象散現象 的英文怎麼說

中文拼音 [xiàngsǎnxiànxiàng]
象散現象 英文
astigmatism
  • 散 : 散動詞1. （由聚集而分離） break up; disperse 2. （散布） distribute; disseminate; give out 3. （排除） dispel; let out
  • 現 : Ⅰ名詞1 （現在; 此刻） present; now; current; existing 2 （現款） cash; ready money Ⅱ副詞（臨時; ...
  • 現象 : appearance （of things）; phenomenon
  1. ( 3 ) to make trig - cluster constringed by acquiring other orthogonal base. the third problem brought on the birth of wavelet that has gone through about a hundred years

    （ 3 ）求得另外的正交基，使時于在三角族情形下的發散現象在此時不致發生。
  2. When the fibers broke, fiber ends were mangled and frayed.

    纖維斷裂時，纖維端部相互糾纏並有擦散現象。
  3. The new idea on studying the phenomenon of photic vacuum dispersion

    研究光的真空色散現象時的一個新觀點
  4. ( 2 ) the causation that the caustic phenomena of electromagnetic wave propagation in two - dimension concave reflectors occurs and the types of singularities in caustic fields are investigated, and the conclusion that there are two types of singularities ( fold and cusp ) in caustic fields in two - dimension concave reflectors is obtained ; by symplectic geometrical method, formulations of computing wave fields in and far away from caustic fields in two - dimension concave reflectors are deduced, and the results are plotted in pictures. ( 3 ) the cause of the caustic phenomena of electromagnetic wave propagation in three - dimension concave reflectors and the types of singularities in caustic fields is discussed, and the conclusion that there are three main types of singularities ( fold, cusp and swallowtail ) in caustic fields in three - dimension concave reflectors is obtained ; by symplectic geometrical method, the formulae of computing wave fields in and far away from caustic fields in three - dimension concave reflectors are deduced. particularly, the wave fields in ellipsoid concave reflector are computed, and the results displayed in special sections are given

    論文主要包括三個方面： （ 1 ）分析了凹面反射的焦散現象，給出了不同凹面反射的焦散圖； （ 2 ）分析了二維凹面反射波動場焦散現象產生的原因及焦散區奇性的種類，得出了二維凹面反射波動場焦散區奇性主要有折疊（ fold ）和尖點（ cusp ）兩種的結論，利用辛幾何方法構造了圓錐曲面反射波動場非焦散區和焦散區的通用計算公式，並給出了圓柱面、橢圓柱面及雙曲柱面反射的計算結果； （ 3 ）分析了三維凹面反射波動場焦散現象產生的原因及焦散區奇性的種類，得出了三維凹面反射波動場焦散區奇性主要有折疊（ fom 、尖點kusp和燕尾k ）三種的結論，提出了利用辛幾何方法計算三維凹面反射波動場非焦散區和焦散區的計算方法，並給出了三軸不等橢球體凹面反射波動場的計算結果剖面圖。
  5. The description of atmospheric dispersion phenomena remains quasi-empirical and statistical.

    大氣擴散現象的說明仍然是準經驗性的和統計性的。
  6. The following three parts are included : ( 1 ) the caustic phenomena of electromagnetic wave propagation in concave reflector is studied, and the pictures of caustic fields in different concave reflectors are displayed

    （三）深入討論了凹面反射波動場的焦散現象、焦散區的幾何結構與奇性的特點以及非焦散區、焦散區波動場的計算問題。
  7. Test methods for chromatic dispersion of optical fibers

    光學纖維色散現象的試驗方法
  8. Conventional optical phase retarders are mostly designed by birefringent material. the refractive indices depend on the wavelength so strongly that the retardation is close to wavelength, here we call this dependent relationship the birefringent dispersion of material. this is the reason why conventional optical phase retarders are mostly applied to a single wavelength but ca n ' t be used to varied wavelength, so they are inconvenient to handle

    常規的光相位延遲器是由雙折射材料製成的，由於材料的雙折射率同波長密切相關，使其產生的相位延遲量也同波長具有嚴格的一一對應關系（即材料的色散現象） ，因而常規相位延遲片多用於單一波長，不同波長之間使用不可兼顧，這在使用中帶來諸多的不便。
  9. When the source frequency increases, the dispersion and the attenuation of signals become great, but the resolution is better

    當聲源主頻增大時，波形頻散現象較嚴重，幅度衰減較大，但探測能力增強。
  10. The matlab language and c language were applied to simulate the fixed - point dsp arithmetic of equalizer algorithm. the simulation result indicated the diveragence phenomenon would happen to adfe ( adaptive decision feedback equalizer ) based on rls algorithm under the fixed - point finite - precision arithmetic

    採用matlab和c語言模擬均衡器定點dsp演算法的實現，模擬結果表明rls演算法的自適應判決反饋均衡器（ adfe ）在定點有限字長運算的情況下存在著發散現象。
  11. In this paper, we discuss fick law and the thermodynamics theory which can be used to describe diffusion phenoma, and find that the thermodynamics theory not only can be used to describe the contrary diffusions and other various diffusions, but also can be used to deduce fick law, so it has a wider range of application

