On the has of fuzzy mathematics principle,this paper analyses fuzzy reliability of over -current release of DW15 type air circuit breaker; with viewpoint of system reliability,this paper gbes out fuzzy reliability of the over-current release at its acting 1000,2000 times.

Using the misty mathematics principle,this assay sets up a mathematics model to the mental state burthen capacity evaluation of athletics professional students,the model can demonstrate the quantity of students' mental load ability in fix quantify,so the evaluation result has high confidence level,and model can be used in the athletics teaching evaluation.

The mathematics principle of Gauss curve fitting is studied, and the arithmetic of Gauss curve fitting is given. The methods of Gauss curve fitting was used in single-channel sequential scanning ICP-AES(Inductively Coupled Plasma-Atomic Emission Spectrometry) to measure the peak value of the spectrum.

This paper introduces the mathematics principle and the design steps of building three dimension virtual velation technoligy. The reality between the virtual reality technology and the mathematic theory is discussed using the Virtual Reality Modeling Language (VRML)and an example.

The paper deals with the fuzzy probability calculation of welding seam of pressure vessel resisting fracture according to fracture mechanics theory and fuzzy mathematics principle.

Moreover in terms of the fuzzy mathematics principle,we gave a fuzzy synthetic evaluation to the single well engineering project,and applied it in reality.

In order to overcome the shortcoming of the un precision of traditional biological evaluation, the method by using fuzzy mathematics principle to choose various biological indexes to from the membership functions of boundary line of appraisal result so as to describe the water quality grade has been put forward in this paper.

The paper discuss the basic mathematics principle of assembly simulation and presented the design idea of assembly simulation and it's implementing process, including assembly sequence, constraints of part's disassembly movement process, assembly process simulation and so on.

Based on analyzing development of the vestibule’s smoke control methods and mathematics principle of the net model and the field model, author adopts numerical simulation to analyze smoke movement, airflow and effect of the smoke control after running the smoke control system.

Using fuzzy mathematics principle,this paper analyses the stock market, and applies fuzzy comprehensive,evalution method to determine the individual stock choosing. Moreover a computer aided stock choosing system was programmed by author.

Using fuzzy mathematics principle,this paper sets up a mathematics model based on the annual report,and obtains two kinds of methods to select the stock. Not knowing the accurate mathematics model,this method possess some characteristics of simplicity, manipulation, practicability and so on.

It is important, both theoritieally and pratically, that cthe thermodynamics formula is Proved by partial—derivative relations. This point of view ais fully explained in this paPer. At the same time the author has given out a great many exercises collected from the current essential physical chemistrytextbooks and the examination questions for postgraduate students enrolment in recent yearso·A new method for solution of these questions has been provided by means of mathematics principles. The method is...

It is important, both theoritieally and pratically, that cthe thermodynamics formula is Proved by partial—derivative relations. This point of view ais fully explained in this paPer. At the same time the author has given out a great many exercises collected from the current essential physical chemistrytextbooks and the examination questions for postgraduate students enrolment in recent yearso·A new method for solution of these questions has been provided by means of mathematics principles. The method is very efficetive and reliable because it has been brone out by more than 50 examples.

The forests in this area were severely ruined by reason of history. Accordingly,what mainly needs to be done is to plant on the desert land and to afforest on the barren hills and the wasteland. However,the current evaluation methods of soils are hardly fit for the local conditions. The characteristic of this kind being taken into consideration, evaluation object was completely confined to the soil itself. On the basis of a great deal of investigation and soil analysis, 10 items of soil texture, bulk density,...

The forests in this area were severely ruined by reason of history. Accordingly,what mainly needs to be done is to plant on the desert land and to afforest on the barren hills and the wasteland. However,the current evaluation methods of soils are hardly fit for the local conditions. The characteristic of this kind being taken into consideration, evaluation object was completely confined to the soil itself. On the basis of a great deal of investigation and soil analysis, 10 items of soil texture, bulk density, moisture, gravel content, soil thichness,.O. M. , total N,available P, pH .md calcium carbonate were chosen as evaluation factors on the principle of the combination of an all-round way with major points. And these factors were divided into three kinds of different characteristics, i. e. physica(from the 1st to the 5th) , nutritive (from the 6th to the 8th) ,and chemical (from the 9th to the 10th) in accordance with different properties.Following these,a group of experts was invited to conduct the index gradation and the weight distribution of evaluation factors. And then an expert system was established through a certain technical treatment. Based on the fuzzy mathematics principle,the soil quality was comprehensively judged.To sum up all the present evaluation methods of soils, there are 2 types; the gradation method and the score method. The gradation method is not of qualitive idea. The score method has obvious subjectivity. In order to overcome these shortcomings the fuzzy comprehensive judgement technique was applied to the soil evaluation. J. It uses the index system performed by the experts, which can strengthen objectivity of the results;2. The results were directly acquired by means of a series of operation; 3. Because the result was expressed in a vector, it was more entire than the score method's result which can be expressed by only one numerical value.

Instancing the coach SP141 in this paper, we use an eigensystem realization algorithm (ERA) to research the torsional vibration characteristics(TVC) on automobile power trains (APT), and discuss mainly as follows: the mathematics principle about The Least Realization Identification, the torsional vibration modal test technique, and transfer relationship between the strain mode shape and the displacement mode shape;the analysis to the TVC on APT, etc.