propagation conditions 中文意思是什麼

Under conditions of easterly flow, therefore, or very large westerly flow no vertical propagation will occur.

所以在東向氣流或很大的西向氣流的情況下，將不發生垂直傳播。

The propagation of stress waves in solids can be considered as a part of the field of acoustics or ultrasonics depending on the conditions.

應力波在固體中的傳播，根據其條件可視為聲場或超聲場的一部分。

An epidemic model of friendly worm counter - attacking network worm is proposed based on two - factor model, with the conditions that the machine number of the network is fixed during propagation

這對于基於主動擴散的良性蠕蟲主動對抗惡性蠕蟲具有一定的指導意義。其次，研究基於ascm模型的良性蠕蟲主動擴散演算法。

It has been shown that the complex sites have important effect on seismic wave propagation. moreover, specialists concluded from field investigation that intensity anormaly during destructive earthquakes is in accordance with local site conditions

復雜場地對地震波傳播有很重要的影響，地震現場調查顯示，地震烈度異常區與場地條件密切相關。

( 2 ) based on the propagation equation of fgbs passing through unapertured paraxial abcd optical systems, the similar transformation conditions are obtained for the first time, which is expressed as that two fgbs with the same beam order have similar intensity distributions at the two positions of equal generalized fresnel number when they propagate through two ajb, cjdi ( i = l, 2 ) systems. furthermore, a comparison between a fob and a sgb of the same beam a ^ - factor but different waist widths is performed for the first time

（ 2 ）通過對作為整體的平頂高斯光束在無光闌限制近軸abcd光學系統中傳輸公式的分析，首次得到了平頂高斯光束的相似變換條件，即階數相同的平頂高斯光束在傳輸矩陣為a _ ib _ ic _ id _ i （ i = 1 ， 2 ）的兩個光學系統中傳輸時，在菲涅爾數相等的兩個面上具有相似的光強分佈。

The propagation and control of soliton in nonlinear kerr optical lattice with harmonic modulation of refractive index are investigated analytically and numerically in this paper. and some innovative research results have been worked out. the forming conditions of lattice soliton from gauss beam and the two modes of its stable propagation are obtained for the first time

本文利用解析和數值方法研究了在具有橫向折射率周期性調制的克爾型非線性光學格子中孤子的傳輸和控制，做出了一些創新性的研究結果:首次得出了高斯光束形成格子孤子的條件和兩種穩定傳輸形式。

Tests on electrical and optical cables under fire conditions - test for a vertical flame propagation for a single insulated wire or cable - apparatus

著火條件下電纜和光纜的試驗.單根絕緣電線或電纜的垂直火焰蔓延的試驗.裝置

Tests on electric and optical fibre cables under fire conditions - part 1 - 3 : test for vertical flame propagation for a single insulated wire or cable - procedure for determination of flaming droplets particles

著火條件下電纜和光纜的試驗.第1 - 3部分:單根絕緣電線或電纜垂直火焰蔓延的試驗.火焰熔滴顆粒測定規程

The research shows that students misunderstand the relation between force and motion. gravity and action / reaction ; that in dc circuit, students of different age groups have the belief of " consumption of current ", " clashing currents " and " the battery as a constant current generator " ; that in understanding the concepts of electricity students lack th e knowledge of relating the micro with the macro ; and that students have serious difficulties in understanding the propagation of mechanics wave, the speed of wave and superposition, and do not make a distinction between the initial conditions and the medium properties of the system

具體表現在：學生對力和運動的關系、重力和平衡、作用力與反作用力存在一些誤解；對直流電路，不同年齡的學生不同程度地存在電流消耗、碰撞電流、恆定電流源等觀念，而且對電學概念的理解缺乏宏觀與微觀的聯系；學生在機械波的傳播、波速、波的疊加上存在嚴重的困難，對于機械波的傳播學生不能區分初始條件和媒質特性，並錯誤地將動力學某些觀念與機械波進行類比。

Study on the suitable conditions for shoot propagation and rhizogenesis of robinia pseudoacacia cv idaho

香花槐試管苗的繼代培養和生根移栽條件研究

Diseases spread by insects are encouraged when climatic conditions are favorite to the propagation of the vectors.

