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Advances in Atmospheric Sciences 2018年第7期35卷 868-880页

作者： Xia zhao guang YANG Jing WANG Key Laboratory of Ocean Circulation and Waves Institute of Oceanology Chinese Academy of Sciences and Qingdao National Laboratory for Marine Science and Technology Qingdao 266071 China Center for Ocean and Climate Research First Institute of Oceanography State Oceanic Administration Qingdao 266061 China Laboratory for Regional Oceanography and Numerical Modeling Qingdao National Laboratory for Marine Science and Technology Qingdao 266071 China

The present study investigates the persistence of summer sea surface temperature anomalies（SSTAs） in the midlatitude North Pacific and its interdecadal variability. Summer SSTAs can persist for a long time（approximately 8–14 months）around the Kuroshio Extension（KE） region. This long persistence may be strongly related to atmospheric forcing because the mixed layer is too shallow in the summer to be influenced by the anomalies at depths in the ocean. Changes in atmospheric circulation, latent heat flux, and longwave radiation flux all contribute to the long persistence of summer SSTAs. Among these factors, the longwave radiation flux has a dominant influence. The effects of sensible heat flux and shortwave radiation flux anomalies are not significant. The persistence of summer SSTAs displays pronounced interdecadal variability around the KE region, and the variability is very weak during 1950–82 but becomes stronger during 1983–2016. The changes in atmospheric circulation, latent heat flux, and longwave radiation flux are also responsible for this interdecadal variability because their forcings on the summer SSTAs are sustained for much longer after 1982.

关键词： SSTAs persistence summertime Kuroshio Extension cloud feedback interdecadal variability

Full-endoscopic spine surgery treatment of lumbar foraminal stenosis after osteoporotic vertebral compression fractures:A case report

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World Journal of Clinical Cases 2022年第2期10卷 656-662页

作者： Quan-Lai zhao Kun-Peng Hou Zhong-Xuan Wu Liang Xiao hong-guang Xu Department of Spine Surgery Wannan Medical CollegeWuhu 241001Anhui ProvinceChina

BACKGROUND Few reports have described lumbar foraminal stenosis-induced radiculopathy after treatment by full-endoscopic spine surgery(FESS)combined with percutaneous vertebroplasty(PVP)in patients with vertebral compression *** herein report such a case,including the patient’s treatment process and doctor’s surgical *** SUMMARY A 79-year-old man presented with symptoms of radiculopathy after sustaining L4 vertebral compression *** and physical examination revealed L4 vertebral compression fractures combined with L3/4 Lumbar foraminal stenosis(LFS).The patient’s symptoms were low back pain with pain in the lateral left *** many reports have described radiculopathy induced by osteoporotic vertebral compression fractures,the use of FESS combined with PVP has rarely been *** case report indicates that the combination of FESS and PVP is a safe and effective approach for the treatment of LFS-induced radiculopathy after vertebral compression *** minimally invasive technique has great potential to replace traditional lumbar fixation and decompression ***,we suggest the continued accumulation of similar cases to discuss the wider application of *** For patients with osteoporotic vertebral compression fracture(OVCF)and LFS,PVP and FESS can be used to restore the vertebral height and reduce the pressure around the intervertebral ***,the combination of FESS and PVP can treat the pain or numbness of the low back and lower limbs and allow for recovery in a short time with excellent postoperative *** general,FESS is a good treatment for radiculopathy caused by foraminal stenosis after OVCF.

关键词： Osteoporotic vertebral compression fracture Lumbar foraminal stenosis Percutaneous vertebroplasty Full-endoscopic spine surgery Radiculopathy Case report

Ag nanoparticles anchored on MIL-100/nickel foam nanosheets as an electrocatalyst for efficient oxygen evolution reaction performance

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Chinese Journal of Chemical Engineering 2022年第1期35卷 480-487页

作者： Tao zhao Dazhong Zhong Genyan Hao guang Liu Jinping Li Qiang zhao Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization College of Chemistry and Chemical EngineeringTaiyuan University of TechnologyTaiyuan 030024China

Metal-organic frameworks(MOFs)exhibit excellent application potential in the field of *** this study,we first prepare MIL-100 nanosheets on nickel foam(MIL-100/NF)and then successfully anchor Ag nanoparticles(NPs)on the nanosheets(Ag@MIL-100/NF)for oxygen evolution reaction(OER)*** strategy dramatically improves the conductivity of MIL-100 and the Ag NPs are uniformly dispersed on the *** Ag@MIL-100/NF catalyst has excellent electrocatalytic performance and long-term corrosion resistance,with a low overpotential of 207 mV and a long-term stability of at least 100 h at a current density of 50 mA·cm^(-2).The experimental results demonstrate that this high OER catalytic performance is due to the improved charge transfer after loading Ag NPs,the combination of nanosheets and highly dispersed Ag NPs that expose more active sites and the adjusted chemical valence states of Fe and Ni in *** work provides a surface decoration approach for the preparation of excellent catalysts directly used in the OER.

