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Digital Application Objectives and Benefit Analysis of BIM Technology in Large-Scale Comprehensive Development Projects
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作者 Chunhui Yang 《Journal of World Architecture》 2024年第5期24-28,共5页
This paper discusses the digital application and benefit analysis of building information model(BIM)technology in the large-scale comprehensive development project of the Guangxi headquarters base.The project covers a... This paper discusses the digital application and benefit analysis of building information model(BIM)technology in the large-scale comprehensive development project of the Guangxi headquarters base.The project covers a total area of 92,100 square meters,with a total construction area of 379,700 square meters,including a variety of architectural forms.Through three-dimensional modeling and simulation analysis,BIM technology significantly enhances the design quality and efficiency,shortens the design cycle by about 20%,and promotes the collaboration and integration of project management,improving the management efficiency by about 25%.During the construction phase,the collision detection and four-dimensional visual management functions of BIM technology have improved construction efficiency by about 15%and saved the cost by about 10%.In addition,BIM technology has promoted green building and sustainable development,achieved the dual improvement of technical and economic indicators and social and economic benefits,set an example for enterprises in digital transformation,and opened up new market businesses. 展开更多
关键词 Building information model technology large-scale comprehensive development Digital application Benefit analysis
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Present Situations and Suggestions for Large-scale Development of Chenopodium quinoa Willd. 被引量:1
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作者 Wei LU Xinyu WANG +4 位作者 Yu ZHAO Ming GUO Meiyan PEI Zhimin WEI Chuan LU 《Asian Agricultural Research》 2021年第3期14-16,共3页
In this paper,based on the study of Chenopodium quinoa Willd.planting,it is concluded that the current situations of large-scale development of C.quinoa Willd.include the following four aspects:first,the research on C... In this paper,based on the study of Chenopodium quinoa Willd.planting,it is concluded that the current situations of large-scale development of C.quinoa Willd.include the following four aspects:first,the research on C.quinoa Willd.varieties needs to be strengthened;second,it is insufficient to master the training environment and cultivation techniques;third,the large-scale planting of C.quinoa Willd.is not enough;fourth,the degree of mechanization of C.quinoa Willd.planting is not enough.In view of the above situation,this paper puts forward the following effective suggestions to strengthen the large-scale development of C.quinoa Willd.:the first is to increase the investment in C.quinoa Willd.variety research;the second is to strengthen the analysis of introduction and screening of C.quinoa Willd.varieties;the third is to study the best planting environment and cultivation techniques of C.quinoa Willd.;the fourth is to increase the scale of mechanized production of C.quinoa Willd.;the fifth is to increase the research and development of C.quinoa Willd.related products and their deep processing technology. 展开更多
关键词 Chenopodium quinoa Willd. large-scale development Present situations Suggestions
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Large-scale gas accumulation mechanisms and reservoir-forming geological effects in sandstones of Central and Western China 被引量:1
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作者 LI Wei WANG Xueke +3 位作者 ZHANG Benjian CHEN Zhuxin PEI Senqi YU Zhichao 《Petroleum Exploration and Development》 2020年第4期714-725,共12页
Large-scale gas accumulation areas in large oil-gas basins in central and Western China have multiple special accumulation mechanisms and different accumulation effects.Based on the geological theory and method of nat... Large-scale gas accumulation areas in large oil-gas basins in central and Western China have multiple special accumulation mechanisms and different accumulation effects.Based on the geological theory and method of natural gas reservoir formation,this study examined the regional geological and structural background,formation burial evolution,basic characteristics of gas reservoirs,and fluid geology and geochemistry of typical petroliferous basins.The results show that the geological processes such as structural pumping,mudstone water absorption,water-soluble gas degasification and fluid sequestration caused by uplift and denudation since Himalayan stage all can form large-scale gas accumulation and different geological effects of gas accumulation.For example,the large-scale structural pumping effect and fluid sequestration effect are conducive to the occurrence of regional ultra-high pressure fluid and the formation of large-scale ultra-high pressure gas field;mudstone water absorption effect in the formation with low thickness ratio of sandstone to formation is conducive to the development of regional low-pressure and water free gas reservoir;the water-soluble gas degasification effect in large-scale thick sandstone can not only form large-scale natural gas accumulation;moreover,the degasification of water-soluble gas produced by the lateral migration of formation water will produce regional and regular isotopic fractionation effect of natural gas,that is,the farther the migration distance of water-soluble gas is,the heavier the carbon isotopic composition of methane formed by the accumulation. 展开更多
