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Comparison of tissue response and lifting effect induced by non-absorbable elastic thread and commercialized threads in rat model

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regenerative Biomaterials 2025年第1期4卷 84-93页

作者： dae Hyung Lee Yeji Choi Mi Hee Lee Jong-Chul Park Advanced Medical Device R&D Center HansBiomed Co.LtdSeoul 05836Republic of Korea Cellbiocontrol Laboratory Department of Medical EngineeringYonsei University College of MedicineSeoul 03722Republic of Korea

As we age,our skin loses elasticity and wrinkles *** prevent this,most people try to improve skin wrinkles by performing procedures such as fillers,and absorbable lifting *** way to solve this structural problem is to use an elastic *** elastic sutures made of polymer materials(such as silicone)are widely used,data regarding their properties and potential effectiveness are *** study aimed to investigate the effects of inserting non-absorbable elastic threads,with different manufacturing requirements and methods,on the skin and subcutaneous *** this study,non-absorbable elastic threads ELATENS and Elasticum using different manufacturing methods were *** thread was transplanted into the subcutaneous layer of the back of a rat to induce *** inducing wrinkles in the skin of rat,the degree of skin maintenance by each thread and the thickness of the capsule formed around the suture were *** ex-vivo experiments on each thread,the fixation force in the tissue was *** a comparison of inflammatory response and collagen formation through histological analysis,it was confirmed that there was no significant difference from the equivalent comparative *** conclusion,the degree of encapsulation between tissues and collagen fiber formation for improving skin wrinkles was superior in elastic threads compared to non-elastic *** is believed that this provides certain elasticity to the skin layer and can induce cell influx to improve wrinkles.

关键词： elasticity lifting rejuvenation suture thread

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Microstructure evolution and phase transformation of the mushy zone in a quenchedβ-solidifying TiAl alloy

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Journal of Materials science & Technology 2024年第2期169卷 28-41页

作者： Fuqiang Zhang Xianfei ding Leming Xu Xin Feng Hai Nan Jianping He Yongfeng Liang Junpin Lin State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China Cast Titanium Alloy R&D Center Beijing Institute of Aeronautical MaterialsBeijing 100095China

This study investigates the phase constitutions and transformations that occur in the mushy zone and in the adjacent phase fields of a directionally solidified Ti-44Al-8Nb-1Cr alloy via quenching *** results indicate that the mushy zone consists of unmeltedβdendrites and interdendritic liquid,whose formation can be attributed to the difference in melting point aroused by local heterogeneity in ***βdendrite is composed of numerous subgrains with various *** quenching,theβdendrite transforms into Widmanstättenαvia a precipitation reaction,owing to the decreasing cooling rate caused by heat transfer from the surrounding ***,after quenching,the interdendritic liquid is transformed intoγ*** the singleβphase field and the lower part of the mushy zone,a massive transformation ofβtoγ***,in theβ+αphase field,bothβandαphases are retained to ambient *** the heating process,the transformation ofα→βgives rise to the formation ofβvariants,which affects the orientation ofβdendrites in the mushy *** growth kinematics of theα→βtransformation was elucidated,revealing the preferential growth directions of111and112forβ***,this study presents an illustration of the formation process of the mushy zone and the microstructural evolution during the heating and quenching process.

关键词： Titanium aluminides Mushy zone Quenching Electron backscattering diffraction Phase transformation

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EBSd parameter assessment and constitutive models of crept Hr3C austenitic steel

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Journal of Iron and Steel research International 2023年第4期30卷 772-781页

作者： Jie Zhang Zheng-fei Hu Zhen Zhang Shanghai Key Laboratory for R&D and Application of Metallic Functional Materials School of Materials Science and EngineeringTongji UniversityShanghai 201804China School of Materials Science and Engineering Nanjing Institute of TechnologyNanjing 211167JiangsuChina

