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Microstructure and Mechanical Properties of B-Bearing Austenitic Stainless Steel Fabricated by Laser Metal Deposition In-Situ Alloying

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Acta Metallurgica Sinica(English Letters) 2022年第3期35卷 453-465页

作者： Sheng Huang Xiaoyu Zhang Dichen Li Qingyu Li State Key Laboratory for Manufacturing Systems Engineering Xian Jiaotong UniversityXian 710049China Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of ChinaChengdu 610213China

In the field repair application of laser metal deposition(LMD),the kinds of powder materials that can be used are limited,while the equipment components are made of various *** many components have to be repaired with heterogeneous ***,it is difficult to match the mechanical properties between the repaired layer and the substrate due to the diff erent *** on the high flexibility of raw materials and processes in LMD,an in-situ alloying method is proposed herein for tailoring the mechanical properties of LMDed *** diff erent mixing ratios of Fe314 and 316 L stainless steel powders as the control parameter,the microstructure and mechanical properties of B-bearing austenitic stainless steel fabricated by LMD in-situ alloying with diff erent proportions of Fe314 and 316 L particles were *** the increase in the concentration of 316 L steel,the volume fraction of the eutectic phase in deposited B-bearing austenitic stainless steel reduced,the size of the austenite dendrite increased,the yield strength and ultimate tensile strength decreased monotonically,while the elongation increased ***,the fracture mode changed from quasi-cleavage fracture to ductile *** adding 316 L powder,the yield strength,tensile strength,and elongation of deposited B-bearing austenitic stainless steel could be adjusted within the range of 712 MPa–257 MPa,1325 MPa–509 MPa,and 8.7%–59.3%,***,this work provides a new method and idea for solving the performance matching problem of equipment components in the field repair.

关键词： Additive manufacturing Laser metal deposition In-situ alloying B-bearing austenitic stainless steel Mechanical properties

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Research on compressive fatigue performance of fibre reinforced asphalt concrete based on response surface methodology

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International Journal of Microstructure and Materials Properties 2023年第5期16卷 380-392页

作者： He, Xiaohong Di, Na Liu, Fan Department of Road Bridge and River-Crossing Engineering Changchun University of Science and Technology Changchun130600 China Department of Engineering Cost Changchun University of Science and Technology Changchun130600 China Jilin Province Communication Planning and Design Institute Changchun130600 China

In order to accurately study the compressive fatigue properties of composite concrete, a response surface method is proposed to study the compressive fatigue properties of fibre reinforced asphalt concrete. Firstly, fibre parameters, asphalt parameters and matrix concrete parameters are set to complete the preparation of fibre reinforced asphalt concrete. Secondly, the compressive strength, design response surface experiment, stiffness modulus and cumulative damage amount of the specimen are calculated. Finally, according to the response surface results, the compressive properties of the specimens are determined, and the stiffness modulus attenuation characteristics and cumulative damage changes of the specimens are determined. The results of compressive fatigue test show that the influence of asphalt content on the compressive strength of concrete is greater than that of fibre content, and the test accuracy of compressive performance of this method is higher than that of existing methods, and the accuracy of this method reaches 99%. Copyright © 2023 Inderscience Enterprises Ltd.

关键词： Compressive strength

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A new electricity theft detection method using hybrid adaptive sampling and pipeline machine learning

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Multimedia Tools and Applications 2024年第18期83卷 54521-54544页

作者： Tripathi, Ashish Kumar Pandey, Avinash Chandra Sharma, Nikhil Department of Computer Science and Engineering Malaviya National Institute of Technology Rajasthan Jaipur302017 India Discipline of CSE PDPM Indian Institute of Information Technology Design and Manufacturing Madhya Pradesh Jabalpur482005 India

