dwd

Application of Subsize Wireless Directional While Drilling ( DWD) Apparatus in Short-radius and Deep Sidetracking Horizontal Wells

小尺寸无线随钻测量仪器DWD在深侧钻短半径水平井中的应用

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The component and characteristic of the software system of LDWD are introduced.

介绍了激光直写设备(LDWD)的软件系统的组成要求与特点.

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Blazed grating based WDM device is one kind of potential one in DWDM technology.

而闪耀光栅型DWDM是一种很有发展潜力的密集波分复用器件.

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The discrete Wigner distribution ( DWD) is a two dimensional representation of a signal in discrete time dimension and discrete frequency dimension.

离散Wigner分布（DWD）是信号在离散时域和离散频域上的二维表示。

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This article introduces the structure of DWDM networks and some applications of fiber Bragg grating.

介绍了DWDM网络的结构特点以及光纤光栅在其中的一些应用.

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The successful application of DWD in the short-radius deep sidetracking of horizontal wells in Taha region provides an effective way for reducing the cost of short radius horizontal well drilling, improving the operation efficiency, eliminating the operational risks, it is worthy to be introduced in oilfields.

DWD在塔河地区深侧钻短半径水平井中的成功应用，为短半径水平井降低施工成本、提高施工效率、回避施工风险找到了一条有效的途径，具有一定的推广应用价值。

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This paper applied three joint time frequency analysis ( JTFA) methods to a surface discharge signal in oil, i.e., Short time Fourier transformation ( STFT) based spectrogram, Wigner distribution ( DWD) and Gabor spectrogram ( DGS).

将短时傅立叶变换谱、Wigner分布及Gabor谱等3种联合时频分析方法应用于离散时间域，分析并处理了油中沿面放电波形。

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