useful beam 中文意思是什麼

useful beam 解釋
有效射束
  • useful : adj. 1. 有用的，有益的，有效的，有幫助的。2. 〈俚語〉值得稱贊的，精通…的 （at）。adv. -ly ,-ness n.
  • beam : n 1 梁，棟梁，桁條；（船的）橫梁。2 船幅；（動物、人的）體幅。3 （秤）桿，杠桿，（織機的）卷軸，...
  1. To research in the area of liquid helium cryopump used in nbi system is meaningful for obtaining better beam transportation efficiency. physical parameters and experience are obtained that are very useful in developing cryopumps

    開展中性束注入系統液氦低溫冷凝泵的研究，對獲得優良的束傳輸效率，具有非常重大的意義；並為以後相關應用領域中低溫冷凝泵的設計提供了性能參數和工程經驗。
  2. To research in the area of liquid helium cryopump used in nbi system is meaningful for obtaining better beam transportation efficiency. physical parameters and experience were obtained which is very useful in developing even larger cryopump

    開展中性束注入系統液氦低溫冷凝泵的相關研究，對獲得優良的束傳輸效率，具有積極的意義；並為以後開發更大抽速的低溫泵及相關應用積累了豐富的物理參數和經驗。
  3. In order to get an better control in horizontal displacement of tower top and the internal strength and displacement in beam, the theme take an circulating forth piece together means and get to a good target. the theme carry the theory through bsap program in design of the large highway bridge in anqing and prove the theory of the theme ' s useful and availability

    結合在安慶長江公路大橋的設計工作，論文採用了bsap系列程序有針對性的進行了實際應用，實際生產的使用表明了本文所採用理論與方法的有效性，為斜拉橋施工控制的模擬計算過程提供了一種參考與依據。
  4. Then an thorough computer modeling using finite element program with material, geometry and state triple - nonlinear taken into account is carried out on a series of influencing factors, such as comparison with npn - beam splice connection, comparison of varies designed theories, and the varying of fraction coefficient, diameter, grade, pretension and arrangement of bolts, thickness of web and flanges of beam and column, splicing location, axial loading on column, etc. lots of useful conclusions are drawn form computer modelling. finally, design and construction suggestions are given out. this study fills the black in the field of steel beam - to - column connection with cantilever beam high - strength bolted - splicing at both home and abroad

    然後，本文在考慮材料、幾何和狀態三重非線性的基礎上，對該連接形式進行了全面的計算機模擬，主要考慮了帶懸臂梁段全螺栓拼接的樑柱連接節點與無拼接的樑柱連接及翼緣對接焊接腹板拼接的連接節點的對比，各種設計方法之間的對比，以及翼緣拼接和腹板拼接的螺栓間距、直徑和數量，拼接點與梁端之間的距離，梁和柱的翼緣、腹板厚度，柱的軸力，接觸面的摩擦系數，翼緣和腹板拼接板的厚度等因素的影響。
  5. The following principles are proved : increasing cfp adhesive length will release the concentrating of shear stress near the cutoff point, this will lead to the increment of loading - bear capacity of concrete beams ; increasing the thickness of cfp will improve the transition of load from concrete beam to cfp, this is useful to exert the potential of cfp ; in creasing the anti - shear modulus of adhesive will result enhance the concentrating of shear stress, this is harmful to the effect of cfp reinforced concrete beams

    本文的理論分析結果可以表明：增加碳纖維板的粘結長度可以緩解碳纖維板端部界面上的剪應力集中，改善混凝土梁結構的加固效果；增大碳纖維板的粘結厚度可以增大界面上的剪應力，改善混凝土樑上載荷向碳纖維板的傳遞效果，有利於充分發揮碳纖維布的潛能；如果粘結膠層的抗剪模量過大會加劇剪應力的集中，從而對碳纖維加固的效果不利。
  6. Abstract : a general bpm simulator for optical waveguides is presented in this paper. this system includes three tools : the effective refractive index calculation tool, the waveguide mode solution tool, and the beam propagation method simulation tool. this system is very useful for the optimal design of the linear optical waveguide devices

