bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on the Influence of Microwave Filler on the Performance of Recycled Asphalt Mixture
Authors: Zhang Chen , Li Bo , Chen Zhuang , Wang GuoFang
Published: March 2020

In order to study the effect of different microwave fillers on the performance of microwave reclaimed asphalt mixture, carbon black with 10% by volume of asphalt and steel fiber with 6% volume fraction of asphalt were respectively formed by microwave induction method 30%, 40%, 50%. Recycled Asphalt Mixture (RAP) with water-immersed Marshall, uniaxial penetration, four-point bending fatigue for water stability, high temperature stability, fatigue resistance the study. The results show that the asphalt mixture test piece formed by microwave heating has better high temperature stability, water stability, fatigue resistance than the test piece formed by the conventional heating method. the microwave-induced reclaimed asphalt mixture with 40% RAP content has the best high temperature stability. For the performance of high temperature stability, it is better to add steel wool fiber as microwave microwave filler, and the carbon black is used as microwave. Compared with steel fiber, the filler is superior to the water-stable and anti-fatigue of the recycled asphalt mixture under microwave induction.
Catalytic wet oxidation treatment of landfill leachate
Authors: Shi Liang , Zhang Yongli , Lian Siying
Published: March 2020

The landfill leachate was treated by catalytic wet oxidation. The catalysts was prepared by impregnation method, and FSC was used as catalyst carrier. Fe and Co were used as catalyst active components and Ce was used as catalyst auxiliary, and noble metal ruthenium was added to prepare supported multi-component composite catalyst of Fe-Co-Ru-Ce/γ-Al2O3. The water sample pH, decolorization rate, COD removal rate and turbidity removal rate were used as evaluation indexes of catalyst activity. The catalysts were prepared under the conditions of calcination temperature of 450 °C and calcination time of 3 h. Under the same conditions, for the Landfill Leachate, the COD removal rate, decolorization rate, turbidity removal rate of the water samples reached 78.1%, 60.4% and 92.7%, respectively.
Research on Measurement Technology of Residual Stress in Rolling Aluminium Alloys
Authors: Wang Xi
Published: March 2020

In the measurement of textured materials such as Al Alloy sheet, the traditional method of X-ray residual measurement (sin2ψ method) cannot be applied to these materials. In this paper, 2A97 aluminium lithium alloy was used for the study on residual stress measurement of texted materials. The X-ray diffraction method was used to test the orientation distribution function. The elastic constant of the material was calculated theoretically by Ruess model, Voigt model and Neerfeld-Hill model. And the residual stress was calculated. The blind-hole method was used to verify the results. The blind-hole result agreed well with the Neerfeld-Hill model.
Selection and control of green roof materials based on sponge city perspective
Authors: Huang Lijuan , He Xuelian , Tang Xiaohong , Fu Wenfeng , Li Liang
Published: March 2020

This article starts from clarifying the connotation relationship between sponge city construction and green roof, and analyzes the construction plan and the best material selection under the influence of sponge city construction. Then introduces and compares the construction of the green roof under the sponge city background and the materials that can be used at the structural level, the evaluation index system of material selection based on DEA, five kinds of materials of input/output ratio of SBS modified asphalt waterproof coiled material is 0.477, TPO thermoplastic polyolefin waterproofing material is 0.255, PVC waterproof coiled material is 0.335, EPDM waterproofing material is 0.292, and spraying polyurea waterproof coating is 0.245. Comparison and analysis to choose spraying polyurea waterproof coating as the green roof material is more reasonable. This will provide a basis for the design of green roof materials in the context of a sponge city.
Analysis on Reaction Kinetics of High Temperature Corrosion to Metal Heating Surface in Biomass-fired Boiler
Authors: Sun Yu , Wang Yongzheng , Zhu Wenbin , Li Yungang
Published: March 2020

In this paper, the effect on temperature to biomass boiler corrosion is studied by corrosion weight gain experiment, and the thermal analysis model of high temperature corrosion is established by reaction kinetics using experimental results. The corrosion weight gain curve of the heating surface steel is in accordance with the parabola. The thermal analysis kinetics of T91 corrosion process is studied, and the data is matched with several functional models at 480°C to 680°C. The results show that the corrosion reaction is the two-dimensional diffusion type. The reaction kinetic equation was determined and the corrosion process was quantitatively analyzed.
Synthesis of BiOBrXCl1-X by Solvothermal Method and Its Photocatalytic Activity
Authors: Wu Yijiang , Deng Xiaoyan , Zhang Zhenying , Li Weibin
Published: March 2020

In order to improve the activity of monohalide ruthenium oxide, different ratios of BiOBrXCl1-X series samples (X=0, 0.2, 0.4, 0.6, 0.8, 1) were synthesized by solvothermal method. The synthesized BiOBrXCl1-X samples were characterized by X-ray diffraction (XRD), ultraviolet-visible diffuse reflectance spectroscopy (UV-DRS) and scanning electron microscopy(SEM). The photocatalytic degradation experiment for Rhodamine B showed that the BiOBr0.2Cl0.8 sample had higher degradation efficiency under visible light and effectively improved photocatalytic activity.
Study of microstructure and mechanical properties of pure titanium processed by new route of equal channel angular pressing
Authors: Li Xue , Du Meitong , Mao Zhoujian , Huang Tao , Ban Chunyan
Published: March 2020

