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f. SIMULATION Of.CENTER CRACK OCCURRENCE IN TUBE ROUNDS DURING TWO-ROLL ROTARY ROLLING PROCESS

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Acta Metallurgica Sinica(English Letters) 2007年第3期20卷 225-234页

作者： S.Z. Li J. Xu Y.D. Yin J.G. Xue f. pan J.M. Zheng J.H. Yoon Department of.Materials f.rming and Control Engineering Anhui University of Technology Ma＇anshan 243002 China Provincial Key Laboratory of.Metals and Processing Ma＇anshan 243002 China Steel Tube ＆ Pipe Company of.Bao Steel Co. Ltd. Shanghai 200941 China Department of.Metallurgy and Materials Science Changwon National University Changwon 641-773 Korea

With the aid of.f. （f.nite element） code *** 2005, 2-D coupled thermo-mechanical simulation of.center-crack occurrence in round billet during 2-roll rotary rolling process was presented using Oyane ductile f.acture criteria. A simple modeling is put f.rward based on the spiral motion of.the workpiece as an essential characteristic in movement. The inf.uence of.the f.ed angle and the entry cone angle of.the main roll on the process was taken into account in the modeling. The soundness f.r simplif.ing the 3-D rotary rolling into a 2-D problem was discussed. By adopting the parameters of.Diescher piercer in 140mm mandrel mill of.Bao Steel, the distribution and development of.strain/stress were analyzed, and the eigen value of.ductile f.acture as well. The critical percentage of.diameter reduction was obtained f.om the simulation. The result showed a good agreement with the experimental value, and theref.re was of.widely guiding signif.cance to the practical process f.r rationally f.rmulating the def.rmation parameters of.steel tube piercing.

关键词： numerical simulation inside crack, tube piercing rotary rolling seamless tube def.rmation

Ni/W金属超晶格中的反常阻温特性(英文)

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低温物理学报 1999年第3期21卷 30-34页

作者：潘风明焦正宽浙江大学物理系

在室温到１５Ｋ范围内我们对Ｎｉ／Ｗ金属超晶格的输运性质进行了测量．随温度的降低，反常的电阻跳跃被发现，这种现象被归因于Ｎｉ／Ｗ超晶格样品从晶态到非晶态的结构相变．温度降低时，样品界面处的原子无序度增大，当这种无序积累... 详细信息

在室温到１５Ｋ范围内我们对Ｎｉ／Ｗ金属超晶格的输运性质进行了测量．随温度的降低，反常的电阻跳跃被发现，这种现象被归因于Ｎｉ／Ｗ超晶格样品从晶态到非晶态的结构相变．温度降低时，样品界面处的原子无序度增大，当这种无序积累到一定程度时样品发生从晶态到非晶态的结构相变．

关键词：超晶格超点阵结构相变 Ni/W 非晶态金属金属材料

Engineering atomic Rb-N conf.gurations to tune radical pathways f.r highly selective photocatalytic H2O2 synthesis coupled with biomass valorization

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Journal of.Energy Chemistry 2025年第1期100卷 215-225页

作者： Jiaye Li Shuang pan Yihuang Chen Qiong Liu College of.Chemistry and Materials Engineering Wenzhou University Guangdong Provincial Key Laboratory of.Chemical Measurement and Emergency Test Technology (China) Institute of Analysis Guangdong Academy of Sciences (China National Analytical CenterGuangzhou)

Photocatalytic oxygen reduction f.r hydrogen peroxide （H2O2） synthesis presents a green and costef.ective production ***,achieving highly selective H2O2synthesis remains challenging,necessitating precise control over f.ee radical reaction pathways and minimizing undesirable oxidative ***,we report f.r the visible light-driven simultaneous co-photocatalytic reduction of.O2to H2O2and oxidation of.biomass using the atomic rubidium-nitride modif.ed carbon nitride（CNRb）.The optimized CNRb catalyst demonstrates a record photoreduction rate of.8.01 mM h-1f.r H2O2generation and photooxidation rate of.3.75 mM h-1f.r f.rf.ryl alcohol to f.roic acid,achieving a remarkable solar-to-chemical conversion （SCC） ef.iciency of.up to 2.27%.Experimental characterizations and Df. calculation disclosed that the introducing atomic Rb–N conf.gurations allows f.r the high-selective generation of.superoxide radicals while suppressing hydroxyl f.ee radical *** is because the Rb–N serves as the new alternative site to perceive a stronger connection position f.r O2adsorption and reinf.rce the capability to extract protons,thereby triggering a high selective redox product *** study holds great potential in precisely regulating reactive radical processes at the atomic level,thereby paving the way f.r ef.icient synthesis of.H2O2coupled with biomass valorization.

