Urban Transportation & Construction (E-Journal)
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151 research outputs found
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On-site inspection of building structure, preparation of inspection scheme and preparation of report
No full textOn-site inspection of building structure, preparation of inspection scheme and report are key technical links to ensure building
safety and reliability. Focusing on the whole process of building structure inspection, this paper systematically expounds the core contents
and methods of on-site inspection, including structural appearance inspection, material performance test, structural deformation and damage
detection, etc. The principle, framework and key points of the inspection scheme are analyzed in detail, and it is emphasized that the scheme
should be formulated in combination with the building type, inspection purpose and site conditions. At last, the specification of the test report
is summarized, including the general situation of the project, test data and analysis, structural safety evaluation and treatment suggestions.
Through sorting out the technical points of each link, it provides systematic guidance for building structure inspection, aiming at improving
the accuracy of inspection results and the scientificity of reports, and providing reliable basis for building safety management and maintenance decisions
Project Management Mode and Efficiency Analysis of Intelligent Road and Bridge Maintenance System Based on BIM+GIS
No full textIn response to limitations in traditional road and bridge maintenance project management—such as information silos, delayed
decision-making, and disconnection across the lifecycle—a smart maintenance system based on Building Information Modeling (BIM) and
Geographic Information Systems (GIS) has become a key approach to enhancing management efficiency. This model integrates BIM’s component-level data integration capabilities with GIS’s spatial analysis strengths, establishing a unified platform that combines data integration,
visualization, intelligent task assignment, and dynamic monitoring. Within this framework, the system enables intelligent generation of maintenance tasks and collaborative operations, while using sensor networks and closed-loop feedback mechanisms to conduct real-time evaluation and optimization of maintenance outcomes. Its performance manifests across multiple dimensions: multi-source data analytics drive
scientific decision-making and refined management; intelligent scheduling algorithms optimize resource allocation and enable whole-life-cycle cost control; real-time monitoring and automated dispatching significantly improve emergency response speed and public service quality.
This intelligent management model offers a systematic solution for digital transformation in road and bridge maintenance, holding significant
practical value for ensuring infrastructure safety and durability
Analysis of the present situation and deep-seated contradictions of railway development in China
No full textThe current situation of China’s railway development shows that passenger transport and freight transport are its main sources
of income, and the passenger transport income has exceeded the freight income in recent years. In terms of industry structure, the national
railway, joint venture railway and local railway constitute China’s railway network, and the State Railway Group and its subsidiaries control
the dispatching operation. Railway planning and development has experienced the expansion from “four vertical and four horizontal” to
“eight vertical and eight horizontal”, and the construction of high-speed railways has been rapid. However, deep-seated contradictions have
gradually emerged, including stagnant growth in freight and mail turnover, declining freight profitability, and structural problems caused by
differences in passenger base and freight distance between high-speed rail and universal speed rail. In addition, China Railway Group’s debt
continues to rise and its profitability is weak
New Energy Vehicle Power System Fault Detection and Vehicle Engineering Support
No full textNew energy vehicle power system fault detection and vehicle engineering guarantee is an important topic in the current automobile
industry. With the popularity of new energy vehicles, its safety and reliability problems have become increasingly prominent. This paper
summarizes the key points of fault detection of the power system of new energy vehicles, including battery management system, thermal
management system and fault diagnosis technology, etc., and discusses the necessary measures to ensure the engineering protection of new
energy vehicles, such as improving the safety management mechanism, ensuring product quality and safety, and improving the efficiency of
the monitoring platform. By analyzing the existing technologies and methods, the improvement direction is proposed to improve the safety
and operation efficiency of new energy vehicles
Study on the Socio-Economic Driving Mechanism of Freshippo Store Spatial Layout from the Perspective of Central Place Theory Reconstruction
No full textBased on the perspective of central place theory reconstruction, this paper focuses on the empirical study of the socio-economic
driving logic behind the spatial layout of Freshippo stores. Against the backdrop of new retail formats reconstructing consumption scenarios,
the applicable boundaries of the traditional central place theory are facing challenges. By defining the core research area, integrating enterprise operation data, urban statistical data, and geospatial data, and applying methods such as kernel density estimation and spatial econometric models, this paper systematically analyzes the spatial distribution characteristics of Freshippo stores, interprets their adaptability to the
reconstructed central place theory, and examines the driving effects of socio-economic factors. The study finds that Freshippo stores present
an unbalanced distribution pattern of “core agglomeration - edge diffusion”. Their layout logic breaks through the hierarchical nesting model
of traditional central places and shifts to a “node network integrating online and offline” form. Digital consumption penetration rate, community commercial maturity, transportation accessibility, and human capital level constitute the core driving factors, and the impact intensity of
different factors shows regional heterogeneity. This study provides theoretical support and practical reference for optimizing the spatial layout
of new retail enterprises
