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Imaging the western boundary of the Sichuan Craton from multiple geophysical observations

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Journal of Earth Science 2024年

作者： Qihang Yin Xi Xu Xiaodong Yang Xuhua Shi Lei wu Andrew V.Zuza Liu Yang Hefeng Tian Yuanhai Shu Shufeng Yang Nevada Bureau of Mines and Geology， University of Nevada China Aero Geophysical Survey and Remote Sensing Center for Natural Resources，China Geological Survey School of Earth Sciences， Zhejiang University Research Center for Structures in Oil and Gas Bearing Basins， Ministry of Education Key Laboratory of Ocean and Marginal Sea Geology， South China Sea Institute of Oceanology， Innovation Academy of South China Sea Ecology and Environmental Engineering， Chinese Academy of Sciences School of Mechanical and Electrical Engineering， Hubei Open University

The boundary between the cratonic and orogenic lithospheres is one of the most significant seismogenic zones characterized by strong lithospheric deformation. As the essential tectonic block bounding the eastern Tibetan Plateau， the Sichuan Craton (SCC) resists the eastward escape of Plateau’s crustal materials， resulting in the uplift of the Songpan-Ganzi Block (SGB) and the crustal deformation of the Longmenshan tectonic belt (LMTB). To uncover the compressional structures and deformational mode of the LMTB and SCC， it is crucial to determine the precise location and geometry of the western boundary of the SCC. To address this issue， the lithospheric properties of the obduction SGB， the underthrusting SCC， and the LMTB were analyzed using a series of geophysical data， including seismic reflection profiles， magnetotellurics， aeromagnetics， gravity， and seismic tomography. The crust of the SGB is characterized by low magnetism， low seismic velocity， low resistivity and low Bouguer gravity， while that of the SCC features non-uniform high magnetism， high seismic velocity， high resistivity and high Bouguer gravity. The LMTB， as the boundary between the SGB and SCC， shows the geophysical characteristics similar to the SCC along the southern and central segments. The integration of all these geophysical observations suggests that the SCC’s western boundary follows the Yingxiu-Beichuan fault along the northern segment， without obvious underthrust. However， this boundary is located west of the Wenchuan-Maoxian fault zone along the southern and central segments， with distinct westward wedging/underthrusting. The irregular geometry of the SCC’s western boundary can further explain the variation in structural deformation along the LMTB. By comparing the differences in crustal thickness and lithospheric strength between the SGB and SCC， this study suggests that the varying crustal strength between tectonic blocks may be the controlling factor for the irregular geometry of the

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The FRB-searching Pipeline of the Tianlai Cylinder Pathfinder Array

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Research in Astronomy and Astrophysics 2024年第8期24卷 113-132页

作者： Zijie Yu Furen Deng Shijie Sun Chenhui Niu Jixia Li Fengquan wu Wei-Yang Wang Yougang Wang Shifan Zuo Lin Shu Jie Hao Xiaohui Liu Reza Ansari Ue-Li Pen Albert Stebbins Peter Timbie Xuelei Chen National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Radio Astronomy and Technology Chinese Academy of ScienceBeijing 100101China Institute of Astrophysics Central China Normal UniversityWuhan 430079China Institute of Automation Chinese Academy of SciencesBeijing 100190China Guangdong Institute of Artificial Intelligence and Advanced Computing Guangzhou 510535China UniversitéParis-Saclay CNRS/IN2P3IJCLab91405 OrsayFrance Institute of Astronomy and Astrophysics Academia SinicaRoosevelt RoadTaipei 10617TaiwanChina Canadian Institute for Theoretical Astrophysics University of Toronto60 Saint George StreetTorontoON M5S 3H8Canada Department of Physics University of Wisconsin-MadisonMadisonWI 53706USA Fermi National Accelerator Laboratory P.O.Box 500Batavia IL 60510-5011USA Department of Physics College of SciencesNortheastern UniversityShenyang 110819China Center of High Energy Physics Peking UniversityBeijing 100871China

This paper presents the design,calibration,and survey strategy of the Fast Radio Burst(FRB)digital backend and its real-time data processing pipeline employed in the Tianlai Cylinder Pathfinder *** array,consisting of three parallel cylindrical reflectors and equipped with 96 dual-polarization feeds,is a radio interferometer array designed for conducting drift scans of the northern celestial *** FRB digital backend enables the formation of 96 digital beams,effectively covering an area of approximately 40 square degrees with the 3 dB *** pipeline demonstrates the capability to conduct an automatic search of FRBs,detecting at quasi-realtime and classifying FRB candidates *** current FRB searching pipeline has an overall recall rate of88%.During the commissioning phase,we successfully detected signals emitted by four well-known pulsars:PSR B0329+54,B2021+51,B0823+26,and B2020+*** report the first discovery of an FRB by our array,designated as FRB *** also investigate the optimal arrangement for the digitally formed beams to achieve maximum detection rate by numerical simulation.

