大钟与六位密码

福尔摩西接到电话的时候正在翻看一本关于城中富翁艾伦王的传奇故事。艾伦王年少时靠贩卖廉价的小闹钟起家,经过几十年的辛勤努力,把自己的事业拓展成了最有名的钟表公司,是本市最有名的富翁。艾伦王年纪已经很大了,身体也不好。他的儿女众多,但是他们和艾伦王的关系并不融洽。大家都猜测他们对艾伦王的财富虎视眈眈。"喂,福尔摩西吗?"约翰焦急的声音从电话那头传过来。"是我。"福尔摩西回应道。     

直击你心目中的商学院

MBA是一个藏龙卧虎的地方。 那里有着无数中国企业界的精英．但那里他们不是在刺刀见红的商场上拼搏，也不是在如履薄冰的谈判桌上相持。而是在毫无商业利益的坦诚中相识．相聚．相知。在这里没有一个人再是叱咤商界的大腕，或者主管一方的大员。他们有一个共同的身份——同学。     

图解游戏

我在这里!放学后,我和我的朋友在公园里玩。我用一个个小黑点来表示我和我的朋友们。你可能已经猜到那个最大的点就是我。我画一个圆圈把我们圈起来,表示我们是同一组的。你是不是很想知道,在我们这一组里谁是男生谁是女生?但是太糟糕了,他们都只是一个点而已。你甚至不知道我是男生还是女生。     

精灵女王

正看了这幅图,我是这样写这个故事的——苏珊是精灵国的精灵女王。有一天,苏珊在王宫的花园里捉到一只毛毛虫。苏珊把它小心地放进玻璃瓶里,精心喂养。不久,这只毛毛虫就表现出与一般毛毛虫不一样的特性来。它会做人类的各种表情,老是逗得苏珊哈哈大笑。苏珊更爱它了。     

我是暴龙

正我是暴龙,又叫霸王龙。我的嘴巴很大,牙齿锋利,食量也大,一口能吞下一头牛。大家一直以为我是最庞大的肉食恐龙,其实不然。迄今为止,科学家们发现的最大的肉食恐龙是南方巨兽龙。我真想跟它比试一下,看谁更凶猛。     

对破坏者的审判

通过“初级探险者测试”后,贝卡和乐天蚁在热带雨林中度过了一段快乐的时光。尽管凶险无数。雨林的美还是让两只蚂蚁无比惊叹。他们学会了射箭、扎鱼。也了解了土著的很多令人讶异的习俗。这天,他们听到了一个坏消息——有些唯利是圈的人正在疯狂地破坏热带雨林。雨林里的居民们发誓要严惩作恶者,因为失去森林他们就会失去一切——家、食物和生活用品。贝卡和乐天蚁看着眼前荒凉的树桩,心里也充满愤怒。     

地毯变形记

正1.古拉格有一个长宽都是13分米的小地毯。他想把它改成一个8分米宽21分米长的地毯。于是他拿着小地毯去找裁缝。2.古拉格:亲爱的朋友,我想请你帮我把这块小地毯分割成4片,然后把它们缝成8×21大小的地毯。裁缝:抱歉,古拉格,你的算术太糟糕了。13×13是169,而8×21是168。那是做不出来的。3.古拉格:亲爱的朋友,我说的不会错。像我这样把这块小地毯分割成4片。4.裁缝按照古拉格画的尺寸,将地毯分割成4片,然后把它们拼好,重新缝成一块8×21的地毯。裁缝:我简直不敢相信!面积从169缩     

小裁缝和巨人

正夏天的一个早晨,小裁缝正在吃早餐。这时,果酱香甜的气味招来了一群聚在墙上的苍蝇。"不许抢我的果酱!"小裁缝赶着苍蝇,可是苍蝇还是越聚越多。小裁缝随手抓起一条毛巾,朝着苍蝇狠命地打了下去,一下子打死了七只苍蝇。"哦,勇敢的小裁缝,你可真了不起!"他说道,全世界的人都应该知道你的壮举。"说罢,小裁缝     

攻克两位数乘多位数乘法的教学难点

珠心算加减部分的教学,是所有从事珠心算教学工作的老师都必须很好掌握的。是初级阶段教学内容的重中之重。俗称基本功部分。但当教学到乘法时有的老师就有点茫然了。本人为此进行了多年的探索研究．找到了以两位数乘以多位数的比较简洁的教学方法．笔者用教案形式做一阐述。     

珠算进入2011版《数学课程标准》的参与经过

2011版《国家数学课程标准》,将珠算重新纳入小学数学内容。这是一个曲折的过程。我曾经参与其事,做过一些沟通和劝说的工作。以下是我关于珠算的心路历程和参与经历。我出生在江南县城奉化。父亲是"库房出身",即少年时期就进入征收农业税的部门学生意。算盘是     

