查询词典 stars

The theory of accretion disks are important for many astrophysical phenomena, including Quasars, active galatic nucleic, X-ray binary stars, and young stellar objects. The most important branch of accretion djsk theory is the stability properties of djsks. It is widely considered that the luminosity variations of various astronomical objects are associated with the instability of accretion disk. The viscosity plays an important role in the accretion disk theory, and magnetic field exists commonly in astronomical phenomena. A more realistic analysis of the stabihty of the accretion disk should include both the radjal and azimuthal perturbations because of the strong shear of viscous flow.In this paper, according to the luminosity Variations of Various astronomical objects, we study the radial-azimuthal instability of an isothermal with magnetic field. We find that the radial and azimuthal fields B〓,B〓 are mainly responsible for enhancing the instability of the magneto-acoustic modes and non-axisymmetric modes,and that pulsational oscillations are larger in the radial than in the Z direction. The model may be useful in explaining the periodic light variation of FU orionis and. T Tauri stars.

在许多天体物理现象中，例如活动星系核，X-射线双星和年青的恒星理论中，吸积盘理论起着重要的作用，而吸积盘理论中的一个重要分支是吸积盘的不稳定性理论，普遍认为活动天体的周期，准周期光变现象与吸积盘的不稳定性有关，在吸积盘理论中，粘滞起着重要的作用，而磁场是天体物理中普遍存在的现象，对于几何薄吸积盘不稳定性分析，由于强剪切流的缘故，应该包括径向和环向扰动两个方面，本文结合天体物理中的各种周期，准周期光变现象，研究了含磁场的等温薄吸积盘的径向-环向振荡不稳定性，结果表明：磁场的径向和环向分量对磁声模和非轴对称模的不稳定性的增加起着主要的作用，且径向振荡大于轴向振荡，所得结果有利于解释FU Orionis和T Tauri Stars的周期光变现象。

We figure out the telescope mount parameters by observing stars with CCD, and establish a measurement system, including CCD and image acquisition card to collect stars'image data, time and frequency system (made up of high accuracy counter, the GPS second signal and 10MHz frequency standard), the observing software in VC++6.0 for collecting and processing star image and the image processing software programmed with MATLAB.

建立了一套用于测定望远镜机架指向误差模型参数的系统，包括：CCD 及图像卡等硬件系统用于采集恒星图像数据；使用高精度的计数器、GPS 提供的秒信号和标准10MHz信号开发了用于观测软件的时间频率系统；使用VC++6.0 编制了包括用于计算恒星位置及图像采集和处理的观测程序，并用MATLAB编制了用于处理观测数据的程序。

Light from ordinary stars and galaxies comes largely from atoms powered by thermonuclear reactions in the hearts of stars.

来自一般恒星和星系的光，主要是那些受恒星内部的热核反应所激发的原子发射出的。

Epik High《epilogue》《over》 You got so much to prove hopin' they approve The only thing that's true is all you ever do is do You're movin' shoe to shoe but you're not goin' you stop growin' the moment that you stay at the top The only way is to drop free-falin' down the stairs that you climbed up lined up to freely mount the air But you dare not airdrop tired up like a hairknot hikin' down without a chance of steppin' on a fair rock And so you stand still in a stand still Hands still buildin' castles on a sandhill Man chill is what your friends say but you're not hearin' what little men say Anyway Keep on goin' and taste the stars Keep on growin' and raise the bar You're livin life for the A's down to the Z's After the hill you've got a mountain to seize You are an overacheiver do what it takes till it takes everything you are You are an overacheiver do what it takes till it takes everything you are Who can tell Your living in an organized hell The mansion of your mind just an oversized cell The pressure everything is done to a measure In the sea of competition sunk like a treasure Like a feather fallin' slow spralin' to the floor Strung up like a broken violin to your course Opportunity is knockin' at your door but you never left a welcome mat (It doesn't matter anymore) Or anyhow but you're too late to turn back Fate pushin' you into the wall like a thumbtack Ain't no comebacks in this game of life Roll the dice again Roll it once never twice Keep on goin' and taste the stars keep on growin' and raise the bar You're livin' life for the A's down to the Z's After one drop you've got a fountain to seize You are an overacheiver do what it takes till it takes everything you are You are an overacheiver do what it takes till it takes everything you are You are an overacheiver do what it takes till it takes everything you are Want a break from the world but the world wanna break you The weight makes your backbone curl up and ache you You are an overacheiver do what it takes till it takes everything you are Want a break from the world but the world wanna break you The weight makes your backbone curl up and ache you

登录 |《跋》Epik高《在》你有如此多的证明 hopin '他们批准只有一件事，是真实的你满脑子都是做是什么你的鞋，准予鞋但你不是要你停止growin ''那一刻你呆在上面惟一的办法就是下降 free-falin"下楼梯，你爬了上去自由转会到山的空气但你不敢airdrop累了，就像一个hairknot "没机会 steppin的一个公平的岩石和你伫立于一个静止 buildin手依然在sandhill的城堡你的朋友是什么人寒意但是你不hearin'小男人说无论如何，味道传来的持续的星星继续growin '和酒吧你在生活的一个能Z的你已经得到了山之后，一座山要抓住你是一个overacheiver 做任何事，直到你是什么你是一个overacheiver 做任何事，直到你是什么谁能告诉你的生活在一个有组织的地狱大厦的头脑只是一个超大的细胞所有的压力，对测量在大海中沉没宝藏。像竞争像羽毛的慢spralin因为"到地板上像破碎悬挂的小提琴你的课程机会是knockin '来到你的门前但你从未离开过一个欢迎仪式。无论如何，但你还是太迟了回去"你pushin命运像个图钉墙不是在这场比赛复出的生活滚动骰子滚它又从不两次不断传来的味道和天上的星星继续growin '和酒吧你推荐的生活为一个能Z的你已经得到了一滴后一个喷泉扣押你是一个overacheiver 做任何事，直到你是什么你是一个overacheiver 做任何事，直到你是什么你是一个overacheiver 做任何事，直到你是什么想一下这个世界但是世界想要打破你让你的体重骨干蜷缩和疼痛你是一个overacheiver 做任何事，直到你是什么想一下这个世界但是世界想要打破你让你的体重骨干蜷缩和疼痛

Located near the Trapezium stars are stars still young enough to have disks of material encircling them.

猎户座四边形旁是仍然被尘埃环盘围绕的小星。

The bright central region is the home of the four heftiest stars in the nebula. The stars are called the Trapezium because they are arranged in a trapezoid pattern.

图中明亮的中心区域是星云中四颗成熟的恒星，他们组成了一个梯形，我们称之为猎户座四边形。

If you have ever gazed at the stars, you may have noticed a group of seven stars shaped like a big soup ladle--this is the Big Dipper in the Ursa Major constellation.

你或者曾在夜晚欣赏美丽的星空，注意到有七颗星组成的星座，形状像个大杓子似的，那就是大熊星座里的北斗七星。

Assembly Line of Stars -- The constellation Vulpecula is a veritable entire assembly line of newborn stars.

装配线星光-狐狸座的星座是一个名副其实的新生恒星的整个组装线。

I think that only the wellhead big blue sky at night, I like facing the wellhead few stars, up to count 20 different stars.

我认为，蓝天只有井口那么大，晚上，我喜欢对着井口数星星，最多能数出20颗不一样的星星。

Some day small stars the size of the sun will become white dwarf stars.

有一天，像太阳那么大的小星星会变成白矮星。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48