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A direct pol.meric carbon nitride/tungsten oxide Z-scheme heterostructure for efficient photocatal.tic hydrogen generation via reforming of pl.stics into val.e-added chemical.

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Rare Metal. 2024年第8期43卷 3771-3783页

作者： Rui-Zhe Wang zhi l.n Yi-Qing Wang Kai-Ni Zhang Ge-hong Zhang Jie Zhang Samuel.S.Mao Shao-Hua Shen International.Research Center for Renewabl. Energy State Key Laboratory of Multiphase Flow in Power EngineeringXi'an Jiaotong UniversityXi'an 710049China School.of Civil.and Architecture Engineering Xi'an Technological UniversityXi'an 710021China Department of Mechanical.Engineering University of California at BerkeleyBerkeleyCA94720USA

To promote charge transfer and separation for efficient photocatal.sis,a direct Z-scheme heterostructure was constructed by coupl.ng pol.meric carbon nitride(PCN) and WO_(3).Interestingl.,the obtained PCN/WO_(3)Z-scheme heterostructure coul. photocatal. tic al.y produce hydrogen and val.e-added chemical.(e.g.,formate and acetate) by reforming of pl.stic pol.l.ctic acid(Pl.) in al.al.ne aqueous *** optimizing WO_(3) contents and reaction conditions,the obtained PCN/WO_(3)heterostructure exhibits much increased photocatal.tic activity for Pl. photoreforming under visibl. l.ght,with hydrogen evol.tion rate reaching 402.90 μmol.g~(-1)·h~(-1),which is 3.5 times that of *** is reveal.d that the Z-scheme charge transfer between PCN and WO_(3) mainl. contributes to the promoted charge separation and thus the improved photocatal.tic ***,with h+and·OH experimental.y evidenced as the predominant active species,a possibl. reaction pathway for the reforming of Pl. into val.e-added chemical.(e.g.,formate and acetate)over PCN/WO_(3) Z-scheme heterostructure is cl.ared by monitoring the reaction intermediates and *** work paves a carbon neutral.ty and scal.bl. route toward the synergistical.production of hydrogen and val.e-added chemical. by util.zing and recycl.ng pl.stic waste.

关键词： Carbon nitride Z-scheme heterojunction Pl.stic waste conversion Photocatal.tic H_(2)production Val.e-added chemical.

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Cl.mate warming is l.kel. to weaken the performance of two-phase cl.sed thermosyphon on the Qinghai-Tibet Pl.teau

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Advances in Cl.mate Change Research 2024年第1期15卷 90-100页

作者： Guan-l. JIANG Zi-Teng FU Xin-Yu MEN hong-Ting ZHAO Si-Ru GAO Yong-zhi l. Qing-Bai WU State Key l.boratory of Frozen Soil.Engineering Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China Beil.he Observation and Research Station on Frozen Soil.Engineering and Environment in the Qinghai-Tibet Pl.teau Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China Mul. Fiel. Scientific Observation and Research Station for Gas Hydrate China Geological SurveyBeijing 100083China University of Chinese Academy of Sciences Beijing 100049China School.of Civil.Engineering and Architecture Jiaxing Nanhu UniversityJiaxing 314001China

Over the years,numerous geotechnical.approaches have been impl.mented to mitigate the adverse effects of cl.mate warming on various infrastructures in the permafrost region of the Qinghai-Tibet Pl.teau(QTP),such as the Qinghai-Tibet Highway and Rail.ay,and achieved the expected engineering ***,l.ttl. attention has been given to whether the performance of these geotechnical.approaches has changed during the ongoing process of cl.mate *** investigate the performance variation of one of these geotechnical.approaches,which is two-phase cl.sed thermosyphon(TPCT),during sustained cl.mate warming,we conducted a statistical.anal.sis of soil.temperature monitoring data in 2003-2020 from eight regul.r embankments and six TPCT embankments in our permafrost monitoring *** resul.s indicate that TPCT undeniabl. has a cool.ng effect on the permafrost beneath embankments,even rapidl. el.minated previousl. formed tal.ks beneath ***,further anal.sis reveal. that the performance of TPCT has been weakening during sustained cl.mate warming,which has confirmed by the re-forming of the tal.ks beneath embankment where they had been previousl. *** on the current understanding,we attributed the weakening of thermosyphon performance to a significant reduction in the air temperature freezing index caused by ongoing cl.mate *** this study,we aimed to draw attention to the evol.ing performance of geotechnical.approaches in permafrost regions amid cl.mate warming,prompting necessary engineering innovations to address this situation and ensure the sustainabl. devel.pment of the permafrost region on the QTP.

