Liyan Xu
Biographic Data
| ID | 3635484 |
|---|---|
| NAME | Liyan Xu |
| GIVEN NAMES | Liyan |
| FAMILY NAME | Xu |
| SIGNATURE | XU L |
| AFFILIATIONS | Peking University |
| ORCID | 0000-0002-6933-3394 |
| VERIFIED | Yes |
| TOTAL WORKS | 20 |
| TOTAL CITATIONS | 20 |
| AUTHOR COUNT | 20 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2005 |
| LATEST PUBLICATION YEAR | 2026 |
| H-INDEX | 3 |
Massive Retail Location Choice as a Human‐Flow‐Covering Problem
In this article we reframe the massive location choice problem for retail chains by proposing an optimization model that integrates human mobility. Traditional methods of massive location choice encounter limitations rooted in assumptions such as power‐law distance decay and oversimplified travel patterns. In response, we present a spatial operations research model aimed at maximizing customer coverage, using massive individual trajectories as a …
Varying road network resilience of Chinese cities
China boasts a multitude of cities exhibiting distinctly spatial characteristics, leading to variations in resilience. While attention has been garnered in individual cities, comprehensive studies for the whole system are scarce. Visualising and comparing the variations of spatial resilience across cities prove valuable in understanding disparities among city systems in terms of their spatial development and resilience consequences. This research…
Inferring “high-frequent” mixed urban functions from telecom traffic
Precise distinction of mixed functions on urban land is essential for urban studies and planning, while existing methods are limited by high sampling bias, low observation frequency, and lack of semantic information in common data sources. In this paper, we introduce a new proxy for human behavior, the telecom traffic data as a remedy to the above limitations, and present an analytical framework which utilizes anonymized and aggregated telecom tr…
The effects of professional design training on urban public space perception: A virtual reality study with physiological and psychological measurements
Enhancing Urban Resilience Through Spatial Interaction-Based City Management Zoning
Good city management is essential in mitigating the impact of various crisis events and thus enhances urban resilience. The current zoning system that underlies China’s city management system, however, hardly meets the resilient requirements in failing to appropriately and flexibly allocate patrol personnel under normal and various crisis scenarios. We propose an optimization method that gives rise to a resilient city management zoning system by …
A high body mass index strengthens the association between the time of eye rubbing and keratoconus in a Chinese population: A case control study
These findings suggested that a high BMI aggravated the negative effect of eye rubbing on KC, implying that individuals with a high BMI may be more susceptible to exposure to eye rubbing, which is related to an increased risk of KC
"A Two-Layer Location Choice Model Reveals What's New in the "New Retail
The New Retail is an emerging e-commerce model in recent years. It claims innovation in creating competitive advantages through intensive Internet-based data to promote online-to-offline interactions. Whether this self-claimed innovation would cause a different rationale in the choice of store locations is a subject worthy of investigation. In this article, taking Beijing’s Starbucks and Luckin coffee stores as cases, we build a two-layer busines…
A social sensing approach for everyday urban problem-handling with the 12345-complaint hotline data
Comparative Diagnosis of the Urban Noise Problem from Infrastructural and Social Sensing Approaches: A Case Study in Ningbo, China
Urban noise causes a variety of health problems, and its prevention and control have thus become an important research topic in urban governance. Although existing literature is fairly comprehensive in revealing the physical noise patterns, it lacks the concern of people's perceived seriousness, especially at the macroscopic, i.e., citywide scale. In this paper, we borrow from the "exposure-perception-behavior" theory in environmental psychology,…
Environment-deterministic pedestrian behavior? New insights from surveillance video evidence
Spatiotemporal patterns and mechanisms of street vending from the social sensing perspective: A comparison between law-enforcement reported and residents complain events
Analysis of the Uniqueness and Similarity of City Landscapes Based on Deep Style Learning
The city landscape is largely related to the design concept and aesthetics of planners. Influenced by globalization, planners and architects have borrowed from available designs, resulting in the “one city with a thousand faces” phenomenon. In order to create a unique urban landscape, they need to focus on local urban characteristics while learning new knowledge. Therefore, it is particularly important to explore the characteristics of cities’ la…
The Impact of Covid-19 on Pedestrian Flow Patterns in Urban POIs—An Example from Beijing
The COVID-19 pandemic is a major challenge for society as a whole, and analyzing the impact of the spread of the epidemic and government control measures on the travel patterns of urban residents can provide powerful help for city managers to designate top-level epidemic prevention policies and specific epidemic prevention measures. This study investigates whether it is more appropriate to use groups of POIs with similar pedestrian flow patterns …
Multi-scale detection and interpretation of spatio-temporal anomalies of human activities represented by time-series
Emotional Responses to the Visual Patterns of Urban Streets: Evidence from Physiological and Subjective Indicators
Despite recent progress in the research of people's emotional response to the environment, the built-rather than natural-environment's emotional effects have not yet been thoroughly examined. In response to this knowledge gap, we recruited 26 participants and scrutinized their emotional response to various urban street scenes through an immersive exposure experiment using virtual reality. We utilized new physiological monitoring technologies that…
