Shiyan Zhai

ORCID: 0000-0002-1255-3513
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About
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Research Areas
  • Air Quality and Health Impacts
  • Climate Change and Health Impacts
  • Viral Infections and Immunology Research
  • Urban Transport and Accessibility
  • T-cell and Retrovirus Studies
  • Global Health Care Issues
  • Environmental Impact and Sustainability
  • Facility Location and Emergency Management
  • Plant responses to elevated CO2
  • Air Quality Monitoring and Forecasting
  • Animal Disease Management and Epidemiology
  • Climate change impacts on agriculture
  • Transportation Planning and Optimization
  • Climate variability and models
  • Energy, Environment, Economic Growth
  • Atmospheric chemistry and aerosols
  • Urban Green Space and Health
  • Asthma and respiratory diseases
  • Land Use and Ecosystem Services
  • Energy, Environment, and Transportation Policies
  • Agricultural risk and resilience
  • Noise Effects and Management
  • COVID-19 impact on air quality
  • Hydrology and Drought Analysis
  • Evacuation and Crowd Dynamics

Henan University
2017-2025

Geospatial Research (United Kingdom)
2020

Guangdong Medical College
2019

Nanyang Normal University
2019

East China Normal University
2011-2017

Chinese Academy of Sciences
2012

This study aims to evaluate the impacts of climate change and technical progress on wheat yield per unit area from 1970 2014 in Henan, largest agricultural province China, using an autoregressive distributed lag approach. The bounded F-test for cointegration among model variables yielded evidence a long-run relationship change, progress, area. In long run, machinery fertilizer use both had significantly positive yield. A 1% increase aggregate quantity increased by 0.19%. Additionally,...

10.1371/journal.pone.0184474 article EN cc-by PLoS ONE 2017-09-26

Background: The recent global COVID-19 pandemic serves as another reminder that people in different urban neighborhoods need equal access to basic medical services. This study aims improve the spatial accessibility of healthcare services toward ‘15-minute city’ goal. Methods: We chose Zhengzhou, China, a case study. To accessibility, two optimization models optimal supply-demand allocation (OSD) and capacitated p-medina problem (CPMP) were used. Spatial this is defined walking time from...

10.3390/ijgi11080436 article EN cc-by ISPRS International Journal of Geo-Information 2022-08-01

Green space exposure is considered an important aspect of a livable environment and human well-being. It often regarded as indicator social justice. However, due to the difficulties in obtaining green data from ground-based view, effective evaluation inequity at community level remains challenging. In this study, we presented assessment framework, integrating View Index (GVI), deep learning, spatial statistical analysis methods, urban rental price big analyze toward “15-minute city”...

10.3390/ijerph19105798 article EN International Journal of Environmental Research and Public Health 2022-05-10

ABSTRACT Equitable access to primary healthcare services can considerably improve citizens' health and well‐being. However, most location–allocation models emphasize efficiency, such as minimizing total travel cost maximizing demand coverage while overlooking spatial equality. Therefore, this study addresses the issue of equality planning for facilities by proposing a new framework evaluation, optimization, validation. Using county‐level city Changyuan in China case study, researchers...

10.1111/tgis.70031 article EN Transactions in GIS 2025-03-26

Abstract Background Hand, foot and mouth disease (HFMD) incidence is a critical challenge to control prevention in parts of China, particularly Guangxi. However, the association between socioeconomic factors meteorological on HFMD still unclear. Methods This study applied global local Moran’s I examine spatial pattern series analysis explore temporal pattern. The effects Guangxi, China were analyzed using GeoDetector Model. Results collected 45,522 cases from 87 counties Guangxi during 2015,...

10.1186/s12889-019-7619-y article EN cc-by BMC Public Health 2019-11-08

This paper examines the causal relationship among economic growth, energy structure, R&D investment and carbon emission in China by using autoregressive distributed lag bounds testing approach of cointegration during period 1990-2011. In order to examine this linkage, authors use two-step procedures. Firstly, conducted unit root tests measure whether single integrated time series is not more than 1. Secondly, explore long-run relationships between variables ARDL complemented...

