bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis on prefabricated construction technology of residence
Authors: Ting OuYang 
Published: June 2021

Abstract
After going through the initial, sustainable development and low tide stages, prefabricated buildings have ushered in a new development stage. In this paper, the development history, characteristics and advantages of prefabricated buildings are briefly summarized, and combined with the current construction technical points of residential prefabricated buildings, the key parts that construction enterprises should focus on in prefabricated construction are emphasized. At the end of this article, measures to improve the quality of prefabricated buildings are proposed from the macro perspective of the social environment and the micro perspective of the enterprise’s own development, so as to make a positive outlook for the development prospects of residential prefabricated construction.
Construction of BMP Education Reform Model Based on Multi-Element Information for Automation Teaching System
Authors: Huo Yan , Feng Li 
Published: June 2021

Abstract
With the arrival of the fourth industrial revolution, modern society is accelerating into the era of full intelligence automation. According to the requirements of new engineering construction, guided by the needs of advanced industry and economic development, combining theory education with practice training, a talent education model with general higher education and application-oriented teaching is constructed in this paper. The dynamic model is based on multi-elements including brain training, morality cultivation and practice improvement (BMP). The BMP model for automation teaching system combines the three elements to highlight the characteristics of modern application-oriented professional education, and provide reference for professional education system of automation technology.
Critical Speed Analysis of Rotor System of Sealing Machine
Authors: Gongwei GE , Huiliang Dai , Yitian Peng 
Published: June 2021

Abstract
The sealing machine is the key part of the copper pen tip processing machine, and its working stability will have a direct impact on the processing quality of the pen tip. Taking copper pen tip desktop processing equipment for an example, to improve the quality of pen tip, the modal analysis was carried out on the system by large-scale finite element analysis software ANSYS. The modal parameters of the rotor system were calculated, and through the Campbell diagram, the critical speeds of the system were obtained. Finally, the critical speed under different structural parameters is obtained. By analyzing data, the critical speed of the system is negatively correlated with the bearing spacing, and positively correlated with the diameter of the long shaft section, and independent of the bearing stiffness. The analysis results provide a theoretical basis for the optimization design of structural parameters of the system and the design of the maximum working speed, which also has certain reference value for the research and design of copper pen tip desktop processing equipment in China.
Design and Research of an Intelligent Medicine Box
Authors: Li Jiteng , Wang Luping , Qiu Jiyuan 
Published: June 2021

Abstract
In order to solve these problems, such as forgetting to take medicine, wrong dosage or type of medicine, an intelligent medicine box is designed. The intelligent medicine box is composed of a piston dispensing mechanism, a platform moving mechanism and a main body mechanism, etc. Close cooperation between various parts, realize the functions of storing medicines, automatically dispensing medicines, intelligent reminders, intelligent detection and intelligent sterilization. Through the simulation in solidworks, the mechanical performance simulation analysis. The results show that the deformation of the crank is very small during the whole process of dispensing medicines, there is no concentrated stress, and it has no effect on the dispensing efficiency during the dispensing process. The designed intelligent medicine box is not only for the elderly, but also suitable for all kinds of people. It can promptly remind patients to take drugs, reduce the occurrence of problems such as wrong medication and forgetting to take drugs. It is user-friendly in design, simple and convenient to operate, helps smart medical treatment, eases the pressure of medical care, and has good market application value.
Influence of impeller clearance structure on volume loss of centrifugal pump
Authors: Xiaolang Lu , Xiang Chen , Fukang Fu , Wei Jiang , Shuang Li 
Published: June 2021

Abstract
In this paper, the three-dimensional full flow field model of double volute structure centrifugal pump is established, and the ring seal, teeth seal and interlocking seal structures are set up. The K-e turbulence model of CFX software is used to simulate and analyse the fluid flow state at the gap of different mouth ring structures of centrifugal pump. The results show that the staggered ring structure can effectively reduce the leakage and improve the volumetric efficiency of centrifugal pump.
Research of Vibration Characteristics of Ship Propeller-shaft Longitudinal Two-stage Vibration Isolation System
Authors: Quanchao Li , Rui Zhou 
Published: June 2021

Abstract
Aiming at the vibration control problem of ship propeller-shaft system, this paper put forward a design approach of ship propeller-shaft longitudinal two-stage vibration isolation system and its dynamic characteristics are studied. The vibration mathematical model of ship propeller-shaft longitudinal two-stage vibration isolation system is established. The influence of mass ratio, stiffness ratio and damping ratio of two-stage vibration isolation system is studied. The design is optimized taking a ship propeller-shaft system as an example. The results show that the ship propeller-shaft longitudinal two-stage vibration isolation system which is optimized has better isolation effect than the single-stage vibration isolation system. The research results have important reference value for ship propeller-shaft longitudinal vibration isolation design.
Research on Arrhythmia Classification Method Using Optimized Probabilistic Neural Network
Authors: Junkong Liu , Lili Li , Yipin Fang , Jinyu Su 
Published: June 2021

