检索结果-南通市图书馆

Evaluation of Malaria Transmission and vector control Strategies in the Dry Season in the Cotonou V Health Zone, Benin, West Africa

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Entomology 2023年第3期11卷 156-171页

作者： Tokponnon Filémon Osse Razaki Zannou Ahissou Robert Franck Alapini Marlène Sare Dabou Zoulkifilou Houessinon Festus Gounou Yerima Idayath Sominahoun André Akogbeto Martin Centre de Recherche Entomologique de Cotonou Cotonou République du Bénin Ecole Polytechnique d’Abomey-Calavi Université d’Abomey-Calavi Abomey-Calavi Republique du Bénin Ministère de la Santé Cotonou Republique du Bénin Cercle d’Action pour un Développement Durable ONG Abomey-Calavi Republique du Bénin Ecole de Gestion et d’Exploitation des Systèmes d’Elevage Université Nationale d’Agriculture Kétou Republique du Bénin

The anarchic urbanization of certain African cities favors the multiplication of the malaria parasite. Thus, the urgent mobilization of African cities is essential to combat this health risk. It is, therefore, with the objective of contributing to the investigation of problem areas that the present study evaluates malaria transmission and vector control strategies in the Cotonou V health zone in particular. This is a cross-sectional study taking into account four neighborhoods, including Wologuèdè, Sainte Rita, Gbèdjromèdé and the area around Etoile Rouge. Two nocturnal captures on voluntary humans and the method of spray were carried out in the dry season from December 2021 to February 2022. On the captured Anopheles, the ELISA Circum-Sporozoite Protein test was performed to determine the infectivity and calculate some transmission parameters. Finally, we conducted a survey using the second stage sampling method with one step to ask selected households about their knowledge of vector control methods, their use and the physical integrity of LLINs. We collected 2386 culicidae of which the majority was Culex quinquefasciatus. After the ELISA test, the 29 Anopheles tested, showed no infectivity, i.e. an EIR of 0 pi/h/n. In addition, 99% of the populations in the Cotonou V area use LLINs to protect themselves. However, coils, door and window screens, aerosol sprays, skin and household repellents, and periodic indoor spraying were used. Finally, the majority of nets observed had T1 tears, but there were also T2, T3 and T4 nets (P-value = 0.0). This study confirms that malaria transmission during the dry season in the Cotonou V health zone is almost negligible but not non-existent. Also, populations are exposed to the nuisance of Culex quinquefasciatus mosquitoes continuously throughout the year.

关键词： Anopheles Transmission Urban Malaria Cotonou V Health Zone vector control

Design and Development of a vector control System of Induction Motor Based on Dual CPU for Electric Vehicle

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Beijing Institute of Technology 2003年第3期12卷 290-295页

作者：孙逢春翟丽张承宁彭连云 School of Mechanical and Vehicular Engineering Beijing Institute of Technology

A vector control system for electric vehicle (EV) induction motor drive system is designed and developed. Its hardware system based on dual CPU(microcomputer 80C196KC and DSP TMS320F2407) is implemented. The fundamental mathematics equations of induction motor in the general synchronously rotating reference frame ( M T frame) used for vector control are achieved by coordinate transformation. Rotor flux equation and torque equation are deduced. According to these equations, an induction motor mathematical model and rotor flux observer model are built separately. The rotor flux field oriented vector control method is implemented based on these models in system software, some of the simulation results with Matab/Simulink are given. The simulation results show that the vector control system for EV induction motor drive system has better static and dynamic performance, and the rotor flux field oriented vector control method was practically verified.

关键词： vector control induction motor electric vehicle

High Speed SRM Using vector control for Electric Vehicle

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

CES Transactions on Electrical Machines and Systems 2020年第1期4卷 61-68页

作者： Kohei Aiso Kan Akatsu Department of electrical engineering and bio science school of advanced science and engineeringWaseda UniversityTokyoJapan Yokohama National University

The high speed motor is effective to realize downsizing motor in an electric vehicle(EV).Switched Reluctance Motor(SRM)is possible to the high speed drive because the rotor structure has simple and ***,the vibration and the acoustic noise are large from the drive ***,the conventional complicated current excitation results in the difficulty of the torque controller *** overcome these problems,the vector control has been proposed for SRM ***,the vector control has not been applied to the SRM in the high speed *** this paper,the drive conditions such as switching frequency,bus voltage for driving the SRM in the high speed region are *** is shown that the proposed SRM can be driven by the vector control in the high speed region and can realize low vibration.

关键词： Switched reluctance motor vector control high speed drive.

vector control of the Single-Phase Inverter Based on the Extended and Virtual Circuits

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

CES Transactions on Electrical Machines and Systems 2018年第3期2卷 320-327页

作者： Tao Xu Ming Yang Naizhe Diao Xianrui Sun Suliang Wu Zhuangzhuang Shen Hongzhi Chen Chonghui Song Department of Information Science&Engineering Northeastern University

A vector control based on the extended equivalent circuit and virtual circuits is proposed for the single-phase *** the extended circuit,the other two phase voltages can be extended by the output voltage of the single-phase inverter so as to construct the voltage *** voltage outer-loop is to control the voltage vector in dq coordinate system,and the output voltage can track the target value without deviation in steady *** designing the virtual circuit,the voltage inner-loop can achieve approximate decoupling and improve the dynamic response under the changeable *** with the traditional dual closed-loop control,the proposed dual closed-loop control scheme only needs to detect and control the voltage without the *** not only can achieve good control effect,but also reduce the complexity of the ***,the simulation and experimental results show that the single-phase inverter has good static and dynamic characteristics regardless of stable load or changeable load.

