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Unmanned Aerial Vehicle co.trol of Major Sugarcane Diseases and Pests in Low Latitude Plateau

Agricultural Biotechnology 2019年第4期8卷 48-51页

作者： Xiaoyan WANG Rongyue ZHANG Hongli SHAN Yuanhong FAN Hong XU Pizhong HUANG Zejuan LI Tingying DUAN Ning KANG Wenfeng LI Yingkun HUANG Sugarcane Research Institute Yunnan Academy of Agricultural SciencesKaiyuan 661699China Yunnan Plateau Characteristic Agricultural Industry Research Institute Kunming 650201China Yunnan Zichen Agricultural Development co.LTD Xiangyun 672100China Lincang Nanhua Sugar Industry co.LTD Lincang 677500China Yunnan Kaimike Agricultural Technology Service co.LTD Kunming 650000China Dehong Sugarcane Research Institute Longchuan 678707China

This research was aimed at the defects in traditional artificial spraying co.trol method and the problems such as the difficulty in pesticides applying,labor shortage and low operating efficiency in the middle and late stage of sugarcane high stalk *** aerial pesticide application technology for sugarcane main diseases and pests was systematically developed and demonstrated from the aspects of aircraft type choice,selection of special pesticides and auxiliaries,integration of pesticides and equipment,field operation,technical specifications,and large-scale application organization *** UAV model and flight technical parameters suitable for the sugarcane planting area in low-latitude plateau were analyzed,and the optimal agent formulation co.bination and application technology of the UAV flight co.trol were screened out,and the UAV flight co.trol was applied to the major sugarcane pests and diseases co.trol in the low-latitude plateau in large scale(UAV flight co.trol was popularized and applied to 15 527 hm 2 in 2018).The research results provided mature whole-process technical support for the normalization of the application of the UVA flight co.trol of major sugarcane pests and *** UAV co.trol technology for major sugarcane pests and diseases had the advantages of ultra-low pesticides applying dosage and high operating efficiency,and co.ld effectively solve the problems such as the difficulty in pesticides applying,labor shortage and low operating efficiency in the middle late growth stage of high stalk *** technology successfully opened up a simple,efficient and new way for the effective co.trol of major sugarcane pests and diseases,and practically accelerated the process of integrated co.trol and prevention of sugarcane pests and *** addition,this technology had an extremely significant effect on reducing the loss of sugarcane farmers and enterprises caused by the epidemic and outbreak of sugarcane pests and diseases,increasing

关键词： Low latitude plateau Sugarcane diseases and pests Unmanned aerial vehicle Prevention and co.trol technology

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Safety Assessment of Closed-Loop Level Crossing co.trol systems by Means of STAMP(systems-Theoretic Accident Model and Processes)

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Journal of Traffic and Transportation Engineering 2018年第5期6卷 241-254页

作者： Tetsuya TAKATA Akira ASANO Hideo NAKAMURA Kyosan Electric Mfg.co. LtdYokohama 230-0031Japan The University of Tokyo Chiba 277-8561Japan

There have been a large number of accidents at level crossings of railways and this has been co.sidered to be a significant issue to be solved for the realization of safe and stable railway transport.A co.ventional level crossing co.trol system is characterized by the use of two types of electronic train detectors;one detects a train approaching to a level crossing section and the other then detects the train having left the level *** co.trast,closed-loop level crossing co.trol systems in which level crossing co.trol equipment and train-borne equipment co.municate with each other have been advocated and are expected to serve as an effective solution to the abovementioned *** paper describes the following three types of closed-loop level crossing co.trol systems:decentralized level crossing co.trol system,fully-centralized co.prehensive level crossing co.trol system and fully-centralized individual level crossing co.trol *** paper then assesses the safety of these systems in co.parison to the co.ventional level crossing co.trol *** the purpose of the assessment of their safety,a new accident analysis model called STAMP(systems theoretic accident model and processes)that is suitable for software intensive systems is used to clarify the advantage of the proposed three types of level crossing co.trol systems in terms of safety.

关键词： Level crossing co.trol railway signaling closed loop co.trol method safety assessment STAMP

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交错式涡流杆的传热强化作用和阻力特性

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化工设备与管道 2017年第2期54卷 -页

作者：吴欣慰刘长军梁斌唐思扬岳海荣谢和平四川大学化学工程学院四川成都610207 四川大学CCUS与co.矿化利用研究中心四川成都610207

采用CFD数值计算方法,以水为工作介质,研究了涡流杆间距、杆长等结构和流动参数对强化管层流传热和阻力性能的影响规律。结果表明,内置交错涡流杆强化管可以使流体形成显著的径向涡流,雷诺数Re为300~1 800时,其努塞尔数和摩擦因子分别... 详细信息

采用CFD数值计算方法,以水为工作介质,研究了涡流杆间距、杆长等结构和流动参数对强化管层流传热和阻力性能的影响规律。结果表明,内置交错涡流杆强化管可以使流体形成显著的径向涡流,雷诺数Re为300~1 800时,其努塞尔数和摩擦因子分别为光滑圆管的1.28~5.11倍和2.71~9.81倍,综合传热性能评价因子η为0.95~2.82。减小涡流杆间距、增加杆长均能够提高强化管的综合传热性能。

关键词：层流 CFD 交错涡流杆传热强化

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基于事件触发的异构多智能体最优包含控制

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航空学报 2020年第S1期41卷 163-170页

作者：王东王泽华刘洋 GU Dongbing 王伟大连理工大学工业装备智能控制与优化教育部重点实验室大连116024 大连理工大学控制科学与工程学院大连116024 埃塞克斯大学计算机科学与电子工程学院克彻斯特CO43SQ

针对异构多智能体系统的输出包含控制问题,提出一种基于边的事件触发最优控制协议,保证所有跟随者的输出能进入到由领航者的输出所形成的凸包中。同时,使系统达到最优性能,最小化控制代价。考虑到不是所有的跟随者都可获得领航者的信息... 详细信息

针对异构多智能体系统的输出包含控制问题,提出一种基于边的事件触发最优控制协议,保证所有跟随者的输出能进入到由领航者的输出所形成的凸包中。同时,使系统达到最优性能,最小化控制代价。考虑到不是所有的跟随者都可获得领航者的信息,提出一种基于边的分布式事件触发观测器,估计领航者输出形成的凸包内点的轨迹。设计加权代价函数评价包含控制的性能,并将输出包含问题转化为最优状态反馈控制设计问题。利用贝尔曼方程和黎卡提方程,给出异构多智能体系统最优输出包含控制的参数设计。选择不同类型的机器人构成多智能体系统,验证算法的有效性。

关键词：多智能体系统最优包含控制事件触发控制贝尔曼方程分布式观测器

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