关键词： Ag@MIL-100/NF Metal-organic frameworks Catalysis Kinetics Overpotential Electrochemistry

Impacts of zinc layer and pouring method on interface performance for Al-22Si/ZL104 bi-metal

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China Foundry 2017年第1期14卷 39-45页

作者： Jun-feng zhao Fu-yang Cao Jian-fei Sun Xiao-guang Yuan hong-xian Shen Xin-yi zhao School of Materials Science and Engineering Shenyang University of TechnologyShenyang 110178China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China

Bi-metal material consisting of spray-formed Al-22Si and ZL104 is a suitable candidate for applications in internal combustion engines. This research investigated the effects of surface treatment and appropriate gating system on the microstructures and mechanical properties in evaluating the optimal strategy for producing high quality bi-metal materials. The bi-metal materials were prepared using ZL104 gravity casting by different pouring types around the spray-formed AI-22Si with varied surface treatments. The wettability between AI-22Si and ZL104 was significantly improved when Zn coating was used to remove the natural oxide layer. This research also obtained the improved interfacial microstructures and interracial bonding strength for materials when applying the appropriate pouring method. The hardness profiles of AI-22Si/ZL104 bi-metal were consistent with the observed microstructures. The average tensile strength of the bi-metal material with zinc coating is -42.3 MPa, which is much higher than that with oxide film at -10 MPa. The process presented is a promising and effective approach for developing materials in the automotive industry.

关键词： bi-metal AI alloy interface bonding zinc coating

Uniqueness to Some Inverse Source Problems for the Wave Equation in Unbounded Domains

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Acta Mathematicae Applicatae Sinica 2020年第1期36卷 134-150页

作者： guang-hui HU Yavar KIAN Yue zhao Beijing Computational Science Research Center Beijing 100193China Aix Marseille Univ Universit’e de ToulonCNRSCPTMarseilleFrance School of Mathematics and Statistics Central China Normal UniversityWuhan 430079China

This paper is concerned with inverse acoustic source problems in an unbounded domain with dynamical boundary surface data of Dirichlet *** measurement data are taken at a surface far away from the source *** prove uniqueness in recovering source terms of the form f(x)g(t)and f(x1,x2,t)h(x3),where g(t)and h(x3)are given and x=(x1,x2,x3)is the spatial variable in three *** these a priori information,we prove that the boundary data of a family of solutions can be used to recover general source terms depending on both time and spatial *** moving point sources radiating periodic signals,the data recorded at four receivers are prove sufficient to uniquely recover the orbit *** determination of embedded obstacles and source terms was verified in an inhomogeneous background medium using the observation data of infinite time *** approach depends heavily on the Laplace transform.

关键词： Inverse source problems Laplace transform moving point source uniqueness

Corrosivity of haze constituents to pure Mg

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Journal of Magnesium and Alloys 2020年第1期8卷 150-162页

作者： Chen zhao Fuyong Cao guang-Ling Song Center for Marine Materials Corrosion and Protection College of MaterialsXiamen University422 S.Siming Rd.Xiamen 361005China State Key Laboratory of Physical Chemistry of Solid Surfaces Xiamen University422 S.Siming Rd.Xiamen 361005China

The corrosion behavior of pure Magnesium(Mg)in a Mg(OH)2-saturated solution containing different individual constituents of PM2.5 in haze were studied by hydrogen evolution,weight loss and electrochemical *** results indicated that the corrosivity of these constituents to pure Mg decreased in the following order:(NH4)2SO4>Haze-contaminated-solution>NH4NO3>NH4Cl>NaCl≈KCl≈Na2SO4≈MgCl2≈CaSO4>Mg(OH)2(basic solution)>Ca(NO3)*** mechanisms behind the different corrosion behaviors of Mg in response to these constituents were also briefly discussed in this paper.

关键词： Haze(PM2.5) Mg Corrosion

Biomimetic chitosan scaffolds with long-term controlled release of nerve growth factor repairs 20-mm-long sciatic nerve defects in rats

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Neural Regeneration Research 2022年第5期17卷 1146-1155页

作者： Fa-Dong Liu hong-Mei Duan Fei Hao Wen zhao Yu-Dan Gao Peng Hao zhao-Yang Yang Xiao-guang Li Beijing Key Laboratory for Biomaterials and Neural Regeneration School of Biological Science and Medical EngineeringBeihang UniversityBeijingChina Department of Neurobiology Capital Medical UniversityBeijingChina Beijing International Cooperation Bases for Science and Technology on Biomaterials and Neural Regeneration Beijing Advanced Innovation Center for Biomedical EngineeringBeihang UniversityBeijingChina

Although autogenous nerve transplantation is the gold standard for treating peripheral nerve defects of considerable length,it still has some shortcomings,such as insufficient donors and secondary *** chitosan scaffolds loaded with controlled release of nerve growth factor can promote neuronal survival and axonal regeneration after short-segment sciatic nerve ***,the effects on extended nerve defects remain poorly *** this study,we used chitosan scaffolds loaded with nerve growth factor for 8 weeks to repair long-segment(20 mm)sciatic nerve defects in adult *** results showed that treatment markedly promoted the recovery of motor and sensory *** regenerated sciatic nerve not only reconnected with neurons but neural circuits with the central nervous system were also *** addition,the regenerated sciatic nerve reconnected the motor endplate with the target ***,this novel biomimetic scaffold can promote the regeneration of extended sciatic nerve defects and reconstruct functional *** provides a promising method for the clinical treatment of extended peripheral nerve *** study was approved by the Animal Ethics Committee of Capital Medical University,China(approval ***-2017-033)on March 21,2017.

