Vanishing Point(消失点)滤镜的练习
制作方法如下：
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美剧中50句经典俚语完美解析 1.Clear the air 消除误会 To settle a dispute and restore good relations Example: We had a meeting with the workers, and I think we’ve cleared the air now。 2.Be in the air 将要发生的事情 The feeling or idea that something new is about to happen or is going to change。 Example: From the arguments going on at the meeting, it seems that a change in pol-icy is in the air。 3.A bad egg 缺乏道德的人 Somebody who has no moral principles and should be avoided Example: You mustn’t lend Tim money, he’s a bad egg. You’ll never see him or your money again! 4.Cost an arm and a leg 极其昂贵 To be very expensive Example: I love that fur coat. However, I don’t think I’m going to buy it be-cause it costs an arm and a leg。 5.In the balance 未知的，不可预测的 Said when the outcome of a situation is unknown or unpredictable Example: His career as a pilot is in the balance, as his eyesight does not seem good enough。 6.In the Bag 稳操胜券 Said of an achievement which is secure Example: We have the deal in the bag. The client came in this morning to sign the agreement。 7.Drive a hard bargain 极力讨价还价 To have the negotiating strength and skills to get the most advantageous price and conditions Example: Amanda is negotiating the best price from the suppliers. She drives a hard bargain。 8.Ring a bell 看上去或听起来非常熟悉 To look, sound or seem familiar Example: That face rings a bell, where have I seen him before? 9.Tighten one’s belt 节衣缩食 To cut down on spending because there is less income than before Example: Now you are out of work, you’ll have to tighten your belt and give up buying new clothes and going out so often。 10.Kill two birds with one stone 一石二鸟 To complete two tasks together, with less effort than doing them separately
几种特殊类型函数的积分 一、有理函数的不定积分 1.化有理函数为简单函数 两个多项式的商所表示的函数)(x R 称为有理函数，即 m m m m m n n n n n b x b x b x b x b a x a x a x a x a x Q x P x R ++++++++++= =------122110122110)()()( （1） 其中n 和m 是非负整数；n a a a a ,,,,210 及m b b b b ,,,,210 都是实数，并且 0,000≠≠b a ． 当（1）式的分子多项式的次数n 小于其分母多项式的次数m ，即m n <时，称为有理真分式；当m n ≥时，称为有理假分式． 对于任一假分式，我们总可以利用多项式的除法，将它化为一个多项式和一 个真分式之和的形式．例如 1 2)1(11222 4+++-=+++x x x x x x ． 多项式的积分容易求得，下面只讨论真分式的积分问题． 设有理函数（1）式中m n <，如果多项式)(x Q 在实数范围内能分解成一次因式和二次质因式的乘积： μλβα)()()()()(220s rx x q px x b x a x b x Q ++++--= ． 其中s r q p b a ,,,,,,, 为实数；042<-q p ，…，042<-s r ；,,,βα μλ,, 为正整数，那末根据代数理论可知，真分式) () (x Q x P 总可以分解成如下部分分式之和，即 β ααα)()()()() (1121b x B a x A a x A a x A x Q x P -++-++-+-=- λ ββ) ()(21 112q px x N x M b x B b x B ++++-++-+ - μλλλ)()(21121222s rx x S x R q px x N x M q px x N x M ++++ ++++++++++ - s rx x S x R s rx x S x R +++++++++ -2 122 2)(μμμ ． （2）
