Effects of the internal waves on the time correlation of the acoustic fields in the East China Sea

Internal waves are one of the primary causes of sea water mass variations in shallow water. The time stability of an acoustic channel may be degraded by the activities of internal waves. Based on the oceanographic data of Asian Seas International Acoustics Experiment (ASIAEX), the characteristics of the internal waves in the East China Sea (ECS) are analyzed and the effects of linear and solitary internal waves on broadband acoustic field correlation are numerically investigated. The numerical results of the length of the correlation time affected by the internal waves are compared with the experimental data. It was found that the existence of both linear internal waves and soliton packets may be one of the explanations of the experimental correlation drop.     

Asseessment of the Impact of the Qinghai-Tibet Railway on the Tourist Scenery in Tibet

Theqinghai TibetPlateauisendowedwithnaturalandgeographicconditions.These conditionsshapeupmanyuniquetouristresources,suchascolorfulgeomorphology,plentifulanduniquewildanimalsandplantsand pureandsimplefolkcustomwithancientculture,etc.Butasthetrafficisnotconvenientandthe trafficcostisveryhigh,toalargeextentthislimitsthedevelomentofthelocaltourism.Thelinesuccessivelypassesthroughtheplacesof culturalinterest,likenaturallyecologicallandscapesandagriculturalareas,semi agriculturalandmemi pastoralar…     

Archaeological discovery and research on the remains of the paleoflood of the Yuxi site

The research of the paleoflood remains from archaeological sites is one of the most important jobs in the environmental archaeology.Based on the traditional archaeological methods and the archaeological finds from the Yuxi site,Fengdu County of Chongqing,the paper analyzes the difference between the cultural layers and the possible paleoflood layers from various angles,such as contents,shapes of gravels,pottery,etc.,identifies the possible paleoflood deposit layers,i.e.the paleoflood remains of the Yangtze River,and discusses the periodicity of the floods.     

On the Cultural Difference in the Teaching

This paper makes an analysis on the Cultural difference in the teaching. Cultural difference can be reflected in many aspects in the teaching, so the foreign language teachers should fill their course with cultural factors.     

Cosmic—Ray Deficit from the Directions of the moon and the Sun Detected with the Tibet Air Shower Array

本文主要讨论西藏羊八井用来检测太阳与月亮宇宙射线阴影的空气簇射阵列及太阳与地球之间磁场的作用。     

Research on the Arc Interpolation for the Nonstandard Section Curve of the Piston

IntroductionPistonisanimportantpartoftheautomobilemotor .Nowitscommonlyused profileisthemiddle convexandvaryingellipseprofile[1] .Thiscomplexprofileleadstodif ficultiesinmachining ,soithasbeenaresearchproblemforscholarsallovertheworld .Heretheinterpolationofthetransversesectioncurveisdiscussed .Whenweaccuratelyfinishcurvecontours,itisnecessarytogenerateatoolpathbysomeinterpolationmethod .Atpresent,thefunctionofthelinearorthecirculararcinterpolationinNCmachineisgenerallyusedforthispurpose[2 ]…     

The Symbolism of the Old Man and the Sea

老人与海是海明威的著名著作,通过它我们可以看到海明威对象征主义的运用。当然,他同时运用了现实主义,比喻意义以及冰山理论等。但是这里仅着重研究象征主义,特别是圣地亚哥的宗教意义以及马洛林的象征意义。     

Licensing of the Construction Permit of the NHR-200

ＩｎｔｒｏｄｕｃｔｉｏｎＩｎｏｒｄｅｒｔｏｍｉｔｉｇａｔｅｔｈｅｐｒｏｂｌｅｍｓｏｆｅｎｅｒｇｙｓｈｏｒｔａｇｅ，ｅｎｖｉｒｏｎｍｅｎｔａｌｐｏｌｌｕｔｉｏｎａｎｄｔｈｅｏｖｅｒｂｕｒｄｅｎｅｄｔｒａｎｓｐｏｒｔａｔｉｏｎｓｙｓｔｅｍｓｉｎＣｈｉｎａ，ｕｎｄｅｒｔｈｅｓｕｐｐｏｒｔｏｆｔｈｅｓｔａｔｅ，ｔｈｅｎｕｃｌｅａｒｈｅａｔｉｎｇｒｅａｃｔｏｒ（ＮＨＲ）ｗａｓｄｅｖｅｌｏｐｅｄｂｙｔｈｅＩｎｓｔｉｔｕｔｅｏｆＮｕｃｌｅａｒＥｎｅｒｇｙＴｅｃｈｎｏｌｏｇｙ（ＩＮＥＴ），ＴｓｉｎｇｈｕａＵｎｉ…     

