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wave front

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wave front 【物理學】波陣面，波前。

【物理學】波陣面，波前。 “wave“ 中文翻譯：   n. 1.波浪；碎浪； 〔the wave(s)〕 〔詩 ...“front“ 中文翻譯：   n. 1.前部，前面；正面；(劇場的)正面[前面]座位〔 ...“front wave“ 中文翻譯：   波陣面; 鋒面波“compression-wave front“ 中文翻譯：   壓縮波波前“compressional wave front“ 中文翻譯：   壓縮波波前“detonation wave front“ 中文翻譯：   爆轟波陣面“duration of wave front“ 中文翻譯：   波前持續時間; 波前寬度“duration of wave-front“ 中文翻譯：   波前寬度“front of the detonation wave“ 中文翻譯：   爆震波波前“front of wave test“ 中文翻譯：   波前沖擊試驗“front-of-wave test“ 中文翻譯：   脈沖波試驗“inclination of wave front“ 中文翻譯：   波前傾斜; 波前彎曲“law of the first wave front“ 中文翻譯：   第一波陣面定律“plane wave front“ 中文翻譯：   平面波前“pressure wave front“ 中文翻譯：   壓力波前“sharp-front wave“ 中文翻譯：   陡鋒波“shock wave front“ 中文翻譯：   沖擊波面; 沖擊波前沿; 沖擊波陣面“shock-wave front“ 中文翻譯：   沖擊波正面“spheric wave front“ 中文翻譯：   球面波前“spherical wave front“ 中文翻譯：   球面波前“steep wave front“ 中文翻譯：   陡波前沿; 陡峭波前“steep-front wave“ 中文翻譯：   陡前沿波; 前陡波“tension wave front“ 中文翻譯：   張力波前沿“upgoing wave front“ 中文翻譯：   上行波前“velocity of propagation of wave front“ 中文翻譯：   波前傳播速度

wave function

Generally , tidal bore is wave alignment moving upstream estuary , and its surface will break when the wave alignment is strong , which leads to water roll tracing the source . the velocity , which is between small - disturbed wave velocities before tidal bore happens and the one after tidal bore happens , increases with the ratio of tidal bore height to the water depth in wave front 涌潮一般是向河口上游推進的波列，強度大時，表面破碎，進而發展成溯源推進的水滾，其傳播速度隨涌潮高度與波前水深比值增加，大小介于涌潮前后小擾動波波速之間。

Wave off into shallow waters , seabed by the friction effect change steep wave front , trough ice , water points trajectory showed reciprocating flow , but also to the shore into the flow speed usually return rate greater than offshore , the net result of sediment at the bottom to the shore handling , and was the shock waves on the shore with the water current - riviera online accumulation 外海波浪傳入近岸淺水區，受到海底的摩擦作用，波鋒變陡、波谷變緩，水質點運動軌跡呈現往復流動，而且向岸進流速度通常大于離岸回流速度，導致底部泥沙凈向岸搬運，并被激岸浪的上沖水流帶至海濱線上堆積。

Differential equations for characteristic curves , velocity curves and slowness curves are given and the analytical expressions for wave fronts in orthotropic porous media are also obtained . the wave fronts in anisotropic fluid - saturated porous media are discussed in detail . in chapter 3 , the plane wave propagation in orthotropic fluid - saturated porous media is researched according to biot ' s theory and the concept of dynamic permeability 給出了正交各向異性液飽和多孔介質中彈性波的特征曲面，速度曲面以及慢曲面的微分方程，并給出了正交各向異性液飽和多孔介質中應力波波陣面的解析表達式，對不同含液飽和多孔介質中應力波傳播的波陣面進行了研究。

In chapter 2 and 3 , wave front solutions of the delay reaction - diffusion cui - lawson equation and the 2 - dimensional competitive lotka - volterra systems are obtained by constructing an upper solution and a lower solution of a second differential equation with delay . in chapter 4 , it is discussed that travelling wave solutions of the delay reaction - diffusion equations whose reaction term do not satisfy quasimonotonicity condition or weak quasimonotonicity condition 在第二章和第三章，利用一類二階時滯微分方程解的存在性理論，通過構造這類時滯微分方程的上、下解，分別研究了含時滯和擴散的cui - lawson方程和二維競爭型lotka - volterra系統，得到了它們波前解存在的充分條件。

Two transducers b and c , which record the time when the shock wave front arrives , are placed on both sides of location ( a ) with equal distance , the average shock wave speed at location ( a ) can be calculated from the distance b to c and the time that the shock wave needs to travel from b to c . all the tested signals are stored on a pint - sized system of independent function 同時測速測壓的方法是指在測取沖擊波壓力-時間曲線的同時，在被測點前后等距離處分別安裝壓力傳感器，記錄沖擊波上升前沿到達的時刻，通過時間差來獲取被測點處沖擊波的平均速度。所有的測試信號都被記錄在同一個小型的、能獨立工作的測試系統中。

It shows that when walk - off and diffraction effects could be ignored approximately estimation of the phase distribution of second - harmonic wave could be done . the far field divergent angle and second moment radius of harmonic wave will vary with the aberration of fundamental wave , but the far field divergent angle will be obviously smaller than that of fundamental wave . the phase distribution of both fundamental and harmonic wave is measured using hartmann - shack wave front sensor in the experiment with 1064nm and 790nm lasers , respectively 這說明利用非線性光學頻率變換方法拓寬波前傳感器件的響應波段是很難實現的，但是，通常三波相互作用過程的研究均是建立在平面波和理想高斯光束之上，因此我們對于位相畸變倍頻過程的研究是非線性光學領域一個重要而有意義的新課題，它有助于人們更加深入理解非線性光學效應，為進一步合理利用之奠定了理論和實驗的基礎。

