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相关语句
  propagation
    ON COUPLING EQUATION OF WAVE PROPAGATION IN THE INHOMOGENEOUS PLASMA
    非均匀等离子体中波传播耦合方程
短句来源
    CHARACTERISTICS OF WHISTLER PROPAGATION AT WUCHANG AND THEIR CORRELATION WITH GEOMAGNETIC ACTIVITY
    武昌哨声的传播特征及其与地磁活动的相关
短句来源
    Three Dimensional Propagation Characteristics of the Flare-Associated Interplanetary Shock Wave During 1978-1981
    太阳活动高年期间(1978—1981)耀斑-行星际激波传播的三维平均特性——日本行星际闪烁(IPS)观测的初步分析
短句来源
    PROPAGATION CHARACTERISTICS OF WINTER WHISTLERS IN NORTHERN CHINA
    中国北方地区冬季哨声的传播特征
短句来源
    NORTH-SOUTH ASYMMETRIC PROPAGATION OF FLARE-ASSOCIATED INTERPLANETARY SHOCK WAVES
    耀斑-激波的南-北非对称性传播
短句来源
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  propagating
    Some Characteristics of Whistler Mode Waves Propagating Through the Low-latitude Ionosphere
    哨声模波通过低纬电离层传播的某些特征
短句来源
    Oblique Propagating Ion Solitary Waves in a Magnetized Plasma
    磁化等离子体中斜传播的离子孤波
短句来源
    PROPAGATING MATRIX AND ITS APPLICATION IN TRANSVERSELY ISOTROPIC MEDIA
    横观各向同性介质中的传播矩阵及其应用
短句来源
    Pseudospectral modeling for the characteristics of elastic waves propagating in anisotropic media
    各向异性介质中弹性波传播特征的伪谱法模拟研究
短句来源
    PROPAGATING CHARACTERS OF STRAIN WAVE IN PILE
    应力波在基桩中的传播特性
短句来源
更多       
  the propagation
    EXPERIMENTAL STUDY OF THE PROPAGATION OF FLEXURAL WAVES IN AN ANISOTROPIC BOREHOLE MODEL
    弯曲模式波在各向异性井孔中传播的实验研究
短句来源
    Influence of Background Wind Shears and Temperature Gradients on the Propagation of Atmospheric Gravity Waves
    背景风场和温度梯度对重力波传播的影响
短句来源
    A Mathematical Model of the Propagation of Rayleigh Wave in Multi-layer-medium
    多层介质中瑞雷波传播的数学模型
短句来源
    Models for simulating the propagation of fluctuating pressure in gaps of stilling basin slab
    脉动压力在消力池底板缝隙传播的瞬变流模型和渗流模型统一性探讨
短句来源
    Numerical Study on the Propagation of Gravity-Wave Packet in Time-Variant Background Fields
    重力波波包在时变背景场中传播的数值研究
短句来源
更多       
  propagates
    The results show that there exist fast quasi P wave,slow quasi P wave,quasi SH wave and quasi SV wave as well as also there appears the phenomenon of S wave splitting and acute wave plane when elastic wave propagates in the transversely isotropic porous medium,which show the correctness of BISQ theory and laid the foundation of further applied study.
    结果表明 ,弹性波在横向各向同性多孔隙介质中传播时存在快拟 P波、慢拟 P波、拟 SH波和拟 SV波 ,同时出现横波分裂、波面尖角等现象 ,从而验证了 BISQ理论的正确性 ,并为进一步应用、研究奠定了基础。
短句来源
    The rupture nucleates near the hypocenter, then propagates to the two ends of the fault with an average velocity of 28km/s, and the slip reaches to its maximum value of 43cm at about 5km northeast of the epicenter.
    破裂在震中处成核,然后以2.8kms的平均速度向两侧传播,在震中以东偏北5km处达到最大滑动43cm.
短句来源
    When the SV-wave whose incidence is vertically propagates from the bottom, with water's no burdening shearing stress, the respond of displacement or acceleration on surface is the same.
    SV波垂直从底边界入射时,由于水并不能承受剪切作用,所以两相介质和单相介质对地震波的传播影响一致。
短句来源
    First of all, the paper indicates characteristic of seepage while the waves propagates in poroelastic formation, and emphasize the meaning of additional mass and of dynamic permeability.
    首先分析了声波在孔隙介质中传播时渗流运动的特点,着重讨论了附加质量和动态渗透率的意义。
短句来源
    Propagation properties of gravity waves in the stratified dust plasma have been studied. The results show that, compared to the ordinary gravity waves, the dust plasma changes the dispersion relation, restricts the propagation of the gravity waves of small horizontal wave number, changes the wave energy property, and decreases the amplification of the gravity wave's amplitude when it up propagates in the asymmetric atmosphere.
    结果表明尘埃等离子体改变了通常大气中的重力内波的色散关系,限制了小水平波数重力内波的传播,改变了波的能量特性,减小了重力波在不均匀大气中垂直向上传播时振幅的增长;
短句来源
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  propagation
We give strong evidence that the analog of finite propagation for the wave equation does not hold because of inconsistent scaling behavior in space and time.
      
