bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on the adhesion between activated kaolin modified asphalt and mineral materials
Authors: Bao Huiming , Wu Chunyan , Zhang Yimin 
Published: January 2021

Abstract
The mass fraction of kaolin was 3%, 5%, 7%, 9%, 11%, 13% and 15%, respectively. The three indexes of kaolin were tested. The results showed that after kaolin was added, the penetration, softening point, ductility and deformation resistance of matrix asphalt were decreased. In addition, indoor adhesion test was conducted to analyze the adhesion of modified asphalt of granite and limestone with different kaolin contents, and the adhesion of modified asphalt in distilled water and 5%NaCl solution were compared. It is found that adding kaolin can improve the adhesion between asphalt and aggregate. Through a comparison of properties, it is suggested that the content of kaolin should be 5% rather than more than 7%.
A novel method for 3D reconstruction of blood vessels
Authors: Lu Shengyu 
Published: January 2021

Abstract
With the development of computer technology, computer-aided diagnosis has been greatly improved. Computer-aided diagnosis can help doctors diagnose with medical imaging and other technique. Cardiovascular disease(CVD) lead to death with high probability. The computer-aided toward blood vessel is necessary. In this paper, we propose a novel method for 3D reconstructing of blood vessels. We calculate the volume data of blood vessels using an implicit modeling method based on the scanned blood vessel images, and establish a 3D model for blood vessels. Compared with existing methods, our method can obtain the surface and internal information of blood vessels accurately based on the implicit function method. The experimental results reflect that our method can implement 3D reconstruction of blood vessels with high accuracy and smoothness.
Cellular response of biodegradable AZ31 magnesium alloy stent in artery
Authors: Wang Na , Li Kun , Zou Yongyan , Wang Jinguo 
Published: January 2021

Abstract
Because of the increasing incidence of coronary artery disease, the use of cardiovascular stents is gradually increasing. In percutaneous coronary intervention, advantage of bioresorbable stent is that the stent does not remain in the human body after completing the necessary mechanical support to ensure the blood vessel open, and finally degrades into harmless molecules. Compared with bare stents, which require long-term retention in the body, the incidence of restenosis in stent or late stent thrombosis was lower. Current biodegradable stent mainly include polymers, biodegradable stents and metal alloy stent. Magnesium-based stent degradation and its copolymers are used in the application of biological absorbable stents and attract the attention of researchers.
Application of Plasma Ignition in the Middle Storage-Type Lean Coal-fired Boiler
Authors: Lu Xiao , Wang Chaoyang , Du Jianqiao , Yan Xiaopei , Ma Hui , Jia Yonghui , Shi Yang 
Published: January 2021

Abstract
The paper introduces the realization process of a plasma burner in a middle storage-type lean coal-fired boiler from the aspects of cold leveling test, relevant logic optimization, cold pulverizing method, online monitoring of relevant parameters of the pulverized-coal feeding system and combustion adjustment and proposes corresponding measures for some problems in the plasma burner arising during adjustment. In the case of appropriate coal quality, the successful application of plasma in key links like steam blowing, air-cooled island hot flushing, and no-load test has saved a lot of fuel, presenting a good economic efficiency.
Detection of initial strain of main ribs of concrete beam (or slab) by bending moment increment method
Authors: Cheng Bo , Jiang Liping 
Published: January 2021

Abstract
In the inspection and identification of engineering structures, it is often necessary to understand the force state of the main ribs of the components. Based on the structural performance test, the relationship between the bending moment of the concrete beam (or slab) in the elastic phase and the plastic phase and the strain of the main rib is analyzed. The initial moment of the main beam of the concrete beam (or slab) is proposed by the bending moment increment method. By adding a small amount of bending moment and measuring the strain increment of the main rib, the initial strain of the main rib of the flexural member is estimated to better understand the structural performance of the member. During the bending moment increment detection process, the increase in bending moment is small and does not adversely affect the concrete structure.
Improving the Hot Corrosion Resistance of Nanostructured ZrO2-7wt.%Y2O3 Thermal Barrier Coatings Fabricated by Plasma Spraying
Authors: Wang Dongsheng 
Published: January 2021

