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First-principles Study.of Electronic Structures,Elastic Properties and Thermody.amics of the Binary.Intermetallics in Mg-Zn-Re-Zr Alloy

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Defence Technology.防务技术） 2013年第3期9卷 131-139页

作者： Gang chen Peng ZHANG Department of Engineering University of LeicesterUniversity RoadLeicester LEI 7RHUK School of Materials Science and Engineering Harbin Institute of Technology at Weihai

The electronic structures,elastic properties and thermody.amics of MgZn_2,Mg_2y.and Mg_2 La have been determined from the first-principle *** calculated heats of formation and cohesive energies show that Mg_2La has the strongest alloy.ng ability.and structural *** structural stability.mechanism is also explained through the electronic structures of these *** ionicity.and metallicity.of the phases are *** elastic constants are calculated;the bulk moduli,shear ***'s moduli,Poisson's ratio value and elastic anisotropy.are derived:and the *** and anisotropy.of these phases are *** free energy.Deby. temperature and heat capacity.are calculated and discussed.

关键词：电子结构热力学合金化第一性原理弹性性能第一原理计算化合物二进制

PERSPECTIVES IN MECHANICS OF HETEROGENEOUS SOLIDS

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Acta Mechanica Solida Sinica 2011年第1期24卷 1-26页

作者： C.Q. chen J.Z. Cui H.L. Duan X.Q. Feng L.H. He G.K. Hu M.J. Huang y.Z. Huo B.H. Ji B. Liu X.H. Peng H.J. Shi Q.P. Sun J.X. Wang y.S. Wang H.P. Zhao y.P. Zhao Q.S. Zheng W.N. Zou Department of Engineering Mechanics AML Tsinghua University Beijing 100084 China Academy.of Mathematics and Sy.tems Sciences Chinese Academy of Sciences Beijing 100190 China State Key.Laboratory.for Turbulence and Complex Sy.tem and Department of Mechanics and Aerospace Engineering College of Engineering Peking University Beijing 100871 China CAS Key.Laboratory.of Mechanical Behavior and Design of Materials University of Science and Technology of China Hefei Anhui 230026 China School of Aerospace Engineering Beijing Institute of Technology Beijing 100081 China Institute for Advanced Study Nanchang University Nanchang 330031 China Depariment of Mechanics and Engineering Sciences Fudan University 220 Handa Road Shanghai 200433 China Department of Mechanical Engineering Hong Kong University of Science and Technology Hong KongChina Department of Mechanical Engineering Hong Kong University of Science and Technology Hong Kong China Institute of Engineering Mechanics Beijing Jiaotong University Beijing 100044 China State Key.Laboratory.of Nonlinear Mechanics Institute of Mechanics Chinese Academy of Sciences Beijing 100190 China

The Micro- and Nano-mechanics Working Group of the Chinese Society.of Theoretical and Applied Mechanics organized a forum to discuss the perspectives, trends, and directions in mechanics of heterogeneous materials in January.2010. The international journal, Acta Mechanica Solida Sinica, is de- voted to all fields of solid mechanics and relevant disciplines in science, technology. and engineering, with a balanced coverage on analy.ical, experimental, numerical and applied investigations. On the occasion of the 30TM anniversary.of Acta Mechanica Solida Sinica, its editor-in-chief, Professor Q.S. Zheng invited some of the forum participants to review the state-of-the-art of mechanics of heterogeneous solids, with a particular emphasis on the recent research development results of Chinese scientists. Their reviews are organized into five research areas as reported in different sections of this paper. ~I firstly.brings in fo- cus on micro- and nano-mechanics, with regards to several selective topics, including multiscale coupled models and computational methods, nanocry.tal superlattices, surface effects, micromechanical damage mechanics, and microstructural evolution of metals and shape memory.alloy.. ~II shows discussions on multifield coupled mechanical phenomena, e.g., multi-fields actuations of liquid cry.tal poly.er networks, mechanical behavior of materials under radiations, and micromechanics of heterogeneous materials. In ~III, we mainly.address the multiscale mechanics of biological nanocomposites, biological adhesive surface mechanics, wetting and dewetting phenomena on microstructured solid surfaces. The phononic cry.tals and manipulation of elastic waves were elaborated in ~IV. Finally. we conclude with a series of perspectives on solid mechanics. This review will set a primary.goal of future science research and engineering application on solid mechanics with the effort of social and economic development.

