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脉动     
相关语句
  pulsation
    Atomization of a Liquid Drop by Pulsation
    液滴的脉动雾化
短句来源
    Observation findings showed that the propagation velocity of multiple pulsation under water is basically consistent with the progapation velocity of water-hammer wave, and the energy of multiple pulsation equals (13.9%)-(21.7%) of the energy of water-hammer wave.
    观测成果表明:多次脉动在水中的传播速度与水击波的传播速度基本一致,多次脉动的能量占水击波能量的13.9%~21.7%。
短句来源
    A RESEARCH ON THE ATTENUATION PERFORMANCE OF GAS FLOW PULSATION AND NUMERICAL METHOD IN PERFORATED TUDE WITH ORIFICE PLATE
    孔板穿孔管气流脉动衰减性能及计算方法的研究
短句来源
    A METHOD OF CALCULATING PRESSURE DISTRIBUTION OF PERIODIC PULSATION FLUID TRANSPORTED IN PIPING NETWORK
    周期性脉动流体管路输送系统压力分布求解
短句来源
    A STUDY ON PULSATION OF TWO-DIMENSIONAL CAVITATING FLOW
    二维空泡流的脉动性态研究
短句来源
更多       
  fluctuation
    TRANSFER FUNCTION FOR SCALAR FLUCTUATION "ENERGY" AND-5/3 POWER LAW
    标量脉动“能量”传递函数与—5/3次方律
短句来源
    Calculation of Motion of a Single Bubble in Pressure Fluctuation Field
    单气泡在压力脉动场中运动的数值计算
短句来源
    A JOINT FLUCTUATION VELOCITY PDF TRANSPORT EQUATION OF TWO-PHASE FLOWS
    湍流两相流的脉动速度联合PDF输运方程
短句来源
    A joint PDF transport equation for particle-fluid fluctuation velocity in two-phase flows
    颗粒-气体脉动速度联合PDF输运方程的封闭
短句来源
    Floquet Stability Analysis of Two-Layer Flows With Periodic Fluctuation in a Vertical Pipe
    圆管内含周期脉动分层流的Floquet稳定性分析
短句来源
更多       
  fluctuating
    APPLICATION OF THE THEORY OF TURBULENT FLUCTUATING FUNCTION TO THE AXISYMMETRICAL FLOW COMPUTATION
    湍流脉动作用理论在轴对称流动计算中的应用
短句来源
    Fluctuating Correlation and Dissipative Law of Velocity and Temperature in Jet-Flow
    射流中速度和温度的脉动关联及耗散规律
短句来源
    Experiment Study on the Fluctuating Pressure of Muddy Water
    浑水脉动压力试验研究
短句来源
    Mathematic Derivation of the Conversion Between a Point Fluctuating Pressure and Surface Fluctuating Pressure on Solid Side
    固体边壁上点面脉动压力转换的数学推导
短句来源
    Wavelet analysis of the relation between the fluctuating wall pressure and turbulent coherent structures
    湍流相干结构与壁压强脉动关联的小波分析
短句来源
更多       
  pulsatile
    A METHOD OF STABILITY ANALYSIS OF PIPES CONVEYING PERIODICAL PULSATILE FLOW
    输送周期性脉动流体的管道稳定性分析的一种方法
短句来源
    In this paper a model of pulsatile flow in cylindrical tube with stenosis is established to study the influence of stenosis on pulse wave.
    本文建立局部狭窄直圆管内脉动流模型,来研究狭窄对脉动流的影响。
短句来源
    If the transmural pressure of a latex tube containing pulsatile flow is negative, the tube will collapse with its cross-sectional area and moment of inertia decreasing.
    当脉动流经过乳胶管时,如果跨壁压力为负,则乳胶管就被压瘪,其截面积和截面惯距都将减小。
短句来源
    It is verified that the periodic change of cross-sectional area and moment of inertia enforces the excitation of the pulsatile flow and the displacement oscilla-tion of the latex tube occurs easily. This agrees well with the experiment results.
    证实了截面积和截面惯距的周期变化加强了脉动流的激励、容易使乳胶管发生位移振荡,这与实验结果在定性上是吻合的。
短句来源
    This paper obtains a proportional factor M after solving the motion equation of pulsatile flow in rigid tube under the influence of externally applied periodic acceleration. With the analysis of M, it is found that the externally acceleration has contrary aspects of influence to the pulsatile flow in arteries.
    本文通过求解外界周期性力场作用下刚性直圆管脉动流的运动方程,得到一个表征外界力场作用的比例因子M,通过对比例因子M的分析,发现外界力场对动脉中脉动流会产生两种完全相反的影响。
短句来源
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  pulsation
Operating characteristics of solid-state fermentation bioreactor with air pressure pulsation
      
The paper deals with the development of a novel SSF bioreactor with air pressure pulsation.
      