人们总以为淡水是取之不尽的，实际上淡水资源是很有限的。请谈谈你的看法。 It is generally believed that there is a good supply of fresh water. But to our disappointment, the fact is just the opposite. As we can see, the world population is growing rapidly day by day. So enough fresh water is needed to feed such a big population. What's more, with the development of industry, factories and vehicles produce poisonous gases or wastes, which consequently results in the pollution of water. Though fresh, a good amount of it can no longer be used. Only quite limited fresh water resource is available to human beings. So it's high time for us human beings to take quick action to protect water resource. Stop pollution and save water, otherwise, we cannot survive on the earth. With fresh water, the world will be prosperous. 5, 4, 3, 2, 1 Ignite! Go! On October 15, 2003, China launched its first manned spacecraft into orbit from the Jiuquan Satellite Launch Centre in Northwest China's Gansu Province. Spraying a mass of orange flames, the large, white Long March II-F rocket carrying the Shenzhou-V spacecraft and China's first astronaut Yang Liwei soared spectacularly skyward, gradually becoming a bright ball before vanishing into deep space. As the world's largest developing country, China is more than proud of making its own contribution to human beings' outer space exploration. Meantime, it will turn out to be an important driving force for the country's economic and social development. The successful launch of Shenzhou-V ushered in a new chapter in space history. “5，4，3，2，1。点火!发射!”2003年10月15日，中国在其西北部的甘肃省酒泉卫星发射中心首次发射了载人宇宙飞船，进入了轨道。 喷射出一团橘黄色的火焰后，巨大白色的长征n-F火箭运载神州5号宇宙飞船和中国第一个宇宙飞行员杨利伟腾空而起，蔚为壮观，慢慢地变成一个亮球消失在茫茫的太空中。 作为世界上最大的发展中国家，中国为其对人类的空间探索作出自己的贡献感到非常骄傲。同时，这一事件将证明对中国的经济和社会发展起到重要的推动作用。神州5号宇宙飞船的发射成功揭开了太空历史的新篇章。
小波的几个术语及常见的小波基介绍 本篇是这段时间学习小波变换的一个收尾，了解一下常见的小波函数，混个脸熟，知道一下常见的几个术语，有个印象即可，这里就当是先作一个备忘录，以后若有需要再深入研究。 一、小波基选择标准 小波变换不同于傅里叶变换，根据小波母函数的不同，小波变换的结果也不尽相同。现实中到底选择使用哪一种小波的标准一般有以下几点： 1、支撑长度 小波函数Ψ(t)、Ψ(ω)、尺度函数φ(t)和φ(ω)的支撑区间，是当时间或频率趋向于无穷大时，Ψ(t)、Ψ(ω)、φ(t)和φ(ω)从一个有限值收敛到0的长度。支撑长度越长，一般需要耗费更多的计算时间，且产生更多高幅值的小波系数。大部分应用选择支撑长度为5~9之间的小波，因为支撑长度太长会产生边界问题，支撑长度太短消失矩太低，不利于信号能量的集中。 这里常常见到“紧支撑”的概念，通俗来讲，对于函数f(x)，如果自变量x在0附近的取值范围内，f(x)能取到值；而在此之外，f(x)取值为0，那么这个函数f(x)就是紧支撑函数，而这个0附近的取值范围就叫做紧支撑集。总结为一句话就是“除在一个很小的区域外，函数为零，即函数有速降性”。 2、对称性 具有对称性的小波，在图像处理中可以很有效地避免相位畸变，因为该小波对应的滤波器具有线性相位的特点。 3、消失矩 在实际中，对基本小波往往不仅要求满足容许条件，对还要施加所谓的消失矩（Vanishing Moments）条件，使尽量多的小波系数为零或者产生尽量少的非零小波系数，这样有利于数据压缩和消除噪声。消失矩越大，就使更多的小波系数为零。但在一般情况下，消失矩越高，支撑长度也越长。所以在支撑长度和消失矩上，我们必须要折衷处理。
数学高考密码押题卷 几种特殊函数 一.选择题 1.设二次函数2()2f x ax ax c =-+在区间[0,1]上单调递减,且()(0)f m f ≤,则实数m 的取值范围是( ) A.(,0]-∞ B.[2,)+∞ C.(,0][2,)-∞+∞∪ D.[0,2] 2.在1[,2]2 x ∈上，函数2()f x x Px q =++与33 ()22x g x x =+ 在同一点取得相同的最小值，那么()f x 在1 [,2]2 x ∈上的最大值是 （ ） A. 134 B.4 C.8 D.54 3.下列四类函数中,具有性质“对任意的0,0x y >>,函数f (x)满足()()()f x y f x f y +=”的是( ) A.幂函数 B.对数函数 C.指数函数 D.余弦函数 4.函数1 2 ()f x x -=的大致图像是（ ） 5.已知函数3 ()sin 4(,)f x ax b x a b R =++∈，2(lg(log 10))5f =，则(lg(lg 2))f = （A ）5- （B ）1- （C ）3 （D ）4 6.从1,3,5,7,9这五个数中，每次取出两个不同的数分别为,a b ，共可得到lg lg a b -的不同值的个数是（ ） （A ）9 （B ）10 （C ）18 （D ）20 7.若关于x 的方程 2|| 4x kx x =+有四个不同的实数解,则k 的取值范围为( ) A. (0,1) B. 1(,1)4 C.1 (,)4 +∞ D. (1,)+∞ 8.已知0x 是函数1()21x f x x =+ -的一个零点,若10(1,)x x ∈,20(,)x x ∈+∞,则( ) A.12()0,()0f x f x << B.12()0,()0f x f x <> C.12()0,()0f x f x >< D.12()0,()0f x f x >>