关键词 Central and western China basins large-scale natural gas accumulation mechanism structural pumping effect mudstone water absorption effect water-soluble gas degasification effect fluid sequestration effect natural gas reservoir formation
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NEW DEVELOPMENTS IN WESTERN POPULIST POLITICS IN 2016
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作者 ZHOU SUIMING 《Contemporary World》 2017年第2期38-41,共4页
For Westerners,2016 was a year of frequent 'black swan' events.Following a referendum held on June 23,Britain decided to leave the European Union.On November 8,Donald Trump won the U.S.presidential election un... For Westerners,2016 was a year of frequent 'black swan' events.Following a referendum held on June 23,Britain decided to leave the European Union.On November 8,Donald Trump won the U.S.presidential election unsurprisingly.Another referendum was held in Italy on December 展开更多
关键词 into on IS IT of that NEW developments IN western POPULIST POLITICS IN 2016 for
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Eco-environment Evolution and Its Sustainable Development Strategies in Western China 被引量:7
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作者 张巧显 柯兵 +2 位作者 刘昕 刘国华 吴钢 《Agricultural Science & Technology》 CAS 2010年第1期176-181,共6页
Natural condition in Western China is relatively poor and regional economy level is low. The ecological environment has been seriously damaged by population growth and over-exploitation of natural resources. It is ver... Natural condition in Western China is relatively poor and regional economy level is low. The ecological environment has been seriously damaged by population growth and over-exploitation of natural resources. It is very important for coordinating the regional development and safeguarding ecological security to discuss the eco-environment evolution trend and its sustainable development strategies in Western China. Based on analyzing documents and relative research,the changes of main ecological and environmental problems in the western region,such as degradation of forest and grassland ecosystems,shrinkage of wetland,desertification,water and soil erosion,etc. were synthetically discussed. Then,according to the development trend,some countermeasures for eco-environment protection and rehabilitation and sustainable development were proposed. 展开更多
关键词 Eco-environment evolution Ecological degradation Sustainable development western China
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Spatial-temporal Dynamics and Driving Forces of Land Development Intensity in the Western China from 2000 to 2015 被引量:17
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作者 HUANG Xin HUANG Xiaojun +2 位作者 LIU Mengmeng WANG Bo ZHAO Yonghua 《Chinese Geographical Science》 SCIE CSCD 2020年第1期16-29,共14页
The change in land development intensity is an important perspective to reflect the variation in regional social and economic development and spatial differentiation.In this paper,spatial statistical analysis,Ordinary... The change in land development intensity is an important perspective to reflect the variation in regional social and economic development and spatial differentiation.In this paper,spatial statistical analysis,Ordinary Least Squares(OLS),and Geographically weighted regression(GWR)methods are used to systematically analyse the spatial-temporal characteristics and driving forces of land development intensity for 131 spatial units in the western China from 2000 to 2015.The findings of the study are as follows:1)The land development intensity in the western China has been increasing rapidly.From 2000 to 2015,land development intensity increased by 3.4 times on average.2)The hotspot areas have shifted from central Inner Mongolia,northern Shaanxi and the Beibu Gulf of Guangxi to the Guanzhong Plain and the Chengdu-Chongqing urban agglomeration.The areas of cold spots were mainly concentrated in the Qinghai-Tibet Plateau,Yunnan,and Xinjiang.3)Investment intensity and the natural environment have always been the main drivers of land development intensity in the western China.Investment played a powerful role in promoting land development intensity,while the natural and ecological environment distinctly constrained such development.The effect of the economic factors on land development intensity in the western China has changed,which is reflected in the driving factor of construction land development shifting from economic growth in 2000 to economic structure,especially industrial structure,in 2015. 展开更多
关键词 construction land land development intensity spatial-temporal dynamic driving force the western China
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Anomalous Western Pacific Subtropical High during El Nino Developing Summer in Comparison with Decaying Summer 被引量:7
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作者 Feng XUE Xiao DONG Fangxing FAN 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2018年第3期360-367,共8页
