predetermined orientation

predetermined orientation的基本解释

-

预定取向

与predetermined orientation相关的网络例句 [注：此内容来源于网络，仅供参考]

This paper presents a nonlinear analysis of the stresses in jointed rocks around a subterranean structure by the initial stress method. In this analysis, rocks with a parallel set of joints of a given predetermined orientation are idealized as a stratified. material with no shear between the strata j and rocks with a random set of joints are idealized as a tensionless material.

本文将具有一组定向节理的岩体理想化为层面不抗剪材料，将具有随机分布节理的岩体理想化为不抗张材料，采用初应力法，对节理岩体内地下工程围岩应力做有限元非线性分析，编制了通用程序，并根据某水封石洞油库的实际参数作了算例。

To further elucidate the mechanism of BMP in regulating cell differentiation and to provide basis for BMP gene therapy, this study centers on the effects of BMP2 gene transfection on fibroblasts and contains the following works:① A 1.2kb fragment containing full length human BMP2 coding region was inserted into pBK-CMV (expressed both in protocaryon and eukaryon) by using predetermined orientation methods, resulting in phagemid expression vector for BMP2 (pBK-B2).② pBK-B2 was transfected into NIH3T3 cells by using LipofectAMINE.

为了进一步从分子水平探讨BMP对细胞分化的调控作用，并为BMP基因疗法的建立提供依据，本实验围绕BMP2基因转染对成纤维细胞的生物学作用进行了以下几个方面的工作：①将含有人BMP2全长编码序列的基因片段(1.2kb)定向克隆于噬菌粒表达载体pBK-CMV中，成功构建了人BMP2噬菌粒表达载体pBK-B2。

What's more, a special locating and measuring equipment is designed according to the characteristics of the pneumatic percussive steerable mole, which is minisized and able to stand strong impact. By using it, the mole can be monitored during construction. By comparing the actual path to the predetermined path, the construction path of the mole can be controlled. The steering equipment comprises a steering tool and flexible pipes. It can implement different path construction and deviation correction of the mole through applying a steering torque to the mole to change its working configuration and the orientation of the steering head slant face and make the mole advance according to the predetermined path.

此外，针对气动冲击式轨迹可控穿孔机的施工特点，还专门设计了微型化和抗冲击的定位测量系统，以实现在施工过程中对穿孔机的监测，其测得的穿孔机实际运行轨迹用于和设计轨迹进行比较，作为对穿孔机施工轨迹进行控制的依据；以及由控向机构和挠性杆组成的控向系统，其作用是通过施加控向扭矩于穿孔机来改变穿孔机的工作模式及导向穿孔头斜面的朝向，从而实现不同性质轨迹施工和偏离修正，保证穿孔机尽可能按照设计轨迹进行施工。