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31篇 您的检索式:作者名="Wenhui Kuang"
    题名 作者 年代 出处 被引量
1Spatial patterns and driving forces of land use change in China during the early 21st century显示文摘Land use and land cover change as the core of coupled human-environment systems has become a potential field of land change science (LCS) in the study of global environmental change. Based on remotely sensed data of land use change with a spatial resolution of 1 km × 1 km on national scale among every 5 years, this paper designed a new dynamic regionalization according to the comprehensive characteristics of land use change including regional differentiation, physical, economic, and macro-policy factors as well. Spatial pattern of land use change and its driving forces were investigated in China in the early 21st century. To sum up, land use change pattern of this period was characterized by rapid changes in the whole country. Over the agricultural zones, e.g., Huang-Huai-Hai Plain, the southeast coastal areas and Sichuan Basin, a great proportion of fine arable land were engrossed owing to considerable expansion of the built-up and residential areas, resulting in decrease of paddy land area in southern China. The development of oasis agriculture in Northwest China and the reclamation in Northeast China led to a slight increase in arable land area in northern China. Due to the 'Grain for Green' policy, forest area was significantly increased in the middle and western developing regions, where the vegetation coverage was substantially enlarged, likewise. This paper argued the main driving forces as the implementation of the strategy on land use and regional development, such as policies of 'Western Development', 'Revitalization of Northeast', coupled with rapidly economic development during this period.LIU Jiyuan ZHANG Zengxiang XU Xinliang KUANG Wenhui ZHOU Wancun ZHANG Shuwen LI Rendong YAN Changzhen YU Dongsheng WU Shixin JIANG Nan 2010Journal of Geographical Sciences2010,20,4:154
2Spatiotemporal characteristics, patterns, and causes of land-use changes in China since the late 1980s显示文摘Land-use/land-cover 变化(LUCC ) 有连接到人和自然相互作用。瓷器 Land-Use/cover 数据集(CLUD ) 从 1980 年代末在 5 年的间隔定期被更新到 2010,与基于 Landsat TMETM+ 图象的标准过程。陆地使用动态区域化方法被建议分析主要陆地使用变换。在国家规模的陆地使用变化的空间与时间的特征,差别,和原因然后被检验。主要调查结果如下被总结。越过中国的陆地使用变化(LUC ) 在最后 20 年(19902010 ) 里在空间、时间的特征显示了一个重要变化。农田变化的区域在南方减少了并且在北方,而是仍然是的全部的区域增加了几乎未改变。回收农田从东北被转移到西北。布满建筑物陆地很快膨胀了,主要在东方被散布,并且逐渐地展开到中央、西方的中国。树林首先减少了,然后增加但是荒芜的区域是反面。草地继续减少。在中国的 LUC 的不同空间模式被发现在之间迟了第 20 世纪并且早第 21 世纪。原版 13 个 LUC 地区在一些地区被边界的变化由 15 个单位代替。包括的这些变化(1 ) 的主要空间特征加速的扩大布满建筑物在 Huang-Huai-Hai 区域,东南的沿海的区域,长江的中流区域,和四川盆登陆;(2 ) 从东北中国和东方内部蒙古在北方转移了陆地开垦到绿洲在西北中国的农业区域;(3 ) 从在到稻的东北中国的喂雨的农田的连续转变回答;并且(4 ) 为在内部蒙古,黄土高原,和西南的多山的区域的南部的农业牧剧的交错群落的格林工程的谷物的有效性。在最后二十年,尽管在北方的气候变化在农田影响了变化,政策规定和经济驱动力仍然是越过中国的 LUC 的主要原因。在第 21 世纪的第一十年期间,在陆地使用模式驾驶了变化的人为的因素从单程的陆地开发转移了强调到开发和保存。动态区域化方法被用来在单位的 zoning 边界,地区的内部特征,和生长和减少的空间模式分析变化。结果揭示了变化过程的模式,也就是 LUC 的过程和在在不同阶段的特征的地区性的差别。地区的生长和减少在这动态 LUC zoning,在统一边界的变化,和在前者和后者十年之间的变化紧张的特征期间被检验。在为在不同类型和陆地使用的不同区域的变化的陆地使用和原因的模式和过程之间的其他的转变的模式被探索。LIU Jiyuan KUANG Wenhui ZHANG Zengxiang XU Xinliang QIN Yuanwei NING Jia ZHOU Wancun ZHANG Shuwen LI Rendong YAN Changzhe WU Shixin SHI Xuezheng JIANG Nan YU Dongsheng PAN Xianzhang CHI Wenfeng 2014Journal of Geographical Sciences2014,24,2:245
