bluuebunny/crossref_metadata_2025_split huggingface dataset:
Bp-ant colony algorithm: escape the Louvre
Authors: Tan Chuanming 
Published: June 2021

Abstract
With the spread of terrorism in the new era, France has suffered many terrorist attacks in recent years. The new situation calls for a review of emergency evacuation plans for popular destinations. Taking the Louvre Museum as the research object, this paper discusses the emergency evacuation plan in detail. At the same time, in order to make effective planning, this study selects the day with the largest number of visitors to the Louvre Museum as the sample. In the establishment of emergency evacuation model, ant colony algorithm is introduced. The training time of two kinds of traffic evacuation algorithm is given, and BP neural network is used for training. In addition, the dynamic Bottleneck Identification Method Based on fuzzy set theory is used in this study. Through model optimization, the possible bottleneck location is accurately determined. Finally, this paper analyzes the advantages and disadvantages of the model, and gives the specific evacuation routes.
Experimental study on secondary consolidation characteristics of Kunming peat soil
Authors: Li Xin-Ming , Fu Ying-Jie , Chen Cheng , Yin Song 
Published: June 2021

Abstract
A series of conventional consolidation tests and 60 d creep consolidation tests were carried out on undisturbed peat soil samples taken from Kunming for the consolidation and secondary consolidation characteristics. The variation rule and formation mechanism of secondary consolidation parameters were analyzed in detail. Test results show that the e - lgt curves of Kunming peat soil under different consolidation pressures show an inverse S-shape, the ratio of secondary consolidation deformation to total deformation is 32.8%. With the increase of consolidation pressure p, the C
α value of peat soil and general soft clay first increase rapidly to the peak value and then decrease gradually. However, different from general soft clay, the peak value of C
α value of peat soil is higher which appears at the consolidation pressure of 200kPa (preconsolidation pressure of 67kPa). It is believed that this is related to the high content of organic matter and the abundant micropores in the organic matter. The C
α
/C
c value of Kunming peat soil is 0.052, which conforms to the “C
α
/C
c compression rule”. According to the soil classification standard based on the coefficient of secondary compressibility, Kunming peat soil belongs to high secondary compressibility soil.
Non-equilibrium Thermal Insulation Analysis of Self-insulation Wall
Authors: Wang Xuejin , Zhang Yujing , Hong Jing 
Published: June 2021

Abstract
In this paper, a mathematical model for calculating the cooling load of self insulation wall in unsteady heat transfer process is established. According to the reaction coefficient method based on Laplace transform and inverse transform, a software for calculating and analyzing the cooling load of self insulation wall is developed. The software can not only analyze the dependence of thermal parameters including thermal conductivity on the cooling load of external wall, but also analyze and calculate the self insulation wall. The non-equilibrium thermal insulation thickness of thermal insulation wall in different directions will provide practical calculation basis and data support for dynamic thermal insulation design of self insulation wall in energy-saving buildings.
Experimental Study about the Influence of Silane Impregnation on the Durability of Airport Pavement Concrete in Aircraft Deicing Fluid Environment
Authors: Yang Guo Qiang , Sun Zhong Jin 
Published: June 2021

Abstract
In order to study the influence of silane impregnation on the durability of airport pavement concrete in aircraft deicing fluid environment, corrosion resistance test, dynamic elastic modulus test, frost resistance test, and mechanical test (tensile strength) are adopted. The results show that (1) After 50 corrosion cycles, the surface of concrete without silane impregnation appears slight spalling, but the silane impregnation concrete does not, which indicates that silane impregnation effectively improves the corrosion resistance of concrete. (2) After the corrosion cycle and freeze-thaw cycle, the dynamic elastic modulus of the silane-impregnated concrete is nearly 1 / 4 higher than that of the untreated concrete, and the flexural strength is 19.88 % higher, proving that silane impregnation has a good enhancement effect on the durability of concrete.
Optimal Analysis of Domestic Air-Conditioning Heat Exchanger
Authors: Su Shunyu , Lu Shan 
Published: June 2021

