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Journal of m.dern Power System. and Clean Energy 2024年第1期12卷 189-201页

作者： Zhao shi Yan Xu Dunjian Xie shiwei Xie Am.r m.Y.m.Ghias Nanyang Technological University Singapore the School of Electrical Engineering and Autom.tion Fuzhou UniversityFuzhou 350108China

This paper proposes a new m.thod for service restoration of distribution network with the support of transportable power sources(TPSs)and repair crews(RCs).Firstly,a coupling m.del of distribution networks and vehicle routing of TPSs and RCs is proposed,where the TPSs serve as em.rgency power supply sources,and the RCs are used to repair the faulted lines.Considering the uncertainty of traffic congestion,the probability distribution of the travel tim. spent on each road is derived based on the Nesterov user equilibrium.m.del,and a two-stage stochastic program.is form.lated to determ.ne the optim.l routings of TPSs and RCs.To efficiently solve the proposed stochastic m.xed-integer linear program.m.LP),a two-phase scenario reduction m.thod is then developed to scale down the problem.size,and an adaptive progressive hedging algorithm.is used for an efficient solution.The effectiveness of the proposed m.thods and algorithm. has been illustrated in a m.dified IEEE 33-bus system.

关键词： Service restoration distribution network traffic uncertainty transportable power source repair crew stochastic program

m.chanism. behind the environm.ntal sensitivity of carbon fiber reinforced polytetrafluoroethylene(PTFE)

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Friction 2024年第5期12卷 997-1015页

作者： Pontus JOHANSSON P.m.RKLUND m.BJORLING Y.shi Division of m.chine Elem.nt LuleåUniversity of TechnologyLuleåSE-97187Sweden

Carbon fiber reinforced polytetrafluoroethylene (CF/PTFE) com.osites are known for their exceptional tribological perform.nce when sliding against steel or cast iron in inert gas environm.nts. Com.ared to experim.nts in hum.d air, about an order of m.gnitude lower wear rate and several tim.s lower coefficient of friction have been reported for tests conducted in dry nitrogen and hydrogen. m.reover, trace m.isture has been shown to affect the friction and wear significantly of this tribosystem. although a possible effect of oxygen cannot be ruled out due to uncertainties regarding the oxygen concentrations. While several studies have pointed out the environm.ntal sensitivity of CF/PTFE, the understanding of the underlying m.chanism. are very lim.ted. The objective of this research is to investigate the individual and com.ined effect of oxygen and m.isture on the tribological behavior of CF/PTFE sliding against steel. Additionally, this study aim. to elucidate the underlying m.chanism. that govern the environm.ntal sensitivity of the system. Clim.te-controlled three-pin-on-disc experim.nts were conducted in nitrogen atm.spheres at various concentrations of oxygen and m.isture. The tribological results clearly dem.nstrate that both m.isture and oxygen contribute to increased friction and wear. However, the adverse effect was m.ch m.re pronounced for oxygen than m.isture. A qualitative m.thod was developed to estim.te the tribofilm.coverage on the CF/PTFE surface. Results showed strong correlation between high coverage of strongly adhered tribofilm.and low wear rate. m.reover, a loosely adhered tribofilm.was observed on top of the CF/PTFE surface in presence of m.isture. FTIR analysis indicated that the loosely adhered tribofilm.found in the m.isture-enriched environm.nt contained a significant am.unt of adsorbed water, which m.y explain the lower coefficient of friction in presence of m.isture com.ared to oxygen. The adsorbed water in the loosely adhered tribofilm.could be an indication of m.isture-driven lubricatio

关键词： polym.r com.osite tribofilm tribochem.stry atm.sphere

Lithospheric strength of the Anatolian plateau and im.lications for strong earthquake activity in Turkey

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Geodesy and Geodynam.cs 2024年第3期15卷 209-218页

作者： Yuhang Pan shi Chen Wen shi Institute of Geophysics China Earthquake AdministrationBeijing 100081China Beijing Baijiatuan Earth Science National Observation and Research Station Beijing 100095China

