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A Truck Scheduling Problem for Multi-Crossdocking System with Metaheuristics

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Computers, Materials & Continua 2022年第9期72卷 5165-5178页

作者： Phan nguyen ky Phuc nguyen Van Thanh Duong Bao Tram International University-Vietnam National University Vietnam National UniversityHoChiMinh City70000Vietnam Faculty of Commerce Van Lang UniversityHo Chi Minh City70000Vietnam

The cross-docking is a very important subject in logistics and supply chain *** to the definition,cross-docking is a process dealing with transhipping inventory,in which goods and products are unloaded from an inbound truck and process through a flow-center to be directly loaded onto an outbound ***-docking is favored due to its advantages in reducing the material handing cost,the needs to store the product in warehouse,as well decreasing the labor cost by eliminating packaging,storing,pick-location and order *** cross-docking,products can be consolidated and transported as a full load,reducing overall distribution *** this paper,we focus on a truck scheduling at the multidoor,multi-crossdocking network with inventory constraints and process capability *** this model,a truck can visit severals docks for loading or unloading many types *** situation is very common in *** study also developed an exact mathematical model using mixedinteger linear programming(MILP)with the objective of minimizing the makespan to obtaint the benchmark in small scale *** scale problems are solved through Simulated Annealing(SA)algorithm and Tabu Search(TS)*** of these algorithms will be compared to benchmarks obtained from solver as well as to each other.

关键词： Truck scheduling multi-door multi-crossdocking network simulated annealing tabu search

Spatiotemporal Trend Analysis of Precipitation Extremes in Ho Chi Minh City, Vietnam During 1980–2017

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International Journal of Disaster Risk Science 2021年第1期12卷 131-146页

作者： nguyen Trong Quan Dao nguyen Khoi nguyen Xuan Hoan nguyen ky Phung Thanh Duc Dang Faculty of Environmental and Food Engineering Nguyen Tat Thanh UniversityHo Chi Minh City 700000Vietnam Faculty of Environment University of ScienceHo Chi Minh City 700000Vietnam Vietnam National University Ho Chi Minh City 700000Vietnam Ho Chi Minh City University of Food Industry Ho Chi Minh City 700000Vietnam Institute for Computational Science and Technology Ho Chi Minh City 700000Vietnam Engineering Systems and Design Pillar Singapore University of Technology and DesignTampines 487372Singapore

In this study,the spatiotemporal variability of trends in extreme precipitation events in Ho Chi Minh City during the period 1980–2017 was analyzed based on several core extreme precipitation indices(Rx1 day,Rx5 day,CDD,CWD,R20 mm,R25 mm,R95 p,and SDII).The nonparametric Mann–Kendall and Sen’s slope methods were used to compute the statistical strength,stability,and magnitude of trends in annual rainfall,as well as the extreme precipitation *** found that 64%of the stations had statistically significant upward trends in yearly rainfall,with high magnitudes frequently observed in the northern and southern regions of the *** the extreme precipitation indices,only SDII and R25 mm showed dominantly significant ***,there were increasing trends in the frequency and duration at the southern and central regions of the city during the study ***,El Ni?o-Southern Oscillation and Pacific Decadal Oscillation positively correlated with the duration and negatively correlated with the intensity and frequency of extreme ***,water management plans should be adjusted appropriately to reduce the severe impacts of precipitation extremes on communities and ecosystems.

关键词： Spatiotemporal trend Extreme precipitation Extreme precipitation indices Ho Chi Minh City

Scheduling Optimization Modelling:A Case Study of a Woven Label Manufacturing Company

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Computer Systems Science & Engineering 2021年第8期38卷 239-249页

作者： Chia-Nan Wang Zhao-Hong Cheng nguyen ky Phuc Phan Van Thanh nguyen Department of Industrial Engineering and Management National Kaohsiung University of Science and TechnologyKaohsiung80778TaiwanChina Department of International Business National Kaohsiung University of Science and TechnologyKaohsiung80778TaiwanChina Faculty of Industrial Engineering and Management International UniversityHo Chi Minh City70000Vietnam Faculty of Commerce Van Lang UniversityHo Chi Minh City70000Vietnam

Production scheduling involves all activities of building production schedules,including coordinating and assigning activities to each person,group of people,or machine and arranging work orders in each *** scheduling must solve all problems such as minimizing customer wait time,storage costs,and production time;and effectively using the enterprise’s human *** paper studies the application of flexible job shop modelling on scheduling a woven labelling *** labelling process includes several steps which are handled in different *** workstation is also comprised of several identical parallel *** this study,job splitting is allowed so that the power of work stations can be utilized *** final objective is to minimize the total completion time of all *** results show a significant improvement since the new planning may save more than 60%of lead time compared to the current *** contribution of this research is to propose a flexible job shop model for scheduling a woven labelling *** proposed approach can also be applied to support complex production scheduling processes under fuzzy environments in different industries.A practical case study demonstrates the effectiveness of the proposed model.

