搜索结果: 1-15 共查到“知识库 农业数学”相关记录173条 . 查询时间(3.062 秒)
TITLE-“BRIDGING THE DIGITAL GAP AT VILLAGE LEVEL: LESSONS LEARNT FROM PONDICHERRY'S VILLAGE KNOWLEDGE CENTRE”
VKC Digital Divide WAP VHF Kiosks IRDC Hub GIS
2015/7/29
With widening gap in digital divide among urban and rural areas, it has become imperative to bring the people of
disadvantageous groups to the main streams of society and have similar accessibility ...
A SOUND APPROACH FOR RESOLVING THE FOREST PROPERTY PROBLEMS WITH DIGITAL PHOTOGRAMETRIC METHOD
Forestry Photogrammetry Image Digita Method
2015/7/29
The Turkey’s general cadastre works have not been completed as yet. Even some of the areas where cadastre has been finalised,
forest properties are still under social pressure and as such these area...
AN INTEGRATED GIS AND KNOWLEDGE-BASED DECISION SUPPORT SYSTEM IN ASSISTING FARM-LEVEL AGRONOMIC DECISION-MAKING
GIS Knowledge Representation Digital Agriculture Decision Support
2015/7/29
A main task in agriculture production is field management of water and fertilizer. Excessive fertilizer and water application not only
waste resource but also pollute the environment. The traditiona...
Dehydration kinetics of onion slices in osmotic and air convective drying process
onion drying mathematical models diffusivity osmotic dehydration
2014/9/22
The effect of different pre-treatments (i.e. osmotic dehydration in 10, 15 and 20°Brix NaCl solution and drying air temperature of 50, 60 and 70°C) on drying behaviour of onion slices were investigate...
Goose eggshell geometry
image analysis goose’s egg eggshell profile radius of curvature egg volume egg surface area
2014/9/22
The paper presents a new approach of the eggshell geometry determination using and analysing the egg digital image and edge detection techniques. The detected points on the eggshell contour were fitte...
Development and evaluation of full-vehicle vibration model of MF 285 tractor
step function simulation transmitted vibrations Matlab software
2014/9/22
The vibration transmitted to the tractor driver not only leads to the driver health problems, but also reduces the driver working efficiency. One of the methods utilized to reduce driver vibration is ...
检测出缸皮蛋蛋壳是否有裂纹是确保皮蛋质量的重要环节。腌制好的皮蛋蛋壳表面大量的灰褐色斑点和一些大块黑斑使得其蛋壳表面的裂纹不易检测。皮蛋表壳斑点和裂纹的微细结构不同，对偏振光的退偏程度也不一样，可以利用皮蛋表壳各点偏振度的差异来识别其裂纹。该文设计了皮蛋表壳偏振图像采集系统，基于皮蛋0、45°、90°、?45° 4个偏振角度的图像和斯托克斯公式获得皮蛋表壳裂纹的偏振度图像，对偏振图像进行阈值预处理...
Identification of Apple Scab and Powdery Mildew Resistance Genes in Czech Apple (Malus × domestica) Genetic Resources by PCR Molecular Markers
apple Czech genetic resources Malus domestica Podosphaera leucotricha powdery mildew
2014/2/25
The presence of genes for resistance to scab (Venturia inaequalis) and powdery mildew (Podosphaera leucotricha) was studied using molecular markers in a sample of 279 apple cultivars from the Czech co...
回归饱和设计值得商榷的问题
回归饱和设计 最小二乘法 D—优良性
2012/2/21
从理论和实践上论证了回归饱和设计不能用最小二乘法估计回归模型中的参数；同时也论证了回归饱和设计的试验方案，不能用D—优良性判断其优劣，回归饱和D—最优设计是不存在的。
针对测土配方施肥指标体系建立中遇到的技术问题，以内蒙古自治区海拉尔地区2007～2009三年油菜试验数据为例，对应用“3414”试验数据进行土壤养分分级、基于三元二次肥料效应模型建立施肥指标体系进行了研究，并就“3414”试验方案实施条件以及不同数学模型在肥料效应函数计算中的应用进行了探讨。提出了海拉尔地区油菜土壤有效磷的分级和施肥指标：当土壤有效磷低于7 mg/kg时，推荐施磷量为120 kg/...
MapGIS和AutoCAD各具特点，各有优势，已被广泛应用于土地开发整理领域。在土地开发整理规划设计中，灵活运用这2个软件可以准确提取数据信息、充分利用各种数据资源、提高规划设计效率并最终实现数据共享，这对不断提高土地整理技术以及保持耕地总量平衡有着重要意义。笔者从MapGIS与土地利用规划、AutoCAD与规划设计之间的联系入手，分析了实现两者数据共享所需解决的坐标转换和数据共享的问题，并以某...
基于因素法与指数和法的农用地分等对比实证研究
农用地分等 因素法 指数和法 对比
2012/2/16
为了分析因素法与土地评价中的指数和法对农用地进行分等的优缺点,确定较优的农用地分等方法,对陕西省户县农用地分别用因素法与指数和法进行分等的分等结果进行对比,分析分等单元个数及面积的关系。结果表明两种方法对户县农用地分等的结果中分等单元个数及面积大小分布高度一致,但指数和法更为简便,更适合进行农用地分等,为日后的农用地分等工作提供依据。
由于印迹聚合物薄膜表面具有孔洞结构而表面不平整，因此为测量其光学厚度建立了薄膜反射干涉谱（RIfS）的阶梯模型，编写了采用阻尼最小二乘法的全光谱拟合计算程序，通过对实验光谱数据的拟合处理后可以直接得到单层膜或双层膜的光学厚度。将印迹纳米微球与聚苯乙烯（PS）甲苯溶液混合，旋涂到载玻片及硅片上制备氯霉素（CAP）印迹膜作为RIfS检测系统的敏感介质层,建立了不同基底的印迹膜光学厚度变化与CAP样品浓...
Computing the cost of the agricultural products: A case study
Agriculture cost computation crops livestock farm expenses
2011/2/22
Agriculture constitutes a specific sector of the Romanian economy. It does not contribute significantly to the increase in the gross domestic product, however, it is expected to fulfil three important...
A mathematical programming approach to crop mix problem
Crop mix single-harvest linear programming
2011/2/22
Problems normally faced by farmers include what to plant, how much to plant and when to plant. In this study, a linear programming crop mix model for a finite-time planning horizon was proposed. Given...