关键词： instrumentation interferometers-methods data analysis-(stars )pulsars general-telescopes

七巧板原理在可拆卸式皮革包袋造型设计中的应用

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皮革科学与工程 2024年第2期34卷 77-83页

作者：郑好吴晶吴芳刘文庆四川大学轻工科学与工程学院四川成都610015

七巧板是由七块不同形状的几何图块组成,以各种不同的拼凑方法可以拼搭出千变万化的形象图案,被广泛应用在设计领域中。通过分析七巧板面积与边长可互为替代的原理,总结可拆卸式皮革包袋的设计特点,将包袋解构为七巧板的几何图块,利用... 详细信息

七巧板是由七块不同形状的几何图块组成,以各种不同的拼凑方法可以拼搭出千变万化的形象图案,被广泛应用在设计领域中。通过分析七巧板面积与边长可互为替代的原理,总结可拆卸式皮革包袋的设计特点,将包袋解构为七巧板的几何图块,利用魔术贴的连接性能,结合拆卸、重组与拼接转换的方法,将七巧板的基础图块进行创意组合。实验结果表明,运用七巧板的组合性和互动性,可组合出18种可拆卸式皮革包袋的外观造型,为可拆卸式皮革包袋的创新设计提供了思路。

关键词：七巧板原理可拆卸式皮革包袋造型设计

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Lattice-mismatch-induced formation of defect-rich Pd–Cu alloy nanocages for enhanced formic acid oxidation activity

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Science China Chemistry 2024年

作者： Zhaojun Liu Zhengyan Wang Zhaoyu Wang Hao Yuan Yuke Bai Xiaoxiao Wang Zerui Mu Chunxia wu Kai Liu Zhun Hu Chuanbo Gao Sate Key Laboratory of Multiphase Flow in Power Engineering Frontier Institute of Science and Technology Xi'an Jiaotong University Institute of Industrial Catalysis School of Chemical Engineering and Technology Xi'an Jiaotong University

Crystallographic defects in noble metal nanocrystals are recognized as highly active catalytic sites, significantly enhancing activities in many important reactions. Despite their importance, synthesizing noble metal nanocrystals with a high density of defects poses a considerable synthetic challenge. Here, we present a novel lattice mismatch-induced formation mechanism to create high-density defects in noble metal nanocrystals. This approach takes advantage of lattice mismatch to enable nonepitaxial nucleation and growth of a noble metal on a foreign metal substrate, forming abundant noble metal crystallites with random lattice orientations not dictated by the substrate lattice. As these crystallites grow extensively, they merge, forming numerous grain boundaries and yielding defect-rich noble metal nanocrystals. Defect-rich alloy nanocrystals can also be synthesized through a subsequent vacancy-diffusion alloying process. We take defective PdCu alloy nanocages as an example and demonstrate the effectiveness of crystallographic defects in enhancing catalytic performance of noble metal *** nanocages exhibit superior activity in the electrocatalytic formic acid oxidation reaction, which is 1.6 times greater than their defect-free counterparts. Our strategy offers a new avenue for creating defect-rich noble metal nanocrystals as highly efficient catalysts for a wide array of catalytic applications.

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Microscopic Magnetism of Nickel-Based Infinite-Layer Superconducting Parent Compounds RNiO_(2)(R=La,Nd):AμSR Study

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Chinese Physics Letters 2024年第9期41卷 133-139页

作者： Qiong wu Ying Fu Le Wang Xuefeng Zhou Shanmin Wang Zihao Zhu Kaiwen Chen Chengyu Jiang Toni Shiroka Adrian D.Hillier Jia-Wei Mei Lei Shu State Key Laboratory of Surface Physics Department of PhysicsFudan UniversityShanghai 200438China Department of Physics Southern University of Science and TechnologyShenzhen 518055China Shenzhen Institute for Quantum Science and Engineering and Department of PhysicsSouthern University of Science and TechnologyShenzhen 518055China Laboratory for Muon-Spin Spectroscopy Paul Scherrer InstituteCH-5232 Villigen PSISwitzerland Laboratorium fur Festkorperphysik ETH ZurichCH-8093 ZurichSwitzerland ISIS Facility STFC Rutherford Appleton LaboratoryChiltonDidcotOxfordshireOX110QXUnited Kingdom Shanghai Research Center for Quantum Sciences Shanghai 201315China