Abstract
Conventional and nanostructured ZrO2-7wt.%Y2O3 thermal barrier coatings (TBCs) were prepared by plasma spraying technology. Microstructure and hot corrosion resistance of two TBCs in 75%Na2SO4+25%NaCl (mass fraction) mixed molten salt under 850 °C were compared. Meanwhile, hot corrosion failure mechanisms of TBCs were investigated. Results demonstrated that both conventional and nanostructured TBCs were typical lamellar stacking characteristic. However, compared with conventional TBC, the nanostructured TBC presented the base phase which is gained from recrystalization of fully melted nano-particles as well as the embedding phase of partially melted nano-particles. The nanostructured TBC has lower porosity and higher density. For both conventional and nanostructured TBCs, hot corrosion failure is caused by partial transformation of tetragonal phase (t-ZrO2) into monoclinic-phase (m-ZrO2) martensite as a response to the consumption of the stabilizer Y2O3. However, the nanostructured TBC generally has lower degree of hot corrosion and better protection to the metal bonding layer and matrix compared with conventional TBC.
Dried Biomacromolecule Nano-material Sampling and Characterization by AFM
Authors: Li Hongyu , Dong Chen , Wei Jiasi , Cai Xiaoyu 
Published: January 2021

Abstract
Nano-materials fabricated chemically or biologically are usually kept in liquid or solution. The characterization of these materials, especially about their dimensional scales, is important to the study of the materials as well as their further application. In this research, the dimensional features of a typical biomacromolecule nano-material are characterized by AFM in air mode and the uniformity is analyzed. Some dry samples are prepared for air mode measurement. The height of sample structure, h is (2.252±0.021) nm. The respective deviation of the overall structures’ heights and of the section heights in single structure is 0.023 nm, and 0.021 nm, which shows ideal homogeneity of the material and good uniformity of the structure.
Study on coal fly ash classified by bulk density
Authors: Feng Shuxia , Li Yanqi 
Published: January 2021

Abstract
As a major country with coal as its main energy source, China has great pressure on the production and reuse of coal fly ash. In this paper, three kinds of original low calcium fly ash from different regions were divided into five bulk density particle groups, < 1 g/cm3, 1-2 g/cm3, 2-2.5 g/cm3, 2.5-2.89 g/cm3 and > 2.98 g/cm3. The results showed that the bulk density of fly ash particles was mostly concentrated in 1-2.5 g/cm3. There were significant differences in the chemical composition and activity of the particle groups with different bulk density, but no consistent changes were observed. The correlation degree between acid oxide content and activity was significantly higher than that between bulk density and activity, indicating that acid oxide content had a significantly higher influence on activity than bulk density.
Characterization of Materials for Shape-memory and Biodegradable Ureteral Stent
Authors: Wang Na , Song Xuesong , Wang Jinguo , Hao Xiaomei 
Published: January 2021

Abstract
Ureteral stent is one of the commonly used instruments in urology, and its clinical efficacy is confirmed. However, there are also a series of complications or deficiencies, including infection after catheterization, formation of stent shell, and secondary endoscopy for tube extraction. The biodegradable ureteral stent can play the same role as the double-J tube, and it will be completely degraded after a certain time. The degradation fragments will be discharged with the urine, and the physiological functions of the ureter will not be affected. At the same time, there is no need to perform a second cystoscope for tube extraction. Therefore, patients do not have to undergo an invasive operation again, so as to alleviate the pain of patients and save time and cost.
Positioning Information System of Indoor Food Delivery Robot Based on UWB
Authors: Wu Peng , Wen Danli 
Published: January 2021