Effects of Variable-Frequency Vibration Stress on Chilling Injury and Storage Quality of Blueberries
No full textIn this study, blueberries were subjected to vibration treatments of 3 Hz (3 h), 3-4-3 Hz (3×1 h), and 4-3-4 Hz (3×1 h), then stored
at 4±0.5°C and 90%-95% humidity for 20 days. Physiological indices were measured every 3 days. The results showed that blueberries in the
3 Hz fixed-frequency vibration group maintained better quality, with chilling injury occurring on the 12th day. In contrast, blueberries in the
3-4-3 Hz and 4-3-4 Hz variable-frequency vibration groups suffered more severe damage, with chilling injury appearing on the 8th day, characterized by increased color difference (ΔE) and cell membrane permeability, elevated activities of superoxide dismutase (SOD) and catalase
(CAT), and decreased contents of anthocyanins and ascorbic acid (AsA), as well as reduced activity of peroxidase (POD). The study indicates
that variable-frequency vibration is more likely to damage blueberries than fixed-frequency vibration, providing a basis for reducing quality
loss of blueberries during transportation and storage
Research on control allocation, legality and acquisition performance of cross-border M&A based on stakeholder theory
No full textAs the involvement of Chinese enterprises in cross-border mergers and acquisitions (M&A) increases, on the one hand, it can drive enterprises to integrate with the international community and accelerate their transformation and upgrading, continuously enhancing their international competitiveness; on the other hand, it will also cause enterprises to experience more setbacks and challenges, especially the “weak acquisition of the strong” reverse cross-border acquisitions, which makes enterprises face a higher risk of failure. Reasonable control rights allocation can fully utilize the competitive advantages of enterprises, achieve synergistic cooperation among shareholders, board of directors, and management, promote the realization of enterprises’ cross-border acquisition goals, and thus enhance the value creation of acquisitions. There is a positive correlation between internal legitimacy and acquisition performance; the relevant assumptions about the distribution of shareholder control rights are invalid; the control rights at the board of directors level are negatively correlated with internal legitimacy and acquisition performance, and internal legitimacy has a mediating effect between the control rights at the board of directors level and acquisition performance, but the moderating effect of the acquisition mode is not significant; the control rights at the management level are negatively correlated with internal legitimacy and acquisition performance, and internal legitimacy has a mediating effect between the control rights at the management level and acquisition performance, and the acquisition mode negatively moderates the relationship between the control rights at the management level and internal legitimacy. This study takes the post-acquisition control rights allocation as the entry point, and examines the cross-border acquisition activities of Chinese enterprises from the perspective of stakeholders. The research results not only can enrich existing acquisition theory, but also can provide theoretical guidance for Chinese enterprise managers on allocation of control of target enterprises, and provide a theoretical basis for the state to formulate and optimize the system and policies of enterprises’ cross-border acquisitions
The Practical Logic of Public Space Creation in Old Industrial Areas in Urban Renewal ——Yangpu Riverside Area, Shanghai, as an Example
No full textBased on the good results of urban renewal in Yangpu Riverside Area, it is found that the creation of public space in the old industrial area follows five major logics, namely, the action logic of collaborative governance by the main stakeholders, the conceptual logic of
inheriting and innovating the local cultural lineage, the architectural logic of symbiosis and integration of multi-dimensional elements, the
value logic of asset restructuring for industrial transformation, and the landscape logic of adaptive asset reuse, which shapes a spatial structure pattern of coexistence between nature and architecture, and between the city and its people
An analytical study on the influencing factors of building energy consumption based on the VAR model
No full textIn order to promote urban energy conservation and emission reduction, expand the scale of green building development, and explore the key influencing factors of building energy consumption, this paper establishes a vector autoregressive (VAR) model based on annual
time-series data from 2004-2021 through Eviews 11.0 software, and applies the unit root test, impulse response function, and variance decomposition to carry out empirical analyses to quantitatively study the development status of building energy consumption. The study found
that the total number of people and the income of the residents are not the same. The study found that the increase of total population and the
level of residents‘ income both promote the growth of building energy consumption, and the degree of influence of total population accounts
for 34%, and the level of residents’ income accounts for 27%
Research on Site Selection Technology of Electric Vehicle Charging Stations in Large Cities Considering User Behavior Patterns
No full textThis paper conducts an in-depth study on the site selection technology of electric vehicle charging stations in large cities considering user behavior patterns from a professional and technical perspective. Firstly, it expounds the significance of user behavior patterns in
site selection, including their impact on station operation efficiency, spatial coverage accuracy, resource allocation balance, and sustainability.
Then, it analyzes the existing problems in current site selection, such as the mismatch between station distribution and users’ daily activity
areas, failure to match users’ charging time rules, neglect of users’ driving route characteristics, and failure to respond to differences in users’
charging demand intensity, as well as the consequences. Finally, it proposes specific site selection technologies such as user activity hotspot
analysis, charging time prediction model, path trajectory mining, and demand grading response. The research shows that the site selection
technology combined with user behavior patterns can improve the rationality and utilization efficiency of charging station layout, providing
technical support for the sustainable development of urban transportation