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检索条件"作者=5. College of Information and Electrical Engineering, China Agricultural University, beijing 100083. China"

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Real-time Power Quality Monitoring and Analysis Platform of Rural Power Network Based on Virtual Instrument

Real-time Power Quality Monitoring and Analysis Platform of ...

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2009 9th International Conference on Electronic Measurement & Instruments（ICEMI’2009）

作者： Yong Yang Xiaofeng Wang Chunling Chen college of information and electrical engineering Shenyang agricultural {5. Shenyang Liaoning Province china

A new design proposal of real-time power quality monitoring and analysis platform based on virtual instruments technology is proposed that aims at the key issues that affecting the quality of rural power network. From steady-state to transient-state, this article discusses the typical algorithms of harmonic analysis, voltage deviation and unbalance in three-phase, voltage swells and dips, voltage fluctuation, transient oscillation and the theory of power quality disturbances detection based on Hilbert phase-shifting. Completing the software design of power quality monitoring and analysis platform based on NI （National Instruments）-LabVIEW, which including visual design algorithm of the monitoring and analysis, graphical display of the calculation, analysis and display of the results, auxiliary we also use the FLUKE standard power source. The actual results show that the test results of our platform are accurate, the interfaces are friendly and the performances are steady and practical.

关键词： Power quality Rural power network Steady and transient state Hilbert transform NI-LabVIEW

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Study and design of an agricultural SMS system based on a GSM modem

Study and design of an agricultural SMS system based on a GS...

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The First International Conference on Computers and Computing Technologies in Agriculture

作者： GANGHONG ZHANG~(1 2) WANLIN GAO~(1 *) XIU WANG~2 XINLAN JIANG~1 YANG PING~1 HONGQIANG YANG~1 1 college of information and electrical engineering china agricultural university No.17 Qinghua Dong Lu Haidian {5. 100083.china 2 National engineering Research Center for information Technology in Agriculture {5. 100097 china

＜正＞To allow agricultural information to be quickly and accurately transferred in the field,it is possible to utilise existing agricultural information resources through mobile phone messages transferred to *** paper describes an agricultural SMS system based on a GSM modem and its associated *** purpose of this study is to construct a short message service system that is capable of receiving and sending messages freely in rural areas. For this,we create a buffer queue able to receive and send short ***,we establish a separate data table able to communicate incoming and outgoing information to a higher agricultural information management *** this internet system,agricultural information is extracted;organised and communicated back to the farmer.

关键词： agricultural information ISMG GSM modem SMS

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ANALYSIS AND MONITORING FOR EPIDEMIC SYSTEM AS A BASIS FOR CUCUMBER DOWNY MILDEW WARNING IN GREENHOUSE

ANALYSIS AND MONITORING FOR EPIDEMIC SYSTEM AS A BASIS FOR C...

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第四届智能化农业信息技术国际学术会议

作者： Chunjiang Zhao~~(1 2*) Ming Li~(1 3) Xiao Han~(1 2) Zheng Zhang~(1 2) Yan’an Wang~4 1 National engineering Research Center for information Technology in Agriculture beijing 100097 PR china 2 Key Laboratory for information Technologies in Agriculture the Ministry of Agriculture beijing 100097 PR china 3 college of information and electrical engineering china agricultural university beijing {15.PR china 4 college of life science Shandong agricultural university Taian 271018 PR china

＜正＞Plant disease warning is a relative new concept and method system for integrated pest management. The basic of plant disease warning is epidemiology mechanistic and monitoring *** analysis of cucumber downy mildew epidemic has been proposed as the framework and criteria of early warning ***,a wide range of monitoring methods,including computer aids,for epidemic system provide foundation of establishing, operation and evaluation for early warning models. These results and approaches would prove useful in modeling and information system development for cucumber downy mildew warning.

关键词： Cucumber downy mildew greenhouse plant epidemiology monitoring epidemics waning

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An improved SIFT Algorithm for Feature Points matching of dairy cow images

An improved SIFT Algorithm for Feature Points matching of da...