3Spatiotemporal dynamics of impervious surface areas across China during the early 21st century显示文摘China has experienced an unprecedented urbanization and industrialization in the past decades. In this research, we examined the dynamics of construction lands and impervious surface areas (ISA) based on land use/cover change and ISA datasets between 2000 and 2008, which were provided by the national resources and environmental remote sensing information platform. The results indicated that the construction areas and ISA increased by 3468.30 and 2212.24 km 2 /a in this period primarily due to the implementation of national macro-development strategies and fast-growing economy. In 2008, ISA accounted for 0.86% of the total land area in China. Urban land areas increased by 43.46% between 2000 and 2008. The annual growth rate of 1788.22 km 2 /a in this period was 2.18 times that in the 1990s. In particular, urban ISA increased by 53.30% between 2000 and 2008 with an annual growth rate of 1348.85 km 2 /a. During the 8 years, the ISA in China increased rapidly, especially in the Beijing-Tianjin-Tangshan Metropolitan Region, Pearl River Delta, Yangtze River Delta, and the western China region. The increasing ISA may influence potentially water environmental quality in the major basins. In particular, the number of subbasins having ISA of greater than 10% increased considerably, which were primarily distributed in the Haihe River, Yangtze River and Pearl River basins. In 2008, 14.42% of the basin areas were affected by the increased ISA.KUANG WenHui LIU JiYuan ZHANG ZengXiang LU DengSheng XIANG Bao 2013Chinese Science Bulletin2013,58,14:59
4Disturbance impacts of land use change on biodiversity conservation priority areas across China: 1990-2010显示文摘Land use change is one of the main drivers of biodiversity loss. In the last 20 years, China's land use pattern has undergone profound changes. This study constructs an Ecosystem Comprehensive Anthropogenic Disturbance Index(ECADI) to assess disturbance impacts of land use change between 1990 and 2010 on biodiversity conservation priority areas at national and regional scales. Four levels of biodiversity conservation areas were categorized: generally important areas, moderately important areas, important areas, and very important areas. The results indicated a higher ECADI value in 2010 in Central and Eastern China than in Western China, and the values of the moderately important, important and very important regions were lower than the average value of the whole country at all levels. Notably, in recent 20 years, the change extent of ECADI values in Central and Eastern China were much greater compared with that in Western China, and ECADI values in the moderately important, important and very important biodiversity conservation areas all showed increasing trends, with the increasing extent lower than that of whole China at all levels. Due to human activities such as urbanization in Eastern China and cropland reclamation in Northeast China and Xinjiang, ECADI values showed a medium increase trend(the change rate was about 1%–5% in 10 years), which indicated the need for more conservation efforts in those regions. However, ECADI values in the Loess Plateau presented a low decline trend(the change rate was about –1% to –0.1% in 10 years) after 2000 because of the obvious effectiveness of Green for Grain Project. Furthermore, the variation was negligible in the Tibetan Plateau.ZHAO Guosong LIU Jiyuan KUANG Wenhui OUYANG Zhiyun XIE Zhenglei 2015Journal of Geographical Sciences2015,25,5:26