Abstract
The energy efficiency improvement of air conditioning systems is very important. The relevant equations of air-conditioning heat exchanger are established based on the basic thermophysical laws in this paper. While R22 is the working fluid, the heat transfer equations of condenser and evaporator in gas and liquid two-phase region were solved with two different diameters ϕ 9.52mm and ϕ 7mm. The influence of diameter on fluid and heat transfer performance of air-conditioning heat transfer is analyzed based on calculated results. It shows that decreasing the diameter of the heat exchanger tube will be beneficial for the optimal design of heat exchanger if the increasing degree of the average heat transfer coefficient is higher than that of the total pressure drop. The conclusions of this study could provide theoretical basis to optimize the design of domestic air-conditioning heat transfer.
Preliminary Study on Problem Identification, Cause Analysis and Countermeasures of Data Application in Engineering Testing Industry
Authors: Qian Kun , Yao Jie 
Published: June 2021

Abstract
As a key node of engineering quality assurance, the engineering testing industry is obviously lagging behind other industries in its data application aspect, and there are various problems in policy, technology, and resources. Such problems have obviously affected the development trend of the entire industry, and it is urgent to solve the data problems in the engineering testing industry. By combing and analysing the status quo of data application in the industry, the article found three common problems of data application, no data available, inability to apply and no system management. These common problems directly affect the data application level of the entire industry. Based on the identified problems, this article further analyze the causes of the problems and point out the general direction of the industry data governance strategies.
Research on advantages and disadvantages of prestressed concrete hollow square pile and pipe pile in pile foundation selection
Authors: Wang Ruoyu , Li Yudian , Liu Xinyu , Zhang Shuang , Zhang Chenchen , Li Zeyi , Wang Peipei 
Published: June 2021

Abstract
In the process of industrial plant construction, pile foundation selection has a direct impact on the structural design. It is the goal of construction, design, investigation, supervision and construction units to find a pile type that can meet the economic rationality and quality requirements, and is conducive to construction and reduce the impact on the surrounding environment and buildings. In this paper, combined with the pile foundation selection design of the industrial plant, through the field investigation, pile bearing capacity detection and investigation report analysis, the cost comparative analysis is completed, and the advantages and disadvantages of hollow square pile and pipe pile in design and construction are compared.
Three-dimensional numerical simulation of flow in continuous bend under the influence of piers
Authors: Huang Sai Hua , Chai Wen Wei , He Jun 
Published: June 2021

Abstract
With the development of social economy, more and more cities plan to build various kinds of Bridges in curved rivers to construct urban traffic network. The Realizable k-ε turbulence model and VOF method were used to capture the free water surface, Simple algorithm was used for coupling calculation to simulate the flow characteristics of continuous bend with piers placed at 45° forward bend section. Simulation results show that: (1) under the condition of continuous curve, set in the horizontal surface slope will change the channel distribution of piers, bridge piers and curve superposition, the piers downstream transverse surface slope significantly improved, but the bridge pier near area, on the other hand, because of the water resistance of piers, bridge pier influence and affect the part of the balance of the bend, transverse surface slope value is only under the condition of no pier 1/2;(2) The high longitudinal flow velocity area is more concentrated, the high velocity center moves down to the bottom of the channel, and the central position of the circulation structure moves to the convex bank, which can aggravate the scouring of the convex bank.
Zn/S-modified Cu2O nanoparticles for applications in photocatalysis
Authors: Yuan S J , An Y , Yu C L , Zhao J , Wang T 
Published: June 2021

