Controller Link 是 OMRON 推出的一种 FA 网络,能在 PLC、计算机等节点间方便、灵活地发送和接收大容量数据包,且实时性、可靠性较高。本文对 Controller Link 的组网技术进行深入研究,详细介绍了该网络的性能、硬件配置、网络组态、...Controller Link 是 OMRON 推出的一种 FA 网络,能在 PLC、计算机等节点间方便、灵活地发送和接收大容量数据包,且实时性、可靠性较高。本文对 Controller Link 的组网技术进行深入研究,详细介绍了该网络的性能、硬件配置、网络组态、通讯链接和网络监控设计技术。展开更多
Performance characteristics of partially hydrolyzed polyacrylamide （HPAM） and cross- linked polymer （CLP, Cr^3＋ as the cross linker） solutions have been investigated. A Brookfield viscometer, rheometer, dynamic l...Performance characteristics of partially hydrolyzed polyacrylamide （HPAM） and cross- linked polymer （CLP, Cr^3＋ as the cross linker） solutions have been investigated. A Brookfield viscometer, rheometer, dynamic light scattering system, and core flow device have been used to measure the viscosity, viscoelasticity, polymer coil dimensions, molecular configuration, flow characteristics, and profile modification. The results show that, under conditions of high salinity and low HPAM and Cr^3＋ concentrations, cross-linking mainly occurred between different chains of the same HPAM molecule in the presence of Cr^3＋, and a cross-linked polymer （CLP） system with a local network structure was formed. Compared with an HPAM solution of the same concentration, the apparent viscosity of the CLP solution increased slightly or remained almost unchanged, but its viscoelasticity （namely storage modulus, loss modulus, and first normal stress difference） increased, and the resistance coefficient and residual resistance coefficient increased significantly. This indicates that the CLP solution exhibits a strong capability to divert the sequentially injected polymer flood from high-permeability zones to low- permeability zones in a reservoir. Under the same HPAM concentration conditions, the dimensions of polymer coils in the CLP solution increased slightly compared with the dimensions of polymer coils in HPAM solution, which were smaller than the rock pores, indicating that the cross-linked polymer solution was well adapted to reservoir rocks. Core flood experiments show that at the same cost of reagent, the oil recovery by CLP injection （HPAM-1, Cr^3＋ as the cross linker） is 3.1% to 5.2% higher than that by HPAM- 2 injection.展开更多
针对国内对于专用通信引擎的研究空缺,实现了一种支持多协议的可配置通信引擎设计,并以典型的数据链路层协议——高级数据链路控制(High 1evel Data Link Control,HDLC)协议的引擎块实现为例,采用System Verilog搭建仿真平台,通过C语言...针对国内对于专用通信引擎的研究空缺,实现了一种支持多协议的可配置通信引擎设计,并以典型的数据链路层协议——高级数据链路控制(High 1evel Data Link Control,HDLC)协议的引擎块实现为例,采用System Verilog搭建仿真平台,通过C语言编写测试case,以回环验证的方式保证设计正确性。可配置引擎块以自研RSIC核为核心,采用AHB总线互连,内部集成HDLC、UART等通信协议以及DMA、TDM、GPIO等通用外设,实现通信协议的处理及数据传输,有助于解放处理器负载,提高数据处理效率,同时将HDLC与可配置通信引擎相结合,解决了多路信号的HDLC对处理器资源的占用率高等问题。展开更多
基金financial support from the National Key Technology R&D Program in the 12th Five Year Plan of PetroChina (No: 2011ZX05010-003-02)the National Key Technology R&D Program in the 12th Five Year Plan of CNOOC (No: 2011ZX05024-04-05-03)
文摘Performance characteristics of partially hydrolyzed polyacrylamide （HPAM） and cross- linked polymer （CLP, Cr^3＋ as the cross linker） solutions have been investigated. A Brookfield viscometer, rheometer, dynamic light scattering system, and core flow device have been used to measure the viscosity, viscoelasticity, polymer coil dimensions, molecular configuration, flow characteristics, and profile modification. The results show that, under conditions of high salinity and low HPAM and Cr^3＋ concentrations, cross-linking mainly occurred between different chains of the same HPAM molecule in the presence of Cr^3＋, and a cross-linked polymer （CLP） system with a local network structure was formed. Compared with an HPAM solution of the same concentration, the apparent viscosity of the CLP solution increased slightly or remained almost unchanged, but its viscoelasticity （namely storage modulus, loss modulus, and first normal stress difference） increased, and the resistance coefficient and residual resistance coefficient increased significantly. This indicates that the CLP solution exhibits a strong capability to divert the sequentially injected polymer flood from high-permeability zones to low- permeability zones in a reservoir. Under the same HPAM concentration conditions, the dimensions of polymer coils in the CLP solution increased slightly compared with the dimensions of polymer coils in HPAM solution, which were smaller than the rock pores, indicating that the cross-linked polymer solution was well adapted to reservoir rocks. Core flood experiments show that at the same cost of reagent, the oil recovery by CLP injection （HPAM-1, Cr^3＋ as the cross linker） is 3.1% to 5.2% higher than that by HPAM- 2 injection.
文摘针对国内对于专用通信引擎的研究空缺,实现了一种支持多协议的可配置通信引擎设计,并以典型的数据链路层协议——高级数据链路控制(High 1evel Data Link Control,HDLC)协议的引擎块实现为例,采用System Verilog搭建仿真平台,通过C语言编写测试case,以回环验证的方式保证设计正确性。可配置引擎块以自研RSIC核为核心,采用AHB总线互连,内部集成HDLC、UART等通信协议以及DMA、TDM、GPIO等通用外设,实现通信协议的处理及数据传输,有助于解放处理器负载,提高数据处理效率,同时将HDLC与可配置通信引擎相结合,解决了多路信号的HDLC对处理器资源的占用率高等问题。
