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检索条件"任意字段=第四届国际计算机与计算技术在农业中的应用研讨会"

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Study on Relationship between Tobacco Canopy Spectra and LAI

Study on Relationship between Tobacco Canopy Spectra and LAI

引用

第四届国际计算机与计算技术在农业中的应用研讨会

作者： Hongbo Qiao Weng Mei Yafei Yang Wang Yong Jishuai Zhang Yu Hua College of information and management science Henan agricultural university Sanmenxia Branch of Henan Tobacco Company

N nutrition is one of the most important limitation factors for crop growth and *** and timely monitoring and detection of crop N nutrient conditions is necessary for improving the efficiency of N nutrition using and crop management,reducing environmental pollution caused by over nitrogen fertilizer *** this paper the canopy reflectance spectra during the whole growth period on tobacco field plots treated with different nitrogen levels were periodically and continually *** of tobacco of several important growth periods was meanwhile *** results showed that tobacco canopy spectral reflectance of different growing periods changed regularly with the increase of nitrogen fertilizer *** canopy spectral reflectance increased in 710～1000 nm,while decreased in 460～680 *** was high correlations between NDVI and *** research supply theoretical foundation for tobacco N management.

关键词： Tobacco spectra LAI

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Simulation and Design of Mixing Mechanism in Fertilizer Automated Proportioning Equipment Based on Pro/E and CFD

Simulation and Design of Mixing Mechanism in Fertilizer Auto...

引用

第四届国际计算机与计算技术在农业中的应用研讨会

作者： Liming Chen Liming Xu College of Engineering China Agricultural University

Precision agriculture is the developing trend of modem agriculture,and the rational utilization of fertilizer is one of the key technologies in the precision agriculture,which needs to fertilize variably according to the crop needs and soil fertility *** a fertilizer automated proportioning equipment is developed to Proportion the three fertilizers:Nitrogen fertilizer,Phosphorus fertilizer and Kalium *** fertilizer will take greater effect after mixing sufficiently,so this paper mainly researched the mixing *** simulation and analysis of the velocity field and flow field of the fertilizer for the two paddles worked,the spiral-type paddle and multiple- fan-type paddle,are conducted respectively using Pro/E(Pro/Engineer) and CFD(Computational Fluid Dynamics) fluid dynamics analysis *** simulation,the paddle models are meshed using the Gambit *** the multiple- fan-type paddle is determined to be the more suitable one through the FLUENT software.

关键词： Precision agriculture Fertilizer Proportioning Mixing mechanism Multiple-fan-type paddle CFD fluid dynamics analysis

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Analysis of the Poverty-Stricken Rural Areas' Demand for Rapid Dissemination of Agricultural Information——Taking Wanquan County in Hebei Province as an Example

Analysis of the Poverty-Stricken Rural Areas' Demand for Rap...

引用

第四届国际计算机与计算技术在农业中的应用研讨会

作者： Xiaoxia Shi Yongchang Wu Chinese Academy of Agricultural Sciences Institute of Agricultural Resources and Regional Planning Graduate School of Chinese Academy of Agricultural Sciences

The majority of rural population in China has limited access to agricultural information at *** County was chosen as the studied area,in where the research used questionnaire to survey the current situation of peasants' demands for agricultural information,as well as the information delivery approaches.A questionnaire was developed and data were collected from 200 peasant *** major content is focused on the demands for the information service of peasant households,as well as the supply mode of agricultural information *** survey shows the information dissemination is irregular and the channels of information acquisition are serious in poverty-stricken rural *** there are different types of peasants' demands for agricultural information,the utilization rate is *** the digital divide between urban and rural areas will be a major challenge for government in Wanquan *** the basis of analysis,the research designs a local characteristic industry platform for the characteristic agriculture.

