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2023 Conference on Lasers and Electro-Optics, CLEO 2023

作者： Park, Tae Hoon Lee, Hyo Soo Lee, Hai Joong Kim, Jee Seong Hong, Won Pyo Hwang, Taek Yong Industrial Materials Processing R&D Department Korea Institute of Industrial Technology Incheon21999 Korea Republic of Department ofMaterials Science and Engineering Inha University Incheon22212 Korea Republic of R&DDepartment DAEHANOKSTEEL Gwangju12764 Korea Republic of Molding and Metal Forming R&D Department Korea Institute of Industrial Technology Bucheon14441 Korea Republic of

Through femtosecond laser irradiation, we observed the formation of columnar structures above the surface level of Al and showed the control of their morphological profiles with the laser fluence and the number of irr...

ISBN: (纸本)9781957171258

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A Study on the damage Behavior of Hybrid 60 and 52100 Steel during rolling Contact Fatigue 1

A Study on the Damage Behavior of Hybrid 60 and 52100 Steel ...

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1st ASTM Bearing and Transmission Steels technology Symposium

作者： Loaiza, Tania Ooi, Steve Babu, revathy rajan Prasath Ölund, Patrik Hedström, Peter Dept. of Materials Science and Engineering KTH Royal Institute of Technology StockholmSE 100 44 Sweden Ovako Corporate R&D Building 202 HoforsSE 813 82 Sweden Ovako Corporate R&D Maxwell Centre University of Cambridge JJ Thomson Ave. CambridgeCB3 0HE United Kingdom

ISBN: (纸本)9780803177451

This study investigates and compares the evolution of subsurface hardness and microstructure of Hybrid 60 and 52100 steels under rolling contact fatigue (rCF) testing. Similar microstructural decay was identified for both Hybrid 60 and 52100 steel, evidenced by the formation of elongated ferrite and ferrite microbands during the first stage of the microstructural decay. Nano-sized ferrite grains were also observed in the region with maximum Hertzian stress after 1×108 stress cycles for both steels. In addition to the common microstructural decay in the two steels, the 52100 steel experienced microstructural decay in the form of dissolution of residual cementite and tempered carbides. The present study shows that the Hybrid 60 steel develops less microstructural decay than the 52100 steel at the same rCF conditions suggesting that Hybrid 60 could be suitable for replacing 52100 in applications where higher rCF is needed. The improved microstructure stability in Hybrid 60 is attributed to the more stable secondary carbides and intermetallic precipitates as compared to the cementite in the 52100 steel. Copyright © 2024 by ASTM International, 100 Barr Harbor drive, PO Box C700, West Conshohocken, PA 19428-2959.

关键词： Ferrite

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WhaleOptNB: A Method for Automated Biomedical Text document Classification 7th

WhaleOptNB: A Method for Automated Biomedical Text Document ...

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7th International Conference on Intelligent Computing and Optimization, ICO 2023

作者： Kumar, S. Vishnu Chohan, Jasgurpreet Singh Kalita, Kanak Department of Electronics and Communication Engineering Vel Tech Rangarajan Dr Sagunthala R&D Institute of Science and Technology Avadi600062 India Department of Mechanical Engineering and University Centre for Research & Development Chandigarh University Mohali140413 India Department of Mechanical Engineering Vel Tech Rangarajan Dr Sagunthala R&D Institute of Science and Technology Avadi600062 India Jadara University Research Center Jadara University Irbid Jordan

ISBN: (纸本)9783031733239

In recent years, there has been a meteoric rise in the amount of digital information stored in the biomedical industry due to the rapid growth of the internet and other information technologies. Automated biomedical text classification has become an effective and robust method of accessing the increased amount of technical and medical literature in the biomedical sector through the classification of multiple source documents while preserving the significantly informative data to manage the enormous amount of biomedical data currently available. This is accomplished by automating the classification of multiple source documents in the biomedical field. Therefore, multi-document biomedical text classification plays an essential role in resolving the problem of gaining access to accurate and up-to-date information. A Whale Optimization Algorithm-based Weighted Naive Bayes Classifier (WhaleOptNB) for text document classification is proposed. A biomedical text document dataset is collected and preprocessed. Then, the preprocessed data's features are extracted using the Term Frequency-Inverse document Frequency (TF-IdF). To classify the biomedical text document, WhaleOptNB is utilized. To prove the efficiency of the proposed methodology, it is compared with existing methods. Simulation results show that the proposed method outperforms conventional methods. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

关键词： Inverse problems

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The Successful Application of Expansion Tube technology in the Bongor Basin of Chad 13th

The Successful Application of Expansion Tube Technology in t...