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亚洲精细农业与计算机农业应用联合大会

作者： Lizhong Wang Vocational and Technical college Inner Mongolia agricultural university Hohhot Inner Mongolia china Shuoshi Ma college of Mechanical and {5. engineering Inner Mongolia agricultural university Hohhot Inner Mongolia china Heru Xue Zhenjie Hou college of Computer and information engineering Inner Mongolia agricultural university Hohhot Inner Mongolia china

The conformation is the main parameter in dairy cow appraisal;hence, it is necessary for the measuring and evaluating of dairy conformation to use machine vision technology in 3D reconstruction. The feature points detecting and matching are the pivotal steps in 3D reconstruction. The conventional SIFT feature points matching algorithm has shortcomings of too large search area and low efficiency, An improved SIFT feature points matching algorithm is proposed to reduce the search range from both row and column directions based on binocular vision principle. 2.7 times of in speed by the improved algorithm has been shown in the experiments compared with that of the conventional algorithm with the same matching precision.

关键词： diary cow conformation feature points detecting feature points matching SIFT algorithm

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Design and Realization of the Engine Condition Monitoring System Based on CAN Bus

Design and Realization of the Engine Condition Monitoring Sy...

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2010 The 3rd International Conference on Computational Intelligence and Industrial Application (PACIIA2010)

作者： Li-hui CHEN Ying-ji Liu YiSui Wei Zhou Research Institute of Highway Ministry of Transport Center of Transport beijing china YiSui Jian-Wei Ji Shenyang agricultural university college of {5. and electrical engineering Shenyang china

An engine condition monitoring system was established with the Freescale MC9S12DG128 chip which self-equipped with the CAN bus controller. This system collects such key parameters as oil pressure and rotation speed,as well as trouble code information and so on through designed CAN nodes,and transmits these parameters to the remote monitoring center through GPRS modules. It is proven by tests that this system is able to well accomplish each function.

关键词： CAN bus LCD GPRS DTC

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A MODEL TO PREDICT SHELF-LIFE LOSS OF HORTICULTURAL PRODUCE DURING DISTRIBUTION WITH FLUCTUATED TEMPERATURE AND VEHICLE VIBRATION

A MODEL TO PREDICT SHELF-LIFE LOSS OF HORTICULTURAL PRODUCE ...

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The Second IFIP International Conference on Computer and Computing Technologies in Agriculture (CCTA2008)

作者： Weiwei Gong1 Daoliang Li2 Xue Liu2 Jun Yue 2 3 Zetian Fu 1 * 1 college of Economics and Management china Agriculture university beijing P. R. china {5.2 college of information and electrical engineering china Agriculture university beijing P. R. china {5.3 college of Management Ludong university Yantai Shandong Province P. R. china 264025

Fresh fruits and vegetables has become a public concern from the food security aspect. And the prediction of shelf-life loss under the fluctuated temperature becomes one of the key problems in food supply chain operation. So this paper identifies the impact aspects of produce decaying during distribution. For the key temperature factor, the process is divided into three phases: sorting, traveling and door-opening. Based on time-temperature function, a model of shelf-life loss of horticultural produce during distribution is developed by evaluating respiration rate of vegetables and fruits considering both the environment fluctuated temperature and vehicle vibration during traveling. Taking eggplant as an example, the numerical experiment result demonstrates that the average cost for ambient distribution is 2.8 times of the insulation way.

关键词： shelf-life horticultural produce distribution respiration rate

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The Application of 1-Wire Technique in the Control System of Water-Saving Irrigation

The Application of 1-Wire Technique in the Control System of...

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国际农业工程大会

作者： Dongping Qian, Professor Xiaona Qi, Master Candidate college of Mechanical and electrical engineering, agricultural university of Hebei, Baoding 071001, {5. Shifeng Yang, Professor college of information and Automation engineering, Tianjin university of Science and Technology, Tianjin 30022, {5.

