Lanzhou Jiaotong University

Powerchina Northwest Engineering Corporation Limited

Institute of Earthquake Forecasting, Cea

Xiaoning Su

Haowen Yan

Jingzhong Li

Xiaomin Lu

Weifang Yang

Shuwen Yang

Zufeng Li

Zhixuan Miao

Wende Li

Pengbo Li

Haixing Shang

Qian Zhao

Fengshan Su

Wenjun Zhao

Shengjie Di

Mingbo Liu

Wenda Wang

Jiangang Feng

Zhao Zhang

Guojie Meng

Xiaorong Gao

Disclosed is a graph convolution auto-encoder based method for computing road network similarity. The method includes: creating a dual graph of a road network, and giving road network space feature information to nodes of the dual graph from three aspects of global, local and connection characteristics on the basis of a relation principle between an entire structure and parts of the structure, such that a quantitative expression of a road network graph structure is obtained; aggregating and updating node feature information and structure information of a road network graph by the graph convolution auto-encoder, and forming a deep understanding of the road network, such that a coded expression of node information of the road network is obtained; and mapping a complex high-dimensional feature space to an easy-to-measure low-dimensional feature space through an average pooling operation, so as to obtain a set of feature vectors, and computing the similarity.

Graph convolution auto-encoder based multi-scale method for computing road network similarity

A method for controlling engineering projection deformation includes: calculating, based on known coordinates of an engineering key region, a change rate of a length deformation function per kilometer in a first direction caused by a height difference of the engineering key region and a change rate of the length deformation function per kilometer in the first direction caused by a distance from a central meridian of a Gaussian projection zone of the engineering key region; solving a distance between a meridian where a center of the engineering key region is located and a new central meridian; solving an elevation of a compensation projection plane; and performing comprehensive projection deformation compensation based on the elevation of the compensation projection plane and the distance between the meridian where the center of the engineering key region is located and the new central meridian, so as to realize the controlling of engineering projection deformation.

Method and device for controlling engineering projection deformation

Disclosed is a three-dimensional deformation field modeling method fusing global navigation satellite system (GNSS)/synthetic aperture radar interferometry (InSAR) observation data. The three-dimensional deformation field modeling method includes: five parts of solving an InSAR line-of-sight velocity field, unifying a spatial reference datum of the GNSS data and the InSAR data, verifying precision of a result of the InSAR data, solving a three-dimensional deformation field having high precision based on a least square method, and analyzing and verifying a result. According to the method, the InSAR data is processed according to a high-precision time series method, a long-wavelength error of the InSAR data is corrected on the basis of a difference of two data spatial reference datums, and the accuracy of the result is ensured through verification of internal coincidence precision.

Three-dimensional deformation field modeling method fusing GNSS/InSAR observation data

Growing community of inventors

Lanzhou, China

Xiaoning Su