Based on the measured data of 4 steel plates rolled by 200 71 mm rolling mill, the RBF neural network prediction model of stress state coefficient in the rolling deformation zone was established by using the Matlab artificial neural network toolbox. By analyzing the influencing factors of the stress state coefficient and combining with the traditional mathematical model, the input layer parameters of the network are established, and the experimental adjustment of the width coefficient spread in the function newrb() determines the optimal network structure form, which improves the prediction accuracy of the model and the generalization ability of the network. The test results show that the RBF network model has good generalization ability. Compared with the traditional BP neural network model, the results show that the RBF network has higher accuracy and better generalization ability.

Based on the database and information management technology, the information related to measurement equipment, measurement methods and influencing factors of measurement uncertainty assessment management was analyzed, the design method and interface technology of open database were studied, and the basic database of PUMA was constructed. Based on the knowledge of artificial intelligence expert system, the internal regularity of the basic database is analyzed, the relationship between the PUMA application system and the basic database is studied, and the call of the PUMA application system to the basic database according to certain rules is realized.

Support vector machines provide a new way for intelligent diagnosis that is constrained by the lack of a large number of fault samples. The feature vector is extracted from the vibration signal as the input of the support vector machine to identify the rolling bearing failure mode. Experiments show that the support vector machine still has excellent classification performance against rolling bearing failure modes under noisy conditions.

Aiming at the complex situations of uneven terrain, harsh operating environment and serious slippage of the vehicle in the deep-sea cobalt crust, a driven wheel speed measuring mechanism with terrain perception ability is designed and studied, and the trajectory estimation model of mining vehicles operating on non-flat terrain is established by using the method of composite three-dimensional terrain with different slopes at different times. Inclination sensor, electronic compass, angular displacement sensor, photoelectric encoder, etc. are used to measure the dynamic parameters of mining vehicles, and the underwater positioning of mining vehicles is realized according to the trajectory estimation model. Compared with the traditional track estimation method based on the speed of the driving wheel, it can adapt to various complex working conditions and ensure high positioning accuracy. The experimental results prove the effectiveness of the above method.

Aiming at the similarity between the grinding mechanism and the grinding mechanism of abrasive belt, a new high-precision polishing process scheme is proposed. Using new tape sandpaper, the grinding test is carried out by the specimen polishing machine. Research and tests have confirmed that under the action of the same grinding force, because the new tape sandpaper has soft elasticity, multiple abrasive particles, and small particle size, tight and fine arrangement, the heat generation in grinding is small, and no new deformation layer will be produced. The data of the grinding test of Cr12, a common material of mold with ordinary sandpaper and new tape sandpaper, were plotted into a curve, and analyzed and compared to show that the surface accuracy after polishing with the new tape sandpaper was improved by two to three grades compared with the ordinary polishing process, and high fine precision was achieved.

The crane trolley-lifting system has the characteristics of multivariation, nonlinearity and uncertainty of wire rope length, which makes it difficult to control the rocking during the movement of the lifting object. A control method based on adaptive neural fuzzy reasoning system (ANFIS) is proposed to be applied to the stable hook control of cranes, which uses a hybrid algorithm of backpropagation algorithm (BP) and least squares algorithm (LS) to learn the sample data of the trolley-lifting system, adjust the membership function of each variable, and automatically generate fuzzy rules. The simulation results show that this control method has good dynamic performance and strong robustness for the control process of the rocking angle and trolley position of the trolley-lifting system, which shows the effectiveness of the adaptive neural fuzzy reasoning system in the crane steady control.

TCSC impedance control is the basis for realizing other control functions of TCSC, and the system layer control reflects the target parameters of the power system in a timely and effective manner under a certain control strategy. Combining the advantages of nonlinear control and PID control, nonlinear control is used as system layer control and PID control is used as middle layer control, and the controller is designed, and its control strategy adopts local information and does not depend on the accurate model of the system. A two-region four-machine system was built in the Matlab/Simulink simulation environment for simulation. The results show that the controller has a good effect in improving the transient stability of the system.

