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Crustal and upper mantle structure and the deep seismogenic environment in the source regions of the Lushan earthquake and the Wenchuan earthquake

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Science China Earth Sciences 2013年第6期56卷 1158-1168页

作者： ZHENG Yong GE Can XiE ZuJun yang YingJie xiong xiong HSU HouTze State Key Laboratory of Geodesy and Earth's Dynamics Chinese Academy of Sciences College of Earth Sciences University of Chinese Academy of Sciences Australian Research Council Centre of Excellence for Core to Crust Fluid Systems/GEmOC Department of Earth and Planetary SciencesMacquarie University

Following the m w 7.9 Wenchuan earthquake, the m w 6.6 Lushan earthquake is another devastating earthquake that struck the Longmenshan Fault Zone (LFZ) and caused severe damages. in this study, we collected continuous broadband am.ient noise seismic data and earthquake event data from Chinese provincial digital seismic network, and then utilized am.ient noise tomography method and receiver function method to obtain high resolution shear wave velocity structure, crustal thickness, and Poisson ratio in the earthquake source region and its surroundings. Based on the tomography images and the receiver function results, we further analyzed the deep seismogenic environment of the LFZ and its neighborhood. We reveal three m.in findings: (1) There is big contrast of the shear wave velocities across the LFZ. (2) Both the Lushan earthquake and the Wenchuan earthquake occurred in the regions where crustal shear wave velocity and crustal thickness change dramatically. The rupture faults and the aftershock zones are also concentrated in the areas where the lateral gradients of crustal seismic wave speed and crustal thickness change significantly, and the focal depths of the earthquakes are concentrated in the transitional depths where shear wave velocities change dramatically from laterally uniform to laterally non-uniform. (3) The Wenchuan earthquake and its aftershocks occurred in low Poisson ratio region, while the Lushan earthquake sequences are located in high Poisson ratio zone. We proposed that the effect of the dramatic lateral variation of shear wave velocity, and the gravity potential energy differences caused by the big contrast in the topography and the crustal thickness across the LFZ may constitute the seismogenic environment for the strong earthquakes in the LFZ, and the Poisson ratio difference between the rocks in the south and north segments of the Longmenshan Fault zone may explain the 5 years delay of the occurrence of the Lushan earthquake than the Wenchuan

关键词： Lushan earthquake Wenchuan earthquake receiver function am.ient noise tomography deep seismogenic environ-ment

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Viability of all-solid-state lithium metal battery coupled with oxide solid-state electrolyte and high-capacity cathode

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Journal of Energy Chemistry 2024年第4期91卷 122-131页

作者： Xingxing Jiao Xieyu Xu Yongjing Wang Xuyang Wang Yaqi Chen Shizhao xiong Weiqing yang Zhongxiao Song yangyang Liu Research institute of Frontier Science Southwest Jiaotong UniversityChengdu 610031SichuanChina State Key Laboratory for mechanical Behavior of materials Xi'an Jiaotong UniversityXi'an 710049ShaanxiChina Department of Physics Chalmers University of TechnologyGöteborgSE 41296Sweden

Owing to the utilization of lithium metal as anode with the ultrahigh theoretical capacity density of 3860 mA h g^(-1)and oxide-based ceramic solid-state electrolytes(SE),e.g.,garnet-type Li7La_(3)Zr_(2)O_(12)(LLZO),all-state-state lithium metal batteries(ASLmBs)have been widely accepted as the promising alternatives for providing the satisfactory energy density and ***,its applications are still challenged by plenty of technical and scientific *** this contribution,the co-sintering temperature at 500℃is proved as a compromise method to fabricate the composite cathode with structural integrity and declined capacity fading of LiNi_(0.5)Co_(0.2)mn_(0.3)O_(2)(NCm).On the other hand,it tends to form weaker grain boundary(GB)inside polycrystalline LLZO at inadequate sintering temperature for LLZO,which can induce the intergranular failure of SE during the growth of Li filament inside the unavoidable defect on the interface of ***,increasing the strength of GB,refining the grain to 0.4μm,and precluding the interfacial defect are suggested to postpone the electro-chemo-mechanical failure of SE with weak ***,the advanced sintering techniques to lower the co-sintering temperature for both NCm-LLZO composite cathode and LLZO SE can be posted out to realize the viability of state-of-the-art ASLmBs with higher energy density as well as the guaranteed safety.