The anomalous behavior of the western Pacific subtropical high (WPSH) in E1 Nifio developing summer is studied based on the composite results of eight major E1 Nifio events during 1979-2013. It is shown that the WPS... The anomalous behavior of the western Pacific subtropical high (WPSH) in E1 Nifio developing summer is studied based on the composite results of eight major E1 Nifio events during 1979-2013. It is shown that the WPSH tends to retreat eastwards with weak intensity during the developing summer. The anomaly exhibits an intraseasonal variation with a weaker anomaly in June and July and a stronger anomaly in August, indicating that different underlying physical mechanisms may be responsible for the anomalous WPSH during early and late summer periods. In June and July, owing to the cold advection anomaly characterized as a weak northerly anomaly from high latitudes, geopotential height in East Asia is reduced and the WPSH tends to retreat eastwards slightly. By contrast, enhanced convection over the warm pool in August makes the atmosphere more sensitive to E1 Nifio forcing. Consequently, a cyclonic anomaly in the western Pacific is induced, which is consistent with the seasonal march of atmospheric circulation from July to August. Accordingly, geopotential height in the western Pacific is reduced significantly, and the WPSH tends to retreat eastwards remarkably in August. Different from the developing summer, geopotential height in the decaying summer over East Asia and the western Pacific tends to enhance and extend northwards from June to August consistently, reaching the maximum anomaly in August. Therefore, the seasonal march plays an important role in the WPSH anomaly for both the developing and decaying summer. 展开更多
关键词 western Pacific subtropical high El Nifio developing summer decaying summer seasonal march
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Integrated ecosystem assessment for western development of China 被引量:4
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作者 Liu Ji-yuan Masataka Watanabe +2 位作者 Yue Tian-xiang Ouyang Hua Deng Xiang-zheng 《Journal of Geographical Sciences》 SCIE CSCD 2002年第2期4-11,共8页
The objectives of Integrated Ecosystem Assessment for Western Development of China includes: (1) providing scientific basis for ecosystem protection, ecosystem management and ecological construction in the western dev... The objectives of Integrated Ecosystem Assessment for Western Development of China includes: (1) providing scientific basis for ecosystem protection, ecosystem management and ecological construction in the western development; (2) developing complete database and analytical tools and strengthening decision-making support capacity; and (3) improving ecosystem management in China, spreading ecological knowledge to the public, serving decision-making of local and central governments, and promoting socio-economic sustainable development. The design and implementation of the project are of significance under the macro background of western development of China. By the integrated assessment of western China, we can get the first-hand data covering all the environmental factors as well as disclose the situations and their changing trends of ecosystem in the western part of China, which will benefit the decision-making for the central and local governments in the implementation of the western development strategy. In other words, the implementation of the project, to a certain extent, can guarantee the regional sustainable development of western China. 展开更多
关键词 ecosystem assessment Ecosystem Assessment System DIS DSS ecological zone western development China
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Scattered Rural Settlements and Development of Mountainous Regions in Western Sichuan,China 被引量:3
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作者 GAO Yanjun CHEN Guojie SHEN Maoying 《Wuhan University Journal of Natural Sciences》 CAS 2007年第4期737-742,共6页
Making rural settlements of Mountainous Regions in Western Sichuan as the study objects and using symbolic statistical methods, then combining the case study of Daofu County, the paper analyzes the negative impact of ... Making rural settlements of Mountainous Regions in Western Sichuan as the study objects and using symbolic statistical methods, then combining the case study of Daofu County, the paper analyzes the negative impact of the scattered rural settlements on infrastructure construction, farmers' income increase and mountain ecological reconstruction in mountainous regions of western Sichuan. The results indicate that economic density is positively related to both rural settlements density (R^2=0.73) and rural population density (R^2=0.77), and it is the same for relationship between towns density and rural settlements density (R^2=0.88) and between towns density and economic density (R^2=0.71), and the scattered distribution pattern of the rural settlements and shortage of economic centers is a major factor to the lagged socioeconomic development. On the eco-economic zoning to Daofu County, the paper indicates the spatial distribution model and the industrial development model of the rural settlements need to be changed, and rural population should be concentrated in larger rural settlements with development of off-farm industries while infrastructure construction is to reinforced. 展开更多
关键词 mountainous regions in western Sichuan rural settlement scattered distribution developMENT
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The road map for green development of Western China 被引量:2
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作者 Robyn Kruk Derek Thompson +2 位作者 Jiyuan Liu Xiangzheng Deng Peishen Wang 《Chinese Journal of Population,Resources and Environment》 2013年第3期244-252,共9页
