浅析中国画构图中的取势

取势在中国画构图中非常重要,一幅画的成功与否取势起了决定性的作用.本文通过对花鸟画、山水画构图中的取势运用进行了分析与研究,揭示了取形用势的规律和方法.     

数形结合在解题中的应用

本文就数形结合思想在解题中的应用问题，从由形化数和由数化形两个方面进行研究。在由形化数一块内容中主要用解析法、判别式法、复数法、面积（体积）法、代数三角法五方面通过代数方法解决某些几何问题；在由数化形一块内容中主要论述运用构造法和函数图像法解决一些代数问题。     

Parametric Multiplicative Intensities Models Fitted to Bus Motor Failure Data

Classes of two- and three-parameter multiplicative intensities models are presented. These have the advantage that they can be simply fitted by standard software. The two-parameter models include the Weibull and extreme value models, whereas the three-parameter models can have bathtub-shaped forms. The bus motor failure data are reanalysed to show that all five failures of the 191 buses can be adequately described by the same two-parameter multiplicative intensity model based on the squared logarithm of distance travelled in service since previous repair. This is a new member of the multiplicative intensity family, based on the squared logarithm of distance, or of time for survival data.     

Consistency of Procrustes Estimators

Lele has shown that the Procrustes estimator of form is inconsistent and raised the question about the consistency of the Procrustes estimator of shape. In this paper the consistency of estimators of form and shape is studied under various assumptions. In particular, it is shown that the Procrustes estimator of shape is consistent under the assumption of an isotropic error distribution and that consistency breaks down if the assumption of isotropy is relaxed. The relevance of these results for practical shape analysis is discussed. As a by-product, some new results are derived for the offset uniform distribution from directional data.     

连续铸造灰铁管内沟形成机理的探讨

本文通过测量内结晶器的变形,研究了内沟与石墨化膨胀及内结晶器变形的关系,指出了产生内沟的原因及其位置,为减少内沟提供了一定根据。     

论建筑的艺术意蕴

建筑艺术是一种实用与审美相结合的艺术 ,是建筑师在掌握艺术媒介物质的自然属性及其规律的基础上 ,创造出来的体现一定生活内容的艺术形象。建筑师在进行艺术设计与艺术构造时 ,应充分注意功能与审美的协调、契合民众审美情趣、体现时代精神、展示民族特色等美学原则。     

On the Relation between Edge and Vertex Modelling in Shape Analysis

Objects in the plane with no obvious landmarks can be described by either vertex transformation vectors or edge transformation vectors. In this paper we provide the relation between the two transformation vectors. Grenander & Miller (1994 ) use a multivariate normal distribution with a block circulant covariance matrix to model the edge transformation vector. This type of model is also feasible for the vertex transformation vector and in certain cases the free parameters of the two models match up in a simple way. A vertex model and an edge model are applied to a data set of sand particles to explore shape variability.     

基于Parks-McClellan算法的超宽带脉冲波形优化设计

基于Parks-McClellan算法讨论并分析了一种超宽带无线脉冲波形的优化设计方法,利用该方法设计得到的超宽带脉冲波形可以充分利用并且满足FCC的频谱要求。相应的结果既适用于单频带模式超宽带系统,也适用于多频带模式超宽带系统。     

The Freshman 15—A Closer Look

Abstract

Objectives and Participants: Changes in body weight, composition, and size were examined in college freshmen at the beginning (initial, n = 240) and end of fall semester 2007 (n = 214) and the end of spring semester 2008 (n = 205). Methods: Height, weight, body composition, and waist and hip measurements were assessed. Results: Mean weight, body mass index (BMI), absolute and percent body fat all increased significantly over fall semester and the academic year. About 31% of freshmen lost ≥5 lbs. Mean academic year weight gain was 2.6 lbs (entire group) and 6.0 lbs (weight gainers); body fat increased by 4.4 lbs in the weight gainers. A significant correlation (r = .509) was found between weight change and waist circumference change, but not between weight change and waist to hip ratio change. Conclusions: Freshmen weight gain is associated with increases in body fat and waist circumference, which may be troublesome should the trend continue throughout college.     

Statistical theory of shape under elliptical models via QR decomposition

The statistical shape theory via QR decomposition and based on Gaussian and isotropic models is extended in this paper to the families of non-isotropic elliptical distributions. The new shape distributions are easily computable and then the inference procedure can be studied with the resulting exact densities. An application in Biology is studied under two Kotz models, the best distribution (non-Gaussian) is selected by using a modified Bayesian information criterion (BIC)*.