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Characteristics of GaInAsP/SOI Hybrid Semiconductor Optical Amplifier with InP-based Two-storied ridge Structure 27

Characteristics of GaInAsP/SOI Hybrid Semiconductor Optical ...

27th OptoElectronics and Communications Conference/International Conference on Photonics in Switching and Computing, OECC/PSC 2022

作者： Makihara, Yutaka Nishiyama, Nobuhiko Kikuchi, Takehiko Hiratani, Takuo Fujiwara, Naoki Inoue, Naoko Nitta, Toshiyuki Eissa, Moataz Mitarai, Takuya Wang, Yuning Oiso, Yoshitaka Amemiya, Tomohiro Yagi, Hideki Dept. of Electrical and Electronic Engineering Tokyo Institute of Technology Meguro-ku152-8550 Japan Institute of Innovative Research Tokyo Institute of Technology Meguro-ku152-8550 Japan Sumitomo Electric Industries Inc. Yokohama Works Transmission Devices R&d Labs 1 Taya-cho Sakae-ku Yokohama Kanagawa Yokohama244-8588 Japan Optoelectronics Industry and Technology Development Association Sumitomo Edogawabashiekimae Bldg.7F 1-20-10 Sekiguchi Bunkyo-ku Tokyo112-0014 Japan

GaInAsP/SOI hybrid SOAs with the InP-based two-storied ridge structure fabricated by the room temperature surface activated bonding were demonstrated. The wavelength dependence of gain was within 4.0 dB for the wavele... 详细信息

ISBN: (数字)9784885523366

ISBN: (纸本)9784885523366

关键词： Indium phosphide

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Numerical Simulation of Slotted Screen Plugging Mechanism Based on Cfd-dem Coupling

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SSrN 2022年

作者： deng, Fucheng Gao, Zhiwei Cao, Yanfeng deng, Junyu Shen, Xuefeng School of Mechanics Engineering Yangtze University Hubei Jingzhou434000 China CNOOC Research Institute Beijing100028 China CNPC Engineering Technology R&D Company Limited Tianjin300457 China China Petroleum Technology and Development Corporation Beijing100028 China

As the simplest and commonly used mechanical sand control method in well completion, slotted screen sand control is used for filling sand control, independent sand control in thermal production wells or geothermal wells. In order to explore the plugging mechanism of slotted screen and the factors affecting sand production during sand control, the CFd-dEM coupling method is used in this paper. The discrete element method is used to establish the model considering the physical properties of sand particles in the formation, and the fluid flow model is established combined with the finite volume method, and the full coupling solution of the two is realized and the model verification is completed. The effects of particle size distribution, sand concentration, slotted size and fluid velocity on slotted screen plugging are studied, and the plugging mechanism of slotted screen is revealed. The following research results are obtained. First, the retention form of sand particles at the screen gap is the fundamental factor affecting screen plugging. Sand bridging will have a certain probability of collapse, resulting in "false stability". Second, the proportion of larger diameter sand determines the formation time and stability of "sand bridge", and the proportion of smaller diameter sand determines the compactness of solid retention. Third, sand concentration is very important to control the plugging removal frequency of screen. Fourth, the gap size and fluid velocity affect the pressure difference on the screen surface and the stability of the "sand bridge". This study provides a reference for optimizing the selection and production control of slotted screen during the downhole sand control design. © 2022, The Authors. All rights reserved.

关键词： Sand

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Microstructural Control Strategy Based on Optimizing Laser Powder Bed Fusion for different Hastelloy X Powder Size

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SSrN 2022年

作者： Jang, Jee Eun Kim, Woosung Sung, Ji-Hyun Kim, Young-Joo Park, Sung Hyuk Kim, da Hye Smart Manufacturing Technology R&D Group Korea Institute of Industrial Technology Daegu42994 Korea Republic of School of Materials Science and Engineering Kyungpook National University Daegu41566 Korea Republic of Development Institute Plant Technology Group KEPCO KPS Global Institute of Technology Jeollanam-do 58326 Korea Republic of

In additive manufacturing, the powder properties and laser powder bed fusion (LPBF) process parameters, influence the quality of materials and stacking parts. We compared the LPBF window process maps for two Hastelloy X (HX) powders of different sizes. despite their small difference in particle size, the properties showed extreme sensitivity to LPBF process parameter optimization and material properties. For increasing HX particle size, the energy density of the optimal process conditions increased. The as-built specimen had a larger molten-pool size as the energy density was higher, which resulted in the differences in mechanical properties at room temperature and high temperature. The microstructures and mechanical properties of the as-built LPBF specimens were also investigated and compared with those of cast HX. Because of the rapid melting and solidification processes in LPBF, the as-built HX exhibited nano-sized dendrite structures and large internal strain energy. This resulted in the as-built LPBF exhibiting a higher room-temperature tensile strength than the cast material. Under high-temperature conditions, the molten-pool boundary of the as-built LPBF acts as a grain boundary sliding path, and the as-built LPBF HX showed significantly better high-temperature tensile strength characteristics than the cast HX. © 2022, The Authors. All rights reserved.