Abstract
A Zn/S Co-doped Cu2O composite photocatalyst with excellent performance is reported. Zn-Cu2O/S composite was prepared by simple hydrothermal synthesis and impregnation method. XRD, SEM and EDS analysis showed that Cu9S5 and ZnO were formed after Zn/S Co-doping, and p-n heterojunction was formed. Zn-Cu2O/S has good visible light sensing performance, rapid carrier transport, higher photocurrent density and 100% removal rate of methyl orange. The new ternary composite Zn-Cu2O/S has potential application value in the treatment of toxic dye wastewater.
Approach to damping effects of fairings on VIV of flexible cylinder with three-dimensional numerical simulations
Authors: Fu Jianhong , Wang Li , Xu Chengkan 
Published: June 2021

Abstract
Vortex-induced vibration (VIV), which will lead to the fatigue damage on coastal structures like flexible cylinders, has attracted considerable attention. The object of this study is to investigate the VIV phenomenon of flexible cylinder and the damping effects of fairings which could be used as vortex-suppressing devices, with three-dimensional (3D) fluid-structure interaction considered. In this paper, a 3D finite element (FE) model is established with the cylinder simulated by solid elements, the fluid field by the Arbitrary Lagrangian Eulerian (ALE) scheme, and the pipe surface by the moving boundary. Non-uniform mesh in different region and dynamic mesh in the area around the pipe are used to better simulate the pipe and the fluid field. The feasibility of the model is verified. The correlations between the vibration amplitude and the vortex shedding frequency are depicted, with the lock-in phenomenon captured. The displacement responses of the pipe are calculated with the damping effects considered, which is reflected not only in reducing the vibration amplitude of the pipe, but also in raising the flow rates for the lock-in region. This study will provide useful theoretical reference for vibration control of the VIV phenomenon of flexible cylinder.
Experimental study on bending resistance of steel-UHPC composite slabs
Authors: Liu Xin-Yi 
Published: June 2021

Abstract
The local cracking problem of steel-UHPC composite slab structure layer under negative bending moment is a basic research topic for the application and development of this new type composite bridge deck structure system. Combined with the performance of UHPC, the mechanical behaviour of composite slab before ultimate load was analysed by designing a pure bending test model, and the mechanical indexes such as cracking load and ultimate load were obtained. The results show that the reinforcement and the combination effect can effectively limit the development of tensile crack in UHPC layer and improve the bearing capacity of the slab. The reinforced steel-UHPC composite slab ears good ductility. The material properties of UHPC should not be ignored in the analysis and calculation of mechanical properties of composite slabs. The combined effect can limit the development of tensile cracking and change its failure mode of the UHPC layer. The thickness of longitudinal reinforcement protective layer of steel-UHPC composite slab can significantly affect its flexural behavior. The application range of the equivalent section method based on linear elasticity is limited, and it is necessary to develop the analysis and calculation method that can accurately reflect the cooperative working effect of each member of the steel-UHPC composite plate.
Simulation on the impacts of tree canopy morphology on thermal comfort at the pedestrian level
Authors: Ding Wei , Lu Xiaoyi , Dang Caidi , Zhu Zongzhou , Zou Weihan 
Published: June 2021

Abstract
To explore the role of tree canopy morphology on the urban thermal environment and human comfort, this paper considers the variation of four factors (Top Canopy Height (TCH), Leaf Area Density (LAD), Bottom Canopy Height (BCH) and Canopy Diameter (CD)) and uses an orthogonal experiment method (OEM) to build 25 simulation scenarios. In an idealized model planted with trees, the effects of changes in canopy morphological parameters on air temperature and Physical Equivalent Temperature (PET) at a pedestrian height of 1.5m are simulated and discussed using ENVI-met software. The results show that the air temperatures for 25 different groups differed significantly during the day and less at night. At the hottest time of the day (15:00), there was a difference of 7.8°C between the coolest (ID 11) and hottest (ID 16) groups. TCH, LAD and CD are all negatively correlated with PET, while the BCH is positively correlated with PET. Among the four canopy morphology parameters, CD has the most significant effect on PET at a pedestrian level of 1.5m.
Particle breakage and micromechanical characteristics of calcareous sand during shearing
Authors: Gao Y. , Li W. L. , Shi T. G. 
Published: June 2021

