FPGA动态局部可重构技术通常将系统划分为固定模块和可重构模块,可重构模块与其他模块之间的通信都是通过使用特殊的总线宏实现的。总线宏的正确设计是实现FPGA动态局部可重构技术的关键。在研究了FPGA动态局部可重构技术中基于三态缓冲...FPGA动态局部可重构技术通常将系统划分为固定模块和可重构模块,可重构模块与其他模块之间的通信都是通过使用特殊的总线宏实现的。总线宏的正确设计是实现FPGA动态局部可重构技术的关键。在研究了FPGA动态局部可重构技术中基于三态缓冲器(Tri-state Buffer,TBUF)总线宏结构的基础上,采用Xilinx ISE FPGA Editor可视化的方法实现总线宏的设计,并借助可重构硬件平台——XCV800验证板,通过设计动态可重构实验,论证总线宏设计的正确性。展开更多
In vitro degradation is an important approach to screening appropriate biomedical magnesium（Mg） alloys at low cost. However, corrosion products deposited on Mg alloys exert a critical impact on corrosion resistance....In vitro degradation is an important approach to screening appropriate biomedical magnesium（Mg） alloys at low cost. However, corrosion products deposited on Mg alloys exert a critical impact on corrosion resistance. There are no acceptable criteria on the evaluation on degradation rate of Mg alloys. Understanding the degradation behavior of Mg alloys in presence of Tris buffer is necessary. An investigation was made to compare the influence of Tris-HCl and Tris on the corrosion behavior of Mg alloy AZ31 in the presence of various anions of simulated body fluids via hydrogen evolution, p H value and electrochemical tests.The results demonstrated that the Tris-HCl buffer resulted in general corrosion due to the inhibition of the formation of corrosion products and thus increased the corrosion rate of the AZ31 alloy. Whereas Tris gave rise to pitting corrosion or general corrosion due to the fact that the hydrolysis of the amino-group of Tris led to an increase in solution p H value, and promoted the formation of corrosion products and thus a significant reduction in corrosion rate. In addition, the corrosion mechanisms in the presence of Tris-HCl and Tris were proposed. Tris-HCl as a buffer prevented the formation of precipitates of HCO;, SO;,HPO;and H;PO;ions during the corrosion of the AZ31 alloy due to its lower buffering p H value（x.x）.Thus, both the hydrogen evolution rate and corrosion current density of the alloy were approximately one order of magnitude higher in presence of Tris-HCl than Tris and Tris-free saline solutions.展开更多
文摘FPGA动态局部可重构技术通常将系统划分为固定模块和可重构模块,可重构模块与其他模块之间的通信都是通过使用特殊的总线宏实现的。总线宏的正确设计是实现FPGA动态局部可重构技术的关键。在研究了FPGA动态局部可重构技术中基于三态缓冲器(Tri-state Buffer,TBUF)总线宏结构的基础上,采用Xilinx ISE FPGA Editor可视化的方法实现总线宏的设计,并借助可重构硬件平台——XCV800验证板,通过设计动态可重构实验,论证总线宏设计的正确性。
基金supported by the National Natural Science Foundation of China (Grant Nos. 51241001 and 51571134)SDUST Research Fund (No. 2014TDJH104)
文摘In vitro degradation is an important approach to screening appropriate biomedical magnesium（Mg） alloys at low cost. However, corrosion products deposited on Mg alloys exert a critical impact on corrosion resistance. There are no acceptable criteria on the evaluation on degradation rate of Mg alloys. Understanding the degradation behavior of Mg alloys in presence of Tris buffer is necessary. An investigation was made to compare the influence of Tris-HCl and Tris on the corrosion behavior of Mg alloy AZ31 in the presence of various anions of simulated body fluids via hydrogen evolution, p H value and electrochemical tests.The results demonstrated that the Tris-HCl buffer resulted in general corrosion due to the inhibition of the formation of corrosion products and thus increased the corrosion rate of the AZ31 alloy. Whereas Tris gave rise to pitting corrosion or general corrosion due to the fact that the hydrolysis of the amino-group of Tris led to an increase in solution p H value, and promoted the formation of corrosion products and thus a significant reduction in corrosion rate. In addition, the corrosion mechanisms in the presence of Tris-HCl and Tris were proposed. Tris-HCl as a buffer prevented the formation of precipitates of HCO;, SO;,HPO;and H;PO;ions during the corrosion of the AZ31 alloy due to its lower buffering p H value（x.x）.Thus, both the hydrogen evolution rate and corrosion current density of the alloy were approximately one order of magnitude higher in presence of Tris-HCl than Tris and Tris-free saline solutions.
