نتایج جستجو برای: مدل dde

تعداد نتایج: 121528  

Journal: :EURASIP J. Wireless Comm. and Networking 2013
Shu-Han Liao Chien-Hung Chen Chien-Ching Chiu Min-Hui Ho Tadeusz A. Wysocki Beata J. Wysocki

Using the impulse responses of these multipath channels, the bit error rate (BER) performance for binary pulse amplitude modulation impulse radio ultra-wideband communication system is calculated. The optimization location of receiving antenna is investigated by dynamic differential evolution (DDE) and genetic algorithm (GA) to minimize the outage probability. Numerical results show that the pe...

1992
C A H Paul C T H Baker C T H Baker

In this paper we are concerned with the development of an explicit Runge-Kutta scheme for the numerical solution of delay diierential equations (DDEs) where one or more delay lies in the current Runge-Kutta interval. The scheme presented is also applicable to the numerical solution of Volterra functional equations (VFEs), although the theory is not covered in this paper. We also derive the stab...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2003
Panayotis G Kevrekidis Niurka R Quintero

The aim of this work is to propose a method for testing the integrability of a model partial differential (PDE) and/or differential difference equation (DDE), by examining it in a finite but large domain. For monoparametric families of PDE/DDE's, that are known to possess isolated integrable points, we find that very special features occur in the finite domain remnant of the continuous ("phonon...

2004
Bo Hong Demyn Plantenberg Darrell D. E. Long Miriam Sivan-Zimet

Duplicate Data Elimination (DDE) is our method for identifying and coalescing identical data blocks in Storage Tank, a SAN file system. On-line file systems pose a unique set of performance and implementation challenges for this feature. Existing techniques, which are used to improve both storage and network utilization, do not satisfy these constraints. Our design employs a combination of cont...

2011
Cristiana Guerranti Michela Palmieri Michela Mariottini Silvano Ettore Focardi

Persistent organic pollutants (POPs) such as HCB, p,p'-DDE, and PCBs were measured in Italian breast milk. This work is part of a study on human milk, adipose tissues, and food carried out in the same area over the last 20 years. The results showed the prevalence of p,p'-DDE and PCBs over HCB. Comparison of our results with those of previous studies carried out in the same area showed that conc...

2010
Andreas Otto Günter Radons

To understand the dynamics of systems with fluctuations in the retarded argument, the Lyapunov spectra of a scalar, linear delay differential equation (DDE) are studied. Depending on the structure of the deviated argument some Lyapunov exponents can be equal to minus infinity, which indicate the difference between the dimension of the state space and the asymptotic solution space. In order to v...

2012
E. Kaplova K. Tomankova H. Kolarova P. Krejci

J. O. Turner was the first who described the developmental defect of permanent tooth caused by periapical inflammation of temporary predecessor. This disorder is most common in the upper front teeth and premolars. These disorders are collectively called developmental defects of enamel (DDE). They are visible deviations from the normal translucent enamel resulting from enamel organ dysfunction. ...

Journal: :Environmental pollution 2011
M A Mora C Baxter J L Sericano A B Montoya J C Gallardo J R Rodríguez-Salazar

Eggs from aplomado falcons (Falco femoralis septentrionalis) nesting in Chihuahua and Veracruz, Mexico, were analyzed for organochlorine pesticides, PCBs, and PBDEs. p,p'-DDE was the only organochlorine found in all eggs at concentrations ranging from 0.13 to 7.85 μg/g wet weight. PCBs ranged from 0.04 to 2.80 μg/g wet weight and PBDEs from 62 to 798 ng/g lipid weight. DDE concentrations in egg...

2012
Eva Govarts Mark Nieuwenhuijsen Greet Schoeters Ferran Ballester Karolien Bloemen Michiel de Boer Cécile Chevrier Merete Eggesbø Mònica Guxens Ursula Krämer Juliette Legler David Martínez Lubica Palkovicova Evridiki Patelarou Ulrich Ranft Arja Rautio Maria Skaalum Petersen Rémy Slama Hein Stigum Gunnar Toft Tomas Trnovec Stéphanie Vandentorren Pál Weihe Nynke Weisglas Kuperus Michael Wilhelm Jürgen Wittsiepe Jens Peter Bonde

OBJECTIVES Exposure to high concentrations of persistent organochlorines may cause fetal toxicity, but the evidence at low exposure levels is limited. Large studies with substantial exposure contrasts and appropriate exposure assessment are warranted. Within the framework of the EU (European Union) ENRIECO (ENvironmental Health RIsks in European Birth Cohorts) and EU OBELIX (OBesogenic Endocrin...

2016
Yvonne Wagner

BACKGROUND The aim was to assess the prevalence, distribution and associated risk factors of developmental defects of enamel (DDE) in 3-year-old Thuringian children in 2013 as part of a prospective cohort study. METHODS The subjects (n = 377) were all participants in a Thuringian oral health programme. Children of the birth cohort 2009/2010 were invited to dental examination in the first year...

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