scholarly journals A study on small-world characteristics of Chinaäó»s high-speed railway networks

2016 ◽  
Author(s):  
Xin Yuan ◽  
Guo Liu ◽  
Kun Hui Ye
Keyword(s):  
High Speed ◽  
Small World ◽  
Clustering Coefficient ◽  
High Speed Rail ◽  
Attribute Data ◽  
The Social ◽  
The Difference ◽  
Global And Local ◽  
The Relationship ◽  
Space Method

The small-world model provides a useful perspective and method to study the topological structure and intrinsic characteristics of high-speed rail networks (HRNs). In this paper, the P-space method is used to examine global and local HRNs in China, meanwhile the adjacency matrix is developed, then the social network analysis and visualization tool UCINET is used to calculate the spatial and attribute data of HRNs at national and local levels in China. The small-world characteristics of whole HRNs are discussed, three networks which have different properties are determined, and a comparative analysis of the small-world effect is detected. Then, the relationship between the construction of high-speed rail and regional development of China is analysed. The results show that: 1) China's HRNs have small average path length ( L ) and large clustering coefficient (C ), representing a typical small-world network; 2) Local HRNs have a certain correlation with economic development. The reasons for the difference of HRNs with respect to characteristics among regions are eventually discussed.

scholarly journals Exploring Railway Network Dynamics in China from 2008 to 2017

2018 ◽  
Vol 7 (8) ◽  
pp. 320 ◽  
Author(s):  
Yaping Huang ◽  
Shiwei Lu ◽  
Xiping Yang ◽  
Zhiyuan Zhao
Keyword(s):  
High Speed ◽  
Rapid Development ◽  
Small World ◽  
Clustering Coefficient ◽  
Network Clustering ◽  
Railway Network ◽  
High Speed Rail ◽  
Network Characteristics ◽  
Scale Free ◽  
Stage 1

China’s high speed rail (HSR) network has been rapidly constructed and developed during the past 10 years. However, few studies have reported the spatiotemporal changes of railway network structures and how those structures have been affected by the operation of high speed rail systems in different periods. This paper analyzes the evolving network characteristics of China’s railway network during each of the four main stages of HSR development over a 10-year period. These four stages include Stage 1, when no HSR was in place prior to August 2008; Stage 2, when several HSR lines were put into operation between August 2008, and July 2011; Stage 3, when the network skeleton of most main HSR lines was put into place. This covered the period until January 2013. Finally, Stage 4 covers the deep intensification of several new HSR lines and the rapid development of intercity-HSR railway lines between January 2013, and July 2017. This paper presents a detailed analysis of the timetable-based statistical properties of China’s railway network, as well as the spatiotemporal patterns of the more than 2700 stations that have been affected by the opening of HSR lines and the corresponding policy changes. Generally, we find that the distribution of both degrees and strengths are characterized by scale-free patterns. In addition, the decreasing average path length and increasing network clustering coefficient indicate that the small world characteristic is more significant in the evolution of China’s railway network. Correlations between different network indices are explored, in order to further investigate the dynamics of China’s railway system. Overall, our study offers a new approach for assessing the growth and evolution of a real railway network based on train timetables. Our study can also be referenced by policymakers looking to adjust HSR operations and plan future HSR routes.

scholarly journals The Relationship between High Speed Rail and Tourism

2020 ◽  
Vol 12 (12) ◽  
pp. 5103
Author(s):  
Rong-Chang Jou ◽  
Ke-Hong Chen
Keyword(s):  
High Speed ◽  
Research Review ◽  
Elastic Analysis ◽  
High Speed Rail ◽  
Transportation Mode ◽  
Related Research ◽  
The Difference ◽  
Socio Economic Variables ◽  
The Impact ◽  
The Relationship