5Simulating dynamic urban expansion at regional scale in Beijing-Tianjin-Tangshan Metropolitan Area显示文摘在地区性的规模的动态城市的扩大模拟是在陆地使用 / 盖住变化(LUCC ) 和都市化影响的全球环境变化的重要研究方法论之一。然而,以前的研究显示为在本地规模的未来情形的单个城市的扩大模拟不能为描绘并且解释地区性的都市化和全球环境变化的交互机制满足要求。这研究构造了一个地区性的动态城市的扩大模型(Reg-DUEM ) 对由集成人工的神经网络(ANN ) 和细胞的自动机(CA ) 模型的不同情形合适。第一,我们分析了城市的扩大的时间、空间的特征并且获得了用陆地使用 / 盖住的规则改变的优先的知识 Beijing-Tianjin-Tangshan 的数据集大主教区域。在不同情形下面的城市的扩大当时是的未来基于一个基线模型,经济模型,政策模型和结构的调整模型模仿了。结果显示 Reg-DUEM 在宏政策影响的地区性的规模为非线性的扩大模拟有好可靠性。模仿的结果显示出从大城市的区域的不同情形的城市的扩大模式有的那未来巨大的时间空间的差别。未来城市的扩大将沿着沿海的带从北京宗主国快速变到天津和 Tangshan 城市的圆周。KUANG Wenhui 2011Journal of Geographical Sciences2011,21,2:22
6Evaluating impervious surface growth and its impacts on water environment in Beijing- Tianjin-Tangshan Metropolitan Area显示文摘在地区性的规模的不可渗透的表面区域(ISA ) 是为在都市化和全球环境变化的相互作用下面检验陆地使用 / 盖住变化(LUCC ) 生态系统过程气候变化的相互作用和机制的重要环境因素之一。从在地区性的规模的遥远地察觉到的数据的 ISA 的及时、精确的抽取是挑战性的。这研究基于 MODIS 和 DMSP-OLS 数据和瓷器陆地使用 / 盖住数据的加入探索了 ISA 抽取。在在 250 m 的一个空间决定的在 2000 和 2008 的 Beijing-Tianjin-Tangshan 大城市的区域(BTTMA ) 的 ISA 数据集被开发,他们的空间与时间的变化被分析,并且他们水质量上的影响然后被评估。结果显示在 BTTMA 的 ISA 从 2000 ~ 2008 在紧张和程度两个都沿着城市的穗,交通走廊和沿海的带很快增加了。在 Hebei 省的三个城市(Tangshan, Langfang 和 Qinhuangdao ) 有生长在导致逐渐地把工业转移到附近的区域的城市里由于 population-resources-environments 的压力比北京评估的更高的 ISA。在 BTTMA 的稠密的 ISA 分发在 Haihe 河分水岭在水质量上有严肃的影响。同时,在亚分水岭的 ISA 的比例与河货到付款和 NH3-N 的密度有显著地线性的关系。Wenhui Kuang 2012Journal of Geographical Sciences2012,22,3:16
7An EcoCity model for regulating urban land cover structure and thermal environment: Taking Beijing as an example显示文摘Urban land-use/cover changes and their effects on the eco-environment have long been an active research topic in the urbanization field. However, the characteristics of urban inner spatial heterogeneity and its quantitative relationship with thermal environment are still poorly understood, resulting in ineffective application in urban ecological planning and management.Through the integration of 'spatial structure theory' in urban geography and 'surface energy balance' in urban climatology, we proposed a new concept of urban surface structure and thermal environment regulation to reveal the mechanism between urban spatial structure and surface thermal environment. We developed the EcoCity model for regulating urban land cover structure and thermal environment, and established the eco-regulation thresholds of urban surface thermal environments. Based on the comprehensive analysis of experimental observation, remotely sensed and meteorological data, we examined the spatial patterns of urban habitation, industrial, infrastructure service, and ecological spaces. We examined the impacts of internal land-cover components(e.g., urban impervious surfaces, greenness, and water) on surface radiation and heat flux. This research indicated that difference of thermal environments among urban functional areas is closely related to the proportions of the land-cover components.The highly dense impervious surface areas in commercial and residential zones significantly increased land surface temperature through increasing sensible heat flux, while greenness and water decrease land surface temperature through increasing latent heat flux. We also found that different functional zones due to various proportions of green spaces have various heat dissipation roles and ecological thresholds. Urban greening projects in highly dense impervious surfaces areas such as commercial, transportation, and residential zones are especially effective in promoting latent heat dissipation efficiency of vegetation, leading to strongly cooling effect of unit vegetation coverage. This research indicates that the EcoCity model provides the fundamentals to understand the coupled mechanism between urban land use structure and surface flux and the analysis of their spatiotemporal characteristics. This model provides a general computational model system for defining urban heat island mitigation, the greening ratio indexes, and their regulating thresholds for different functional zones.KUANG WenHui YANG TianRong LIU AiLin ZHANG Chi LU DengSheng CHI WenFeng 2017Science China Earth Sciences2017,60,6:16