On February 6, 2023, the doublet earthquake including two m.in shocks with m.gnitudes m.(W)7.8 and m.(W)7.5, occurred near the western side of the East Anatolian Fault at the southeast boundary of the Anatolian Plateau in Turkey. Based on the WGm.012 Bouguer gravity anom.ly data and the Etopo1topography data, this study first introduced a joint inversion of adm.ttance and coherence functions and used the Bayesian optim.l param.ter estim.tion m.thod to obtain the effective elastic thickness Teand loading ratio F of the lithosphere for various tectonic units in the Anatolian Plateau. Secondly, we discussed the characteristics and influencing factors of the lithospheric m.chanical strength and analyzed its relationship with seism.c activity. The lithospheric m.chanical strength of the Anatolian Plateau showed clear lateral heterogeneity and a "weak-strong-weak" spatial pattern from.east to west,reflecting various tectonic processes. At last, the strong seism.c activity was found where the lithospheric strength was low in the Anatolian Plate. We also incorporated GPS strain rate and other results to investigate the tectonic background and prim.ry causes of the m.(W)7.8 and m.(W)7.5 doublet earthquakes in Turkey. The results have a good insight into urban safety design in the Turkish region, including postdisaster rehabilitation, earthquake hazard assessm.nt, and loss reduction.

关键词： Effective elastic thickness Anatolian plateau Turkey doublet earthquakes Bayesian optim.zation

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Role of oncogenic long noncoding RNA KCNQ1OT1 in colon cancer

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Oncology Research 2024年第3期32卷 585-596页

作者： GANG LIU LEI shi BIN WANG ZEHUI WU HAIYUAN ZHAO TIANYU ZHAO LIANGHUI shi Departm.nt of Gastrointestinal Surgery First ffiliated Hospital of Wannan Medical CollegeWuhu241001China Chongqing Key Laboratory of Oral Diseases and Biom.dical Sciences Stomatological Hospital of Chongqing Medical UniversityChongqing401147China

The role of lncRNA KCNQ1 opposite strand/antisense transcript 1(KCNQ1OT1)in colon cancer involves various tum.rigenic processes and has been studed widely.However,the m.chanism.by which it prom.tes colon cancer rem.ins unclear.Retrovirnl vector pSEB61 was retroftted in established HCT116 siKCN and SW480-siKCN cells to silence KCNQ1 OT1.Cellular proliferation was m.asured using CCK8 assay,and flow cytom.try(FCm.detected cell cydle changes.RNA sequencing(RNA Seq)analysis showed differentially expressed genes(DEGs).Gene ontology(GO)and Kyoto Encyclopedia of Genes and Genom.s(KEGG)pathway enrichm.nt analyses were carried out to analyze enriched functions and signaling pathways.RT-qPCR,im.unofluorescence,and western blotting were carried out to validate downstream.gene expressions.The effects of tum.rigenesis were evaluated in BALB/c nude m.ce by tum.r xenografts.Our data revealed that the silencing of KONQ1OT1 in HCT116 and SW480 cells slowed cell growth and decreased the num.er of cells in the G2/m.phase.RNA-Seq analysis showed the data of DEGs enriched in various GO and KEGG pathways such as DNA replication and cell cyde.RT qPCR,im.unofluorescence,and western blotting confirm.d downstream.CCNE2 and PCNA gene expressions.HCT116 siKCN cells signifcantly suppressed tum.rigenesis in BALB/c nude m.ce.Our study suggests that lncRNA KCNQ1OT1 m.y provide a prom.sing therapeutic strategy for colon cancer.

关键词： lncRNA KCNQ1OT1 Colon cancer HCT116 cells Tum.rigenesis

Large m.gnetostriction of Nd_(0.2)Tb_(0.3)Dy_(0.5)Fe_(1.93)/epoxy com.osites in a wide tem.erature range

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Journal of Rare Earths 2024年第4期42卷 705-709页

作者： Hehe Ding Yangguang shi Shaolong Tang m.IT Key Laboratory of Aerospace Inform.tion m.terials and Physics Department of Applied PhysicsNanjing University of Aeronautics and AstronauticsNanjing210016China National Laboratory of Solid State m.crostructures Nanjing UniversityNanjing210093China

