Industrial robots are today essential components in the manufacturing industry where they are used to save costs, increase productivity and quality, and eliminate dangerous and laborious work. High demands on accuracy and speed of the robot motion require that the mathematical models, used in the motion control system, are accurate. The models are used to describe the complicated nonlinear rela...

A damage identification technique based on frequency response functions (FRF) sensitivities is presented. This technique leads to a set of linear equations, which is solved using an algorithm that constrains the solution to be physically admissible. Damage simulation and identification on a laminated rectangular plate is performed. The influence of the number of natural frequencies and mode sha...

In this paper, we present a new speech perceptual hashing authentication algorithm based on wavelet packet decomposition (WPD) for speech content authentication. Firstly, a wavelet packet coefficients matrix of wavelet reconstruction is generated from an original speech signal after high frequency pre-processing followed by wavelet packet decomposition. Secondly, the wavelet packet coefficients...

Purpose: Whole-heart MRA techniques typically target pre-determined motion states and address cardiac respiratory dynamics independently. We propose a novel fast reconstruction algorithm, applicable to ungated free-running sequences, that leverages inherent similarities in the acquired data avoid such physiological constraints. Theory Methods: The proposed SIMilarity-Based Angiography (SIMBA) m...

In this paper, an image-based method-non-uniform light field mapping is proposed which combines edge-based surface light field partition and non-uniform decomposition of light field matrixes for real-time rendering. Through this method view-dependent appearance of scenes with complex reflectance properties can be rendered in real-time. This method obtains surface light field by resampling the d...

Understanding the soil-water dynamics and maize evapotranspiration (ETc) under variable rate irrigation (VRI) fertigation (VRF) management with respect to soil spatial variability constitutes basis for developing effective water nitrogen strategies. This long-term research was designed quantify compare dynamics, including available (AW), ETc during vegetative reproductive growth periods of VRI,...

Metaheuristic algorithms have known vast development in recent years. And their applicability engineering projects is constantly growing; however, deferent exploration and exploitation techniques cause the problems to favor some over others. This paper studies damage identification steel plates using Frequency Response Function (FRF) indicator detect localize healthy damaged structure. The stud...

This study presents a free vibration analysis of asymmetric sandwich structures comparatively. Sandwich were manufactured by the hand-layup vacuum bagging method. Symmetric and analyzed experimentally to evaluate effect asymmetry on characteristic structures. Free was performed using VIBXPERT II under clamped-free boundary conditions. The frequency response function (FRF) is obtained from modal...

BACKGROUND Real-time PCR is the technique of choice for nucleic acid quantification. In the field of detection of genetically modified organisms (GMOs) quantification of biotech products may be required to fulfil legislative requirements. However, successful quantification depends crucially on the quality of the sample DNA analyzed. Methods for GMO detection are generally validated on certified...

For FRF based model updating procedures, the selection of updating frequencies and the choice of a damping approach are important factors to obtain reliable updating resuns. This paper discusses the selection of the updating frequencies and shows that damping approaches like proportional, structural or modal damping are not satisfactory for model updating purposes.