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Earthquake Research in China 2016年第4期30卷 470-484页

作者： Zhou Shaohui Jiang Haikun Institute of Earthquake Science CEABeijing 100036China vChina Earthquake Networks Center Beijing 100045China

This paper briefly introduces the current research progress in the field of foreshocks,both in China and abroad,and contrasts the common characteristics and the mechanisms of foreshocks of the sequence under the definition of different conditions of foreshocks. The main recognition methods of foreshocks are briefly reviewed,and their characteristics and existing problems are reviewed and discussed. Foreshocks are small earthquakes that occur before the mainshock and adjacent to the main source location. A foreshock sequence is constituted of a series of foreshock activities that occur before the mainshock. The proportion of earthquake cases includes direct foreshocks ranging from 10% - 40% at different defined conditions of foreshocks. Theoretically,cascade model or pre-slid model can explain foreshocks. Foreshocks are mainly concentrated in the range of 10km -75 km of the mainshock,but their time distribution form is very complicated,mostly prior to the mainshock from 1 or 2 days,the seismicity rate of part of foreshock sequences shows significant acceleration features,but many foreshock sequences often show the attenuation characteristics of mainshock-aftershock sequences. The most prominent feature of foreshocks is a focal consistent mechanism and low b-value of earthquakes of the earthquake sequence. Foreshocks seems to have a certain relationship with tectonic environment and the rupture form of the mainshock,in limited foreshocks earthquake cases,the dip-thrusting earthquakes seem to have relatively more foreshocks. The results of some of the earthquake cases show that the focal depth of foreshocks gradually moved downward with the mainshock approaching. So far,it is difficult to determine whether an earthquake or an earthquake sequence is a foreshock or foreshock sequence before the mainshock. The identification methods of foreshocks mainly include a statistical method of analogy,focal consistent mechanism and related derivative method,the fine detection of the earthquake nucleation process. From a few exi

关键词：前震序列地震活动率综述识别方法大地构造环境余震序列地震序列成核过程

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Comparative Study of Changes in Stress-drop of the Jinggu MS6.6 and Ludian MS6.5 Earthquake Sequences

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Earthquake Research in China 2017年第2期31卷 151-168页

作者： Zhou Shaohui Jiang Haikun Qu Junhao Earthquake Administration of Shandong Province Jinan 250102 China China Earthquake Networks Center Beijing 100045 China

The earthquake stress-drop values of two sequences were accurately calculated after taking away the effects due to regional earthquake anelastic attenuation and station site response,using waveform data and seismic phase data of sequences of the Jinggu M_S6. 6,and Ludian M_S6. 5 earthquakes in Yunnan. These results show that the stress drop with magnitude increases within the scope of this study of magnitude. After eliminating the influence of the magnitude,the average value of stress-drop in the Jinggu sequence is higher than that of the Ludian sequence at the same magnitude range. This may be related to the stress state in different regions. In terms of the changes of time and space of stress-drop,before M_S5. 8 strong aftershock,the stress-drop is "slowing down-turning up-keeping a high value"after the mainshock,meanwhile,almost all of the abnormally high stress drop value is distributed around the M_S5. 8 strong aftershock, showing that the stress environment in the region was increasing after the mainshock. And after the M_S5. 9 strong aftershock,stress-drop rapidly declines to a relatively stable state,meanwhile,the high value of stress-drop is distributed around the strong aftershock,showing that the regional tectonic stress gets more fully release,its stress environment begins to rapidly decrease.For the Ludian sequence without a strong aftershock occurring,the average value of stress drop is lower than that of the Jinggu earthquake sequence at the same magnitude range,while at the same time,the stress-drop of the aftershock sequence almost hasn't changed much. In the time after the mainshock,combined with the release characteristics of the main energy,the stress in the region is excessively released,the subsequent stress in the region gradually returns to normal. This may be the reason why the activity of Ludianaftershocks significantly was weaker and subsequently there were no strong aftershocks occurred.