當氣候條件適于媒介昆蟲繁殖時，由昆蟲傳播的疾病即行蔓延。

The conditions for the long distance propagation are discussed in detail. the results are useful in determining the appropriate size of the channel to be preformed and can guide the future research in ultrashort intense laser propagation

首次利用自恰電子空腔效應分析了超短超強激光在低密度等離子體中的長距離傳輸和自聚焦效應，詳細分析了長距離傳輸的條件。

Abstract : based on two order approximation of the variation of refraction index produced by self - action while optical pulses are traveling in kerr - medium, the propagation equation has been solved. furthermore, the strict analytical expressions of the amplitude, width and chirp parameter of chirped gaussian pulse, relative to the propagation distance, are deduced. the solitary wave traveling conditions of fundamental mode gaussian pulse have been discussed

文摘:將光脈沖在克爾介質中自作用產生的折射率變化作二階近似，求解所得到的傳播方程，得到啁啾高斯脈沖幅度，脈沖寬度和周啾參數隨傳播距離變化的嚴格解析解，討論了基模高斯脈沖孤波傳播的條件。

Using the variational method, analytical conditions for stationary pulse propagation in dense period fibers with strong dispersion management are deduced. the expression of initial soliton peak power is given. by employing the obtained formulas, the soliton evolution semi - analytically in various dispersion maps can be investigated. effects of the third order dispersion are also studied in this paper. the results show that imperfect dispersion slope compensation can cause pulse central position shift and even serious degradation of soliton shape

利用變分方法，推導出了在強色散管理的密集周期光纖中脈沖穩態傳輸的解析條件，並給出了初始脈沖峰值功率的表達式.運用這些公式，對各種色散管理系統中孤子的演化進行了半解析的考察.三階色散也被考慮在內.結果表明:不完善的色散斜率補償將導致脈沖中心位置的偏移甚至嚴重的孤子形狀劣化

Based on the resolving algorithm of continuous - layer method, the time order analyzing curves, acceleration curves and the response spectra of transfer function at the different points of the ground and at the same point on the different ground conditions are gained. it demonstrates that the responses of ground in x, y and z axial directions all change by time, and the obvious wave propagation appears in ground. for different observing points on the same ground condition, at more distant points from the load line, the less swings are found, that is to say, vibration possesses the obvious characteristic of attenuation

基於分層法的解析演算法，得到了在不同點以及在同一點但不同地質條件下的時程分析曲線、加速度變化曲線和傳遞函數反應譜，結果表明，地基土在x 、 y 、 z三個方向的響應都是隨時間變化的，並且伴隨有明顯的波動現象產生；對于相同地質條件的不同觀察點，距離荷載作用線越遠的地方振幅越小，即振動具有明顯的衰減性。

Using the theories of probability, algebra and number theory comprehensively, we investigate a class of boolean functions with three - valued walsh spectrum in the first part of this dissertation : the properties of the extended semi - bent functions, which are constructed from any two bent functions, are studied, followed by the structure characteristics of the boolean functions satisfying propagation criterion with respect to all but two vectors ; the definition and cryptographic properties of k - order quasi - bent functions are proposed whose walsh spectrum takes on only three values. some sufficient and necessary conditions are offered to decide whether a boolean function is a k - order quasi - bent function ; a special method is presented to construct the k - order quasi - bent functions, whose cryptographic properties are explored by the matrix method, which is different from the method of walsh spectrum and that of autocorrelation of boolean functions ; the application of this kind of boolean functions in the fields of stream cipher, communications and block ciphers is discussed, which shows the great importance of the fc - order quasi - bent functions ; some methodology are proposed to construct the k - order quasi - bent functions, including the complete construction by using the characteristic matrices of boolean functions, and the recursive method by two known k - order quasi - bent functions we further extend our investigation to the ring zp, where p is a prime, and the similar results are presented as far as the p - valued quasi - generalized - bent functions are considered

