About Ji-Huan He
My new emails:
my old one email@example.com was expired.
I studied Construction Engineering in the middle 1980s in Xi’an University of Architecture & Technology, China, and received my master degree of mechanical engineering in 1990 from Shanghai University, China, my thesis was Reliability Analysis of Pneumatical Cylinders. Subsequently I worked as an engineer in two manufactories for about 3 years. In late 1993 I became a Ph.D. candidate in Shanghai University where I studied aerodynamics and calculus of variations. In my Ph.D. thesis (defended in 1997) I proposed a new method called the semi-inverse method to search for variational principles in fluids. At that time, the finite element method became popular in China, and there was not a universal approach to establishment of a variational formulation directly from the governing equations and boundary/initial conditions. Lagrange multiplier method is the most used method, but the method becomes invalid for some special cases (e.g. the multiplier is vanishing), the semi-inverse method was originally suggested to eliminate the demerit of the Lagrange multiplier method, and it has become a useful mathematical tool to the establishment of a variational formulation for a real-life problem.
After graduation, I focused myself on variational theory for smart material and fluid mechanics, and then I turned my interest into analytical methods for nonlinear equations, and suggested some new approximate analytical methods, e.g., the variational iteration method, the homotopy perturbation method, and the parameter-expansion method, which are now widely used to solve various nonlinear equations.
In 2002, I moved to Donghua University doing research work on nanotechnology. Our group devised some new devices for producing nanofibers, such as vibration-electrospinning and megnetio-electrospinning. Just few months ago, we mimicked the possible mechanism of spider-spinning, and suggested a new method called the bubble-electrospinning for producing nanofibers with high-throughput.
By the way, I am also interest in biology and high-energy physics, and published some papers on allometric scaling and E-infinity theory.
review article (8)
The Variational Iteration Method Which Should Be Followed
Nonlinear Science Letters A- Mathematics, Physics and Mechanics (2010)
This paper proposes three standard variational iteration algorithms for solving differential equations, integro-differential equations, fractional differential equations, fractal differential equations, ...
AN ELEMENTARY INTRODUCTION TO RECENTLY DEVELOPED ASYMPTOTIC METHODS AND NANOMECHANICS ...
International Journal of Modern Physics B (IJMPB) , 22( 21)(2008) Page: 3487 - 3578 (2008)
This review is an elementary introduction to the concepts of the recently developed asymptotic methods and new developments. Particular attention ...
Materials Science (2)
Tunable surface morphology of electrospun PMMA fiber using binary solvent
APPLIED SURFACE SCIENCE (2016)
Superhydrophobic-superoleophilic fibrous polymethyl methacrylate (PMMA) membranes were prepared by electrospinning technique. The membranes exhibited a high water contact angle up ...
Research highlights in this issue (Nonlinear Science Letters A Vol ...
Nonlinear Science Letters A (2017)
This issue focuses mainly on analytical methods for nonlinear differential equations and fractional differential equations. Homotopy perturbation method, Boubaker polynomials ...
Research highlights in this issue (Nonlinear Science Letters A, Vol ...
Nonlinear Science Letters A (2017)
This issue publishes nonlinear problems arising in micro-electro-mechanical systems, functionally graded materials, nonlinear waves, moving boundary problems, and four-body problems, ...
Maximal Thermo-geometric Parameter in a Nonlinear Heat Conduction Equation
BULLETIN OF THE MALAYSIAN MATHEMATICAL SCIENCES SOCIETY (2016)
A nonlinear heat conduction equation is studied, and the maximal thermo-geometric parameter in the equation is analytically determined, above which ...