关键词：地震序列应力降区域构造应力时间序列应力状态应力环境非弹性衰减强余震

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Response of growth,metabolism and yield of Dendrocalamopsis oldhami to long-day photoperiod and fertilizer compensation

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Journal of Forestry Research 2023年第1期34卷 151-166页

作者： Zixu Yin shaohui Fan Wen Xia Yang zhou Xiao zhou Xuan Zhang Chengji Li Fengying Guan International Center for Bamboo and Rattan Key Laboratory of National Forestry and Grassland AdministrationBeijing 100102People’s Republic of China National Location Observation and Research Station of the Bamboo Forest Ecosystem in Yixing National Forestry and Grassland AdministrationYixing 214200People’s Republic of China

The effects of long-day photoperiod on growth,photo synthetic fluorescence,carbon and nitrogen metabolism,and yield of Dendrocalamopsis oldhami and the compensation effects of fertilization were investigated.A completely randomized design was used with two light factors(bamboo culms cultivated in solar greenhouse under long-day[Ls]and short-day[Ln]treatments);two organic nitrogen fertilizer levels(application of organic fertilizer[OF]and no organic fertilizer[NF]);and three nitrogen fertilizer levels(Low[N0],medium[N1]and high nitrogen[N2]).Leaf chlorophyll and fluorescence parameters(φPo,PIABS,and ETo/CSm)decreased and DIo/CSmincreased in Ls compared to Ln.Indole acetic acid(IAA)and gibberellic acid(GA3)levels decreased,whereas abscisic acid(ABA)increased.Leaf area decreased and leaf dry mass increased.The contents of carbon and nitrogen metabolism-related enzymes(nitrate reductase,glutamine synthetase,amylase,and sucrose synthase)and products(total nitrogen,organic carbon,soluble sugar,and starch)increased.Single bamboo shoot weight and diameter at breast height decreased,whereas shoot quantity and total yield increased.Fertilizer application significantly affected physiological growth and yield in the two light treatments,thus promoting carbon and nitrogen metabolism.TheφPo,PIABS,IAA,and GA3contents increased slightly,whereas ABA levels decreased.Shoot quantity,individual weight,and total yield improved.IA A,soluble sugar,and total yield to organic manure and light were lower than those of nitrogen levels(FN>FL,FO).Other indicators showed lower responses to different fertilization treatments than the light factor(FL>FN,FO).The ability of D.oldhami to alter its morphological and physiobiochemical traits and yield in response to variations in light applications may translate into high phenotypic plasticity.Fertilization significantly improved photoplasticity of D.oldhami.Under Ls,D.oldhami had high metabolic rates.was easily inhibited by light,and showed accelerated leaf senescence,and shoot quantity and total o

关键词： Light Nitrogen Organic fertilizer Fluorescence parameters Carbon and nitrogen metabolism Yield

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Dynamic response analysis of a multiple-beam structure subjected to a moving load

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Earthquake Engineering and Engineering Vibration 2022年第3期21卷 769-784页

作者： Zhang Yuntai Jiang Lizhong zhou Wangbao Liu shaohui Feng Yulin Liu Xiang Lai Zhipeng School of Civil Engineering Central South UniversityChangsha 410075China National Engineering Laboratory for High Speed Railway Construction Changsha 410075China School of Civil Engineering and Architecture East China Jiaotong UniversityNanchang 330013China

In this study,the dynamic response of an elastically connected multi-beam structure subjected to a moving load with elastic boundary conditions is investigated.The boundary conditions and properties of each beam vary,and the difficulty of solving the motion equation is reduced by using a Fourier series plus three special transformations.By examining a high-speed railway(HSR)with mixed boundary conditions,the rationality for the newly proposed method is verified,the difference in simulated multiple-beam models with different beam numbers is explored,and the influence of material parameters and load speed on the dynamic response of multiple-beam structures is examined.Results suggest that the number of beams in the model should be as close to the actual beam number as possible.Models with an appropriate beam number can be used to describe in detail the dynamic response of the structure.Neglecting the track-structure can overestimate the resonant speed of a high-speed railway,simply-supported beam bridge.The effective interval of foundation stiffness(EIFS)can provide a reference for future engineering designs.

