نتایج جستجو برای: crossover model

تعداد نتایج: 2129833  

Journal: :Inf. Sci. 2007
Ping-Chen Lin Jiah-Shing Chen

Stock valuation is very important for fundamental investors to select undervalue stocks to earn excess profit. However, it may be difficult to use stock valuation results because different models generate different estimates on the same stock. This suggests that the value of a stock should be multi-valued rather than single-valued. We therefore develop a multi-valued stock valuation model based...

Journal: :Neural networks : the official journal of the International Neural Network Society 2006
Nicolás García-Pedrajas Domingo Ortiz-Boyer César Hervás-Martínez

In this work we present a new approach to crossover operator in the genetic evolution of neural networks. The most widely used evolutionary computation paradigm for neural network evolution is evolutionary programming. This paradigm is usually preferred due to the problems caused by the application of crossover to neural network evolution. However, crossover is the most innovative operator with...

2016
Zhiying Wang Botong Shen Jicai Jiang Jinquan Li Li Ma

Crossovers generated by homologous recombination ensure proper chromosome segregation during meiosis. Crossover interference results in chiasmata being more evenly distributed along chromosomes, but the mechanism underlying crossover interference remains elusive. Based on large pedigrees of Holstein and Jersey cattle with genotype data, we extracted three-generation families, including 147,327 ...

Journal: :Biostatistics 2007
Yun Lu Scott L Zeger

The case-crossover design was introduced in epidemiology 15 years ago as a method for studying the effects of a risk factor on a health event using only cases. The idea is to compare a case's exposure immediately prior to or during the case-defining event with that same person's exposure at otherwise similar "reference" times. An alternative approach to the analysis of daily exposure and case-o...

2008
Zhongying Shi Xia Wang

The focus of this paper is to study the flow crossover between two adjacent flow channels in a proton exchange membrane (PEM) fuel cell with serpentine flow field design in bipolar plates. The effect of gas diffusion layer (GDL) deformation on the flow crossover due to the compression in a fuel cell assembly process is particularly investigated. A three-dimensional structural mechanics model is...

2003
Young C. Kim Mikhail A. Anisimov Jan V. Sengers Erik Luijten

The character of critical behavior in physical systems depends on the range of interactions. In the limit of infinite range of the interactions, systems will exhibit mean-field critical behavior, i.e., critical behavior not affected by fluctuations of the order parameter. If the interaction range is finite, the critical behavior asymptotically close to the critical point is determined by fluctu...

Journal: :Genetics 2007
M Falque R Mercier C Mézard D de Vienne O C Martin

Crossover interference in meiosis is often modeled via stationary renewal processes. Here we consider a new model to incorporate the known biological feature of "obligate chiasma" whereby in most organisms each bivalent almost always has at least one crossover. The initial crossover is modeled as uniformly distributed along the chromosome, and starting from its position, subsequent crossovers a...

Journal: :Int. J. Intell. Syst. 2009
Ana M. Sánchez Manuel Lozano Pedro Villar Francisco Herrera

Most real-coded genetic algorithm research has focused on developing effective crossover operators, and as a result, many different types of crossover operators have been proposed. Some forms of crossover operators are more suitable to tackle certain problems than others, even at the different stages of the genetic process in the same problem. For this reason, techniques that combine multiple c...

2016
S. Barǐsić K. Uzelac

2014 The d ~ d’ crossover in the anisotropic free Bose gas is considered. The results agree with the renormalization group solution in the range of d’ ~ 2, where this solution exists and extend its validity to values of d’ 2. It is conjectured that for d’ = 1, n = 2 the crossover critical index equals two. LE JOURNAL DE PHYSIQUE TOME 36, AVRIL 1975, Classification Physics Abstracts 1.680 7.480 ...

ژورنال: :مجله اپیدمیولوژی ایران 0
زهرا رجب پور z rajabpoor student of msc degree of epidemiology: department of biostatistics and epidemiology, school of publiدانشجوی کارشناسی ارشد اپیدمیولوژی , گروه آمار زیستی و اپیدمیولوژی , دانشکده بهداشت وانستیتوتحقیقات ب سیدرضا مجدزاده s.r majdzadeh ph.d: associate professor of epidemiology, department of biostatistics and epidemiology, school of pدانشیار اپیدمیولوژی, گروه آمار زیستی و اپیدمیولوژی , دانشکده بهداشت وانستیتوتحقیقات بهداشتی , دانش علی فیض زاده خراسانی a feizzadeh khorasani ph.d. assistant of epidemiology: department of biostatistics and epidemiology, school of public healدستیار اپیدمیولوژی , گروه آمار زیستی و اپیدمیولوژی , دانشکده بهداشت وانستیتوتحقیقات بهداشتی , دانشگا عباس متولیان a motevalian ph.d: associate professor of epidemiology, department of biostatistics and epidemiology, school of pدستیار اپیدمیولوژی , گروه آمار زیستی و اپیدمیولوژی , دانشکده بهداشت وانستیتوتحقیقات بهداشتی, دانشگاه مصطفی حسینی m hoseini ph.d: assistant professor of biostatistics, department of biostatistics and epidemiology, school ofاستادیار آمار زیستی , گروه آمار زیستی و اپیدمیولوژی , دانشکده بهداشت وانستیتوتحقیقات بهداشتی , دانشگ

زمینه واهداف : سوانح ترافیکی یکی از مهمترین علل مرگ و میر در ایران است. سوء مصرف مواد نیز یکی از مشکلاتیست که سلامت عمومی جامعه را به خطر میاندازد. با توجه به اهمیت مشکلات ناشی از حوادث ترافیکی و شیوع نسبتا بالای سوء مصرف در رانندگان، بررسی تاثیر این عامل خطر بر بروز این حوادث اهمیت زیادی دارد. هدف این پژوهش برآورد تاثیر خطر رانندگی در وضعیت خماری بر بروز تصادفات رانندگی منجر به جرح میباشد.روش ...

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