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   衰减周期 的翻译结果: 查询用时:0.51秒
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衰减周期
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  “衰减周期”译为未确定词的双语例句
     Firstly, optimal operation cycle has been determined, then the influence of sludge age,dissolved oxygen, CODCr, pH, temperature, C/P on phosphorus removal has been compared when predominant bacteria added and not added in SBBR process. At the same time, the attenuation cycle of predominant bacteria was observed.
     首先确定了投加优势菌种后SBBR 工艺除磷的最佳运行周期,然后着重对比了污泥龄、溶解氧、进水CODCr浓度、pH 值、温度、碳磷比对投加优势菌种和未投加优势菌种的SBBR 工艺除磷效果的影响,同时观测了优势菌种的衰减周期
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     adpots a kind of network handling to remove the influence of attenuation nonperiod parts and fraction resonance waveforms of singnals.
     采用网络处理方式消除衰减周期分量、非整次谐波分量等的影响 .
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  相似匹配句对
     The Periodic Degenerate Solution of Second-order Nonlinear Equations
     二阶非线性方程的周期衰减
短句来源
     Study on Attenuation Relationships of Long Period Ground Motions
     长周期地震动衰减关系研究
短句来源
     A BRIEF DISCUSSION OF CYCLE
     周期浅析
短句来源
     Then b is called the base of A. and p the period of A.
     p为A的周期.
短句来源
     Attenuation: 2;
     衰减2;
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  decay period
Constraints on the decay period of a free neutron from the characteristics of tritium beta decay
      
The reduced decay period of the triton, (ft1/2)T=(1129.6±3)s, and the free-neutron decay period, (t1/2)n=(616.7±;2.7±1.3) s, are determined from the experimental and theoretical values of the chemical shifts of atomic and molecular tritium.
      
Production and loss of N2+ ions during the decay period of plasmas produced in helium-nitrogen mixtures
      
Energy and radiative lifetime requirements suggest that N2+ is produced during the plasma decay period by the process N2 (a'1 Σu-)+N2 (a'1σu-→N2+ (X2Σu+)+N2(X)+e.
      
Production and loss of N2+, Ne+ and Ne2+ during the decay period of plasmas produced in neon-nitrogen mixtures
      
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A general treatment of some integration schemes of single-step method is given by using weighted residual method and a high precision integration scheme is proposed in this paper. The unconditional stability, accuracy and local truncation error of this scheme are studied and compared with those of other current schemes. Some numerical examples are also given here.

基于加权余量法,本文提出了统一处理某些单步法逐步积分格式的方法.据此,本文还提出了一种高精度逐步积分格式。文中就格式的稳定性、算法阻尼比、振幅衰减、周期延长和局部截断误差的阶等问题进行了讨论,还给出了多自由度体系的相应计算公式。最后,给出了计算实例.把所得的结果和由其他逐步积分格式得到的相应值以及精确解作了对比。

In this paper, a family of travelling wave solutions of nonlinear internal gravity wave in stratified shear fluid is analyzed. An autonomus dynamic system of firstorder differential equations with perturbation velocity u and desity p as unknowns is thus obtained. Qualitative analysis of the topological structu re of integral curves of this system in the neig-hourhood of the origin on the phase plane with u. ρ as cartesian coodinate axes is given.In the plane with parameters du/dz (the shear velocity)and N2 (N...

In this paper, a family of travelling wave solutions of nonlinear internal gravity wave in stratified shear fluid is analyzed. An autonomus dynamic system of firstorder differential equations with perturbation velocity u and desity p as unknowns is thus obtained. Qualitative analysis of the topological structu re of integral curves of this system in the neig-hourhood of the origin on the phase plane with u. ρ as cartesian coodinate axes is given.In the plane with parameters du/dz (the shear velocity)and N2 (N being Brunt-Vaisala fre-qency) as coodinates, there are nine regions with different properties of the singularity at the origin of the phase plane. This singular point is a unstable saddle point if Richardsonnumber Ri< 0 whether du/dz be positive or negative; while as Ri >, this singular poi-nt corresponds to an instability if du/dz is positive but to stability if du/dz is negative. In thesecond quadrant of the du/dz N2 plane the parabola N2 =1/4(du/dz)2 corresponds to the case Ri=1/4 , Which divides this quadrant into two different regions. If the parameters lie below this parabola the origin of phase plane should be a node; It is a centre if du/dz=0, and if the parame-ters lie in a region above the parabola then the origin should be a focus.The nonlinear terms of our differential equations were expanded up to second order. It is shown that the topological structure of the second-order systems is identical with that of first-order systems, the centre point of firstorder systems remains a centre terms. It is interesting that the periodic solution of the second-order systems near the origin satisfy the well-known Kd V equation and corresponds to cnoidal waves. We consider second order terms in order to describe more precisely the variation with time of the flow parameters. This in turn may describe some observed phenomena in the atmosphere and ocean, which can not be explained by considering only first order terms.

本文从层结切变流体的非线性重力内波方程出发,考虑了行波一类流动,对于这一类流动,导得了两个变量(扰动速度和扰动密度)的一阶自治动力系统的常微分方程组.并在以扰动速度和扰动密度为坐标的相平面原点附近,用微分方程定性理论的方法对积分曲线的几何拓扑结构作了定性分析。在相图上按Richardson数不同,把积分曲线分成若干不同性质的区域。当Ri<0时,不管速度切变dū/dz是正是负,奇点是不稳定的鞍点。当Ri>0时,正切变dū/dz区奇点是不稳定的,负切变dū/dz区奇点是稳定的(01/4时是稳定焦点,即存在振幅衰减的周期解;Ri→∞时是稳定的中心,即存在周期解)。 对非线性项展开保留到二次项得到二次系统。分析表明,解的拓扑结构和一次系统完全一致.一次系统的中心点仍是二次系统的中心点,二次系统的周期解满足著名的K_dV方程,是椭圆余弦波.二次系统其它情况下的解(即随时间才变化的速度)和一次系统并不相同,更反映大气和海洋的许多现象(包括湍流)的实际情况。

This paper chiefly introduces a kind of new method about increasing speed and precision of algorithm for the basic waveforms of signals estimation in distance protection.The method adopts one period window recursive Fourier algorithm to quicken the speed of caculation and reduce the time of calculation;adpots a kind of network handling to remove the influence of attenuation nonperiod parts and fraction resonance waveforms of singnals.Simulation results show that the algorithm can reduce the burden of calculating...

This paper chiefly introduces a kind of new method about increasing speed and precision of algorithm for the basic waveforms of signals estimation in distance protection.The method adopts one period window recursive Fourier algorithm to quicken the speed of caculation and reduce the time of calculation;adpots a kind of network handling to remove the influence of attenuation nonperiod parts and fraction resonance waveforms of singnals.Simulation results show that the algorithm can reduce the burden of calculating efficiently,it does not suffer the influence of attenuation nonperiod parts and fraction resonance waveforms of signals parts.Morever,the paper makes a brief introduction to computerized distance protection of adopting the Artifcial Neural Network.

主要介绍了一种提高距离保护基频分量估计算法速度和精度的新方法 .该方法采用递推全周富氏算法 ,实现微机距离保护在 段范围内采用“反时限动作特性”;采用网络处理方式消除衰减周期分量、非整次谐波分量等的影响 .仿真结果表明 ,本算法能很有效地减少计算时间 ,并且不受衰减非周期分量、非整次谐波分量等的影响 .另外 ,对所实现的神经网络式微机距离保护也作了简要介绍 ,并给出测试结果 .

 
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