    文摘:介紹了一個光波導器件計算機輔助分析系統，該系統集成了3個實用工具：光波導有效折射率計算工具，光波導模式求解工具和三維復折射率全矢量有限差分束傳播法模擬工具.本系統用於線性波導器件，模擬光在波導中的傳播過程，從而可以優化設計波導器件，探索新結構器件
  7. Mathematical and physical models for multi - beam and multiple - exposure techniques including single exposure with double - beam, double - exposure with double - beam, single exposure with tri - beam, double - exposure with tri - beam, four - beam and five - beam interference are established. simulation software is programmed, large numbers of computer simulation research have been carried out and a lot of useful results have been obtained

    建立了多光束、多曝光技術，包括雙光束單曝光、雙光束雙曝光、三光束單曝光、三光束雙曝光、四光束和五光束干涉的數學物理模型，編制了模擬軟體並進行了大量的計算模擬研究，得到很多有用的結果。
  8. The laser beam spot evolution and electron density in the guiding range are evaluated with the burn pattern and the measured conductivity. the above results will be useful in ultrashort laser pulse amplification and future research in ultrashort intense laser propagation in plasmas and ionizing gases

    以上研究結果對于超短脈沖激光放大技術研究以及超短超強脈沖激光在低密度等離子體和空氣中長距離傳輸和聚焦研究等具有重要的實用參考價值。
  9. The sharp acceleration turns the traveling electron wave into a plane wave, like a nice regular pulse of an electron beam with an extremely short wavelength ? exactly the kind of beam useful for imaging

    急遽的加速會讓行進中的電子波轉變為平面波，就像一道波長極短的電子束所形成的有規律脈沖，完全符合造影所需。
  10. A few practical cone - beam reconstruction algorithms, including feldkamp, cross - convolution method and cone - convolution method are analyzed. some useful conclusion is drawn by comparing and evaluating the reconstruction result which comes from actual projection data

    且對實際投影數據用這三種方法進行圖像重建，對這三種方法的重建結果進行比較、分析和評價得到一些有益的結論。
  11. This thesis discussed the design principia and desige method from the engineering point of view., and give out its own view about the selection of development of the hydropower station, layout of the underground cavern mass, selection of method for stability analysis on the surrounding rocks and support, and design of the rock anchorage crane beam. some conclusions assumed from the research and design of jiangkou power house is quite useful for all the underground hydropower station

    本文結合江口電站，從工程的角度對地下廠房的設計原則、設計重點進行了詳細論述，對電站開發方式的選擇，地下洞室群的布置特點，圍巖的穩定性分析及支護方式選擇以及巖錨吊車梁的設計方法進行了研究和論證。本文的觀點和結論對地下廠房工程設計有著一定的普遍意義。
  12. In a scientific statement to be published in the october 17 edition of circulation and released on - line on october 2nd ( http : / / circ. ahajournals. org / rapidaccess. shtml ), an american heart association writing committee concludes that electron beam computed tomography ( ebct ) is now established as a useful technique in identifying individuals with or at risk for coronary heart disease ( chd )

    10月2日在網上發表的一篇科學綜述將於10月17日在循環學雜志發表，美國心臟病協會著述委員會得出結論，電子束計算機斷層攝影術（ ebct ）已成為鑒別病人是否存在冠心病風險或診斷冠心病的一項非常有益的檢查技術。
  13. The diffraction efficiency of phase mask is discussed by using rigorous coupled - wave theory. the results are useful for fabrication of phase mask. and the diffraction efficiency of linearly chirped phase mask is discussed, it presents require of ion - beam etching

    利用嚴格耦合波理論對光纖光柵相位掩模的衍射效率問題進行了深入研究，以達到指導光纖光柵相位掩模實際製作的目的，並且研究了啁啾掩模的衍射效率問題，為線性啁啾光刻膠掩模的離子束刻蝕提出了要求。
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