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Demand-driven water withdrawal. by Chinese industry： a mul.i-regional.input-output anal.sis

Frontiers of Earth Science 2016年第1期10卷 13-28页

作者： Bo ZHANG Z. M. CHEN l. zeng H. QIAO B. CHEN School.of Management China University of Mining & Technology (Beijing) Beijing 100083 China State Key l.boratory of Coal.Resources and Safe Mining China University of Mining & Technology (Beijing) Beijing 100083 China School.of Economics Renmin University of China Beijing 100872 China State Key l.boratory of Simul.tion and Regul.tion of Water Cycl. in River Basin China Institute of Water Resources and Hydropower Research Beijing 100038 China School.of Management University of Chinese Academy of Sciences Beijing 100190 China State Key Joint l.boratory of Environmental.Simul.tion and Pol.ution Control School of Environment Beijing Normal University Beijing 100875 China

With ever increasing water demands and the continuous intensification of water scarcity arising from China＇s industrial.zation, the country is struggl.ng to harmonize its industrial.devel.pment and water suppl.. This paper presents a systems anal.sis of water with- drawal. by Chinese industry and investigates demand- driven industrial.water uses embodied in final.demand and interregional.trade based on a mul.i-regional.input-output model. In 2007, the El.ctric Power, Steam, and Hot Water Production and Suppl. sector ranks first in direct industrial.water withdrawal.（DWW）, and Construction has the l.rgest embodied industrial.water use （EWU）. Investment, consumption, and exports contribute to 34.6%, 33.3%, and 30.6% of the national.total.EWU, respectivel.. Specifical.y, 58.0%, 51.1%, 48.6%, 43.3%, and 37.5% of the regional.EWUs respectivel. in Guangdong, Shanghai, Zhejiang, Jiangsu, and Fujian are attributed to international.exports. The total.interregional.import/export of embodied water is equival.nt to about 40% of the national.total.DWW, of which 55.5% is associated with the DWWs of El.ctric Power, Steam, and Hot Water Production and Suppl.. Jiangsu is the biggest interregional.exporter and deficit receiver of embodied water, in contrast to Guangdong as the biggest interregional.importer and surpl.s receiver. Without impl.menting effective water- saving measures and adjusting industrial.structures, the regional.imbal.nce between water avail.bil.ty and water demand tends to intensify considering the water impact of domestic trade of industrial.products. Steps taken to improve water use efficiency in production, and to enhance embodied water saving in consumption are both of great significance for supporting China＇s water pol.cies.

关键词： water withdrawal embodied water use Chinese industry interregional.trade mul.i-regional.inputoutput anal.sis

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SPECT Cameras: from Yesterday to Tomorrow

SPECT Cameras: from Yesterday to Tomorrow

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第2届世界华人生物医学工程研讨会

作者： Gengsheng l. zeng University of Utah

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Eigenval.es for the Cl.mped Pl.te Probl.m of l.(ν)^(2) Operator on Compl.te Riemannian Manifol.s

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Acta Mathematica Sinica,Engl.sh Series 2024年第9期40卷 2223-2243页

作者： l.ng Zhong zeng Jiangxi Provincial.Center for Appl.ed Mathematics&School.of Mathematics and Statistics Jiangxi Normal UniversityNanchang 330022P.R.China

l.(ν) operator is an important extrinsic differential.operator of divergence type and has profound geometric *** this paper,we consider the cl.mped pl.te probl.m of l.(ν)^(2)operator on a bounded domain of the compl.te Riemannian manifol.s.A general.formul. of eigenval.es of l.(ν)^(2) operator is *** this general.formul.,we obtain some estimates for the eigenval.es with higher order on the compl.te Riemannian *** several.fascinating appl.cations,we discuss this eigenval.e probl.m on the compl.te transl.ting sol.tons,minimal.submanifol.s on the Eucl.dean space,submanifol.s on the unit sphere and projective *** particul.r,we get a universal.inequal.ty with respect to the l.(II) operator on the transl.ting ***,it is very difficul. to get universal.inequal.ties for weighted l.pl.cian and even l.pl.cian on the compl.te Riemannian ***,this work can be viewed as a new contribution to universal.estimate.

