scholarly journals Does the Development of a High-Speed Railway Improve the Equalization of Medical and Health Services? Evidence from China

2019 ◽  
Vol 16 (9) ◽  
pp. 1609 ◽  
Author(s):  
Gangqiang Yang ◽  
Yuxi Ma ◽  
Yongyu Xue ◽  
Xia Meng
Keyword(s):  
Health Services ◽  
High Speed ◽  
Health Resources ◽  
Delivery Mode ◽  
High Speed Railway ◽  
Medical Resources ◽  
The Public ◽  
Services Delivery ◽  
The Difference

Does the development of a high-speed railway (HSR) have a significant impact on the equalization of medical and health resources allocated among cities? Based on the panel data of 67 cities in China from 2007 to 2016, this paper investigates the direct and dynamic effects of HSR development on the equalization of medical and health services by using the difference-in-differences (DID) method. The empirical results show that an HSR connection significantly reduces the equalization level of medical and health services in cities and that the effect is larger for the period from the year of the connection to the second year. However, in the long term, HSR development improves the equalization level of medical and health services in cities. Heterogeneity tests show that the effect of the HSR connection shows an “N”-shaped trend under different city scales, the equalization level of medical resources in the largest cities benefit the most from HSR development, and the Eastern and Western regions of China are more sensitive to the HSR connection. While the allocation of medical resources is in the direction of equalization, the level of medical resources is significantly more equal with the HSR development in cities with stronger financial capacity and non-core cities. The analysis of other city characteristics provides policy recommendations for improving the public services delivery mode in China’s heterogeneous cities in terms of HSR development.

Comparative Analysis of Various Kinds Concrete Creep Prediction Models

2011 ◽  
Author(s):  
Jun-Qing Lei ◽  
Hang Xu ◽  
Li-Qun Zou
Keyword(s):  
Experimental Data ◽  
High Speed ◽  
Prediction Models ◽  
Concrete Creep ◽  
High Speed Railway ◽  
Railway Line ◽  
The Difference ◽  
Short Time ◽  
Very High

The ratio of bridges to High-speed Railway line in China is very high. The influence of concrete creep to bridge structure is very high, so it is necessary to study creep of concrete in depth. In this thesis, experimental data of four important regions in China are collected, and the curves of concrete creep are analyzed. While, by comparing the domestic and foreign curves of Concrete Creep Prediction Models, the difference between them could be found. In addition, the theory of long-term deformation of concrete obtained by short-time experiment, which is proposed by Professor Bazant is used. According to experimental data, the creep curves are fittd by regression method. Finally, the comparison between common prediction models and Bazants’ theory is carried out, it can be found that the regression value is closed to the measured value.

scholarly journals Research on the Profit Model of “Internet+ Logistics Park”

2021 ◽  
Vol 261 ◽  
pp. 03010
Author(s):  
Xiangru Meng ◽  
Jianmeng Sun ◽  
Haining Wang
Keyword(s):  
Operation Mode ◽  
Economic Benefits ◽  
Delivery Mode ◽  
Core Competitiveness ◽  
Profit Model ◽  
Logistics Park ◽  
The Public ◽  
Integration Mode ◽  
Stable Core

The operation and management mode of “Internet+ Logistics Park” ecosphere has long-term and stable core competitiveness. This paper studies how to obtain the corresponding economic benefits from the perspective of the operators of the logistics park. The logistics park chooses the appropriate logistics service and the public service function to obtain the corresponding economic benefit. The development of the logistics park will finally be implemented to the profit of the park. The paper puts forward the profit model of “Internet+ Logistics Park” ecosphere; This paper mainly analyzes five modes: logistics integration mode, platform operation mode, resource integration mode, service delivery mode and chain replication mode; This paper makes a comparative analysis of different profit models from the aspects of model characteristics and profit thinking.

Research on Railway Bridge Evaluation Index

2013 ◽  
Vol 838-841 ◽  
pp. 1126-1129
Author(s):  
Zhao Lan Wei ◽  
Guo Jun Liu ◽  
Zu Yin Zou
Keyword(s):  
High Speed ◽  
Evaluation Index ◽  
Railway Bridge ◽  
High Speed Railway ◽  
Railway Bridges ◽  
Bridge Evaluation ◽  
Normal Speed ◽  
The Difference

Each related index was compared in three specifications, including Fundamental code for design on railway bridge and culvert, Code for rating existing railway bridges, and Code for design of high speed railway. The reasons of the difference existed in indexes was revealed, especially between high speed railway bridge and normal speed railway bridge.