Abstract
In order to realize precise positioning with remote observation and control of the food delivery robot in the room. This paper designs a indoor robot positioning information system based on the DW1000 module and the network module of ESP8266. The improved TWR algorithm is used in the system to avoid the problem of clock out of sync among the base stations and improve the clock offset error of the base stations. The simplify Toa Algorithm makes the system locate quickly and accurately. At the same time, the wireless ethernet module ESP8266 is used to transmit the position data and the status information to the remote server which is easy to view the real-time position state and control the robot movement. The system is an embedded wireless interconnection system, which can satisfy the indoor robot positioning and information transmission, and realize the remote control of the robot.
Experimental study on the application of metamaterials in low frequency vibration reduction of thin plates
Authors: Li Hongwei , Wang Peng , Ren Weiwei 
Published: January 2021

Abstract
In order to validate the damping effect of metamaterials, the low frequency damping effect of the spring oscillator metamaterials was used to test the vibration of thin plates. And the damping effect was compared with the viscoelastic damping materials. The results show that, with lighter additional weight, the low frequency damping effect of the spring oscillator metamaterials for plate was better than that of the viscoelastic damping materials.
Calibration of WLI Lateral Indication Error with 2D Micro/Nano Pitch Standard
Authors: Wei Jiasi , Sun Kaixin , Cai Xiaoyu 
Published: January 2021

Abstract
White light interferometer (WLI) is one of the common machines that are used to characterizing surface structures. The indication errors of WLI are key metrologic characteristics, which may affect evaluation result of WLI. In this paper, a two-dimensional micro/nano pitch (2D pitch) standard is introduced to calibrate the lateral indication error of WLI. The calibrating experiments are carried out in four measurement positions. The results and the uncertainty is anlysized. And the expanded uncertainty of WLI in lateral measurement (x50) is evaluated as tens of nanometer.
The Study of Multivariate Fuzzy Neural Scheme in Controlling Temperature during Beer Fermentation
Authors: Zhang Zhao , Zhou Qi 
Published: January 2021

Abstract
The brewery fermentation process has inherence characteristics of multivariable, seriously nonlinear, uncertain, time-variant and large delay. The given process parameters aren’t traced very well. In this paper, segmented control strategy is used, which is dividing the ferment process into pre-fermentation and post-fermentation period. In each ferment period, strategy of fuzzy neural control based on Multivariate –decoupling is adopted and simulated in MATLAB, the results show the strategy’s validity and practicability in controlling beer ferment.
Study of shaking table substructure test loading by inertial mass
Authors: Ji Jinbao , Ding Zhen , Wang Chenguang 
Published: January 2021

Abstract
It is hardly to carry out large-scale shaking table test of entire structure for the high cost of model construction and the capability limited of shaking table in the field of civil seismic research. In this paper, a shaking table substructure test method loading by inertial mass was studied, and the inertial mass parameter was designed based on the principle of frequency equivalence. Numerical simulation was performed and the applicability of the test method was analysed. A shaking table test model of 5-stories steel frame model and the substructure test loading by inertial mass have been carried out. Result shows that the phase of the time history curves could in good agreement, but the peak responses of the substructure model were larger than the entire structure tests. So, the shaking table substructure test loading by inertial mass based on the principle of frequency equivalence is not suitable for the structure with uniform distribution of mass and stiffness. Finally, it has been verified that the substructure test based on the principle of frequency equivalence is suitable for the structures with large rigidity and concentrated mass by analysing of another example. The research of this paper could be referred for substructure test of large and complex structure.
A Case Study of Thoroughly Integrated STEM PBL Course of Mechanics
Authors: Guo Chong , Tang Yuehao 
Published: January 2021

