical Sciences and Natural Resources Research Beijing 100101People’s Republic of China

Temperate and high-latitude forests are carbon sinks and play pivotal roles in offsetting greenhouse gas emissions of ***,uncertainty still exists for subtropical forests,especially in monsoon-prevalent eastern *** studies have depended on remote sensing,ecosystem modeling,carbon fluxes,or single period forest surveys to estimate carbon sequestration capacities,and the results vary *** study was designed to utilize multi-period forest survey data to explore spatial-dynamics of biomass storage in subtropical forests of *** province,a region with over 60%subtropical forest cover,was selected as the case study site and is located in central east *** on forest inventory data 1984-2013,and the stock-difference and biomass expansion factor methods,the carbon storage and density,of arboreal forests,economic forests,bamboo forests,woodlands and shrubberies were *** results show that carbon storage increased from 159.1 Tg C in 1988 to 276.1 TgC in 2013,making up 3.1-3.8%of carbon stored throughout *** the four types of forests,the amount of carbon stored was as follows:arboreal forest>economic forest>bamboo forest>woodland and *** forests accounted for 64.0-79.4%of the *** carbon density increased from 21.2 Mg C ha-1 in 1984 to26.2 Mg C ha-1 in 2013,equal to 61.2-70.2%of the average carbon density of China’s forests in the same *** carbon storage in Jiangxi will reach 355.5 Tg C and 535.8 Tg C in 2020 and 2030,respectively,and forest carbon density is predicted to be 31.9 Mg C ha-1and 46.4 Mg C ha-1,*** one of the few studies using multi-period data tracking biomass dynamics in Jiangxi province,the findings of this study may be used as a reference for other *** Jiangxi as a case study underlies the fact that subtropical forests in China have great carbon sequestration potential and have fundamental significance to offset global environmental change eff

关键词： Subtropical forests Carbon storage/carbon density Multi-period inventories Prediction Jiangxi Province

Plant Rho GTPase signaling promotes autophagy

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Molecular Plant 2021年第6期14卷 905-920页

作者： Youshun Lin Yonglun Zeng Ying Zhu Jinbo Shen hao ye Liwen Jiang School of Life Sciences Centre for Cell and Developmental Biology and State Key Laboratory of AgrobiotechnologyThe Chinese University of Hong KongShatinNew TerritoriesHong KongChina Institute of Plant Molecular Biology and Agricultural Biotechnology CUHKHong KongChina CUHK Shenzhen Research Institute The Chinese University of Hong KongShatinN.T.ShenzhenHong Kong518057China State Key Laboratory of Subtropical Silviculture Zhejiang A&F UniversityHangzhou 311300China

The roles of Rho family guanosine triphosphatases(GTPases)of plants(ROPs)in modulating plant growth and development have been well ***,little is known about the roles of ROP signaling pathways in regulating plant autophagy and autophagosome *** this study,we identify a unique ROP signaling mechanism,which mediates developmental to autophagic transition under stress conditions in the model plant ***-of-function mutants of ROP8 showed stress-induced hypersensitive phenotypes and compromised autophagic *** to other ROPs in the ROP/RAC family,ROP8 exhibits both plasma membrane and cytosolic punctate localization *** autophagic induction,active ROP8 puncta colocalize with autophagosomal markers and are degraded inside the *** human cells,RalB,an RAS subfamily GTPase,engages its effector Exo84 for autophagosome ***,a RalB counterpart is missing in the plant ***,we discovered that plant ROP8 promotes autophagy via its downstream effector ***-cell super-resolution imaging showed that ROP8 and Sec5 reside on phagophores for autophagosome *** together,our findings highlight a previously unappreciated role of an ROP8-Sec5 signaling axis in autophagy promotion,providing new insights into how plants utilize versatile ROP signaling networks to coordinate developmental and autophagic responses depending on environmental changes.

关键词： Rho of plants(ROP)GTPase ROP signaling networks autophagy signaling exocyst complex