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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

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

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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

Delivery room resuscitation intensity and associated neonatal outcomes of 24^(+0)-31^(+6) weeks'preterm infants in China:a retrospective cross-sectional study

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World Journal of Pediatrics 2024年第1期20卷 64-72页

作者： Si-Lu Wang Chun Chen Xin-Yue Gu zhao-Qing yin Le Su Si-Yuan Jiang Yun Cao Li-Zhong Du Jian-Hua Sun Jiang-Qin Liu Chuan-Zhong Yang Department of Neonatology Shanghai Key Laboratory of Maternal Fetal MedicineShanghai Institute of Maternal-Fetal Medicine and Gynecologic OncologyShanghai First Maternity and Infant HospitalSchool of MedicineTongji UniversityNo.2699Gaoke Western RoadPudong DistrictShanghai 201204China Department of Neonatology Affiliated Shenzhen Maternity and Child Healthcare HospitalSouthern Medical UniversityNo.2004Hongli RoadFutian DistrictShenzhen 518028China NHC Key Laboratory of Neonatal Diseases Fudan UniversityChildren's Hospital of Fudan UniversityShanghaiChina Department of Neonatology People's Hospital of DehongKunming Medical UniversityDehongChina Department of Neonatology Children's Hospital of Fudan UniversityShanghaiChina Department of Neonatology Children's HospitalZhejiang University School of MedicineHangzhouChina Department of Neonatology Shanghai Children's Medical CenterSchool of MedicineShanghai Jiao Tong UniversityShanghaiChina

Background The aim of this study was to review current delivery room(DR)resuscitation intensity in Chinese tertiary neonatal intensive care units and to investigate the association between DR resuscitation intensity and short-term outcomes in preterm infants born at 24+0_31+6 weeks gestation age(GA).Methods This was a retrospective cross-sectional *** source population was infants born at 24+0_31+6 weeks'GA who were enrolled in the Chinese Neonatal Network 2019 *** infants were categorized into five groups:(1)regular care;(2)oxygen supplementation and/or continuous positive airway pressure(O2/CPAP);(3)mask ventilation;(4)endotracheal intubation;and(5)cardiopulmonary resuscitation(CPR).The association between DR resuscitation and shortterm outcomes was evaluated by inverse propensity score-weighted logistic *** Of 7939 infants included in this cohort,2419(30.5%)received regular care,1994(25.1%)received O,/CPAP,1436(18.1%)received mask ventilation,1769(22.3%)received endotracheal intubation,and 321(4.0%)received CPR in the *** maternal age and maternal hypertension correlated with a higher need for resuscitation,and antenatal steroid use tended to be associated with a lower need for resuscitation(P<0.001).Severe brain impairment increased significantly with increasing amounts of resuscitation in DR after adjusting for perinatal *** strategies vary widely between centers,with over 50%of preterm infants in eight centers requiring higher intensity *** Increased intensity of DR interventions was associated with increased mortality and morbidities in very preterm infants in *** is wide variation in resuscitative approaches across delivery centers,and ongoing quality improvement to standardize resuscitation practices is needed.

关键词： Cardiopulmonary resuscitation Delivery room Endotracheal intubation Neonatal resuscitation Preterm

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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黄土微观结构优先连通模型及其对优先渗流的意义

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岩土力学 2024年第6期45卷 1709-1719页

作者：潘网生赵恬茵李鑫黔南民族师范学院旅游与资源环境学院贵州都匀558000 石家庄铁道大学土木工程学院河北石家庄050043

开展黄土微观结构研究有助于揭示宏细观黄土体渗流、黄土滑坡滑动面形成机制和过程。构建了含裂隙和不含裂隙两类黄土微观结构连通模型,探讨了孔隙连通率p、孔隙变异系数λ、裂隙最大跨度ω及裂隙网络贯通率q等参数之间的关系,并通过黄... 详细信息

开展黄土微观结构研究有助于揭示宏细观黄土体渗流、黄土滑坡滑动面形成机制和过程。构建了含裂隙和不含裂隙两类黄土微观结构连通模型,探讨了孔隙连通率p、孔隙变异系数λ、裂隙最大跨度ω及裂隙网络贯通率q等参数之间的关系,并通过黄土微观结构扫描式电子显微镜试验和野外渗流试验对两类模型的连通阈值进行了验证。结果表明:裂隙的存在,特别是其跨度大小,对黄土孔隙形态大小及其分布特征具有重要影响;裂隙是优先流的重要通道,是较低孔隙率条件下发生黄土优先流的重要原因;黄土微观结构优先连通模型研究结论与黄土渗流试验结论基本吻合,揭示了泾阳南塬“漫灌式”灌溉行为对含裂缝的高陡边坡稳定性的不利影响以及东风村、蒋刘村等大型滑坡发生的根本原因。

关键词：黄土优先流连通性微观结构地理信息系统