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13th International Field Exploration and development Conference, IFEdC 2023

作者： Zhong, Zhao Li, Xiao-Gang Liu, Ji-Tong Ji, Fei Li, Gang-Lu Jia, Tao Liu, Chen-Chao Zhang, Guo-Bin Liu, Shan-Shan CNPC Engineering Technology R&D Company Limited Beijing102206 China China National Oil and Gas Exploration and Development Corporation Beijing100034 China CNPC Bohai Drilling Engineering Company Limited Tianjin300452 China

ISBN: (纸本)9789819702558

The Bongor is the main basin for increasing storage and production in the CNPC Chad. With the continuous deepening of development, underground safety operations face the following problems: the inability to effectively seal the gas layer in the overlying strata of the basement, the high risk of secondary completion of the basement gas injection well, and the poor stability of the wellbore in the M group shale formation. In response to the bottleneck problems faced by underground operations, geological, drilling, logging, and other data were analyzed and sorted. Based on the expansion tube technology, the safety sealing technology for high-pressure gas cap in basement, secondary completion technology for basement gas injection wells, and openhole sealing technology for expansion tubes were optimized and formed. They were successfully applied for the first time in the Bongor Basin, achieving a daily gas injection volume of 2000 Nm3, shortening the construction cycle, improving wellbore quality, and reducing complex underground risks, Subsequently, it will be widely promoted and applied as a mature technology, supporting the efficient development of the Bongor Basin. At the same time, the expansion tube technology has a demonstration effect on the development of similar oil fields due to its good practical functions and application value [1–6]. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Gases

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Effect of Alternating Load on Sand Production of Gas Storage 12th

Effect of Alternating Load on Sand Production of Gas Storage

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12th International Field Exploration and development Conference, IFEdC 2022

作者： Zhang, Yu-da Yuan, Guang-Jie dong, Jing-Nan Xia, Yan Ban, Fan-Sheng Zang, Chun-Yang Research Institute of Petroleum Exploration and Development Beijing China CNPC Engineering Technology R&D Company Limited Beijing China College of Petroleum Engineering Liaoning Petrochemical University Liaoning China

ISBN: (纸本)9789819919635

Energy types are constantly changing due to the change of demand, and natural gas as a clean energy is gradually accepted by the world at present. In order to ensure the stable supply of natural gas, long-term, safe and effective means of peak regulation have emerged, and gas storage has developed rapidly in recent years. The injection and production condition of gas storage changes with the demand of gas peak adjustment. The formation pressure increases and the matrix stress decreases during gas injection. The formation pressure decreases and the matrix stress increases during gas recovery. Compared with production wells, injection and production wells of gas storage are more susceptible to shear stress and tensile stress under the action of alternating loads, so the phenomenon of sand production in gas storage is very common. In this paper, based on the sand production simulation device of gas storage, the influence of alternating load on sand production of gas storage is discussed through indoor experiment. In the experiment, the magnitude and times of applying alternating load are mainly changed to observe the sand production of core. The experimental results show that the core is more likely to produce sand under the action of alternating load, and the amount of sand produced gradually increases with the increase of the number of alternating load. Unconsolidated sandstones also produce sand when the alternating load is lower than the initial sand-producing pressure. The influence of alternating load on sand production of gas storage provides theoretical and experimental basis for sand production prediction and sand control completion method optimization. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2023.

关键词： Sand

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Study On Shear & Tensile Activation Of Hydraulic Fracturing In Natural Fractured reservoirs

Study On Shear & Tensile Activation Of Hydraulic Fracturing ...

