Wireless Sensor Network(WSN)is a cornerstone of Internet of Things(IoT)and has rich application scenarios.In this work,we consider a heterogeneous WSN whose sensor nodes have a diversity in their Residual Energy(RE).I...Wireless Sensor Network(WSN)is a cornerstone of Internet of Things(IoT)and has rich application scenarios.In this work,we consider a heterogeneous WSN whose sensor nodes have a diversity in their Residual Energy(RE).In this work,to protect the sensor nodes with low RE,we investigate dynamic working modes for sensor nodes which are determined by their RE and an introduced energy threshold.Besides,we employ an Unmanned Aerial Vehicle(UAV)to collect the stored data from the heterogeneous WSN.We aim to jointly optimize the cluster head selection,energy threshold and sensor nodes’working mode to minimize the weighted sum of energy con-sumption from the WSN and UAV,subject to the data collection rate constraint.To this end,we propose an efficient search method to search for an optimal energy threshold,and develop a penalty-based successive convex approximation algorithm to select the cluster heads.Then we present a low-complexity iterative approach to solve the joint optimization problem and discuss the implementation procedure.Numerical results justify that our proposed approach is able to reduce the energy consumption of the sensor nodes with low RE significantly and also saves energy for the whole WSN.展开更多
随着城市现代化的建设和发展,城市洪涝安全问题日益突出,近几年我国频繁出现城市内涝灾害,给广大人民群众生命财产造成损失。国内多地已经在城市规划中对城市洪涝安全问题开展专项评估,以广州市某规划地块为例,基于Info Works ICM城市...随着城市现代化的建设和发展,城市洪涝安全问题日益突出,近几年我国频繁出现城市内涝灾害,给广大人民群众生命财产造成损失。国内多地已经在城市规划中对城市洪涝安全问题开展专项评估,以广州市某规划地块为例,基于Info Works ICM城市综合流域排水模型软件,构建区域排水管网模型,对多种设计工况下的区域排水管网排水能力和积水深度进行模拟,可为城市防洪排涝系统和海绵城市提供规划和建设的依据。展开更多
现如今城市进程发展迅速,高层建筑不断增加,高楼幕墙的清洗问题随之而来,传统的人工清洗危险系数高、清洗成本大、清洗效率低。针对这些问题,本文介绍一款履带式幕墙清洗机器人,使用Solid Works 2019软件建立起了履带式幕墙清洗机器人...现如今城市进程发展迅速,高层建筑不断增加,高楼幕墙的清洗问题随之而来,传统的人工清洗危险系数高、清洗成本大、清洗效率低。针对这些问题,本文介绍一款履带式幕墙清洗机器人,使用Solid Works 2019软件建立起了履带式幕墙清洗机器人的驱动单元、抽水及蓄水单元、吸附单元、清洗单元、卷扬机单元、设备主体几部分的三维模型,可实现幕墙清洗机器人的移动、吸附、清洗三大功能。本设计以高楼幕墙清洁为前提,布局设计合理,功能齐全,材料经济轻便、运行安全稳定,是一款高效可靠的幕墙清洗机器人。展开更多
On December 19,2023,Exhibition"Shining Hong Kong-Xu Li's Art Works Collection"was grandly opened at the Hong Kong Convention and Exhibition Centre.This exhibition displays more than 80 oil paintings and ...On December 19,2023,Exhibition"Shining Hong Kong-Xu Li's Art Works Collection"was grandly opened at the Hong Kong Convention and Exhibition Centre.This exhibition displays more than 80 oil paintings and Chinese paintings by Mr.Xu Li.展开更多
One of the goals and requirements of China’s educational modernization includes prioritizing,guiding,and promoting the social service capabilities of universities.The teaching of practical courses in design majors in...One of the goals and requirements of China’s educational modernization includes prioritizing,guiding,and promoting the social service capabilities of universities.The teaching of practical courses in design majors in colleges and universities has long been plagued by problems such as being“out of touch with the market and social needs”and“ignoring the cultivation of creativity.”It fails to meet the goals and requirements of educational modernization.This article takes the“Fundamentals of Styling and Comprehensive Expression”course offered by the School of Design of Guangxi Normal University as an entry point to study the industry-university-research education method that combines“social service”with the teaching of design professional practical courses.It also attempts to improve“works,products,and public goods”through the establishment of the theoretical model of“product”and the analysis of practical application paths is carried out to solve the problems existing in the traditional teaching of the design major,enhance the social service capabilities of the design major,promote talent employment and industry and social development,and carry out teaching reform attempts.展开更多
基金supported in part by the National Nature Science Foundation of China under Grant 62001168in part by the Foundation and Application Research Grant of Guangzhou under Grant 202102020515.
