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International Conference on Control, Automation and Systems ( ICCAS)

作者： dayeon Yang Chanyoung Ju Automotive Materials & Components R&D Group Korea Institute of Industrial Technology Gwangju Republic of Korea

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A study on porosity investigation of compacted bentonite in various densities by using micro-computed tomography images analysis

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Kerntechnik 2024年第3期89卷 327-339页

作者： Yang, Wudi Chen, Jui-Chi Li, Jing-Xing Yang, Song Shi, Yunfeng Chen, Chien-Jung Lu, Hui-Min Lu, Chien-Ping Tsai, Fang-Chang Lee, Chuan-Pin 12466 Xiamen University Xiamen361005 China Radioactive Waste Disposal Technology R&D Center 34881 National Tsing Hua Universi Hsinchu City Taiwan Department of Applied Chemistry National Chi Nan University Nantuo Taiwan School of Nuclear Sciences and Engineering 12394 East China University of Technology Nanchang330013 China Taiyuan030006 China Fundamental Science on Radioactive Geology and Technology Exploration Laboratory 12394 East China University of Technology Nanchang330013 China Department of Nuclear Medicine National Taiwan University Hospital College of Medicine National Taiwan University Taipei Taiwan Hubei Key Laboratory of Polymer Materials Key Laboratory for the Green Preparation and Application of Functional Materials Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials School of Materials Science and Engineering 12563 Hubei University Wuhan430062 China

Compacting a material means applying pressure so that the material itself loses its internal pores. It improves the homogeneity of the material itself and increases its density. The pore structure of compacted clay is also an important factor that affects its mechanical properties, permeability and water absorption. In this study, MX-80 bentonite clay was first compacted into round cakes of different densities and then subjected to tomography image analysis technique using micro-computed tomography (micro-CT) at millimeter scale of accuracy for 1.0-2.0g/cm3 compacted clay (thickness of 0.3cm bentonite compacted clay). In this paper, we use the latest commercial specifically for scientific visualization, materials science, non-destructive testing, numerical simulation of chromatographic imaging and other functions of a powerful visualization of the image analyzing method. © 2024 Walter de Gruyter GmbH, Berlin/Boston.

关键词： Bentonite

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Analysis of Compression deformation at High-Temperatures and FEM Simulation for BaTiO3 Sintered Compacts

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Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy 2024年第9期71卷 427-438页

作者： Tanaka, Hiroyuki Matsubara, Hideaki Yokota, Hideaki Iguchi, Toshihiro Takagi, Yuko Nomura, Hiroshi Terasaka, Sota Igimi, daisuke Technology HQ TDK Corporation 2-15-7 Higashi-Ohwada Ichikawa272-8588 Japan Graduate School of Environmental Studies Tohoku University 6-6-20 Aramaki Aza Aoba-ku Sendai980-8579 Japan Prior Art Development Dept. Ceramic Capacitors Business Group TDK Corporation 570-2 Matsugashita Minamihatori Narita282-8558 Japan Materials R&D Lab Japan Fine Ceramics Center 2-4-1 Mutsuno Atsuta-ku Nagoya456-8587 Japan

In shis study, yield stress equation, flow rules and physical properties of barium titanate (BaTiO3) are experimentally obtained. These basic equations and coefficient of flow stress are introduced to finite element method and sintering behavior of barium titanate bulk is simulated. From the uni-axis compression test, yield stress equation of BaTiO3 is expressed by Shima’s equation and flow rule is written by plastic equiation. The coefficient of flow stress of BaTiO3 is significantly smaller than literature Alumina and the value is different when the grain size is different. The experimental sintering deformation is quantitatively reproduced by numerical simulation, where basic equation and physical properties are exprerimentally introduced. In addition, the coefficient of flow stress could be determined by simulation sensitivily analysis. Through this study, experimentally obtained yield stress equation, flow rules and coefficient of flow stress are numerically validated. © 2024 Japan Society of Powder and Powder Metallurgy.

关键词： Yield stress

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removing Water Blocking damage in HTHP Tight Gas reservoir Using Alternative Fracturing Fluid

Removing Water Blocking Damage in HTHP Tight Gas Reservoir U...