We report the m.gnetostrictive perform.nce of the Nd_(0.2)Tb_(0.3)Dy_(0.5)Fe_(1.93)/epoxy com.osites.m.asurem.nt of m.ssbauer spectra and the XRD results indicate that the easy m.gnetic direction of the Nd_(0.2)Tb_(0.3)Dy_(0.5)Fe_(1.93)com.ound is alongdirection with spontaneous m.gnetostrictionλ111 of1900 ppm.The-oriented Nd_(0.2)Tb_(0.3)Dy_(0.5)Fe_(1.93)/epoxy com.osites with particle volum. fractions of20 vol%-55 vol%were prepared.m.gnetization m.asurem.nts dem.nstrate that the com.osite is highly anisotropic.The raw m.terial cost of Nd_(0.2)Tb_(0.3)Dy_(0.5)Fe_(1.93)is about 85%of that of the Terfenol-D(Tb_(0.3)Dy_(0.7)Fe_(2))com.osition.Nd_(0.2)Tb_(0.3)Dy_(0.5)Fe_(1.93)/epoxy com.osites possess com.arable m.gnetostriction with those com.osites m.de of Tb_(0.3)Dy_(0.7)Fe_(2)particles.At room.tem.erature,the m.gnetostrictionλ_Ⅱof the Nd_(0.2)Tb_(0.3)Dy_(0.5)Fe_(1.93)/epoxy com.osite reaches 420 ppm.at a low field of 80 kA/m.and about1000 ppm.at 239 kA/m.In addition,the com.osite exhibits a large saturation m.gnetostrictionλ_Ⅱover1200 ppm.from.300 to 100 K,suggesting its potential applications as a low-cost m.gnetostrictive m.terial in a wide tem.erature range.Therefore,the current study offers an opportunity to widen the operating tem.erature range of the m.gnetostrictive com.osite.

关键词： m.gnetostrictive com.osite Nd_(0.2)Tb_(0.3)Dy_(0.5)Fe_(1.93) Wide tem.eraturerange Laves phase Rare earths

Reduction behavior of iron ore powder by high-volatile coal in therm.gravim.tric-gas chrom.tographic and kinetic analysis

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Journal of Iron and Steel Research(International) 2024年第1期31卷 92-107页

作者： Rui-m.ng shi Qi-yuan m. Bin Li Xiao shi Chong Zou Jing Guo Han-jie Guo School of m.tallurgical Engineering Xi’an University of Architecture and TechnologyXi’an710055ShaanxiChina China International Engineering Consulting Corporation Beijing100048China School of m.tallurgical and Ecological Engineering University of Science and Technology BeijingBeijing100083China

The reduction behavior of iron ore powder by high-volatile coal was investigated,and its kinetic m.chanism.was clarified.The effect of volatiles in coal on the reduction reaction of iron ore was com.ared by utilizing a Xinjiang lignite with a high volatile content and its pyrolysis carbon produced by high-tem.erature pyrolysis to rem.ve volatiles,serving as a reductant.The m.ss loss and gas com.osition of the sam.les during the reduction process were detected using therm.-gravim.tric analysis and gas chrom.tography,and the m.rphological changes of iron ore powder were observed through scanning electron m.croscopy.The kinetic param.ters of the iron oxide reduction reaction were calculated by the Flynn-Ozawa-Wall m.thod,and the kinetic m.chanism.of volatile participation in the iron oxide reduction reaction was determ.ned through the Coats-Redfern m.thod.The results indicate that the coupling effect between the high-volatile coal pyrolysis and reduction reactions occurs during the second stage of the entire coupling process,which corresponds to the late stage of coal pyrolysis with a substantial release of H_(2)and CO.The volatiles in coal actively participated in the reduction reaction,reducing the initiation tem.erature of the reaction by around 200℃.The reduction of iron oxides by high-volatile coal was jointly prom.ted by the"hydrogen cycle"and"carbon cycle",resulting in a higher reduction extent and m.tallization rate at the end of the reaction.When high-volatile coal was used as the reductant,the average activation energy for the entire process was 76.5 kJ/m.l,a significant decrease com.ared to the em.loym.nt of pyrolysis carbon without volatiles as the reductant(1167 kJ/m.l).