关键词： Flexible job shop scheduling Woven labelling Garment industry Optimization Production scheduling

Optimization Model in Manufacturing Scheduling for the Garment Industry

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Computers, Materials & Continua 2022年第6期71卷 5875-5889页

作者： Chia-Nan Wang Yu-Chen Wei Po-Yuk So Viet Tinh nguyen Phan nguyen ky Phuc Department of Industrial Engineering and Management National Kaohsiung University of Science and TechnologyKaohsiung80778Taiwan Department of Money and Banking National Kaohsiung University of Science and TechnologyKaohsiung80778Taiwan Ph.D.Program in Finance and Banking National Kaohsiung University of Science and TechnologyKaohsiung80778Taiwan Faculty of Commerce Van Lang UniversityHo Chi Minh CityVietnam Faculty of Industrial Engineering and Management International UniversityHo Chi Minh City70000Vietnam

The garment industry in Vietnam is one of the country’s strongest industries in the ***,the production process still encounters problems regarding scheduling that does not equate to an optimal *** paper introduces a production scheduling solution that resolves the potential delays and lateness that hinders the production process using integer programming and order allocation with a make-to-order manufacturing viewpoint.A number of constraints were considered in the model and is applied to a real case study of a factory in order to viewhowthe tardiness and latenesswould be affected which resulted in optimizing the scheduling time ***,the constraints considered were order assignments,production time,and tardiness with an objective function which is to minimize the total cost of *** results of the study precisely the overall cost of delay of the orders given to the plant and successfully propose a suitable production schedule that utilizes the most of the plant *** study has shown promising results that would assist plant and production managers in determining an algorithm that they can apply for their production process.

关键词： Production scheduling problem order allocation integer programming make-to-order manufacturing apparel industry

System Dynamics Forecasting on Taiwan Power Supply Chain

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Computer Systems Science & Engineering 2022年第6期41卷 1191-1205页

作者： Zhiqiu Yu Shuo-Yan Chou Phan nguyen ky Phuc Tiffany Hui-Kuang Yu Department of Industrial Management National Taiwan University of Science and TechnologyTaipei10607Taiwan Industrial Engineering and Management Department International UniversityHo Chi Minh City70000Vietnam Department of Public Finance Feng Chia UniversityTaichungTaiwan

This research aims to study the sustainability of Taiwan power supplychain based on system dynamics forecasting. The paper tries to investigate electricity shortage effects not only on the industrial side, but also from the standpointof society. In our model, different forecasting methods such as linear regression,time series analysis, and gray forecasting are also considered to predict the parameters. Further tests such as the structure, dimension, historical fit, and sensitivityof the model are also conducted in this paper. Through analysis forecasting result,we believe that the demand for electricity in Taiwan will continue to increase to acertain level for a period of time in the future. This phenomenon is closely relatedto Taiwan’s economic development, especially industrial development. We alsopoint out that electricity prices in Taiwan do not match with high industrialdemand, and that prices are still slightly low. Finally, the future growth trend ofTaiwan’s electricity demand has not changed, and ensuring adequate supply tomeet electricity demand to prevent potential power shortages will pose somedifficulty.

关键词： System dynamics taiwan power supply chain electricity demand

Face Mask Recognition for Covid-19 Prevention

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Computers, Materials & Continua 2022年第11期73卷 3251-3262页

作者： Trong Hieu Luu Phan nguyen ky Phuc Zhiqiu Yu Duy Dung Pham Huu Trong Cao College of Engineering Can Tho UniversityCan Tho city910900Viet Nam International University-Vietnam National University Vietnam National UniversityHoChiMinh City70000Vietnam Department of Industrial Management National Taiwan University of Science and TechnologyTaipei10607Taiwan

In recent years,the COVID-19 pandemic has negatively impacted all aspects of social *** to ease in the infected method,i.e.,through small liquid particles from the mouth or the nose when people cough,sneeze,speak,sing,or breathe,the virus can quickly spread and create severe problems for people’s *** to some research as well as World Health Organization(WHO)recommendation,one of the most economical and effective methods to prevent the spread of the pandemic is to ask people to wear the face mask in the public space.A face mask will help prevent the droplet and aerosol from person to person to reduce the risk of virus *** simple method can reduce up to 95%of the spread of the ***,this solution depends heavily on social consciousness,which is sometimes *** order to improve the effectiveness of wearing face masks in public spaces,this research proposes an approach for detecting and warning a person who does not wear or misuse the face *** approach uses the deep learning technique that relies on GoogleNet,AlexNet,and VGG16 *** results are synthesized by an ensemble method,i.e.,the bagging *** the experimental results,the approach represents a more than 95%accuracy of face mask recognition.