Based on the node number used for power system calculation, a new multi-smart grid operation ticket expert system is developed. The system directly uses the network wiring topology connection described by the node number to realize the invoicing function, and the system can share a graphical platform with the advanced application software of grid dispatching automation to share the real-time data of the computing network and SCADA system. On this basis, a multi-agent system is established, and the online power flow calculation and real-time wiring analysis are carried out by state estimation, the real-time check of the switch state is realized, and the short circuit calculation is used to prevent misoperation judgment, which improves the correctness of invoicing.

Each parallel branch of the stator side winding of the induction motor is regarded as a branch, and the rotor side is equivalent to two windings perpendicular to each other of the D axis and the Q axis, and the flux linkage equation and voltage equation of the induction motor based on the parallel branch of the winding are established. According to the voltage equation and flux equation of the branch after the fault, the equivalent analog circuit of various winding short-circuit faults is obtained. For a winding breakage fault, the impedance of the winding can be simulated as a considerable number, and finally a 45 kW motor parameter can be simulated.

Through a meso-model, the damage failure mechanism of masonry under monotonic compressive load is analyzed from the meso-level level, the nonlinearity and strain softening of the compressive stress-strain relationship of masonry are explained, and the damage constitutive relationship model when the masonry axis is compressed is established according to the energy principle, a class of damage function expressions is proposed, the stress-strain curve characteristic conditions and the strength value of the standard specimen are used to determine the model parameters, and the stress-strain relationship is only related to the elastic modulus of the peak point secant line of the masonry and the elastic modulus of the origin tangent. This formula can reflect the characteristics of masonry compression test, and the results are in good agreement with the existing compression results.

Due to the shear hysteresis effect and shear deformation, the bending vibration frequency of the box girder tends to have a large error in the calculation according to the primary beam theory. Comprehensively considering the shear deformation and shear hysteresis effect of the box girder, the free vibration of the simple support box girder is analyzed by using the energy variational principle, and the analytical solution of the self-resonance frequency of each order of the simple support box girder considering the shear hysteresis effect and shear deformation is derived, which is generalized compared with the previous vibration fundamental frequency that can only be calculated. The verification example shows that the theoretical derivation of the proposed method is correct, and the calculation accuracy is greatly improved compared with the elementary beam theory. Finally, the effects of shear hysteresis effect and shear deformation on the self-vibration characteristics of box girder are discussed, and it is found that considering the shear hysteresis effect and considering shear deformation reduce the vibration fundamental frequency of simple support box girder, and the reduction of high-order vibration frequency of box girder is particularly obvious. And the width-span ratio of the box girder is a shadow

A device suitable for bridge head compaction-RHIC is proposed, and a dynamic model is established. The compaction effect of high-speed hydraulic tamping machine (RHIC) was experimentally studied, and the relationship curve between the number of rammers and the settlement amount and compaction degree of each layer was obtained. It can be seen from the curve that with the increase of the number of rammers, the settlement of each layer also increases rapidly, and the total settlement is the largest when the ramming is 15 times. When ramming 12 times, the overall compaction degree is high, the surface compaction degree is 95%, and the average compaction degree can reach 93%, which basically meets the construction requirements of 1.5 m backfill compaction real-time, indicating that the high-speed hydraulic tamping machine (RHIC) is suitable for bridge abutment compaction, with good tamping effect and deep impact.

Pasting prestressed fiber reinforced composite (FRP) sheets to reinforce and repair civil building structures can improve engineering efficiency. Starting from the theoretical analysis, the calculation formula of the interface layer of the prestressed FRP sheet reinforced RC beam is derived, the shear stress distribution of the interface layer between FRP sheet and concrete under prestress is analyzed, and the carbon fiber sheet (CFL) reinforced RC beam is verified by numerical experiment by finite element. The effects of initial prestress, FRP sheet thickness and interfacial layer thickness on interfacial shear stress were discussed.

