نتایج جستجو برای ' Validation '

In this paper, heat transfer of single cylindrical particle affected by wall has been investigated numerically and experimentally for Reynolds number range 2000 to 6000. The heat transfer in two different orientations, axial and cross flow over the particle has been considered in simulation with MultiPhysics Software FEMLAB version 2.3. The heat and mass transfer analogy technique has been applied for validation of the simulation results. The coated particle with naphthalene was sublimated to ob...

One of the practical usages of data mining is design of intelligent medical diagnostic systems. The most important challenge in designing such systems is increasing detection accuracy; therefore this paper is proposed with the aim of increasing the detection accuracy. In this paper an intelligent diagnosis system is presented by using a hybrid approach of artificial immune system algorithm and velocity bounded boolean particle swarm optimization approach. In the proposed system, firstly, most in...

Discriminant function is a multivariate statistical method that has been used to determine correlation between every sample with one of known societies based on their litho geochemical analysis. In this study, geochemical features of elements that are probably related to mineralization of Au and Cu deposit in Tanurcheh area ,east of Iran, were evaluated using discriminant function model. In order to assessing of correct evaluation, discriminant function was utilized over Au element. Discriminant...

This research focused on developing a general health report that conveys an individual’s health readings in a clear, concise and explanatory manner and demonstrating the report’s usefulness. The research examined the need for such a report and focused the design on the determined need and communication through visual display. The designed “Individual Health Report (IHR)” was evaluated using data obtained from an online survey developed for this research. The analysis invo...

A novel statistical process control-based method for damage detection in cantilever-like structures is presented in this paper . It is based on time-domain data obtained from the free vibrations of the first mode of the structure, measured at only one point. The concept of signal length is introduced here as a feature for statistical process control. A statistical model consistent with extreme value theory is fitted to the operational data and used to establish control limits. A strategy based o...

An experimental setup which can simulate the rotor-to-stator rub in a rotor system is installed. A rub screw is used to simulate the condition of local rub–impact fault. Based on the theory of elastic collision and energy conservation, an Impact Energy Model (IEM) is proposed to evaluate the probability or severity of rub–impact fault. To prove this model, the paper conducts the experiment in two steps i.e. hammer test and rub–impact fault validation. The wave signal, spectrum ...

Feature-based validation techniques for dynamic system models could be unreliable for nonlinear, stochastic, and transient dynamic behavior, where the time series is usually non-stationary. This paper presents a wavelet spectral analysis approach to validate a computational model for a dynamic system. Continuous wavelet transform is performed on the time series data for both model prediction and experimental observation using a Morlet wavelet function. The wavelet cross-spectrum is calculated fo...

In a variety of applications, inertial sensors are used to estimate spatial parameters by double integrating over time their coordinate acceleration components. In human movement applications, the drift inherent to the accelerometer signals is often reduced by exploiting the cyclical nature of gait and under the hypothesis that the velocity of the sensor is zero at some point in stance. In this study, the validity of the latter hypothesis was investigated by determining the minimum velocity of p...

This paper compares geometry-based knee axes of rotation (transepicondylar axis and geometric center axis) and motion-based functional knee axes of rotation (fAoR). Two algorithms are evaluated to calculate fAoRs: Gamage and Lasenby's sphere fitting algorithm (GL) and Ehrig et al.'s axis transformation algorithm (SARA). Calculations are based on 3D motion data acquired during isokinetic dynamometry. AoRs are validated with the equivalent axis based on static MR-images. We quantified the ...

  The relationship between the vessel diameter (D) and fluid velocity (U) in arteries and flexible tubes has been recently characterized as linear in the absence of wave reflections. This relationship allowed for determining local wave speed (CDU) using the lnDU-loop method. Using CDU, it was possible to separate U and D waveforms into their forward and backward components. It was also possible to calculate wave intensity (dIDU), using D and U, from which the arrival time of reflected wave...