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Role of adaptation measures in addressing heatwave exposure in China

Advances in Climate Change Research 2024年第1期15卷 148-157页

作者： Qin-Mei han Qing-Chen CHAO Shao SUN pei-Jun SHI National Climate Centre China Meteorological AdministrationBeijing 100081China State Key Laboratoryof Severe Weather Chinese Academy of Meteorological Sciences Beijing 0o08lChina Faculty of Geographical Science Beijing Normal UniversityBeijing 100875China

Heatwave exposure has increased dramatically because of climate warming and population growth,along with their interactive ***,effective adaptation measures can reduce these ***,the dynamic changes,regional inequality in adaptive capacity and their potential contributions to reducing exposure in the future remain *** study quantifies the impact of adaptive capacity and underscores regional variations in heatwave magnitudes,population exposure and adaptation levels in *** projected the future adaptive capacity using air-conditioner penetration,factoring in climate cooling requirements and individuals'purchasing *** population and gross domestic product(GDP)data from four Shared Socioeconomic Pathways(SSP1,SSP2,SSP3 and SSP5)and daily temperature data from four SSP-based emission scenarios(SSP1-2.6,SSP2-4.5,SSP3-7.0 and SSP5-8.5),we estimated heatwave duration,population exposure and avoided impacts through adaptation across China and its *** show a substantial increase in heatwave duration in Southwest and Southern China,especially under the SSP5-8.5 scenario,with a projection of 163.2±36.7 d during *** the SSP3|SSP3-7.0 scenario,total exposure reaches 156.4±76.8 billion person d per year,which is the highest among all scenarios and 23 times greater than that in 1986-2005 without *** considering adaptation measures,a noteworthy reduction in population exposure is observed,especially in the SSP3|SSP3-7.0 and SSP5JSSP5-8.5 scenarios,with reductions of(62.6±3.9)%and(65.8±5.1)%,respectively,compared with the scenario without adaptation during *** regional disparities in avoided impacts are also evident,with variations of up to 50%across different *** implementation of effective and environmentally friendly adaptation measures can notably address climate change,thereby alleviating the profound threats posed to human well-being.

关键词： Heatwaves Population exposure Adaptation Future projection China

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Beneficial Effects and Potential Mechanisms of Tai Chi on Lower Limb Osteoarthritis:A Biopsychosocial Perspective

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Chinese Journal of Integrative Medicine 2023年第4期29卷 368-376页

作者： ZHUANG Shu-zhao CHEN pei-jie han Jia XIAO Wei-hua Shanghai Frontiers Science Research Base of Exercise and Metabolic Health Shanghai University of SportShanghai 200438China

Lower limb osteoarthritis(OA)is a chronic,multifactorial disease characterized by impaired physical function,chronic pain,compromised psychological health and decreased social *** inflammation plays a critical role in the pathophysiology of *** Chi is a type of classical mind-body exercise derived from ancient Chinese martial *** supports that Tai Chi has significant benefits for relieving lower limb OA *** a biopsychosocial framework,this review aims to elucidate the beneficial effects of Tai Chi in lower limb OA and disentangle its potential mechanisms from the perspective of biology,psychology,and social *** biomechanical,biochemical,neurological,psychological,and social mechanisms,including strengthening of muscles,proprioception improvement,joint mechanical stress reduction,change of brain activation and sensitization,attenuation of inflammation,emotion modulation and social support,are discussed.

关键词： Tai Chi osteoarthritis mechanism biopsychosocialmodel

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A sensitive detection of high Rydberg atom with large dipole moment

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Chinese Physics B 2018年第7期27卷 345-350页

作者： Shan-Shan Zhang Hong Cheng pei-pei Xin han-Mu Wang Zi-Shan Xu Hong-Ping Liu State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and Mathematics Chinese Academy of Sciences Wuhan 430071 China University of Chinese Academy of Sciences Beijing 100049 China

We report a sensitive detection of high Rydberg atom with large dipole moment utilizing its deflection near a pair of parallel cylindrical copper rods which are oppositely charged. When the low-field seeking state Rydberg atoms fly across the gradient electric field formed by the pair of rods, they will be pushed away from the rods while the high-field seeking state ones will be attracted towards the rods. These atoms will form different patterns on an ion imaging system placed downwards at the end of the rods. The spatial distribution of the deflected atoms on the imaging system is also simulated, in good agreement with the experimental results, from which we can deduce the quantum state information of the excited atoms. This state resolvable Rydberg atom detection can be used for the dynamics research of the dipole-dipole interaction between atoms with large dipole moments.