In this study, samples of pure titanium were processed by equal channel angular pressing (ECAP) up to four passes at 573 K to produce a refined microstructure under different deformation routes. A new route B135 was developed by defining 135° clockwise rotation of samples in each pass. In order to study the deformed structures, optical micrograph (OM) and electron backscatter diffraction (EBSD) analysis were performed, and the mechanical property was evaluated by the microhardness tests. The OM and EBSD results reveal that the mean grain size of ECAPed samples is much finer than that of the initial sample. Furthermore, it also reveals that B135 is much effective in terms of grain refinement. The microhardness test results show that ECAP process via both route B135 and BC causes a much increase in hardness.
Study on the Effect of Additives on the Corrosion to Metal Heating Surface Caused by Alkali Metal Chloride and Sulfate in Biomass-fired Boilers
Authors: Li Yungang , Wang Yongzheng , Zhang Ke , Sun Yu
Published: March 2020

In this paper, the horizontal tube furnace was used to study the inhibition effect of various additives on the corrosion to metal heating surface in biomass-fired boiler. The results showed that the corrosion rate of the metal samples was significantly reduced by kaolin, pulverized coal ash, silica fume, dolomite, limestone and bauxite. When kaolin, pulverized coal ash, silica fume and bauxite are used as additives, the corrosion is obviously inhibited. When dolomite and limestone are used as additives, the inhibition effect is poor, but the corrosion rate is also reduced. The corrosion ability of alkali metal chloride is greater than that of alkali metal sulfate. Different additives have different inhibitory effects on them.
Study of Electron Spin Diffusion and Relaxation Dynamics by Diffraction of transient spin grating in an Intrinsic GaAs/AlGaAs Quantum Well
Authors: Yu Hualiang , Zhou Yinwu , Liu Liqin , Chen Xiyao , Wang Jianbin , Zhang Meiyu
Published: March 2020

In this paper, the transient spin grating method was used to measure the attenuation rate of the diffraction signals of the intrinsic spin gratings of the intrinsic GaAs/AlGaAs quantum wells in different periods at room temperature, and the electron spin diffusion coefficient Ds
= 121±6cm2/s was obtained. The electron spin diffusion coefficients of GaAs/AlGaAs quantum well were in good agreement with that of p-type GaAs/AlGaAs quantum well, indicating that the doping type for GaAs/AlGaAs quantum well has no significant effect on the diffusion rate of spin-polarized electrons. In this paper, the widely used formula of transient spin grating diffraction signal attenuation rate was used to fit the diffraction experimental results of the transient spin grating in the intrinsic GaAs/AlGaAs quantum well. The measured electron spin relaxation time was much shorter than that measured by the saturation absorption method. The reason for the deviation in the measured spin relaxation time was analyzed. The dynamic law of transient spin grating modulation attenuation over time was derived. The decay rate formula was modified, and the modified formula was used to fit the experimental data in the transient spin grating diffraction to obtain the spin relaxation time τs
= 123 ps. The result was consistent with the measured electron spin relaxation time by the saturation absorption method.
Study on Film Formation Properties of SiC Slurry
Authors: Xu Man , Wu Mengyu , Wang Shulin , Guan Mengke
Published: March 2020

Two kinds of silicon carbide (SiC) powders with median diameters of 0.60μm and 2.04μm were selected as raw materials, and uniformly dispersed SiC coating film solutions were prepared through different particle grading. The effects of gradation ratio and dispersant tetramethylammonium hydroxide (TMAH) on the dispersibility and rheology of SiC coating films were studied, and the effect of dispersant content on the film forming properties of the slurry was discussed. When the fine powder and coarse powder grading mass ratio is 3:7, the particle size distribution of the mixed powder is closest to the theoretical distribution of the Dinger model. At this time, the slurry has good rheology and high particle bulk density. When 0.4% TMAH is added, the viscosity of the slurry is the lowest. When TMAH is added in an amount of 0.1 to 0.2%, the slurry has good film-forming properties.
Reconstruction of cotton-polyester blended fabric
Authors: Li Zhi
Published: March 2020

Through this article, as the procedures of added glycol (EG) catalyzer in reaction system; After depolymerize the polyester fibre(PET) of the waste cotton-polyester blended fabric to alcoholysis as bis-hydroxyethyl terephthalate (BHET), and then separate it with solid cotton and liquid BHET through the Solid - liquid separation device. To added separation product (BHET) and catalyzer in the Polycondensation reaction system to polycondensation BHET as reconstituted Polyethylene terephthalate (PET). The experimental results indicated that separated cotton and reconstituted PET meet the requirement of recycling.
Durability and bending behaviour of concrete beams reinforced with hybrid GFRP rods and steel bars
Authors: Ren Yanru
Published: March 2020