Transcendentalism(超验主义) Transcendentalism is literature, philosophical and literary movement that flourished in new england from about 1836 to 1860. it is the summit of American Romanticism. it originated among a small group of intellectuals who were reacting against the orthodoxy of Calvinism and the rationalism of the Unitarian Chruch, developing instead their own faith centering on the divinity of humanity and the natural world. Transcendentalism derived some of its basic idealistic concepts from romantic german philosophy, and from such english authors as coleridge and wordsworth. Its mystical aspects were partly influenced by Indian and Chinese religious teachings. Although Transcendentalism was never a rigorously systematic philosophy, it had some basic tenets that were generally shared by its adherents. The beliefs that God is immanent in each person and in nature and that individual intuition is the highest source of knowledge led to an optimistic emphasis on individualism, self-reliance, and rejection of traditional authority. The ideas of Transcendentalism were most eloquently expressed by Ralph waldo Emerson in such essays as Nature , and by Henry David Thoreau in his book Walden. 超验主义是从1836至1860于新英格兰发起的一场文学,哲学以及艺术运动.即浪漫主义的顶点.由于一小群知识分子反对加尔文教派和唯一神论教派理性的形式主义,他们从而提出人与自然的神圣这一信念.超验主义受到德国浪漫主义哲学以及英国浪漫主义作家柯勒律治和沃兹华斯的影响,还在一定程度上受到东方古典哲学和宗教的影响.尽管超验主义思想并不能算是严格意义上的哲学, 但是它还是有一些基本原则的.超验主义者认为人人都有内在的神性,只有通过接触自然才能使神性与人的天性相互融合.从而超验主义十分强调个人主义,自立,拒绝传统权威思想.超验主义思想在爱默生的<论自然> 和梭罗的<瓦尔登湖>等书中表现得淋漓尽致 Stream of consciousness(意识流)(or interior monologue) In literary criticism, Stream of consciousness denotes a literary technique which seeks to describe an individual’s point of view by giving the written equivalent of the character’s thought processes. Stream of consciousness writing is strongly associated with the modernist movement. Its introduction in the literary context, transferred from psychology, is attributed to May Sinclair. Stream of consciousness writing is usually regarded as a special form of interior monologue and is characterized by associative leaps in syntax and punctuation that can make the prose difficult to follow,tracing as they do a character’s fragmentary thoughts and sensory feelings. famous writers to employ this technique in the english language include James Joyce and William Faulkner. 学术界认为意识流是一种通过直接描述人物思维过程来寻求个人视角的文学写作技巧。意识流是现代主义运动的体现，它首先出现在心现学领域，由梅.辛克拉提出的，后引进文学领域。意识流写作通常被认为是一种特殊形式的内心独白.它的特别是联想性,以句法和标点的跳跃,文章的晦涩难懂为特征.来表现人物的片断思维和感官性直觉.比较著名的使用此技巧的有乔伊斯.福克纳. Local Colorism(乡土文学)
几种特殊函数的图象及性质 备课教师：刘彩伏 教学目标：1、理解正比例函数、反比例函数、一次函数、二次函数的概念，掌握用“待 定系数法”求这些函数的解析式的方法，能用描点法画出上述函数的图象并观 察出它们的性质。 2、能够根据二次函数解析式确定图象的顶点坐标、对称轴方程及与x 轴、y 轴 的交点，初步了解数形结合的观点，并初步学会用这些观点去分析问题的方 法。 教学重点：各种函数的概念及图象性质；“待定系数法”求函数的解析式。 教学难点：“待定系数法”求函数的解析式，用数形结合的观点分析问题的方法。 计划课时：4课时（第一课时结合图形复习各种函数概念和性质，其余三课时为题型分析 与训练） 教学过程： 一、基础知识复习 1、正比例函数 [定义]：函数y=kx(k 是常数，k ≠0)。 [图象]：经过（0，0），（1，k ）两点的直线。 [性质]：k>0时，图象在一、三象限内，y 随x 的增大而增大；k<0时，图象在 二、四象限内，y 随x 的增大而减小。 2、反比例函数 [定义]：函数x k y =(k 是常数，k ≠0)。 [图象]：双曲线。 [性质]：k>0时，图象的两个分支在一、三象限内，在每一象限内，y 随x 的增大而减小；k<0时，图象的两个分支在二、四象限内，在每一象限内，y 随x 的增大而增大；两分支都无限接近但永远不能达到两坐标轴。 3、一次函数 [定义]：函数y=kx+b(k ，b 是常数，k ≠0)。（注意：当b=0时，就成为正比例函 数） [图象]：经过（0，b ），（k b -，0）两点的直线，与直线y=kx 平行。（k 叫做直线的斜率，b 叫做直线在y 轴上的截距） [性质]：
小波的几个术语及常见 的小波基介绍 Company number：【WTUT-WT88Y-W8BBGB-BWYTT-19998】
