This article uses the curve equation model to describe the initial value problem of differential equations in BIM project management. A new set of rolling curve-solving models is established for step-aligning in BIM project management. Based on the premise that the differential equation can be solved numerically, we appropriately simplify or set the required relational functions in the equation. Finally, we use mathematical software to numerically solve the differential equation and obtain the discrete function of the rolling curve. The research shows that the accuracy of the step flatness and the width of the stepped groove formed by the rolling curve of the solution in this paper is better than the original solution.

#### Keywords

- Curvilinear equation model
- BIM engineering management
- Internal right-angle step
- Rolling straight curve
- Differential equation solution method

#### MSC 2010

- 34A12

As a new technology for forming shaft parts, cross wedge rolling has the advantages of material saving, high efficiency, and low energy consumption. The technology has broad application prospects in the machinery industry, especially the automotive industry. In the cross wedge rolling to form the inner corner steps, a transition section needs to be designed between the roll widening section and the finishing section, which we call the rolling section. In this way, the forming surface on the wedge shape can be gradually transformed into a finishing surface so that the rolling piece can gradually form an inner right-angle step. The design method of the rolling section is to use a smooth curve to cut off the corresponding wedge-shaped part in the direction perpendicular to the base surface of the roll to form the transition section [1]. The smooth curve forming the transition section is the rolling curve. The rolling curve design is the key technology for accurately forming the right-angle steps in the cross wedge rolled parts.

Firstly, the volume of the unformed zone is solved as a function of the rolling progress, and then the volume invariance principle is used to solve the rolling curve. The volume function is the key to the solution. Although the volume expression method and the specific solution method are different, the general can be summarized. First, assume a straight line, a smooth curve, or a simple rolling curve as the basic curve; we use the basic curve function with the rolling rotation relationship to derive the rolled piece Big end radius change function. Then we use the big-end radius function as the boundary condition to solve the volume model of the unformed area of the rolling piece and obtain the volume function under the corresponding parameter [2]. The advantage of this type of volume solution method is that it is relatively simple and easy to calculate. The disadvantage is that the calculation accuracy depends heavily on the assumed curve as the initial condition. This type of calculation is to correct the assumed smooth curve instead of solving a theoretical rolling curve. Although this kind of algorithm has certain practical value when dealing with simple rolling alignments such as inner right-angle steps. Still, it is ineffective for some rolling alignments with more complicated deformation processes (such as narrow step rolling alignment process). This is because it is difficult to obtain an initial curve close to the theoretical curve through simple assumptions, which leads to large errors in the calculation results. It isn't easy to guarantee the accuracy of the solution. In actual production, it is usually necessary to perform a lot of real rolling correction work on the calculated value before applying it to step forming. This leads to excessive reliance on experience in mold design, resulting in long mold design cycles, high costs, and poor design reliability.

This article starts from the basic geometric constraint relations of rolls to limit the uncertainties of various factors. We fully considered the influence of various factors on the results and established a new set of rolling curve solution models. The basic idea of this theory is to substitute the rolling curve in the result as the calculation condition of the big end radius. According to the related function of various factors, we describe the problem of solving the rolling curve as an initial value problem of a differential equation. Based on the premise that the differential equation can be solved numerically, we appropriately simplify or set each relationship function required in the equation. Finally, mathematical software is used to numerically solve the differential equation and obtain the discrete function of the rolling curve.

The purpose of clarifying the relationship between the functions that affect the rolling curve is to obtain a more accurate solution model. It is generally believed that 5 initial values determine the rolling curve. They are the forming angle _{0}, the center distance _{C}_{k}

The volume solution is based on the core content of the volume invariance method. We have conducted a lot of discussion and analysis. The volume solution of the unformed zone is divided into two categories: simplified model and contact zone model. The second type of model is more accurate and closer to the actual situation, but there are very complicated boundary conditions for calculating the model volume directly. The simple model can solve the volume function by simple multiple integrations [4]. Combining the characteristics of the two types of models and the conditions for solving the differential equations, we use the following general formula to express the volume _{1} is the radius after step forming.