China has made some remarkable achievements in sustainable development,but the constant deterioration of the overall trend of the environment has not yet been effectively curbed.To achieve the goal of sustainable deve... China has made some remarkable achievements in sustainable development,but the constant deterioration of the overall trend of the environment has not yet been effectively curbed.To achieve the goal of sustainable development,we must first ensure coordination and coherence of national development goals in different areas and adhere to green development road.To achieve the objectives related to green development,and to clarify the direction of green development in the next 20years,a road map is needed to guide and coordinate the process.This paper describes the concept of the green development road map,introduces a green development road map for the western region,and further elaborates it The road map clarifies the objectives and guiding principles of green development in the western region,points the areas that deserve more concern and institutional innovation,and builds a green development monitoring and evaluation(M&E)framework.Finally,the paper provides corresponding policy recommendations based on the established road map. 展开更多
关键词 green developMENT ROAD MAP the western REGION
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Green and compatible industrial development in Western China 被引量:1
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作者 Zhouying Song Weidong Liu Zhipeng Tang 《Chinese Journal of Population,Resources and Environment》 2014年第1期24-32,共9页
Western China has lagged a lot in terms of industrial structure and economic development,compared with the national average.And China announced its target of CO_2 emission reduction,i.e.by 2020,CO_2 emission per GDP w... Western China has lagged a lot in terms of industrial structure and economic development,compared with the national average.And China announced its target of CO_2 emission reduction,i.e.by 2020,CO_2 emission per GDP will drop by40-45%compared with 2005.The target will be incorporated into China's long-term industrial planning.Against this background,this paper will make a comprehensive examination of the industrial development of Western China,aiming to discover a green and compatible way.First,we analyze the spatiotemporal evolution of regional industrial structure for the period 2000-2010.Second,we try to discover the industrial structure optimization path for Western China by employing the Vector Auto Regression model.Lastly,we try to provide some advice and suggestions for further industrial development in Western China.Our examination shows that further industrial development in Western China should pay full attention to resource conservation and recycling,and develop on a green and compatible path. 展开更多
关键词 western China industrial development optimization model compatible development low-carbon
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China’s Western Development Strategy for Modernization Drive 被引量:5
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作者 Yang Kaizhong 《China Economist》 2021年第3期62-83,共22页
The Western Development Strategy(WDS)is a key aspect of China’s coordinated regional development strategy and effort to build a modern country.The world is undergoing profound changes that have not been witnessed in ... The Western Development Strategy(WDS)is a key aspect of China’s coordinated regional development strategy and effort to build a modern country.The world is undergoing profound changes that have not been witnessed in a century.This paper discusses the WDS’s importance in regards to China’s modernization drive and the great rejuvenation of the Chinese nation.First,this paper identifies the WDS’s mission to improve people’s livelihood in China’s western regions,promote common prosperity for the Eurasian continent,and support the green transition of China’s and Eurasian energy economic and environmental systems,and safeguard ecological security in Asia at large.Second,this paper suggests that the key to the WDS is to reshape the geographical layout of economic activity in the western regions to avoid inefficiency.Specifically,China should develop a compact geographical layout of economic activity in the western regions,introduce a unique competition strategy,as well as find solutions for coordinated regional development based on key river basins.Finally,develop smart internet and inland free ports within the western regions. 展开更多
关键词 China modernized country coordinated regional development western development Strategy(WDS) spatial diseconomies
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Sustainable tourism development in mountain areas in Sumadija and Western Serbia 被引量:2
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作者 MILICEVIC Snezana BOSKOVIC Nikola LAKICEVIC Marija 《Journal of Mountain Science》 SCIE CSCD 2021年第3期735-748,共14页
Sustainable tourism,as an integral part of sustainable development,emerged as a logical outcome of preventing the uncontrolled and excessive use of tourism resources and attractions.This study analyzes whether mountai... Sustainable tourism,as an integral part of sustainable development,emerged as a logical outcome of preventing the uncontrolled and excessive use of tourism resources and attractions.This study analyzes whether mountain tourism development in Serbia can be sustainable and feasible in the long term.Given the heterogeneity of mountains in Serbia in terms of tourism development,the subject of this research is the achieved level of sustainable tourism development in mountains in the most developed and most visited region in Serbia-sumadija and Western Serbia:Zlatibor,Kopaonik,Tara,Zlatar,Mokra Gora and Go?.The sustainable