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Understanding the spatial interaction of ultrasounds based on three-dimensional dual-frequency ultrasonic field numerical simulation

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China Foundry 2024年第1期21卷 29-43页

作者： zhao-yang yin Qi-chi Le Yan-chao Jiang Da-zhi zhao Qi-yu Liao Qi Zou Key Lab of Electromagnetic Processing of Materials Ministry of EducationNortheastern UniversityShenyang 110819China School of Materials Science and Engineering Northeastern UniversityShenyang 110819China

A transient 3D model was established to investigate the effect of spatial interaction of ultrasounds on the dual-frequency ultrasonic field in magnesium alloy *** effects of insertion depth and tip shape of the ultrasonic rods,input pressures and their ratio on the acoustic field distribution were discussed in ***,the spacing,angle,and insertion depth of two ultrasonic rods significantly affect the interaction between distinct *** a result,various acoustic pressure distributions and cavitation regions are *** spherical rods mitigate the longitudinal and transversal attenuation of acoustic pressure and expand the cavitation volume by 53.7%and 31.7%,respectively,compared to the plate and conical *** the input pressure will enlarge the cavitation region but has no effect on the acoustic pressure distribution *** acoustic pressure ratio significantly affects the pressure distribution and the cavitation region,and the best cavitation effect is obtained at the ratio of 2:1(P15:P20).

关键词： dual-frequency ultrasonic numerical model acoustic pressure spatial interaction magnesium alloy

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New model of linkage evolution for the transtensional fault systems in the Nanpu Sag of Bohai Bay Basin: Insight from seismic interpretation and analogue modelling

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Petroleum Science 2024年第4期21卷 2287-2310页

作者： Yu-Heng Wang Fu-Sheng Yu Bao-yin zhao Ling-Jian Meng College of Geosciences China University of Petroleum (Beijing) State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum (Beijing) Jidong Oilfield Company PetroChina Limited Company

The evolution of faults within the same stress field is frequently influenced by numerous factors,involving the reactivation of pre-existing structures, stress transmission through ductile detachment layers, and the growth, interaction, as well as linkage of new fault segments. This study analyses a complex multi-phase oblique extension fault system in the Nanpu Sag(NPS) of the Bohai Bay Basin(BBB),China. High-resolution three-dimensional(3D) seismic data and analogue modelling indicate that the oblique extensional reactivation of pre-existing structures governs the sequential arrangement of fault segments in the caprock, and they dip synthetically to the reactivated fault at depth. During the NW-SE extension in the Eocene, the predominant movement of the pre-existing fault is strike-slip. Subsequently,during the N-S extension since the Oligocene, inclined at *** the pre-existing fault, forming splay fault segments and ultimately creating large en-echelon arcuate faults linked by relay ramps. Using fault throw-distance(T-D) and laser scanning, we reconstructed the fault evolution model of oblique extension reactivation in the presence of a ductile detachment basement. Our study illustrates that the arcuate faults can be categorized into linear master fault segments controlled by pre-existing structures, bending splay faults in the termination zone, and normal fault segments responding to the regional stress *** interaction between faults occurs among normal faults and strike-slip faults, and the kinematic unification of the two fault systems is accomplished in the intersection zone. As the faults continue to evolve, the new fault segments tend to relinquish the control of pre-existing structures and concentrate more on the development of planar and continuous major faults. The ductile detachment layer significantly contributes to the uniform distribution of strain, resulting in narrow shear zones and discontinuous normal faults in its absence.

关键词： Analogue modelling Transtensional deformation Fault linkage Fault intersection zone Nanpu Sag of Bohai Bay basin

Advances of high-performance LiNi_(1-x-y)Co_(x)M_(y)O_(2) cathode materials and their precursor particles via co-precipitation process

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Particuology 2024年第3期86卷 67-85页

作者： Wenbiao Liang yin zhao Liyi Shi Zhuyi Wang Yi Wang Meihong Zhang Shuai Yuan School of Materials Science and Engineering Shanghai UniversityShanghai200444China Research Center of Nanoscience and Nanotechnology Shanghai UniversityShanghai200444China Emerging Industries Institute Shanghai UniversityJiaxingZhejiang314006China

Layered LiNi_(1-x-y)Co_(x)M_(y)O_(2)(M=Mn or Al)is a promising cathode material for lithium-ion batteries due to its high specific capacity and acceptable manufacturing ***,the polycrystalline LiNi_(1-x-y)Co_(x)M_(y)O_(2) cathode material suffers from disordered orientation of primary particles and poor geometric symmetry of secondary particles,which severely hampers the migration of Lit ***,the resulting anisotropy accelerates the disintegration of the secondary particle structure,significantly affecting the electrochemical performance of the polycrystalline *** spite of less grain boundary,the single-crystal LiNi_(1-x-y)Co_(x)M_(y)O_(2) cathodes still suffer from severe microcracks generated by repeated planar gliding during cycling,which poses a great challenge to the cycling stability of single-crystal ***'s worth noting that the microstructure of the cathode material is mainly inherited from its ***,it is necessary to deeply understand the influence of the microstructure of Ni_(1-x-y)Co_(x)M_(y)(OH)2 on the electrochemical properties of LiNi_(1-x-y)Co_(x)M_(y)O_(2) cathode materials,so as to optimize the production process of preparing high-performance cathode *** this review,we summarize recent advances in the research and development of Ni-rich cathode precursor ***,the challenges faced by the Ni-rich hydroxide precursor materials are presented,including the effect of primary particle morphology and arrangement on the electrochemical performance of cathode materials,the influence of secondary particle morphology on lithium insertion reactions in cathode,and the effect of particle size on the microcracking of single-crystal ***,the presentation of the conventional co-precipitation reactor,the mechanism of precursor particle growth,and the influence of coprecipitation parameters are described in ***,the strategies are systematically discussed to solve the cha