Abstract
Aiming at the classification difficulty of complex and diverse ECG signals, this paper proposes a feature extraction method based on standard deviation. This method solves the problems of multi-dimensional, diverse, high similarity and the difficulty in extracting main features effectively of ECG(electrocardiogram, ECG) signal features. In addition, this method overcomes the difficulty of low classification accuracy because of large differences in ECG signals of the same type among different patients. This paper adopts optimized probabilistic neural network methods to achieve automatic classification of arrhythmia. First, the standard deviation of the dimensions of each sampling point of the ECG signal would be calculated and sorted by size. Second, the first m dimensions as the feature dimensions of arrhythmia would be extracted. After that, the probabilistic neural network would be used to train and classify feature dimension data. Finally Bayesian Optimization(BO) method would be used to optimize the parameters globally. In the experiment of the MIT-BIH arrhythmia database, the arrhythmia data was divided into 5 categories and verified, experimental results show that the correct rate of classification of the arrhythmia data of patients reached 99.67%, which proved the effectiveness of the method in this paper.
Research on Automatic Positioning Control System of Riprap Barge
Authors: Hua Xiaotao , Liu Yan , Sun HaiYang 
Published: June 2021

Abstract
Based on the research of ship automatic positioning technology and deviation correction technology, combined with the gravel laying technology of single ridge subgrade bed of immersed tunnel, the control strategy of riprap barge is determined: ship automatic positioning technology based on tension control and rope length control. Combined with the gravel laying technology of single ridge subgrade bed and the control strategy of riprap barge, the algorithm of automatic positioning and moving of riprap barge is studied. Combined with the engineering practice, control strategy and control algorithm, the intelligent anchoring positioning control system is designed to realize the high-precision and fast intelligent displacement of gravel bed laying ship.
Safety Analysis of THAAD Anti-Missile System Launcher
Authors: Junhui Tang , Huiming Shen , Jintao Wang , Wenli Yu , Tao Wang , Guiyun Hang , Peng Wang 
Published: June 2021

Abstract
Safety analysis is a very important link in the assessment of damage effect before combat operations, and it is also the premise of war damage assessment of weapon targets. This paper takes the launcher of THAAD anti-missile system as the research object, analyzes the structure and functional characteristics of the launcher of THAAD anti-missile system based on literature, reconstructs the three-dimensional model of the launcher, classifies its damage grade, and defines the key vulnerable parts of the launcher. Taking the fragment detonation warhead as an example, the failure mode and damage grade of the key vulnerable parts under the action of fragments are analyzed, and the K and F damage tree models of the launcher of the THAAD anti-missile system are constructed, which provide reference for the security evaluation and research of the THAAD anti-missile system.
Structural Engineering Analysis for a Control Moment Gyroscope Framework
Authors: Xiu Tian , Yue-dong Lang , Xin-xiao Lai , Er-yong Hou 
Published: June 2021

Abstract
The framework structure of a control moment gyroscope (CMG) system was regard as a research object, which stiffness and vibration mode was analyzed by ANSYS finite element method software, so that its static and modal characteristics under a large load were obtained. And according to the analysis results, its structural optimization design was implemented to meet the requirements of structural characteristics in the frame system. The results of optimized analysis showed that the structure strength and dynamic characteristics were enhanced obviously, which verified the necessity and reasonability of engineering analysis for the structural design. Therefore, it can provide a theoretical basis for system design.
Research and application of the potential tapping method of single sand body in a high water cut period
Authors: Yao Yuqing 
Published: June 2021

Abstract
This paper studies the reservoir sedimentary system of an oilfield, grasps the origin and characteristics of sand development in narrow and small river channels, and uses the method of sandstone facies determination to track and predict sand bodies, and establishes the continuous distribution mode of channel sand bodies. On this basis, combined with the dynamic monitoring data, the type and potential of remaining oil in the oilfield are analyzed by using the dynamic analysis method, and five potential tapping directions centered on the channel sand body are determined. The practice shows that the remaining oil analysis based on the anatomy of single sand body should be paid more attention to in the exploration of potential in high water cut period. Combined with various technical means such as reinjection, encryption and orientation, the injection production relationship of single sand body should be improved and the field application has achieved good results.
Experimental study on the effect of stone powder content on the plastic shrinkage of self-compacting concrete at early age
Authors: Wang Hui , Bai Ziyun , Zhao Jiaxing , Li Kai 
Published: June 2021

