小提琴曲，原来的4/4拍，怎么忽然变成了3/4拍？为什么没有一拍的休止符（红箭头处）？红箭头前的一拍要拉成一拍然后休息一拍，还是拉成两拍？谢谢！[阅读全文]
博文
(2023-12-02 09:08:54)
(2023-11-26 17:01:04)
我和我的中学同学。我们是男校，没有沾花惹草的绯闻，只有还像昨天一样的记忆。我把照片的日期删掉了。我是前排左1。应该是班里生日最晚的，一百米跑得最慢的。中间左2的同学在文革中去外地串联“支左",大概是在四川”牺牲“了。那是文革中有一天，忽然间在大街上看到大幅标语“为xxx烈士报仇”才得知的。功课很好的一个同学，太可惜了。中间左[阅读全文]
(2023-11-21 06:43:13)
Ifabatteryisonashelfandyoudonothingwithit,itsvoltagewilldropgradually,whichiscalledshelflifeofthatparticularbattery.Ihaverecordeddailyvoltagedropofdifferentrechargeablebatteriesformorethan10years.Ionlyputthefirsttwotothreeyear'sdataonthegraph,sincethesoftwarei'musingwillnothandlethatamountofdata.Thebatterieswhichvoltageswererecordeddailyare:1.Rayovacrechargeable,AAA,NiMH.1.2V2.EnergizerAAA...[阅读全文]
(2023-11-19 14:15:12)
1.Lithiumionshelflife.Method:Justrecordthebatteryvoltageeachdayfor3years,usingamultimeter.Result:Lithium-ionbattery(9V)shelflifein3years:2.Lithium-ionchargingcharacteristics.Method:Charginglithium-ionbatterywithaconstantvoltageandaconstantcurrent,recordthevoltageandcurentinevery5minutes.Battery:NikonEN-EL3abattery(7.4V,1500mAh):WhydoIchoose8.4Vand0.6A?BecausethechargerfromNikonMH-18specified8.4Van...[阅读全文]
(2023-11-19 07:41:29)
Lithium-ionbatteriesisalmosteverywherenowadays,inyourphone,inyourlaptop.Accordingtothelinkbelow,
https://www.google.com/search?q=the+life+of+lithium+ion+battery&rlz=1C1IHCB_enUS722US729&oq=the+life+of+lithium+ion+battery&gs_lcrp=EgZjaHJvbWUyBggAEEUYOTIKCAEQABgPGBYYHjIICAIQABgWGB4yCggDEAAYDxgWGB4yCAgEEAAYFhgeMggIBRAAGBYYHjINCAYQABiGAxiABBiKBTINCAcQABiGAxiABBiKBTINCAgQABiGAxiABBiKBTIN...[阅读全文]
(2023-11-03 08:26:43)
Thegardenisinzone6. From:https://www.brecks.com/zone_finder Tomato,cucumber,pepper: A.Seedinginroom: OnMarch18,putseedsoftomato,pepper,cucumbersindirt. Soil: Inpapercups,fillthebottomhalfofthepapercupwithgardensoil,thenfillthemiddle1/4cupwithaseedingstarter(mixtureofsoilandfertilizer)andfillthetop1/4cupwithgardensoilagain. Mixthetoptwosoilsandburytheseedsinaround0.5-1c...[阅读全文]
(2023-10-31 11:20:56)
Forclose-upphotography,someequipmentsareneededA.Macro(NikoncallsMicro)lenses:1.CanonMP-E65mmf/2.8,1-5x2.Canon60mmf/2.81x,internalfocus3.Tamron90mmf/2.8forNikon,1x4.Quantaray60mmf/2.8forNikon,1x5.Tamron60mmf/2.0forNikon1xinternalfocusAmacrolensisaspeciallens,youcouldtakearegularpictureaswellasaclose-uppicturewithit.Lifesizedobject'simagecanbetakenintoyourpicture.Mostmacrolenscanget1xsizeofyouro...[阅读全文]
(2023-10-30 10:13:54)
OneWXCfriendaskedmetowritesomethingaboutWagner,thisiswhatIreadandtranslated.Thisarticlebasicallyisasummarybytranslationfromabookchapter【1】。 理查德瓦格纳 （5/22/1813-2/13/1883） 贝多芬的音乐支配着19世纪上半期，瓦格纳的音乐则笼罩着它的后半期。瓦格纳的歌剧改编了音乐的进程。以超人自居的瓦格纳，以自己的歌剧和实践给世界创造了一个作为艺术家的英雄，而且到达了前所未有的程度。 [阅读全文]
(2023-10-28 07:07:01)
Sonicboomisanimpulsivenoisesimilartothunder.Itiscausedbyanobjectmovingatthespeedofsound--about343meterspersecondor767milesperhouratsealevelandat68degreesFahrenheit. Whentwoobjectsreachthesamefrequency,aphenomenoninphysicscalledresonanceoccurs. Resonanceisaphenomenonthatoccurswhenanobjectorsystemissubjectedtoanexternalforceorvibrationthatmatchesitsnaturalfrequency.Whenthishappens,theobjec...[阅读全文]
(2023-10-26 08:05:36)
AfriendofWXCaskedmehowtoconnecttwowireswithoutsoldering.Youfirsthavetofindthegaugenumberofyourwire.Thereisawirestandard,AmericanWireGauge(AWG).Forexample,thiscopperwireis8AWGfromthechart,sinceitsdiameteris3.26mm:Manyconnectorpartsarecolorcoded.Colorsonthewireconnectorsare.byBard:Youhavetohaveawirestriper,Iusenumber2and3often:1.For10-22AWG2.For10-20AWG3.For20-30AWGsolid,32-22AWGstranded4.For18-10AW...[阅读全文]
