A Country on Wheels

Cars are an important part of life in the United States. Most people feel that they are poor without cars. Though he is poor, he doesn't feel really poor when he has a car. Henry Ford was the man who first started making cars. Maybe, he didn't know how much the car was going to affect(影响) the United States. The cars made the United States a country on wheels(轮子). And they have helped to make the United States rich and modern.     

Toward a Realization of Teaching Principles in Oral English Class:Helping Student Set up Confidence in Speaking English

Speaking is a productive skill which is completely living in the en-couragement of communicative efficiency.Comparatively Chinesestudents are quiet and shy.One of the reasons is that they don't haveadvantage in speaking.They are afraid of making mistakes.Secondly     

Research and development of fringe projection-based methods in 3D shape reconstruction

INTRODUCTION Geometric modelling is essential processing in computer-aided engineering (CAE) systems. Usually, the modelling of three-dimensional (3D) objects is embedded in a computer-aided design (CAD) system, which may take a huge amount of time to build entire models for CAE application. One option is the use of techniques of reverse engineering (RE) to build models from existing objects. Coordinate measuring machines (CMMs) are traditional RE tools used in the manufacturing i…     

新目标英语七年级(下) Units 6—7单元中考考点链接

other,the other,others,the others与another1.I don’t like this shirt,so I want tosee some.(2003年,宁夏中考)A.other B.the otherC.others D.another2.Mr White has three children.Oneis in London,and are in anothercity.(2002年,北京宣武区中考)A.the other B.otherC.the others D.others3.If you want to book a round-tripticket,you’ll have to pay＄30.(2003年,安徽省中考)A.more B.otherC.the other D.another4.Two foreigners are in the readingroom.One is Jack and is Peter.(2005年湖南省中考)A.other B.an…     

人们为何要庆祝新年？

One of the oldest customs of mankind is the celebration of the new year. Some people say the Chinese were the first to start it, others believe it was the ancient Germans, and still others claim it was the Romans. We know that the Chinese have always had a great festival at the time of their new year that comes later than ours. The Chinese New Year festival lasts several days.The ancient Germans established a new year festival be-     

阅读理解一则

One of the qualities that most people admire in others is the willingness to admit one's mistakes. It is extremely hard sometimes, to say a simple thing like “I was wrong about that”, and it is even harder to say, “I was wrong, and you are right about that. ”     

A non-canonical example to support P is not equal to NP

The more unambiguous statement of the P versus NP problem and the judgement of its hardness, are the key ways to find the full proof of the P versus NP problem. There are two sub-problems in the P versus NP problem. The first is the classifications of different mathematical problems (languages), and the second is the distinction between a non-deterministic Turing machine (NTM) and a deterministic Turing machine (DTM). The process of an NTM can be a power set of the corresponding DTM, which proves that the states of an NTM can be a power set of the corresponding DTM. If combining this viewpoint with Cantor’s theorem, it is shown that an NTM is not equipotent to a DTM. This means that "generating the power set P(A) of a set A" is a non-canonical example to support that P is not equal to NP.     

Catalytic effects of V_2O_5 on oxidative pyrolysis of spent cation exchange resin

Pyrolysis is a cost-effective and safe method for the disposal of radioactive spent resins. In this work, the catalytic effects of V_2O_5 on the pyrolysis of cation exchange resin are investigated for the first time. The results show that it is a better catalyst than others so far studied and achieves a lowering of final pyrolysis temperature and residual rate simultaneously when aided by physical blending. The maximum reductions of the final pyrolysis temperature and the residual rate are 173 ℃ and 11.9%(in weight), respectively. Under the action of V_2O_5, low-temperature(445℃) removal of partial sulfonic acid groups occurs and the pyrolysis of the resin copolymer matrix is promoted. This is demonstrated by the analysis of pyrolysis residues at different temperatures by X-ray photoelectron spectroscopy(XPS) and element analysis. The catalytic activity of V_2O_5 is determined by effects both at acid sites and oxidation-reduction centers via H_2-TPR(temperature programmed reduction), O_2-TPD(temperature programmed desorption), CO_2-TPD, and NH_3-TPD. The catalytic effect of oxidation-reduction centers in V_2O_5 is achieved by close contact with the sulfur bond through chemisorption under the effect of acid sites. V_2O_5 is also believed to be the reason for the removal of partial sulfonic acid groups at lower temperatures(445℃). V_2O_5 is an effective catalyst for spent resin pyrolysis and can be further applied in industry.     

A Comparative Study of Metonymy and Synecdoche

Among the modern rhetorical devices,metonymy and synecdoche are two important figures of speech,which are analogous to each other for both use the name of one thing for that of something else.That is to say,both of the rhetorical devices involve substitution.Thus the two concepts are confusing.Metonymy emphasizes on using the name of one thing for that of something else with which it is associated.Synecdoche is a figure of speech in which a part is used for a whole,an individual for a class,a material for a thing,or the reverse of any of these.By making a comparative study of these two through the connotation and category,the author summarizes that:they are two independent figures of speech.     

Testing agile requirements models

INTRODUCTION One main purpose of requirements is to de-scribe the functionality of software. Thus re-quirements often serve as a basis for contracts aswell as for communication between customers anddevelopers. However, they are usually captured innatural language accompanied by a few top-levelinformal drawings like use cases or activity dia-grams that denote the structure of the functional-ities in an abstract way. One disadvantage of naturallanguage is that the developer has to cope with…