Electricity theft not only results in higher electricity costs for regular paying customers but is also a safety threat to the public due to illegal power connections made for cheating. Many governments and private companies have suffered substantial losses from electricity theft or fraud. Several approaches have been presented in the literature for electricity fraud detection. The existing methods for electricity fraud detection show poor performance as the electricity datasets are generally unbalanced or skewed. To handle skewness issues, SMOTE and ADASYN-based oversampling techniques are employed in some electricity fraud detection methods. However, existing oversampling methods typically increase the overlapping of classes and introduce additional noise. Therefore, in this paper, a new oversampling method named ADASYN-SGWO has been presented. The proposed ADASYN-SGWO employs ADASYN for oversampling and SSO-GWO for intelligent undersampling, which mitigates class imbalance issues in electricity datasets. After reducing the issue of class imbalance, random forest pipeline has been used to detect electricity fraud. To assess the efficiency of the proposed approach, precision, recall, F1 score, accuracy, Matthews correlation coefficient, and balance classification rate of the proposed and other state-of-the-art, including XG-boost classifier, Logistic regression, Gaussian naive Bayes, Random Forest classifier, Ada Boost classifier, LGBM classifier, and Quadrant discriminative analysis, have been computed and compared. Further, the proposed approach is also statistically validated using Friedman and post hoc analysis. The statistical analysis and experimental outcomes witnessed that the proposed ADASYN-SGWO-PRF method has outperformed all the other considered methods with 98.2% accuracy, which is significant for real-time applications of electricity theft detection problems. © The Author(s), under exclusive licence to Springer science+Business Media, LLC, part of Spr

关键词： Classification (of information)

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Sybil Assault Detection in VANET with Efficient Network Analysis

Sybil Assault Detection in VANET with Efficient Network Anal...

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2024 MIT Art, design and technology School of Computing International Conference, MITADTSoCiCon 2024

作者： Mukherjee Mathur, Shubhra Jadhav, Nagesh Gupta, Ravindra Design and Technology University Pune Sarvepalli Radakrishnan University School of Computing MIT Art Department of Computer Science and Engineering Bhopal India Design and Technology University School of Computing MIT Art Department of Computer Science and Engineering Pune India Sarvepalli Radakrishnan University School of Computing Department of Computer Science and Engineering Bhopal India

ISBN: (纸本)9798350362879

A developing technology that can be highly helpful for both intelligent transportation services and safety and security is the Automobile ad hoc network, or VANET. Nevertheless because of the great mobility and wireless connection of cars, there are numerous security risks that jeopardize people's safety and security when driving. The Sybil assault, in which the perpetrator makes up a false identity to obtain significant influence within the network and delay certain services and manipulate others by fictitious voting, is one of the main security issues. People can avoid being duped by an attacker or falling into traps when attacks are detected early. This study describes two methods for detecting Sybil attacks: the first uses the Poisson Distribution Method in order to forecast traffic on the street, whereas the latter examines network efficiency for packet delivery ratio (PDR) in both benign additionally malicious environments. According to the simulation's findings, PDR lowers the number of fictitious cars in the network. Our method is straightforward and efficient because it doesn't involve a lot of computational overhead and doesn't breach users' privacy concerns. © 2024 IEEE.

关键词： Poisson distribution

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Prioritizing the quality parameters of cotton carded knit yarn by varying tensions of the bottom aprons of the ring frame

Textile and Leather Review

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Textile and Leather Review 2023年 6卷 284-305页

作者： Raian, Shahriar Akter, Sormin Baral, Lal Mohan Department of Textile Engineering Ahsanullah University of Science and Technology Dhaka Bangladesh Department of Fashion Design and Apparel Merchandising Anwar Khan Modern University Dhaka Bangladesh

The forces exerted on fibres during drafting in the drafting zone with the upper and bottom aprons of the Ring Frame significantly impact the yarn quality. Aprons are crucial in manipulating fibres by facilitating movement and directing them toward the primary drafting area. From these two aprons, the bottom apron's tension is changed by changing tension spring bar groove hole positions. There is no scope for changing such settings in the case of top aprons. This research aims to achieve high-quality cotton carded knit yarn by selecting an appropriate bottom apron tension due to the significant role in proper drafting and twist insertion at the time of the manufacturing process directly affecting produced yarn's strength, evenness, imperfections, and hairiness properties. To fulfil this requirement, six yarn samples are produced each time by using 5 different tensions of the bottom drafting aprons. The samples underwent quality parameter testing, including Unevenness (U)%, Coefficient of Variation (CV)%, Imperfection Index (IPI), Hairiness (H), and Count Strength Product (CSP). The findings indicated that increasing the tension of the bottom apron while maintaining positions 1, 2, and 3 reduces the occurrence of neps, variations in thickness and thinness, and imperfections. In contrast, CSP is increased due to elevated stress on the fibres. In general, maintaining an appropriate tension enhanced the quality of the yarn, and the best quality was obtained for position 3, considering all the quality variables. Moreover, by using Interpretive Structural Modelling (ISM) methodology, the pairwise relationship between the quality variables is shown. Finally, after calculation, those quality variables are arranged in three levels. According to this level, the quality parameters are ranked where the top is the highest. It is observed that Count Strength Product is at the highest level, which indicates that CSP should be given more priority. Moreover, the end use of this yarn