It is feasible to take the place of steel bars with FRP rods as the pulled main bars in the reinforced concrete structures by many researchers. However, FRP rods concrete beams have been limited due to many reasons, such as the lower elastic modulus of FRP rods and reduced the ductility of the members owning to the fragility of FRP rods. In order to finish off these trouble, scholars have adopted a possible method that simultaneously utilizing FRP rods and steel bars in concrete members for reinforcement. The bending behaviour and durability of this new form of reinforcing member may still be problematic and this field needs further study. The bending behaviour and durability of concrete beams reinforced with hybrid GFRP rods and steel bars have been experimentally studied and some conclusions have been got.
Spatial Distribution characteristics and Ecological risk Assessment of heavy Metal As, Ba in soil of a Chemical Slag Field in Sichuan Province
Authors: Wu FangJian , Xu GuiHong
Published: March 2020

45 boreholes were determined according to the situation of an industrial slag field in Sichuan Province. According to 10~20cm stratification as soil sampling, the content and characteristic distribution of heavy metal elements, such as barium (Ba), arsenic (AS) in soil, were determined, and the spatial distribution characteristics of As, Ba were studied by Geostatistics method. The pollution and ecological risk of As, Ba in the industrial slag site were analyzed by using the single factor index method, the Nemerow index method and the potential risk index evaluation. The results show that barium is the main pollution factor of waste residue, with an average value of 127576μg/L, which is mainly distributed in the range of 2.908~2667000 μg/L. The mean value of arsenic was 8.72 mg/kg, respectively.
Mechanical characteristics analysis of two-stepped slope based on flow-solid coupled method
Authors: Chen Xiaoran , Lu Yulin , Lin Wei , Wang Li
Published: March 2020

Atwo-stepped slope stress and displacementfield characteristic is analyzed by the flow-solid coupled method in this study. The results of numerical simulation show that the maximum displacement of the coupled method appeared on the slope top and the value is larger than the results of uncoupled method. The results of stress show that the first principalstress of coupled method is larger, and this character is consistent with the coupled effect between groundwater seepage and stress, and then proved that the influence of groundwaterseepage on stress is not neglect. The analysis method of this paper provides a reference for the stability of multi-stepped slope under complex conditions.
Fuzzy-Random Reliability Analysis of loess landslide Stability Under Earthquake
Authors: Mu Peng
Published: March 2020

In this paper, the fuzziness of the failure events and the parameters of the random variables is considered. In the reliability analysis of the loess landslide stability, the combination of the randomness and fuzziness is proposed, and the fuzzy random reliability calculation method of the loess landslide stability under the earthquake action is proposed. The established model is applied to the seismic stability analysis of a loess landslide, and the evaluation results show that the loess landslide is in an under stable state under the seismic action.
Experimental study on the tensile performance of cement stabilized recycled aggregate pavement base
Authors: Chen Feng
Published: March 2020

As the main bearing stratum of pavement, the base mixture is equivalently subject to external shear stress when unevenly stressed, so the splitting performance is an important parameter to measure its engineering characteristics. The results of splitting and splitting rebound test showed that the strength and rebound modulus of cement stabilized macadam and cement stabilized recycled aggregate increased exponentially with age. Through comparative analysis, it was found that the splitting and tensile properties of cement stabilized recycled aggregate were slightly inferior to that of cement stabilized macadam. Finally, the strength calculation formula of the mixture was derived, which could provide reference for practical engineering.
Literature review of seismic performance of double-layer steel plate-concrete composite shear wall with stiffeners
Authors: Wang Chungang , Liu Shengkai , Chen Yong , Chen Peng
Published: March 2020

Shear wall, as the main anti-sway component in high-rise buildings, plays an important role in resisting horizontal earthquakes. Shear wall has high ductility and high bearing capacity with the participation of steel plate, which can meet the requirements of high-rise building structures on structural members. Shear wall with steel plate is divided into two types according to the construction method, one is Shear wall with single steel plate, and the other is shear wall with two layers of steel plates. n recent years, double steel plate shear walls with stiffeners have attracted much attention due to their good ductility and ease of construction. By summarizing the current research situation of steel plate concrete shear walls, suggestions are made for future research.
Study on influencing factors of mechanical properties of ceramsite foam concrete based on orthogonal test
Authors: Tao Feiyu , Gu Pengyuan , Yang Ying
Published: March 2020

In this paper, orthogonal test is used to optimize the mix ratio of ceramsite foam concrete and improve the strength of ceramsite foam concrete with ceramsite content, water-cement ratio and fly ash content as the research parameters, and the compressive strength is taken as the main investigation index.The experimental results show that the content of fly ash has the greatest influence on the compressive strength of ceramsite foam concrete, the content of ceramsite is the second, and the ratio of water to cement is the smallest.Through experiment and analysis, the recommended mix ratio is as follows: the content of ceramsite is 10% ∼20%, the amount of fly ash is 10% ∼15%, and the ratio of water to cement is 0.4 ∼0.5.
Fatigue life of CFRP laminate strengthened high-strength steel plates under fatigue loadings
Authors: Zheng Yun , Hu Lili , Wang Yuanyuan , Feng Peng
Published: March 2020

