This work addresses the cut order planning(COP)problem for multi-color garment production,which is the first step in the clothing industry.First,a multi-objective optimization model of multicolor COP(MCOP)is establish...This work addresses the cut order planning(COP)problem for multi-color garment production,which is the first step in the clothing industry.First,a multi-objective optimization model of multicolor COP(MCOP)is established with production error and production cost as optimization objectives,combined with constraints such as the number of equipment and the number of layers.Second,a decoupled multi-objective optimization algorithm(DMOA)is proposed based on the linear programming decoupling strategy and non-dominated sorting in genetic algorithmsⅡ(NSGAII).The size-combination matrix and the fabric-layer matrix are decoupled to improve the accuracy of the algorithm.Meanwhile,an improved NSGAII algorithm is designed to obtain the optimal Pareto solution to the MCOP problem,thereby constructing a practical intelligent production optimization algorithm.Finally,the effectiveness and superiority of the proposed DMOA are verified through practical cases and comparative experiments,which can effectively optimize the production process for garment enterprises.展开更多
This paper investigates an optimal investment strategy on consumption and portfolio problem, in which the investor must withdraw funds continuously at a given rate. By analyzing the evolving process of wealth, we give...This paper investigates an optimal investment strategy on consumption and portfolio problem, in which the investor must withdraw funds continuously at a given rate. By analyzing the evolving process of wealth, we give the definition of safe-region for investment. Moreover, in order to obtain the target wealth as quickly as possible, using Bellman dynamic programming principle, we get the optimal investment strategy and corresponding necessary expected time. At last we give some numerical computations for a set of different parameters.展开更多
Due to the small size,active mobility,and intrinsic softness,miniature soft robots hold promising po-tentials in reaching the deep region inside living bodies otherwise inaccessible with compelling agility,adaptabilit...Due to the small size,active mobility,and intrinsic softness,miniature soft robots hold promising po-tentials in reaching the deep region inside living bodies otherwise inaccessible with compelling agility,adaptability and safety.Various materials and actuation strategies have been developed for creating soft robots,among which,ferromagnetic soft materials that self-actuate in response to external magnetic fields have attracted worldwide attention due to their remote controllability and excellent compatibil-ity with biological tissues.This review presents comprehensive and systematic research advancements in the design,fabrication,and applications of ferromagnetic soft materials for miniature robots,providing in-sights into their potential use in biomedical fields and beyond.The programming strategies of ferromag-netic soft materials are summarized and classified,including mold-assisted programming,3D printing-assisted programming,microassembly-assisted programming,and magnetization reprogramming.Each approach possesses unique advantages in manipulating the magnetic responsiveness of ferromagnetic soft materials to achieve outstanding actuation and deformation performances.We then discuss the biomedi-cal applications of ferromagnetic soft material-based soft robots(e.g.,minimally invasive surgery,targeted delivery,and tissue engineering),highlighting their potentials in revolutionizing biomedical technologies.This review also points out the current challenges and provides insights into future research directions,which we hope can serve as a useful reference for the development of next-generation adaptive miniature robots.展开更多
The Chinese automotive indus-try has a history of nearly 50 years with the vehicle population up to 15 million by now. With sustainable national economic boom and growth of personal income, more and more private cars ...The Chinese automotive indus-try has a history of nearly 50 years with the vehicle population up to 15 million by now. With sustainable national economic boom and growth of personal income, more and more private cars will appear in China. It is predicated that the private car will keep a stable growing trend in the future. And along with the de-velopment of the automotive indus-try and increase of the vehicle parc, environment pollution展开更多
Objectives:Papua New Guinea(PNG)has among the highest rates of sexually transmitted infections(STIs)globally and is committed to reducing their incidence.The Syphilis Interventions Towards Elimination(SITE)model was u...Objectives:Papua New Guinea(PNG)has among the highest rates of sexually transmitted infections(STIs)globally and is committed to reducing their incidence.The Syphilis Interventions Towards Elimination(SITE)model was used to explore the expected impact and cost of alternative syphilis intervention scale-up scenarios.Methods:SITE is a dynamical model of syphilis transmission among adults 15-49 years.Individuals are divided into nine groups based on sexual behaviour and into six stages of infection.The model was calibrated to PNG using data from routine surveillance,biobehavioural surveys,research studies and program records.Inputs included syphilis prevalence,risk behaviours,intervention coverage and service delivery unit costs.Scenarios compared different interventions(clinical treatment,contact tracing,syphilis screening,and condom promotion)for incidence and cost per infection averted over 2021-2030.Results:Increasing treatment coverage of symptomatic primary/secondary-stage syphilis cases from 25-35%in 2020 to 60%from 2023 onwards reduced estimated incidence over 2021-2030 by 55%,compared to a scenario assuming constant coverage at 2019-2020 levels.The introduction of contact tracing in 2020,assuming 0.4 contacts per symptomatic person treated,reduced incidence over 2021-2030 by 10%.Increasing screening coverage by 20-30 percentage points from the 2019-2020 level reduced incidence over 2021-2030 by 3e16%depending on the target population.Scaling-up clinical,symptom-driven treatment and contact tracing had the lowest cost per infection averted,followed by condom promotion and periodic screening of female sex workers and men who have sex with men.Conclusions:PNG could considerably reduce its syphilis burden by scaling-up clinical treatment and contact tracing alongside targeted behavioural risk reduction interventions.SITE is a useful tool countries can apply to inform national STI programming and resource allocation.展开更多
基金Supported by the Natural Science Foundation of Zhejiang Province(No.LQ22F030015).