关键词： Rydberg Stark state sodium atom deflection dipole moment

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Effect of Hydroxyapatitc Nanoparticles on K562 Cells in vitro

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Journal of Wuhan University of Technology(Materials Science) 2008年第2期23卷 222-224页

作者： CHEN pei DAI Honglian han Yingchao YIN Meizhen LI Shipu Biomedical Materials and Engineering Center Wuhan University of Technology Wuhan 430070 China Nursing school Wuhan Railway Vocational College of Technology Wuhan 430205 China

Stable and single-dispersed hydroxyapatite （HAP） nanoparticles were synthesized with ultrasonic-assisted method. HAP nanoparticles were characterized by dynamic light scattering, XRD （X-ray diffraction） and TEM （Transmission Electron Microscopy）. The effect of HAP nanoparticles on the K562 human myelogenous leukemia cell line was investigated by MTT assay and cell count test, and the mechanism was studied through the changes of cell cycle and ultrastructure. The results showed that HAP nanoparticles inhibited the proliferation of K562 cells dramatically in vitro. HAP nanoparticles entered the cytoplasm of K562 cells and the cells were arrested at G/M phase, thus, the cells died directly.

关键词： hydroxyapatite(HAP) nanoparticles K562 cells MTT assay cell cycle

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Recent advances in efficient computation of deep convolutional neural networks

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Frontiers of Information Technology & Electronic Engineering 2018年第1期19卷 64-77页

作者： Jian CHENG pei-song WANG Gang LI Qing-hao HU han-qing LU National Laboratory of Pattern Recognition Institute of Automation Chinese Academy of Sciences Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China

Deep neural networks have evolved remarkably over the past few years and they are currently the fundamental tools of many intelligent *** the same time,the computational complexity and resource consumption of these networks continue to *** poses a significant challenge to the deployment of such networks,especially in real-time applications or on resource-limited ***,network acceleration has become a hot topic within the deep learning *** for hardware implementation of deep neural networks,a batch of accelerators based on a field-programmable gate array(FPGA) or an application-specific integrated circuit(ASIC)have been proposed in recent *** this paper,we provide a comprehensive survey of recent advances in network acceleration,compression,and accelerator design from both algorithm and hardware points of ***,we provide a thorough analysis of each of the following topics:network pruning,low-rank approximation,network quantization,teacher–student networks,compact network design,and hardware ***,we introduce and discuss a few possible future directions.

关键词： Deep neural networks Acceleration Compression Hardware accelerator

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Numerical study of PV/T-SAHP system

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第7期9卷 970-980页

作者： Gang pei Jie JI Ke-liang LIU han-feng HE Ai-guo JIANG Department of Thermal Science and Energy Engineering University of Science and Technology of China Hefei 230027 China

In order to utilize solar energy effectively and to achieve a higher electrical efficiency by limiting the operating temperature of the photovoltaic （PV） panel, a novel photovoltaic/thermal solar-assisted heat pump （PV/T-SAHP） system was proposed and constructed. The hybrid solar system generates electricity and thermal energy simultaneously. A distributed parameters model of the PWT-SAHP system was developed and applied to analyze the system dynamic performance in terms of PV action, photothermal action and Rankine cycle processes. The simulation results indicated that the coefficient of performance （COP） of the proposed PV/T-SAHP can be much better than that of the conventional heat pump. Both PV-efficiency and photothermic efficiency have been improved considerably. The results also showed that the performance of this PV/T-SAHP system was strongly influenced by the evaporator area, tube pitch and tilt angle of the PV/T evaporator, which are the key factors in PV/T-SAHP system optimization and PV/T evaporator design.

关键词： Photovoltaic (PV) Photothermic Heat pump Photovoltaic/thermal (PV/T) evaporator

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Recent progress in microstructural evolution,mechanical and corrosion properties of medium-Mn steel

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Journal of Iron and Steel Research International 2023年第8期30卷 1463-1476页

作者： Yan-xin Qiao Zhi-bin Zheng Hao-kun Yang Jun Long pei-xian han School of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212100JiangsuChina Institute of New Materials National Engineering Research Center of Powder Metallurgy of Titanium and Rare MetalsGuangdong Provincial Key Laboratory of Metal Toughening Technology and ApplicationGuangdong Academy of SciencesGuangzhou 510650GuangdongChina Smart Manufacturing Division(SMD) Hong Kong Productivity CouncilHong Kong 999077China Jiangxi Lianfeng Investment Casting Co. Ltd.Yichun 336300JiangxiChina

Medium-manganese(Mn)steel(MMS)has remarkable characteristics of high strength,strong work-hardening capacity,and wear resistance,being a promising third-generation advanced high-strength steel with lower raw material cost compared with other generations of advanced high-strength *** chemical composition and processing route play critical roles in determining the microstructural evolution of the MMS,and the microstructure composition significantly influences the mechanical,corrosion and wear properties of the ***,a lot of research work focus on exploring the direct relation between microstructural evolution and mechanical/corrosion/wear properties,and the progress has the following crucial aspects:(1)alloying design on the phase composition and carbide precipitation,(2)processing route on regulating microstructure evolution and twinning-induced plasticity and/or transformation-induced plasticity strengthening mechanism,(3)work-hardening,corrosion,and corrosion resistance of the regulated MMS,and(4)fracture and failure mechanism of MMS under tensile,corrosion and wear damages,as well as the improvement strategies.

