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Remote Sensing Study of Gold Biogeochemical Effects in the Western Guangdong-Hainan Region——A Case Study of the Hetai Gold Deposit 被引量:1
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作者 Xu Ruisong Guangzhou New Technology Institute of Geology, Academia Sinica Jiang Minxi 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 1992年第4期411-425,448,共16页
The vegetation has been poisoned by gold in the western Guangdong-Hainan region. The gold content ofthe leaves there is as high as 10-1961 times the abundance, the chlorophyll content is 10%-30% lower thanthat of the ... The vegetation has been poisoned by gold in the western Guangdong-Hainan region. The gold content ofthe leaves there is as high as 10-1961 times the abundance, the chlorophyll content is 10%-30% lower thanthat of the vegetation in metamorphic terrains and 10%-20% higher than that in granite terrains, and thecarotenoid content is 10%-44% lower than the background value. The water content of leaves is 10% to 20%lower than the background value. The cells of leaves are deformed and broken. The leaf surface shows colourspots and becomes yellow or dark green. The spectral reflectance of the leaf surface is 5%-30% higher than thebackground value: the spectral shape has shifted 5-15 nm to the short wavelength. The gray scales of eanopyon images of Landsat TM and airborne imaging scanner (AIS) are 10%-100% higher than the backgroundvalues. On Landsat TM and AIS false colour images, plants poisoned by gold display a yellow color, whichdisinguishes them from background plants. According to the spectral and image features of goldbiogeochemical effects, the author has constructed a gold information system and expert prediction system,and thus two gold target areas and two gold prospect areas have been identified rapidly, economically andaccurately in the western Guangdong-Hainan region which is extensively covered by vegetation. 展开更多
关键词 biogeochemical effects of gold deposit physiological and ecological characteristics of vegetation characteristics of spectral reflectance characteristics of remote sensing image information and experts system for gold deposit exploration
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三维可视化技术在锡铁山矿区信息化建设中的应用研究 被引量:5
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作者 石菲菲 朱谷昌 +2 位作者 杨自安 张普斌 张建国 《矿产与地质》 2007年第4期472-475,共4页
运用Vulcan三维可视化软件,对锡铁山铅-锌矿区3062m中段以下05-75线之间的主要矿体进行三维可视化研究,全方位、真实地表达近年来的地质勘探成果,并通过储量计算与找矿预测,为下一步地质勘探工作提供科学依据,为矿区信息化建设提供基础... 运用Vulcan三维可视化软件,对锡铁山铅-锌矿区3062m中段以下05-75线之间的主要矿体进行三维可视化研究,全方位、真实地表达近年来的地质勘探成果,并通过储量计算与找矿预测,为下一步地质勘探工作提供科学依据,为矿区信息化建设提供基础资料。 展开更多
关键词 铅-锌矿床 矿山信息化 三维可视化 品位估算 锡铁山
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3D extrusion of multi-biomaterial lattices using an environmentally informed workflow
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作者 Vasiliki Panagiotidou Andreas Koerner +3 位作者 Marcos Cruz Brenda Parker Bastian Beyer Sofoklis Giannakopoulos 《Frontiers of Architectural Research》 CSCD 2022年第4期691-708,共18页
The conventional building material palette has been proven limited in terms of adaptability to our current environmental challenges. Innovations in computational design and digital manufacturing have supported the bro... The conventional building material palette has been proven limited in terms of adaptability to our current environmental challenges. Innovations in computational design and digital manufacturing have supported the broadening of biomaterial applications as an alternative. While biomaterials are characteristically responsive to stimuli such as temperature and humidity, their unpredictable behaviour is a hurdle to standardization and architectural utilisation. To examine the nexus between material formulation, computation and manufacturing, multi-biomaterial lattice structures were produced through an environmentally informed workflow. Customized biomaterial development resulted in three candidate biopolymer blends with varying levels of hydro-responsiveness and transparency. The computational strategy included a machine learning clustering algorithm to customise results and dictate material distribution outputs. To test the workflow, environmental data of solar radiation exposure and solar heat gain from a specific location was used to inform the material deposition via pneumatic extrusion for the design and digital fabrication of a deformation-controlled prototype of 350 mm × 350 mm. This led to a series of multi-biomaterial wall panel components that can be applied at architectural scale. In future, these techniques can support the incorporation of living elements to be embedded within the built environment for truly animate architecture. 展开更多
关键词 Hydrogels Multi-biomaterials Hygroscopic properties Pneumatic extrusion Environmentally informed deposition Integrated workflows
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