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Urban-Rural Gap Widens
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《China Population Today》 2000年第Z2期14-15,共2页
关键词 HIGH urban-rural gap Widens
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An empirical research of urbanization and urban-rural gap in China:1952-2005
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作者 Ye Chao Cao Zhidong Chen Mingxing 《Ecological Economy》 2008年第4期403-409,共7页
There are two important problems of urban-rural relationship in China nowadays: the accelerated urbanization process and an enlarged urban-rural gap. The researchers can be divided into two schools according to their... There are two important problems of urban-rural relationship in China nowadays: the accelerated urbanization process and an enlarged urban-rural gap. The researchers can be divided into two schools according to their emphasis. One emphasizes particularly the urban development, and the other pays attention to the urban-rural income gap. However, there is a very strong association between urbanization rate and urban-rural inequality. As far as it goes, there is a paradox between urbanization and urban-rural inequality in China. This main reason lies' in the different temporal and spatial scales chosen by the scholars. Making use of correlative analysis and wavelet method, this paper rethinks and sums up the commonly evolving characteristics and trends between urbanization and urban-rural gap from 1950s to now. There is an intensively positive correlation between urbanization and urban- rural consumption gap. In general, with the acceleration of urbanization, urban-rural gap of China has undergone three stages of cyclical fluctuations. The rapid urbanization results in the increase of urban-rural highly risky. In addition, the special stage of urbanization is the other reason that expands urban-rural gap. 展开更多
关键词 URBANIZATION urban-rural relation urban-rural gap Correlative analysis Wavelet analysis
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Mapping and measuring urban-rural inequalities in accessibility to social infrastructures 被引量:1
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作者 Chenmeng Guo Weiqi Zhou +1 位作者 Chuanbao Jing Dawa Zhaxi 《Geography and Sustainability》 CSCD 2024年第1期41-51,共11页
Equal access to social infrastructures is a fundamental prerequisite for sustainable development,but has long been a great challenge worldwide.Previous studies have primarily focused on the accessibility to social inf... Equal access to social infrastructures is a fundamental prerequisite for sustainable development,but has long been a great challenge worldwide.Previous studies have primarily focused on the accessibility to social infras-tructures in urban areas across various scales,with less attention to rural areas,where inequality can be more severe.Particularly,few have investigated the disparities of accessibility to social infrastructures between urban and rural areas.Here,using the Changsha-Zhuzhou-Xiangtan urban agglomeration,China,as an example,we investigated the inequality of accessibility in both urban and rural areas,and further compared the urban-rural difference.Accessibility was measured by travel time of residents to infrastructures.We selected four types of social infrastructures including supermarkets,bus stops,primary schools,and health care,which were funda-mentally important to both urban and rural residents.We found large disparities in accessibility between urban and rural areas,ranging from 20 min to 2 h.Rural