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Near-perfect replication on amorphous alloys through active force modulation based on machine learning/neural network parameter prediction

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 181-191页

作者： Senkuan meng Zheng Wang Ruisong Zhu Ruijie Liu Jiang Ma Lina hu Weihua Wang Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education) School of Materials Science and Engineering Shandong University College of Mechatronics and Control Engineering Shenzhen University Songshan Lake Materials Laboratory Institute of Physics Chinese Academy of Sciences

As a microforming technique, micro/nano-structural replication possesses advantages of high precision and efficiency. With the remarkable superplasticity in the supercooled liquid region, amorphous alloys or metallic glasses(MGs) are regarded as ideal materials for miniature fabrication. However, due to the intrinsic metastable nature of supercooled liquids, the design of imprinting processes for MGs poses a challenge. In the past, process parameters have largely relied on trial-and-error *** this work, a low-frequency active force modulation system is employed to apply a stable, precise, and real-time feedback stress field for imprinting of MG samples. Low-frequency vibrations can facilitate the filling of microstructures on the template surface by reducing the effective viscosity of the supercooled liquid. With the dataset composed of orthogonal experiments, a machine learning strategy based on back-propagation(BP) neural networks was utilized to construct a 3D parameter space for temperature, stress, and time, and to predict the corresponding filling ratio. Furthermore, the optimal combination of imprinting process parameters was identified, and its filling ratio was experimentally validated to reach as high as 0.94. The near-perfect replication of microstructures confirms the superiority of the active force modulation system and the data-driven strategy of machine learning-assisted parameter design. At the same time, this one-step microforming process provides a new approach to addressing the accuracy-cost trade-off dilemma in precision manufacturing.

关键词： metallic glass amorphous alloy microforming imprinting machine learning

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A Novel Model for Describing Rail Weld Irregularities and Predicting Wheel-Rail Forces Using a Machine Learning Approach

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Computer Modeling in Engineering & Sciences 2025年第1期142卷 555-577页

作者： Linlin Sun Zihui Wang Shukun Cui Ziquan Yan Weiping hu Qingchun meng State Key Laboratory of High-Speed Railway Track System China Academy of Railway Sciences Corporation LimitedBeijing100081China Railway Engineering Research Institute China Academy of Railway Sciences Corporation LimitedBeijing100081China School of Aeronautic Science and Engineering Beihang UniversityBeijing100191China

Rail weld irregularities are one of the primary excitation sources for vehicle-track interaction dynamics in modern high-speed *** can cause significant wheel-rail dynamic interactions,leading to wheel-rail noise,component damage,and *** researchers have employed the vehicle-track interaction dynamic model to study the dynamic interactions between wheel and rail induced by rail weld geometry ***,the cosine wave model used to simulate rail weld irregularities mainly focuses on the maximum value and neglects the geometric *** this study,novel theoretical models were developed for three categories of rail weld irregularities,based on measurements of the high-speed railway from Beijing to *** vertical dynamic forces in the time and frequency domains were compared under different running *** forces generated by the rail weld irregularities that were measured and modeled,respectively,were compared to validate the accuracy of the proposed ***,based on the numerical study,the impact force due to rail weld irrregularity is modeled using an Artificial Neural Network(ANN),and the optimum combination of parameters for this model is *** results showed that the proposed model provided a more accurate wheel/rail dynamic evaluation caused by rail weld irregularities than that established in the *** ANN model used in this paper can effectively predict the impact force due to rail weld irrregularity while reducing the computation time.

关键词： Rail weld irregularity high-speed railway vehicle-track coupled dynamics wheel/rail dynamic vertical force artificial neural networks

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滇边佤寨的病痛叙事、脆弱性与具身化国家

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华东师范大学学报（哲学社会科学版） 2018年第5期50卷 57-64,173,174页

作者：黄剑波胡梦茵田远帆华东师范大学人类学研究所

医学人类学的研究通常把身体作为研究疾痛的一个重要焦点,而越来越多的人类学研究也试图讨论"自然"的身体是如何成为社会结构的隐喻。基于五个月的田野调查,通过大量的民族志材料,并通过分析在现代医学以及传统驱鬼仪式失效之后佤寨村... 详细信息