Figure 2 is a schematic diagram of the restraint relationship of the rolls. We need to use the contact relationship to determine the function between the horizontal axis X of the rolling curve and the radius _{φ}

The shape of the unformed area of the rolled piece is obtained by the contact separation line rotating with the rolled piece. There is a geometric constraint relationship between the maximum radius and the height of the rolled surface. The height H of the rolled surface is obtained by designing the mold through the horizontal axis X of the rolling curve. It is a function of the roll angle. Combining equation (3), we can express the large-end radius function _{φ}

_{E}

In many rolling curve calculations, the radius of rotation _{k}_{k}

_{φ}_{θ}_{φ}_{θ}_{C}_{k}_{k}

According to the factor function relations and expressions, the following differential equations can be obtained by combining formulas (1), (2), (4), and formula (7):

In the formula:
_{0} − _{1} ∫ _{1}) tan

Since the right side of the differential equation (9) is very complicated, it is impossible to obtain a general solution. Therefore, it is necessary to use mathematical software to solve the numerical solution in the domain interval. Generally speaking, _{n}_{+1} in turn, the command line is:

The _{0} parameter is the initial value of the differential equation, which is expressed as

The best expression of the volume correction function

The influence of the speed ratio function _{B}_{C}_{0}) / _{0}. Suppose the speed ratio of the third stage of rolling and the finishing process is a constant value _{s}_{C}_{1}) / _{1}. It is assumed that the speed ratio increases linearly during the rolling process [7]. Therefore, the formula for the speed ratio of the first and second stages of rolling can be expressed as:

_{E}_{1} + _{2}) / _{0} in the application.

We take the internal right-angle step rolling model as an example to analyze the problem. The differential equation can be established smoothly since the integral term in the general volume formula (1) is the upper integral function and the lower integral limit is 0. Therefore, the spiral cone volume integral function needs to be appropriately transformed to establish the differential equation. The simple volume formulas of the three stages of rolling are:

Φ_{1–1} and Φ_{1–2} respectively constitute the rotation angle function of the two parts of the first stage of rolling. Φ_{2} and Φ_{3} are the rotation angle functions of the 2nd and 3rd stages of rolling, respectively. The volume _{1} of the first stage, let Φ_{1–2}, and the volume of the contact area of the first stage be the general formula. The G function in formula (1) meets the requirements of formula (1). Since the lower limit of the volume integral in the second stage is not 0, and there are independent variable terms, we need to transform the integral formula. We transform _{2} into the following form:

The second term of equation (13) represents the volume of the current corner

We use numerical simulation and real rolling experiments, respectively, to verify the correctness of the differential equation to solve the rolling curve. The rolling curve calculated by the Matlab program is shown in Figure 4. The curve in this paper has a larger value in the X direction than the precise rolling curve. This is consistent with the small design curve in previous practical experience. We use the curve to carry out Pro / _{0} = 26_{1} = 16_{0} = 250_{B}^{−1}, rolling material 45# steel, rolling temperature 1150°C.

The purpose of limiting some minor unstable factors is to simplify the simulation process. The hypothesis is that the mold is regarded as a rigid body with a constant temperature, and the rolling friction is regarded as sheer friction. Select the constant friction coefficient.

The simulation results of the inner right-angle steps are shown in Figures 5a and 5b. Intuitively, it can be seen that the shaping effect of this article is slightly better. We select 24 points uniformly distributed on the forming step surface (Figure 5c) to quantify the forming effect. We take the axial coordinate value Z and solve the mean and variance as shown in Table 1. The mean value in the solution in this paper is closer to the target extension of 60mm, and the variance is significantly smaller than the original solution [10]. This shows that the flatness of the step surface obtained by the simulation is better.

Analysis of the axial coordinate Z value of the measuring point on the forming surface

project | Mean x/mm | Variance s/mm^{2} |
---|---|---|

Simulate the original solution | 31.26 | 3.57 |

Simulate new solutions | 30.87 | 1.43 |

The real rolling original solution | 33.54 | 1.45 |

New solution for real rolling | 31.02 | 1.36 |

We conducted real rolling experiments on the H500 cross wedge rolling mill. The mold parameters used in the experiment are consistent with the simulation parameters. Due to the parallel implementation with other experiments, the material head is designed to be rolled with a big end support method [11]. The rolling parts are shown in Figure 6. The right end of the part is the original solution rolling step, and the left is the paper solution rolling step. Since the actual rolled parts are small, the 24-point measurement method in the simulation results cannot be used. Therefore, we use the 8-point method of uniform distribution in a circular ring for measurement. The mean value and variance of the step groove width are shown in Table 1. It can be seen that the width of the stepped groove of the real-rolled parts is greatly affected by the rolling curve, and the planarity is not greatly affected. In addition, the actual rolling results are highly consistent with the simulation, and the curve in this paper has a more excellent effect on the inner right-angle step forming.