Abstract
Based on the discrete element method, the numerical simulation of the shear test for calcareous sand was carried out to explore the particle breakage and micromechanical mechanism of calcareous sand in the shear process. The results show that the particle breakage can reduce the peak strength of calcareous sand, and make the bulk deformation change from dilatancy to shrinkage. The particle breakage is concentrated in the shear band; with the increase of axial strain, the degree of particle breakage increases, which is also positively correlated with confining pressure and axial strain. The contact forces are redistributed when the particles are broken; the dominant direction of the contact forces in the strong force chain is consistent with σ1, always in the vertical direction, while the dominant direction of the contact forces in the weak force chain is consistent with σ3, in the horizontal direction, and it gradually deflects to the vertical direction with increasing axial strain; the anisotropy of the contact normal also decreases significantly after particle breakage. The magnitudes of the contact forces in the strong and weak force chains conform to the Weibull distribution. After particle crushing, the magnitudes of the contact forces decrease significantly, and the numbers of the contact forces increase significantly, and the percentage of the weak forces increases significantly, which leads to the decrease of the strength of the sample.
Progress in treatment technology of phenol-containing industrial wastewater
Authors: Yuting Fu , Changbo Li , Guozheng Zhao , Hui Liang , Shuo Wang , Hongzhu Xu 
Published: June 2021

Abstract
This article describes the nature and hazards of phenol-containing industrial wastewater, and summarizes the characteristics of various treatment technologies for phenol-containing wastewater. The methods for treating phenol-containing industrial wastewater include chemical precipitation method, supercritical water oxidation method, Fenton method, ozone oxidation method and extraction method. This article reviews the research status and development trend of phenol-containing industrial wastewater treatment technology.
Technical specification for green design evaluation of cooking appliances
Authors: Zong Jianfang , Zhang Xin , Liang Xiuying , Tian Jianwei , Yuan Han , Guan Jinxin 
Published: June 2021

Abstract
This paper sets out the principle of green design of cooking appliances, and analyzes the general provisions on green design of cooking appliances, the green design process and key points, evaluation requirements, preparation methods for a life-cycle evaluation report, and evaluation methods. The Technical Specification for Green Design Evaluation of Cooking Appliances plays a practical supporting role in systematically supporting the establishment of China’s eco-design evaluation mechanism. The research on and formulation of standards will help improve and promote the green design capabilities of enterprises, improve comprehensive management and cleaner production, and thereby cultivate a batch of green design demonstration enterprises with green development awareness and brand influence. Meanwhile, it has positive guiding significance to guiding green production and promoting green consumption.
Research on suitability evaluation standard of green road of “Four-New Technology” Based on AHP
Authors: Han Lijuan , Li Xuning , Jiang Shenggao , Liang Junwei 
Published: June 2021

Abstract
The Ministry of transport and provincial transportation departments recommend outstanding transportation scientific and technological achievements every year, and carried out a large number of highway construction demonstration projects. However, the selection of “four new technologies” has become a difficult problem for managers and builders. This paper analyzes the current situation of suitability evaluation and “Four-New Technology” in Zhejiang Province. After a large number of research on green road policy, demonstration project, standard and technological promotion results, the suitability evaluation standard of “four new technologies” of green road is established.
Landscape aging in ethnic minority regions based on entropy method-fuzzy comprehensive evaluation ——Take Yanji City, China as an example
Authors: Zhao Wenlu , Jin Guanghu 
Published: June 2021

