Based on experimental research, combined with the bending failure characteristics of fiber-reinforced plastic reinforced concrete beams, the numerical analysis method of the whole process of non-linear reinforced concrete beams of fiber-reinforced plastic reinforced concrete beams was discussed. By simplifying the stress-strain relationship curves of concrete in the compression zone and the tensile zone, the calculation mode of the curvature of the bending curve of the fiber-reinforced plastic reinforced concrete beam is established, and the simplified calculation formula of the curvature of the bending of the fiber-reinforced concrete beam and the corresponding load deflection are proposed. The simplified method, the nonlinear whole process numerical analysis method and the experimental data were compared and analyzed, and the three were in good agreement.

The plate free vibration shape must have orthogonality, and the expression of the free rectangular plate vibration function expression of the three-sided support side can meet the vibration differential equation and all boundary conditions by using the main vibration direction ordering method, and has the orthogonality of the mode shape. The number of vibration waveforms in this shape curve is unique in the direction of the main oscillation and not unique in the other direction, and the shape of the shape curve conforms to the deformation form that can be defined by the boundary conditions of the plate. By proving the existence of mode shape orthogonality, analyzing the structural form of the mode function expression, deriving the frequency equation of rectangular plates with different boundary conditions, calculating the self-resonance frequency of the plate and the corresponding mode shape, and comparing it with the results of predecessors, the correctness of the method is theoretically explained.

In view of the shortcomings of the current regulations in the stability design of lightweight portal rigid frame steel structure, the overall stability study in the plane was carried out by the finite element method. The calculation length coefficient of the overall stability of the non-side-shifting rigid frame is proposed, the overall stability of the lightweight portal rigid frame structure under asymmetry is discussed, the influence of the main bending moment on the lightweight portal rigid frame is studied, and the calculation formula of the overall stability in the plane of the lightweight portal rigid frame is given. The research results can be used as a reference for the stable design of lightweight portal rigid frame steel structure.

A realistic hyperbolic model is used to describe the nonlinear interaction between soil and cement-soil retaining wall, and assuming that the wall is rigid, and considering the weight of the wall and the shear and overturning resistance of the subsoil, a nonlinear equation system representing equilibrium is obtained. When solved, it is converted into extreme points for extreme value problems. The results show that the horizontal displacement of the hyperbolic model and the linear model are basically similar with the excavation depth, but the results of the hyperbola model are greater, and with the increase of the excavation depth of the foundation pit, the difference in the soil pressure distribution calculated by the two models is increasing, that is, the influence of soil nonlinearity is becoming more and more significant.

Taking the orbital system under moving load as the research object, the method of track-sleeper-gravel cushion synergy analysis was adopted to simplify the rail system into an elastic foundation beam model, and its dynamic characteristics were analyzed through the calculation of response spectrum and dynamic response. The results show that the critical speed when considering synergy is significantly lower than when not considering synergy, and the critical speed decreases with the increase of the initial frequency. The maximum response of the track always occurs at the observation point (t=0) when the train is running, and it increases with the increase of soil thickness.

The crack problem of the free side semiplane parallel to the interface was studied. According to the basic solution of elasticity of free-edge semiplanar elastomer, the super-singular integral equation system describing the problem is obtained by using the work exchange law, displacement-strain relationship, Hooke’s law and crack-shore stress boundary conditions, and the corresponding numerical method is established in the sense of finite partial integral through integral transformation. The example of the average distribution force on the crack surface shows that near the free edge, even if the normal force or tangential force is applied separately on the crack surface, the stress intensity factors of type I and II also exist at the same time and change drastically.

Carotenoids have a variety of biological effects, including inhibiting cancer and preventing aging, and reducing the occurrence of some diseases. One of the important reasons for this is their biological antioxidant properties: quenching 1O2, scavenging free radicals, inhibiting lipid peroxidation and antioxidant effects of cellular respiration bursts. The quenching effect of 2O2 was studied by luminescence method of 1O2 generated by H1O2-NaOCl system, the reaction with CCl3OO@ by pulse irradiation method was used to determine the formation of methyl linoleate hydroperoxide triggered by free radicals and the formation of thiobarbituric acid reactants in liposomal peroxidation products, and the effect on macrophage respiratory bursts was studied by chemiluminescence and cell-free mimicry system relying on luminol. Studies have shown that carotenoids quench 1O2 through physical processes, with CCl3OO @

The mechanism and influencing factors of thermal decomposition of ammonium nitrate between 100~150 °C were studied, and the effects of substances and stabilizers that activated the system were quantitatively analyzed. The results show that moisture, nitric acid, sulfuric acid and phosphoric acid can reduce the thermal stability of the system, and its mass content of 0.5% can shorten the induction period of ammonium nitrate by more than 50%. The addition of 3% zinc oxide and aluminum hydroxide can effectively inhibit the decomposition reaction; For calcium carbonate and potassium chloride, the decomposition reaction is no longer carried out only when the mass content reaches 15%; Urea is a good ammonium nitrate stabilizer, which can inhibit the decomposition reaction at 130 °C at 1% content.