We take the inner right-angle step as the research object and use the Matlab software to program and solve the rolling curve. The forming effect of the precise rolling curve and the curve in this paper are compared by finite element simulation and real rolling experiments. We take 8n points uniformly distributed on the formed step surface in the result and compare the mean value and variance of the axial coordinate of the value points. We use the differential equation method to solve the rolling curve and theoretically avoid the influence of the assumed large-end radius function on the accuracy of the volume solution. This makes the mathematical model closer to the actual situation. This solution can solve the inner right-angle step rolling curve with good forming effect and provide a new theoretical system for the research on rolling of other complex steps.

#### Analysis of the axial coordinate Z value of the measuring point on the forming surface

project | Mean x/mm | Variance s/mm^{2} |
---|---|---|

Simulate the original solution | 31.26 | 3.57 |

Simulate new solutions | 30.87 | 1.43 |

The real rolling original solution | 33.54 | 1.45 |

New solution for real rolling | 31.02 | 1.36 |

Law of interest rate changes in financial markets based on the differential equation model of liquidity Basalt fibre continuous reinforcement composite pavement reinforcement design based on finite element model Industrial transfer and regional economy coordination based on multiple regression model Enterprise financial strategy and performance management analysis based on principal component analysis Study on the Dynamic Change of Regional Water Level and Climate Based on Forecast Equation Satisfactory consistency judgement and inconsistency adjustment of linguistic judgement matrix Analysis of the relationship between industrial agglomeration and regional economic growth based on the multi-objective optimisation model Constraint effect of enterprise productivity based on constrained form variational computing The impact of urban expansion in Beijing and Metropolitan Area urban heat Island from 1999 to 2019 Ultrasonic wave promoting ice melt in ice storage tank based on polynomial fitting calculation model Training Model of Basketball Offensive Route Based on Nonlinear Differential Equation Optimization Algorithm of New Media Hot Event Push Based on Nonlinear Differential Equation Mathematical Differential Equation in Calculating the Strength of Building Beam Structure Impact Resistance Stability of Building Structural Engineering Based on Fractional Differential Equations The Technical Research on the Assessment of Network Security Situation Based on D-S Evidence Theory Computer big data modeling system based on finite element mathematical equation simulation Uniqueness of system integration scheme of artificial intelligence technology in fractional differential mathematical equation Uniqueness of system integration scheme of artificial intelligence technology in fractional differential mathematical equation The Composition System of Pop Music Movement Based on Finite Element Differential Equations The Structure and Influencing Factors of Innovation and Entrepreneurship Ability of Higher Vocational Students Based on Structural Equation Model Model System Study of Accordion Score Based on Fractional Differential Equations Data mining of Chain convenience stores location Parameter Id of Metal Hi-pressure State Equation P-Matrix Reasoning and Information Intelligent Mining Research on deformation monitoring of tunnel engineering based on 3D laser scanning Intelligent Recommendation System for English Vocabulary Learning – Based on Crowdsensing Preservation and utilisation of historic buildings in old district of Guangzhou from the perspective of space syntax Application of calculus function and value chain analysis method in the quantification of financial flexibility management indicators Copyright protection of original online music products based on applied statistical mathematics – take music trade network as an example Optimal Research in Piano Shape Sound and Sound Propagation Model Based on Nonlinear Differential Equations Regarding new wave distributions of the non-linear integro-partial Ito differential and fifth-order integrable equations Badminton players’ trajectory under numerical calculation method Research on the influencing factors of agricultural product purchase willingness in social e-commerce situation Research on mathematical quantitative model of the incremental cost and income of green small towns based on the whole life cycle Mathematical methodology in the seismic resilience evaluation of the water supply system Prediction of surface quality in end milling based on modified convolutional recurrent neural network Research on sustainable design of sports centre based on algorithm verification Innovations to Attribute Reduction of Covering Decision System Based on Conditional Information Entropy Institutional investor company social responsibility report and company performance Mathematical analysis of China's birth rate and research on the urgency of deepening the reform of art education First-principles calculations of magnetic and mechanical properties of Fe-based nanocrystalline alloy Fe _{80}Si_{10}Nb_{6}B_{2}Cu_{2}Has the belt and road initiative boosted the resident consumption in