نتایج جستجو برای: crossover study
تعداد نتایج: 3985380 فیلتر نتایج به سال:
The analytical theory of one dimensional, dispersion free miscible displacement of oil by injection gas with nc component has shown that: the MMP is the lowest pressure at which any one of the initial oil, injection gas or crossover key tie lines becomes critical, which means that its length approaches to zero. In this paper, we propose a method for a solving multi component syst...
OBJECTIVE The course of anorexia nervosa often includes the emergence of bulimic symptoms and a crossover to the full syndrome of bulimia nervosa. However, clinicians' ability to predict who will develop bulimia nervosa is limited. The converse phenomenon, crossover from bulimia nervosa to anorexia nervosa, has not been investigated as thoroughly. The authors identified factors that are associa...
Geometric crossover is a representation-independent definition of crossover based on the distance of the search space interpreted as a metric space. It generalizes the traditional crossover for binary strings and other important recombination operators for the most frequently used representations. Using a distance tailored to the problem at hand, the abstract definition of crossover can be used...
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 ...
BACKGROUND The purpose of our study was to compare clinical and angiographic outcomes of planned culottes technique with that of provisional crossover single stenting in the treatment of true coronary bifurcation lesions (CBL) with drug-eluting stent (DES). METHODS True CBL patients (n = 104) were randomly assigned to either the provisional stenting of the side branch (crossover group) or the...
OBJECTIVES Under the prevailing conditions of imbalanced life table and historic gender discrimination in India, our study examines crossover between life expectancies at ages zero, one and five years for India and quantifies the relative share of infant and under-five mortality towards this crossover. METHODS We estimate threshold levels of infant and under-five mortality required for crosso...
Using unconstrained binary quadratic programming problem as a case study, we investigate the role of multi-parent crossover operators within the memetic algorithm framework. We evaluate the performance of four multi-parent crossover operators (called MSX, Diagonal, U-Scan and OB-Scan) and provide evidences and insights as to why one particular multi-parent crossover operator leads to better com...
background & aim: stroke in young adults is rare but can be devastating for the affected individuals and their families. some triggers of stroke may be acute but transient effects on the pathophysiological condition while other factors may be effective overa longer period. methods & materials: this study was a case-crossover study on 18 young adults. the study included patients aged 15-49 years...
Differential evolution is popular and efficient algorithm for global optimization. L-SHADE algorithm is one of the most successful adaptive versions of the algorithm. It uses only binomial crossover. We study employing the exponential crossover in the algorithm. Our tests are carried out on CEC2015 benchmark set for learning-based optimization competition. According to our results, the employin...
The main real-coded genetic algorithm (RCGA) research effort has been spent on developing efficient crossover operators. This study presents a taxonomy for this operator that groups its instances in different categories according to the way they generate the genes of the offspring from the genes of the parents. The empirical study of representative crossovers of all the categories reveals concr...
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