Heart failure (HF) has been a serious disease that threatens human's health. Now there are about 22.5million persons suffer from heart failure around the world. In addition, the incidence of heart failure in China...
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Heart failure (HF) has been a serious disease that threatens human's health. Now there are about 22.5million persons suffer from heart failure around the world. In addition, the incidence of heart failure in China has been upto 0.9%. The artificial heart has been widely attention and rapid development, due to the shortage of donor hearts. The study of control strategy of artificial heart is a key factor affecting the
Transverse vibration of an axially accelerating viscoelastic beam in summation parameter resonance is investigated. The viscoelastic material of beams was constituted by the standard linear solid model with the materi...
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Transverse vibration of an axially accelerating viscoelastic beam in summation parameter resonance is investigated. The viscoelastic material of beams was constituted by the standard linear solid model with the material time derivative involved. The method of multiple scales was applied to determine the steady-state response. In the present paper, numerical examples illustrate the asymptotic solution of steady-state
A lot of physical, chemical and mechanical processes exhibit anomalous behavior in their transport and relaxation properties under the influence of an external field. When the external field is time independent, the t...
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A lot of physical, chemical and mechanical processes exhibit anomalous behavior in their transport and relaxation properties under the influence of an external field. When the external field is time independent, the time Fractional Fokker-Planck equation obtained as the continuous time limit of Continuous time random walk with long-tailed waiting time distribution, has proven to be a powerful tool
The extraction of brain tissue from magnetic resonance (MR) head images, is an important image processing step for the analyses of neuroimage data. The authors have developed an accurate, fully automatic and fast brai...
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The extraction of brain tissue from magnetic resonance (MR) head images, is an important image processing step for the analyses of neuroimage data. The authors have developed an accurate, fully automatic and fast brain extraction method using an improved geometric active contour model. The method uses an improved geometric active contour model which combines the merits of traditional geometric active contour model (GAC) and a novel signed pressure force (SPF) function. The method defines the
Stochastic resonance (SR) has been extensively investigated both theoretically and experimentally in many fields, such as physical systems, neural systems, laser systems and biological systems [1]. In order to detect ...
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Stochastic resonance (SR) has been extensively investigated both theoretically and experimentally in many fields, such as physical systems, neural systems, laser systems and biological systems [1]. In order to detect SR, Sekimoto [2] proposed a formulation of stochastic energetics, which enables one to analyze energetics of both thermodynamical processes and non-equilibrium processes described by the Langevin
Local stiffness non-linearities exist often at the interface or junctions of assembled components in many complex mechanical systems. The entire physical system may often be under the influence of preloads or initial ...
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Local stiffness non-linearities exist often at the interface or junctions of assembled components in many complex mechanical systems. The entire physical system may often be under the influence of preloads or initial deformations, which may changes the static equilibrium point of the systems. For the case of the continuous symmetric stiffness non-linearity of the polynomial type, the initial deformation may
Restricted four-body problem is also a classic problem of celestial mechanics as well as the three-body case, wherein the infinitesimal mass can move freely under the gravitational influence of the other three primari...
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Restricted four-body problem is also a classic problem of celestial mechanics as well as the three-body case, wherein the infinitesimal mass can move freely under the gravitational influence of the other three primaries without affecting their motion. Due to the high degree of nonlinearity inherent to the problem, no complete analytic solution is available, even in the restricted three-body problem, let alone in the four-body case.
Double crises of chaotic oscillators in the presence of fuzzy uncertainty are studied by means of the fuzzy generalized cell mapping method. A fuzzy chaotic attractor is characterized by its global topology and member...
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Double crises of chaotic oscillators in the presence of fuzzy uncertainty are studied by means of the fuzzy generalized cell mapping method. A fuzzy chaotic attractor is characterized by its global topology and membership distribution. A fuzzy crisis implies a simultaneous sudden change both in the topology of the chaotic attractor and in its membership distribution. It happens when a fuzzy chaotic attractor collides with a regular or a chaotic saddle. By increasing a small constant bias in the forcing and
The conservation of energy principle is used to evaluate the large amplitude free vibration behaviors of an axially stressed clamped-clamped microbeam subjected to one-sided and two-sided symmetric electrostatic actua...
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The conservation of energy principle is used to evaluate the large amplitude free vibration behaviors of an axially stressed clamped-clamped microbeam subjected to one-sided and two-sided symmetric electrostatic actuations. With an assumed space mode, which satisfies the geometric boundary conditions of the beam, the final nonlinear governing equation is obtained. Based on the original the non-odd nonlinear oscillator, two new oscillators with odd nonlinearity are first addressed. Utilizing the analytical
This work explores the steady-state periodic transverse responses with their stabilities of axially accelerating viscoelastic strings. Longitudinally varying tension due to the axial acceleration is recognized in the ...
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This work explores the steady-state periodic transverse responses with their stabilities of axially accelerating viscoelastic strings. Longitudinally varying tension due to the axial acceleration is recognized in the modeling, while the tension was approximatively assumed to be longitudinally uniform in previous investigations. Exact internal resonances are highlighted in the analysis, while the resonances have been
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