By using muon spin relaxation(μSR)measurements,we perform a comparative study of the microscopic magnetism in the parent compounds of infinite-layer nickelate superconductors RNiO_(2)(R=La,Nd).In either compound,the zero-fieldμSR spectra down to the lowest measured temperature reveal no long-range magnetic *** LaNiO_(2),short-range spin correlations appear below T=150 K,and spins fully freeze below T∼10 ***_(2)exhibits a more complex spin dynamics driven by the Nd 4𝑓and Ni3d electron spin ***,it shows features suggesting the proximity to a spin-glass state occurring below T=5 *** both compounds,the spin behavior with temperature is further confirmed by longitudinal-fieldμSR *** results provide new insight into the magnetism of the parent compounds of the superconducting nickelates,crucial to understanding the microscopic origin of their superconductivity.

关键词： order. nickel relaxation

高精度X射线荧光光谱法在含铜污泥Cu离子测定中的应用

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应用化学 2024年第9期41卷 1307-1314页

作者：王莹武瑞平吕梁学院化工与材料工程系吕梁033000 吕梁学院碳基新材料及零碳负碳利用技术研究所吕梁033000

测量含铜污泥中铜离子(Cu^(2+))的浓度、分布是回收Cu^(2+)的必要步骤。因此,研究高精度X射线荧光光谱法在含铜污泥Cu^(2+)测定中的应用十分重要。利用高精度X射线荧光光谱法对山西中条山洞沟铜矿区含铜污泥Cu^(2+)测定进行了研究,以解... 详细信息

测量含铜污泥中铜离子(Cu^(2+))的浓度、分布是回收Cu^(2+)的必要步骤。因此,研究高精度X射线荧光光谱法在含铜污泥Cu^(2+)测定中的应用十分重要。利用高精度X射线荧光光谱法对山西中条山洞沟铜矿区含铜污泥Cu^(2+)测定进行了研究,以解决因干扰所导致测定结果偏差问题。脉冲高度分析器(PHA)范围为100~300的测定条件下,利用高精度X射线荧光光谱法测定熔融片中Cu^(2+)浓度并修正。结果表明:基于X射线荧光光谱图,测量出36个采样点样本中,Cu^(2+)浓度范围从最低的8.78 mg/kg到最高的334.98 mg/kg,并通过绘制的Cu^(2+)浓度分布特征图,得出Cu^(2+)浓度在东南方分布最高,之后逐渐向着西北方向递减,显示出含铜污泥中Cu^(2+)浓度的广泛变化。

关键词：高精度X射线荧光光谱法含铜污泥 Cu2+测定

Effect of Heat Treatment on Microstructure and Mechanical Properties of Multiscale SiC_p Hybrid Reinforced 6061 Aluminum Matrix Composites

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Journal of wuhan University of Technology(Materials Science) 2024年第1期39卷 174-181页

作者：吴健铭许晓静 ZHANG Xu LUO Yuntian LI Shuaidi HUANG Lin Institute for Advanced Manufacturing and Modern Equipment Technology Jiangsu UniversityZhenjiang 212013China

The performance of solid solution aging treatment on aluminum matrix composites prepared by powder metallurgy and reinforced with 6061 aluminum alloy powder as matrix;meanwhile, nano silicon carbide particles(nm Si Cp), submicron silicon carbide particles(1 μm Si Cp) and Ti particles were studied. The Al/Si Cp composite powder was prepared by high-energy ball milling, and then cold-pressed, sintered, hotextruded, and then heat-treated with different solution temperatures and aging times for the extruded composites. Optical microscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy(EDS), X-ray diffractometer(XRD) and extrusion testing were used to analyze and test the microstructure and mechanical properties of aluminum matrix composites. The results show that after the multi-stage solid solution at 530 ℃×2 h+535 ℃×2 h+540 ℃×2 h, the particles are mainly equiaxed grains and uniformly distributed. There is no reinforcement agglomeration, and the surface is dense and the insoluble phase is basically dissolved. In the matrix, the strengthening effect is good, and the hardness and compressive strength are 179.43 HV and 680.42 MPa, respectively. Under this solution process, when the aluminum matrix composites are aged at 170 ℃ for 10 h, the hardness and compressive strength can reach their peaks and increase to 195.82 HV and 721.48 MPa, respectively.