Carbon fiber reinforced polymer (CFRP) sheets and laminates are effective and practical for strengthening steel with initial damages under fatigue loading due to its advantageous strength and fatigue resistance. Unfortunately, studies of cracked high-strength steel plates strengthened by CFRP laminates are still limited. This paper studies the strengthening efficiency of CFRP laminate on cracked Q345, Q460 and Q690 steel plates under fatigue loading. It is found the fatigue life by CFRP laminates is increased to 1.53 to 3.84 times as that of un-strengthened specimen. Compared with CFRP sheet with the similar reinforcement stiffness, CFRP laminate strengthened specimens exhibit longer fatigue life under low stress range (195 MPa), and shorter fatigue life under high stress range (240.5 and 402.5 MPa). The difference is due to the matched adhesive of CFRP laminates (Araldite-2015) has lower elastic modulus but higher strength and ductility compared with matched adhesive of CFRP sheets (E2500S). Thus the material property of adhesive is a key factor determining fatigue life under different range of fatigue loadings. Crack propagation and different failure modes were observed. Serious debonding around the crack tip occurred, which leads to a further study.
Comparative study on calculation methods for local buckling critical stress of rectangular section FRP members
Authors: Hu Yifan , Yang Zhipeng , Tao Feiyu
Published: March 2020

The prediction accuracy of the local buckling critical stress calculation formula of the existing FRP members is analyzed by the experimental data of the local buckling critical stress of the fiber reinforced polymer (FRP) members.Verification of the validity of the finite element model based on experimental data.The comparison results between the numerical simulation critical stress and the predicted value of the calculation formula after adjusting the size of the FRP member are obtained. The variation of the prediction accuracy of the existing calculation formula is studied.The research shows that the predictive value of the calculation method proposed by Strongwell in 1998 underestimated the database test data by 45.4%, and underestimated the finite element simulation result by 46.3%.It is the equation closest to the actual local buckling critical force of the PFRP member. As a general formula, predicting the local buckling critical stress of the PFRP member can improve the material utilization rate. After the research, it was found that the calculation formula proposed by Strongwell Company had a large error with the database test data, and there is still room for improvement.
Experiment study on mechanical properties of sand-doped bentonite
Authors: Cao Yupeng , Zhang Rui , Xu GuiZhong , Zhang Shuai , Xu Jianwen
Published: March 2020

Bentonite is a special soil with water expansion and water loss shrinkage properties, which is widely used as backfill material. In order to explore the effect of sand content on the properties of Bentonite, compaction test, wL
(liquid limit) and wP
(plastic limit) test, direct shear test and permeability test were taken to analyse the compaction, hydrophilic, shear characteristics and permeability of sand-blended bentonite. The results show that as the amount of bentonite increases, wop
(the optimal water content), wL
, wP
and IP
(plastic index) of sand-doped bentonite increase, the Pdmax (the maximum dry density) and cohesion increase first and then decrease, the angle of internal friction decreases gradually. When bentonite content is less than 20%, increasing the content of bentonite has significant effect on reducing coefficient of permeability.
Crack propagation and debonding development of CFRP laminate strengthened high-strength steel plates under fatigue loadings
Authors: Zheng Yun , Wang Yuanyuan , Hu Lili , Feng Peng
Published: March 2020

Carbon fiber reinforced polymer (CFRP) has been used to strengthen steel structures to enhance fatigue life. A crack growth induced debonding region in the adhesive-steel interface has been observed in failure modes. However, limited studies focus on its gradual development with fatigue loadings, especially for CFRP laminate strengthened cracked high strength steel plates. The purpose of this paper is to obtain the corresponding relationship of crack propagation and debonding development. Thus fatigue tests with measuring real-time change of CFRP strain distribution by Digital Image Correlation (DIC) system were conducted for Q345, Q460, Q690 steel under fatigue loading at the same stress level 50% but difference stress ranges. Although debonding at the adhesive-steel interface is invisible, through calculation of strain gradient, it is found that as the increase of crack length, the debonding region around the crack tip occurs and gradually becomes larger. Furthermore, the shape of debonding region is always similar to an ellipse from the beginning of loading to failure.
Pavement deformation prediction and monitoring case analysis of jacking and underpass highway in Huairou District, Beijing
Authors: Yuan Ye , Wang Yang , Zhao Shuqing , Ding Mengda
Published: March 2020

In recent years, with the construction of municipal pipeline, the situation of pipeline crossing highway is increasing day by day, and the pipe jacking construction is often used at the crossing place. Pipe jacking construction will inevitably cause deformation of surrounding soil and ground settlement, which will affect the smoothness of the road and the comfort of driving. Taking Huairou District sewage pipe jacking project as an example, this paper uses numerical simulation method to simulate the construction process, predict the deformation of the road surface during the construction process of the road crossing, and verify the feasibility of the calculation of subgrade deformation caused by pipe jacking construction by analyzing the monitoring data.
Research of autonomous moving track detection vehicle
Authors: Tang Chao , Jia Jing , Chen Chuang , Zhao Siyu , Zhu Tianci , Lv Xiaojun , Zhao Sihai
Published: March 2020