Ecological Extension of Regulatory Planning in China’s Territorial Spatialplanning System: A Case Study on Mentougou District, Beijing
The current reform of China’s territorial spatial planning system is with profound expectation. Key to the implementation of spatial plans, regulatory detailed planning needs an improvement in preparation methods, indicator systems, coordination, and feasibility, etc. More work is urgently needed to make up the deficiencies of land use regulation and ecological restoration of territorial spaces. This paper devises methods for the ecological exten…
Urban green spaces, their spatial pattern, and ecosystem service value: The case of Beijing
Trends in Community Pharmacy Counts and Closures Before and After the Implementation of Medicare Part D: Medicare Part D and Retail Pharmacy Availability
PURPOSE: Medicare Part D provided 3.4 million American seniors with prescription drug insurance. It may also have had an unintended effect on pharmacy viability. This study compares trends in the number of pharmacies and rate of pharmacy closures before and after the implementation of Medicare Part D. METHODS: This retrospective observational study used data from National Council for Prescription Drug Programs (NCPDP) to track retail pharmacy clo…
Evaluating Community-based Programs for Eliminating Secondhand Smoke Using Evidence-based Research for Best Practices
Extensive research has been conducted on the hazardous effects of tobacco use, and more recently attention has focused on the harmful effects of secondhand smoke (SHS). A growing body of evidence-based research supports best practices for eliminating SHS. This article describes the evaluation and outcomes of a community-based coalition in the midwest that used best practices to educate and change public attitudes on SHS, and thereby promote socia…
The Federal Employees Health Benefits Program: Model for Competition in Rural America
Context : The Medicare Prescription Drug, Improvement, and Modernization Act of 2003 (MMA) created the Medicare Advantage (MA) program, which promotes the entry of private Preferred Provider Organization (PPO) plans into regions that have not previously had Medicare managed care plans. The assumption that a competitive environment will develop is based on experiences in the Federal Employees Health Benefits Program (FEHBP). Purpose : The authors …
Urban green spaces, their spatial pattern, and ecosystem service value: The case of Beijing
Enhancing Urban Resilience Through Spatial Interaction-Based City Management Zoning
Good city management is essential in mitigating the impact of various crisis events and thus enhances urban resilience. The current zoning system that underlies China’s city management system, however, hardly meets the resilient requirements in failing to appropriately and flexibly allocate patrol personnel under normal and various crisis scenarios. We propose an optimization method that gives rise to a resilient city management zoning system by …
Spatiotemporal patterns and mechanisms of street vending from the social sensing perspective: A comparison between law-enforcement reported and residents complain events
"A Two-Layer Location Choice Model Reveals What's New in the "New Retail
The New Retail is an emerging e-commerce model in recent years. It claims innovation in creating competitive advantages through intensive Internet-based data to promote online-to-offline interactions. Whether this self-claimed innovation would cause a different rationale in the choice of store locations is a subject worthy of investigation. In this article, taking Beijing’s Starbucks and Luckin coffee stores as cases, we build a two-layer busines…
The effects of professional design training on urban public space perception: A virtual reality study with physiological and psychological measurements
The Federal Employees Health Benefits Program: Model for Competition in Rural America
Context : The Medicare Prescription Drug, Improvement, and Modernization Act of 2003 (MMA) created the Medicare Advantage (MA) program, which promotes the entry of private Preferred Provider Organization (PPO) plans into regions that have not previously had Medicare managed care plans. The assumption that a competitive environment will develop is based on experiences in the Federal Employees Health Benefits Program (FEHBP). Purpose : The authors …
Evaluating Community-based Programs for Eliminating Secondhand Smoke Using Evidence-based Research for Best Practices
Extensive research has been conducted on the hazardous effects of tobacco use, and more recently attention has focused on the harmful effects of secondhand smoke (SHS). A growing body of evidence-based research supports best practices for eliminating SHS. This article describes the evaluation and outcomes of a community-based coalition in the midwest that used best practices to educate and change public attitudes on SHS, and thereby promote socia…
Trends in Community Pharmacy Counts and Closures Before and After the Implementation of Medicare Part D: Medicare Part D and Retail Pharmacy Availability
PURPOSE: Medicare Part D provided 3.4 million American seniors with prescription drug insurance. It may also have had an unintended effect on pharmacy viability. This study compares trends in the number of pharmacies and rate of pharmacy closures before and after the implementation of Medicare Part D. METHODS: This retrospective observational study used data from National Council for Prescription Drug Programs (NCPDP) to track retail pharmacy clo…
Urban green spaces, their spatial pattern, and ecosystem service value: The case of Beijing
Ecological Extension of Regulatory Planning in China’s Territorial Spatialplanning System: A Case Study on Mentougou District, Beijing
The current reform of China’s territorial spatial planning system is with profound expectation. Key to the implementation of spatial plans, regulatory detailed planning needs an improvement in preparation methods, indicator systems, coordination, and feasibility, etc. More work is urgently needed to make up the deficiencies of land use regulation and ecological restoration of territorial spaces. This paper devises methods for the ecological exten…