In a traditional control system of Water-saving irrigation, each sensor requires its own wiring and power supply. The sensor output must be signal conditional before transmission. And adding sensors to an existing system means more wires and electronics. Our system of Water-saving irrigation based on 1-Wire technique can resolve the above problems .1-Wire

关键词：

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Using hyperspectral indices to estimate foliar chlorophyll a concentrations of winter wheat under yellow rust stress

Using hyperspectral indices to estimate foliar chlorophyll a...

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The First International Conference on Computers and Computing Technologies in Agriculture

作者： LI JING~(1,2) JIANG JINBAO~1 CHEN YUNHAO~(1,2,*) WANG YUANYUAN~1 SU WEI~3 HUANG WENJIANG~4 1 college of Resources Science and Technology beijing Normal university No.19 Xinjiekouwai Street beijing 100875.china 2 State Key Laboratory of Earth Surface Processes and Resource Ecology beijing Normal university No.19 Xinjiekouwai Street beijing 100875.china 3 college of information & electrical engineering china agricultural university beijing {15.china 4 National engineering Research Center for information Technology in Agriculture beijing 100089,china

The canopy hyperspectral reflectance of winter wheat infected with yellow rust at different levels of severity were measured by an ASD FieldSpec Pro FR spectrometer in the field and the concentrations of chlorophyll a(Chl a) in the leaves corresponding to the spectra were determined by biochemical methods in the *** analyses were made between Chl a concentrations and canopy hyperspectral data of diseased wheat. Results show that foliar Chl a concentrations are strongly correlated with canopy spectrum in the visible region and the first-order derivative spectrum in blue edge,green edge,and red *** and nonlinear models for estimating Chl a concentrations of the diseased wheat were built based on several spectral *** indicate that SDr/SDg,in which SDr and SDg are the sums of the first derivative within red and green edges,outperformed the other indices in predicting Chl a *** relative estimation errors for Chl a for 12 unseen samples are 17.5..It is concluded that derivative spectra in red edge and green edge have strong prediction power for foliar Chl a concentrations of diseased winter *** hyperspectral remote sensing data to monitor crop disease and nutrition status is very promising.

关键词： chlorophyllα estimation models hyperspectral wheat yellow rust stress

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The LEC Method’s Application to Risk Assessment Management System in the Power Supply Enterprise

The LEC Method’s Application to Risk Assessment Management ...

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2011 International Conference on Management Science and Intelligent Control(ICMSIC 2011)

作者： Song Xiaoqiang Songping Zhou Dongsheng Yang Tao Corresponding author college of information & electrical engineering Shenyang agricultural {5. Shenyang P. R. china

Risk assessment management system in the power supply enterprise is mainly for manual operation of power production equipment, which may accidents and corresponding probability, is to improve the work safety accidents and the benefit of investment, the foresight to advanced control, finally reduce and eliminate accidents. Because of the LEC method’s characteristics-visualized and widely used in power supply enterprises, risk assessment system is easy to realize.

关键词： risk assessment system the LEC method

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INDOOR DYNAMIC LIGHTING CONTROL SYSTEM FOR A FULL-SCALE PRIVATE OFFICE

INDOOR DYNAMIC LIGHTING CONTROL SYSTEM FOR A FULL-SCALE PRIV...

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第24届中国控制与决策会议

作者： Yi-fei Chen 1 , Hui Li 2 , Huai Li 1 1. college of information & electrical engineering, china agricultural university, {5., 100083.. electrical Design Division, Sky Climber, LLC, Delaware, OH, USA

In this paper, a dynamic lighting control system for balancing light and shade in a full-scale private office is discussed. This system was developed to control the amount of indoor light by automatically adjusting the blinds and artificial lighting. Compared with previous work, the innovation of this system is the application of a fuzzy neural network and the feedback control of blinds turning. The fuzzy neural network is used to forecast the venetian blind turning angle. The angle feedback control is used to achieve the blind position with self-adaptive adjusting. The system was tested and verified in three different types of weather. The conclusion presented that the optimal angle of venetian blind operation and providing indoor visual comfort can be effectively controlled.

关键词： fuzzy neural network visual comfort angle of Venetian blind feedback control

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