检索结果-内蒙古大学图书馆

Spatiotemporal Dynamics of Maize, Wheat, and Paddy Production in China During 1950-2022

INTERNATIONAL JOURNAL OF PLANT PRODUCTION 2025年 1-15页

作者： Yu, Xuan Zhao, Chenyu Zhang, Fangmin Nanjing Univ Informat Sci & Technol Collaborat Innovat Ctr Forecast Evaluat Meteorol D Sch Ecol & Appl Meteorol Jiangsu Key Lab Agr Meteorol Nanjing 210044 Peoples R China

Understanding the spatiotemporal dynamics of grain production is crucial for sustainable agricultural development and food security. This study employs linear regression, Moran's I, the gravity model, and yield-area decomposition, considering both temporal and spatial dimensions, to comprehensively examine the temporal trends, spatial patterns, and interregional relationships of maize, wheat, and paddy production. The findings are intuitive, widely applicable, and have strong spatial explanatory power, providing a scientific foundation for policy formulation and regional optimization. Results indicate that: (1) Maize output and sown area experienced stable growth (1950-1999) and rapid growth (2000-2022). Wheat and paddy outputs grew during 1950-1997 and 2004-2022, but declined between 1998 and 2003, primarily due to grain policy reforms and falling crop prices, with sown areas fluctuating significantly. All crop yields steadily increased. (2) Grain production exhibited significant spatial clustering (P < 0.1). Maize exhibited a "higher in the north, lower in the south" pattern, with significant growth across most provinces. Wheat was concentrated in the Huang-Huai-Hai Plain but declined in northern and southern regions. Paddy exhibited a "higher in the south, lower in the north" pattern, with stronger growth in the south. (3) Production centroids for maize and paddy migrated northeastward, while wheat shifted southeastward. (4) Maize production was driven by the interaction of sown area and yield, while wheat and paddy were yield-dominant. Over time, the expansion of sown area became the primary contributor to output growth for all three crops. More attention should be devoted to stabilizing and expanding sown areas to enhance grain production.

关键词： Crop production Spatiotemporal dynamics exploratory spatial data analysis Production centroid Food security

来源：评论

学校读者我要写书评

暂无评论

Assessment of spatial-temporal differences of industrial eco-efficiency in the huaihe river economic belt

引用

GEOJOURNAL 2023年第2期88卷 1703-1720页

作者： Zhao, Yangqiu He, Gang Bao, Keyu Zhu, Yanna Yang, Jingwen Ruan, Jun Wang, Yingying Anhui Univ Sci & Technol Coll Econ & Management 168 Taifeng St Huainan 232001 Anhui Peoples R China State Key Lab Min Response & Disaster Prevent & C Huainan 232001 Anhui Peoples R China

To promote the coordinated and healthy development of ecology and economy of Huaihe River Economic Belt, the paper tries to make an exploration of the path of industrial eco-efficiency improvement. This study chooses 25 prefecture-level cities in Huaihe River Economic Belt of China as the case studies, then selects Slacks-Based Measure with Undesirable (SBM-Undesirable) model, Malmquist-Luenberger (ML) index and Kernel Density Estimation and analyses the characteristics of industrial eco-efficiency from 2010 to 2019. Then, the spatial distribution characteristics of industrial eco-efficiency were investigated based on exploratory spatial data analysis (ESDA). The results of the above situation indicate that: (1) The overall efficiency level of industrial eco-efficiency of the Huaihe River Economic Belt has been relatively low from 2009 to 2018. The efficiency growth of regional industrial eco-efficiency showed a distribution pattern that the Eastern Sea-River-Lake Linkage Zone was greater than that in the Northern Huaihai Economic Zone and that in the Midwestern Inland Rising Zone. (2) The kernel density curve of industrial eco-efficiency shifts to the right, the efficiency increases but the internal difference was great. The Technical Change (TC) index decomposed from ML index is the key factor affecting the industrial eco-efficiency. (3) The industrial eco-efficiency of the Huaihe River Economic Belt shows a decreasing trend from the northeast to the southwest, and the efficiency changes greatly in the north-south direction, with obvious spatial agglomeration, strong spatial stability and dependence. Therefore, this study estimated the ratio of the economic and ecological output to the input required for industrial production and focused on the identification of differences of efficiency. It was conducive to transforming the mode of industrial development and promoting the harmonious development of industrial ecology, and taking the road of sustainable development

关键词： Kernel Density Estimation exploratory spatial data analysis Industrial eco-efficiency Huaihe River Economic Belt

