A new method for unconstrained optimization in •" is presented. This method reduces the dimension of the problem in such a way that it can lead to an iterative approximate formula for the computation of (n 1) components of the optimum while its remaining component is computed separately using the final approximations of the other components. It converges quadratically to a local optimum and it ...

Ear biometric recognition is used in a lot of applications as person identification in criminal cases, investigation, and security purpose. Feature optimization stage has an important role for accuracy of correct recognition. Gabor filter have a problem of high dimension and high redundancy. Sampling filter is a problem of not reducing features optimum way. In the proposed Gabor feature extract...

\The skull seems broken as with some big weapon, but there's no weapon at all lying about, and the murderer would have found it awkward to carry it away, unless the weapon was to small to be noticed." \Perhaps the weapon was too big to be noticed," said the priest, with an odd little giggle. Gilder looked round at this wild remark, and rather sternly asked Brown what he meant. \Silly way of put...

Optimum reduction of the number of dimensions of the feature vector in biometric verification requires a figure of merit for the verification performance. We show that, under certain conditions, various figures of merit can be approximated by the same expression. We select one, the discrimination distance, as an objective function for dimension reduction. This new method for dimension reduction...

This paper presents a theoretical study of the behaviour of the Univariate Marginal Distribution Algorithm for continuous domains (UMDAc) in dimension n. To this end, the algorithm with tournament selection is modelled mathematically, assuming an infinite number of tournaments. The mathematical model is then used to study the algorithm’s behaviour in the minimization of linear functions L(x) = ...

an important section of range-doppler imaging algorithm in sar systems which needs large number of resources, memories and solution time, is fft on the azimuth dimension. in this paper, by decomposing the fft relation, and converting to smaller dimension ffts, implementation has been simplified. the proposed method, based on removing the extra phase factors reduces the resources, memories and s...

پس از اختراع خودرو، بشر بزودی به رابطه میان مقاومت هوا و حرکت اتومبیل پی برد. به مرور زمان با بهبود عملکرد خودروها از جهات مختلف و بالارفتن قیمت سوخت، بهبود آیرودینامیکی نیز به مسأله‌ای اساسی تبدیل شد. پژوهشگران دریافتند که توجه به آیرودینامیک نه تنها برای دستیابی به سرعت‌های بالاتر، بلکه به منظور کاهش مصرف سوخت و ایجاد پایداری مناسب در خودرو، امری ضروری است. به همین دلیل تاکنون تحقیقات زیادی د...

In this paper the performance of the CMA evolution strategy with rank-μ-update and weighted recombination is empirically investigated on eight multimodal test functions. In particular the effect of the population size λ on the performance is investigated. Increasing the population size remarkably improves the performance on six of the eight test functions. The optimal population size takes a wi...

Specific and sensitive operation of circuit breakers makes an individual position for them in power networks. Circuit breakers are at the central gravity of variations and execution operations. Therefore, an optimum operation is the main reason to investigate about new gases to be used in MV and HV circuit breakers instead of SF6. The arc process has enormous complexity because of hydrodynamic ...

The application of chaos theory in hydrology has been gaining considerable interest in recent years.Based on the chaos theory, the random seemingly series can be attributed to deterministic rules. Thedynamic structures of the seemingly complex processes, such as river flow variations, might be betterunderstood using nonlinear deterministic chaotic models than the stochastic ones. In this paper,...