Based on the main characteristics of the tectonic -magmatic evolution of region and Tanlu fault zone,we have discussed ore-bearing magmatic rocks petrochemistry,strontium and lead isotope,and the source of ore-forming...Based on the main characteristics of the tectonic -magmatic evolution of region and Tanlu fault zone,we have discussed ore-bearing magmatic rocks petrochemistry,strontium and lead isotope,and the source of ore-forming materials in Yinan skarn deposit in this paper.The petrochemical features show that the ore-bearing magmatic rocks are calc-alkaline rocks of sub-alkaline series formed during展开更多
"Golden triangle"area bordered on Yunnan-Guizhou-Guangxi was one of the most important Carlin-type gold deposits concentration areas.Deep understanding of Carlin-type gold deposits in Guizhou and Guangxi Pro..."Golden triangle"area bordered on Yunnan-Guizhou-Guangxi was one of the most important Carlin-type gold deposits concentration areas.Deep understanding of Carlin-type gold deposits in Guizhou and Guangxi Province had reached through several decades studies,but geological environment was very complex in the southeastern Yunnan,and Carlin-type gold deposits produced in the southeastern Yunnan were different from that of America,few studies were taken there.Based on a large number of field work,studies on the geological characteristics combining with geochemistry characteristics were taken,and analysis the genesis of Laozhaiwan gold deposit.The types of alteration in Laozhaiwan gold deposit were mainly silicification and pyritization,and Gold grade was high when silicification and pyritization were both occurred.It could be caculated that fluid density(g/cm3)varied from 0.7 to 4.9,salinity varied from 0.76%to 0.95%and ore-forming pressure(Pa)varied from 1.81×105 to 49.96×105 according to fluid inclusion test results,showed that Laozhaiwan gold deposit was hypabyssal hydrothermal deposit in low temperature and low salinity.According to composition of fluid inclusion analysis,combining with H-O isotope,made theδD-δ18O figure,showed that the fluid of the deposit rooted in formation water and mixed with meteoric waters later.展开更多
To solve the fundamental problem of insufficient heat available during defrosting while ensuring the efficient and safe system operation for air-source heat pumps (ASHPs). A novel reverse-cycle defrosting (NRCD) metho...To solve the fundamental problem of insufficient heat available during defrosting while ensuring the efficient and safe system operation for air-source heat pumps (ASHPs). A novel reverse-cycle defrosting (NRCD) method based on thermal energy storage to eliminate frost off the outdoor coil surface was developed. Comparative experiments using both the stand reverse cycle defrosting (SRCD) method and the NRCD method were carried out on an experimental ASHP unit with a nominal 2.5 kW heating capacity. The results indicate that during defrosting operation, using the NRCD method improves discharge and suction pressures by 0.24 MPa and 0.19 MPa, respectively, shortens defrosting duration by 60%, and reduces the defrosting energy consumption by 48.1% in the experimental environment, compared with those by the use of SRCD method. Therefore, using the NRCD method can shorten the defrosting duration, improve the indoor thermal comfort, and reduce the defrosting energy consumption in defrosting.展开更多
