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Tempor.l Var.ations in Soil CO_2 Efflux Under.Difer.nt Land Use Types in the Black Soil Zone of Nor.heast China

Pedospher. 2013年第5期23卷 636-650页

作者： HAN Xiao-Zeng LI Hai-bo W. r. HOr.ATH National Field r.sear.h Station of Agr.-Ecosystem in Hailun Northeast Institute of Geography and Agro-ecology Chinese Academy of Sciences College of Plant Sciences Jilin University of Agricultural Science and Technology Depar.ment of Land Air and Water Resources University of California

The quantification of soil CO2 effiux is cr.cial for.better.under.tanding the inter.ctions between dr.ving var.ables and C losses fr.m black soils in Nor.heast China and for.assessing the function of black soil as a net sour.e or.sink of atmospher.c CO2 depending upon land use. This study investigated r.sponses of soil CO2 effiux var.ability to soil temper.tur. inter.ctions with differ.nt soil moistur. levels under.var.ous land use types including gr.ssland, bar. land, and ar.ble （maize, soybean, and wheat） land in the black soil zone of Nor.heast China. The soil CO2 effiuxes with and without live r.ots, defined as the total CO2 efftux （FtS） and the r.ot-fr.e CO2 ei^lux （Fr.S）, r.spectively, wer. measur.d fr.m Apr.l 2009 to May 2010 using a static closed chamber.technique with gas chr.matogr.phy. The seasonal soil CO2 fluxes tended to incr.ase fr.m the beginning of the measur.ments until they peaked in summer.and then declined after.ar.s. The mean seasonal FtS r.nged fr.m 20.3=h7.8 to 58.1~21.3 mg CO2-C m-2 h-1 for.all land use types and decr.ased in the or.er.of soybean land ~ gr.ssland 〉 maize land ~ wheat land ） bar. land, while the cor.esponding values of Fr.S wer. r.latively lower. r.nging fr.m 20.3~7.8 to 42.3~21.3 mg CO2-C m-2 h-1. The annual cumulative FtS was in the r.nge of 107-315 g CO2-C m-2 acr.ss all land uses types. The seasonM CO2 effiuxes wer. significantly （P 〈： 0.001） sensitive to soil temper.tur. at 10 cm depth and wer. r.sponsible for.up to 62% of the CO2 effiux var.ability. Cor.espondingly, the temper.tur. coefficient Q10 values var.ed fr.m 2.1 to 4.5 for.the seasonal FtS and 2.2 to 3.9 for.the Fr.S dur.ng the gr.wing season. Soil temper.tur. inter.cting with soil moistur. accounted for.a significant fr.ction of the CO2 flux var.ability for.FtS （up to 61%） and Fr.S （up to 67%） via a well-defined multiple r.gr.ssion model, indicating that temper.tur. sensitivity of C02 flux can be mediated by water.availability, especially under.water.str.ss.

关键词： inter.ction r.ot soil moistur. temper.tur. sensitivity water.str.ss

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High sensitivity dual polar.zation four.channels sur.ace plasmon r.sonance r.fr.ctive index sensor.with wide detection r.nge and high linear.ty based on photonic cr.stal fiber

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Optoelectr.nics Letter. 2025年

作者： CUI Nan PAN Honggang ZHANG Ailing ZHAO Zihong CHEN Zhipan ZHANG bo Tianjin Key Labor.tor. of Film Electr.nic and Communication Devices， Engineer.ng r.sear.h Center.of Optoelectr.nic Devices and Communication Technology， Ministr. of Education， School of Integr.ted Cir.uit Science and Engineer.ng， Tianjin Univer.ity of Technology