文摘Wireless Sensor Network(WSN)is a cornerstone of Internet of Things(IoT)and has rich application scenarios.In this work,we consider a heterogeneous WSN whose sensor nodes have a diversity in their Residual Energy(RE).In this work,to protect the sensor nodes with low RE,we investigate dynamic working modes for sensor nodes which are determined by their RE and an introduced energy threshold.Besides,we employ an Unmanned Aerial Vehicle(UAV)to collect the stored data from the heterogeneous WSN.We aim to jointly optimize the cluster head selection,energy threshold and sensor nodes’working mode to minimize the weighted sum of energy con-sumption from the WSN and UAV,subject to the data collection rate constraint.To this end,we propose an efficient search method to search for an optimal energy threshold,and develop a penalty-based successive convex approximation algorithm to select the cluster heads.Then we present a low-complexity iterative approach to solve the joint optimization problem and discuss the implementation procedure.Numerical results justify that our proposed approach is able to reduce the energy consumption of the sensor nodes with low RE significantly and also saves energy for the whole WSN.
文摘随着城市现代化的建设和发展,城市洪涝安全问题日益突出,近几年我国频繁出现城市内涝灾害,给广大人民群众生命财产造成损失。国内多地已经在城市规划中对城市洪涝安全问题开展专项评估,以广州市某规划地块为例,基于Info Works ICM城市综合流域排水模型软件,构建区域排水管网模型,对多种设计工况下的区域排水管网排水能力和积水深度进行模拟,可为城市防洪排涝系统和海绵城市提供规划和建设的依据。
文摘现如今城市进程发展迅速,高层建筑不断增加,高楼幕墙的清洗问题随之而来,传统的人工清洗危险系数高、清洗成本大、清洗效率低。针对这些问题,本文介绍一款履带式幕墙清洗机器人,使用Solid Works 2019软件建立起了履带式幕墙清洗机器人的驱动单元、抽水及蓄水单元、吸附单元、清洗单元、卷扬机单元、设备主体几部分的三维模型,可实现幕墙清洗机器人的移动、吸附、清洗三大功能。本设计以高楼幕墙清洁为前提,布局设计合理,功能齐全,材料经济轻便、运行安全稳定,是一款高效可靠的幕墙清洗机器人。
文摘On December 19,2023,Exhibition"Shining Hong Kong-Xu Li's Art Works Collection"was grandly opened at the Hong Kong Convention and Exhibition Centre.This exhibition displays more than 80 oil paintings and Chinese paintings by Mr.Xu Li.
基金A phased research result of the 2023 Guangxi Normal University Education and Teaching Reform Project“Research on the Social Service-Oriented Industry-University-Research Education Method for College Design Majors”(Project number:2023JGA34)A phased research result of the 2023 Innovation Project of Guangxi Graduate Education“Innovation Transformation·Integration of Industry and Education-Research on the Integration Path of Zhuang Intangible Cultural Heritage and Master of Arts Course Teaching”(Project number:JGY2023052)。
文摘One of the goals and requirements of China’s educational modernization includes prioritizing,guiding,and promoting the social service capabilities of universities.The teaching of practical courses in design majors in colleges and universities has long been plagued by problems such as being“out of touch with the market and social needs”and“ignoring the cultivation of creativity.”It fails to meet the goals and requirements of educational modernization.This article takes the“Fundamentals of Styling and Comprehensive Expression”course offered by the School of Design of Guangxi Normal University as an entry point to study the industry-university-research education method that combines“social service”with the teaching of design professional practical courses.It also attempts to improve“works,products,and public goods”through the establishment of the theoretical model of“product”and the analysis of practical application paths is carried out to solve the problems existing in the traditional teaching of the design major,enhance the social service capabilities of the design major,promote talent employment and industry and social development,and carry out teaching reform attempts.