How to balance interfirm relationships? A case from high-speed railway industry

2020 ◽  
Vol 35 (11) ◽  
pp. 1785-1799 ◽  
Author(s):  
Na Zhang ◽  
Xiaopeng Deng ◽  
Bon-Gang Hwang ◽  
Yanliang Niu
Keyword(s):  
High Speed ◽  
Superior Performance ◽  
Interfirm Relationships ◽  
High Speed Railway ◽  
Content Type ◽  
Railway Industry ◽  
Interfirm Cooperation ◽  
Relationship Structures ◽  
Interfirm Competition

Purpose Balancing interfirm relationships is important for firms’ long-term superior performance. However, prior studies mainly focus on interfirm competition or interfirm cooperation separately, ignoring the balance of interfirm relationships. To bridge this gap in knowledge, this study aims to develop a framework to evaluate the balance of interfirm competition and interfirm cooperation and propose strategies to optimize a firm’s interfirm relationships. Design/methodology/approach After an in-depth literature review, a framework was developed for evaluating and optimizing the interfirm relationships. Taking the high-speed railway industry as an example, the proposed framework was implemented. Findings The results of the case confirm that the balancing of interfirm relationships can lead to more superior firm performance. Also, rather than mutual suppression, the interfirm competition and interfirm cooperation present a roughly positive relationship. Originality/value This study would contribute to the existing knowledge body by developing a framework for balancing interfirm relationships. Also, this study can aid practitioners in evaluating and optimizing their interfirm relationship structures.

scholarly journals Fatigue Life Characteristics of Segmental Lining Structure for the Shallow Buried Metro Tunnel under the Dynamic Load of a High-Speed Railway

2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Wangping Qian ◽  
Taiyue Qi ◽  
Qing Zhao ◽  
Bingrong Pu ◽  
Jin Zhang ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Fatigue Failure ◽  
Dynamic Load ◽  
High Speed ◽  
Dynamic Loads ◽  
High Speed Railway ◽  
Segmental Lining ◽  
Lining Structure ◽  
Metro Tunnel

Shallow buried shield metro tunnels constructed underneath subgrade project of high-speed railways are becoming increasingly common in China, but the lower metro tunnel bears the fatigue effect of dynamic load induced by the upper high-speed railway, so the long-term durability of segmental lining is a nonnegligible problem. The segmental lining structure of metro tunnel is in a state of static-dynamic loads for a long time, especially when a high-speed railway passes above the metro line, and the long-term durability of segmental lining needs further research. Based on theoretical analysis, the effect of different forms of loads on the fatigue life was analyzed, the change law of the static-dynamic loads on segmental lining was summarized, and the method was put forward to evaluate the fatigue life characteristics of segmental lining. The research results reveal that the additional dynamic load is the fundamental reason for the fatigue failure of the structure, and the existence of static load can cause and accelerate the occurrence of structural fatigue failure simultaneously. The results indicate that the fatigue life decreases gradually with the increase of static-dynamic load. Based on coupling analysis of static-dynamic loads of segmental lining, the fatigue life increases first and then decreases with the increase of buried depth of metro tunnel, and it remains unchanged when the depth exceeds a certain value. According to the actual metro tunnel engineering, by using ABAQUS software, a three-dimensional numerical simulation was carried out to analyze the characteristics of the fatigue life and evolution rules of segmental lining. Based on the modified fatigue life formula and metro service life, the optimization design of the buried depth was carried out to determine the most reasonable range of the buried depth. This study provides a valuable reference for safe operation and long-term durability of metro tunnels under high-speed railways.

scholarly journals Evolution of Rheological Behaviors of Styrene-Butadiene-Styrene/Crumb Rubber Composite Modified Bitumen after Different Long-Term Aging Processes

Materials ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2345 ◽  
Author(s):  
Yangsheng Ye ◽  
Gang Xu ◽  
Liangwei Lou ◽  
Xianhua Chen ◽  
Degou Cai ◽  
...  
Keyword(s):  
Low Temperature ◽  
High Speed ◽  
Crumb Rubber ◽  
Modified Bitumen ◽  
High Speed Railway ◽  
Modified Asphalt ◽  
Styrene Butadiene Styrene ◽  
Styrene Butadiene ◽  
Butadiene Styrene

In this study, a new type of composite modified bitumen was developed by blending styrene-butadiene-styrene (SBS) and crumb rubber (CR) with a chemical method to satisfy the durability requirements of waterproofing material in the waterproofing layer of high-speed railway subgrade. A pressure-aging-vessel test for 20, 40 and 80 h were conducted to obtain bitumen samples in different long-term aging conditions. Multiple stress creep recovery (MSCR) tests, linear amplitude scanning tests and bending beam rheometer tests were conducted on three kinds of asphalt binders (SBS modified asphalt, CR modified asphalt and SBS/CR composite modified asphalt) after different long-term aging processes, including high temperature permanent deformation performance, resistance to low temperature thermal and fatigue crack. Meanwhile, aging sensitivities were compared by different rheological indices. Results showed that SBS/CR composite modified asphalt possessed the best properties before and after aging. The elastic property of CR in SBS/CR composite modified asphalt improved the ability to resist low temperature thermal and fatigue cracks at a range of low and middle temperatures. Simultaneously, the copolymer network of SBS and CR significantly improved the elastic response of the asphalt SBS/CR modified asphalt at a range of high temperatures. Furthermore, all test results indicated that the SBS/CR modified asphalt possesses the outstanding ability to anti-aging. SBS/CR is an ideal kind of asphalt to satisfy the demand of 60 years of service life in the subgrade of high speed railway.

scholarly journals Study on the impact of the Beijing–Shanghai high-speed railway on regional economic equity based on economic performance

