We analyze the post-fit residuals of one-way Doppler tracking data from the Mars Express(MEX) spacecraft to test possible violations of local Lorentz invariance(LLI) and local position invariance(LPI)
对理想情况和非理想情况下的解相关曲线的形态特性作了理论上的推导和讨论.推导了标准的斑点解相关曲线呈高斯曲线形态的理论依据和假设简化前提,讨论了当散射回波中存在相干散射成分时,对解相关规律产生的影响,此时解相关率下降变缓,相关长度也会相应地延长.基于以上理论基础以及散射回波各向同性的特点,本文通过计算斑块的层内横向解相关曲线来预测其所在位置的层间解相关规律,用于估算相邻两帧超声图像间的距离,以实现距
The Xiaojiang fault is a major active left-lateral fault along the southeastern margin of the Tibetan Plateau.The largest historical earthquake in Yunnan Province, with a magnitude 8 and a mean coseis
The strong motion of a small long and narrow basin caused by a moderate scenario earthquake is simulated by using the spectral-element method and the parallel computing technique.A total of five diffe
The Wenchuan earthquake has altered the crustal motion characteristics in the eastern margin of the Tibetan Plateau and adjacent regions.Using discontinuous GPS survey data for 2008–2012, the velocity
Soil salinity and ground surface morphology in the Lower Cheliff plain(Algeria) can directly or indirectly impact the stability of environments. Soil salinization in this area is a major pedological p
Soil carbon(C) and nitrogen(N) play a crucial role in determining the soil and environmental quality. In this study, we investigated the effects of 26 years(from 1984 to 2010) of farmland management o
Variations in soil organic matter accumulation across an elevation can be used to explain the control of substrate supply and variability on soil metabolic activity. We investigated geographic changes
Soil magnetic characteristics are correlated with soil p H and organic matter content. Analyzing soil magnetic characteristics, organic matter content and p H can indirectly evaluate soil pollution ca
2015年第1期《腐植酸》杂志卷首语栏目刊发了曾宪成理事长题写的64枚"四方弘印",本期"乌金"采风栏目将64枚"四方弘印"的内涵作简要解读。