Abstract
To investigate the effect of water-cement ratio and stone powder admixture on the plastic shrinkage performance of self-consolidated concrete by measuring the shrinkage deformation within 24 hours after casting through non-contact shrinkage test. The test shows that the larger the water-cement ratio and the higher the stone powder admixture, the larger the early-age shrinkage value; the early-age shrinkage growth rate is mainly affected by the water-cement ratio, and the early-age shrinkage growth rate tends to level off later for small water-cement ratio; the effect of stone powder admixture on different water-cement ratios is slightly different, and the increase effect of stone powder admixture on early-age shrinkage is more obvious under the high water-cement ratio condition.
Experimental analysis on dynamic characteristics of unsaturated sericite schist residual soil controlled by different factors
Authors: Li Chongyang , Zhang Qingwen 
Published: June 2021

Abstract
Taking sericite schist residual soil widely distributed along Dalin Railway as the research object, the resonance column test of sericite schist residual soil in unsaturated state was carried out, and the dynamic shear modulus Gd under different water content, dry density and consolidation confining pressure in small strain range (10−6 < γ
d < 10−4) was studied. The test results show that water content has a great influence on dynamic shear modulus, followed by dry density and consolidation confining pressure. Gd increases non-linearly with the increase of water cut, and there is a certain critical water cut that makes Gd reach the maximum, and then Gd gradually declines with the increase of water cut; D ∼ γ
d curves tend to overlap under high confining pressure and high water content. Under the same dynamic shear strain amplitude, Gd increases with the increase of dry density. Under different consolidation confining pressures, the increasing of Gd follow-up shear strain γd tends to decrease.
Application and Seismic Analysis of changing masonry structure into bottom frame structure
Authors: Dou Pengfei , Xu Xinsheng , Liu Yujiao 
Published: June 2021

Abstract
In order to meet the requirements of people for the use of large space, the masonry structure building is underpinned, the load-bearing wall of the building is removed, and the underpinning beam is constructed to replace the original load-bearing wall to bear the upper load, the bottom masonry structure is transformed into a large space frame structure. Based on the analysis of two different underpinning methods, this paper selects the structural underpinning method according to their advantages and disadvantages, and takes an example as an example to summarize the construction of underpinning beam structure first. Then the main construction methods and matters needing attention of the underpinning technology for removing the load-bearing wall in the construction process, so as to provide a certain basis for the future construction of the structure. Through the displacement loading method, the bearing capacity of frame beam and underpinning beam is analyzed, and the data are processed, and the advantages and disadvantages of underpinning beam and frame beam under load are obtained.
Influencing factors of measurement results of polished stone values of coarse aggregates
Authors: Dou Guangwu , Zhou Yishu , Zhang Yaojun , Liu Yue , Guo Hongbo , Zhang Jinning 
Published: June 2021

Abstract
The polished stone value (PSV) of a coarse aggregate indicates its ability to resist the polishing action of tires. In the measurement tests of PSV of coarse aggregates, due to the complicated process, artificial factors or instrumental performances may cause measurement deviations. In order to explore the influences of instrumental factors, based on the features and working principle of a pendulum friction coefficient tester, the main influencing factors were firstly analyzed and then experimentally verified through measuring PSV of andesite and basalt. With the one-variable linear regression method, the testing data were fitted in order to determine the variations of the PSV of coarse aggregates with the hardness of rubber strip used in the slider block and the axial deformation distance of the slider block corresponding to the maximum positive static pressure on the tested surface. With the increase in the hardness of rubber strip, the measured PSV increased. With the increase in the axial deformation distance of slider block corresponding to the maximum positive static pressure on the tested surface, the measured PSV decreased. The quantitative analysis of the factors affecting PSV can improve its determination accuracy.
Research on the application of consumer UAV in river and lake demarcation
Authors: Zhu Wei , Zhang Zhuanzhuan , Wang Ze 
Published: June 2021

Abstract
The delimitation of rivers and lakes is the basis for clarifying the management scope and protection scope of river courses and lakes, and implementing the property right system of natural resources and effective management of natural ecological resources. The development of UAV low altitude photogrammetry technology provides a strong support for river and lake demarcation in terms of cost, efficiency and quality. In this paper, the reliability of the data in the test area is verified by selecting the project test area, and the feasibility of the application of consumer UAVs in the river and lake demarcation project is obtained, which provides some technical reference for the application of consumer UAVs in engineering projects.
Spatial-temporal variation of NDVI and its responses to precipitation in the upper of Heihe from 2000 to 2019
Authors: Xuefei  , Liujie  , Guotao Dong , Huazhu Xue 
Published: June 2021

