对四苯硼化钠比浊法标准曲线线性关系的研究

用四苯硼化钠比浊法测钾时,加入甲醛和聚乙烯醇溶液,将使标准曲线的线性关系得到改善,从而提高了四苯硼化钠比浊法的精密度。     

洛仑兹曲线与基尼系数的应用

基于洛仑兹曲线详细地分析了收入分配差别的基尼系数及其计算方法。结合统计年鉴的数据，计算了我国目前的基尼系数，指出了基尼系数的不足并介绍了收入分配差别变化的一般规律。     

Shape blending of artistic brushstroke represented by disk B-spline curves

This paper presents an algorithm for automatically generating in-between frames of two artistic brushstrokes. The basic idea of the algorithm is to represent the two key frames of artistic brushstrokes in disk B-spline curves, and then make blending of their geometric intrinsic variables. Given two key frames of artistic brushstrokes, the skeleton curves can be obtained by certain skeleton-based techniques. After disk B-spline representation of the key frames is generated, interpolation of the intrinsic variables of the initial and the target disk B-spline curves is carried out. Examples show that this method can efficiently create in-between frames of artistic brushstrokes.     

热力学分析在连续镀锌过程中的应用

热力学分析结合相图研究可用于解决生产实际问题。在连续镀锌过程中，锌液中铝是一种很重要的添加元素。它对镀锌质量有直接的影响。但锌池中铝含量的测量与控制还存在困难。在对Fe-Zn-Al三元体系Fe溶解度曲线的热力学分析的基础上，用Matlab编制了事家图形用户界面的程序，把热力学分析应用于计算锌池中的有效铝含量，将有助于热镀锌工业实现对铝含量的控制。     

Modeling and Forecasting the Yield Curve by an Extended Nelson‐Siegel Class of Models: A Quantile Autoregression Approach

This paper compares the in‐sample fitting and the out‐of‐sample forecasting performances of four distinct Nelson–Siegel class models: Nelson–Siegel, Bliss, Svensson, and a five‐factor model we propose in order to enhance the fitting flexibility. The introduction of the fifth factor resulted in superior adjustment to the data. For the forecasting exercise the paper contrasts the performances of the term structure models in association with the following econometric methods: quantile autoregression evaluated at the median, VAR, AR, and a random walk. As a pattern, the quantile procedure delivered the best results for longer forecasting horizons. Copyright © 2011 John Wiley & Sons, Ltd.     

Optimal Control of Teaching Process

It is clearly illustrated in[1 ] ,the quantity analysis of the dynamic process of teachingeffects has been clearly illustrated in the first reference,according to which we areinformed of the mathematic model of the teaching process;the function of teachers dwingthe process;as well as the influere on the process of comprehending ofthe students causedby several different functions.But that confines in the specific relationship betweenteaching and learly as far as a single different class,a concre…     

微型点阵打印机曲线绘制程序设计

着重分析了微型点阵打印机点阵图样打印输出功能，详细介绍了为其扩展二维曲线绘制功能的软件程序设计方法，为今后更好地应用该型号打印机奠定了基础。     

河南省原煤产量时间序列动态模型研究

本研究以河南省 1949～ 1998年 49年原煤产量的档案资料作为研究材料 ,采用计算机处理模拟出时间序列动态数学模型 45个 ,从中选出 7个最优回归模型 ,并以模型对未来年份原煤产量进行预测。同时绘制折线图、曲线图 7个     

有关与轴线成定角的螺旋铣刀刃口设计问题

指出了对于球面螺旋铣刀、带角圆的螺旋铣刀不宜采用与轴线成定解的定义来设计螺旋刃口，并给出了其数学上严格证明和直观分析，为同类研究提供了借鉴。     

机械手手部位姿的数值模拟

该文论述了拟合由若干个离散点的曲线Ｌ及其基本矢的正交多项式法（ＯＰＭ）和三次样条函数法（ＣＳＭ），当离散点为曲线Ｌ上的精确点时使用ＣＳＭ更精确，而当离散点是曲线Ｌ的非精确点使用ＯＰＭ更实用。实例计算验证了这两种方法的有效性，由于拟合结果是以多项式表示的曲线方程，因此可方便地用于机械手的实时控制，使其手部掌心沿拟合曲线运动，而其手部姿态拟合曲线的基本矢确定。