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3rd International Conference on Inventions, ICI 2017

作者： Liu, Jui-Hung Chen, Jien-Chen Lai, Wen-Jhen Su, Wei-Niam Mechanical Engineering Dept. Southern Taiwan University of Science and Technology Taiwan Green Energy and Environment Lab. Industrial Technology Research Institute Taiwan Mechanical and System Engineering Program Institute of Nuclear Energy Research Taiwan

This paper shows the possibility of the output improvement to a large wind turbine, so the operator can earn more and thus reduce the overall cost of energy. For a modern wind turbine certificated by IEC or DNV-GL guidelines, a 20 years design lifetime is a base line. However, the efficiency of the turbine will degrade after 8 or 9 years' operating. Some components, especially the turning blade, the efficiency may vary due to the surface condition change. Meanwhile, the controller technology may also have been improved after years. So, the turbine can regain its original output or even have a better output performance through some adjustments. In this paper, a 2 MW wind turbine with different design and operating parameters like blade efficiency, wind direction alignment, high/low wind control strategy has been evaluated, then with the software DNV-GL BLADED simulation, to calculate the output differences and availability of the turbine. The result shown that a 3~5% yield annually can be obtained for each improved parameter in a 9 m/s mean wind speed situation. © The Authors, published by EDP sciences, 2018.

关键词： Wind turbines

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Bioprinting Methods for Fabricating In Vitro Tubular Blood Vessel Models

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Cyborg and Bionic systems 2023年第1期4卷 178-195页

作者： Seon-Jin Kim Min-Gyun Kim Jangho Kim Jessie SJeon Jinsoo Park Hee-Gyeong Yi Department of Rural and Biosystems Engineering College of Agriculture and Life SciencesChonnam National UniversityGwangjuRepublic of Korea Department of Convergence Biosystems Engineering College of Agriculture and Life SciencesChonnam National UniversityGwangjuRepublic of Korea Interdisciplinary Program in IT-Bio Convergence System Chonnam National UniversityGwangju 61186Republic of Korea Department of Mechanical Engineering Korea Advanced Institute of Science and TechnologyDaejeonRepublic of Korea Department of Mechanical Engineering Chonnam National UniversityRepublic of Korea

Dysfunctional blood vessels are implicated in various diseases,including cardiovascular diseases,neurodegenerative diseases,and *** studies have attempted to prevent and treat vascular diseases and understand interactions between these diseases and blood vessels across different organs and *** studies were conducted using 2-dimensional(2D)in vitro and animal ***,these models have difficulties in mimicking the 3D microenvironment in human,simulating kinetics related to cell activities,and replicating human pathophysiology;in addition,3D models involve remarkably high ***,in vitro bioengineered models(BMs)have recently gained *** created through biofabrication based on tissue engineering and regenerative medicine are breakthrough models that can overcome limitations of 2D and animal *** can also simulate the natural microenvironment in a patient-and target-specific *** this review,we will introduce 3D bioprinting methods for fabricating bioengineered blood vessel models,which can serve as the basis for treating and preventing various vascular ***,we will describe possible advancements from tubular to vascular ***,we will discuss specific applications,limitations,and future perspectives of fabricated BMs.

关键词： Blood organs printing

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Effect of injection molding conditions on mold adhesion force during thermoplastic polyurethane injection molding

Effect of injection molding conditions on mold adhesion forc...

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2018 Society of Plastics Engineers Annual Technical Conference, ANTEC 2018

作者： Chen, Jian-Yu Huang, Ming-Shyan Nian, Shih-Chih Bachelor Program of Precision System Design Feng Chia University Taiwan Dept. of Mechanical and Automation Engineering National Kaohsiung First University of Science and Technology Taiwan Dept. of Power Mechanical Engineering National Taitung College Taiwan

Injection molding is one of the most common methods for the mass production of plastic products with complex geometries. However, while injection molding is a highly convenient and cost-effective method, some problems still remain, including warpage, quality variations, surface defects, insufficient physical properties of the finished parts, and so on. During the ejection stage, one of the most serious problems is that of sticking at the interface between the molded part and the cavity surface. The adhesion force inhibits the release of the molded part from the mold surface, and can lead to serious defects, such as distortion and cracking. The adhesion phenomenon is particularly common in the injection molding of thermoplastic polyurethane (TPU). Numerous factors affect the intensity of the mold adhesion force, including the injection molding conditions, the surface morphology, the surface modification conditions, and the rheological properties of the molten polymer. To clarify the effect of the molding conditions on the mold adhesion level, the present study uses a tensile mode mold adhesion tester to measure the adhesion force for various values of the mold temperature, melt temperature and injection speed. In addition, the surface free energy (SFE) of the molded parts is measured in order to better understand the correlation between the wettability and the processing conditions. © 2018 Society of Plastics Engineers. All rights reserved.