8Laparoscopic versus open pancreaticoduodenectomy for pancreatic ductal adenocarcinoma:a propensity score matching analysis显示文摘Background:A growing body of evidence supports the use of laparoscopic pancreaticoduodenectomy(LPD)as an efficient and feasible surgical technique.However,few studies have investigated its applicability in pancreatic ductal adenocarcinoma(PDAC),and the long-term efficacy of LPD on PDAC remains unclear.This study aimed to compare the short-and long-term outcomes between LPD and open pancreaticoduodenectomy(OPD)for PDAC.Methods:The data of patients who had OPD or LPD for PDAC between January 2013 and September 2017 were retrieved.Their postoperative outcomes and survival were compared after propensity score matching.Results:A total of 309 patients were included.After a 2:1 matching,93 cases in the OPD group and 55 in the LPD group were identified.Delayed gastric emptying(DGE),particularly grade B/C DGE,occurred less frequently in the LPD group than in the OPD group(1.8%vs.36.6%,P<0.001;1.8%vs.22.6%,P=0.001).The overall complication rates were significantly lower in the LPD group than in the OPD group(49.1%vs.71.0%,P=0.008),whereas the rates of major complications were similar(10.9%vs.14.0%,P=0.590).In addition,the median overall survival was comparable between the two groups(20.0 vs.18.7 months,P=0.293).Conclusion:LPD was found to be technically feasible with efficacy similar to OPD for patients with PDAC.Wentao Zhou Weiwei Jin Dansong Wang Chao Lu Xuefeng Xu Renchao Zhang Tiantao Kuang Yucheng Zhou Wenchuan Wu Dayong Jin Yiping Mou Wenhui Lou 2019Cancer Communications2019,39,1:14
9Cropland redistribution to marginal lands undermines environmental sustainability显示文摘Cropland redistribution to marginal land has been reported worldwide;however,the resulting impacts on environmental sustainability have not been investigated sufficiently.Here we investigated the environmental impacts of cropland redistribution in China.As a result of urbanization-induced loss of high-quality croplands in south China(~8.5 t ha^(-1)),croplands expanded to marginal lands in northeast(~4.5 t ha^(-1)) and northwest China(~2.9 t ha^(-1)) during 1990-2015 to pursue food security.However,the reclamation in these low-yield and ecologically vulnerable zones considerably undermined local environmental sustainability,for example increasing wind erosion(+3.47%),irrigation water consumption(+34.42%),fertilizer use(+20.02%) and decreasing natural habitats(-3.11%).Forecasts show that further reclamation in marginal lands per current policies would exacerbate environmental costs by 2050.The future cropland security risk will be remarkably intensified because of the conflict between food production and environmental sustainability.Our research suggests that globally emerging reclamation of marginal lands should be restricted and crop yield boost should be encouraged for both food security and environmental benefits.Wenhui Kuang Jiyuan Liu Hanqin Tian Hao Shi Jinwei Dong Changqing Song Xiaoyong Li Guoming Du Yali Hou Dengsheng Lu Wenfeng Chi Tao Pan Shuwen Zhang Rafiq Hamdi Zherui Yin Huimin Yan Changzhen Yan Shixin Wu Rendong Li Jiuchun Yang Yinyin Dou Wenbin Wu Liqiao Liang Bao Xiang Shiqi Yang 2022National Science Review2022,9,1:13
