Southwest Jiaotong University

University of Electronic Science and Technology of China

Sichuan University

China Tobacco Sichuan Industrial Co., Ltd.

Sichuan Sanlian New Material Co., Ltd.

Kai Liu

Ping Wang

Rong Chen

Min Xue

Yipeng Liu

Ce Zhu

Yong Deng

Bin Xu

Yufeng Sun

Yiling Liu

Xiaomin Yang

Lin Jing

Jianxing Liu

Ziyang Hu

Kaiyun Wang

Rengang Zhang

Jingmang Xu

Kuan Dai

Han Qin

Shaoxuan Zhang

Bengang Yang

Tao Lv

Yi Bao

Xiang Fei

Jin Han

Zhou Xu

Jiayan Nie

Xuetong Wang

Donglin Han

Jin Ma

Hui Peng

Yonghua Wang

Jiang Wu

Hongbo Shu

Zijun Cao

Provided is a method of reconstructing and randomly generating three-dimensional profiles of railway ballast particles. The method focuses on two aspects of accurate characterization and random generation of the railway ballast profiles. The method specifically includes: first, obtaining a lot of railway ballast profile samples to form a railway ballast library, and describing the uncertainty of the railway ballasts as much as possible; introducing a spherical harmonic function method into the three-dimensional profile characterization of railway ballast particles in order to accurately reconstruct the railway ballast particle profiles; and finally, establishing a joint probability density function of a spherical harmonic function spectrum to randomly generate railway ballast particles.

Method of randomly generating three-dimensional profiles of railway ballast particles

The present invention relates to the technical field of maglev transportation, specifically revealing a method and apparatus for measuring magnetic field intensity in high-temperature superconducting maglev transportation systems. The method includes: Establishing the top surface of the permanent magnet guideway (PMG) as the reference datum for magnetic field intensity measurements; developing a multi-point chord measurement system with parameters including system sampling interval, system order, and chord measurement configuration; computing intermediate chord values; constructing an inversion model incorporating the least squares method and employing this model to derive the vertical displacement of the reference chord baseline; determining gap sensor locations and deploying an array of Hall effect sensors along the direction of magnetic field intensity measurement; adjusting the reference datum position; and calculating the magnetic field intensity distribution above the reference datum using interpolation techniques based on the Hall effect sensor array measurements.

Method and apparatus for measuring magnetic field intensity in high-temperature superconducting maglev transportation systems

A high-speed train derailment arresting system is provided, which includes multiple passive protection arresting devices arranged on both sides of a high-speed railway line. The passive protection arresting device includes a rigid support assembly fixed on a respective side of the high-speed railway line and a rotating protective barrel arranged on the support assembly. A structural design method for the high-speed train derailment arresting system is further provided.

High-speed train derailment arresting system and structural design method therefor

Provided are a signal source space sensing method and apparatus, and an active sensing system. The method includes: a controller controls a signal transmitter to transmit a first signal to an object to be tested; the controller controls a signal receiver to receive a second signal, which is obtained after the first signal is transmitted by the object; the controller determines a coordinate relationship between the spatial position of said object and a signal source space according to the first signal and the second signal, wherein the signal source space is a coordinate space where the first signal transmitted by the signal transmitter is located; and the controller maps the second signal back to the signal source space according to the coordinate relationship between the spatial position of the object and the signal source space, to obtain a signal source space signal so as to reconstruct a sensing signal.

Signal source space sensing method and apparatus, and active sensing system

A temporal domain rate distortion optimization based on video content characteristic and QP-&#x3bb; correction provides the temporal domain rate distortion optimization based on the video content characteristic and the QP-&#x3bb; correction for a new generation encoder AV1, wherein according to a previous temporal domain dependency relationship under an HEVC-RA coding structure, a feature of the new generation encoder AV1 and a video sequence feature, an aggregation distortion of a current coding unit and an affected future coding unit is estimated and ta propagation factor of the current coding unit in a temporal domain distortion propagation model is calculated by constructing a temporal domain distortion propagation chain, wherein a Lagrange multiplier is adjusted through a more accurate propagation factor to realize a temporal domain dependency rate distortion optimization, and a relationship of QP-&#x3bb; is re-corrected and an I frame is adjusted to achieve a better coding effect.

Temporal domain rate distortion optimization based on video content characteristic and QP-&#x3bb;correction

A smoke generation product and a manufacturing method therefor, which relate to the technical field of tobaccos. The smoke generation product comprises a filter tip base body, a second connecting component, and an aroma generation portion. The filter tip base body comprises a first connecting component, and comprises a cooling portion and a filtering portion that are sequentially disposed in a smoking direction. The filtering portion and the cooling portion are connected by means of the first connecting component. A filtering passage and a cooling passage are in mutual communication. The aroma generation portion is connected to the filter tip base body by means of the second connecting portion, and the aroma generation portion is configured to release smoke by means of heating and make the smoke enter the cooling passage.

Smoke generation product and manufacturing method therefor

Growing community of inventors

Chengdu, China

Kai Liu