區(qū)間綜合評(píng)價(jià)的物理質(zhì)心點(diǎn)值化方法研究
[Abstract]:As an important branch of economic statistics, the comprehensive evaluation of statistics has attracted more and more social attention. It has become an effective and popular tool in all kinds of assessment, evaluation, identification and other activities. On the premise of qualitative analysis, it makes a deeper and more comprehensive understanding of the research object through the quantitative expression of phenomena. As far as the process of statistical activities is concerned, statistical comprehensive evaluation is an important work after statistical investigation and statistical collation, and it is an important link to exert statistical functions.
In the traditional comprehensive evaluation, the data format is expressed in the form of point value. However, because of the characteristics of the evaluation methods, different methods have different requirements and regulations for the data structure and evaluation model. In the comprehensive evaluation, the data are often fuzzy, uncertain, and the data is obtained in the scope of the situation, so the data is The interval form of comprehensive evaluation appears. How to carry out evaluation activities in view of this situation has become one of the problems we want to study.
However, there are a series of problems in the use of interval data in the comprehensive evaluation. The interval evaluation under the holistic thinking often requires the development of a new evaluation technology because of the characteristics of interval numbers, thus abandoning the advantages of traditional evaluation technology. Therefore, the problem of the evaluation of the whole interval number is transferred to the problem of the point value of the interval number. In this paper, we propose to consider the point value of the interval index, which is similar to the physical center of mass. A fixed point method.
The idea of this paper is to divide the preconditions of interval number point-valued processing into two kinds: the distribution information is known and the distribution information is unknown, and then deal with them separately. The distribution similarity hypothesis of the same index is put forward, and the distribution is estimated according to the possible form of the distribution information, and then the distribution information is converted into the known distribution information.
The chapters are arranged as follows:
The first chapter mainly expounds the basic problems of interval comprehensive evaluation technology, introduces the generation of interval numbers, the types of interval numbers and the basic processing ideas of interval numbers in interval number evaluation, discusses the feasibility of point-valued as an interval index of comprehensive evaluation, and lays a foundation for the whole article.
In the second chapter, the operation of interval symbolic data is introduced, and the statistical description of interval symbolic variables is mainly studied, including the calculation of empirical density function, mean and variance, covariance and correlation coefficient of interval numbers.
In Chapter 3, under the condition that the information of interval auxiliary distribution is completely known, the distribution of variables is assumed to be random, that is, the distribution of different evaluation units on the same variable index can be different, the distribution of different variables on the same evaluation unit can be different, and the distribution form can be biased or peaked, including Referring to the method of Solving Irregular object's particle by using particle and mass synthesis in physics, this paper puts forward a method of finding information aggregation point-particle in evaluation unit's information space, and calculates the quantity-quality of evaluation information by using cumulative distribution.
In Chapter 4, assuming that the auxiliary information is unknown, but the distribution information of the same index should be similar, the point-valued processing of the distribution information in the case of single peak is discussed emphatically. Interval matrix can get more information, because there may be biased peaks in the single peak state, so the beta distribution is used to fit the information of the interval distribution of a single index, and the distribution function is obtained by parameter estimation.
In the fifth chapter, considering the existence of multi-peaks within the interval index, two feasible methods are proposed according to the characteristics of multi-peaks distribution: 1. directly estimating multi-peaks distribution; 2. estimating single-peaks after separating peaks. The former illustrates a probability density function with bimodal shape, and the latter uses clustering discrimination for reference. To separate the ideas, and compare the two methods through simulation examples.
Chapter 6, Summarization and Prospect. Summarize the research content of the full text, expound the problems existing in the paper and the problems needing further study.
【學(xué)位授予單位】:浙江工商大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2012
【分類號(hào)】:C81
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