关键词： Medium-Mn steel Microstructure Mechanical property Corrosion property Alloying design Processing route Fracture mechanism

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NiCoP/NiOOH nanoflowers loaded on ultrahigh porosity Co foam for hydrogen evolution reaction under large current density

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Green Energy & Environment 2022年第3期7卷 467-476页

作者： Yuantao pei Liang Huang Lei han Haijun Zhang Longhao Dong Quanli Jia Shaowei Zhang The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan430081China Henan Key Laboratory of High Temperature Functional Ceramics Zhengzhou UniversityZhengzhou450052China College of Engineering Mathematics and Physical SciencesUniversity of ExeterExeterEX44QFUnited Kingdom

Developing user-friendly electrodes for efficiently producing hydrogen from water to substitute non-renewable fossil fuels is one of the challenges in the hydrogen energy *** the first time,we have prepared self-supporting ultrahigh porosity cobalt foam loaded with NiCoP/NiOOH nanoflowers(NiCoP/CF)via freeze-drying and *** as-prepared hierarchical NiCoP/CF electrodes showed superior catalytic activity for hydrogen evolution reaction(HER)in alkaline *** one resulted from phosphorization at 350℃(NiCoP/CF-350)only required overpotential of-47,and-126 mV to deliver geometrical current density of-10 mA cm^(-2) and-100 mA cm^(-2),respectively,demonstrating improved catalytic activity than the electrodes prepared using a commercial nickel foam as a ***,it could retain its superior stability at a current density higher than-500 mA cm^(-2) for 16 *** an outstanding performance can be attributed to the ultrahigh porosity of Co foam support,optimal adsorption energies of HER intermediates(H^(*)),facile water dissociation on the NiCoP/NiOOH heterointerfaces,and the assistance of NiOOH facilitating the electrons transfer from the Co foam inside to the NiCoP *** work would provide a new strategy for future design of advanced HER electrocatalysts.

关键词： porosity loaded attributed

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The interference between a giant atom and an internal resonator

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Communications in Theoretical Physics 2021年第11期73卷 102-107页

作者： Xiao-pei Yang Zhi-Kun han Wen Zheng Dong Lan Yang Yu National Laboratory of Solid State Microstructures School of PhysicsNanjing UniversityNanjing 210093China

The Jaynes–Cummings model plays an important role in quantum entanglement and state ***,we discuss how to realize it in a waveguide-mediated interaction system,which comprises a giant atom and a *** show the vacuum Rabi splitting and discuss how to achieve a unidirectional *** extend the Purcell effect in c QED to this waveguide QED system,showing how to control the giant atom decay *** design can further be built experimentally and has application in quantum manipulation.

关键词： interference quantum optics waveguide QED

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碳族单质超导性的第一性原理研究

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原子与分子物理学报 2025年第4期42卷 87-92页

作者：韩沛辰林永熠郑磊刘其军刘正堂高娟西南交通大学物理科学与技术学院成都610031 西北工业大学凝固技术国家重点实验室西安710072

同为第四主族的元素,碳、硅、锗、锡、铅具有相似的价电子排布,但超导性却并不相同.锡和铅在常压下即可实现超导,硅和锗则需要在高压下才具有超导性,而碳的常规晶体结构在常压和高压下均尚未发现其超导性.压力在很大程度上是通过改变晶... 详细信息

同为第四主族的元素,碳、硅、锗、锡、铅具有相似的价电子排布,但超导性却并不相同.锡和铅在常压下即可实现超导,硅和锗则需要在高压下才具有超导性,而碳的常规晶体结构在常压和高压下均尚未发现其超导性.压力在很大程度上是通过改变晶体结构和原子之间的位置进而影响其超导性,本论文基于密度泛函理论的第一性原理计算,对碳、硅、锗、锡、铅五种第四主族元素的单质的晶体结构、电子结构、声子性质以及超导性质进行系统地对比分析.计算结果表明费米能级附近的电子态密度越高,金属体系实现超导所需的压力越小.在具有金属性的体系中价带靠近费米能级处带隙的存在会使电子更容易局域在费米能级附近,从而增大费米能级附近电子态的数目并提高体系的超导性.此研究为探究超导机制并提高材料的超导性提供思路.

关键词：超导性第一性原理计算碳族元素电子结构

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