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1.
阐述了基于FPGA的B超成像系统的设计方案.该系统采用FPGA产生脉冲串,经过功率放大电路驱动超声波换能器,超声波经过探测后到达接收换能器,利用时间增益补偿电路对信号进行补偿,再用对数放大器TL441对回波信号进行检波放大,经过A/D转换到FPGA进行动态滤波,最后由FPGA控制信号在显示屏上显示输出. 相似文献
2.
Systolic implementation of multiplication over GF(2
m
) is usually very efficient in area-time complexity, but its latency is usually very large. Thus, two low latency systolic
multipliers over GF(2
m
) based on general irreducible polynomials and irreducible pentanomials are presented. First, a signal flow graph (SFG) is
used to represent the algorithm for multiplication over GF(2
m
). Then, the two low latency systolic structures for multiplications over GF(2
m
) based on general irreducible polynomials and pentanomials are presented from the SFG by suitable cut-set retiming, respectively.
Analysis indicates that the proposed two low latency designs involve at least one-third less area-delay product when compared
with the existing designs. To the authors’ knowledge, the time-complexity of the structures is the lowest found in literature
for systolic GF(2
m
) multipliers based on general irreducible polynomials and pentanomials. The proposed low latency designs are regular and
modular, and therefore they are suitable for many time critical applications. 相似文献
3.
基于MATLAB的静止图像车牌定位研究 总被引:1,自引:0,他引:1
提出了一种基于MATLAB的静止图像车牌定位的崭新方法。介绍了具体操作的原理和方法。通过对图像进行图像读取、图像处理、图像分割、图像定位标示等步骤的处理,最终获得静止图像中车牌的具体位置的标示。并进行验证得出这种方法是可行的。 相似文献
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