residents had to spend one to two more hours to bus stops than urban residents,and 20 min more to the other three types of infrastructures.Furthermore,accessibility to multiple infrastructures showed greater urban-rural differences.Rural residents in more than half of the towns had no access to any infrastructure within 15 min,while more than 60%of the urban residents could access to all infrastructures within 15 min.Our results revealed quantitative accessibility gap between urban and rural areas and underscored the necessity of social infrastructures planning to address such disparities. 展开更多
关键词 ACCESSIBILITY Social infrastructures urban-rural difference INEQUALITY Regional sustainability
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Influence of Transportation Accessibility on Urban-rural Income Disparity and Its Spatial Heterogeneity
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作者 HUANG Xiaoyan KANG Chenchen +1 位作者 YIN Chun TANG Junqing 《Chinese Geographical Science》 SCIE CSCD 2024年第3期453-467,共15页
Transportation accessibility has been treated as an important means of reducing the urban-rural income disparity.However,only a few studies have examined the effects of different types of transportation accessibility ... Transportation accessibility has been treated as an important means of reducing the urban-rural income disparity.However,only a few studies have examined the effects of different types of transportation accessibility on urban-rural income disparity and their spatial heterogeneity.Based on data from 285 prefecture-level(and above)Chinese cities in 2000,2005,2010,2015,and 2020,this study uses spatial econometric models to examine how highway accessibility and railway accessibility influence the urban-rural income disparity and to identify their spatial heterogeneity.The result reveals that highway accessibility and railway accessibility have‘coreperiphery’ring-like circle structures.The urban-rural income disparity exhibits strong spatial clustering effects.Both highway accessibility and railway accessibility are negatively associated with urban-rural income disparity,and the former having a greater effect size.Moreover,there is a substitution effect between highway accessibility and railway accessibility in the whole sample.Furthermore,these associations differ in geographic regions.In the central region,highway accessibility is more important in reducing the urban-rural income disparity,but its effect is weakened with the increase of railway accessibility.In the western region,railway accessibility has a larger effect on narrowing the urban-rural income disparity,and this effect is strengthened by the increase of highway accessibility.We conclude that improving transportation accessibility is conducive to reducing the urban-rural income disparity but its effect is spatial heterogenetic.Highways and railways should be developed in a coordinated manner to promote an integrated transport network system. 展开更多
关键词 transport accessibility income gap regional divergence spatial heterogeneity urban and rural areas China
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Spatial Distribution Pattern and Influencing Factors of Bed-and-breakfasts(B&Bs)from the Perspective of Urban-rural Differences:A Case Study of Jiaodong Peninsula,China
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作者 WANG Xinyue MA Qian 《Chinese Geographical Science》 SCIE CSCD 2024年第4期752-763,共12页
