Many planets ( for example, ganymede, mercury, the earth, jupiter and saturn ) and stars ( for example, the sun ) possess intrinsic magnetic fields. the explanation for their existence and variation remains a great challenge to planetary scientists and astrophysicists. this article attempts to review some recent developments and difficulties in the study of magnetohydrodynamics for the electrically conducting fluid interiors of planets and stars. it is the fluid motions, usually driven by thermal convection, that generate and sustain magnetic fields through magnetohydrodynamic processes in planets and stars. in planets, the magnetohydrodynamic processes are strongly affected by the combined and inseparable effects of rotation, magnetic fields and spherical geometry. the key dynamics involves the interaction between the coriolis and lorentz forces. in the sun, it is the solar tachocline, a thin shear flow layer located at the base of the convection envelope, that plays an essential role in the solar magnetohydrodynamic processes which produce the 11 - year sunspot cycle. some results of a new nonlinear three - dimensional solar dynamo model are also presented
許多行星(如木衛三,水星,地球,木星和土星)和恆星(如太陽)具有內部磁場.對這些磁場的存在和變化的解釋對行星科學家和天體物理學家是一個巨大的挑戰.本文試圖總結行星和恆星的導電流體內部磁流體力學研究的新近發展和困難.一般由
熱對流驅動的流動通過磁流體力學過程產生並維持在行星和恆星中的磁場.在行星中磁流體力學過程強烈地受到轉動,磁場和球幾何位型的綜合影響.其動力學的關鍵方面涉及科里奧利力和洛倫
茲力間的相互作用.在太陽中其流線,即處于對流層的薄的剪切流層在太陽的磁流體力學過程中扮演了一個基本的角色,並由之產生了11年的太陽黑子周期.本文也給出了一個新的非線性三維太陽發電機模型
The salon was filled with the works of modern artists ; there were landscapes by dupr, with their long reeds and tall trees, their lowing oxen and marvellous skies ; delacroix s arabian cavaliers, with their long white burnouses, their shining belts, their damasked arms, their horses, who tore each other with their teeth while their riders contended fiercely with their maces ; aquarelles of boulanger, representing n ? tre dame de paris with that vigor that makes the artist the rival of the poet ; there were paintings by diaz, who makes his flowers more beautiful than flowers, his suns more brilliant than the sun ; designs by decamp, as vividly colored as those of salvator rosa, but more poetic ; pastels by giraud and muller, representing children like angels and women with the features of a virgin ; sketches torn from the album of dauzats " travels in the east, " that had been made in a few seconds on the saddle of a camel, or beneath the dome of a mosque - in a word, all that modern art can give in exchange and as recompense for the art lost and gone with ages long since past
客廳里掛滿了近代畫家的作品,有杜佩雷的風景畫:長長的蘆葦和高大的樹木,哞哞叫的奶牛和明朗的天空有德拉克絡畫的阿拉伯騎俠:身穿白色的長袍,把著閃閃發光的腰帶,戴著鐵套的紋章,他們的馬用牙互相嘶咬,騎在馬上的人卻在用他們的狼子棒兇猛地格鬥拼殺布郎
熱的水彩畫,色彩極其動人,以致使畫家成了詩人的仇敵有邊亞
茲的油畫,他使他的花比真花還鮮艷,太陽比真的太陽還燦爛有德網的圖案畫,色彩象薩爾瓦多羅聯薩的畫一樣生動,但卻富於詩意有吉羅和米勒的粉筆畫,把小孩子畫得象天使安琪兒,把女人畫得象仙女般美貌有從多薩的東方之行畫冊上撕下來的速寫,那些速寫都是畫家在駝峰上或回教寺院的殿堂下只花了幾秒鐘的時間勾成的。
Diana, known for her charity work and tabloid celebrity, died in a paris car crash with her boyfriend, dodi fayed, on aug. 31, 1997
黛安娜生前
熱衷慈善事業,並一直是媒體
熱追的名人。 1997年8月31日,黛安娜王妃與男友多迪?法耶
茲在法國巴黎遭遇車禍身亡。
Barry ' s prolific historical paintings demonstrate his ambition to rival the painters of antiquity and the renaissance and to practise what the then president of the ra, sir joshua reynolds, always preached ? that history painting was the noblest form of art
他的眾多歷史性畫作都表明,他
熱望與古代以及文藝復興時期的畫家相抗衡,始終信奉歷史畫乃是最為尊貴的藝術形式,而這恰恰也是皇家美術學院當時的院長約書亞?雷諾
茲爵士所一直倡導的。
