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International Conference on Power and Energy technology (ICPET)

作者： Honglian Zhou Wenyu Hu Lei Zhang Feng Li Chunshuang Li Yin Liu Lingjun Song State Grid Xinjiang Power Co. Economic and Technical Research Institute China School of Vehicle and Mobility Tsinghua University Beijing China New Energy Power Generation Department Xinjiang Huadian Reed Lake Liang New Energy Co. China Power Electronics R&D Department TBEA Technology Investment Co. China Toshkent River Hydropower Branch Huaneng Xinjiang Energy Development Co. China

ISBN: (数字)9798350375855

ISBN: (纸本)9798350375862

In response to the issue of energy supply instability that arises from the widespread adoption of distributed renewable energy resources at the user-end in the future, a dC microgrid system and control method based on distributed hydrogen energy storage are presented. Firstly, the mathematical models of photovoltaic power generation, electrochemical energy storage, and electrolyzer-hydrogen storage tank-fuel cell hydrogen energy storage system are established. Secondly, the components are coupled to establish an integrated dC microgrid system. Finally, based on the control objective of dC bus voltage stabilization, the corresponding control strategy is proposed. According to different fluctuation situations, the effects on the system and the effectiveness of the control strategy are analyzed when the input or load fluctuate.

关键词： Photovoltaic systems renewable energy sources Hydrogen storage Fluctuations Hydrogen Microgrids Control systems Stability analysis Mathematical models Voltage control

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2.2d die last Integrated Substrate for High Performance Applications

2.2D Die last Integrated Substrate for High Performance Appl...

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Electronic Components and technology Conference (ECTC)

作者： dyi Chung Hu Er Hao Chen Jeffrey ChangBing Lee Chia Peng Sun Chih Chung Hsu SiPlus Co. Hsinchu Taiwan R.O.C. Global Engineering Development Division Integrated Service Technology Inc. Hsinchu Taiwan R.O.C. Product R&D Division CoreTech System (Moldex3D) Chupei Taiwan R.O.C. R&D I Division CoreTech System (Moldex3D) Chupei Taiwam R.O.C.

In this work, a new integrated substrate structure “2.2d” is demonstrated. 2.2d substrate is a true die last solution. This solution used thin film rdL directly bonded to the substrate. This simplifies the 2.5d structure and further reduces the cost and improves the product cycle time. In this work, the 2.2d test vehicle is demonstrated with two metal layers of thin film that is bonded to a ceramic substrate. Serpentine lines run from thin film rdL to the substrate were evaluated. The process developed in this study demonstrates good registration between thin film rdL and substrate. The 2.2d TV demonstrates good warpage behavior up to the solder reflow temperature. The 2.2d structure shows good potential to be used for high performance computing substrate.

关键词： Temperature distribution Mass production Electric potential TV High performance computing Metals Electronic components

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Corrosion resistance and conductivity behavior of Cr-Al-N MAX phase coatings prepared by magnetron sputtering technology

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Thin Solid Films 2024年 793卷

作者： Su, Y.L. Kao, W.H. Horng, J.H. Hsueh, H.C. Cian, Y.C. Hsieh, T.C. Department of Mechanical Engineering National Cheng Kung University Tainan701 Taiwan Department of Automation Engineering & Institute of Mechatronoptic Systems Chienkuo Technology University Changhua500 Taiwan Department of Power Mechanical Engineering National Formosa University Yunlin633 Taiwan Smart Machine and Intelligent Manufacturing Research Center National Formosa University Yunlin633 Taiwan Micro/Meso Mechanical Manufacturing R&D Department Surface Engineering & Heat Treatment Section Metal Industries Research and Development Centre Kaohsiung811 Taiwan

Chromium aluminum nitride (CrAlN) coatings containing Cr2AlN phase were prepared by unbalanced magnetron sputtering followed by annealing at 1000 °C. The crystal structures, X-ray diffraction patterns, and selected area electron diffraction patterns of the Cr2AlN phase were modeled using computer software and compared with experimental observations. A good agreement was found between the two sets of results, thereby confirming the presence of Cr2AlN phase in the coatings. While previous studies have demonstrated the formation of Cr2AlN phase theoretically, this study presents experimental evidence of its physical existence. The potentiodynamic polarization results and interfacial contact resistance measurements show that the CrAlN coating with Cr2AlN phase has excellent corrosion resistance (a corrosion current density of 5.35 × 10−7 A/cm2 and electrical conductivity of 5.5 mΩ·cm2) and is thus a promising candidate for the protection of fuel cell bipolar plates. © 2024 Elsevier B.V.

