3D computer simulation for lignification of ancient Chinese timber buildings

A pioneer research work was carried out by investigators engaged in surveying and mapping for describing ancient Chinese timber buildings by 3D frame graphs with a computer. Users can know the structural layers and the assembly process of these buildings if the frame graphs are processed further with a computer model. This can be implemented by computer simulation technique. This technique display the raw data on the screen of a computer and interactively manage them by combining technologies from computer graphics and image processing, multi-media technology, artificial intelligence, highly parallel real-time computation technique and human behavior science. This paper presents the implementing procedure of lignification simulation for large-sized wooden buildings as well as 3D dynamic assembly of these buildings under the 3DS MAX environment. The results from computer simulation are also shown in the paper.     

A technique of digital surface model generation

It is usually a time-consuming process to real-time set up 3D digital surface model(DSM) of an object with complex surface. On the basis of the architectural survey project of “Chilin Nunnery Reconstruction”, this paper investigates an easy and feasible way, that is, on project site, applying digital close range photogrammetry and CAD technique to establish the DSM for simulating ancient architectures with complex surface. The method has been proved very effective in practice.     

邯郸市电线积冰的气候特征及气象条件分析

利用邯郸市气象观测站1981-2008年的电线积冰观测数据资料,对邯郸市电线积冰的气候特征进行了统计分析,结果表明:电线积冰日数呈减少趋势;电线积冰均发生在采暖期内,其中1月份最多;邯郸电线积冰多为雾凇造成,具有重量轻、危害小的特点.产生电线积冰时需同时具备低温和充足水汽两个条件.邯郸发生电线积冰的高空环流形势分平直环流型、低涡型、两槽一脊型和阻塞高压型等4种类型.     

2013 年春季华南师范大学石牌校区大气冷凝水的化学特征与来源

通过人工制冷的方法收集2013 年华南师范大学石牌校区大气冷凝水52 个样品,对其进行pH 值和阴阳离子分析。结果表明：2013 年春季石牌校区绝大多数冷凝水样品的pH 值分布范围为5.00~6.47,平均值为5.97,已不属于酸雨。冷凝水的阴阳离子总质量浓度（TDS）介于57.87~484.38 μeq/L 之间,平均值为154.53 μeq/L;各离子质量浓度高低依次为2-4 SO ＞Ca2+＞ -3 NO ＞Na+＞Cl-＞NO2-＞Mg2+≈K+＞F-。石牌校区冷凝水的这种离子质量浓度分布特征显示：其清洁程度较优于2011 年春季该校区和同期上海大气冷凝水,而较差于云南丽江的大气降水,与广东鹤山和青海瓦里关山等地的大气降水相当。其污染来源除部分属自然源外,还主要与建筑活动、工业生产、汽车尾气等人类活动等有密切关系。     

基于DInSAR与概率积分法的铁路变形监测与预测

为掌握采空区上方铁路实时动态变形及变形趋势,本文提出了合成孔径雷达差分干涉技术（DInSAR）与概率积分法相结合的方法。首先利用DInSAR技术对采空区进行了监测,并利用水准数据对DInSAR结果进行了验证;然后基于DInSAR结果结合概率积分法反算参数,并对参数进行了修正,得到工作面充分采动时的下沉参数;最后利用修正的参数对铁路的变形进行了预测。结果表明两者的结合可以有效地对铁路等线性构筑物进行监测与预测。     

A technique of digital surface model generation

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Techniques of 3D component database establishing and quality control for wooden building

1　ＩｎｔｒｏｄｕｃｔｉｏｎＣｈｉｎｅｓｅａｒｃｈｉｔｅｃｔｕｒｅｉｓｏｎｅｏｆｔｈｅｍｏｓｔｖａｌｕａｂｌｅｃｕｌｔｕｒｅｈｅｒｉｔａｇｅｉｎｔｈｅｗｏｒｌｄ .Ｔｈｅｈａｌｌ,ａｔｔｉｃ ,ｐｒｏｃｈａｎｄｔｏｗｅｒｂｙｔｉｍｂｅｒｃｏｍｐｏｎｅｎｔ,ｓｕｃｈａｓｔｏｕ ,ｋｕｎｇ ,ａｎｇ ,ｆａｎｇ ,ｂｅａｍ ,ｒａｆｔｅｒ,ｃｏｌｕｍｎ ,ｅｔｃ .ｈａｖｅｍｕｃｈｔｏｂｅａｄｍｉｒｅｄ .ＴｈｅＣｈｉＬｉｎＲｅｄｅｖｅｌｏｐｍｅｎｔｗｉｌｌｂｒｉｎｇｌｉｆｅｔｏｔｈｅａｒｔｉｓｔｉｃａｎｄａｒｃｈｉｔｅｃ…     

3D COMPUTER SIMULATION FOR LIGNIFICATION OF ANCIENT CHINESE TIMBER BUILDINGS

1　ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅａｒｔｏｆａｎｃｉｅｎｔＣｈｉｎｅｓｅａｒｃｈｉｔｅｃｔｕｒｅｉｓｔｈｅｅｓｓｅｎｃｅｏｆｔｈｅＣｈｉｎｅｓｅｃｕｌｔｕｒａｌｈｅｒｉｔａｇｅｓ .Ｉｔｈａｓｉｍ ｐｏｒｔａｎｔｓｉｇｎｉｆｉｃａｎｃｅｆｏｒｓｔｕｄｙｉｎｇａｎｄｌｅａｒｎｉｎｇＣｈｉ ｎｅｓｅｃｕｌｔｕｒｅａｎｄｃｉｖｉｌｉｚａｔｉｏｎ .Ｉｔｉｓｏｆｇｒｅａｔｄｉｆｆｉｃｕｌ ｔｙ ,ｈｏｗｅｖｅｒ,ｔｏｌｅａｒｎｔｈｅｃｏｍｐｌｉｃａｔｅｄｓｔｒｕｃｔｕｒｅｏｆａｎｃｉｅｎｔＣｈｉｎｅｓｅａｒｃｈｉ…     

机载GPS天线与摄影机偏心测定方法及精度讨论

在ＧＰＳ辅助空中三角测量中，机载ＧＰＳ接收天线与航摄相机中心之间的偏心分量测定是一项重要的工作。介绍了三种测定该偏心分量的方法及适用场合，并对偏心分量测定和转换中所涉及的有关问题及ＧＰＳ辅助空中三角测量区域网平差对偏心值测定精度的要求进行了讨论。试验证实了所提出的偏心测定方法是正确的。     

航空数码相机在城市三维重建中的应用研究

讨论了利用航空数码相机重构城市三维模型的方法和过程,对其引入的像对数量增加、交会角减小和相机畸变补偿等问题,提出了相应的解决办法,实现了对三维重建数据质量的有效控制.