关键词： Lithium-ion batteries Cathode materials Co-precipitation Ni-rich layered oxides Single crystal Precursor particles

Relationship between physical activity and specific working memory indicators of depressive symptoms in university students

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World Journal of Psychiatry 2024年第1期14卷 148-158页

作者： Qun zhao Xing Wang Shu-Fan Li Peng Wang Xiang Wang Xin Xin Suo-Wang yin zhao-Song yin Li-Juan Mao School of Physical Education Shanghai University of SportShanghai 200438China Department of Physical Education Donghua UniversityShanghai 201620China

BACKGROUND The detection rate of depression among university students has been increasing in recent years,becoming one of the main psychological diseases that endangers their physical and mental *** to statistics,self-harm and suicide,for which there is no effective intervention,are the second leading causes of *** To explore the relationship between different elements and levels of physical activity and college students’depression-symptom-specific working memory *** Of 143 college students were analyzed using the Beck Depression Self-Rating Scale,the Physical Activity Rating Scale,and the Working Memory *** There was a significant difference between college students with depressive symptoms and healthy college students in completing verbal and spatial working memory(SWM)tasks correctly(all P0.05).CONCLUSION An increase in physical exercise among college students,particularly medium-and high-intensity exercise and exercise of 30 min or more,can improve the correct rate of completing working memory tasks.

关键词： Physical activity Depression symptoms University students Working memory

Effect of Artificial Cooling Extrusion on Microstructure and Mechanical Properties of Mg–Zn–Y Alloys

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Acta Metallurgica Sinica(English Letters) 2024年第7期37卷 1115-1127页

作者： Qi-Yu Liao Da-Zhi zhao Qi-Chi Le Wen-Xin Hu Yan-Chao Jiang Wei-Yang Zhou Liang Ren Dan-Dan Li zhao-Yang yin School of Materials Science and Engineering Northeastern UniversityShenyang110819China Key Laboratory of Electromagnetic Processing of Materials Ministry of EducationNortheastern UniversityShenyang110819China Key Laboratory of Lightweight Structural Materials Liaoning ProvinceNortheastern UniversityShenyang110819China Baotou Research Institute of Rare Earths Baotou014000China

Microstructure and mechanical properties of Mg–Zn–Y alloys with different Zn/Y atomic ratios with or without artificial cooling (AC) extrusion were systematically investigated in this work. The results show that bimodal microstructure consisting of submicron dynamic recrystallized (DRXed) grains with high fraction of low-angle grain boundaries (LAGBs) and elongated unDRXed grains was formed in Mg_(98.7)Zn_(1)Y_(0.3) alloy with AC extrusion. The AC process effectively limits the growth of precipitated phases, and large amount of nanoscale precipitates were dynamically precipitated during the extrusion process. AC extrusion could effectually refine the lamellar 14H LPSO phases and inhibit the transition from stacking faults to LSPO phases in Mg_(98)Zn_(1)Y_(1) alloy and the narrow LPSO phase in Mg_(98)Zn_(1)Y_(1)-AC alloy which could promote the nucleation of DRXed grains. The AC extrusion significantly improves the strength of Mg–Zn–Y alloys. Owing to AC extrusion, the strength improvement of Mg_(98.7)Zn_(1)Y_(0.3) alloy is mainly attributed to fine grain strengthening, dislocation strengthening, and nano-phases precipitation strengthening. After AC process, more fine grains and nano-phases jointly strengthen the Mg_(98)Zn_(1)Y_(1) alloy. The Mg_(98)Zn_(1)Y_(1) alloy obtains optimal mechanical properties after extrusion at 623 K, with ultimate tensile strength (UTS) of 406 MPa, yield strength (YS) of 388 MPa, and elongation (EL) of 5.6%.