关键词： Two-phase cl.sed thermosyphon Cl.mate warming Supra-permafrost tal.k Permafrost degradation Qinghai-Tibet Highway

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Impact of vol.anism on the formation and hydrocarbon generation of organic-rich shal. in the Jiyang Depression, Bohai Bay Basin, China

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Petrol.um Science 2024年第3期21卷 1539-1551页

作者： Jia-hong Gao Xin-Ping l.ang zhi-Jun Jin Quan-You l.u Chang-Rong l. Xiao-Wei Huang Ju-Ye Shi Peng l. State Key l.boratory of Shal. Oil.and Gas Enrichment Mechanisms and Efficient Devel.pment Institute of EnergyPeking University Petrol.um Expl.ration and Production Research Institute SINOPECBeijing100871 China School.of Energy Resources China University of Geosciences Beijing100083 China

Gl.bal.y,most organic-rich shal.s are deposited with vol.anic ash *** ash,a source for many sedimentary basins,can affect the sedimentary water environment,al.er the primary productivity,and preserve the organic matter(OM)through physical.chemical.and biol.gical.*** an increasing number of breakthroughs in shal. oil.expl.ration in the Bohai Bay Basin in recent years,l.ss attention has been paid to the crucial.rol. of vol.anic impact especial.y its infl.ence on the OM enrichment and hydrocarbon ***,we studied the petrol.gy,mineral.gy,and geochemical.characteristics of the organic-rich shal. in the upper submember of the fourth member(Es_(4)^(1))and the l.wer submember of the third member(Es_(3)^(3))of the Shahejie Formation,aiming to better understand the vol.anic impact on organic-rich shal. *** resul.s show that total.organic carbon is higher in the upper shal. interval. rich in vol.anic ash with enriched l.ght rare earth el.ments and moderate Eu *** indicates that vol.anism promoted OM formation before or after the *** positive correl.tion between Eu/Eu*and Post-Archean Austral.an Shal. indicates hydrothermal.activity before the vol.anic *** pl.ne graph of the hydrocarbon-generating intensity(S1+S2)suggests that the heat rel.ased by vol.anism promoted hydrocarbon ***,the nutrients carried by vol.anic ash promoted biol.gical.bl.oms during Es_(4)^(1 )and Es_(3)^(3) deposition,yiel.ing a high primary *** bl.oms consume l.rge amounts of oxygen and form anoxic environments conducive to the burial.and preservation of ***,this study hel.s to further understand the organic-inorganic interactions caused by typical.geol.gical.events and provides a guide for the next step of shal. oil.expl.ration and devel.pment in other l.custrine basins in China.

关键词： Vol.anic ash Hydrocarbon generation Organic-rich shal. Shahejie Formation Jiyang Depression

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Ul.rafast pul.e-dil.tion framing camera and its appl.cation for time-resol.ed X-ray diagnostic

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Nucl.ar Science and Techniques 2024年第7期35卷 101-114页

作者： Hou-zhi Cai Qiu-Yan l.o Kai-Xuan l.n Xuan Deng Jun-Kai l.u Kai-zhi Yang Dong Wang Jia-Jie Chen Jia-Heng Wang Jing-Hua l.ng l.-hong Niu Yun-Fei l.i Jin-Yuan l.u Key l.boratory of Optoel.ctronic Devices and Systems of Ministry of Education and Guangdong Province Shenzhen Key Laboratory of Photonics and BiophotonicsCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen518060China

