高分辨率卫星遥感影像数字化更新县级土地利用基础图件的试验研究

高分辨率卫星的出现和商业化使快速更新大比例尺土地利用基础图件成为可能。本文采用实证研究的方法,分别在北京市房山区和吉林省安图县建立了两个试验区,形成了一套基于遥感的县级土地利用基础图件数字化更新的技术流程,并对这一技术流程和方法进行了验证。

土地利用基础图件数据库建库与更新技术研究

新一轮国土资源大调查已经于1999年启动,它是一项跨世纪的基础性、公益性、战略性的宏伟工程.土地利用基础图件的数据库建设是其中的一项重要内容.本文结合包头市土地利用基础图件数据库建库和更新的实际工作,对土地利用基础图件数据库建库和更新的技术流程、技术方法以及存在的问题进行了探讨.

大规模新能源电力安全高效利用基础问题

电能对于当今社会的意义不言而喻。大规模地开发利用新能源,使其为电力系统服务,能够为我国的经济发展做出巨大贡献。文章通过对新能源电力的基础问题进行了分析,提出了一些应用策略,希望可以为广大研究者提供参考。

关于大规模新能源电力安全高效利用基础问题

在现代社会发展过程中,电能可以说是不可或缺的能源形式之一,但是由于传统电能的生产方式对于环境的污染问题较为严重,因此迫切需要寻找新的能源形式支撑新能源的大规模开发和利用,成为我国电力系统未来发展的主要方向,将影响我国今后经济发展的走向。因此,本文重点分析关于新能源电力基础的相关问题,通过总结利用基础问题的方式,提出有效的改进意见,希望对该领域的相关研究发展有所帮助。

市政工程中的基础再利用研究

在市政工程中,基础再利用具有巨大的潜力,然而其优缺点需要谨慎考虑。优势包括节约成本和资源、减少环境影响等,但同时也需面对基础结构适配性、承载能力等方面的挑战。因此,在进行基础再利用时,必须充分考虑现有基础的类型、状况和承载能力,以及与新建筑的适配性。具体方法包括对基础进行调查评估、承载能力评估方案设计与结构设计,并进行施工、监测和维护。通过这些步骤,可以实现对现有基础结构的有效再利用,为市政工程提供经济、环保和可持续的解决方案。同时,记录当前设计和施工过程的详细信息对未来基础再利用的成功至关重要。

塔吊基础利用新建结构基础的探索

本文根据项目改建特点规划布置塔吊,对结构内置塔吊利用新建结构基础作为塔吊基础的方法进行设计计算塔吊基础,降低了施工成本,为类似内置塔吊利用新建结构的方案提供宝贵经验。

《中国利用外资基础知识》出版

《中国利用外资基础知识》一书已于今年5月由中共中央党校出版社和中国对外经济贸易出版社联合出版,这是继《什么是社会主义市场经济》和《现代科学技术基础知识》出版之后,江泽民总书记倡议编写的第三本干部学习读本,旨在帮助各级领导干部提高现代知识水平,提高领导经济建设的能力。

总结经验，开创利用外资工作的新局面──《中国利用外资基础知识》序

总结经验，开创利用外资工作的新局面──《中国利用外资基础知识》序江泽民我倡议编写的三本书，《什么是社会主义市场经济》、《现代科学技术基础知识》，分别由马洪、宋健同志主编，已经出版了；由李岚清同志主编的《中国利用外资基础知识》，也即将问世。这三本书的出...

基于GIS系统的土地利用数据建库模式研究

结合江苏省土地利用基础图件与数据更新调查,从技术路线、作业方法、数据库内容、数据库平台、数据组织、处理和存储等方面分别探讨了建设城乡一体化地籍数据库、建设大于1:1万比例尺的土地利用更新调查数据库及建设1:1万比例尺的土地利用现状数据库等3种基于GIS技术的土地利用数据建库模式;比较了3种模式的异同,并对建立土地利用数据库进行了较为深入的研究。

SHP文件格式的研究与应用

在全国第二次土地详查中,土地利用基础图件大部分是以SHP文件格式存储的,因此在对土地利用基础图件进行更新的过程中,首要的问题是对SHP文件的访问。本文以解决这一问题为目标,以SHP文件中常用的多边形元素为例,对SHP文件中二进制格式的元素表示方法加以阐述,并以程序实现的方式对资料进行了访问,最终在项目中得到了充分的应用。