Ultraviolet light and lithium chloride were used to mutagenesis of Monosporus fernosporus, and one strain with high viscosity and gum yield ZG-1 was screened from the mutagenic strains.At the same time, the formula of fermentation medium was determined by orthogonal tests using this strain: starch 1%, sucrose 2%, peptone 2.0%, soybean cake flour 3.0%, CaCO2, 3.0%, citric acid 3.0%.The test results showed that the viscosity and gum yield of the final fermentation broth of the strain increased from 1.4 Pa*s and 5.1% Increased to 99.12 Pa*s and 28.3%.

Taking phosphorus-containing wastewater as the research system, the process conditions of removing phosphorus from water with magnesium chloride and ammonium bicarbonate as composite precipitants were studied. The process retains the characteristics of high elasticity, high phosphorus removal efficiency and simple operation by chemical precipitation method, and the generated MgNH4PO4*6H2O crystallization is large and easy to filter. The optimal process conditions in this phosphorus removal system are: the pH value of the initial solution is 9.4, the amount of precipitant added is [NH4+]/[P]=1, [Mg2+]/[P]=1.3 (molar ratio).

The level of electromagnetic interference (EMI) is related to the application of switch-mode power supply, and reducing the electromagnetic interference (EMI) level of switch-mode power supply is a hot issue in current research. Starting from the inherent chaotic phenomenon in switch-mode power converters, the idea of applying parameter combination control to change the working state to reduce the level of electromagnetic interference is proposed. Furthermore, the DC/DC Boost converter was used as the object to carry out computer simulation analysis. By adjusting the size of the parameters Iref, k and Vref, the transformer runs in periodic, quasi-periodic and chaotic modes, respectively. The simulation results show that the electromagnetic interference level of switch-mode power supply can be reduced without attaching any peripheral circuits by using the inherent chaos phenomenon in the switch-mode power supply.

In order to compare the selection of sample points required for training artificial neural networks, the random traversal method, orthogonal design method and uniform design method are used to generate sample points for training neural networks. The analysis results show that under the same number of sample points, the uniform design method is the best representative, followed by the orthogonal design method, and the random traversal method is poor. The random traversal method can also improve its representativeness with the increase of the number of sample points. When the function varies less with the variable in the interval (less factor level can be taken), the orthogonal design method is also a good choice. The uniform design method can better reflect its superiority in the case of multiple variables and each variable needs to select a larger number of levels.

In large-scale nonlinear digital models, with the help of interactive visual computing technology, with buoyancy jet numerical simulation as the engineering application background, QuickWin applications are developed in Visual Fortran, using its graphics library to design interface elements and draw graphics, and creating multi-threaded applications as a breakthrough, so that calculations and drawings are carried out in a separate thread in addition to the main thread, and the main thread is specially used to respond to the events generated by the controls in the window. The results show that interactive visual computing technology can be implemented in the Visual Fortran environment.

The convenient and effective establishment of terrain model and its texture is the focus of terrain landscape research. By using the method of establishing terrain landscape based on bitmap, the mapping relationship between the gray value in the bitmap and the terrain elevation is established, and the smooth terrain model is automatically created by combining image processing technology, and the texture that can express a variety of surface features can be automatically generated, and finally the terrain landscape with realistic effect is generated. This method is simple and convenient, and can be built and modified as you like, and is suitable for game production, virtual scene construction, and other fields.

The boron infiltration problem of 4Cr13 stainless steel was solved by adding rare earth compounds and optimizing the process parameters. The boronizing process of 4Cr13 steel obtained by orthogonal test method was: temperature 920 °C, time 8 h, and the optimal rare earth addition amount was 0.5% (mass fraction). The results showed that after the addition of rare earth elements, the thickness of the permeable layer increased, the micromorphology and density of boride were significantly improved, the predominant tissues of Fe2B and (Fe, Cr)2B were obtained on the surface, and the brittleness of the permeable layer decreased.

Although the Morkworth model can predict the nonisothermal oxidation kinetic process of metals in industrial production, the mathematical processing is very complicated when the temperature-time relationship is nonlinear. A numerical model for predicting non-isothermal oxidation kinetics by isothermal oxidation kinetic parameters is proposed, which has clear physical significance and is easier to deal with the problem of nonlinear oxidation with temperature-time relationship than the Markworth model. The experimental results show that the prediction results of this numerical model are consistent with the experimental results.