At present, track measurement instruments are mostly manually driven for measurement, and the detection efficiency is not high, which cannot meet the needs of rapid development of rail transit. In this paper, an autonomous moving track detection device driven by wheel hub motor is developed, and the inertial measurement method is applied to track parameter detection to improve track detection efficiency and accuracy.And realize the remote control of wheel motor by GSM module.
Path planning algorithm of the intelligent vehicle considering the passenger feelings
Authors: Zhang Kaijiong , Zhang Xi , Deng Weishun , Yu Fan , Shang Shiliang , Guo Mengge
Published: March 2020

As the autonomous driving vehicle becomes popular, the driver will be completely replaced by autonomous system, but passengers in the vehicle will always exist. Autonomous vehicle has the essential property of transporting people, so the passenger comfortability should be fully considered. In this paper, based on the trust between the passenger and the driver, the passenger physical and psychological feelings are comprehensively considered. Through the real track test data, the support vector machine is used to establish the passenger feeling evaluation model -- to show the relationship between the passenger and the autonomous driving system. And then, based on the evaluation model, a new path planner algorithm is proposed, which is proved by simulation that the re-planning path can significantly improve the passenger comfortability.
Design of Intelligent Watering System of Flower Based on ZigBee and WiFi
Authors: Huang Wuyang , Yang Fan
Published: March 2020

Aiming at the problem that the traditional artificial watering method in flowers is time-consuming and laborious, and cannot reasonably water the growth of each flower, an intelligent watering system of flower cultivation based on ZigBee and WiFi technology is designed. The CC2530 chip is used as the main control chip for ZigBee communication. Multiple terminal nodes and the coordinator node are wirelessly communicated through the ZigBee network. The RTL8710 is used as the WiFi communication chip to upload data to the host computer. The data and image curves are displayed on the host computer in real time. A composite switching control algorithm based on fuzzy control and PID control is designed. Based on the collected temperature and humidity and light intensity, the irrigation demand is calculated to achieve a better water-saving irrigation effect. Through the test, the entire system with excellent control performance and practical application value.
A Design Method of Missile Acceleration Autopilot Based on Active Disturbance Rejection Control
Authors: Chen Siyuan , Yang Lihong , Liu Yunfeng
Published: March 2020

In order to solve the problem that the performance of the traditional two-loop acceleration autopilot is relatively large affected by the missile aerodynamic, an improved design method based on active disturbance rejection control (ADRC) is proposed. The ADRC acceleration autopilot adopts the extended state observer (ESO) to estimate the disturbance and eliminate the impact of the model uncertainties and external disturbances, which achieve good interference suppression and accurate tracking of command. Then the pole placement method is used for the ADRC autopilot parameter design. Finally, the ADRC autopilot is compared to traditional two-loop autopilot and two-loop autopilot with PI correction under parameters uncertainty and external disturbance, the simulation results demonstrate that the impact of these two factors on the performance of the ADRC autopilot is relatively small. Therefore, the ADRC autopilot is proved to have fast response speed, good transient process, strong anti-interference ability and robustness.
Speed Control Study of Brushless DC motor Based on Fuzzy Optimization PID
Authors: He Menggao , Zhang Tong , Huang Jiexin , Luo Congjie
Published: March 2020

Targeting at the problems of response lag and poor control effect of traditional PID speed control system for brushless DC motor, a novel PID speed regulation system based on fuzzy optimization was proposed in this paper. On the basis of analyzing basic working principle of brushless DC motor, the new fuzzy selftuning PID optimal controller is introduced, the controller output switches power MOSFET devices by changing the duty ratio of PWM control signal, thus the speed control of brushless DC motor was realized. Both the fuzzy optimized PID control introduced in this paper and the traditional PID control are respectively simulated and compared under the Matlab/Simulink environment. The results show that with the fuzzy optimized PID control system has better performance than traditional PID control.
INS/CNS integrated filtering technique based on celestial calibration
Authors: Yan Fei , Zhao Wangyang , Hong Hao , Zhao Fenghao , Liu Juzhong
Published: March 2020

This paper analyzes the filtering mode and working characteristics of INS/CNS system according to application features of celestial equipment. In view of combination mode of gyro drift calibrated by CNS, this paper establishes corresponding filtering model according to different measurement information selected by INS/CNS system. The error of inertia component is compensated by virtue of star vector estimate value so as to guarantee the long-term precision of inertial navigation. Simulation analysis verifies that this method may improve adaptability of INS/CNS system to environment, and effectively guarantee the navigation precision in long-time operation of the system.
Simulation and optimization of roll to roll hot embossing based on viscoelastic material PMMA
Authors: Ye Huichun , Yu Yongyao , Zhang Tao
Published: March 2020

