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V、练习参考答案练习1I、1、the（各项均为负。)2、the;a（功率额定值是电阻器不会引起温度太大的上升而能安全地耗散的最大功率。）3、an（这是均方根值伏特计。）4、The;a（该设备的成功设计需要详细地了解性能指标。）5、the;a;a（在氢原子的布尔模型中，一个电子绕一个质子以半径为R的圆周运转。）6、the（电阻的单位是欧姆。）7、an（这是一个h参数。）8、/;/（图5－1画出了Oersted的实验。）9、A;a;a（机器是能够传递力来完成某一确定目的的一种设备。）10、/（水压机将在第14章加以考虑。）11、the;the[/]（我们容易确定参数μ的值。）12、/;the（根据式（2－1），我们得到以下的关系式。）13、the;/（作者工作在位于阿林顿的得克萨斯大学。）14、an（甚至当积分区间并不是无穷时，能够恰当地显示一个时函数的傅氏变换的仪器是多么重要啊！）II、1.Dr.EmmetgraduatedfromHarvardUniversityin2001.2.ProfessorLiearnedhisPh.D.degreeinmechanicalengineeringfromtheXi’anUniversityofTechnologyin1988.3.Nowweshallturntothediscussionoflocalareanetworks.4.TheBainbridgemassspectrometerisasimportantaninstrumentastheopticalspectrometer.5.Howlongatime[或Howmuchtime]isrequiredtothisexperiment?Thedensityofasubstanceisitsmassperunitvolume.6.Anincreaseinpressurealwayscausesadecreaseinvolume.7.Fig.(2-5)showswhatisexpressedbyEq.(2-2).8.Theunitofinductanceisthehenry.III、1.TheUASMAprotocolemploysauniqueframestructure.2.Finally,abroadsteppedimpedancetransformerisdesignedbythismethod.3.Dynamicanalysisandevaluationofthesecurityofaproactivesecretsharingsystem4.Theapproachcanbeappliedtotheone-dimensionalpotentialbarrierwithanarbitraryprofile.5.WeproposeanumericalmethodbasedonNewton’siterativemethod.练习2I、1.Thiscircuitconsistsofabattery,aninductorandacapacitor.2.Computetheelectricfieldsatpointsa,b,andc.3.ThissatelliteisusedforcommunicationsbetweentheUnitedStatesandGreatBritain,FranceandItaly.4.Weassumethattheantennaisverticalandthatitslossiszero.5.Chapters6,7,and8dealwithtransmissionlines.II、1.Itserrorissixpartsin1012.2.Thiscomputerstoresfourtimesmoreinformationthanthatone(does).3.Thedemandforthiskindofequipmentinthenearfuturewillbe20timeswhatitis.4.Thevoltageacrossthiscomponentisafewtenthsofavolt.5.Nowitsinternalpressureisonethirdwhatitwas.III、1.Thisobjectisoverfivetimesheavierthanthatoneis.2.Unlessotherwisestated,itisassumedthatsilicontransistorsareusedandthatICBOcanbeneglected.3.Thiscircuithastheadvantagesofsimplestructureandeasyadjustment.4.Figs.1,2,and3showthisprocessindetail.5.Forfurtherinformation,consultreferences[3,5,9].练习3I、1.Thisnewtypeofcomputerhasmanyadvantagesoverthegeneraltype.2.Itisnotdifficulttosolvethisdifferentialequationfortheunknownquantity.3.Ofthesefivenewchapters,thefirstonedealswiththebasicprinciplesofnegativefeedback.4.Atthispoint/time,currentdiffersinphasefromvoltageby90o.5.Byanalyzing[Bytheanalysisof]theparametersoftheinstrument,wecanunderstanditsperformance.6.Wewillfindoutitsaveragevelocityoverthisdistance.7.Thescienceofelectronicsistooimportantintheworldtoday.8.Theysolvedthisproblemwithgreatdifficulty.II、1.Forx＞1,thereisnosolutiontothisequation[thisequationhasnosolution].2.Upon[On]substituting[substitutionof]thesevaluesinto[in]theequation,weobtainedthefollowingexpression..3.ThiscircuitissimilarinoperationtothatofFig.1-10.4.Thiscomputerisverygoodinperformance.5.Thesewavestravelonlyinonedirection.III、1.Thispaperpresentsanewmethodfortherecognitionofradartargets.2.TheinfluenceofthemovingstateofthetargetonthetrackingaccuracyoftheEKFisgreat.3.Anothercomsatwaslaunchedonthemorningofthe8thofOctober.4.Voltageismeasuredinvolts.5.TheywillleaveforBeijingtoattendaninternationalconferenceonmobilecommunication.6.Unlessotherwisestated,itisassumedthatsilicontransistorsareusedandthatICBOcanbeneglected.7.练习4I、1.Theforceactsperpendiculartothesurfaceofthetable.2.Thethreecoefficientshereremainstobedetermined.3.Thetwoequationsbelowwillbeoften(frequently)usedinlaterchapters/inthechapterswhichfollow.4.Hereweusetwometalballs10cmapart.5.Theoutputremains/staysconstant/unchanged/fixed/unaltered/thesame.6.Allthetextbooksavailablediscussthisproblem.7.Accurateinoperationandhighinspeed,computershavefoundwideapplications.8.Theanswertothisproblemlookscorrect.9.Twoparallelwiresadistance(of)δapartcarrythecurrenti.10.Theproblemnowishowtomeasurethevoltageacrossthiscomponent.11.Thesedatawillbesenttothecomputingcenter2kilometersaway.12.Uponrearrangingtheequationabove,wehave[get,obtain]thefollowingexpression.13.Thesechargescaninteractwithotherchargespresent.14.Forcescanbetransmittedwithoutcontact,contrarytothecommonbelief.15.Thiscoefficientistypically0.35.II、1.Inthiscase,theinputdoesnotfall;nor[neither]doestheoutput.[…;theoutputdoesnotfall,either.]2.Theresistanceofaconductordependsnotonlyonthematerialofwhichtheconductorismade,butalsoonthesizeandtemperatureoftheconductor.3.Thesescientistsareveryinterestedinthistopic.4.Thisparametercanhardlybemeasured.5.Inthislaboratory,thisinstrumentismoreexpensivethananyotherone/anyoneelse.6.Thefeaturesofthisdevicearesmallsizeandlightweight.练习5I、1.Thisequationcanbesolvedineitherofthefollowingtwoways/thetwowayswhichfollow.2.Thisbaseballwillsooncometorestbecauseofitsinteractionwiththeground.3.Ourchoiceofthiscoefficientas1iscorrect.4.Fromitsdefinitionastheratioofaforcetoalength,wecanseethatkhasthesameunitaswork(does).5.Ouranalysisofthemachineisofgreatsignificance.6.Thisfacilitatestheiruseincircuitanalysis.II、1.Thispolicecarisequippedwithareceiverthesizeofamatchbox.2.Wiresonehun