Wavelet packet feature selection for lung sounds based on optimization

In this paper, a wavelet packet feature selection method for lung sounds based on optimization is proposed to obtain the best feature set which maximizes the differences between normal lung sounds and abnormal lung sounds (sounds with wheezes or rales). The proposed method includes two main steps: Firstly, the wavelet packet transform (WPT) is used to extract the original features of lung sounds; then the genetic algorithm (GA) is used to select the best feature set. The obtained optimal feature set is sent to four different classifiers to evaluate the performance of the proposed method. Experimental results show that the feature set obtained by the proposed method provides a higher classification accuracy of 94.6% in comparison with the best wavelet packet basis approach and multi-scale principal component analysis (PCA) approach. Meanwhile, the proposed method has effective generalization performance and can obtain the best feature set without priori knowledge of lung sounds.     

定语从句专练

Choose the best answer to each blank: 1 .Finally,the thief handed evething_he had stolen to the poliee.     

阅读天地

If you wish to be the best man,you must suffer the bitterest of the bitter. 吃得苦中苦,方为人上人。Self-trust is the first secret of succeess. 自信心是成功的首要关键。What is the best way to memorize the words? 记单词的最好办法是什么?     

The Power of Love——Romeo and Juliet

Romeo and Juliet is one of the best known and best loved of Shakespeare's plays. The play sings the praises of unswervingly loyal——Shakespeare loves this metrical——expensive song. It conforms rather to the simplest,most basic definition of the termtragedy. Called it a tragedy,it's according to the love of Romeo and Juliet and the death of them. But maybe we want to know more about their love than the tragedy.     

How to Develop the Students’ Interest in English Teaching

It is the key for teachers how to develop the students’ interest because interest is the best teacher.This paper discusses how to develop the students’ interest.     

Fundamentals Of Artistic Aesthetic Perseption

Teacher is the best one to teach a child to understand beauty;general points of the program;lectures of the course;specifics of the practical classes of the course;extracurriculum activities.     

短文改错五题(英文)

The college had va very good football team,and it’s best player was the student who always made trouble in school Then one day the dean(校长)of the college said that the player would have to leave because he cheated at an exam The football coach(教练)immediately went to a dean to try to persuade him not to let the student stay in school.Th dean showed him two answer paper. "This one is Susan's pape She is the best student in the class,"he said. "And this one' s your football player' s. They…     

劝说六原则

What＇ s the best way to persuade someone to do something？ What＇ s the best way of changing someone＇s behaviour？ That＇ s something that politicians would love to know. In Britain, Labour politicians are taking lessons from an expert, Bob Cialdini. They＇re also learning about Cialdini＇ s six principles of persuasion.     

A Case Study of the Teaching Methods of Tourism English

This paper explores the teaching methods of Tourism English in Tianhua College.The teacher adopts both behaviorist and constructivist teaching methods in the experimental teaching for continuous three weeks.After the teaching experiment,questionnaires and interviews were done to find the result of the teaching effect.Both teaching methods are not perfect.The paper concludes that each method has its advantages.The most favored implementation should be a combination of both.We need to make the best of their advantages and avoid their weaknesses in order to achieve the best teaching effect.     

爱,永远经不起等待

Don't wait for a smile,to be nice.Don't wait to be loved,to love.Don't wait to be lonely,to recognize the value of a friend.Don't wait for the best job,to begin to work.     

以谱分解方法对随机摄动系统进行最优性能分析

We investigate the best performance for linear feedback control systems in the case that plant uncertainty is to be considered. First, we define an average integral square criterion of tracking error over a class of stochastic model errors. By utilizing spectral factorization to minimize the performance index, we derive an optimal controller design method and further study best performance in the presence of stochastic perturbation. The results can be used to evaluate optimal performance in practical control system designs.     

鲁宾逊漂流记(Ⅹ)

Then the captain called to the boatand told the men to present for me.There were good things to eat anddrink-meat,sugar,flour,lime-juice,andwine.But I liked the new clothes best.Ihad not had any real coothes for many     

完形填空实战练习

A Directions:For each blank in the following passage there are four words or phrases marked A,B,C,and D.Fill in each blank with the word or phrase that best fits the context. I spent two months with an American family last year when I studied in America. It is said,"The best house is in America,the best wife is in Japan, and the best food is in China." So I was proud to(?)the best food" for my American family.Each day,though my cooking skill was poor,I would     

在黑暗中前行

Traveling through the dark I found a deerdead on the edge of the Wilson River road.It is usually best to roll them into the canyon:that road is narrow; to swerve might make more dead.     

完形填空精练(英文)

LETTING GO OF SUCCESS I want to make the most of every day.And,like most people,I’ve 1 that the best way to do it is to let go of past     

冒险精神的培养

We all want the best for our children. We want them to walk through life unafraid, confidently marching to their own beat. We also want them to make a positive difference in the world.     

英国的酒吧文化和礼仪

Vistors to Britain may find the best place to sample local culture is in a traditional pub.But these friendly hostelries can be mine fields of potential gaffes for the uninitiated.     

Funny Questions

1.Who is close to you,your mom or your dad? 2.Why is the comet(彗星)like Mickey Mouse? 3.Why do people go to bed? 4.What’s the best thing to take when you're run-down? 5.What stays hot even if put it in a refrigerator? 6.What is the best year for a kangaroo(袋鼠)? 7.What surprising things happen everywhere every day?     

ECLECTICIZM：A BEST APPROACH TO TEACHING FOREIGN LANGUAGES IN CHINA

After analysing the advantages and disadvantages of the six main teaching methods.the author maintains that eclecticizm is the best approach to teaching foreign languages in China．     

The Best Thing in Life

What is the best thing in life? In my view, the best thing consists1 of happiness, health, love and friendship. These are things important to one. 　Happiness is the good feeling one has to life and to work and study. If one is happy, that is the most desirable2 thing in the world. 　Health is equally3 important to us. One who is ill all the time can not be happy. With a healthy body, one can do things he likes. 　Love and friendship are the feelings one has towards parents, teachers and friends. One can not be happy unless one loves and is loved by people.