There are significant differences between urban and rural bed-and-breakfasts(B&Bs)in terms of customer positioning,economic strength and spatial carrier.Accurately identifying the differences in spatial characteri... There are significant differences between urban and rural bed-and-breakfasts(B&Bs)in terms of customer positioning,economic strength and spatial carrier.Accurately identifying the differences in spatial characteristics and influencing factors of each type,is essential for creating urban and rural B&B agglomeration areas.This study used density-based spatial clustering of applications with noise(DBSCAN)and the multi-scale geographically weighted regression(MGWR)model to explore similarities and differences in the spatial distribution patterns and influencing factors for urban and rural B&Bs on the Jiaodong Peninsula of China from 2010 to 2022.The results showed that:1)both urban and rural B&Bs in Jiaodong Peninsula went through three stages:a slow start from 2010 to 2015,rapid development from 2015 to 2019,and hindered development from 2019 to 2022.However,urban B&Bs demonstrated a higher development speed and agglomeration intensity,leading to an increasingly evident trend of uneven development between the two sectors.2)The clustering scale of both urban and rural B&Bs continued to expand in terms of quantity and volume.Urban B&B clusters characterized by a limited number,but a higher likelihood of transitioning from low-level to high-level clusters.While the number of rural B&B clusters steadily increased over time,their clustering scale was comparatively lower than that of urban B&Bs,and they lacked the presence of high-level clustering.3)In terms of development direction,urban B&B clusters exhibited a relatively stable pattern and evolved into high-level clustering centers within the main urban areas.Conversely,rural B&Bs exhibited a more pronounced spatial diffusion effect,with clusters showing a trend of multi-center development along the coastline.4)Transport emerged as a common influencing factor for both urban and rural B&Bs,with the density of road network having the strongest explanatory power for their spatial distribution.In terms of differences,population agglomeration had a positive impact on the distribution of urban B&Bs and a negative effect on the distribution of rural B&Bs.Rural B&Bs clustering was more influenced by tourism resources compared with urban B&Bs,but increasing tourist stay duration remains an urgent issue to be addressed.The findings of this study could provide a more precise basis for government planning and management of urban and rural B&B agglomeration areas. 展开更多
关键词 urban-rural bed-and-breakfasts(B&Bs) spatiotemporal evolution density-based spatial clustering of applications with noise(DBSCAN)model multi-scale geographically weighted regression(MGWR) Jiaodong Peninsula China
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Development of Sustainable Urban-Rural Integration:Dongtan Case Study
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作者 Ningbin Ji 《Journal of Architectural Research and Development》 2024年第5期41-65,共25页
The environmental impact issues,such as global warming and expansion of the urban zone,seem more serious and have become the biggest defining challenges of the 21st century.Climate change can lead to water shortages,d... The environmental impact issues,such as global warming and expansion of the urban zone,seem more serious and have become the biggest defining challenges of the 21st century.Climate change can lead to water shortages,desertification,land degradation,air pollution,rising sea levels,accelerated deforestation,and exacerbated economic