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后冬奥时代我国冰雪产业高质量发展的动力变革与实现路径

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体育研究与教育 2024年第1期39卷 1-9页

作者：叶海波李嘉阚军常哈尔滨体育学院体育人文社会学院黑龙江哈尔滨150008 湖北休闲体育发展研究中心湖北武汉430062 哈尔滨体育学院体育教育训练学院黑龙江哈尔滨150008

运用文献资料法和逻辑分析法对后冬奥时代我国冰雪产业高质量发展的基础能力、发展机遇、动力变革进行了研究。研究发现:冰雪产业自身变革发展模式、拓展地理空间、服务乡村振兴、区域协同等自身优势为高质量发展奠定了基础;北京冬奥会... 详细信息

运用文献资料法和逻辑分析法对后冬奥时代我国冰雪产业高质量发展的基础能力、发展机遇、动力变革进行了研究。研究发现:冰雪产业自身变革发展模式、拓展地理空间、服务乡村振兴、区域协同等自身优势为高质量发展奠定了基础;北京冬奥会为我国冰雪产业的高质量发展提供了发展机遇,加快构建了冰雪产业高质量发展的新格局,促进了产品体系完善和多链融合;产业变革的动力来自供需平衡、市场主体支撑、要素驱动转化、制度环境、科技创新。因此笔者提出要加强顶层设计,构建中国特色现代化的高质量冰雪产业发展体系;提高效率,规范职能,建设协同高效的一流营商环境;加强健康引领,丰富供给类型,建设服务人民的冰雪体育公共服务体系;夯实开放理念,增强科技助力,建设创新融合低碳发展的冰雪产业市场机制;建立支撑冰雪产业高质量发展的人才培养体系;以更高水平的对外开放,深度融入全球冰雪产业格局等路径促进后冬奥会时代我国冰雪产业的高质量发展。

关键词：冰雪产业高质量发展北京冬奥会动力变革新经济

面向SOT-MRAM的磁屏蔽仿真设计与优化

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中国集成电路 2024年第1期33卷 70-75页

作者：高宏叶海波王超孙杰杰中国电子科技集团公司第五十八研究所华中科技大学

磁随机存储器由于其高读写速度、接近无限次的读写次数和低功耗等优异特性受到越来越多的关注。磁随机存储器采用磁场方向来操作存储位,外部磁场很容易对磁结产生干扰导致读写错误的发生。因此采用磁屏蔽封装结构来减小外部磁场对存储... 详细信息

磁随机存储器由于其高读写速度、接近无限次的读写次数和低功耗等优异特性受到越来越多的关注。磁随机存储器采用磁场方向来操作存储位,外部磁场很容易对磁结产生干扰导致读写错误的发生。因此采用磁屏蔽封装结构来减小外部磁场对存储器的影响具有重要意义。本文针对第四代自旋轨道矩磁随机存储器的磁屏蔽优化设计进行研究,根据自旋轨道矩磁随机存储器的面内磁场敏感特性,采用平行式磁屏蔽封装形式,建立了磁屏蔽有限元模型,分析了磁屏蔽结构因素(间距,面积和厚度)和磁饱和现象对磁屏蔽效果的影响,为磁存储器磁屏蔽设计提供了新思路。

关键词：自旋轨道矩磁随机存储器磁屏蔽有限元

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SOT-MRAM读电路泄电结构优化

中国集成电路 2024年第6期33卷 43-47页

作者：王超吴晨烨叶海波陆楠楠李嘉威孙杰杰中国电子科技集团公司第五十八研究所

自旋轨道矩磁性随机存储器(SOT-MRAM)作为第四代磁随机存储器广受关注。SOT-MRAM为三端结构,应用于2T2R结构时,不对称写入容易导致电荷积累,从而对读产生影响,甚至导致读取错误的发生。因此研究针对SOT-MRAM特点的读电路泄电结构,减小... 详细信息

自旋轨道矩磁性随机存储器(SOT-MRAM)作为第四代磁随机存储器广受关注。SOT-MRAM为三端结构,应用于2T2R结构时,不对称写入容易导致电荷积累,从而对读产生影响,甚至导致读取错误的发生。因此研究针对SOT-MRAM特点的读电路泄电结构,减小写入对读取通路的影响具有重要意义。本文针对SOT-MRAM写入不对称导致电荷积累问题,对比了两种泄电电路结构,有效降低了首个读周期的读取时间延迟。研究了引入的泄电结构对位线电容的容忍度的影响。分析了位线电容差异导致读取不对称的机理,结合首个读周期读取时间延迟问题,提出了适合SOT-MRAM特点的读取电路泄电结构。本文的研究为SOT-MRAM读取电路的设计提供了新思路。