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2022 SPE Conference at Oman Petroleum and Energy Show, OPES 2022

作者： Liu, Huifeng Zhang, Jianli Liu, Jiangyu Yang, Zhanwei Chen, Tie Gu, Yixin Baletabieke, Bahedaer CNPC Engineering Technology R&D Company Limited China National Oil & Gas Exploration & Development Company China PetroChina Tarim Oilfield Company China Research Institute of Petroleum Exploration and Development PetroChina China

ISBN: (纸本)9781613997062

Tight gas reservoir is easily damaged by liquid phase because of the small pores and throats in the formation. Hydraulic fracturing is usually used in this kind of reservoir to improve well productivity;however, sometimes the productivity declines instead of increasing after treatments because of the damage of the water-based stimulation fluids. This paper introduces a production decline case in the HTHP tight gas reservoir in Tarim Basin, Western China, and provides a new solution. dixi gas reservoir belongs to the formation of Jurassic Ahe Group, with burial depth of about 5000m. The formation porosity is between 3.0-7.0%, and the permeability is less than 0.1md. The average dST production rates of three wells in this area were more than 30×104 m3/d. However, the production declined by 40% after completion. Acidizing and proppant fracturing were both conducted to regain their productivities;however, the production rates were reduced even further after the treatments. One of these wells’ daily production rate declined by 78% compared to dST production after use of acid fracturing and hydraulic fracturing. A series of core flow tests were carried out to find out the causes and solutions. The results showed that the retention of fracturing fluid in the formation caused "water blocking damage", which leaded to a significant increase of water saturation and rapid decline of gas phase permeability. This is considered the main cause of well productivity decline. Therefore, minimizing the capillary force in the formation is considered the main approach to remove the damage. Three series of alternative fracturing fluids were developed and evaluated. The first one is fracturing fluid with methanol. 5%-20% methanol was added to the fracturing fluid to relieve water blocking damage. The results showed that most of the wells fractured by methanol fracturing fluid gained good post-fracturing productivity. Fluorocarbon surfactant fracturing fluid was also developed, in which the

关键词： Fracturing fluids

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3d printed Ultra-High Performance Concrete: Preparation, Application, and Challenges 1

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Nanotechnology in construction, including deep advances in cement chemistry, nanotechnology, artificial intelligence, robotics, concrete technology, and extreme engineering (blast, impact and fire)

作者： Bai, G. Chen, G. Li, r. Wang, L. Ma, G. School of Civil and Transportation Engineering Hebei University of Technology Tianjin China Zhong Dian Jian Ji Jiao Expressway Investment Development Co. Ltd. Shijiazhuang China Yaobai Special Cement Technology R&D Co. Ltd. Xian China

ISBN: (数字)9789819933303

ISBN: (纸本)9789819933297

3d printed ultra-high performance concrete (3dP-UHPC) plays an important role in the realization of ultra-high compressive and tensile strengths. Considering the particular characteristics of UHPC, the conversion of UHPC to 3dP-UHPC is a complex phenomenon and has been the subject of numerous studies. It is very important to be able to design a thixotropic structure in the early hydration stage for bridging the gap between the slow setting of UHPC and the rapid setting of the 3d printing procedure. In the design and application of 3dP-UHPC, requirements such as the ratio of coagulant and flocculant, fiber alignment, reinforced 3d printed no-rebar reinforced concrete, safety, cost etc. need to be taken into account. We present a comprehensive review of 3dP-UHPC in concrete construction from preparation to application, including design method, raw materials, mechanical, reinforced methods, and applications. Finally, recommendations are provided to promote the application of 3dP-UHPC in engineering practice. © 2023, The Author(s).

关键词： 3d printing

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Optimal modelling of Colding parameters for round inserts with respect to tool use-time criteria 20

Optimal modelling of Colding parameters for round inserts wi...

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20th CIrP Conference on Modeling of Machining Operations in Mons, CIrP CMMO 2025

作者： Bello Bermejo, Juan Manuel Saatçi, Berk Johansson, daniel Hägglund, Sören Ståhl, Jan-Eric Windmark, Christina Division of Production and Materials Engineering Lund University LTH Ole Römers Väg 1 Lund221 00 Sweden R&D Seco Tools AB Björnbacksvägen 10 Fagersta737 47 Sweden Production Technology University West Gustava Melins Gata 2 Trollhättan461 86 Sweden