cities along the domestic route? – evidence from credit card consumption Attitude control for the rigid spacecraft with the improved extended state observer Application of Higher-Order Ordinary Differential Equation Model in Financial Investment Stock Price Forecast Informatisation of educational reform based on fractional differential equations Research on the control of quantitative economic management variables under the numerical method based on stochastic ordinary differential equations Network monitoring and processing accuracy of big data acquisition based on mathematical model of fractional differential equation System dynamics model of output of ball mill Sensitivity Analysis of the Waterproof Performance of Elastic Rubber Gasket in Shield Tunnel Design of Morlet wavelet neural network to solve the non-linear influenza disease system Motion about equilibrium points in the Jupiter-Europa system with oblateness Badminton players’ trajectory under numerical calculation method Optimal preview repetitive control for impulse-free continuous-time descriptor systems Development of main functional modules for MVB and its application in rail transit Study on the impact of forest fire prevention policy on the health of forest resources Value Creation of Real Estate Company Spin-off Property Service Company Listing Selection by differential mortality rates Digital model creation and image meticulous processing based on variational partial differential equation The modelling and implementation of the virtual 3D animation scene based on the geometric centre-of-mass algorithm The policy efficiency evaluation of the Beijing–Tianjin–Hebei regional government guidance fund based on the entropy method The transfer of stylised artistic images in eye movement experiments based on fuzzy differential equations Research on behavioural differences in the processing of tenant listing information: An eye-movement experiment Innovation of Economic Management Risk Control in Retailer Supply Chain Based on Differential Equation Model A review of the treatment techniques of VOC Some classes of complete permutation polynomials in the form of ( x ^{pm}−x +δ )^{s}+ax ^{pm}+bx overF _{p2m}The consistency method of linguistic information and other four preference information in group decision-making Statistical Model of College Ideological and Political Learning Based on Fractional Differential Equations Research on the willingness of Forest Land’s Management Rights transfer under the Beijing Forestry Development Nonlinear Differential Equation in Anti-aging Test of Polymer Nanomaterials A mathematical model of the fractional differential method for structural design dynamics simulation of lower limb force movement step structure based on Sanda movement Fractal structure of magnetic island in tokamak plasma Mechanics of Building Structural Materials Based on Lagrangian Mathematical Model Analysis Numerical calculation and study of differential equations of muscle movement velocity based on martial articulation body ligament tension Study on the maximum value of flight distance based on the fractional differential equation for calculating the best path of shot put The Mental Health Education Management of Higher Vocational Students Based on Fractional Differential Equations Sports intensity and energy consumption based on fractional linear regression equation University Ideological and Political Learning Model Based on Statistical Memory Curve Mathematical Equation Analysis of the properties of matrix rank and the relationship between matrix rank and matrix operations Research on Resonance Properties of Semantic Wave Fractal Fractals Based on Quantitative Analysis of English Corpus Research on urban landscape big data information processing system based on ordinary differential equations Modeling of fractional differential equation in cloud computing image fusion algorithm Study on Establishment and Improvement Strategy of Aviation Equipment Research on Financial Risk Early Warning of Listed Companies Based on Stochastic Effect Mode Nonlinear strategic human resource management based on organisational mathematical model Conventional Algorithms in Sports Training Based on Fractional Differential Equations Dynamic Nonlinear System Based on Complex System Theory in the Development of Vocational Education The Algorithm Accuracy of Mathematical Model to Improve the Transmission Speed of E-commerce Platform The Security of Database Network Model Based on Fractional Differential Equations Electric Vehicle Mechanical Transmission System Based on Fractional Differential Equations The Practice System of Physics and Electronics Courses in Higher Vocational Colleges Based on Fractional Differential Equations The Economic Model of Rural Supply and Demand Under the Data Analysis Function Based on Ordered Probit 3D Modeling System of Indoor Environment Art Landscape Design under Statistical Equation Electronic Information Security Model of Nonlinear Differential Equations The Optimization Model of College Students' Physical Exercise Motivation and Self-control Ability Based on the Mathematical Model of Probability Theory A new variety from Sichuan, China— Paris polyphylla var.nullopetalina (Trilliaceae)Impact of ASEAN-China free trade area on fishery value chain based on difference-in-difference method Spatial–temporal graph neural network