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1.
Skinny Dog     
I’ve been saving money for a new guitar.It took me over a year,but now I have enough to buy the one I want.Nothside Music has a Pindari Super Twanger on sale this week and I'm going to buy one tomorrow.I can hardly wait! I think the guitar is really going to help the sound of our band.We call the band Skinny Dog because of the skinny dog that lives near our practice hall.Our band sounds very good now.Mr Walton,the music teacher,heard us practicing today at school,and he came in to listen for a while.He seemed to enjoy it.When we finished,he said we should try to have a gig at a party or something.  相似文献   

2.
The development of compaction bands in saturated soils, which is coupling-rate, inertial and pore-pressure-dependent, under axisymmetric loading was discussed, using a simple model and a matching technique at the moving boundary of a band. It is shown that the development of compaction bands is dominated by the coupling-rate and pore-pressure effects of material. The soil strength makes the band shrinking, whilst pore pressure diffusion makes the band expand. Numerical simulations were carried out in this paper.  相似文献   

3.
Reading Salon     
A Everyone knows Egypt is famous for its pyramids.But do you know that Cairo is a cat city ? One summer I visited Cairo.It was really hot.I saw cats almost everywhere.Pyramids have cats.Offices and hospitals have cats.Cats are also in the hotels and restaurants.Cats appear in the cinema too.To my surprise,even an airplane has one.There are some singing cats in concert halls.They are famous throughout the city.Once an actor was holding his pet,a dying cat,in his arms on the stage.Another cat walked around the dying cat.The cat listened to the music and looked at the dying cat,crying sadly.At first people laughed at him.A few minutes later people began to cry.  相似文献   

4.
The band structures of flexural waves in a phononic crystal thin plate with straight, bending or branching linear defects are theoretically investigated using the supercell technique based on the improved plane wave expansion method. We show the existence of an absolute band gap of the perfect phononic crystal and linear defect modes inside the gap caused by localization of flexural waves at or near the defects. The displacement distributions show that flexural waves can transmit well along the straight linear defect created by removing one row of cylinders from the perfect phononic crystals for almost all the frequencies falling in the band gap, which indicates that this structure can act as a high efficiency waveguide. However, for bending or branching linear defects, there exist both guided and localized modes, and therefore the phononic crystals could be served as waveguides or filters.  相似文献   

5.
Telephone conversation, one of the most common uses of human communication, has been a hot topic in linguistic field in modern times. This essay aims at reviewing the main theories and findings in tele...  相似文献   

6.
INTRODUCTION Research interest in immune system has in-creased over the past few years, and because of its special information processing capabilities, it has been applied to solve many problems (de Castro and Von Zuben, 1999; Hunt and Cooke, 1996). Among these research areas, network security is one of the hot spots and has been considered as analogous to im-munity in natural systems. Researchers at the Uni-versity of New Mexico did a lot of research in this area (Forrest et al., 199…  相似文献   

7.
INTRODUCTION Great advance has been achieved in vegetation characterization with remote sensing techniques. Most spectral vegetation indices (VIs) are usually calculated as the combinations of red and near-in- frared (NIR) reflectance because the information contained in a single spectral band is insufficient for characterizing vegetation status as vegetation exhibits unique reflectance properties in these bands. These VIs can be generally grouped into ratio indices and orthogonal indic…  相似文献   

8.
A dual structure of composite right/left handed (CRLH) transmission line (TL) is analyzed in which an inductance LR is in parallel with a capacitance CL and a shunt capacitance CR is in series with an inductance LL. Both the distributed and lumped cases are considered. The dispersion diagram and transmission properties of the dual CRLH TL are given and compared with those of a standard CRLH TL. Contrary to the frequency response of a standard CRLH TL, a dual CRLH TL has a left-handed (negative phase shift) band at higher frequencies and a right-handed (positive phase shift) band at lower frequencies. A novel dual-band balun is presented as an application.  相似文献   

9.
Delta function is an important function in mathematics and physics. In this paper, the Laplace transforms of δ(t)and δ(t-τ)have been discussed in detail. After the Laplace transform of δ(t)is analyzed, the author has found that three aspects should be taken into account, i.e. τ→0+, τ→0- andτ=0; and it is the same with the Laplace transform of δ(t-τ). Then the results of the Laplace transform of Delta function have been obtained in a rigorous and comprehensive sense.  相似文献   

10.
音乐(英文)     
《英语沙龙》2014,(2):46-46
正Shared Passion One day two teenagers,who hadn’t seen each other since primary school,met at a railway station on the way to college.One was carrying some blues records under his arm,and they began talking about the music and so began a lifelong friendship.In a club they got talking to a guitarist,who asked them if they wanted to join a band he was forming.They found a place to practice and recruited a drummer and a bass player.The group,which was named after a song title,played their first gig and were soon attracting a loyal following.Their first album contained mostly covers,but soon they were writing their own material.Within two years they had their first number one hit;within five they were millionaires.Popular Pastime This could be the story of any number of bands in the last five decades,although it happens to be the Rolling Stones.Whether it is playing in a group,joining a choir or being part of an orchestra,music-making in Britain has always been a very social activity.And  相似文献   

