查询词典 array pitch

In chapter two, this paper has made and explained operation course, the definition of the security investment fund and net value computing technology of the security investment fund at first; this paper uses time the analytical method of the array to analyse the array of net value of the fund, divide which into secular trend array , season index array , circulation fluctuate index array and random fluctuate index array and analyse them respectively.

在第二章，本文首先对证券投资基金的运作过程、证券投资基金的定义及净值的计算方法作了阐述，随后本文运用时间序列分析方法对基金净值序列进行分析，将其分解为长期趋势序列、季节指数序列、循环波动指数序列和随机波动指数序列并分别对其进行分析。

The array chip takes a flexible transparent polyimide thin membrane as the base, the lower surface can form a cross comb-shaped array multimicroelectrode, the electrode group is composed of two comb-shaped microelectrode array electrodes which are mutually crossed but not contacted with the electrical structures not being connected, and the microchannel between the both internal electrodes of the electrode group serves as the service passage; the array chip is inversely buckled on the fusion pool, and the cross comb-shaped array multimicroelectrode on the array chip correspondes to the cell electric fusion pool and falls in the cell electric fusion pool.

阵列芯片以柔性透明聚酰亚胺薄膜为基底，下表面通过蚀刻形成交叉梳状阵列化微电极组，电极组由两个相互交叉、互不接触、电气结构上互不连接的梳状微电极阵列电极构成，电极组内部微电极之间的微通道为工作通道；阵列芯片倒扣于融合池上，其上的交叉梳状阵列化微电极组与细胞电融合池相对应，落于细胞电融合池中。

Conceptually, the most obvious sample point within a fundamental period is often referred to as the pitch mark. Usually pitch marks are selected as the local maxima or minima of the audio waveform. In the previous example of pitch determination for the tuning fork, we used two pitch marks that are local maxima. On the other hand, in the example of pitch determination for human speech, we used two pitch marks that are local minima instead since they are more obvious than local maxima.

在观察音讯波形时，每一个基本周期的开始点，我们称为「音高基准点」（Pitch Marks，简称 PM），PM 大部分是波形的局部最大点或最小点，例如在上述音叉的范例中，我们抓取的两个 PM 是局部最大点，而在我的声音的范例中，由於 PM 在局部最大点并不明显，因此我们抓取了两个局部最小点的 PM 来计算音高。

The proposed receiver-based PLC method detects the pitch lengths of the waveform in the two sides, determines the number of pitch cycles and pitch lenghts to be placed into the lost packet, and interpolates the pitch waveforms from the two sides to synthesize pitch waveforms. This method is called Time-Proportion Based Pitch-Waveform Interpolation. When compared with other waveform reconstruction methods, e.g.

本论文提出的接收端补偿方法，首先会去侦测遗失封包的前一个与后一个封包内的基周长度，接著决定重建出的基周在遗失封包内需要布放的个数与个别长度，最后内差出各个基周的波形，此方法我们称之为时间比例式基周波形内差法。

First, based on phased array antenna's mono-pulse goniometry and separate coordinate technology about phase control, the antenna beam pointing error formula, caused by phase quantization error, is derived from linear array and circular array to planar array and cylindrical array.

首先以单脉冲相控阵天线测角原理为基本理论出发点，利用相位控制的坐标分离技术，基于线阵、圆形阵等简单形式的相控阵天线，推导了平面阵、圆柱面阵等相控阵天线由相位量化误差引起的波束指向误差公式。

By time-varying filtering, we realize the signal selectivity and interference suppression, especially for the signals with time-varying power spectrum. It is shown herein that conventional eigenstructure based methods are lower dimensional special case of the time-frequency subspace fitting method. The closed-form array response estimation algorithms for blind source separation in wireless communication is also developed in the dissertation by exploiting the data structure of second-order statistics of the array output in the presence of multipath. The proposed method achieves array response estimation with little constraint on signal property and propagation environment such as scatters or angular spread. Moreover, the array utilized here can be of arbitrary geometry and even uncalibrated. Since the closed-form solution is obtained, no misconvergency may occur and large amount of computation can be saved. The equivalent feed model and corresponding optimization designation are proposed to realize the downlink multi-user selective transmission. By coherent and non-coherent superposition of the electromagnetical field, multiple beams can be formed using a single array, so that each co-channel user signal is transmitted in each beam and will not interfered with each other. The proposed system scheme implements the digital beamforming and the channel allocation in the base band, therefore is suitable for the utilization of the radio software technology. The feasibility and effectiveness of the proposed model are proved by the RF experiment.