关键词： All-solid-state lithium metal battery LiNi_(0.5C)o_(0.2)mn_(0.3)O_(2)-Li7La_(3)Zr_(2)O_(12)composite cathode Co-sintering Lithium metal anode Electro-chemo-mechanical failure

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Design of pyrite/carbon nanospheres as high-capacity cathode for lithium.ion batteries

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Journal of Energy Chemistry 2020年第1期29卷 1-6,I0001页

作者： Qinqin xiong Xiaojing Teng Jingjing Lou Guoxiang Pan Xinhui Xia Hongzhong Chi Xiaoxiao Lu Tao yang Zhenguo Ji College of materials and Environmental Engineering Hangzhou Dianzi UniversityHangzhou 310018Zhejiang.China Department of materials Chemistry Huzhou UniversityHuzhou 313000ZhejiangChina State Key Laboratory of Silicon materials Department of Materials Science&EngineeringZhejiang UniversityHangzhou 310027ZhejiangChina Key Laboratory of Advanced Energy materials Chemistry(ministry of Education) College of ChemistryNankai UniversityTianjin 300071China

Transition metal sulfides are emerging as promising electrode materials for energy storage and *** this work,hierarchical FeS2/C nanospheres are synthesized through a controllable solvothermal method followed by the annealing *** FeS2 core is homogeneously coated by thin carbon *** hierarchical nanostructure and carbon coating can enhance electron transfer and accommodate the stress originated from the volume change as well as suppress the shuttle effect of ***,as the cathode material of lithium.ion batteries(LiBs),the FeS2/C nanospheres exhibit high reversible capacity of 676 m Ahg^-1 and excellent cycling life with the capacity retention of 97.1%after100 *** addition,even at the high current density of 1.8 C,a reversible capacity of 437 m Ahg^-1 is obtained for the FeS2/C nanospheres,demonstrating its great prospect for practical applications in highperformance LiBs.

关键词： iron sulfide Carbon coating Cathode Nanosphere Lithium.ion batteries

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Boosting the polysulfide confinement in B/N–codoped hierarchically porous carbon nanosheets via Lewis acid–base interaction for stable Li–S batteries

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Journal of Energy Chemistry 2020年第12期29卷 90-100页

作者： Dong-Gen xiong Ze Zhang Xiao-Yun Huang Yan Huang Ji Yu Jian-Xin Cai Zhen-Yu yang College of Chemistry Key laboratory of Jiangxi Province for Environment and Energy CatalysisNanchang UniversityNanchang 330031 JiangxiChina

Carbon materials have shown remarkable usefulness in facilitating the performance of insulating sulfur cathode for lithium–sulfur batteries owing to their excellent conductivity and porous structure. However,the anxiety is the poor affinity toward polar polysulfides due to the intrinsic nonpolar surface of ***, we report a direct pyrolysis of the mixture urea and boric acid to synthesize B/N–codoped hierarchically porous carbon nanosheets(B–N–CSs) as efficient sulfur host for lithium–sulfur battery. The graphene–like B–N–CSs provides high specific surface area and porous structure with abundant micropores(1.1 nm) and low–range mesopores(2.3 nm), thereby constraining the sulfur active materials within the pores. more importantly, the codoped B/N elements can further enhance the polysulfide confinement through strong Li–N and B–S interaction based on the Lewis acid–base theory. These structural superiorities significantly suppress the shuttle effect by both physical confinement and chemical interaction, and promote the redox kinetics of polysulfide conversion. When evaluated as the cathode host, the S/B–N–CSs composite displays the excellent performance with a high reversible capacity up to 772 m A h g–1 at 0.5 C and a low fading rate of ^0.09% per cycle averaged upon 500 cycles. in particular, remarkable stability with a high capacity retention of 87.1% can be realized when augmenting the sulfur loading in the cathode up to 4.6 mg cm^(-2).

