基于基尼系数空间分解的江苏省经济发展差异分析     

王惊雷  李在军 《地域研究与开发》2017,36(3)

不平等性是区域研究的重点,空间集中作为衡量不平等性的重要手段,是非空间与空间属性的二维统一体。传统的研究仅仅关注了全局非空间上的不均衡性,而忽略了地理空间上的集聚特点,往往不利于识别地理属性的集中特点。引进基尼系数的空间分解这一概念,通过对其空间随机分布性的零假设采用蒙特卡罗方法进行检验,从而判定其分解形式是否内生衡量区域不平等与空间自相关的特性。以1978—2015年江苏省区域经济发展差异的演变进行案例分析,通过蒙特卡罗99次随机模拟检验后,将分解的非邻居项与Moran’s I值进行显著性检验,结果进一步证实了这一分解的有效性与简洁性,表明空间基尼系数可内生测度空间的集聚性与非空间的差异性。  相似文献   

梅雨锋云系内对流回波与层状回波的研究   总被引：4，自引：4，他引：4  

张卫平  郎需兴等 《气象科学》2001,21(1):9-18

本文利用1998年“淮河流域能量与水分循环试验（HUBEX）”所获得的大量雷达资料及遥测雨量计计资料，细致分析了淮河流域梅雨锋云系的结构，根据层状云和对流云在雷达回波图中的不同特征，本文提出用松散系数D（反映云系结构疏松程度）来区分大范围云带中的降水云类型，同529张PPI资料统计表明，若D＞0．17则说明该区结构松散，降水属于层状云降水，D≤0．17时，云区是对流性降水，由于梅雨锋水具有明显的不均匀结构特征，其中锋面对流云带和强下挂回波带是造成强降水的主要原因，在用地面雨量资料和雷达资料对地面降水进行短时（3小时以内）校正时，针对不同的降水类型采用不同的Z－R关系比用同一种Z－R关系的校正精度大约提高4％。  相似文献   

An Actively Controlled Wind Tunnel And Its Application To The Reproduction Of The Atmospheric Boundary Layer     

Cao Shuyang  Akira Nishi  Kimitaka Hirano  Shigehira Ozono  Hiromori Miyagi  Hiromori Kikugawa  Yuji Matsuda  Yasuo Wakasugi 《Boundary-Layer Meteorology》2001,101(1):61-76

An actively controlled wind tunnel equipped with multiple fansand airfoils has been developed, mainly for the purpose of reproducing the atmospheric boundary layer (ABL) for wind engineering applications. Various fluctuating flows can be achieved in this wind tunnel by altering the input data of the fans and airfoils through computer control. In this study, the ABL is physically simulated in this wind tunnel, and particular attention ispaid to the simulation of the profile of Reynolds stress. The method of generating the fluctuating flow and the experimental results of reproducing the ABL are presented. As the results show, the spatial distribution of Reynolds stress is satisfactorily simulated, and the profiles of other statisticalturbulent parameters, such as mean velocity, turbulent intensity, integral scale and power spectrum are successfully reproduced simultaneously.  相似文献   

A NUMERICAL SIMULATION OF THE EFFECT ON CHINESE REGIONAL CLIMATE DUE TO SEASONAL VARIATION OF LAND SURFACE PARAMETERS(PART I)     

SUN Jian  LI Weiliang  ZHOU Xiuji 《Acta Meteorologica Sinica》2001,15(2):129-143

Sensitivity experiment is an important method to study the effect on regional climate due toseasonal variation of land surface parameters.Using China Regional Climate Model(CRCM)nested in CCM1.we first simulate Chinese regional climate,then two numerical sensitivityexperiments on the effect of vegetation and roughness length are made.The results show that:(1)If the vegetation is replaced with the monthly data of 1997.precipitation and land-surfacetemperature are both changed clearly,precipitation decreases and land surface temperatureincreases,but there is no regional correspondence between these changes.And the results aremuch better than the results when climate average vegetation was used in the CRCM.(2)If theroughness length is replaced with the monthly data of 1997,there is significant change on landsurface temperature,and there is very good regional correspondence between these changes.Butthe effect on precipitation is very small.  相似文献   

20世纪全球增暖最显著的区域   总被引：6，自引：0，他引：6  

Zeng Zhaomei  Yan Zhongwei  Ye Duzheng 《大气科学进展》2001,18(4):481-496

Having analyzed a global grid temperature anomaly data set and some sea level pressure data during the last century, we found the following facts. Firstly, the annual temperature change with a warming trend of about 0.6℃/100 years in the tropical area over Indian to the western Pacific Oceans was most closely correlated to the global mean change. Therefore, the temperature change in this area might serve as an indicator of global mean change at annual and longer time scales. Secondly, a cooling of about -0.3℃ / 100 years occurred over the northern Atlantic. Thirdly, a two-wave pattern of temperature change, warming over northern Asia and northwestern America and cooling over the northern Atlantic and the northern Pacific, occurred during the last half century linked to strengthening westerlies over the northern Atlantic and the weakening Siberian High. Fourthly, a remarkable seasonal difference occurred over the Eurasian continent, with cooling (warming) in winter (summer) during 1896-1945, and warming (cooling) in winter (summer) during 1946-1995. The corresponding variations of the North Atlantic Oscillation and the Southern Oscillation were also discussed.  相似文献   