关键词： Cotton

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Feature Extraction and Similarity-Based Movie Recommendation Using Bag-of-Words Model

Feature Extraction and Similarity-Based Movie Recommendation...

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International Conference on Smart systems and Wireless Communication, SSWC 2024

作者： Raj, Swati Dutta, Jhalak Bandopadhyay, Saikat Prasad, Rajesh Department of Computer Science and Engineering Christ University Bengaluru India Department of Computer Science and Engineering Heritage Institute of Technology Kolkata India Department of Artificial Intelligence and Machine Learning Netaji Subhash Engineering College Kolkata India Department of Computer Science and Engineering MIT Art Design and Technology University Pune India

ISBN: (纸本)9789819613472

Recommender systems have become pervasive in guiding users through a lot of choices available in today’s digital landscape. This paper presents a content-based recommender system focused specifically for movie recommendations, offering a viable alternative to collaborative filtering methods. Unlike collaborative filtering, which relies on user ratings and demographic data, the proposed system operates without such prerequisites, making it particularly advantageous in scenarios with limited user engagement. By leveraging content attributes such as title, genre, cast, and crew, the system identifies similarities between movies and recommends those akin to a user’s preferences. Through innovative preprocessing techniques and feature extraction methodologies, the system transforms textual descriptions into numerical vectors, enabling efficient recommendation generation. The proposed model contributes to addressing critical challenges inherent in collaborative filtering, including the cold start problem, data sparsity, and popularity bias. Furthermore, it underscores the broad applicability of recommender systems across various domains and emphasizes the continuous evolution of interface designs and algorithms within the research community. Overall, the proposed content-based recommender system offers a promising solution for delivering personalized movie recommendations while advancing the state of the art in recommendation technology. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Bag-of-words Cosine similarity Filtering system Recommender system TF-IDF

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Nanoimprint lithography-assisted block copolymer self-assembly for hyperfine fabrication of magnetic patterns based on L10-FePt nanoparticles

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science China Chemistry 2025年第5期68卷 2027-2034页

作者： Jie Zhang Yi Chen Guijun Li Zelin Sun Zhengong Meng Wai-Yeung Wong Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy The Hong Kong Polytechnic University The Hong Kong Polytechnic University Shenzhen Research Institute Division of Integrative Systems and Design and Department of Electronic and Computer EngineeringThe Hong Kong University of Science and Technology School of Flexible Electronics (Future Technology) and Institute of Advanced Materials (IAM) Nanjing Tech University

L10-FePt-type bit-patterned media has provided a promising alternative for ultrahigh-density magnetic recording systems in the current digital era, but rapid fabrication of magnetic patterns with hyperfine bit islands is still challenging, especially with the target for miniaturization and scalable production simultaneously. Herein, Fe,Pt-containing block copolymers were utilized as single-source precursors for solution-processable patterning and subsequent generation of the demanding magnetic FePt dots by in situ pyrolysis. High-throughput nanoimprint lithography was initially employed to fabricate the predefined bit cells precisely,and then the intrinsic self-assembly of phase-separated block copolymers further drove the formation of accurate bit *** from the synergistic effect of top-down lithographic approach and bottom-up self-assembly, the customizable patterns could be achieved for large-scale mass production in targeted areas, but high-density isolated dots could also be accurately aligned along the patterned features after subsequent self-assembly. This reliable strategy would provide a good avenue to precisely construct ultrahigh-density magnetic data storage devices.

关键词： organometallic precursor magnetic nanoparticles block copolymer self-assembly nanoimprint lithography

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Synergizing Artistry and technology by Unveiling the Integration of Matte Painting Techniques in Crafting Precise and Immersive Visual Effects Backgrounds 4th

Synergizing Artistry and Technology by Unveiling the Integra...

