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LI Mao-hai HONG Bing-rong LUO Rong-hua WEI Zhen-hua 《浙江大学学报(A卷英文版)》2006,7(6):937-944
INTRODUCTION A key prerequisite for a truly autonomous robot is that it can simultaneously localize itself and accu-rately map its surroundings (Kortenkamp et al., 1998), which is known as Simultaneous Localization and Mapping (SLAM), which, when phrased as a state estimation problem, involves a variable number of dimensions. Murphy and Russell (2001) adopted Rao-Blackwellized particle filters (RBPFs) as an effective way for representing alternative hypotheses on robot paths and ass… 相似文献
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If you don’t learn to think when you areyoung,you m ay never learn.(Thom as Edison,A m erican Inventor)如果你年轻时就没有学会思考,那么就永远学不会思考。(托马斯·爱迪生美国发明家)If you wish to succeed,you should usepersistence as your good friend,experience asyour reference,prudence as your brother andhope as your sentry.(Thom as E dison,Am eri-can Inventor)如果你想成功,就应该视恒心为良友,视经验为参谋,视谨慎为兄弟,视希望为哨兵。(托马斯·爱迪生美国发明家)N atural abilities are likenatural p… 相似文献
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《语数外学习(高中版)》2007,(8)
阅读下面短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项。Americans have never before exercised and dieted as eagerly as they 相似文献
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In this study, we designed and synthesized a novel battery-type electrode featuring three-dimensional(3D) hierarchical ZnO@Ni_xCo_(1-x)(OH)_y core/shell nanowire/nanosheet arrays arranged on Nifoam substrate via a two-step protocol including a wet chemical process followed by electro-deposition. We then characterized its composition, structure and surface morphology by X-ray diff raction, energy-dispersive X-ray spectrometry(EDS), X-ray photoelectron spectroscopy, scanning electron microscopy(SEM), transmission electron microscopy, EDS elemental mapping. Our electrochemical measurements show that the ZnO@Ni_(0.67)Co_(0.33)(OH)_y electrode material exhibited a noticeably high specific capacity of as much as 255(mA ·h)/g at 1 A/g. Additionally, it demonstrated a superior rate capability, as well as an excellent cycling stability with 81.6% capacity retention over 2000 cycles at 5 A/g. This sample delivered a high energy density of 64 W·h/kg and a power density of 250 W/kg at a current density of 1 A/g. With such remarkable electrochemical properties, we expect the 3D hierarchical hybrid electrode material presented in this work to have promising applications for the next generation of energy storage systems. 相似文献
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请看一组高考题:1.Our neighbor has___ours.(03’北京卷) A.as a big house as B.as big a house as C.the same big house as D.a house the same big as(答案:B) 2.Americans eat__vegetables per person today as they did in 1910.(02’上海春季卷) A.more than twice B.as twice as many C.twice as many as D.more than twice as many(答案:D) 3.It is generally believed that teaching is__ 相似文献
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广东三年独立命题都考查了倒装句型,请看:(2004广东30)Of the making of good books there is noend;neither any end to their influence man!s lives.A.there is B.there areC.is there D.are there(2005广东23),Carolina couldn!t get the dooropen.A.Try as she might B.As she might tryC.She might as try D.Might she as try(2006广东33)So difficult it to work out theproblem that I decided to ask Tom for advice.A.I did find B.did I findC.I have found D.have I found2004年考查以否定词neither开头,句子需要倒装,又因end是单数,故答案是C;2005年考查as表示“虽然”,引导让步状语从句,需要将动词原形提前,构成倒装,故答案是A... 相似文献
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振兴教育之路在何方? 总被引：1，自引：0，他引：1
这是香港中文大学教育学院研究讲座教授(现为美国密歇根州立大学教育学院教授)杜祖贻先生应新加坡大学和新加坡教育研究所之邀所作的一次演讲。演讲稿原载《新加坡教育杂志》(Singapore Journal of Education),原文的标题是:“新知识和新思想在教育中的应用——关于振兴教育行业和教育学科的讨论”(Utilization of New Knowledge and Application of New Ideas in Education: A Discussion of the Vitalization of Education as a Profession and Discipline)。现征得杜教授本人同意后编译发表。 相似文献
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1.I hope to see him as soon as possible.(Lesson 13)我希望能尽快见到他。as…as possible意为“尽可能……”,as…as之间用形容词或副词的原形,相当于as…assb. can/could。类似的词组有:as early aspossible(尽可能早地),as many as possible(尽可能多地),as fast/quickly as possible(尽可能快地)。例如: 相似文献
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You may have thought June 14 was just Flag Day (美国国旗纪念日). Go ahead and praise the Stars and Stripes (条纹), but keep in mind that 50 years ago, the first commercially available computer was installed. Eat your heart out, Betsy Ross. The debut of the UNWAC(通用自动计算机) I changed the world almost as much as the founding of America. 相似文献
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黄卫峰 《第二课堂(小学)》2010,(1)
Wu Kequn's Rocky Road to Success Wu Kequn(吴克群)has become popular with a series of albums such as Big Tongue(《大舌头》),A General Order(《将军令》)and Poems for You(《为你写诗》),all of which are composed by himself.His talents in music and lyric have won the admiration of his fans. 相似文献
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A:Whose book is this?
