Suburbanization and Subcentering of Population in Beijing Metropolitan Area:A Nonparametric Analysis

This study focuses on the suburbanization and subcentering of population and examines the nature of spatial restructuring in terms of the population distribution in the Beijing metropolitan area.Instead of the classic density function approach,we employ the nonparametric analysis to characterize the spatial pattern of population densities in the Beijing metropolitan area and identify the suburban subcenters.Our findings suggest that the population has spread with rapid urban growth in the Beijing metropolitan area,and the compact urban form has been replaced by a more dispersed polycentric spatial distribution.However,compared with the decentralization of western cities,the spatial extent of the decentralization of population in the Beijing metropolitan area is quite limited.The rapid growth of population in the near suburbs has expedited the sprawl of the central city,with a larger central agglomeration of population dominating the metropolitan area.In this sense,the spatial pattern of the Beijing metropolitan area is still characterized by the continuous compactness.However,our findings do provide the evidence that the city has been turning to a polycentric structure.We find significant population subcenters have emerged in the suburbs of Beijing since the 1980s.But the polycentricity emerged in the Beijing metropolitan area is very different by nature from that observed in Western cities.The subcenters emerged are adherent to the development scheme planned for the city,so it can be referred to as the so called 'planned polycentricity'.

Breast Milk Lead and Cadmium Levels in Suburban Areas of Nanjing,China

Objective To evaluate levels of lead(Pb) and cadmium(Cd) in the breast milk in the second postpartum month,to investigate the relationship between Pb/Cd levels in breast milk and some sociodemographic parameters,and to explore whether these levels affect the infants' physical status or the mothers' psychological status(postpartum depression).Methods A cross-sectional study was conducted between November 2009 and December 2010.Altogether 170 healthy mothers were enrolled from Nanjing Maternity and Child Health Care Hospital.The inclusion criteria were:voluntary to participate in this study,healthy,with no chronic disease,breastfeeding in the second postpartum month,living in a suburban but not non-industrial area of Nanjing,and not occupationally exposed to toxic metals.All the mothers completed a questionnaire and were evaluated based on the Edinburgh Postpartum Depression Scale(EPDS) to identify the risk of postpartum depression.Pb and Cd levels in breast milk were determined by inductively coupled plasma mass spectroscopy.The infants of these mothers were examined for their z scores of weight for age,length for age,head circumference for age,and body mass index for age.Results The median breast milk levels of Pb and Cd were 40.6 μg/L and 0.67 μg/L,respectively.In 164(96.5%) of the 170 samples,Pb levels were higher than the limit reported by the World Health Organization(> 5 μg/L).Breast milk Cd level was > 1 μg/L in 54(31.8%) mothers.The mothers with a history of anemia had a higher breast milk Pb level than those without a history of anemia(41.1 μg/L vs.37.9 μg/L,P = 0.050).The median breast milk Cd level in those who were active and passive smokers during pregnancy was significantly higher than that in non-smokers(0.88 μg/L vs.0.00 μg/L,P = 0.025).The breast milk Cd level in the mothers not taking iron and vitamin supplements for 2 months postpartum was higher than in those taking the supplements(iron supplement:0.74 μg/L vs.0.00 μg/L,P = 0.025;vitamin supplement:0.78 μg/L vs.0.00 μg/L,P = 0.005).Breast milk Cd level at the second postpartum month was negatively correlated with the z scores of head circumference(r = 0.248,P = 0.042) and weight for age at birth(r = 0.241,P = 0.024) in girls.No correlation was found between the breast milk Pb/Cd levels and the EPDS scores.Conclusion Considering the high levels of Pb and Cd in breast milk in this study,breast milk monitoring programs are necessary.

