搜索结果: 46-60 共查到“工学 Agriculture”相关记录90条 . 查询时间(0.222 秒)
面向精细农业的土壤温度监测传感器节点设计（Smart Sensor Nodes for Wireless Soil Temperature Monitoring Systems in Precision Agriculture）
精细农业 土壤温度 传感器节点
2009/11/3
设计了一种能够监测土壤温度的无线智能传感器节点，硬件系统基于片上系统CC2430和DS18B20进行开发，软件部分包括温度采集和数据传输。实验表明，该节点可以实现土壤温度信息的采集和传输，且结构紧凑、工作稳定和功耗低。节点之间有效通信距离可达80m，误码率为1%左右。可以满足精细农业作业要求，同时也为无线传感器网络通信协议的进一步研究提供了实验平台。
面向农业移动管理的信息获取技术（GPS-based Information Collection Technology for Agriculture Mobile Management）
精细农业 移动终端 信息获取
2009/11/3
基于移动终端、嵌入式GIS和无线通讯等技术，设计了面向田间交互管理的农业移动管理系统技术框架，研究了农田信息无线采集与传输、基于位置的图像获取、GPS虚拟差分数据获取和无线数据传输等技术，开发了农业移动管理系统原型。移动终端具有GPS定位与导航、GPS照相、照片编辑与查看、专题图制作、属性信息查询、农田网格划分等功能。初步应用试验表明，该原型系统可应用于农田移动管理。
农业移动终端无线数据传输技术（Wireless Data Transmission Technology for Mobile Agriculture Terminal）
精细农业 移动终端 无线传输
2009/11/3
针对农业信息采集与传输的特点，基于TCP/IP协议研究了移动式农业信息智能服务系统的数据管理和传输方法，设计了移动终端与上位机之间的计算机网络应用层无线数据传输协议，研究了数据传输形式、传输格式和传输内容。初步应用表明，该协议适用于移动式农业信息智能服务系统，并具有一定的通用性和扩展性。应用层协议标准化有利于实现农业信息的共享。
Strategy for Developing the Fertilizer Sector in Bangladesh for Sustainable Agriculture
Urea TSP DAP Development strategy
2010/9/14
A strategic program for developing the fertilizer sector in Bangladesh for sustainable agriculture is presented in this paper. Based on the land utilization and likely cropping patterns in the future,...
BIOMASS GASIFICATION IN SMALL-SCALE UNITS FOR THE USE IN AGRICULTURE AND FORESTRY IN FR YUGOSLAVIA
BIOMASS GASIFICATION SMALL-SCALE UNITS AGRICULTURE FORESTRY FR YUGOSLAVIA
2009/10/13
This paper is the survey of the state-of-the art and prospects of biomass gasification in FR Yugoslavia. Combustion in small-scale units is the most common at present. Potentials of available biomass ...
Agriculture Feeds and Saves the World--Nuclear Techniques Used to Tackle Global Warming and Increase Crop Productivity
Agriculture Nuclear Techniques Global Warming Crop Productivity
2009/9/28
Experts say that healthy, properly managed agricultural land increases crop yield and can contribute significantly to the reduction of harmful greenhouse gases like carbon dioxide, methane and nitrous...
基于PSO与K-均值算法的农业超绿图像分割方法（Agriculture Extra-green Image Segmentation Based on Particle Swarm Optimization and K-means Clustering）
图像分割 微粒群算法 K均值算法
2009/9/11
为了解决K-均值算法对农业图像中常用的超绿特征2G—R—B图像分割效果不佳的缺点，提出一种基于微粒群与K均值算法的图像分割方法。先用K均值算法对图像进行快速分类，然后将分类结果作为其中一个微粒的结果，利用微粒群算法计算，最后用K-均值算法在新的分类基础上计算新的聚类中心，更新当前的位置，以得到最优的图像分割阈值。试验结果表明，改进算法对超绿特征2G—R—B图像能够准确分割目标，且对不同类型的农业超...
基于TMS320DM642的农业机器人视觉导航路径检测（Identifying the Navigation Route Based on TMS320DM642 for Agriculture Visual Robot）
机器人 自定位 视觉导航
2009/8/11
在农田非结构化自然环境下，通过机器视觉提取导航线的处理算法，利用透视投影变换得到摄像机相对于导航路径的偏移距离和偏移角，成功地在TMS320DM642系统上得到实现，并对程序进行了基于C语言的代码优化。试验结果表明，偏移角的最大误差为2°，横向偏移距离最大误差为5cm。
农林环境机器视觉导航路径生成算法及应用（Algorithms of Path Guidance Line Based on Computer Vision and Their Applications in Agriculture and Forestry Environment）
路径导航 农林环境 机器视觉
2009/5/22
提出两种自然环境中的路径导航线生成算法：对于矮小作物规则分布的农田场景，在标准Hough变换的基础上，预先检测共线点峰值的限定偏角阈值，以迅速检测关键信息；对于林地环境及类林地环境的高大作物农田场景，寻找树干与地面的交点，形成机器人行走的左右边界，再求两边交点的中值产生一列点簇。对该列点簇进行Hough变换检测直线作为导航线，或应用最小二乘法拟合左右边界，求其中线作为路径导航线。Matlab对比仿...
A Dedicated MRI for Food Science and Agriculture
small dedicated magnetic resonance imaging (MRI) proton-specified apparatus frozen margarine
2009/5/8
A dedicated magnetic resonance imaging (MRI) apparatus that is small, lightweight, and usable in an ordinary research room was devised for developmental research and quality estimation of foods and ag...
AGRICULTURE SECRETARY VILSACK NAMES JAY JENSEN AS DEPUTY UNDER SECRETARY FOR NATURAL RESOURCES AND ENVIRONMENT
agriculture natural resources enviroment
2009/4/27
WASHINGTON, April 22, 2009 – Agriculture Secretary Tom Vilsack today announced the appointment of Jay Jensen as USDA Deputy Under Secretary for Natural Resources and Environment (NRE). In this po...
Sampling Design for Global Scale Mapping and Monitoring of Agriculture
Global Agriculture Sampling Stratification Crop Monitoring MERIS
2016/4/8
In the changing global environment there is a need for an operational system for monitoring of world food crop production using satellite observations. It is useful in two primary missions – food secu...
Geomatics Analysis of the Impact of Predicted Sea-Level Rise on the Agriculture along the Coastal Zone of Andhra Pradesh
Climate Change Seal-level Rise Coastal Land use Agriculture Vulnerability
2016/4/7
Global warming induces steric as well as eustatic rise in sea-level, by thermal expansion and addition of ice-melt water, respectively. Although the IPCC (2007) estimated a maximum possible sea-level ...
The effect of tractor supply in Iran agriculture from a macro plan point of view
Iran tractor supply mechanisation
2014/2/26
The aim of this study was to investigate the effect of the tractor supply on agricultural yield from a macro plan perspective. The required information was obtained from the Institute of Agricultural ...
Economic Assessment of Environmental Pollution Damages Caused by Industry on Agriculture：The Case of Samsun Fertilizer（TÜGSAS）and Karadeniz Copper（KBI）Industries
Economic Assessment of Environmental Pollution Damages Industry on Agriculture Samsun Fertilizer（TÜ GSAS）
2009/1/16
In this study, to assess the environmental pollution damages to agriculture the case of TÜGSAS and KBI industries were chosen. For this aim, change-in-productivity, preventive/defensive expenditu...