based on node attention A contrastive study on the production of double vowels in Mandarin Mathematical analysis of civil litigation and empirical research of corporate governance Health monitoring of Bridges based on multifractal theory Health status diagnosis of the bridges based on multi-fractal de-trend fluctuation analysis Application and risk assessment of the energy performance contracting model in energy conservation of public buildings Sensitivity analysis of design parameters of envelope enclosure performance in the dry-hot and dry-cold areas TOPSIS missile target selection method supported by the posterior probability of target recognition The incentive contract of subject librarians in university library under the non-linear task importance Research on indoor environment design of comprehensive commercial shopping center based on numerical simulation Empirical analysis of the economic absolute income hypothesis based on mathematical statistics Realization of Book Collaborative Filtering Personalized Recommendation System Based on Linear Regression Equation Study on Interactive Relations between Enterprise Social Media and Decision Style Based on a vector Autoregressive Model Research on Dynamics of Flexible Multibody System with Deployable Antenna Based on Static Lagrangian Function The Optimization of Mathematics Teaching Models in Colleges and Universities Based on Nonlinear Differential Equations Study on spatial planning and design of learning commons in university libraries based on fuzzy matrix model The Stability Model of Piano Tone Tuning Based on Ordinary Differential Equations Construction and application of automobile user portrait based on k-mean clustering model The Homework Model of Screening English Teaching Courses Based on Fractional Differential Equations Research on a method of completeness index based on complex model Fake online review recognition algorithm and optimisation research based on deep learning Research on the sustainable development and renewal of Macao inner harbour under the background of digitisation Support design of main retracement passage in fully mechanised coal mining face based on numerical simulation Study on the crushing mechanism and parameters of the two-flow crusher Interaction design of financial insurance products under the Era of AIoT Modeling the pathway of breast cancer in the Middle East ARMA analysis of the green innovation technology of core enterprises under the ecosystem – Time series data Image design and interaction technology based on Fourier inverse transform Calculus Logic Function in Integrated Manufacturing Automation of Single Chip Microcomputer Research on China interregional industrial transformation slowdown and influencing factors of industrial transformation based on numerical simulation The medical health venture capital network community structure, information dissemination and the cognitive proximity The Mathematical Analysis Model of Educational System in Music Courses in Colleges and Universities A generative design method of building layout generated by path Analysis of the causes of the influence of the industrial economy on the social economy based on multiple linear regression equation Research of neural network for weld penetration control The Optimization Model of Public Space Design Teaching Reform Based on Fractional Differential Equations Employment and Professional Education Training System of College Graduates Based on the Law of Large Numbers Nonlinear Differential Equations in Preventing Financial Risks Simulation Research of Electrostatic Precipitator Power Supply Voltage Control System Based on Finite Element Differential Equation Research on the effect of generative adversarial network based on wavelet transform hidden Markov model on face creation and classification Research on Lightweight Injection Molding (CAE) and Numerical Simulation Calculate of New Energy Vehicle Demonstration of application program of logistics public information management platform based on fuzzy constrained programming mathematical model The Optimal Application of Lagrangian Mathematical Equations in Computer Data Analysis Research on predictive control of students’ performance in PE classes based on the mathematical model of multiple linear regression equation Beam control method for multi-array antennas based on improved genetic algorithm The influence of X fuzzy mathematical method on basketball tactics scoring Application of regression function model based on panel data in bank resource allocation financial risk management Research on aerobics training posture motion capture based on mathematical similarity matching statistical analysis Limit cycles of a generalised Mathieu differential system Application of Sobolev-Volterra projection and finite element numerical analysis of integral differential equations in modern art design Influence of displacement ventilation on the distribution of pollutant concentrations in livestock housing Research on motion capture of dance training pose based on statistical analysis of mathematical similarity matching Application of data mining in basketball statistics Application of B-theory for numerical method of functional differential equations in the analysis of fair value in financial accounting Research on the influence of fuzzy mathematics simulation model in the development