Application of the LP-DP approach to Andong and Imha parallel reservoirs,Korea

This paper presents an application of a previously developed linear programming-dynamic programming (LP-DP) methodology to the operation of Andong and Imha parallel reservoirs in South Korea. The model allows for multioptimization of power generation and municipal, industrial, and irrigation water use. It is shown that the annual average energy and the annual average water supply generated from the joint operation of the two parallel reservoirs by the LD-DP approach is 15.2 and 1.7% more than the contracted power production and water supply respectively.     

一种降低DMT系统发送信号峰值的非线性映射方法

针对DMT ADSL（DMT线路码非对称数字用户环路）传输系统发送信号幅值尖峰问题。本文提出了一种降低发送信号最大峰值同时又不损失系统 传送信息的非线性映射方法。通过最优化方法合理地设计一组可逆映射器,该方法比目前ADSL系统的硬限幅方法能较大幅度地压缩系统的动态范围或在相同的动态范围下获得更好的传输性能。     

基于矩量法的天线阵互阻抗分析

利用矩量法对天线阵阵元的互阻抗进行了分析。首先对线天线进行分析建模,计算出天线上的电流分布的线密度,并由此得到互阻抗。通过算例验证,这种方法准确有效,可在工程中快速分析互耦对天线方向图的影响,具有很强的工程适应性。     

LGH-01型空气质量自动监测系统准确度检查方法探讨

LGH一01型空气自动监测系统因其独特的技术优势,在国内占有较大的市场份额,已广泛应用于城市环境空气质量监测。如何做好仪器的使用维护工作,保证监测结果的真实有效,是一线环境监测工作者每天必须面对的问题。本文针对DOAS系统准确度检查方法进行实验探讨,期望能提供给同行参考。     

对海上落水人员漂流轨迹的预测研究

为了在海难事故发生后,在最短时间内确定遇难人员的漂移方向和位置,对海上落水人员进行受力分析,量化影响目标漂移的因素,建立海上落水人员漂移模型,并在假设初始位置误差为0以及相同的风压模型的前提下,对流场数据进行线性插值计算,增大流场数据在时间上的精确度,减小目标漂流轨迹预测的误差值.     

A survey on nonlinear analog-to-digital converters

This paper presents a survey on Nonlinear Analog-to-Digital converters (ADC). This class of converters is extremely relevant in applications where there is a need for non-uniform quantization characteristic, for example, some specific applications in the areas of light detection, hearing aid, nuclear physics, image acquisition, communication systems, etc. This survey outlines the state-of-the-art Nonlinear ADC topologies, such as, floating point, logarithmic, piecewise linear and oversampled nonlinear converters, and discusses their performance and advantages in terms of their applications.     

积分电导率对广义R-T不稳定性的影响

从质量和电荷守恒方程出发,利用通量管积分方法,导出了背景电导率存在空间梯度时R-T不稳定性线性增长率的表达式,分析和估计了E区Pedersen电导率和电导率的空间梯度对线性增长率的影响。结果表明:F区积分Pedersen电导率与E区和F区积分Pedersen电导率之和的比值与线性增长率呈显著的正相关,有限的E区Pedersen电导率可显著抑制F区不规则结构的生成和发展。通量管积分Pedersen电导率的纬圈梯度对线性增长率的影响可达约35%以上,是控制夜间电离层不规则结构生成和发展的一种重要因素。     

基于最小二乘滤波器的空域视频掩盖算法

针对无线信道传输过程中可能出现的单个或连续宏块丢失现象,提出了一种有效的空-域差错掩盖算法.算法根据丢失像素点中是否含有边界,把丢失的像素点分为平稳点和非平稳点.对于不含有边缘的平稳点,采用线性插值的算法;对于含有边界的非平稳点,建立最小二乘滤波器(LS)模型,通过多方向的扫描方式得出预测值.实验结果表明,算法能够获得优秀的图像质量,在降低了复杂度的同时,适用于视频图像的实时传输.     

激光三角位移计线性标定的研究

介绍了激光三角位移计的工作原理，并对激光三角位移计的响应特性进行线性标定所涉及到的理论与实验技术进行了分析，给出了实验结果。     

Minimal cost one-dimensional linear hybrid cellular automata of degree through 500

This letter is a supplement of the table of the minimal cost one-dimensional linear hybrid cellular automata with the maximum length cycle by Zhang, Miller, and Muzio [IEE Electronics Letters, 27(18):1625–1627, August 1991].This work was supported in part by Research Grants and Postgraduate Scholarships from the Natural Sciences and Engineering Research Council of Canada and by an equipment loan from the Canadian Microelectronics Corporation.