10.1109/geoinformatics.2013.6626205 article EN 2013-06-01

Mental health is one of the main factors that significantly affect one's life. Previous studies suggest streets are activity space for urban residents and have important impacts on human mental health. Existing studies, however, not fully examined relationships between streetscape characteristics people's a street level. This study thus aims to explore spatial patterns features their associations with residents' by age sex in Zhanjiang, China. Using Baidu Street View (BSV) images deep...

10.3390/ijerph192416634 article EN International Journal of Environmental Research and Public Health 2022-12-11

Facing the challenge of climate change, forecasts energy demand and carbon emissions are a key requirement for India to ensure security balance economic growth. The authors calculate optimal growth under path from 2009 2050 in based on economy-carbon dynamic model. Combination Intergovernmental Panel Climate Change (IPCC) 2006 edition formula emissions, intensity model, population it gets caused by consumption time span 1980-2008. Then, estimates 2050. results show that cumulative amount...

10.4236/sgre.2012.33026 article EN Smart Grid and Renewable Energy 2012-01-01

Abstract Emergency medical services (EMS) is a system that provides emergency care for incidents involving serious illness or injury. The location of EMS stations plays an essential role in delivering effective and efficient services. Numerous models have been developed locating sizing stations. However, it remains challenging to satisfy all planning criteria within single model. In this study, multi-period capacitated facility problem with maximum travel time backup service (EMSLSP)...

10.1007/s43762-024-00143-z article EN cc-by Computational Urban Science 2024-11-01

Rapid and timely testing is essential to minimize the COVID-19 spread. Decision makers policy planners need determine equal distribution accessibility of sites. This study mainly examines spatial equality sites that maintain a zero COVID in Guangzhou City. The has identified disparities sites, characteristics locations, accessibility. obtained information on City population data. Point pattern analyses, Euclidian distance allocation, network analyses are main methods used achieve research...

10.4236/jgis.2024.163012 article EN Journal of Geographic Information System 2024-01-01

The study aimed to determine if and how environmental factors correlated with asthma admission rates in geographically different parts of Guangxi province China.Guangxi, China.This was done among 7804 patients.Spearman correlation coefficient used estimate between hospitalisation multiple regions. Generalised additive model (GAM) Poisson regression effects on 14 regions Guangxi.The strongest effect carbon monoxide (CO) found lag1 Hechi, every 10 µg/m3 increase CO caused an 25.6% rate (RR...

10.1136/bmjopen-2020-038117 article EN cc-by-nc BMJ Open 2020-10-01

Bei-bu winter wheat region (BBWR) is located in the northern boundary of area China. The ecological environment relatively poor. Drought a major natural hazard that harms growth this region. Based on daily rainfall data recorded at 45 national meteorological stations within BBWR between 1960 and 2012, we calculated Standardized Precipitation Index (SPI), measure drought. We also addressed changes drought occurrence across using intensity, frequency coverage. Results show that: (1) there were...

10.1109/geoinformatics.2017.8090920 article EN 2017-08-01

This article deals with the location problem for balancing service efficiency and equality. In public systems, some people may feel envy in case that they need longer travel distance to access services than others. The strength of can be measured by comparing one's facility a threshold distance. Using total function, four extended p-median problems are proposed trade-off between Five analytical properties new mathematically proven. were tested on three sets well-designed instances....

10.48550/arxiv.2312.14408 preprint EN cc-by arXiv (Cornell University) 2023-01-01

Abstract Background The association between environmental factors and asthma has attracted much attention. Numerous studies have focused on the effects of air pollution or meteorological factors, but synergistic regional heterogeneity remain unclear. Methods Between 2014 2015, 8,563 hospital admissions in 7,804 2015 due to were collected from 14 regions Guangxi, China. First, we performed a Spearman correlation coefficient model as single factor analysis estimate hospitalization rates...

10.21203/rs.2.18564/v1 preprint EN cc-by Research Square (Research Square) 2019-12-10
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