of Wushu market Study on audio-visual family restoration of children with mental disorders based on the mathematical model of fuzzy comprehensive evaluation of differential equation Difference-in-differences test for micro effect of technological finance cooperation pilot in China Application of multi-attribute decision-making methods based on normal random variables in supply chain risk management Exploration on the collaborative relationship between government, industry, and university from the perspective of collaborative innovation The impact of financial repression on manufacturing upgrade based on fractional Fourier transform and probability AtanK-A New SVM Kernel for Classification Validity and reliability analysis of the Chinese version of planned happenstance career inventory based on mathematical statistics Visual positioning system for marine industrial robot assembly based on complex variable function Mechanical behaviour of continuous girder bridge with corrugated steel webs constructed by RW Study of a linear-physical-programming-based approach for web service selection under uncertain service quality A mathematical model of plasmid-carried antibiotic resistance transmission in two types of cells Fractional Differential Equations in the Exploration of Geological and Mineral Construction Burnout of front-line city administrative law-enforcing personnel in new urban development areas: An empirical research in China Enterprise Financial Risk Early Warning System Based on Structural Equation Model Fractional Differential Equations in the Model of Vocational Education and Teaching Practice Environment Image denoising model based on improved fractional calculus mathematical equation The Complexity of Virtual Reality Technology in the Simulation and Modeling of Civil Mathematical Models Calculation and Performance Evaluation of Text Similarity Based on Strong Classification Features Evaluation and Verification of Patent Value Based on Combination Forecasting Model Prediction and Analysis of ChiNext Stock Price Based on Linear and Non-linear Composite Model The Psychological Memory Forgetting Model Based on the Analysis of Linear Differential Equations The Law of Large Numbers in Children's Education Data structure simulation for the reform of the teaching process of university computer courses Calculating university education model based on finite element fractional differential equations and macro-control analysis Educational research on mathematics differential equation to simulate the model of children's mental health prevention and control system Analysis of enterprise management technology and innovation based on multilinear regression model Verifying the validity of the whole person model of mental health education activities in colleges based on differential equation RETRACTION NOTE Research on the mining of ideological and political knowledge elements in college courses based on the combination of LDA model and Apriori algorithm Good congruences on weakly U-abundant semigroups Research on the processing method of multi-source heterogeneous data in the intelligent agriculture cloud platform Internal control index and enterprise growth: An empirical study of Chinese listed-companies in the automobile manufacturing industry Determination of the minimum distance between vibration source and fibre under existing optical vibration signals: a study Nonlinear differential equations based on the B-S-M model in the pricing of derivatives in financial markets Fed-UserPro: A user profile construction method based on federated learning Garment Image Retrieval based on Grab Cut Auto Segmentation and Dominate Color Method Financial Risk Prediction and Analysis Based on Nonlinear Differential Equations Constructivist Learning Method of Ordinary Differential Equations in College Mathematics Teaching Multiple Effects Analysis of Hangzhou Issuing Digital Consumer Coupons Based on Simultaneous Equations of CDM Model Response Model of Teachers’ Psychological Education in Colleges and Universities Based on Nonlinear Finite Element Equations A Hybrid Computational Intelligence Method of Newton's Method and Genetic Algorithm for Solving Compatible Nonlinear Equations Pressure Image Recognition of Lying Positions Based on Multi-feature value Regularized Extreme Learning Algorithm English Intelligent Question Answering System Based on elliptic fitting equation Precision Machining Technology of Jewelry on CNC Machine Tool Based on Mathematical Modeling Computer Vision Communication Technology in Mathematical Modeling Mathematical Statistics Technology in the Educational Grading System of Preschool Students Music Recommendation Index Evaluation Based on Logistic Distribution Fitting Transition Probability Function Children's Educational Curriculum Evaluation Management System in Mathematical Equation Model Query Translation Optimization and Mathematical Modeling for English-Chinese Cross-Language Information Retrieval The Effect of Children’s Innovative Education Courses Based on Fractional Differential Equations Fractional Differential Equations in the Standard Construction Model of the Educational Application of the Internet of Things Optimization in Mathematics Modeling and Processing of New Type Silicate Glass Ceramics MCM of Student’s Physical Health Based on Mathematical Cone Sports health quantification