关键词： Questionnaire to survey Agricultural information resources Information demand Information delivery approach Development and utilization

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Root Architecture Modeling and Visualization in Wheat

Root Architecture Modeling and Visualization in Wheat

引用

第四届国际计算机与计算技术在农业中的应用研讨会

作者： Liang Tang Feng Tan Haiyan Jiang Xiaojun Lei Weixing Cao Yan Zhu Jiangsu Key Laboratory for Information Agriculture Nanjing Agricultural University

This paper aims to develop a root morphological model in wheat(Triticum aestivum L.),and the realistic visualization of root growth under different soil conditions in *** on the topology of the wheat root system,historical literature and experimental data,a root morphological model in wheat was developed preliminarily using thermal time as a driving factor,including sub-models of root emergence,root growth rate,and root axis *** on 3D visualization technology,a three-dimensional visualization model of the root axis in wheat was developed by using the platform of VC++.net and OpenGL library,including sub-models of geometry,texture mapping,and light *** the established root morphological model and the visualization model,the three-dimensional visualization of a root system in wheat under different soil conditions was *** study lays a foundation for further development of a visualization system for the whole wheat plant.

关键词： Wheat Root Architecture Model Simulation Visualization

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Multi-agent Quality of Bee Products Traceability Model Based on Roles

Multi-agent Quality of Bee Products Traceability Model Based...

引用

第四届国际计算机与计算技术在农业中的应用研讨会

作者： Yue E YePing Zhu YongSheng Cao Research Institute of Agriculture Information Chinese Academy of Agricultural ScienceKey Laboratory of digital agricultural early warning technology of ministry of agricultural Institute of Crop Science Chinese Academy of Agricultural Science

Role is an important concept in research on how to develop method of Agent-Oriented *** this paper,To study the background is bee product quality traceability system based on Multi-Agent,base on bee product quality critical control point,and describes a role-based multi-level framework of the *** Agent get different roles,and it get a group of services related to the process of quality of bee products *** the same time,through the dynamic role change to realize the collaborative process between Agent ***-Agent system model based on roles provide new methods and ideas about the control of the quality and safety of bee products.

关键词： Role MAS Bee Produces Collaboration Traceability

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Research of the Measurement on Palmitic Acid in Edible Oils by Near-Infrared Spectroscopy

Research of the Measurement on Palmitic Acid in Edible Oils ...

引用

第四届国际计算机与计算技术在农业中的应用研讨会

作者： Hui Li Jingzhu Wu Cuiling Liu College of Computer & Information Engineering Beijing Technology and Business University

A method for determination of palmitic acid in edible oils by the near-infrared spectroscopy was addressed in this paper.56 samples were collected in the *** terms of concentration content gradient method,44 samples were selected for modeling set and 12 for testing *** paper described the utilization of PLS for establishing a quantitative analysis model for predicting the content of palmitic acid in edible oils by near-infrared *** result shows that the model has a high accuracy for predicting the palmitic acid content with vector normalization and first-derivative preprocessing spectra with its best main factorial number of *** determination coefficients(R2),root mean square error of cross validation(RMSECV),root mean square error of prediction(RMSEP) and average bias are 99.59,0.162,0.306 and 0.148,*** model used in the paper can be adopted for the measurement of palmitic acid in edible oils accurately.

关键词： Near-infrared Spectroscopy Palmitic Acid Edible Oils quantitative analysis

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Development and Application of Computer Assisted Breeding System in Rabbit Breeding Farm

Development and Application of Computer Assisted Breeding Sy...

引用

第四届国际计算机与计算技术在农业中的应用研讨会

作者： Xibo Qiao Hongchao Wu Suping Sun Mingyong Li Zhaopeng Wang Jingui Dong Xinzhong Fan College of Animal Science & Technology Shandong Agricultural University

In order to meet the requirement of national modern rabbit husbandry and breeding management,based on animal breeding theory and the computer application technology,the Modern Rabbit Management Software that can run on Windows9X/Me/NT/2000/XP was programmed with Visual FoxPro9.0,which could enhance veracity and efficiency of selection & breeding of *** software could perform the selection of rabbit,the request of breeding and the tasks of production management for different scale rabbit *** software show it's convenience to operation and efficiency to breeding management from the using in six rabbit farms,which had great auto-action to implement production management automatization of rabbit farms and improve the efficiency of breeding.

