脈動星 的英文怎麼說
中文拼音 [màidòngxīng]
脈動星
英文
pulsating star-
As mentioned, mars has no continental drift like earth. this can be seen by the abscence of long mountain ranges on mars
我們提及過火星沒有類似地球的板塊運動,這點從火星表面欠缺山脈便可證明。Pulsating variables vary periodically, but for some stars, there may be sudden changes in their brightness. such kinds of stars are called eruptive variables. they include
:脈動變星的光度會周期性地改變,但有一些恆星的光度會在毫無先兆下變得光芒萬丈,這種恆星包括新星和超新星皆統稱為爆發變星。For example, if there is a planet orbiting around the neutron star, it will wobble a little and the pulses will come a little early or late. we can then deduce the mass and the radius of the orbit of the planet from the arrival time of the pulses. this is how the first extrasolar planet is discovered
例如假若有一顆行星圍繞一顆中子星運行,它會令中子星出現搖動,引致脈沖的間隔變長或短,由此我們根據脈沖周期的變化,可推斷出行星的質量和軌道半徑,這亦是天文學家找出第一顆地外行星時所用的方法。Double - mode pulsator
雙模脈動星Since the hydrogen - burning shell and helium - burning core do not produce energy in a stable and steady manner, the star will pulsate and generate strong stellar wind
由於這時燃燒氫和氦以產生能源的過程並不穩定,星體除了會不斷脈動外,更會產生強勁的恆星風把外殼吹掉。Their shells, which apart from hydrogen, helium, and carbon also contain portions of the heavy elements formed in the stellar core, are inherently unstable, and their pulsing creates a withering stellar wind a billion times stronger than the solar wind we know today
它的殼層除了氫層、氦曾和碳層外還有包含一部分產生自恆星核心的重元素,天生的不穩定,它們的脈動產生了一種毀滅性的星風,比我們現在知道的太陽風要強數百萬倍。To search for high - velocity molecular emission toward massive star formation regions, and to study the connections between h2o masers, iras objects and outflow properties, we carried out a co observation for a h2o maser sample. we found that most of the objects have excess high velocity emission produced by outflows ; we find a significant correlation between co line full widths and iras luminosities. the widths are proportional to the iras luminosities
通過在大質量恆星形成區搜尋高速分子輻射,並且研究它們與星際h _ 2o脈澤源和所聯系的紅外源之間的關系,我們發現絕大多數源都存在著氣體的高速運動並且它們是由分子外流產生的;我們同時發現在co分子的譜線全寬和所對應源的紅外光度之間存在很好的相關性,線寬隨紅外光度增加而變大。Besides acting as powerful signposts of active star formation, the intense maser emission provides a unique tool to probe the physical conditions and kinematics of these regions on scales of 10 - 103 au
星際脈澤不僅是恆星形成的一個及其重要的標志,而且也提供圍繞大質量恆星尺度10 - 10 ~ 3au分子氣體的物理條件和動力學結構的信息。He leant back against the hives, and with upturned face made observations on the stars, whose cold pulses were beating amid the black hollows above, in serene dissociation from these two wisps of human life
他仰身向後靠在蜂箱上,仰著臉觀察天上的星星,星星冷清的脈搏在頭頂上漆黑的夜空里搏動著,靜寂無聲,同人類生命中這兩個小生命相隔遙遠。Clinical research of stellate ganglion drug block combined with super laser to treat vertebral artery type cervical syndrome
星狀神經節藥物阻滯聯合超激光照射治療椎動脈型頸椎病的臨床研究Firstly, under the assumption that the output driving torque generated by the stepper motor of the mirror is constant, such influence analysis is conducted. secondly, a mathematic model of the stepper motor is given. under the assumtion that the input impulse frequence is constant, the rotational motion of the stepper motor of the mirror with the mutual exertions of damping torque, friction torque and disturbance torque generated by satellite platform ' s attitude motion is simulated and analyzed