In this paper. we pr.pose and numer.cally char.cter.ze the optical char.cter.stics of a high sensitivity dual polar.zation four.channels sur.ace plasmon r.sonance r.fr.ctive index sensor.with wide detection r.nge and high linear.ty based on photonic cr.stal fiber.（PCF）. Four.light tr.nsmission channels ar. constr.cted by using big air.holes. The small r.ctangular.air.hole in the center.of the fiber.cor. is used to add asymmetr.. We use gold plasma mater.al to achieve better.sensing per.or.ance. A thin film of TiO2is placed on the PCF sur.ace， which assists gold in the adhesion on PCF. The maximum wavelength sensitivity of the sensor.can r.ach 20000 nm/r.U in both x and y polar.zation modes. While the maximum wavelength r.solution of the sensor.is 5×10-6r.U. The aver.ge wavelength sensitivity r.ached 15900nm/r.U and 15800nm/r.U in x and y polar.zation mode. The sensor.featur.s r.=0.9969 / r.=0.9966 high linear.per.or.ance in x and y polar.zation mode and the maximum FOM values 509.13 r.U-1/ 489.63 r.U-1in x and y polar.zation mode. Besides the sensor.s detection r.nge is 1.26-1.36， which is a wide r.fr.ctive index detection r.nge. The sensor.has a wide r.nge of applications in biomedical and other.fields.

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Numer.cal and exper.mental analysis of the closed-cell aluminium foam under.low velocity impact using computer.zed tomogr.phy technique

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Acta Mechanica Sinica 2019年第1期35卷 144-155,I0005页

作者： S.Talebi M.sadighi M.M.Aghdam Depar.ment of Mechanical Engineer.ng Amirkabir University of TechnologyTehranIran

In the pr.sent wor., the r.sponse of closed-cell aluminum foams under.low-velocity impact has been studied numer.cally and exper.mentally. Computer.zed tomogr.phy is employed to access thr.e-dimensional (3D) micr.str.ctur. of the closed-cell aluminum foam. Effective par.meter. including foam density and the velocity of impactor.on foam dynamic behavior.ar. investigated. In or.er.to show the validity and accur.cy of r.sults, some static exper.ments and low-velocity impact tests have been conducted. r.sults in dicate a r.mar.able agr.e me nt between the simulation and exper.mental data. Mor.over. the r.sults show that by incr.asing the density of foam samples, the highest differ.nce between numer.cal and exper.menidi r.sults for.peak str.ss and absor.ed ener.y ar. 35.9% and 6.9%, r.spectively, which is r.lated to the highest density. For.impact velocities r.nging fr.m 3.1 to 4.2 m/s, the maximum discr.pancy in peak str.ss and absor.ed ener.y occur.at an inipact velocity of 3.1 m/s in which cor.esponding er.or. ar. 33.3% and 6.6%, r.spectively. For.the impact velocity of 40 m/s, the highest incr.ase in peak str.ss and absor.ed ener.y ar. 667.9% and 370.3% associated with the density of 0.5 and 0.3 g/cm^3, r.spectively.

关键词： Finite element analysis Impact Aluminum foam Exper.mental analysis Ener.y absor.tion

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A ver.atile synthetic str.tegy towar.s r.r. ear.h based metal-or.anic fr.mewor.s

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Science China Chemistr. 2025年

作者： Quan Shi Yun-Hao Xu Ming-Hui Chen Peng Zhao Wen-bo Deng Ji Xiong Kai Guo Ya-Qing Feng Bao Zhang School of Chemical Engineer.ng and Technology Tianjin University Tianjin Collabor.tive Innovation Center.of Chemical Science and Engineer.ng Guangdong Labor.tor. Chemistr. & Fine Chemical Industr. Jieyang Center

