Beijing Baidu Netcom Science Technology Co., Ltd

Beijing Didi Infinity Technology and Development Co., Ltd.

State Grid Corporation of China

China Electric Power Research Institute

Junjun Zhang

Yang Zhang

Ming Zhou

Xiaopei Hou

Wei Shan Dong

Yu Hu

Zhen Li

Xiufeng Han

Yi Zeng

Xiaolin Zhang

Juntao Tong

Youhan Chen

Yingjie Niu

Ziyan Sun

Yun Zhao

Jiajing Fu

Changjun Sheng

Mei Chen

Ke En

Le Ding

Ren Ren

Dan Ma

Wenya Liu

Fei Zheng

Xiulong Xia

Yuke Zhang

Jingsheng Huang

Zhilei Chen

Hongshui Lv

Xiaodi Qin

Zilong Zhao

A method for constructing a three-dimensional road network map is disclosed. The method includes: extracting a two-dimensional road based on a satellite remote sensing image; skeletonizing the two-dimensional road to obtain a two-dimensional road network map; and determining a height of each point in the two-dimensional road network map based on an elevation of three-dimensional point cloud data, to obtain the three-dimensional road network map.

Construction of three-dimensional road network map

Provided are a map data processing method and apparatus, and a storage medium, which relate to the field of data processing technology and, in particular, to artificial intelligence technology, for example, computer vision, map technology, and intelligent transportation. A specific implementation solution includes: processing landform coverage data according to a type of surface species coverage and a data processing rule associated with the type of surface species coverage to obtain a surface species coverage effect map; and generating a landform map according to the surface species coverage effect map and a reference map.

Map data processing method and apparatus, and storage medium

The present disclosure provides a landform map building method and apparatus, an electronic device and a readable storage medium, and relates to the field of image processing technologies. The method for building landform map includes: acquiring a to-be-processed image to obtain a grayscale image of the to-be-processed image; classifying pixels in the grayscale image according to grayscale values to obtain binary images corresponding to different landform categories; extracting image spot contours of image spots in the binary images, and taking the extracted image spot contours as vector graphs to obtain a vector graph set; merging, according to position information, the vector graphs corresponding to a same landform category in the vector graph set, and obtaining a first landform map according to merging results corresponding to different landform categories; and mapping, by using a preset landform type, the vector graphs corresponding to different landform categories in the first landform map, and taking a mapping result as a second landform map.

Landform map building method and apparatus, electronic device and readable storage medium

The present disclosure relates to a system and a method for electric vehicle charging. The system may perform the method to: receive a request for charging station recommendation from a client terminal; determine at least one charging station within a preset distance range of the client terminal; determine an evaluation for each of the at least one charging station based on one or more evaluation parameters; and transmitting, by the first computing device, the evaluation of the each of the at least one charging station and an identifier of the each of the at least one charging station to the client terminal.

Systems and methods for electric vehicle charging

The present invention provides a method for detecting the anti-island protection performance of an inverter. An RLC circuit is serially connected between the inverter and a grid connection switch, the resonant frequency of the RLC load is set as three different numerical values for enabling the same to present resistance, capacitance and inductance, and a time value from the disconnection of the grid connection switch to the operation stop of the inverter under detection is recorded after a fundamental current value of the grid connection switch is set to a different value each time; and weighted calculation is performed on the time value to obtain a test result and grade evaluation of the anti-island protection ability of the inverter. By adoption of the detection method provided by the present invention, the problem that the anti-island protection ability of the photovoltaic inverter is difficult to precisely evaluate is solved; the anti-island protection performance of the inverter is comprehensively and objectively reflected; and meanwhile the phenomenon that a part of inverters cannot correctly reflect the anti-island ability of the inverters with respect to characteristic load design is effectively avoided, a technical support is provided for the existing method for detecting the anti-island protection performance, and related standard systems in the field of detection of the anti-island protection performance are further enriched and perfected.

Method for detecting anti-island protection performance of inverter

Growing community of inventors

Beijing, China

Junjun Zhang