本文首先綜合運用概率論、代數學、數論等基礎學科的理論知識，並以頻譜理論作為主要研究工具，對一類譜值分佈相對均勻的函數? ?廣半bent函數、 k階擬bent函數和p值k階擬廣義bent函數進行了系統、深入的研究，給出了廣半bent函數定義，並探討了廣半bent函數的密碼學性質；給出了k階擬bent函數和p值k階擬廣義bent函數的定義及等價判別條件；討論了k階擬bent函數和p值k階擬廣義bent函數與部分bent函數和p值廣義部分bent函數的關系，探討了它們的密碼學性質；給出了k階擬bent函數和p值k階擬廣義bent函數的典型構造方法，並將對k階擬bent函數的密碼性質的研究轉化到對一類特殊的矩陣的研究上；利用布爾函數的特徵矩陣原則上給出了k階擬bent函數的一種完全構造方法，還給出了從已有的p值k階擬廣義bent函數出發，遞歸構造變元個數更多的p值k階擬廣義bent函數的方法；初步探討了k階擬bent函數在序列密碼、分組密碼以及通信中的應用；給出了一類布爾函數walsh譜的分解式，並利用這類布爾函數的walsh譜分解式給出了一類近似穩定的布爾函數的構造，特殊情形下為k階擬bent函數；利用代數數論的知識考察了p值k階擬廣義bent函數的譜特徵，並給出了k階擬廣義bent函數與所有仿射函數的符合率特徵等等。

Then makes a detailed study on the water - level sensor : analysis its working principles, measurement conditions and accuracy, at present, water - level sensor has various sorts and different prices, this paper makes a detailed research about the principle, characteristic and application of the cyg19 : solid - state pressure transducer. and then the text make a research about the system interference, including interference source, types, propagation path and anti - interference measure. at last, having experiments validates its practication

目前，由於水位傳感器的種類繁多，價格相差也較大，本文就所選用的固態壓力傳感器cyg19系列小差壓傳感器的原理、特點及應用進行了詳細的研究；再次，對自動量水儀表系統的干擾部分，包括干擾的來源、干擾的類型、干擾的傳遞方式以及抗干擾措施進行了探討；最後，實驗驗證自動量水儀表的可適用性。

In the end, in view of the fact that boussinesq - type equations and the mild slope equations are deduced from different hypothesis conditions and behave differently in simulation of wave propagation, the numerical results of wave propagation effected by strong non - linearity are given by the nonlinear three - dimensional mathematical model which was established for the calculation of 3 - d wave particle velocity and wave pressure and suitable to small size waters of arbitrarily varying depth

最後，鑒于boussinesq型方程和緩坡方程是在不同的假設條件下推導而來，應用於描述近岸水域波浪的傳播變形時具有不同的特點。本報告根據作者所建立的可以對任意水深點流場與波動凈壓力場進行求解、適宜水深任意變化水域非線性波傳播的數學模型，提供了在較強非線性作用下波浪傳播的數值模擬結果。

The different organs of elaeagnus mollis diels were used in this experiment as the explants. after establishing the aseptic propagation system, the aseptic tube stems and leaves were used to study the effect of different exogenous hormones combination and different culture conditions on organgenesis. the optimum medium and culture condition was screened for fast propagation of elaeagnus mollis diels

本實驗選材為胡頹子科胡頹子屬的翅果油樹，在建立起無菌繁殖系的基礎上，分別以試管無菌莖段和葉片為材料，研究了不同外源激素配比及不同培養條件對其器官分化的影響，從中篩選出適合翅果油樹快速繁殖的最適培養基和培養條件。

In the performance analysis of 3gpp, only the tradition serving cell selection is considered, which is only based on sir. however, 3gpp recommends that determination of the best cell not only be based on radio propagation conditions but also available resources

目前， 3gpp只對基於信干比的服務小區選擇演算法進行了性能分析，但建議服務小區選擇要綜合通道質量和小區資源進行選擇。