文摘This work addresses the cut order planning(COP)problem for multi-color garment production,which is the first step in the clothing industry.First,a multi-objective optimization model of multicolor COP(MCOP)is established with production error and production cost as optimization objectives,combined with constraints such as the number of equipment and the number of layers.Second,a decoupled multi-objective optimization algorithm(DMOA)is proposed based on the linear programming decoupling strategy and non-dominated sorting in genetic algorithmsⅡ(NSGAII).The size-combination matrix and the fabric-layer matrix are decoupled to improve the accuracy of the algorithm.Meanwhile,an improved NSGAII algorithm is designed to obtain the optimal Pareto solution to the MCOP problem,thereby constructing a practical intelligent production optimization algorithm.Finally,the effectiveness and superiority of the proposed DMOA are verified through practical cases and comparative experiments,which can effectively optimize the production process for garment enterprises.
文摘This paper investigates an optimal investment strategy on consumption and portfolio problem, in which the investor must withdraw funds continuously at a given rate. By analyzing the evolving process of wealth, we give the definition of safe-region for investment. Moreover, in order to obtain the target wealth as quickly as possible, using Bellman dynamic programming principle, we get the optimal investment strategy and corresponding necessary expected time. At last we give some numerical computations for a set of different parameters.
基金the National Key R&D Program of China(No.2023YFE0208700)National Natural Sci-ence Foundation of China(No.92163109 and 52072095)+7 种基金Shenzhen Science and Technology Program(No.RCJC20231211090000001,GXWD20231129101105001)the National Natural Science Foundation of China(No.52205590)the Natural Science Foundation of Jiangsu Province(No.BK20220834)the Start-up Research Fund of Southeast University(No.RF1028623098)the State Key Laboratory of Robotics and Systems(HIT)(No.SKLRS-2024-KF-11)National Natural Science Foundation of China(No.52202348)Guangdong Basic and Applied Basic Research Foundation(No.2023A1515011491)Shenzhen Science and Technology Program(Nos.GXWD20220818224716001,KJZD20231023100302006).
文摘Due to the small size,active mobility,and intrinsic softness,miniature soft robots hold promising po-tentials in reaching the deep region inside living bodies otherwise inaccessible with compelling agility,adaptability and safety.Various materials and actuation strategies have been developed for creating soft robots,among which,ferromagnetic soft materials that self-actuate in response to external magnetic fields have attracted worldwide attention due to their remote controllability and excellent compatibil-ity with biological tissues.This review presents comprehensive and systematic research advancements in the design,fabrication,and applications of ferromagnetic soft materials for miniature robots,providing in-sights into their potential use in biomedical fields and beyond.The programming strategies of ferromag-netic soft materials are summarized and classified,including mold-assisted programming,3D printing-assisted programming,microassembly-assisted programming,and magnetization reprogramming.Each approach possesses unique advantages in manipulating the magnetic responsiveness of ferromagnetic soft materials to achieve outstanding actuation and deformation performances.We then discuss the biomedi-cal applications of ferromagnetic soft material-based soft robots(e.g.,minimally invasive surgery,targeted delivery,and tissue engineering),highlighting their potentials in revolutionizing biomedical technologies.This review also points out the current challenges and provides insights into future research directions,which we hope can serve as a useful reference for the development of next-generation adaptive miniature robots.
文摘The Chinese automotive indus-try has a history of nearly 50 years with the vehicle population up to 15 million by now. With sustainable national economic boom and growth of personal income, more and more private cars will appear in China. It is predicated that the private car will keep a stable growing trend in the future. And along with the de-velopment of the automotive indus-try and increase of the vehicle parc, environment pollution
基金Financial support for this work was provided by the World Health Organization(WHO)PNG Country Office.
文摘Objectives:Papua New Guinea(PNG)has among the highest rates of sexually transmitted infections(STIs)globally and is committed to reducing their incidence.The Syphilis Interventions Towards Elimination(SITE)model was used to explore the expected impact and cost of alternative syphilis intervention scale-up scenarios.Methods:SITE is a dynamical model of syphilis transmission among adults 15-49 years.Individuals are divided into nine groups based on sexual behaviour and into six stages of infection.The model was calibrated to PNG using data from routine surveillance,biobehavioural surveys,research studies and program records.Inputs included syphilis prevalence,risk behaviours,intervention coverage and service delivery unit costs.Scenarios compared different interventions(clinical treatment,contact tracing,syphilis screening,and condom promotion)for incidence and cost per infection averted over 2021-2030.Results:Increasing treatment coverage of symptomatic primary/secondary-stage syphilis cases from 25-35%in 2020 to 60%from 2023 onwards reduced estimated incidence over 2021-2030 by 55%,compared to a scenario assuming constant coverage at 2019-2020 levels.The introduction of contact tracing in 2020,assuming 0.4 contacts per symptomatic person treated,reduced incidence over 2021-2030 by 10%.Increasing screening coverage by 20-30 percentage points from the 2019-2020 level reduced incidence over 2021-2030 by 3e16%depending on the target population.Scaling-up clinical,symptom-driven treatment and contact tracing had the lowest cost per infection averted,followed by condom promotion and periodic screening of female sex workers and men who have sex with men.Conclusions:PNG could considerably reduce its syphilis burden by scaling-up clinical treatment and contact tracing alongside targeted behavioural risk reduction interventions.SITE is a useful tool countries can apply to inform national STI programming and resource allocation.
