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今年的国庆假期，我和妈妈乘坐高铁去外婆家玩。这可是我第一次坐高铁哦，心情激动极了！10月1日傍晚，迎着迷人的晚霞，我和妈妈来到温州火车南站。哇！火车站好壮观啊！里面人山人海，我感觉自己都像一只小蚂蚁了。通过检票口后，我们远远地就看到“和谐号”像一条长长的白龙趴在轨道上，我们赶快找到自己的位置坐下来。不一会儿，车子慢慢地启动了，接着开始加速，越开越快，窗外的景物从眼前一晃而过就被远远地抛在车后。车子飞快地向前奔跑着，我静静地坐在位置上左看右看，感觉有趣极了！到达杭州站停靠的时候，突然一阵震耳欲聋的雷声从我身边滑过，吓得我一下子就从座位上跳了起来。后来仔细一看，原来是另一辆高铁从我们身边开过。车子重新启动，不一会儿，我们就到了目的地——湖州站。这次我们只坐了三个半小时的车就到外婆家了。希望以后的高铁速度越来越快，让我每个周末都能来外婆家玩！
初中物理有关动车的创新题动车组列车进站前的减速过程分为两个阶段进行:第一阶段采用“再生刹车”技术，速度从250km/h减至90km/h，这期间停止动力供给，列车依靠惯性继续前行，并带动发电机发电;第二阶段采用机械刹车，速度从90km/h开始不断减小直至停止;关于列车进站过程中的能量转化，下列说法中正确的是( ) A.第一阶段减小的动能全部转化为电能，即电能等于减小的动能。 B.第一阶段减小的动能有一部分转化为电能，即电能小于减小的动能。 C.第二阶段减小的动能主要转化为内能，且内能等于减小的动能。 D.第二阶段减小的动能主要转化为内能，且内能大于减小的动能。 和谐号从北京出发，目的地为天津。全程200公里，列车出站时的时速为每小时60公里，列车最高时速是300公里/小时，入站时的时速降为40公里。列车全程行驶了26分钟。问以上三个速度分别行驶了多少公里? 北京到上海的距离为1000km。假设声音在空气中能够传得这么远，那么从北京传到上海需要多长时间?火车从北京传到上海需要多长时间?大型喷气式客机呢? 以上这些关于动车组计算初三物理试题只是有代表性的几个题目，我们可以根据自己的需求去求助老师或者同学，让他们帮你理清这些估算题的具体算法。和谐号动车组在武汉与广州之间运行，最大运营速度为394km/h。当动车组用4800kW的牵引功率使列车以50m/s的速度匀速直线行驶时，动车组所受的阻力f有多大？
急需一篇关于高速铁路的英文论文，字数不限RA ILWAY CONSTRUCTION TECHNOLO GYGet an a ll2round understanding of the standard system forpa ssenger dedica ted ra ilway and establish a new concept ofra ilway constructionJ in ShouhuaAbstract Discussions were made of p rimary p rincip les for un2derstanding of standard of passenger dedicated railways, particu2larly technical standard for track work, subgrade work, bridgework, and tunnelwork, etc. , as specified in five design codes,namely J ingHu High Speed Railway, 250km /h Passenger Dedi2cated Railway, 200km /h Passenger Dedicated Railway, Passen2ger and FreightMixed Railway, and Speed Increase of ExistingRailway. Specific recommendationswere raised concerning vari2ous specialties.Keywords passenger dedicated railway, construction standard,key technology, understandingCon struction equipment for track work of pa ssenger dedica2ted ra ilwayZeng ZonggenAbstract A descrip tion is given to ideas for construction equip2ment for passenger dedicated railway according to characteristicsof track work and experience learned from abroad and QinShenPassenger Dedicated Railway in China. Relevant recommenda2tionswere raised.Keywords passenger dedicated railway, track construction,construction equipmentRecommenda tions on design and lay ing of turnouts for highspeed ra ilwayJ ia Zh iwuAbstract Turnouts are the weakest point of track structure inhigh speed railway, and are key equipment controlling runningspeed of trains. An analysiswasmade of existing p roblems in de2sign, manufacture, and laying of turnouts, and imp rovement o2p inionswere given.Keywords high speed railway turnout, structure design, layingof turnouts, recommendationThe exactitude position method for 2 000 t prefabr ica ted boxbeam on pier topShen YangyunAbstract Based on the 2 000 t p refabricated box beam erectionof Donghai B ridge, in this article, the work p rincip le of the slip2page exactitude position equipment on p ier top and exactitude po2sition method for large2scalemembers setting are introduced. TheF4 board set at temporary bearing bottom are adop ted to be theslipp ing surface for exactitude position equipment. The p lane po2sition of box beam on p ier top is adjusted by level jack. Boxbeam setting highness is controlled effectively with steel sandjack p re2p ressed before used. The equipment is used to erect po2sition for large2scale box beam and p recision of its p lane positionand highness can meet comp letely the expectations that code or2dain.Keywords large2scale box beam, erection, exactitude positionAna lysis of sta tica l and dynam ica l test of large span one tow2er cable2stayed br idgeSh i Zhou, Cao F ahu i, Pu Q ianhu iAbstract Test the deflection of the beam and the tower, thechange of tension of the cables, and the stress of the beam andthe tower of Yibin Zhongba J inshajiang River B ridge ( one tower252 m2span cable2stayed bridge) under static loads. The test re2sults indicate that the structure has enough stiffness and strength. The natural vibration of the structure is tested, and the impactof the passing vehicles is analyzed. And the uses of results ofstatic and dynamical tests in damage detection during the serviceperiod of the bridge is analyzed.Keywords Cable2stayed bridge, static test, dynamical test,natural vibration, impactAna lysis of the surface settlements due to shield tunnelingZhang Ha ibo, Yin Zongze, Zhu J ungaoAbstract The ground surface settlements due to earth2p ressure2balance shield tunnelingwas simulated using 32D nonlinear finiteelement p rogram. Those influence factors such as overlay soildep th, outside diameter of the tunnel, cabin earth p ressure, andthe tail voids were studied. A calculation formula was p roposedbase on the upper analysis, the comparison between the calculat2ed and measured surface settlements in Pearl L ine of ShanghaiMetro from South Pudong station to Nanpu B ridge station p rovedthe reasonability and credibility of the p roposed.Keywords metro, surface settlement, influence factor, formulaApplica tion of CFG piles in the ground consolida tion con2structionsL v Q inAbstract In the groundswith lower capacity, ground consolida2tion by CFG p iles can form composite foundation, not only im2p rove soil capacity, but also reduce cost of construction andshorten work term, compared with other consolidatingmethods.Keywords ground consolidation, CFG p iles, composite foun2dation, ground capacity, settlementD iscussion on manufactur ing techn ique of ra ilway tracksleeper of long line pedesta lXiao HongzhangAbstract This paper introduces the characteristic of manufac2turing technique of railway track sleeperwith a method of flowingwatermachine and a method of long line pedestal by our countryp resent condition, elaborating the important point of long linepedestal technological design, construction method, quantitycontrol and the quantity examination, putting forward the im2p rovement suggestion to the existent p roblem suggestion.Keywords method of pedestal, track sleeper, manufacturingtechnique, quantity control
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