pressures.Global urban growth greatly impacts changes in sociability,humanity,and the environment of the Earth.The human presence,especially in cities,seriously affects resource use and waste disposal,and they are consuming natural resources faster than the planet can sustain during urbanization,changing how people live.China,with a population of 1.3 billion,has seen tens of millions of people living in the countryside migrate to cities,especially megacities,since the 1980s.As a result of its decision to industrialize and urbanize to boost the economy,China has become the world’s second-largest consumer of energy.In recent years,China’s government has quickly recognized the lessons of“limits to growth”and has taken action by initiating the construction process in Dongtan,Shanghai,China.They are making efforts to build urban-rural integration communities to promote sustainable development.Based on a literature review focusing on Dongtan,research questions are raised according to the research objective:(1)What are the challenges of sustainable development in urban-rural integration?(2)What practices has Dongtan implemented for sustainable development,or how is sustainable development being applied to Dongtan?(3)What are the social,political,environmental,and economic concerns regarding the sustainable development of Dongtan?The sustainable urban-rural integration concerns the ecological,economic,environmental,and psychological aspects of urban-rural integration design and management.The overall objective is to promote sustainable development in economic,social,ecological,and spatial dimensions.It will be a liveable,complete community that makes economic,environmental,and social sense locally while also contributing to national and global sustainable development.It will serve as a compelling model for how to build sustainable urban-rural integration worldwide. 展开更多
关键词 Environmental impact URBANIZATION Sustainable urban-rural integration Sustainable development Dongtan
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氢氟酸处理InP/GaP/ZnS量子点的光学性能及其发光二极管应用
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作者 陈晓丽 陈佩丽 +3 位作者 卢思 朱艳青 徐雪青 苏秋成 《发光学报》 EI CAS CSCD 北大核心 2024年第1期69-77,共9页
采用氢氟酸(HF)原位注入法制备了InP/GaP/ZnS量子点。通过紫外/可见/近红外光谱、光致发光光谱、透射电镜、球差校正透射电镜、X射线衍射、X射线光电子能谱等测试手段分析了HF对InP量子点的发光性能影响。实验结果表明,HF刻蚀减少了量... 采用氢氟酸(HF)原位注入法制备了InP/GaP/ZnS量子点。通过紫外/可见/近红外光谱、光致发光光谱、透射电镜、球差校正透射电镜、X射线衍射、X射线光电子能谱等测试手段分析了HF对InP量子点的发光性能影响。实验结果表明,HF刻蚀减少了量子点表面氧化缺陷状态,有效控制了InP核表面的氧化,并且原子配体形式的F-钝化了量子点表面的悬挂键,显著提升了量子点的光学性能。HF处理的InP/GaP/ZnS量子点具有最佳的发光性能,PLQY高达96%。此外,用HF处理InP/GaP/ZnS量子点制备的发光二极管,其发光的电流效率为6.63 cd/A,最佳外量子效率(EQE)为3.83%。 展开更多
关键词 HF InP/gap/ZnS量子点 光学性能 发光二极管
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道地药材云木香GAP研究与规范化种植基地建设实践与展望
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作者 杨丽云 陈翠 +4 位作者 康平德 戚淑威 程远辉 徐天才 杨少华 《安徽农业科学》 CAS 2024年第19期11-15,共5页
云木香原产印度,20世纪30年代初在云南丽江引进种植,并逐渐推广扩展至全省多地,1959年首次出口,誉为“云木香”,为云南省重要道地药材之一,药用历史悠久。为规范云南道地药材云木香的栽培措施,以保证其产品质量,参照国家药品监督管理局... 云木香原产印度,20世纪30年代初在云南丽江引进种植,并逐渐推广扩展至全省多地,1959年首次出口,誉为“云木香”,为云南省重要道地药材之一,药用历史悠久。为规范云南道地药材云木香的栽培措施,以保证其产品质量,参照国家药品监督管理局颁布实施的《中药材生产质量管理规范》相关要求,综述云木香的道地沿革与种植历史、规范化种植技术研究、传统初加工方法的继承与创新、标准化生产质量管理体系的建立以及规范化种植试验示范基地建设5个方面的研究,以期为云南西北高寒山区该道地药材品种产业化生产提供科学依据。 展开更多
关键词 云木香 道地药材 gap研究 质量 可追溯
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基于5GAP模型的高校食堂服务质量差距分析与对策探讨 被引量:1
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作者 陈森 《中国食品工业》 2024年第8期62-64,58,共4页
