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基于转台的中场区InSAR三维成像技术研究
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作者 田国栋 郭妮 《测绘科学》 CSCD 北大核心 2009年第5期100-101,共2页
在中场区通过对相位弯曲补偿进行微波成像,能大大降低对测试距离的要求,本文依据干涉逆合成孔径雷达成像(InSAR)原理,提出中场区滤波-逆投影三维成像算法,在获得目标散射点二维分布和强度信息的同时,还能得到其高度信息,实现中场区目标... 在中场区通过对相位弯曲补偿进行微波成像,能大大降低对测试距离的要求,本文依据干涉逆合成孔径雷达成像(InSAR)原理,提出中场区滤波-逆投影三维成像算法,在获得目标散射点二维分布和强度信息的同时,还能得到其高度信息,实现中场区目标的三维成像。仿真和实验结果表明算法的有效性。 展开更多
关键词 中场区 微波成像 滤波-逆投影算法 INSAR
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Changes in Soil Properties of Paddy Fields Across a Cultivation Chronosequence in Subtropical China 被引量:10
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作者 LIZhong-Pei ZHANGTao-Lin +2 位作者 LIDe-Cheng B.VELDE HANFeng-Xiang 《Pedosphere》 SCIE CAS CSCD 2005年第1期110-119,共10页
Rice production plays a crucial role in the food supply of China and a better understanding of the changes in paddy soil fertility and the management effects is of practical importance for increasing rice productivity... Rice production plays a crucial role in the food supply of China and a better understanding of the changes in paddy soil fertility and the management effects is of practical importance for increasing rice productivity. In this study, field sampling in a typical red soil region of subtropical China, Jiangxi Province, was used to observe changes in the soil physical, chemical, and biological properties in a cultivation chronosequence of paddy fields. After cultivation, clay (< 0.002 mm) content in the soil… 展开更多
关键词 cultivation chronosequence paddy fields soil properties subtropical China
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Variability Modes of the Winter Upper-Level Wind Field over Asian MidHigh Latitude Region 被引量:3
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作者 ZHANG Yao-Cun XIAO Chu-Liang 《Atmospheric and Oceanic Science Letters》 CSCD 2013年第5期295-299,共5页
In this study,the NCEP/NCAR reanalysis dataset was used to analyze the variability modes of the winter upper-level wind field over Asian mid-high latitude region.As shown by the results,the dominant variability modes ... In this study,the NCEP/NCAR reanalysis dataset was used to analyze the variability modes of the winter upper-level wind field over Asian mid-high latitude region.As shown by the results,the dominant variability modes of the winter upper-level wind field over Asian mid-high latitude region are characterized by the out-of-phase variation in the intensity of the subtropical and temperate jets over East Asia and the meridional shift of the subtropical jet axis,on interannual and multiannual scales,respectively.The first leading variability mode can be used as a good measure to represent the integral variation of atmospheric general circulation in Asian mid-latitude region.Composite analyses suggest that the first leading variability mode of the winter upper-level wind field is intimately related to the atmospheric circulation and temperature anomalies in the northern hemispheric mid-latitude region. 展开更多
关键词 East Asian subtropical westerly jet temperate jet variability mode
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Effect of Hue Citadel on the Layout of Traditional Garden Houses Located in Its Area, Vietnam
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作者 Ngoc Tung Nguyen Hirohide Kobayashi Masami Kobayashi 《Journal of Civil Engineering and Architecture》 2011年第10期918-927,共10页
In Hue, the city located in the middle region of Vietnam, the Citadel is known as the place of the last Dynasty in the history of Vietnam, Nguyen (1802-1945). Whereas Nguyen Kings lived in the Purple Forbidden City ... In Hue, the city located in the middle region of Vietnam, the Citadel is known as the place of the last Dynasty in the history of Vietnam, Nguyen (1802-1945). Whereas Nguyen Kings lived in the Purple Forbidden City (the third wall of the Citadel), other members of royal families and high-ranking mandarins lived in Hue Traditional Garden Houses (HTGHs) constructed around and in the Citadel area. This paper is a part of the research that focuses on an approach for sustainable live conservation and application of HTGHs into contemporary use. In this paper, the study aims to consider effects of the Citadel on the layout and arrangement of HTGHs located in its' area by studying alteration in layout elements of those house. Based on field surveys of 91 HTGHs in the Citadel area, it is found that although those houses are altered into various configurations under the impacts of urbanization and modernization, several important traditional elements in layout such as Binh Phong (masonry screen), Be Can (basin), and facing orientation have been maintained, and their layouts reflect a miniature image of Hue Citadel, i.e., there is an integral relationship between the Citadel and HTGHs located in it. This relationship plays an important role for expressing one of unique characteristics of Hue cultural asset, which is unavailable in other regions of Vietnam. 展开更多
关键词 Hue citadel hue traditional garden house layout urbanization.