卫星遥感结合地面资料对区域表面动量粗糙度的估算   总被引：10，自引：0，他引：10  

贾立  王介民  Massimo Menenti 《大气科学》1999,23(5):632-640

利用地面湍流观测资料估算了黑河实验区几个典型下垫面的局地地表动量粗糙度，与卫星观测Landsat TM资料相结合得到了由标准化差值植被指数(NDVI)计算地表动量粗糙度的经验关系式，进而估算了实验区夏季和近冬季的地表粗糙度的区域分布，并对所得关系式进行了合理性检验。  相似文献   

VARIATION OF WATER DEPTH AND MANNING''''S ROUGHNESS n DUE TO RIVER MEANDERING IN SUBCRITICAL FLOW REGIME     

Chin-Kun HUANG  Chang-Ling LIU Assistant professor  Department of Hydraulics & Ocean Engineering  National Cheng Kung University  Tainan    Taiwan  China Professor  Department of Hydraulics & Ocean Engineering  National Cheng Kung University  Tai 《国际泥沙研究》2001,16(1)

I INTRODUCTIONThe flow in a channel will be retarded by several factors, including surface roughness, vegetation,channel irregUlarity, channel alignment, and obstrUctions. The surface roughness is often only consideredin selecting the roughness coefficient, such as Manning's n. However, in case of a meandering channel,the channe1 alignment is sometimes more dominant than the surface roughness. The meandering ofnatural streams may increase the Manning's n as high as 30% (Chow, l969). Sc…  相似文献   

土壤水溶性有机物吸着系数及其影响因素研究   总被引：1，自引：1，他引：1  

张甲珅  曹军  陶澍 《地理科学》2001,21(5):423-427

测定了中国中、东部地区17种土类45个表土样品中水溶性有机物的吸着系数、分子量分布、腐殖酸含量、粘土含量以及土壤pH值，分析了水溶性有机物吸着系数的分布、地域分异和影响吸着系数的主要因素。结果表明，中国中、东部主要天然土壤类型A层水溶性有机物吸着系数在0．0014－0．0284L/g，中位数为0．0062L/g；研究区吸着系数具有自北向南和自西向东递降的一般趋势。水热的地域分异是影响土壤A层Ks地域分异的根本因素，pH和WSOC分子量分布是直接影响Ks值的两个重要因素。  相似文献   

A new investigation on drift of base-line value in geomagnetic observation     

杨冬梅  高玉芬  赵永芬  黄蔚北 《地震学报(英文版)》1997,10(4):507-512

Ａｎｅｗｉｎｖｅｓｔｉｇａｔｉｏｎｏｎｄｒｉｆｔｏｆｂａｓｅ┐ｌｉｎｅｖａｌｕｅｉｎｇｅｏｍａｇｎｅｔｉｃｏｂｓｅｒｖａｔｉｏｎＤＯＮＧ－ＭＥＩＹＡＮＧ（杨冬梅）ＹＵ－ＦＥＮＧＡＯ（高玉芬）ＹＯＮＧ－ＦＥＮＺＨＡＯ（赵永芬）ＷＥＩ－ＢＥＩＨＵＡＮＧ...  相似文献   

THE CHARACTERISTICS OF TURBULENT TRANSPORT IN THE SURFACE LAYER OVER EASTERN TIBET DURING SUMMER 1986          下载免费PDF全文

Ma Shufen 《Acta Meteorologica Sinica》1991,5(4):456-464

The turbulent fluxes for sensible and latent heat and momentum are computed and analyses are carried outabout the factors in terms of the fluxes,with the profile methods,based on the data from the Tibetan(Xi-zang)Plateau Meteorological Experiment in 1986(TIPMEX-86).It is shown that the fluxes of various kindshave evident diurnal variation,and each decade mean diurnal variation is quite different from others.Thesensible heat flux is about 2/3 less in July than in June.The results indicate that the averaged drag coefficient,C_d,and the averaged bulk transfer coefficient of sensible heat,C_h,are 0.0052 and 0.0075 respectively,for theperiod 13 to 28 in June for Nagqu.But for Lhasa,the mean C_d is 0.0056,and the mean C_h is 0.0085,for the period of June 11 to July 20.It is found that C_d and C_h are not only the function of wind velocity,but also influenced by stability conditions and wind and temperature gradients.  相似文献