关键词： Lithium–sulfur batteries Porous carbon nanosheets B/N–codoped Lewis acid–base Bimodal–pore structure

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Synthesis and Characterization of a 42-membered macrocyclic Compound C_(40)H_(46)N_6O_4 with [2+2] Condensation

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Chinese Journal of Structural Chemistry 2003年第5期22卷 553-557页

作者： mAZhen LiUShi-xiong CentralLaboratory FuzhouUniversityFuzhou350002China StateKeyLaboratoryofStructuralChemistry FujianInstituteofResearchontheStructureofMatterTheChineseAcademyofSciencesFuzhou350002China

The title compound 1,4,23,26,29,48-hexaaza-6,9:16,19:31,34:41,44-tetrabenzo-12, 15,37,40-tetraoxa-cyclodotetracontane-4,5,18,19,25,26,39,40-octaene 1 (C40H46N6O4) was synthe- sized by [2+2] condensation of diethylenetriamine with 4,4?diformyl-diphenoxyethane (dialdehyde) in a mixed solvent of ethanol and tetrahydrofuran. The crystal data are: mr = 674.83, triclinic, P, a = 5.8249(1), b = 9.4114(8), c = 17.649(2) ? a = 79.310(7), b = 85.397(4), g = 78.970(8), V = 932.1(1) ?, Z = 1, Dc = 1.202 g/cm3, F(000) = 360, m(moKa) = 0.079 mm-1, R = 0.0486 and wR = 0.1439. The title molecule has a crystallographic center symmetry. The distance between the two secondary amine nitrogen atoms is 18.890(3) ?

关键词： crystal structure macrocyclic compound condensation

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Hydrocarbon expulsion model and resource potential evaluation of high-maturity marine source rocks in deep basins:Example from the Ediacaran microbial dolomite in the Sichuan Basin,China

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Petroleum Science 2022年第6期19卷 2618-2630页

作者： Wen-yang Wang xiong-Qi Pang Ya-Ping Wang Zhang-Xin Chen Chang-Rong Li Xin-Hua ma State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing 102249China College of Geosciences China University of Petroleum(Beijing)Beijing 102249China Research institute of Exploration and Development Petro China Southwest Oil&Gas Field CompanyChengduSichuan 610041China Chemical and Petroleum Engineering Schulich School of EngineeringUniversity of CalgaryCalgary T2N 1N4Canada School of Earth and Space Sciences Peking UniversityBeijing 100871China Research institute of Petroleum Exploration and Development(RiPED) Petro ChinaBeijing 100083China

Hydrocarbon expulsion features and resource potential evaluation of source rocks are crucial for the petroleum ***-maturity marine source rocks have not exhibited a hydrocarbon expulsion mode owing to the lack of low-maturity source rocks in deep petroliferous *** considered the Ediacaran microbial dolomite in the Sichuan Basin,the largest high-maturity marine gas layer in China,to exhibit a method that quantitatively characterizes the hydrocarbon expulsion of high-maturity marine source *** experiment of fluid inclusion,rock pyrolysis,and vitrinite reflectance(Ro)of 119 microbial dolomite core samples obtained from the Dengying Formation were performed.A hydrocarbon expulsion model of high-maturity source rock was established,and its resource potential was *** results showed that the Ediacaran microbial dolomite in the Sichuan Basin is a good source rock showing vast resource *** hydrocarbon expulsion threshold is determined to be vitrinite reflectance at 0.92%.The hydrocarbon expulsion intensities in the geologic history is high with maximum of 1.6×10^(7)t/km^(2).The Ediacaran microbial dolomite expelled approximately 1.008×10^(12)t of hydrocarbons,and the recoverable resource was 1.5×10^(12)m^(3).The region can be categorized into areasⅠ,Ⅱ,Ⅲ,andⅣ,in decreasing order of hydrocarbon expulsion *** with a higher hydrocarbon expulsion intensity have a lower drilling risk and should be prioritized for exploration in the orderⅠ>Ⅱ>Ⅲ>Ⅳ.Two areas,northern and central parts of Ediacaran in the Sichuan Basin,were selected as prospects which had the drilling priority in the future gas *** production data of 55 drilled wells verified the high reliability of this *** model in this study does not require low-maturity samples and can be used for evaluating high-maturity marine source rocks,which has broad applicability in deep basins worldwide.