The relationship between wave - front aberration and focal spot size was researched roundly , and the essential connection between focal spot energy shape and wave front gradient distribution was discovered , and a smarter parameter to evaluate wave front aberration was founded . based on this , the wave front aberration tolerance confined by focal spot size requirement was obtained through calculation and statistics method . 2 比較全面地分析了系統內部波前誤差與光束焦斑尺寸之間的關系，找到了波前梯度分布與焦斑能量分布之間的本質聯系，提出了一個與焦斑尺寸關系最密切的波前誤差參數，并采用數值模擬和統計的方法得到了焦斑尺寸限制條件所要求的波前誤差限制條件； 2

They pointed out that modulation wave fronts ( such as those in the front of a light pulse ) in a negative index material are aligned the same way as they are in a positive index material ? anything else would violate basic causality and require parts of the wave to travel with infinite velocity 他們指出在負折射率材料中調制波前（例如光脈沖前端的波前）的方向，與在正折射率材料中相同；若非如此，就會違反基本因果律，且部份波的前進速度將成為無限大。

At the present time , the first choice driver of icf is the laser . the basic requirements to the kdp crystal optics of icf solid laser driver are : high accuracy face shape quality ( transmission wave front / 6 pv ) , high laser damage threshold value ( 15j / cm2 ) , good surface roughness ( 5nm ) 慣性約束聚變固體激光驅動器對kdp晶體光學零件的基本要求是:高精度的面形質量(透射波前/ 6pv ) 、高激光損傷閾值( 15j / cm2 ) 、良好的表面粗糙度rms ( 5nm ) 。

It says that the stars indeed rotate at different speed , but the density of the interstellar medium form a wave . at the wave front , where the density is higher , star formation is enhanced . that is why we find young stars along the spiral arms and old stars elsewhere 這個理論認為雖然恒星會以不同速度移動，但星際物質的密度會產生波動，在密度最高的波陣面會催生出新的恒星，這解釋了為何通常在旋臂會找到新生恒星，而在其他地方只有古老恒星的原因。

At the case of excess of nonlinear effects appearance threshold , not only are quality reduction of the wave front passing optical elements and energy losses possible , but also the fatal destruction of optical elements in themselves are the most grievous 當泵浦光強度超過產生非線性效應的閾值時，激光通過諧波轉換晶體后，不但光束波前質量將有可能變差，而且還會損失一部分能量，更嚴重的是光學元件的致命破壞。

By the use of dynamic buckling supplementary restraint conditions at the compression wave front of cylindrical shells at the instant when the buckling occurs , the critical load and dynamic buckling modes of shells were calculated from the solutions of finite element characteristic equations 計算結果揭示了圓柱殼彈性軸對稱動力屈曲變形發展的機理，以及軸向應力波和屈曲變形的相互作用規律。

The effects of parallel aligned opening or water - filled fractures on waves propagation were investigated . the results shows that : 1 ) the existence of anisotropic properties of fractured rocks leads to waves conversion and the wave fronts become wider 通過模擬點源產生的彈性波在均勻各向同性各向異性巖石中的傳播，研究了平行排列裂縫的存在以及改變裂縫的參數對彈性波傳播特性的影響。

Abstract : numerically solving equations governing the variations of the beam size and the curvature of wave front in the logarithmically nonlinear media ( lnm ) , the propagating characteristics of gaussian beams have been described in detail 文摘:根據對數型非線性介質中高斯光束的束寬和波陣面曲率變化所滿足的耦合方程，采用數值計算對高斯光束的傳輸特性進行了詳細的分析。

The experimental result expresses that the frequency doubler - power amplifier sets of ka - band can supply good local oscillation source for “ millimeter - wave front - end of “ lmds “ “ . the model has the advantages of low cost , small size and high reliability 實驗結果表明，倍頻放大組件能夠為lmds毫米波前端提供很好的本振源，并且具有成本低、體積小、可靠性高等優點。

A new algorithm is then derived , in which the factor of spherical wave front is removed explicitly . thus the propagation of a focused beam could be evaluated indirectly from propagation of an unfocused beam 文中對此作了分析，進而提出了一種新算法，將球面波因子提出，然后將會聚光束的傳輸過程轉化為非會聚光束的傳輸過程，從而間接求得了聚焦光束的光場分布。

Reference lens , which can produce spherical wave front whose optical quality is better than / 20 by peak - valley value in wavelength , is an important part of “ 95 “ defense system project in measurement and testing 標準球面透鏡能產生峰谷值優于/ 20的球面波，是國防系統“九五”計量測試項目重要的研究內容之一。

In order to adjust the amplitude and width of the stress impulse in targets , the dependence of velocity and impactor thickness , as well as the flatness area of the wave front in targets are discussed 討論了靶中應力波幅度和寬度的調控方法、沖擊器的飛行速度與厚度的相關性、靶中應力波的平面范圍。

The dissertation is a part of “ millimeter - wave front - end of “ lmds “ “ , which is the beforehand researchful item of the electronic 10th institute of ministry of information industry 本論文所研究的課題是信息產業部電子十所預研項目“ ‘ lmds ’毫米波前端”的一部分。