Erosion of the prismatic layer by the organic matrix during the formation of the nacre-prism transition layer in the shell of Pinctada fucata （Bivalvia, Mollusca）

Three variants of the sequence of formation of the nacre-prism transition layer were observed in Pinctada fucata (Bivalvia, Mollusca) shells. In each case, the layer was formed by the organic matrix secreted by the mantle, together with the interprismatic organic envelope. The continuity of the organic phase throughout the shell was maintained as the new nacreous layer was formed on the nacre-prism transition layer. Changes in the interprismatic organic envelopes on either side of the nacre-prism transition...     

Environmental archaeology of the Dachang region in the Daning Valley,the Three Gorges reservoir region of the Yangtze River,China

Environmental archaeology of archaeological sites on both sides of the Dachang section in the Daning River,the Three Gorges of the Yangtze River,shows that riverbed evolution has a great influence on the distribution of archaeological sites during the prehistorical and historical period,and it restricts human activity and the development of ancient culture.Field investigation,dating data,paleocurrent analysis of 100 gravels on the riverbed and archaeological excavation reveal that the riverbed of the Dachang section developed in the Shuangyantang region during the early stage,after about 30 kaBP it shifted westward gradually and reached the present place.Along with the westward shift,the focus of ancient culture changed for several times.In the Western Zhou Dynasty’s period,the east riverbank of the Daning River was the main residential area.During the Han Dynasty,along with the westward shift,the living space of ancient people was no longer confined to the east riverbank and the focus of culture moved westward.Then the Zhangjiawan site became the main dwelling district.In the late Han Dynasty, the villages were flooded and the ancients had to immigrate to a high place.Tombs of the Han and the Jin Dynasties outcropped on the flood plain of the east bank because their surface sediments were eroded by several flood events and the westward shift of the riverbed.     

Elemental composition in the sediments of the Yangtze and the Yellow Rivers and their tracing implication

Elemental compositions in the surface sediments of the Yangtze River and the Yellow River are quite different. The Yangtze River' s sediment is rich in K, Fe, Mg, Al and most of trace elements, and its elemental composition show remarkable spatial variations, whereas the Yellow River s sediment has higher contents of Ca, Na, Sr, Ba, Zr and Hf, and the elemental composition remains relatively stable. The ratios of some elements are also different in the sediments of the two rivers. The elemental composition of the Yangtze River sediment results from widely distributed igneous rocks and complicated source rocks and strong chemical weathering in the Yangtze River catchment basin, while the main provenance of the Yellow River sediment is the Loess Plateau which has dominant influence on the elemental composition, and the intense physical weathering is another controlling factor. The elements such as Cu, Zn, Sc, Ti, Fe, V, Ni, Cr, Co, Li and element ratios such as La/Sc, La/Co, Th/Co, Ti/Zr and Zr/Y can be used as the tracers to distinguish the Yangtze River sediment from the Yellow River s. The tracers can be used in the study of the mixing and distribution of the substances of the two rivers matters in coastal zones of China.     

Study on the Pigments of the Colored Cotton

IntroductionIn recent years, the colored cotton produced bygenetic engineering is well known to consumers in China.Because they needn t to be dyed with synthetic dyes andtheir processes will not pollute environments, the textileproducts made of colored cottons can meet the standard of“ISO14000”[1]. Colored cotton can be used in apparel andhousehold fabrics. The knitting wear made of coloredcotton that touch directly with skin could give comfort,hand and health …     

Study of the Relationship Between the Organizational Climate and the Campus Ethical Issues of Universities across the Taiwan Strait

The study applied the approach of empirical studies to select 176 teachers in 9 universities in Taiwan and Inland in China to deliver questionnaires. The study intended to explore the influence of organizational climate on campus ethics and its diversity between the universities across the Taiwan strait. The study explored that the organizational climate in the universities across the Strait was not ethically high. Yet, the universities in Inland emphasized more on campus restraint in teachers‘ behavior, job performance and their sense of belonging to the school. The study result demonstrated that improving leadership of the universities could enhance teachers‘ identification with their schools and could promote the level of campus across the Strait.     

