The geochemical elementary assemblage of stream sediments is similar to the primary elementary assemblage because the mechanical transportation as the main transportation way.
而水系沉积物地球化学异常，由于以机械搬运为主，其元素组合与原生组合相近。
The pipeline transportation is not only one of the five greatest transportation systems, but also the main way for gas transportation in our country.
管道运输是我国五大运输系统之一，是天然气最为主要的运输方式。
In this thesis, it is the main objective to find a convenient and low cost way to acquire dynamic, high-precision, real-time location information for the intelligent transportation system.
以便捷、低成本的方式为智能交通系统获取动态、实时的高精度位置信息，为本次研究的主要目标。
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