bluuebunny/crossref_metadata_2025_split huggingface dataset:
On Optimization Design of Sunshade Components for Qinba Mountain Buildings
Authors: Zhu Yiyun , Wang Xianling , Fan Xiaona 
Published: January 2021

Abstract
Improving indoor thermal comfort and reducing building energy consumption are the main ways to realize sustainable development of buildings. In view of the phenomenon of indoor overheating in traditional buildings in Qinba mountain area in summer, it was proposed to add sunshade components to the south-facing Windows for improving indoor thermal comfort. Ecotect software was utilized to study the influence of common shading components and shading louvers under different parameters on solar radiation in the south-oriented window. The results demonstrated that the shading louver has the best shielding effect on the integrated radiation. Finally, ANSYS.CFX was used to study the influence of shading louvers with different blade widens and angles on natural ventilation. Considering the influence of louver parameters on radiant heat gain and natural ventilation, it was recommended to choose louvers with a width of 200 mm and an Angle of 30°, which can effectively block 70% of the solar radiation heat gain of the south window and increase the ventilation potential by up to 15%.
The influence of the high-pressure rotary jet formed sealing curtain on the stability of plug-in steel cylinder
Authors: Liu Wenbin 
Published: January 2021

Abstract
The plug-in steel cylinder was widely used for man-made island construction as the bulkhead wall in nearshore soft soil area. In order to maintain the dry working condition inside the bulkhead wall, the high-pressure rotary jet formed sealing curtain should be built up under the steel cylinder and the connecter between steel cylinders. During the dewatering process inside of the bulkhead wall, a water pressure difference between the inside and the outside of the bulkhead acts on the steel cylinders. This water pressure difference threatens the stability of steel cylinders, even leads to the crash of the steel cylinders when the steel cylinder was installed on the high-permeability soil layers. This paper analyzes the seepage field and the displacements of the cylinder during the dewatering process according to data from an engineering case, and highlights the effect of high-pressure rotary jet formed sealing curtain on maintaining the stability of cylinder.
Study on Speciation Chemical Analysis of Rare Earth Elements in Soil Based on Green Environmental Technology
Authors: Fu Yao , Lou Lianxin , Hu Ximeng 
Published: January 2021

Abstract
The impact of rare earth elements on the soil environment is not only related to its total amount, but also more closely related to its chemical form. The green and environmentally friendly acid digestion and morphological continuous extraction methods were used to extract and analyze the total amount of rare earth elements and the forms of rare earth elements in the soil samples. Inductively coupled plasma mass spectrometry was used to determine the content of rare earth elements and the content of rare earth elements in the soil samples. Form content. The results show that the content of rare earth elements in the collected soil samples is 200-1418mg/kg, and the content of light rare earth elements is much higher than that of heavy rare earth elements; the recovery rate of the sum of the combined forms of rare earth elements relative to the total amount is 88.2% to 110%, indicating that the continuous extraction method is suitable for the analysis of rare earth elements in soil samples. The rare earth elements in soil samples mainly exist in the residue state, which is 33%-80%; the co-precipitation state of crystalline iron and manganese hydroxide is 10%-31%; the adsorption state of humus and amorphous oxide is 5.0%-18%; The exchange state and the carbonate combined state are 4.0% to 23%; the amorphous iron-manganese oxide co-precipitation state is less than 3%. The influence of the location of the sampling point and the nature of rare earth elements on the content of rare earth elements was analysed, and the influence of soil properties on the distribution of morphology was discussed.
Numerical Study on the Structural Safety of the Slideway Project in a Mountainous Tourist Attraction
Authors: Guo Yanhui , Yang Yi , Yang Zhiquan , Ao Fuxing 
Published: January 2021

Abstract
In order to study the safety of the slide way in a mountain eco-tourism scenic spot, based on the actual design parameters of the slide, a three-dimensional mechanical simulation model was established by numerical simulation method, and the stress and displacement distribution of the slide after its completion were calculated under the condition of self weight and load. The results show that after the construction of the slide way, the maximum principal stress of the slide is mainly compressive stress, which is beneficial to the performance of the main steel structure. The displacement in three directions is small, and the reliability of each component meets the requirements. After the slide is put into use, the maximum principal stress increases with the consideration of human load, which does not exceed the allowable stress value of the structure. The displacement of the slide in three directions is small, which shows that the reliability of each component is good under the condition of human load in the service stage, and basically meets the requirements of use. The research results have important reference value for the safe operation of the slide.
Research on Prediction of Metro Surface Deformation Based on Ensemble Kalman Filter
Authors: Li Zengxin , Luan Yuanzhong , Liang Yaodong , Ji Zhaolei 
Published: January 2021