11.
Ⅰ. Read the following passages and answer questions. (把代表正确答案的字母写在题干后的О内)(35points) A. Cats The cat has probably been associated with Man since it was first given a place by his fire in return for keeping the cave dwelling free of rats and mice. The relationship between the cat and Man has not been constant,however. Man‘s attitude has ranged through indifference and neglect to the extremes of persecution and worship.  相似文献   

12.
1IntroductionSerpentine used as inorganic material inindustry hasbeeninvestigated for many years[1-3].But there are noreports on serpentine cat’s eye owing to its rarity.During our recent field investigation in Sichuan Prov-ince,southwest of China,for the first ti me we discov-ered the rare serpentine cat’s eye with well-growntex-ture and,if properly polished,a vivid cat eye effect(see Fig.1).Weng,et al.[4]also reported the newdiscovery of nephrite cat’s eyes inthis region.Serpen-tine can…  相似文献   

13.
This paper describes the experience and the observation of the author as a cataloger of Chinese publications at The Hong Kong Polytechnic University, Library. The trends in collection development of Chinese language materials in the Library have a crucial impact on Chinese cataloging. The way that Chinese cataloging has been haudled in this rapidly changing environment is reported here.  相似文献   

14.
The microwave frequency band is generally con-sidered in the range of 0.3—3 000 GHz. Its impor-tance is recognizable in the current growth of micro-wave communications systems which make use of thesuperior information density. Many kinds of dielectricmaterials have been developed for microwave applica-tions[1,2]. Among them, solid solution ZrO2-SnO2-TiO2(ZST) has a higher dielectric constant, a highquality factor (Q) value and a lowtemperature coeffi-cient of resonant frequency (TCF). B…  相似文献   

15.
<正>William Somerset Maugham was a prominent English novelist and dramatist in the 20th century. He was a prolific writer. In the fifty years of his literary career, he wrote more than ten long novels, some dozens of plays and nearly one hundred short stories. He also wrote a lot of comments, informal essays, travel notes and reminiscences. Up to the present time his major works have been reprinted in many editions, and he has now become one of the favourite writers of modern readers.  相似文献   

16.
Second Language Acquisition is the field of study that investigates the processes by which second languages are learned.People have been interested in SLA since antiquity,and nowadays much of the research emphasis was placed on language learning.It is a truth that second language learners vary enormously in what they actually succeed in learning,which has become one of the major conundrums in the SLA field.Since second language learners begin acquiring the language at a later age than do first language learners,age has been often considered a major factor that determines success in learning a second language.  相似文献   

17.
We report that the ultraviolet (UV) light induced photochromic behavior of layered organic-inorganic perovskite material of (C4H9NH3)2CuCl4, changed from yellow to brown after irradiation with UV light (10 mW/cm^2) and partially recovered through storage in the dark. (C4H9NH3)2CuCl4 exhibited two distinct absorption bands centered at 286 nm (band Ⅰ) and 384 nm (band Ⅱ), which were attributed to the photo-induced exciton formed in 2D inorganic layers sandwiched by organic layers. The blue shift of band Ⅰ from 287 to 269 nm as well as the decrease of the intensity of band Ⅰ and band Ⅱ could be found when samples were irradiated under UV light for different length of time. The simultaneous weakening of the intensity of the N-H...Cl hydrogen bond as well as the vibration of the long Cu-Cl bond in the distorted CuCl6^4- octahedron could be detected from the Fourier transform infrared (FTIR) spectra, which resulted the change of charge distribution of the dissymmetric Cl-Cu...Cl bond and the resulting photochromic behavior.  相似文献   

18.
张兰兰 《海外英语》2012,(22):218-219
As a "Poet Laureate",Alfred Lord Tennyson has been loved and respected by critics and readers.He is famous not only for his unsurpassed virtuosity,but also the melancholy feeling in his poetry.He excels at penning short lyrics,among which "Break,Break,Break" is one of the representatives.This paper analyzes the melancholy in the poem from different perspectives,the rhetorical device of repetend,the diction and the sound.  相似文献   

19.
Aimed at attaining to an integrated and effective pattern to guide the port design process, this paper pats forward a new conception of feature solution, which is based on the parameterized feature modeling. With this solution, the overall port pre-design process can be conducted in a virtual pattern. Moreover, to evaluate the advantages of the new design pattern, an application of port system has been involved in this paper; and in the process of application a computational fluid dynamic analysis is concerned. An ideal effect of cleanness, high efficiency and high precision has been achieved.  相似文献   

20.
We report that the ultraviolet(UV)light induced photochromic behavior of layered organic-inorganic perovskite material of(C4H9NH3)2CuCl4,changed from yellow to brown after irradiation with UV light(10 mW/cm2)and partially recovered through storage in the dark.(C4H9NH3)2CuCl4 exhibited two distinct absorption bands centered at 286 nm(band Ⅰ)and 384 nm band Ⅱ),which were attributed to the photo-induced exciton formed in 2D inorganic layers sandwiched by organic layers.The blue shift of band Ⅰ from 287 to 269 nm as well as the decrease of the intensity of band Ⅰ and band Ⅱ could be found when samples were irradiated under UV light for djfferent length of time.The simultaneous weakening of the intensity of the N-H…Clhydrogen bond as well as the vibration of the long Cu-Cl bond in the distorted CuCl64- octahedron could be detected from the Fourier transform infrared(FTIR)spectra,which resulted the change of charge distribution of the dissymmetric Cl-Cu…Cl bond and the resulting photochromic behavior.  相似文献   

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