以就业为导向的应用电子专业人才培养方案改革的研究

高职高专目前开设的应用电子相关方向繁多,如何紧跟社会用人需求的变化,以及根据院校所处地域特点有效地开展专业人才的培养是本文讨论的主要问题。     

塔里木盆地二叠系火山岩空间展布的精细刻画及其地质意义

利用塔里木油田的大量勘探资料,通过野外露头、钻井、测井、2D地震资料的综合研究,确定了塔里木盆地内二叠系火山岩的地震反射特征,建立了火山岩测井-地震综合识别模式,精细刻画了盆地内二叠系残余火山岩的空间展布情况。在此基础上计算得出:盆地内二叠系残余玄武岩覆盖面积约为2.46×105 km2,盆地内二叠系残余流纹岩覆盖面积约为4.04×104 km2。由于盆地内北部和东部二叠系大范围缺失,盆地内二叠系火山岩原始喷发面积和喷出量可能远大于残余量。该研究对塔里木二叠系大火成岩省的进一步认识具有重要意义。     

CRC Look-up Table Optimization for Single-Bit Error Correction

Many communication systems use the cyclic redundancy code （CRC） technique for protecting key data fields from transmission errors by enabling both single-bit error correction and multi-bit error detection. The look-up table design is very important for the error-correction implementation. This paper presents a CRC look-up table optimization method for single-bit error correction. The optimization method minimizes the address length of the pre-designed look-up table while satisfying certain restrictions. The circuit implementation is also presented to show the feasibility of the method in the application specific integrated circuit design. An application of the optimization method in the generic framing procedure protocol is implemented using field programmable gatearrays. The result shows that the memory address length has been minimized, while keeping a very simple circuit implementation.     

Unfolded Frequency Response and Model of a Multi-Tap Direct Sampling Mixer

A transform method was used to model a discrete time multi-tap direct sampling mixer. The method transforms the mixed filtering and down-sampling stages to separate cascade filtering and sampling stages to determine the unfolded frequency response which shows the anti-aliasing ability of the mixer. The trans-formation can also be applied to other mixed signal and multi-rate receiver systems to analyze their unfolded frequency responses. The transformed system architecture was used to calculate the unfolded frequency response of the multi-tap direct sampling mixer and compared with the mixer model without noise in the advanced design system 2005A environment to further evaluate the frequency response. The simulations show that the -3 dB bandwidth is 3.0 MHz and the voltage gain is attenuated by 1.5 dB within a 1-MHz baseband bandwidth.     

视觉导航智能汽车路径识别图像处理算法研究

复杂环境下图像快速准确处理是智能汽车稳定运行的前提和保证.该文针对由于光线等因素造成图像对比度不明显问题,提出了线性变换方法处理图像;针对由于图像边缘点的干扰而造成中位数处理失败,提出了中值滤波和T型窗口算法;基于Roberts算子的高精度和Sobel算子的高运算效率,提出了一种融合两种算子的融合算法用以改进边缘检测算法.实际应用表明,上述算法可以过滤边缘噪音,有效地去除干扰噪音,过滤后整幅图像的边缘更连续平滑,融合算法的计算量远远小于单一算子,算法的实时性和准确性大幅提高.