This paper proposes to use the FENE bead-reed chain molecular model to describe the microstructure of the polymer, introduces the molecular Brown kinetic simulation method, simulates the changes of the molecular chain of the polymer dilute solution at different times under the shear flow field, calculates the magnitude of the stress during the polymer flow process at different times, considers the changes of different shear rates and the stress of the molecular chain in different regions, calculates the molecular chain shape control equation in the flow process by semi-implicit prediction correction method, and solves the nonlinear equation system by Newtonian iterative method.

In order to explore the effect of synthetic polymer fibers on the water resistance of asphalt mixture, the optimal amount of fiber was determined by Marshall test and rutting test, and then the improvement effect of synthetic polymer fiber on the water resistance of asphalt mixture was evaluated according to the water-immersion Marshall test and freeze-thaw splitting test specified in the current standard JTG F40-2004. The test results showed that the residual stability of polyester fiber brood and polyacrylonitrile fiber brood on asphalt mixture was increased by 4.4% and 7.8%, respectively. Under 50 and 75 compaction times, the freeze-thaw splitting strength ratio of polyester fiber to asphalt mixture increased by 4.5% and 3.1%, respectively. Polyacrylonitrile fiber increased by 6.9% and 8.6%, respectively.

According to the characteristics of polymer fiber modified Superpave mixture, through the Marshall test, water stability and high temperature dynamic stability test of Superpave asphalt mixture modified with different amounts of polyester fiber, comprehensive engineering economy, the appropriate fiber dose was determined to be 1.5‰. Polyester modified Superpave mixtures are suitable for paving in old road coverings. Finally, a reasonable construction process is proposed; The water permeability test shows that this kind of mixture should strengthen the construction compaction.

In order to study the crosslinking structure and stability of SBS in modified asphalt. The transformation process of SBS crosslinked structure was studied by gel permeation chromatography (GPC) and compared with the fluorescence microscopy results. The results showed that the GPC analysis conclusion was consistent with fluorescence microscopy, which proved that it could effectively characterize the SBS crosslinked structure. During the processing of modified asphalt, the average molecular weight of SBS increased to form a cross-linked structure, and SBS species and asphalt species had different degrees of influence on the crosslinking of SBS. A small amount of SBS cross-linked structure was degraded after the rotating film oven aging test (RTFOT), but it still had a good modification effect on asphalt.

Through the pull-out test of 54 prestressed spiral steel bars (referred to as PC steel bars) bonding anchoring specimens, the bonding and anchoring characteristics of PC steel bars and the main factors affecting the bonding strength were analyzed, and the calculation formula of bonding strength was given on the basis of statistical regression, and the anchorage length calculation formula of PC steel bars was proposed according to the current < concrete structure design code > (GB50010-2002).

The joint solution method of Boussinesq and Geddes solution is used to obtain the distribution of additional stresses at any depth in the composite foundation considering the pile top and the soil top load between piles in the composite foundation. And according to the settlement relationship of flexible pile, interpile soil and composite foundation. The effective pile length calculation method of flexible pile composite foundation with cushion is obtained. The comparison of test and calculation results shows that the effective pile length calculation results are consistent with the actual situation of the composite foundation due to the influence of soil top pressure between piles and the deformation of pile penetration amount on the effective pile length of the composite foundation.

In order to study the seismic performance of honeycomb copper beam-welded ring stirrup concrete column joints, the quasi-static test of beam and column joints of four different connection forms of honeycomb steel beam-welded ring stirrup concrete columns was subjected to low-cycle repeated planting, and the failure form, bearing capacity, ductility and hysteresis characteristics of their joints under simulated earthquake action were analyzed, and the seismic performance of honeycomb steel beam-welded ring stirrup concrete columns was preliminarily discussed. The test results show that the reasonable honeycomb steel beam-welded ring stirrup concrete column joint can meet the practical requirements of seismic engineering, and through the analysis and comparison of the force performance of nodes in different connection forms, the combined joint connection form that meets the requirements of seismic design is finally obtained.

For a steel structure workshop, when the main body of the superstructure is completed, it is found that the concrete strength of the reinforced concrete independent foundation under the steel column is less than C10, and the scheme of steel structure reinforcement foundation is designed and calculated, so that the planting capacity of the foundation meets the requirements, and the construction method and sequence are studied and discussed. The reinforced concrete independent foundation not only meets the strength requirements, but also has fast construction speed and simple method, and the original concrete disturbance is minimal, which achieves the expected purpose. The design and construction scheme can be used as a reference for similar engineering reinforcement treatment.

