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2024 IEEE International Conference on Technology Management, Operations and Decisions, ICTMOD 2024

作者： Abduljaleel, Jazeem Aldurgam, Mohammad Industrial and Systems Engineering Department Saudi Arabia King Fahd University of Petroleum and Minerals Interdisciplinary Research Center for Smart Mobility and Logistics Dhahran31261 Saudi Arabia

ISBN: (纸本)9798350367355

This paper presents a stochastic dynamic capacity expansion planning model, formulated using a Markov Decision Process (MDP). We characterize the optimal policy and prove the existence of a threshold-type structured policy. In particular, we provide a novel proof by demonstrating the subadditivity of the cost model, resulting in increased computational efficiency. © 2024 IEEE.

关键词： Stochastic systems

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A study on the feasibility of friction stir welding in joining dissimilar metals for SS400 and Ti-6Al-4V 9

A study on the feasibility of friction stir welding in joini...

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9th International Conference on Precision Machinery and Manufacturing Technology, ICPMMT 2024

作者： Hsieh, M.J. Chu, L.M. Chang, Y.P. Department of Power Mechanical Engineering National Taitung Junior College Taitung950303 Taiwan Interdisciplinary Program of Green and Information Technology National Taitung University Taitung95092 Taiwan Department of Mechanical Engineering Kun Shan University Tainan71000 Taiwan

This study designed friction stir multi-pass welding machine to conduct friction stir welding on carbon steel/titanium alloy clad sheets. The experimental process utilized the pin and pinless tools. The results demonstrate that the two dissimilar materials can be welded using the assembly-embedded rod pinless tool under the following welding conditions: a rotational speed of 1200 rpm, a downward force of 4 kN, a welding speed of 15 mm/min, and tool offset distances of 5 and 10 mm. Furthermore, this study investigated the microstructure and mechanical properties of the weld. In addition, the peak temperature measured at the joint interface exceeded the β phase transition temperature of the titanium alloy and surpassed 1000oC. The shear tensile test shows the weld's failure load was about 4300 N. The intermetallic compound at the welding interface has a microhardness value of approximately 400 Hv. According to the results of SEM observations and EDS composition element analysis, the elements of low carbon steel and titanium alloy at the interface of the clad sheet diffused and formed Fe-Ti intermetallic compounds. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Titanium alloys

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Optimal Resource Allocation for NOMA Wireless Networks

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Computers, Materials & Continua 2023年第2期74卷 3249-3261页

作者： Fahad R.Albogamy M.A.Aiyashi Fazirul Hisyam Hashim Imran Khan Bong Jun Choi Turabah University College Computer Sciences ProgramTaif UniversityP.O.Box 11099Taif21944Saudi Arabia Department of Mathematics Jazan UniversityJazanP.O.Box 218Saudi Arabia Department of Computer and Communication Systems Engineering Faculty of EngineeringUniversiti Putra Malaysia(UPM)43400SerdangMalaysia Department of Electrical Engineering University of Engineering and Technology PeshawarP.O.Box 814Pakistan School of Computer Science and Engineering Soongsil UniversitySeoulKorea

The non-orthogonal multiple access(NOMA)method is a novel multiple access technique that aims to increase spectral efficiency(SE)and accommodate enormous user ***-user signals are superimposed and transmitted in the power domain at the transmitting end by actively implementing controllable interference information,and multi-user detection algorithms,such as successive interference cancellation(SIC),are performed at the receiving end to demodulate the necessary user *** its basic signal waveform,like LTE baseline,could be based on orthogonal frequency division multiple access(OFDMA)or discrete Fourier transform(DFT)-spread OFDM,NOMA superimposes numerous users in the power *** contrast to the orthogonal transmission method,the nonorthogonal method can achieve higher spectrum ***,it will increase the complexity of its *** power allocation techniques will have a direct impact on the system’s *** a result,in order to boost the system capacity,an efficient power allocation mechanism must be *** research developed an efficient technique based on conjugate gradient to solve the problem of downlink power *** major goal is to maximize the users’maximum weighted sum *** suggested algorithm’s most notable feature is that it converges to the global optimal *** compared to existing methods,simulation results reveal that the suggested technique has a better power allocation capability.