食堂服务是高校后勤服务体系中最重要的环节之一,高校食堂管理必须要有的放矢地改进工作。5GAP模型是一种直接有效的服务环节分析工具,更注重找出内部的服务缺陷。在以往的高校食堂研究中,多以顾客满意度的外部视角分析服务质量问题,本... 食堂服务是高校后勤服务体系中最重要的环节之一,高校食堂管理必须要有的放矢地改进工作。5GAP模型是一种直接有效的服务环节分析工具,更注重找出内部的服务缺陷。在以往的高校食堂研究中,多以顾客满意度的外部视角分析服务质量问题,本文通过5GAP模型以内部视角分析发现引发高校食堂服务质量问题的根源,以期能对高校食堂服务质量的改进和提升起到一定作用。 展开更多
关键词 服务质量 5gap模型 高校食堂
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青年职场“Gap day”现象探究
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作者 张良驯 付成梅 《中国青年社会科学》 CSSCI 北大核心 2024年第4期11-22,共12页
青年职场“Gap day”现象引起了社会的广泛关注和热烈讨论。青年职场“Gap day”现象的典型特征是:通过语言上的拼贴与再造,表达部分职业青年的困顿疲倦情绪;通过行为上的放空与逃离,排解青年在工作中积攒的情绪和压力;通过价值上的戏... 青年职场“Gap day”现象引起了社会的广泛关注和热烈讨论。青年职场“Gap day”现象的典型特征是:通过语言上的拼贴与再造,表达部分职业青年的困顿疲倦情绪;通过行为上的放空与逃离,排解青年在工作中积攒的情绪和压力;通过价值上的戏谑与自嘲,赋予青年的短暂休息以正向意义。青年职场“Gap day”现象的深层原因是:青年在高压生存环境中的“弹性姿态”、在加速社会运行中的“精神逃离”和在社会时钟齿轮下的“自我审视”。对青年职场“Gap day”现象的有效治理,既要着眼于青年发展,运用公共政策实现青年发展的普遍性诉求,又要立足于青年就业,采取切实措施促进青年实现高质量充分就业。 展开更多
关键词 gap day 青年现象 青年就业 青年职业发展
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A Research on the Threshold Effect of Credit Rationingupon the Urban-rural Income Gap in Rural Areas
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作者 郑平 刘艳华 《石家庄经济学院学报》 2016年第3期68-77,共10页
在剖析了信贷配给与城乡收入差距之间作用机制的基础上,论文构建了信贷配给与城乡收入差距的面板门槛模型,选取3 1 个省市1987年- 201 3年的省级面板数据,运用面板门槛模型估计方法,实证分析信贷配给对城乡收入差距的影响,并且从区域层... 在剖析了信贷配给与城乡收入差距之间作用机制的基础上,论文构建了信贷配给与城乡收入差距的面板门槛模型,选取3 1 个省市1987年- 201 3年的省级面板数据,运用面板门槛模型估计方法,实证分析信贷配给对城乡收入差距的影响,并且从区域层面进行了比较分析.结果显示:降低信贷配给程度有助于缓解城乡收入差距,而从东部、中部、西部三大区域的实证结果来看,各地区的信贷配给程度的提升对城乡收入差距的扩大有不同程度的影响.最后根据研究结果,提出降低各地区农业信贷配给程度的措施,从而达到缩小城乡收入差距的目的. 展开更多
关键词 信贷配给 城乡收入差距 面板门槛
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Spatial pattern of urban-rural integration in China and the impact of geography 被引量:2
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作者 Wei Pan Jing Wang +2 位作者 Yurui Li Shuting Chen Zhi Lu 《Geography and Sustainability》 CSCD 2023年第4期404-413,共10页
Urban-rural integration (URI) is a global challenge that is highly related to inequalities, poverty, economic growth, and other Sustainable Development Goals (SDGs). Existing research has evaluated the extent of URI a... Urban-rural integration (URI) is a global challenge that is highly related to inequalities, poverty, economic growth, and other Sustainable Development Goals (SDGs). Existing research has evaluated the extent of URI and explored its influencing factors, but urban-rural linkages are seldom incorporated in evaluation systems, and geographical factors are rarely recognized as the influencing factors. We construct a URI framework including regional economy, rural development, urban-rural linkage, and urban-rural gap. Based on a dataset consisting of 1,669 counties in China in 2020, we reveal the spatial pattern of URI and find a high correlation between the spatial pattern of URI and the relief degree of land surface (RDLS). Using structural equation modeling, we discover that topography has direct ( − 0.18, p < 0.001) and indirect ( − 0.17, p < 0.001) effects on URI. The indirect negative effects are mediated through the infrastructure, and the combination of localized advantages and modern technical conditions could mitigate the negative impact of topography. Finally, we identify 742 counties as lagging regions in URI, which can be clustered into eight types. Our findings could facilitate policy designing for those countries striving for integrated and sustainable development of urban and rural areas. 展开更多
关键词 urban-rural integration Relief degree of land surface INFRASTRUCTURE Structural equation modelling Sustainable urban and rural development PATTERNS Sustainable Development Goals
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Preliminary Study on Effects of the Model of Community-supported Agriculture(CSA) on Urban-rural Income Gap in China
