二甲基 - 文化课
type: channel
link: https://www.ariels.xyz/category/course/
items: Why is artificial intelligence important?
items: What is Artificial Intelligence?
items: 导数不等式证明之变换主元和函数同构
items: 高中英语作文速查
items: 一些奇怪的数学题
items: 我一辈子都写不出的句子
items: 高中有机化学常用反应速查
items: A Service of Love 分析
items: 《红楼梦》知识整理
items: DNA分子的结构

Why is artificial intelligence important?
type: item
date: 2022-09-07T09:51:00+00:00
description: The content is provided by Jeri's Class, AI EFE. It is reorganize by Ariel Xiong mailto:ArielHeleneto@outlook.com.TextAI automates repetitive learning and discovery through data. But AI is different from hardware-driven, robotic automation. Instead of automating manual tasks, AI performs frequent, high-volume, computerized tasks reliably and without fatigue. For this type of automation, human inquiry is still essential to set up the system and ask the right questions.AI adds intelligence to existing products. In most cases, AI will not be sold as an individual application. Rather, products you already use will be improved with AI capabilities, much like Siri was added as a feature to a new generation of Apple products. Automation, conversational platforms, bots and smart machines can be combined with large amounts of data to improve many technologies at home and in the workplace, from security intelligence to investment analysis.AI adapts through progressive learning algorithms to let the data do the programming. AI finds structure regularities in data so that the algorithm requires a skill: The algorithm can teach itself how to play chess, it can teach itself what product to recommend next online. And the models adapt when given new data. Back propagation1 is an AI technique that allows the model to adjust, through training and added data, when the first answer is not quite right.AI analyzes more and deeper data using neural networks that have many hidden layers. Building a fraud detection2 system with five hidden was almost impossible a few years ago.All that has changed with incredible computer power and big data. You need lots of data to train deep learning models because they learn directly from the data. The more data you can feed them, the more accurate they become.AI achieves incredible accuracy through deep neural networks--which was previously impossible. For example, your interactions with Alexa, Google Search and Google Photos are all based on deep learn…

What is Artificial Intelligence?
type: item
date: 2022-09-07T09:35:00+00:00
description: What is Artificial Intelligence?The content is provided by Jeri's Class, AI EFE. It is reorganize by Ariel Xiong mailto:ArielHeleneto@outlook.com.TextArtificial Intelligence (AI), sometimes called machine intelligence, is intelligence demonstrated by machines, in contrast to the natural intelligence displayed by humans and other animals. In computer science AI research is defined as the study of “intelligent agent”: any device that perceives its environment and takes actions that maximize its chance of successfully achieving its goals. Colloquially, the term “artificial intelligence” is applied when a machine mimics “cognitive” functions that human associate with other human minds, such as “learning” and “problem solving”.For years, it was thought that computer would never be more powerful than the human brain, but as development has accelerated in modern times, this has proven to be not the case.AI as a concept refers to computing hardware being able to essentially think for itself, and make decisions based on the data it is being fed. AI systems are often hugely complex and powerful, with the ability to process unfathomable depths of information in an extremely quick time in order to come to an effective conclusion.Thanks to detailed algorithms, AI systems are now able to perform mammoth computing tasks much faster and more efficiently than human minds, helping making big strides in research and development areas around the world.Some of the most notable real-world application of AI are IBM’s Watson, which is being used to power research in a huge range of fields, with Microsoft’s Azure Machine Learning and TensorFlow also making headlines around the world.But AI-powered smart assistants are becoming a common presence on mobile devices too, with the likes of Siri, Cortana and Alexa all being welcomed into many people’s lives.There seems to limit to the applications of AI technologies, and perhaps the most exciting aspect of the ecosystem is that there’s no telling…

导数不等式证明之变换主元和函数同构
type: item
date: 2021-09-21T08:53:28+00:00
description: 题目已知 $f(x)=e^{ax-1}+x\ln x$。当 $a=1$ 时，试求 $y=f(x)$ 在 $(1,f(1))$ 的切线方程。试证明 $\forall a \in\mathbb{R},x \in\mathbb{R^*},f(x)\geq ax^2$。

高中英语作文速查
type: item
date: 2021-07-10T15:43:00+00:00
description: 本文整理了高中英语作文常见的模板句型等。[...]