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Sediment Resuspension Mechanisms in Aquaculture Area, Sanggou Bay 被引量:1
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作者 Zengjie Jiang Guanghua Wang Jianguang Fang 《Journal of Environmental Science and Engineering(A)》 2012年第3期295-302,共8页
The sediment resuspension mechanisms in Sungo Bay, a large-scale aquaculture area in north China, were investigated by analysing data collected during several periods from 2005 to 2006. Nortek 6M ADV current meter and... The sediment resuspension mechanisms in Sungo Bay, a large-scale aquaculture area in north China, were investigated by analysing data collected during several periods from 2005 to 2006. Nortek 6M ADV current meter and YSI6600 were used to collect the field data on current speed, current direction and water turbidities 1 m above the bottom. Based on the collected field data, it could be found that wind-waves and currents were the main driving force for sediment resuspension. The correlation between suspended sediment concentration (SSC) and turbidity (NTU) is SSC = 15.908 x In (NTU) + 7.0888 (n = 33, R2 = 0.7209). Taking the key factor (angle 0) into account, the combination effect between wave and current were expressed. Results showed that the combined shear stress (row) of wave stress (re) and current stress (rw) could be calculated by row = rc + 2√ rcrw sin θ + rw sin^2 θ. The critical shear stress for sediment resuspension was about 0.059 N/m^2. The correlation between suspended sediment concentration and critical shear stress could be expressed by rcw = 238.06 SSC + 25.215 (n = 25, R^2 = 0.7298). 展开更多
关键词 Sediment resuspension wave-current interaction critical shear stress Sanggou Bay.
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Propagation and influence on tropical precipitation of intraseasonal variation over mid-latitude East Asia in boreal winter
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作者 JIAO Yang WU Renguang 《Atmospheric and Oceanic Science Letters》 CSCD 2019年第3期155-161,共7页
The authors investigate the characteristics of propagation and the influence on tropical precipitation of 9–29-day intraseasonal variation over midlatitude East Asia during boreal winter, and find that the intraseaso... The authors investigate the characteristics of propagation and the influence on tropical precipitation of 9–29-day intraseasonal variation over midlatitude East Asia during boreal winter, and find that the intraseasonal wind signal can propagate both eastward and southward. In the case of eastward propagation, the intraseasonal wind signal is mainly confined to the midlatitudes, featuring eastward migration of anomalous cyclones and anticyclones. In the case of southward propagation, intraseasonal meridional wind perturbations may extend from the mid to the low latitudes, and even the equatorial region. The accompanying wind convergence/divergence induces anomalous precipitation in the near-equatorial regions, forming a north–south dipole precipitation anomaly pattern between the southern South China Sea and the eastern China– Japan region. An anomalous meridional overturning circulation plays an important role in linking tropical and midlatitude intraseasonal wind and precipitation variations. 展开更多
关键词 Intraseasonal wind variation midlatitude East Asia eastward and southward propagation tropical precipitation
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Hyper-Rich and Hyper-Luxury in China: The Case of the Most Expensive Gated Communities
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作者 Guillaume Giroir 《Chinese Business Review》 2011年第6期454-466,共13页
Since 2000, we have published fifteen studies on the Chinese upscale gated communities (in Chinese "haohua bieshu qu" or "shehua bieshu qu"). This research was based on various field surveys around big or medium... Since 2000, we have published fifteen studies on the Chinese upscale gated communities (in Chinese "haohua bieshu qu" or "shehua bieshu qu"). This research was based on various field surveys around big or medium cities like Beijing, Shanghai, Guangzhou, Shenzhen, or Suzhou, and a theoretical framework. It also led us to carry out a statistical approach by elaborating a complete database on all the China's high-end gated communities. The main aim of the current article is to focus the analysis on the China's most luxurious zones of villas (e.g., Longhu Yiheyuan villas in Beijing, Ziyuan villas in Shanghai... ). Indirectly, it appears an efficient way to get information on the still mysterious world of the China's very very rich people, their imaginary, their values, and their dreams. This analysis will be developed through two complementary approaches and parts. Firstly, we will discuss the general notion of luxury in China; we also will highlight the specific features of hyper-rich and hyper-luxury in China. It will describe the social stratification of the rich, their spatial distribution and patterns of consumption. In a more holistic approach, the analysis will put into perspective the special status of the rich in a socialist market economy and their very ambivalent image in the Chinese society. Secondly, it will focus on the notion of "residential hyper-luxury". Through field surveys, the analysis will compare the China's most expensive gated communities and elaborate a typology of hyper-luxurious gated communities by underlining their uniqueness and extreme nature. 展开更多