The roll to roll hot embossing(R2RHM) is an innovative technique for rapid fabrication of polymer microcomponents. In this paper, ABAQUS simulation software is used to establish the roller model in R2RHM. Moreover, the polymer material model PMMA viscoelastic material model is given by Prony series and WLF equation. Based on these models, the influence of five factors, as pattern radius, velocity, interference, temperature and duty cycle, on the quality of R2RHM is studied by a control variable method, and the influence trend of eachsingle factor on the quality of hot impression is obtained. It is resulted that the radius of the pattern has little effect on the quality of the hot impression, while the velocity, interference, temperature and duty cycle exhibited a significant effect on the quality of the hot impression.
Performance analysis of generated spoofing under integrated navigation conditions
Authors: He Menghao , Li Changgeng , Zhou Chao , Ma Chao
Published: March 2020

Based on the establishment of the loosely coupled integrated navigation model, this paper realizes generated spoofing by superimposing position increments in the positional state variables of the integrated navigation system. Theoretically deducing the delivery process of the position increment of the spoofing signal in the integrated navigation, thereby analyzing the influence of position increment on global satellite navigation system (GNSS) and GNSS/INS. The generated spoofing is divided into constant slanting and point-by-point slanting. The simulation analyzes the performance of the two spoofing strategies in the presence or absence of spoofing detection and the effect of different values of integrated navigation parameters on spoofing performance. The simulation results show that the point-by-point slanting and the constant value slanting are better in the presence or absence of spoofing detection, respectively. The value of the integrated navigation parameters will affect the spoofing performance.
Numerical simulation and research of the split ultrahigh pressure cylinder
Authors: Xu Shengjie , Zhao Dong , Gao Xiang , Liu Cheng , Huang Weitao , Meng Xianjiang
Published: March 2020

The pressure capacity of an ultrahigh pressure cylinder is the bottleneck of the development of ultrahigh pressure vessels. In order to improve the pressure capacity of the cylinder, the finite element software was used to analyse the single-layer thick-walled cylinder and the split cylinder under the same load. Research results show that the split cylinder has higher pressure capacity than that of single-layer thick-walled cylinder. Simulation of the different number subsections of the same size split cylinder show that the number’s increase of the subsections can effectively reduce their Von Mises stress under the same load.
Optimization of process parameters of GMP for 3D ultrathin glass based on cuckoo search algorithm
Authors: Ming Wuyi , Jia Haojie , Liu Xing , Liu Xin , He Wenbin , Wei Aiyun , Chen Zhijun
Published: March 2020

From the current development trend of mobile phone industry, 3D curved glass screen is undoubtedly the hot spot of the industry, and glass molding processing (GMP) is the main method of 3D curved glass manufacturing at present. 3D curved glass is a kind of curved glass which is formed by heating, softening, and annealing process in the mold. In GMP, process parameters not only determine the efficiency and quality of curved glass processing, but also affect the emission of CO2. Moreover, there is no definite mathematical model for the influence of these involved process parameters on the effect of hot bending. In this paper, the GMP experiment of the finished glass is carried out, and the relationship between the processing parameters and the processing quality of the finished glass is summarized. Furthermore, the experimental data is analyzed to investigate the influence of process parameters on performances of GMP. By cuckoo search algorithm method, the parameters of GMP are optimized.
Schematic Design of FOG Magnetic Sensitivity Test System
Authors: Lu Jun , Guo Zhi-rui , Liu Lei , Feng Jian-ye
Published: March 2020

Magnetic sensitivity is one of the research contents of environmental adaptability of fiber optic gyroscope (FOG). Based on the mechanism of the magnetic sensitivity of FOG, this paper sets forth the technical scheme of FOG magnetic sensitivity test system in detail, including completing the demands of measuring parameters such as the error coefficient of magnetic field, hardware scheme and software design. It is of great significance to act as a platform for the research on the magnetic sensitivity of FOG.
The Impact of Sino-US Trade Friction on Car Profits and Countermeasures
Authors: Zhang Yu , Tan Zheng , Yang Wenyu
Published: March 2020

Sino-US trade friction has caused widespread concern. A large number of enterprises have suffered heavy losses in this big country dispute, and there is an urgent need to be able to adapt to the solutions of the current era. With the outbreak of trade friction between China and the United States, the economic situation of the automobile industry in 2018 also showed an overall downturn. Most car companies’ profits were affected. Some enterprises’ economic conditions even showed the first negative growth for years, and some of them were well-known. At present, Sino-US trade friction has had a certain impact on most car companies in China, but this effect is controllable. Some enterprises have realized the continuous increase of profits by improving their own competitiveness and vigorously developing high-tech. Based on this, an early warning mechanism can be constructed to further design a response strategy from the enterprise level and the government level, and further explore whether the strategy is realistic and feasible. Specifically, enterprises must enhance their own development and competitiveness. And they should vigorously develop high-tech and keep up with the pace of the times. That is, adjust the export structure; and the government gives certain policy support to extremely difficult enterprises to help enterprises tide over the difficulties.
Risk Sharing of Political Force Majeure in PPP Projects in The Belt and Road
Authors: Zha Tongtong , Du Yaling
Published: March 2020