关键词： Chromium compounds

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Experimental study on the creep behavior of shale in uniaxial compression test 54

Experimental study on the creep behavior of shale in uniaxia...

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54th U.S. rock Mechanics/Geomechanics Symposium

作者： Gao, dewei Yang, Henglin dong, Jingnan Chen, Mian Hou, Yanan Li, Jun Sichuan Changning Natural Gas Development Co. LTD Chengdu China CNPC Engineering Technology R&D Company Limited Beijing China Beijing China China University of Petroleum-Beijing Beijing China

In oil and gas well engineering, shale creep plays an important role in both the borehole stability and the crack closure of the after-fracturing process. In this study, the creep behavior of matrix shale in uniaxial compression test is experimentally examined. Both uniaxial compression tests and uniaxial compression creep tests are conducted on small-scale specimens using Gatan micro-testing system. Several constant-load stages are carried out before the stress raise above the threshold. The results show that the matrix shale have a creep threshold, below which the specimens exhibit distinct primary creep stage and secondary creep stage. Above the threshold, the specimen is in accelerated stage, in which the creep strain increased in an exponential manner. results also show that the specimens of regular uniaxial compression strength tests conducted within several minutes exhibited one main crack, which dominated the failure pattern. The specimens of creep tests that are conducted over tens of hours are crushed into lots of fine parts. The development of micro cracks dominates in the creep tests. The comparison between uniaxial compressive strength and creep threshold value show that the threshold value may be higher than the UCS value if the specimen is in constant-load mode for tens of hours. The results are limited to USC tests because the propagations of the microcracks might be hindered in triaxial tests. This study provides evidence of the subcritical propagation and blunting of the micro cracks in creep test. The results also provide better understanding of the creep shale behavior under uniaxial compression. It may help researchers know more about the creep behavior of well borehole and the crack closure of shale. © 2020 ArMA, American rock Mechanics Association

关键词： Creep

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Novel fava bean 11S nanofiber gels for sustained ergothioneine delivery: a calcium ion and κ-carrageenan approach

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Food Hydrocolloids 2025年 169卷

作者： Hui Chen Mengyuan Zhou Zhihao Xu Xiting dong Xiaoqi ding Xuxia Zhou Pengbo Cui College of Food Science and Technology Zhejiang University of Technology Hangzhou 310014 China Key Laboratory of Green Low-carbon and Efficient Development of Marine Fishery Resources National R&D Branch Center for Pelagic Aquatic Products Processing (Hangzhou) College of Food Science and Technology Zhejiang University of Technology Hangzhou 310014 China National R&D Branch Center for Pelagic Aquatic Products Processing (Hangzhou) Hangzhou 310014 China

This study explores the development of a novel delivery system for the potent antioxidant ergothioneine (ET) using fava bean globulin nanofibers (FPF). FPF were generated from a 6 % fava bean 11S solution under controlled acid-heat treatment (pH 2.0, 85 °C). Increasing treatment duration triggered FPF formation through hydrolysis of the protein into peptides, which subsequently self-assembled. This process significantly altered particle size, secondary structure, viscosity, surface hydrophobicity, and free sulfhydryl group content. Notably, a 24-h reaction yielded FPF with optimal viscosity properties. The FPF-based delivery system was constructed by combining FPF, calcium ions (Ca 2+ ), and κ-carrageenan (KC) to form a gel matrix loaded with ET. Analyses using advanced techniques like Fourier Transform Infrared Spectroscopy (FTIr), X-ray diffraction (Xrd), and Scanning Electron Microscopy (SEM) revealed the formation mechanism. Calcium bridges facilitated gel formation through electrostatic interactions between Ca 2+ and FPF. Furthermore, the addition of KC promoted cross-linking: sulfate ions from KC coordinated with Ca 2+ , and electrostatic interactions occurred between FPF and KC. Following simulated gastrointestinal digestion, the FPF-Ca 2+ -KC-ET composite gel retained its fibrous structure, enabling the sustained release of ET. This controlled release effect was superior to a similar gel formulation lacking the FPF component (FP-Ca 2+ -KC-ET). In conclusion, this research not only advances our understanding of protein nanofiber formation but also offers a promising approach for designing carriers for bioactive substances.

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research of drilling and completion technologies for heavy oil in Venezuela and offshore presalt hydrocarbons in Brazil

Research of drilling and completion technologies for heavy o...