关键词： Atomic economy Radical pathway regulation Rubidium atom coordination Biomass valorization

The role of.axon guidance molecules in the pathogenesis of.epilepsy

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Neural Regeneration Research 2025年第5期20卷 1244-1257页

作者： Zheng Liu Chunhua pan Hao Huang Department of.Neurology Affiliated Hospital of Zunyi Medical UniversityZunyiGuizhou ProvinceChina

Current treatments f.r epilepsy can only manage the symptoms of.the condition but cannot alter the initial onset or halt the progression of.the disease. Consequently, it is crucial to identif. drugs that can target novel cellular and molecular mechanisms and mechanisms of.action. Increasing evidence suggests that axon guidance molecules play a role in the structural and f.nctional modif.cations of.neural networks and that the dysregulation of.these molecules is associated with epilepsy susceptibility. In this review, we discuss the essential role of.axon guidance molecules in neuronal activity in patients with epilepsy as well as the impact of.these molecules on synaptic plasticity and brain tissue remodeling. f.rthermore, we examine the relationship between axon guidance molecules and neuroinf.ammation, as well as the structural changes in specif.c brain regions that contribute to the development of.epilepsy. Ample evidence indicates that axon guidance molecules, including semaphorins and ephrins, play a f.ndamental role in guiding axon growth and the establishment of.synaptic connections. Deviations in their expression or f.nction can disrupt neuronal connections, ultimately leading to epileptic seizures. The remodeling of.neural networks is a signif.cant characteristic of.epilepsy, with axon guidance molecules playing a role in the dynamic reorganization of.neural circuits. This, in turn, af.ects synapse f.rmation and elimination. Dysregulation of.these molecules can upset the delicate balance between excitation and inhibition within a neural network, thereby increasing the risk of.overexcitation and the development of.epilepsy. Inf.ammatory signals can regulate the expression and f.nction of.axon guidance molecules, thus inf.uencing axonal growth, axon orientation, and synaptic plasticity. The dysregulation of.neuroinf.ammation can intensif. neuronal dysf.nction and contribute to the occurrence of.epilepsy. This review delves into the mechanisms associated with

关键词： axon guidance drug-resistant epilepsy epilepsy nerve regeneration nervous system diseases neural pathways neuroinf.ammatory diseases neuronal plasticity neurons synaptic remodeling

Co-production of.hydrogen, oxygen, and electricity via an integrated solar-driven system with decoupled water electrolyzer and Na-Zn ion battery

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Journal of.Energy Chemistry 2025年第1期100卷 621-627页

作者： f.i Lv Longjie Liu Jiazhe Wu Pengf.i Wang Lixia pan Dengwei Jing Yubin Chen International Research Center f.r Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University

Combining water electrolysis and rechargeable battery technologies into a single system holds great promise f.r the co-production of.hydrogen （H2） and ***,the design and development of.such systems is still in its ***,an integrated hydrogen-oxygen （O2）-electricity co-production system f.aturing a bipolar membrane-assisted decoupled electrolyzer and a Na-Zn ion battery was established with sodium nickelhexacyanof.rrate （NaNiHCf. and Zn2+/Zn as dual redox *** decoupled electrolyzer enables to produce H2and O2in dif.erent time and space with almost 100%f.radaic ef.iciency at 100 mA ***,the charged NaNiHCf.and Zn electrodes af.er the electrolysis processes f.rmed a Na-Zn ion battery,which can generate electricity with an average cell voltage of.1.75 V at 10 m A *** connecting Si photovoltaics with the modular electrochemical device,a well-matched solar driven system was built to convert the intermittent solar energy into hydrogen and electric energy with a solar to hydrogen-electricity ef.iciency of.16.7%,demonstrating the f.exible storage and conversion of.renewables.

关键词： Hydrogen Electricity Decoupled water electrolyzer Na-Zn ion battery Solar energy

Sky location of.massive black hole binaries in the f.reground of.Galactic white dwarf.binaries

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 97-108页

作者： pan Guo Hong-Bo Jin Cong-f.ng Qiao Yue-Liang Wu The International Centre f.r Theoretical Physics Asia-Pacif.c University of Chinese Academy of Sciences The School of.Physical Sciences University of Chinese Academy of Sciences Institute f.r f.ontiers in Astronomy and Astrophysics Beijing Normal University National Astronomical Observatories Chinese Academy of Sciences Institute of.Theoretical Physics Chinese Academy of Sciences

f.r space-based gravitational wave （GW） detection,the main noise source f.r massive black hole binaries （MBHBs） is attributed to approximately 10～7double white dwarf.binaries in the *** a GW source,the amplitude of.the detector response,recorded by a space-based gravitational wave detector,exhibits a modulation ef.ect with a year period when observing the source f.om various orbital *** the adverse conditions mentioned above,where there is a strong f.reground noise and annual modulation in the signals,we employed the wavelet transf.rm and the strong-amplitude relevant orbital position search methods,which allows the weak MBHB sources to achieve higher locating *** detail,f.r two MBHB sources of.lower intensity,the precision of.luminosity distance,represented by the ratio ?DL/DLat the 95%conf.dence level,is enhanced by f.ctors of.～*** angular resolutions,denoted by??s,are enhanced by a f.ctor of.～*** improvements increase the number of.detectable GW sources,f.cilitate multi-messenger f.llow-up observations and provide constraints on the cosmological constant.

