scholarly journals Is this a fake QTL? A short note on analysis of multiple QTL peaks on the same chromosome

2018 ◽  
Author(s):  
Mathias Lorieux
Keyword(s):  
Short Note ◽  
Expected Value ◽  
Lod Score ◽  
F Test ◽  
Simple Method ◽  
Multiple Qtl

AbstractA simple method is proposed to detect fake QTL provoked by spurious linkage with a true QTL. The method is based on the calculation of the expected value of the teststatistic (F-test and LOD score are considered) at the putatively fake QTL position.

scholarly journals Portfolio Selection Based on Distance between Fuzzy Variables

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Weiyi Qian ◽  
Mingqiang Yin
Keyword(s):  
Mathematical Models ◽  
Portfolio Selection ◽  
Expected Value ◽  
Simple Method ◽  
Numerical Examples ◽  
Fuzzy Variables ◽  
Fuzzy Environment ◽  
Investment Return ◽  
New Models ◽  
Different Types

This paper researches portfolio selection problem in fuzzy environment. We introduce a new simple method in which the distance between fuzzy variables is used to measure the divergence of fuzzy investment return from a prior one. Firstly, two new mathematical models are proposed by expressing divergence as distance, investment return as expected value, and risk as variance and semivariance, respectively. Secondly, the crisp forms of the new models are also provided for different types of fuzzy variables. Finally, several numerical examples are given to illustrate the effectiveness of the proposed approach.

Distribution of the circulation times in a batch mixed by two impellers on a common shaft

1989 ◽  
Vol 54 (3) ◽  
pp. 633-644
Author(s):  
Vladimír Kudrna ◽  
Václav Koza ◽  
Jiří Hájek
Keyword(s):  
Theoretical Model ◽  
Tracer Particle ◽  
Visual Observation ◽  
Expected Value ◽  
Experimental Results ◽  
Statistical Characteristics ◽  
Frequency Function ◽  
Simple Method ◽  
Primary Processing ◽  
Mixed Batch

The paper has been devoted to the study of the circulation times in a batch mixed by several impellers on a common shaft. A simple method has been used to carry out the measurements based on visual observation of the motion of a tracer particle in the mixed batch. Individual passages of the tracer particle through the check surface have been signalized to a computer performing the primary processing of data, calculation of the basic statistical characteristics (expected value and variance) and the frequency function of the circulation times of the tracer particle. A model developed earlier for a vessel mixed by a single impeller has been used to interpret the data. This theoretical model has been compared with experimental results.

A short note on the construction of life tables and multiple decrement tables

1987 ◽  
Vol 114 (3) ◽  
pp. 569-580 ◽  
Author(s):  
H. R. Waters ◽  
A. D. Wilkie
Keyword(s):  
Life Table ◽  
Short Note ◽  
Direct Methods ◽  
Life Tables ◽  
Numerical Results ◽  
Simple Method ◽  
Force Of Mortality ◽  
Explicit Function

The purpose of this short note is to explain a simple method of constructing a life table, given an explicit function for the force of mortality, μx, for all x. A similar method can be applied to the construction of multiple decrement tables, given explicit functions for the separate forces of transition, μbx, μcx, etc, from one ‘active’ status (a) to various ‘dead’ statuses (b, c, etc) for all x.Although numerical results for the examples discussed in this note could be calculated equally well by more direct methods than the ones described herein, results for more complicated examples involving multiple status tables, in which transition back and forth between statuses is possible, cannot in general be calculated by such direct methods, and our methods provide a practical way by means of which numerical results for these more complicated cases can be calculated.

scholarly journals Characterizing Attainable Claims: A New Proof

2010 ◽  
Vol 47 (04) ◽  
pp. 1013-1022
Author(s):  
Michael R. Tehranchi
Keyword(s):  
Discrete Time ◽  
Free Market ◽  
Short Note ◽  
Expected Value ◽  
Market Model ◽  
Contingent Claim ◽  
Martingale Measures ◽  
Equivalent Martingale Measures ◽  
Equivalent Martingale

