广义等距曲线的分析性质

文章定义了广义等距曲线的矢量表达式,具体求出了广义等距曲线的曲率、弧长等一系列分析性质,使广义等距曲线在应用时更加方便.     

Pattern formation in mutation of "Game of Life"

This paper presents pattern formation in generalized cellular automata (GCA) by varying parameters of classic “game Experiments show the emergence of the self-organizing patterns that is analogous with life forms at the edge of chaos, which consist of certain nontrivial structure and go through periods of growth, maturity and death. We describe these experiments and discuss their potential as alternative way for creating artificial life and generative art, and as a new method for pattern genesis.     

带干扰的广义泊松过程模型及其破产概率

在一般的风险模型中，都假定保险公司的保费收入为时间的线性函数，但在实际情况中，保险公司的保费收入与保险公司售出的保单数和每份保单的保额有关．在保险理赔的广义泊松过程模型中，加入扩散扰动项，并假定保费收入为一泊松过程，建立起新的模型，证明了新模型下的破产概率满足Lundberg不等式．     

变时滞大系统的振动性理论及应用

本文将纯量时滞泛函微分方程解的振动性理论推广到时滞大系统;通过引进V函数,获得了线性及非线性变时滞大系统振动的充分条件。     

Particle Swarm Optimization based predictive control of Proton Exchange Membrane Fuel Cell （PEMFC）

INTRODUCTION Fuel cells have attracted more attention in the last few years due to scarcity of the world energy source. The Proton Exchange Membrane Fuel Cell (PEMFC) is the focus of current development efforts because it is capable of higher power density and faster start-up than other fuel cells (Zhang et al., 2004). Research emphasis is on high power density with adequate energy conversion efficiency. PEMFC performance is related to many factors, among which electrolyte membrane …     

‘Next thing you know,her hair turned green’: absurdity and uncertainty in high-stakes teacher test space

This article explores what happens behind the closed doors and in the ‘black box’ of high-stakes educational testing. Our specific concern is licensure exams that are often gatekeepers into teacher education programs and the profession. Leveraging the spatial turn across critical social theory and other disciplines, we conceptualize the test space of these exams in order to account for the powerful reach that test companies have into teacher education and the ‘ideal’ restrictive space that test takers navigate. Against this conceptual background, we share findings from a larger qualitative study to illustrate how test takers ‘practice’ test space into something more manageable and familiar by leveraging various affordances presented to them. Overall, our study accounts for the spatial dimension of high-stakes educational tests and initiates productive ways to begin thinking about the structure and agency of these spaces.     

兼顾连笔及笔顺自由的联机手写汉字识别方法

文章将手写汉字的可见线段和不可见线段进行联合编码,并对汉字笔画编码进行加权分类,较好的解决了联机手写汉字识别中连笔及笔顺自由问题,最后采用无回溯串匹配算法实现了汉字识别。     

产品毕业对我国出口的影响及对策

随着我国的经济快速发展和出口迅猛增长，越来越多的出口产品面临着普惠制中毕业问题的困扰；随着竞争力的提高，这些产品将被取消普惠制待遇。2003年，我国不少出口欧盟的产品被取消了普惠制待遇。此时客观正确的认识和积极主动的应对具有十分重要的现实意义。毕业是取消关税优惠，毕业条款的日益严格在某种程度上反映了给惠国的贸易保护。面对毕业，只要我们积极规避，主动创新，仍会大大受益于普惠制。     

用广义坐标和Dirac符号表述的动力学方程

讨论Dirac符号在经典力学中的应用，给出一种用广义坐标和Dirac符号表述的动力学方程，并举例说明该方程的广泛应用。     

变易理论在大学数学课堂教学中照顾学习差异的启示

变易理论指出,要正确认识某事物,就应该分离出该事物的关键特征,运用变易图式加以对比,可以有效达到对关键属性的辨析。以"变易理论"作为大学数学教学设计的理论指导,可以有效改善教与学,照顾学习差异帮助学生掌握学习内容,有利于教学质量的提高。