组合频率

Polarimetric Synthetic Aperture Radar measures the frequency, magnitude, absolute and relative phase of targets' backscattering signals in imaging scene for any possible combination of transmit and receive antennas. The polarization synthesis technique on one hand has greatly increased the acquired polarization information, on the other hand increased the difficulty of system design and signal processing.

中文摘要极化合成孔径雷达的回波信号可以提供不同收发极化状态组合下成像场景内目标散射波的幅度、绝对和相对相位、频率等信息，极化合成技术的出现使获取的信息量成倍增加，信息量增加的同时系统设计和信号处理的复杂度增加，因此极化合成孔径雷达相关技术的研究成为微波遥感领域的热点。

The studies show that the bi- frequency ultrasound is an effective method for pollutants degradation, but it need to make further study.

实验表明，频率组合对有机污染物的降解是一条有效途径，但需要更进一步的研究。

On the basis of the frequency domain Born approximation theory of the scattering of two dimentional elastic waves, the time domain Born approximate solution to the scattering of elastic wave s with arbitrary frequencies is derived.

在二维弹性波散射频域Bron近似解的基础上，通过Fourier变换，推导了任意频率平面P波组合的脉冲波入射二维散射系统时，散射场的时域Born近似解。

This paper presents a frequency analysis method to analyze the propagation procedure of transient error in combinational logic.

提出一种新颖的频率分析方法来计算瞬时错误在组合逻辑电路中的传播。

Furthermore, 142 accessions could be divided into three major groups using the clustering analysis, indicating that the gliadin variations among durum wheat were associated with their geographic origin.

高分子量谷蛋白电泳共分离出14种亚基和15种亚基组合，但是优质亚基所占比例不高，这可能是因为硬粒小麦加工用途的特殊性，使得多年的育种并未太多改变硬粒小麦高分子量谷蛋白亚基等位变异的频率，促成优质亚基的累计。

Nf will repeat exactly after a time T = 1/f. The harmonic series is special because any combination of its vibrations produces a periodic or repeated vibration at the fundamental frequency f.

系列的谐音ㄈ长特别是因为在任何的组合下，其本身的震动产生了一个和基础频率f周期性且或重复性的震动。

The effects of changes of heterozygote in the absence and presence of insecticides and the degree of its dominance on evolution in three different combinations of R allel frequency and population size were investigated by computer simulation.

通过计算机模拟，研究了在R基因频率和种群大小的三种不同组合情况下，害虫抗性杂合于在用药或不用药时对抗性进化的影响。

On the other hand, comparing with scarce data in the corpus study, the great difference between the high accuracy of the single SFPs and the low accuracy of ill-formed sequences in the experiment argued that children do not purely repeat back and adult input frequency is irrelevant to the emergence order of SFPs.

另一方面，把实验跟语料库的两项研究相比之下，大人及小孩其句末助词的自然语料相当的少，合语法及不合语法的句末助词组合之间却有很大的不对称性，所以显出小朋友并不是单纯的重覆模仿，也显示了句末助词的习得顺序不一定跟大人输入讯息的频率有关。

The three dimensional model on engine block combination structure of a piston engine is established by the ANSYS software,and the modal analysis is carried out in the case of constrained model.

采用ANSYS软件对某活塞发动机机体和缸盖的组合结构进行了约束模态的有限元分析，得到了机体组合结构的前20阶约束模态的固有频率及相应振型。

Receiving seismic signal has to use geophone with variable natural frequency or the combination of several geophones with different natural frequencies in the field.

野外接收地震信号要用可变自然频率的检波器或用多个不同自然频率的检波器组合。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。