关键词： space-based gravitational wave detection gravitational waves massive black hole binaries

Def.ct Engineering:Can it Mitigate Strong Coulomb Ef.ect of.Mg^(2+)in Cathode Materials f.r Rechargeable Magnesium Batteries?

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Nano-Micro Letters 2025年第1期17卷 135-159页

作者： Zhengqing f.n Ruimin Li Xin Zhang Wanyu Zhao Zhenghui pan Xiaowei Yang School of.Chemistry and Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China School of.Chemistry and Chemical Engineering Taiyuan University of TechnologyTaiyuan 030024People’s Republic of China School of.Materials Science and Engineering Tongji UniversityShanghai 201804People’s Republic of China

Rechargeable magnesium batteries(RMBs)have been considered a promising“post lithium-ion battery”system to meet the rapidly increasing demand of.the emerging electric vehicle and grid energy storage ***,the sluggish dif.usion kinetics of.bivalent Mg^(2+)in the host material,related to the strong Coulomb ef.ect between Mg^(2+)and host anion lattices,hinders their f.rther development toward practical *** engineering,regarded as an ef.ective strategy to break through the slow migration puzzle,has been validated in various cathode materials f.r *** this review,we f.rst thoroughly understand the intrinsic mechanism of.Mg^(2+)dif.usion in cathode materials,f.om which the key f.ctors af.ecting ion dif.usion are f.rther ***,the positive ef.ects of.purposely introduced def.cts,including vacancy and doping,and the corresponding strategies f.r introducing various def.cts are *** applications of.def.ct engineering in cathode materials f.r RMBs with advanced electrochemical properties are also ***,the existing challenges and f.ture perspectives of.def.ct engineering in cathode materials f.r the overall high-perf.rmance RMBs are described.

关键词： Rechargeable magnesium battery Sluggish dif.usion kinetic Def.ct engineering Cathode materials Ion migration

Imperative f.r long-term management and surveillance in Kawasaki disease

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World Journal of.Clinical Cases 2025年第4期13卷 61-63页

作者： Yan pan f.-Yong Jiao Department of.Pediatrics The First Affiliated Hospital of Yangtze UniversityJingzhou 434000Hubei ProvinceChina Shaanxi Kawasaki Disease Diagnosis and Treatment Center Children’s HospitalShaanxi Provincial People’s Hospital of Xi’an Jiaotong UniversityXi’an 710000Shaanxi ProvinceChina

Kawasaki disease(KD)is a signif.cant pediatric vasculitis known f.r its potential to cause severe coronary artery *** the ef.ectiveness of.initial treatments,such as intravenous immunoglobulin,KD patients can experience long-term cardiovascular issues,as evidenced by a recent case report of.an adult who suf.ered a ST-segment elevation myocardial inf.rction due to previous KD in the World Journal of.Clinical *** editorial emphasizes the critical need f.r long-term management and regular surveillance to prevent such *** drawing on recent research and case studies,we advocate f.r a structured approach to f.llow-up care that includes routine cardiac evaluations and preventive measures.

关键词： Kawasaki disease Long-term management Coronary artery aneurysm Surveillance Preventive care

Stif.ness-tunable biomaterials provide a good extracellular matrix environment f.r axon growth and regeneration

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Neural Regeneration Research 2025年第5期20卷 1364-1376页

作者： Ronglin Han Lanxin Luo Caiyan Wei Yaru Qiao Jiming Xie Xianchao pan Juan Xing Department of.Pathophysiology School of Basic Medical SciencesSouthwest Medical UniversityLuzhouSichuan ProvinceChina Department of.Medicinal Chemistry School of PharmacySouthwest Medical UniversityLuzhouSichuan ProvinceChina

Neuronal growth, extension, branching, and f.rmation of.neural networks are markedly inf.uenced by the extracellular matrix—a complex network composed of.proteins and carbohydrates secreted by cells. In addition to providing physical support f.r cells, the extracellular matrix also conveys critical mechanical stif.ness cues. During the development of.the nervous system, extracellular matrix stif.ness plays a central role in guiding neuronal growth, particularly in the context of.axonal extension, which is crucial f.r the f.rmation of.neural networks. In neural tissue engineering, manipulation of.biomaterial stif.ness is a promising strategy to provide a permissive environment f.r the repair and regeneration of.injured nervous tissue. Recent research has f.ne-tuned synthetic biomaterials to f.bricate scaf.olds that closely replicate the stif.ness prof.les observed in the nervous system. In this review, we highlight the molecular mechanisms by which extracellular matrix stif.ness regulates axonal growth and regeneration. We highlight the progress made in the development of.stif.ness-tunable biomaterials to emulate in vivo extracellular matrix environments, with an emphasis on their application in neural repair and regeneration, along with a discussion of.the current limitations and f.ture prospects. The exploration and optimization of.the stif.ness-tunable biomaterials has the potential to markedly advance the development of.neural tissue engineering.

关键词： alginate axon growth biomaterials extracellular matrix neural repair neurons neuroregeneration polyacrylamide polydimethylsiloxane stif.ness