在窄带条件下，GSC－SSF方法还可以提高阵列的虚拟孔径，从而提高估计的性能；可以证明，Cyclic DOA 和SC-SSF方法可看作该方法的特例或近似； 3、提出了二维GSC－SSF方法和宽带谱相关DOA矩阵方法，利用信号的循环平稳特性解决了宽带条件下二维 DOA 估计问题，并具有阵元数少、计算量较小的特点； 4、提出了时频子空间拟合和宽带时频DOA估计算法，将联合时频分析的理论和方法引入到阵列信号的空间谱估计研究中，利用时变滤波实现信号选择性测向和干扰抑制，特别适合于谱时变信号；可以证明传统特征结构法可看作是时频子空间拟合方法的特例； 5、提出了多用户环境下阵列响应的估计方法——CARE方法，该方法对信号结构和传播参数（主要是散射源分布与角度散布）的约束较少，适用于各种几何结构的阵列甚至未校准的阵列，能够直接得到阵列响应的闭式解，因此计算量小、稳健性好，不存在收敛问题； 6、提出了针对多用户下行选择性发送的阵列等效激励模型、优化设计方法及其系统实现方案，通过空间场的相干叠加与非相干叠加使得单一阵列能够形成多个波束，并保证各波束内的用户信号各不相同且相互干扰最小；其系统方案具有在基带实现数字波束成形、信道分配并便于软件无线电实现的特点，其有效性已得到外场实测数据的证实。

The relationships among perfect punctured binary array pair, quasi-perfect and double quasi-perfect punctured binary array pair is presented. Specially, when first and second dimension period of the punctured binary array pair are odd, the perfect punctured binary array pair, quasi-perfect and double quasi-perfect punctured binary array are able to change each other.

定义了准最佳屏蔽二进阵列偶和双准最佳屏蔽二进阵列偶，研究了它们的变换性质和频谱特性，给出了它们存在的组合允许条件，利用这些组合允许条件，有效地搜索出若干准最佳屏蔽二进阵列偶和双准最佳屏蔽二进阵列偶。

Tooth Proportions.—There are 17 pitches: 2.5/5, 3/6, 4/8, 5/10, 6/12, 8/16, 10/20, 12/24, 16/32, 20/40, 24/48, 32/64, 40/80, 48/96, 64/128, 80/160, and 128/256. The numerator in this fractional designation is known as the diametral pitch and controls the pitch diameter; the denominator, which is always double the numerator, is known as the stub pitch and controls the tooth depth. For convenience in calculation, only the numerator is used in the formulas given and is designated as P. Diametral pitch, as in gears, means the number of teeth per inch of pitch diameter.

齿比——一共有17种齿比：2.5/5，3/6，4/8，5/10，6/12，8/16，10/20，12/24，16/32，20/40，24/48，32/64，40/80，48/96，64/128，80/160和128/256在这一系列的分数中的分子是径节，径节的大小决定了节圆的直径；而分数中的分母通常是分子的两倍，分母是残余径节，它的作用是控制齿槽的深度为了方便计算，在所有的公式中都使用分子作为计算参数，并且与齿轮的表示方式一样定义为径节P尺寸，也就是在节圆上，每英寸长度上的齿数

On the basis of array model of the Multiple-Input Multiple-Output radar, a universal array model of the Synthetic Impulse and Aperture Radar is constructed and a realization sheme for microwave SIAR with a thinned subarray set for the transmitted array and a dense subarray set for the received array is proposed.

结合MIMO雷达多发多收的特点，建立了微波综合脉冲孔径雷达的阵列模型，并提出该阵列的一种实现方案：发射阵采用稀布子阵集，接收阵采用密布子阵的形式。

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A carrier gas such as nitrogen is directed through line 20 and valve 22 to connect with line 26 and mix with the gas sample.

如氮气之类的载体通过管线20和阀22引入，与管线26相通，与气体样品混合。

But for the most part, knaves and parasites had the command of his fortune

然而支配他的家产的大多是恶棍和寄生虫。