小波的几个术语及常见的小波基介绍 本篇是这段时间学习小波变换的一个收尾，了解一下常见的小波函数，混个脸熟，知道一下常见的几个术语，有个印象即可，这里就当是先作一个备忘录，以后若有需要再深入研究。 一、小波基选择标准 小波变换不同于傅里叶变换，根据小波母函数的不同，小波变换的结果也不尽相同。现实中到底选择使用哪一种小波的标准一般有以下几点： 1、支撑长度 小波函数Ψ(t)、Ψ(ω)、尺度函数φ(t)和φ(ω)的支撑区间，是当时间或频率趋向于无穷大时，Ψ(t)、Ψ(ω)、φ(t)和φ(ω)从一个有限值收敛到0的长度。支撑长度越长，一般需要耗费更多的计算时间，且产生更多高幅值的小波系数。大部分应用选择支撑长度为5~9之间的小波，因为支撑长度太长会产生边界问题，支撑长度太短消失矩太低，不利于信号能量的集中。 这里常常见到“紧支撑”的概念，通俗来讲，对于函数f(x)，如果自变量x在0附近的取值范围内，f(x)能取到值；而在此之外，f(x)取值为0，那么这个函数f(x)就是紧支撑函数，而这个0附近的取值范围就叫做紧支撑集。总结为一句话就是“除在一个很小的区域外，函数为零，即函数有速降性”。 2、对称性 具有对称性的小波，在图像处理中可以很有效地避免相位畸变，因为该小波对应的滤波器具有线性相位的特点。 3、消失矩 在实际中，对基本小波往往不仅要求满足容许条件，对还要施加所谓的消失矩（Vanishing Moments）条件，使尽量多的小波系数为零或者产生尽量少的非零小波系数，这样有利于数据压缩和消除噪声。消失矩越大，就使更多的小波系数为零。但在一般情况下，消失矩越高，支撑长度也越长。所以在支撑长度和消失矩上，我们必须要折衷处理。
我们都喜欢看美剧，可是要想真正从美剧中提高英语，还要做笔记噢~! 1.Clear the air消除误会 To settle a dispute and restore good relations Example:We had a meeting with the workers, and I think we’ve cleared the air now。 2.Be in the air将要发生的事情 The feeling or idea that something new is about to happen or is going to change。 Example:From the arguments going on at the meeting, it seems that a change in policy is in the air。 3.A bad egg缺乏道德的人 Somebody who has no moral principles and should be avoided Example:You mustn’t lend Tim money, he’s a bad egg. You’ll never see him or your money again! 4.Cost an arm and a leg极其昂贵 To be very expensive Example:I love that fur coat. However, I don’t think I’m going to buy it because it costs an arm and a leg。
美国文学 1.殖民地时期及独立革命战争时期的美国文学 Philip Freneau（菲利普﹒弗瑞诺） (1)He was considered as the “Poet of the American revolution” as the most outstanding poet in America of the 18th century. (2)He was a satirist, a bitter polemicist. (3)He wrote many poems encouraging revolution and encouraging the glory that would be won by overcoming the British. The Wild Honey Suckle 《野金银花》 The Indian Burying Ground 《印第安人的殡葬地》 The British Ship《英国囚船》 The Rising Glory of America 《美洲光辉的兴起》 (1)The Wild Honey Suckle is Freneau’s best lyric (2)It anticipated the 19th—century use of simple nature imagery. The Indian Burying Ground anticipated romantic primitivism and the celebration of the “Noble Savage”. Thomas Jefferson（托马斯﹒杰弗逊） The Declaration of Independence《独立宣言》 (1)The Declaration of Independence was adopted July 4, 1776. (2)It not only announced the birth of a new nation, but also expounded a philosophy of human freedom. (3)It lists 13 cruelties committed by the King of Britain. (4)The famous lines are: “We hold these truths to be self-evident, that they are endowed by their Creator with certain unalienable rights, that among these are Life, Liberty and the pursuit of Happiness.”(5) Thomas Jefferson’s thought was inspired by the thoughts of John Locke. 2.浪漫主义时期的美国文学 Calvinism（加尔文主义） (1)Calvinism refers to the religious teachings of John Calvin and his followers. (2) Calvin taught that only certain persons, the elect, were chosen by God to be saved, and these could be saved only by God’s grace. (3) Calvinis m forms the basis for the doctrines and practices of the Huguenots, Puritans, Presbyterians, and the Reformed churches.