关键词： Injection molding

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Online measurement of polymer melt viscosity in injection molding 75

Online measurement of polymer melt viscosity in injection mo...

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75th Annual Technical Conference and Exhibition of the Society of Plastics Engineers, SPE ANTEC Anaheim 2017

作者： Huang, Ming-Shyan Nian, Shih-Chih Chen, Jian-Yu Yang, Kai-Jye Tseng, Jian-Chou Dept. of Mechanical and Automation Engineering National Kaohsiung First University of Science and Technology Taiwan Dept. of Power Mechanical Engineering National Taitung College Taiwan Bachelor Program in Precision System Design Feng Chia University Taiwan

ISBN: (纸本)9780692883099

Melt viscosity, determined by the shear rate, barrel temperatures, and pressure during plasticization, greatly affects the flow ability of polymer melts as well as the quality of injection-molded parts. In particular, the consistency of molding qualities is highly relevant to the plasticizing quality at each cycle (i.e., injection molding requiring a high yield rate highly relies on the stability of polymer melts). However, numerous factors affect the plasticizing quality, including the geometry of injection screws, processed polymer materials, processing parameters of plasticization such as the feeding rate, screw rotational speed, barrel temperatures, back pressure, and screw backward speed. The conventional approach of plasticization in injection molding machines uses a single reciprocating screw for conveying, melting, and metering polymer melts. The plasticizing quality is roughly adjusted by indirectly controlling barrel temperatures;thus, the melt viscosity varies. An in-suit approach of assuring melt quality is to measure the melt viscosity variation online, which is a more suitable indicator of the plasticizing quality than temperature. This study thus monitored the melt viscosity variations in polymer melts by using in-mold pressure sensors. Furthermore, the effects of the injection velocity and mold temperature on the melt viscosity variations were examined.

关键词： Polymer melts

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Mobile Sleep Stage Analysis Using Multichannel Wearable Devices Integrated with Stretchable Transparent Electrodes

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ACS Sensors 2025年 2025 May 15页

作者： Um, Hyun-Kyung Noh, Eunseo Yoo, Chaehwa Lee, Hyang Woon Kang, Je-Won Lee, Byoung Hoon Lee, Jung-Rok Department of Mechanical and Biomedical Engineering Ewha Womans University Seoul 03760 South Korea Graduate Program in Smart Factory Ewha Womans University Seoul 03760 South Korea Department of Chemical Engineering and Materials Science Ewha Womans University Seoul 03760 South Korea Graduate Program in System Health Science and Engineering Ewha Womans University Seoul 03760 South Korea School of Electrical Engineering Chungbuk National University Cheongju 28644 South Korea Department of Neurology and Medical Science School of Medicine Ewha Womans University Seoul 03760 South Korea Ewha Medical Research Institute Ewha Womans University Seoul 03760 South Korea Department of Electronic and Electrical Engineering Ewha Womans University Seoul 03760 South Korea

The prevalence of sleep disorders in the aging population and the importance of sleep quality for health have emphasized the need for accurate and accessible sleep monitoring solutions. Polysomnography (PSG) remains the clinical gold standard for diagnosing sleep disorders;however, its discomfort and inconvenience limit its accessibility. To address these issues, a wearable device (WD) integrated with stretchable transparent electrodes (STEs) is developed in this study for multisignal sleep monitoring and artificial intelligence (AI)-driven sleep staging. Utilizing conductive and flexible STEs, the WD records multiple biological signals (electroencephalogram [EEG], electrooculogram [EOG], electromyogram [EMG], photoplethysmography, and motion data) with high precision and low noise, comparable to PSG (<4 μV_RMS). It achieves a 73.2% accuracy and a macro F1 score of 0.72 in sleep staging using an AI model trained on multisignal inputs. Notably, accuracy marginally improves when using only the EEG, EOG, and EMG channels, which may simplify future device designs. This WD offers a compact, multisignal solution for at-home sleep monitoring, with the potential for use as an evaluation tool for personalized sleep therapies. © 2025 American Chemical Society.