关键词： Non-orthogonalmultiple access wireless networks power domain 5G networks

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Transferrin-Mediated Nanophotosensitizer to Enhance Phototherapy with Photoacoustic Imaging Under Hypoxia

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CCS Chemistry 2025年第4期7卷 1127-1141页

作者： Mengyao Yang Yunyoung Nah Donghyeon Oh Xingshu Li Heejeong Kim Sinyoung Park Junha Lim Aibing Chen Chulhong Kim Won Jong Kim Juyoung Yoon College of Chemical and Pharmaceutical Engineering Hebei University of Science and TechnologyShijiazhuang 050018 Department of Chemistry and Nanoscience Ewha Womans UniversitySeoul 03760 Department of Chemistry POSTECH-Catholic Biomedical Engineering InstitutePOSTECHPohang 37673 Department of Electrical Engineering Convergence IT EngineeringMechanical Engineeringand Medical Science and EngineeringMedical Device Innovation CenterPOSTECHPohang 37673 Fujian Provincial Key Laboratory of Cancer Metastasis Chemoprevention and Chemotherapy College of ChemistryFuzhou UniversityFuzhou 350108 School of Interdisciplinary Bioscience and Bioengineering POSTECHPohang 37673 Graduate Program in Innovative Biomaterials Convergence Ewha Womans UniversitySeoul 03760

Various obstacles[poor tissue penetration,hypoxic tumor microenvironment,and reactive oxygen species(ROS)production quenching due to aggregation]obstruct imaging-guided high-efficiency phototherapy targeting ***,nanophthalocyanine(ZnPcN4-TF)is elaborately designed based on a synthetic phthalocyanine derivative(ZnPcN4)and nonimmunogenic transferrin(TF)through multiple noncovalent interactions for photoacoustic(PA)imaging-guided *** conjugating electron-rich amino groups effectively suppressed fluorescence and ROS generation due to the strong photoinduced electron transfer effect,ZnPcN4 became an ideal photothermal and PA imaging ***4-TF not only effectively targeted tumor sites and accumulated there,but also,surprisingly,facilitated the enhancement of ROS production via a type I process in an aggregate compared to ZnPcN4 itself,potentially due to accelerated electron ***,ZnPcN4-TF had a substantially more powerful photothermal effect than ZnPcN4 ***,this design effectively overcomes the obstacles to photodynamic therapy(aggregation-related ROS generation quenching in a hypoxic environment).Furthermore,PA imaging solves the tissue penetration challenge in optical *** study provides a broader base for designing novel photosensitizers to improve phototherapy under hypoxia.

关键词： photoacoustic imaging type I reactive oxygen species photothermal effect tumor accumulation self-assembly

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Investigation of the Effects of Temperature and Contact Pressure on the Friction Coefficient in Uncoated PHS2000 Steel Plates 12th

Investigation of the Effects of Temperature and Contact Pres...

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12th Brazilian Manufacturing engineering Congress, COBEF 2023

作者： dos Santos Silva, Bruno Caetano Seixas, Luã Fonseca Folle, Luis Fernando Dourado, Alexandre Ferraz Lima, Tiago Nunes Coelho, Rodrigo Santiago Batalha, Gilmar Ferreira Salvador Brazil Department of Mechatronics and Mechanical Systems Engineering Polytechnic School of Engineering University of Sao Paulo Sao Paulo Brazil Postgraduate Program MPDS/GETEC/MCTI SENAI CIMATEC Salvador Brazil

ISBN: (纸本)9783031435546

Manganese-boron steels are widely used in hot stamping, resulting in 1500 MPa (PHS 1500) or even 2000 MPa (PHS 2000) tensile strength after the hot stamping process. These steels are most commonly used in industry in the form of AlSi-coated sheets. However, recent developments are being made to enable the application of uncoated steels, resulting in cost reduction, but bringing technological challenges to be overcome. The coefficient of friction (µ) is a fundamental parameter in sheet metal forming and is influenced by several factors, such as: surface roughness, working temperature, lubrication, contact pressure and sliding speed. In hot stamping, it is known that the temperature can have a great influence on µ values for coated plates, but there is little information about uncoated steels. This work aims to investigate the tribological behavior of uncoated PHS 2000 steel plates using the pin-on-disk test. Tests were carried out under three temperatures (800 °C, 600 °C and 400 °C) and contact pressures of 5 and 10 MPa. Results showed that the friction coefficient tends to reduce with increasing temperature at a pressure of 5 MPa, as result of oxide formation on the steel’s surface. However, at a pressure of 10 MPa, this reduction was not observed. © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Temperature

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Parallel Control System PD-SMCNN for Robust Autonomous Mini-Quadcopter 23

Parallel Control System PD-SMCNN for Robust Autonomous Mini-...