关键词： Coordinate transformation dual closed-loop control extended circuit single-phase inverter vector control virtual circuit

Research on vector control Simulation Based on Field-Road Coupling

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Research on Vector Control Simulation Based on Field-Road Co...

作者： Xu-xuan CHEN Zhou ZENG School of Information Science and Engineering Wuhan University of Science and Technology School of Power and Mechanical Engineering Wuhan University

In vector control simulation,the MATLAB/Simulink model of the permanent magnet synchronous motor cannot fully simulate the inherent characteristics of the *** leads to problems such as reduced simulation accuracy and limited applicability of analysis *** order to solve these problems,this paper designs a joint simulation *** model is established based on the direct field-circuit coupling equation and the vector control *** can take into account both the analysis of the electromagnetic characteristics of the motor and the analysis of the control *** paper analyzes the speed,current and electromagnetic field distribution under different working conditions,and these simulation results show that the model is feasible.

关键词： Permanent magnet synchronous motor Field-circuit coupling vector control Co-simulation

Sensorless vector control of Single-Phase Induction Motor Drives

在线全文

cnki会议

学校读者我要写书评

暂无评论

Sensorless Vector Control of Single-Phase Induction Motor Dr...

2005国际电机与系统学术会议

作者： S.Vaez-Zadeh Sh.Reicy H. Advanced Motion System Lab. Dep. of Electrical and Computer EngineeringFaculty of EngineeringUniversity of TehranTehranIran IR Advanced Motion System Lab. Dep. of Electrical and Computer EngineeringFaculty of EngineeringUniversity of TehranTehranIran IR

＜正＞ SINGLE-PHASE Induction Motors （SPIMs） are being increasingly used in applications with variable speed requirement. A reliable motor speed signal is usually needed for speed control and advanced torque control in such applications. The use of a mechanical sensor for speed measurement is not a wise option because of its high cost relative to the motor *** this paper a speed estimation method is proposed for SPIMs using the rotor voltage vector defined in the complex domain. The estimated speed signal is then used in a novel sensorless vector control SPIM drive. Extensive simulation results validate the effectiveness of the proposed control system.

关键词： Index terms-Single-Phase Induction Motors vector control Speed estimation Sensorless control.

On Speed Sensorless vector control System for Induction Motor Based on Estimating Speed by Torque Current Differential

在线全文

cnki会议

学校读者我要写书评

暂无评论

On Speed Sensorless Vector Control System for Induction Moto...

第二十七届中国控制会议

作者： Liu Xu 1,Ruan Yi 1,Zhang Chaoyi 1,Sheng Huanqing 1,Yang Yong 1 1.Department of Automation,Shanghai University,Shanghai 200072,P.R.China

In this paper,a new method of speed estimation for sensorless vector control of induction motor is *** method is based on dynamic mathematical model of induction motor and torque current differential plays an important role in this *** estimated speed can be used as feedback signal for speed closed loop and to make up of speed sensorless vector control system for induction motor with current closed loop.A simulation model is established in *** obtained results are approved to be correct and *** system that uses this method has been developed and encouraging experiment results have also been obtained.

关键词： Speed estimation Induction motor Speed sensorless vector control Torque current differential

Research On Speed Sensorless vector control of Induction Motor Based On Torque Current Differential 25th

在线全文

cnki会议

学校读者我要写书评

暂无评论

Research On Speed Sensorless Vector Control of Induction Mot...

第25届中国控制与决策会议

作者： Qinghui Wu Lin Li Yanwei Pang Yang Wang Institute Of Engineering Bohai University

ISBN: (纸本)9781467355339

According to the rotor flux oriented dynamic mathematical model from Induction motor, the speed can be estimated with synchronous speed based on the torque current differential. Combing with slip formula, in this paper we constitute speed sensorless vector control system of Induction motor with current hysteresis loop control inverter. The simulation results show that the control scheme is valid and the speed estimation scheme is characterized by higher accuracy, faster dynamic response performance and higher steady precision.

关键词： Induction Motor vector control Torque Current Differential Speed Sensorless

Research on Speed Tracking of Asynchronous Motor Based on Fuzzy control and vector control

在线全文

cnki会议

学校读者我要写书评

暂无评论

Research on Speed Tracking of Asynchronous Motor Based on Fu...

第三十九届中国控制会议

作者： Qian Liu Zhuxin Zhang Dingxuan Zhao Lixin Wang Fanliang Meng Chenhua Liu School of Mechanical Engineering Yanshan University

To improve the speed tracking effect of the three-phase asynchronous motor under different load conditions, a fuzzy adaptive PID controller is designed, which is based on the fuzzy control algorithm and the vector control algorithm. The motor speed curve is designed to avoid the influence of load inertia by using the trig function acceleration and deceleration trajectory planning algorithm. The speed control system model of the three-phase asynchronous motor is built by MATLAB/Simulink. The conventional PID controller and fuzzy adaptive PID controller are used separately, and the speed tracking effects are compared with each other. The results show that the fuzzy adaptive PID controller can achieve a better speed tracking effect and have strong robustness. The asynchronous motor can get a better speed tracking effect according to the given speed curve.

关键词： Asynchronous motor Fuzzy adaptive PID control vector control Speed tracking