Abstract
In order to improve the prediction ability of the statistical model of the subway surface deformation, the equal-dimensional innovation grey system theory model and Kalman filter model are used to predict the surface deformation of the subway. The ensemble Kalman filter (EnKF) algorithm is used to assimilate the two groups of prediction data to improve the accuracy of the prediction data. The absolute difference and the root mean square error between the EnKF assimilation prediction data, the Kalman filter prediction data, and the equal-dimensional and innovation grey model prediction data and the measured data are compared and analysed. The results show that the accuracy of EnKF assimilation prediction data is greatly improved compared with the prediction data of grey system theory model and Kalman filter model, and the short-term prediction effect is better.
Calculation of Damage Caused by Blasting Vibration on Surrounding Rocks of Water-conveyance Tunnel across the Yellow River
Authors: Zhou Xianqi , Ye Jinbi , Chen Feng , Wang Bowen 
Published: January 2021

Abstract
The commonly used method for tunnel excavation is the drilling and blasting method, but the surrounding rock will accumulate damage under the action of blasting, leading to engineering accident, and the consequences of the accident in the Yellow River-crossing tunnel will be more serious. The work proposed a quantitative evaluation calculation of the damage on surrounding rocks caused by tunnel blasting excavation to study the effect of tunnel blasting on the damage of surrounding rock. analyzes the damage plasticity model theoretically, and determines the rock constitutive curve used in the numerical calculation of vibration damage, based on which plane physical model is established to adopt several different stress control standards to calculate the vibration damage of surrounding rock. The results proved that in the damage settlement of planar model 1, the damage variable around the tunnel was 0.14 at the maximum and 0.10 at the minimum. In the curtain grouting area, the maximum damage variable was 0.05, and the minimum was 0.01. In the damage settlement of planar model 2, the damage variable around the tunnel was 0.45 at the maximum and 0.05 at the minimum. In the curtain grouting area, the maximum damage variable was 0.20, and the minimum was 0.05.the impact of blasting vibration on the surrounding rock is mainly concentrated near the cavern, Thus, with the rock depth increasing, the damage decreased. the damage in the grouting curtain area is relatively small. The results accurately reflected the damage caused by blasting vibration on surrounding rocks and provided references for engineering construction.
Study on the Maturity of Construction Technology in China
Authors: Ke Yanyan , Qiu Yimin , Yang Zhengyu 
Published: January 2021

Abstract
The development and application of construction have two sides, advanced technology may lead to efficiency improvement and performance improvement, but may also because of the lack of technology itself, resulting in economic losses, security risks, ecological damage and other negative effects. Based on the CMM model, the paper takes construction technology as the research object, constructs the construction technology maturity evaluation system, and takes the data of the National Bureau of Statistics from 1999 to 2018 for nearly 20 years as the analysis sample to evaluate the construction technology maturity grade. On this basis, the paper puts forward some suggestions to improve the maturity of construction technology.
Research on Risk Assessment Index System of Expressway
Authors: Xiong Zhiye , Zhuang Yufeng , Hu Yanzhu , Wang Song 
Published: January 2021

Abstract
The safety of road infrastructure is the basis for safe operation of roads, and expressways, as high-grade expressways between freeways and non- freeways, involve roads, bridges, tunnels, traffic safety facilities and other infrastructure. Therefore, constructing a risk assessment index system for expressways is a prerequisite for the safety management of expressway operations, which helps to transform "passive processing" into "active prevention". In order to establish a comprehensive and systematic expressway risk assessment system, this paper from the perspective of systems engineering, uses the Interpretive Structural Modelling method to construct many risk factors of the expressway into a causal and hierarchical structure model. For solving the shortcomings of the poor accuracy of the subjective analysis method and the lack of interpretability of the objective analysis method, this paper adopts an improved subjective and objective analysis method to give weight to the indicators at various levels. So as to improve the scientificity of the risk assessment system of the expressway.
Research and application of solid-liquid dual material sand control technology
Authors: Li Huaiwen , Liu Wei , Shao Lifei , Wang Xiaofang , Wang Chao , Yan Yongwei 
Published: January 2021