method and system implementation based on multiple thermal physiology simulation Research on visual optimization design of machine–machine interface for mechanical industrial equipment based on nonlinear partial equations Research on identifying psychological health problems of college students by logistic regression model based on data mining Abnormal Behavior of Fractional Differential Equations in Processing Computer Big Data Mathematical Modeling Thoughts and Methods Based on Fractional Differential Equations in Teaching A mathematical model of PCNN for image fusion with non-sampled contourlet transform Nonlinear Differential Equations in Computer-Aided Modeling of Big Data Technology The Uniqueness of Solutions of Fractional Differential Equations in University Mathematics Teaching Based on the Principle of Compression Mapping Financial customer classification by combined model Influence of displacement ventilation on the distribution of pollutant concentrations in livestock housing Recognition of Electrical Control System of Flexible Manipulator Based on Transfer Function Estimation Method Automatic Knowledge Integration Method of English Translation Corpus Based on Kmeans Algorithm Real Estate Economic Development Based on Logarithmic Growth Function Model Financial Crisis Early Warning Model of Listed Companies Based on Fisher Linear Discriminant Analysis 3D Animation Simulation of Computer Fractal and Fractal Technology Combined with Diamond-Square Algorithm The Summation of Series Based on the Laplace Transformation Method in Mathematics Teaching Optimal Solution of the Fractional Differential Equation to Solve the Bending Performance Test of Corroded Reinforced Concrete Beams under Prestressed Fatigue Load Radial Basis Function Neural Network in Vibration Control of Civil Engineering Structure Optimal Model Combination of Cross-border E-commerce Platform Operation Based on Fractional Differential Equations Research on Stability of Time-delay Force Feedback Teleoperation System Based on Scattering Matrix BIM Building HVAC Energy Saving Technology Based on Fractional Differential Equation Human Resource Management Model of Large Companies Based on Mathematical Statistics Equations Data Forecasting of Air-Conditioning Load in Large Shopping Malls Based on Multiple Nonlinear Regression Optimisation of Modelling of Finite Element Differential Equations with Modern Art Design Theory Mathematical function data model analysis and synthesis system based on short-term human movement Human gait modelling and tracking based on motion functionalisation The Control Relationship Between the Enterprise's Electrical Equipment and Mechanical Equipment Based on Graph Theory Financial Accounting Measurement Model Based on Numerical Analysis of Rigid Normal Differential Equation and Rigid Functional Equation Mathematical Modeling and Forecasting of Economic Variables Based on Linear Regression Statistics Nonlinear Differential Equations in Cross-border E-commerce Controlling Return Rate Differential equation model of financial market stability based on Internet big data 3D Mathematical Modeling Technology in Visualized Aerobics Dance Rehearsal System Children’s cognitive function and mental health based on finite element nonlinear mathematical model Fractional Differential Equations in Electronic Information Models BIM Engineering Management Oriented to Curve Equation Model Mathematical Method to Construct the Linear Programming of Football Training The Size of Children's Strollers of Different Ages Based on Ergonomic Mathematics Design Stiffness Calculation of Gear Hydraulic System Based on the Modeling of Nonlinear Dynamics Differential Equations in the Progressive Method Relationship Between Enterprise Talent Management and Performance Based on the Structural Equation Model Method Professional English Translation Corpus Under the Binomial Theorem Coefficient Geometric Tolerance Control Method for Precision Machinery Based on Image Modeling and Novel Saturation Function Retrieval and Characteristic Analysis of Multimedia Tester Based on Bragg Equation Video adaptive watermark embedding and detection algorithm based on phase function equation Evaluation of ecosystem health in Futian mangrove wetland based on the PSR-AHP model Towards more efficient control of the ironmaking blast furnace: modelling gaseous reduction of iron ores in H _{2}-N_{2}atmosphereAlgorithm of overfitting avoidance in CNN based on maximum pooled and weight decay Mathematical Calculus Modeling in Improving the Teaching Performance of Shot Put Application of Nonlinear Differential Equation in Electric Automation Control System Higher Mathematics Teaching Curriculum Model Based on Lagrangian Mathematical Model Optimization of Color Matching Technology in Cultural Industry by Fractional Differential Equations The Marketing of Cross-border E-commerce Enterprises in Foreign Trade Based on the Statistics of Mathematical Probability Theory The Evolution Model of Regional Tourism Economic Development Difference Based on Spatial Variation Function The Inner Relationship between Students' Psychological Factors and Physical Exercise Based on Structural Equation Model (SEM) Fractional Differential Equations in Sports Training in Universities Higher Education Agglomeration Promoting Innovation and Entrepreneurship Based on Spatial Dubin Model