行星化學 的英文怎麼說
中文拼音 [hángxīnghuàxué]
行星化學
英文
extraterrestrial chemistry-
The extreme carbon stars, whose derived mass loss rates and optical depths are both very high, are more evolved than infrared carbon stars. these stars are expected to evolve into protoplanatary nebula soon
極端碳星是高度演化后的紅外碳星,它的質量損失率及光深都非常高,幾乎沒有其光學對應體,並將很快演化為前行星狀星雲。Across the rigid - flexible coupling dynamic analysis, we acquired the coupled effects between the three - dimensional attitude motion of the satellite and the flexible vibration of the antenna ' s supporting beam, and got the dynamic behaviors of the system. and we found the change pattern of the antenna ' s structure parameters, which decide the system ' s connatural characteristic and its dynamic response
通過對衛星?天線形成的剛柔耦合系統進行動力學分析,獲得了衛星的剛體運動與天線的彈性振動之間的耦合影響規律及其真實的動力學行為,得到了天線結構參數對衛星?天線系統的固有特性及其動力學響應的影響規律,為衛星姿態控制和天線結構優化設計奠定了基礎。Research on kinematics of prolate epicycloid planetary transmission and optimum replacing tooth profile by arc
長幅外擺線行星傳動運動學研究及齒廓圓弧優化替代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。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" this questions our understanding of how giant planets are formed and evolve, " said robert noyes, a senior physicist at the harvard - smithsonian center for astrophysics ( cfa )
"這向我們對于大行星是如何行成演化的理解提出了置疑. "羅伯特?諾伊斯說.他是哈佛-史密森納天體物理中心的一名資深物理學家The asteroids are the most important small bodies in the solarsystem, and they mainly lies in the two locations - a main belt between the mars ' s orbit and the jupiter ' s and the near - earth space. the most feature of the orbits of near - earth asteroids ( neas ) is that the semi - major axes of the orbits are nearly equal to that of the earth or the perihelia distances are approximate to or even less than the mean distance between the sun and the earth, thus they could move into inside of the earth ' s orbit, so that they might close approach or even colliside with the earth ( or other planets, such as the venus, the mars, etc. ). the characteristic brings about some difficulties in the numerical research during their orbital evolution, which leads to the failure of the normalization technique in the general removal impact singularities of celestial mechanics methods and the symplectic algorithm which is successfully applied to the investigation in quality. by comparing the computation effects of several common numerical methods ( including symplectic algorithm ), and considering the nature of the movement of the small bodies, the corresponding treatments are provided here to improve the reliability of the computation
小行星是太陽系最重要的一類小天體,主要分佈在兩個區域;火星和木星軌道之間的一條主帶和近地空間.近地小行星軌道的最大特點是其軌道半長徑與地球軌道半長徑相近,或近日距離接近甚至小於日地平均距離,其運動可深入到地球軌道的內部,這將導致該類小行星與地球(還有金星、火星等)十分靠近甚至發生碰撞.這一特徵給其軌道演化數值研究帶來一些困難,包括天體力學方法中一般消除碰撞奇點的正規化處理以及對定性研究十分成功的辛演算法都將在不同程度上失效.通過對幾種常用數值方法(包括辛演算法)計算效果的比較,根據小天體運動自身的特性,給出了相應處理措施,從而可提高計算結果的可靠性Topics include : planets, planet formation ; stars, the sun, " normal " stars, star formation ; stellar evolution, supernovae, compact objects ( white dwarfs, neutron stars, and black holes ), plusars, binary x - ray sources ; star clusters, globular and open clusters ; interstellar medium, gas, dust, magnetic fields, cosmic rays ; distance ladder ; galaxies, normal and active galaxies, jets ; gravitational lensing ; large scaling structure ; newtonian cosmology, dynamical expansion and thermal history of the universe ; cosmic microwave background radiation ; big - bang nucleosynthesis
課程的主題包含了:行星、行星形成;恆星、太陽、正常的恆星、恆星形成;恆星演化、超新星、緻密天體(白矮星、中子星及黑洞) 、波霎、雙x -射線源;星團、球狀及疏散星團;星際介質、氣體、塵埃、磁場、宇宙射線;距離階梯;星系、正常及活躍星系、噴流;重力透鏡;大尺度結構;牛頓宇宙學、宇宙的動力膨脹及溫度發展歷史;宇宙背景微波輻射;大霹靂核合成。Abstract : in this paper, the lightcraft vehicle without on - board chemical fuel was analyzed sending manned craft into space on satellite laser - beams powered by solar energy in next age was speculated
文摘:分析了勿需化學燃料的光動力飛行器,並概述了下個世紀從衛星上用太陽光泵浦的激光束推進星際飛行器的設想。The phenomena under investigation are often vexingly complex, and they engage a large array of scientific disciplines : geology, geophysics, geochemistry, geobiology, physical and chemical oceanography, meteorology, atmospheric chemistry, and planetary science