tourism development level was analyzed by using five groups of the EU’s comparative indicators:economic,social,cultural,environmental and tourist satisfaction indicators.The results showed that the development of tourism in the examined mountains is not fully aligned with sustainable development.The tourist satisfaction indicator has the most acceptable values,which is a good basis for further harmonization of tourism development on the principles of sustainability.Economic indicators,especially the ratio of overnight stays and accommodation capacities,show the most unacceptable values,which indicate the need for implementing changes in the process of tourism development in the coming period.The analysis of sustainable tourism in mountain areas in sumadija and the Western Serbia undoubtfully points out that it is necessary to significantly change the current tourism product portfolio,which implies harmonizing mountain tourism development with global trends.Certainly,a comparative analysis that looks at the degree of sustainability of mountain tourism in some countries of the Alpine region,such as Switzerland,Austria and Slovenia,contributes to this.The more intensive development of tourism throughout the year would significantly improve indicators of sustainable tourism in all analyzed mountain areas of Sumadija and Western Serbia.This would improve the value of economic indicators,which are marked as the most unsustainable.The development of tourism in the summer season,especially recreational and adventure tourism,would improve the social and cultural component of sustainable tourism.Environmental dimension of sustainable tourism would be enhanced by the development of ecotourism.By connecting spatially close mountains(Zlatibor,Zlatar,Tara and Mokra Gora)into a unique and integrated tourism destination,synergistic effects would be achieved resulting in international recognition and making the region of?umadija and Western Serbia competitive on the European market. 展开更多
关键词 Sustainable tourism development MOUNTAINS Tourism effects Sustainability indicators Sumadija and western Serbia
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Coordinated management of energy and mineral resources development and control of pollution in Western China
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作者 Shen Lei Gao Li 《Chinese Journal of Population,Resources and Environment》 2013年第3期276-282,共7页
Natural environment is fragile and harsh in Western China where rich energy and mineral resources are endowed,enabling energy and mining development to become a pillar industry of the regions socioeconomic development... Natural environment is fragile and harsh in Western China where rich energy and mineral resources are endowed,enabling energy and mining development to become a pillar industry of the regions socioeconomic development This paper identified the key issues and challenges faced by eco-environment as a result of energy and mining development in Western China.We argued mat mining and energy development have caused various environmental problems,and that environmental degradation is increasingly prominent in Western China,hence,we request coordinated resource development and environmental protection for sustainable development in this region.Based on the above recognitions,this paper put forward relevant policy recommendations:promoting green development vigorously and developing new green energy;formulating and enforcing environmental protection laws and regulations,improving ecological compensation mechanism;establishing green threshold;strengthening integration between western resource-based cities and coastal region to get rid of the"resource curse";improving energy and mineral resources development stakeholders'involvement;coordinating resource taxes and local development funds;and strengthening independent third-party supervision in the whole process of energy and mining 展开更多
关键词 ENERGY and mining environment HARMONIOUS developMENT western China
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Countermeasures on Elevating Self-development Ability of Western Rural Areas on the Basis of Visual Threshold of Human Capital
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作者 LAN Hong-xing College of Politics and Law,Sichuan Agricultural University,Ya’an 625014,China 《Asian Agricultural Research》 2011年第2期123-125,137,共4页
The thesis underscores the significant role of human capital in elevating rural self-development ability.The investment of human capital is making great contribution to western rural economic growth,and it plays an ir... The thesis underscores the significant role of human capital in elevating rural self-development ability.The investment of human capital is making great contribution to western rural economic growth,and it plays an irreplaceable role in promoting the socio-economic development prominently.The characteristics of human resources development in western rural areas for the moment are analyzed as follows:the employment structure is simple;the structure of human resources is irrational;the shortage of human resources aggregate is accompanied by the critical phenomenon of idling;the human resources drain badly;there is low input and low output of talents.The thesis also propounds the fundamental approaches in order to elevating self-development ability of western rural areas:we should practise and implement National Medium and Long-term Planning of Talents Development and lay down as soon as possible the detailed matching policies and measures based on the reality of western rural areas;we should develop the education in western rural areas vigorously,and formulate the developmental strategies of bridging "knowledge gap";we should establish sound rural human resources development system,and reinforce the degree of training returning-home migrant workers;we should adjust the structure of human investment timely as needed,and strengthen the degree of human capital investment conspicuously. 展开更多
