نتایج جستجو برای: best performance time period

تعداد نتایج: 3268910  

جمشید صالحی صدقیانی, , رامین جباری, , مقصود امیری, ,

Abstract The present study aims at determining a proper decision making model for investment. In this regard, the effective criteria for evaluating the performance of mutual funds are extracted through reviewing research literature. Afterwards, the importance of each criterion (sharp, trainer, Jensen, Sortino) will be assessed through using the Shannon entropy. The study sample includes eight ...

Journal: :ژورنال بین المللی پژوهش عملیاتی 0
b. datta

intellectual capital is most vital enabler of enterprises. managing intellectual capital effectively can greatly enhance the competitive advantages of any enterprises. this study focused on how the enterprises utilize intellectual capital, in order to strengthen the competitiveness of enterprises. this research established a novel assessment model to measure the performance of intellectual capi...

2001
Junji Kawata Yoshifumi Nishio Akio Ushida

ABSTRACT In this study, bifurcation and complex phenomena in synchronizing chaotic oscillators coupled by a lossless transmission line are investigated. The period-doubling bifurcation with varying the time delay is observed in our circuit model. Further the voltage distribution of transmission line is simulated in order to investigate whether the current flowing through the transmission line i...

Journal: :journal of physical & theoretical chemistry 2008
n. farahani h. aghaie

fe2+ ion-selective membrane sensor has been fabricated from polyvinyl chloride (pvc) matrixmembrane containing neutral carrier tetra phenyl porphyrin (tpp) ionophore. the addition ofsodium tetraphenylborate (natpb) and the plasticizer dbp has been found to substantiallyimprove the performance of the sensor. the best performance was obtained with the sensor havinga membrane of composition of tpp...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده زیست شناسی 1388

abstract chickpea is weak in competition of weeds that damages to it at between 40 t0 60 percent. kermanshah province is one of the most important region for chickpea fields in iran. for these reosons, weed management is necessary in this crop. in order to evaluate of herbicides and stubble control on broad leave weeds control in chickpea. experiment was conducted in agricultural research stat...

Journal: :پژوهش های علوم و صنایع غذایی ایران 0
aram bostan aram bostan aram bostan

in this study, mathematical modeling of hot air-drying of thin-layer papaya (carica papaya l.) slices with 5±1 mm thickness pretreated in osmotic solution (50% sucrose) was investigated. thin-layer drying was conducted under three different drying temperatures of 40, 50 and 60 °c at a constant air velocity of 0.9±0.1 m/s and absolute humidity of 0.6 ± 0.02 g of water/kg of dry air. it was found...

Journal: :Complex Systems 2012
René Ndoundam Serge Alain Ebélé

We study the sequences generated by neuronal recurrence equations of the form x(n) = 1[ ∑h j=1 ajx(n − j) − θ]. From a neuronal recurrence equation of memory size h which describes a cycle of length ρ(m)× lcm(p0, p1, . . . , p−1+ρ(m)), we construct a set of ρ(m) neuronal recurrence equations whose dynamics describe respectively the transient of length O(ρ(m)×lcm(p0, . . . , pd)) and the cycle o...

2006
DANIEL SMANIA

We give a new proof of the hyperbolicity of the fixed point for the period-doubling renormalization operator using the local dynamics near a semi-attractive fixed point (in a Banach space) and the theory of holomorphic motions. We also give a new proof of the exponential contraction of the Feigenbaum renormalization operator in the hybrid class of the period-doubling fixed point: such proof use...

Journal: :Neuroscience 2010
N C Berchtold N Castello C W Cotman

While it is well established that exercise can improve cognitive performance, it is unclear how long these benefits endure after exercise has ended. Accordingly, the effects of voluntary exercise on cognitive function and brain-derived neurotrophic factor (BDNF) protein levels, a major player in the mechanisms governing the dynamics of memory formation and storage, were assessed immediately aft...

Journal: :I. J. Bifurcation and Chaos 2003
Michael Small Dejin Yu Robert G. Harrison

We find evidence of a period doubling bifurcation and transition from pseudo-periodic chaos to a stable limit cycle during onset of ventricular fibrillation (VF) in humans. Novel radial basis modeling techniques are applied to time series of spontaneous VF to estimate time dependent changes in the dynamics. Furthermore, we show that the spectral power content may be used as a surrogate for the ...

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