关键词： 3d printers

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Coupling mechanism of THM fields and SLG phases during the gas extraction process and its application in numerical analysis of gas occurrence regularity and effective extraction radius

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Petroleum Science 2022年第3期19卷 990-1006页

作者： Hui-Huang Fang Chun-Shan Zheng Ning Qi Hong-Jie Xu Hui-Hu Liu Yan-Hui Huang Qiang Wei Xiao-Wei Hou Lei Li Shuai-Liang Song State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines Anhui University of Science and TechnologyHuainanAnhui 232001China Institute of Energy Hefei Comprehensive National Science CenterHefeiAnhui 230000China School of Earth and Environment Anhui University of Science and TechnologyHuainanAnhui 232001China Great Institute of Standardization China National Institute of Standardization's High Quality and Green Development Innovation R&D BaseJinanShandong 250101China State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing102249China School of Resources and Civil Engineering Suzhou UniversitySuzhouJiangsu 234000China School of Resources and Environmental Engineering Hefei University of TechnologyHefeiAnhui 230009China The Third Exploration Team of Shandong Coalfield Geologic Bureau TaianShandong 250102China Shandong Provincial Lunan Geo-engineering Exploration Instituts JiningShandong 272100China

The analysis of the coupling mechanism of thermal-hydraulic-mechanical(THM)fields,and solid-liquidgas(SLG)phases during gas extraction process is of profound significance to explore its numerical application in the gas occurrence regularity and its effective extraction *** this study,the Hudi coal mine in Qinshui basin is taken as the research area,the influencing factors of gas occurrence were analyzed,the differences in overburden load for gas pressure distribution and the factors influencing the effective extraction radius were further discussed by using the COMSOL *** results show that the derivation of mathematical model in gas extraction shows that the process is a process the THM fields restrict each other,and the SLG phases influence each *** longer the extraction time,the larger the influencing range of borehole,and the better the extraction *** larger the diameter of borehole,the larger the effective extraction radius,and the influence on gas extraction effect is smaller in the early stage and larger in the late *** borehole arrangement should be flexibly arranged according to the actual extraction *** higher the porosity,the higher the permeability,the better the gas extraction *** larger the overburden load of reservoir,the stronger the effective stress,which will result in the more severe the strain,and the closure of pore and fracture,which in turn will lead to the decrease of permeability and slow down the gas *** relationship among extraction time,borehole diameter,negative pressure of gas extraction,permeability with effective extraction radius is *** study has important theoretical and practical significance for clarifying and summarizing the gas occurrence regularity and its engineering practice.

关键词： Gas occurrence regularity Effective extraction radius THM fields and SLG phases Numerical simulation COMSOL Multiphysics Hudi coal mine

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research on FSI dynamic characteristics of parafoil trailing edge deflection 32

Research on FSI dynamic characteristics of parafoil trailing...

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32nd Congress of the International Council of the Aeronautical Sciences, ICAS 2021

作者： Gao, Xinglong Zhang, Qingbin Li, Zhihui Chen, Qin Wang, Wenkai State Aerodynamic Key Laboratory China Aerodynamic R&D Center Mianyang621000 China College of Aerospace Science and Technology National Defense Technology University Changsha430100 China Beijing Pioneering Innovation Center of China Aerodynamics Research and Development Center Beijing100191 China Technology Center AVIC Aerospace Life-Support Industries. Ltd Xiangfan441001 China

ISBN: (纸本)9783932182914

The parafoil is manipulated by pulling the trailing edge to realize maneuvering, turning, and landing etc., which involves the coupling process between the flexible fabric structure and aerodynamics. Based on the transient nonlinear dynamics' method, the FSI dynamic behaviors of trailing edge deflection is numerically simulated and analyzed. The Structured-ALE (SALE) models algorithm as well as the penalty method are both utilized to modeling the coupling fields and interface, by which the computing efficiency is highly improved. The stress distribution and structure strength of canopy is visualized and analyzed, the surrounding flow field is also visualized in 3d, the evolution mechanisms such as flow separation are studied. At last, the influence of deflection angle as well as the turning position on FSI dynamic characteristics are comparatively analyzed. The results validated the efficiency of our method and could be a good support for the design and application of large parafoil. © 2021 32nd Congress of the International Council of the Aeronautical Sciences, ICAS 2021. All rights reserved.