关键词： biopotential signals deep-learning algorithm electroencephalography sleep stage analysis stretchable transparent electrodes wearable devices

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Behavior of plane synthetic jets generated by an asymmetric stepped slot

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International Journal of Fluid Machinery and systems 2020年第1期13卷 253-265页

作者： Kobayashi, Ryota Terakado, Hiroaki Sato, Kotaro Taniguchi, Junya Nishibe, Koichi Yokota, Kazuhiko Mechanical Engineering Program in the Graduate School of Engineering Kogakuin University 1-24-2 Nishi-Shinjuku Shinjuku-ku Tokyo163-8677 Japan Mechanical Engineering Program in the Graduate School of Engineering Kogakuin University 1-24-2 Nishi-Shinjuku Shinjuku-ku Tokyo163-8677 Japan Department of Mechanical System Engineering Kogakuin University 1-24-2 Nishi-Shinjuku Shinjuku-ku Tokyo163-8677 Japan Graduate School of Integrative Science and Engineering Tokyo City University 1-28-1 Tamatsuzumi Setagaya-ku Tokyo158-8557 Japan Department of Mechanical Engineering Tokyo City University 1-28-1 Tamatsuzumi Setagaya-ku Tokyo158-8557 Japan Department of Mechanical Engineering Aoyama Gakuin University 5-10-1 Fuchinobe Sagamihara-shi Kanagawa252-5258 Japan

This paper presents a fundamental study of jet directional control, i.e., thrust vectoring, using a synthetic jet generated by an asymmetric stepped slot. We present and discuss the results for a synthetic jet generated by a one-sided asymmetric stepped slot and focus on the relationship between the traveling direction of the formed jet and the offset ratio of the stepped slot and/or dimensionless frequency of the synthetic jet, within a jet deflection angle range of 0–90°. We demonstrate that there is an optimum offset ratio for jet deflection under the same dimensionless frequency because the traveling direction of the synthetic jet is dependent on the offset ratio of the stepped slot and the dimensionless stroke length (dimensionless frequency). © 2020, Turbomachinery Society of Japan. All rights reserved.

关键词： Jets

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Rotor load analysis method for twin Screw compressors with considering gaseous pressure and working temperature 14

Rotor load analysis method for twin Screw compressors with c...

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14th International Federation for the Promotion of Mechanism and Machine science World Congress, IFToMM 2015

作者： Hsu, Ruei-Hung Wu, Yu-Ren Wu, Wei-Te Tran, Van-The Bachelor's Program in Precision System Design Feng Chia University Taichung Taiwan Department of Mechanical Engineering National Central University Taoyuan Taiwan Department of Biomechatronics Engineering National Pingtung University of Science and Technology Pingtung Taiwan

ISBN: (纸本)9789860460988

Screw rotors of a twin screw compressor often deform and interfere due to the cyclic gas pressure and working temperature, which lead to noise, vibration and abrasion of the screw rotors. Therefore, this paper proposed a simplified CAE (Computer Aided engineering) method instead of the past massive and complex CFD (Computational Fluid Dynamics) method to simulate and estimate reasonably the screw rotor load and deformation with considering the gas pressure and working temperature applied on its operating process. The analysis results could provide the possible maximum rotor deformation and cyclic load acting on the rotors for design consideration.

关键词： Deformation

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Integrating artificial neural networks and cluster analysis to assess energy efficiency of buildings

Integrating artificial neural networks and cluster analysis ...

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IIE Annual Conference and Expo 2014

作者： Aqlan, Faisal Ahmed, Abdulaziz Srihari, Krishnaswami Khasawneh, Mohammad T. Industrial and System Engineering Program Department of Mechanical Civil and Environmental Engineering University of New Haven West HavenCT06516 United States Department of Systems Science and Industrial Engineering State University of New York at Binghamton BinghamtonNY13902 United States

ISBN: (纸本)9780983762430

Energy consumption of buildings worldwide has steadily increased over the past couple of decades. Furthermore, energy performance of buildings is one of the factors that contribute to energy waste and its perennial adverse impact on the environment. This paper presents a data mining approach for assessing the heating and cooling requirements of residential buildings. The proposed approach combines Artificial Neural Networks (ANNs) and cluster analysis to assess and predict the heating and cooling energy efficiency of residential buildings. The ANN-based model uses eight input variables (i.e., relative compactness, surface area, wall area, roof area, overall height, orientation, glazing area, and glazing area distribution) to predict both the heating and cooling loads of residential buildings. Buildings are then clustered based on the output variables using the K-means clustering method. The proposed approach is used to assess and evaluate 768 diverse residential buildings based on simulated literature data. The research results showed that the proposed approach can effectively predict the heating and cooling requirements of residential buildings based on the input variables considered with a very high level of accuracy.