关键词 China RICH LUXURY gated communities
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Chinese Brands at the Crossroad? Demand State in Kerala Markets
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作者 Vanaja Menon Vadakepat 《Chinese Business Review》 2011年第6期424-428,共5页
Globalization and liberalization offer competitive openings for several world brands to the Indian markets. Bestowed with growing disposable incomes, Kerala consumers exhibit wide diversity in their buying habits. App... Globalization and liberalization offer competitive openings for several world brands to the Indian markets. Bestowed with growing disposable incomes, Kerala consumers exhibit wide diversity in their buying habits. Apparently, the emerging fascination for imported brands impels distributers to leave enough space to shelf more "made in China" brands in their showrooms. The substantial increase in consumers' demand for imported goods with considerable attraction for "made in China" products inspired this study to explore the demand state for various types of Chinese products in the Indian regional markets. Divided into two stages, at first, with a primary survey, the study explores the consumers' perception towards selected five vastly available consumer durables such as electrical appliances, handicrafts, stationeries, toys and builds wares. Later, the demand matrix developed from the primary data defines the types of demand prevailing for each category of"made in China" products based on their popularity and consumption in Kerala markets. 展开更多
关键词 MARKETING China brands consumer perception demand state matrix and Kerala
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Comprehensive Research on Focal Mechanism Solutions in the Capital Circle Area of China
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作者 Wu Minjie Wu Anxu +4 位作者 Xu Ping Lin Xiangdong Dong Hongyan Xin Xuexia Li Layue 《Earthquake Research in China》 2014年第1期79-90,共12页
Comprehensive statistical analysis was performed on the basic features of focal mechanisms of 619 ML≥2. 0 earthquakes which occurred in the capital circle area from January 2002 to June 2010. By dividing the capital ... Comprehensive statistical analysis was performed on the basic features of focal mechanisms of 619 ML≥2. 0 earthquakes which occurred in the capital circle area from January 2002 to June 2010. By dividing the capital area into three studying regions based on regional tectonic characteristics,cluster analysis was conducted on the focal mechanisms of all subregions using the longest distance method in the statistical cluster analysis to study the characteristics of tectonic stress tensors. The result shows that dominant P-axis azimuth distribution is NNE-NEE and that of T-axis is NNW-NWW,most of the focal areas are controlled by a horizontal stress field and rupture is mainly of horizontal strike-slip. The maximum principal compression stress orientation is NE75° in the west,NE62° in the middle,and near EW in the east of the capital area. The regional tectonic stress field is characterized by horizontal compression. 展开更多
关键词 Focal mechanism solution Systematic cluster Stress tensor Capital circlearea
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Economy
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《China Today》 2014年第10期12-12,共1页
Shanghai International Gold Trading Center Starts Operation The Shanghai International Gold Trading Center was recently launched as the first international trading platform in China(Shanghai)Pilot Free Trade Zone(... Shanghai International Gold Trading Center Starts Operation The Shanghai International Gold Trading Center was recently launched as the first international trading platform in China(Shanghai)Pilot Free Trade Zone(FTZ).The Shanghai FTZ is also preparing to establish other international trading centers.In the Shanghai gold trading center,foreigners are allowed to invest in China’s gold market.According to Li Jun, 展开更多
关键词 trading deputy preparing Pilot allowed trademark Economy jointly centers director
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In situ measurement of atmospheric carbon dioxide at Yanbian,China:Estimating its northeast Asian emission regions 被引量:1
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作者 JIN FenJi FANG YingYu +5 位作者 CHEN Tie LI DongHao KIM Jooil PARK Mi-Kyung PARK Sunyoung KIM Kyung-Ryul 《Science China Earth Sciences》 SCIE EI CAS 2012年第10期1742-1748,共7页
High-precision(±0.1 ppm) and high-frequency(hourly averaged) in situ measurements of atmospheric carbon dioxide(CO2) were made for the first time from August 2005 to July 2007 at Yanbian,China using a non-dispers... High-precision(±0.1 ppm) and high-frequency(hourly averaged) in situ measurements of atmospheric carbon dioxide(CO2) were made for the first time from August 2005 to July 2007 at Yanbian,China using a non-dispersive Infrared(NDIR) analyzer with National Oceanic and Atmospheric Administration/Earth System Research Laboratory(NOAA/ESRL) standards.The results of these measurements are presented in this paper and are used to investigate the regional representativeness of regional background data at Yanbian and determine the CO2 emission source regions in Northeast Asia.The phase of the monthly variations at Yanbian reflects the special regional characteristics,which were overall in excellent agreement with other observatories in the middle-to-high latitudes