Qualitative Analysis of Bifurcating Solutions in the Lengyel-Epstein Model

One of the most fundamental problems in theoretical biology is to explain the mechanisms by which patterns and forms are created in the＇living world. In his seminal paper ＂The Chemical Basis of Morphogenesis＂, Turing showed that a system of coupled reaction-diffusion equations can be used to describe patterns and forms in biological systems. However, the first experimental evidence to the Turing patterns was observed by De Kepper and her associates（1990） on the CIMA reaction in an open unstirred reactor, almost 40 years after Turing＇s prediction. Lengyel and Epstein characterized this famous experiment using a system of reaction-diffusion equations. The Lengyel-Epstein model is in the form as follows     

(0,1 ;0)-INTERPOLATION ON INFINITE INTERVAL (-∞, +∞)

In this paper, we study the explicit representation and convergence of (0, 1; 0)-interpolation on infinite interval, which means to determine a polynomial of degree ≤ 3n - 2 when the function values are prescribed at two set of points namely the zeros of Hn(x) and H′n(x) and the first derivatives at the zeros of H′n(x).     

RECENT PROGRESS ON SPHERICAL HARMONIC APPROXIMATION MADE BY BNU RESEARCH GROUP ——In memory of Professor Sun Yongsheng

As early as in 1990, Professor Sun Yongsheng, suggested his students at Beijing Normal University to consider research problems on the unit sphere. Under his guidance and encouragement his students started the research on spherical harmonic analysis and approximation. In this paper, we incompletely introduce the main achievements in this area obtained by our group and relative researchers during recent 5 years （2001-2005）. The main topics are： convergence of Cesaro summability, a.e. and strong summability of Fourier-Laplace series; smoothness and K-functionals; Kolmogorov and linear widths.     

On a class of self-similar processes with stationary increments in higher order Wiener chaoses

We study a class of self-similar processes with stationary increments belonging to higher order Wiener chaoses which are similar to Hermite processes. We obtain an almost sure wavelet-like expansion of these processes. This allows us to compute the pointwise and local Hölder regularity of sample paths and to analyse their behaviour at infinity. We also provide some results on the Hausdorff dimension of the range and graphs of multidimensional anisotropic self-similar processes with stationary increments defined by multiple Wiener–Itô integrals.     

A REPRESENTATION FORMULA RELATED TO SCHR(O)DINGER OPERATORS

Schr(o)dinger operator is a central subject in the mathematical study of quantum mechanics.Consider the Schrodinger operator H = -△ V on R, where △ = d2/dx2 and the potential function V is real valued. In Fourier analysis, it is well-known that a square integrable function admits an expansion with exponentials as eigenfunctions of -△. A natural conjecture is that an L2 function admits a similar expansion in terms of "eigenfunctions" of H, a perturbation of the Laplacian (see [7], Ch. Ⅺ and the notes), under certain condition on V.     

On a class of Riemann surfaces

It is considered the class of Riemann surfaces with dimT1 = 0, where T1 is a subclass of exact harmonic forms which is one of the factors in the orthogonal decomposition of the spaceΩH of harmonic forms of the surface, namely The surfaces in the class OHD and the class of planar surfaces satisfy dimT1 = 0. A.Pfluger posed the question whether there might exist other surfaces outside those two classes. Here it is shown that in the case of finite genus g, we should look for a surface S with dimT1 = 0 among the surfaces of the form Sg\K , where Sg is a closed surface of genus g and K a compact set of positive harmonic measure with perfect components and very irregular boundary.     

Journal of the Operations Research Society of China Special issue on Operations Research in Healthcare Management

正Guest Editors:Hong Chen,Shanghai Jiao Tong University,Shanghai,China Guohua Wan,Shanghai Jiao Tong University,Shanghai,China David Yao,Columbia University,New York,USA Scope:Healthcare delivery worldwide has been fraught with high cost,low efficiency and poor quality of patient care service.For the field of operations research(OR),healthcare offers some of the biggest challenges as well as best opportunities in     

ANALYSIS IN THEORY AND APPLICATIONS Vol. 30, 2014 CONTENTS

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An alternative mathematical algorithm for the photo- and videokeratoscope

Due to the resolution of current laser technology, the accuracy of corneal topography as measured by the videokeratoscope is no longer adequate to provide precise enough data for refractive surgery or for the fitting of customized contact lenses. We present an algorithm for recovering corneal topography that makes use of modern differential geometric techniques and numerical descent in Sobolev spaces. We believe this algorithm may be used with the photo- and videokeratoscope to increase the accuracy of the recovered corneal topography.