来源：评论

学校读者我要写书评

暂无评论

Hit the Road: spatial Characteristics of Labor Absorption in South Africa

引用

PROFESSIONAL GEOGRAPHER 2024年第3期76卷 331-342页

作者： Weir-Smith, Gina Dlamini, Simangele Human Sci Res Council Pretoria South Africa Univ Witwatersrand Johannesburg South Africa

Unequal spatial concentration is at the heart of economic imbalance in South Africa. This research aimed at spatially characterizing labor absorption patterns and exploring the link to spatial development. Labor absorption is often used as an indicator of labor market well-being and for many countries, the indicator is often more insightful than the unemployment rate. The research used secondary data to create a longitudinal data set of labor absorption, functional literacy, the ratio of urban population and gross domestic product growth rate, among others, at a municipal level. exploratory spatial data analysis and thematic mapping were undertaken to illustrate the characteristics of the labor market, while spatial grouping created clusters of municipalities based on labor absorption. A positive upward trend was observed between labor absorption and the share of people in an urban area;that is, the more urban an area, the higher the labor absorption rate. Furthermore, the spatial clustering of municipalities highlighted linear patterns and when this was overlayed with roads and development corridors, clearly indicated the impact of regional spillovers. The findings suggest a more integrated focus on regional innovation policy to reduce spatial disparities in the economic landscape.

关键词： Words: development corridors exploratory spatial data analysis labor absorption spatial grouping thematic mapping

来源：评论

学校读者我要写书评

暂无评论

Residential Segregation of Foreign Immigrants in South Korea by Country-of-Birth Income

引用

GROWTH AND CHANGE 2024年第4期55卷

作者： Kim, Chanyong Kim, Donghyun Korea Res Inst Human Settlements Natl Terr & Reg Res Div Sejong South Korea Pusan Natl Univ Dept Urban Planning & Engn Busan South Korea

This study examines changes in spatial distribution and residential segregation patterns of immigrant groups in South Korea from 2008 to 2021. Since the mid-1990s, the immigrant community has increased rapidly;however, geographical stratification has intensified among heterogeneous immigrant groups. Foreign immigrants from 195 countries are divided into four groups based on the average income in the country of birth. Dissimilarity and multigroup entropy indices were adopted to explore the aspatial aspects of immigrant segregation. exploratory spatial data analysis was used to examine the spatial separation of foreign clusters. The implications of these results are threefold. First, immigrant residential segregation is as serious as in developed countries and has deepened. Second, immigrants from advanced economies are concentrated in Seoul, while immigrants from upper-middle economies are clustered in the southwestern part of the capital region. In contrast, immigrants born in lower-middle class and underdeveloped countries are distributed among rural and manufacturing areas in the non-capital region. Finally, the differences in the course of economic migration according to socioeconomic background are considered to be the decisive cause of the spatial segregation of immigrants. This study challenges policymakers engaged in integrating immigrant communities in South Korea.

关键词： community development country of birth income exploratory spatial data analysis immigrant residential segregation multigroup entropy index

来源：评论

学校读者我要写书评

暂无评论

The colocation of primary care physicians and audiologists in the Chicago metro region reinforces racial, ethnic, and class inequities in spatial access to care

引用

WORLD MEDICAL & HEALTH POLICY 2024年第3期16卷 273-294页

作者： Planey, Arrianna Marie Thomas, Sharita R. Lewis, Jodi A. Maaita, Marah Univ N Carolina Gillings Sch Global Publ Hlth Dept Hlth Policy & Management Chapel Hill NC USA Univ North Carolina Chapel Hill Cecil G Sheps Ctr Hlth Serv Res Chapel Hill NC USA Gillings Sch Global Publ Hlth Dept Hlth Policy & Management McGavran Greenberg CB 1105C135 Dauer Dr Chapel Hill NC 27599 USA

In primary-care-centric models of care provision, specialist co-location with primary care physicians (PCPs) can potentially improve care coordination and continuity. This study asks whether the co-location of specialists with referring PCPs can reinforce racial, ethnic, and class inequities in spatial access to care. Given a US healthcare policy context wherein audiologist services are only reimbursed if they are medical practitioner-referred, audiologists are hypothesized to co-locate with PCPs. Using spatial cluster analysis and spatial regression approaches, this study quantifies the tendency for PCPs and audiologists to co-locate and analyzes the consequences for spatial access disparities in the Chicago, Illinois metropolitan region. Audiologists and PCPs co-cluster significantly across Chicagoland. The spatial lag model confirms racial, ethnic, and class disparities in network travel distance to audiology services in the core counties of the region. The results suggest that, for audiology services, health policies and the resultant interdependence across the hierarchy of care manifest spatially, possibly reinforcing service access disparities within segregated city regions.