关键词： Efficiency

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Green synthesis of multifunctional carbon dots for anti-cancer and anti-fungal applications

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Chinese Journal of Chemical Engineering 2021年第9期34卷 97-104页

作者： Shaojing Zhao Li Huang Yong Xie Bin Wang Feng Wang Minhuan Lan Hunan Provincial Key Laboratory of Micro&Nano Materials Interface Science College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China State Key Laboratory of the Discovery and Development of Novel Pesticide Shenyang Sinochem Agrochemicals R&D Co.Ltd.Shenyang 110021China Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education Hubei Key Laboratory of Material Chemistry and Service FailureSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074China

Carbon dots(Cds)have become popular nanomaterials in biomedical and agricultural *** we synthesized multifunctional Cds which showed anti-cancer and anti-fungal *** low cytotoxicity,stable fluorescence and high photothermal conversion efficiency enable the Cds with imagingguided photothermal *** Cds also exhibited intrinsic anti-fungal activity even at a low concentration,i.e.,40 mg·L^(-1) of Cds induced 20%mortality in cucumber downy ***,the largeπ-conjugated nanostructure and the richness of amino and hydroxyl groups make them a powerful delivery platform for flumorph(a fungicide)with a high loading efficiency of 47.18%.Meanwhile,the heat converted from the light can accelerate the release of flumorph from Cds,and thus efficiently kill fungus.

关键词： Carbon dots Photothermal therapy Anti-fungus delivery Pesticide

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Novel Gender and Age Prediction from real Time Facial Images using Linear regression Algorithm

Novel Gender and Age Prediction from Real Time Facial Images...

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International conference of Electronics, Communication and Aerospace technology (ICECA)

作者： Nalini N d. Ferlin deva Shahila A. rosi M. Tamilselvi Jayant Giri Ala’a Al Sherideh Department of ECE Vel Tech Rangarajan Dr.Sagunthala R&D Institute of Science and Technology Chennai Department of ECE Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences (SIMATS) Saveetha University Chennai Department of Mechanical Engineering Yeshwantrao Chavan College of Engineering Nagpur India Division of Research and Development Lovely Professional University Phagwara India Department of Cyber Security College of Information Technology Zarqa University zarqa jordan University of Business and Technology Jeddah Saudi Arabia

ISBN: (数字)9798350367904

ISBN: (纸本)9798350367911

The proposed novel algorithm utilizes linear regression in real-time facial image analysis for predicting both gender and age. By leveraging features extracted from facial data, the model aims to provide accurate and instantaneous predictions. The emergence of social media platforms has made the automatic classification of gender and age increasingly relevant. real-time frame processing is possible with OpenCV. The expected gender and age are provided as the output, and this frame is provided as the input. The capacity to autonomously ascertain age and gender from facial images because of its versatility in facial analysis applications. However, the current models are still behind the required accuracy level, which is required for these models to be used in real-world applications, because of the significant intraclass variance of face images (such as difference in lighting, position, scale, and occlusion). In this work, a deep learning framework uses an ensemble of residual and attentional convolutional networks to reliably determine the gender and age group of facial photographs. By employing an attention mechanism, this model can concentrate on the important and instructive aspects of the face, increasing its prediction accuracy to 90.15%.

关键词： Accuracy Social networking (online) Linear regression Training data Predictive models Prediction algorithms Feature extraction real-time systems data models Faces

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Blockchain technology for Enhanced Transparency, Efficiency, and Security in Supply Chain Management

Blockchain Technology for Enhanced Transparency, Efficiency,...

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Automation, Computing and renewable Systems (ICACrS), International Conference on

作者： Santhosh Krishna B V M. Vanitha Lakshmi S Sathyanarayanan Balaji L Harshith C M S. Kaliappan Computer Science and Engineering New Horizon College of Engineering Bangalore India Department of ECE School of Engineering Presidency University Bengaluru Sri Sathya Sai University for Human Excellence Gulbarga Karnataka Dept of ECE School of Electrical and Communication Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology Chennai Division of Research and Development Lovely Professional University Punjab

ISBN: (数字)9798331532420

ISBN: (纸本)9798331532437

Though innovation in barcodes, GPS, and IoT sensors has enhanced the scope of modern supply chains to track assets to a larger extent, it raises a critical challenge for centralized systems in terms of data breaches, unauthorized access, and manipulation. Blockchain technology serves as an optimum decentralized and tamper-proof solution for further improvement of data integrity, security, and transparency. This paper discusses the integration of blockchain into supply chains its benefits and challenges and its potential to change global supply chain operations at its very core. In a nutshell, the system proposed outlines a blockchain-based framework using IoT, GPS, and smart contracts that guarantee traceability, security, and efficiency throughout the supply chain in real time. The results are showing high improvement in transparency, security, and operational efficiency, which will certainly lead to its usage cases in varied sectors.