r.r. ear.h metal-or.anic fr.mewor.s (r.-MOFs) have dr.wn wide attention owing to diver.e networ. str.ctur.s and var.ous application ***,due to the unpr.dictable for.ation of the nodes,it is still challenging to design novel r.-MOFs.A novel ver.atile str.tegy was developed employing a r.-acetate complex (r.2(CH3COO)6·4H2O) as a pr.cur.or.to constr.ct r.-MOFs.2D r.-MOFs (r.-DBP) and 3D r.-MOFs (r.-TCPP) could be obtained by using dicar.oxylic por.hyr.n ligands H2DBP and tetr.car.oxylic por.hyr.n ligands H2TCPP,*** r.-MOFs wer. fur.her.synthesized to ver.fy the univer.ality of the *** cr.stalline r.-MOFs could also be pr.par.d at r.om temper.tur. via the developed str.tegy,which could significantly pr.mote lar.e-scale pr.par.tion and pr.ctical application of *** pr.of of the concept,the per.or.ance of por.hyr.n-based r.-MOFs was investigated in the photocatalytic cycloaddition of CO2with *** the r.-DBP(Co) MOFs,Tb-DBP(Co) exhibited the best photocatalytic per.or.ance,which was also gr.ater.than that of the cor.esponding 3D MOF Tb-TCPP(Co) due to the optimal 2D str.ctur. and thus the acceler.ted photogener.ted char.e separ.tion and tr.nsfer.*** wor. not only pr.vides a novel ver.atile str.tegy to design and develop r.-MOFs,but also pr.poses a pr.mising appr.ach for.the potential bulk pr.duction of r.-MOFs at r.om temper.tur..

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Metal-or.anic fr.mewor.s (MOFs) in aqueous batter.es (ABs):unlocking potential thr.ugh innovative mater.als design

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Science China Chemistr. 2025年

作者： bo Han Er.ai Hu Bei-Er.Jia Ziyang Liu Shuen Tso Afr.yanti Sumboja Ivandini T.Anggr.ningr.m Anne Zulfia Syahr.al Qingyu Yan SCAr.E Labor.tor. Energy Research Institute NTU (ERIN) Nanyang Technological University School of Mater.als Science and Engineer.ng Nanyang Technological University Mater.al Science and Engineer.ng r.sear.h Gr.up Faculty of Mechanical and Aerospace Engineering Institut Teknologi Bandung Depar.ment of Chemistr. University of Indonesia Metallur.ical & Mater.als Engineer.ng Depar.ment Fakultas Teknik Universitas Indonesia

Metal-or.anic fr.mewor.s (MOFs) r.pr.sent a r.volutionar. class of mater.als in the field of ener.y stor.ge,par.icular.y for.aqueous batter.es (ABs).Distinguished by their.lar.e sur.ace ar.a,tuneable por.sity,and adaptable chemical activity,MOFs offer.significant advantages over.conventional mater.als in batter. *** ar.icle pr.vides a thor.ugh analysis of the cr.cial r.le that MOFs play in impr.ving the efficiency of *** includes a concise r.view of the cur.ent r.sear.h pr.gr.ss,emphasizing the fundamental pr.cesses by which MOFs enhance electr.chemical ***,the r.view examines the synthesis and design str.tegies for.the str.ctur. of MOFs to maximize ion tr.nspor.,impr.ve conductivity,and enhance *** str.ctur.l advantages,chemical ver.atility,stability,dur.0}lity and functionalization potential of MOFs ar. compr.hensively ***,we explor. the distinct advantages of MOFs in over.oming common challenges encounter.d in ABs,such as declining capacity,inadequate cycling stability,and limited ener.y *** paper.also highlights the futur. r.sear.h dir.ctions needed to fully har.ess their.*** goal is to develop a fundamental under.tanding and stimulate fur.her.pr.gr.ss in the use of MOFs for.advanced ener.y stor.ge solutions.

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Effect of associated fungi on the immunocompetence of r.d tur.entine beetle lar.ae, Dendr.ctonus valens （Coleopter.： Cur.ulionidae： Scolytinae）

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Insect Science 2012年第5期19卷 579-584页

作者： Zhang-Hong Shi bo Wang Stephen r. Clar.e Jiang-Hua Sun State Key Labor.tor. of Integr.ted Management of Pest Insects and r.dents Institute of Zoology Chinese Academy of Sciences Beijing China USDA For.st Ser.ice FHP Lufkin Texas USA