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4th International Conference on Machine Learning, Advances in Computing, Renewable Energy and Communication, MARC 2023

作者： Raturi, Vinod Yadav, Rakesh Kumar Department of Computer Science and Engineering Maharishi School of Engineering and Technology Maharishi University of Information Technology Lucknow India Department of Animation and Game Design Amity School of Engineering and Technology Amity University Punjab India

ISBN: (纸本)9789819752300

The film industry has evolved because of visual effects (VFX). Matte painting is a component of VFX and is important to VFX. Matte painting is a successful method for producing realistic visual effects and backgrounds for movies and television. To produce a scene or setting that can be utilized as a background in a movie or television show, this technique entails painting on a flat surface, such as a canvas or board. Filmmakers can depict a setting that is not actually there with the use of matte painting. The set will cost a lot of money to produce. This makes it possible to carry out actions that aren’t possible at the shooting site. This study paper’s aim is to investigate the background, methods, and applications of matte painting in the film and television industries. This essay also looks at the benefits and drawbacks of matte painting as well as its efficiency in producing realistic visual effects backdrops. A single work of art can now incorporate digital, photographic, and computer-generated imagery, providing artists with infinite options to create unique and cutting-edge pieces. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Television applications

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Strain and stress concentration of ductile composites in full-range deformation by digital image correlation

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Mechanics of Advanced Materials and Structures 2023年第18期30卷 3817-3825页

作者： Wu, Chang-Mou Kumar, Sanjay Lin, Po-Chun Chen, Jieng-Chiang Department of Materials Science and Engineering National Taiwan University of Science and Technology Taipei City Taiwan Department of Fashion Styling & Design Vanung University Chungli Dist. Taoyuan City Taiwan

This study investigates the variation in open-hole strain/stress concentrations within the full deformation range of a ductile self-reinforced poly (ethylene terephthalate) (srPET) composite using the digital image correlation (DIC). Subsequently, DIC was applied to brittle open-hole polymethyl methacrylate (PMMA) for comparison. This demonstrated the influence of the ductility of srPET. The strain concentration factor (Kɛ) of PMMA was constant with a full deformation range and agreed with theoretical concentration factor (Kt). By contrast, the Kɛ of srPETs was divided into five stages based on the propagation of yield extent (beginning from the hole edge) of the specimen, starting from Kt and then increasing to the peak, followed by the lowest value. © 2022 Taylor & Francis Group, LLC.

关键词： Strain measurement

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Preparation and Characterization of Lignin-Based Electrospun Fibers

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Palpu Chongi Gisul/Journal of Korea Technical Association of the Pulp and Paper Industry 2025年第1期57卷 67-77页

作者： Choi, Sa Rang Park, So Yeong Im, Hyeon Ji Lee, Young Soo Lee, Jung Myoung Agricultural Science and Technology Research Institute Kyungpook National University Korea Republic of Department of Wood and Paper Science Kyungpook National University Korea Republic of Dept. of Textile System Engineering Kyungpook National University Korea Republic of

Lignin, a byproduct of the pulping process, is an eco-friendly material that can potentially replace petroleum-based polymers and can be fabricated into nanocomposite fibers through electrospinning. This study explored the electrospinning of lignin/poly(ethylene oxide) (PEO) blends using two different lignin sources: softwood kraft lignin (SL) and bamboo organosolv lignin (BL). The effects of PEO content (3–6 wt%) and lignin type on solution properties and fiber formation were investigated. The viscosity of the spinning solutions increased with higher PEO content, and BL solutions exhibited higher viscosity than SL solutions under the same conditions. The fiber diameter increased with the PEO content, regardless of the lignin type, with diameters ranging from 320 to 878 nm. At the same PEO concentration, BL-based fibers exhibited larger diameters than SL-based fibers. Furthermore, when the PEO content exceeded 5 wt%, uniform, and bead-free nanofibers were successfully formed. These research findings demonstrate the potential for lignin-based nanofiber production. When utilizing bamboo organosolv lignin, it is expected that the amount of PEO additive can be reduced compared to softwood kraft lignin. © 2025 Korean Technical Assoc. of the Pulp and Paper Industry. All rights reserved.

关键词： Nanofibers

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