关键词： axon chitosan functional recovery myelin sheath nerve growth factor peripheral nerve injury pseudorabies virus regeneration scaffold sciatic nerve

Amorphous iron-nickel phosphide nanocone arrays as efficient bifunctional electrodes for overall water splitting

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Green Energy & Environment 2021年第4期6卷 496-505页

作者： guang Liu Yun Wu Rui Yao Fei zhao Qiang zhao Jinping Li Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization College of Chemistry and Chemical EngineeringTaiyuan University of TechnologyTaiyuanShanxi 030024China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071China

The synthesis of low-cost and highly active electrodes for both oxygen evolution reaction(OER)and hydrogen evolution reaction(HER)is very important for water *** this work,the novel amorphous iron-nickel phosphide(FeP-Ni)nanocone arrays as efficient bifunctional electrodes for overall water splitting have been in-situ assembled on conductive three-dimensional(3D)Ni foam via a facile and mild liquid deposition *** is found that the FeP-Ni electrode demonstrates highly efficient electrocatalytic performance toward overall water *** 1 M KOH electrolyte,the optimal FeP-Ni electrode drives a current density of 10 mA cm^(-2) at overpotential of 218 mV for the OER and120 mV for the HER,and can attain such current density for 25 h without performance ***,a two-electrode electrolyzer comprising the FeP-Ni electrodes can afford 10 mA cm^(-2) electrolysis current at a low cell voltage of 1.62 V and maintain long-term stability,as well as superior to that of the coupled RuO_(2)/NFk Pt/C/NF *** characterizations confirm that the excellent electrocatalytic performances for water splitting are attributed to the unique 3D morphology of nanocone arrays,which could expose more surface active sites,facilitate electrolyte diffusion,and benefit charge transfer and also favorable bubble detachment *** work presents a facile and cost-effective pathway to design and develop active self-supported electrodes with novel 3D morphology for water electrolysis.

关键词： Water splitting Oxygen evolution reaction Hydrogen evolution reaction Phosphides Bifunctional electrodes

Salt-fog corrosion behavior of C/SiC and its effect on ablation resistance

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Journal of Materials Science & Technology 2019年第12期35卷 2772-2777页

作者： Su Cheng Xing zhao guang Yang Yiguang Wang Science and Technology on Thermostructural Composite Materials Laboratory Northwestern Polytechnical University

Carbon fiber-reinforced silicon carbide(C/SiC) composites are significantly important candidates for thermal protection materials. The corrosion mechanism of C/SiC composite materials is the basis of their optimization and application. In this study, structural evolution of C/SiC composites fabricated by chemical vapor infiltration was investigated in the salt-fog storage environment. Furthermore, the effect of salt-fog on their ablation behaviors under oxyacetylene flame environment was studied. The ablation morphologies and corrosion mechanisms of C/SiC composites were analyzed and discussed. The results indicated that silica layer with size of c.a. 20 nm was formed on the surface of composite. The extent of corrosion in salt fog was limited, and it had little effect on the ablation behavior of the C/SiC composites,as well on the tensile strength and bending strength.

关键词： Ceramic matrix composites Salt fog corrosion Oxidation Ablation property

Tadpole types of Chinese megophryid frogs （Anura： Mego- phryidae） and implications for larval evolution

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Current Zoology 2011年第1期57卷 93-100页

作者： Cheng LI Xian-guang GUO Yue-zhao WANG Chengdu Institute of Biology Chinese Academy of Sciences Chengdu Sichuan 610041 China Graduate University of the Chinese Academy of Sciences Beijing 100039 China

The larval body shapes and oral discs of 30 frog species from the family Megophryidae from China were examined. Using a phylogenetic framework derived from a Bayesian analysis of published mitochondrial cytochrome b and 16S rRNA gene sequences, we deduced a pattern of historical change among megophryid larval forms. These larvae were categorized into four types according to their body shapes and oral discs：（A） Leptobrachiini type, （B） Lalax type, （C） Brachytarsophrys type, and （D） Megophryini type, of which B and C are novel types. Type A is characterized by a typical oral disc with multiple rows of teeth, representing the tadpole type of the most recent common ancestor of the family Megophryidae. Type B has a typical oral disc with reduced tooth rows, an elongated labium, and integumentary glands. Type C has no labial teeth and a smaller umbelliform oral disc. Type D is characterized by a lack of labial teeth, an enlarged umbelliform oral disc, representing the tadpole of the most recent common ancestor of the subfamily Megophryinae. Our analysis supports the hypothesis that the umbelliform oral disc is apomorphic and also reveals the close association between morphology and microhabitat

关键词： Megophryidae Tadpoles Lalax type Brachytarsophrys type Novel tadpole types