查询词典 characteristic differential equation

Elastic and inelastic differential and integral cross sections for low-energy vibrational excitation of H2 by electron impact are studied with exact exchange. The resulting coupled integrodifferential equations are solved using a combination of linear-algebraic and R-matrix-propagator techniques.

严格交换势用于研究低能电子与H2分子的弹性和非弹性散射截面，线性代数方法和R-矩阵传播子相结合求解基于振动密耦合方法的积分-微分耦合方程组，由此得到收敛的散射微分截面和积分截面。

As a differential detection is used between the intercarrier, the proposed algorithm overcome the high sensitivity to timing error of conventional algorithm and is robust to multi-path. The effect of sample frequency offset can't be ignored in a continuous OFDM system of a large number of subcarriers. The estimation precision of the conventional algorithm is low and the realization is complex. A joint estimation of sample frequency offset and fine frequency offset based on difference operation is proposed. As averaging use a large number of samples in a maximum likelihood algorithm, the estimation precision is very high. The use of difference operation cancel the effect of carrier frequency offset, and the proposed sampling frequency estimation algorithm is robust to carrier frequency offset.

最后，本文对连续系统中的采样频率和载波频率精同步技术进行较为深入的研究，由于子载波数目大的连续OFDM传输系统中，采样频率偏差不可忽视，以往的采样频率估计方法精度低、实现复杂，因此本文提出了一种基于差分处理的采样频率偏差和精载波频率偏差联合估计算法，利用了最大似然算法进行采样频率偏差的估计，由于采用了差分处理方法，消除了载波频率偏差对采样频率偏差估计的影响，采用的最大似然算法对大量样点进行平均化处理，所以，相对以往算法，提出的联合算法估计精度高，而且采样频率偏差估计对载波频率偏差具有鲁棒性。

Both extrapolation (latency-correction) and differential latency (latency-reduction) models invoke the biological significance of detecting a moving object quickly and its position accurately, and the ensuing increased likelihood of successful interceptive behavior.

运动外推假说和知觉潜伏期假说模型都显示出了探测快速运动物体以及准确判断它的位置进而提高截断性动作成功率的可能性的生物学意义。

Purpose To investigate the different histopathological features, proliferation and differential characteristics between atypical immature metaplasia of cervix and cervical interepithelial neoplasia grade Ⅲ.

目的 探讨子宫颈非典型性不成熟鳞状上皮化生与子宫颈CIN Ⅲ形态学及增殖分化特征的差异。

By using shear -- lag method, the calculation of interlaminar stresses in composite laminate is transformed into calculating eigenvalues of a group of ordinary differential equations in this paper.

本文采用剪滞模型将复合材料层压板层间应力的计算转化为计算一组常微分方程的特征值问题。通过对不同铺层层压板层间应力的计算和比较表明：本文给出的方法简单，且行之有效

If the car is forced, you may come to the point where (like on this particular truck Land Rover) you would need to change the whole drive shaft system, ring and pinion, ARB locker system AND the differential housing which was irremediably damaged.

如果赛车强迫，您可能会来的地步，你需要改变整个传动轴系统，戒指和小齿轮，ARB的更衣室系统和差速器壳体这是不可弥补的损害。

Methods Purification results were compared among the differential combination chromatography of anion and cation exchange, anion and cation exchange chromatography of both isocratic elution, and affinity chromatography.

阴、阳离子交换示差组合色谱法，以等度洗脱方法进行的阴、阳离子交换组合色谱，以及亲和色谱的纯化结果相对比。

There were 11 differential protein spots between the two groups and their molecular weight and isoelectric point were identified primarily.

对照组和预处理组间有11个明显差异的蛋白点，初步确定其等电点和分子量。

To determine differential expression of genes between near isogenic lineMardler/7*Bainong 3217 and Bainong 3217,cDNA-AFLP was employed to assay gene expressed in different time points after inoculation with powder and different treatments.

采用cDNA-AFLP(cDNA-amplified fragment length polymorphism)技术，对小麦抗白粉病近等基因系Mardler/7*百农3217和百农3217材料的不同处理，于接菌后不同时间点的基因表达进行了表达分析。

The Schizosaccharomyces pombe plasma membrane H(superscript +)-ATPases are obtained by differential centrifugation, acid treatment and isopycnic centrifugation in a discontinuous sucrose gradient to study the effects of Ca(superscript 2+), CaM and CaM inhibitors on activity of purified plasma membrane H(superscript +)-ATPase.

经差速离心，酸处理，蔗糖密度梯度离心制备粟酒裂殖酵母质膜H-ATP酶，以研究Ca(上标 2+)、CaM以及CaM拮抗剂对纯化的质膜H-ATP酶活性的影响。

Liapunov—Schmidt method is one of the most important method in the bifurcation theory.

Liapunov—Schmidt方法是分叉理论的最重要方法之一。

Be courteous -- even when people are most discourteous to you .

要有礼貌──即使当別人对你最不礼貌的时候。