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23rd International Seminar on Intelligent Technology and Its Applications, ISITIA 2022

作者： Wahyuadnyana, Kadek Dwi Darwito, Purwadi Agus Physics Engineering Master Program Faculty of Industrial Technology and Systems Engineering Surabaya Indonesia Faculty of Industrial Technology and Systems Engineering Physics Engineering Department Surabaya Indonesia

ISBN: (数字)9781665460811

ISBN: (纸本)9781665460811

A parallel control system with proportional-derivative (PD) and sliding mode control-neural network (SMCNN) has been designed to control the position and attitude of mini-quadcopter parrot mambo mini-drone (PMD). This PDSMCNN control scheme is implemented in the PMD system through a 3D environment using MATLAB-Simulink, which represented the real conditions. The PD controller is used to reach the minimum value of the gain for the PMD getting to take-off, while the SMC as a robust controller is adjusted using a backpropagation neural network (NN) to make the PMD more robust regarding an external disturbance. The software and hardware simulation have been conducted to validate the proposed controller with a mission plan as an input. Based on the simulation results, the PD controller shows an overshoot of 26.7% then becomes 0% of overshoot when the PD-SMCNN controller is implemented. From the hardware simulation results, it is found that the PD controller has 45.1% of robustness and the PD-SMCNN controller has 100% of robustness in the absence of external disturbance. Next, it is found that the PD controller has 26.9% of robustness and the PD-SMCNN has 74.8% of robustness in the presence of external disturbance. Based on these results, indicates that the proposed PD-SMCNN controller is superior to the PD controller in terms of robustness. © 2022 IEEE.

关键词： Neural networks

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Initial Exploration and Understanding of Parameters for Successful Enterprise Architecture Implementation 11

Initial Exploration and Understanding of Parameters for Succ...

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11th International Conference on ICT for Smart Society, ICISS 2024

作者： Khairina, Dyna Marisa Purwanto, Purwanto Nugraheni, Dinar Mutiara Kusumo School of Postgraduate Studies Universitas Diponegoro Program in Information Systems Semarang Indonesia Universitas Diponegoro Faculty of Engineering Department of Chemical Engineering Semarang Indonesia Universitas Diponegoro Faculty of Science and Mathematics Department of Informatics Semarang Indonesia

ISBN: (纸本)9798350389654

This study provides an initial exploration and further understanding of the factors that are parameters in evaluating the success of Enterprise Architecture (EA) implementation. An evaluation process is needed to ensure that the EA project implementation provides effectiveness, efficiency, and feasibility of the EA information system as well as assessing previous project experience to avoid future EA project risks. The research aims to present a Systematic Literature Review based on the stages of identification, screening, eligibility, and inclusion so that 14 main articles are selected for review with strong actual relevance. The study results provide insights and references that can be used to further explore key factors in evaluating the success of EA implementation in the future. It was found that there were ten factors that most influenced the evaluation of the success of EA implementation and it was concluded that two potential factors were the most influential and required further exploration in evaluating the success of EA implementation which could be applied in various sectors/dimensions. This study contributes as an initial reference for overcoming problems in investigating and exploring the factors that influence the success of EA implementation as an effort to assess the success of achieving future organizational goals. © 2024 IEEE.