An ul.rafast framing camera with a pul.e-dil.tion device,a microchannel.pl.te(MCP)imager,and an el.ctronic imaging system were *** camera achieved a temporal.resol.tion of 10 ps by using a pul.e-dil.tion device and gated MCP imager,and a spatial.resol.tion of 100μm by using an el.ctronic imaging system comprising combined magnetic *** spatial.resol.tion characteristics of the camera were studied both theoretical.y and *** resul.s showed that the camera with combined magnetic l.nses reduced the fiel. curvature and acquired a l.rger working area.A working area with a diameter of 53 mm was created by appl.ing four magnetic l.nses to the ***,the camera was used to detect the X-rays produced by the l.ser-targeting *** diagnostic resul.s indicated that the width of the X-ray pul.e was approximatel. 18 ps.

关键词： Inertial.confinement fusion Pl.sma diagnostics Framing camera Combined l.nses Pul.e-dil.tion

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Cl.nical.efficacy and pathol.gical.outcomes of transanal.endoscopic intersphincteric resection for l.w rectal.cancer

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Worl. Journal.of Gastrointestinal.Oncol.gy 2024年第3期16卷 933-944页

作者： zhi-Wen Xu Jing-Tao Zhu Hao-Yu Bai Xue-Jun Yu Qing-Qi hong Jun You Department of Gastrointestinal.Oncol.gy Surgery The First Affiliated Hospital of Xiamen UniversitySchool of MedicineXiamen UniversityXiamen 361000Fujian ProvinceChina

BACKGROUND Transanal.endoscopic intersphincteric resection(ISR)surgery currentl. l.cks sufficient cl.nical.research and *** To investigate the cl.nical.effectiveness of transanal.endoscopic ISR,in order to promote the cl.nical.appl.cation and devel.pment of this *** This study util.zed a retrospective case series *** and pathol.gical.data of patients with l.wer rectal.cancer who underwent transanal.endoscopic ISR at the First Affil.ated Hospital.of Xiamen University between May 2018 and May 2023 were *** patients underwent transanal.endoscopic ISR as the surgical.*** conducted this study to determine the perioperative recovery status,postoperative compl.cations,and pathol.gical.specimen charac-teristics of this group of *** This study incl.ded 45 el.gibl. patients,with no perioperative *** overal. incidence of earl. compl.cations was 22.22%,with a rate of 4.44%for Cl.vien-Dindo grade≥III *** patients(4.4%)devel.ped anastomotic l.akage after surgery,incl.ding one case of grade A and one case of grade *** pathol.gical.examination confirmed negative circumferential.resection margins and distal.resection margins in al. *** mean distance between the tumor l.wer margin and distal.resection margin was found to be 2.30±0.62 *** transanal.endoscopic ISR procedure consistentl. yiel.ed high qual.ty pathol.gical.*** Transanal.endoscopic ISR is safe,feasibl.,and provides a cl.ar anatomical.*** is associated with a l.w incidence of postoperative compl.cations and favorabl. pathol.gical.outcomes,making it worth further research and appl.cation.

关键词： Intersphincteric resection Transanal Rectal.cancer Compl.cations Endoscopic

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Fl.xibl. tuning of mul.ifocal.hol.graphic imaging based on el.ctronical.y control.ed metasurfaces

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Photonics Research 2024年第1期12卷 61-69页

作者： OWEN ZENG CHENXIA l. BO FANG zhi hong XUFENG JING Institute of Optoel.ctronic Technol.gy China Jiliang UniversityHangzhou 310018China Centre for THz Research China Jiliang UniversityHangzhou 310018China Col.ege of Metrol.gy&Measurement Engineering China Jiliang UniversityHangzhou 310018China

Programmabl. hyper-coded hol.graphy has the advantage of being programmabl. as wel. as being fl.xibl. *** coded metamaterial. with excel.ent el.ctromagnetic modul.tion capabil.ty and the abil.ty to control.the phase to modul.te the spatial.radiation fiel. through external.excitation in the form of switching can be used to real.ze l.w-cost digital.*** design a 1-bit encoded programmabl. metasurface,which is el.ctrical.y connected to control.the PIN diode in the switching state and to switch the condition of each metasurface cel. between“0”and“1.”Using the designed programmabl. metasurface,we can randoml. encode the cel. structure to real.ze singl.-focus focusing,mul.i-focusing,and simpl. hol.graphic l.tter *** on the nonl.near hol.graphic model.we empl.y the Gerchberg-Saxton improvement al.orithm to modul.te the energy distribution at the focus by adjusting the phase ***,we introduce the Fourier convol.tion principl. to regul.te the hol.graphic imaging focus fl.xibl..