Prolate Spheroidal Wave Functions (PSWFs) are a well-studied subject with applications in signal processing, wave propagation, antenna theory, etc.
      
This transformation is particularly useful for the research on wave propagation in acoustic waveguide.
      
The authors also modified the brief propagation decoding algorithm, proved the symmetry and showed the stability conditions of the channels, and calculated the Shannon limits on Rician channels in this paper.
      
Moreover, the proposed algorithm can be used in both homogenous and heterogeneous wireless networks, and it can also work without an explicit propagation channel model or the position information of nodes.
      
更多          
  propagating
The scattering of plane time-harmonic electromagnetic waves propagating in a homogeneous chiral environment by a perfectly conducting grating is studied.
      
Permissions propagating to control, conflict and cyclic in delegable model were analyzed and resolved.
      
Compared with conventional methods, this motion measurement algorithm based on multi-level simultaneous wavelet transform avoids propagating errors between the decomposed levels.
      
In this review article, we discuss both experimentally and theoretically the second-order double-slit interference for a thermal light source which is random in transverse propagating direction.
      
Much of our work has direct impact on the study of similar discrete phenomena in systems beyond optics, including sound waves, water waves, and matter waves (Bose-Einstein condensates) propagating in periodic potentials.
      
更多          
  the propagation
The propagation of drought-resistant transgenic poplars is one of the more effective ways to improve the ecological state of arid regions.
      
It is important to analyze the propagation characteristics of guided waves in acoustic leak location in pipelines.
      
Photonic crystal, a novel and artificial photonic material with periodic dielectric distribution, possesses photonic bandgap and can control the propagation states of photons.
      
The recent progresses on the propagation, generation and application of partially coherent beam (PCB) are reviewed in this paper.
      
A new tensor ABCD law for treating the propagation of partially coherent Gaussian-Schell model (GSM) beams through a paraxial optical system is derived.
      
更多          
  propagates
However, the fiber nonlinear effects and polarization mode dispersion severely limit the performance of the system when signal propagates at 40 Gbit/s in a single channel.
      
These currents penetrate into the conductive region with anisotropic conductivity of the D- and E-layers of the ionosphere, being transformed to a MHD-wave that propagates into the magnetosphere.
      
The conditions are determined under which the Alfven impulse with an amplitude of up to 100 nT propagates in the magnetosphere above high-altitude discharge of this type.
      
Upon the occurrence of the second-type regime, the heating region first stretches in the direction perpendicular to the direction of vibrations and then propagates at a rate typical for the undisturbed case.
      
The solution is found for the equations of a motion containing a shock wave which propagates through a quiescent gas with variable initial density and constant pressure.
      
更多          
  其他


~~

本文首先說明坡面径流研究的重要性。其次对于各种坡面流速公式,以及集流时間及退水时間公式作一簡单概述。文中对人工降雨坡面径流专門試驗給出簡要的描述。对于这些試驗結果进行經驗整理,得到下列形式的坡面流速公式: v=(K_q)~(1/2)I~(1/3)式中:v——断面平均流速(厘米/秒);I——坡面的坡度;q——单寬(1米)流量(升/分钟);K——系数,草地为3.0,光地为7.5。至于坡面集流时間,則因按稳定流或不稳定流計算而异。試驗表明,稳定流坡面集流时間对坡面洪峯传播时間(不稳定流)之比約等于2。文中对坡面退水时間理論公式与試驗数据进行厂比較,发現理論公式計算結果偏小,并提出了坡面退水时間經驗公式。

In this article various methods are described for studying the ionosphere and radio wave propagation by means of geophysical rockets and Earth's Satellities. The relations between these methods and the subjects, which can be studied by the methods, are shown. The essential results, which are obtained until now, are illustratied. In the last, the main tendency of further studies is briefly remarked.

本文叙述了利用地球物理火箭和人造地球卫星研究电离层和无綫电波传播的各种实驗方法,对各方法之間的关系及其所能解决的問题作了說明,并綜述了在这方面已經得到的重要研究成果。最后扼要地指出了今后研究的主要趋向。

Chisnell- no's method is applied to studying the propagation of a perpendicular hydromagnetic shock wave in the inhomogeneous magnetic field. A new shock parameter, the characteristic velocity of shock wave representing' the geometric mean of the shock velocities in both sides of the front, has been introduced. The propagation equation thus obtained is greatly simplified. The equation is integrated by numerical method in the case of "strong magnetic medium", where the Alfvén velocity is much greater than the...