This paper identifies 12 political force majeure events through analysis the documents and literatures, and then classifies 8 key events. It is found that the risk allocation of most events is inconsistent by comparing and analyzing the risk allocation results of key events. This paper concludes that the risk allocation should be determined according to the specific circumstances on the basis of following the basic principles.
Research on Enterprise’s Total Budgeting Mmanagement in the Era of Big Data
Authors: Zhao Yeling , Wang Fangyuan , Qin Xuejia , Zhu Xinyue , Wu Ning , Chen Xiaoyan
Published: March 2020

With the continuous development of information technology, the application of big data has improved the efficiency and quality of total budgeting management in enterprises, and has opened up a new era of enterprise management. Based on the survey of big data and total budgeting management, this paper analyzes the impact of big data on total budgeting management of enterprises, constructs a total budgeting management system for enterprises in the era of big data, and proposes corresponding safeguard measures. The research results can provide a reference for enterprises to implement total budgeting management in the era of big data.
An agricultural audio retrieval method based on inverted index of silence word
Authors: Song Yue , Tao Sha , Ren Yanzhao , Liu Xinliang , Gao Wanlin
Published: March 2020

With the popularization of Internet and multimedia technology, a large amount of agriculture-related audio information is rapidly accumulated and widely used. The method of keyword matching retrieval for text data content describing audio files can no longer meet the need of agricultural audio files retrieval in terms of retrieval efficiency and content depth. In view of the above problems in agricultural audio retrieval technology, this paper proposes an audio retrieval method based on inverted index of silence word. In this method, a new hybrid retrieval model combining representation retrieval and semantic retrieval is designed and used. The experimental results show that the recall rate and precision rate of this method are above 99.5%, and the average retrieval time is less than 1s. Therefore, this method greatly improves the efficiency and the accuracy of the audio information retrieval, and can be used for rapid retrieval of agricultural audio.
Multi-QoS adaptive routing algorithm based on SDN for satellite network
Authors: Shi Xiaodong , Li Yongjun , Zhao Shanghong , Wang Weilong
Published: March 2020

With the development of communication services, satellite network services have developed from the traditional single type of services to multiple types of services. Different types of services need to meet different Quality of Service (QoS) requirements. The traditional satellite network algorithm does not distinguish the services, so the high QoS service in the network cannot get timely service. However, the architecture of Software Defined Satellite Networking (SDSN) can solve this problem well. The controller in the SDSN has a global view and can obtain the node and link information of LEO satellites. Therefore, the SDSN can more effectively meet the demand of data service for QoS. In this paper, a satellite network architecture based on Software Defined Networking (SDN) is firstly established. Then an adaptive routing algorithm that can meet various QoS requirements is proposed. The final simulation results show that compared with SDRA algorithm and Dijkstra algorithm, this optimization algorithm has better performance in QoS satisfaction rate and bandwidth utilization.
CiMC: A Computing-in-Memory Controller for Memristive Crossbar Array
Authors: Bu Kai , Li Zhiwei , Wang Wei
Published: March 2020

The significant challenges for the exascale system are the relatively limited computational resources and data movement between processors and memories. Memristor has the potential to build a universal digital nonvolatile computing system to break the energy-efficiency bottleneck caused by the separation of storage and processing in the traditional computing framework. Computing-in-Memory(CiM) based on memristor is a potential approach to addressing the data transfer bottleneck between processor and memory in a computing system. CiM could reduce or even remove the data movement between processors and memory. The unique properties of Memtistior allow both logic and memory function within an element, opening up the possibility of directly computing on the data stored in memory. We propose a Compute-in-Memory Controller, a design for computing and storing in a memristive crossbar array. Both logic operation and arithmetic functions are implemented with the controller. We also propose a two-layer instruction set to perform CiM functions, which addresses the question of how a CiM memory could be integrated into a general-purpose computing system.
Adaptive Link Parameter for V2X Communication in Predictable Channel
Authors: Jiang Xiaoming , Tong Xin , Wu Hao , Fang Jingru , Du Xue
Published: March 2020

In the internet of vehicles (IoV), periodic beacon messages carry the function of traffic safety data interaction. However, when traffic density increases, these beacons will cause channel congestion. To solve the problem, an adaptive link parameters (ALP) assignment protocol based on predictable channel condition is proposed. The channel condition is estimated by traffic density, signal to interference plus noise ratio and channel busy ratio. According to the prediction of channel condition, beacon broadcast interval, power and modulation coding scheme are assigned. Congestion is avoided by controlling these link parameters. Performance of ALP is evaluated in the OMNET simulation platform. Results show that: 1. Packet delivery rate and latency are guaranteed in both congestion and idle channels. 2. Broadcast coverage and successfully received beacons number are improved in idle channel. 3. Channel utilization is high while avoiding channel congestion.
Evaluation on the Social Benefits of Power grid enterprises’ Investment Based on the Fuzzy Matter-element Model
Authors: Lu Yan , Lv Ke , Yuan Jingzhong , Li Hongjian , Wu Luofei , Peng Sha
Published: March 2020