10Continuous land cover change monitoring in the remote sensing big data era显示文摘Since the late 20th century,global change issues have attracted lots of attention.As a key component of global changes,land cover and land use information has been increasingly important for improved understanding of global environmental changes and feedbacks between social and environmental systems(Verburg et al.,2015).A set of national and global scale land cover/use products with higher spatial and temporal resolutions have been developed to fill this gap.In China,existing efforts include China’sDONG JinWei KUANG WenHui LIU JiYuan 2017Science China Earth Sciences2017,60,12:13
11Mapping global impervious surface area and green space within urban environments显示文摘The mapping of impervious surface area(ISA) and urban green space(UGS) is essential for improving the urban environmental quality toward ecological, livable, and sustainable goals. Currently, accurate ISA and UGS products are lacking in urban areas at the global scale. This study established regression models that estimated the fraction of ISA/UGS in global 30 cities for validation using MODIS NDVI and DMSP/OLS nighttime light imageries. A global dataset of ISA and UGS fraction with a spatial resolution of 250 m×250 m was developed using the regression model, with a mean relative error of 0.19 for its ISA. The results showed the global urban area of 76.29×10~4 km^2, which was primarily distributed in central Europe, eastern Asia,and central and eastern North America. The urban land area in North America, Europe, and Asia was 66.3×10~4 km^2, accounting for 86.91% of the world’s urban area;the urban land area of the top 50 countries accounted for 59.32% of the total urban land area in the world. The global ISA of 45.26×10~4 km^2 was mainly distributed in central and southern North America, eastern Asia, and Europe, as well as coastal regions around the world. The proportion of ISA situated in built-up areas on the continental scale followed the order of Africa(>70%)>South America>Oceania>Asia(>60%)>North America>Europe(>50%), and these areas were mostly in southeastern North America, southwestern Europe, and eastern and western Asia. North America, Europe, and Asia accounted for 89.44% of the world’s total UGS. The cities of developed countries in Europe and North America exposed a dramatic mosaic of ISA and UGS composites in urban construction. Therefore, the proportion of UGS is relatively high in those cities. However, in developing and underdeveloped countries, the proportion of UGS in built-up areas is relatively low, and urban environments need to be improved for livability.Wenhui KUANG 2019Science China Earth Sciences2019,62,10:12
12Remote sensing-based artificial surface cover classification in Asia and spatial pattern analysis显示文摘Artificial surfaces, characterized with intensive land-use changes and complex landscape structures, are important indicators of human impacts on terrestrial ecosystems. Without high-resolution land-cover data at continental scale, it is hard to evaluate the impacts of urbanization on regional climate, ecosystem processes and global environment. This study constructed a hierarchical classification system for artificial surfaces, promoted a remote sensing method to