查询词典 closed system

So in order to improve ROP, the VTK vertical drilling technology of Baker Hughes was introduced. VTK is a kind of closed loop, automatic, and vertical drilling technology, made up of closed loop rotary steering drilling system AUTOTRAK, high-performance X-TREME motor and reliable MWD. It is able to return the well path back to vertical by adopting downhole microprocessors to analyze the measured deviation data and determine the proper force necessary for decreasing the deviation angle to guide the steering rib at the high-side to reliably stick out against the upper wellbore.

为提高机械钻速，引进贝克休斯的VTK垂直钻井技术，它是由AUTOTRAK、高性能X-TREME马达、可靠的MWD三种技术开发出来的一种闭环自动垂直钻井技术，能够根据井眼的偏斜，经井下微处理器分析判断，使导向稳定地靠近井眼高边方向导向肋板伸出顶向上井壁，这样使钻头产生合理的降斜力，从而使井眼回到垂直轨道上来。

Combining with the first domestic closed yard coal wharf coal silos (the planning design object of Tianjing Shenhua closed yard coal wharf second stage engineering), this thesis performs a profound research. It mainly includes the follows: Firstly, it illustrates the basic constitutes and operational processes of the coal wharf logistics system.

结合拟建设的我国首个圆筒仓封闭式煤炭码头——神华天津煤炭码头二期工程的规划设计项目，本文展开了深入研究，主要内容如下：首先，阐述并分析了煤炭码头物流系统的基本组成和工艺流程。

Direct current motor has the characters of rapid response, high precision, great efficiency, heavy load ability and excellent controlling performance, so it is applied into all kinds of closed loop and half-closed loop control system.

直流电机由于具有响应迅速、精度和效率高、调速范围宽、负载能力大、控制性能优良等特点，被广泛应用于各类闭环和半闭环控制系统中。

Automotive snorkels Mei-called cantilever handling devices, referred to the end of car plate; Tipper roof closed system known as dump trucks cap, dump trucks automatically open the cap, is all over urban management and sanitation sector in order to improve the region The urban environment, and regulate the transport and Zhatu Daofang, in particular to ask the soil transport vehicles to install the closed roof; regulating cargo storage warehouse known as the Taiwan-conditioning, hydraulic boarding palanquin, the goal is to regulate the storage bed The high level reached with the different types of cargo compartment of a smooth convergence to facilitate loading and unloading; fixed-take-off and landing platform known as shear platform, is a goods from low to high or the removal from height moving to lower the hydraulic Auxiliary handling machinery.

汽车液压升降尾板又叫悬臂式装卸装置，简称汽车尾板；自卸车顶盖密闭系统又叫泥头车顶盖、泥头车自动开启盖，是各地城管和环卫部门为了改善本地区的城市环境，规范渣土的运输与倒放，特别地要求泥土运输车辆必须安装的密闭式顶盖；仓库调节货台又叫仓库调节板、液压登车轿，目的是通过调节仓库货台的高度达到与各类高低不同的货运车厢的顺利衔接，方便装卸；固定式升降平台又叫剪式平台，是一种将货物从低处搬运至高处或从高处搬运至低处的液压式辅助搬运机械。

At present, the class teaching in some higher vocational colleges are in the self-closed or half self-closed state. Some researchers pay attention to the quality of teachers, but ignore the contrast system of quality evaluation based on social demands; Pay close attention to learners participant-learning, but the participation confined teachers and students in class; Pay close attention to activity norm of class teaching, but the norm is far from the social standard.

目前，有些职院的课堂教学处在一种自闭与半自闭的状态，有些研究者关注教学主体的素质，都忽视把社会需求作为素质评价参照系统；关注学习主体的参与型学习，这种参与却局限于课堂内的师生；关注课堂教学的活动规范，这种规范都与社会现实准则相去甚远。

Specializes in closed-circuit television monitoring systems, access control time and attendance system, the public address system, the Group of the telephone system, computer network system sales and installation.

专业从事闭路电视监控系统、门禁考勤系统、公共广播系统、集团电话系统、计算机网络系统的销售与安装。

By using the multi-year series of the circulation indices P and C for the closed pressure system on the unit radius spherical surface,three characteristic quantities of annual system centers(around the climatological center C-) are defined.1Average distance r,which is defined as the weighted geometric average distance of the annual system centers C deviating from the climatological center C-(i.e.the center location anomaly C′),is a measurement for distribution area of the system...

用单位半径球面上闭合气压系统环流指数P、C的多年序列，构造了历年系统中心在C-周围分布的3个特征量：1平均距离r，它定义为历年系统中心C偏离于气候中心C-的权重几何平均距离，是系统中心分布区域大小的度量；2压缩系数μ，它描述了历年系统中心分布区域偏离于圆形的程度，是历年系统中心位置分布各向异性的度量；3极大异常方向β，它用系统中心极大异常偏离-C处正东方向的角度，给出了系统中心的主要异常方向。

By comparing the open-loop control system, closed-loop control system and mixed-loop control system, the paper drew a conclusion that the new control system could shorten the blind area, eliminate the dead area, and autolevel cotton sliver twice.

通过比较开环、闭环和混合环控制系统认为，该控制系统能够缩短盲区，消除死区，并能2次匀整条干。

The solution for the non-stationary system is obtained through the stationary disturbed system. The gradients of the system performances to all design variables are derived and they can be used to obtain optimal solution of the systems. More generally, if the performance of the system is a function of the solution of a set of generalized Lyapunov equation, then the gradients of the performance function to the coefficient matrices of the equation can be found in closed form.

文中显示，非静态干扰系统的解可由静态干扰系统求得，而此干扰系统之最佳解，则经由本文所推导的对所有设计变数之系统性能函数梯度获得；一般而言，如果系统之性能函数是一组通式化 Lyapunov 方程式解的函数，则此方程式的系数矩阵之性能函数梯度，可用封闭解表示之。

The simulation of the vector control system for rotor flux orientation is studied in this paper. The modeling and simulation of the vector control system of speed and flux closed-loop with the torque inside loop are completed by applying electrical principles and the toolbox of Simulink and Power System in the Matlab software. The paper mainly introduces the modeling of the speed adjustment system and the setting of parameters of the controller. The obtained results of the simulation are close to actual situation, which proves the correctness of the modeling.

文章对按转子磁链定向的矢量调速系统进行了计算机仿真研究，运用Matlab的Simulink和Power System工具箱及面向系统电气原理结构图的仿真方法，实现了带转矩内环的转速、磁链闭环矢量控制系统的建模与仿真；重点介绍了调速系统的建模和调节器参数的设置，给出了矢量交流调速系统的仿真模型和仿真结果，仿真结果非常接近实际情况，说明了仿真模型的正确性。

In the days of sailing vessels the crew were afraid they would be becalmed on the ocean.

在使用帆船的时代，船员们担心他们会因为无风而无法在海洋上航行。

As long as foreign donors pay the PA's salary bill, few expect a new intifada.

只要外国继续为巴权力机构的薪水买单，希望发动新暴动的人便寥寥无几。