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Computer-controlled ultra high voltage amplifier for dielectric elastomer actuators

Biomimetic Intelligence & Robotics 2024年第1期4卷 14-23页

作者： ardi wiranata Zebing Mao Yu Kuwajima Yuya Yamaguchi Muhammad Akhsin Muflikhun Hiroki Shigemune Naoki Hosoya Shingo Maeda Department of Mechanical and Industrial Engineering University of Gadjah MadaYogyakarta 55281Indonesia Department of Mechanical Engineering Tokyo Institute of TechnologyTokyo 152-8550Japan Department of Engineering and Science Shibaura Institute of TechnologyTokyo 135-8548Japan Department of Electrical Engineering Shibaura Institute of TechnologyTokyo 135-8548Japan Department of Engineering Science and Mechanics Shibaura Institute of TechnologyTokyo 135-8548Japan Living Systems Materialogy(LiSM)Research Group International Research Frontiers Initiative(IRFI)Tokyo Institute of TechnologyYokohama 226-8501Japan

Soft robotics is a breakthrough technology to support human-robot *** soft structure of a soft robot can increase safety during human and robot *** of the promising soft actuators for soft robotics is dielectric elastomer actuators(DEAs).DEAs can operate silently and have an excellent energy *** simple structure of DEAs leads to the easy fabrication of soft *** simplicity combined with silent operation and high energy density make DEAs interesting for soft robotics *** actuation follows the Maxwell-pressure *** pressure produced in the DEAs actuation depends much on the voltage *** DEAs requires high voltage to gain an *** the power consumption of DEAs is in the milli-Watt range,the current needed to operate the DEAs can be *** commercially available DC-DC converters can convert the volt range to the kV *** order to get a voltage in the 2-3 kV range,the reliable DC-DC converter can be pricy for each *** problem hinders the education of soft actuators,especially for a newcomer laboratory that works in soft electric *** paper introduces an entirely do-it-yourself(DIY)Ultrahigh voltage amplifier(UHV-Amp)for education in soft ***-Amp can amplify 12 V to at a maximum of 4 kV *** a demonstration,we used this UHV-Amp to test a single layer of powdered-based *** strategy to build this educational type UHV-Amp was utilizing a Cockcroft-Walton circuit structure to amplify the voltage range to the kV *** its current state,the UHV-Amp has the potential to achieve approximately 4 *** created a simple platform to control the UHV-Amp from a personal *** near future,we expect this easy control of the UHV-Amp can contribute to the education of soft electric actuators.

关键词： Dielectric elastomer actuators Electric amplifier Soft actuators Soft robotics Soft actuator education

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Eccentric actuator driven by stacked electrohydrodynamic pumps

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2022年第4期23卷 329-334页

作者： Ze-bing MAO Yota ASAI ardi wiranata De-qing KONG Jia MAN Smart Materials Lab Department of Engineering Science and MechanicsShibaura Institute of TechnologyTokyo135-8548Japan Department of Mechanical and Industrial Engineering Faculty of EngineeringUniversity of Gadjah MadaYogyakarta55281Indonesia Muroran Institute of Technology MuroranHokkaidoJapan Key Laboratory of High Efficiency and Clean Mechanical Manufacture of MOE School of Mechanical EngineeringShandong UniversityJinan250061China

1 Introduction In the last decades,many fluidic actuators have been developed for numerous applications,e.g.,artificial muscles(Wang and Qu,2016),soft spatial finger(Mao et al.,2020a,2020c),soft robots(Shepherd et al.,2011),and compliant gripper(Li et al.,2021).Differing in their dimensions,they can be categorized into two groups:piston-cylinder fluidic actuators and elastic fluidic actuators(de Voider and Reynaerts,2010;Ye et al.,2019).

关键词： artificial dimensions cylinder

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Thermal stress relaxation in shot peened and laser peened nickel-based superalloy

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Journal of Materials Science & Technology 2020年第24期59卷 100-106页

作者： K.S.Chin S.Idapalapati D.T.ardi School of Mechanical and Aerospace Engineering Nanyang Technological University50 Nanyang AvenueSingapore 639798Singapore Advanced Remanufacturing and Technology Centre 3 CleanTech LoopCleanTech Two#01/01Singapore 637143Singapore

The effects of cold work produced by peening processes in residual stress relaxation under elevated temperatures were *** types of peening processes namely shot peening and laser peening were used to generate different amount of cold work and residual stresses in the *** of residual stress induced by cold working were carried out using X-ray diffraction coupled with electrochemical polishing method to measure the variation of residual stress with *** stresses in shot peened samples were observed to relax more rapidly than that of laser peened ones when subjected to thermal *** data collected from the experimental investigation was then used to build a correlation function to model the effects of cold work on residual stress relaxation.A parameter describing cold work’s contribution to stress relaxation is introduced into the well-known Zener-WertAvrami(ZWA)*** model was validated against experimental measurements and showed good agreement in both shot peened and laser peened samples.

