多边形直角房屋外墙体一半面积计算模型的研究

在不动产测量中,计算外墙体一半面积的数学模型,只有针对四边形直角房屋的数学模型,而对于多边形直角房屋计算外墙体一半面积的数学模型还没有发现,这给分析多边形直角房屋外墙体一半面积的精度带来困难,本文通过研究分析,推导出了多边形直角房屋外墙体一半面积的数学模型,供研究面积精度者参考。     

Background deduction of the Chang’E-1 gamma-ray spectrometer data

Gamma-ray spectrometer(GRS) is used to detect the elemental abundances and distributions on the lunar surface.To derive the elemental abundances,it is vital to acquire background gamma rays except lunar gamma rays.So GRS would observe background spectra in the course of earth-moon transfer on schedule.But in fact,GRS was not switched on in the course of flying toward the moon.After the CE-1 probe finished one-year mission,GRS car-ried out a test on background data on November 21?22,2008.The authors did conduct research on the methods of background deduction using 2105 hours of usable gamma-ray spectra acquired at the 200-km orbital height by the GRS and more than 5 hours of gamma-ray spectra acquired in the GRS background test.The final research results showed that the method of deducting the background using the minimum counts in the CE-1 GRS pixels is optimal for the elements,U,K and Th.The method applies to such a case that the elemental abundances in the pixel with the minimum counting rate are 0 μg/g and the continuum background counts are constant over the Moon.Based on the method of background deduction,the full energy peak counts of U,K,and Th are calculated.     

On the Object and Subject of Geography

Danish Journal of Geography 96: 110–117, 1996.

Basic theoretical problems in geography are discussed. The development of the subject is seen primarily as a result of the division of labour among sciences. The subject's contextual dimension is made up of the different forces that influence the discipline, and the theoretical dimension comprises the method of presentation, the object and the metatheory. The subject can not be defined in the proper sense of the word, but its object can: the ecumene or the human habitat. An approach is discussed for the presentation (theoretical development) of geography by the means of dialectical method, using the labour as the basic category.     

中国创意产业区理论研究的进展与问题

创意产业在中国发起于21世纪初的东部大都市,系统收集国内建筑学、产业经济学、人文地理学、区域经济学等学科的创意园区相关研究成果,评述中国自21世纪初创意产业兴起以来的基本概念研究、创意园区成长模式及机制、创意园区空间组织与园区规划、创意园与城市更新、创意园内部空间的研究进展。认为中国大城市内城产业升级与城市再生为创意园区的诞生与发展提供了历史契机。通过近8年努力,国内创意园区研究①已初步形成以创意园区成长模式与机理、创意园区规划建设、创意园区与城市更新为主的研究方向;②研究方法形成了以实证主义为主流的哲学基础;③研究队伍呈现以城市规划学、人文地理学等学科为主的综合交叉。同时,综述认为：中国对创意产业区相关概念认识不清,未能将集群的内核与创意产业的核心有机融合;其次是对于创意产业区的研究应坚持从微观的创意产业的某一类型,甚至是其一项目为分析单元,从制度、经济、文化等宏观方面诠释产业区内核的组织与发育过程;再次是中国创意产业区研究必须从创意经济和＂全球性—地方性＂博弈视野,探索创意产业区形成与演化的生境和其对城市发展—空间规划的空间效应（也即创意空间的生长）及城市响应策略研究。     

基于汶川地震序列震源机制解对龙门山地区构造变形模式的初步探讨

本文采用理论震源机制解的分析方法,以汶川地震序列震源机制解为约束,探讨龙门山地区构造变形模式及其与汶川地震序列的关系.通过有限元模拟,计算了龙门山地区不同构造变形模式下的构造应力场,得到了理论震源机制解,并与汶川地震序列实际震源机制解进行对比分析,初步探讨了该区构造变形模式对汶川地震序列的影响.结果显示,在龙门山地区,青藏高原内深部构造变形快于地表的构造变形模式下,区域构造应力场对应的理论震源机制解与汶川地震序列震源机制解的相符程度较高.这种一致性可能表明:(1)青藏高原内部深部构造变形快于地表,是龙门山地区比较合理的构造模式;(2)构造应力场是影响汶川地震序列震源机制的重要力学因素.     

高精度磁测在四川金河-树河地区1:5万矿调中的应用

在四川省盐源县金河—树河地区开展了1︰5万高精度磁测,对磁测数据采用向上延拓、化极、小波断裂分析、2.5D人机交互反演等方法,进而分析不同磁场区的磁性特征,对区内的铁矿体、断裂构造和岩浆岩的磁性特征进行阐述和解释,提出了4个成矿远景区,认为区内依然存在不同类型铁矿资源的找矿潜力。     

岩浆去气作用碳硫同位素效应

 根据开放体系条件下的瑞利分馏原理,并考虑岩浆中可能溶解的合碳和含硫组分,从理论上定量模式了岩浆去气作用对火成岩碳、硫同位素组成的影响。结果表明,岩浆CO₂去气作用能够导致岩石中碳酸盐显着亏损¹³C,其δ¹³C值能够从原始-5‰变化到-20‰(PDB);岩浆CH₄去气作用则导致岩石中碳酸盐相对富集¹³C,其δ¹³C值能够从原始-5‰变化到+4‰。岩浆SO₂去气作用可以导致岩石中硫化物显着亏损³⁴S,其δ³⁴S值能够从0‰变化到-8‰(CDT);岩浆H₂S去气作用则导致岩石中的硫化物相对富集4S,其δ³⁴S值能够从0‰变化到+6‰。因此,除源岩原始同位素不均一性和地壳物质混染能引起火成岩的碳、硫同位素组成发生较大变化外,岩浆去气作用也是重要原因之一。     

发展地球科学大体系理论开拓人类文明的新前景

从人类发展需要及科学理论趋势出发论述地球科学各门类的大体系综合理论跃迁的观点。提出以地球深源岩浆热动力为主链的岩石圈、水圈、大气圈和生态环境圈的总体物质——热力运动高统帅性理论。展望新的高技术观(监)测系统。     

APPLICABILITY OF THE BEND DEVELOPMENT THEORY IN NATURAL ALLUVIAL RIVERS

1 INTRODUCTION Meanders are the fundamental planform of alluvial rivers and bank erosion in the meander bends is a common feature. In most of the practical cases, the eroded material from the outer bank deposits along the inner bank to develop sand bars. Very often, bank erosion is drastic and channel width increases in an order of several hundred meter per year at some reaches of large scale meandering rivers, for example, the Ganges river inside Bangladesh, as noticed by Muramoto and…