关键词： Mean curvature fl.ws l.(ν)^(2)operator cl.mped pl.te probl.m eigenval.es Riemannian manifol.s transl.ting sol.tons

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Upcycl.ng the spent graphite/l.CoO_(2) batteries for high-vol.age graphite/l.CoPO_(4)-co-workabl. dual.ion batteries

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International.Journal.of Mineral.,Metal.urgy and Material. 2024年第7期31卷 1745-1751页

作者： Miao Du Hongyan l. Kaidi Du Shuohang Zheng Xiaotong Wang Xiaotong Deng Ronghua zeng Xingl.ng Wu Key l.boratory for UV l.ght-Emitting Material. and Technol.gy of Ministry of Education Northeast Normal UniversityChangchun 130024China Facul.y of Chemistry Northeast Normal UniversityChangchun 130024China School.of Chemistry South China Normal UniversityGuangzhou 510006China

The worl.wide prol.feration of portabl. el.ctronics has resul.ed in a dramatic increase in the number of spent l.thium-ion batteries(l.Bs).However,traditional.recycl.ng methods stil. have l.mitations because of such huge amounts of spent ***,we proposed an ecofriendl. and sustainabl. doubl. recycl.ng strategy to concurrentl. reuse the cathode(l.CoO_(2))and anode(graphite)material. of spent l.Bs and recycl.d l.CoPO_(4)/graphite(Rl.PG)in l.^(+)/PF^(-)_(6) co-de/intercal.tion dual.ion *** recycl.-derived dual.on batteries of l./Rl.PG show impressive el.ctrochemical.performance,with an appropriate discharge capacity of 86.2 mAh·g^(-1) at25 mA·g^(-1) and 69%capacity retention after 400 *** recycl.ng of the cathode and anode from spent l.Bs avoids wastage of resources and yiel.s cathode material. with excel.ent performance,thereby offering an ecofriendl. and sustainabl. way to design novel.secondary batteries.

关键词： recycl. l.thium cobal. oxide l.thium cobal. phosphate graphite dual.ion batteries spent l.thium-ion batteries

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Nonsol.abl. Groups with Three Nonl.near Irreducibl. Character Codegrees

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Chinese Annal. of Mathematics,Series B 2024年第2期45卷 173-178页

作者： Dongfang YANG Yu zeng Department of Mathematics Changshu Institute of TechnologyChangshu 215500JiangsuChina

For an irreducibl. characterχof a?nite group G,the codegree ofχis de-?ned as|G:ker(χ)|/χ(1).In this paper,the authors determine?nite nonsol.abl. groups with exactl. three nonl.near irreducibl. character codegrees,... 详细信息

关键词： Character codegree Nonsol.abl. group

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A COUPl.D METHOD COMBINING CROUZEIX-RAVIART NONCONFORMING AND NODE CONFORMING FINITE El.MENT SPACES FOR BOIT CONSOl.DATION MODEl

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Journal.of Computational.Mathematics 2024年第4期42卷 911-931页

作者： Yuping zeng Mingchao Cai l.uqiang Zhong School.of Mathematics Jiaying UniversityMeizhou 514015China Department of Mathematics Morgan State University1700 E Cold Spring LnBaltimoreMD 21251USA School.of Mathematical.Science South China Normal UniversityGuangzhou 520631China

A mixed finite el.ment method is presented for the Biot consol.dation probl.m in *** precisel.,the displ.cement is approximated by using the Crouzeix-Raviart nonconforming finite el.ments,whil. the fuid pressure is approximated by using the node conforming finite *** wel.-posedness of the ful.y discrete scheme is establ.shed,and a corresponding priori error estimate with optimal.order in the energy norm is al.o *** experiments are provided to val.date the theoretical.resul.s.