Much research has verified that the active development of the High Speed Rail (HSR) can create business activities and promote tourism growth. However, based on the related research review, there is currently a lack of profound discussion on the development of the overall transportation system and tourism growth in Taiwan, thus, this study intends to discuss this issue and hopes to provide an important reference for future regional development. This study conducts an in-depth investigation of the relationship between HSR and tourism volume. The Difference in Difference (DID) model is used to verify the impact of HSR services on the tourism volume in Taiwan. In addition, the aggregate data of socio-economic variables and the constituent factors of the transportation mode are incorporated. Finally, the possible consequences are described through elastic analysis. The results of this study can be an important reference for the future development of counties and cities.

scholarly journals Is the High-Speed Rail Opening Environmentally Friendly? Taking the Difference-in-Differences Test in Jiangsu, China

Complexity ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Shijin Wang ◽  
Huiying Zhou ◽  
Guihong Hua
Keyword(s):  
Air Pollution ◽  
High Speed ◽  
Rapid Development ◽  
Central City ◽  
Control Variable ◽  
Difference In Differences ◽  
High Speed Rail ◽  
The Difference ◽  
The Impact ◽  
The Relationship

In view of rapid development of high-speed rail, the relationship between high-speed rail and air pollution needs to be tested and determined. Most research studies focused on the impact of high-speed rail on environmental pollution and just viewed high-speed rail as a control variable, which lacked a direct study on this relationship. Also, these rarely involved regional research, which is short of pertinence and insufficient understanding of regional issues. Therefore, based on the difference-in-differences (DID) model which is a natural experiment evaluation method, this study examined the impact of high-speed rail opening on air pollution by using the panel data of Jiangsu province, China, from the year of 2000 to 2017. The empirical results showed that the opening of Jiangsu high-speed rail, which increases cities’ good day significantly by 21.5%, has inhibitory effect on air pollution. Among control variables, there is no inverted “U” relationship between the economic development level and air pollution. Personal income and urbanization significantly improve air pollution, whereas foreign direct investment exacerbates it. And the results are still valid after robustness tests, including trend test and counterfactual test. Moreover, this study explores the relationship between the degree of reducing pollution caused by high-speed rail and the location of cities, which found that the opening of high-speed rail can greatly improve air pollution of areas in central city circle. Finally, it is found that when high-speed rail and other possible pollution items coexist, the improved effect of high-speed rail on air pollution is still obvious. Therefore, in order to exert the mitigating effect of high-speed rail on air pollution, it is necessary to rationally plan high-speed railway lines and develop the high-speed railways in cities closer to Shanghai.

scholarly journals Nuevos usos espaciales en las estaciones ferroviarias de alta velocidad/New space use of high speed railway stations

2018 ◽  
pp. 86-105
Author(s):  
Carlos Hugo Soria Caceres
Keyword(s):  
Public Space ◽  
Social Transformation ◽  
High Speed ◽  
Main Function ◽  
High Speed Rail ◽  
Railway Stations ◽  
The Public ◽  
Palabras Clave ◽  
The Social ◽  
New Space

RESUMENLas infraestructuras de transporte presentes sobre el territorio condicionan las relaciones sociales y de comunicación de muchos espacios. Grandes estaciones, puertos o aeropuertos se presentan como ejes de centralidad sobre los que se distribuyen flujos de mercancías y personas, configurando a su vez el diseño y la funcionalidad de las ciudades. Hoy en día, con el avance producido en sectores como el ferrocarril de alta velocidad, las estaciones han transformado su función principal de nudo de intercambio, proyectándose como nuevos espacios comerciales y de negocio. En este artículo se analiza este nuevo fenómeno de transformación espacial y social vinculado a la alta velocidad ferroviaria, focalizando su ámbito en España. Se desgrana a su vez el papel de las comunidades sociales, políticas y empresariales para la ciudad y el espacio público presentes en las nuevas estaciones de ferroviarias. Palabras clave: ferrocarril; espacio público; urbanismo. ABSTRACTThis work aims to discuss the transport infrastructures presents on the territory and the conditions to the social and communication relations of many spaces. Large stations, ports or airports are presented as axes of centrality on which flows of goods and people are distributed, configuring in turn the design and functionality of cities. Nowadays, with the advance produced in sectors such as high-speed rail, the stations have transformed their main function as an exchange hub, projecting themselves as new commercial and business spaces. This article analyzes this new phenomenon of spatial and social transformation linked to high-speed rail, focusing its scope in Spain. At the same time, the role of the social, political and business communities for the city and the public space present in the new railway stations.Keywords: railroad; public space; urbanism.