The principles of cast-in-place reinforced concrete hollow beamless building structure system, the design principle of side support hollow building cover, and the stiffness calculation were introduced. According to the provisions of CECS175[1], "when the elastic stiffness difference between the two directions of hollow floor slab in the straight cylinder and horizontal cylinder does not exceed 10%, the anisotropy of the floor slab can be ignored, and the same internal force analysis method as the ordinary solid building cover is taken", the implementation of the side support building cover design in PKPM software is analyzed and explored, and the design ideas and methods that can be calculated as equal thick solid slabs in the PKPM software are proposed, and relevant tables are drawn for the designer’s reference.

Through the study of the flexural test of steel fiber concrete (SFRC) on 30 specimens in 90 groups, the influence of two different types and volume rates of steel fibers on the flexural strength of concrete is discussed, and the relationship between SFRC flexural strength, compressive strength and splitting strength is obtained, which provides reference for the application of bridge deck paving engineering of Nanyang Expressway. The results show that with the increase of steel fiber volume ratio, the flexural strength of SFRC also increases linearly, and the ratio of flexural strength to compressive strength also increases. The flexural strength of SFRC increased with the increase of splitting strength, but with the increase of steel fiber volume rate, the ratio of flexural strength to splitting strength of SFRC showed a downward trend.

In order to improve the problems of insufficient design life and short actual service life of existing pavement, starting from the research of long-life pavement, the definition and design requirements of long-life pavement were discussed, combined with the PCC+AC long-life pavement structure relying on the project, using the theory of finite element and pavement elastic layered system, the mechanical model of PCC+AC long-life pavement was analyzed and determined, the load stress and temperature stress at the bottom of the PCC plate were calculated and analyzed, and the pavement service life was estimated, and the theoretical service life reached more than 40 years. Its life is in line with the design idea of long-life pavement. Finally, in order to enhance the adhesion between cement concrete and asphalt concrete, the bare time and technical requirements of cement concrete slab are studied.

In order to understand the effect of geocell in treating the widening joint of highway, so that the widened part of the embankment and the existing road are more closely connected to form a whole, and the uneven settlement of the new and old embankment is reduced, finite element analysis is applied to analyze the lateral displacement, vertical settlement and maximum differential settlement of each key point on the top surface of the subgrade when the geocell is laid at different levels at the junction of the new and old roadbed. The results show that the laying of geocell can reduce the lateral displacement and differential settlement of the subgrade, and the effect is best when laid on the foundation and the top, which can improve the overall stiffness and bearing capacity of the subgrade.

Bridge damage assessment is an important part of highway maintenance management. Based on the research results of previous people, the author organically combines the WBS method, the concept of damage degree and the principle of fuzzy assessment, establishes a comprehensive assessment model of bridge structure damage degree based on WBS, and gives the specific calculation steps for applying the model. The model has clear concepts, systematic and organized, simple calculation, and the conclusions obtained are more in line with engineering reality and facilitate the scientific formulation of engineering decisions.

Based on the research results at home and abroad, reasonable and feasible conditions such as specimen size, failure criterion, control mode, loading frequency and test temperature in the direct tensile fatigue test of asphalt mixture are proposed. Based on the fatigue test results of different strain levels, the average stress influence is analyzed, and the strain-life fatigue equation of asphalt mixture is established, which can be used as the basis for estimating the fatigue cracking life, and the threshold value and limit value of fatigue cracking tensile strain of asphalt mixture are proposed. The strain-life fatigue equation obtained by direct tensile fatigue test of asphalt mixture can better reflect the fatigue characteristics of asphalt mixture, and the threshold and limit values of fatigue cracking tensile strain can fully reflect the fatigue failure process of asphalt mixture.

In view of the large difference in the performance of semi-rigid materials paved in different seasons, and the design index - modulus cannot be determined in combination with the actual application conditions, resulting in deviation in structural design, the modulus change characteristics of cement gravel, cement fly ash gravel and dilime gravel under different temperature conditions are studied. By establishing the relationship between the temperature product and the modulus growth rate of the above three types of mixtures, combined with the 10-year climate survey data of a certain place in Hebei, the modulus standards of the above three materials based on different temperature products are quantitatively recommended, and the relationship between indoor test results and practical application is closer, and the research results and methods can be used for reference in other regions.