关键词： audiologists exploratory spatial data analysis health care access hierarchy of care K-function primary care providers spatial analysis spatial regression

来源：评论

学校读者我要写书评

暂无评论

spatial and Multivariate Statistics in Assessing Water Quality in the North Sea 24th

Spatial and Multivariate Statistics in Assessing Water Quali...

引用

24th International Conference on Computational Science and Its Applications (ICCSA)

作者： Ody, Christopher Ramos, M. Rosario Carolino, E. Univ Aberta Lisbon Portugal Inst Politecn Lisboa H & TRC Hlth & Technol Res Ctr ESTeSL Escola Super Tecnol Saude Lisbon Portugal Univ Lisbon Fac Ciencias CEAUL Ctr Estat & Aplicacoes Lisbon Portugal

ISBN: (纸本)9783031652226;9783031652233

The Southern North Sea region plays a vital role for both the economy and society of the surrounding countries. Analyzing the quality of your water is a critical process that involves an assessment of physical, chemical, and biological parameters, essential to guarantee environmental sustainability and the health of local communities and marine ecosystems. Using Multivariate and spatial Statistics methods, this study seeks to identify spatial patterns and autocorrelations to assess water quality in that region. The data set used was taken on a scientific cruise carried out in December 2020 aboard the RV Meteor vessel, led by a team of German researchers. The raw data went through pretreatment guided by the data Quality Control protocol of SeadataNet, an international oceanography project aimed at making European maritime data available. Spike and gradient tests were performed, in addition to data standardization and imputation through inverse distance weighting interpolation. For a better understanding of the scientific area, the data were aggregated by zones for certain analyses, and were sometimes considered globally. An exploratory spatial data analysis (ESDA) was carried out in order to summarize its main characteristics. A reduction in the dimensionality of the original data was carried out through principal component analysis as an auxiliary tool for spatial analysis. The spatial autocorrelation is analyzed by calculating global and local Moran's I Statistics. The outcomes indicate a significant spatial autocorrelation for all variables considered in the freshwater areas and a notable range flattening of the variables in the open sea areas, which possibly caused the lack of significant spatial autocorrelation in those areas.

关键词： exploratory spatial data analysis North Sea Principal components spatial correlation Water quality

来源：评论

学校读者我要写书评

暂无评论

spatial patterns on tourism establishments in five CIP´s in Mexico, 2010–2022

引用

Quality and Quantity 2023年 1-18页

作者： Prudencio-Vázquez, Jaime A. Martínez-Rodríguez, Alvaro Pérez-Victorino, Leonardo Álvarez-García, José Departamento de Economía Universidad Autónoma Metropolitana Unidad Azcapotzalco Ciudad de México 02128 Mexico Departamento de Economía Financiera y Contabilidad Instituto Universitario de Investigación para el Desarrollo Territorial Sostenible (INTERRA) Universidad de Extremadura Cáceres Spain

Studies on the spatial patterns of economic activity contribute to economic performance management, planning, and promotion. Investors, policymakers, and social organizations have access to valuable information on the concentration and location of activity. spatial patterns of tourism have been studied to better organize tourist flows, optimize existing infrastructure, plan new facilities, and promote new destinations. In the late 1960s, the Central Mexican government started projects aimed at constructing large tourism facilities primarily for foreign visitors. These were called centros integralmente planeados or “fully planned centers” (CIP’s) and were headed by Fondo Nacional de Fomento al Turismo (National Tourism Promotion Fund) FONATUR. The objective of this study is to explore the spatial distribution patterns of tourism establishments in five municipalities where CIP?s are located. The study uses exploratory spatial data analysis (ESDA) tools, such as average nearest neighbor index, standard deviation ellipse, spatial kernel density, global and local indicator of spatial autocorrelation, applied to geographic information system (GIS) data representing tourism establishments. The results show changes in establishment distribution and orientation, as well as spatial concentration in all cases and years. All CIP?s experienced a significant reduction in establishments, particularly small and medium-sized businesses. This paper is one of the first to analyze simultaneously the spatial distribution and concentration of tourism establishments in five municipalities where CIP’s are located. © 2023, The Author(s).

