The dichotomy model of education informatisation is essential, which means the measurement of education informatisation construction and development. Finite element differential equations play an essential role in signal and information teaching. To improve teaching information, the paper applies the dichotomy model of finite element differential equations to the reform of physics education information teaching. This article fully introduces the basic principles of the dichotomy model in finite element differential equations and introduces several analysis methods of the inverse Laplace transform of differential equations. At last, the method is applied to the informatisation of physics education to improve the quality of teaching.
MSC 2010
- 44A10
In 2010, the ‘Outline of the National Medium and Long-term Educational Reform and Development Plan (2010–2020)’ for the first time specifically put ‘accelerating the process of education informatisation’ as a chapter and proposed that information technology has a revolutionary impact on education development. Therefore, we must attach great importance to it and improve the quality of education through education informatisation. Subsequently, the Ministry of Education formulated the ‘Ten-Year Development Plan for Education Informatisation (2010–2020)’. As mentioned above, the formulation of the plans pointed out a direction for the reform of mathematics teaching, and at the same time, made mathematics classroom teaching ushered in realistic challenges [1]. For example, how to make information technology scientifically, rationally, efficiently and thoroughly applied to mathematics classroom teaching. As a result, information technology becomes a powerful tool for students to learn mathematical knowledge and solve mathematical problems. In this way, the quality of mathematics classroom teaching is comprehensively improved, and students’ innovative spirit and practical ability are cultivated.
The Laplace transform method is one of the essential methods for analysing continuous-time systems and it is also the basis of some other new transform methods. The origin of the Laplace transform method should be attributed to the British engineer Heaviside at the end of the 19th century. The ‘operator method’ he invented can solve some fundamental problems encountered in power engineering calculations, but it lacks rigorous mathematical arguments. Later, people were able to find a mathematical basis for this method by applying the works of French mathematician Laplace and re-given a strict mathematical definition. As a result, scholars named it Laplace Transformation (Pull Transformation for short) method [2]. Pull transform is used more in signal teaching and more convenient when dealing with circuit teaching problems.
We know that if the function satisfies the Dirichlet condition, the Fourier transform can be formed. But the requirement of absolute integrability in the Dirichlet condition restricts FT of specific growth signals [3]. For example, some signals continue to increase over time. Such signals cannot have FT, so a pull transformation needs to be introduced.
Let
Unlike the FT transformation, the independent variable s here is a complex number. For the sake of distinction, we call it complex frequency. The set of all its values is called the complex frequency domain (s domain). The image function is a function whose independent variable is complex and so it is a complex variable function [4]. It is already learned that the independent variable will be an actual number in an actual variable function. Therefore, the LT method is a complex frequency domain transform method. We also often call it s-domain analysis.
LT is integrated from 0, so the value of the function in the interval Linearity:
Time-domain translation:
s domain translation:
Scale transformation:
Time-domain differentiation:
Complex frequency domain integration:
Convolution theorem:
When we are teaching circuits, we often fail to explain the meaning of the problem due to too many unknown parameters or maybe because of the complicated steps in solving the problem, which prevents students from clearly understanding the idea of solving the problem [6]. But, now, we need to quote/explain a new transformation-the inverse transformation of the pull transformation. Its problem-solving ideas are as follows: 1) Use partial fraction method in which rational fractions are decomposed into partial fractions and an image function in the form of rational fractions is decomposed into partial fraction sums to solve them with the help of commonly used pairs of pull transformations; 2) Solve the properties of LT; 3) Solve by long division where we use the numerator as the dividend and the denominator as the divisor to find the result; and 4) Solve by the residue method. The partial fraction method is commonly used in the circuit teaching process. Because this method is not only the most basic in signal teaching, it is also the easiest for students to understand when teaching circuits.
In the circuit, what we think of for the first time is often to use the circuit analysis method to solve the circuit, such as the node current method and loop voltage method. But these methods are not suitable when solving more complicated circuits. In this case, we need to introduce a pull transformation [7]. First, understand several basic models of circuit operations. The resistance element calculation model is shown in Figure 1.
Fig. 1
Resistance model.

Fig. 2
Capacitance model.

The inductance calculation model is shown in Figure 3.
Fig. 3
Inductance model.

We use the pull transform to solve the problem in the circuit to make the circuit calculation simple. The specific steps are as follows: 1) Find the initial state; 2) We express the power supply, resistance, reactance and capacitance in the frequency domain and make an operation diagram corresponding to the circuit diagram; 3) List the equations; 4) Solve the equation to obtain the image function of the unknown quantity; 5) Time-domain expression obtained by inverse pull transform; and 6) Substitute the initial value. The following example illustrates how to solve a circuit diagram using a pull transformation.
Fig. 4
RL series circuit.

Through example 1, it can be seen that the pull transformation can be applied to the problem-solving of circuit teaching and is more conducive to the understanding of circuit problems.
After the switch is closed, the frequency domain representation of the inductance, capacitance and resistance in the circuit is obtained. We draw circuit diagram 5(b).
Fig. 5
Hybrid circuit with inductance.

From this point of view, the pull conversion is a necessary means for processing signals and for circuit teaching [8]. Therefore, it is imperative to use and be able to use the pull transform. Furthermore, it has a greater potential for improving learners’ independent innovation ability.
Fig. 6
Schematic diagram of area dividing line.

First, determine whether the number of nodes in the boundary of the two sub-regions formed by the segmentation of the measured line segment is less than 4. If it is less than 4, it indicates that the line segment
Then, determine the positional relationship between all points and line segments on the boundary except for points The product of the matrix determinants of any two adjacent points e and f is equal to zero, indicating that points e and f are on the line segment ij or its extension. Assuming that the determinant of pointe is zero, it is necessary further to determine the relationship between pointe and line segment The matrix determinant product of any two adjacent points e and f is not equal to zero. If the product is less than zero, it means that the points e and f are on both sides of the thousand line segment Suppose the product of the matrix determinants of all points except Calculate the distance r between the midpoint
There are many dividing lines that meet the above requirements. Selecting the best dividing line from these possible dividing lines is the key technology of the algorithm. It directly affects the quality and efficiency of meshing [12]. In the previous papers, the optimal dividing line was determined using two non-dimensional parameters, namely the linear combination of the deviation of the angle and the length
The formula
The possible dividing line corresponding to the minimum value of
When the divided area is a convex polygon, equation (22) is applied. When divided area is a concave polygon, equation (23) is applied. In equations (21) and (22),
In the above formula, the values of the weight factors
In this paper, through the study of finite element differential dichotomous farad transformation, students can understand the meaning and nature of pull transformation. In addition to playing a significant role in signal processing, pull transformation can also be applied in the information teaching of circuit education. The introduction of other methods of teaching broadens the students’ thinking and inspires their thinking. Informatisation teaching mode has improved students’ interest and efficiency in learning and further improved their self-learning ability and innovation ability.
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