关键词 western RURAL Areas BIG development of human resou
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A Vertical and Horizontal Comparison of Sustainable Development Status in Western China from the Perspective of Ecological Footprint 被引量:1
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作者 DU Hui-ying1, DONG Hong-lin1, JIN Bo2 1. Integrated Agricultural Research Center of Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750002, China 2. Cultural Heritage Management Office of Pingluo County of Ningxia Hui Nationality Autonomous Region, Pingluo 753400, China 《Asian Agricultural Research》 2011年第8期18-22,共5页
On the basis of ecological footprint theory, the ecological footprint and ecological carrying capacity of western China and 12 provinces and cities in 2009 are calculated. From the perspective of ecological footprint,... On the basis of ecological footprint theory, the ecological footprint and ecological carrying capacity of western China and 12 provinces and cities in 2009 are calculated. From the perspective of ecological footprint, the sustainable development status of west China and 12 provinces and cities in 2009 and 1999 are compared vertically and horizontally. Results assume that no matter weighting by using local or national ecological carrying capacity, the west area laid in the unsustainable development state in 2009; in 1999, the west area was on the unsustainable development stage taking the local and national level as the reference and it was at the sustainable stage at the global level. In 2009, most provinces in western China laid on the unsustainable stage at the local, national and global level. Compared with that in 2009,few provinces in western China were on the unsustainable stage at different levels. In general, the sustainable developmental momentum of western China in 2009 was weaker than that in ten years ago and many provinces and cities decreased to unsustainable state. 展开更多
关键词 ECOLOGICAL FOOTPRINT ECOLOGICAL carrying capacity
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Historical Medical Exchanges Following the Confluence of Traditional Chinese Medicine and Western Medicine:Coexistence and Mutual Development
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作者 Shi-Yun Chen Kun Qu +1 位作者 Xiao-Jie Liu Zhan Chen 《Chinese Medicine and Culture》 2022年第3期182-189,共8页
This article examines the overall characteristics of historical medical exchanges between China and foreign countries,analyzing their contribution to the development of medicines in the world.It presents a summary of ... This article examines the overall characteristics of historical medical exchanges between China and foreign countries,analyzing their contribution to the development of medicines in the world.It presents a summary of historical experiences of the development of medicines through mutual exchanges.It also provides an objective analysis of the effects of the eastward dissemination of Western medicine on traditional Chinese medicine.The history of their exchanges can be used as a mirror for each to learn from the other’s strengths to offset their own weakness,and achieve the coordinated and balanced development of both traditional Chinese medicine and Western medicine.Such balanced development would enable the world’s medicinal systems to thrive and protect the health of people worldwide. 展开更多
关键词 Historical medical exchanges Medical development Traditional Chinese medicine western medicine
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The Chemistry of Serpentine Soils Developed Over A Podiform Chromite Deposit,Western Sierra Nevada,USA
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作者 Lisa L.STILLINGS Steven W.BLECKER 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2017年第S1期39-,共1页
The Chinese Camp mining district in the western Sierra Nevada of California,USA,contains a serpentinized,ultramafic dunite intrusion with podiform chromite deposits.Serpentine soils have developed over this intrusion,... The Chinese Camp mining district in the western Sierra Nevada of California,USA,contains a serpentinized,ultramafic dunite intrusion with podiform chromite deposits.Serpentine soils have developed over this intrusion,creating a unique ecosystem of endemic vegetation and soils characterized by low Ca/Mg ratios and high Ni and Cr contents.The vegetation and red coloration make it easy to visually distinguish between soils developed over intruded,serpentinized bedrock and unmineralized,adjacent andesite bedrock(Fig.1).The purpose of our study was to compare soil chemistry and vegetative parameters among 3 study-design levels:1)undisturbed serpentine soil,2)undisturbed background soil(non-serpentine,developed over andesite),and 3)serpentine soil disturbed by mining activities.Within each of these l e v*e ls,3 random locations were chosen where weestablished 3,30-m transects(spaced 120-degrees apart).One soil sample was collected at a random location along each transect(0-15 cm depth after removing litter/O horizon).This scheme resulted in the collection of 9replicate soil samples per study-design level.Samples were analyzed