Classification
classification作文
classification作文Classification Essay: The Types of Friends You Need in Your Life。
Friendship is an essential part of our lives. Having friends can bring us joy, comfort, and support. However, not all friends are the same. In fact, there are different types of friends that play different roles in our lives. In this essay, we will explore the different types of friends you need in your life.The Loyal Friend。
The loyal friend is the one who is always there for you, no matter what. They are the ones who will stand by your side through thick and thin, and will never let you down. They are the ones you can count on to have your back when times get tough. The loyal friend is a rare and precious gem, and having one in your life is truly a blessing.The Fun-loving Friend。
The fun-loving friend is the one who always knows how to have a good time. They are the life of the party, and can turn even the most mundane activities into an adventure. They are the ones who can make you laugh when you're feeling down, and can always be counted on to lift your spirits. Having a fun-loving friend in your life can bring joy and excitement to even the dullest of days.The Wise Friend。
CLASSIFICATION
Periodic Table of Elements
1789 Lavosier
1869 Mendelev
Measures of similarity
i) distance ii) angular (correlation)
Var 2
xkT dkl = || xTk-xTl||
Classification
X2
X1
X1 and X2 is correlated, cov(X1, X2) ≠ 0 for both “classes” (high X1 => high X2) KNN fails, but PC analysis provides the correct classification
RSD of object:
2 s = ∑ eki /( M − Aq ) 2 k i =1
smax
PC 1
1/2st 1/2st
tmax tmin tlower tupper
CLASSIFICATION OF A NEW OBJECT
i) Fit object to the class model ii) Compare residual distance of object to the class model with the average residual distance of objects used to obtain the class (F-test)
CORRELATION&SIMILARITY
Var 2
xcT xTk
eTk
Var 1 Variable Space
CORRELATION&SIMILARITY Unsupervised:
classification方法
classification方法标题，探索数据科学中的分类方法。
在数据科学领域，分类方法是一种重要的技术，用于将数据集中的样本划分到不同的类别中。
这种方法在机器学习、数据挖掘和统计分析中被广泛应用，为研究人员和数据科学家提供了一种有效的工具，用于理解和分析数据。
本文将介绍几种常见的分类方法，并探讨它们在不同领域中的应用。
1. 逻辑回归（Logistic Regression）。
逻辑回归是一种常见的分类方法，用于处理二分类问题。
它通过将线性回归模型的输出映射到一个概率范围内来进行分类。
逻辑回归在广告点击预测、信用评分和医学诊断等领域中得到了广泛的应用。
2. 决策树（Decision Trees）。
决策树是一种基于树状结构的分类方法，通过一系列的决策规则来对数据进行分类。
它易于理解和解释，适用于处理大规模数据集。
决策树在金融风险评估、市场营销和医学诊断等领域中具有重要的应用价值。
3. 支持向量机（Support Vector Machines）。
支持向量机是一种强大的分类方法，通过寻找最优超平面来对数据进行分类。
它在处理非线性数据和高维数据方面表现出色，被广泛应用于图像识别、文本分类和生物信息学等领域。
4. 朴素贝叶斯（Naive Bayes）。
朴素贝叶斯是一种基于贝叶斯定理的分类方法，假设特征之间相互独立。
尽管这种假设在现实世界中往往不成立，但朴素贝叶斯在文本分类、垃圾邮件过滤和情感分析等领域中表现出色。
总之，分类方法在数据科学中扮演着重要的角色，为研究人员和数据科学家提供了强大的工具，用于解决各种实际问题。
随着数据科学领域的不断发展，我们相信分类方法将继续发挥重要作用，并为人们带来更多的启发和创新。
7.Classification
4
Choosing a topic
Avoid topics that are colorless, flat, insipid, boring, unimaginative, monotonous and BROAD. They require no thought to write and no thought to read, and they require no effort to forget. Topics with two extremes and a middle position are almost always destined for dullness. Bad idea: intelligent thinkers, unintelligent thinkers, and average thinkers. How about this: academic intelligence (raw IQ), commonsense intelligence (good practical judgment), and street-smart intelligence (cunning)? Be New, Be Original! (free-ranging thinking/free associations) Hairdresser’s customers classified as dogs: some pretty and lovable like the cocker spaniel, some growly and assertive like the doberman, and some feisty and temperamental like the poodle.