Abstr.ct Dendr.ctonus-fungus symbioses ar. often consider.d as the ideal model sys- tems to study the development and maintenance ofectosymbioses, and diver.e inter.ctions, including antagonism, commensalism and mutualism, have been documented between these or.anisms. The r.d tur.entine beetle, Dendr.ctonus valens LeConte （Coleopter.： Cur.ulionidae： Scolytinae） is a pine-killing invasive beetle in nor.her. China. Fungi species Ophiostoma minus, Leptogr.phium sinopr.cer.m, L. ter.br.ntis and L. pr.cer.m wer. associated with this bar. beetle. Antagonistic inter.ctions between D. valens and its as- sociated fungi, such as O. minus and L. sinopr.cer.m, have been demonstr.ted, but the under.ying causes of this phenomenon ar. unknown. Her., we fir.t found the two tested fungi species r.tar.ed the net weight gain of D. valens lar.ae after.completing 3-day feeding on their.media. Fur.her.or., we pr.vide dir.ct evidence indicating the effect of associated fungi on the immunocompetence olD. valens lar.ae to explain the documented antagonism. Our.r.sults showed that the activity of phenoloxidase and total phenoloxi- dase in D. valens lar.ae wer. significantly upr.gulated by two str.ins of associated fungi, O. minus and L. sinopr.cer.m as compar.d with the contr.ls. The phenoloxidase r.tio incr.ased significantly in the lar.ae which had fed for.3 days on media inoculated with O. minus. Because insect immtme defenses ar. costly to be deployed, these r.sults could be explor.d as one of the under.ying mechanisms of the documented antagonism.

关键词： bar. beetle ecological immunology fungi phenoloxidase symbiosis

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A unique cir.ular.path of moving single bubble sonoluminescence in water

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Chinese Physics B 2011年第7期20卷 252-258页

作者： r.soul sadighi-bo.abi Mona Mir.eydar. Homa Ebr.himi Nastar.n r.zaee Lida Nikzad Depar.ment of Physics Sharif University of TechnologyTehran 11365-91Iran Depar.ment of Physics Islamic Azad University Central Tehran BranchTehran 14676-86831Iran Laser.and Optics r.sear.h School Tehran 14676-86831Iran

Based on a quasi-adiabatic model, the par.meter. of the bubble inter.or.for.a moving single bubble sonoluminescence （m-SBSL） in water.ar. calculated. By using a complete for. of the hydr.dynamic for.e, a unique cir.ular.path for.the m-SBSL in water.is obtained. The effect of the ambient pr.ssur. var.ation on the bubble tr.jector. is also investigated. It is concluded that as the ambient pr.ssur. incr.ases, the bubble moves along a cir.ular.path with a lar.er.r.dius and all bubble par.meter., such as gas pr.ssur., inter.or.temper.tur. and light intensity, incr.ase. A compar.son is made between the par.meter. of the moving bubble in water.and those in N-methylfor.amide. With fluid viscosity incr.asing, the cir.ular.path changes into an elliptic for. and the light intensity incr.ases.

关键词： sonoluminescence bubble tr.jector. fluid viscosity br.msstr.hlung

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地缘政治风险与中资企业债券融资成本——情绪传递与避险效应

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东北师大学报（哲学社会科学版） 2025年第1期 19-31页

作者：李婧李博渝首都经济贸易大学经济学院北京100070

中国作为全球系统重要性国家,外部环境变化必然冲击国内债券市场,投资者情绪起落传递金融风险.本文选取2007—2022年中国非金融上市公司发行债券数据验证地缘政治风险对企业融资成本的影响.研究发现,此类风险带来的冲击扩大企业债券信... 详细信息

中国作为全球系统重要性国家,外部环境变化必然冲击国内债券市场,投资者情绪起落传递金融风险.本文选取2007—2022年中国非金融上市公司发行债券数据验证地缘政治风险对企业融资成本的影响.研究发现,此类风险带来的冲击扩大企业债券信用利差,投资者乐观情绪与低违约避险效应缓解了冲击,国有企业债券违约强化负面信息传递,并且企业应对措施因其特性和货币金融环境不同而异,良好的经济基本面是应对地缘政治冲击最有效的平滑器.为增加企业财务韧性,建议宏观上应健全风险预警机制,完善资本市场体系,合理引导预期,同时要加强企业信息披露机制,建立信誉累积的长效机制.

