bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on Salt Spray Delayed Cracking Performance of Ultra-high Strength Martensitic Steel
Authors: Rongchun Wan , Yimeng Fang , Liming Fu , Baoshan Cao , Qingyan Ma , Xun Gong 
Published: May 2021

Abstract
The delayed cracking performance of three kinds of automotive ultra-high strength martensite steels, MS980, MS1180 and MS1300, was studied by the salt spray delayed cracking test of deep drawing and punching cup, and the relationship between delayed cracking performance and microstructure was analyzed. The results show that the best of anti-delayed fracture resistance is MS980 steel. The worst of anti-delayed fracture resistance is MS1300 steel. In addition, the results also show that there is a critical forming ratio of three MS steels (MS980 steel is 1.7, MS1180 steel is between 1.5 and 1.6, and MS1300 steel is between 1.3 and 1.4). Below the critical forming ratio, there is no delay cracking in deep drawing specimen. And the critical forming ratio can be used as a basis for evaluating the delay fracture of ultra high-strength steel under some condition.
Construction Method of Seepage Control and Leakage Stoppage in Water Conservancy Project Construction
Authors: XuDong Ni , Hou Xiaoyue 
Published: May 2021

Abstract
In order to promote the development of water conservancy and improve the quality of water conservancy project, this paper expounds the causes of leakage in water conservancy project construction through theoretical analysis, and expounds two basic construction methods of seepage prevention and plugging in water conservancy project, and puts forward guarantee measures for seepage prevention and plugging construction in water conservancy project, for reference of relevant personnel.
Research on Landscape Design of Country Parks in Cold Regions Based on Ecological Restoration
Authors: Wu Xukun 
Published: May 2021

Abstract
As a special form of urban green space, country parks can provide precious resources, leisure space and a good natural environment for the region. As the suburbs of cities are areas with fuzzy boundaries in the urban-rural integration zone, urban planning often only pays attention to the construction of the central area and neglects the maintenance of the urban edges, forcing the suburbs to suffer from agricultural pollution, domestic waste pollution and industrial pollution, and the ecological environment continues to deteriorate. As a result, the suburban ecological security system has become fragile, and the city has lost its green protection circle. There are many cold cities in China, and each cold city has different ecological problems due to human activities and different geographical conditions. This article is based on the existing theoretical research in cold cities, and comprehensively analyzes the ecological problems faced by cold cities. Based on the ecological restoration technology, this article explores the landscape design of the ecological restoration of country parks in cold regions, and provides references for restoring the ecological barriers of cold cities and promoting the sustainable development of the cold city ecosystem.
Influence of silt content on shear strength of sandy soil
Authors: Li Jinbu , Geng Hao , Zhang Guorong , Jin Guangri 
Published: May 2021

Abstract
Direct shear tests were carried out on silt standard sand specimens with four silt contents of 0%, 5%, 10%, 20% under three conditions of average maximum dry density, optimal moisture content and saturation, respectively. The effects of different contents and different states on internal friction angle and cohesion of sand specimens were studied. It is found that the internal friction angle and cohesion increase with the increase of silt content under the condition of average maximum dry density and optimal water content, and with the increase of silt content, the internal friction angle decreases and the cohesion increases in saturated state.
An Aseismic Design Model Based on Flexible Suspension and Lateral Elastic Support and Its Dynamics Analysis
Authors: Bai Jitao , Liu Chongyang , Yang Zewen 
Published: May 2021

Abstract
Suspension-type structures are of excellent seismic performance. It is expected to realize a better anti-seismic effect by integrating the elastic constraints that can absorb the seismic energy with the suspension-type structures. A structure consisting of vertical suspension and lateral elastic support was designed according to seismic damage characteristics for engineering structures, and some hypotheses were made to its stress conditions, which were properly simplified. Next, a basic mechanical model was established, followed by the structural dynamics analysis, so as to obtain the design value of elastic rigidity needed to ensure the minimum vibration amplitude. In the end, the seismic response characteristics and optimal aseismic design of the entire structure were acquired through an equivalent analogy. This study can be taken for reference in the new-type aseismic structural design based on the abovementioned model.
Research on settlement analysis of large caisson foundation by centrifuge model test
Authors: Guo Mingwei , Dong Xuechao , Wang Qiang 
Published: May 2021

