A Fast Wavelet Algorithm for Analyzing One-Dimensional Signal Processing and Asymptotic Distribution of Wavelet Coefficients With Numerical Example and Simulation

In this article, we consider a sample point (t _j , s _j ) including a value s _j  = f(t _j ) at height s _j and abscissa (time or location) t _j . We apply wavelet decomposition by using shifts and dilations of the basic Häar transform and obtain an algorithm to analyze a signal or function f. We use this algorithm in practical to approximating function by numerical example. Some relationships between wavelets coefficients and asymptotic distribution of wavelet coefficients are investigated. At the end, we illustrate the results on simulated data by using MATLAB and R software.     

Comparison of intracalss correlation coefficients with the ratio of two independent f-statistics

The ratio of analysis of variance F-statistics is proposed as a test criterion for comparing the intraclass correlation coefficients of two independent groups of classes. Selected percentage points of this ratio’s distribution are tabulated for the special case when there are two observations in each class. Such tables should be useful when investigating heritability from a study of identical and nonidentical twin pairs.     

Exact factorization of the spectral density ann its application to wrf,castiilg and time series analysis

Let f be the spectral density function of a purely nondeterministic stationary stochastic process and be the optimal (canonical) fator of f. The role of the coefficients c_n and d_n (n ≥ 0) of φ and φ^?1 respectivey, in prediction, filtering and control theory is well-knwn. We show that the c_n's and d_n's can be obtained recursively in terms of the Fourier coefficients of log f. Also, recursive and updating formulae fr the kolmogorovwiener predictor similar to those Box-Jenkins are provided..     

产业关联测度方法的改进及应用——基于OECD非竞争型投入产出表的分析

影响力系数是产业关联测度中重要的分析工具,然而影响力系数的传统测算公式存在诸多缺陷。综述了影响力系数的传统测算公式中存在的主要缺陷;在此基础上综合考虑了产业结构(份额)、衡量标准以及中间投入的国内外区分等因素,对影响力系数的传统测算公式进行了改进;在中国的非竞争型投入产出表的基础上,比较分析了影响力系数测算公式改进前后计算结果的差异。     

Shape Constrained Non‐parametric Estimators of the Baseline Distribution in Cox Proportional Hazards Model

Abstract. We investigate non‐parametric estimation of a monotone baseline hazard and a decreasing baseline density within the Cox model. Two estimators of a non‐decreasing baseline hazard function are proposed. We derive the non‐parametric maximum likelihood estimator and consider a Grenander type estimator, defined as the left‐hand slope of the greatest convex minorant of the Breslow estimator. We demonstrate that the two estimators are strongly consistent and asymptotically equivalent and derive their common limit distribution at a fixed point. Both estimators of a non‐increasing baseline hazard and their asymptotic properties are obtained in a similar manner. Furthermore, we introduce a Grenander type estimator for a non‐increasing baseline density, defined as the left‐hand slope of the least concave majorant of an estimator of the baseline cumulative distribution function, derived from the Breslow estimator. We show that this estimator is strongly consistent and derive its asymptotic distribution at a fixed point.     

西方绘画传统中形状意识的传承与演变

形状意识是人们对于客观世界以及客观物象所具有的外形意识,是传统绘画中最基本的造型意识之一,画家通过它来表现二维或三维的客观世界和主体内在的精神世界。在西方绘画传统中,这种意识的延续可分为生成、发展和演变三个阶段。而西方绘画所取得的伟大成就,与形状意识的传承与演变是分不开的。     

从“事件”到“用例事件”——从意识的涌现看句子表达式雏形的形成

句子表达式雏形的形成,是指意识所涌现出来的句子表达式的基本框架.为了说明这个过程的意识涌现,需要提到四对相关的概念:感知-感受;物理属性-心理属性;原初意识-反思意识;事件-用例事件.从意识视角来审视,语言表达式雏形的形成来自原初意识涌现为反思意识,即将感知事件的原初意识在个人记忆和过去经验的基础上经过联想和想象,对原初意识实施格式塔转换,扩展为反思意识.在这一过程中,要用上什么原初意识的材料、如何通过格式塔效应实施联想和想象,都是在环境和意向性的统制下进行的;这个反思过程,就是要把原初意识所映现的事件“裁剪”为用例事件,使这用例事件能在该特定情景下恰当地对该事件作出切合语境的表征.     

西柏坡高速2×67 m同步转体曲线T构称重试验研究

石家庄西柏坡高速公路田家庄互通立交跨越京广铁路货迁线,为一联2×67 m双幅曲线预应力混凝土T型刚构结构,采用同步转体施工方案,为保证转体工序的顺利进行,转体前应采取措施使T 构在两个方向达到平衡。为此,确定其是否平衡的称重试验和试转工作是必不缺少的。介绍了该桥称重试验的原理主要内容及步骤,介绍了称重试验中数据处理的方法,并对试验结果进行了分析,提出T构平衡配重的方案,工程结果显示效果良好。     

三维网站动态形状及其视觉体验——基于Superformula公式的研究

相对于传统二维形式的网站,三维网站提供了更高仿真度的立体影像和更高自由度的交互方式,为用户提供了全新的视觉和交互体验。但同时也要求三维网站中的三维形状要具有比较高的拟真度、传输速度和生成速度。采用基于Superformula公式的建模方法,具有单一公式生成非对称三维动态形状的能力,可以满足受众对于在互联网上浏览三维网站的速度及图像质量的要求,非常适合生成三维网站中的三维形状。基于Superformula公式生成的三维动态形状,将给受众带来前所未有的积极视觉体验。     

Estimating the Return to Schooling: Progress on Some Persistent Econometric Problems

This paper reviews a set of recent studies that have attempted to measure the causal effect of education on labor market earnings by using institutional features of the supply side of the education system as exogenous determinants of schooling outcomes. A simple theoretical model that highlights the role of comparative advantage in the optimal schooling decision is presented and used to motivate an extended discussion of econometric issues, including the properties of ordinary least squares and instrumental variables estimators. A review of studies that have used compulsory schooling laws, differences in the accessibility of schools, and similar features as instrumental variables for completed education, reveals that the resulting estimates of the return to schooling are typically as big or bigger than the corresponding ordinary least squares estimates. One interpretation of this finding is that marginal returns to education among the low‐education subgroups typically affected by supply‐side innovations tend to be relatively high, reflecting their high marginal costs of schooling, rather than low ability that limits their return to education.