譜線天文 的英文怎麼說
中文拼音 [pǔxiàntiānwén]
譜線天文
英文
ray line astronomy-
A serious problem in astronomical spectroscopy is imposed by the absorption of light in the earth's atmosphere.
地球的大氣層對光線的吸收，給天文光譜學帶來了嚴重的問題。In this paper, the finite - element numerical analysis calculation is applied to the foundation of high - rise and multi - floor building and the evolvement law of stress and displacement of tunnel used by urban traffic to explore the mutual influence between the wall rock of underground space and high - rise building foundation, taking account of the specific construction situation in the " sanmu garden " project in dadukou district in chongqing, from the perspective of underground space static - force structure stability analysis to open a underground tunnel with 6m in span and 7. 5m in height for track traffic 20m below the surface. this paper, taking considerations of three different states, i. e. the natural state without any artificial interference, the state of high - rise buildings on the surface, and the underground tunnel state with excavation for track traffic, and four plane lines and four vertical lines, analyzes and studies the distributing law of stress and displacement of calculation section from the following aspects : ( 1 ) the main stress vectorgraph, displacement distribution graph ( ux, uy ) and chromatogram graph of stress isoline ( 1, 2, xy ) of section under different states ; ( 2 ) the contrastive distribution curve of stress ( 1, 2, xy ) of different plane and vertical lines under the same state ; ( 3 ) the contrastive distribution curve of stress ( 1, 2, xy ) of the same plane and vertical lines under different states, wishing to provide references for underground space utilization and project designing and construction of the tunnel under high - rise buildings in the future
本文結合重慶市大渡口區「三木花園」開發建設項目，從地下空間靜力結構穩定性分析角度出發，針對在該項目中涉及的高層和多層建築物以及在其地下20米處開挖了一個用於軌道交通的跨度6米，高7 . 5米的地下隧道這一具體工程情況，採用2d - 3d -有限元結構分析程序對高層與多層建築物的地基基礎及其與城市軌道交通使用的地下隧道圍巖的應力與位移演變規律進行了有限元數值分析計算，探索了地下空間圍巖與高層或多層建築物地基基礎之間的相互影響，通過考慮未受到任何人為擾動影響的天然狀態、地表存在多層或高層建築物狀態和地下開挖用於軌道交通的地下隧道狀態等三種不同狀態以及4個水平剖線和4個垂直剖線等不同情況，從以下幾個方面具體分析研究了計算斷面的應力與位移分佈規律： （ 1 ）在各種不同狀態下計算斷面的主應力矢量圖、位移分布圖（ ux 、 uy ）以及應力等值線色譜圖（ _ 1 、 _ 2 、 _ （ xy ） ）等； （ 2 ）相同狀態下不同水平與垂直剖線的應力_ 1 、 _ 2和_ （ xy ）對比分佈曲線； （ 3 ）不同狀態下相同水平或垂直剖線的應力_ 1 、 _ 2和_ （ xy ）的對比分佈曲線等，為今後在對地下空間的開發利用以及在高層建築物地下開挖硐室時的工程設計和工程施工提供參考依據。Astronomers found the halo using nasa ' s far ultraviolet spectroscopic explorer ( fuse ) satellite to peer beyond the edges of our home galaxy
天文學家是使用美國航空航天局的遠紫外線光譜探測儀（ fuse ）衛星，在我們所居住的星系邊緣外發現此日冕的。This dissertation is focused on the study of adaptive digital beam forming ( dbf ), two - dim spectrum estimation and the determination of the highness of the object. main work include : 1 a method of adaptive dbf in received antenna array
本文圍繞著自適應接收波束形成、時-空二維譜估計和對目標高度判定等方面進行研究，主要研究工作包括以下幾個方面： 1討論了在接收陣列天線中，自適應數字波束形成（ dbf ）的方法，引入了采樣梯度矩陣演算法。Based on the viewpoint of interaction between waves in plasmas, the partial differential equation that causes the spectral lines broadening has been deduced from radiation transfer equation of high - frequency electromagnetic waves in plasmas. the numerical solution has been obtained by using the fortran program we compiled. we concretely calculated the spectral lines widths of and fraunhoferx 3704 in corona, fj / a4923. 9 in dwarf nova oy car and f. / a4934 in the variable star rr lyrae
本文從等離子體波與波相互作用觀點出發，由高頻電磁波輻射轉移方程導出了引起譜線寬度變化的偏微分方程，編寫fortran程序求解偏微分方程的數值解，具體計算了日冕綠線f _ exiv 5303和夫朗禾費線3704 、矮新星oycarf _ eii 4923 . 9 、天琴rr型變星f _ ei 4934的譜線加寬值，對以上各譜線加寬中的等離子體致寬效應作了初步計算。In astronomical situations, the natural line width is seldom directly observed.
