一种产生大线性复杂度的方法

本文利用矩阵序列来获得大线性复杂度序列,且研究了矩阵的分量序列之间的联系及它们的周期和复杂度。     

聚合物与水气交替联驱提高采收率试验研究

采用三种不同沉积韵律平面模型试验研究水驱后聚合物与水气交替联驱提高原油采收率的驱替特征。结果表明,聚合物与水气交替联驱对正韵律油藏提高采收率效果很好;对反韵律油藏和复合韵律油藏也有不同程度提高采收率效果。通过分析两种不同韵律砂岩油藏水气交替提高采收率矿场试验成功实例,认为聚合物与水气交替联驱法可综合发挥两种方法的优势,在类似油藏中比单一方法有更好的提高采收率效果。     

Method for FIR filters design with compressed cosine using Chebyshev's norm

This paper considers a new method for FIR filters design. The method uses an L_∞ optimality norm. To achieve a better approximating effect, a new modulating function which compresses the oscillations of the cosine is proposed. A parameter sets the gradient of the modulating function, with respect to the oscillations’ compression. The approximating polynomial is carried out using Remez’ exchange algorithm. An optimal polynomial with lowest possible (four) degree, that approximates an ideal filter's response with high precision is proposed. With the proposed method a FIR filter with arbitrary specifications can be designed. Design examples of FIR filters with a minimization of calculation are performed. The obtained filter's responses are close to the ideal response. The design examples demonstrate that the proposed approach may be a good alternative in several applications.     

基于排队论的车辆维修保障中维修组个数优化

利用排队论原理解决车辆维修保障中维修组个数的确定.首先在定点保障中,对维修组进行集中配置,由此确定定点维修中维修组数目.然后以车辆完好率为目标,确定伴随保障中抢修车的数量.最后,将运输任务重要程度对车辆战损率进行加权,确定应配置抢修车的车队的最小车辆数.     

基于多项式滤波的高性能内插器的ASIC设计

提出了一种设计基于多项式滤波的高性能内插器的有效方法.偏移二进制编码的并串DA算法和折叠技术使滤波和多项式计算仅用一个乘法器完成;存储器资源比同等并行度的DA算法降低50%.在0.13μm工艺下,利用该方法实现了时钟频率为300 MHz,最高插值倍数为256的内插滤波器.总结了该方法与传统多相分解实现相比在资源消耗、灵活性等方面的优势.     

New results for path-based shared protection and link-based Hamiltonian cycle protection in survivable WDM networks

In this paper, we study the path-based shared protection (PBSP) and the link-based Hamiltonian cycle protection (LBHCP) schemes for tolerating single-link failures in survivable wavelength-division-multiplexing networks. Although previous work indicated that PBSP can perform better than link-based shared protection including the case of LBHCP, from theoretical analysis and simulation results in this paper, we can clearly see that this indication of previous work is not suitable for LBHCP since it can have a better resource utilization ratio and a faster recovery time than PBSP. Therefore, the new result of this paper is a modification for the previous inaccurate idea and it also can well guide future work of researchers.

自适应滤波器并行实现

并行处理是高速实时信号处理领域研究的主要技术,随着信号处理技术的发展,并行处理技术越来越受到人们的重视。本文通过对数字信号进行多项式并行表示,提出了自适应有限冲激响应（ＦＩＲ）滤波器并行实现的几种新方法。作者对这些方法进行了性能分析和比较,狄得了一些有意义的结论。     

浅绿色彩棉纤维改性研究

研究化学改性处理对天然浅绿色彩棉纤维性能的影响。通过碱处理和戊二醛交联对纤维品质较差的浅绿色彩棉纤维进行改性。测试了碱处理及戊二醛交联后浅绿色彩棉纤维的强伸性能、弹性回复率、回潮率及纤维形态结构。试验表明:经碱处理后,浅绿色彩棉纤维强伸性能、弹性回复率得到改善,用17%氢氧化钠溶液处理10 min的浅绿色彩棉纤维性能提高较显著;经戊二醛交联后,浅绿色彩棉纤维强度增强,断裂伸长率下降,且随着接枝率的增大,断裂伸长率趋于降低,弹性回复率趋于增大。