医学人类学的研究通常把身体作为研究疾痛的一个重要焦点,而越来越多的人类学研究也试图讨论"自然"的身体是如何成为社会结构的隐喻。基于五个月的田野调查,通过大量的民族志材料,并通过分析在现代医学以及传统驱鬼仪式失效之后佤寨村民试图理解自身的疾痛的叙事追因,可以理解当地村民在现代医疗体系之外疾痛叙事的社会语境,以及当地人对于身体脆弱性的持续感知。随着公共卫生的建设,当地长久存在的瘴气疫病说逐渐消失,但是依然存在着现代医学体系范围之外的疾痛叙事。这种个体的疾痛叙事体现了失序的身体转化为对于身体脆弱性的持续体验,而这种脆弱性则可以发现一个"具身化"的国家——即可以揭示国家力量如何深入地方社会,并内化于个体。

关键词：疾痛叙事脆弱性具身化国家

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圆柱分层介质中格林函数的完整求解Ⅱ:混合位格林函数

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微波学报 2009年第4期25卷 11-15页

作者：胡梦中尹成友宋铮解放军电子工程学院合肥230037

在PartⅠ的基础之上,详细、完整地推导出有关z、φ和ρ方向电偶极子圆柱分层介质的3种不同形式的混合位格林函数。分析了这3种格林函数的特点,从而为利用混合位积分方程(MPIE)准确分析圆柱共形微带天线提供了理论基础。通过与文献[2]、... 详细信息

在PartⅠ的基础之上,详细、完整地推导出有关z、φ和ρ方向电偶极子圆柱分层介质的3种不同形式的混合位格林函数。分析了这3种格林函数的特点,从而为利用混合位积分方程(MPIE)准确分析圆柱共形微带天线提供了理论基础。通过与文献[2]、[3]给出的混合位格林函数的比较,说明了本文公式的正确性,最后,通过Mat-lab仿真,成功计算了文献[8]中的圆柱分层介质的第一类混合位格林函数。

关键词：圆柱分层介质混合位积分方程混合位格林函数广义函数束法

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Photo‑Energized MoS_(2)/CNT Cathode for High‑Performance Li–CO_(2)Batteries in a Wide‑Temperature Range

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Nano-Micro Letters 2025年第1期17卷 160-175页

作者： Tingsong hu Wenyi Lian Kang hu Qiuju Li Xueliang Cui Tengyu Yao Laifa Shen Jiangsu Key Laboratory of Materials and Technologies for Energy Storage College of Materials Science and TechnologyNanjing University of Aeronautics and AstronauticsNanjing 210016People’s Republic of China

Li–CO_(2) batteries are considered promising energy storage systems in extreme environments such as Mars;however,severe performance degradation will occur at a subzero temperature owning to the sluggish reaction ***,a photo-energized strategy adopting sustainable solar energy in wide working temperature range Li–CO_(2) battery was achieved with a binder-free MoS_(2)/carbon nanotube(CNT)photo-electrode as *** unique layered structure and excellent photoelectric properties of MoS_(2) facilitate the abundant generation and rapid transfer of photo-excited carriers,which accelerate the CO_(2) reduction and Li_(2)CO_(3) decomposition upon *** illuminated battery at room temperature exhibited high discharge voltage of 2.95 V and mitigated charge voltage of 3.27 V,attaining superior energy efficiency of 90.2%and excellent cycling stability of over 120 *** at an extremely low temperature of−30℃,the battery with same electrolyte can still deliver a small polarization of 0.45 V by the photoelectric and photothermal synergistic mechanism of MoS_(2)/CNT *** work demonstrates the promising potential of the photo-energized wide working temperature range Li–CO_(2) battery in addressing the obstacle of charge overpotential and energy efficiency.

关键词： Li-CO_(2)batteries Photo-energized Wide operation-temperature Kinetics MoS_(2)

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The influence of OCT1 gene polymorphisms on the metformin response in Uygur patients with glucose metabolism disorder

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新疆医科大学学报 2010年第10期33卷 1175-1180页

作者： WANG Tao YI Tao-cun WANG Ye WANG Zhi-hong WANH Chang-hui MAO Xin-min RAN Xin-jian hu meng-yin GE Wen-ning ZHANG Min-fang XIE Zi-jing LI Shi-qiang LAN Yi LI Lin-lin Department of Pharmacology Xinjiang Medical University Urumqi 830011 China Urumqi Friendship Hospital Urumqi 830049 China