一些奇怪的数学题
type: item
date: 2021-06-12T10:03:00+00:00
description: 导数例一已知函数 $f(x)=x \sin x+2 \cos x+a x^{2}$，记 $f(x)$ 的导函数为 $f'(x)$，并定义$$ \max \left\{a, b\right\}=\begin{cases}a &a\gt b\\b &a\leq b\end{cases} $$当 $a=0$ 时，求证： $f(x)$ 在 $[-\pi,\pi]$ 有且只有两个零点。$\forall x_{1}, x_{2} \in\left[0, \frac{\pi}{2}\right], \quad x_{1} \neq x_{2}, \cfrac{f\left(x_{1}\right)-f\left(x_{2}\right)}{x_{1}-x_{2}}\lt\max \left\{f^{\prime}\left(x_{1}\right), f^{\prime}\left(x_{2}\right)\right\}$，试求 $a$ 的范围。[collapse status="false" title="解析"]第一问考察零点存在性定理及其推论，所以直接代入求导即可。第二问本意为考察拉格朗日中值定理1，但是可以使用定积分的集合意义绕过。[/collapse][collapse status="false" title="第一问参考答案"]当$a=0$时，$f'(x)=x\cos(x)-\sin(x)$，$f''(x)=-x\sin(x)$，$\because x \in [-\pi,\pi]$$\therefore f''(x)\leq 0$$\therefore f'(x)\swarrow$所以$f(x)$的增减性如下表。$x$$(-\infty,0)$$(0,+\infty)$$f'(x)$$+$$-$$f(x)$$\nearrow$$\searrow$$\because f(0)=2 \gt0 ,f(\pi)=f(-\pi)=-2\lt0$$\therefore \exists x_0 \in (-\pi,0),x_1 \in (0,\pi),s.t. f(x_0)=f(x_1)=0\square$[scode type="blue"]QED 是拉丁词组「Quod Erat Demonstrandum」（这就是所要证明的）的缩写，代表证明完毕。现在的 QED 符号通常是$\square$或者$\blacksquare$，也可书写为「Q.E.D」。[/scode][/collapse][collapse status="false" title="第二问参考答案（定积分做法）"]$f(x)=x\sin x+2\cos x+ax^2$$f'(x)=x\cos x-\sin x+2ax$$f''(x)=-x\sin x+2a$不妨设$x_1\gt x_2$。当$f'(x)\searrow$时。$\because f(x_1)-f(x_2)=\int^{x_2}_{x_1}f'(x)\rm{dx}\lt f'(x_2)\cdot (x_1-x_2)$$\therefore \cfrac{f(x_1)-f(x_2)}{x_1-x_2}\lt f'(x_1)$$\because f'(x)\searrow,x_1\gt x_2$$\therefore \max\left\{f'(x_1),f'(x_2)\right\}=f'(x_1)$$\therefore\cfrac{f\left(x_{1}\right)-f\left(x_{2}\right)}{x_{1}-x_{2}}\lt\max \left\{f^{\prime}\left(x_{1}\right), f^{\prime}\left(x_{2}\right)\right\}\square$此时，$f''(x)=-x\sin x+2a\lt0\Rightarrow a\in(-\infty,0]$。当$f'(x)$先增后减时。令$f'(x_1)=f'(x_2)$。此时$f(x_1)-f(x_2)=\int^{x_2}_{x_1}f'(x)\rm{dx}\geq f'(x_2)\cdot (x_1-x_2)$，与题设矛盾，故舍去。当$f'(x)\nearrow$时。$\because f(x_1)-f(x_2)=\int^{x_2}_{x_1}f'(x)\rm{dx}\lt f'(x_1)\cdot (x_1-x_2)$$\therefore \cfrac{f(x_1)-f(x_2)}{x_1-x_2}\lt f'(x_1)$$\because f'(x)\nearrow,x_1\gt x_2$$\therefore \max\left\{f'(x_1),f'(x_2)\right\…

我一辈子都写不出的句子
type: item
date: 2021-05-09T08:45:47+00:00
description: 前言这些句子反正我是写不出来，那就背点。[...]