scholarly journals Kesantunan dalam Ritual Pernikahan Masyarakat Hindu-Bali; Kajian Etnopsikolingustik Religius

2020 ◽  
Vol 4 (1) ◽  
pp. 51
Author(s):  
Kadek Devi Kalfika Anggria Wardani
Keyword(s):  
Social Distance ◽  
The People ◽  
Observation Methods ◽  
The Social ◽  
Politeness Strategies ◽  
Hindu Community ◽  
The Difference ◽  
Traditional Marriage ◽  
The Relationship ◽  
Speech Situation

The study which is descriptive qualitative in nature, aims to investigate preference of politeness strategies by Balinese Hindu-community in traditional marriage ritual. Data was collected using interview and observation methods. Based on the results of data analysis, this research shows that the form of politeness that arises can be seen in terms of place, time, to the leaders of the people, during preparation, implementation, disclosure of the relationship with the Almighty, and after the completion of the ritual. The different forms of politeness that emerge can be seen from the use of Balinese in various levels which are adjusted to the social distance and speech situation. Besides being seen from the use of language, linguistic politeness is also evident from the attitude, intonation, and tone of the speaker. The difference in the form of politeness is intentionally raised to cause certain psychological impacts on the interlocutor.

scholarly journals 人工智能批判的話語悖論

2019 ◽  
Vol 17 (2) ◽  
pp. 133-137
Author(s):  
Fen LIN
Keyword(s):  
New Technologies ◽  
New Technology ◽  
Critical Issue ◽  
Human Beings ◽  
Policy Makers ◽  
Social Nature ◽  
The Social ◽  
The Difference ◽  
Medical Accident ◽  
The Relationship

LANGUAGE NOTE | Document text in Chinese; abstract in English only.In the dominant discourse of the "human–machine relationship," people and machines are the subjects, with a mutually shaping influence. However, this framework neglects the crux of the current critical analysis of AI. It reduces the problems with new technology to the relationship between people and machines, ignoring the re-shaping of the relationship between "people and people" in the era of new technology. This simplification may mislead policy and legal regulations for new technologies. Why would a robot killing cause more panic than a murder committed by a human? Why is a robot's misdiagnosis more troubling than a doctor's? Why do patients assume that machines make more accurate diagnoses than doctors? When a medical accident occurs, who is responsible for the mistakes of an intelligent medical system? In the framework of traditional professionalism, the relationship between doctors and patients, whether trusted or not, is based on the premise that doctors have specialized knowledge that patients do not possess. Therefore, the authority of a doctor is the authority of knowledge. In the age of intelligence, do machines provide information or knowledge? Can this strengthen or weaken the authority of doctors? It is likely that in the age of intelligence, the professionalism, authority and trustworthiness of doctors require a new knowledge base. Therefore, the de-skilling of doctors is not an issue of individual doctors, but demands an update of the knowledge of the entire industry. Recognizing this, policy makers must not focus solely on the use of machines, but take a wider perspective, considering how to promote the development of doctors and coordinate the relationship between doctors with different levels of knowledge development. We often ask, "In the era of intelligence, what defines a human?" This philosophical thinking should be directed toward not only the difference between machines and people as individuals, but also how the relationship between human beings, i.e., the social nature of humans, evolves in different technological environments. In short, this commentary stresses that a "good" machine or an "evil" machine—beyond the sci-fi romance of such discourse—reflects the evolution of the relationships between people. In today's smart age, the critical issue is not the relationship between people and machines. It is how people adjust their relationships with other people as machines become necessary tools in life. In the era of intelligence, therefore, our legislation, policy and ethical discussion should resume their focus on evolutionary relationships between people.DOWNLOAD HISTORY | This article has been downloaded 41 times in Digital Commons before migrating into this platform.