关键词： Face mask detection deep learning AlexNet GoogLeNet VGG16 ensemble method

Scheduling Flexible Flow Shop in Labeling Companies to Minimize the Makespan

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Computer Systems Science & Engineering 2022年第1期40卷 17-36页

作者： Chia-Nan Wang Hsien-Pin Hsu Hsin-Pin Fu nguyen ky Phuc Phan Van Thanh nguyen Department of Industrial Engineering and Management National Kaohsiung University of Science and TechnologyKaohsiung80778Taiwan Department of Supply Chain Management National Kaohsiung University of Science and TechnologyKaohsiung80778Taiwan Department of Marketing and Distribution Management National Kaohsiung University of Science and TechnologyKaohsiung80778Taiwan Faculty of Industrial Engineering and Management International UniversityHo Chi Minh City70000Vietnam Faculty of Commerce Van Lang UniversityHo Chi Minh City723000Vietnam

In the competitive global marketplace,production scheduling plays a vital role in planning in *** deals directly with the time to output products quickly and with a low production *** research examines case study of a Radio-Frequency Identification labeling department at Avery *** main objective of the company is to have a method that allows for the sequencing and scheduling of a set of jobs so it can be completed on or before the customer’s due date to minimize the number of late *** study analyzes the flexible flow shop scheduling problem with a sequence dependent setup by modifying the processing time and setup time to minimize the makespan on multiple *** on the defined mathematical model,this study includes an alternative approach and application of heuristic algorithm with the input being big *** optimization programs are used in this study and compared to determine which method can better solve the company’s *** proposed algorithm is able to improve machine utilization with large-scale problems.

关键词： Scheduling flexibleflowshop sequencedependentsetup just-in-time

越南和平水电站库区不同农林复合模式的环境效益比较

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农业工程学报 2015年第S1期31卷 291-297页

作者： Vu Thi Thuong nguyen the ky 王来张硕新西北农林科技大学林学院杨凌712100 越南林业大学林学院越南河内100803 陕西秦岭森林生态系统国家野外科学观测研究站杨凌712100

为了找出最适宜于越南中部山区、预期综合环境效益最佳的、更利于生态平衡的农林复合模式,该研究以越南和平水电站库区4种主要农林复合模式:马占相思树(Acacia mangium)-玉米(Zea mays)、马占相思树-木薯(Manihot esculenta crantz)、... 详细信息

为了找出最适宜于越南中部山区、预期综合环境效益最佳的、更利于生态平衡的农林复合模式,该研究以越南和平水电站库区4种主要农林复合模式:马占相思树(Acacia mangium)-玉米(Zea mays)、马占相思树-木薯(Manihot esculenta crantz)、赤桉树(Eucalyptus camandulensis)-旱稻(Oraza sativa)和马占相思树-木薯-玉米为研究对象,采用盖度、土壤理化性质、土壤蓄水能力、水土保持能力等指标进行环境效益的比较,最后得出的结论为:在4种农林复合模式中,马占相思树-木薯-玉米复合模式具有最高的水土保持效益和综合环境效益;赤桉树-旱稻复合模式的水土保持效益和综合环境效益均最低;实践中应该增加前者的种植面积,限制和减小后者的种植面积。在马占相思树-木薯-玉米复合模式的基础上加以改进,提出了预期综合环境效益更好的马占相思树-木薯-玉米-肉桂(Cinnamomum cassia)复合模式,为农林复合系统在和平水电站库区的应用提供更好的选择,同时也为世界上有类似气候环境条件的地区农林复合模式的采用提供参考。

关键词：土地利用生态林学农林复合系统环境效益马占相思树

A Comparative Study of Epi-up and Epi-Down Bonding of High Power 980 nm Single-Mode Semiconductor Lasers

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光学学报 2003年第S1期23卷 319-320页

作者： Martin Hai Hu Lawrence C Hughes Hong ky nguyen Catherine G. Caneau Chung-En Zah Corning Inc. SP-PR-02-1 Corning NY 14831 U.S.ACorning Inc. SP-PR-02-1 Corning NY 14831 U.S.ACorning Inc. SP-PR-02-1 Corning NY 14831 U.S.ACorning Inc. SP-PR-02-1 Corning NY 14831 U.S.ACorning Inc. SP-PR-02-1 Corning NY 14831 U.S.A

Epi-up and epi-down bonding of high power 980nm lasers have been studied in terms of bonding process, thermal behavior, optical performances, thermal stress effects and long-term laser reliability. We demonstrated that epi-down bonding can offer lower thermal resistance and improved optical performances without significantly degrading the long-term laser reliability.

关键词： down in of A Comparative Study of Epi-up and Epi-Down Bonding of High Power 980 nm Single-Mode Semiconductor Lasers nm for that mode