    摘要本文討論了描述擴散現象的菲克定律與擴散的熱力學理論，指出擴散的熱力學理論可以描述包括逆擴散現象在內的眾多擴散現象，並可導出菲克定律，因而比菲克定律具有更廣泛的適用性。
  12. This thesis discusses maslov ' s method, wavelet transform and their applications to asymptotic evaluation of wave equations in high frequency fields. the method of solving wave equations in caustic domain by symplectic geometrical theory, and the method of simplifying two - dimension wave equations in slowly varying nonhomogeneous medium by wavelet - transform theory are proposed. the caustics phenomena of electromagnetic wave propagation in concave reflector, the singularities of caustics, and the method of computing wave fields in and far away from the caustics in concave reflector are also discussed

    本論文探討了maslov方法在波動方程高頻近似中的應用及焦散區的具體求解方法；討論了用小波變換化簡二維非均勻緩變介質條件下的波動方程；本文還討論了凹面反射的焦散現象、凹面反射焦散區的奇性種類，討論了二、三維凹面反射波動場非焦散區、焦散區的計算方法。
  13. In the several years to come, more and more colleges will offer female sociology and related courses, curruculum will become more comprehensive and specialized, the level of disciplinization will further increase, compilation of textbooks and teaching reference materials will feature greater cooperativeness, and development of the female sociology teaching network will arouse greater attention

    在今後的幾年中，開設女性社會學及相關課程的高校將不斷增加，課程的設置將出現綜合化和專題化的兩向發散現象，學科化程度進一步增強；教材和教學參考資料的編寫將更注重合作化和組織化運作，女性社會學教學網路的建設將得到更多的重視。
  14. Diffuse large cell lymphoma of the spleen with no evidence of disease dissemination was proven after tumor resection

    經探腹切除腫瘤，病理檢查確定?一彌漫性大細胞型淋巴瘤，且無明顯疾病擴散現象。
  15. It has been proven by instrumental analysis that metal oxides and salts disperse spontaneously to the pores and surface of zeolites at atomic level dispersion

    摘要金屬鹽和氧化物在分子篩孔穴中及內外表面自發形成原子水平的分散，這種自發分散現象已被多種現代儀器分析所證實，並在國內外得到廣泛認同。
  16. Firstly, the multiple modes and dispersion nature of ultrasonic lamb wave are investigated in theory. furthermore, optimization of excitation signal is performed experimentally with the four parameters : the transport mode, the center frequency, the amplitude and the number of the wave ’ s peak value

    本文首先從理論上分析lamb波的多模式和頻散現象，在理論基礎上結合實驗在傳播模式、中心頻率、信號幅值、波峰數等幾個方面對lamb波進行優化。
  17. It shows that when wave propagates along axis direction, the displacements of radial, axis direction and the change of electric field are coupling each other, and there is dispersing phenomenon, and the displacement of circle direction can figure out independently, it has not dispersing phenomenon

    發現當波沿著圓柱殼體軸向傳播時，物質的徑向運動軸向運動和電勢的變化相互耦合，伴有頻散現象但是扭轉運動可以獨立表示，並且同電場無關，無頻散現象。
  18. Finally, some important conclusions were drawn, that is, using distributed pzt transducers, ultrasonic guided waves are generated and received in a pipe. usually, there are many different modes of guided wave propagating in the pipe and these modes are generally dispersive, the specific exciting signal of a harming windowed toneburst with a central frequency of 70khz for decreasing the effect of dispersion was selected. and guided wave are generated using 16 distributed pzt transducers in a circumferential direction for suppressing flexural modes

    首先，對當前本課題研究領域的進展作出綜述，並簡要介紹與超聲導波技術相關的理論基礎；其次，建立了一套有效的實驗裝置，在此實驗裝置基礎上，重點研究了採用分散式pzt傳感器在管中激勵和接收特定模態超聲導波的方法：根據在管狀波導中傳播的超聲波具有頻散現象及多模態特徵，選擇具有單一頻率的特定信號激勵超聲導波，使其頻散最小；同時採用分散式傳感器抑制不同模態的波型。
  19. Since the cause of caustics phenomena is that the tangent plane of lagrange submanifold in caustic fields is perpendicular to the original physical space, we solve the high frequency asymptotic problem in a new mixed space by changing the projecting direction, then we get the high frequency asymptotic solutions of wave equations efficiently near and on the caustics

    由於出現焦散現象的原因在於lagrange子流形在該處的切平面與物理空間垂直，通過轉換適當的投影方向，然後將這個投影方向上得到的高頻近似解再變換回到原來的物理空間中，得到了在焦散附近適用的高頻近似解。
  20. 2. finite and infinite element coupling method applied in the paper can not only reflect the scattering phenomenon of waves, but also lessen the amount of calculation. it has significant advantage compared with pure finite element method

    L本文的有限元一無限元耦合分析方法，不僅可以較好地反映波在無限域介質中的能量彌散現象，同時大大減小了計算量，與單純的有限元法相比，具有顯著的優越性。
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