Abstract
A new type of solid-liquid dual material artificial shaft wall sand control technology was developed for some special Wells (such as sidewall drilling, causing damage repair well, etc.) with low construction pressure and unsuitable mechanical sand control technology in dagang oilfield. The process is use solid and liquid mixing resin solution pump into the formation to form a complete artificial borehole wall, solid material filling the cavity of formation, act as proppant. Liquid as resin bonding agent, used for cementing solid material and formation of particles sand. In addition to evaluate the solid liquid double material of various performance indicators. Field test shows that this technology can be consolidated at well temperature, and the compressive strength can reach 8Mp and permeability can reach 1 μ m2 after consolidation. This technology has been successfully applied to sand control in 5 Wells in dagang oilfield and achieved good sand control effect.
Structure Design of Cable-Stayed Bridge Intelligent Detection Robot
Authors: He Hongyu , Hu Guichuan , Ren Jing , Hu Jing , Zhao Hang , Nie Tao 
Published: January 2021

Abstract
Cables are the main load-bearing components of cable-stayed Bridges. The durability and reliability of cables are directly related to the safe operation and service life of the whole bridge. Aiming at the problem of cable detection and maintenance, a new type of cable detection robot is designed in this paper. To further enhance the stability of the robot, the structure adopts symmetrical arrangement to make the center of mass of the robot system coincide with the cable axis. According to the working condition of the robot, a flexible body spring that meets the parameter requirements is designed, which not only meets the required preload, but also meets the starting torque of the motor. The robot is simple in structure, standardized in parts, easy to assemble and disassemble, and has good obstacle clearance ability and detection efficiency.
Application of multiple combination retaining structures on high slope
Authors: Yang Yixin , Ye Jinbi , Hong Chuanxiong , Chen Chaozi , Mao Lanyu , Lai Yili , He Xiaoli , Lian Liyu , Fang Yihang , Lian Jianbin 
Published: January 2021

Abstract
With the increase of the height of the filled slope, the application of multiple combination retaining structures (MCRS) is becoming more and more popular. However, the traditional design methods seldom consider the coupling effects between the substructures. To investigate the interaction of MCRS, this paper takes the filled slope project of a middle school in Quanzhou City, Fujian Province, China as an example. The filled slope was supported by MCRS, including reinforced soil, doublerow piles, anchors and counterfort retaining walls. The simulate procedure mainly included the following process: first, the MCRS model was established, then the mechanical response of the MCRS when replacing the fill materials and increasing the length of the rear row piles were obtained, and a comparative analysis was carried out. The following conclusions could be drawn: (1) The properties of backfill material have a significant impact on the displacement of backfill slope, and when the backfill is gravel soil, the displacement of slope can be controlled to a satisfactory degree. When the back-fill soil is replaced by silty clay, the shear strength and internal friction angle of soil become smaller, thus the displacement of slope increases significantly, which may lead to slope failure. (2) When the anchorage length is satisfied, increasing the length of the rear row pile has no significant effect on reducing the displacement of MCRS slope, but it can effectively reduce the axial force of anchor rod. (3) In MCRS, each substructure has complex interaction, and numerical simulation provides an effective means for accurate evaluation of MCRS.
Research on Intelligent Loading System for Container Ships
Authors: Wu Qingcai , Xia Qiucheng , Wu Maochuan 
Published: January 2021

Abstract
Container transportation is an important part of the global transportation industry, and its transport capacity affects the development of the global economy to a certain extent. Ship stowage is an important part of container transportation. Its intellectualization level determines the time of container ships in port and the frequency of overturning containers, thus affecting the efficiency and economic benefits of ship transportation. Based on the container ship stowage process, this paper analyzed the factors affecting the stowage, focused on the study of the composition of intelligent stowage system, and provided a safe and reliable idea for the construction of container ship stowage system.
Assessment and Early Warning of Geo-Environmental Carrying Capacity: A Case Study of Tianjin Binhai New Area, China
Authors: Miao Jinjie , Ma Wuming , Cui Kaipeng , Wang Zhiqiang , Zhang Ying 
Published: January 2021

Abstract
The geo-environmental carrying capacity (GCC) is to provide a scientific method for government to make a reasonable strategic decision for the land use planning and distribution of industrial structures. In this paper, the assessment indicators system and the assessment model of geo-environmental carrying capacity (GCC) based on the System dynamics (SD) theory were established for a case study of Tianjin Binhai New Area, China. Then the assessment model was applied to the land use planning of the study area. The results show that about 15 percent over loading sub-areas was eliminated in the Tianjin Binhai New Area by land use re-planning and adjustment of industrial structures. The study proposed a new method for the assessment and early warning of the geo-environmental carrying capacity.
Approbation of the data classification method based on the SVM algorithm and the k nearest neighbors algorithm
Authors: Demidova L A , Sokolova Yu S 
Published: January 2021