Creep damage and evolution of Hr3C steel at 650℃ were investigated using electron backscatter diffraction(EBSd),and EBSd-based parameter assessments were *** analyses show that the grain size is almost unchanged and no obvious texture formed after creep at different creep *** lowest proportion of low Σ coincidence site lattice grain boundaries under 150 MPa implies that the primary twin structures are preserved under the low stress level,while some twin structures evolved into general grain boundaries at the high creep *** main damage features of microcracks and cavities can be seen along the grain boundaries:the former emerged at higher stress levels,while the latter appeared at the lower stress level,and both were shown under medium *** contrast shows that the most severe creep damage is present at 170 *** implies that the creep mechanism differs distinctly under different stress levels,and the transition point is around 170 *** average misorientation is better to describe the local plastic deformation related to the strain distribution while grain reference orientation deviation describes the inhomogeneous strain *** lifetime prediction models including the isothermal method,Larson-Miller parameter method and Monkman–Grant relation were evaluated by the experimental data and literature data,and they are valid for predicting creep behavior.

关键词： Austenitic heat-resistant steel Creep damage Electron backscatter diffraction Creep constitutive model Creep lifetime prediction

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Analysis of the Battery Capacity and Imbalanced Charging Ability for a Cascade H Bridge in Shinkansen regeneration Energy Storage Application 27

Analysis of the Battery Capacity and Imbalanced Charging Abi...

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27th International Conference on Electrical Machines and Systems, ICEMS 2024

作者： Jin, Zhaoyang Kondo, Keiichiro Nishi, Kentaro Saito, rika School of Advanced Science and Engineering Waseda University Tokyo Japan R&d Center Jr East Group Environmental Engineering Research Laboratory Saitama Japan

ISBN: (纸本)9784886864406

The Shinkansen, as a highly popular mode of transportation in Japan, consumes and regenerates substantial amounts of electricity energy. Because of the AC power supply of Shinkansen, the energy generated by regeneration braking of the Shinkansen is wasted and sent back to the commercial power grid if there is no other Shinkansen in same power feeding section. To effectively utilize this surplus energy, the ground-based energy storage systems is necessary. Cascade H bridge (CHB) system has advantages such as ease of modularization and low voltage stress on switching devices, making it widely used in high-voltage and high-power applications. The CHB is also used in ground-based energy storage systems of Shinkansen. However, CHB has issues like unbalanced voltage and power between different modules. In this study, the relationship between battery capacity of each module and the maximum unbalanced charging power that the CHB can withstand is studied to ensure that there is sufficient battery capacity during the design phase to guarantee the system has enough unbalanced charging capability. © 2024 The Institute of Electrical Engineers of Japan.

关键词： State of charge

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Improvement of Maglev Guideway Functional Plane deviation Measurement Method Based on Image recognition Technology 24

Improvement of Maglev Guideway Functional Plane Deviation Me...

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24th COTA International Conference of Transportation Professionals: resilient, Intelligent, Connected, and Lowcarbon Multimodal Transportation, CICTP 2024

作者： Fei, Peng Long, Peng Feng, Ye National Maglev Transportation Engineering R&D Center Tongji Univ. Shanghai China

ISBN: (数字)9780784485484

ISBN: (纸本)9780784485484

The guideway functional plane is a crucial component of high-speed maglev transit. due to factors like construction activities nearby, the maglev line’s piers and columns may be dislocated, resulting in additional local deviations on its guideway functional plane, posing safety risks. The traditional approach of deploying monitoring points on the guideway functional plane is unrealizable due to the clearance limit. The current solution uses pier displacement as an alternative to the deviation of the guideway functional plane. relevant research data shows this method can’t satisfy the accuracy requirement. This study adopts an indirect measurement method based on image recognition technology. relative displacement data between the girder and pier of the maglev line is obtained. The results demonstrate that image recognition-based indirect measurement method is simple and effective. The measured data would provide the basis for investigating the laws of deformations between the superstructure and substructure of the maglev track system. © ASCE.