关键词： aluminum matrix composites Si C particles multiscale hybrid enhancement heat treatment mechanical properties

Hepatitis B virus core protein as a Rab-GAP suppressor driving liver disease progression

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Science Bulletin 2024年第16期69卷 2580-2595页

作者： Yu Su Fan Bu Yuanfei Zhu Le Yang Qiong wu Yuan Zheng Jianjin Zhao Lin Yu Nan Jiang Yongxiang Wang Jian wu Youhua Xie Xinxin Zhang Yueqiu Gao Ke Lan Qiang Deng Key Laboratory of Medical Molecular Virology(MOE/NHC/CAMS) School of Basic Medical SciencesShanghai Institute of Infectious Disease and BiosecurityFudan UniversityShanghai 200032China Shanghai Frontiers Science Center of Pathogenic Microorganisms and Infection Fudan UniversityShanghai 200032China Department of Infectious Diseases Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghai 200025China Laboratory of Cellular Immunity Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese MedicineShanghai 201203China State Key Laboratory of Virology College of Life SciencesWuhan UniversityWuhan 430072China

Chronic hepatitis B virus(HBV)infection can lead to advanced liver ***,we establish a transgenic murine model expressing a basic core promoter(BCP)-mutated HBV *** previous studies on the wild-type virus,the BCP-mutated HBV transgenic mice manifest chronic liver injury that culminates in cirrhosis and tumor development with ***,agonistic anti-Fas treatment induces fulminant hepatitis in these mice even at a negligible *** the BCP mutant exhibits a striking increase in HBV core protein(HBc)expression,we posit that HBc is actively involved in hepatocellular ***,HBc interferes with Fis1-stimulated mitochondrial recruitment of Tre-2/Bub2/Cdc16 domain family member 15(TBC1D15).HBc may also inhibit multiple Rab GTPase-activating proteins,including Rab7-specific TBC1D15 and TBC1D5,by binding to their conserved catalytic *** cells under mitochondrial stress,HBc thus perturbs mitochondrial dynamics and prevents the recycling of damaged ***,sustained HBc expression causes lysosomal consumption via Rab7 hyperactivation,which further hampers late-stage autophagy and substantially increases apoptotic cell ***,we show that adenovirally expressed HBc in a mouse model is directly cytopathic and causes profound liver injury,independent of antigen-specific immune *** findings reveal an unexpected cytopathic role of HBc,making it a pivotal target for HBV-associated liver disease *** BCP-mutated HBV transgenic mice also provide a valuable model for understanding chronic hepatitis B progression and for the assessment of therapeutic strategies.

关键词： Apoptosis Basic core promoter Mitophagy Rab7 Transgenic mice

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World Journal of Clinical Cases 2024年第24期12卷 5589-5595页

作者： Zhi-Nian wu Ru JI Ying Xiao Ya-Dong Wang Cai-Yan Zhao Department of Infectious Diseases The Hebei Medical University Third HospitalShijiazhuang 050051Hebei ProvinceChina

BACKGROUND The complexity of immunoglobulin G4(IgG4)-related diseases and their potential connection to hematologic malignancies remains *** article provided a review of the diagnosis and treatment of a patient with IgG4-related sclerosing cholangitis(SC)and essential thrombocythemia(ET),along with an analysis of relevant literature to enhance comprehension of this *** SUMMARY A 56-year-old male was admitted to two hospitals with deteriorating jaundice and pruritus prior to *** our expectations,the patient was first diagnosed with IgG4-SC and ET with the Janus kinase 2 V617F ***,the administration of acetate prednisone significantly resulted in improvements in both IgG4-SC and *** need to pay attention to immune disorders and inflammation as they contribute to the development of various disease *** When IgG4-SC is suspected without histopathological evidence,diagnostic therapy and long-term regular follow-up can lead to positive treatment *** should be mindful of the potential presence of concurrent hematologic diseases in patients with immune disorders.

关键词： Immunoglobulin G4-related sclerosing cholangitis Essential thrombocythemia Autoimmune pancreatitis Janus kinase 2 mutation Glucocorticoids Case report