关键词： multiple-beam dynamic analysis moving load mixed boundary conditions

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Challenges and opportunities in 2D high-entropy alloy electrocatalysts for sustainable energy conversion

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SusMat 2023年第6期3卷 730-748页

作者： Die Lu Xinyao Fu Dong Guo Wei Ma shaohui Sun Gonglei Shao Zhen zhou Interdisciplinary Research Centerfor Sustainable Energy Scienceand Engineering(IRC4SE^(2)) School of Chemical EngineeringZhengzhou UniversityZhengzhouChina

Two-dimensional(2D)high-entropy alloys(HEAs)have emerged as promising electrocatalysts due to the benefits of polymetallic coordination and robust elec-trical conductivity.However,the multiple elements in 2D HEAs pose challenges in achieving a uniform composition and maintaining a 2D limit morphology,complicating their structural characterization.Furthermore,even minor adjust-ments to the composition can significantly alter the properties of 2D HEAs,underscoring the need for a deeper understanding of their structure-property relationships to advance synthesis and application.Therefore,this review crit-ically examines the intrinsic factors influencing synthesis methods and the practical applications of 2D HEAs in electrocatalysis for sustainable energy con-version.The urgency is emphasized for developing new synthesis techniques,enhancing advanced characterization methods,and gaining profound insights into the functional mechanisms of 2D HEAs.

关键词： electrocatalysis high-entropy alloys structure-property relationships synthesis methods two-dimensional materials

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Microbial synthesis of N, P co-doped carbon supported PtCu catalysts for oxygen reduction reaction

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Journal of Energy Chemistry 2023年第9期84卷 486-495页

作者： shaohui Zhang Suying Liu Jingwen Huang Haikun zhou Xuanzhi Liu Pengfei Tan Haoyun Chen Yili Liang Jun Pan State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083HunanChina State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082HunanChina School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083HunanChina School of Resources and Environment Hunan University of Technology and BusinessChangsha 410205HunanChina

Developing highly efficient and stable platinum-based electrocatalyst for oxygen reduction reaction(ORR) is critical to expediting commercialization of fuel cells.Herein,several PtCu alloy nanocatalysts supported on N,P co-doped carbon(PtCu/NPC) were prepared by microbial-sorption and carbonization-reduction.Among them,PtCu/NPC-700 ℃ exhibits excellent catalytic performance for ORR with a mass activity of 0.895 A mg_(pt)^(-1)(@0.9 V) which is 8.29 folds of commercial Pt/C.Additionally,the ECSA and MA of PtCu/NPC-700℃ only decrease by 14.2% and 18.7% respectively,while Pt/C decreases by 35.2% and 52.8% after 10,000 cycles of ADT test.Moreover,the PtCu/NPC-700℃ catalyst emanates a maximum power density of 715 mW cm^(-2) and only 11.1% loss of maximum power density after 10,000 ADTs in single-cell test,indicating PtCu/NPC-700℃ also manifests higher activity and durability in actual single-cell operation than Pt/C.This research provides an easy and novel strategy for developing highly active and durable Pt-based alloy catalyst.

关键词： Microbial synthesis N P co-doping PtCu catalyst Oxygen reduction reaction

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Highly active cobalt-doped nickel sulfide porous nanocones for high-performance quasi-solid-state zinc-ion batteries

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Journal of Energy Chemistry 2022年第3期31卷 237-249,I0008页

作者： Xin Tong Yun Li Ning Pang Yang zhou Dajun Wu Dayuan Xiong shaohui Xu Lianwei Wang Paul K.Chu Key Laboratory of Polar Materials and Devices(MOE) Department of ElectronicsEast China Normal UniversityShanghai 200241China Jiangsu Laboratory of Advanced Functional Materials School of Electronic and Information EngineeringChangshu Institute of TechnologyChangshu 215500JiangsuChina School of Physics and Electronic Engineering Hanshan Normal UniversityChaozhou 521041GuangdongChina Department of Physics Department of Materials Science and Engineeringand Department of Biomedical EngineeringCity University of Hong KongKowloon 999077Hong KongChina