关键词： Rabbit breeding Software Management system VisualFoxPro90

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Study on Pretreatment Algorithm of Near Infrared Spectroscopy

Study on Pretreatment Algorithm of Near Infrared Spectroscop...

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第四届国际计算机与计算技术在农业中的应用研讨会

作者： Xiaoli Wang Guomin Zhou Agricultural Information Institute of CAAS

Pretreatment of near-infrared spectral data is the basis of feature extraction,quantitative and qualitative analysis and establishment of models,it plays a significant role in obtaining the data and get reliable *** purpose of the paper is compared the advantages and disadvantages of the S-G,derivative and multiple algorithm methods of spectral preprocessing through the example of apple leaves.S-G algorithm can smooth the data relatively better,but we must according to the specific circumstances of the case while chose the width of the window and the order of polynomial;Kernel smoothing is better than S-G in two-ends data processing,but its processing speed is slower than *** algorithm can get more stable reflectance,but it is sensitive to noise,so it need to be used with the smoothing *** scatter correction can be used effectively to eliminate the translation and offset of *** of above algorithms have been applied in the system of near infrared spectroscopy processing system of leaves and satisfactory result was obtained.

关键词： Near Infrared Spectroscopy Spectral pretreatment Smoothing algorithm Derivative algorithm Multiple scatter correction algorithms

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Optimal Sizing Design for Hybrid Renewable Energy Systems in Rural Areas

Optimal Sizing Design for Hybrid Renewable Energy Systems in...

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第四届国际计算机与计算技术在农业中的应用研讨会

作者： Yu Fu Jianhua Yang Tingting Zuo College of Information and Electrical Engineering China Agricultural University Tianjin Electric Power Corporation

Small-sized hybrid wind-hydro-solar power generation systems may be designed to solve the power supply problem in some rural *** design models are developed to design the hybrid generation systems including battery banks and to provide the optimum system *** is ensured that the annualized cost of the systems is minimized while satisfying the required loss of power supply probability.A genetic algorithm is used to find the optimum ***,four membership grades of the systems,such as the reliability,the economical efficiency,the complement and the environmental benefit,are created by a linearly-weighted fuzzy algorithm to search the *** optimal algorithms are applied to a practical *** optimal design of the project is gotten and analyzed,which shows that the complement and the environmental benefit are taken full advantage of,and the corresponding system cost is minimized with enough power supply reliability.

关键词： hybrid renewable energy system loss of power supply probability genetic algorithm linearly-weighted fuzzy algorithm

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Study on the Rainfall Interpolation Algorithm of Distributed Hydrological Model Based on RS

Study on the Rainfall Interpolation Algorithm of Distributed...

引用

第四届国际计算机与计算技术在农业中的应用研讨会

作者： Xiaoxia Yang Yong Liang Song Jia School of Information Science and Engineering Shandong Agricultural University

Distributed hydrological model can be divided into two parts,as runoff and the *** calculation is the basis of distributed hydrological model,its results will determine the accuracy of the simulation results *** is an important input of runoff calculation,thus its accuracy has special significance to runoff *** most small watershed,now mainly rely on rainfall stations to obtain rainfall *** this case,the most effective approach is base on space correlativity principle,use the interpolation algorithm to obtain distributed rainfall *** XueYe reservoir2000-2008 year of reality measures data as an example,we compared the apply condition of several kinds algorithm such as co-kriging interpolation,kriging interpolation,reverse-weighted interpolation,and so on,prove that co-kriging interpolation is most fit XueYe reservoir.

关键词： Distributed hydrological model Association Kriging interpolation Kriging interpolation Reverse-weighted interpolation

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