第五讲 几种特殊类型函数的积分 一、回顾上节内容 分部积分法 二、本节教学内容 1.简单有理函数的积分； 2.简单三角函数有函数的积分； 3.简单无理函数的积分。 [教学目的与要求] 1.掌握简单有理函数的积分； 2.掌握简单三角函数有函数的积分； 3.掌握简单无理函数的积分。 [教学重点难点] 简单有理函数、三角函数与无理函数积分 §4.4 几种特殊类型函数的积分 一、有理函数的不定积分 1.化有理函数为简单函数 两个多项式的商所表示的函数)(x R 称为有理函数，即 m m m m m n n n n n b x b x b x b x b a x a x a x a x a x Q x P x R ++++++++++= =------122110122110)()()( （1） 其中n 和m 是非负整数；n a a a a ,,,,210 及m b b b b ,,,,210 都是实数，并且 0,000≠≠b a ． 当（1）式的分子多项式的次数n 小于其分母多项式的次数m ，即m n <时，称为有理真分式；当m n ≥时，称为有理假分式． 对于任一假分式，我们总可以利用多项式的除法，将它化为一个多项式和一个真分式之和的形式．例如 1 2)1(112224+++-=+++x x x x x x ． 多项式的积分容易求得，下面只讨论真分式的积分问题． 设有理函数（1）式中m n <，如果多项式)(x Q 在实数范围内能分解成一次因式和二次质因式的乘积：
μλβα)()()()()(220s rx x q px x b x a x b x Q ++++--= ． 其中s r q p b a ,,,,,,, 为实数；042<-q p ，…，042<-s r ；,,,βα μλ,, 为正整数，那末根据代数理论可知，真分式) () (x Q x P 总可以分解成如下部分分式之和，即 β ααα)()()()() (1121b x B a x A a x A a x A x Q x P -++-++-+-=- λββ)()(21 112q px x N x M b x B b x B ++++ -++-+- μλλλ)()(21121222s rx x S x R q px x N x M q px x N x M ++++ ++++++++++ - s rx x S x R s rx x S x R +++++++++-2 122 2)(μμμ ． （2） 其中i i i i i i S R N M B A ,,,,,,, 都是待定常数，并且这样分解时，这些常数是唯一的． 可见在实数范围内，任何有理真分式都可以分解成下面四类简单分式之和： （1）a x A - ， （2） k a x A )(- （k 是正整数，2≥k ）， （3） q px x B Ax +++2 （042 <-q p ）， （4） k q px x B Ax ) (2 +++ （k 是正整数，04,22<-≥q p k ）． 2. 有理函数的不定积分 求有理函数的不定积分归结为求四类简单分式的积分．下面讨论这四类简单分式的积分． （1）C a x A a x d a x A dx a x A +-=--=-??ln )(1， （2）C a x k A a x d a x A dx a x A k k k +-?--=--=---?? 1) (11)()()(，
American Dream: American dream means the belief that everyone can succeed as long as he/she works hard enough. It usually implies a successful and satisfying life. It usually framed in terms of American capitalism（资本主义）, its associated purported meritocracy,（知识界精华）and the freedoms guaranteed by the U.S. . Transcendentalism 超验主义: Transcendentalism was a group of new ideas in literature, religion, culture and philosophy that emerged in in the early to middle 19th century. Transcendentalists spoke for cultural rejuvenation and against the materialism of American society. It placed emphasis on spirit, or the Over soul, as the most important thing in the world. It stressed the importance of individual and offered a fresh perception nature ad symbolic of the spirit of God. Prominent transcendentalists included Ralph Waldo Emerson and Henry David Thorough. American Naturalism自然主义: American naturalism was a new and harsher realism. The naturalists attempt to achieve extreme objectivity and frankness, presenting characters of low social and economic classes who were determined by environment and heredity. It emphasized that the world was amoral, the men and women had no free will, that lives were controlled by heredity and environment, that the destiny of humanity was misery in life and oblivion in death. The pessimism and deterministic ideas naturalism pervaded the works of such American writers as Stephen Crane and Theodore Dreiser. The Gilded Age镀金时代: the Gilded Age refers to the era of rapid economic and population growth in the during the post- and post- of the late . The term "Gilded Age" was coined by and in their 1873 book, .The Gilded