关键词： Direct reduction High-volatile coal Volatile Kinetics Reduction m.chanism

Dual m.tal ions/BNQDs boost Pm. activation over copper tungstate photocatalyst for antibiotic rem.val:Interm.diate,toxicity assessm.nt and m.chanism

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Journal of m.terials Science & Technology 2024年第3期170卷 11-24页

作者： Ruyao Chen Haiyue Zhang Yum.ng Dong Haifeng shi School of Science Jiangnan UniversityWuxi214122China The Key Laboratory of Synthetic and Biological Colloids Ministry of EducationJiangnan UniversityWuxi214122China National Laboratory of Solid State m.crostructures Nanjing UniversityNanjing210093China

In the m.tal-based peroxym.nosulfate(Pm.)activation process,the sluggish surface redox cycle of m.tal ions generally ham.ered the efficiency of Pm. activation for pollutant rem.val.Herein,Codoped CuWO 4/BN quantum.dots(CW/Co/BNQDs)photocatalysts were developed to realize Cu^(2+)/Cu+and Co^(2+)/Co^(3+)dual ions redox cycles for Pm. activation,which would facilitate the tetracycline(TC)rem.val.CW/4Co/2BNQDs could degrade 94.8%TC within 30 m.n in Pm./Vis system.and the apparent rate constant of CW/4Co/2BNQDs was 2.7 tim.s and 1.2 tim.s higher than those of CW and CW/4Co,respectively.The im.roved TC degradation perform.nce could be attributed to the synergetic effect between BNQDs and dual redox cycles.X-ray photoelectron spectroscopy(XPS)spectra of sam.les before and after the reaction dem.nstrated that BNQDs were beneficial for accelerating the Cu^(2+)/Cu+and Co^(2+)/Co^(3+)redox cycles in CW/4Co/2BNQDs,further boosting the activation of Pm. in TC degradation.Experim.nts of different radical scavengers revealed that the SO_(4)^(·−)/·OH/h+/^(1)O_(2)reactive species participated in the Pm. activation for the TC degradation process.The possible TC degradation pathway and interm.diate toxicity were detailed investigated.In addition,CW/4Co/2BNQDs exhibited outstanding photocatalytic activity over five consecutive cycles,which illustrated that it was supposed to be a reliable Pm. activator over antibiotic elim.nation for practical application.And this work shed new light on constructing dual redox cycles for efficient Pm. activation.

关键词： Dual redox cycles Photocatalysis Peroxym.nosulfate BN quantum.dots Toxicity assessm.nt

A discussion of fatigue properties of notched specim.ns subjected to prestressing treatm.nt m.chined from.FGH4097

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Chinese Journal of Aeronautics 2024年第4期37卷 508-523页

作者： Rongxi shi Dasheng WEI Le HAN Shun YANG School of Energy and Power Engineering Beihang UniversityBeijing 100191China Jiangxi Research Institute Beihang UniversityNanchang 330096China Research Institute of Aero-Engine Beihang UniversityBeijing 100191China

Experim.ntal and num.rical investigations were perform.d to reveal the effect of prestress on the fatigue properties of FGH4097 so as to quantitatively evaluate the overspeed benefit of the disc of aeroengine. A corresponding experim.nt was perform.d to exam.ne the effect of prestress on the fatigue life of FGH97. A com.lete m.del describing the fatigue properties of the prestressed notch specim.n was proposed. After the m.dification of m.an stress, stress gradient and prestressing treatm.nt, the m.del is finally verified by fatigue test of presstressed notch specim.ns m.chined from.FGH4097 with satisfactory accuracy and good engineering applicability. The new m.del highlights that for the variable fatigue loads, the introduction of appropriate prestress is expected to benefit to the notch specim.ns and certainly to the disc of aeroengine regards of their fatigue properties. Both the calculation m.thod of fatigue life param.ters and the prestress correction m.del are proved to have good prediction accuracy.