Taking the radius of curvature, thickness, number of symmetrical sector surfaces, number of layers and member cross-sectional area of the grid shell as the design variables, the structural optimization design of the double-layer Kiewitt spherical grid shell with the total cost as the goal shows that the total cost is reduced by 22.36%, which is significantly more effective than the common optimization of the cross-sectional size of the component (the total cost is reduced by 8.50%).

The fuzzy mathematical method was applied to the evaluation and prediction of loess collapsibility, and the information diffusion principle in the fuzzy information optimization processing method was used to collect 60 sets of experimental data of loess collapsibility, and the fuzzy relationship between pore ratio and water content and collapsibility coefficient was selected to obtain the corresponding mathematical model for collapsibility evaluation. The model is applied to verify 10 groups of non-parent data, which has small error and good effect, and the method can be well applied to practical engineering.

The structure of a Web-based embedded network monitoring system is proposed, and the system is designed and implemented using the technology and object-oriented thinking of ActiveX control, and the design of IPCam control is described in detail. The architecture of the system is more versatile than the current PC-based video surveillance system. The design of the system client software is based on the technology of ActiveX control, which has good easy upgradeability.

The initial powder of electrolyte and electrode material of medium-temperature solid oxide fuel cell was synthesized by the method of combustion synthesis-citric acid-nitrate. The electrolyte material of the battery is Ce0.8Gd0.2O1.95(GDC), the cathode material is La0.7Sr0.3Co0.3Fe0.7O3(LSCF), and the anode material before reduction is NiO doped with Ce0.8Sm0.2O1.9(SDC). The crystal structure and reaction process of the material were analyzed by XRD and TG-DTA. Citric acid-nitrate combustion synthesis method can prepare nanoscale electrolyte and initial powder of electrode material, and the size of pH value and sintering temperature after synthesis in combustion synthesis can greatly affect the growth of grains and phase generation

The mineralization of organic nitrogen in the river sedimentary layer has a great impact on the groundwater environment, and there are many factors affecting mineralization, mainly including environmental conditions, clay content, etc. The results show that the richer the organic matter content in the percolation system, the more nitrogen mineralized by organic nitrogen in the system.

In order to overcome the shortcomings of traditional BP networks, a water quality evaluation model based on AdaBoost-NN is proposed by combining AdaBoost with neural networks. The results show that the AdaBoost-NN water quality evaluation model effectively compensates for the shortcomings of the BP model, has higher evaluation accuracy, and the results are more objective and reasonable.

Aiming at the common multi-map digital map logic splicing in the process of geographic information system map digitization and the spatial logic error problems that are easy to occur after digitization, an ArcGIS-based digital map logic stitching and spatial logic error checking method is proposed, which realizes the multi-map digital map logic stitching in the real sense, and is applied in the basic geographic information management system of Henan Province, and achieves ideal results.

Using the computational fluid dynamics software FLUENT6.2, the flow of the disc turbine stirring tank at different speeds was carried out by the multiple reference frame method. The flow distribution in the stirring tank was successfully simulated by using the standard K-ε turbulence model, and the power accuracy of the mixing paddle under different stirring speeds and different calculation methods was investigated. The velocity distribution and turbulent flow energy distribution in the stirring tank are given. Provide guidance to researchers in the field.

With the increase of postdoctoral stations, while appropriately controlling the development speed, the stationing units are required to strengthen management and improve the quality of postdoctoral recruitment and training, so organize the inspection and evaluation of each stationed unit. Mainly based on the postdoctoral management information system established by the existing Ministry of Personnel, the development idea of the network evaluation module of the postdoctoral evaluation system is proposed, the network structure of the evaluation implementation is constructed, and the effective evaluation of the station-setting unit is carried out more scientifically with the help of the platform of the postdoctoral management information system.