Optimization of machining processes, such as milling, is essential for industrial efficiency and product quality. To achieve greater efficiency, it is necessary to understand how tools wear down in different conditions in order to anticipate possible undesirable events like sudden breakage or unpredictable degradation. This study focuses on understanding tool wear in dry milling of compacted graphite iron (CGI) EN-GJV-450 using PVd-coated cemented carbide and cBN tools to predict tool life effectively. The research builds on the Colding model, an empirical framework for tool life estimation, by incorporating and comparing two chip thickness concepts in order to optimize the Colding model's performance, maximum chip thickness (hmax) and equivalent chip thickness (he). Through systematic experimentation and modelling, this work has identified optimal conditions for tool life prediction, with hmax offering a potentially resource-efficient cross-validation alternative aligned with sustainability goals. The results demonstrate that the optimized Colding model effectively predicts tool life for both coated cemented carbide and cBN cutting tools with round geometry in dry milling of CGI. The insights gained further enhance our understanding of the milling process and provide a solid foundation for selecting appropriate machining parameters to extend tool life and improve process efficiency. © 2025 The Author(s).

关键词： Milling (machining)

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Casting poly(urethane-imide) elastomers with improved thermoviscoelasticity

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Journal of Applied Polymer Science 2024年第8期141卷

作者： Lin, Chih-Lung Lou, Yi-Jyun Cheng, Yen-Yu rwei, Syang-Peng Institute of Organic and Polymeric Materials National Taipei University of Technology Taipei City Taiwan R&D Department The KUROKI Company Limited New Taipei City Taiwan

Polyurethane (PU) is a versatile material that can be customized to meet specific commercial requirements in different industries because of its favorable mechanical properties. However, it is not resistant to high temperatures, and it requires structural modifications before it can be used in high-temperature structural materials. In this study, isocyanates and anhydrides are copolymerized at high temperatures to obtain a solvent-free oligomer, thus eliminating the risks associated with highly polar aprotic solvents. A casting technique is used to synthesize a solid poly(urethane-imide) (PUI) elastomer. According to the results, casting PUI (CPUI) exhibits optimal physical properties at a hard segment content of 30.5%. Incorporating an ether, symmetric, or imide structure into CPUI may reduce its hysteresis and improve its thermal creep performance. Compared with PU, CPUI exhibits considerably higher creep aging resistance. In dynamic load application tests, CPUI wheels take a substantially longer time to reach failure compared with PU wheels. Overall, CPUI is an environmentally friendly material with high elasticity, low creep, and high heat aging resistance and is suitable for static and dynamic manufacturing applications. © 2023 Wiley Periodicals LLC.

关键词： Creep

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Experimental study of the influencing factors and mechanisms of the pressure-reduction and augmented injection effect by nanoparticles in ultra-low permeability reservoirs

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Petroleum Science 2024年第3期21卷 1915-1927页

作者： Pan Wang Yu-Hang Hu Liao-Yuan Zhang Yong Meng Zhen-Fu Ma Tian-ru Wang Zi-Lin Zhang Ji-Chao Fang Xiao-Qiang Liu Qing You Yan Zhang Beijing Key Laboratory of Unconventional Natural Gas Geological Evaluation and Development Engineering China University of Geosciences(Beijing)Beijing100083China School of Energy Resources China University of Geosciences(Beijing)Beijing100083China Petroleum Engineering Technology Research Institute Sinopec Shengli Oilfield CompanyDongying257000ShandongChina Hekou Oil Production Plant Sinopec Shengli Oilfield CompanyDongying257200ShandongChina Petroleum Exploration and Production Research Institute SINOPECBeijing102206China CNPC Engineering Technology R&D Company Limited Beijing102206China

Nanoparticles(NPs)have gained significant attention as a functional material due to their ability to effectively enhance pressure reduction in injection processes in ultra-low permeability *** are typically studied in controlled laboratory conditions,and their behavior in real-world,complex environments such as ultra-low permeability reservoirs,is not well understood due to the limited scope of their *** study investigates the efficacy and underlying mechanisms of NPs in decreasing injection pressure under various injection conditions(25—85℃,10—25 MPa).The results reveal that under optimal injection conditions,NPs effectively reduce injection pressure by a maximum of 22.77%in core *** pressure reduction rate is found to be positively correlated with oil saturation and permeability,and negatively correlated with temperature and ***,particle image velocimetry(PIV)experiments(25℃,atmospheric pressure)indicate that the pressure reduction is achieved by NPs through the reduction of wall shear resistance and wettability *** work has important implications for the design of water injection strategies in ultra-low permeability reservoirs.

