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Correlation of drillability anisotropy index of the roller cone bit and PDC bit, the difference between drillability of the roller cone bit in perpendicular and horizontal directions of the bedding plane with the P-wave velocity anisotropy coefficient are studied respectively by means of mathematical statistics. A mathematical model is established for predicting drillability anisotropy index by using P-wave velocity anisotropy coefficient.

用数理统计方法研究分析了牙轮钻头岩石可钻性各向异性指数、牙轮钻头垂直于和平行于地层层面方向岩石可钻性差值和PDC钻头岩石可钻性各向异性指数与纵波波速各向异性系数的相关关系，建立了用纵波波速各向异性系数评价地层可钻性各向异性的模型。

I need directions to the Beihai Park.

我想知道北海公园的方向。

The observations of the plume imply that Betelgeuse is not shedding mass evenly in all directions.

观测到羽状气体说明参宿四并不是在各方面均衡瘦身。

Edward: No! I want to find Beverly Hills, could you give me the directions?

爱德华：不是的，我想去比华利山，能告诉我怎么走吗？

No, I wanna find Beverly Hills. Can you give me directions?

不，我在找比佛利山，你能告诉我怎么走吗？

E : No, I wanna find Beverly Hills, can you give me directions ?

爱：不。我要找比华利山，你能给我指指方向吗？

EDWARD: No, I wanna find Beverly Hills, can you give me directions?

不。我要找比华利山，你能给我指指方向吗？

A local bicyclist shrugged when I asked him for directions.

当地自行车耸耸肩当我问他的方向。

One who is biddable follows directions or obeys commands

一个 briddable 的人服从命令或听从指挥

Owing to the anisotropic and the biharmonic nature of microwave radar backscatter on spaceborne scatterometer, moreover, scatter model function nonlinear and the existence of various noise sources in the measurements in addition to the model function, the retrieval wind results consist of as many as four wind directions.

摘 要 由于卫星散射计探视雷达回波的各向异性的双调和性质，同时由于散射物理模型函数的非线性及信号中存在噪声，使得常规点方式风场反演中风向有多至4个解的多解存在。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。