This proof following enterprise already through the authentication, and has set up a file in the dongguan 114 nets industry and commerce enterprise database, inquires the more detailed enterprise material, please dial the dongguan enterprise information desk 96060 ( artificially ) 9686810114 billion ( to be automatic ), this enterprise numbers for 50302
茲證明同濟
熱水設備有限公司已通過認證,並已在東莞114網工商企業數據庫中備案,查詢更詳細的企業資料,請撥東莞企業查詢臺96060 (人工) 9686810114 (自動) ,該企業編號為50302 。
The procedure to modify the sss code is as follow : at first the hom eos ( equation of state ) is replaced by the sesame eos, secondly the magnetic force is added to the momentum equation, the ohmic heating rate is added to the energy conservation equation
對sss程序改造過程大致如下:首先以sesame數據庫物態方程替換sss程序原有的物態方程;其次在動量守恆方程中加上洛侖
茲力項,在能量守恆方程中加上單位質量焦耳加
熱項,通過麥克斯韋方程推導出磁擴散方程。
The maerz pfr - kiln is an ideal aggregate to produce the high reactive lime
麥爾
茲併流蓄
熱式石灰窯是
Bob richards, the former pole - vault champion, shares a moving story about a skinny young boy who loved football with all his heart
撐桿跳的前世界冠軍鮑勃?理查
茲與大家分享了一個感人的故事,一個身材瘦小卻全心全意
熱愛足球的男孩的故事。
Our first organic - synthesis experiments in 1996, and much more extensive research by thomas mccollom of the woods hole oceanographic institution, demonstrate that f - t reactions can build molecules with 30 or more carbon atoms under some hydrothermal - vent conditions in less than a day
1996年我們完成第一個有機合成實驗,加上伍
茲赫爾海洋研究所的麥科洛姆所作的廣泛研究,兩者都顯示,在某種深海
熱泉情境中,相關化學反應在一天之內就可合成含30個碳原子以上的長鏈分子。
To protect himself, ruiz used to wear a bulletproof vest under his suit jacket, but the vest was bulky and hot
為了保護自己,儒
茲曾經在他的西裝外套下穿一件防彈背心,不過這個背心又大又
熱。
" disease is the bullet killing frogs, but climate change is pulling the trigger, " says alan pounds, an ecologist at the monteverde cloud forest preserve and tropical science center in costa rica
阿蘭?龐
茲是哥斯大黎加的蒙特沃德雲霧森林保護區和
熱帶科學中心的生態學家,他說: 「疾病是殺死蛙類的子彈,但扣動扳機的卻是氣候變化。 」
This proof following enterprise already through the authentication, and has set up a file in the dongguan 114 nets industry and commerce enterprise database, inquires the more detailed enterprise material, please dial the dongguan enterprise information desk 96060 ( artificially ) 9686810114 billion ( to be automatic ), this enterprise numbers for 11297
茲證明東莞市寶強五金
熱處理廠已通過認證,並已在東莞114網工商企業數據庫中備案,查詢更詳細的企業資料,請撥東莞企業查詢臺96060 (人工) 9686810114 (自動) ,該企業編號為11297 。
This proof following enterprise already through the authentication, and has set up a file in the dongguan 114 nets industry and commerce enterprise database, inquires the more detailed enterprise material, please dial the dongguan enterprise information desk 96060 ( artificially ) 9686810114 billion ( to be automatic ), this enterprise numbers for 11637
茲證明東莞樟木頭榮大五金模具
熱處理廠已通過認證,並已在東莞114網工商企業數據庫中備案,查詢更詳細的企業資料,請撥東莞企業查詢臺96060 (人工) 9686810114 (自動) ,該企業編號為11637 。
It proved the commencement of delirium : mr kenneth, as soon as he saw her, pronounced her dangerously ill ; she had a fever
這證實是
熱病的開始,肯尼
茲先生一看見她,就宣布她病勢危險,她在發燒。
Sound waves from the iceberg had a frequency of around 0. 5 hertz, too low to be heard by humans, but by playing them at higher speed the iceberg sounded like a swarm of bees or an orchestra warming up, the scientists said
據路透社11月24日報道,科學家表示,從這座冰山傳來的聲波頻率大約為0 . 5赫
茲,遠遠沒有達到人耳的聽力范圍。但科學家加速播放聲波錄音后發現,這座冰山能發出一種類似大群蜜蜂的嗡嗡聲或者管弦樂隊演奏前
熱身的聲音。
Former reds striker alan smith has paid tribute to united fans for accepting him so readily, despite his deep affiliation with rivals leeds united
前紅魔射手阿蘭?史密斯感謝紅魔球迷是那麼
熱愛他,盡管他來自他們的死敵利
茲聯。
The el paso office arrested several members of the acfo operating in the juarez / el paso area
伊。帕索地區的聯邦分支機構在糾阿熱茲和伊帕索地區逮捕了幾名阿曼多。福恩特期販毒集團集團的成員。