Abstract
With the increasing scale of caisson foundation in the construction of long-span bridge engineering in China, the overall settlement of large caisson foundation is vital to the construction and safe operation of long-span bridge. Taking the large caisson foundation of Changtai Yangtze River Bridge as the engineering ground, the overall settlement of this caisson foundation was analyzed in detail at the construction stage of Changtai Yangtze River Bridge by centrifuge model test based on the distribution of actual stratum. The test results demonstrated that the overall settlement was about 225mm when the construction of Changtai Yangtze River Bridge is finished, the settlement curve can be divided into three stages with the construction process of Changtai Yangtze River Bridge, and they are slow growth, rapid deformation and deformation stability. The study provides important reference to the design of large caisson foundation of Changtai Yangtze River Bridge, and it also has significant referential meaning to the construction of similar caisson foundation.
The Strategy of Passive Ecological Building Design Based on Guangxi’s Climate Characteristics —A Case Study on the Garden Art Gallery of the 12th China (Nanning) International Garden Expo
Authors: Quan Jing , Songyue Xu , Chang Liu , Meng Jia , He Liu 
Published: May 2021

Abstract
This project is based on the climate characteristics of Guangxi, combined with regional traditional construction methods and vernacular construction materials, and mainly in the light of the passive green building technology system guided by the principle of less manpower and more natures features, which saves early investment and the cost of operation and maintenance, further verifies the effectiveness of the strategy after completion, providing a reference for the development and application of related passive building technology.
The decision making of scientific research direction of construction enterprise
Authors: Luo Ye , Peng Geng , Luo ZhiWen , Shi YunXing , Tian Zhen , Zhao YongXi , Luo YuXiang , Liang YanFang 
Published: May 2021

Abstract
The determination of research direction is a complicated process, especially in the case of architectural research projects. General research projects, especially engineering projects, usually have several characteristics: first, large amount of capital. Second, the work cycle is long. Third, the return is unknown. Therefore, it is particularly important to establish an evaluation system for engineering research projects. This paper analyzes the literature on the civil engineering. The original index factors were extracted and the final index was determined by expert group discussion. Analytic hierarchical analysis (AHP), computer calculation (MATLAB) and hand calculation are used to determine the weight factor. In this paper, real cases are introduced to help leaders of Z enterprise to make decisions on scientific research projects. Based on this case, it can provide reference for other civil engineering research projects
Development situation and analysis of green low carbon buildings in China
Authors: Jing Zhang 
Published: May 2021

Abstract
In order to study the evaluation system, design methods and management modes of low-carbon buildings were compared and analyzed in China and abroad. Based on that, the deficiencies in the evaluation system, design methods and management modes of low-carbon buildings were produced. The analytical results show that, a diversified system for all classes of town to city should be developed in the evaluation system; the building construction should be optimized and new energy sources, such as: wind, solar, geothermal, nuclear energy, natural gas and coal, should be explored to reduce carbon uses in the design techniques; the promotion of the concept of green low-carbon should be strengthened, economic incentive policies should be implemented, and exchanges of developed countries should be increased in the management model.
Study on the identification and control of operational safety accidents in construction
Authors: Zheng Feng 
Published: May 2021

Abstract
Since the 21st century, China’s urbanization process is accelerating, the construction industry has developed rapidly and become one of the pillar industries of the national economy, but the construction safety problems also follow. Although the progress of modern technology and management level can improve this problem to a certain extent, safety accidents still occur frequently in actual construction due to the complexity of construction process and the interference of many uncertain factors. Therefore, it is necessary to carry out research on the prevention and control system of construction safety accidents, which is of great significance to improve the prevention and control ability of construction safety accidents and reduce the accident rate. On the basis of a large number of literature studies, this paper establishes an evaluation model for the prevention and control of construction safety accidents, analyses four levels including the risk of equipment failure, environmental risk, the risk of personnel failure and management risk, verifies the model through AHP, and gives weight to each index to draw relevant conclusions. Combined with the current situation of construction safety accidents in construction companies in recent two years, this paper discusses and analyses the problems existing in the prevention and control of construction safety accidents in construction companies, and puts forward corresponding optimization countermeasures, in order to provide assistance for the decision-making of the prevention and control of construction safety accidents.
Architectural Localization Design Strategies for Small and Medium-Sized Terminals in Africa
Authors: JianNing  , Yang Yuxi , Ruan Yuanbo , Li Yan 
Published: May 2021

Abstract
With the ever-enhanced comprehensive national strength, China plays an increasingly important role on the international arena, and it has participated in more and more terminal projects on the African continent. By summarizing the three aspects of comparing basic parameters and technological parameters, this paper analyzes three practical projects of micromidi airport terminal buildings in Africa that were designed and constructed with Chinese participation. Finally, in the aspects of design standard, construction scale, service standard, technological process, the response of natural environment elements and the response of cultural elements, this paper compares and analyzes with the airport terminal in China. How to respond to the local cultures and realize the localization design was discussed when Chinese architecture marched into the world construction market.
Study of Roof Tiles in Lingnan Traditional Buildings and Roof Drainage Technologies
Authors: Yan Lina , Chen Yile 
Published: May 2021

