【摘 要】
：
There is a need for determinations of soil organic carbon (SOC) and inorganic carbon (SIC) due to increasing interest in soil carbon sequestration. Two sets of soil samples were collected separately f
论文部分内容阅读
There is a need for determinations of soil organic carbon (SOC) and inorganic carbon (SIC) due to increasing interest in soil carbon sequestration. Two sets of soil samples were collected separately from the Yanqi Basin of northwest China to evaluate l
其他文献
以安装于公车内顶棚的单目摄像为研究对象,首先结合CENTRIST(census transform histogram)及LBP(local binary patterns)特征描述子对输入图像进行快速人头检测,然后结合视频流中包含的目标运动信息、被检测对象的外观信息、以及上车时间先验信息等来得到准确的人头数目。通过在现实场景下采集的真实公车视频流数据上的实验结果表明,该方法以接近实时的速度工作,
In order to enhance the contrast of the fused image and reduce the loss of fine details in the process of image fusion,a novel fusion algorithm of infrared and visible images is proposed.First of all,
根据连铸坯表面图像的特点,提出了一种基于Contourlet变换的连铸坯表面缺陷识别方法.通过Contourlet变换将样本图像分解成不同尺度和方向的子带,提取子带的Contourlet系数特征,并结合样本图像的纹理特征,得到一个高维的特征向量.利用监督核保局投影算法对高维特征向量进行降维,将降维后的低维特征向量输入支持向量机,对连铸坯表面图像进行分类识别.对现场采集到的裂纹、氧化铁皮、光照不均和
(Continued)Extended Mission Phase During the six-month design life,Chang’e 2 successfully accomplished the planned engineering demonstration and scientific exploration missions.Thanks to the launch ze
At 00:06 Beijing Time on May2,2013,ChinaSat-11,the 10th DFH-4 based communications satellite,was successfully launched,and later operations maintained it exactly in its predetermined orbit location.Mo
2013年8月4日,日本从种子岛航天中心利用H-ⅡB火箭发射第四艘H-II转移飞行器(HTV-4)前国际空间站。HTV-4货运飞船全长约为10m,直径为4.4m,质量为16×103kg。由密封舱、非密封舱、表舱和发动机舱4个部分组成,船上物品包括:食物、卫生用品、站内外备件以及科学实验用品。20138月9日HTV-4货运飞船与空间站对接,停靠在"和谐"号节点舱朝向地球的一侧。
针对原NAS-RIF算法敏感于噪声且支撑域为矩形等不足,提出了一种改进方案.通过引入高阶统计量去噪,解决了NAS-RIF算法敏感于噪声的特性;利用图像分割技术进行图像支撑域的自估计,改变了NAS-RIF算法中支撑域必须是矩形的不利限制.仿真结果表明改进的NAS-RIF算法具有很好的恢复效果.
Potassium (K) release characteristics in soil play a significant role in supplying available K. Information on K-release characteristics in soils of central Iran is limited. The objectives of this stu
In rain-fed semi-arid agroecosystems, continuous conventional tillage can cause serious problems in soil quality and crop production, whereas rotational tillage (no-tillage and subsoiling) could decre
采用Le Bissonnais(LB)法,通过室内人工模拟酸雨淋溶赤红壤试验,研究了酸雨对土壤团聚体的大小分布及其稳定性的影响与团聚体破碎的主导作用机制。在快速湿润处理下,小于0.25 mm团聚体的含量随淋溶酸雨的pH值降低而显著增多,大粒径团聚体含量则相应减少,而慢速湿润和湿润后震荡处理则没有表现出明显的规律性。团聚体大小分布和平均重量直径(MWD)的结果表明,酸雨淋溶能加强团聚体的消散机制,对