简介:“Bodyclocks”arebiologicalmethodsofcontrolingbodyactivities.Everylivingthinghasone.Inhumans,abodyclockcontrolsnormalperiodsofsleepingandwaking.Itcontrolsthetimeswhenyouaremostlikelytofeelpain.Eating,sleepingandexercisingataboutthesametimeeachdaywillhelpkeepbodyactivitiesnormal.Butchangesinyourlife,anewjob,forexample,destroythebalanceandthuscausehealthproblems.
简介:在《英文角斗场》中,每篇文章都是精选自英美中小学生的读物和教材噢。想知道自己的英语水平有多高,就来试试吧。
简介:拐弯处步法是为类人动物机器人的一个基本运动。这篇论文为类人动物转弯论述一个方法,即钟拐弯处。钟拐弯处的目的是在一个静止的点改变机器人方向。计划的钟拐弯处由四步组成:脚关节轨道产生,新潮的轨道产生,膝轨道产生,和反的kinematics计算。我们的建议方法与12DOF(自由的度)基于典型类人动物结构。钟拐弯处计划的最后的输出是12条引用轨道,它被用来与12DOF控制一个类人动物机器人。ZMP(零个时刻点)作为稳定性标准被使用计划。模拟实验被进行验证我们的建议钟拐弯处方法的有效性。关键词类人动物机器人-拐弯处步法-ZMP-钟拐弯处这个工作被中国(号码60174018)的国家自然科学基础支持。唐哲在湖南省出生了,中国,在1977。他当前是在Nanyang工艺的大学的聪明的系统中心的一个研究家伙。他在清华大学从计算机科技的系收到了学士和博士度,北京中国。他的研究兴趣包括类人动物机器人,聪明的控制。孙增琪在江苏省出生了,中国,在1943。他从自动控制的系收到了学士度,清华大学在1966,并且在从Chalmers工业大学设计的控制的博士度,Gothenburg,瑞典,在1981。他当前是在计算机科学系和技术的一个教授,清华大学。他在控制系统,计算机控制理论,聪明的控制,和机器人学的电脑辅助的设计上是超过200篇论文和八本书的作者或合作者。他的当前的研究兴趣包括聪明的控制,机器人学,模糊系统,神经网络,和进化计算。刘洪波在山东省出生了,中国,在1978。他当前是在在中国北京的清华大学的计算机科技的系的一个博士候选人。他的研究兴趣包括因特网数据采矿和聪明的系统。MengJoo嗯分别地在1985和1988从新加坡的国家大学在电力工程收到了他的学士和硕士学位并且在从澳大利亚的公�
简介:Wavelength-dependentACStarkshiftsandmagicwavelengthsoftheterahertzclocktransitionsbetweenthemetastabletripletstates6s5d3D1and6s5d3D2areinvestigatedwithconsideringtheopticallatticetrappingofbariumatomswiththelinearlypolarizedlaser.Thetrapdepthsandtheslopesoflightshiftdifferencewithdistinctmagicwavelengthsoftheopticallatticesarealsodiscussedindetail.Severalpotentiallysuitableworkingpointsfortheopticallatticetrappinglaserarerecommendedandselectedfromthesemagicwavelengths.
简介:Theperiod-oneoscillationproducedbyanexternalopticalpulseinjectiondrivensemiconductorlaserisappliedtoclockrecoveryandfrequencydivision.Byadjustingtherepetitionrateorinjectionpoweroftheexternalinjectionopticalpulsestolockthedifferentharmonicfrequenciesoftheperiod-onestate,theclockrecoveryandthefrequencydivision(thesecondandthirdfrequencydivisions)areachievedexperimentally.Inaddition,infrequencylockingrangesof2GHzand1.9GHz,thesecondandthirdfrequencydivisionsareobtainedwiththephasenoiselowerthan-100dBc/Hz,respectively.Ourexperimentalresultsareconsistentwellwiththenumericalsimulations.
