Longhui Qin

Longhui Qin
Southeast University (China) | SEU · School of Mechanical Engineering

Doctor of Philosophy

About

25
Publications
3,494
Reads
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142
Citations
Introduction
I'm a postdoc scholar in the school of mechanical and aerospace engineering in University of California, Los Angeles. My current research interests include Human-machine interaction, Application of machine learning and neural networks, Algorithm development for mechanical problems, tactile sensing, flow measurement, etc. In collaboration with the members in our group, we aim to apply machine learning techniques and deep learning to solve some challenging problems in traditional mechanics.
Additional affiliations
January 2021 - present
Southeast University (China)
Position
  • Professor (Associate)
Description
  • Tactile Sensing; Intelligent Algorithms; Solid Mechanics; Structure Optimization; Flow Measurement
July 2018 - November 2020
University of California, Los Angeles
Position
  • PostDoc Position
March 2017 - June 2018
Nanyang Technological University
Position
  • Research Associate
Education
September 2011 - December 2016
Zhejiang University
Field of study
  • Mechatronics Engineering
August 2007 - July 2011
Xi'an Jiaotong University
Field of study
  • Machanical Engineering and Automation

Publications

Publications (25)
Article
The cover image is based on the Research Article A bottom‐up optimization method for inverse design of two‐dimensional clamped‐free elastic rods by Longhui Qin, Jianxiong Zhu, and Weicheng Huang., https://doi.org/10.1002/nme.6950.
Article
As a typical mechanical structure, ribbons are characterized with three distinctly different dimensions, i.e., length ≫ width ≫ thickness, which leads to their exclusive behaviors different from the one-dimensional (1D) case of slender rods and the two-dimensional (2D) case of thin plates. In this paper, we report a discrete differential geometry (...
Article
A discrete differential geometry (DDG)-based method is proposed to numerically study the natural frequencies of elastic rods and gridshells in their post-buckling configurations. A fully implicit numerical framework is developed based on Discrete Elastic Rods (DER) algorithm, in order to characterize the mechanical behaviors of an elastic gridshell...
Article
In this paper, the nonlinear mechanical response of elastic cable structures under mechanical load is studied based on the discrete catenary theory. A cable net is discretized into multiple nodes and edges in our numerical approach, which is followed by an analytical formulation of the elastic energy and the associated Hessian matrix to realize the...
Article
Full-text available
Rod‐like structures, such as DNA, climbing plants, and cables, pervade the nature and our daily life and also belong to a frequently encountered engineering problem, which usually assume a deformed shape based on the competition between elasticity (stretching, bending, twisting) and external forces (e.g. gravity). These structures often undergo geo...
Article
Full-text available
Spike trains (STs) induced by external stimuli are complex and challenging to decode the embedded spatiotemporal information. Although various methods have been developed to characterize STs, few applications have been reported in tactile discrimination applications. In this paper, a neurocomputing method based on reference spike train (RST) is pro...
Article
Motivated by the observations of snap-through phenomena in pre-stressed strips and curved shells, we numerically investigate the snapping of a pre-buckled hemispherical gridshell under apex load indentation. Our experimentally validated numerical framework on elastic gridshell simulation combines two components: (i) Discrete Elastic Rods method, fo...
Article
Full-text available
Flexible micro-pyramidal capacitive pressure sensors provide a high-level tunability, showing fascinating implications in various applications, such as advanced healthcare, protheses, and smart robots. In this work, analytical models for capacitive pressure sensors are reported based on micro-pyramidal electrodes and dielectrics, which are confirme...
Article
Based on the geometrically nonlinear Kirchhoff rod theory, the snap-through behaviors of an asymmetrically clamped ribbon under midpoint loadings are explored through a numerical approach. The pre-compressed elastic ribbon would experience supercritical pitchfork bifurcation and transform into multiple stable/unstable patterns when subjected to lat...
Article
This paper presents an enhancement energy harvesting in a cantilever system using bilateral multi-impact oscillators with nonlinear magnetic flux for a broad bandwidth frequency. Two nonlinear oscillators with low resonant frequency provided bilateral multi-impacts onto a cantilever beam in different positions. The nonlinear electromagnetic distrib...
Article
Full-text available
Elastic gridshell is a class of net-like structure formed by an ensemble of elastically deforming rods coupled through joints, such that the structure can cover large areas with low self-weight and allow for a variety of aesthetic configurations. Gridshells, also known as X-shells or Cosserat Nets, are a planar grid of elastic rods in its undeforme...
Article
Full-text available
An initially two-dimensional grid of elastic rods may be actuated into a three-dimensional shell-like structure, through buckling, when the end-points of the rods are constrained to a shrunk boundary. The shape of the 3D gridshell is a joint result of elasticity and geometric constraint. We develop a discrete differential geometry-based model of el...
Article
Full-text available
The original version of Fig. 10 is a repetition of Fig. 13 by mistake.
Article
As an important application of tactile sensing, the capability of texture discrimination is desired in many researches, such as artificial limbs, dexterous manipulation, and humanoid haptic mechanism, etc. In this research, a bio-inspired tactile sensor containing two perpendicular sensing films was developed and manually controlled to slide across...
Article
The ability of surface roughness discrimination is of great significance in the development of biomimetic robots and prosthetic limb as well as the research on humanoid tactile sensing. In our previous research, a bio-inspired tactile sensor was developed to discriminate different surface roughness. But its discrimination accuracy decreased greatly...
Conference Paper
Full-text available
As for ultrasonic gas flow meters, special attention should be paid to transducer installation effect as the flow disturbed by transducers will greatly affect the transit time determination and accordingly reduce metering accuracy. This paper presents a numerical method to analyze the disturbed effects based on Computational Fluid Dynamic (CFD), wh...

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Projects

Projects (2)
Archived project
Explore the sensing and signal processing mechanism of human finger.