直射波 的英文怎麼說
中文拼音 [zhíshèbō]
直射波
英文
direct wave-
The one - half wavelength out of phase caused by the specimen itself enables this light to cause destructive interference with the direct light when both arrive at the intermediate image plane at the diaphragm of the eyepiece
這種由標本產生的半個波長的相位差的光線與直射光同時到達位於目鏡光欄的中間像面時會產生相消的干涉。The notable torsion effects of the surface ground motion above the alluvial valley are illustrated and the torsion effects become stronger as the frequency of the incidence is higher. ( 4 ) antiplane surface motion of the underground circular soft inclusion and the underground homogeneous soft interlayer is investigated in this paper. the results indicate : surface displacement amplitudes just above the soft inclusion of small depth - to - width ratio is amplified and soft interlayer of small depth - to - thickness ratio is amplified to a certain degree, and moreover, the latter is lower limit of the former
結果表明:垂直入射時,小深寬比軟夾塞上方地表位移幅值有較大的放大,小深厚比軟夾層的地表位移幅值也有一定的放大,且後者為前者的下限;波接近掠入射時,軟夾塞正上方地表點和軟夾層的中國地震局工程力學研究所碩士學位論文一地表位移幅值都沒有放大,而軟夾塞迎波面一側地表點的位移幅值會有一定的放大;軟夾塞上方的地表位移運動有較強烈的扭轉效應,且此扭轉效應隨入射波頻率的增高而增強。Reflection will fall within a narrow wedge on the plot that is centered on its vertical axis.
反射波落在圖上以垂直軸為中心的一個狹窄的楔狀帶內。The multipath interference, resulted from interfering between the signals of the line of sight ( los ) and the line of ground reflection in vhf - rc, makes bit error rate of data transmission increased and system reliability attenuated
當前,中國水波中繼通道以直視路徑傳播為主,同時存在地面折射路徑對直射信號產生干涉,造成多徑干擾。這種干擾使得信號傳輸的誤碼率上升,系統可靠性下降。The results show that : 1 ) the effects of interface on waves scattering are stronger in the structure with the interface perpendicular to the direction of fracture normal than that in the structure with the interface parallel to the direction of fracture normal. 2 ) when the interface is perpendicular to the direction of fracture normal, the amplitude of reflected waves and converted s - waves are higher and there are the sub - p - and sub - s - wave. 3 ) when the elastic waves propagating in the multi - stripe model, wavesforms become complex due to multiple scattering on interfaces
研究結果表明: 1 )界面與裂縫排列方向平行時,界面對波的散射作用大於界面與裂縫排列方向垂直時的情況; 2 )當界面與裂縫排列方向平行時,在界面上產生的反射波及轉換的橫波幅度較大,並且有次級縱波和橫波產生; 3 )彈性波在多條紋結構中傳播時,在界面上產生多次散射使得波形十分復雜。The time lag between the direct wave and the scattered wave could be computed by using the simplex algorithm method
當彎曲波在傳遞時遇到平板裂縫則會產生散射波,因此含有裂縫平板的板波訊號即包括彎曲波的直接波傳與裂縫引起的散射波傳。Symmetries are existed in oxy and oyz planes for horizontally and vertically polarized waves, i. e. one ' s h - polarized case is the same as the other v - polarized one. while the expectations of the rotatory axes oriented in oxz plane are complement, one ' s h - polarized case is the same as the other v - polarized one
平面oxy和平面oyz對于兩種偏振極化入射波時存在著對稱性,一者的水平極化與另一者的垂直極化情況相同;而oxz平面內旋轉軸的平均取向的期望互余時,一者的水平極化與另一者的垂直極化時的情況相同。Abstract : the effects of airfoil geometric parameters on wing " s spacial and polarized scattering characteristics have been systematically revealed. the results of the study indicated that the calculating value of diffraction from trailing edge by using the formula of the straight wedge is very far from experimental results for vertical polarization, and the contribution of thickness of the trailing edge to scattering must be considered in the calculation. the scattering peak of leading edge depends only on radius of airfoil for horizontal polarization. but for vertical polarization, it depends on maximum thickness and the location of maximum thickness. engineering formulas for evaluating all scattering peaks were given in the paper. it is important for the design of low - rcs wing
文摘:系統地揭示了翼形幾何參數對機翼的空間散射特性、極化散射特性的影響規律.研究發現,在垂直極化狀態下用理論尖劈公式計算機翼后緣繞射的計算結果與實驗結果相差甚遠.提出在垂直極化狀態下機翼后緣繞射的計算必須將后緣厚度考慮在內的見解.對於水平極化,前緣散射波峰只與前緣半徑有關;而對於垂直極化,前緣散射波峰與翼形最大厚度以及最大厚度位置有關.給出前後緣散射波峰的工程估算公式,為低雷達散射截面( rcs )機翼設計提供依據The sun might blaze overhead, the air be without a breath, the surface smooth and blue, but still these great rollers would be running along all the external coast, thundering and thundering by day and night ; and i scarce believe there is one spot in the island where a man would be out of earshot of their noise
陽光直射下來,周圍沒有一絲兒風,蔚藍的海面上波平如鏡,但沿海岸邊卻仍是波濤滾滾,日夜喧嚷。我想整個島上是無處聽不到這種浪花飛濺的響聲的。The principle, theory, realizing methods for holographic lithography as well as the pattern transfer mechanism among the traditional photomask - hologram mask - resist have been deeply investigated. an experimental system with total inner reflection wavefront conjugation holographic lithography using right angle prism and refractive index matching liquid is designed and built, and the experimental research is carried out
對全息光刻的原理、理論、實現方法及傳統光掩模?全息掩模?抗蝕劑圖形傳遞機理進行了深入的研究,設計和建立了採用直角棱鏡和折射率匹配液的全內反射波前共軛全息光刻實驗系統,進行了實驗研究。This reflected blast wave, like the original (or direct) wave, is also capable of causing material damage.
