基于灰色聚类的大规模群体语言评价信息集结研究

研究群体规模较大的情况下基于语言评价信息的决策方法,提出了基于灰色关联聚类的方法以降低大规模群体的协调困难;根据决策者所属群体类别差异,基于语言信息转化函数提出了类内评价指标权重确定方法,并测算了各群体类别的综合偏好;研究群体类间权重确定模型,建立了基于群体类别意见偏差最小的群体偏好集结模型;进而提出了决策者判断一致度定义以及决策者偏差协调方法.算例分析表明了该方法的应用步骤及可行性.     

尺度与颜色不变性图像特征描述

尺度不变特征变换是目前公认的鲁棒性最强的图像特征描述方法之一,在尺度不变性和几何不变性方面具有较好的特性,但该方法主要适用于灰度图像,对图像颜色的区分能力不强,因此,一些对象可能会因为颜色的不同而被错误的区分.另外,尺度不变特征变换对关键点局部范围内描述子主方向的依赖性非常强,直接决定了匹配的正确率,但是研究表明,主方向分配产生的误差仅有三分之二左右能控制在[-20。,+20。]范围内,因此部分特征会有三分之一的概率因为主方向分配的误差较大而不能正确匹配.针对以上两个问题,本文提出了一种具有颜色和尺度不变性的局部特征描述方法,颜色不变性通过将RGB图像转换到高斯颜色模型下实现,特征描述过程中不再分配主方向,而用局部相对方向,尺度不变性通过构建高斯金子塔实现.实验选取阿姆斯特丹数据集图像进行了测试,结果表明本文方法比传统尺度不变特征变换方法,在特征点的数目、分布均匀性以及匹配精度方面均有所提高.     

烟草制丝线电子皮带秤应用热点解析

为使烟草行业用户对电子皮带秤的招标技术要求更加合理,并为皮带秤制造厂商提供行业应用意见,对皮带秤的直接承重式结构、宽范围流量调节、6线制传感器、伺服电机、纠偏方法、校验方式、数据修饰等热点问题进行了分析。结果表明:目前直接承重式结构已适用于烟草行业皮带秤;实现宽流量范围不能忽略变速对计量精度的影响;6线制传感器和伺服电机仅在特定条件下才有必要使用;电动纠偏结合机械纠偏效果最好;抛码校验方式更适用;数据修饰无任何好处,反而易造成事故隐患。     

烧结生产自动配料控制系统

介绍了烧结生产自动配料控制系统的组成及工作原理.控制系统采用上下两级的计算机控制形式,并在系统的设计中,根据生产的实际情况采用了新的控制思想和控制方法.     

一种大时滞系统的无模型自适应控制改进算法

利用无模型自适应控制（Model—freeadaptive control,MFAC）方法仅需要被控对象输入和输出数据,而不需要其他任何信息的优点。针对工业生产过程中普遍存在的大时问滞后的特点,提出针对未知模型的大时滞对象的无模型自适应控制改进算法（Improved MFAC on Large Time—delay System,LTDS-IMFAC）。在改进算法中,在基本无模型自适应控制算法的基础上引入了带有滞后时间的输入变化率的约束项．以此来减小大时间滞后对整个控制过程的影响。通过MATLAB仿真试验证明了改进算法对于大时滞系统的控制具有较好的有效性。     

Measuring characteristic length scales of eigenfunctions of Sturm–Liouville equations in one and two dimensions

The spatial resolution of eigenfunctions of Sturm–Liouville equations in one-dimension is frequently measured by examining the minimum distance between their roots. For example, it is well known that the roots of polynomials on finite domains cluster like O(1/N ²) near the boundaries. This technique works well in one dimension, and in higher dimensions that are tensor products of one-dimensional eigenfunctions. However, for non-tensor-product eigenfunctions, finding good interpolation points is much more complicated than finding the roots of eigenfunctions. In fact, in some cases, even quasi-optimal interpolation points are unknown. In this work an alternative measure, ℓ, is proposed for estimating the characteristic length scale of eigenfunctions of Sturm–Liouville equations that does not rely on knowledge of the roots. It is first shown that ℓ is a reasonable measure for evaluating the eigenfunctions since in one dimension it recovers known results. Then results are presented in higher dimensions. It is shown that for tensor products of one-dimensional eigenfunctions in the square the results reduce trivially to the one-dimensional result. For the non-tensor product Proriol polynomials, there are quasi-optimal interpolation points (Fekete points). Comparing the minimum distance between Fekete points to ℓ shows that ℓ is a reasonably good measure of the characteristic length scale in two dimensions as well. The measure is finally applied to the non-tensor product generalized eigenfunctions in the triangle proposed by Taylor MA, Wingate BA [(2006) J Engng Math, accepted] where optimal interpolation points are unknown. While some of the eigenfunctions have larger characteristic length scales than the Proriol polynomials, others show little improvement.     

Degenerate scale for the analysis of circular thin plate using the boundary integral equation method and boundary element methods

In this paper, the degenerate scale for plate problem is studied. For the continuous model, we use the null-field integral equation, Fourier series and the series expansion in terms of degenerate kernel for fundamental solutions to examine the solvability of BIEM for circular thin plates. Any two of the four boundary integral equations in the plate formulation may be chosen. For the discrete model, the circulant is employed to determine the rank deficiency of the influence matrix. Both approaches, continuous and discrete models, lead to the same result of degenerate scale. We study the nonunique solution analytically for the circular plate and find degenerate scales. The similar properties of solvability condition between the membrane (Laplace) and plate (biharmonic) problems are also examined. The number of degenerate scales for the six boundary integral formulations is also determined. Tel.: 886-2-2462-2192-ext. 6140 or 6177     

首钢新建35000m^3／h空分设备的流程及特点

简介了首钢氧气厂新建35000m^3／h空分设备的工艺流程及技术参数，详细分析了常规变负荷和快速变负荷调节时空分设备的运行工况以及快速变负荷调节时的工艺特点。     

分子筛吸附器进水故障及其处理过程

KDONAr-10000／22000／370型空分设备因空冷塔液位计失效而发生分子筛吸附器进水故障。介绍了故障发生的经过和处理过程；最后得出了发现及处理分子筛吸附器进水故障的经验和教训。     

60000m^3／h空分设备快速变工况生产的操作探讨与实践

为降低60000m^3／h空分设备的氧气放散率，武钢氧气公司实施了空分设备的手动快速变工况生产。分析了空分设备运行工况不稳定和自动变工况系统难以实施的原因，介绍了手动快速变工况的理论依据、前期准备工作和实施过程，阐述了手动快速变工况实施进程中应注意的事项。