Bearing the major political responsibility of constructing, operating and developing the state power grid, and the important social responsibility of optimizing the allocation of energy and resources, guaranteeing the national energy security and promoting the development of the national economy, power grid enterprises should not ignore the social benefits when evaluating their investment projects. In this paper, the evaluation indicator system for the social benefits of power grid enterprises’ investment is constructed first, then the combination weighting method is used to assign weights to the indicators and the comprehensive evaluation on the social benefits is carried out after the comprehensive evaluation fuzzy matter-element is established.
Recent Insights into Plant-Pathogens Interactions through Proteomics Approaches
Authors: Wang Shanshan
Published: March 2020

Plants are vulnerable to adverse living conditions, frequently suffering from a variety of pathogens. A series of defensive events occur rapidly in plant cells, including complex biochemical and physiological responses. Several studies have been performed in plant–pathogen interactions researches. In this field of investigation, proteomics technology, has contributed to the understanding of pathogenicity strategies in pathogens, as well as the defence mechanisms in plants. Recently, the proteomics approach has drastically expanded due to some biological questions can only be addressed at the protein level. Its application is becoming a more powerful functional genomic tool and allows for a global perspective in plant–pathogen interactions. This review provides a brief overview of the current methods and progress of proteomics in the research of plant–pathogen interactions. In addition, relevant protein function and expression profiles are also reviewed.
Evaluation of acute colitis induced by dextran sulfate sodium in C57BL/6
Authors: Tang Hailin , Wang Jinke
Published: March 2020

Dextran sulfate sodium (DDS)-induced acute colitis in C57BL/6 mice is essential for several research aspects, but the inducing condition should be optimized with the purpose of different study. In this study, C57BL/6 mice drank water with 5 (w/v) % DSS dissolved for 7 days to induce acute colitis, which were evaluated from three aspects, including body weight change, colon length and histopathological changes. On day 8, the inflammation response to DSS treatment showed in the colon of C57BL/6 mouse. Compared with the control group, 5% DSS treatment decreased the weight of mice after drinking for 3 days, with Disease activity index (DAI) score corresponding to the pathological manifestations (p < 0.001). The colons were shorter significantly (p < 0.001) compared with control group. Partial colon of DSS-treated mice under H&E staining displayed severe inflammatory manifestations. In conclusion, this study constructed a successful acute colitis model, which can be a reference for others to do some studies related.
Proteomic profiling of salmonella under berberine stress
Authors: Wang Lei , Tian Ruxiang
Published: March 2020

Drug resistance of pathogen raises severe problems these decades since the antibiotic abuse. The need to explore the adaption mechanism of pathogens to antibiotic and develop new drugs is urgent. In this experiment, we explore the proteome of Salmonella enterica serovar Typhimurium under stress of berberine to study the adaption mechanism of S. Typhimurium to berberine. After proteomicanalysis, we found that energy metabolism-related proteins and flagellar proteinswere up-regulated and ribosome proteins were down-regulated under berberinepressure, revealing the potential mechanisms of growth inhibition of berberine to Salmonella. The possible inhiting mechanism include three parts: 1. The metabolismof S. Typhimurium was disturbed by Berberine; 2. Berberine has a negative effect on ribosomes of S. Typhimurium; 3. Berberine destroys the flagella of S. Typhimurium.
Form location and extraction based on deep learning
Authors: Zhang Zhen , Zhang Dengyin , Jin Tianyu , Zhang Min
Published: March 2020

To obtain users’ information on form images with different types and resolutions, a form location and extraction method based on deep learning is proposed in this paper. We adopt two classification models to better the detection accuracy: model A is applied to detect the smallest rectangular area containing the main information; model B recognizes users’ names, phone numbers and addresses. Especially, the proposed scheme with the certain anchor sizes and positive sample selecting method achieves 82.44% accuracy on the challenging dataset from reality.
Maximizing Revenue Resource Allocation Algorithm for Power Communication Network Service Providers
Authors: Li Zhi , Long Fangjia , Xia Hanlin , Zhang Jing
Published: March 2020

In order to improve the revenue of power communication network service providers, this paper first constructs a power communication network resource allocation model composed of self-built service providers, third-party service providers and demanders, and models resource allocation problems in power communication networks. Secondly, the Jacobi iteration formula of service capability is derived, and the optimal resource allocation algorithm of service provider is proposed. In the simulation experiment, it is verified that in the competing environment including the self-built service provider and the third-party service provider, the resource allocation of the power communication network has achieved Nash equilibrium in terms of service capability, and when the third-party service provider is introduced, the capital investment of network resources is reduced and the benefits of service providers is increased.
Cost Analysis Between Prefabricated Buildings and Traditional Buildings
Authors: Wang Shu , Zhang Hengchun , Wang Chan , Wu Yuanyuan
Published: March 2020

This paper analyzes the cost between prefabricated buildings and traditional buildings with examples, compares the cost difference between prefabricated buildings and traditional buildings, and analyzes the reasons for the cost difference, so as to provide a basis for its development.