Organic matter is related closely to mineralization of Lannigou gold deposit in southwestern Guizhou, China. Regionally, the distribution of organic carbon agrees well with that of faults within which gold deposits ar...Organic matter is related closely to mineralization of Lannigou gold deposit in southwestern Guizhou, China. Regionally, the distribution of organic carbon agrees well with that of faults within which gold deposits are hosted. Studies on organic petrology show that pyrobitumen, which is related most closely to mineralization, adheres to quartz vein or fills quartz veinlet. Proton-induced X-ray emission (PIXE) analysis shows an evident abundance of Au in pyrobitumen. Pyrobitumen paragenetically associates with pyrite and arsenopyrite which are the main carrier minerals of Au. The thermal simulation experiment indicates that about 99% of Au will be concentrated in oil phase in the coexisting system of oil and brine and rock. The role of crude oil in ore-forming process is: as carrier of Au, crude oil moves upwards, and undergoes thermal decomposition and thermochemical reduction when it encounters the oxidizing fluid within the Trassic turbidity; Au is thus released from crude oil, reduced and precipitated.展开更多
为提高船舶设计效率,针对国际船级社协会(International Association of Classification Socie-ties,IACS)2006年推出的散货船、双壳油船共同结构规范CSR-BC/OT,中国船级社(China Classifi-cation Society,CCS)开发出计算软件CSR-SDP....为提高船舶设计效率,针对国际船级社协会(International Association of Classification Socie-ties,IACS)2006年推出的散货船、双壳油船共同结构规范CSR-BC/OT,中国船级社(China Classifi-cation Society,CCS)开发出计算软件CSR-SDP.该软件分为针对散货船的CSR-SDP(BC)和针对双壳油船的CSR-SDP(OT)两套,是集规范设计,载荷计算以及船体结构强度分析、评估和疲劳寿命评估于一体的船体结构设计和规范校核系统,较全面地覆盖CSR-BC/OT的要求,较好地满足CSR船舶设计和审图的需要.展开更多
鉴于国际船级社协会(International Association of Classification Societies,IACS)2006年推出的散货船、双壳油船共同结构规范CSR-BC/OT的复杂性,为减小用人工方法施加载荷、处理结果和扣除腐蚀等的工作量,降低出错率,中国船级社(Chin...鉴于国际船级社协会(International Association of Classification Societies,IACS)2006年推出的散货船、双壳油船共同结构规范CSR-BC/OT的复杂性,为减小用人工方法施加载荷、处理结果和扣除腐蚀等的工作量,降低出错率,中国船级社(China Classification Society,CCS)开发出有限元直接计算软件CSR-DSA.该软件以MSC Patran为平台,并使用PCL开发实现自动扣除腐蚀,施加载荷,校核屈服、屈曲、疲劳和细化网格等功能,覆盖CSR-BC/OT的大部分直接强度分析要求.CSR-DSA已得到广泛应用,很大程度上解决该规范带来的工作量大和计算易出错等问题,可以大大缩短船舶设计和审图的工作周期、提高计算准确性.展开更多
基金Project supported by the Climbing Project (No. PA30)the National Natural Science Foundation of China (Grant No. 49673190).
文摘Organic matter is related closely to mineralization of Lannigou gold deposit in southwestern Guizhou, China. Regionally, the distribution of organic carbon agrees well with that of faults within which gold deposits are hosted. Studies on organic petrology show that pyrobitumen, which is related most closely to mineralization, adheres to quartz vein or fills quartz veinlet. Proton-induced X-ray emission (PIXE) analysis shows an evident abundance of Au in pyrobitumen. Pyrobitumen paragenetically associates with pyrite and arsenopyrite which are the main carrier minerals of Au. The thermal simulation experiment indicates that about 99% of Au will be concentrated in oil phase in the coexisting system of oil and brine and rock. The role of crude oil in ore-forming process is: as carrier of Au, crude oil moves upwards, and undergoes thermal decomposition and thermochemical reduction when it encounters the oxidizing fluid within the Trassic turbidity; Au is thus released from crude oil, reduced and precipitated.
文摘为提高船舶设计效率,针对国际船级社协会(International Association of Classification Socie-ties,IACS)2006年推出的散货船、双壳油船共同结构规范CSR-BC/OT,中国船级社(China Classifi-cation Society,CCS)开发出计算软件CSR-SDP.该软件分为针对散货船的CSR-SDP(BC)和针对双壳油船的CSR-SDP(OT)两套,是集规范设计,载荷计算以及船体结构强度分析、评估和疲劳寿命评估于一体的船体结构设计和规范校核系统,较全面地覆盖CSR-BC/OT的要求,较好地满足CSR船舶设计和审图的需要.
文摘鉴于国际船级社协会(International Association of Classification Societies,IACS)2006年推出的散货船、双壳油船共同结构规范CSR-BC/OT的复杂性,为减小用人工方法施加载荷、处理结果和扣除腐蚀等的工作量,降低出错率,中国船级社(China Classification Society,CCS)开发出有限元直接计算软件CSR-DSA.该软件以MSC Patran为平台,并使用PCL开发实现自动扣除腐蚀,施加载荷,校核屈服、屈曲、疲劳和细化网格等功能,覆盖CSR-BC/OT的大部分直接强度分析要求.CSR-DSA已得到广泛应用,很大程度上解决该规范带来的工作量大和计算易出错等问题,可以大大缩短船舶设计和审图的工作周期、提高计算准确性.