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作者 彭雅琴 扈立家 《Agricultural Science & Technology》 CAS 2015年第2期404-406,410,共4页
The urban-rural income gap is widening,which has become a bottleneck restricting China's economic and social development.It is the current outstanding problems in the harmonious development of the society.Community S... The urban-rural income gap is widening,which has become a bottleneck restricting China's economic and social development.It is the current outstanding problems in the harmonious development of the society.Community Supported Agriculture(CSA) is one of the most important forms of sustainable agriculture and it has received the attention in recent years.This paper first introduces the rise and development of CSA in China,and discuss the impact of CSA on urban-rural income gap in China preliminarily in order to provide ideas for improving the farmers' income and narrowing the income gap between urban and rural areas. 展开更多
关键词 Community Supported Agriculture(CSA) The urban-rural income gap The income of the farmers
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The Approaches to Narrowing Urban-Rural Income Gap——From the Perspective of Rural Social Security 被引量:3
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作者 ZHENG Shuang-sheng 《Asian Agricultural Research》 2010年第6期37-40,45,共5页
From the situations about the incomes and life quality of the urban and rural residents,the thesis briefly introduces the status quo of the urban-rural income gap and explores the impact of the income gap on social ec... From the situations about the incomes and life quality of the urban and rural residents,the thesis briefly introduces the status quo of the urban-rural income gap and explores the impact of the income gap on social economy:firstly,it hampers economic development;secondly,it is detrimental to the social development.Then the thesis analyzes the role of a sound social security in narrowing urban-rural income gap:at first,it broadens the institutional environment of improving the agricultural efficiency;secondly,it eliminates the uncertainties influencing the farmers' income;thirdly,it improves the farmers' capacity to increase income;at last,it enhances the farmers' consciousness of wealth.Next the thesis inquires into the problems existing in the system of rural social security:the first problem is more obviously fragmented system;the second is inadequate security projects and narrower coverage;the third is an obvious lack of equality in urban and rural security;the fourth is even less sound management system;the last is the lagging of legislation.Afterwards the thesis proposes the countermeasures and suggestions to improve the system of rural social security and narrow urban-rural income gap:firstly,to integrate the social security system in rural areas;secondly,to perfect security projects and enhance the security system;thirdly,to integrate the administrative management of social security;at last,to enforce the legal system. 展开更多
关键词 Income distribution urban-rural income gap Rural social security Urban and rural residents China
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共混GAP基含能热塑性弹性体的氢键行为与力学性能
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作者 郑梦泽 张宁 +4 位作者 刘双 靳鹏 张锡铭 刘文皓 罗运军 《火炸药学报》 EI CAS CSCD 北大核心 2024年第4期365-371,共7页