基于GIS的人口反演及空间归位初探

人口数据是城乡规划管理的基础。现行人口数据因统计部门、口径、方式的不同而有较大差异,特别是人口数据不能在空间上展现,难以满足城乡规划及管理的相关需求。在GIS支持下,根据一定空间范围内的基础设施利用量与人口数量成正比的关系,反演城市人口和研究其空间分布特征,对城乡规划及城市管理具有重要作用。

Joint Power Allocation and Mode Selection for D2D Communications with Imperfect CSI

Device-to-device(D2D) communications can be underlaid with a cellular infrastructure to increase resource utilization, improve user throughput and save battery energy. In such networks, power allocation and mode selection are crucial problems. To address the joint optimization of power and mode selection under imperfect CSI, we propose an optimal, energy-aware joint power allocation and mode selection(JPAMS) scheme. First, we derive the closed-form solution for the power minimization for both D2 D and cellular links while satisfying different quality of service(Qo S) constraints. Second, we address the mode selection problem in presence of imperfect CSI, based on the derived power allocation. Moreover, the theoretical analysis and simulation results are presented to evaluate the proposed scheme for the D2 D communications.

Regional Differences of China′s Urban Expansion from Late 20th to Early 21st Century Based on Remote Sensing Information

This study investigated the regional differences of China′s urban land expansion from the late 1980s to the year of 2008, based on the spatio-temporal analysis of CLCD (China′s land cover/land use database) datasets which were mainly produced from remote sensing imagery data. A newly defined urbanization level index (UI), based on urban land area, is proposed to describe Chinese urban expansion process at 1 kilometer, provincial, regional, and na-tional scales, together with the absolute urban expansion index (UEa) and the relative urbanization expansion index (UEr). The results indicate that the percentages of total land area occupied by urban in the late 1980s, 1995, 2000, 2005, and 2008 were approximately 0.25%, 0.32%, 0.33%, 0.43% and 0.52% of China′s total land area, respectively. Between the late 1980s and 2008, the total urban expansion in the mainland of China was 2.645 × 104 km2, resulting in an annual urban expansion area of about 1322.7 km2/yr, with the UEr of 111.9%. This study also finds that there has been an obvious spatial gradient of urbanization ratio running from the east coast to the west inland, and the urbanization gaps among different regions have persisted over the past two decades. The study also reveals obvious temporal varia-tions of the urbanization rates. There was very little urban growth during the period of 1995-2000 due to the governmental policy factors.

A Novel Optical Burst Mesh Network with Optical Time Slot Interchange at Source Nodes

In this paper, we propose an optical burst network architecture supporting the ge- netic mesh topology. The intermediate node architecture of the mesh network can be the same with current wavelength switching Wave- length Division Multiplexing （WDM） net- works, and thus can reuse existing deployed infrastructure. We employ a novel Optical Time Slot Interchange （OTSI） at the source nodes for the first time to mitigate the burst conten- tion and to increase the bandwidth utilization. Time- and wavelength-domain reuse in the OTSI significantly saves optical components and red- uces blocking probability.

A multi-path routing algorithm of LEO satellite networks based on an improved ant colony system

Geography rectangle is used to reduce signaling overhead of the LEO satellite networks.Moreover,a multi-path routing algorithm based on an improved ant colony system(MPRA-AC) is proposed.Matrix indicating the importance of the link between satellites is introduced into MPRA-AC in order to find the optimal path more quickly.Simulation results show that MPRA-AC reduces the number of iterations to achieve a satisfactory solution.At the same time,the packet delivery ratio of LEO satellite networks when running MPRA-AC and DSR-LSN(dynamic source routing algorithm for LEO satellite networks) is compared.The packet delivery ratio is about 7.9%lower when running DSR-LSN.Moreover,because of the mechanism of active load balancing of MPRA-AC,simulation results show that MPRA-AC outperforms DSR-LSN in link utilization when data packets are transmitted in the networks.

Utilization Pattern of Olympic Parks and Its Application in Beijing

With great promotion of mega-events in both quantities and qualities in China, the research of Mega-events has been increased. As a global hallmark event, the Olympics, with their enormous scale, universal attraction for the media and tremendous political significance, have increasingly drawn attention from the researchers. It is obvious that Beijing has been greatly impacted by the 2008 Olympic Games as the host. The event aroused close attention of researchers, especially the problem how the Olympic stadiums and facilities can be utilized after Olympic Games. The paper employed 3 methods to conduct a survey, that is, sending questionnaires to tourists, in- terviewing with government officers, and collecting information about former Olympic Parks from Intemet and lit- eratures. The utilization of former Olympic Parks after Games was summarized and some experiences were refined. Besides, 3 main bodies including government, business operators and visitors which formed basic driving forces to influence the park＇s use were analyzed. At the same time, the paper believes that 3 topics affect the park＇s utilization involving ＇prepare to use＇, ~how to use it＇ and ~how to manage it＇, and Beijing Olympic Park can also follow that thinking and reference in the ft^her practices. Based on it, suggestions are given that Beijing Olympic Park can be planned spatially from 3 layers, the point, line and area, based on their function and infrastructure in the Games, and the area would be shaped as a new urban center with multi-functions while Mega-events and sport events are still the main content of the park.