Comparative and Empirical Study on Vegetable Input-Output Efficiency of Suburban and Rural Areas

On the basis of comparative analysis on the vegetable input-output efficiency of suburban and rural areas in 2011- 2012,this paper made co-integration test,impulse response and variance decomposition for the vegetable input-output relationship of suburban areas in 1998-2012. Comparative analysis indicated that the vegetable input-output benefit of suburban area declines,while that of rural area rises; empirical analysis indicated that there is a long-term stable relationship between labor cost of vegetable planting and vegetable income and between material cost of vegetable planting and vegetable income,but the vegetable income itself has certain lag effect,followed by material cost,and the labor cost has minimum influence. Finally,it came up with recommendations for improving suburban vegetable input-output relationship,including improving vegetable input security mechanism,improving farmers' quality and innovation ability,and increasing technological input.

Impacts of Suburbanization on Urban Eco-environment of Xi'an in China

Suburbanization in large cities is an important phenomenon in the process of urbanization development in China in recent decades,which plays a very important role in promoting city development,whereas some side effects on the eco-environment appeared at the same time.This paper,taking Xi'an City in China as a case study site,analyzed the features of population suburbanization and industry suburbanization and pointed out the impacts of suburbanization on urban eco-environment.Based on the research,suggestions of countermeasures for urban planning and municipal management of Xi'an City in protecting urban eco-environment and conserving natural ecology were put forward in the end.

Analysis of results related to the percent free prostate specific antigen among men without prostate diseases in Xi'an area

To measure the percent of free prostate specific antigen （fPSA） among men without prostate diseases in Xi＇an area, and to study the relationship of percent fPSA with age and pathological grade, clinical stage of prostate cancer （PCa） with percent fPSA, and to analyze the difference between the data in China and the.overseas data to determine appropriate reference range for Chinese male. Methods： A total of 713 participants were enrolled into the study, with PSA, fPSA in serum measured and the percent fPSA calculated. Out of 713 cases, 679 without prostate diseases were divided into 5 groups by age, and then the relationships of PSA, fPSA and percent fPSA with age were studied, respectively. The relationship of pathological grade and clinical stage with percent fPSA of the 34 participants with PCa was also studied. With the help of the related data of men without prostate disease, the appropriate reference range for Chinese male was established. Results： The increases in PSA or fPSA were correlated with age, while there was no significant correlation between age and percent fPSA. The percent fPSA was also correlated with pathological grade and clinical stage of PCa. The percent fPSA of men without prostate disease in Xi＇an area was significandy lower than that in the related overseas data. The reference range of percent fPSA for Chinese male was≥ 15%. Conclusion： Percent fPSA might be more useful than PSA in the detection of prostate cancer. As the percent fPSA is decreased, the pathological grade is decreased, and the clinical stage is increased, the malignant degree is increased. The reference range of ≥15% is more appropriate for Chinese male.

Path Selection of Xi＇an Free Trade Area Construction under the Strategy of Silk Road Economic Belt

From the present situation of worldwide flee-trade area and the new trend of reform and opening in China after 18 of the fifth plenary session, you can see that in domestic, the construction and development of free-trade area, taking regional core city as center, is economy transformation means under new normal economic environment, and new clues to improve the level of reform and opening. The establishments of free trade Area in Shanghai, Guangdong, Tianjin, Fujian provided references for establishing a free trade area of xi ＇ an under the background of the silk road economic belt construction. This article firstly analyzes the present domestic and foreign research situation and development trend; and then put forward the necessity of building Xi＇ an free trade area. Then discusses the Xi＇ an Silk Road economic belt free trade area construction strategy. Finally, in combination with the practical situation of Xi＇ an, it proposes path selection of Xi＇ an free trade area construction under the strategy of Silk Road economic belt.

Types, Distribution Characteristics, and Development Strategies of Rural Characteristic Industry in Xi’an Metropolitan Area

China’s urbanization development has entered the“second half”,which is at a critical stage of transition from the middle stages to the mature stage.The metropolitan area formed by the mega-city radiating the development of surrounding cities and counties is an important spatial carrier of urbanization.The rural characteristic industry is the main path to promote regional economic development and urban-rural integration in the metropolitan area.Exploring the development characteristics of rural characteristic industries in the metropolitan area has important theoretical and practical significance for promoting the effective connection between urban-rural integration and rural revitalization of the metropolitan area and improving the development quality of the metropolitan area.Take the Xi’an metropolitan area as an example and adopt kernel density analysis and other methods to reveal the spatial differentiation rules of rural characteristic industries.On this basis,the three-dimensional development strategy of“industry-spatial-institutional”for the development of the rural characteristic industry is proposed,to provide theoretical reference for the development of rural characteristic industry in metropolitan areas.

