查询词典 frequency histogram

Lthough a low frequency of abnormal growthof nucellus was observed,no embryo originating from nucellus cell and integumentwas found.

PⅣ珠心组织出现低频率的异常生长现象，但未观察到由珠心细胞发育形成的不定胚。

The tunable carrier frequency helps avoid the detection null points and improve the system sensitivity.

并且载波频率可以通过信号发射器进行设置，能够消除探测盲点的出现，提高探测灵敏度。

A simple of improving the differential frequency by D flip-flop is introduced. The method is verified by timing analysis. Numberical application conditions are given out. The reason for the error production is analyzed and the maximum error range are calculated.

介绍了D触发器差频的方法和应用条件，用最基础的时序分析的方法，对D触发器差频做一个理论上的验证，定量给出应用条件，并分析了产生误差的原因和最大的误差范围。

The numberical calculations and electro-magnetic simulations were made on the Small Aperture Coupling which the frequency were in the range of 30GHz-40GHz.

二、对小孔耦合理论进行了研究，讨论了在工程中比较常见的两种孔缝耦合的方式，并分别计算了两种耦合方式下的S参数。

Press numeric key 0 - 9 to enter a frequency of 7305.0kHz.

按数字键 0 - 9 来登记频率7305.0kHz 。

A sample numerical design method for constant beamwidth beamformer is given. This method is easy to implement and has no restriction on array geometry and sensor patterns; Three methods for the design of broadband frequency invariant beamformer are proposed, which are the method of resampling signals received by the array, the DFT interpolation method and adaptive synthesis method, respectively. Examples and performance analyses are given for each method; A simplified linear constrained minimum variance broadband adaptive algorithm that based on DFT interpolation method is presented. Compared with conventional broadband adaptive algorithms, the presented method can reduce computation work greatly.

提出了一种简单、易于实现的恒定束宽波束形成器设计方法，该方法对阵形和阵元指向性没有任何限制；分别提出了基于阵列接收数据重采样、基于DFT插值和自适应综合的三种具有频率不变波束图的宽带波束形成器设计方法，对于每一种设计方法都给出了一个设计实例并做了性能分析；提出一种基于DFT插值的简化线性约束最小方差宽带自适应阵列算法，该方法可以大大降低自适应阵列的运算量。

IDFwas proposed recently to solve the problem in control.In this paper,we study the frequency characteristics of IDF,and then compare it with that of numerical differentiation and typical differentiator.

研究了IDF的频率特性，并与数值微分频率特性、典型微分环节的频率特性进行了比较，然后对其进行了误差分析。

Inverse digital filter ; numerical differentiation ; frequency characteristic

反数字滤波器；数值微分；频率特性

In the actual application systems of measurement, a transient process is created in a RL circuit, and then the frequency and time constant of RL circuits can be accurately estimated using numerical differentiation methods.

深入研究和分析了具有电感和电阻的电流互感器和电压互感器的等值电路，在实际测量应用中人为地造成一个RL电路的暂态过程，采用数字微分算法能够快速准确地算出RL电路的频率和时间常数，进而计算出电流互感器和电压互感器的角差。

The items (1) and (3) stated above indicate that both the theory of the collision frequency function and the numerical method require further investigation, and will be studied in the second year.

上述(1)及(3)两项显示目前的碰撞频率函数理论模式并不完备，且数值方法亦有进一步研究的必要，而是下年度主要的研究工作。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。