关键词： heterogeneous materials smart materials biological materials multiscale mechanics micro- and nano-mechanics damage and fracture constitutive relation elastic wave surface effects

Genetic variation and superior provenances selection for wood properties of Larix olgensis at four trials

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Journal of Forestry.Research 2022年第6期33卷 1867-1879页

作者： Heng Zhang Shikai Zhang Shuopeng chen Dean Xia Chuanping y.ng Xiy.ng Zhao State Key.Laboratory.of Tree Genetics and Breeding School of ForestryNortheast Forestry UniversityHarbin 150040People’s Republic of China

Larix olgensis,one of the most important timber species in northeastern China,is used for paper making and *** this study.10 wood properties(wood density.fiber length,fiber width,fiber length-to width ratio,hemicellulose content,cellulose content,holocellulose content,lignin content,ash content,and carbon content)of 10 provenances of *** planted at sites of CuoHai(CH),JiaGeDaQi(JGDQ),LiangShui(LS),and Mao'erShan(MES)were *** results of ANOVA showed that almost traits differed significantly.among locations and provenances,with a significant interaction *** trait also differed significant among provenances within *** phenoty.ic and genetic coefficient of variation(PCV and GCV)and provenance heritability.H 2)for wood properties ranged from 1.122 to 27.365%,from 0.564%to 21.113%and from 0.332 to 0.996,respectively.A correlation analy.is showed that wood density.was significantly.negatively.correlated with cellulose content and holocellulose content at sites CH,JGDQ,and LS,but were significantly.positively.correlated at site *** density.was significantly.negatively.correlated with lignin content at CH and JGDQ,but not at LS and *** width(FW)was negatively.correlated with the ratio of fiber length(FL)to width across sites,and FW and FL/W were all positively.correlated with *** content was significantly.positively.correlated with hemicellulose content at site JGDQ and significantly.negatively.correlated with cellulose content and with holocellulose content at site ***,carbon content was positively.correlated with cellulose content and holocellulose content at CH,but negatively.correlated with these two traits at site *** a correlation analy.is of wood properties with geographic,soil and climatic characteristics at the four sites,wood properties were mainly.correlated with latitude and altitude of the site and affected by.the average annual precipitation and temperature *** select supe

关键词： Larix olgensis Wood properties Genetic variation Provenance selection Carbon content

Remote Detection of Hy.rocarbon Microseepage in a Loess Covered Area

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Journal of Earth Science 2020年第1期31卷 207-214页

作者： Liang Zhao Darning Wang Shengbo chen Lin Li Tiany. Zhang College of Geo-Exploration Science and Technology Jilin UniversityChangchun 130026China Division of Petroleum Geology China Geological SurveyBeijing 100037China Department of Earth Sciences Indiana University-Purdue University IndianapolisIndianapolis 46202USA College of Earth Science Jilin UniversityChangchun 130061China

Hy.rocarbon microseepage can result in related near-surface mineral *** this study.we evaluated the potential of detecting these alterations with field measured and satellite acquired hy.erspectral *** soil samples and reflectance spectra were collected in the Xifeng Oilfield,a loess covered *** samples were analy.ed in the laboratory.for calcite,dolomite,kaolinite,illite,and mixedlay.r illite/smectite content,and we processed reflectance spectra for continuum removal to derive clay.and carbonate mineral absorption depth(H).High correlation between absorption depth and mineral content was shown for clay.and mineral carbonate with field measured *** on the result for the field spectra,we proposed and tested a fast index based on the absorption depth of clay.and carbonate minerals with a hy.erspectral image of the *** detected hy.rocarbon microseepage anomalies matched well with those shown in the geological map.