Equity of Accessibility to Health Care Services and Identification of Underserved Areas

Characterizing the availability of opportunities to residents has been a long-term aim in health care geographic investigation.It is important to measure the degree of inequity in health care accessibility and to identify underserved areas, due to the uneven distribution of health care services. In this study, JavaScript was used to calculate travel time based on Amap, as this can provide a more reliable data support to measure the health care accessibility in Xi’an communities, China. Based on the overall equity, herein, an attempt was made to quantify the equity of health care accessibility, and to identify health care underserved areas inside the different communities. Results show that the accessibility to low-level health care services is high in the northern areas and low in the southern areas, while the accessibility to high-level and comprehensive health care services shows a clear core-periphery spatial structure. Moreover, the overall equity of the health care accessibility is relatively low, and the inequity of high-level health care accessibility is further aggravated.Furthermore, the quantified equity of accessibility to high-level and comprehensive health care services in the central urban areas is better;however low-level health care services are relatively inadequate. There are significant differences among health care underserved areas, in particular, for the worst equity and the lowest accessibility areas(A1) and the worse equity and the lowest accessibility areas(B1) in high-level underserved areas. Notably, the sharing of health care services and the reasonable flow of health technical personnel among different levels of health institutions can make the high-level health care services in the central urban areas have a greater trickle effect on the surrounding areas.

Intestinal parasitic infections in suburban government schools,Lak Hok subdistrict,Muang Pathum Thani,Thailand

Objective:To provide baseline information of parasitic infections in 3 suburban government schools,Lakhok subdistrict of Muang Pathum Thani,Thailand.Methods:This study was conducted between May-June 2010 using simple direct smear and modified formalin ether and from a population of 1253 in 3 suburban government schools.Results:Total samples of 202registered and participated.The average of prevalence of infection from 3 schools was 13.9%,there were 13.7%,14.3%and 13.9%in N,S and R school,respectively with no significant difference between schools(P>0.05).The infection rates did not show significant difference between gender(P>0.05).The highest rate of infection was 20.4%in Pathom 2(8 years)students and the lowest was4%in Pathom 1(7 years)with statistically difference between age groups(P<0.05).The highest prevalence of pathogenic protozoa was Giardia lamblin(G.lamblia)which was found in 50%of infected cases,followed by 25%of Entamoeba Inictolytica(E.histolytica)and Blastocystis hominis(B.hominis).The highest prevalence of non-pathogenic protozoa was Endnhmat nano(E.nana)which was found in 88.9%,followed by 11.1%of Entamoeba coli(E.coli).Mixed infections between Blastocwstis hominis(B.hominis)and Endolimax nana(E.nana)were reported at 7.1%.The only helminthic infection found in this study area was hookworm,found in 1 student(3.8%).The formalin ether concentration technique showed a higher efficacy of detection(78%-100%)than the simple direct smear method(0%-50%).Conclusions:Surveillance of protozoan infections may need to be focused on suburban areas.

Residents’attitudes and behaviours on private green spaces in the suburban areas of Central European countries

Green spaces in urban and suburban areas play a significant role in helping settlements adapt to climate change.The design,quantity,quality,and location of green spaces influence their ability to provide benefits to people and enhance the quality of life.Private green spaces,if adequately managed,can enhance the environmental quality.This study,based on a questionnaire survey and the Motivation/Attitude-Driven Behaviour(MADB)model,investigated how the attitudes and behaviours of residents shape private green spaces in 12 settlements of the 4 city regions(Cluj region,Nitra region,Kecskemét region,and Györ region)in 3 Central European countries(Hungary,Slovakia,and Romania).The results showed that beautiful natural environment,abundance of green spaces,beautiful settlement and streetscape,and village atmosphere were mentioned most often,along with good quality of life,with a mention rate of over 70.00%in the four city regions.Convenience also played a significant role in the management of green spaces,showing that convenience factors(less work,less waste,and cheaper management)more important for those who live in settlements nearer to the cities.The importance of biodiversity and ecology was positively correlated with socio-economic status such as education and financial situation.However,the importance of the utility of green spaces was less prevalent among original villagers and settlers.Moreover,we found that the percentage of green spaces of settlers is slightly higher than that of original villagers.The results of factor analysis revealed that socio-economic status can influence respondents’attitudes towards green spaces.It suggests to increase ecological awareness of residents,especially for new settlers,and promote good management techniques for green spaces.This study can improve the awareness of urban planners about the importance of green spaces in suburban areas.