关键词： exploratory spatial data analysis Fully planned centers spatial patterns Tourism establishments

来源：评论

学校读者我要写书评

暂无评论

Slope characteristics of urban construction land and its correlation with ground slope in China

引用

OPEN GEOSCIENCES 2022年第1期14卷 1524-1537页

作者： Duan, Junhao Peng, Qiuzhi Huang, Peiyi Kunming Univ Sci & Technol Fac Land Resources Engn Kunming 650093 Yunnan Peoples R China Surveying & Mapping Geoinformat Technol Res Ctr Pl Kunming 650093 Yunnan Peoples R China Yunnan Nat Resources & Planning Intelligence Innov Kunming 650093 Yunnan Peoples R China

Since the 21st century, China's urban construction land has been growing rapidly, piquing academic interest. However, mountainous counties account for the majority in China, previous studies have concentrated on the horizontal expansion characteristics of construction land, leaving a gap in the vertical expansion. This study used datasets for urban construction land and digital elevation model to analyze the spatiotemporal evolution characteristics of construction land slope in 2670 China's counties, by exploratory spatial data analysis. Furtherly, we explored the slope relationship between ground and construction land using regression analysis. The findings indicate what follows: (1) The average slope of construction land had a spatial pattern of "high in the south and low in the north, " with significant spatial agglomeration characteristics. And it had increased with the urban expansion, shifting the slope-weighted mean center toward the southeast while enhancing spatial agglomeration. (2) There was a significant and steadily rising linear association between the urban construction land slope and ground slope, due to spatial heterogeneity;the most affected counties were primarily located near the Sichuan basin. According to the results, we provided suggestions for the rational use and sustainable development of land in cities, especially for mountainous regions in a period of rapid urbanization.

关键词： construction land slope exploratory spatial data analysis regression analysis China

来源：评论

学校读者我要写书评

暂无评论

Water shortage risk evaluation and its primary cause: Empirical evidence from rural China

引用

NATURAL RESOURCES FORUM 2022年第2期46卷 179-199页

作者： Liu Wenxin Yao, Zhang Xu Ruifan Zhen, Zhang Northwest A&F Univ Coll Econ & Management Yangling 712100 Shaanxi Peoples R China Guangdong Prov Comm CPC Party Sch Econ Teaching Sect Guangzhou Peoples R China

This study explores the level of rural water shortage risk from the perspective of disaster risk and poverty. Based on related causes and characteristics, we quantitatively analyze the water shortage risk in rural China during 1997-2019. Furthermore, the spatial and temporal evolution is tested based on the exploratory spatial data analysis (ESDA) and kernel density estimation (KDE) models. Finally, we use the obstacle model to explore the main factors affecting water shortage risk. The main conclusions are as follows: (1) The results show three types in rural China: high-risk areas, medium-risk areas, and low-risk areas. The rural water shortage risk declines over time, and the improvements in the rural areas are evident. (2) Within rural China, the trend shows positive spatial correlation and temporal variation. (3) Factors that impact the water shortage risk mainly include population with access to clean water, degree of damage caused by farmland flood and drought, soil erosion control area, drainage area of farmland, lag rate of the agricultural economy, agricultural population density, per capita water consumption, and fiscal self-sufficiency of the government. The research findings provide a theoretical foundation for the evaluation of rural water shortage risk and a regional strategy to relieve rural water shortage.

关键词： exploratory spatial data analysis kernel density estimation primary cause rural China water shortage risk

来源：评论

学校读者我要写书评

暂无评论

Multi-method investigations of the impact of lockdown relaxation on tourists' and residents' movements

引用

JOURNAL OF TRAVEL & TOURISM MARKETING 2023年第7期40卷 619-638页

作者： Shin, Seunghun Lee, Eunji Yhee, Yerin Kim, Jungkeun Koo, Chulmo Hong Kong Polytech Univ Sch Hotel & Tourism Management Hong Kong Peoples R China Kyung Hee Univ Smart Tourism Educ Platform STEP Seoul South Korea Auckland Univ Technol Dept Mkt Auckland New Zealand Kyung Hee Univ Smart Tourism Educ Platform STEP Kyung Hee Dearo 26 Seoul 02447 South Korea

This research examines the impact of lockdown relaxation on tourists' and residents' movements in the context of restaurant patronage in Jeju Island, South Korea. Drawing on spatial interaction and multi-attribute attitude theories, we hypothesized the difference between tourists and residents in terms of restaurant visit patterns and choices during lockdown relaxation. A multi-method approach was adopted: spatial, data-driven analysis, and experiments. Lockdown relaxation is found to affect how tourists and residents choose and visit restaurants in different ways. This research provides explanations about tourists' and residents' mobility and guidelines that practitioners can use to prepare for "living with COVID-19."

关键词： Lockdown relaxation tourists' movement residents' movement restaurant visit spatial interaction theory multi-attribute attitude theory multi-method investigation exploratory spatial data analysis data-driven analysis experimental study

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：