Abstract
As the direct result of climate change, Spatio-temporal variation of vegetation cover is an important index in regional ecological change. Based on Google Earth Engine, MODIS-NDVI and precipitation of TRMM from 2000 to 2019 were extracted. Trend analysis method and PCCs were applied to explore the different scales temporal and spatial change of NDVI and the relationship between NDVI and precipitation in the upper of Heihe River Basin. It was found that the annual change of vegetation increased slowly in the study area, and correlation of vegetation NDVI with precipitation are insignificant. On month scale, the vegetation change was cyclical, there was a noticeable increase from June to September, but from November to next February, the vegetation coverage was the lowest, the change of precipitation had the similar variation pattern, and there was a strong positive correlation between precipitation and NDVI. In terms of spatial change, the NDVI rose generally from northwest to southeast, vegetation coverage in northwest was improved.
A New Method for Estimating High Frequency Attenuation Parameter of Kappa
Authors: Ji Yuan , Haiyun Wang 
Published: June 2021

Abstract
The Fourier amplitude spectrum of acceleration will drop rapidly in the high frequency range. Anderson and Hough quantitatively studied the attenuation law of the acceleration Fourier spectrum above the corner frequency, and proposed the high-frequency attenuation parameter Kappa ( ) to describe this phenomenon. It has important applications in the field of engineering earthquakes, and is widely used by seismologists and engineers in the work of ground motion simulation and attenuation relations. Based on the Anderson method, this paper proposed a method of first smoothing the Fourier acceleration spectrum with a 0.4 Hz Parzen window and then fitting the solution value. The Fukushima earthquake data from Japan’s KiK-net seismic network on February 13, 2021 was used to verify the reliability of the method. The results showed that when the width of the Parzen window was set to 0.4 Hz, the calculation accuracy of the value was effectively improved.
Application progress of digital technology in the protection of Chinese traditional villages
Authors: Wu Yajie , Huang Chunhua 
Published: June 2021

Abstract
As a new trend of cultural heritage protection, digital technology has brought opportunities and challenges to the detection, protection and development of traditional villages. First, this article introduces the specific application of digital technology in the three stages of data collection, information processing and display and dissemination, and constructs the corresponding integrated application diagram, then summarizes the implementation obstacles in the protection process. Finally, a prospect is made for the development of digital protection of traditional villages. The results show that digital technology can provide a strong data foundation and flexible processing methods for the storage, restoration, display and dissemination of traditional village protection, and promote the transformation of single technology to multiple integrated applications.
Loss of basigin expression in uterine cells leads to subfertility in female mice
Authors: Li Kailiang , Li Quanxi , Bashir Shah Tauseef , Bany Brent M , Nowak Romana A 
Published: June 2021

Abstract
Basigin (BSG) is a transmembrane glycoprotein involved in cell proliferation, angiogenesis, and tissue remodeling. BSG has been shown to be essential for male and female reproduction although little is known about its role in normal uterine function. To study the potential function of BSG in the female reproductive tract, we generated mice with conditional knockout of Bsg in uterine cells using progesterone receptor-Cre and hypothesized that BSG is required for normal pregnancy in mice. Fertility study data showed that the conditional knockout mice had significantly reduced fertility compared to controls. Ovarian function of the conditional knockout mice appeared normal with no difference in the number of superovulated oocytes collected or in serum progesterone levels between the conditional knockout and the control mice. Uterine tissues collected at various times of gestation showed increased abnormalities in implantation, decidualization, placentation, and parturition in the conditional knockout mice. Uterine cross sections on Day 5 of pregnancy showed implantation failure and abnormal uterine epithelial differentiation in a large proportion of the conditional knockout mice. There was a compromised decidual response to artificial decidualization stimuli and decreased mRNA and protein levels for decidualization genes in the uteri of the conditional knockout mice. We also observed altered protein expression of monocarboxylate transporter 1 (MCT1), as well as impaired angiogenesis in the conditional knockout uteri compared to the controls. These results support that BSG is required for successful pregnancy through its functions in implantation and decidualization.
Thinking Beyond Extremism: A Critique of Counterterrorism Research on Right-Wing Nationalist and Far-Right Social Movements
Authors: Tetrault Justin Everett Cobain 
Published: June 2021

AbstractResearchers increasingly use counterterrorism approaches to explain how right-wing groups mobilize as a growing social movement. I reveal the limits of security-oriented research for studying right-wing movements using a semi-ethnographic case study of the Canadian yellow vests. Dominant security narratives paint Canada’s yellow vests as foremost a criminogenic and violent white nationalist movement. My findings, however, suggest that these groups (1) fetishize law and order; and (2) attempt to maintain legitimacy by rejecting vigilantism and policing extreme messaging. Fixating on the ‘extremism’ and criminal risks of right-wing movements can distort analysis and exaggerate their distance from mainstream culture. My data include over 40 h of participant-observation at 20 right-wing rallies and 35 interviews with current leaders and members of on-the-ground nationalist groups.