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Invariant image is widely used to remove shadows in images, however, the proposed methods based on invariant image are too difficult to implement. In this paper, a simple method is proposed in this field. First, the Fisher discrimination criterion is applied to find the invariant direction accurately, and then the corresponding invariant image can be obtained. Second, the linear least squares fitting...
In order to address the existing problem that only the measurement of uncertainty is provided for the tolerance results, a calculating method of sphericity error evaluation standard uncertainties studied according to new Geometrical Product Specification and Verification(GPS). Sphericity error evaluation mathematical model based on minimum area method is raised. Sphericity error value is obtained...
A new method for optimization control problem based on generalized work principle of optimal control principle is presented. The method of estimating mathematical model with the more precise ballistic parameters is obtained. So solution to optimum control of a non-linear system by criterion of generalized activity is introduced. A universal computing method in construction of optimum control MLRS...
Nickel (Ni) plays an important role in the growth of plants, but it is also a kind of heavy metal which can easily enrich in soil and exert toxic effect on plants. To evaluate the Ni stress on the maize growth, a pot experiment was conducted by black soils sampled from the field in the middle of Jilin province. And Ni was equilibrated in the soils to graded levels from 0 to 800mg kg-1 soil. The main...
The existing and mature CFD technology is applied in this paper. Through the simulation of the prototype, it's found that there are obvious vortices in the cochlea part of the centrifugal multi-wing type ventilator. Two schematic plans are adopt to improve efficiency of the centrifugal multi-wing type ventilator. These vortices can cause high energy loss. At the same time, they increase noise of the...
The obstacle-climbing performance on uneven terrain was analyzed according to the characteristics of the lunar rover based on double-half-revolution mechanism. Because the obstacle-climbing model of uneven terrain was relatively complicated and the numbers of independent equation were less than those of unknown variables, a new evaluation index of the obstacle-climbing capability was presented. Pointed...
Based on the standards of the Geometric Product Specification and Verification-the new generation of GPS, a minimum zone mathematical model for evaluation of flatness error was given. The mathematical model of flatness error was first constructed by using Lp-norm on the basis of operations of the new generation of GPS. According to the characteristics of flatness error, an improved Particle Swarm...
In the past decades, regression approach was a main gene mapping method. For avoiding the QTL mapping to estimate the gene effects, the molecular marker regression was used to research the quantitative trait controlled by polygene under the condition of complete linkage between gene locus and marker. For the utilization of this method, the recombination influence on precision and accuracy estimating...
Identifying the type and estimating the effect of genes controlling the quantitative trait is very useful to animal selection, breed and livestock production. In traditional quantitative genetics, the gene effect causing the variation of quantitative trait is researched as a whole body. The molecular marker technique provided an approach to analysis the gene characteristic of single gene. For avoiding...
In the past, the gene effect causing the variation of quantitative trait was researched as a whole body. For avoiding the QTL mapping, the molecular marker regression was used to research the quantitative trait controlled by polygene. A general analysis model using molecular marker material was established for estimating the gene effect controlling quantitative trait, and the mathematical relation...
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