對衛星平臺姿態振動對紅外相機掃描機構轉動的影響進行了系統深入的模擬分析:首先在步進電機驅動力矩一定條件下,模擬分析了星體姿態運動干擾力矩對紅外相機掃描鏡轉動的影響;接著建立了步進電機的數學模型,在步進電機輸入脈沖頻率一定條件下,模擬分析了步進電機在阻尼力矩、干摩擦力矩、平臺干擾力矩等負載轉矩的共同作用下的轉動情況。The antenna pointing control is open loop control without feedback. the antenna pointing errors due to antenna tracking motion and satellite attitude adjusting ( trusting ) were analyzed, as well as the influence of damping, tacking velocity and trusting time
文章分析了天線作跟蹤運動和星體作姿態調整時,對星體姿態控制精度和天線的指向精度影響,同時分析了阻尼、跟蹤速度、噴氣脈沖寬度等因素變化對動力耦合程度的影響。Tess s face and neck reflected the same warmth, which each gem turned into an aldebaran or a sirius - a constellation of white, red, and green flashes, that interchanged their hues with her every pulsation
苔絲的臉和脖子也染上了同樣的暖色調,她帶的寶石也變成了牛眼星和天狼星,變成了閃爍著白色紅色和藍色光芒的星座,隨著她的脈搏的跳動,它們就閃現出各種不同的顏色。In addition, a calculating method of parametrically designing hydraulic motor with non - circular planetary gear is proposed aiming at maximal unit displacement and the minimal pulsation ratio by means of visual c + + 6. 0 software
此外,探討了以單位體積排量最大為設計目標,流量脈動率最小為約束條件對非圓行星齒輪液壓馬達的參數化設計方法。Then, under the condition of satisfied the output volume request, a designing method of parametrically designing hydraulic motor with multi cylindrical gear is proposed aiming at minimal cubage with by means of visual c + + 6. 0 software, a calculating method of parametrically designing hydraulic motor with non - circular planetary gear is proposed aiming at maximal unit displacement and the minimal pulsation ratio by means of visual c + + 6. 0 software, and some designing method examples are provided for verifying the accuracy and possibility of those design methods
再次,在滿足排量要求條件下,以體積小為設計目標,利用visualc + + 6 . 0軟體對圓柱多齒輪式液壓馬達進行了參數化設計軟體的開發;另外,以單位體積排量最大為設計目標,以流量脈動率最小為約束條件,利用visualc + + 6 . 0軟體對具有圓柱行星齒輪的非圓行星齒輪液壓馬達的參數化設計軟體進行了開發。Pulsating variables are stars that are continuously expanding and contracting and therefore show variations in brightness
例如脈動變星就是恆星本身不斷膨脹收縮,造成光度亦出現相應的變化。Colliding black holes, collapsing stars, and spinning compact celestial objects such as pulsars create ripples in the fabric of space and time that subtly distort the world around us
黑洞碰撞、恆星坍縮以及自旋脈沖星所激起的時空結構波動,微妙的扭曲了我們周圍的世界。Gravitational waves are ripples in the fabric of space and time produced by events in our galaxy and throughout universe, such as black hole collisions, shockwaves from the cores of exploding supernovas, and rotating pulsars, neutron stars, and quark stars
引力波是時空結構的波動,由我們銀河系乃至整個宇宙中發生的事件,比如黑洞碰撞、超新星爆發時核心產生的激波以及旋轉的脈沖星、中子星和夸克星所產生。The satss is an antenna pointing servo system with ultra - low speed and high accuracy, driven by a rare earth permanent magnet ( repm ) brushless dc torque motor. to reduce torque ripple, the repm brushless dc torque motor has a slotless armature, and uses sinusoidal wave driven technology
衛星天線跟蹤伺服系統為超低速高精度天線指向控制系統,該系統使用稀土永磁式無刷直流力矩電機作為天線的驅動機構,為降低轉矩脈動,電機採用無槽電樞結構設計,並使用正弦波驅動方式。Biodiversity of bacterial isolates on three different media from coking wastewater treatment system
型行星傳動的星形布置的脈動式無級變速器運動特性的研究分享友人