Abstract
Global aging is becoming more and more serious. How to improve the landscape environment to provide the elderly with a more comfortable, convenient and pleasant living environment, we need to create an suitable environment for the aging society based on the physical, psychological and social characteristics of the elderly. Taking China’s ethnic minority areas as an example, this paper selects 21 evaluation indicators for the landscape aging for ethnic minority areas from the perspective of security, accessibility, communicative, comfortable natureand richness. Through the use of entropy method, the fuzzy comprehensive evaluation of the application status of the elderly in the landscape of Yanji City is carried out, which aims to provide a reference for the improvement and development of the landscape aging in minority areas. The research results show that the index with the highest weight in the comprehensive evaluation of landscape aging of Yanji City in China’s ethnic minority areas are the degree of spatial identificationof 0.118 and the regional cultural embodimentof 0.086. The overall score of the evaluation system is 0.6017. All departments should set up special senior landscape work agencies or joint organizations to strengthen the attention to the landscape of ethnic minority elderly, increase their sense of belonging to the landscape, improve the greening environment and enhance the ageing of plant landscape design. Landscape architects should actively consider for the elderly, and strive to design a more comfortable landscape environment for the elderly.
Technical specification for green design evaluation of commercial refrigerating appliances
Authors: Zong Jianfang , Cheng Jianhong , Zhang Xin , Tian Jianwei , Yuan Han , Guan Jinxin 
Published: June 2021

Abstract
This paper sets out the principle of green design of commercial refrigerating appliances, and analyzes the general provisions on green design of commercial refrigerating appliances, the green design process and key points, evaluation requirements, preparation methods for a life-cycle evaluation report, and evaluation methods. The Technical Specification for Green Design Evaluation of Commercial Refrigerating Appliances plays a practical supporting role in systematically supporting the establishment of China’s eco-design evaluation mechanism. The research on and formulation of standards will help improve and promote the green design capabilities of enterprises, improve comprehensive management and cleaner production, and thereby cultivate a batch of green design demonstration enterprises with green development awareness and brand influence. Meanwhile, it has positive guiding significance to guiding green production and promoting green consumption.
Stratigraphic characteristics and geological significance of Qingshankou Formation in Songliao Basin
Authors: Ming Yang 
Published: June 2021

Abstract
The Qingshan Formation is the first large-scale lake invasion in the geologic evolution history of the Songliao Basin, the central depression area of the basin is widely distributed with black mudstone and shale, and the coarse clastic rocks in the western slope area and the northern dumping area are obviously increased, while the large sets of green-gray and purplish-red mudstone appear in the eastern uplift area and the southeast uplift area. By chronological analysis of the zircon minerals in the lacustrine sedimentary layers of the lake facies of the Qingshan formation, the U-Pb isotope harmonic ages were 91.35Ma, 91.06±0.69 Ma, it is confirmed that the bottom of Qingshankou Formation is proven to belong to the lower part of Turonian period; the 40Ar/39Ar isotope plateau age and the age of equal time line obtained from two or three section of Qingshankou Formation in Jin 6 well are 88.0±0.3 Ma, confirming that the top boundary of Qingshankou Formation has been extended to Coniacian period. At the same time, the appearance of Borealipollis, Plicapollis and Complexiopollis, which has important geologic age significance, indicates that the bottom boundary of Qingshankou has already entered to the late.
Research on Deformation Characteristics of Overlying Rock Strata in Floor Roadway
Authors: Wang ZHonghua 
Published: June 2021

Abstract
In order to study the deformation characteristics of the overlying rock layer of the floor roadway, the DW-6 multi-point displacement meter is used to measure the displacement of the surrounding rock of the roadway at different depths, and it is concluded that the displacement and deformation of the surrounding rock within 15m of the upper and lower sides of the pressure relief floor rock roadway. The upper part shows the largest deformation of the surrounding rock directly above, followed by the upper and lower sides 7.5m, and the upper and lower sides the smallest 15m. The different base points of the same borehole show the characteristics of alternating wave crests and troughs from the outside to the inside. The wave crests with larger displacements are the damaged areas of surrounding rock, and the troughs with smaller displacements are the non-damaged areas of surrounding rock.