关键词： Residual stress Cold work Surface treatment Nickel-based superalloys

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Simulation of clinker grinding circuits of cement plant based on process models calibrated using GA search method

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Journal of Central South University 2014年第2期21卷 799-810页

作者： A.Farzanegan E.Ghasemi ardi A.Valian V.Hasanzadeh School of Mining College of EngineeringUniversity of Tehran Department of Mining Faculty of EngineeringUniversity of Kashan

Particle size distributions of obtained samples from several sampling campaigns were determined and raw data were mass balanced before being used in simulation *** determination of breakage function,selection function,Bond work index,residence time distribution parameters,and Whiten's model parameters for air separators and diaphragms between the two compartments of tube ball mills,performance of the circuits was simulated for given throughputs and feed particle size ***'s model parameters were determined by GA(genetic algorithm) toolbox of MATLAB *** on implemented models for modeling and simulation,optimization of circuits was carried *** increased nearly 10.5% and 15.8% in fresh feed capacity input to each tube ball *** addition,circulating load ratios of circuits are modified to 118% and 127% from low level of 57% and 22%,respectively,and also cut points of air separators are adjusted at 30 and 40 μm from high range of 53 and 97 μm,*** applications helped in well-operation and energy consumption reduction of equipments.

关键词： cement plant clinker grinding genetic algorithm simulation optimization

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根据EVA测井资料的处理与解释评价地层特性

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国外测井技术 1989年第4期4卷 29-35页

作者： ardi.,PC 肖慈xun

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Hepatocellular carcinoma in elderly patients:a concise reviewon systemic therapy with sorafenib

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Hepatoma Research 2015年第1期1卷 58-62页

作者： Lombardi Giuseppe Vitale Alessandro Sara Lonardi Bellu Luisa Pambuku ardi Marsico Valentina Crivellari Gino Aliberti Camillo Cillo Umberto Zagonel Vittorina Department of Clinical and Experimental Oncology Medical Oncology 1Veneto Institute of Oncology-IRCCS35128 PaduaItaly Department of Surgery Oncology and GastroenterologyUniversity of Padua35122 PaduaItaly Interventional Oncology Unit Veneto Institute of Oncology-IRCCS35128 PaduaItaly

The treatment of hepatocellular carcinoma(HCC)in elderly patients is *** particular,the effi cacy and safety of sorafenib as a systemic treatment in these patients is still under *** performed a concise review of sorafenib therapy in this ***,it is important to make any decisions on treatment for elderly patients with HCC through a multidisciplinary team that includes experts in the liver *** with good clinical conditions should be treated with sorafenib.

关键词： Hepatocellular carcinoma sorafenib treatment chemotherapy elderly patients

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先进SSL系统可靠性预测框架（英文）

先进SSL系统可靠性预测框架（英文）

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第七届中国国际半导体照明论坛

作者： Cadmus Yuan L.J.M.G(ardi)Dortmans A.W.J.Gielen Sau Koh Willem van Driel 张国旗荷兰应用科学研究组织代尔夫特理工大学计算机系统和纳米电子学学院

The smart lifetime approach is to manipulate material system in SSL system to achieve the designed *** one of the basic building block of smart lifetime,we propose a system reliability prediction framework for solid state lighting（SSL）,which is capable of predicting the performance of system reliability as well as the component level failure *** framework is based on the advanced statistic approaches,and consists of three major building blocks:fault tree,Bayesian Belief Net（BBN） and Markov *** the booming of the professional energy conservation service company（ESCO） and energy management contract（EMC） business,the demand of system reliability prediction with the detail information of the component failure distribution is foreseen,and this framework will be helpful for ESCOs to make a robust system maintenance plan.

关键词： Smart Lifetime:System Reliability Markov chain/process Energy management contract(EMC)

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