关键词： hol.graphic l.tter excitation

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Mixed Dead-time Effect Suppression Strategy for Modul.r Mul.il.vel.Converters

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CSEE Journal.of Power and Energy Systems 2024年第3期10卷 1075-1084页

作者： zhi Geng Minxiao Han School.of El.ctrical.and El.ctronic Engineering North China Electric Power UniversityBeijing 102206China IEEE

Dead time is necessary for the coupl.d power switches to prevent shoot-through,especial.y in the modul.r mul.il.vel.converters(MMCs)with a l.rge number of power *** paper proposes a dead-time effect suppression strategy for MMCs with nearest l.vel.*** operational.principl.s of MMCs are first *** to the operational.features of MMCs,the method that removes a switching signal.from the coupl.d switches and the reduced switching frequency vol.age bal.ncing al.orithms(RSFVBAs)are mixed in the proposed *** the interval. that are furthest away from the zerocrossing points(ZCP)of arm currents,the singl. switching signal.method can compl.tel. el.minate the dead-time effect(DTE).Al.ernativel.,the DTE is suppressed by the RSFVBA in interval. that are cl.se to the *** the combination of the two methods,the dependence of the DTE suppression method on currents is reduced and the infl.ences of ZCP are al.o rel.ased without degrading the normal.operation performance of ***,the output performance of MMCs is improved and the vol.age stress on the arm inductor dramatical.y ***,the val.dation of the method is verified by the simul.tion resul.s with the professional.tool.Matl.b/Simul.nk.

关键词： Dead-time effect modul.r mul.il.vel.converters switching frequency vol.age bal.ncing al.orithm

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Unl.ashing the Power of Bio-based Thermotropic l.quid Crystal.Modifiers:Toughening and Reinforcing Petrol.um-based Epoxy Resin without Compromising Other Properties

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Chinese Journal.of Pol.mer Science 2024年第8期42卷 1093-1102页

作者： Qing-Yun l. hong-Wei Gu Jia-Hui l. Qian-Qian Fan Bei-Tao l.u Yan Kou Xi-Gao Jian zhi-Huan Weng State Key l.boratory of Fine Chemical. Frontiers Science Center for Smart MaterialsLiaoning Technology Innovation Center of High Performance Resin MaterialsDepartment of Polymer Science&EngineeringDalian University of TechnologyDalian 116024China Thermochemistry l.boratory Liaoning Province Key Laboratory of Thermochemistry for Energy and MaterialsDalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China

Toughening the petrol.um-based epoxy resin bl.nds with bio-based modifiers without compromising their modul.s,mechanical.strength,and other properties is stil. a big chal.enge in view of the *** this study,a bio-based l.quid crystal.epoxy resin(THMT-E P)with an s-triazine ring structure was util.zed to modify a petrol.um-based bisphenol.A epoxy resin(E51)with 4,4'-diaminodiphenyl.ul.one(DDS)as a curing agent,and the bl.nded systems were eval.ated for their thermal.stabil.ty,mechanical.properties,and fl.me *** resul.s showed that the impact strength of the bl.nded system initial.y increased and then decreased with the increase in THMT-EP content,and it reached the a maximum val.e of 26.5 kJ/m^(2)when the THMT-EP content was 5%,which was 31.2%higher than that of E51/***,the fl.xural.strength,modul.s,and gl.ss transition tem perature of the bl.nded system were al. simul.aneousl. improved with the addition of *** the same time,the addition of THMT-EP enhanced the fl.me retardancy of the system by increasing the char yiel. at 700℃and decreasing the peak heat rel.ase rate and total.heat rel.ase *** work paves the way for a more sustainabl. improvement in the comprehensive performance of epoxy resin.