Urban Chemical Industrial Cluster Area Restructuring and Determinants: A Case Study of a Typical Old Chemical Industry Area Along the Yangtze River, China

China is in a transitional period between urban renewal and industrial change.In this period,the focus has been on the suburbanization of enterprises and land transformation in old industrial areas,particularly areas with chemical industries.A life cycle theoretical framework was established to develop chemical industrial zones in the context of urban expansion and land function conversion.The long-term historical processes and mechanisms that transformed a typical old chemical industry area along the Yangtze River,Yanziji Area of Nanjing City were unveiled and comparatively analyzed.The study found that the entire life cycle of the case study area was formed through the combined action of different influencing factors.Traditional industrial location factors played important roles during the rise and continuity of the chemical industry zone,while unconventional environmental regulations and government policies drove its decline and transformation.In the transformation of the old chemical zone,the renewal and redevelopment of industrial land into higher-value residential land is a key link determining the feasibility of government fund compensation and the circulation of capital.These findings demonstrate that regional control and environmental regulation play crucial roles in determining the location of polluting industries and the renewal of urban industrial areas.This research enhances the understanding of the development history and reconstruction of chemical industry clusters and plots within megacities at a finer geographic scale.

深入学习习近平“三农”工作论述精神

习近平“三农”工作论述是习近平新时代中国特色社会主义思想的重要部分,具有深刻的理论逻辑与实践理路。其核心在于以高度重视“三农”问题为出发点,向四个维度进行阐释分析:一是高度重视粮食安全;二是坚持农村基本经营制度;三是促进小农户与现代农业有机衔接;四是坚持城乡融合发展。习近平“三农”工作论述将农业现代化建设置于中国特色社会主义现代化进程,在顶层设计角度对农业、农村、农民的现实问题作出回应。认真理解与贯彻习近平“三农”工作论述,有助于理解新时代中国特色社会主义发展阶段,这对于把握新时代“三农”工作的脉搏具有重要意义。

西安地区台尔曼忍冬栽培管理技术

台尔曼忍冬是忍冬属一种具有优良观赏性状的杂交品种,缠绕木质藤本,具有生长迅速、枝繁叶茂、花色鲜艳、花期长和适应寒冷气候等优点,适宜在我国北方地区园林中栽植。国外培育至今100多年来,在世界各地广泛栽培,特别是欧美庭院中应用广泛,具有很高的观赏价值。该研究主要从形态特征、生态特性、繁殖技术及栽培管理等方面对台尔曼忍冬进行简要描述,为西安地区庭院栽培和园林推广应用提供参考依据。

习近平关于加快建设农业强国重要论述的出场逻辑、理论要旨与价值意蕴

习近平关于加快建设农业强国重要论述是新时代中国共产党“三农”战略思想的重要内容。就出场逻辑而言,习近平关于加快建设农业强国重要论述是马克思主义农业现代化思想与中国“三农”具体实际相结合的时代产物,是中国共产党领导农业强国建设百年探索经验的凝练和升华,是新发展阶段破解农业“规模不经济”难题、实现高质量发展的现实回应。就理论要旨而言,习近平关于加快建设农业强国重要论述科学回答了新征程上加快建设中国特色农业强国的战略定位、首要课题、根本出路和价值旨归等关键问题,在共性和个性、应然和实然的良性互动间立体地擘画出中国特色农业强国的理论和实践图景。就价值意蕴而言,习近平关于加快建设农业强国重要论述是对马克思主义农业现代化思想的拓展和创新,是立足“大国小农”国情、建设中国特色农业强国的实践指南,也为超越西方桎梏、探索世界农业现代化新模式贡献了中国智慧和中国方案。