Analysis of the Uniqueness and Similarity of City Landscapes Based on Deep Style Learning
The city landscape is largely related to the design concept and aesthetics of planners. Influenced by globalization, planners and architects have borrowed from available designs, resulting in the “one city with a thousand faces” phenomenon. In order to create a unique urban landscape, they need to focus on local urban characteristics while learning new knowledge. Therefore, it is particularly important to explore the characteristics of cities’ la…
The Impact of Covid-19 on Pedestrian Flow Patterns in Urban POIs—An Example from Beijing
The COVID-19 pandemic is a major challenge for society as a whole, and analyzing the impact of the spread of the epidemic and government control measures on the travel patterns of urban residents can provide powerful help for city managers to designate top-level epidemic prevention policies and specific epidemic prevention measures. This study investigates whether it is more appropriate to use groups of POIs with similar pedestrian flow patterns …
Multi-scale detection and interpretation of spatio-temporal anomalies of human activities represented by time-series
Emotional Responses to the Visual Patterns of Urban Streets: Evidence from Physiological and Subjective Indicators
Despite recent progress in the research of people's emotional response to the environment, the built-rather than natural-environment's emotional effects have not yet been thoroughly examined. In response to this knowledge gap, we recruited 26 participants and scrutinized their emotional response to various urban street scenes through an immersive exposure experiment using virtual reality. We utilized new physiological monitoring technologies that…
A social sensing approach for everyday urban problem-handling with the 12345-complaint hotline data
Comparative Diagnosis of the Urban Noise Problem from Infrastructural and Social Sensing Approaches: A Case Study in Ningbo, China
Urban noise causes a variety of health problems, and its prevention and control have thus become an important research topic in urban governance. Although existing literature is fairly comprehensive in revealing the physical noise patterns, it lacks the concern of people's perceived seriousness, especially at the macroscopic, i.e., citywide scale. In this paper, we borrow from the "exposure-perception-behavior" theory in environmental psychology,…
Environment-deterministic pedestrian behavior? New insights from surveillance video evidence
Spatiotemporal patterns and mechanisms of street vending from the social sensing perspective: A comparison between law-enforcement reported and residents complain events
A high body mass index strengthens the association between the time of eye rubbing and keratoconus in a Chinese population: A case control study
These findings suggested that a high BMI aggravated the negative effect of eye rubbing on KC, implying that individuals with a high BMI may be more susceptible to exposure to eye rubbing, which is related to an increased risk of KC
"A Two-Layer Location Choice Model Reveals What's New in the "New Retail
The New Retail is an emerging e-commerce model in recent years. It claims innovation in creating competitive advantages through intensive Internet-based data to promote online-to-offline interactions. Whether this self-claimed innovation would cause a different rationale in the choice of store locations is a subject worthy of investigation. In this article, taking Beijing’s Starbucks and Luckin coffee stores as cases, we build a two-layer busines…
Varying road network resilience of Chinese cities
China boasts a multitude of cities exhibiting distinctly spatial characteristics, leading to variations in resilience. While attention has been garnered in individual cities, comprehensive studies for the whole system are scarce. Visualising and comparing the variations of spatial resilience across cities prove valuable in understanding disparities among city systems in terms of their spatial development and resilience consequences. This research…
Inferring “high-frequent” mixed urban functions from telecom traffic
Precise distinction of mixed functions on urban land is essential for urban studies and planning, while existing methods are limited by high sampling bias, low observation frequency, and lack of semantic information in common data sources. In this paper, we introduce a new proxy for human behavior, the telecom traffic data as a remedy to the above limitations, and present an analytical framework which utilizes anonymized and aggregated telecom tr…
The effects of professional design training on urban public space perception: A virtual reality study with physiological and psychological measurements
Enhancing Urban Resilience Through Spatial Interaction-Based City Management Zoning
Good city management is essential in mitigating the impact of various crisis events and thus enhances urban resilience. The current zoning system that underlies China’s city management system, however, hardly meets the resilient requirements in failing to appropriately and flexibly allocate patrol personnel under normal and various crisis scenarios. We propose an optimization method that gives rise to a resilient city management zoning system by …
Massive Retail Location Choice as a Human‐Flow‐Covering Problem
In this article we reframe the massive location choice problem for retail chains by proposing an optimization model that integrates human mobility. Traditional methods of massive location choice encounter limitations rooted in assumptions such as power‐law distance decay and oversimplified travel patterns. In response, we present a spatial operations research model aimed at maximizing customer coverage, using massive individual trajectories as a …
Computer Science (14 works) · Geography (13 works) · Business (9 works) · Engineering (7 works) · Medicine (7 works) · China (6 works) · Economics (6 works) · Human Mobility and Location-Based Analysis (6 works) · Artificial Intelligence (5 works) · Land Use and Ecosystem Services (5 works)