2021 ◽  
Author(s):  
Heng Yang ◽  
Qiong Tong ◽  
Pan Zhao
Keyword(s):  
High Speed ◽  
Optimal Allocation ◽  
Research Result ◽  
Difference In Differences ◽  
High Speed Railway ◽  
Regional Economic ◽  
Big Cities ◽  
The Difference ◽  
The Impact ◽  
Economic Equity

AbstractAccording to the panel data of stations along the Beijing–Shanghai high-speed railway (BSHR) from 2008 to 2018, the influence of BSHR on regional economy of cities along the line is analyzed, and the influence of the opening of the BSHR on regional economic equity of cities along the line, through constructing the difference-in-differences model. The research result shows that the opening of the BSHR greatly promotes the growth of the GDP per capita of the site cities along the line and the optimal allocation of resources, such as labor, information and technology, and accelerates the two-way flow of factors of production between big cities and small and medium-sized cities at stations along the high-speed railway, makes high-quality resources from small and medium-sized cities flow to big cities along the line, while some backward resources from big cities gradually tilt toward small- and medium-sized cities along the line. In short, the opening of BSHR promotes the economic growth of the cities along the line, shortens the economic gap between the cities, is conducive to realizing regional economic equity.

scholarly journals Health services utilisation and responsiveness profiles in Iran: a provincial household study

2019 ◽  
Vol 7 (1) ◽  
pp. e000007 ◽  
Author(s):  
Mostafa Farahbakhsh ◽  
Homayoun Sadeghi Bazargani ◽  
Mohammad Saadati ◽  
Jafar Sadegh Tabrizi ◽  
Mina Golestani ◽  
...  
Keyword(s):  
Health Services ◽  
Health System ◽  
Health Resources ◽  
Cross Sectional ◽  
The Public ◽  
Significant Difference ◽  
System Responsiveness ◽  
Health System Responsiveness ◽  
East Azerbaijan ◽  
Barriers To Health

ObjectiveThe aim of this study was to describe health services utilisation and responsiveness in East Azerbaijan province, Iran.DesignA cross-sectional household study as part of a larger research on primary healthcare system.SettingWe carried out the study in East Azerbaijan Province, northwest Iran from July to September 2015.ParticipantsA total of 1318 households were included.ResultsMost of the participating households had social security health insurance. Heart failure or hypertension care, general outpatient care and arthritis care were the most used services. High services cost and inadequate medicine and medical equipment were introduced to be the main barriers to health services utilisation in Tabriz and province representative sample (PRS), respectively. Health system responsiveness mean score (the maximum is 100) was 33.71±16.15 (95% CI 32.45 to 34.97) in Tabriz and 32.02±14.3 (95% CI 30.9 to 33.13) in PRS, which showed significant difference (p≤0.02).ConclusionsDifferences in the utilisation and responsiveness of health services and distribution of health resources were observed between Tabriz and PRS. Evidently, health system responsiveness in both Tabriz and PRS was at low level. The results demonstrate the need for changing resource distribution policies and employing reactive health policies to response the public health.

scholarly journals Full-scale multi-functional test platform for investigating mechanical performance of track–subgrade systems of high-speed railways

2020 ◽  
Vol 28 (3) ◽  
pp. 213-231
Author(s):  
Wanming Zhai ◽  
Kaiyun Wang ◽  
Zhaowei Chen ◽  
Shengyang Zhu ◽  
Chengbiao Cai ◽  
...  
Keyword(s):  
High Speed ◽  
Mechanical Performance ◽  
Full Scale ◽  
Functional Test ◽  
Railway Track ◽  
High Speed Railway ◽  
Ballastless Track ◽  
Railway Infrastructure ◽  
Test Platform

Abstract Motivated by the huge practical engineering demand for the fundamental understanding of mechanical characteristics of high-speed railway infrastructure, a full-scale multi-functional test platform for high-speed railway track–subgrade system is developed in this paper, and its main functions for investigating the mechanical performance of track–subgrade systems are elaborated with three typical experimental examples. Comprising the full-scale subgrade structure and all the five types of track structures adopted in Chinese high-speed railways, namely the CRTS I, the CRTS II and the CRTS III ballastless tracks, the double-block ballastless track and the ballasted track, the test platform is established strictly according to the construction standard of Chinese high-speed railways. Three kinds of effective loading methods are employed, including the real bogie loading, multi-point loading and the impact loading. Various types of sensors are adopted in different components of the five types of track–subgrade systems to measure the displacement, acceleration, pressure, structural strain and deformation, etc. Utilizing this test platform, both dynamic characteristics and long-term performance evolution of high-speed railway track–subgrade systems can be investigated, being able to satisfy the actual demand for large-scale operation of Chinese high-speed railways. As examples, three typical experimental studies are presented to elucidate the comprehensive functionalities of the full-scale multi-functional test platform for exploring the dynamic performance and its long-term evolution of ballastless track systems and for studying the long-term accumulative settlement of the ballasted track–subgrade system in high-speed railways. Some interesting phenomena and meaningful results are captured by the developed test platform, which provide a useful guidance for the scientific operation and maintenance of high-speed railway infrastructure.

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