【摘 要】
：
Interaction between soil pedogenesis, subsurface water dynamics, climate, vegetation and human ingenuity in a desert environment has been found to result in a unique ecohydrological system with an ess
【出 处】
：
Journal of Arid Land
论文部分内容阅读
Interaction between soil pedogenesis, subsurface water dynamics, climate, vegetation and human ingenuity in a desert environment has been found to result in a unique ecohydrological system with an essentially three dimensional sedimentation structure i
其他文献
Consider the problems of frequency-invariant beampattern optimization and robustness in broadband beamforming.Firstly,a global optimization algorithm,which is based on phase compensation of the array
This paper addresses the JND(Just Noticeable Difference)change of auditory perception with synchronous visual stimuli.Through psychoacoustics experimentS,loudness JND,subjective duration JND and pitch
Three-way spacecraft Doppler tracking is currently widely used and it plays an important role in the control and navigation of deep space missions. Using the theory of three-way Doppler tracking, incl
With the fast increase in the resolution of astronomical images, the question of how to process and transfer such large images has become a key issue in astronomy. We propose a new real-time compressi
为了克服红外与可见光图像融合时噪声干扰及易产生伪影导致目标轮廓不鲜明、对比度低的缺点,提出一种基于深度模型分割的图像融合方法.首先,采用深度玻尔兹曼机学习红外与可见光的目标和背景轮廓先验,构建轮廓的深度分割模型,通过Split Bregman迭代算法获取最优能量分割后的红外与可见光图像轮廓;然后再使用非下采样轮廓波变换对源图像进行分解,并针对所分割的背景轮廓采用结构相似度的规则进行系数组合;最后进
衍射成像光谱仪探测到的高光谱数据需要进行计算与反演才可以得到成像光谱数据,本文对衍射成像光谱仪的成像过程及数据误差产生的原理从空间维和光谱维两方面进行了分析,并针对其光谱重构过程中系统点扩散函数标准差较大时重构结果清晰度较低、存在振铃等问题,提出了基于改进维纳逆滤波的光谱数据重构算法,该方法在分析衍射成像光谱仪数据特点与误差的基础上,将每一次维纳逆滤波的重构结果视为新的模糊图像,利用成像过程及维纳
采用水分控制试验,对干旱、半干旱退化荒漠草原治理过程中,土壤种子库对不同日降雨量和不同年降雨量的响应分别进行了研究。结果表明:不同日降雨量对激发土壤种子库物种组成和种子萌发总数均存在显著差异;不同植物种子对自身种子萌发所需水分不同。有的植物仅需很少水分即可萌发,有的植物需要很多的水分才可萌发,还有的植物种子可萌发范围较广;不同年降雨量对激发研究区内土壤种子库物种组成差异不显著,而对激发土壤种子库内
Stomatal behavior is a central topic of plant ecophysiological research under global environmental change. However, the physiological mechanism controlling the response of stomata to vapor pressure de
2014年8月13日,Nature在线发表题为《2014年伊基克地震后,智利仍存在发生大型逆冲断层地震的可能》(Continuing Megathrust Earthquake Potential in Chile after the 2014 Iquique Earthquake)文章认为,2014年4月1日发生在智利伊基克(Iquique)的8.2级强震并非此前科学家所预期的由地震空区效应所引
行为识别是图像处理的一个热点问题。一些研究表明在监督学习的框架下,通过提取时空兴趣点(Spatial-temporal interest points)能较好地识别人体的行为。由于兴趣点中包含与人体行为无关的噪声点,为了改进兴趣点的提取,提出了一种基于人体骨架的改进方法。该方法通过粒子滤波(Particle filter)算法改进人体骨架的精度,而改进后的人体骨架,能得到更有效的兴趣点。通过在"W