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?????????2013????????????6.6?????????????300 km??Χ??6???????α???2009-01-01??2013-07-21??????????26????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????α?????????????????????????н?????????????????????????Щ?仯?????????6.6??????????????????     

Population geography in China since the 1980s: Forging the links between population studies and human geography

This paper reviews the progress of population geography in China since the 1980s. The review results suggest that contrary to the common perception of its invisibility and marginalized status in the field, tremendous progress has been made in population geography in China since the 1980s. Population geographers have made significant contribution to the understanding of a wide range of population issues from geographical perspectives, including migration, urbanization, population distribution, the relationships between population, environment and resources, aging, marriage patterns, and migrants’ crimes, although such contribution often did not appear in the geographical circle. Furthermore, population geographers have played an indispensable role in revitalizing population studies in China and forging its links to human geography, occupying an important position in this multi-disciplinary field. Population geographers’ contribution to the areas of migration and urbanization research has been particularly significant, reflected in their leading roles in these areas’ research. The paper demonstrates that as latecomers in the field after more than 20 years of isolation, population geographers in China have gone through a process of catching up and increasing engagement with developments in social sciences and increasing interaction with social scientists since the 1980s, and have benefited greatly from it; however, there is a tendency for population geography to be increasingly alienated from the main stream human geography, a phenomenon similar to but not exactly the same as Anglo-American geography in the late 1990s and early 2000s. The paper argues that population geography is only half way in the course to forge the links between population studies and human geography, and it needs to return to geographical sciences to strike a healthy balance between the field of population studies and that of human geography, and promote its further development in a multi-disciplinary field.     

Separation Problem in Satellite Gravimetry

The problem of separating gravitation from inertia is discussed in very general sense, and the conclusion is positive: man can separate gravitation from inertia, if various observation techniques are applied for. The accelerometer's position problem in satellite gravimetry is investigated, and the additional acceleration effect due to the position error of an instrument as well as the difference between the mass center and the gravity center is explored.     

东明县农村宅基地情况调研报告

东明县现有389个行政村,65.47万农村人口,17.9万户住户,农村居民点用地面积834.85 hm2,占全县土地总面积的9.13%,占建设用地面积的78%.     

穆珠朗玛峰地区土壤中稀土元素的含量和分布

本文论述了珠穆朗玛峯地区土壤中稀土元素的含量,以及它们在土壤中的分布模式,并发现土壤中稀土元素的含量水平在很大程度上受土壤母质的制约。     

南京北郊低空污染气象条件若干特征

本文根据南京北郊大厂镇地区实测低空温风资料的统计分析,揭露了该区低空逆温、混合层顶高度、风向、风速、大气稳定度等的铅直分布规律和局地环流的某些特征。     

土星卫星的精密定轨方案

由于星际探测事业的发展,对土星卫星的定位精度要求愈来愈高,经典的分析法定轨方法已难以适应,在当今计算技术条件高度发展的背景下,本文给出了土星卫星的数值法定轨方案,采用了土星卫星运动的高精度力学模型,并运用１８７４－１９８９这１００多年间的观测资料,引用现代最小二乘估计,对土星卫生进行精密定轨。该方案可以在引用同样的力学模型的前提下,对土星各颗卫星进行定轨,亦可同时进行多颗卫星的定轨。相应的软件比较     

Preliminary studies on the role of protozoa in the food web of Donghu Lake

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?????????????InSAR?????е????????????????????ζ??α??????????????????????????????????????о?????????????????ALOS PALSAR???????????????????α????????????????????????ALOS PALSAR?????????3??5 m???????е???????????￡??α?????????????????????о?????????????????С?????????????????????DEM?????????￡?SRTM DEM????????ALOS PALSAR??????????1cm???α???????????????????С??400 m??