基于MARKOV随机信道分配的车队控制研究

随着车辆的增加与交通的发展,车辆拥堵已经成为城市的一大问题,针对网络化车队的控制系统,首先给出了异构的车队控制模型,考虑到车辆间通信信道随机分配的特性,将整个车队建模为转移概率部分未知的多状态Markov跳跃系统,能够有效的解决车队控制系统中存在的信道受限问题.基于新的车队模型,利用Lyapunov方法和LMI,给出了车队随机稳定的条件以及相应控制器的设计方法.最后通过MATLAB仿真和Arduino车队实验,验证了上述方法的有效性和实用性.     

抛光废渣回收利用于抛光砖生产的研究

现有的抛光砖生产工艺由于在抛光阶段会产生大量的废渣,很难直接回收利用,从而对周边环境造成极大的破坏。其中抛光废渣中含有氯氧镁水泥等杂质是造成抛光废渣直接回收利用时产生坯体膨胀、针孔、变形等缺陷的最重要原因。针对现有的抛光砖在抛光阶段产生大量的废渣难于直接回收再用的难题,本文提出了分类回收、自然沉降、分开使用的最优处理思路,创新性地丰富了抛光废渣回收领域的技术内涵。     

铝-钛-硼丝晶粒细化效果研究

通过分析两个不同厂家铝-钛-硼丝的化学成分、晶粒细化效果、显微组织以及分别使用两种铝-钛-硼丝作为晶粒细化剂生产的1060铝合金板材的显微组织,对两种铝-钛-硼丝的晶粒细化效果进行了评估.     

压力式MBR技术在污水处理中的应用

本文介绍了膜生物反应器的优点及分类,并重要对压力式AirLift-MBR与浸没式MBR在给水、反洗、化学清洗、设备维护及运行成本等方面进行了比较。详细介绍了AirLlift-MBR的工艺过程、工艺参数以及应用业绩,重点介绍了Airlift-MBR技术在迪拜棕榈岛的运行状况。     

A Polynomial Complexity Optimal Multiuser Detection Algorithm Based on Monotonicity Properties

An optimal multiuser detection algorithm with a computational complexity of O(K log K) is proposed for the class of linear multiple‐access systems which have constant cross‐correlation values. Here the optimal multiuser detection is implemented by searching for a monotone sequence with maximum likelihood, under the ranking of sufficient statistics. The proposed algorithm is intuitive and concise. It is carried out in just two steps, and at each step only one kind of operation is performed. Also, the proposed algorithm can be extended to more complex systems having more than a single cross‐correlation value.     

大庆地区浅层粉土层地基承载力特征值与试验指标的关系

根据大庆地区多年工程实践积累,总结了由现场载荷试验确定的浅层粉土地基承栽力值与含水量和孔隙比的近似经验公式,为大庆地区浅层粉土地基承载力的确定提供了地方经验与参考.     

Effect of the initial dose of foot-and-mouth disease virus on the early viral dynamics within pigs

This paper investigates the early viral dynamics of foot-and-mouth disease (FMD) within infected pigs. Using an existing within-host model, we investigate whether individual variation can be explained by the effect of the initial dose of FMD virus. To do this, we consider the experimental data on the concentration of FMD virus genomes in the blood (viral load). In this experiment, 12 pigs were inoculated with one of three different doses of FMD virus: low; medium; or high. Measurements of the viral load were recorded over a time course of approximately 11 days for every 8 hours. The model is a set of deterministic differential equations with the following variables: viral load; virus in the interstitial space; and the proportion of epithelial cells available for infection, infected and uninfected. The model was fitted to the data for each animal individually and also simultaneously over all animals varying only the initial dose. We show that the general trend in the data can be explained by varying only the initial dose. The higher the initial dose the earlier the development of a detectable viral load.     

圆铝杆铸坯裂纹形成机理及影响因素探究

通过对铸造凝固过程的跟踪试验、铸造组织分析,并结合生产实践长期总结,分析了纯铝系圆铝杆铸坯不同位置铸造裂纹的性质、形成机理及主要的影响因素.通过工艺改进和新技术开发后的铸坯晶粒为细小的等轴晶,热裂纹得到明显改善.     

遵钢水处理工程一次铁皮沉淀池沉井施工技术

施工中常用的沉井大都是圆形的,介绍的沉井是长方形且尺寸较大,下沉过程中会有一些难度,针对遵钢一次铁皮沉淀池实例详细介绍沉井下沉、封底砼厚度验算、沉井稳定性验算、封底后抗浮稳定性验算等的计算方法,叙述了沉井制作、下沉施工过程及沉井施工中常见问题的预防措施和治理方法     

一组非奇异H-矩阵的新判据

非奇异H-矩阵是一类很重要的特殊矩阵,它在数值分析和矩阵理论的研究中非常重要,在控制论、经济数学等众多领域有着广泛的应用,但在实际中要判定非奇异H-矩阵是有困难的.在本文中,我们对方阵的非对角占优行标集做细分,巧妙地构造了相应的正对角矩阵,给出了一组非奇异H-矩阵的新判据,改进了近期的相关结果,并用数值算例说明了新判据...