关键词： Guideways

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In-situ construction of epitaxial phase for boosting zinc nucleation on three-dimensional interface

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Progress in Natural science:Materials International 2024年第3期34卷 578-584页

作者： Xin He Zhe Zhu Xiaoqiao Liao Kai Yang Yixue duan Linfeng Lv Chuan Zhao Wei Zhao Jibing Chen Peng Tian Xiaoyu Liu Liang He School of Mechanical Engineering State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering Sichuan University School of Chemistry Faculty of Science University of New South Wales School of Materials Science and Engineering Sichuan University of Science & Engineering School of Mechanical Engineering Wuhan Polytechnic University Med+X Center for Manufacturing West China Hospital Sichuan University Yibin Industrial Technology Research Institute of Sichuan University Yibin R&D Park of Sichuan University

Interface modification of zinc（Zn） metal anode with conductive three-dimensional（3d） structure is widely utilized in zinc ion batteries. However, the uniformity of zinc nucleation on surface microstructure is rarely investigated which exacerbates the tip effect and raises unstable risk. Herein, a strategy via the initial copper（Cu）alloying and following sulfurization treatment is reported to accomplish boosted uniform nucleation of zinc on the modified layer with dense microstructures. This epitaxial sulfide phase not only improves the wetting area to revitalize the microstructural surface, but also forms a bifunctional zincophilic Cu2S/CuZn alloy interface layer,which combines the merits of guided local ions diffusion and improved zinc nucleation environment. As a result, a homogeneous growth of zinc on the 3d structural substrate can be realized, and cycling stability of the achieved Cu2S/CuZn electrode with a practical capacity of 1 mAh cm-2under 1 mA cm-2or amplified current density of 10 mA cm-2is significantly enhanced. This work provides an epitaxial strategy in constructing a bifunctional zincophilic interface layer for boosting zinc nucleation, and offers a new perspective on the modification of 3d surface structure for stabilization of zinc anode.

关键词： Zn anode Hydrophilicity Sulfide CuZn alloy Zn metal battery

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Modeling and simulation of a reconfigurable multifunctional optical sensor

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Optoelectronics Letters 2025年第4期21卷 205-211页

作者： Shaher dWIK Gurusamy SASIKALA Department of Electronics&Communication Engineering School of Electrical&CommunicationVel Tech Rangarajan Dr:Sagunthala R&D Institute of Science and TechnologyChennai 600062India

Position sensitive device(PSd)sensor is a vital optical element that is mainly used in tracking systems for visible light communication(VLC).recently,a new reconfigurable PSd architecture *** proposed architecture makes the PSd perform more functions by modifying its *** the PSd is mainly formed of an array of *** primary concept involves employing transistors to alternate between the operating modes of the photodiodes(photoconductive and photovoltaic).Additionally,alternating among output pins can be done based on the required *** paper presents the mathematical modeling and simulation of a reconfigurable-multifunctional optical sensor which can perform energy harvesting and data acquisition,as well as positioning,which is not available in the traditional *** using the MATLAB software tool was achieved to demonstrate the *** simulation results confirmed the validity of the mathematical modeling and proved that the modified sensor architecture,as depicted by the equations,accurately describes its *** proposed sensor is expected to extend the battery's lifecycle,reduce its physical size,and increase the integration and functionality of the *** presented sensor might be used in free space optical(FSO)communication like cube satellites or even in underwater wireless optical communication(UWOC).

关键词： reconfigurable optical sensor alternate operating modes tracking systems multifunctional optical element position sensitive device psd sensor PSd

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Highly conductive and tough double-network hydrogels for smart electronics

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SmartMat 2024年第2期5卷 54-66页

作者： dong Zhang Yijing Tang Xiong Gong Yung Chang Jie Zheng Department of Chemical Biomolecularand Corrosion EngineeringThe University of AkronAkronOhioUSA School of Polymer Science and Polymer Engineering The University of AkronAkronOhioUSA R&D Center for Membrane Technology and Department of Chemical Engineering Chung Yuan Christian UniversityTaiwanChina

