The First Forty Years of a Technosol

来源 :Pedosphere | 被引量 : 0次 | 上传用户:cnsdxl
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Soil formation is often a very slow process that requires thousands and even millions of years. Human influence, occasionally on a par with the function of climate or geological forces, can accelerate the process and can be viewed as a distinct soil formi
其他文献
以轴向运动柔性梁为对象,采用Hamilton原理建立了轴向运动柔性梁的运动微分方程,采用复模态分析方法推导了两端简支梁和两端自由梁边界条件下的系统固有频率方程,采用Ritz法对系
为保证惯导系统高性能、低保障费用、安全可靠地完成导航任务,在对惯导系统性能影响因素分析的基础上,提出一种基于性能的惯导系统健康管理(INS-PHM)体系架构。它采用多层次
固体推进剂装药的表面裂纹严重影响着发动机的工作安全性。现阶段广泛使用的应力强度因子、J积分等断裂韧性指标不能直接应用于复合推进剂装药。为了得到HTPB推进剂Ⅰ型裂纹
利用计算机实现对场景目标的红外图像仿真,可以应用于军事、航空航天、农业、地质、气象等多个领域,具有理论研究价值和实用价值。本文概述了国内对计算机红外仿真技术的研究方法和研究现状,并展望了其未来的发展趋势。
摘 要:针对高超声速飞行器气动光学效应及其校正研究的技术需求,设计开发了一套气动光学效应仿真系统,用于对气动光学效应进行全过程仿真。系统基于“模块化”、“可扩展”和“可视化”的设计思路,采用“仿真平台+数据库+功能插件”的系统实现方案,在VisualStudio2008开发环境下,完成了气动光学效应仿真系统平台、数据库及相关功能插件的开发工作。系统支持用户根据自身需求自主编制仿真任务,并可在接口规
Soil microbial biomass and community structures are commonly used as indicators for soil quality and fertility. A investigation was performed to study the effec
Salt-affected soils are agricultural and environmental problems on a global scale. Plants suffer from saline stresses in these soils and show nitrogen (N) defic
Little attention has been paid to the role of soil organic matter (OM) in the formation of pedogenic carbonate in desert soils.The relationships among soil OM,s
A detailed landslide-susceptibility map was produced using a data-driven objective bivariate analysis method with datasets developed for a geographic informatio
The radial basis function (RBF) emerged as a variant of artificial neural network. Generalized regression neural network (GRNN) is one type of RBF, and its prin