نتایج جستجو برای: parametric analysis

تعداد نتایج: 2865101  

Journal: :International Journal of Advanced Computer Science and Applications 2013

2006
A. I. Lvovsky

Abstract We discuss the concept of characteristic squeezing modes applied to a travelling-wave optical parametric amplifier pumped by an ultrashort pulse. The characteristic modes undergo decoupled single-mode squeezing transformations, and therefore they form a useful basis to describe the evolution of the entire multimode system. This provides an elegant and intuitive picture of quantum stati...

Journal: :international journal of industrial engineering and productional research- 0
seyed mojtaba jafari henjani department of system analysis and control, faculty of computer science and control, national technical university “kharkov polytechnical institute”, kharkov, ukraine valeriy severin department of system analysis and control, faculty of computer science and control, national technical university “kharkov polytechnical institute”, kharkov, ukraine

the paper is devoted to solution of some problems in nuclear power station generating unit intellectual control systems using genetic algorithms on the basis of control system model development, optimizations methods of their direct quality indices and improved integral quadratic estimates. some mathematical vector models were obtained for control system multicriterion quality indices with due ...

Journal: :hepatitis monthly 0
ali kabir nikan health researchers institute, tehran, ir iran; department of epidemiology; faculty of public health; shahid beheshti university of medical sciences, tehran, ir iran. tel: +98-2144468645, fax: +98-2144476796

Journal: :nephro-urology monthly 0
maryam montaseri department of biostatistics, school of health, mazandaran university of medical sciences, sari, ir iran jamshid yazdani charati department of biostatistics, school of health, mazandaran university of medical sciences, sari, ir iran; department of biostatistics, school of health, mazandaran university of medical sciences, sari, ir iran. tel: +98-1133108696, +98-9127982518 fateme espahbodi departmant, cancer research center mazandran, medical faculty, medical science university, sari, ir iran

conclusions parametric models may provide complementary data for clinicians and researchers about how risks vary over time. the weibull model seemed to show the best fit among the parametric models of the survival of hemodialysis patients. results the results of a multivariate analysis of the variables in the parametric models showed that the mean serum albumin and the clinic attended were the ...

1999
Per K. Rekdal

A simple model of a two-mode non-resonant parametric amplifier is studied with special regard to non-classical features such as revivals and squeezing. The methods used apply for an arbitrary pump parameter. Detailed analytical and explicit expressions are given when the coupling of the two modes has an harmonic time-dependence. Despite its simplicity the model exhibits a very broad range of in...

2009
H.-C. Bandulet D. Comtois E. Bisson A. Fleischer H. Pépin J.-C. Kieffer P. B. Corkum D. M. Villeneuve

The process of high-order harmonic generation leads to the production of a train of attosecond-duration extreme ultraviolet (XUV) pulses, with one pulse emitted per optical half-cycle. For attosecond pump-probe experiments, a single, isolated attosecond pulse is preferable, requiring an almost continuous spectrum. We show experimentally and numerically that the addition of a second laser field,...

Journal: :Proceedings of the National Academy of Sciences 1974

Background and Aim: Thyroid cancer is one of the most common endocrine system cancer and rare types of cancers. However, despite to low death rate, the prevalence of this disease is high. Different factors affected on incident, recurrence and death in thyroid cancer patients. This study aimed to identify these factors. Method: In this historical cohort study, 631 cases of thyroid cancer referr...

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