高中有机化学常用反应速查
type: item
date: 2021-02-22T09:46:00+00:00
description: 文档的正确打开方式搜索正常的电脑浏览器都支持使用 Ctrl+F 搜索全文。然后找到你需要的方程式，右键-Show Math As-Tex Commands即可获得该方程的源代码。下载全文源代码本文最底部折叠框内有全文源代码，点击即可复制。烷甲烷燃烧$$ \ce{CH4(g) + 2O2(g) ->T[点燃]CO2(g) + 2H2O} $$甲烷和氯气发生取代反应$$ \ce{CH4 + Cl2 ->T[光照] CH3Cl + HCl}\\\\ \ce{CH3Cl + Cl2 ->T[光照] CH2Cl2 + HCl}\\\\ \ce{CH2Cl2 + Cl2 ->T[光照] CHCl3 + HCl}\\\\ \ce{CHCl3 + Cl2 ->T[光照] CCl4 + HCl} $$甲烷受热分解$$ \ce{CH4 ->T[高温] C + 2H2} $$烷烃燃烧的通式$$ \ce{C_nH_{2n + 2} + \frac{3n + 1}{2}O_2 ->T[点燃] nCO_2 + (n + 1)H_2O} $$烷烃取代反应的通式$$ \ce{C_nH_{2n + 2} + X_2 ->T[光照] C_nH_{2n + 1}X + HX} $$烷烃高温裂解的例子$$ \ce{C16H34 ->T[催化剂][加热加压] C8H16 + C8H18} \text{；}\ce{C7H16 ->T[催化剂][加热加压] C4H10 + C3H6} $$烯乙烯的燃烧$$ \ce{C2H4 + 3O2 ->T[点燃] 2CO2 + 2H2O} $$乙烯通入溴水或溴的四氯化碳溶液$$ \ce{CH2=CH2 + Br2 -> CH2Br-CH2Br} $$乙烯与氢气加成$$ \ce{CH2=CH2 + H2 ->T[催化剂][\Delta] CH3CH3} $$乙烯与氯化氢加成$$ \ce{CH2=CH2 + HCl ->T[催化剂][\Delta] CH3CH2Cl} $$乙烯与水加成$$ \ce{CH2=CH2 + H2O ->T[催化剂][加热加压] CH3CH2OH} $$乙烯与氰化氢加成$$ \ce{CH2=CH2 + HCN ->T[催化剂][\Delta] CH3CH2CN} $$乙烯发生加聚反应形成聚乙烯$$ \ce{nCH2=CH2 ->T[催化剂] \text{\sout{ [ }} CH2-CH2 \text{\sout{ ] }}_n} $$烯烃的加成反应通式$$ \ce{C_nH_{2n} + X2 -> C_nH_{2n}X2}\\\\ \ce{C_nH_{2n} + H2 ->T[Ni][\Delta] C_nH_{2n + 2}}\\\\ \ce{C_nH_{2n} + HX ->T[催化剂][\Delta] C_nH_{2n + 1}X} $$烯烃的燃烧通式$$ \ce{C_nH_{2n} + \frac{3n}{2}O2 ->T[点燃] nCO2 + nH2O} $$烯烃氧化反应$$ \ce{CH2=CH2 ->T[酸性高锰酸钾溶液] CO2 + H2O} $$炔乙炔的燃烧$$ \ce{2C2H2 + 5O2 ->T[点燃] 4CO2 + 2H2O} $$乙炔与溴的四氯化碳溶液发生加成反应$$ \ce{CH#CH + 2Br2 -> CHBr2CHBr2} $$乙炔和氯化氢发生加成反应$$ \ce{CH#CH + HCl ->T[催化剂][\Delta] CH2=CHCl} $$醇乙醇和钠发生取代反应$$ \ce{2CH3CH2OH + 2Na -> 2CH3CH2ONa + H2 ^} $$乙醇和溴化氢发生反应$$ \ce{CH3CH2-OH + HBr ->T[\Delta] CH3CH2Br + H2O} $$乙醇的分子内脱水反应（消去反应）$$ \ce{CH3CH2OH ->T[浓硫酸][170^{\circ}C] CH2=CH2 ^ + H2O} $$乙醇的分子间脱水反应$$ \ce{CH3CH2O-H + HO-CH2CH3 ->T[浓硫酸][140°C] CH3CH2-O-CH2CH3 + H2O} $$乙醇燃烧氧化$$ \ce{CH3CH2OH + 3O2 ->T[点燃] 2CO2 + 3H2O} $$乙醇催化氧化$$ \ce{2CH3CH2OH + O2 ->T[Cu/Ag][\Delta] 2CH3CHO + 2H2O} $$乙醇和乙酸发生取代反应生成乙酸乙酯$$ \ce{CH3COOH + HOC2H5 <=>T[浓硫酸][\Delta] CH3COOC2H5 + H2O} $$卤代烃溴乙烷在氢氧化钠的水溶液中发生水解反应$$ \ce{C2H5-Br + NaOH ->T[水][\D…