Objective To determine the effects of genetic variation in the organic cation transporter 1(OCT1)on the short-term responses of the antidiabetic drug,*** A total of 22 patients recruited with type 2 diabetes or IFG were treated with metformin(2 000 mg/day)for 1 *** patients were screened from Second Jikun hospital and Kashidonglu community medicine service,Urumqi,China and their surrounding *** examine the effects of metformin on plasma glucose,total cholesterol,low-density lipoprotein-cholesterol,high-density lipoprotein-cholesterol and triglyceride in relation with R61C,G465R and 420 del variants of OCT1(gene encoding organic cation transporter 1,mainly locating in liver,which is metformin's major target)in *** all,R61C,G465R and 420del of OCT1 gene were examined using DNA extracted from whole blood and *** concerning with gene and metformin treatment were handled by *** After metformin treatment,there were increases both in FPG and LDL(P=0.011and P=0.013 respectively).To divide all participants into mutant and wild groups,according to the polymorphisms of R61C,G465R and 420 del respectively,as well as carriers with one of the mutant genotypes at least and carriers with none of the mutant *** was made to compared FPG,Chol,TG,and LDL and HDL between carriers of wild genotypes and carriers of other genotypes showed no statistic significance both before the metformin treatment and after the *** same is the case with changes of FPG,Chol,TG,and LDL and HDL of wild genotype carriers and variant genotype carriers,except of LDL changes(P=0.05)in patients grouped by G465R polymorphisms and TG changes(P=0.03)in subjects differed by 420del *** In this study,it is suggested that OCT1 gene polymorphisms have little contribution to the clinical efficacy of blood glucose control by metformin among Uygur people with type 2 diabetes or IFG,but it may have possible relationship with the cli

关键词： OCT1基因基因治疗疗效

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Fabrication and Mechano-sensing Characteristics of Bending Polypyrrole Actuator

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 240-245页

作者： CHEN Jinyou hu Wei School of Automotive Engineering Hunan Financial&Industrial Vocational-technical CollegeHengyang 421002China College of Mechanical and Electrical Engineering Hunan Agricultural UniversityChangsha 410128China

To prepare a conductive polymer actuator with decent performance,a self-built experimental platform for the preparation of polypyrrole film is *** of the essential goals is to examine the mechanical characteristics of the actuator in the presence of various combinations of process parameters,combined with the orthogonal test method of"four factors and three levels".The bending and sensing characteristics of actuators of various sizes are methodically examined using a self-made bending polypyrrole *** functional relationship between the bending displacement and the output voltage signal is established by studying the characteristics of the actuator sensor subjected to various degrees of *** experimental results reveal that the bending displacement of the actuator tip almost exhibits a linear variation as a function of length and *** the voltage reaches 0.8 V,the bending speed of the actuator tends to be ***,the mechanical properties of the self-assembled polypyrrole actuator are verified by the design and fabrication of the microgripper.

关键词： conductive polymer polypyrrole mechanical characteristics actuators sensing characteristics

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高温热脱附技术对柴油机尾气颗粒物中小分子易挥发组分的分析研究

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分析测试学报 2008年第S1期27卷 231-232页

作者：杨正春范国樑马郁胡茵梦刘京虎王立敏天津大学材料科学与工程学院天津300072 天津工业大学材料科学与工程学院天津300000

A thermal desorption method for analysis of the volatile components on carbon particles,which were produced by the combustion of diesel oil,has been *** collection equipment of carbon particles was designed and the pyrolysis instrument was used as the thermal desorption *** collected carbon particles were injected into the pyrolysis instrument and desorbed at the temperature of 700 ℃.All the volatile components were analyzed by gas chromatography-mass spectrometry(GC-MS).The results showed that the volatile component on carbon particle could be rapidly *** method provided a guidance to the further research of the burning behaviors of the diesel oil.

关键词： thermal desorption analysis volatile components diesel oil

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Sulfolane‑Based Flame‑Retardant Electrolyte for High‑Voltage Sodium‑Ion Batteries

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Nano-Micro Letters 2025年第2期17卷 498-516页

作者： Xuanlong He Jie Peng Qingyun Lin meng Li Weibin Chen Pei Liu Tao huang Zhencheng huang Yuying Liu Jiaojiao Deng Shenghua Ye Xuming Yang Xiangzhong Ren Xiaoping Ouyang Jianhong Liu Biwei Xiao Jiangtao hu Qianling Zhang Graphene Composite Research Center College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen 518060People’s Republic of China Center of Electron Microscopy State Key Laboratory of Silicon and Advanced Semiconductor MaterialsSchool of Materials Science and EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China GRINM(Guangdong)Research Institute for Advanced Materials and Technology FoshanGuangdong 528051People’s Republic of China College of Energy Engineering Zhejiang UniversityHangzhouZhejiang 310027People’s Republic of China School of Materials Science and Engineering Xiangtan UniversityXiangtan 411105People’s Republic of China Shenzhen Eigen-Equation Graphene Technology Co.Ltd Shenzhen 518000People’s Republic of China