in the Northern Hemisphere.Applying a hybrid receptor model to the regional emission source events in cold period(November-April),we estimated the distribution of the major CO2 emissions in the northeast Asia.The results indicated that the strongest potential emission areas contributing to Yanbian are the Beijing & Tianjin metropolitan areas,southwestern part of Shandong Province including Jinan,and Vladivostok.The results of this study reveal the usefulness of in situ CO2 measurements at Yanbian in establishing the scientific foundation for monitoring the large CO2 emission areas in northern China and Russia.Continued monitoring of CO2 at Yanbian within a regional network should provide significant contributions to both understanding the global/regional carbon cycle and constraining "top-down" emissions in Northeast Asia. 展开更多
关键词 carbon dioxide emission regions in situ monitoring Northeast Asia regional background Yanbian
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A study on variations of non-dipole magnetic field over Chinese mainland during 2000 BC to 1990 AD 被引量:1
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作者 FENG Yan JIANG Yong +2 位作者 SUN Han AN ZhenChang MAO Fei 《Science China Earth Sciences》 SCIE EI CAS 2014年第6期1229-1244,共16页
We calculated and analyzed variation of the non-dipole(ND)magnetic field at the millennium scale over the Chinese mainland during 2000 BC–1900 AD using the newest global geomagnetic model,CALS3K.4(3K.4).The newest-ge... We calculated and analyzed variation of the non-dipole(ND)magnetic field at the millennium scale over the Chinese mainland during 2000 BC–1900 AD using the newest global geomagnetic model,CALS3K.4(3K.4).The newest-generation IGRF(IGRF11)was used to verify the results.Taking component Z for example,we calculated and analyzed the distribution and annual change rates of the ND field during 1900–1990 AD every 5 yr,using two models.To thoroughly analyze the contributions of field sources,quadrupole and octupole fields,and others within the ND field at the surface and core-mantle boundary(CMB)were investigated.Results show that there were three main variation phases of the field during the period 2000BC–1900 AD.The mean amplitude roughly reflected the ND field because of the distribution and variation of that field,corresponding somewhat to the mean amplitude change.A magnetic anomaly of the ND field over East Asia(EA)first emerged in 1682 AD,and its extreme intensity had increased a total of 15276.95 nT by 1900 AD.Its location moved continuously southeastward after 1690 AD.The asymmetry between location and intensity of extreme points over EA,particularly during1740–1760 AD,indicates irregularity of fluid motion inside the outer core.Mean annual changes of Z are generally divided into four phases,which first oscillated between 2000 and 800 BC,then increased,decreased and increased in the periods 800BC–300 AD,300–900 AD and 900–1900 AD,respectively.The intensity of mean annual change increased a total of 22.87nT/yr.Anomaly extreme locations based on 3K.4 and IGRF11 over EA centered around 44°N and 103°E for degree(n)greater than 5,and intensities continuously increased with n.During 2000 BC–1990 AD,ND energy of Z at the surface and CMB had decreased in total by 18.29%and 23.23%,respectively.The field source of 26–210 pole fields are more or less affected by the lithospheric field.Energies of higher degree at the surface attenuate by almost 99%compared with CMB,but mean attenuation speeds of the low-degree ND field are faster than high-degree,which implies that the low-degree ND field has a deeper source. 展开更多
关键词 non-dipole geomagnetic field CALS3K.4 IGRF11
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Transition and Transplantation in China's Local Development: The Case of the Yangtze River Delta Region
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作者 Wang Zhi-kai 《Fudan Journal of the Humanities and Social Sciences》 2010年第3期70-90,共21页
In the past nearly 30 years, the emergence of the market economies in China was characterised by geographical concentration of economic activities. The particularly successful cases happened in the Yangtze River Delta... In the past nearly 30 years, the emergence of the market economies in China was characterised by geographical concentration of economic activities. The particularly successful cases happened in the Yangtze River Delta, namely, the two most famous models for local developments in China's economic transformation and market development: the " South Jiangsu Model" in south Jiangsu and the "Wenzhou model" in southeast Zhejiang. Although there have been debates upon the two development models for a considerably long time, both models keep being open in and compatible to local development and globalization. The two models influence each other, keep being in institutional transition through bilateral paths transplantation, i.e. learning from each other and employing cooperation in their developments. Transition and transplantation are adaptation mechanisms for local developments of the two models to participate in global economies with industrial division and labour division, and also for the two models to continuously further contribute to China's nationwide market transition and economic development. 展开更多
关键词 TRANSITION TRANSPLANTATION "South Jiangsu Model" "WenzhouModel" local development
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