A method that can be used to compare the degree of overfitting of theoretically calculated curves in the field of hydrology
A theoretical calculation and over-fitting technology, applied in calculation, image data processing, 2D image generation, etc., can solve problems such as poor practicability and complex calculation, and achieve the effect of simple and easy steps.
Active Publication Date: 2021-09-24
NANJING HYDRAULIC RES INST
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These two methods to solve the overfitting problem have their own emphasis. The bias frequency method is more inclined to analyze from the perspective of error, while the Bayesian method focuses on analysis from the perspective of prior distribution, but in general , no matter which method is used, the overfitting problem is solved by adding norms. Both methods are biased towards derivation with formulas. The calculation of the method to solve the problem is very complicated and the feasibility is poor.
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[0023] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0024] refer to Figure 1 to Figure 4 , describe in detail the specific implementation steps of the present invention as follows:
[0025] Step Ⅰ. Define the computer program and related variables, and open the file where the data is located.
[0026] First use the C++ language to write a computer program, define two arrays double n1[n] and double n2[n] containing n double-precision data in the computer program, and a small right-angled triangle separated by two curves. Accumulated value x, y of the value, open the file where the data is located.
[0027] Step Ⅱ. Read text data
[0028] Read the required data into the pre-defined arrays double n1[n] and double n2[n] by using the for loop structure in the computer program to read the file.
[0029] Step Ⅲ. Calculate the data, get the result, close the file
[0030] According to the two gro...
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A method that can be used to compare the degree of overfitting of theoretically calculated curves in the field of hydrology, mainly using computer programs and calculus principles to compare the smoothness of two curves drawn with the same accuracy based on hydrological measured data, that is, the overfitting of the discriminant curve. Fitting problem, the accuracy of the two curves at the measured data points is the same, but the degree of overfitting is different. By comparing the lengths of two curves with the same precision drawn from hydrological measured data, the curve with longer length has larger fluctuations, poorer smoothness, and more serious over-fitting phenomenon, while the shorter curve has smaller fluctuations and lower smoothness. Well, the over-fitting phenomenon is relatively light, and it is a curve that meets the conditions, that is, a curve with a moderate degree of fitting and conforms to general laws, so as to solve the problem of over-fitting of the curve during hydrological data processing. It not only has relatively simple steps, but also abandons the derivation of complex mathematical formulas. With the help of computer program design, it is more convenient and accurate to select the curve with better fitting degree from the two candidate curves.
Description
technical field [0001] The present invention relates to a hydrological data processing method, in particular a method that can be used to compare the degree of overfitting of theoretical calculation curves in the field of hydrology. It is suitable for the scientific research of hydrological data processing to solve the problems caused by different calculation data [0002] The problem of judging the degree of overfitting of the drawn curve. Background technique [0003] The overfitting problem is a common problem in the field of scientific research. Simply put, to solve any problem, you need to follow the principle of specific analysis of specific problems, and use the specific method to solve a problem to solve other problems rashly. It is easy to make mistakes, that is, the general method principles are not summarized in the process of solving the problem, which is the problem of overfitting. In scientific research, it is often necessary to draw curves based on calculate...
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IPC IPC(8): G06F16/34G06T11/20
CPCG06T11/203G06F16/34
Inventor 王宗志黄增玉童海滨
Owner NANJING HYDRAULIC RES INST