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第100章

thelongitudeofthenodeofptoreferredtothelongitudeofthenodeofneptune,θ3=&oga;p&;&oga;n,circulatesandtheperiodofthiscirculationisealtotheperiodofθ2librationwhenθ3beeszero,iethelongitudesofascendgnodesofneptuneandptooverlap,theclationofptobeesaxiu,theeentricitybeesiuandthearguntofperihelionbees90°whenθ3bees180°,theclationofptobeesiu,theeentricitybeesaxiuandthearguntofperihelionbees90°agawillias≈ap;benn(1971)anticipatedthistypeofrenance,laternfirdbyilani,nobili≈ap;carpo(1989)

anarguntθ4=ϖp&;ϖn+3(&oga;p&;&oga;n)libratesaround180°withalongperiod,&si;57&tis;108yr

ournuricaltegrations,therenances(i)–(iii)arewellataed,andvariationofthecriticalarguntsθ1,θ2,θ3reasiilardurgthewholetegrationperiod(figs14–16)however,thefourthrenance(iv)appearstobedifferent:thecriticalarguntθ4alternateslibrationandcirculationovera1010-yrti-scale(fig17)thisisanterestgfactthatkoshita≈ap;nakai&39;s(1995,1996)shortertegrationswerenotabletodisclose

6discsion

whatkdofdynaical插nisatasthislong-terstabilityoftheplaarysyste?wecanidiatelythkofoajorfeaturesthatayberesponsibleforthelong-terstabilityfirst,thereseetobenosignificantlower-orderrenances(anotionandsecular)beeenanypairaongtheneplasjupiterandsaturnareclosetoa5:2anotionrenance(thefao&lso;greateality&rso;),butnotjttherenancezonehigher-orderrenancesaycaethe插oticnatureoftheplaarydynaicalotion,buttheyarenotstrongastodestroythestableplaaryotionwiththelifetiofthereallarsystethesendfeature,whichwethkisoreiportantforthelong-terstabilityofourplaarysyste,isthedifferencedynaicaldistancebeeenterrestrialandjovianplaarysubsystes(ito≈ap;tanikawa1999,2001)whenweasureplaaryseparationsbytheutualhillradii(r_),separationsaongterrestrialplasaregreaterthan26rh,whereasthoseaongjovianplasarelessthan14rhthisdifferenceisdirectlyrelatedtothedifferencebeeendynaicalfeaturesofterrestrialandjovianplasterrestrialplashavesallerasses,shorterorbitalperiodsandwiderdynaicalseparationtheyarestronglyperturbedbyjovianplasthathavelarrasses,lonrorbitalperiodsandnarrowerdynaicalseparationjovianplasarenotperturbedbyanyotherassivebodies

thepresentterrestrialplaarysysteisstillbegdisturbedbytheassivejovianplashowever,thewideseparationandutualteractionaongtheterrestrialplasrendersthedisturbanceeffective;thedegreeofdisturbancebyjovianplasiso(ej)(orderofagnitudeoftheeentricityofjupiter),scethedisturbancecaedbyjovianplasisaforcedoscillationhavganaplitudeofo(ej)heightengofeentricity,forexapleo(ej)&si;005,isfarfrosufficienttoprovokestabilitytheterrestrialplashavgsuchawideseparationas26rhthweassuthatthepresentwidedynaicalseparationaongterrestrialplas(≈gt;26rh)isprobablyoneoftheostsignificantnditionsforatagthestabilityoftheplaarysysteovera109-yrti-spanourdetailedanalysisoftherelationshipbeeendynaicaldistancebeeenplasandthestabilityti-scaleoflarsysteplaaryotionisnowon-gog

althoughournuricaltegrationsspanthelifetiofthelarsyste,thenuberoftegrationsisfarfrosufficienttofilltheitialphasespaceitisnecessarytoperfororeandorenuricaltegrationstonfirandexaedetailthelong-terstabilityofourplaarydynaics

‐‐以上文段引自ito,t≈tanikawa,klong-tertegrationsandstabilityofplaaryorbitsourlarsysteonnotrastronc336,483–500(2002)

这只是作者君参考的一篇文章,关于太阳系的稳定性。

还有其他论文,不过也都是英文的,相关课题的中文文献很少,那些论文下载一篇要九美元(《nature》真是暴利),作者君写这篇文章的时候已经回家,不在检测中心,所以没有数据库的使用权,下不起,就不贴上来了。

------------

第一百日(2)囤积粪便发家致富

唐跃坐在粪堆里,用剪刀剪开大便的真空包装,由于脱水和低温,袋中的粪便全部干燥而松脆,看上去坚硬,实际上轻轻一捣就会像沙子一样碎裂。

他长这么大也没想过自己此生会有幸与大便亲密接触,以往唐跃都是拉完提裤冲水走人,相当无情,从来不会回头看一眼。

唐跃把真空袋中的干燥粪便倒在铁盘子里,他甚至可以根据粪便中的食物残渣分辨出自己那天吃的是什么,许多富含粗纤维的食物在人的肠胃中得不到充分消化,会随着粪便一起排出来,唐跃有一阵子经常吃蔬菜罐头,那个时期的大便中就经常能看到未完全消化的植物纤维。

唐跃戴着两层口罩,好在这些大便都已经干燥了很长时间,没什么气味。

&ldo;粪便中的味道主要来自3-甲基吲哚,也就是粪臭素,这种东西如果沾在衣服上,那样你闻上去也会像一坨大便。

&rdo;老猫坐在边上帮忙,它一边捣碎粪便一边碎碎念。

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