The material sources and control factors of rare earth elemems （REEs） for 25 borehole bulk samples from the Late Permian Longtan Formation in Mount Huaying （borehole number： ZK10-6）, Sichuan Province, South China...The material sources and control factors of rare earth elemems （REEs） for 25 borehole bulk samples from the Late Permian Longtan Formation in Mount Huaying （borehole number： ZK10-6）, Sichuan Province, South China, were investigated. All samples were determined by inductively coupled plasma mass spectrometry （ICP-MS）. The chondrite-normalized distribution patterns of mudstone samples are uniform. All samples belong to the light rare earth element （LREE）-rich type and are enriched in LREEs relative to heavy rare earth elements （HREEs）. The distribution curves of REEs in mudstone are highly similar to Mount Emei basalt and the three periods of REEs enrichment correspond to three Mount Emei basalt eruption cycles in Longtan period. The results indicate that REE patterns are not controlled by materials from the seawater or land plants. The predominant sources of REEs are from terrigenous material as indicated by negative Eu anomaly. So, the sources of REEs are controlled by terrigenous material, and the Mount Emei basalt is the predominant source of terrigenous material. Thus, transgression-regression is another control factor of REEs enrichment.展开更多
为探究流域内物源的空间分布状态对泥石流易发性的影响,采用数学统计原理最近邻指数对物源的空间聚类进行量化,并基于2243条小流域为评价单元,以纵比降、面积-高程积分、地形湿度指数、地震峰值加速度、岩性坚硬度为孕灾指标,物源的聚...为探究流域内物源的空间分布状态对泥石流易发性的影响,采用数学统计原理最近邻指数对物源的空间聚类进行量化,并基于2243条小流域为评价单元,以纵比降、面积-高程积分、地形湿度指数、地震峰值加速度、岩性坚硬度为孕灾指标,物源的聚集度指标、连通性指数、物源储量等物源指标为核心,依托LightGBM模型探究金沙江上游石鼓-岗托河段的泥石流易发性。研究过程分别计算物源因子的指标体系与不包含物源因子的指标体系。两种结果均表明:较高、高易发区主要集中在奔子栏-巴塘河段。通过ROC(receiver operating characteristic curve)曲线分析可得,加入物源特征指标后得出AUC(area under the curve)值与不含物源特征的AUC值相比提升了6%,表明在加入物源指标后,模型呈现出良好表现,预测精度较高;也证明了物源特征指标对于泥石流发生概率的关联性很大。展开更多
供应链级别的开源软件及组件复用是当前软件开发的主流模式.该模式避免了重复开发,降低了研发成本,提高了开发效率,但是也不可避免地存在组件的来源未知,成分不清,漏洞不明,许可证违规等问题.为解决上述问题,研究人员提出了软件物料清单...供应链级别的开源软件及组件复用是当前软件开发的主流模式.该模式避免了重复开发,降低了研发成本,提高了开发效率,但是也不可避免地存在组件的来源未知,成分不清,漏洞不明,许可证违规等问题.为解决上述问题,研究人员提出了软件物料清单(software bill of material,SBOM).SBOM详细列出了构成软件的组件及组件之间的关系,揭示了潜在的和已知的威胁,使软件透明化.自提出以来,国内外研究人员针对SBOM的研究主要聚焦在SBOM的现状、应用和工具上,缺少理论化、体系化的研究.综述SBOM的背景、基本概念、生成技术、工具及性能分析、应用、挑战与趋势,并提出融合细粒度安全漏洞感知,许可证冲突检测的SBOM+,以期从概念、技术、工具、应用和发展等方面为SBOM、软件开发、供应链安全等研究人员提供支撑.展开更多
文摘Based on the main characteristics of the tectonic -magmatic evolution of region and Tanlu fault zone,we have discussed ore-bearing magmatic rocks petrochemistry,strontium and lead isotope,and the source of ore-forming materials in Yinan skarn deposit in this paper.The petrochemical features show that the ore-bearing magmatic rocks are calc-alkaline rocks of sub-alkaline series formed during
基金financially supported by the Program of National Natural Science Foundation of China(No.41372093No.40930423+2 种基金No.41171302)the work item of China Geological Survey(No.12120113036200)higher education quality engineering project of chalcography excellent textbook Construction(No.XJC1105)
文摘"Golden triangle"area bordered on Yunnan-Guizhou-Guangxi was one of the most important Carlin-type gold deposits concentration areas.Deep understanding of Carlin-type gold deposits in Guizhou and Guangxi Province had reached through several decades studies,but geological environment was very complex in the southeastern Yunnan,and Carlin-type gold deposits produced in the southeastern Yunnan were different from that of America,few studies were taken there.Based on a large number of field work,studies on the geological characteristics combining with geochemistry characteristics were taken,and analysis the genesis of Laozhaiwan gold deposit.The types of alteration in Laozhaiwan gold deposit were mainly silicification and pyritization,and Gold grade was high when silicification and pyritization were both occurred.It could be caculated that fluid density(g/cm3)varied from 0.7 to 4.9,salinity varied from 0.76%to 0.95%and ore-forming pressure(Pa)varied from 1.81×105 to 49.96×105 according to fluid inclusion test results,showed that Laozhaiwan gold deposit was hypabyssal hydrothermal deposit in low temperature and low salinity.According to composition of fluid inclusion analysis,combining with H-O isotope,made theδD-δ18O figure,showed that the fluid of the deposit rooted in formation water and mixed with meteoric waters later.
