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Analysis of Regional Distribution of Tree Species Using Multi-Seasonal Sentinel-1&2 Imagery within Google Earth Engine
multisensor tree species large areas cloud-computing machine learning
2023/12/6
Accurate information on tree species is in high demand for forestry management and further investigations on biodiversity and environmental monitoring. Over regional or large areas, distinguishing tre...
为探明大湄公河次区域植被净初级生产力(NPP)时空变化特征,基于GoogleEarthEngine(GEE)云计算平台,利用MOD17A3HGFNPP时序数据,采用线性趋势分析方法,分析了2001—2019年大湄公河次区域植被NPP的时空变化特征。结果显示:(1)2001—2019年间大湄公河次区域植被NPP总体较高,植被NPP年均值整体上变化趋势不显著,变化波动较大,且与年均温度有显著的负相关性...
Improving performance parameters of combustion engine for racing purposes
engine performance parameters turbocharger roller dynamometer
2014/9/22
Mechanical parts of stock engine have a performance reserve which could be utilized when the engine is used under the race conditions. Especially normal turbocharged engines have their performance par...
Research on agricultural search engine optimization
Search engine optimization (SEO) kernel principal component analysis (KPCA)
2011/1/11
Search engine optimization (SEO) has practical significance for promoting farmers income and agricultural efficiency in China.
生物质热解生物油/柴油乳化燃料的制备与试验（Preparation of Emulsified Fuel from Biomass Pyrolysis Derived Bio-oil and Diesel and Their Use in Engine）
生物油 柴油 乳化剂 乳化燃料
2009/9/25
制备了生物油/柴油乳化燃料并在柴油机台架上进行了试验。试验用生物油是在流化床反应器上对玉米秸秆粉进行热解试验获得的。将生物油与0号柴油以及适量的乳化剂混合，通过均质机均质，得到生物油/柴油乳化燃料。在ZS1110型柴油机台架上进行两种不同配比的生物油/柴油乳化燃料的发动机台架试验，得出了柴油机燃用生物油/柴油乳化燃料和纯柴油的负荷特性和排放特性曲线，并且对乳化燃料和纯柴油的油耗率和有效热效率进行了...
Fuzzy-Logic Search Engine for Soybean Shape Data
Fuzzy logic search Image database Leaf shape Plant shape Soybean
2009/7/21
A fuzzy-logic based search engine for a soybean shape database was developed on the WWW.It used to be difficult to evaluate crop shape characteristics quantitatively.Image analyzing technologies, how...
基于ArcGIS Engine的河道断面生成与数据获取
河道断面 自动生成 半自动生成 ArcGIS Engine
2009/6/30
河道断面分析是河床演变分析的基础。传统河床演变分析方法中的断面分析主要是针对固定断面来进行, 分析过程是根据固定
断面的实测地形资料, 绘制河道断面图, 处理数据的工作量较大, 且分析依赖断面实测资料的完整性。基于ArcGIS Engine 的河道断面生
成与数据获取解决了传统河床演变断面分析必须立足固定断面的局限。以河道地形测量数据为基础, 利用GIS 空间分析, 可根据需求
任意布设河道...
Effect of spent engine oil on soil catalase and dehydrogenase activities
catalase dehydrogenase soil engine oil
2008/11/20
The effect of spent engine oil on soil pH as well as activity of selected enzymes (catalase and dehydrogenase) was studied. The results indicate that spent engine oil caused a slight change in soil pH...