简介:Basedonanalyzingsignificanceofcontrollingclockindesignoflowpowersequentialcircuits,thispaperproposesatechniquethatthegatingsignalisderivedfromthemasterlatchinaflip-floptomakethederivedclockhavingnoglitchandnoskew.Thedesignofadecimalcounterwithhalf-frequencydivisionshowsthatbyusingthesynchronousderivedclockthecounterhaslowerpowerdissipationaswellassimplercombinationallogic.Computersimulationshows20%powersaving.
简介:静态、运动学的testings被使用IGS5min,30年代和5s间隔调查在精确的点放的精确卫星钟产品(PPP)答案。测试结果证明IGS卫星钟的采样率在静态的PPP答案上有很小的效果。精确卫星钟的采样间隔的所有三种类型能满足放精确性的公里厘米水平;更高的采样率没为PPP答案有重要改进。然而,卫星钟的采样率在运动学的PPP在PPP答案上有重要影响。越高卫星钟的间隔,精确性完成了越多更好。运动学的PPP的精确性完成了由用30s间隔,精确卫星钟被使用精确卫星钟和30s间隔卫星钟能几乎生产的5min间隔被将近3050%关于答案改进运动学的答案的一样的精确性。而且,从不同分析中心的精确卫星钟产品的使用可以也差不多在PPP答案上生产效果。
简介:ThispaperisconcernedwiththeclocksynchronizationproblemforIEEE1588networks.First,thesynchronizationerrorisdescribedasaboundeddisturbance,andalinearextendedstateobserver(LESO)isdesignedtoestimatethelumpeddisturbanceinducedbytheoscillatorfrequencydriftandtimestampsquantizationerrors.Then,thelumpeddisturbanceiscompensatedbytheproposedcontroller.Theproposedapproachhastheadvantagethatit'sabletodealwithnon-Gaussiandisturbanceinducedbyaccumulatedquantizationerrors.SimulationsareDrovidedtovalidatetheeffectivenessandsuperiorityoftheproposedapproach.
简介:Aschemeforall-fiberclockenhancementofnon-return-to-zero(NRZ)databasedoncross-phasemodulation(XPM)effectinnonlinearfibersisproposedanddemonstratedinsimulation.Thesimulationresultsindicatethattheclock-to-dataratioofNRZsignalsat64Gb/scanbeincreasedto22.94dBbyusingthisscheme,andthepatterneffectinclockenhancedsignalsisveryweak.Theabilityofhighspeedoperationupto140Gb/softhisschemeisalsoprovedinoursimulation.
简介:Amonolithicclock-recoverycircuitusedin622Mb/sopticalcommunicationsystemisdesigned,whichisbasedonthephase-lockedlooptheory,,andusesbipolartransistormodel.Itovercomestheshortcomingofclockrecoverymethodbasedonfilter,andimplementsmonolithicclock-recoveryIC.Thedesignedcircuitsincludephaedetector,voltage-controlledoscillatorandloopfilter.Amongthem,thevoltage-controloscillatorisamodifiedtwo-stageringoscillator,whichprovidesquadratureclocksignalsandpresentswidevoltage-controlledrangeandhighvoltage-controllingsensitivity.
简介:AbstractType 2 diabetes mellitus (T2DM), a worldwide epidemic disease, has caused tremendous economic and social burden, but the pathogenesis remains uncertain. Nowadays, the impact of unrhythmic circadian clock caused by irregular sleep and unhealthy diet on T2DM has be increasingly studied. However, the contribution of the endogenous circadian clock system to the development of T2DM has not yet been satisfactorily explored. It is now becoming clear that the gut microbiota and the circadian clock interact with each other to regulate the host metabolism. Considering all these above, we reviewed the literature related to the gut microbiota, circadian clock, and T2DM to elucidate the idea that the gut microbiota is closely tied to the regulation of the circadian clock in the development of T2DM, which provides potential for gut microbiota-directed therapies to ameliorate the effects of circadian disruptions linked to the occurrence and development of T2DM.