Chinese Academy of Sciences

Beihang University

University of Science and Technology Beijing

Chinese Academy of Geological Sciences

Wen Chen

Bin Zhang

Zhi Li

Han Wang

Guoqiang Xue

Desheng Wang

Nannan Zhou

Renshu Yang

Min Gong

Wen Zhang

Chenxi Ding

Kangxin Lei

Chenglong Xiao

Mingjie Sun

Hongxu Huang

Pengfei Tian

Lijing Li

Jingbo Sun

Ruxin Ding

Qiuyi Du

Ze Shen

Shuangfeng Zhao

Shuai You

Kuijun Li

Songlin He

A large-scale denudation depth thematic mapping method, which includes: creating a rule for arranging field work point and field work route, a sampling rule, a field observation and recording rule and a mineral processing rule of a research area. Analyzing a target mineral selected at each field work point by using a thermochronology research method and inputting analysis data into a Low-T Thermo software to perform thermal evolution history modeling and denudation depth calculation, so as to obtain a denudation depth at each of the field work points. Drawing a denudation depth isopleth map of the research area according to the denudation depth at each of the field work points; and setting a large-scale standard regional geological map of the research area as a base map. Superimposing the base map and the denudation depth isopleth map to obtain a denudation depth map of the research area.

Large-scale denudation depth thematic mapping method

An efficient cut blasting method for medium-length holes in deep high-stress rock roadway is disclosed. The method may comprise steps of carrying out a crustal stress blasting test on the free face of the in-situ rock roadway to be excavated, and obtaining a distribution state of cracks under a synergistic action of crustal stress, explosion stress waves and clamping force of surrounding rock of a rock mass in the stratum where the in-situ rock roadway to be excavated is located; arranging a cutting hole net on the free face of the rock roadway to be excavated according to a distribution state of the cracks; performing cut blasting based on the cutting hole net.

Efficient cut blasting method for medium-length holes in deep high-stress rock roadway based on crustal stress induction effect

Disclosed is a method for extracting IP information in a TEM response of a grounded-wire source, comprising the following steps: 1) obtaining subsurface resistivity through inversion of a vertical magnetic field less influenced by an IP effect; 2) obtaining an electric field response not influenced by the IP effect based on forward modeling of the obtained underground electrical structure; 3) removing the influence of the IP effect on an observed response to obtain a pure IP response; and 4) inverting the obtained IP response to obtain IP information of polarizability, a frequency dependence, and a time constant. The method of the present invention provides a new idea for further extracting IP information in a TEM response.

Method for extracting IP information from grounded-wire transient electromagnetic response

Disclosed is a light intensity signal transmitting device based on a high-speed LED array. The light intensity signal transmitting device includes an LED array and a control board card; through a novel arrangement and driving mode, the LED array has a high-speed modulation characteristic and can transmit high-bit light intensity information at the switching speed of single-point LEDs; the control board card performs high-speed display by gating an I/O port of the LED array, and is used as a light intensity signal transmitting end to transmit a light signal. According to the light intensity signal transmitting device, on the premise that the switching rate of the LED array is ensured, multi-bit binary data transmission is realized, and the transmission rate is improved.

Light intensity signal transmitting device based on high-speed LED array

Growing community of inventors

Beijing, China

Wen Chen