cosecant是什么意思 cosecant在线翻译 cosecant什么意思 cosecant的意思 cosecant的翻译 cosecant的解释 cosecant的发音 cosecant的同义词

1. 余割：(cosine)、正切(tangent)、余割(cosecant)、正割(secant)和余切(cotangent). 22边角边公理(SAS) 有两边和它们的夹角对应相等的两个三角形全等23 角边角公理( ASA)有两角和它们的夹边对应相等的两个三角形全等24 推论(AAS) 有两角和其中一角的对边对应相等的两个三角形全等25 边边边公理(SSS) 有三边对应相等的两个三角形全等

2. 佘割：corundum刚玉石 | cosecant佘割 | cosineamplitude幅角余弦

3. cosecant

3. 余割 (数学)：剛玉 corundum | 餘割 (數學) cosecant | 餘弦 (數學) cosine

4. cosecant的近义词

4. 余割Btu中国学习动力网：corresponding sides 对应边Btu中国学习动力网 | cosecant 余割Btu中国学习动力网 | cosine 余弦Btu中国学习动力网

1. With the overview of present MIMO antenna research, the thesis brings forward a new kind of polar diversity antenna array applied in MIMO base stations, which elements are planar printed dipoles. The beamforming technology is used to obtain a particular type of elevation pattern, which has square cosecant characteristic.
    本文在对目前MIMO 天线领域的研究动态进行概述的基础上，结合基站的自身特点，提出并实现了一种新型的基站极化分集波束赋形天线阵列，其阵元为平面印刷偶极子，阵列在俯仰面形成类似平方余割形式的方向图分布。

2. A kind of best baffle-beard suitable for applications in the dual-frequency base station antenna is presented, meanwhile, we adopt the PSO algorithm to optimize the parameters affecting antenna pattern such as the phase of the elements, the space between the elements, such that the pattern of antenna can be shaped in the vertical plane （the pattern in the vertical plane has Cosecant beam in the service area）.
    针对我国移动通信频率，以基站天线的双频工作以及阵列波束赋形为目标，设计了一种满足基站天线双频辐射要求的最佳反射板形状，并通过PSO全局优化算法优化各单元馈电相位并调整其间距以实现垂直面方向图双频波束赋形的目的（即垂直面方向图在所覆盖的服务区域内具有余割波束）。

3. The inspection method of cosecant beam antenna is discussed in depth in this paper.
    对余割波束天线的检测方法进行了较深入的探讨。

4. 911查询·英语单词

4. The research on inspection method of cosecant beam antenna
    余割波束天线检测方法的研究

5. The results of flat-top wave beam and cosecant square wave beam, which are gained using this method, are fairly good, testifying this method is effective in beam shaping of conformal arrays.
    运用此方法得到共形圆柱阵列的平顶波束和余割平方波束方向图，效果较好，证明此方法对于共形阵列是有效的。

6. A kind of singular integral equations of convolution type with variable coefficient and cosecant kernel
    一类具有变系数和余割核奇异积分的卷积型方程的求解

7. Discussion about Cosecant-Squared Lens Antenna
    关于余割平方透镜天线的探讨

8. The concept of extra cosecant square antenna is described in this paper. The analysis and computational formulas of doubly curved reflector antenna with shaped beam are conducted in all details. The computing software diagram, designing method, the computational and practical results are also given.
    介绍了超余割平方天线的概念，详细推导了双弯曲反射面赋形波束天线的分析、计算公式、计算软件框图、设计方法以及针对某一天线方向图的计算和实测结果。

9. As the inversion problem for singular integrals with cosecant kernel usually has no solution in case of index k < 0, we proposed and solved two different new forms of modified inversion problem in this paper.
    针对含余割核奇异积分反演问题在指标k<0时一般无解的情况，本文提出并求解了两种修改的反演问题。

10. cosecant是什么意思

10. So the value of array invariant is the key point of passive source ranging, which can be gotten by the derivative of the arriving time against the corresponding cosecant function of elevation angle. Second, the concept of generalized array invariant is proposed.
    阵不变量的提取是被动测距的关键，它可通过提取信号到达时间对应的简正波俯仰角余割值进行计算。二、提出了广义阵不变量的概念。

11. cosecant

11. Modification of the Inversion Problem for Singular Integrals with Cosecant Kernel
      含余割核奇异积分修改的反演问题

12. Value of the complement of the secant, called the cosecant.
      正割函数的倒数，称为余割函数。

13. The value, y, of the inverse function to cosecant at argument x.
      余割函数的反函数。

1. ratio of the hypotenuse to the opposite side of a right-angled triangle

    Synonym: cosec