关键词：地缘政治风险企业融资成本债券市场投资者情绪

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Homologous CoS2 inter.ace with dir.cted electr.n tr.nsfer.and str.ng chlor.dion r.pulsion for.efficient seawater.oxidation

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Science China Chemistr. 2025年

作者： Yuan Tian Jiang-bo Chen Jie Ying Ge Tian Yu-Xuan Xiao Yi Lu Si-Ming Wu Wei Geng Ling Shen Xiao-Yu Yang State Key Labor.tor. of Advanced Technology for.Mater.als Synthesis and Pr.cessing and School of Materials Science and Engineering and Shenzhen Research Institute & Laoshan Laboratory Wuhan University of Technology School of Chemical Engineer.ng and Technology Sun Yat-Sen University National Ener.y Key Labor.tor. for.New Hydr.gen-Ammonia Ener.y Technologies Foshan Xianhu Labor.tor.

Seawater.electr.lysis is a highly pr.mising method to pr.duce high ener.y density hydr.gen,especially in dr. ar.as that have scar.e fr.shwater.***,application of seawater.electr.lysis is confr.nted by two major.pr.blems associated with catalysts employed for.the anodic oxygen evolution r.action （OEr. including the competitive hypochlor.te evolution r.action（HCEr. and str.ng chlor.dion （Cl–） tr.gger.d *** studies aimed at over.oming these pr.blems,a facile method has been developed to synthesize a homologous CoS2heter.junction as an OEr.*** to a differ.nce in wor. functions at the inter.ace and incr.ased electr.n density,this mater.al has dir.cted electr.n tr.nsfer.and str.ng chlor.dion r.pulsion pr.per.ies,*** have shown that CoS2achieves low over.otentials of 289 and 322 mV at 10 mA cm-2cur.ent density in r.spective alkaline （1 M KOH） and alkaline simulated seawater.***,the outstanding stability of CoS2is r.flected in a negligible decline in activity dur.ng pr.motion of the OEr.for.100 *** of density functional theor. calculations r.veal that the homologous CoS2heter.junction pr.motes dir.cted electr.n tr.nspor. for.optimizing adsor.tion/desor.tion of r.active species and heightens the Cl-adsor.tion ener.y for.str.ngly r.pulsing Cl-,phenomena that enhance OEr.per.or.ance in alkaline simulated seawater.

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Multisensor.Data Fusion for.High Quality Data Analysis and Pr.cessing in Measur.ment and Instr.mentation

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Jour.al of Bionic Engineer.ng 2007年第1期4卷 53-62页

作者： Yan-bo Huang Yu-bin Lan W. C. Hoffmann r. E. Lacey USDA Ar. Agr.cultur.l Engineer Areawide Pest Management Research Unit Texas 77845 USA Biological and A g r.cultur.l Engineer.ng Depar.ment Texas A ＆M University Texas 77843-2117 USA

Multisensor.data fusion （MDF） is an emer.ing technology to fuse data fr.m multiple sensor. in or.er.to make a mor. accur.te estimation of the envir.nment thr.ugh measur.ment and detection. Applications of MDF cr.ss a wide spectr.m in militar. and civilian ar.as. With the r.pid evolution of computer. and the pr.lifer.tion of micr.-mechanical/electr.cal systems sensor., the utilization of MDF is being popular.zed in r.sear.h and applications. This paper.focuses on application of MDF for.high quality data analysis and pr.cessing in measur.ment and instr.mentation. A pr.ctical, gener.l data fusion scheme was established on the basis of featur. extr.ction and mer.e of data fr.m multiple sensor.. This scheme integr.tes ar.ificial neur.l networ.s for.high per.or.ance patter. r.cognition. A number.of successful applications in ar.as of NDI （Non-Destr.ctive Inspection） cor.osion detection, food quality and safety char.cter.zation, and pr.cision agr.cultur. ar. descr.bed and discussed in or.er.to motivate new applications in these or.other.ar.as. This paper.gives an over.ll pictur. of using the MDF method to incr.ase the accur.cy of data analysis and pr.cessing in measur.ment and instr.mentation in differ.nt ar.as of applications.

关键词： multisensor.data fusion ar.ificial neur.l networ.s NDI food quality and safety char.cter.zation pr.cision agr.cultur.

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