By developing a measurement and control system under the Virtual Instrument (VI) concept, the performance of the SSF bioreactor with pressure pulsation was studied by cultivating Trichoderma koningii in solid medium made of wheat bran and corncob.
      
The cooling effects of pressure pulsation on solid porous beds are discussed.
      
Experimental results show that pressure pulsation enhances medium moisture evaporation, and hence, heat dissipation.
      
更多          
  fluctuation
In this paper, the classical risk process perturbed by diffusion is generalized by allowing for "size fluctuation" and the ruin probability for this new model is discussed.
      
A new feature extraction method using the amplitude fluctuation property of target HRRP for radar automatic target recognition
      
Actually, the amplitude fluctuation property of target HRRP also represents some feature information of the target.
      
Based on the scattering center model, a new feature extraction method using the amplitude fluctuation property of target HRRP is proposed in this paper.
      
Effect of soil water changes on photosynthetic characteristics of Taxodium distichum seedlings in the hydro-fluctuation belt of
      
更多          
  fluctuating
The results show that centroids of burned areas in these three regions are in a fluctuating condition that encircles the distribution center.
      
The developmental stability indices, leaf width based fluctuating asymmetry (FA1), and lateral vein length based directional asymmetry (RDA1) of Platanus acerifolia were studied.
      
Fluctuations and patterns of desert rodent communities under human disturbance: fluctuating tendency and sensitive response of t
      
The fluctuating tendency of rodent communities and the sensitive response of their populations were studied using mark-recapture and trap-day methods.
      
Annual variation in hematological indices in a fluctuating population of bank vole (Clethrionomys glareolus)
      
更多          
  pulsatile
Unsteady effects in weakly perturbed pulsatile channel flows
      
Pulsatile incompressible laminar flow in a plane channel with slight asymmetric deformation of the walls is considered on the basis of an asymptotic approach to the solution of the Navier-Stokes equations at large Reynolds numbers.
      
Estimation of the local fraction of cardiac output using a two-phase model of pulsatile hemodynamics
      
Treatment includes the hemodynamic stabilization, simultaneous reduction of the systolic blood pressure, and reduction of the pulsatile aortic flow (shear stress).
      
Pulsatile kardiale Assist-Systeme -?künstliche Herzen"
      
更多          
  其他


In this paper, using the hypothesis for the turbulent Reynolds number ReL>>1 in the cross-section of turbulent free shear flows-mixing zone, plane jet, plane wake, axi-symmetric jet and axi-symmetric wake, the characteristics of velocity fluctuations, temperature fluctuation . and their correlations are clarified. Empirical constants in the equations of correlation are determined by referring to isotropic turbulence. Thus in comparing the present semi-empirical theory with experimental data, only the proportion...

In this paper, using the hypothesis for the turbulent Reynolds number ReL>>1 in the cross-section of turbulent free shear flows-mixing zone, plane jet, plane wake, axi-symmetric jet and axi-symmetric wake, the characteristics of velocity fluctuations, temperature fluctuation . and their correlations are clarified. Empirical constants in the equations of correlation are determined by referring to isotropic turbulence. Thus in comparing the present semi-empirical theory with experimental data, only the proportion coefficient in the diffusive law of turbulent scale and the empirical constants for momentum diffusion and for heat diffusion are determined by experiments.

本文讨论了自由湍流剪流的速度脉动与温度脉动特性.用与各向同性湍流对比确定经验常数的方法,使所论半经验理论与实验数据的比较中,只有湍流尺度扩散律中的比例系数以及动量扩散与热量扩散问题的各自一个经验常数由实验决定.

In this paper, we discuss three fundamental problems of the theory of suspended sand particles based upon the theory of fluid dynamics.

本文从流体动力学的基本理论出发,讨论了泥沙运动理论中的三个基本问题.(1)泥沙在湍性水流中对水的相对速度.(2)水流挟带泥沙以后脉动速度的改变.(3)泥沙在二维渠道均匀定常流动中含沙量的垂直分布和通常的扩散理论的修正.按照我们理论分析的结果,发现和通常水力学及河道动力学中常用的表达式有一些出入.

Dynamic-response-ability of LDA to fluctuating velocities in turbulent flow is discussed first. It is proved then that two sets of elliptically polarized patterns formed in probe volume by two orthogonally polarized intersecting beams will be shifted by λ/(4sinθ/2). This conclusion differs from that derived by Bossel, Rudd and Durst.Results of velocity distribution obtained in the viscous sublayer of an open-channel flow are presented.

本文首先讨论了LDA对湍流脉动具有的动态响应特性。然后分析了两个振动面正交的光束在施测点所形成的椭圆偏振图样,证明45°向偏振的图样与135°向偏振的图样在空间上错开λ/(4sinθ/2),而两个光电检测器输出的电讯号则互差180°相位角,对Bossel,Rudd及Durstr在此问题上的见解提出了异议。文中提供了利用自制的LDA所测明槽水流边界层粘性底层中速度分布的资料。

 
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