在天文學研究中，譜線固有寬度很少能直接觀測到。In the second chapter, a wideband mimo channel model with multiple - tap was integrated according to the angle of departure of the transmitting signal and its spread angle, the angle of arrival of the receiving signal and its spread angle, power azimuth spectra, doppler spectrum and the geometric construction of antenna array both sides of transmit and receive, on the basis of full research on the theories of space - time channel model proposed in the recent literature
第二章在對最近文獻中提出的一些空時通道模型理論進行詳細研究的基礎上，根據發射信號的離開角及其擴展角、接收信號的到達角及其擴展角、功率方位譜、多普勒譜和收發兩端天線的拓撲結構，綜合了一個多抽頭的寬帶mimo通道模型。To deal with the echo information from doppler weather radar, in this paper we recommend the processing of some radar products ( cr, vcs, cappi, vil, wer, vwp ), according to the research of nim on weather radar, referred to other advanced algorithm of radar products from home and abroad and combined with the requirement of application in our country. these products are produced on the platform of windows 98 or windows 2000 by the use of visual c + +
為了對多普勒天氣雷達的回波信息（包括強度、徑向速度和速度譜寬）進行加工、計算和處理，本文根據南京氣象學院在天氣雷達方面的長期研究積累，同時借鑒其他國內外先進的天氣雷達產品的演算法，結合我國氣象業務應用的要求，對多普勒天氣雷達的氣象產品（組合反射率因子、任意垂直剖面、等高平面位置顯示、垂直累積含水量、弱回波區顯示、 vad垂直風廓線等）進行工程化設計。Ray line astronomy
譜線天文The sub - arcsecond spatial resolution of chandra, and xmm - newton s unrivaled sensitivity open a new area for the study of nearby galaxies ; many x - ray point sources are resolved without confusion and astronomers can study their x - ray properties such as timing behaviors and spectra in details
錢德拉射線天文臺具備低於一角秒的解析度，而xmm -牛頓衛星的靈敏度更是無出其右，二者天衣無縫的配合，為研究這些天體的射線特性，例如光度變化和光譜等，開創一個全新的領域。A wide range of application is possiblerfrom biomedical and industrial imaging to radiation monitoring and control due to their well - known capability to operate at room temperature with minor degradation of spectroscopic performance
在室溫下對x -射線、 -射線能量解析度好，其能量探測范圍在10kev ? 6mev 。可應用於天文、醫學、工業、軍事等領域的各種探測器和譜儀。A comparative study on the forming process of exfoliated graphite and graphite oxide prepared from both natural graphite and expandable graphite is accomplished with xrd, ftir and tg techniques
本文以天然石墨、可膨脹石墨為原料分別合成了膨脹石墨及氧化石墨，並利用x射線衍射、紅外光譜及熱分析等手段對其進行結構研究。If you have knowledge in simple image processing, you may reduce the noise further by taking many exposure on the same object, and stack them together in computer. after gaining some experience, you many want to take close - up photos of clusters and nebula. since the magnifying and light collecting power of the camera lens is not enough, you have to connect the camera to a telescope
在1868年，法國天文學家pierre janssen發現了在太陽的光譜中，有一條奇怪的光譜線，起初科學家以為這是一種地球上並不存在的物質所造成的，所以把這種新物質命名為氦英文為helium ，這個字來自希臘語的helio ，意思即為太陽。Stars are classified by their spectral lines well before we know that those lines are also related to the temperature. the classes of spectral lines are called the
早在科學家了解顏色和溫度的關系之前，天文學家早已根據光譜的吸收線把恆星分類，這種分類方式稱為分享友人