Abstract
Along with the wide spread and deep penetration of STEM theory in China, the imperative task is to develop compatible courses with thorough interdisciplinary integration. The aim of this paper is to present a project-based learning (i.e., PBL) case study for college mechanics courses, in terms of the global structure, target analysis, activity design, comprehensive evaluation and implementation process. The features of this study can be summarized as follows. Firstly, in combination of students’ activity experience, the content of this study derived from a real-life problem truly realizes the interdisciplinary integration. Secondly, other than simply mixing the subject knowledge with hands-on skills, the objective of this study attaches specific importance to the stimulation of students’ interests and potentials in learning science and technology. Thirdly, the genuine research resources are adopted for implementing the project during the whole course. Fourthly, in order to urge students to form deep self-analysis, the course evaluation is composed of process and result assessments. In all, this study provides a reference for the development of an integrated STEM course. It may contribute to the acceleration of training professionals and construction of building innovation-oriented country.
Combustion synthesis of porous bismuth oxide
Authors: Wang Yajun , Li Shihui , Jiang Zisheng 
Published: January 2021

Abstract
Bismuth oxides with a micro porous structure were prepared by a simple combustion reaction between oxidizer (bismuth nitrate) and fuel (citric acid). These porous bismuth oxides were prepared at different values of the stoichiometric coefficient. The as-prepared products were characterized by X-ray diffraction (XRD), and scanning electron microscopy (SEM). The results show that many pores distributed in tetragonal bismuth oxides (β-Bi2O3) granules which have varied crystallinity and particle sizes at different oxidizer/fuel ratio. Increasing the fuel concentration improved the crystallinity and purity of β-Bi2O3. A further calcination could also increase the particle size, crystallinity and transform the phase structure from β-Bi2O3 to pure α-Bi2O3.
Analysis and Research on excavation deformation of deep foundation pit support engineering of metro station
Authors: Yuan Ye , Wang Yang 
Published: January 2021

Abstract
With the rapid economic and social development, the construction of urban underground rail transit is in full swing, and even many second and third tier cities are starting to build, In order to control the environmental impact of the excavation team and control the deformation, this paper takes a deep foundation pit project of a station in Wuhan Metro as the research object, combining with theoretical analysis, field monitoring and Midas GTS Nx numerical software simulation and other methods are used to discuss the ground settlement around the foundation pit, the impact on the adjacent bridge pile foundation, and the deformation control analysis.
Influencing factors analysis for algal blooms in cold region reservoir
Authors: Ashour Mohammed F. Y. , Guan Di , Zheng Guochen 
Published: January 2021

Abstract
This paper investigated the temporal variations of the phytoplankton biomass along 10 years in the Nierji reservoir located in the northeast of China. The factor analysis was applied to identify significant influencing factors of algal growth. The results demonstrated that total nitrogen (TN) was strongly correlated to phytoplankton in the middle of the reservoir and total phosphorus (TP) showed the same pattern in the outflow of the reservoir. In contrast, water transparency was weakly affected by the production of phytoplankton. Besides, there were annual variations observed for the ratios of TN to TP, while 54.02% of the collected data indicated that TP was limiting the phytoplankton.
Study on Degradation of Ureteral Stent Coated with Polycaprolactone Lactide
Authors: Wang Jinguo , Wang Na , Li Na , Han Wei 
Published: January 2021

Abstract
Ureteral stent has become a necessary consumptive device in the urinary system in the routine clinical practice. However, indwelled stent can cause complications such as hematuria, stone formation, and bladder irritation, et al. In recent years, the use of coating has become an important research direction to modify the surface of the stent and to reduce complications. In this paper, polycaprolactide lactide copolymer was used as coating material, uniformly coated the polymer on ureteral stent surface using solution impregnation method, so as to prepare ureteral stent with a certain coating thickness, and study the degradation behavior of coating in urine.
Analysis of Vibration Characteristics of Rotor Eccentricity for Generator in a Mobile Power Station
Authors: Li Xiaoquan , He Jiangjiang , Zhao Yuwei , Cheng Yuemeng 
Published: January 2021