关键词：自旋轨道矩磁随机存储器读电路泄电

A Review on Vibration Control of Multiple Cylinders Subjected to FlowInduced Vibrations

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China Ocean Engineering 2024年第2期38卷 183-197页

作者： XU Wan-hai MA ye-xuan State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation Tianjin UniversityTianjin 300350China Institute of Mechanics Chinese Academy of SciencesBeijing 100190China

The fatigue damage caused by flow-induced vibration(FIV)is one of the major concerns for multiple cylindrical structures in many engineering *** FIV suppression is of great importance for the security of many cylindrical *** active and passive control methods have been employed for the vibration suppression of an isolated cylinder undergoing vortex-induced vibrations(VIV).The FIV suppression methods are mainly extended to the multiple cylinders from the vibration control of the isolated *** to the mutual interference between the multiple cylinders,the FIV mechanism is more complex than the VIV mechanism,which makes a great challenge for the FIV *** efforts have been devoted to vibration suppression of multiple cylinder systems undergoing FIV over the past two *** control methods,such as helical strakes,splitter plates,control rods and flexible sheets,are not always effective,depending on many influence factors,such as the spacing ratio,the arrangement geometrical shape,the flow velocity and the parameters of the vibration control *** FIV response,hydrodynamic features and wake patterns of the multiple cylinders equipped with vibration control devices are reviewed and *** FIV suppression efficiency of the vibration control methods are analyzed and compared considering different influence *** research on the FIV suppression of multiple cylinders is suggested to provide insight for the development of FIV control methods and promote engineering applications of FIV control methods.

关键词： flow-induced vibration vibration control multiple cylinders tandem side-by-side staggered

Building the toolbox for in vivo glia-to-neuron reprogramming

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Neural Regeneration Research 2024年第6期19卷 1171-1172页

作者： ye Xie bo Chen Departments of Ophthalmology and Neuroscience Icahn School of Medicine at Mount SinaiNew YorkNYUSA

Unlike regenerative-competent species that possess a remarkable intrinsic capacity to replenish lost neurons and restore neurocircuits spontaneously,the central nervous system in adult mammals lacks the ability to compensate for the neuronal loss caused by neurodegenerative diseases or traumatic injuries resulting in permanent loss of *** by earlier discoveries that radial glia or astrocytes isolated from the postnatal cortex can generate neurons.

关键词： injuries cortex diseases

Experimental Study on Vortex-Induced Vibration of Rough Risers with Coupling Interference Effect Under Side-by-Side Arrangement

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China Ocean Engineering 2024年第1期38卷 18-28页

作者： HU Ze-bo LIU Zhen LI Peng GUO hai-yan WANG Shu-bing REN Xiao-hui HOU Hao WANG ye-shuo College of Civil Engineering and Architecture Shandong University of Science and TechnologyQingdao 266590China Qingdao Key Laboratory of Marine Civil Engineering Materials and Structures Qingdao 266590China College of Engineering Ocean University of ChinaQingdao 266100China CHEC Dredging Co. LtdShanghai 200136China

A vortex-induced vibration(VIV)experiment of rough risers with coupling interference effect under a side-by-side arrangement was carried out in a wave-current combined *** roughness of the riser was characterized by arranging different specifications of surface attachments on the surface of the *** risers with three different roughnesses were arranged side by side with smooth risers to explore the VIV response of the riser under the combined action of roughness and interference effect,and to reveal the coupling mechanism between roughness and interference *** experimental results show that,compared with that of a smooth riser,the VIV of a rough riser under the coupling interference effect has a wider"lock-in"region,and the displacement decreases more significantly at a high reduced velocity,which is more likely to excite higher-order modes and frequency *** addition,the displacement response and frequency response of the smooth riser are not significantly affected by wake interference from the rough riser,which is caused by the decrease of the wake region due to the delay of the boundary layer separation point of the rough riser.