关键词： Nanoparticle Pressure reduction Augmented injection Ultra-low permeability reservoir

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Novel and durable composite phase change thermal energy storage materials with controllable melting temperature

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Journal of materials Science & technology 2021年第27期86卷 11-19页

作者： Haiting Wei Shuiyuan Yang Cuiping Wang Changrui Qiu Kairui Lin Jiajia Han Yong Lu Xingjun Liu College of Materials and Fujian Provincial Key Laboratory of Materials Genome Xiamen UniversityXiamen 361005China State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyShenzhen 518055China Institute of Materials Genome and Big Data Harbin Institute of TechnologyShenzhen 518055China Shenzhen R&D Center for Al-based Hydrogen Hydrolysis Materials Shenzhen 518055China

The development of high temperature phase change materials(PCMs)with great comprehensive performance is significant in the future thermal energy storage *** this study,novel and durable Al-Si/Al_(2)O_(3)-Al N composite PCMs with controllable melting temperature were successfully synthesized by using pristine Al powder as raw material and tetraethyl orthosilicate as SiO_(2)*** Al_(2)O_(3)shell and Al-Si alloy were in-situ produced via the substitution reaction between molten Al and SiO_(2).Importantly,the crack caused by the incomplete encapsulation of the Al_(2)O_(3)shell could repair itself by the nitridation reaction of internal molten Al and thereby forming a highly dense Al_(2)O_(3)-Al N composite *** produced dense Al_(2)O_(3)-Al N composite shell could significantly improve the thermal cycling stability of composite PCMs,and thus,the thermal storage density decrease of the Al-Si/Al_(2)O_(3)-Al N(59.8 J/g to77.7 J/g)was far less than that of the Al-Si/Al_(2)O_(3)(118.5 J/g)after 3000 thermal ***,the synthesized Al-Si/Al_(2)O_(3)-Al N still exhibited a controllable melting temperature(571.5-637.9℃),relatively high thermal storage density(105.6-150.7 J/g),great dimensional stability and structural stability after3000 thermal ***,the synthesized Al-Si/Al_(2)O_(3)-Al N composite PCMs,as promising preferential thermal energy storage materials,can be stably used in the energy utilization efficiency improvement of various systems for more than 6 years.

关键词： Al-Si Al_(2)O_(3)-AlN durable Controllable melting temperature Phase change thermal storage material

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Exosomes: Emerging implementation of nanotechnology for detecting and managing novel corona virus-SArS-CoV-2

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Asian Journal of Pharmaceutical Sciences 2022年第1期17卷 20-34页

作者： Akhilesh dubey Cynthia Lizzie Lobo ravi GS Amitha Shetty Srinivas Hebbar Sally AEl-Zahaby Department of Pharmaceutics NGSM Institute of Pharmaceutical SciencesNitte(Deemed to be University)Mangaluru 575018India Formulation and Development Viatris R&D CentreBengaluru 560105India Department of Pharmaceutics and Pharmaceutical Technology Faculty of PharmacyPharos University in AlexandriaAlexandria 21311Egypt

The spread of SArS-CoV-2 as an emerging novel coronavirus disease (COVId-19) had progressed as a worldwide pandemic since the end of 2019. COVId-19 affects firstly lungs tissues which are known for their very slow regeneration. Afterwards, enormous cytokine stimulation occurs in the infected cells immediately after a lung infection which necessitates good management to save patients. Exosomes are extracellular vesicles of nanometric size released by reticulocytes on maturation and are known to mediate intercellular communications. The exosomal cargo serves as biomarkers in diagnosing various diseases;moreover, exosomes could be employed as nanocarriers in drug delivery systems. Exosomes look promising to combat the current pandemic since they contribute to the immune response against several viral pathogens. Many studies have proved the potential of using exosomes either as viral elements or host systems that acquire immune-stimulatory effects and could be used as a vaccine or drug delivery tool. It is essential to stop viral replication, prevent and reverse the massive storm of cytokine that worsens the infected patients’ situations for the management of COVId-19. The main benefits of exosomes could be;no cells will be introduced, no chance of mutation, lack of immunogenicity and the damaged genetic material that could negatively affect the recipient is avoided. Additionally, it was found that exosomes are static with no ability for in vivo reproduction. The current review article discusses the possibilities of using exosomes for detecting novel coronavirus and summarizes state of the art concerning the clinical trials initiated for examining the use of COVId-19 specific T cells derived exosomes and mesenchymal stem cells derived exosomes in managing COVId-19.

关键词： Exosomes COVId-19 Specific T cell-derived exosomes Mesenchymal stem cells-derived exosomes Nanotechnology SArS-Co V-2

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