scholarly journals Preliminary Study on Assessing Delaminated Cracks in Cement Asphalt Mortar Layer of High-Speed Rail Track Using Traditional and Normalized Impact–Echo Methods

Sensors ◽  
2020 ◽  
Vol 20 (11) ◽  
pp. 3022
Author(s):  
Ying-Tzu Ke ◽  
Chia-Chi Cheng ◽  
Yung-Chiang Lin ◽  
Yi-Qing Ni ◽  
Keng-Tsang Hsu ◽  
...  
Keyword(s):  
High Speed ◽  
Concrete Slab ◽  
Amplitude Spectrum ◽  
Peak Frequency ◽  
High Speed Rail ◽  
Impact Echo ◽  
Rail Track ◽  
Cement Asphalt Mortar ◽  
The Difference ◽  
Ca Mortar

The severe deterioration of a cement asphalt (CA) mortar layer may lead to the movement of the upper concrete slab and impair the safety of the speedy train. In this study, a test specimen simulating the structure of high-speed rail track slabs was embedded with delaminated cracks in various lateral sizes inside the CA mortar layer. Impact–echo tests (IE) were performed above the flawed and flawless locations. In present study, the IE method is chosen to assess defects in the CA mortar layer. Both traditional IE and normalized IE are used for data interpolation. The normalized IE are the simulated transfer function of the original IE response. The peak amplitudes in the normalized amplitude spectrum and the peak frequency in the traditional amplitude spectrum for the top concrete overlay were used to develop simple indicators for identifying the integrity of the CA mortar layer. The index was based on the difference of the experimental peak amplitude and frequency of the ones calculated from previously developed formulas for plates without substrates. As a result, the technique does not require an experimental baseline for the crack assessment. A field test and analysis procedure for evaluating high-speed rail slab systems are proposed.

scholarly journals Evolution and Determinants of an Air Transport Network: A Case Study of the Chinese Main Air Transport Network

2019 ◽  
Vol 11 (14) ◽  
pp. 3933 ◽  
Author(s):  
Min Su ◽  
Weixin Luan ◽  
Zeyang Li ◽  
Shulin Wan ◽  
Zhenchao Zhang
Keyword(s):  
Network Structure ◽  
High Speed ◽  
Information Source ◽  
Small World ◽  
Transport Network ◽  
Air Transport ◽  
Promoting Effect ◽  
High Speed Rail ◽  
Path Lengths ◽  
The Impact

The Chinese main air transport network (CMATN) is the framework for air passenger transport in the country. This study uses complex networks and an econometric model to analyze CMATN’s evolution and determinants. In terms of overall network structure, the network has always shown small-world properties, with smaller average path lengths (2.06–2.15) and larger clustering coefficients (0.68–0.77), while its cumulative degree distribution follows an exponential function. City passenger volumes conform to the degree power law function, which means that the more destinations a city connects to, the higher its passenger traffic will be. In major hub cities, such as Beijing, Shanghai, and Guangzhou, control power decreases, while Chengdu, Kunming, Chongqing, Xi’an, Urumqi, and other cities play an increasingly important role in CMATN. In terms of main route passenger volumes and formation, increases in GDP and tourism have had a promoting effect, while high-speed rail (HSR) poses a threat to overlapping routes. CMATN is primarily located in the central and eastern regions, focusing on China’s economy, tourism, and efficient HSR development. Although the competition from HSR affects the overall network structure of CMATN based on its influence on specific routes, we believe that the impact is limited due to the different transport attributes of the two networks. The research results of this study can become an information source for decision makers and provide a reference for air transport to seek sustainable development.

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