Hyundai Motor Company

Kia Corporation

Yonsei University

Hae Won Yoon

Woo Young Lee

Hyun Soo Kim

Soo Min Lee

Dong Gu Kim

Il Seon Yoo

Se Young Park

Jang Hyeon Lee

Dae Sung Kwon

Hyun Sook Lee

Tae Ho Jeong

Sun Jung Kim

Jin Kyo Jeong

Dong Key Kim

A method for calculating and comparing evaluation indices for a signal system of an intersection includes: a traffic statistical information generation step of receiving image information in real time through cameras to derive traffic object information including traffic volume for each driving direction and traffic volume for each lane on a corresponding road at a preset first cycle, and to generate traffic statistical information including the traffic object information and intersection environment information; a digital twin generation step of inputting the traffic statistical information to a simulator, and implementing a traffic situation of the intersection as a graphical digital twin; and a composite congestion index derivation step of deriving a composite congestion index from each of an actual digital twin and a virtual digital twin, in which the evaluation indices are derived based on a congestion time of a predetermined number of vehicles at the corresponding intersection.

Method and system for calculating and comparing evaluation indices for signal system of intersection

Disclosed herein is a method for manufacturing a hydrogen sensor, the method comprising the steps of: disposing a thin film made of a transition metal or an alloy thereof on a surface of elastic substrate; applying a tensile force in a repetitive manner to the elastic substrate to form a nanocrack on the thin film disposed on the surface of the elastic substrate; and injecting hydrogen gas into the formed nanocrack and then removing the hydrogen gas to form a nanogap, wherein the tensile force in the step of forming a nanocrack is applied to an extent that the elastic substrate has a tensile strain of 25% to 100%.

Hydrogen sensor and hydrogen sensor manufacturing method

Growing community of inventors

Seoul, South Korea

Hae Won Yoon