B:It's mine.Why do you ask?
A:Could I borrow it? I've been wanting to read it.
B:Be my guest (欢迎你来借书),but I warn you.It's not as good as they say.
A:What's the matter with it?
B:Well,for one thing the plot (情节) is highly improbable (很不真实) and for another,the characters seem more like paper dolls than people (太不真实).
A:That's strange.Usually that author does a good job of characterization (性格描述).I've read three of his books and thought they were all well done.
B:I've been a fan of his for a long time too,but he really flubbed (失败 ) on this one. 相似文献
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李士芗 《现代远程教育研究》2000,(3)
综合练习 A1 完形填空(10分)Men first measured time (1) using a stick in the ground.The length of the (2) shadow would (3) what time of day itwas.(4),the Egyptians used a pillar,(5) as a gnomon,andthen developed a simple sundial,(6) consisted of a stone with apointer on it.The stone was placed in an east-west direction,and the shadow of the pointer showed the time.About 300 BC,a Babylonian (7) Berosus invented a semi-circular sundial,(8) he marked twelve hours.The Babyloni-am,like the Egyptians,divided daylight (9) twelve parts andnight into twelve.This meant that an hour would have differ-ent lengths (10) different times of the year.A daytime hourmight be longer or shorter than a nighttime one.These hoursare known as 'temporary hours'.(1)A.with B.byC.through D.in 相似文献
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第l卷(选择题共75分)一、听力侧城都分(略) 枯城部分(A.)二、‘砒知识(共20小题,礴分60分) 从A、B、C三个选项中,选出可以坟人空白处的最佳答案。(本题共印分,每小题3分)21.YOufo卿t your dietion哪?YOum即have A.me B.my C.而ne22.一15 there a bus to the 200? 一I’m曲aid there’5 bus to the 200. A.no B.明y C.some23.ourte鹅her’5 offiee 15 on A .the three noor B.n加r Thi记 C .the third floor24.They had a elass meeting_Frid叮 硫ernoon. A.at B.in C.on25.Green eajrne to China inZ《X洲)he has lived here ever sinee. A.and B.or C.but26.The horse 15 old and eannot run it did. A .as faster as B.50 fast than C.as f... 相似文献
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谢丽 《中学英语园地(高三版)》2004,(Z2)
历年中考英语试卷都有对状语从句的考查。从2002～2003年全国部分地区中考英语试卷对状语从句的考查内容来看,命题热点主要集中在以下几个方面:【热点一】对时间状语从句的考查【试题精选】1)我一到美国就给你打电话。IllringyouupsoonIgettoAmerica.(北京市海淀区)2)昨天直到雨停了,孩子们才离开学校。Thechildrenleavetheschooltherainstoppedyes-terday.(北京市海淀区)3)IttenyearssincetheytoFrance.A.as;coveredB.was;havemovedC.is;havemovedD.is;moved(河北省)4)Hewaituntiltherain.A.wont;willstopB.wont;stopC.will;stopsD.w… 相似文献
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《河北自学考试》2005,(11):44-48
PARTONE(60POINTS)Ⅰ.语法、词汇。用适当的词填空。从A、B、C、D四个选项中,选出一个正确答案,并在答题纸上将所选答案的字母涂黑。(本大题共25小题,每小题1分,共25分)C om plete each of the follow ingsentences w ith the m ost likely answ er.(25points)1.I don't think possible to master a foreign languagewithout much hard work.A.this B.that C.its D.it2.Tuition in some western universities runs twenty thou-sand dollars a year.A.so high as B.as high asC.so high to D.as high to3.The beauty of the Yel… 相似文献
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美国数学教育改革的新思维 总被引：1，自引：0，他引：1
为了响应振兴数学和科学教育的国家紧急需要,美国国家研究委员会(NRC)于1989年发表了关于数学教育现状与前景的报告《人人有份》(Everybody counts:A Report to the Nation on the Future of mathematicsEducation),又译作《人人关心数学教育的未来》),该报告调查了美国从幼儿园到研究生阶段的数学教育状况,指出了目前美国数学教育中存在的严重问题,它不仅认识到问题,而且制订了今后行动的总方针。式 相似文献