Abstract
Lingnan building is a key part of Chinese classical architectural schools, and the preservation & repair technologies of Lingnan traditional building roofs, which can embody Lingnan characteristics most, are especially important. The roof tiles of Lingnan traditional buildings and roof drainage technologies were taken as the main study objects. Under the background of Lingnan environmental features, effective roof repair technologies were summarized by combining the roof tile forms and texture types, analyzing the relationship between roof tiling form and roof drainage, and supplementing the traditional tile fabrication technologies, etc., expecting to provide a pragmatic reference for the roof repair of Lingnan ancient buildings.
The Landscape Design of Qi Cai Yunnan No.1 Commercial District
Authors: Yin Zhang , Wenting Sun 
Published: May 2021

Abstract
With the increasing development of the urban commercial pedestrian street, the large flow of people has brought many troubles, such as the conflict between the floating crowd and the static crowd, the crowd crowding, noise and noise in the pedestrian street, these problems can be solved by the layout of the central square of the commercial street. Through the Landscape design of the Qi Cai Yunnan No. 1 Commercial District as an example, reasonable road planning and square node partition design are carried out in order to solve the problem of crowd congestion and provide a high-quality activity and communication space for people.
Research on crack detection of bridge deck based on computer vision
Authors: Cao Jiawei 
Published: May 2021

Abstract
Bridge deck crack is the most serious bridge deck disease. To reduce the time, cost, and money cost of bridge deck crack detection, computer vision technology is combined with bridge deck crack detection. First of all, the main ways of obtaining bridge surface images are analyzed. Then, the algorithms of image enhancement, image noise reduction, image segmentation, crack extraction and recognition, and crack feature extraction in bridge deck crack detection based on computer vision are summarized respectively. Finally, the existing detection methods are reviewed, and the problems encountered in the research process and future research directions are further discussed.
Research on GIS-Based Urban Road Network Congestion Recognition Model
Authors: Xiao Hai , Wang Yu , Zheng Yuan , Chen Lu 
Published: May 2021

Abstract
Traffic congestion has now become one of the most serious urban problems, but the existing research seldom explores the recognition model level of traffic congestion. Taking the central area of Zhonghe Street in Chengdu High-tech Zone as the research area, and mitigating traffic as the basic goal, from the perspective of road network, collect one-week road traffic data of Gaode and use field investigation and big data spatial sampling and other means with GIS spatial analysis methods. A “point”-“line”-“surface” congestion situation analysis model was established to explore the causes of traffic congestion within the study area. The results show that the main traffic congestion of Zhonghe Street is distributed along Tianfu Avenue in the west, along Zhonghe Avenue in the middle, and the old city area in the northeast. Congestion is unevenly distributed in time and space. It is recommended to carry out targeted optimization planning and transformation of the road network to alleviate traffic congestion and improve the efficiency of road network traffic.
Synthesis, physico-chemical characterization and field emission behaviour of 3D chrysanthemum like pristine ReS2, and ReS2-rGO nanocomposite
Authors: Mistari Chetan D , More Mahendra A 
Published: May 2021

Abstract
3D chrysanthemum like pristine ReS2 and nanocomposite of ReS2 with reduced graphene oxide (rGO) have been synthesized using facile one step hydrothermal method, followed by physico-chemical characterizations to reveal their phase, structural and electronic properties. Efforts have been made to reveal the influence of process parameters on morphology and growth of the as-synthesized products. From application point of view, field emission (FE) behavior of pristine ReS2 and ReS2-rGO nanocomposite emitters has been investigated at base pressure of 1 × 10–8 torr. The ReS2 and ReS2-rGO nanocomposite emitters showed values of turn-on field (corresponding to emission current density of 1μA cm−2) as 2.10 and 1.66 V μm−1, and field enhancement factor (β) as ∼965 and 1176, Furthermore, the ReS2-rGO nanocomposite emitter delivered maximum emission current density of ∼1472 μA cm−2 at applied field of 3.1 V μm−1. Both the emitters exhibited good emission current stability at pre-set value ∼5 μA over more than 3 h duration. The superior FE properties of the ReS2-rGO nanocomposite emitter are attributed to optimized morphology offering high field enhancement factor coupled with modulation of electronic properties reflected as lowering of the work function. The value of work function of ReS2-rGO nanocomposite, measured using a retarding field analyzer, is found to be 4.29, lower than that of the pristine sample (4.49 eV). The results signify that functionality of pristine nanostructures is greatly improved via formation of nanocomposites and desirable nanocomposites possessing unique morphology can be synthesized under optimized experimental conditions using a facile and inexpensive hydrothermal route.
Ionic gating in metallic superconductors: A brief review
Authors: Piatti Erik 
Published: May 2021

