In the light of field investigation, microscopic study, X\|ray phase analysis and mineral infrared spectral analysis, it is considered that laumontitization is of extensive occurrence in the Axi gold orefield. The dev...In the light of field investigation, microscopic study, X\|ray phase analysis and mineral infrared spectral analysis, it is considered that laumontitization is of extensive occurrence in the Axi gold orefield. The development of laumontitization and its relationship to mineralization show that the laumontitization appeared mainly at the top of and in the periphery of orebodies, and occurred at the edge of the epithermal system or at the late stage of epithermal system evolution. Therefore, laumontitization can be used as an exploration indicator of epithermal gold deposits. The fluids responsible for laumontitization in the Axi gold orefield are similar to those producing hot spring\|type gold deposits or those from modern geothermal fields. Epithermal mineralization of the Axi gold deposit was dated at Carboniferous, indicating that the West Tianshan of China is a region favorable to epithermal\|type gold mineralization and preservation. Hence the West Tianshan of China is a target area for exploring epithermal gold deposits.展开更多
为了保证铁路视频监控系统实时性,提高视频数据的传输和处理速度,提出了基于AXI总线的视频数据传输处理的FPGA实现;视频数据输入和输出都是XSVI(XILINX streaming video interface)视频格式,传输采用AXI-Stream格式;XSVI2AXI-Stream接...为了保证铁路视频监控系统实时性,提高视频数据的传输和处理速度,提出了基于AXI总线的视频数据传输处理的FPGA实现;视频数据输入和输出都是XSVI(XILINX streaming video interface)视频格式,传输采用AXI-Stream格式;XSVI2AXI-Stream接口通过触发器将信号同步后,加同步FIFO缓冲转换为AXI-Stream格式;AXI-Stream2XSVI接口通过视频时间控制器产生扫描信号,和AXI-Stream总线传输的视频数据时序对应后得到XSVI格式;XSVI和AXI的转换接口控制器在modelsim软件上实现功能仿真,在ISE软件上实现综合与应用,并在Sparten6开发板上得到验证,AXI总线资源占用较少,同时速率可以达到300 MHz。展开更多
文摘In the light of field investigation, microscopic study, X\|ray phase analysis and mineral infrared spectral analysis, it is considered that laumontitization is of extensive occurrence in the Axi gold orefield. The development of laumontitization and its relationship to mineralization show that the laumontitization appeared mainly at the top of and in the periphery of orebodies, and occurred at the edge of the epithermal system or at the late stage of epithermal system evolution. Therefore, laumontitization can be used as an exploration indicator of epithermal gold deposits. The fluids responsible for laumontitization in the Axi gold orefield are similar to those producing hot spring\|type gold deposits or those from modern geothermal fields. Epithermal mineralization of the Axi gold deposit was dated at Carboniferous, indicating that the West Tianshan of China is a region favorable to epithermal\|type gold mineralization and preservation. Hence the West Tianshan of China is a target area for exploring epithermal gold deposits.
文摘为了保证铁路视频监控系统实时性,提高视频数据的传输和处理速度,提出了基于AXI总线的视频数据传输处理的FPGA实现;视频数据输入和输出都是XSVI(XILINX streaming video interface)视频格式,传输采用AXI-Stream格式;XSVI2AXI-Stream接口通过触发器将信号同步后,加同步FIFO缓冲转换为AXI-Stream格式;AXI-Stream2XSVI接口通过视频时间控制器产生扫描信号,和AXI-Stream总线传输的视频数据时序对应后得到XSVI格式;XSVI和AXI的转换接口控制器在modelsim软件上实现功能仿真,在ISE软件上实现综合与应用,并在Sparten6开发板上得到验证,AXI总线资源占用较少,同时速率可以达到300 MHz。