Zircon U-Pb SHRIMP dating for the volcanic rocks of the Xiong’er Group: Constraints on the initial formation age of the cover of the North China Craton

The volcanic rocks of the Xiong’er Group occurringwidely in the southern part of the North China Craton,overlay the Archean and Paleo-Proterozoic crystallinebasement and are overlain by middle to late Paleozoicterrigenous detrital rocks, carbonate and tillite. TheXiong’er Group crops out over an area of more than60000 km2 in a thickness ranging from 3000 to 7000 m,the largest magmatism after the formation of the crystal-line basement of the North China Craton (Fig. 1(a)). TheXiong’er …     

Effects of the internal waves on the time correlation of the acoustic fields in the East China Sea

Theactivitiesoftheinternalwavecanmakethetemperatureoftheseawatermassvarywithtimeandspace ,andthencanaffectthesoundpropagationinthesea[1～ 7] .Inaddition ,itcanreducethecorrela tiontimeoftheacousticfields .Forexample ,intheSWARM 95experiment,thecorrelationtimeatarangeof 4 0kmislessthan 2minutes[6 ] .InJune 2 0 0 1,theAsianSeasInternationalA cousticsExperiment (ASIAEX)wasperformedintheEastChinaSea (ECS) .Acombinedacoustic/ physicaloceanographicexperimentalmeasurementwas per formedtostu…     

Build the First-class Plateau Railway in the World

The construction engineering of Qinghai-Tibet railway is fonnidahle but magnificent with very complicated geological conditions, facing “three difficult problems” of permafrost, severe coldness ＆ oxygen deficiency and fragile ecology. All of the working staff stick to human foremost principle, upgrade construction concept, realize the management innovation, implement the legal person responsibility system for construction project, form the management system featuring in the integration of quality-environment-occupational health ＆ safety, optimize project organization ＆ coordination s.vstem and establish the complete ＆ rigorous construction target system. Tackle the difficuhty of permafrost relying on science and technology and the finished roadbed, bridges and tunnels are in stable condition. Carry. out the basic national policies and protect geological environment, being the leading position in the construction of important and key construction projects and of demonstration significance. Insist on human foremost principle and guarantee the occupational health, creating the altitude medical miracle of “zero death of high-ahitude disease, zero occurring of SARS and zero spread of plague”. The construction also advances and implements “three specific requirements”, that is, the train passes the plateau in fast speed, high-reliable and less maintenance of operation equipment and minimum management staff of the line.     

On the Development of the Students'''' Pragmatic Competence in the Middle School English Teaching

I.IntroductionIn the middle school English teaching,vocabulary andgrammar rules were once considered as the main contents of theclassroom teaching.It seemed satisfying that the students couldmerely understand the grammar and remember all the wordsand expr…     

Assessment of the Impact of the Qinghai-Tibet Railway on the Tourist Scenery in Tibet

This article briefly makes account of the characters of the tourist resources along the Qinghai-Tibet Railway. According to the diversity and distinctiveness of the natural landscape along the Qinghai-Tibet Railway, its scientific studying values, aesthetic values and cultural values are summaized in this text. The article analysed the main types of construction of the Qinghai-Tibet Railway which would cause impacts to the landscapes along the line： roadbed construction, grounds of fetching and abandoning soil, sand and gravel material field, pavement for constructon, construction camp, etc. The impacts caused by construction of the Qinghai-Tibet Railway to the tourist scenery in Tibet are raised and the preventive and restorative measures needed to be taken to reduce and ease up the impacts of the railway project to the landscapes long the line are offered. The various measures raised above are in line with the characters of the Qinghai-Tibet Railway and are operational.