Abstract
Ionic gating is a very popular tool to investigate and control the electric charge transport and electronic ground state in a wide variety of different materials. This is due to its capability to induce large modulations of the surface charge density by means of the electric-double-layer field-effect transistor (EDL-FET) architecture, and has been proven to be capable of tuning even the properties of metallic systems. In this short review, I summarize the main results which have been achieved so far in controlling the superconducting (SC) properties of thin films of conventional metallic superconductors by means of the ionic gating technique. I discuss how the gate-induced charge doping, despite being confined to a thin surface layer by electrostatic screening, results in a long-range ‘bulk’ modulation of the SC properties by the coherent nature of the SC condensate, as evidenced by the observation of suppressions in the critical temperature of films much thicker than the electrostatic screening length, and by the pronounced thickness-dependence of their magnitude. I review how this behavior can be modelled in terms of proximity effect between the charge-doped surface layer and the unperturbed bulk with different degrees of approximation, and how first-principles calculations have been employed to determine the origin of an anomalous increase in the electrostatic screening length at ultrahigh electric fields, thus fully confirming the validity of the proximity effect model. Finally, I discuss a general framework—based on the combination of ab-initio Density Functional Theory and the Migdal-Eliashberg theory of superconductivity—by which the properties of any gated thin film of a conventional metallic superconductor can be determined purely from first principles.
Prevalence of nodal involvement in rectal cancer after chemoradiotherapy
Authors: Haak H E , Beets G L , Peeters K , Nelemans P J , Valentini V , Rödel C , Kuo L , Calvo F A , Garcia-Aguilar J , Glynne-Jones R , Pucciarelli S , Suarez J , Theodoropoulos G , Biondo S , Lambregts D M J , Beets-Tan R G H , Maas M 
Published: May 2021

Abstract

Background
The purpose of this study was to investigate the prevalence of ypN+ status according to ypT category in patients with locally advanced rectal cancer treated with chemoradiotherapy and total mesorectal excision, and to assess the impact of ypN+ on disease recurrence and survival by pooled analysis of individual-patient data.

Methods
Individual-patient data from 10 studies of chemoradiotherapy for rectal cancer were included. Pooled rates of ypN+ disease were calculated with 95 per cent confidence interval for each ypT category. Kaplan–Meier and Cox regression analyses were undertaken to assess influence of ypN status on 5-year disease-free survival (DFS) and overall survival (OS).

Results
Data on 1898 patients were included in the study. Median follow-up was 50 (range 0–219) months. The pooled rate of ypN+ disease was 7 per cent for ypT0, 12 per cent for ypT1, 17 per cent for ypT2, 40 per cent for ypT3, and 46 per cent for ypT4 tumours. Patients with ypN+ disease had lower 5-year DFS and OS (46.2 and 63.4 per cent respectively) than patients with ypN0 tumours (74.5 and 83.2 per cent) (P &lt; 0.001). Cox regression analyses showed ypN+ status to be an independent predictor of recurrence and death.

Conclusion
Risk of nodal metastases (ypN+) after chemoradiotherapy increases with advancing ypT category and needs to be considered if an organ-preserving strategy is contemplated.
Corpus callosum dysgenesis causes novel patterns of structural and functional brain connectivity
Authors: Szczupak Diego , Kossmann Ferraz Marina , Gemal Lucas , Oliveira-Szejnfeld Patricia S , Monteiro Myriam , Bramati Ivanei , Vargas Fernando R ,   IRC5 Consortium, Lent Roberto , Silva Afonso C , Tovar-Moll Fernanda 
Published: May 2021

Abstract
Developmental malformations (dysgenesis) of the corpus callosum lead to neurological conditions with a broad range of clinical presentations. Investigating the altered brain connectivity patterns is crucial to understanding both adaptive and maladaptive neuroplasticity in corpus callosum dysgenesis patients. Here, we acquired structural diffusion-weighted and resting-state functional MRI data from a cohort of 11 corpus callosum dysgenesis patients (five with agenesis and six with hypoplasia) and compared their structural and functional connectivity patterns to healthy subjects selected from the Human Connectome Project. We found that these patients have fewer structural inter- and intra-hemispheric brain connections relative to healthy controls. Interestingly, the patients with callosal agenesis have a scant number of inter-hemispheric connections but manage to maintain the full integrity of functional connectivity between the same cortical regions as the healthy subjects. On the other hand, the hypoplasic group presented abnormal structural and functional connectivity patterns relative to healthy controls while maintaining the same total amount of functional connections. These results demonstrate that acallosal patients can compensate for having fewer structural brain connections and present functional adaptation. However, hypoplasics present atypical structural connections to different brain regions, leading to entirely new and abnormal functional brain connectivity patterns.