摘要：In this paper,the design of a GNSS-R data acquisition system is described,including the antenna,RF(radio frequency)front-end and FPGA(field programmable gate array)based logic circuit for data storage *** RF front-ends are connected with the RHCP(right-hand circular polarization)and LHCP(left-hand circular polarization)antenna to collect the direct and reflected signal *** the specifications and the circuit connections are given in *** are performed for statics at the seashore and dynamic scenario in the sea using *** results of the data analysis show that the proposed data acquisition system is suitable for GNSS-R primitive data collection.

摘要：Based on previous evaluating methods, a new method which combines GIS with Fussy Clustering algorithm is proposed and applied in evaluating the engineering geological environment of the research area of XuZHou City in this paper. By analyzing the characteristics and formation of engineering geological environment,the major problems are discussed, including stability of basement rock, sandy soil liquefaction and cultural *** to effecting factors of these problems, the stability of every engineering geological problem in the worked area is classified into different classes. Then, the Fussy Clustering method is used in assessing all conditions of engineering geological environment. Finally, the evaluation is fulfilled in the whole studied area. The calculating result shows the method is feasible.