This short note offers a new proof of the following fact: in a discrete-time arbitrage-free market model, a contingent claim is attainable if and only if its expected value is the same under all equivalent martingale measures. The proof is based on Rogers' (1994) proof of the Dalang-Morton-Willinger (1990) theorem.

scholarly journals Characterizing Attainable Claims: A New Proof

2010 ◽  
Vol 47 (4) ◽  
pp. 1013-1022 ◽  
Author(s):  
Michael R. Tehranchi
Keyword(s):  
Discrete Time ◽  
Free Market ◽  
Short Note ◽  
Expected Value ◽  
Market Model ◽  
Contingent Claim ◽  
Martingale Measures ◽  
Equivalent Martingale Measures ◽  
Equivalent Martingale

This short note offers a new proof of the following fact: in a discrete-time arbitrage-free market model, a contingent claim is attainable if and only if its expected value is the same under all equivalent martingale measures. The proof is based on Rogers' (1994) proof of the Dalang-Morton-Willinger (1990) theorem.

A simple way for producing holographic filters suitable for image improvement

1978 ◽  
Vol 36 (1) ◽  
pp. 226-227
Author(s):  
K.-H. Herrmann ◽  
E. Reuber ◽  
P. Schiske
Keyword(s):  
Transfer Functions ◽  
Diffraction Order ◽  
Lateral Position ◽  
Simple Method ◽  
Spatial Frequencies ◽  
Resolution Electron ◽  
Wiener Filters ◽  
Image Improvement ◽  
Optical Reconstruction ◽  
Set Up

Aposteriori deblurring of high resolution electron micrographs of weak phase objects can be performed by holographic filters [1,2] which are arranged in the Fourier domain of a light-optical reconstruction set-up. According to the diffraction efficiency and the lateral position of the grating structure, the filters permit adjustment of the amplitudes and phases of the spatial frequencies in the image which is obtained in the first diffraction order.In the case of bright field imaging with axial illumination, the Contrast Transfer Functions (CTF) are oscillating, but real. For different imageforming conditions and several signal-to-noise ratios an extensive set of Wiener-filters should be available. A simple method of producing such filters by only photographic and mechanical means will be described here.A transparent master grating with 6.25 lines/mm and 160 mm diameter was produced by a high precision computer plotter. It is photographed through a rotating mask, plotted by a standard plotter.

Rotary Beveling for In Situ Thin-Section Microscopy of Cell Cultures

1981 ◽  
Vol 39 ◽  
pp. 550-551
Author(s):  
Dean A. Handley ◽  
Jack T. Alexander ◽  
Shu Chien
Keyword(s):  
Cell Growth ◽  
Cell Cultures ◽  
Molecular Interactions ◽  
Convenient Method ◽  
Petri Dish ◽  
Simple Method ◽  
Thin Section Microscopy ◽  
Thin Sectioning ◽  
Organic Fluids

In situ preparation of cell cultures for ultrastructural investigations is a convenient method by which fixation, dehydration and embedment are carried out in the culture petri dish. The in situ method offers the advantage of preserving the native orientation of cell-cell interactions, junctional regions and overlapping configurations. In order to section after embedment, the petri dish is usually separated from the polymerized resin by either differential cryo-contraction or solvation in organic fluids. The remaining resin block must be re-embedded before sectioning. Although removal of the petri dish may not disrupt the native cellular geometry, it does sacrifice what is now recognized as an important characteristic of cell growth: cell-substratum molecular interactions. To preserve the topographic cell-substratum relationship, we developed a simple method of tapered rotary beveling to reduce the petri dish thickness to a dimension suitable for direct thin sectioning.

Development of a simple method for the determination of single nucleotide polymorphisms

2010 ◽  
Vol 34 (8) ◽  
pp. S75-S75
Author(s):  
Weifeng Zhu ◽  
Zhuoqi Liu ◽  
Daya Luo ◽  
Xinyao Wu ◽  
Fusheng Wan
Keyword(s):  
Single Nucleotide Polymorphisms ◽  
Nucleotide Polymorphisms ◽  
Simple Method ◽  
Single Nucleotide
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