关键词： marine riser vortex-induced vibration side-by-side arrangement roughness interference effect

Tea Consumption is Associated with Increased Risk of Kidney Stones in Northern Chinese： A Cross-sectional Study

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Biomedical and Environmental Sciences 2017年第12期30卷 922-926页

作者： WU Zhong Biao JIANG Tian LIN Guo Bing WANG You Xin ZHOU Yong CHEN Zhen Qian XU Yong Ming ye hai bo CHEN bo Jun BAO Xiao Zhao ZHANG Cun Ming Department of Urology The Affiliated Wenling Hospital of Wenzhou Medical University Wenling 317500 Zhejiang China Research Center for Translational Medicine The Affiliated Wenling Hospital of Wenzhou Medical University Wenling 317500 Zhejiang China Beijing Key Laboratory of Clinical Epidemiology School of Public Health Capital Medical University Beijing 100069 China Beijing Institute of Heart Lung and Blood Vessel Diseases Bejing Anzhen Hospital Capital Medical University Beijing 100029 China Department of Radiology The Affiliated Wenling Hospital of Wenzhou Medical University Wenling 317500 Zhejiang China

Kidney stones are a common urinary system condition that can progress to kidney disease. Previous studies on the association between tea consumption and kidney stones are inconsistent. A cross-sectional study to investigate the association between tea consumption and kidney stones was conducted from 2013 to 2014 and recruited 9,078 northern Chinese adults. A total of 8,807 participants were included in the final analysis. Participants＇ prevalence of kidney stones was 1.07%, 1.73%, and 2.25% based on their tea consumption frecluencv of never, occasionally,

关键词： Increased Risk of Kidney Stones Northern Chinese Cross-sectional Study

A Rendezvous Mission to the Second Earth Trojan Asteroid 2020 XL_5 with Low-Thrust Multi-Gravity Assist Techniques

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Research in Astronomy and Astrophysics 2024年第1期24卷 245-264页

作者： Shi-hai Yang bo Xu Xin Li School of Aeronautics and Astronautics Sun Yat-sen UniversityShenzhen 518107China

As the second of Earth's Trojan asteroids, 2020 XL_(5) is worthy of rendezvous and even sample return missions in many aspects. In this paper, a rendezvous mission to Earth's second Trojan asteroid 2020 XL_(5) is ***, due to its high inclination and large eccentricity, direct impulsive transfer requires large amounts of fuel consumption. To address this challenge, we explore the benefits of electric propulsion and multi-gravity assist techniques for interplanetary missions. These two techniques are integrated in this mission design. The design of a low-thrust gravity-assist(LTGA) trajectory in multi-body dynamics is thoroughly investigated,which is a complex process. A comprehensive framework including three steps is presented here for optimization of LTGA trajectories in multi-body dynamics. The rendezvous mission to 2020 XL_(5) is designed with this three-step approach. The most effective transfer sequence among the outcomes involves Earth–Venus–Earth–Venus-2020 XL_(5). Numerical results indicate that the combination of electric propulsion and multi-gravity assists can greatly reduce the fuel consumption, with fuel consumption of 9.03%, making it a highly favorable choice for this rendezvous mission.

关键词： minor planets asteroids:general celestial mechanics Planetary Systems

A hybrid memory architecture supporting fine-grained data migration

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Frontiers of Computer Science 2024年第2期18卷 31-41页

作者： ye CHI Jianhui YUE Xiaofei LIAO haikun LIU hai JIN National Engineering Research Center for Big Data Technology and System Services Computing Technology and System LabCluster and Grid Computing LabSchool of Computer Science and TechnologyHuazhong University of Science and TechnologyWuhan 430074China Department of Computer Science Michigan Technological UniversityMichigan 49931USA

Hybrid memory systems composed of dynamic random access memory(DRAM)and Non-volatile memory(NVM)often exploit page migration technologies to fully take the advantages of different memory *** previous proposals usually migrate data at a granularity of 4 KB pages,and thus waste memory bandwidth and DRAM *** this paper,we propose Mocha,a non-hierarchical architecture that organizes DRAM and NVM in a flat address space physically,but manages them in a cache/memory *** the commercial NVM device-Intel Optane DC Persistent Memory Modules(DCPMM)actually access the physical media at a granularity of 256 bytes(an Optane block),we manage the DRAM cache at the 256-byte size to adapt to this feature of *** design not only enables fine-grained data migration and management for the DRAM cache,but also avoids write amplification for Intel Optane *** also create an Indirect Address Cache(IAC)in Hybrid Memory Controller(HMC)and propose a reverse address mapping table in the DRAM to speed up address translation and cache ***,we exploit a utility-based caching mechanism to filter cold blocks in the NVM,and further improve the efficiency of the DRAM *** implement Mocha in an architectural *** results show that Mocha can improve application performance by 8.2%on average(up to 24.6%),reduce 6.9%energy consumption and 25.9%data migration traffic on average,compared with a typical hybrid memory architecture-HSCC.

关键词： non-volatile memory hybrid memory system data migration fine-grained caching