关键词： Mg-Zn-Y Artificial cooling Extrusion Microstructure Mechanical properties

泄露型内幕交易共同违法的认定标准与处断规则

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证券市场导报 2024年第10期 15-26页

作者：赵吟西南政法大学民商法学院重庆401120

实践中,针对泄露型内幕交易的行政执法存在对泄密人处罚的选择性缺失和对泄密人与受密人共同违法认定标准过于严格的问题。这并非证券执法机关主动选择的结果,而是客观上存在因果关系难以认定的困难。鉴于分割审视单纯泄密行为与受密后... 详细信息

实践中,针对泄露型内幕交易的行政执法存在对泄密人处罚的选择性缺失和对泄密人与受密人共同违法认定标准过于严格的问题。这并非证券执法机关主动选择的结果,而是客观上存在因果关系难以认定的困难。鉴于分割审视单纯泄密行为与受密后交易行为不利于全面打击泄露型内幕交易,构建一套严谨、合理的泄露型内幕交易共同违法认定标准与处断规则十分必要。本文借鉴刑法的三阶层体系,在分析泄露型内幕交易共同违法“构成要件该当性”“违法性”和“有责性”三个要素的基础上,认为:在认定环节,应采用“行为共同标准”,将泄密人与受密人的行为作为一个整体进行审视,初步判断是否符合内幕交易的认定条件,进而分析二者行为的结合是否对同时反向交易方的利益造成了损害。在处断环节,应根据“责任主义”原则,分别评估泄密人和受密人的主观意图并进行归责和处罚。

关键词：泄露型内幕交易共同违法责任主义行政处罚

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数据可携权的实现路径:基于开放银行的分析

华东政法大学学报 2024年第2期27卷 67-82页

作者：赵吟西南政法大学民商法学院西南政法大学人工智能法律研究院金融科技法律研究中心

开放银行的核心是数据共享,数据在客户、银行与第三方机构之间移转所产生的权利、义务是开放银行模式下法律关系的主要内容。作为数据移转中客户个人数据控制和保护的方案,数据可携权契合开放银行的应用场景,促进平衡各方利益。《个人... 详细信息

开放银行的核心是数据共享,数据在客户、银行与第三方机构之间移转所产生的权利、义务是开放银行模式下法律关系的主要内容。作为数据移转中客户个人数据控制和保护的方案,数据可携权契合开放银行的应用场景,促进平衡各方利益。《个人信息保护法》相关条文仅确立了数据可携权的大致框架,有待结合开放银行的具体场景明确适用规则。这需要在对权利客体标识化后进行类别判断,厘清数据可携权的权利内容和行使边界,再根据责任性质划分数据控制者应承担的各类责任,基于新业态实现个人数据保护的新诠释。

关键词：数据可携权开放银行数据共享个人数据保护

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Current Status and Prospects of High-Speed Direct-Drive Power Generation Technology

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Journal of Thermal Science 2024年第6期33卷 2097-2116页

作者： JIANG Chenglong yin zhao ZHANG Hualiang ZHOU Peijian LIU Yu CHENG Kun XU Yujie CHEN Haisheng College of Metrology Measurement and Instrument China Jiliang University Nanjing Institute of Future Energy System Institute of Engineering Thermophysics Chinese Academy of Sciences University of Chinese Academy of Sciences

Turbine generators play a pivotal role in efficiently converting gas internal energy into electrical energy,finding extensive applications in diverse green energy and power *** adoption of a high-speed direct-drive structure eliminates mechanical losses associated with the reducer between the turbine and generator,enhancing system efficiency and ***,this configuration introduces challenges in design and *** article explores the various application scenarios of high-speed direct-drive power generation systems,examining their roles in organic Rankine cycle power generation,gas turbine power generation,supercritical CO2power generation,vehicle exhaust turbine power generation,and natural gas pressure reduction power *** the high-speed,high-pressure,high-temperature,and high-efficiency challenges in turbine power generation systems,the key technologies are reviewed including high-speed bearings,rotor dynamics,high-speed motors,high-frequency variable frequency technology,sealing technology,axial force adjustment,thermal management,turbine aerodynamic design,and system control *** article further delves into the current research and development status of high-speed direct-drive power generation systems across different application ***,the article presents prospects for the future development of efficient,reliable and widely adaptable high-speed direct-drive generators,offering valuable insights for researchers and practitioners in the field.

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股东共同回购责任承担的司法审视——基于股权回购型对赌协议的实证分析

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法治研究 2024年第5期155卷 79-89页

作者：赵吟西南政法大学民商法学院

在股权回购型对赌协议纠纷中,如果合同未明确约定多个股东履行回购义务的方式,法院判决呈现出连带责任、共同责任和按份责任三种不同的结果。法院的判决理由虽能体现分析案件事实和适用法律规范的合理性,但存在不同程度的疏漏,导致投资... 详细信息

在股权回购型对赌协议纠纷中,如果合同未明确约定多个股东履行回购义务的方式,法院判决呈现出连带责任、共同责任和按份责任三种不同的结果。法院的判决理由虽能体现分析案件事实和适用法律规范的合理性,但存在不同程度的疏漏,导致投资人实现债权面临阻碍。在我国《民法典》框架下,结合新《公司法》的立场,法院应科学识别对赌协议中的要素特征,根据合同具体内容判断市场主体所求,据此认定连带责任或者按份责任,并根据责任承担方式选择执行方案。此司法路径的完善不仅有助于形成相对统一的结论,也有助于落实商事审判的理念要求。

关键词：对赌协议共同回购股东义务责任承担司法路径

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