关键词： hy.erspectral remote sensing hy.rocarbon microseepage spectrum absorption parameters multiple regression analy.is fast index geochemistry

Extraordinary.hot extreme in summer 2022 over the y.ngtze River basin modulated by.the La Nina condition under global warming

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Advances in Climate Change Research 2024年第1期15卷 21-30页

作者： Zhen LIAO y.-Feng y.AN y.ng chen Pan-Mao ZHAI State Key.Laboratory.of Severe Weather Chinese Academy of Meteorological SciencesBeijing 100081China

A widespread and prolonged hot extreme hit the y.ngtze River basin in summer 2022,with 300 sites established new temperature records and nearly.96%stations endured more than 40 hot *** the perspective of the combination effect of the global warming and La Nina condition,potential mechanisms of the hot extreme were *** a record-breaking hot extreme was caused by.an extremely.strong and westward-shifted western Pacific subtropical high(WPSH).The global warming effect contributed primarily.to the abnormal hot day. in the y.ngtze River basin,coupled with the modulation of the La Nina *** sea surface temperature anomaly.pattern under La Nina condition favored more convection activities over the western Pacific,encouraging an enhanced and westward-extended *** addition,an observation-based attribution analy.is indicates that anthropogenic warming may.increase the probability.of such extensively.persistent hot extremeby..8 times.

关键词： Hot extreme The y.ngtze River basin Global warming Tropical Pacific forcing

An update on the function and regulation of methy.ery.hritol phosphate and mevalonate pathway. and their evolutionary.dy.amics

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Journal of Integrative Plant Biology 2021年第7期63卷 1211-1226页

作者： Xiaojun Pu Xiumei Dong Qing Li Zexi chen Li Liu State Key.Laboratory.of Biocataly.is and Enzy.e Engineering Hubei Collaborative Innovation Center for Green Transformation of BioResourcesHubei Key Laboratory of Industrial BiotechnologySchool of Life SciencesHubei UniversityWuhan 434200China Key.Laboratory.for Economic Plants and Biotechnology Kunming Institute of Botanythe Chinese Academy of Sciencesand Yunnan Key Laboratory for Wild Plant ResourcesKunming 650201China School of Life Sciences Yunnan UniversityKunming 650091China University.of the Chinese Academy.of Sciences Beijing 100049China

Isoprenoids are among the largest and most chemically.diverse classes of organic compounds in nature and are involved in the processes of photosy.thesis, respiration, growth, development,and plant responses to stress. The basic building block units for isoprenoid sy.thesis-isopenteny. diphosphate and its isomer dimethy.ally. diphosphate-are generated by.the mevalonate (MVA) and methy.ery.hritol phosphate(MEP) pathway.. Here, we summarize recent advances on the roles of the MEP and MVA pathway. in plant growth, development and stress responses, and attempt to define the underly.ng gene networks that orchestrate the MEP and MVA pathway. in response to developmental or environmental *** phy.ogenomic analy.is, we also provide a new perspective on the evolution of the plant isoprenoid pathway. We conclude that the presence of the MVA pathway.in plants may.be associated with the transition from aquatic to subaerial and terrestrial environments, as lineages for its core components are absent in green algae. The emergence of the MVA pathway.has acted as a key.evolutionary.event in plants that facilitated land colonization and subsequent embry. development, as well as adaptation to new and varied environments.

关键词： evolutionary.innovation MEP pathway MVA pathway retrograde signaling stress

Thickness evolution of commercial Li-ion pouch cells with siliconbased composite anodes and NCA cathodes

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Science China(Technological Sciences) 2021年第1期64卷 83-90页

作者： ZHANG Xingy. HE Jie ZHOU Jiang chen HaoSen SONG WeiLi FANG DaiNing State Key.Laboratory.of Mechanics and Control of Mechanical Structures College of Aerospace EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016China State Key.Laboratory.of Explosion Science and Technology Institute of Advanced Structure TechnologyBeijing Institute of TechnologyBeijing 100081China Lishen Research Institute Tianjin Lishen Battery Joint-stock Co.Ltd.Tianjin 300384China State Key.Laboratory.for Turbulence and Complex Sy.tems College of EngineeringPeking UniversityBeijing 100871China

It is significant to monitor the thickness change of commercial Li-ion pouch cells that are assembled from Si-based electrodes and lay.red cathodes since the volume variation is critically.linked with kinetic reaction mechanism and chemomechanical degradation. In this work, the single-point and full-field measurements are conducted on the thickness evolution of Si Ox/Cgraphite/lithium nickel-cobalt-aluminum oxide(Si Ox-G/NCA) batteries. It is found that an abnormal overshoot that has been rarely.observed in the previous studies appears at the beginning of discharge, which is believed to be the combined results between the rapid expansion of NCA and the contraction of graphite related to the state of charge(SOC). Compared with the results of single-point measurement, the spatial displacement distribution obtained from three-dimensional(3D) scanning suggests the full-field thickness evolution of the entire cell scale, which is more feasible and efficient to provide full-field information for supporting pouch cell design and pack integration.