AbstractThe aim of the work is to test the classification method based on the combined use of SVM andkNN classifiers. At the first stage of the classification method, on the basis of the initial training dataset U, SVM classifier is developed and the width of the Ω area is determined. This Ω area contains all objects incorrectly classified by SVM classifier, which form together with correctly classified objects that have fallen into the Ω area and the corresponding object class labels from the Ω area a new datasetG. At the second stage of the classification method, thekNN classifier developed on the basis of information about the objects of the setU\Gis applied to all objects of the datasetGfrom the Ω area. The values of the parameters of thekNN classifier are determined experimentally in such a way as to ensure the highest possible accuracy of object classification. Since the correctly classified objects can also enter the Ω area formed in the above way, the condition for the applicability of the proposed method is a general improvement in the classification quality. The presented results of experimental studies confirm the effectiveness of the proposed method in the problem of classifying complex multidimensional data.
Technology for aerodynamic wake characteristics measurement behind an aircraft on a rail-guided track
Authors: Golovnev I G , Vyshinsky V V , Sokolov O V , Lapshin K V , Mukhachev P A 
Published: January 2021

Abstract
A framework for vehicle wake vortexes experimental investigation on a rail-guided track in sub- and supersonic flows is presented. Basic requirements for measurement system and results treatment are determined based on numerical modeling and wind-tunnel tests.
Hovering control algorithm validation for a mobile platform using an experimental test bench
Authors: Jatsun S , Emelyanova O , Lushnikov B , Martinez Leon A S , Mosquera Morocho L M , Pechurin A , Nolivos Sarmiento C A 
Published: January 2021

Abstract
This paper deals with the validation of a hovering control algorithm for a mobile aerial platform executed on a quadcopter pattern. In order to test and evaluate the proposed hovering algorithm in a safe and controllable environment conditions, an experimental test bench has been introduced. As part of the hovering control algorithm implementation process, a brief description of the dynamics and control laws of the quadcopter is presented. The considered control technique in this paper is based on PID control method. A program code has been written using Arduino IDE based on Arduino UNO microcontroller. A description of the conducted indoor experiment for the validation of the hovering algorithm, and also the main results of the performed practical experiment are presented
Layered composite for a geopolygon mire
Authors: Kondratov A P , Zhuravleva G N , Syltanova Y M 
Published: January 2021

Abstract
We have investigated flexible composite materials of test objects (mires) intended for setting the aviation optical equipment for remote sensing of the Earth. The brightness fields and control images of the mire contrasting elements are obtained by the method of ink-jet printing on banner fabric. We have proposed a new layered structure of the material for the operating contrast control. We have established quantitative patterns of changes in the optical characteristics of test objects when using an outer layer made of a transparent polymer film, which makes it possible to vary the characteristics of test objects for adjusting thermal imaging devices and aviation optical equipment using low-cost polygraphic methods.
Mathematical foundation of system design regulatory controls based on ARP4754A
Authors: Kulabukhov Vladimir 
Published: January 2021

Abstract
The article provides an interpretation and formal mathematical foundation in the language of modern algebra for V-process of designing complex systems recommended by the ARP4754A manual, in the context of a new paradigm in mathematical systems theory developed on the basis of the General principle of isomorphism. This provides a scientific basis for the widely used design approach
Analysis of post buckling state of composite rectangular panel with asymmetric structure on elastic base caused biaxial compression
Authors: Mitrofanov O , Klesareva M 
Published: January 2021

Abstract
Received analytical solution of geometrically nonlinear problem for investigation of post buckling of composite rectangular panel with asymmetric structure on elastic base. Panel deflection corresponds to conditions of rigidity support. Considered longitudinal compression of panel subject to constraint along the longitudinal edges which corresponds panel loading caused biaxial compression. Results can be used in the analysis of post buckling thin defects such as delaminations in laminated skins.
Post-buckling behavior estimation of composite panels of asymmetric structure with all-boundary rigid support with shear flows action
Authors: Mitrofanov O , Osman M 
Published: January 2021

Abstract
Analytical solution of geometrically non-linear problem of post-buckling behavior of thin rectangular plate of asymmetric structure with shear taking rigid support along all sides into account is obtained. Shown solution can be used for post-buckling behavior estimation of surface defect similar to delamination for composite panels.
Bayesian recognition of a moving object information-measuring system state: a priori information weight correction
Authors: Muzhichek S M , Sebryakov G G , Pavlov V I , Tolstych S V , Kenzhekhanova M B 
Published: January 2021

Abstract
Within the framework of the Bayesian approach, a method has been developed for recognizing signal-interference situations that arise during the operation of the information-measuring system of a moving object. The corresponding algorithms are presented. A method for correcting the weight of a priori information in the case of its significant difference from a posteriori information is proposed. One of the possible correction options using the so-called indicators of signals and interference accompanying signs is presented.