反射爆震波像入射(或直達)波)一樣,也會對物質起破壞作用。Recommended practice for ultrasonic pulse - echo straight - beam tesing by the contact method
接觸式超聲縱波直射探傷方法Although direct waves are much stronger than scattering wavefields, the imaging of the underground anomaly is still well reconstructed from the reverse time process
即使利用含有非常明顯直接波信號的歷時記錄亦可有效的重建地下散射體的影像。This method has some characters : during recording of the transmissive holograms the holographic grating placed in front of the holographic plate closefittingly is used as a spectroscope. the transmissive wave is served as the object wave and the diffraction wave through the holographic grating or the deflective reflect wave produced by the silicon slice is served as the reference wave, therefore the hologram is named as self - reference image hologram. the recording results are the off - axis holograms and the twin images can be separated successfully
在記錄透射型全息圖時,將全息光柵緊貼置於記錄干板之前,而光柵起到了分光的作用,直透波作為全息圖的物光波,參考光是物光通過光柵后產生的衍射波;記錄反射型全息圖時將矽片置於記錄干板之後,利用反射矽片產生離軸參考光,因此系統僅需一束照明光束,參考光來自物光本身,因此稱之為自參考像全息圖。Basically, the cross - well seismic data processing has two steps : traveltime velocity inversion tomography for direct arrival and seismic reflection stack image
井間地震資料的處理主要包括兩個最基本的內容,即直達波旅行時速度反演層析成像和地震反射波疊加成像。The precondition for processing cross - well seismic data is that to perform the original data analysis thoroughly and determine the various waveforms and wave field as well as using the effective way to boost the direct arrival and reflection and suppress the disturbances and other noises
處理井間地震資料的前提是全面詳盡地分析原始資料,判別確認記錄上的各種波型與波場,採取有效手段突出直達波和反射波等有效波,壓制干擾波和噪音。In seismic prospecting, static correction is always cared by prospector and not resolved finally, especially for complicated - surface area. static correction influences on the reflection image and can lead to fault seismic interpretation and finally lead to dry - well. so it is very important and necessary for us to research
在地震勘探中,靜校正問題一直受到地震勘探工作者的特別關注,始終是注重解決而未能徹底解決的問題,特別是在復雜地表地區的地震勘探中;靜校正問題的存在,直接影響地震反射波的成像,致使地震剖面出現假構造,給解釋人員帶來錯誤的認識。With the increase of variance, the difference in h - polarized or v - polarized incident wave and in the different mean cross sections is becoming gradually small until when the variance is infinity namely the rotatory axes of the group are uniformly oriented : at this time the different mean cross sections are independent of the polarized status of incident wave
隨著方差的增大,入射波水平偏振和垂直偏振時的各平均截面的差異逐漸減小,減小到直至方差為無窮大時,即與粒子群取向的均勻分佈的情況相同,此時各平均截面與入射波的偏振狀態無關。Abstract : in this paper the characteristics of reflection waveform of embedded rock piles are studied from the point of theory and practice
文摘:從理論與實踐上對大直徑嵌巖樁的反射波形特徵進行分析研究。From the point of kinematics and dynamics, the author analyses the propagation rules of stress waves in concrete, namely time - space relations, wave amplitude attenuation, dispersion effect and characteristics of transmission of reflected waves and acoustic waves. combining with engineering practices, the author also concluded the main points of low strain detection of integrity of longdiameter underwater cast - in - situ piles, and pointed out that comprehensive and relational utilization of reflected waves method and acoustic wave transmission method can accurately evaluated the integrity of pile shaft and then improve the reliability of detection. 6figs., 3refs
從運動學和動力學角度,分析應力波在混凝土中的傳播規律:時空關系、波幅衰減、頻散作用以及反射波與聲波透射的特點,結合工程實踐,總結大直徑水下灌注樁低應變檢測的工作要點,指出綜合、合理運用反射波法與聲波透射法,可以較準確地評價樁身完整性,提高檢測結果的可靠性.圖6 ,參3分享友人