Sodium-ion batteries hold great promise as next-generation energy storage ***,the high instability of the electrode/electrolyte interphase during cycling has seriously hindered the development of *** particular,an unstable cathode–electrolyte interphase(CEI)leads to successive electrolyte side reactions,transition metal leaching and rapid capacity decay,which tends to be exacerbated under high-voltage ***,constructing dense and stable CEIs are crucial for high-performance *** work reports localized high-concentration electrolyte by incorporating a highly oxidation-resistant sulfolane solvent with non-solvent diluent 1H,1H,5H-octafluoropentyl-1,1,2,2-tetrafluoroethyl ether,which exhibited excellent oxidative stability and was able to form thin,dense and homogeneous *** excellent CEI enabled the O3-type layered oxide cathode NaNi_(1/3)Mn_(1/3)Fe_(1/3)O_(2)(NaNMF)to achieve stable cycling,with a capacity retention of 79.48%after 300 cycles at 1 C and 81.15%after 400 cycles at 2 C with a high charging voltage of 4.2 *** addition,its nonflammable nature enhances the safety of *** work provides a viable pathway for the application of sulfolane-based electrolytes on SIBs and the design of next-generation high-voltage electrolytes.

关键词： Sodium-ion batteries Sulfolane-based electrolyte High voltage Layered oxide cathode Flame retardant

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miRNA-21-5p is an important contributor to the promotion of injured peripheral nerve regeneration using hypoxia-pretreated bone marrow-derived neural crest cells

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Neural Regeneration Research 2025年第1期20卷 277-290页

作者： meng Cong Jing-Jing hu Yan Yu Xiao-Li Li Xiao-Ting Sun Li-Ting Wang Xia Wu Ling-Jie Zhu Xiao-Jia Yang Qian-Ru He Fei Ding Hai-Yan Shi School of Medicine Nantong UniversityNantongJiangsu ProvinceChina Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education and Coinnovation Center of Neuroregeneration Nantong UniversityNantongJiangsu ProvinceChina Department of Physiology Jiangsu Health Vocational CollegeNanjingJiangsu ProvinceChina Department of Pathology Affiliated Hospital of Nantong UniversityNantongJiangsu ProvinceChina Jiangsu Clinical Medicine Center of Tissue Engineering and Nerve Injury Repair Affiliated Hospital of Nantong UniversityNantongJiangsu ProvinceChina

Our previous study found that rat bone marrow–derived neural crest cells(acting as Schwann cell progenitors)have the potential to promote long-distance nerve ***-based therapy can enhance peripheral nerve repair and regeneration through paracrine bioactive factors and intercellular ***,the complex contributions of various types of soluble cytokines and extracellular vesicle cargos to the secretome remain *** investigate the role of the secretome and extracellular vesicles in repairing damaged peripheral nerves,we collected conditioned culture medium from hypoxia-pretreated neural crest cells,and found that it significantly promoted the repair of sensory neurons damaged by oxygen-glucose *** mRNA expression of trophic factors was highly expressed in hypoxia-pretreated neural crest *** performed RNA sequencing and bioinformatics analysis and found that miR-21-5p was enriched in hypoxia-pretreated extracellular vesicles of neural crest ***,to further clarify the role of hypoxia-pretreated neural crest cell extracellular vesicles rich in miR-21-5p in axonal growth and regeneration of sensory neurons,we used a microfluidic axonal dissociation model of sensory neurons in vitro,and found that hypoxia-pretreated neural crest cell extracellular vesicles promoted axonal growth and regeneration of sensory neurons,which was greatly dependent on loaded ***,we constructed a miR-21-5p-loaded neural conduit to repair the sciatic nerve defect in rats and found that the motor and sensory functions of injured rat hind limb,as well as muscle tissue morphology of the hind limbs,were obviously *** findings suggest that hypoxia-pretreated neural crest extracellular vesicles are natural nanoparticles rich in ***-21-5p is one of the main contributors to promoting nerve regeneration by the neural crest cell *** helps to explain the mechanism of action of the secretome and e

关键词： axotomy cell-free therapy conditioned medium extracellular vesicles hypoxic preconditioning microRNA oxygen-glucose deprivation peripheral nerve injury Schwann cell precursors

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