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2023 SPE/IATMI Asia Pacific Oil and Gas Conference and Exhibition, APOG 2023

作者： Zhang, Yang Qiao, Yan Zhou, Fujian ren, dengfeng Liu, Yuzhang Bai, Jie China University of Petroleum Beijing China CNPC Engineering Technology R&D Company Limited China PetroChina Tarim Oilfield Company China Research Institute of Petroleum Exploration & Development China

ISBN: (纸本)9781613999813

The most fundamental purpose of reservoir stimulation is to maximize stimulation volume. For reservoirs developed with natural fractures, the maximization of fracture activation (tensile & shear activation) area should be pursued. Many scholars have studied the mechanical conditions of natural fractures activation, and used stress shadow to optimize cluster spacing. However, there is a lack of in-depth research on fracture propagation law, relationship between fracture activation and stress shadow, and factors affecting natural fracture activation. In this paper, numerical simulation methods are used to establish a true three-dimensional hydraulic fracturing model for reservoirs with natural fractures, and the quantitative evaluation indicators of stress shadow area and activation degree of natural fractures are formed. By studying the effects of different natural fracture properties, mechanical and engineering parameters on fracture propagation, stress shadow and natural fracture activation, the main controlling factors affecting fracture propagation and turning, the relationship between fracture activation and stress shadow, and changing rules of fracture activation are clarified. Finally, the fracture turning and accuracy of model are verified by microseismic monitoring data. Studies have shown that large-scale, high-density natural fractures, high net pressure, low in-situ stress difference, and moderate stress-fracture angle (30°~60°) can easily divert the propagation of hydraulic fractures instead of expanding in the horizontal maximum principal stress (Shmax) direction. Fracture tensile activation has a strong positive correlation with stress shadow area, that is, tensile activation leads to the increase of stress shadow area, while fracture shear activation has almost no correlation. Fracture tensile & shear activation area is in a competitive relationship, and shear fractures are dominant when the stressfracture angle is 45-60°, the in-situ stress differenc

关键词： Stresses

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Three-dimensional breast cancer tumor models based on natural hydrogels:a review

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2024年第9期25卷 736-755页

作者： Yan SHU Bing LI Hailin MA Jiaqi LIU Yuen Yee CHENG Xiangqin LI Tianqing LIU Chuwei YANG Xiao MA Kedong SONG State Key Laboratory of Fine Chemicals Dalian R&D Center for Stem Cell and Tissue EngineeringDalian University of TechnologyDalian116024China Institute for Biomedical Materials and Devices Faculty of ScienceUniversity of Technology SydneySydneyNSW2007Australia Emergency Center The Second Hospital of Dalian Medical UniversityDalian116023China Department of Anesthesia The First Affiliated Hospital of Dalian Medical UniversityDalian116011China

Breast cancer is the most common cancer in women and one of the deadliest cancers *** to the distribution of tumor tissue,breast cancer can be divided into invasive and non-invasive *** cancer cells in invasive breast cancer pass through the breast and through the immune system or systemic circulation to different parts of the body,forming metastatic breast *** resistance and distant metastasis are the main causes of death from breast *** on breast cancer has attracted extensive attention from *** vitro construction of tumor models by tissue engineering methods is a common tool for studying cancer mechanisms and anticancer drug *** tumor microenvironment consists of cancer cells and various types of stromal cells,including fibroblasts,endothelial cells,mesenchymal cells,and immune cells embedded in the extracellular *** extracellular matrix contains fibrin proteins(such as types Ⅰ,Ⅱ,Ⅲ,Ⅳ,Ⅵ,and Ⅹ collagen and elastin)and glycoproteins(such as proteoglycan,laminin,and fibronectin),which are involved in cell signaling and binding of growth *** current traditional two-dimensional(2d)tumor models are limited by the growth environment and often cannot accurately reproduce the heterogeneity and complexity of tumor tissues in ***,in recent years,research on three-dimensional(3d)tumor models has gradually increased,especially 3d bioprinting models with high precision and *** with a 2d model,the 3d environment can better simulate the complex extracellular matrix components and structures in the tumor ***-dimensional models are often used as a bridge between 2d cellular level experiments and animal *** matrix,gelatin,sodium alginate,and other natural materials are widely used in the construction of tumor models because of their excellent biocompatibility and non-immune ***,we review various natural scaffold materials and con

关键词： Breast cancer Tumor microenvironment 3d tumor model decellularized extracellular matrix Natural scaffold materials

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A deoxidation thermodynamic model for 304 stainless steel considering multiple-components coupled reactions

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Journal of Iron and Steel research International 2024年第1期31卷 74-91页

作者： Yan Yan Guang-hao Shang Li-ping Zhang Shao-ying Li Han-jie Guo School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing100083China Beijing Key Laboratory of Special Melting and Preparation of High-End Metal Materials Beijing100083China Henan Jinhui Stainless Steel Industry Group Co. Ltd.Xuchang461500HenanChina Changge Jinhui Recycling Metal R&D Co. Ltd.Xuchang461500HenanChina