for total metal content by ICP-AES/MS(inductively coupled plasma atomic emission spectroscopy/mass spectroscopy),p H,electrical conductivity,and total C/N/S.The vegetative parameter of%canopy cover was measured with a line-point intercept survey along each transect,using 0.6m intervals.Above-ground net primary productivity(ANPP)was estimated by harvesting all aboveground living plant material within a 0.5 m quadrant at 3 random locations along each transect,drying,and weighting the material.Significant differences among design levels were observed for ANPP,canopy cover,total P,total N,and Ca/Mg,where the median values for these parameters decreased in the order undisturbed background>undisturbed serpentine>mining-disturbed serpentine.The highest concentrations of Cr and Ni were found in undisturbed serpentine(medians of 1960 ppm and 2529ppm,respectively)followed by mining-disturbed serpentine(medians of 420 and 2120,respectively)then undisturbed non-serpentine(medians 47.0 and 32.2 ppm,respectively).Soil p H varied significantly among the design levels with a median 5.74 in undisturbed background,median 6.25 in undisturbed serpentine,and median of 7.17 in mining-disturbed serpentine.These data document the distinct differences in soil chemistry and vegetation parameters between undisturbed serpentine soil and adjacent,undisturbed background soil.Efforts toward mining reclamation must recognize these differences and include the correct baseline conditions in the reclamation plan. 展开更多
关键词 USA The Chemistry of Serpentine Soils developed Over A Podiform Chromite Deposit western Sierra Nevada
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Industrial Policy Analysis of Restricted Development Zones in Western China——A Study of State-level Main Producing Areas of Agricultural Products and Key Ecological Functional Areas
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作者 Chen Ying 《Contemporary Social Sciences》 2016年第2期74-85,共12页
As one of the important policies of promoting the formation of main functional areas, the industrial policy directly determines the sustainable growth of space control ability of main functional areas. A restricted de... As one of the important policies of promoting the formation of main functional areas, the industrial policy directly determines the sustainable growth of space control ability of main functional areas. A restricted development zone is a type of main functional area which provides agricultural products and ecological products, assures the supply of national agricultural products and the stability of ecosystems, as well as safeguards the ecological functions and agricultural functions of wider regions by restricting its own development. Therefore scientific, complete and operable industrial policy support is needed. Restricted development zones are distributed widely in western China. With the restriction of their main functions, differential industrial policies should be implemented in the development of the restricted development zones: Dealing well with the relationship between industrial development and ecological protection, developing special industries which are friendly to resources and environment and appropriate for local conditions, guiding and encouraging industries to learn from regions with favorable development conditions, orderly withdrawing industries and enterprises adverse to main functions, facilitating industrial structure upgrading, optimizing industrial organization, improving industrial technological level and rationalizing industrial layout. 展开更多
关键词 western China RESTRICTED development main producing areas of agricultural products KEY ECOLOGICAL functional areas INDUSTRIAL policies
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Green development of western cities from the perspective of informatization and greenization
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作者 LIU Ying-xiao WANG Heng 《Ecological Economy》 2016年第3期227-237,共11页
The Fifth Plenary meeting of the 18 th Central Committee put forward the idea of creative green development, which become the guide which is important concept of economic and social development in our country in the f... The Fifth Plenary meeting of the 18 th Central Committee put forward the idea of creative green development, which become the guide which is important concept of economic and social development in our country in the future. The contradiction between resource environment and economic development is becoming more and more outstanding with the speeding up of urbanization process in western region. The coming of big data and information age, makes the wisdom of ecological city construction to be the mainstream direction of urban development, and green development also become the core of the ecological city wisdom. In ecological concept gradually deepening of the information age, the construction of smart ecological city becomes the mainstream direction, green development also becomes the core of the smart ecological city. The path and strategies of promoting green development of western cities based on the smart ecological cities were presented in this paper, through the analysis of the background of the smart ecological city construction, the calculation of the environment carrying capacity and the ecological footprint, as well as the target for the sustainable green development of the western cities. 展开更多
关键词 western cities green development smart ecological city ecological footprint informatization and greenization
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