为了改善GAP热塑性弹性体的力学性能,采用了DSC、低场核磁测试、静态力学测试和动态力学测试的方法对两种异氰酸酯固化的弹性体共混体系的氢键行为和力学性能进行分析,建立微观结构与宏观性能的关系。结果表明,由于分子结构原因,HMDI固... 为了改善GAP热塑性弹性体的力学性能,采用了DSC、低场核磁测试、静态力学测试和动态力学测试的方法对两种异氰酸酯固化的弹性体共混体系的氢键行为和力学性能进行分析,建立微观结构与宏观性能的关系。结果表明,由于分子结构原因,HMDI固化的GAP热塑性弹性体和IPDI固化的弹性体显示出不同的氢键行为和力学性能,通过物理共混得到了兼具抗拉强度及断裂延伸率的弹性体,50℃下抗拉强度高于1.5MPa,-40℃下延伸率不低于300%,相较于纯HMDI固化的弹性体,低温延伸率提升了约150%,IPDI固化的弹性体高温抗拉强度提升了约1.4MPa,说明通过共混可得到性能更为均衡的含能热塑性弹性体。 展开更多
关键词 材料力学 聚叠氮缩水甘油醚 gap 热塑性弹性体 氢键行为 高分子物理共混 高低温力学性能
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Granger Causality Test of Urban-rural Income Gap and Employment of Rural Labor Forces——A Case Study of Shouguang City 被引量:2
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作者 LU Gui-xing Weifang University, Weifang 261061, China 《Asian Agricultural Research》 2012年第1期36-39,70,共5页
Taking Shouguang City in Shandong Province as an example, this article researches the mutual relationship between urban-rural income and employment of rural labor forces, and conducting cointegration test and Granger ... Taking Shouguang City in Shandong Province as an example, this article researches the mutual relationship between urban-rural income and employment of rural labor forces, and conducting cointegration test and Granger causality test on the variable sequences using statistical data. The results show that the average annual income of rural labor forces influences the income per capita of rural residents, and there is a Granger causality relationship between the income per capita of rural residents and urban employees' average wage. Engaging in production concerning agriculture, forestry, animal husbandry and fishery makes the total income per capita in rural areas of Shouguang City higher than the average wage of urban residents in Shouguang City, even in Weifang City. The comparative advantage in terms of income causes the city to loose attraction to rural residents in Shouguang City. The comparative advantage drives more rural labor forces in Shouguang City to engage in primary industry, thereby greatly reducing the pressure of employment and transfer of rural labor forces. Finally important following measures are put forward to promote employment and on-the-spot transfer of rural labor forces: vigorously propel agricultural industrialization; increase rural residents' income; improve the living conditions for rural residents. 展开更多
关键词 urban-rural INCOME gap RURAL LABOR FORCES GRANGER
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Comparative Research on Prediction Model of China's Urban-rural Residents' Income Gap 被引量:2
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作者 TU Xiong-ling School of Finance and Statistics,Jiangxi University of Finance and Economics,Nanchang 330013,China 《Asian Agricultural Research》 2011年第5期88-91,95,共5页
By using the data concerning China's urban-rural residents' income gap from 1978 to 2010,this paper mainly researches the application of several kinds of models in predicting China's urban-rural residents&... By using the data concerning China's urban-rural residents' income gap from 1978 to 2010,this paper mainly researches the application of several kinds of models in predicting China's urban-rural residents' income gap.By conducting empirical analysis,we establish ARIMA prediction model,grey prediction model and quadratic-polynomial prediction model and conduct accuracy comparison.The results show that quadratic-polynomial prediction model has excellent fitting effect.By using quadratic-polynomial prediction model,this paper conducts prediction on trend of China's urban-rural residents' income gap from 2011 to 2013,and the prediction value of income gap of urban-rural residents in China from 2011 to 2013 is 14 173.20,15 212.92 