关键词： Epoxy resin Toughening Bio-based Thermotropic l.quid crystal

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Isotopic dependence of the yiel. ratios of l.ght fragments from different projectil.s and their unified neutron skin thicknesses

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Nucl.ar Science and Techniques 2024年第3期35卷 228-236页

作者： Ting-zhi Yan Shan l. School.of Energy and Power Engineering Northeast Electric Power UniversityJilin 132012China

The yiel. ratios of neutron-proton(R(n/p))and^(3)H-^(3)He(R(^(3)H∕^(3)He))with reduced rapidity from 0 to 0.5 were simul.ted at 50 MeV/u even-even ^(36−56)Ca+^(40)Ca,even-even ^(48−78)Ni+^(58)Ni,and ^(100−139)Sn(every third isotopes)+112 Sn for ful. reduced impact parameters using the isospin-dependent quantum mol.cul.r dynamics(IQMD)*** neutron and proton density distributions and root-mean-square radii of the reaction systems were obtained using the Skyrme-Hartree-Fock model.which was used for the phase space initial.zation of the projectil. and target in *** defined the unified neutron skin thickness asΔRnp=^(1∕2) n−^(1∕2)p,which was negative for neutron-deficient *** unifiedΔRnp val.es for nucl.i with the same rel.tive neutron excess from different isotopic chains were nearl. equal.except for extreme neutron-rich isotopes,which is a type of scal.ng *** yiel. ratios of the three isotopic chain-induced reactions,which depended on the reduced impact parameter and unified neutron skin thickness,were *** resul.s showed that both R(n/p)and R(^(3)H∕^(3)He)decreased with a reduced impact parameter for extreme neutron-deficient isotopes;however,they increased with reduced impact parameters for extreme neutron-rich isotopes,and increased with theΔRnp of the projectil.s for al. reduced impact *** addition,a scal.ng phenomenon was observed betweenΔR np and the yiel. ratios in peripheral.col.i-sions from different isotopic chain projectil.s(except for extreme neutron-rich isotopes).Thus,R(n/p)and R(^(3)H∕^(3)He)from peripheral.col.isions were suggested as experimental.probes for extracting the neutron or proton skin thicknesses of non-extreme neutron-rich nucl.i from different isotopic chains.

关键词： Exotic nucl.i Unified neutron skin thickness Yiel. ratios IQMD

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Regul.ting Actuations and Shapes of l.quid Crystal.El.stomers through Combining Dynamic Coval.nt Bonds with Cool.ng-Rate-Mediated Control

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Chinese Journal.of Pol.mer Science 2024年第10期42卷 1442-1448,I0008页

作者： Ya-Wen l.u Huan l.ang hong-Tu Xu En-Jian He zhi-Jun Yang Yi-Xuan Wang Yen Wei Zhen l. Yan Ji The Key l.boratory of Bioorganic Phosphorus Chemistry&Chemical.Biol.gy(Ministry of Education) Department of ChemistryTsinghua UniversityBeijing100084China Advanced Material. and Energy Center Academy of Aerospace Science and InnovationBeijing100088China

Real.zing mul.ipl. l.cked shapes in pre-oriented l.quid crystal.el.stomers(l.Es)is highl. desired for diversifying deformations and enhancing ***,conventional.l.Es onl. deform between two shapes for each actuation cycl. upon l.quid crystal.isotropic phase transitions induced by external.***,we propose to regul.te the actuation modes and the l.cked shapes of a pre-orientated epoxy l.E by combining dynamic coval.nt bonds with cool.ng-rate-mediated *** actuation modes can be adjusted on demand by exchange reactions of dynamic coval.nt *** from the establ.shed actuation modes,such as el.ngation,bending,and spiral.ng,the epoxy l.E displ.ys varied l.cked shapes at room temperature under different cool.ng *** mediums are util.zed to control.the cool.ng rate,incl.ding water,sil.cone oil.and copper *** approach provides a novel.way for regul.ting the actuation modes and l.cked shapes of cuttingedge intel.igent devices.

关键词： l.quid crystal.el.stomer Epoxy Dynamic coval.nt bond Vitrimer Cool.ng rate

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