关键词： Technological innovation Supply chain management data integrity Supply chains Smart contracts Transforms Blockchains Security Stakeholders Global Positioning System

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Numerical study on stress wave and viscosity dominated dynamic fracture in granular material 27

Numerical study on stress wave and viscosity dominated dynam...

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27th International Congress on Sound and Vibration, ICSV 2021

作者： dong, Jingnan Wang, Xiangyang Zhao, Zhigang Zhu, Feifei Liu, Yifan Qiao, Lei CNPC Engineering Technology R&D Company Limited Beijing102206 China China National Petroleum Corporation Jilin Oilfield Songyuan Gas Production Plant China Equipment Monitoring Center Zhongyuan Oil Field Branch Sinopec Sinopec Star Henan New Energy Development Co. Ltd

ISBN: (纸本)9788378807995

Wave propagation plays an important role in the propagation of dynamic fracture. Inertia force, rate-dependent behaviour, and stress waves are three primary features present in the dynamic fracture. In this studied, the viscosity behaviour and reflected stress waves in the dynamic crack of granular material are investigated using particle flow code. A series of dynamic fracture simulations are performed based on a double cantilever beam configuration. Energy transition, crack growth length, and crack velocity during the dynamic crack propagation are investigated. results show that under certain circumstances, the crack propagates in a jumping manner in dCB specimen as the reflected stress waves reinitiate and accelerate the crack several times. However, the reflected stress waves only trigger the re-initiation. Most of the driving force comes from the bond break of the contacts. The viscosity damping force significantly reduces the crack velocity. The maximum crack velocity in the viscosity-free system is as high as 0.96 times the rayleigh wave speed. Whereas under the same normalized initial input energy, the maximum crack velocity in the critically damped system is only half the maximum crack velocity in the viscosity-free system. Most of the viscosity energy is dissipated in the vicinity of the running crack. The stress wave propagation in the relatively far field only dissipates a very small amount of the total energy compared to the energy dissipated in the vicinity of the crack during propagation. The surface energy has a positive correlation with the crack velocity, which is significantly reduced by viscosity damping force. The simulation provides a better understanding of the stress wave and viscosity dominated dynamic crack propagation of granular material. © "Advances in Acoustics, Noise and Vibration - 2021" Proceedings of the 27th International Congress on Sound and Vibration, ICSV 2021. All rights reserved.

关键词： Viscosity

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Influence Of Microstructural Assemblage Of Substrate On The Adhesion Strength Of Tisin Coated Pcbn Systems

Influence Of Microstructural Assemblage Of Substrate On The ...

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World PM 2022 Congress and Exhibition

作者： Gordon, Sandra Jiménez-Piqué, Emilio rodriguez-Suarez, Teresa M'Saoubi, rachid roa, Joan Josep Franca, Luis F.P. Llanes, Luis CIEFMA - Department of Materials Science and Engineering EEBE Universitat Politècnica de Catalunya Barcelona08019 Spain Barcelona Research Center in Multiscale Science and Engineering Universitat Politècnica de Catalunya BarcelonaTech Barcelona08019 Spain Ltd Global Innovation Centre Fermi Avenue OxfordshireOX11 0QR United Kingdom R&D Material and Technology Development Seco Tools AB Fagersta73782 Sweden

ISBN: (纸本)9781899072552

The coating adhesion strength of two TiSiN-coated polycrystalline cubic boron nitride (PcBN) grades is studied in this work. Microstructural assemblage of the PcBN substrate, described in terms of cBN content, binder chemical nature and average cBN grain size, is considered as the main experimental variable. In the present investigation a conical indentation test method is implemented to assess load levels at which cracking and delamination emerge, and their evolution with increasing load. Tests were conducted by using a conical diamond indenter of 200 µm in radius (rockwell C) and applying loads ranging from 98 to 980 N. They were complemented by an extensive and detailed SEM inspection of fracture micro-mechanisms (i.e. type of cracking pattern and delamination). results show that emergence and evolution of damage strongly depend on the substrate microstructural assemblage: the higher the cBN-content, the more resistant to both cracking and delamination is the coated system. © European Powder Metallurgy Association (EPMA)

关键词： Bond strength (materials)

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