探讨《协议出让国有土地使用权规定》中四个容易混淆的问题

2003年6月11日,国土资源部发布了《协议出让国有土地使用权规定》(以下简称《规定》),并于2003年8月1日起施行。在实际操作中,如何确定出让金?不少地方存在着模糊认识,有的认为《规定》出让金抬高了,有的认为出让金降低了,出现了许多错误的认识。纠正这些错误的认识直接关系到是否依法出让国有土地使用权。我认为很有必要关注以下容易混淆的四个问题: 出让价是指国家在出让国有土地过程中发生的各种土地使用费的总和,通常称“毛出让”。出让金是指国家作为土地所有者向受让者收取的一定年限的土地使用费中纯收入部分,通常称“净出让”。 …     

应用MAPGIS制作农级别基准地价图的方法探讨

本文从农级别基准地价图编制的目的和原则入手，详细介绍了用MAPGIS软件编制农级别基准地价图的方法。     

特殊条件下滑坡监测网的优化设计

滑坡是一种常见的地质灾害，对其监测、预报越来越受到人们的重视，但在一些特殊地区，特别是在一些山区，受地形和通视条件的影响，滑坡监测网的布设受到很大限制。这样就需对所布设的监测网进行质量分析和优化设计。从经济指标考虑，采用常规监测网与基准网的布设，有成熟的作业规程，但是由于区域条件的限制，测角监测网无法满足规范中对交会角条件的要求，另外鉴于高精度的测距仪测边精度很高，故该监测网观测方案首先采用测边交会。选取网中图形条件最差的两个点，对其在该方案下的点位精度、网形的内外可靠性以及灵敏度进行了理论分析和实际计算，根据计算结果显示个别边可靠性差的情况，分析了其原因。综合考虑经济指标和质量指标，提出了对观测方案的优化措施，在网形的关键部位加测角度，测角精度为2″．5，改进后的方案既保证了必要的点位精度和灵敏度，且网形的可靠性得到明显提高，对监测网进行优化设计是必要的和有效的。     

The Statistical Analysis of Migration of Strong Earthquakes-Taking the North China Region asan Example

The migration of strong earthquakes is an important research topic because the migration phenomena reflect partly the seismic mechanism and involve the prediction of tendency of seismic activity. Research on migration of strong earthquakes has mostly focused on finding the phenomena. Some attempts on getting regularity were comparatively subjective. This paper suggests that there should be indices of migration in earthquake dataset and the indexes should have statistical meaning if there is regularity in the migration of strong earthquakes. In this study, three derivative attributes of migration, i.e., migration orientation, migration distance and migration time interval, were statistically analyzed. Results in the North China region show that the migration of strong earthquakes has statistical meaning. There is a dominant migration orientation (W by S to E by N), a dominant distance ( ≤ 100kin and on the confines of 300 ～ 700km), and a dominant time interval ( ≤ la and on the confines of 3 - 4a). The results also show that the migration will differ slightly with different magnitude range or earthquake activity phase.     

利用高光谱数据进行植被生化成分反演方法研究

高光谱数据包含着丰富光谱信息,能够定量地分析物质成分^[1]。由高光谱数据,可以运用多元逐步线性回归方法反演植被生化组分含量,从而达到监测植被生长状况的目的^[2]。本文具体介绍了多元逐步线性回归方法,及其在氮、木质素和纤维素含量估算中的应用。     

成都市冬季重污染日气象条件成因分析及预报

本文通过对成都10个重污染日进行天气学分析,将污染浓度与气象要素进行聚类、研究了重污染日形成原因及污染浓度与气象要素的关系。在此基础上,建立了SO_2、TSP日平均浓度分级预报方程。     

MONITORING THE DIFFUSION OF SUSPENDED SEDIMENTS AND STABILITY OF TIDAL RADIAL SAND RIDGES AREA USING MULTI-SATELLITE REMOTE SENSING DATA

Nine Landsat TM tapes and images and MSS images, 10 NOAA tapes and images and 1 SAR image from 1973 to 1997 were used to analyse the diffusion of suspended sediments and the change of tidal radial sand ridges in the northern part of the Changjiang River delta, the South Yellow Sea. The results showed that the diffusion of suspended sediments was controlled by the tide, net current, and submarine topography in this area. The distribution of suspended sediments had close relationship with thesubmarine topography. The old Huanghe River delta and the Changjiang River comprise the main sediment supply for the formation of radial sand ridges, whose evolution can be divided into three stages since the Huangbe River changed its course and flowed northward into the Bohai Sea.