关键词： Deep petroliferous basin Overmatured source rocks Hydrocarbon expulsion model Resource evaluation Sichuan basin

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A Bionic Stick–Slip Piezo-Driven Positioning Platform Designed by imitating the Structure and movement of the Crab

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Journal of Bionic Engineering 2023年第6期20卷 2590-2600页

作者： Zhixin yang Xuan Li Jinyan Tang Hu Huang Hongwei Zhao Yiming Cheng Shiwei Liu Chunyu Li maoji xiong Key Laboratory of CNC Equipment Reliability Ministry of EducationSchool of Mechanical and Aerospace EngineeringJilin UniversityChangchun130022JilinChina

By imitating the body structure and movement mode of the crab in nature,a novel stick–slip piezo-driven positioning platform was proposed by employing the bionic flexible hinge mechanism with a symmetrical structure and two piezoelectric *** structural design and bionic motion principle were discussed,followed by analyzing the feasibility,safety,and output magnification ratio of the bionic flexible hinge mechanism via the stiffness matrix method and finite element *** investigate the output performances of the positioning platform,a prototype was fabricated and an experiment system was *** characteristics of the positioning platform under various driving voltages were characterized,and the results indicated that the positioning platform could move steadily under various driving *** 1 s,the differences between the forward and reverse output displacement were less than 3%under different driving frequencies,proving the high bidirectional motion *** maximum driving speed of 5.44 mm/s was obtained under the driving voltage of 120 V and driving frequency of 5 *** addition,the carrying load capacity of the positioning platform was tested by standard weights,and the results showed that when the carrying load reached 10 N,the driving speed could still reach 60μm/s.

关键词： Piezo-driven Stick–slip Bionic design Positioning platform Bidirectional motion symmetry

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A Stiffness-Tunable Composite with Wide Versatility and Applicability Based on Low-melting-Point Alloys

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Journal of Bionic Engineering 2023年第6期20卷 2786-2796页

作者： Jiawei xiong Bo Sun Chunbao Liu Konghua yang Yuchao Luo Yunhong Liang Zhiwu Han Lei Ren Zhaohua Lin School of mechanical and Aerospace Engineering Jilin UniversityChangchun130022China Key Laboratory of Bionic Engineering Ministry of EducationJilin UniversityChangchun130022China Liaoning Academy of materials Shenyang110167China Department of mechanical Aerospace and Civil EngineeringUniversity of ManchesterManchesterM139PLUK

Flexible materials are essential in bionic fields such as soft ***,the lack of stiffness limits the mechanical performance of soft robots and makes them difficult to develop in many extreme working conditions,such as lifting and excavation *** address this issue,we prepared a stiffness-tunable composite by dispersing low-melting-point alloy into thermosetting epoxy resin.A dramatic and rapid change in stiffness was achieved by changing the state of matter at lower temperatures,and accurate control of the composite modulus was achieved by controlling the *** the alloy content is at 30vol%,the tensile modulus changes 41.6 times,while the compressive modulus changes 58.9 *** applying the composite to a flexible actuator,the initial stiffness of the actuator was improved by 124 times,reaching 332 mN/*** addition,the use of stiffness-tunable materials in the wheel allowed for timely changes in the grounding area to improve *** flexible materials with manageable mechanical properties have wide applicability in fields including bionics,robotics,and *** findings provide a new approach to designing and developing flexible materials with improved stiffness and controllability.