超级中学垄断与城市内顶尖大学入学机会区域差异——基于北京市的实证研究

超级中学的发展壮大可能加剧城市内部顶尖大学入学机会的区域差异,不利于大型城市引导人口向郊区流动。基于对某顶尖大学A北京生源调查数据(2001—2021年)的分析发现,顶尖大学入学机会在北京市存在着明显的城郊差异,位于城区的超级中学与首位中学近年来分别垄断了A大学约40%与超过20%的生源;超级中学垄断降低了北京市一般高中学生的顶尖大学入学机会,但这种负面影响主要表现为对郊区一般高中学生顶尖大学入学可能性、顶尖大学生源密度及相对录取排名的冲击,城区一般高中所受影响并不明显。因此应该增加郊区优质教育资源投入,强化市级政府的资源统筹力度,同时也需要扩大优质高中的资源覆盖、加强郊区教师队伍建设、优化高中学校规划布局。

习近平特色农业发展理念的科学内涵与时代价值

习近平特色农业发展理念萌芽于其七年知青时的乡村农业生产实践,形成于地方从政时的区域农业发展探索,升华于治国理政时的大国农业体系构建。随着社会主要矛盾转变,习近平认为新时代特色农业发展应着力解决发展不平衡不充分问题,构建现代产业体系、绿色生产体系和新型经营体系,营造良好的农业发展环境。习近平特色农业发展理念继承和丰富了马克思主义农业理论,是引领“大国小农”高质高效发展特色农业的行动指南,是推进实现全体人民共同富裕的根本遵循,为世界提供了推进实现农村农民共同富裕的中国方案。

都市圈市域(郊)铁路创新发展策略研究

市域(郊)铁路是建设“轨道上的都市圈”、支撑都市圈高质量发展的重要抓手。目前,我国市域(郊)铁路建设已进入加速发展的机遇期。在此背景下,文章梳理总结国外都市圈市域(郊)铁路发展经验及特征,剖析我国都市圈市域(郊)铁路发展现状及问题,并从理念创新、机制创新、建设创新及运管创新4个方面提出都市圈市域(郊)铁路创新发展策略建议,以期为促进其高质量、可持续发展提供参考和借鉴。

文旅融合背景下城郊型乡村景观更新设计

围绕城郊型乡村提出文旅融合背景下景观更新策略,以南昌县城郊乡村为例提出挖掘在地文化、乡愁记忆、民风民俗等景观设计要素,总结可借鉴的设计策略。

“推动革命老区高质量发展”学术研讨会综述

2023年8月,中国井冈山干部学院与南昌大学联合举办“深入学习贯彻习近平新时代中国特色社会主义思想和党的二十大精神,推动革命老区高质量发展”学术研讨会。与会专家围绕党的十八大以来革命老区取得的历史性成就、发生的历史性变化,深刻阐述革命老区取得历史性成就、发生历史性变化的深层次原因在于习近平新时代中国特色社会主义思想的科学指引,并对革命老区高质量发展的路径进行了深入分析,提出了一系列具体可行的政策建议。

北京市郊铁路遗产京门-门大线“一线四矿”再生策略

京门铁路是詹天佑主持修建、与京张铁路同期完工的铁路支线之一。“一线四矿”(门大线及沿线王平、大台、木城涧和千军台四座煤矿)曾是京西“黑、白、灰”及首钢产业群的重要支撑。为了对京门-门大线进行遗产保护和活化利用,以遗产廊道理论及交通引导更新(TOR)理念为指导,围绕京门-门大铁路承接京西通勤与铁路文化旅游的新职能,通过沿线人地关系、产业分布、资源特色等现状调研,提出交通引领区域更新、文旅对接本土资源、设施更新轻资产重服务、塑造铁路旅游品牌四个方面的再生策略,以激活特色工业转型和京西乡村振兴。