The light and high strength CF/ABS composites were designed and composite wrenches with various shapes were fabricated by using 3D printing technology. The self-made sizing agent for carbon fibers effectively improved the aggregation and surface wettability of carbon fibers, and has good bonding with the high flow ABS resin. The prepared 3D printing wrench could choose the size, caliber and thickness according to the actual needs, which technical has a practical application prospect. The quality and market price of 3D printing CF/ABS composite wrench were analyzed and the price of the wrench prepared by this method is about 0.6 yuan. The low price and high performance are conducive to the daily promotion of 3D printing CF/ABS composite wrench.

To optimize the condition of microwave extracting Chroogomphidius viscidus polysaccharides (CVP) and evaluate the antioxidant activity of CVP. Response surface methodology was used to optimize the extraction process of polysaccharides extracted from Chroogomphidius viscidus, sevage was used to remove proteins from the crude polysaccharides of Chroogomphidius viscidus, and DPPH was used to evaluate the antioxidant activity of CVP in vitro. Selecting the ratio of liquid to material, microwave power, microwave temperature and microwave time as the four parameters of the response surface analysis method, and analyzing its influence on the yield of polysaccharides, using the Design-Expert software for the second response surface analysis of the test data. The optimum extraction process conditions were as follows: microwave time 25 min, microwave temperature 70°C, microwave power 780 W, liquid-to-feed ratio 30:1, and polysaccharide yield reached 15.00%. After 6 times sevage removal of protein in the crude polysaccharide of Chroogomphidius viscidus, the protein removal rate can reach 97%. The highest scavenging rate of the purified CVP on DPPH free radical can reach 77%. Microwave extraction technology is suitable in the extraction of CVP, and CVP shows a stronger antioxidant capacity.

The mathematical model of spiral Angle groove was established, and the influence rules of different groove number, rotating speed, inlet pressure, groove depth and gas film thickness on sealing performance were studied by Fluent. By analyzing and comparing the sealing performance parameters, such as static pressure, opening force, leakage, etc., the optimum geometric structure parameters of single spiral Angle slot are obtained. Aiming at the problem of single helical corner slot, a kind of double helical corner slot dry gas sealing structure is proposed, and the calculation results show that the double helical corner slot can make the aerodynamic separation effect more obvious, and the sealing effect is better when the helical Angle of suction side is larger than that of pressure side. When the two Angle tolerance is 2°, the sealing performance of the spiral Angle slot is better.

In order to improve the space utilization rate and comfort level of small apartment, a movable intelligent expansion furniture was designed and developed. Through the control of Arduino SCM and the transmission of mechanical structure, the conversion of space and scene in the apartment can be realized.So as to greatly improve the utilization of space, realize the intelligent expansion of small apartment.

In order to obtain the characteristic relationship between the position quantity and the output voltage of the SDMSA type dual magnetic ring magnetostrictive linear displacement sensor, on the self-made sensor calibration test bench, the excitation magnetic field generated by the displacement sensor rod and the bias generated by the double magnetic ring The relationship between the magnetic field and the distance between the double magnetic rings was studied, and the output voltage model of the double magnetic ring magnetostrictive displacement sensor was established. Under the effect of the same paranoid magnetic field, the relationship between the distance between the dual magnetic rings and the output voltage is explored, and the relationship is derived through experiments. The characteristic relationship between the position and output voltage of the dual-magnetic-ring magnetostrictive linear displacement sensor SDMSA is obtained, and the measurement error of the displacement sensor is analyzed.

The surface treatment of Q345 steel plate was carried out by plasma spray welding. The optimum process parameters of Q345 surface treatment were optimized by orthogonal experiment. The optimized spray welding process was as follows: current 60 A, welding gun walking speed 20 mm / min, powder feeding rate 35%, ion gas flow rate 1.2-1.4 L / min, shielding gas flow rate 10-12 L / min. The results show that the microstructure of Q345 substrate is normal, which is pearlite + ferrite. The microstructure of heat affected zone is still pearlite + ferrite. The microstructure of spray welding layer is iron matrix and eutectic (Cr, Fe)₇C₃ phase. ZrC in the spray welding layer can be used as the heterogeneous core of iron matrix, which can refine the grain size of iron matrix and improve the mechanical properties greatly. The impact toughness of the composite plate prepared by the optimal process is 192.8 J/cm². The fracture mode of the high strength layer is quasi cleavage fracture, and the fracture mode of the matrix layer is cleavage fracture.

In order to study the influence of cross-sectional area of micro Direct methanol fuel cell on bubble flow, the VOF method in FLUENT was used to study the serpentine channel. The range of depth was 0.2 mm, 0.4 mm, 0.6 mm The width range is 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.5 mm. Assume that the flow pattern is Laminar, all Incompressible flow, and ignore gravity. The results show that the pressure drop at the inlet and outlet of the snake-shaped runner increases with the decrease of the runner depth When the width of the shoulder is 0.75 ~ 1 times of the width of the runner, the discharge time of the bubble section is shorter and the pressure drop of the inlet and outlet is larger.

The ABAQUS software was used to model the bellows of super-elastic silicone material, and the finite element simulation analysis was carried out on the internal inflation pressure model. The stress, axial elongation and radial direction of different bellows wall thickness after pressure were analyzed. The effect of expansion. The simulation results show that the thicker the wall at the corrugated part of the bellows, the stronger the restraining ability of its radial and axial deformation. In the case of a thin wall, the bellows may be insufficiently restrained and cause instability.