The effects of metakaolin, water glass type and modulus, alkali content and conservation conditions on the synthesis of geopolymers obtained from kaolin from different sources under different calcination conditions were studied. The results showed that a certain Suzhou kaolin had the best activity after calcination at 800°C for 6 h, that is, the dissolution rate of silicon aluminum was the largest in lye. When the water glass modulus was 1.4 and the alkali content was 10%, the prepared geological polymer was cured for 20 days at 90°C (relative humidity greater than 28%), and its compressive strength reached 82.5 MPa.

The dynamic characteristics of the fluid structure coupling system of steam generator (SG) U-tube were numerically simulated using ANSYS parametric design language, and the influence of anti-vibration strip on the natural frequency of U-tube was considered. The intrinsic vibration characteristics of U-shaped tubes in air and water are compared, and semi-empirical formulas are given by statistical regression.

Nano ZnO has good physical and chemical properties, and has broad development and application prospects in piezoelectric materials, optoelectronic materials, sensors, ceramic materials, catalytic materials and other fields. Anti-glue cluster microemulsion method is a new type of liquid phase preparation of nanoparticles, which uses a unique microreactor to prepare nanoparticles, which has the properties of simple process, good product dispersion, controllable particle size, and can be coated with different surface active wattles to modify products. The method and principle of preparing nano-ZnO by microemulsion method and the influence of changing the preparation parameters on the size of ZnO particles are introduced.

The pH value of the plating bath was adjusted with caustic soda, and the process conditions for electroless plating of Ni-co-P alloy on the aluminum matrix were preliminarily determined by orthogonal test: the temperature was 85 °C, and the boric acid was 5 g· L-1,c(H2PO2-)/c(Ni2+Co2+) molar ratio 3, c(Ni2+)/c(Co2+) molar ratio 2, complexing agent 170 g· L-1, complexing agent 215 g· L-1, accelerator 8 g· The L-1PH value was 8.5.4 factors with significant influence on the plating speed were found through range analysis.

In order to accurately understand the crushing process of the needle-disc mill, the gas phase (RNG) k-ε two-way path model is used, and the particle phase is based on random particle orbital model. The numerical study of gas-solid two-phase flow of needle disc mill was carried out, and the particle orbit model was accurately defined by considering the three influencing factors of particle force, turbulent diffusion and particle size distribution. The simulation results show that under the high-speed impact of the rotor pin rod, a reflux will be formed near the stator area, which is conducive to the re-crushing of particles. The small stator and rotor circumferential clearance and radial clearance are also conducive to the multiple crushing of particles; The angle between the rotor blade and the radial direction is reduced, which is conducive to discharging. This study is helpful for the analysis of the performance of the needle disc mill and the optimization of structure and process parameters.

In view of the large variation of boiler combustion conditions, the main steam pressure object model is uncertain, and it is difficult for conventional control methods to obtain the expected control effect. In order to improve the control quality, the H∞ mixing sensitivity method is used to design a robust controller for steam pressure, and SPEA2 (Strength Pareto Evolutionary Algorithm 2) is used to optimize the weighted array parameters to find a controller that meets the performance requirements of both frequency domain and time domain. The simulation results show that the designed main steam pressure control system has good robustness and dynamic quality, and avoids the traditional test stack.

The simulated tree growth algorithm is applied to the reactive power optimization of the sub-power system, which is convenient for the processing of the objective function and constraints, and does not need to give many optimization parameters. A mathematical model of reactive power optimization is established, and the application of variable step size and optimal solution retention strategy improves the global optimization ability and optimization speed of the algorithm. The computational analysis results of IEEE 30-node system show that the simulated tree growth algorithm has strong convergence stability, which is a feasible and effective method to deal with reactive power optimization problems.

In order to measure the vibration caused by random fluctuation speed superimposed on the constant speed, the dynamic characteristics of the rolling mill drive system were studied by the speed fluctuation of the elastic rotating shaft and the motor shaft, and the measurement model of the instantaneous speed of the rolling mill drive system was established. The series decoupling method is used to convert the nonlinear motion differential equation into an algebraic equation to obtain a fast decomposition algebraic algorithm for speed fluctuations, and finally the correctness and feasibility of the algorithm are verified by the experiment of simulating the rolling process on the torsional vibration experimental platform.