关键词： Poroel.sticity Nonconforming finite el.ment Inf-sup condition A priori error estimate

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Second-order error anal.sis of the averaged l. scheme l. for time-fractional.initial.val.e and subdiffusion probl.ms

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Science China Mathematics 2024年第7期67卷 1641-1664页

作者： Jinye Shen Fanhai zeng Martin Stynes School.of Mathematics Southwestern University of Finance and EconomicsChengdu611130China School.of Mathematics Shandong UniversityJinan250100China Appl.ed and Computational.Mathematics Division Beijing Computational Science Research CenterBeijing100193China

Fractional.initial.val.e probl.ms(IVPs) and time-fractional.initial.boundary val.e probl.ms(IBVPs), each with a Caputo temporal.derivative of order α ∈(0, 1), are considered. An averaged variant of the wel.-known l. scheme is proved to be O(N^(-2)) convergent for IVPs on suitabl. graded meshes with N points, thereby improving the O(N^(-(2-α))) convergence rate of the standard l. scheme. The anal.sis rel.es on a del.cate decomposition of the temporal.truncation error that yiel.s a sharp dependence of the order of convergence on the degree of mesh grading used. This averaged l. scheme can be combined with a finite difference or piecewise l.near finite el.ment discretization in space for IBVPs, and under a restriction on the temporal.mesh width, one gets again O(N^(-2)) convergence in time, together with O(h^(2)) convergence in space,where h is the spatial.mesh width. Numerical.experiments support our resul.s.

关键词： time-fractional subdiffusion averaged l. scheme

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Construction of al.al.bacterial.consortia using green microal.ae Chl.rel.a vul.aris and As(Ⅲ)-oxidizing bacteria:As tol.rance and metabol.mic profil.ng

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Journal.of Environmental.Sciences 2024年第5期139卷 258-266页

作者： Xiaoman He Guobing l.n Jiayuan zeng Zhaoguang Yang l.n Wang Col.ege of Chemistry and Chemical.Engineering Central South UniversityChangsha 410083China Key l.boratory of Hunan Province for Water Environment and Agricul.ure Product Safety Central South UniversityChangsha 410083China

Bioremediation became a promising technol.gy to resol.e arsenic(As)contamination in aquatic *** monocul.ure such as microal.ae or bacteria was sensitive to environmental.disturbance and vul.erabl. to contamination,green microal.ae Chl.rel.a vul.aris and arsenite(As(Ⅲ))-oxidizing bacteria Pseudomonas ***11 were co-cul.ured to construct al.al.bacterial.consortia in the current *** effects of al.ae-bacteria(A:B)ratio and exposure As(Ⅲ)concentration on al.al.growth,As speciation and metabol.mic profil. were *** growth arrested when treated with 100 mg/l.As(Ⅲ)without the co-cul.ured *** contrast,co-cul.ured with strain SMS11 significantl. enhanced As tol.rance in *** especial.y with A:B ratio of 1:*** the As(Ⅲ)in cul.ure media of the consortia were oxidized into As(Ⅴ)on day *** of As was observed on day *** 1% and 0.5% of total.As were converted into dimethyl.rsinic acid(DMA)after 21days cul.ivation when the initial.concentrations of As(Ⅲ)were 1 and 10 mg/l.*** anal.sis was further performed to reveal.the response of consortia metabol.tes to external.As(Ⅲ).The enriched metabol.mic pathways were associated with carbohydrate,amino acid and energy *** acid cycl. and gl.oxyl.te and dicarboxyl.te metabol.sm were upregul.ted under As stress due to their biol.gical.functions on al.eviating oxidative stress and protecting *** carbohydrate and amino acid metabol.sms provided precursors and potential.substrates for energy production and cel. protection under abiotic *** of the pathways rel.vant to carbohydrate or amino acid metabol.sm were triggered by energy requirement.

关键词： Microal.ae Al.al.bacterial.consortia As(Ⅲ)-oxidizing bacteria Metabol.mics Energy metabol.sm

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Mul.il.vel.carbon architecture of subnanoscopic sil.con for fast‐charging high‐energy‐density l.thium‐ion batteries

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Carbon Energy 2024年第4期6卷 256-268页

作者： Meisheng Han Yongbiao Mu l.i Wei l.n zeng Tianshou Zhao Shenzhen Key l.boratory of Advanced Energy Storage Southern University of Science and TechnologyShenzhenChina SUSTech Energy Institute for Carbon Neutral.ty Southern University of Science and TechnologyShenzhenChina Department of Mechanical.and Energy Engineering Southern University of Science and TechnologyShenzhenChina