If the boundary conditions are not considered in the limit load analysis of the soft foundation reinforcement section, the analysis results will be deviated, and the hidden danger will easily occur during the train operation. Therefore, a new limit load analysis method for the soft foundation reinforcement section of high-speed railway is proposed, and its effectiveness is analyzed through experiments. Considering the boundary conditions of the calculation model, the ultimate load calculation scheme is designed, the basic coordinate system in the limit equilibrium state is established, and the stress component in the yield state is analyzed. By solving the stress equations, the load displacement curve of the reinforced section of soft foundation can be obtained in the calculation software. The engineering application results show that the load displacement curve obtained by the proposed method is closer to the actual situation, and the analysis results are more accurate.

In order to realize the trajectory tracking control of wheeled mobile robot, a sliding mode controller is designed in each closed-loop subsystem based on the double closed-loop control scheme, and particle swarm optimization algorithm is applied to optimize the controller parameters to achieve better tracking effect. Simulation results show that the designed controller can realize trajectory tracking, and compared with the parameters set by human experience, the parameters obtained through optimization can improve the control performance of the controller.

Aiming at the problem for task-processor assignment in distributed computing,two improved algorithms based on A* algorithm are proposed.By analyzing the principle of A* algorithm,the search tree model of applying A* algorithm to task assignment problem is obtained,and by dividing the search tree as evenly as possible among the processing units and by avoiding unnecessary nodes extension,the optimal solution is obtained. The experimental results show that, compared with the traditional A* algorithm, the proposed two improved algorithms can not only save memory and task execution time by reducing search space,but also improve the speedup performance of algorithm execution by parallel assignment.

In order to improve the efficiency of steel ball diameter detection in small and mediμm-sized enterprises and reduce the investment of capital, a method of steel ball diameter measurement based on machine vision was presented. First, the working principle of the system was given; secondly, the core hardware was designed and the hardware parameters were given; finally, the experimental platform was built. When the designed system was used to measure steel ball with diameter of 6mm and 8mm, the standard deviation is less than or equal to 0.007mm, and the repeatability precision approaches 0.023mm. The linearity of the system is ideal when measuring the diameter of steel ball from 6 to 8mm. The experimental results show that the system can be used for high-precision and non-contact detection of steel balls of grade G100 or below.

The control system of the feeding trolley adopts the programmable controller (PLC) monitoring system of Siemens s7-1200 series and adopts the upper computer and the HMI seven-inch display screen of Siemens to monitor and control.Frequency converter MM440 model.The composition, hardware and software design and control principle of the feeding trolley control system and the monitoring system are described, and the automatic process of loading and unloading of the feeding trolley is realized.To meet the needs of blast furnace iron.

The machine Vision technology and LabVIEW Assistant are used to detect and analyze the glass defects, and the common defects of acrylic glass are mainly scratches and bubbles.The image processing module process on LabVIEW includes the gray level transformation and morphology, threshold value, and the particle analysis is carried out at last. In this study, the defects of glass were identified by template matching. The results show that this method can accurately detect the existence of scratches and bubbles, and judge the location and number of defects. The correct rate is 94% .

With the development of social economy, the importance of fire safety has become increasingly prominent, and higher requirements have been put forward for the stability of the fire protection system. With reference to the national "Specifications for the Design of Automatic Sprinkler Systems" and other fire protection codes, we proposed a PLC-based electrical structure design scheme for the inspection and emergency devices of the fire protection system. This scheme is beneficial to improve the maintainability and scalability of the system, enhances the convenience of operation and the intuitiveness of monitoring, and has good application value.

A strain of high efficiency flocculating to improve the removal of copper ions was selected from activated sludge of Jilin sewage treatment plant, and was amplified and identified by 16 S rDNA. The flocculating conditions of copper ion (0.2 ppm) by bioflocculant were studied. The results show that the flocculation efficiency is over 80%. Significant influencing factors and variables were pH, flocculation time and Graphene Oxide (GO) inducer which had major impact effects on flocculation efficiency. The highest flocculation efficiency which 86.01% achieved at pH=5, at 1.62h and 13.11mg/L GO as inducer.

In order to improve the liquor yield of Luzhou flavor liquor, disc koji making machine was used as the production site of saccharifying and fermenting starter disc Sanqu of Luzhou flavor liquor. The production conditions of saccharifying starter disc Sanqu of Luzhou flavor liquor were analyzed from the perspectives of containing and not containing white tinea soil mud. The results showed that: the white tinea soil mud had little effect on the production conditions of Sanqu, and had no significant effect on the quality of disc Sanqu, a saccharifying starter for Luzhou flavor liquor. When the dosage of the soil mud was less than 5%, the quality of Sanqu was almost not affected. The physical and chemical indexes of Sanqu produced by disc starter making device were higher than the first grade. No matter whether or not Baixuan soil mud was used to make koji, the obtained Sanqu could meet the application standard of disc Sanqu with saccharifying starter. Compared with the traditional large wine cake fermentation, disc Sanqu fermentation has the advantages of short stacking time, less bacteria and high liquor yield.

vIn this study, the sorption behavior of oxytetracycline and Ciprofloxacin on CPE, Pe and polyvinyl chloride was studied, the results showed that the adsorption capacity of microplastics to antibiotics was affected by the properties of microplastics, the kinds of antibiotics and the background solution, and the effect was very significant. The adsorption of oxytetracycline and oxytetracycline on micro-plastics was as follows: CPE (polyethylene) polyvinyl chloride (PE) PE, the adsorption of oxytetracycline in pure water was not significantly different from that in fresh water; The adsorption capacity of CPE TO CIPROFLOXACIN in pure water was stronger than that in fresh water.