Abstract
Due to machining accuracy, installation error and other factors, the rotor has various eccentricity, which will cause adverse effects on the operation of generator of certain mobile power station and even lead to all systems failure. In order to investigate the generator rotor’s vibration characteristics, taking a military mobile power station generator as the research object, a Jeffcott rotor model is established which considering rotor eccentricity with cubic term in this paper. It is consistent with the Duffing equation in any transverse motion equation. It is simplified to Duffing equation for solving. The analytical solution is solved by the Runge-Kutta method. By studying the effects of various types mechanical parameters on the transverse vibration, the rotor system’s main resonance is studied: the stiffness has extremely few effect on the amplitude change, however, the stability of the system changes greatly with them. While the amplitude only changes and the mass eccentricity reaches a certain value, the rotor system is prone to rub. Resonance amplitude, the response and phase of the system are all affected by the damping, therefore, damper is one of the most effective ways to suppress vibration of generator.
A Feedforward Decoupling Control Method for Multi-ports DC Transformer
Authors: Wu Hao 
Published: January 2021

Abstract
DC Transformer (DCT) is a new type of intelligent power electronic device using power semiconductors and high-frequency transformer to realize power conversion. Multi-ports DCT has broad applications in DC distribution networks. In this paper, the power transmission characteristics of the phase-shift controlled multi-ports DCT are analyzed. The non-linear coupling characteristics of the output power at different ports are also studied. The small-signal dynamic coupling model of the multi-ports DCT is established. On this basis, a feed-forward term is introduced and constructed in the closed-loop voltage control system. The theoretical analysis shows that the feedforward term can decouple the output voltage of different ports of the multi-ports DCT. The correctness of the feed-forward control method is verified by simulations.
Research on Non-intrusive Residential Electric Load Identification System Based on SOPC
Authors: Liang Yuzhe , Chen Hua , Xiang Qiang 
Published: January 2021

Abstract
The high-precision identification of the non-intrusive residential electrical load is an essential technology to realize the intelligentization of the power grid. Due to its low input cost and easy maintenance, this technology has received much attention at home and abroad. In order to improve the accuracy of load identification, this paper proposes a non-intrusive residential electric load monitoring equipment based on system on a programmable chip (SOPC), which is focused on hardware system design, characteristic parameters optimizing and BP neural network algorithm optimization. The feasibility of the system was verified by experimental simulation and tests. The results of experiment show that the method used for hardware design can not only improve the speed of system and most closely match the actual running state of electrical appliances in testing circumstances, but it can also realize the function of load identification rapidly and accurately under the condition of the given residential electricity.
Cause Analysis of Congested Pulverized Coal Dropping of Pulverized Coal Feeder in Storage Pulverizing System and Solutions
Authors: Wang Chaoyang , Lu Xiao , Du Jianqiao , Ma Hui , Jia Yonghui , Hao Qingzhe , Yan Xiaopei 
Published: January 2021

Abstract
The newly built unit in certain power generation company adopts storage pulverizing system and 16 sets impeller coal feeder. The pulverized coal feeders suffered unstable feeding frequently during infrastructure debugging, leading to large fluctuation of furnace negative pressure, steam temperature and load, and affecting safe and stable operation of the unit. This paper deeply analyzes the causes of congested feeding of pulverized coal feeder, formulates corresponding countermeasures from aspects of cleaning, installation and operation adjustment of pulverizing system, and guarantees stable operation of the unit through optimization logics and operation method. This paper provides references for actual operation and solution of similar problems in power plants.
Design of SOPC digital frequency meter based on MicroBlaze
Authors: Sun Haixin , Fan Yujie , Xiang Qiang 
Published: January 2021

Abstract
A method of SOPC implementation of digital frequency meter is presented in this paper. In the method, Encapsulated AXI IP core for frequency measurement and duty cycle measurement are configured with the embedded soft core MicroBlaze processor. The parameter measurement of the digital frequency meter is implemented by FPGA logic resources, and the measured data are transmitted to the soft core processor via AXI bus. The computation, control and display is completed by Microblaze soft core. The system is verified and tested on the Basys3 board card launched by digilent company. The results show that the system has the advantages of accurate measurement, good stability, simple scheme and low cost.