A thermodynamic model for predicting the equilibrium oxygens of 304 stainless steel was developed based on the theory of slag-steel equilibrium,the law of mass conservation,and the ion and molecule coexistence *** the developed model,the Fe-Cr-Mn-Si-Al-S-O-melts reaction system and CaO-MgO-CaF_(2)-FeO-MnO-Al_(2)O_(3)-SiO_(2)-Cr2O_(3)slags were *** oxygen contents calculated by the model are in good agreement with experimental results and reference *** equilibrium oxygen contents in 304 stainless steel mainly decrease with increasing binary basicity(w(CaO)/w(SiO_(2)),where w(i)is the mass percentage of component i)and decreasing *** binary basicity at 2.0 while maintaining temperatures lower than 1823 K will keep the oxygen contents in the 304 stainless steel lower than 15×10^(-6).The equilibrium oxygen contents may also be decreased with increasing content of MgO in slags,which is more significant at lower binary ***,a small amount of FeO,MnO,and Al_(2)O_(3)(about 0-2.5 wt.%)in slags has little effect on equilibrium oxygen ***,it is found that the[C]-[O]reaction may occur during refining process but will not significantly affect the equilibrium oxygen contents.

关键词： Complex deoxidation Thermodynamic model Ion and molecule coexistence theory 304 stainless steel Slag-steel reaction

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Stretchable nanogenerators for scavenging mechanical energy

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Nano research 2023年第9期16卷 11682-11697页

作者： Chong Guo Lan Xu Yuan Su Hongwei Li Mei Zhang Ya Yang CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400China Beijing Key Laboratory of Clothing Materials R&D and Assessment Beijing Engineering Research Center of Textile NanofiberSchool of Materials Design and EngineeringBeijing Institute of Fashion TechnologyBeijing 100029China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China Center on Nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanning 530004China

Using stretchable nanogenerators to obtain disordered mechanical energy from the environment is an ideal way to realize wearable power supply equipment and self-power electronic devices,and alleviate the energy *** is of great significance to integrate the stretchability into the nanogenerator,which can fit the complex shape of the target object better and is well suitable for wearable *** applied to the human body,it can directly harvest human body mechanical energy to power wearable electronic devices and get rid of the trouble of *** paper systematically reviewed nanogenerators in stretchability,focusing on stretchable triboelectric nanogenerators,stretchable piezoelectric nanogenerators,and stretchable hybrid *** physical mechanism,material selection,structure design,and output performance are discussed in *** is concluded that the fabrication methods of various devices can be broadly categorized into the two most important device types,namely fiber-like and planar.A detailed analysis of representative work and the latest progress in the past decade is *** is most important that excellent stretchability and high-power output are the key point to realize application value of stretchable *** addition,we discuss opportunities and challenges,as well as future development direction of stretchable nanogenerators.

关键词： stretchable wearable devices triboelectric nanogenerator piezoelectric effect hybrid nanogenerator

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development and Application of Full Vector Geosteering Comprehensive Analysis Software-OneSteer 11th

Development and Application of Full Vector Geosteering Compr...

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11th International Field Exploration and development Conference, IFEdC 2021

作者： Lin, Wang Wu, dong Liu, Lifeng Zhu, Weixing Xue, Hongzhi CNPC Engineering Technology R&D Company Limited Beijing China PetroChina Research Institute of Petroleum Exploration and Development Beijing China

ISBN: (纸本)9789811921483

Horizontal well technology is a favorable means for the efficient development of "deep, low permeability, offshore, unconventional" and other complex reservoirs, and its key is to improve the drilling rate of the target geological body. Based on the analysis of the business process and requirements of geosteering, aiming at the geological characteristics of China's continental shale, carbonate and glutenite reservoirs, the key technical problems such as geo-steering based stratigraphic structure model modeling, main LWd instrument curve forward modeling, interactive geological model editing, dynamic extraction of stratigraphic parameters, multi-information fusion seismic inversion and so on have been solved, and a full vector geosteering comprehensive analysis software named OneSteer was developed. The software is applied to the field geo-steering analysis of carbonate reservoir in southwest of China and shale reservoirs in Xinjiang oilfields, which improves the drilling encounter rate, reduces the drilling risk, improves the drilling efficiency, and achieves satisfactory results. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Extraction

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