BaTiO3 series PTCR components are an electronic device that has developed rapidly in recent years, and high-quality PTCR raw material powder determines the performance of the device to a certain extent. The characteristics of rutile and anatase were studied and analyzed, and the relationship between the phase transition expansion of BaTiO3-based dielectric materials and the temperature coefficient αT of the corresponding PTCR materials was discussed. The effect of TiO2 powder of two crystal forms on the temperature coefficient of BaTiO3 PTCR was obtained, and it was pointed out that the high temperature treatment of TiO900 powder at 1100~2 °C to complete the crystal form transformation from anatase to rutile was conducive to obtaining PTCR samples with high temperature coefficient.

The nickel-based alloy was clad on the surface of the Q235 matrix by hot plasma arc cladding method, and the structure and formation reasons of the alloy were analyzed, and the interface between the cladding layer and the matrix was studied. The test shows that the cladding layer has good wear resistance. It is pointed out that the main reason is the formation of a large number of high-strength and tough nickel-based solid solutions and wear-resistant hard phases and the contribution of fine tissues formed on the surface to the wear resistance, and the wear resistance mechanism is analyzed from many aspects.

Using the Pushover method, through a large number of Monte Carlo stochastic simulation analysis, the failure correlation problem of frame structure under earthquake action was studied, and the failure law and correlation law of frame beam under the conditions of small earthquake and strong column and weak beam were obtained. The possible failure parts of the frame structure under the condition of small earthquake and strong column and weak beam are analyzed, and it is pointed out that the failure correlation between the constraints is negligible in the case of small earthquake and strong column and weak beam, which verifies the correctness of the conclusion that "the failure of the cross-section constraint of the frame structure under the small earthquake obeys the assumption of failure independence".

Through the test of four HRB4 reinforced concrete two-span continuous beams, the failure morphology and deformation characteristics of the specimens were observed, and the test results were discussed and analyzed, and the plastic internal force redistribution characteristics of this structure were studied. The experimental results show that the HRB400 reinforced concrete two-span continuous beam can achieve complete bending moment redistribution, and has sufficient amplitude modulation capacity to achieve the designed amplitude modulation coefficient. This paper proposes that the crack width should be used as the control condition for the amplitude modulation of the bending moment of this structure.

Henan Coal Mine is a large water mining area in China, and the groundwater in the goaf area is serious. Through the comprehensive analysis of the water chemical environment, water chemical characteristics and water chemical causes of acid old kiln in coal mines in Henan Province, the principle of treating acid water in mines by chemical desulfurization technology and the use of synthetic coagulant were proposed, and the corresponding process parameters were derived. That is, the weight ratio of calcium hydroxide and tetracalcium ferroaluminate in the synthetic coagulant is 1:1.3~1:1.5; The quicklime input can be appropriately reduced by 10 mg/L for every 50 °C increase in the water temperature of acid old kiln. For each unit increase in pH value, the quicklime dosage decreases by 25 mg/L. Practice has proved that it is feasible to treat mine water with the above physicochemical methods and process parameters.

In view of the specific conditions of serious electromagnetic interference, harsh environment, complex installation conditions, large data communication and strict requirements for the timeliness of data processing, according to the basic principle of cyclic redundancy check code (CRC), a table drive algorithm is designed to realize cyclic redundancy verification. The algorithm is implemented in the central processor with Delph 4.0 macro assembly and in the front end machine with MCS-51 microcontroller assembly language, and the two are portable to each other. Due to the software implementation of CRC’s table-driven algorithm, the system does not need to design additional hardware circuits, which reduces the cost, reduces the equipment installation size, verifies very quickly, and improves the communication speed and message transmission accuracy of the remote monitoring network.

In view of the shortcomings of traditional code programming languages such as C++, the signal analysis and control functional modules provided in the LabVIEW programming environment are used to realize the sharing of code and resources of C++ language and LabVIEW 6i by using dynamic link library (DLL) technology, and a signal analysis system in the C++ Builder environment is developed. Practice has proved that the development of signal analysis system based on LabVIEW dynamic link library is more efficient and easy.

Combined with the needs and characteristics of electric energy metering management of power companies, the design ideas, principles, energy metering management processes and functions of the electric energy metering management information system are analyzed, and PowerBuilder 8.0 and SQL SERVER 7.0 are used as development tools to establish the conceptual model of the server-side SQL SERVER 7.0 database, and the conceptual model is transformed into a data model to develop and implement the client application. The system has perfect functions, simple and convenient operation, safe and reliable operation.

According to the basic idea of data mining technology for fault diagnosis, rough sets are used to summarize data, filter redundant attributes in a large number of fault data, and obtain a simplified fault data set. Then, the decision tree classification method is used to process the refined dataset, and the rules required for classification are generated for classification, and the working steps of the method are illustrated with examples. The feasibility of this method for fault diagnosis can be seen from the examples, and finally some technical problems in the actual application process are pointed out.