retrieve subpixel components of artificial surfaces from 30-m resolution satellite imageries(Globe Land30) and developed a series of data products of high-precision urban built-up areas including impervious surface and vegetation cover in Asia in 2010. Our assessment, based on multisource data and expert knowledge, showed that the overall accuracy of classification was 90.79%. The mean relative error for the impervious surface components of cities was 0.87. The local error of the extracted information was closely related to the heterogeneity of urban buildings and vegetation in different climate zones. According to our results, the urban built-up area was 18.18×104 km2, accounting for 0.59% of the total land surface areas in Asia; urban impervious surfaces were 11.65×104 km2, accounting for 64.09% of the total urban built-up area in Asia. Vegetation and bare soils accounted for 34.56% of the urban built-up areas. There were three gradients: a concentrated distribution, a scattered distribution and an indeterminate distribution from east to west in terms of spatial pattern of urban impervious surfaces. China, India and Japan ranked as the top three countries with the largest impervious surface areas, which respectively accounted for 32.77%, 16.10% and 11.93% of the urban impervious surface area of Asia. We found the proportions of impervious surface and vegetation cover within urban built-up areas were closely related to the economic development degree of the country and regional climate environment. Built-up areas in developed countries had relatively low impervious surface and high public green vegetation cover, with 50–60% urban impervious surfaces in Japan, South Korea and Singapore. In comparison, the proportion of urban impervious surfaces in developing countries is approaching or exceeding 80% in Asia. In general, the composition and spatial patterns of built-up areas reflected population aggregation and economic development level as well as their impacts on the health of the environment in the sub-watershed.KUANG WenHui CHEN LiJun LIU JiYuan XIANG WeiNing CHI WenFeng LU DengSheng YANG TianRong PAN Tao LIU AiLin 2016Science China Earth Sciences2016,59,9:12
13Examining the influence of the implementation of Major Function-oriented Zones on built-up area expansion in China显示文摘中国实现了国家策略让主要面向功能的地区(MFOZ ) 自从 2010,实现国家持续开发的目标。分析并且比较时间空间的特征和差别在的这研究布满建筑物为用一个中国 s 陆地使用数据库(CLUD ) 的瓷器 MFOZ 的区域在 2000-2010 和 2010-2013 的时期源于高分辨率的遥远地察觉到的图象。总结:(1 ) 百分比布满建筑物在每 MFOZ 的区域是显著地不同的,基于主要函数的分发揭示国家陆地开发的坡度特征。(2 ) 年度生长在布满建筑物,在最佳的发展地区(ODZ ) 的区域与时期 2000-2010 相比在 2010-2013 期间显著地减少了年度生长在布满建筑物在重要进展地区(KDZ ) 的区域,农业生产地区(APZ ) 和关键生态的功能地区(KEFZ ) 显著地增加了。(3 ) 在 ODZ,的平均年度增加布满建筑物在长江三角洲区域的区域比在另外的区域显著地高;平均区域增加和增加的率布满建筑物在 KDZ 的区域比在另外的区域在西方的区域是更快的;平均年度区域生长布满建筑物在在东北的 APZ 的区域,中央、西方的区域平均象以前的十年一样两次高;在动态度的变化和增加的年度率布满建筑物区域在在中央区域的 KEFZ 是很著名的。(4 ) 空间模式和特征布满建筑物在时期 2010-2013 的区域扩大为 MFOZ 反映了计划的坡度特征。但是率局部地增加在布满建筑物在 ODZ, APZ 和 KEFZ 的区域是快的,有效措施必须因此在国家、地区性的政策的实现被采用。结论显示了这些方法,结果为在在中国优化国家陆地开发的未来规定策略是有意义的。LIU Wenchao LIU Jiyuan KUANG Wenhui NING Jia 2017Journal of Geographical Sciences2017,27,6:12
14Spatio-temporal characteristics of intra-urban land cover in the cities of China and USA from 1978 to 2010显示文摘城市的陆地盖子在一个城市生态系统上有主要影响服务和它的城市的居住环境的固有的质量。中国城市里的不可渗透的表面区域和绿区域的时间空间的分发与美国城市比较展出了显著地显著的差别。这研究集中了于用六中国人(n=3 ) 和美国(n=3 ) 监视并且比较时间空间的动力学,陆地盖子模式和功能的区域的特征城市。学习数据在时期期间从 Landsat TM/MSS 形象被对照 19782010。结果显示中国城市在过去的三十年简洁地发展了,当开发显著地在美国城市之中被驱散时。美国城市里的吝啬的植被范围是在中国城市的凝块之中发现了的约 2.2 次。在中国城市以内的陆地使用类型是显著地更复杂,与不可渗透的表面区域的更高的密度。相反地,中心商业区(CBD ) 和在美国城市以内的居住区域由不可渗透的表面区域的一个更低的比例和绿土地的一个更高的比例组成。结果可以被用来在中国和美国的城市的计划和管理努力贡献未来。CHI Wenfeng SHI Wenjiao KUANG Wenhui 2015Journal of Geographical Sciences2015,25,1:11