关键词： Energy efficiency

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Multifunctional stimuli responsive polymer-gated iron and gold-embedded silica nano golf balls:Nanoshuttles for targeted on-demand theranostics

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Bone Research 2017年第4期5卷 343-356页

作者： Liping Wang Grace Jang Deependra Kumar Ban Vrinda Sant Jay Seth Sami Kazmi Nirav Patel Qingqing Yang Joon Lee Woraphong Janetanakit Shanshan Wang Brian P Head Gennadi Glinsky Ratneshwar Lai School of Biomedical Engineering Shanghai Jiaotong UniverityShanghaiChina Department of Mechanical and Aerospace Engineering La JollaCAUSA Materials Science and Engineering Program La JollaCAUSA Department of Nanoengineering La JollaCAUSA Department of Chemical Engineering University of California San DiegoLa JollaCAUSA Departrnenf of Bioengineering La JollaCAUSA Department of Anesthesiology La JollaCAUSA Veterans Affairs San Diego Healthcare System San DiegoCAUSA Institute of Engineering in Medicine La JollaCAUSA

Multi-functional nanoshuttles for remotely targeted and on-demand delivery of therapeutic molecules and imaging to defined tissues and organs hold great potentials in personalized medicine, including precise early diagnosis, efficient prevention and therapy without toxicity. Yet, in spite of 25 years of research, there are still no such shuttles available. To this end, we have designed magnetic and gold nanoparticles （NP）-embedded silica nanoshuttles （MGNSs） with nanopores on their surface. Fluorescently labeled Doxombicin （DOX）, a cancer drug, was loaded in the MGNSs as a payload. DOX loaded MGNSs were encapsulated in heat and pH sensitive polymer P（NIPAM-co- MAA） to enable controlled release of the payload. Magnetically-guided transport of MGNSs was examined in：（a） a glass capillary tube to simulate their delivery via blood vessels; and （b） porous hydrogels to simulate their transport in composite human tissues, including bone, cartilage, tendon, muscles and blood-brain barrier {BBB）. The viscoelastic properties of hydrogels were examined by atomic force microscopy （AFM）. Cellular uptake of DOX- loaded MGNSs and the subsequent pH and temperature-mediated release were demonstrated in differentiated human neurons derived from induced pluripotent stem cells （iPSCs） as well as epithelial HeLa cells. The presence of embedded iron and gold NPs in silica shells and polymer-coating are supported by SEM and TEM. Fluorescence spectroscopy and microscopy documented DOX loading in the MGNSs. Time-dependent transport of MGNSs guided by an external magnetic field was observed in both glass capillary tubes and in the porous hydrogel. AFM results affirmed that the stiffness of the hydrogels model the rigidity range from soft tissues to bone. pH and temperature-dependent drug release analysis showed stimuli responsive and gradual drug release. Cells＇ viability MTT assays showed that MGNSs are non-toxic. The cell death from on-demand DOX release was observed in both neurons and ep

关键词： Multifunctional stimuli responsive polymer-gated iron

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Responsiveness Improvement of Idling Speed Control for Automotive Using SMC

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Journal of Software engineering and Applications 2009年第5期2卷 309-315页

作者： Yang ZHANG Nobuo KURIHARA Hiroyuki YAMAGUCHI Doctor of Science Program in Mechanical Systems Hachinohe Institute of Technology Graduate School of Engineering Hachinohe Institute of Technology Department of System and Information Hachinohe Institute of Technology

To improve the responsiveness of engine speed control to disturbances, robust controls were investigated by simulation. The intake air control system of a gasoline engine is a typical nonlinear system, and the disturbances and parameter perturbations are generally regarded as being the unstable factors with regard to engine control. In this paper, a Mean-Value Engine Model (MVEM) with disturbances and parameter perturbations is investigated using Sliding Mode Control (SMC), which is a form of variable structure control, with a view to address instability in the idle speed control process. The simulation results confirmed that, compared with a conventional PI (Proportional-Integral) controller, the stability of the idle speed for an engine that is being subjected to disturbances, parameter variations and background noise is greatly improved by the application of SMC.

关键词： Gasoline Engine Intake Air Control Sliding Mode Control Simulation

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