Flexible quasi-solid zinc-ion batteries(ZIBs)have large potential in power applications due to the low price,wearable nature,safety,and high capacity.However,the use of transition metal sulfide cathodes in ZIBs has not been studied extensively and the underlying mechanism and theoretical basis of this type of batteries are not well understood.Herein,a highly active cobalt-doped Ni_(3)S_(2) porous nanocone framework(C12NS)is designed and demonstrated as a zinc-ion battery electrode.First-principles calculation and experiments reveal that the cobalt dopant improves the battery properties greatly.The assembled flexible zinc-ion battery exhibits a high specific capacity of 453.3 mAh g^(−1)at a current density of 0.4 A g^(−1)in as well as excellent cycling stability as manifested by a capacity retention ratio of 89.5%at a current density of 4 A g^(−1)after 5000 cycles.The peak energy density of 553.9 Wh kg^(−1)is also superior to those of most recently reported NiCo-based zinc-ion batteries.More importantly,the flexible battery can be operated under severe mechanical bending and even continues to work after physical puncturing without showing leakage.These exciting results not only reveal a novel design of cathode materials for zinc-based batteries,but also suggest their immense commercial potential in portable and wearable electronics.

关键词： Zn-ion battery Quasi-solid electrolyte Nanocone Doping Wearable electronic

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Chemical-NIR dual-powered CuS/Pt nanomotors for tumor hypoxia modulation,deep tumor penetration and augmented synergistic phototherapy

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Journal of Materials Science & Technology 2023年第17期148卷 171-185页

作者： Wenjun Wang Enhui Ma Pengyu Tao Xiaoyu zhou Yujuan Xing Liang Chen Yingying Zhang Jingjing Li Kai Xu Hong Wang shaohui Zheng School of Medical Imaging Xuzhou Medical UniversityXuzhou 221006China School of Chemical Engineering&Technology China University of Mining and TechnologyXuzhou 221116China Department of Radiology Affiliated Hospital of Xuzhou Medical UniversityXuzhou 221004China

The complex tumor microenvironment(TME)with the characteristics of severe hypoxia,enriched hydro-gen peroxide(H_(2)O_(2))and dense nature significantly restricted the therapeutic efficacy of nanomedicine in cancer treatment.Synthetic micro/nanomotors have shown multiple versatility in modulating the abnor-mal TME and overcoming the limited penetration in solid tumor.Herein,we constructed a chemical-NIR dual-propelled nanomotor based on CuS/Pt Janus nanoparticles with IR820 encapsulation for hypoxia alle-viation,deep tumor penetration and augmented synergistic photodynamic(PDT)and photothermal ther-apy(PTT).The deposited Pt effectively catalyzed tumor endogenous H_(2)O_(2) into oxygen,which extremely relieved the tumor hypoxia state and allowed the chemical propulsion of nanomotors.Under NIR irra-diation,the Janus nanomotors exhibited more obvious movement via efficient photothermal conversion.Such autonomous motion significantly improved the tumoral accumulation of nanomotors and facilitated much deeper penetration inside tumor in vivo.In addition,enriched oxygen also promoted the genera-tion of reactive oxygen species(ROS)for augment of PDT,which achieved satisfied antitumor effect in combination with the PTT treatment.Therefore,this strategy based on CuS/Pt Janus nanomotors would provide an innovative dimension for considerable applications in effective cancer management.

关键词： CuS/Pt Janus nanomotors Chemical-NIR dual-propulsion Deep tumor penetration Hypoxia alleviation Synergistic PDT and PTT

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Changes in the gut microbiota of osteoporosis patients based on 16S rRNA gene sequencing:a systematic review and meta-analysis

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2022年第12期23卷 1002-1013页

作者： Rui HUANG Pan LIU Yiguang BAI Jieqiong HUANG Rui PAN Huihua LI Yeping SU Quan zhou Ruixin MA shaohui ZONG Gaofeng ZENG College of Public Hygiene of Guangxi Medical University Nanning 530021China Department of Spine Osteopathic the First Affiliated Hospital of Guangxi Medical UniversityNanning 530021China Department of Orthopaedics the Third Affiliated Hospital of Xinxiang Medical UniversityNanning 530022China Department of Orthopaedics Nanchong Central Hospitalthe Second Clinical Institute of North Sichuan Medical CollegeXinxiang 45300China Department of Wound Repair the First People’s Hospital of NanningNanchong 637000China