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SPE Middle East Oil and Gas Show and Conference 2019, MEOS 2019

作者： Fang, Zhimeng Wang, Xi Fu, Jin Zhang, Shunyuan Chen, Chen Research Institute of Petroleum Exploration & Development CNPC Engineering Technology R&D Company Ltd. China CNPC Engineering Technology R&D Company Ltd China

ISBN: (纸本)9781613996393

Located in south of Eastern Venezuela Basin, Orinoco Oilfield is an onshore heavy oil field in South America. The heavy oil is known for its high content of acids, heavy metals and asphaltenes with a viscosity of 1000-10000mPa·s. According to the reserve report released by PdVSA by the end of 2016, JUNIN Block that is situated in east of Orinoco Oilfield has an OOIP of 178*108bbl. data of drilled wells and distances between offset horizontal intervals in Orinoco were both studied to improve ultimate production rates. 3-dimension borehole trajectories were designed and the most effective anti-collision measures were taken. After optimziation 8-12 horizontal wells are distributed on one pad. As the horizontal interval extends, the stable production time is prolonged and the accumulative production per well improves. However, the recovery rate stops increasing when the horizontal interval is over 1600m in JUNIN Block. Economically a large space between offset horizontal intervals results in fewer wells and lower costs, but a smaller space contributes to a higher production efficiency per well. If the space exceeds 600m, the accumulative production rate increases much more slightly. A three-dimension well trajectory consists of a vertical interval, an angle building interval, an angle holding interval, an angle building & direction changing interval, a direction turning interval as well as an absolute horizontal interval. Since Petrobras developed the first ever offshore deep reservoir (Lula) by scale in 2006, Brazil has been conducting a progressive campaign targeting hydrocarbons buried under deep water, which contributes to discovery of Lula, Carioca, Jupiter, Buzios, Libra and other giant presalt reservoirs in Santos Basin after Campos Basin, where there are 9 oil fields ranking among the top 20 offshore oil fields in terms of OOIP. By June 2017 over 160×104bbl oil and gas were produced per day in deep water of Santos Basin, taking up 57.1% of the total yield of Cam

关键词： Lime

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Stochastic EUV resist Model

Stochastic EUV Resist Model

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Electronics design Automation (ISEdA), International Symposium of

作者： Guangjian He Jing Xue Taian Fan Yayi Wei Computational Lithography R&D Center Guangdong Greater Bay Area Institute of Integrated Circuit and System Guangzhou China Achievement Transformation Department Institute of Microelectronics Chinese Academy of Sciences Beijing China School of Integrated Circuits Electrical and Communication Engineering University of Chinese Academy of Sciences Beijing China Advanced Semiconductor Technology Development Department Institute of Microelectronics Chinese Academy of Sciences Beijing China

The stochastic effects in photoresist patterning is of great concern in the implementation of EUV lithography. The stochastic nature of EUV chemically amplified resist requires new modeling approaches rather than the continuous model used in dUV. In this paper, a stochastic model based on Gillespie algorithm is introduced, which subdivides the resist volume into many rectangular small cells and simulates the reaction-diffusion behavior of molecules in a cell volume according to carefully calculated probability. In addition, we further explore the influence of the cell size on the stochastic model. There is an optimal cell size in consideration of precision and running time. When cell size is sufficiently large, the results will approximate to the continuous model.

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development of two-stage calibration technique for mems/fog inertial navigation system

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Journal of Institute of Control, robotics and Systems 2021年第6期27卷 450-458页

作者： Yu, Haesung Seo, Yeong-Bin Lee, Inseop Oh, Juhyun Yi, Hyeongsub Kim, Cheonjoong Lee, Sang Jeong The 3rd R&D Institute-3rd Directorate Agency for Defense Development Korea Republic of Weapon System Engineering University of Science and Technology Department of Electronics Engineering Chungnam National University Korea Republic of

This paper presents a two-stage calibration method for a MEMS/FOG inertial navigation system (INS). In general, low-grade MEMS accelerometers cannot realize indirect calibration due to the occurrence of large errors. The indirect calibration method calculates the inertial sensor error as a linear combination of the velocity errors by changing the posture according to the rotation sequence based on the rate table and by repeating the alignment and navigation processes. However, if the inertial sensor error is extremely large, a nonlinear velocity error is additionally generated, and thus, the inertial sensor error cannot be accurately calculated. In this study, we developed a two-level calibration method. In the first stage, the large error of the inertial sensor was calculated and compensated via a direct calibration method. In the second stage, indirect calibration was performed by repeating the alignment and navigation processes by using the accelerometer and gyro calibrated in the first stage. The performance of the inertial navigation system could be enhanced by applying an indirect calibration technique suitable to the operating environment. The experimental results demonstrated that the proposed method could reduce the navigation error. © ICrOS 2021.