15Impact of urban expansion on meteorological observation data and overestimation to regional air temperature in China显示文摘自从改革的实现并且在 1970 年代末在中国开创政策,一些气象学的车站由于城市的扩大消极地进入了城市。在在车站附近的表面和开发环境的变化影响了空气温度的观察。当来自城市的车站的观察数据在公民或地区性的规模空气温度数据集的插值被使用时,他们能导致地区性的空气温度的 overestimation 和对温暖的不精密的评价。在这研究,越过中国包围 756 个气象学的车站的内在的表面在很多时间间隔上基于遥感图象被识别区分进入了城市的农村车站。在把观察数据从被城市的扩大影响了的这些车站移开以后,然后,背景空气温度的数据集被插入内推产生从仍然保持农村的观察数据驻扎。吝啬的城市的热岛效果紧张自从 1970 被从城市的车站把原来的观察记录与背景空气作比较估计,温度插入内推。结果证明那城市的热岛效果确实由于城市的扩大发生,与在比在另外的季节的冬季的更高的紧张。然后,地区性的空气温度的 overestimation 被比较分别地由所有车站和农村车站被插入内推的空气温度的二种格子数据集评估观察数据。空间地, overestimation 比在中国的中央部分在东方中国是相对更高的;然而,两个区域比的展出高得多的效果在西方的中国被观察。我们在最后 40 年里结束了那在中国的温度增加了大约 1.58 的平均数,降水,浅地面温度和 NDVI,哪个 3 吗??SHAO Quanqin SUN Chaoyang LIU Jiyuan HE Jianfeng KUANG wenhui TAO Fulu 2011Journal of Geographical Sciences2011,21,6:10
16Spatio-temporal Patterns of Intra-urban Land Use Change in Beijing,China Between 1984 and 2008显示文摘Urban internal structure is essential information for urban geography researchers and urban planners or managers. This research aims to examine the spatial structure changes of internal urban land use based on the interpreted datasets of 1984 and 2008. Spatio-temporal patterns of internal land use conversion and urban expansion are analyzed, and then dominant driving factors (e.g., social economy, population growth and urban planning) were identified. The results indicate that Beijing′s intra-urban layout has experienced tremendous adjustment from compact to disperse configure, otherwise its function objects have shifted from the major economic and industrial development before the 1990s to the combination with cultural, high-technological and inhabitable city at present. The dominant urban land use transformations include the relocation of industrial lands from core districts to suburban or other provinces, and the accelerating expansion of residential areas and green spaces for supplying the demand of housing and ecological protection. Although Beijing′s urban planning has experienced three major adjustments and improvement since the 1980s, its optimization of urban internal patterns still remains a challenge.KUANG Wenhui 2012Chinese Geographical Science2012,22,2:10
17Modeling the radiation balance of different urban underlying surfaces显示文摘An urban net all-wave radiation parameterization scheme is evaluated using annual datasets for 2010 recorded at a Beijing urban observation site.The statistical relationship between observed data and simulation data of net radiation has a correlation coefficient of 0.98 and model efficiency of 0.93.Therefore,it can be used to simulate the radiation balance of Beijing.This study analyzes the variation in the radiation balance for different underlying surfaces.To simulate radiation balance differences,we set four pure land-cover types(forest,grass,roads,and buildings).Keeping all other conditions inputted unchanged,we model the radiation balance by changing the land-cover type.The results show that the effects of different underlying surfaces on radiation differ,and that there is much upward long-wave radiation,accounting for 84.3% of the total radiation energy falling incident on the land surface.The annual averages of net radiation for the four land-cover types are in the range of 38.2-53.4 W/m2.The net radiation of the grass surface is minimal while that of the roads surface is maximal.Additionally,with urbanization the net radiation values of common types of land-cover change,such as conversion from forest to roads,grass to roads,and grass to buildings,all have increasing trends,indicating that net radiation usually increases with urban sprawl.CUI YaoPing LIU JiYuan HU YunFeng WANG JunBang KUANG WenHui 2012Chinese Science Bulletin2012,57,9:9