我們所調查研究的現象通常十分的復雜,因此需要眾多學科專業知識的配合:地質學、地球物理學、地球化學、地球生物學、海洋物理學與海洋化學、氣象學、大氣化學和行星科學等。Study on the determination and electrochemical behavior of ciprofloxacin by polarography
環丙沙星的極譜測定及電化學行為研究We might therefore retrace the tectono - magmatic evolutionary history of orogenic belts in the light of characteristics of volcanic magmatism at different forming and evolutionary stages of orogenic belts and further explore some important scientific problems of global dynamics and comparative planetary dynamics by means of comparison on larger scales
因此,可以根據造山帶形成、演化不同階段火山巖漿作用的特點來重溯造山帶的構造巖漿演化歷史,進而從更大尺度上加以對比,探索全球動力學乃至比較行星動力學等重大科學問題。We might retrace the history of tectono - magmatic evolution of volcanic magmatism at different stages of formation - evolution of orogenic belts and further explore some important scientific problems of global dynamics and comparative planetary dynamics by means of comparison in larger scales
因此,我們可以根據造山帶形成演化不同階段火山巖漿作用的特點來重溯造山帶的構造-巖漿演化歷史,並進而從更大尺度上加以對比,探索全球動力學乃至比較行星動力學等重大科學問題。2 ) some rules and approaches for kinematics and dynamics analysis of transplanting mechanism with planetary elliptic gears were brought forward. following these rules and approaches, the mechanism analysis working would be simplified and some errors would be avoided
2 )提出了對橢圓齒輪行星系分插機構這種復雜機構進行運動學和動力學分析必須遵循的一些規則和方法,使復雜問題得以簡化,避免出現各種錯誤。Tissue sections from every animal were double - labeled with the antibodies of map - 2, cox - 2, gdnf, caspase - 3 and either the neuron - specific antibody neuronal nuclear protein ( neun ) or the astroglial - specific marker glial fibrillary acidic protein ( gfap ). we carried out a series of research to explore the effects and mechanism of map - 2, cox - 2, gdnf, caspase - 3 during tbi and trie d to provide some useful theory basis for both the treatment of tbi in the practice and forensic medicine
並通過上述指標分別與神經元特異性標志物神經元核蛋白( neuronalnuclearprotein , neun )和星形膠質細胞特異標志物膠質纖維酸性蛋白( glialfibrillaryacidicprotein , gfap )進行免疫組織化學雙染色,探討腦損傷后神經元及神經膠質細胞反應性變化情況及其分子生物學機制,以期為腦損傷研究提供有益的數據材料,也為以上指標在法醫學實際檢案的應用提供必需理論依據。In deep space exploration missions, autonomous navigation technology is very important, and in this paper, we do some research into the autonomous navigation schemes of encountering small celestial bodies. it is mainly described as the follows : firstly, by analyzing the orbit characteristics and task requirements in encounter, the simplified orbit dynamic model for the deep space probe is built up, and whether the corresponding model error that meets the demanding of autonomous navigation task is validated
在深空探測任務中,自主導航技術是十分重要的,本文對交會小行星的自主導航方法進行研究,主要內容包括:首先,分析交會小行星的軌道特性及任務需求,建立簡化的深空探測器軌道動力學模型,並驗證了簡化模型的誤差能否滿足自主導航任務的需求。Astar group is one of the special chemicals company specialized in composite materials, ( silicone ) rubber industry, timber industry, pu industry, adhesives and so on
愉星企業是一家特殊的化學品公司,主要致力於復合材料行業,橡膠及硅橡膠行業,裝飾材料行業, pu ,膠粘劑行業等領域的產品市場開發。There are numerous additional physical variations in planetary life, but all of these differences are wholly matters of anatomical modification, physiologic differentiation, and electrochemical adjustment
在行星生命中有無數另外的物質變化,只是所有這些差別完全是解剖學、生理學差異和電化學調整修正。The aim of this research was to study the dynamics characteristics of the mechanism with planetary elliptic gears, establish the optimized models and obtain the optimal parameters of this type mechanism. the contents and results of the research were listed as follows
本文的研究目的是以橢圓齒輪行星輪系分插機構為主要研究對象,分析其動力學特性,建立動力學模型並驗證,最後建立動力學優化模型並找出最佳參數。All such comparative estimates concerning the intellectual progress or the spiritual attainments of any world or group of worlds should in fairness recognize planetary age ; much, very much, depends on age, the help of the biologic uplifters, and the subsequent missions of the various orders of the divine sons
所有這一類比較涉及智力的進化或者任何世界或世界組的靈性成就就是清晰看待行星的年齡;許多,許多,取決于年齡,取決于生物學提升的幫助和隨后各種秩序神的兒子使命幫助。分享友人