关键词： Stiffness-tunable composite manageable mechanical properties Flexible actuator

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The role of m6A modification in the biological functions and diseases

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Signal Transduction and Targeted Therapy 2021年第3期6卷 763-778页

作者： Xiulin Jiang Baiyang Liu Zhi Nie Lincan Duan Qiuxia xiong Zhixian Jin Cuiping yang Yongbin Chen Key Laboratory of Animal models and Human Disease mechanisms of Chinese Academy of Sciences&Yunnan Province Kunming Institute of Zoology650223 KunmingYunnanChina Kunming College of Life Science University of Chinese Academy of Sciences100049 BeijingChina Kunming medical University 650500 KunmingChina Center for Excellence in Animal Evolution and Genetics Chinese Academy of Sciences650223 KunmingYunnanChina

N6-methyladenosine(m6A)is the most prevalent,abundant and conserved internal cotranscriptional modification in eukaryotic RNAs,especially within higher eukaryotic cells.m6A modification is modified by the m6A methyltransferases,or writers,such as mETTL3/14/16,RBm15/15B,ZC3H3,ViRmA,CBLL1,WTAP,and KiAA1429,and,removed by the demethylases,or erasers,including FTO and *** is recognized by m6A-binding proteins YTHDF1/2/3,YTHDC1/2 iGF2BP1/2/3 and HNRNPA2B1,also known as"readers".Recent studies have shown that m6A RNA modification plays essential role in both physiological and pathological conditions,especially in the initiation and progression of different types of human *** this review,we discuss how m6A RNA methylation influences both the physiological and pathological progressions of hematopoietic,central nervous and reproductive *** will m.inly focus on recent progress in identifying the biological functions and the underlying molecular mechanisms of m6A RNA methylation,its regulators and downstream target genes,during cancer progression in above *** propose that m6A RNA methylation process offer potential targets for cancer therapy in the future.

关键词： m6A diseases removed

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Novel roll effector based on zero-mass-flux dual synthetic jets and its flight test

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Chinese Journal of Aeronautics 2022年第8期35卷 1-6页

作者： Zhenbing LUO Zhijie ZHAO Jiefu LiU xiong DENG mu ZHENG Hang yang Qingyang CHEN Shiqing Li College of Aeronautics and Astronautics National University of Defense TechnologyChangsha 410073China

The autonomous and controllable Dual Synthetic Jet Actuator(DSJA)is firstly integrated into the Unmanned Aerial Vehicle(UAV),and flight tests without the deflection of rudders are carried out to verify the viability of DSJA to control the attitudes of UAV during *** is improved into an actuator with two diaphragms and three cavities,which has higher energy ***,differentially distributed on both sides of the wings,are installed on the trailing edge close to the wing *** tests,containing Differential Circulation Control(DCC)using double-side actuators,Positive Circulation Control(PCC)using left-side actuators and Negative Circulation Control(NCC)using right-side actuators,are implemented at cruising speed of 25 m/*** show that roll attitude control without rudders could be realized by *** and NCC can generate the rightward roll and yaw angular velocity,prompting UAV to turn *** stronger controlling ability can be achieved by DCC,with the maximum roll angular velocity of 15.62(°)/*** can generate a rightward roll moment,but a leftward yaw moment will be produced at the same *** yaw induces the leftward rolling moment,which weakens the roll control effect,making UAV keep to yaw to the left with a small slope.

关键词： Active flow control Actuators with two diaphragms and three cavities Circulation control Dual synthetic jets Flight test Roll attitude control

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