Background:Osteoporosis(OP)has become a major public health issue,threatening the bone health of middle-aged and elderly people from all around the world.Changes in the gut microbiota(GM)are correlated with the maintenance of bone mass and bone quality.However,research results in this field remain highly controversial,and no systematic review or meta-analysis of the relationship between GM and OP has been conducted.This paper addresses this shortcoming,focusing on the difference in the GM abundance between OP patients and healthy controls based on previous 16S ribosomal RNA(rRNA)gene sequencing results,in order to provide new clinical reference information for future customized prevention and treatment options of OP.Methods:According to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses(PRISMA),we comprehensively searched the databases of Pub Med,Web of Science,Embase,Cochrane Library,and China National Knowledge Infrastructure(CNKI).In addition,we applied the R programming language version 4.0.3 and Stata 15.1 software for data analysis.We also implemented the Newcastle-Ottawa Scale(NOS),funnel plot analysis,sensitivity analysis,Egger’s test,and Begg’s test to assess the risk of bias.Results:This research ultimately considered 12 studies,which included the fecal GM data of 2033 people(604 with OP and 1429 healthy controls).In the included research papers,it was observed that the relative abundance of Lactobacillus and Ruminococcus increased in the OP group,while the relative abundance for Bacteroides of Bacteroidetes increased(except for Ireland).Meanwhile,Firmicutes,Blautia,Alistipes,Megamonas,and Anaerostipes showed reduced relative abundance in Chinese studies.In the linear discriminant analysis Effect Size(LEfSe)analysis,certain bacteria showed statistically significant results consistently across different studies.Conclusions:This observational meta-analysis revealed that changes in the GM were correlated with OP,and variations in some advantageous GM might involve regional differences.

关键词： Osteoporosis Microbiome Intestinal 16S ribosomal RNA(rRNA)sequencing

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Meter-Scale Thin-Walled Structure with Lattice Infill for Fuel Tank Supporting Component of Satellite:Multiscale Design and Experimental Verification

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工程与科学中的计算机建模(英文) 2024年第1期138卷 201-220页

作者： Xiaoyu Zhang Huizhong Zeng shaohui Zhang Yan Zhang Mi Xiao Liping Liu Hao zhou Hongyou Chai Liang Gao Beijing Key Laboratory of Lightweight Multi-Functional Composite Materials and Structures Beijing Institute of TechnologyBeijing100081China Beijing Key Laboratory of Intelligent Space Robotic Systems Technology and Applications Beijing Institute of Spacecraft System EngineeringChina Academy of Space TechnologyBeijing100094China Key Laboratory of Metallurgical Equipment and Control Technology Ministry of EducationWuhan University of Science and TechnologyWuhan430081China State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan430074China

Lightweight thin-walled structures with lattice infill are widely desired in satellite for their high stiffness-to-weight ratio and superior buckling strength resulting fromthe sandwich effect.Such structures can be fabricated bymetallic additive manufacturing technique,such as selective laser melting(SLM).However,the maximum dimensions of actual structures are usually in a sub-meter scale,which results in restrictions on their appliance in aerospace and other fields.In this work,a meter-scale thin-walled structure with lattice infill is designed for the fuel tank supporting component of the satellite by integrating a self-supporting lattice into the thickness optimization of the thin-wall.The designed structure is fabricated by SLM of AlSi10Mg and cold metal transfer welding technique.Quasi-static mechanical tests and vibration tests are both conducted to verify the mechanical strength of the designed large-scale lattice thin-walled structure.The experimental results indicate that themeter-scale thin-walled structure with lattice infill could meet the dimension and lightweight requirements of most spacecrafts.

关键词： Thin-walled structure lattice infill supporting component selective laser melting satellite

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