18Land-cover changes of national nature reserves in China显示文摘为阻止生态系统降级,保护自然产地并且保存在产地以内的生物多样性, 2588 个自然保护区在 2010 的结束在中国被建立了。全部的区域直到 1.4944 亿哈并且盖住超过 15% 汉语陆上的表面。作为生物多样性变化的主要驱动程序,陆地封面变化直接影响生态系统结构和函数。在这篇论文, 180 个国家自然保护区(NNR ) 被选择,他们的全部的区域是 4471 万哈,为在中国的 29.9% 所有 NNR 的财务。以生态系统特征和他们的主要保护的目标,所有选择 NNR 被分类进 7 种类型。陆地封面(PNCIL ) 的一个积极、否定的变化索引被开发从 1980 年代末分析每种 NNR 类型的陆地封面变化到 2005。结果证明除了森林生态系统储备,所有选择 NNR 类型的陆地封面与逐渐地减轻的降级的减少的率,而是率有 degradated 到某个度。在所有核心地区的陆地封面的吝啬的积极、否定的变化率分别地在 0.69% 和 0.16% 减少了。在核心地区的陆地封面的风景模式在缓冲区地区和试验性的地区是比那更稳定的。而且,在选择 NNR 的陆地封面的生态的差异和补丁连接通常增加了。简言之,在中国的 180 选择 NNR 的陆地封面在建立的 NNR 以后有一个有益的变化趋势,特别在 1995 和 2005 之间。FAN Zemeng ZHANG Xuan LI Jing YUE Tianxiang LIU Jiyuan XIANG Bao KUANG Wenhui 2013Journal of Geographical Sciences2013,23,2:8
19Seasonal Variation in Air Temperature and Relative Humidity on Building Areas and in Green Spaces in Beijing, China显示文摘The cooling and humidifying effects of urban parks are an essential component of city ecosystems in terms of regulating microclimates or mitigating urban heat islands(UHIs).Air temperature and relative humidity are two main factors of thermal environmental comfort and have a critical impact on the urban environmental quality of human settlements.We measured the 2-m height air temperature and relative humidity at the Beijing Olympic Park and a nearby building roof for more than 1 year to elucidate seasonal variations in air temperature and relative humidity,as well as to investigate the outdoor thermal comfort.The results showed that the lawn of the park could,on average,reduce the air temperature by(0.80±0.19)℃,and increase the relative humidity by(5.24±2.91)% relative to the values measured at the building roof during daytime.During the nighttime,the lawn of the park reduced the air temperature by(2.64±0.64)℃ and increased the relative humidity by(10.77±5.20)%.The park was cooler and more humid than surrounding building area,especially in night period(more pronounced cooling with 1.84℃).Additionally,the lawn of the park could improve outdoor thermal comfort through its cooling and humidifying effects.The level of thermal comfort in the park was higher than that around the building roof for a total of 11 days annually in which it was above one or more thermal comfort levels(average reduced human comfort index of 0.92)except during the winter.KUANG Wenhui 2020Chinese Geographical Science2020,30,1:7
20Urban surface heat fluxes infrared remote sensing inversion and their relationship with land use types显示文摘用翠菊(先进卫星转菠的热排放和思考辐射计) 红外线的遥感数据我们城市的表面的参数加热流动适用的 inversed PCACA 模型和理论位置算法,然后我们分析了使用在表面热流动和精力平衡上打的不同土地的影响。在这研究, Kumagaya,在 Saitama 府的一个城市,日本,作为试验性的区域被选择。因为这个模型与复杂表面结构和罐头在城市的区域在热流动评价的过程要求更少的参数, PCACA 模型为在城市的区域的表面热流动评价是可行的结果表演减少无常。并且我们发现不同陆地使用类型显著地在表面热流动上显示了高度异质。在下顺序的鲍恩比率的大小是工业的,居住,交通,机构的、干燥农田,绿空间,和水身体。在一样的气象学的条件下面,在在不同表面封面之中的鲍恩比率有不同特征和地区性的差别,显示在城市的构造陆地的更高理智的热流动和更低的潜伏的热流动,当更低时在盖住植被的区域的理智的热流动和更高潜伏的热流动,城市的区域的外边。城市的不可渗透的表面区域的增加引起了由城市散漫能扩大理智的热流动和鲍恩比率以便它引起增加城市的表面温度和空气温度,它是所谓的热岛效果的机制。LIU Yue SHINTARO Goto ZHUANG Dafang KUANG Wenhui 2012Journal of Geographical Sciences2012,22,4:6
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