A Service of Love 分析
type: item
date: 2020-10-29T15:27:00+00:00
description: 原文When one loves one's Art no service seems too hard.That is our premise. This story shall draw a conclusion from it, and show at the same time that the premise is incorrect. That will be a new thing in logic, and a feat in story-telling somewhat older than the great wall of China.Joe Larrabee came out of the post-oak flats of the Middle West pulsing with a genius for pictorial art. At six he drew a picture of the town pump with a prominent citizen passing it hastily. This effort was framed and hung in the drug store window by the side of the ear of corn with an uneven number of rows. At twenty he left for New York with a flowing necktie and a capital tied up somewhat closer.Delia Caruthers did things in six octaves so promisingly in a pine- tree village in the South that her relatives chipped in enough in her chip hat for her to go "North" and "finish." They could not see her f--, but that is our story.Joe and Delia met in an atelier where a number of art and music students had gathered to discuss chiaroscuro, Wagner, music, Rembrandt's works, pictures, Waldteufel, wall paper, Chopin and Oolong.Joe and Delia became enamoured one of the other, or each of the other, as you please, and in a short time were married--for (see above), when one loves one's Art no service seems too hard.Mr. and Mrs. Larrabee began housekeeping in a flat. It was a lonesome flat--something like the A sharp way down at the left-hand end of the keyboard. And they were happy; for they had their Art, and they had each other. And my advice to the rich young man would be--sell all thou hast, and give it to the poor--janitor for the privilege of living in a flat with your Art and your Delia.Flat-dwellers shall indorse my dictum that theirs is the only true happiness. If a home is happy it cannot fit too close--let the dresser collapse and become a billiard table; let the mantel turn to a rowing machine, the escritoire to a spare bedchamber, the washstand to an upright piano; let the four walls come…