The current highway route design cannot directly reflect the overall design effect of the highway, and it is difficult to make a scientific evaluation of the route design results. A method for three-dimensional modeling of highway routes using ArcGIS is proposed: a linear reference system is established under ArcGIS to correlate the route station with its M value. On this basis, the elevation model of the route is established, and the elevation value is associated with its Z value. Finally, using the relevant interfaces and methods of ArcObjects, MultiPatch, a 3D model of the route suitable for the characteristics of the highway is established.

In order to meet the needs of multiple fields in the comprehensive management of large regional control points, realize data sharing, and face problems such as coordinate system, attribute structure, projection belt, administrative district, image overlap area, etc., a case study established by the provincial control point graphic image database is adopted. The provincial control point graphic image database stores the attributes, spatial location, graphic images and other information of the control point, and superimposes the administrative jurisdiction, original image, joint chart, projection belt and other information, providing valuable data and experience for the development of the national secondary land survey.

Based on the traditional CORDIC algorithm, an improved algorithm is proposed, and then a hybrid algorithm is given to realize the operation of sine and cosine functions. Without affecting the data accuracy requirements, the algorithm can not only reduce the number of iterations and the required ROM storage space, but also facilitate the pipeline design of the structure, reduce the clock cycle of the system, and improve the speed. Finally, it was implemented on Altera’s Cyclone series of chips EP1C3T100C6. The simulation results show that this algorithm has the advantages of high operation speed and low resources compared with traditional algorithms, and the maximum working frequency can reach 184.77 MHz, which is 11.84% higher than that of traditional algorithms, and saves nearly 17.35% of hardware resources compared with traditional CORDIC algorithms.

Using bus line intersections as apex points, the calculation of complex network topology maps by traditional algorithms is simplified. At the same time, based on passengers’ travel preferences, the line network density is introduced to evaluate the convenience of passengers, and a shortest path fast search algorithm is proposed. Experiments show that compared with the traditional algorithm, the proposed algorithm significantly improves the path search efficiency.

The elastic coefficient method is a widely used water demand prediction method, and the key step of modeling is to extract reasonable water demand influencing factors. In order to effectively extract the main influencing factors of water demand, the grey correlation method was used to analyze the relationship between elastic coefficient model variables. A natural logarithmic pretreatment method is proposed, and the forecast of domestic water demand in Zhengzhou City is taken as an example to compare and analyze the methods. The results show that the method is reasonable and effective. The application of grey correlation analysis is further enriched. The water demand prediction results are also in line with the actual situation, which can provide a reference basis for Zhengzhou water resources planning.

Under the SO2-O2-N2-H2O(g) system and kinetic control conditions, the process of SO2 removal in the presence of H2O(g) by self-made active semi-joke was investigated. The experimental results show that the change of water vapor concentration affects the adsorption rate and desulfurization rate. The presence of water vapor promotes the dissolution of sulfuric acid in the adsorbed state on the active site; The rate control steps of the adsorption conversion process may be H2O+*→H2O*.

Two composite coagulants are used: polyaluminum chloride (PAC) and polyacrylamide (PAM) and ferrous sulfate and polyacrylamide. The removal effect of COD and SS from lincolmycin wastewater was experimentally studied under different pH values and dosages. The test results show that PAC+PAM has a good removal rate compared with ferrous sulfate+PAM when the pH value is 2 and the dosage is 12 mg/L. And the removal rate reached the maximum; The removal rates of COD and SS were 300.22% and 05.32%, respectively.The coagulation precipitation method could be used as the pretreatment unit of lincolmycin wastewater biological treatment system to reduce the pollutant concentration in wastewater. Reduce the load of biological treatment.

Based on the analysis of the planning and land use status of rail transit network in Changsha, the experience of cities with relatively successful urban rail transit development is learned. Adhering to the principle of synchronous planning and sustainable development of rail transit and land use, the principles that should be followed in the coordinated development of rail transit and sustainable land use in Changsha and the selection of the relationship mode between rail transit and sustainable land use in Changsha are put forward. Through the above analysis, it is decided to take the rail transit construction as an opportunity to further guide the transformation of Changsha’s land use policy, and finally achieve the purpose of harmonious integration of rail transit and land use in Changsha.

The fast multipole expansion method is applied to discretize the boundary equation of the three-dimensional potential problem. Since the basic solution of the boundary equation contains the singular term 1/r, which affects the application of multipolar expansion (FMM), the Laplace transform can be converted into an exponential form sequence. This method avoids the singularity of multipolar expansion, obtains a new discrete analytic formula, and provides a new method for theoretical analysis of multipolar boundary elements.

