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Cardiac single-slice time-area curves (TAC) depict the left ventricle function at multiple time points throughout cardiac cycle. The character and number of observed TAC phases depends on several factors related to heart condition and experimental procedure. The aim of this work was to assess piecewise linear regression modelling (PLR) as a tool for the TAC shape analysis leading to the curve sectioning...
The purpose of this paper is to discuss on the performance of parametric CAD module that has been developed for illustrating electric field distribution over high voltage (HV) systems having either a 2-dimensional or an axi-symmetric or an asymmetric configuration. The results of the electric field computation that are presented here are for an asymmetric gas insulated system (GIS) configuration....
Due to the differences in the thermal expansion coefficients of copper and silicon, a large thermal stress develops at the interface between a Cu-filled via and both the insulation layer and the surrounding silicon when the structure is subjected to temperature loading. In this paper four TSV geometries are considered in an effort to investigate the role of via geometry on stress relief. Thermo-mechanical...
Recently, micropump for liquid transportation is researched actively. However, the existing micropump is separated into flow part and pump part. The miniaturization of device is difficult, since the designing of flow part is too complex. Therefore, we developed tube type micropump which is the integration of flow part and pump part. This micropump consists of several ring type PZTs in equal intervals...
In this paper, an optimum design of an injection molding pantograph mechanism is discussed. This mechanism will be used to the miniature surface mount system in one room factory. First, a reduction of force acting at hinge caused by the movement of the mechanism is discussed. And the injection molding pantograph mechanism is synthesized based on the result of a numeric calculation of the algorithm...
Finite Element (FE) simulation is an effective approach to investigate the thermal stress status and the reliability trend when qualifying a new packaging material going through the reliability test. However, simulation of thermal stresses in gold wires was rarely reported in previous days due to the hardness in FE model building. This study performs 3D modeling to evaluate the thermal stresses in...
Dust particle is an electric cont??act failure causative factor that must be taken into account. In previous research, [1,2] the effect of dust particles on electric contacts was indicated and simplified model was established for the hazardous size range of hard dust particles entering into the contact interface. The electrical contact behaviors of several typical dusts with different compositions...
The springback is mainly an elastic deformation which occurs after sheet metal forming processes. This paper analyzed the mechanism of deep drawing springback of sheet metal forming, and the springback compensation was studied. Based on this, taking the stiffener parts of auto as an example, the paper analyzed the trend and distribution of springback and its distribution under different conditions...
As a healthful aerobic exercise, Yoga shall not be exclusive to women and men also needs Yoga for relieving pressure as too much pressure is put on men in the modern fast paced work and life and men have to undertake more duties and liabilities in this society. In this paper, research is conducted into Yoga's functions for men's health and its influence on men's bodies and minds, and through the research,...
Regulation of cell growth and proliferation has a fundamental role in tissue development, organogenesis, and disease progression. Conserved distribution of the number of sides of cells with a mean value of six was found in a variety of proliferating epithelia. Previous studies have shown that clones of proliferating cells bounded by quiescent cells have fewer sides than normal epithelia. However,...
In order to solve the gear reducer first selection design basis, the problem of insufficient, apply optimized design theory, write gear reducer first selection design mathematical model. Use level 2 incLined gear reducer as an example, write MATLAB and graphic interface, summarizes the total ratio under different conditions, power and reducer total of center distance change rule.
Stomata density is an important parameter that is used to analyze the environmental stress to plants, especially water stress [1–3]. The objective of this paper is to estimate leaves stomata density of Populus euphratica using remote sensing image processing technology, i.e., object-oriented classification, and to analyze ecological significance about stomata density change. The 18 samples were selected...
This paper addresses the problem of heterogeneous deformable model accuracy using the finite element methods (FEM). Classic FEM uses predefined shape functions for interpolation and does not account easily for regions of discontinuities. Extended finite element methods (XFEM) use enrichment functions to compensate for the change in an element degrees of freedom (DoFs) in deformable objects. The XFEM...
In this paper, the inner boundary conditions of a simply supported rectangular Mindlin plate with a finite-length Part-through crack is first obtained. The part-through crack on the plate surface having an arbitrary length and depth is assumed to be open, non-propagating and parallel to one side of the plate. Based on Mindlin plate theory and Hamilton theory, we got the governing equations of motion...
In this paper, we build two according 3D finite element models of the container crane by ANSYS respectively based on two common doorframe structures of compound type and single brace type. And then stress, deformation, mode shapes are analyzed and compared. The results present that stress, deformation and mode parameters of two models make little differences in the same load case. Therefore, adopting...
Meshless method based on radial basis function is a new numerical method. In this paper, the basic theory of meshless method is expounded, and the shape function's structure process of the radial basis function is given, which is used to solve elastic mechanics problems, and the numerical results fit well with its analytic solutions, which indicated that the numeric method has application prospect.
Vacuum glazing is a new energy-saving material; the damage of it is caused mainly by the tensile stress. Shape and parameters of support pillars are the key factors causing stress and deformation of glass. In this paper, stress distribution and parameters of vacuum glazing effect on stress and deformation have been researched according the Atmospheric effects using finite element method. The paper...
This paper introduces through the Ansys parametric design language (APDL) to establish finite element model containing surface semielliptical crack expansion of power station heat exchange tube. The type of finite element is used in this program is isoparametric degradation singular element, whice simulates crack stress singularities. And the crack front is token discrete. Based on this kind of finite...
Combining a kind of new adaptive technique with the radial point interpolation method (RPIM), it yields the adaptive RPIM meshless methods. We solved the classical cantilever beam problem using this method. Numerical results show the accuracy and efficiency of the present method.
The reliability and sensitivity of a tension rod which is subjected to the axial dynamic load and strength deterioration and has stochastic parameters is analyzed. The longitudinal stochastic response of the linear and continuous rod is given and the corresponding stochastic stress is formulated according to Hooke's law. The residual strength is modeled by a random variable and a non-stationary Gamma...
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