and 16 289.67 yuan respectively.Finally,on the basis of analysis,corresponding countermeasures are put forward,in order to provide scientific basis for energy planning and policy formulation:first,strengthen government's function of public service,coordinate resources,and strive to provide an equal opportunity of development for social members,so as to promote people's welfare and promote social equality;second,breach industrial monopoly and bridge income gap between employees in monopoly industry and general industry;last but not the least,support,encourage and call for government to establish social relief fund,adjust residents' income distribution from the non-governmental perspective,and endeavor to promote the income level of low-income class. 展开更多
关键词 urban-rural residents’ INCOME gap ARIMA model GREY
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基于Roussouly分型的脊柱形态和GAP评分对成人脊柱畸形术后临床疗效的影响
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作者 李嘉鑫 陈振 +3 位作者 杨万忠 范嘉旺 郑任春 戈朝晖 《宁夏医科大学学报》 2024年第5期507-514,共8页
目的评估成人脊柱畸形(ASD)手术前后的Roussouly矢状面脊柱形态及全脊柱序列比例(GAP)评分对术后临床疗效的影响。方法回顾性分析2016年1月至2021年12月在宁夏医科大学总医院行手术治疗的72例ASD患者临床资料,其中男性20例,女性52例,年... 目的评估成人脊柱畸形(ASD)手术前后的Roussouly矢状面脊柱形态及全脊柱序列比例(GAP)评分对术后临床疗效的影响。方法回顾性分析2016年1月至2021年12月在宁夏医科大学总医院行手术治疗的72例ASD患者临床资料,其中男性20例,女性52例,年龄(46.9±19.0)岁。将纳入患者按照“当前”[依据骶骨倾斜角(SS)]和“理论”[依据骨盆入射角(PI)]Roussouly分型脊柱形态进行划分。根据一个恒定参数(PI)判断出患者“理论”形态,然后将此种类型的理想形态参数与实际参数作对比,若术后3个月患者的“当前”Roussouly脊柱形态与其“理论”Roussouly脊柱形态各项参数均符合则归入匹配组,否则归入非匹配组。根据相关参数计算两组患者手术前后GAP评分,并收集术前、术后3个月和末次随访时的疼痛视觉模拟评分(VAS)、Oswestry功能障碍指数(ODI)及术前和末次随访时SRS-22评分(包括总分、疼痛、功能、自我形象、心理健康和治疗满意度),同时记录患者随访时机械并发症发生情况。比较两组患者的影像学参数、GAP评分、临床疗效评分及机械并发症中的差异。结果72例ASD患者术前以RoussoulyⅠ型和Ⅱ型脊柱形态为主,术后以RoussoulyⅡ型和Ⅲ型为主。所有患者术后影像学参数和临床疗效评分较术前均得到改善(P均<0.05)。组间比较,非匹配组末次随访骨盆倾斜角和躯干整体倾斜角大于匹配组(P均<0.05),术后3个月及末次随访,匹配组GAP评分均低于非匹配组(P均<0.05),匹配组较非匹配组在术后3个月和末次随访有更好的VAS评分、ODI评分及SRS-22评分(包括总分、疼痛、功能和治疗满意度)(P均<0.05)。匹配组术后机械并发症发生率更低(P<0.05),腰椎前凸顶点位于理想位置可降低机械并发症发生率。结论ASD术后脊柱矢状面匹配理想Roussouly分型的患者临床疗效和GAP评分更好、机械并发症发生率更低,PI术中应尽可能矫正至理想Roussouly分型脊柱形态。 展开更多
关键词 成人脊柱畸形 Roussouly分型 gap评分 临床疗效 机械并发症
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基于GIS的漳州市松岭村乡村旅游适宜性评价及GAP分析
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作者 康丽婷 罗紫薇 +2 位作者 胡希军 韦宝婧 周冬梅 《生态科学》 CSCD 北大核心 2024年第2期123-131,共9页
以“全国乡村旅游扶贫重点村”漳州市松岭村为研究对象,借助地理信息系统(GIS),从资源禀赋潜力出发,构建乡村旅游适宜性评价体系,利用地理探测器计算各旅游适宜性影响因子的权重,基于乡村旅游适宜性评价结果对旅游空间进行开发空缺(GAP... 以“全国乡村旅游扶贫重点村”漳州市松岭村为研究对象,借助地理信息系统(GIS),从资源禀赋潜力出发,构建乡村旅游适宜性评价体系,利用地理探测器计算各旅游适宜性影响因子的权重,基于乡村旅游适宜性评价结果对旅游空间进行开发空缺(GAP)分析,并提出旅游规划优化策略。旨在优化景观资源在空间整体布局中的合理利用,为乡村旅游规划提供新思路。研究结果表明:(1)松岭村旅游适宜性受基础设施因子影响最大,受坡向因子影响最小;(2)松岭村旅游适宜等级可分为高适宜、较高适宜、中适宜、较低适宜、低适宜区5类,其中高适宜区面积最小,仅占松岭村总面积的4.64%,低适宜区面积最大,占总面积的58.00%;(3)借鉴GAP分析思路,识别松岭村景观资源点开发潜力分级区块,各适宜等级区均存在较多景观资源点未开发。建议结合现有特色景观资源点,优先开发较高及高潜力区块、积极开发中潜力区、适度开发较低及低潜力区,以期在保留旅游资源特色的同时最大化利用其景观资源。 展开更多
关键词 旅游适宜性评价 地理探测器 gap分析 乡村旅游 松岭村
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LiF/GAP协同作用改善硼粉的燃烧性能
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作者 伍双艳 王吉权 +4 位作者 邵建 刘俊 陈九玉 朱宝忠 孙运兰 《火炸药学报》 EI CAS CSCD 北大核心 2024年第3期279-286,I0006,共9页
以氟化锂/缩水甘油叠氮化物聚合物(LiF/GAP)为界面层对微米硼进行改性,研究LiF/GAP协同作用对硼粉热行为、燃烧性能和凝聚相燃烧产物的影响。结果表明,通过硅烷偶联剂处理后,硼粉表面黏结性得以提高,LiF能够较好地包覆在硼粉表面;GAP在... 以氟化锂/缩水甘油叠氮化物聚合物(LiF/GAP)为界面层对微米硼进行改性,研究LiF/GAP协同作用对硼粉热行为、燃烧性能和凝聚相燃烧产物的影响。结果表明,通过硅烷偶联剂处理后,硼粉表面黏结性得以提高,LiF能够较好地包覆在硼粉表面;GAP在400℃之前抑制了LiF与硼表面氧化膜的反应,使LiF的除膜效应延后至硼粉氧化增重阶段,从而将更多的活性硼暴露在空气中发生氧化,促进了硼粉的燃烧;LiF和GAP协同作用显著改善了硼粉的燃烧性能,尤其当LiF和GAP质量分数均为10%时,作用效果最为明显。此外,LiF和GAP协同作用有效抑制了燃烧过程中硼粉团聚,使其凝聚相燃烧产物粒径降低。 展开更多
关键词 物理化学 硼颗粒 LiF/gap协同作用 燃烧特性 团聚抑制 燃烧机理
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