基金Project(50606007) supported by the National Natural Science Foundation of China
文摘To solve the fundamental problem of insufficient heat available during defrosting while ensuring the efficient and safe system operation for air-source heat pumps (ASHPs). A novel reverse-cycle defrosting (NRCD) method based on thermal energy storage to eliminate frost off the outdoor coil surface was developed. Comparative experiments using both the stand reverse cycle defrosting (SRCD) method and the NRCD method were carried out on an experimental ASHP unit with a nominal 2.5 kW heating capacity. The results indicate that during defrosting operation, using the NRCD method improves discharge and suction pressures by 0.24 MPa and 0.19 MPa, respectively, shortens defrosting duration by 60%, and reduces the defrosting energy consumption by 48.1% in the experimental environment, compared with those by the use of SRCD method. Therefore, using the NRCD method can shorten the defrosting duration, improve the indoor thermal comfort, and reduce the defrosting energy consumption in defrosting.
基金Project(40839910) supported by the National Natural Science Foundation of China
文摘The material sources and control factors of rare earth elemems （REEs） for 25 borehole bulk samples from the Late Permian Longtan Formation in Mount Huaying （borehole number： ZK10-6）, Sichuan Province, South China, were investigated. All samples were determined by inductively coupled plasma mass spectrometry （ICP-MS）. The chondrite-normalized distribution patterns of mudstone samples are uniform. All samples belong to the light rare earth element （LREE）-rich type and are enriched in LREEs relative to heavy rare earth elements （HREEs）. The distribution curves of REEs in mudstone are highly similar to Mount Emei basalt and the three periods of REEs enrichment correspond to three Mount Emei basalt eruption cycles in Longtan period. The results indicate that REE patterns are not controlled by materials from the seawater or land plants. The predominant sources of REEs are from terrigenous material as indicated by negative Eu anomaly. So, the sources of REEs are controlled by terrigenous material, and the Mount Emei basalt is the predominant source of terrigenous material. Thus, transgression-regression is another control factor of REEs enrichment.
文摘为探究流域内物源的空间分布状态对泥石流易发性的影响,采用数学统计原理最近邻指数对物源的空间聚类进行量化,并基于2243条小流域为评价单元,以纵比降、面积-高程积分、地形湿度指数、地震峰值加速度、岩性坚硬度为孕灾指标,物源的聚集度指标、连通性指数、物源储量等物源指标为核心,依托LightGBM模型探究金沙江上游石鼓-岗托河段的泥石流易发性。研究过程分别计算物源因子的指标体系与不包含物源因子的指标体系。两种结果均表明:较高、高易发区主要集中在奔子栏-巴塘河段。通过ROC(receiver operating characteristic curve)曲线分析可得,加入物源特征指标后得出AUC(area under the curve)值与不含物源特征的AUC值相比提升了6%,表明在加入物源指标后,模型呈现出良好表现,预测精度较高;也证明了物源特征指标对于泥石流发生概率的关联性很大。
文摘供应链级别的开源软件及组件复用是当前软件开发的主流模式.该模式避免了重复开发,降低了研发成本,提高了开发效率,但是也不可避免地存在组件的来源未知,成分不清,漏洞不明,许可证违规等问题.为解决上述问题,研究人员提出了软件物料清单(software bill of material,SBOM).SBOM详细列出了构成软件的组件及组件之间的关系,揭示了潜在的和已知的威胁,使软件透明化.自提出以来,国内外研究人员针对SBOM的研究主要聚焦在SBOM的现状、应用和工具上,缺少理论化、体系化的研究.综述SBOM的背景、基本概念、生成技术、工具及性能分析、应用、挑战与趋势,并提出融合细粒度安全漏洞感知,许可证冲突检测的SBOM+,以期从概念、技术、工具、应用和发展等方面为SBOM、软件开发、供应链安全等研究人员提供支撑.