关键词： Enterprise Architecture Parameters Success Factors Systematic Literature Review

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Modeling of an external force estimator for an end-effector of a robot by neural networks

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Journal of the Chinese Institute of Engineers, Transactions of the Chinese Institute of Engineers,Series A 2023年第8期46卷 895-904页

作者： Junplod, Goragod Kornmaneesang, Woraphrut Chen, Shyh-Leh Wongsa, Sarawan Department of Control Systems and Instrumentation Engineering King Mongkut’s University of Technology Thonburi Bangkok Thailand International Bachelor Program in Engineering Yuan Ze University Taoyuan Taiwan Department of Mechanical Engineering National Chung Cheng University Chiayi Taiwan Advanced Institute of Manufacturing with High-Tech Innovations National Chung Cheng University Chiayi Taiwan

This paper proposes a method to estimate external forces at the tip of a robot end-effector by using a neural network model. In order to avoid the use of an expensive force sensor in the training purpose, the proposed method implements the indirect training method by including the inverse dynamic model of the robot manipulator to the training algorithm with available information from a default robot system. In this method, the robot dynamics equations are necessary for the training, therefore a disturbance observer is adopted to deal with the existing uncertainties and errors. The performance of the proposed estimation method is evaluated through experiments of a 5-DOF robotic experimental platform, comparing to another existing estimation method using recurrent neural network with a type-1 disturbance observer for the external force estimation. The estimation results show that the behavior of the estimated external forces strongly correlates with the applied external forces and the proposed method is superior to the other method. © 2023 The Chinese Institute of Engineers.

关键词： Recurrent neural networks

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BLOCKCHAIN TECHNOLOGY FOR TRACEABILITY OF HAZARDOUS MATERIAL IN SEAPORTS 50

BLOCKCHAIN TECHNOLOGY FOR TRACEABILITY OF HAZARDOUS MATERIAL...

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50th International Conference on Computers and Industrial engineering: Sustainable Digital Transformation, CIE 2023

作者： Alshaikh, R. Ahmed, V. Bahroun, Z. Engineering Systems and Management PhD Program College of Engineering American University of Sharjah Sharjah United Arab Emirates Department of Industrial Engineering American University of Sharjah Sharjah United Arab Emirates

ISBN: (纸本)9781713886952

Maritime shipping plays a pivotal role in the global transportation system, providing safety and cost-effectiveness. However, it encounters numerous challenges, including port congestion, delivery delays, complex paperwork, unreliable reports on hazardous materials, and difficulties in tracing containers. To address these issues and mitigate risks associated with the transportation of hazardous goods, researchers have explored the implementation of blockchain technology in the maritime sector. Blockchain offers decentralization, transparency, and auditability of transactions, as well as the ability to trace and track cargo, particularly hazardous materials. Despite its potential, there is limited research available on the practical implementation of blockchain for hazardous material traceability. This research paper aims to investigate the application of blockchain technology in enhancing hazardous material traceability in seaports, contributing to the growing body of knowledge regarding blockchain's potential in this area and providing valuable insights for future research and practical implementations. Moreover, the paper suggests a preliminary framework for an optimized blockchain algorithm for hazardous material traceability. The main findings highlight the significant potential of blockchain technology in improving traceability of hazardous materials in seaports. Real-time tracking and monitoring of hazardous materials from origin to destination can be achieved through blockchain's distributed nature, reducing the risk of data manipulation or fraud. The immutability of blockchain records ensures the integrity and accuracy of critical data related to material composition, handling procedures, and safety certifications. Furthermore, blockchain's decentralized control allows for collaborative traceability in seaports, involving stakeholders such as port authorities, shipping companies, regulatory bodies, and manufacturers. This distributed governance model promote

关键词： Blockchain

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Contracted product of hypermatrices via STP of matrices

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Control Theory and Technology 2023年第3期21卷 265-280页

作者： Daizhan Cheng Min Meng Xiao Zhang Zhengping Ji Key Laboratory of Systems and Control Academy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190China Department of Control Science and Engineering School of Electronics and Information EngineeringTongji UniversityShanghai 201210China National Center for Mathematics and Interdisciplinary Sciences Chinese Academy of SciencesBeijing 100190China School of Mathematical Sciences University of Chinese Academy of SciencesBeijing 100149China

An equivalent definition of hypermatrices is *** matrix expression of hypermatrices is *** permu-tation matrices,the conversion between different matrix expressions is *** various kinds of contracted products of hyper... 详细信息

关键词： d-hypermatrix Matrix expression Permutation matrices-Contracted product Semi-tensor product(STP)

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