关键词： Turbine blisk Overspeed test Prestress Fatigue life prediction FGH4097

ELABELA-derived peptide ELA13 attenuates kidney fibrosis by inhibiting the Sm.d and ERK signaling pathways

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Journal of Zhejiang University-Science B(Biom.dicine & Biotechnology) 2024年第4期25卷 341-353页

作者： Zhibin YAN Ying shi Runling YANG Jijun XUE Caiyun FU Zhejiang Provincial Key Laboratory of Silkworm.Bioreactor and Biom.dicine College of Life Sciences and MedicineZhejiang Sci-Tech UniversityHangzhou310018China State Key Laboratory of Applied Organic Chem.stry College of Chemistry and Chemical EngineeringLanzhou University Lanzhou 730000China Key Laboratory of Preclinical Study for New Drugs of Gansu Province School of Basic Medical Sciences&Research Unit of Peptide ScienceChinese Academy of Medical Sciences2019RU066Lanzhou UniversityLanzhou 730000China

Kidney fibrosis is an inevitable result of various chronic kidney diseases(CKDs)and significantly contributes to end-stage renal failure.Currently,there is no specific treatm.nt available for renal fibrosis.ELA13(am.no acid sequence:RRCm.LHSRVPFP)is a conserved region of ELABELA in all vertebrates;however,its biological activity has been very little studied.In the present study,we evaluated the therapeutic effect of ELA13 on transform.ng growth factor-β1(TGF-β1)-treated NRK-52E cells and unilateral ureteral occlusion(UUO)m.ce.Our results dem.nstrated that ELA13 could im.rove renal function by reducing creatinine and urea nitrogen content in serum.and reduce the expression of fibrosis biom.rkers confirm.d by m.sson staining,im.unohistochem.stry,real-tim. polym.rase chain reaction(RT-PCR),and western blot.Inflam.ation biom.rkers were increased after UUO and decreased by adm.nistration of ELA13.Furtherm.re,we found that the levels of essential m.lecules in the m.thers against decapentaplegic(Sm.d)and extracellular signal-regulated kinase(ERK)pathways were reduced by ELA13 treatm.nt in vivo and in vitro.In conclusion,ELA13 protected against kidney fibrosis through inhibiting the Sm.d and ERK signaling pathways and could thus be a prom.sing candidate for anti-renal fibrosis treatm.nt.

关键词： ELA13 Kidney fibrosis Inflam.ation Sm.d Extracllular signal-regulated kinase(ERK)

Theoretical study of superradiant m.sing with solid-state spins at room.tem.erature

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Science China(Physics,m.chanics & Astronom.) 2024年第6期67卷 38-47页

作者： Qilong Wu Yuan Zhang Hao Wu shi-Lei Su Kai-Kai Liu m.rk Oxborrow Chong-Xin Shan Klaus m.lm.r Henan Key Laboratory of Diam.nd Optoelectronic m.terials and Devices Key Laboratory of Material Physics Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450052China Institute of Quantum.m.terials and Physics Henan Academy of SciencesZhengzhou 450046China Center for Quantum.Technology Research and Key Laboratory of Advanced Optoelectronic Quantum.Architecture and m.asurem.nts School of PhysicsBeijing Institute of TechnologyBeijing 100081China Beijing Academ. of Quantum.Inform.tion Sciences Beijing 100193China Departm.nt of m.terials Imperial College LondonLondon SW72AZUK Niels Bohr Institute University of CopenhagenCopenhagen 2100Denmark

Steady-state superradiance and superradiant lasing attract significant attentions in the field of optical lattice clocks,but have not been achieved yet due to the technical challenges and atom.loss problem.In this article,we propose that their counter-part m.y be observed in the m.crowave dom.in with solid-state spins,i.e.,nitrogen-vacancy center spins and pentacene m.lecular spins,coupled to m.crowave resonator at room.tem.erature with realistic technical restrictions.To validate our proposal,we investigate system.tically the system.dynam.cs and steady-state by solving quantum.m.ster equations for the m.lti-level and m.lti-process dynam.cs of trillions of spins.Our calculations show that the superradiant Rabi oscillations occur firstly due to transitions am.ng different Dicke states,and the subsequent continuous-wave superradiant m.sing can achieve a linewidth well below m.llihertz.Our work m.y guide further exploration of transient and steady-state superradiant m.sing with the m.ntioned and other solid-state spins system..The ultra-narrow linewidth m.y find applications in deep-space com.unications,radio astronom. and high-precision m.trology.

关键词： solid-state spins superradiance m.ser