In China, 9Ð5% of the landmass is karst terrain and of that 47,000 km2 is located in semiarid regions. In these regions the karst aquifers feed many large karst springs within basins of thousands of square kilometres. Spring discharges reflect the fluctuation of ground water level and variability of ground water storage in the basins. However, karst aquifers are highly heterogeneous and monitor...

In recent years, tissue engineering with mechanical stimulation has received considerable attention. order to manipulate samples, there is a need for electromechanical devices, such as constant-force actuators, integrated deflection measurement. this paper, we present an electrostatic actuator allowing the generation of constant force and simultaneous displacement measurement intended character...

background and aim: it has been several decades since the technology of frequency lowering (fl) has been proposed. however, primary research has revealed no benefits regarding the use of this technique. currently, new methods for fl and improvement of perception of speech and fricative sounds have led to the application of these methods by numerous companies to produce hearing aids. in this stu...

with A ∈ IRm×n, b ∈ IR, and x, c ∈ IR. We will assume that the number of columns n of matrix A is so large that it is impossible to generate and store the matrix A in memory. The revised simplex method in Chapter 7 of Chvátal can be appropriately modified to solve linear programs of the form (1); the resulting method is known as the column generation method where columns of A are generated as n...

This paper presents an application of evolutionary genetic techniques to the identification of internal parameters of a mass-spring physically-based animation model. A physical model of fabrics is first presented. It uses a mass-spring mesh and an inverse dynamics procedure in order to model the non-linear elasticity of fabrics. A method to identify the internal parameters of the model from geo...

In a context of increased competition, companies are looking to optimize all the components their systems. They use compression springs with constant pitch for linear force/length relationship. However, it appears that classic formula determining global load-length spring is not always accurate enough. It does consider effects spring's ends, which can induce non-linear behaviour at beginning an...

in this paper, the non-linear dynamic response of novel steel sandwich panel with hollow i-core subjected to blast loading was studied. special emphasis is placed on the evaluation of midpoint displacements and energy dissipation of the models. several parameters such as boundary conditions, strain rate, mesh dependency and asymmetrical loading are considered in this study. the material and geo...

a procedure is presented that synthesizes fractional crystallization separation processes to obtain pure solids from multi-component solutions. the method includes a procedure to generate a network flow model to identify alternative process designs for fractional crystallization. the main advantage of this systematic procedure with respect to other reported procedures is using non-equilibrium s...

The leaf spring is widely used in automobiles and one of the components of suspension system. It needs to have excellent fatigue life. As a general rule, the leaf spring must be regarded as a safety component as failure could lead to severe accidents. The purpose of this paper is to predict the fatigue life of semi-elliptical steel leaf spring along with analytical stress and deflection calcula...