《红楼梦》知识整理
type: item
date: 2020-09-11T13:48:00+00:00
description: 名著阅读-《红楼梦》一、《红楼梦》常考知识点汇总**二、主要人物鉴赏**三、创作背景及作者简介**四、人物关系**一、《红楼梦》常考知识点汇总： 1、金陵十二钗指的是：(林黛玉、薛宝钗、王熙凤、贾元春、贾迎春、贾探春、贾惜春、贾巧姐、李纨、史湘云、秦可卿、妙玉)。 2、《红楼梦》中，有“小宝钗”、“小黛玉”之称的两个人分别是(袭人)、(晴雯)。 3、《红楼梦》的两条主线是(贾府由盛到衰的演变过程)、(宝、黛、钗的爱情婚姻悲剧) 4、《红楼梦》中，“品格端方，容貌丰美，行为豁达，随时从分。”说的是(薛宝钗) 5、《红楼梦》中，“眉如墨画，面如桃瓣，目如秋波。虽怒时而若笑，即嗔时而有情”。说的是(贾宝玉)。 6、《红楼梦》中，“情天情海幻情身，情既相缝必主**。漫言不有皆荣出，造衅开端实在宁。”说的是(秦可卿)。 7、贾府的媳妇，稳重贤惠，本分随和，青春丧偶，统领众姐妹，曾负责海棠诗，此人便是(李纨)。 8、“未若锦囊收艳骨，一抔净土掩风流”的作者是《红楼梦》中的(林黛玉)，此诗的名字是《葬花词》，此诗意在喻人，悲叹自己的命运，控诉社会的黑暗，其思想性与艺术性均达到最高境界。 9、《红楼梦》的作者是(清)代作家(曹雪芹)，相传后40回是(高鄂)所作。 10、《红楼梦》中有两句诗评论王熙凤在贾府衰亡中的悲惨下场，这两句诗是(机关算尽太聪明,反误了卿卿性命)。 11、《红楼梦》又名《石头记》、《情僧录》、《风月宝鉴》、《金陵十二钗》等。 12、《红楼梦》中，“枉自温柔和顺，空云似贵如兰。堪羡优伶有福，谁知公子无缘”，说的是(袭人)。 13、“四春”之中，性格比较懦弱的是(迎春)，精明志高、具有管理才能的是(探春)，最后出家为尼的是(惜春)。 14、《红楼梦》中结的两个诗社分别是(海棠社)和(桃花社)，社长是(李纨和林黛玉)。 15、《红楼梦》中，“绛珠仙草”指的人物是(林黛玉)，“神瑛侍者”是(贾宝玉)。 16、《红楼梦》中，“才自精明志自高，生于未世运偏消。清明涕泪江边望，千里东风一梦遥。”说的是(贾探春)。 17、《红楼梦》中，“富贵又何为，襁褓之间父母违。转眼吊斜辉，湘江水逝楚云飞。”说的是(史湘云)。 18、潇湘妃子指的是(林黛玉)，蘅芜君指的是(薛宝钗)。 19、《红楼梦》中被人称为“病西施”的是(林黛玉)。 20、《红楼梦》中有诗“纵然生得好皮囊，腹内原来草莽”，“潦倒不通世务，愚顽怕读文章”指的是(贾宝玉)。 21、“玉带林中挂，金簪雪里埋”分别指(林黛玉)、(薛宝钗)。 22、《红楼梦》中，因吃酒醉卧怡红院的人是(史湘云)，最泼辣狠毒的女子是(王熙凤)，最具有管理才能、大胆改革的女子是(贾探春)。 23、《红楼梦》中的“阆苑仙葩”指的是(贾宝玉)“美玉无瑕”指的是(林黛玉)。 24、《红楼梦》中有两位小姐当上了王妃，此二人是(元春)，(探春)。 25、《红楼梦》中“心比天高命比纸薄”的代表人物是(晴雯)。 26、“开谈不说《红楼梦》，读尽诗书也枉然。”一曲红楼多少梦?情天情海幻情身。作品塑造了三个悲剧人物：林黛玉，为爱情熬尽最后一滴眼泪，含恨而死;贾宝玉，终于离弃“温柔富贵之乡”而遁入空门;薛宝钗，虽成了荣府的“二奶奶”却没有赢得真正的爱情，陪伴她的是终生凄凉孤苦。 27、《红楼梦》中，有一个女子，她模样标致，语言爽利，心机极深细，但“机关算尽太聪明，反误了卿卿性命”，这个人是王熙凤;还有一个女子，她寄人篱下，渴望真挚的爱情，但在森严冷漠的封建大家族中，只能凄婉的唱出“一年三百六十日，风刀霜剑严相逼”，这个就是林黛玉。 28、最具叛逆性格的丫鬟是晴雯。最卑躬屈膝的丫鬟是袭人。书中还刻画了一个善良风趣的农村老妇人，她就是刘姥姥。 29、贾府的“四春”分别是：孤独的元春、懦弱的迎春、精明的探春、孤僻的惜春，取“_原应叹息_”之意。 30、《红楼梦》中最热闹的情节是元妃省亲，最有趣的情节是刘姥姥进大观园。二、人物鉴赏： 主要人物性格特点： 1.贾宝玉：率性、多情、温和、善良、富有同情心，单纯，没有功利心。 2.林黛玉：敏感、细心、淡泊、真实、易伤感，绝顶聪明，悟性极强。多愁善感、冷傲孤僻、才学横溢（宝黛同样具有叛逆精神，这也是他们爱情的基础） 3.薛宝钗：外表冷漠，内心炽热。雄心勃勃.封建制度的忠实维护者，表现出温柔大度的女主人风范，工于心计，善于交际 4.王熙凤:尖酸刻薄、两面三刀、心狠手辣 5.李纨：贤良温顺太本分 6.史湘云：她心直口快，开朗豪爽，爱淘气，又不大瞻前顾后 7.晴雯：性格刚烈,疾恶如仇.她向往平等、公正，美丽能干，反抗婚姻，永远反抗她低人一等的命运。她虽是婢女，却绝不低声下气，没有自我。晴雯地位卑微、刁钻、刻薄，同时她也高傲、纯净，目下无尘。正是由于晴雯的泼辣、倔强和对人的刻薄、喜怒无常，才使她的纯洁、天…

DNA分子的结构
type: item
date: 2020-05-23T07:14:26+00:00
description: DNA的化学组成DNA中文全称：脱氧核糖核酸。组成元素：$\ce{C,H,O,N,P}$基本单位：脱氧核糖核苷酸含氮碱基种类A：腺嘌呤G：鸟嘌呤C：胞嘧啶T：胸腺嘧啶DNA模型建构资料沃森与克里克推算出DNA分子呈螺旋结构尝试多种不同的碱基位于螺旋外部的双螺旋和三螺旋结构模型重新构建一个将磷酸核糖骨架安排在螺旋外部，碱基安排在螺旋内部的双链螺旋，其中A与A，T与T配对奥地利著名生物化学家查哥夫研究得出：腺嘌呤的量总是等于胸腺嘧啶的量，鸟嘌呤的量总是等于胞嘧啶的量。发现1953年美国科学家沃森和英国科学家**克里克提出DNA分子的双螺旋结构模型。被誉为20世纪最伟大的发现。DNA分子的结构特点DNA分子是由两条_______的脱氧核苷酸长链盘旋成__________。