Evaluation of Energy Use and Environmental Efficiency in China＇s A statistical analysis by province based on the SBM model

The world today is .faced with the critical challenge of developing industries .for both high technological efficiency and possibly less impact on resources and the environment. This paper employs the Slacks-based measure （SBM） to conduct an empirical analysis of China＇s industrial environmental efficiency between 1998 and 2008. We.found a slight decline in SBM nationwide due to the combined effects of resource^environmental constraint as well as technological progress. From a static perspective, there is a clear disparity in coordination among regions, particularly between western regions and eastern coastal regions. From a dynamic perspective, there is limited change in the coordination of industries with natural resources and the environment in coastal and central regions, but a marked decline in the northeast and western regions. This contrast can be traced to the .following reasons： the capital-intensive structure of the economy and the high proportion of large industrial enterprises that restrict the improvement of SBM environmental efficiency. Higher living standards, indigenous innovation, acquisition of new technologies, and foreign direct investment will be conducive to industries＇synchronous development with natural resources and the environment.

Watershed Prioritization of Palar Sub-watershed Based on the Morphometric and Land Use Analysis

Morphometric analysis is an indispensable tool for hydrological investigation that involves the development and management of drainage basin. This study characterizes the micro watersheds in the Palar sub-watershed using morphometric analysis and assesses its risk by land use and land cover features in a particular micro watershed. Palar sub-watershed is divided into 6 micro watersheds for prioritization based on morphometric and land use analysis. Several morphometric parameters （linear, shape and relief） are determined from the drainage map; ranks are assigned based on their capacity to induce erodability and degradation. Final ranking is based on the composite index calculated from the sum of the ranks of each morphometric parameter. Morphometric analysis reveals micro watersheds 5 and 6 as most susceptible and 2 and 3 as low susceptible. Land use is mapped using IRS ID LISS III satellite data. The risk in terms of watershed degradation involved to each micro watershed is based on the ranks of each land use feature, obtained from a similar composite index as that of morphometric analysis. Land use analysis shows that micro watersheds 2 and 4 fall under high priority category while 5 and 6 under low priority category. Integration of the morphometric and land use analysis shows that only microwatershed 1 falls under the same category in both analyses. Control measures are suggested to contain degradation depending on its specific land use pattern and morphometric features. This study ean be used to prepare a comprehensive watershed plan for the development or for planning resource conservation strategies, by integrating land use features with the drainage characteristics of the region, in particular for a hill ecosystem as the prioritization is at micro level.

Level of Independence in Georgia Throughout the 14th Century

In 1329-1334, George the Brilliant took advantage of the situation created in the llkhanate, eliminated his political opponents and restored the territorial integrity of Georgia. He created a solid legal basis for the country and regulated the ecclesiastic area. He was in West Georgia in 1329-1332/1333. The llkhanid coin was not minted in Georgia during that period; yet, soon the king of Georgia, which had already been united by that time, restored relations with llkhanids and returned to Tbilisi, which implied making the already united Georgia subject to Mongols. Ilkhanid coins and later, coins of Chobanids, the Golden Horde and Jalayirids circulated during the reign of George the Brdhant. In 1338-1339 George the Brilliant conquered Ossetia and Ilkhanid coins were disseminated on the territory of the Golden Horde after that. Formally, Georgia remained under the control of Ilkhanids, which was replaced by Chobanids in 1338 and the governors of the Golden Horde in 757/1356; and in parallel and afterwards by Jalayirids, which is evidenced by written sources as well as numismatic data; Despite formal dependence on the foreign power, which is evidenced by the deployment of 10,000 troops at the border of Georgia as well, the country enjoyed a rather wide internal autonomy. Participation of George the Brilliant in sending envoys for the purpose of the redemption of the Jvari （Cross） Monastery in Palestine in 1316/7, 1320 cannot be assumed. It seems that in those years envoys were sent by Constantine, the king of West Georgia. All the above do not diminish the merits of George V to the Georgian nation and his historic role in terms of the political unification of the country, the creation of a legal basis for it and the regulation of ecclesiastic affairs--the accomplishments of the king, who deservedly bears the name ＂the Brilliant＂.