Age is most famous for the creation of a modern industrial economy. The end of the Gilded Age coincided with the , a deep depression. The depression lasted until 1897 and marked a major political realignment in the . After that came the . The Lost Generation: The Lost Generation is a group of expatriate American writers residing primarily in during the 1920s and 1930s. The group was given its name by the American writer Gertrude Stein, who used “a lost generation” to refer to expatriate Americans bitter about their World War I experiences and disillusioned
Our Vanishing Night Most city skies have become virtually empty of stars. If humans were truly at home under the light of the moon and stars, we would go in darkness happily, the midnight world as visible to us as it is to the vast number of nocturnal species on this planet. Instead, we are diurnal creatures, with eyes adapted to living in the sun's light. This is a basic evolutionary fact, even though most of us don't think of ourselves as diurnal beings any more than we think of ourselves as primates or mammals or Earthlings. Yet it's the only way to explain what we've done to the night: We've engineered it to receive us by filling it with light. This kind of engineering is no different than damming a river. Its benefits come with consequences—called light pollution—whose effects scientists are only now beginning to study. Light pollution is largely the result of bad lighting design, which allows artificial light to shine outward and upward into the sky, where it's not wanted, instead of focusing it downward, where it is. Ill-designed lighting washes out the darkness of night and radically alters the light levels—and light rhythms—to which many forms of life, including ourselves, have adapted. Wherever human light spills into the natural world, some aspect of life—migration, reproduction, feeding—is affected. For most of human history, the phrase "light pollution" would have made no sense. Imagine walking toward London on a moonlit night around 1800, when it was Earth's most populous city. Nearly a million people lived there, making do, as they always had, with candles and rushlights and torches and lanterns. Only a few houses were lit by gas, and there would be no public gaslights in the streets or squares for another seven years. From a few miles away, you would have been as likely to smell London as to see its dim collective glow. Now most of humanity lives under intersecting domes of reflected, refracted light, of scattering rays from overlit cities and suburbs, from light-flooded highways and factories. Nearly all of nighttime Europe is a nebula of light, as is most of the United States and all of Japan. In the south Atlantic the glow from a single fishing fleet—squid fishermen luring their prey with metal halide lamps—can be seen from space, burning brighter, in fact, than Buenos Aires or Rio de Janeiro. In most cities the sky looks as though it has been emptied of stars, leaving behind a vacant haze that mirrors our fear of the dark and resembles the urban glow of dystopian