development and understanding of highly mechanically robust and electronically conducting hydrogels are extremely important for ever-increasing energy-based *** mixing/blending of conductive additives with hydrophilic polymer network prevents both high mechanical strength and electronic conductivity to be presented in polymer ***,we proposed a double-network(dN)engineering strategy to fabricate PVA/PPy dN hydrogels,consisting of a conductive PPy-PA network via in-situ ultrafast gelation and a tough PVA network via a subsequent freezing/thawing *** resultant PVA/PPy hydrogels exhibited superior mechanical and electrochemical properties,including electrical conductivity of~6.8 S/m,mechanical strength of~0.39 MPa,and elastic moduli of~0.1 *** further transformation of PVA/PPy hydrogels into supercapacitors,they demonstrated a high capacitance of~280.7 F/g and a cycle life of 2000 galvanostatic charge/discharge cycles with over 94.3%capacity retention at the current density of 2 mA/cm2 and even subzero temperatures of−20℃.Such enhanced mechanical performance and electronic conductivity of hydrogels are mainly stemmed from a synergistic combination of continuous electrically conductive PPy-PA network and the two interpenetrating dN *** in-situ gelation strategy is applicable to the integration of ionic-/electrical-conductive materials into dN hydrogels for smart-soft electronics,beyond the most commonly used PEdOT:PSS-based hydrogels.

关键词： conducting polymers double-network hydrogels smart electronics supercapacitors

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Energy and Exergy Analysis of a Biodiesel Plant 36

Energy and Exergy Analysis of a Biodiesel Plant

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36th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2023

作者： Barbosa, Flavia V. Mendes, Paulo r.S. Castro, Carlos Teixeira, Senhorinha F.C.F. Teixeira, José C.F. MEtRICs R&D Center University of Minho School of Engineering Guimarães Portugal ALGORITMI R&D Center University of Minho School of Engineering Guimarães Portugal

ISBN: (纸本)9781713874928

despite the current push for full electrification of the transportation sector, the utilization of IC engines (either on their own or hybrid guise) will continue for the foreseeable future. This is even more evident in the freight industry and with construction equipment. Therefore, the use of alternative fuels is a vital stepping stone toward low-carbon transportation. Environmental regulations have been developing enormous interest in biodiesel as an alternating fuel, with the main objective of reducing emissions associated with the transportation sector. Biodiesel is a renewable fuel that is mainly produced from vegetable oils and animal fats. At an industrial scale, its production is an energy-intensive operation that contributes to the overall carbon footprint. The present paper describes the energy and exergy analysis of an existing biodiesel plant. The facility applies used cooking oils and vegetable oils as raw materials and has an annual consumption of over 1,100 toe (as of 2021). The analysis identified the possibility of using biomass as a primary energy source for heat. Furthermore, the detailed analysis of the plant operation enables the identification of energy conservation measures that can reduce the electricity consumption and the pellet consumption by 29 tons a year. © (2023) by ECOS 2023 All rights reserved.

关键词： Biodiesel

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Stability Assessment of the Surrounding Areas of the Powerhouse at the damo Hydropower Station

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ce/papers 2025年第2期8卷 463-470页

作者： Wang, Jingyong Wang, Xiaohong Cheng, Yongjin Chu, Weijiang Wang, Can Power China Huadong Engineering Co. Ltd Hangzhou311122 China Hydro-China Itasca R&D Center Hangzhou311122 China

The damo Hydropower Station, a critical infrastructure facility, requires a thorough stability assessment to ensure its safe operation and reliability. This paper presents a comprehensive investigation of the powerhouse area's stability, focusing on the geological and hydrogeological conditions, existing deformations, and their underlying causes and trends. The damo station's vicinity to active and historical coal mining regions, particularly the K7, K8, and K10 seams, poses significant challenges to its structural stability. The research employs the Mohr-Coulomb plastic model in FLAC3d and UdEC simulations to scrutinize the deformation induced by mining activities. Key findings indicate that subsidence is the primary deformation type, with the powerhouse area experiencing cumulative horizontal and vertical displacements, highlighting the need for continuous monitoring and risk management. The study concludes with an anticipated subsidence of 0.90 to 1.25 meters and suggests enhanced monitoring and strategic risk control measures, especially for the pressure pipeline, to ensure the long-term integrity of the damo Hydropower Station. © 2025 Ernst & Sohn GmbH.

关键词： risk management

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