Five copolymers containing homotetraluene, p-dihexyloxybenzene, anthracene, fluorene, N-ethylcarbazole and trans-pstyrene were prepared by oxidative coupling polymerization. The 5H NMR spectra of these copolymers were tested, and the 1H NMR signals of other monomers were attributed by using the special structure of homotetraluene, focusing on the connection mode of these aromatic molecules in oxidative coupling polymerization. The conclusion is basically consistent with the oxidative coupling polymerization mechanism.

In order to solve the problem that vanillin and its Schiff base ligand are easily oxidized in air, the author breaks the conventional idea of step-by-step synthesis of Schiff base complex, and synthesizes the copper complex of L-lysine vanillin Sehiff base by drop-by-drop reaction method, and the product yield is about 62%.The product was characterized by elemental analysis, infrared spectroscopy, ultraviolet spectroscopy and other methods, and it was speculated that its possible structure was a four-core cyclic structure complex with the molecular formula C40H68Cu4N8O12·2H2O.

Through field field tests, the dynamic strain response of each layer of asphalt pavement under the load of moving vehicles was detected. The influence of vehicle speed on the dynamic response of asphalt pavement structure was studied by using the kinetic strain at the bottom of the surface layer to analyze the object. The results show that the dynamic strain at the bottom of the surface layer includes both tensile strain and compressive strain, and it is in a tensile-compressive strain alternating state, and the fatigue life of asphalt concrete under a certain stress is more different than that under simple tensile stress. With the increase of vehicle speed, the maximum tensile strain and strain amplitude showed a downward trend, and the maximum pressure strain and strain ratio showed an overall upward trend. The destructive effect of heavy-duty vehicles on the road surface at low speed is more serious. The strain ratio is affected by both axle load and speed

In order to ensure the wind safety of the Saiwu Diegor Bridge, which has an extremely important position, the basic wind speed data of the Fuyun County Meteorological Station in the bridge site area were used to analyze the basic characteristics of the average wind speed, maximum wind speed, extreme wind speed over the years, and the average wind speed and wind direction of each month. The maximum wind speed sequence of the weather station was established year by year, and the design basic wind speed at different recurrence periods of the bridge was calculated by using extreme value I. type, Pearson type III. and different specifications. At the same time, considering the different types of land surface in the Karasuk Reservoir where the bridge is located, the design benchmark wind speed at the bridge deck is deduced, which provides an accurate basis for wind tunnel test and wind load calculation during flutter, jitter analysis and structural analysis of the bridge.

In order to ensure the wind safety of the Saiwu Diegor Bridge, which has an extremely important position, the basic wind speed data of the Fuyun County Meteorological Station in the bridge site area were used to analyze the basic characteristics of the average wind speed, maximum wind speed, extreme wind speed over the years, and the average wind speed and wind direction of each month. The maximum wind speed sequence of the weather station was established year by year, and the design basic wind speed at different recurrence periods of the bridge was calculated by using extreme value I. type, Pearson type III. and different specifications. At the same time, considering the different types of land surface in the Karasuk Reservoir where the bridge is located, the design benchmark wind speed at the bridge deck is deduced, which provides an accurate basis for wind tunnel test and wind load calculation during flutter, jitter analysis and structural analysis of the bridge.

In order to verify the feasibility of a national defense tunnel engineering design and construction scheme. According to the Drucker-Prager criterion of underground structure design and rock yield, considering the self-bearing capacity of the surrounding rock, ANSYS9.0 software was used to simulate the excavation and support process of the tunnel in <>D finite element, verify the design parameters, and comprehensively analyze the deformation and initial support effect of the surrounding rock, and conclude that the design scheme is feasible, the initial support meets the requirements, and the hoard rock can stabilize by itself. The numerical analysis results are consistent with the on-site measurement results, which can provide theoretical guidance for related engineering design and on-site construction.

Wear resistance is one of the main properties of road and bridge concrete, and improving the wear resistance of concrete is of great significance to ensure its durability. Based on the ash entropy method, the author analyzes the significance of the factors affecting the wear resistance of fly ash concrete, and the analysis results show that the influence of water consumption and aggregates is significant, followed by cement dosage, and the influence of fly ash content is minimal, which can provide scientific basis for the design of fly ash concrete with wear-resistant requirements. The theoretical derivation of ash entropy method is relatively strict, the calculation is simple, and the size of ash entropy correlation is not affected by the resolution coefficient, which can overcome the shortcomings of the general gray correlation method, and achieve more ideal results when analyzing the significance of each influencing factor.