查询词典 constant field

The spring constant, the mass, the constant of attenuation and the angular frequency of the exciting oscillation can be changed within certain limits.

弹簧振动的劲度系数、质量、衰减量和角频率可以在一定限度内被改变。

In the"willow leaf"TEM horn, the characteristic impedance varies from 50Ω to the 377Ω free space impedance, thus its metal plates have shapes similar to willow leaf. The constant impedance TEM horn consists of two tri-angular metal plates, with it's characteristic impedance at arbitrary cross-section being a constant.

采用FDTD方法，对'柳叶'TEM天线、恒阻抗TEM喇叭天线及低频补偿TEM喇叭天线的反射特性、口面场分布、主轴辐射场特性、辐射场方向特性进行了分析，并对各自的特性进行了比较。

The relation of directions of phase constant and attenuation constant in conductive media ［J］.

导电介质中电磁波相移常量与振幅衰减常量的方向关系［J］。

The results show that there are three discontinuity points at the critical angle of the phase constant, the critical angle of attenuation constant and 90°.

结果表明：入射角在相移常数临界角、衰减常数临界角和90°处，横向偏移曲线存在三个间断点。

The results of numerical modeling indicate that the thin film microstrip lines with finite ground width have good broad band characteristics and the characteristic impedance, attenuation constant and effective dielectric constant have small change with the finite ground width changing.

作者用该程序对有限接地面薄膜微带线进行了时域仿真，结果显示在保证传输模不受干扰的情况下，在较宽频带范围内有限接地面对微带特性有微弱影响。

Through the international cooperation the metrologists are striving to redefine the mass standard depending on unchanging properties of nature based on the concept of Avogadro constant and Planck's constant.

近年来，计量学家通过国际合作，试图基于自然的不变性质、阿佛加德罗常数和普朗克常数的概念重新定义质量基准。

The result indicates that the poach dissipation of ceramics can be reduced when low impurity constant barium carbonate raw material with spheroidal particles is used;and the relationship of dielectric constant to temperature is more stabilized.

结果表明，杂质含量低、球形颗粒的碳酸钡原料能显著降低陶瓷的水煮损耗，但陶瓷水煮损耗异常和其致密性不存在对应关系。

The Approximate time constant of the system is the sum of all the time constants of the one-order lags and for the biquadrafic lag system, and the approximate time constant is the first-order coefficient of the binomial.

不同的比例导引系数下，脱靶量归零的无量纲时间是一定的，即等效时间常数与末导时间呈线性关系，据此可以估算系统的末导时间。

The dynamic analysis based classification method in the early stage of development is brought forward in the first time ,which consists of:firstly ,the material balance equation and the binomial production equation is solved together for those wells with stable production., to yield the anticipation under constant production ,and constant THP afterwards; Secondly, the R/S fractal method is used to demonstrate the declining tendency for those withdegressive production, and the GM(1,1) model is adopted for simulation and anticipation.

在此基础上进行了定产量／压力条件下的动态预测；②对产量递减井，采用分形理论中的R／S方法，对气井产量变化作了连续趋势性论证，在此基础上采用GM(1，1)模型对递减气井的生产动态进行快速拟合和预测。

In order to prepare low dielectric constant glass powder, we use SiO2, boracic acid etc as raw material to prepare glass powder. The result of testing is: its dielectric constant is about 4.0, and it is suit for our experiment.

作为低介常数的玻璃粉料，采用SiO2、硼酸等为原料，通过熔融、研磨制得了玻璃粉料，其介电常数约为4.0，介质损耗为10×10－4。

This immediately brings us to the next part of this article: creating an output "replace function".

下面进入文章的第二部分：建立一个"缓存处理函数"。

He was elected as an International Ornithological Committee member in 2002 during the 24th IOC held in Beijing.

现为中国鸟类学会理事和WPA 专家组成员。2002年被推选为国际鸟类委员会委员。