Chisnell- no's method is applied to studying the propagation of a perpendicular hydromagnetic shock wave in the inhomogeneous magnetic field. A new shock parameter, the characteristic velocity of shock wave representing' the geometric mean of the shock velocities in both sides of the front, has been introduced. The propagation equation thus obtained is greatly simplified. The equation is integrated by numerical method in the case of "strong magnetic medium", where the Alfvén velocity is much greater than the sound velocity. Three types of particle density distribution are considered: (1) the Alfvén velocity is constant, (2) the density is uniform and (3) the ratio of the density to the field intensity remains constant. It is shown that when a shock wave propagates from a weak field into a strong one, its strength measured by the jump ratio of field intensity always decreases. For medium with a constant Alfvén velocity the shock wave decays most slowly; for a medium of uniform density the shock wave attenuates most quickly; while for the constant density-field ratio medium the attenuation rate appears to be intermediate. In the weak shock limit, the amplitude of wave is inversely proportional to the square root of the Alfvén velocity. These results are discussed in relation to the magnetic shock propagating in the earth's magnetosphere on the assumption that the whole space is filled with wholly ionized hydrogen plasma whose density is proportional to the field intensity, as confirmed by whistler observation from 2 to 5 earth's radii distance. In this case, it is shown that a shock wave of initial velocity 10~8cm/sec at 10 earth's radii distance will excite a 60γ field change in the earth's surface, comparable to the order of magnetitude of the sudden commencement of a strong storm in the lower latitudes.

本文应用Chisnell- no方法,求解了在理想介貭中,垂直磁流体冲激波在非均勻磁場中的传播問題。这种方法,把非均勻介貭分解成无限小的弱間断面,根据气体动力学中波与間断面相互作用的原理,算出激波通过弱間断面时的强度变化,然后用积分求得激波通过整个非均勻区时的强度变化。作者引入了激波的特征速度(它是激波在波前后介貭中传播速度的几何平均值)作为輔助参量,得到形式上比較簡单的激波传播方程。然后考虑了磁压力远大于气体压力的强磁介貭中的激波传播問題,并进行了数值积分。采用的介貭密度模型有三种:(1)阿尔芬波速为常数;(2)密度不变;(3)密度与磁場强度成正比。計算結果表明:当激波由弱磁場向强磁場传播时,激波的强度逐漸变弱。其中,在阿尔芬波速为常数的介貭中,激波强度的衰减最为緩慢;在密度不变的介貭中,激波强度的衰減最为迅速;而在密度与磁場成正比的介貭中,激波强度的衰減則介乎上述两种密度分布之間。作者联系磁流体冲激波在地球外层空間的传播問題进行了討論,密度的模型采取大气啃昔的观測結果(卽上述第三种密度分布),并进行了适当的外推,估計了在十个地球半径处...

本文应用Chisnell- no方法,求解了在理想介貭中,垂直磁流体冲激波在非均勻磁場中的传播問題。这种方法,把非均勻介貭分解成无限小的弱間断面,根据气体动力学中波与間断面相互作用的原理,算出激波通过弱間断面时的强度变化,然后用积分求得激波通过整个非均勻区时的强度变化。作者引入了激波的特征速度(它是激波在波前后介貭中传播速度的几何平均值)作为輔助参量,得到形式上比較簡单的激波传播方程。然后考虑了磁压力远大于气体压力的强磁介貭中的激波传播問題,并进行了数值积分。采用的介貭密度模型有三种:(1)阿尔芬波速为常数;(2)密度不变;(3)密度与磁場强度成正比。計算結果表明:当激波由弱磁場向强磁場传播时,激波的强度逐漸变弱。其中,在阿尔芬波速为常数的介貭中,激波强度的衰减最为緩慢;在密度不变的介貭中,激波强度的衰減最为迅速;而在密度与磁場成正比的介貭中,激波强度的衰減則介乎上述两种密度分布之間。作者联系磁流体冲激波在地球外层空間的传播問題进行了討論,密度的模型采取大气啃昔的观測結果(卽上述第三种密度分布),并进行了适当的外推,估計了在十个地球半径处的磁流体冲激波传到地面时的强度,求出了激波在地面引起的磁場变化与激波初始速度之間的关系。根据上述簡化模型,計算結果表明,在十个地球半径处初始速度为10~8厘米/秒的激波,传到地面引起的磁場变化大約为60伽(亻馬),这个数值的量級恰好与中低緯度强磁暴的急始变幅相符。

 
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