关键词： Inertial navigation systems

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development of eco friendly hybrid nanocomposites with improved antibacterial and mechanical properties through NaOH treated natural fibers

Results in Engineering

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results in Engineering 2025年 26卷

作者： Lakshmaiya, Natrayan Karthick, M. Bhaskar, Kiran Chukka, Naga dheeraj Kumar reddy ross, Nimel Sworna Maranan, ramya Department of Mechanical Engineering Saveetha School of Engineering SIMATS Tamil Nadu Chennai602105 India Department of Mechanical Engineering Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology Tamil Nadu Chennai600062 India School of Engineering NICMAR University Maharashtra Pune411045 India Department of Civil Engineering Aditya University Surampalem India Faculty of Mechanical Engineering Opole University of Technology Opole45-271 Poland Division of Research and Development Lovely Professional University Jalandhar - Delhi G.T.Road Punjab Phagwara144411 India Department of Mechanical Engineering Graphic Era Deemed to be University Uttarakhand Dehradun India

Nanoparticles have emerged as effective enhancers of polymer composite properties, particularly in improving mechanical strength and antibacterial resistance. However, challenges remain in optimizing natural fiber–matrix interfacial bonding and filler dispersion, which affect the overall performance of hybrid composites. This study addresses the research gap by combining NaOH-treated coir and hemp fibers with SiO₂ and Al₂O₃ nanofillers to develop eco-friendly hybrid nanocomposites with superior mechanical and antibacterial properties. Natural fibers were alkali-treated with 5 wt. % NaOH for 4 h to enhance fiber–matrix adhesion, while nanoparticles were incorporated at varying loadings (0 to 10 wt. %) into the epoxy matrix. The composites were fabricated using compression molding. Mechanical characterization included flexural testing (ASTM d790) and hardness testing (ASTM E10), while antibacterial activity was evaluated using the well diffusion method against Staphylococcus aureus, Streptococcus mutans, Escherichia coli, and Klebsiella pneumoniae. The results demonstrated that 7.5 wt. % nanofiller addition yielded maximum performance, with a 240 % increase in flexural modulus and up to 41 % improvement in hardness for NaOH-treated fiber composites. Compared to untreated fibers, alkali-treated fibers showed a 16 % improvement in mechanical properties. Antibacterial testing revealed inhibition zones as high as 18 mm, confirming strong effectiveness against gram-positive and gram-negative bacteria. This study establishes a novel approach to hybrid nanocomposite design by integrating fiber surface treatment and dual nanofiller reinforcement, supporting the development of sustainable materials for protective, structural, and biomedical surface applications. © 2025

关键词： Hemp fibers

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Adhesion strength of coated hard systems: a comparative study involving the use of different substrates-PcBN and WC-Co hardmetal

Adhesion strength of coated hard systems: a comparative stud...

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2021 European Powder Metallurgy Congress and Exhibition, Euro PM 2021

作者： Gordon, S. roa, J.J. rodriguez-Suarez, T. M’Saoubi, r. Jiménez-Piqué, E. Franca, L.F.P. Llanes, L. CIEFMA Department of Materials Science and Engineering EEBE Universitat Politècnica de Catalunya BarcelonaTech Campus Diagonal Besòs Barcelona08019 Spain Ltd Global Innovation Centre Fermi Avenue Harwell Oxford Didcot OxfordshireOX11 0QR United Kingdom R&D Material and Technology Development Seco Tools AB Fagersta73782 Sweden

ISBN: (纸本)9781899072545

Coated PcBN tools are increasingly used for industrial applications with stringent requirements. However, detailed information on the adhesion behaviour of these systems, taking into consideration coating, substrate and interface issues, is quite limited. Within this context, the adhesion strength of a coated polycrystalline cubic boron nitride (PcBN) grade is investigated in this work. For comparison purposes, the study is also conducted on another similar system, but using WC-Co hardmetal as substrate. The research is done by means of indentation tests, where emergence and extension of delamination are defined as critical parameters under consideration. Indentation tests were conducted using a conical diamond tip and applying loads ranging from 98 to 980 N. The mechanical study is done paying special attention to document load levels where delamination emerges and complemented by SEM images for inspection of fracture micromechanisms. Experimental results indicate that coated PcBN exhibits a higher critical load for initial delamination than coated hardmetal. However, further evolution of this phenomenon in the former is more abrupt than in the latter. These findings as well as involved micromechanisms are discussed on the basis of relatively different properties between the two substrates studied. © European Powder Metallurgy Association (EPMA)

关键词： Coatings

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