Classification: Establishing Groups
Classification_ppt
Bacteria
• 3 basic shapes: spheres, rods and spirals
• Very, very small (10-50 m)
– (1 m = 0.001 mm)
• All have a similar structure
• All have a cell wall (different to plants and fungi) and a cell membrane • May have a capsule or slime layer, for protection from drying out and from other invading bacteria or viruses • No nucleus • DNA is a single, circular chromosome, loose in the cytoplasm • Some can swim with their flagellum • Some have plasmids
Features of different groups of animals
Plants
• Includes flowering plants, mosses and ferns
• Muticelluar • Cells contain chloroplasts • Make their own nutrition (through photosynthesis) • Cells have cell walls made of cellulose (a carbohydrate) • They store energy as starch • They transport energy as sucrose
15 Classification and Division
I. What is Classification and Division?
Division is the process of breaking a whole into parts (from abstract to concrete); Classification is the act of sorting individual items into categories (from concrete to abstract).
• The people in my life are classifiable into three distinct classes, each with its own peculiar way of behaving: lower class, middle class, and snooty. • My friends, relatives, and acquaintances fall neatly into three groups: the werefats, the are-fats, and the will-be-fats.
Example 7 Decide the following principles:
• When you are at the bookstore with only twenty dollars---? • So you decide which books to carry across campus ---? • Finally as you study and read ---?
• My friends (enemies) may be grouped into three major types. • Several steps led to former President Nixon's resignation from the White House during the Watergate scandal.
classification
Hale Waihona Puke orchestra instruments supporting details very similar pattern
four sections
When writing a classification paragraph, you need to establish an adequate basis---the principle on which things are divided into categories. The basis you establish must be consistent with your purposes.
Lesson Three
Classification Paragraphs
Objectives
Writing classification paragraph Establishing an adequate basis Making mutually exclusive categories Making complete classification Making sure the basis is consistent with the purpose of writing Words and expressions
Topics
You have lived and studied with your classmates for some time. According to their personalities, can you classify them into different groups? Education is developing very fast. Apart from formal schools, there are night-school, training centers and schools through the mass media. How do you classify those schools? As people’s life improves, their diet has become more sophisticated. There is the main course for each meal, various drinks, fruit, etc. How do you classify them into categories?
垃圾分类英语海报文字素材
垃圾分类英语海报文字素材1、垃圾各就各位，文明事半功倍。
Garbage is in place, civilization is twice the result with half the effort.2、一点分类，聚成绿洲。
A little classification, gather into oasis.3、混放是垃圾，分类成资源。
Mixed waste is classified as resources.4、给垃圾一个分类的归宿，还我们一个清洁的世界。
Give garbage a sort of home, return us a clean world.5、播下一个行动，你将收获一份美丽。
Sow an action and you will reap a beauty.6、千家万户垃圾分类，文明港城更加洁美。
Thousands of household garbage classification, civilized port city is more clean and beautiful.7、钟爱浙纺院始于心，垃圾细分类践于行。
Love Zhejiang Textile Institute starts from the heart, and garbage subdivision is practiced in practice.8、红橙蓝绿，垃圾也可添美丽。
Red, orange, blue and green, garbage can also add beauty.9、垃圾混置是垃圾，垃圾分类是资源。
Garbage mixing is garbage, garbage classification is resource.10、乱放是垃圾，分类是资源。
Littering is rubbish, classification is resource.11、蔚然成风新风尚，众人一条分类心。
Classification
Rules of classification
Apply our principle of classification consistently Apply our principle of classification thoroughly Make the categories logically distinct from each other and avoid overlapping of categories
Supporting sentences
The supporting sentences in a classifying paragraph are parallel and are presented by listing. Therefore, generally speaking, the classifying paragraph is also a listing paragraph. we make a list of the items and discuss them one by one. We achieve coherence by using listing words.
Classification
Classification is one of the most useful methods for explaining an object or idea. We break a general class down and group the parts into categories whose members share similar characteristics. With this method, we create order out of confusion and provide a clear overview of the information we offer.
美国国会图书馆分类法介绍【英文精品】
Selected classification schemes
• Most common in U.S. libraries:
– Dewey Decimal Classification (DDC) – Library of Congress Classification (LCC) – Superintendent of Documents (SuDocs) – National Library of Medicine (NLM)
Notation:
The system of symbols used to represent the classes in a classification system
General process for classification
• Analyze the subject content of the work. Summarize the primary subject focus of the work as a whole • Go to the classification schedules and determine where the item should be placed within that scheme • Assign the class number • As appropriate for the scheme, add additional elements to the class number
“Public orderings”
Classification of books (2)
• • • • Read and unread books Order of acquisition Provenance Sentimental value