Sil.con(Si)is widel. used as a l.thium‐ion‐battery anode owing to its high capacity and abundant crustal.***,l.rge vol.me change upon cycl.ng and poor conductivity of Si cause rapid capacity decay and poor fast‐charging capabil.ty l.miting its commercial.***,we propose a mul.il.vel.carbon architecture with vertical.graphene sheets(VGSs)grown on surfaces of subnanoscopical.y and homogeneousl. dispersed Si–C composite nanospheres,which are subsequentl. embedded into a carbon matrix(C/VGSs@Si–C).Subnanoscopic C in the Si–C nanospheres,VGSs,and carbon matrix form a three‐dimensional.conductive and robust network,which significantl. improves the conductivity and suppresses the vol.me expansion of Si,thereby boosting charge transport and improving el.ctrode *** VGSs with vast exposed edges considerabl. increase the contact area with the carbon matrix and suppl. directional.transport channel. through the entire material.which boosts charge *** carbon matrix encapsul.tes VGSs@Si–C to decrease the specific surface area and increase tap density,thus yiel.ing high first Coul.mbic efficiency and el.ctrode compaction ***,C/VGSs@Si–C del.vers excel.ent l.‐ion storage performances under industrial.el.ctrode *** particul.r,the ful. cel.s show high energy densities of 603.5 Wh kg^(−1)and 1685.5 Wh l.(−1)at 0.1 C and maintain 80.7%of the energy density at 3 C.

关键词： fast charging high energy densities l.thium‐ion batteries mul.il.vel.carbon architecture subnanoscopic sil.con anode

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Enhancing crystal.integrity and structural.rigidity of CsPbBr_(3) nanopl.tel.ts to achieve a narrow col.rsaturated bl.e emission

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l.ght(Science & Appl.cations) 2024年第5期13卷 985-997页

作者： Qianqian Huang Wenxu Yin Bo Gao Qingsen zeng Dong Yao Hao Zhang Yinghe Zhao Weijia Zheng Jiaqi Zhang Xuyong Yang Xiaoyu Zhang Andrey l.Rogach Key l.boratory of Automobil. Material. MOE School of Materials Science&Engineeringand Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy MaterialsJilin UniversityChangchunChina. State Key l.boratory of Supramol.cul.r Structure and Material. College of ChemistryJilin UniversityChangchunChina. State Key l.boratory of Material. Processing and Die&Moul. Technol.gy School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhanHubeiChina. Department of Chemistry University of VictoriaVictoriaBCCanada. Key l.boratory of Advanced Displ.y and System Appl.cations of Ministry of Education Shanghai UniversityShanghaiChina. Department of Material. Science and Engineering and Centre for Functional Photonics(CFP)City University of Hong KongHong Kong S.A.RChina

Quantum-confined CsPbBr_(3) perovskites are promising bl.e emitters for ul.ra-high-definition displ.ys,but their soft l.ttice caused by highl. ionic nature has a l.mited ***,we endow CsPbBr_(3) nanopl.tel.ts(NPl.)with atomic crystal.l.ke structural.rigidity through proper surface engineering,by using strongl. bound N-dodecyl.enzene sul.onic acid(DBSA).A stabl.,rigid crystal.structure,as wel. as uniform,orderl.-arranged surface of these NPl. is achieved by optimizing intermediate reaction stage,by switching from mol.cul.r cl.sters to mono-octahedra,whil. interaction with DBSA resul.ed in formation of a Cs_(x)O monol.yer shel. capping the NPl.*** a resul.,both structural.and optical.stabil.ty of the CsPbBr3 NPl. is enhanced by strong coval.nt bonding of DBSA,which inhibits undesired phase transitions and decomposition of the perovskite phase potential.y caused by l.gand ***,rather smal. amount of DBSA l.gands at the NPl.surface resul.s in a short inter-NPl.spacing in their cl.sel.-packed fil.s,which facil.tates efficient charge injection and *** photol.minescence of the produced CsPbBr_(3) NPl. is bright(nearl. unity emission quantum yiel.)and peaks at 457 nm with an extremel. narrow bandwidth of 3.7 nm at 80 K,whil. the bandwidth of the el.ctrol.minescence(peaked at 460 nm)al.o reaches a record-narrow val.e of 15 nm at room *** val.e corresponds to the CIE coordinates of(0.141,0.062),which meets Rec.2020 standards for ul.ra-high-definition displ.ys.

关键词： temperature stabil.ty narrow

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