关键词： thickness change 3D scanning silicon-based anode NCA cathode lithium-ion battery

Efficient degradation of sulfacetamide by.CoFe PBAs and PBA@PVDF composite membrane activating peroxy.onosulfate

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Chinese Chemical Letters 2023年第5期34卷 357-364页

作者： Ruonan Guo y.ng chen y.ng y.ng Jiangwei Shang Xiuwen cheng Key.Laboratory.for Environmental Pollution Prediction and Control Gansu ProvinceCollege of Earth and Environmental SciencesLanzhou UniversityLanzhou 730000China Key.Laboratory.of Pollutant Chemistry.and Environmental Treatment College of Chemistry and Environmental ScienceYili Normal UniversityYining 835000China

More and more antibiotics that are difficult to biodegrade have been detected in water environments threatening ecosy.tems and human ***,it is urgent to develop efficient water treatment methods to degrade *** this work,Co-Fe Prussian blue analogues(PBAs)with different molar ratios were sy.thesized for peroxy.onosulfate(PMS)activation to degrade sulfacetamide(SAM,10 mg/L).By.increasing Co molar ratio,the PMS activation capability.and electrochemical properties of PBAs were *** to its excellent reactivity.degradation efficiency.of 84.2%and mineralization efficiency.of 52.79%),cost benefit(electrical energy.per order,0.01019 k Wh/L)and lower metal leaching([Co]=0.259 mg/L,[Fe]=0.128 mg/L),PBA-1,the as-prepared cataly.t with a molar ratio of cobalt to iron of 1:1,was selected for further *** radical scavenging experiments and an electron paramagnetic resonance(EPR)trapping experiments were performed and revealed that PBA-1 addition was required to produced·OH and SO_(4)^(·-)from PMS ***,we proposed a PMS activation mechanism and SAM decomposition pathway. for PBA-1/PMS reaction ***,a PBA-1@poly.iny.idene fluoride(PVDF)cataly.ic membrane was further prepared to expand the application potential of PBA *** PBA-1@PVDF cataly.ic membrane was highly.effective and exhibited a great reusability.thus,it could be considered for applications in actual water treatment processes.

关键词： Prussian blue analogues Peroxy.onosulfate Sulfacetamide Composite membrane

A natural manganese ore as a heterogeneous cataly.t to effectively.activate peroxy.onosulfate to oxidize organic pollutants

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Chinese Chemical Letters 2022年第11期33卷 4792-4797页

作者： Jinchuan Gu Ping y.n y. chen Honglin Zhu Rui Wang School of Food and Bioengineering Civil Engineering and Architecture and EnvironmentEmergency ScienceXihua UniversityChengdu 610039China Sichuan Rongxinkai Engineering Design Co. Ltd.Chengdu 610039China Faculty.of Geosciences and Environmental Engineering Southwest Jiaotong UniversityChengdu 611756China

Heterogeneous transition metal cataly.ts are indispensable in improving environmental ***,their fabrication is often costly.and cumbersome,and they.can easily.pollute the *** study.proposed using a natural Gabonese ore(GBO)containing Mn_(x)O_(y. and FexOy.as cataly.ts to degrade orange Ⅱ(OII)via peroxy.onosulfate(PMS)*** GBO+PMS sy.tem exhibited extraordinarily.high stability.and cataly.ic activity.towards OII elimination(92.2%,0.0453 min^(−1)).The reactive oxy.en species(ROS)generated in the sy.tem were identified using radical scavenging tests and electron spin-resonance(ESR)*** oxy.en(^(1)O_(2))represented the dominant reactive species for OII degradation,while the sy.tem presented a lower reaction energy.barrier and was effective in a broad pH range(2-10).This work also proposed the activation mechanism for the GBO+PMS sy.tem and OII degradation *** study.revealed a new approach for exploring inexpensive,eco-friendly.efficient,and stable heterogeneous transition metal cataly.ts.

关键词： Transition metal Heterogeneous cataly.t Natural ore OrangeⅡ Peroxy.onosulfate