系统盘

Rotating disks are the basic mechanical element of steam and gas turbines, grinding wheels, circular saws, and computer disk memories.

旋转圆盘是工业中应用广泛的一种基本机械元件，它广泛的应用于旋转机械，诸如涡轮机、圆锯、计算机硬盘等，上述系统中这些盘类结构严重的横向振动将使机器工作时的精度降低﹑动态性能下降以及造成被加工材料的浪费，严重时甚至使圆盘元件损坏。

Because any reports on the active control of rotating disk haven't be seen in China up to now, and this experiment research is important, so the complete set of active control system of rotating disk are built independently. The push-pull type electromagnet is applied to control the vibration of the circular disk. The power amplifier circuit that can respond to wide scope in frequency from DC to AC is designed by improving the existing circuit. The sensor signal is first low-pass filtered, then the proportional control plus the differential control circuit easy used in practice are applied to finish the more effective control. The electromagnetism shield is used as possible to decrease the signal disturbance from the electromagnet to eddy sensor.

考虑到目前国内尚未见到有关旋转圆盘振动主动控制的相关报导以及实验的重要性，自行设计制作了一整套旋转圆盘振动主动控制系统：提出并采用推拉型电磁作动器来控制圆盘的振动；在改进现有电路的基础上，自行设计了具有较理想特性的驱动电磁作动器的功率放大器；根据实际控制环境的特点，设计了先进行低通滤波，再采用比例和实用的近似微分电路构成的控制器，并采用了电磁屏蔽来减小电磁铁对传感器的干扰，以实现更有效的控制。

Rotating disks are the basic mechanical element of steam and gas turbines, grinding wheels, circular saws, and computer disk memories. Large amplitude transverse vibration of rotating disks can cause failure of turbine wheels due to wheel-case contact, cutting inaccuracy for grinding wheels and circular saws, the waste in material and head-tracking errors in computer disk memories.

旋转圆盘是工业中应用广泛的一种基本机械元件，它广泛的应用于旋转机械，诸如涡轮机、圆锯、计算机硬盘等，上述系统中这些盘类结构严重的横向振动将使机器工作时的精度降低、动态性能下降以及造成被加工材料的浪费，严重时甚至使圆盘元件损坏。

By considering torque characteristics of variable-frequency motors and mesh stiffness as well as backlash nonlinearity in gear transmission,a dynamics model for the cutting system of shield tunneling machine with redundant drives was established. The fluctuation characteristics of torque loads and dynamic cutterhead driving torque in composite strata were analyzed.

复合地层掘进扭矩载荷突变是造成盾构机掘进过程中堵转停机的直接原因，考虑盾构机刀盘驱动变频调速电机特性、转矩传递过程中齿轮啮合刚度及齿侧间隙等非线性因素，建立冗余驱动的盾构机刀盘切削系统机电耦合动力学模型；针对典型复合地层地质条件，对盾构机在上软下硬地层掘进过程中刀盘驱动转矩动态特性进行仿真分析。

P moves you up to the parent directory and the button with the dash maintains a list of recently used paths. On Windows operating systems, the button also contains a list of all drives (C:, D:, etc).

左上角有个按钮，用它可以移动到上一级目录，它下面的按钮则记录了最近访问过的目录，如果是在Windows系统下，这个按钮还包含了所有的盘符，比如C盘、D盘等等。

This effect is sometimes seen in reel-to-reel systems, where the pull on a reel is greater than the speed at which it unwinds so the remaining tape, or other material, slips and becomes very tightly packed.

这种状况常见于卷盘到卷盘系统，卷盘卷起的速度比展开的速度快，因此剩余磁带或其他物质发生滑动，包裹得越来越紧。

Option One: a multi-polar set of ordinary water pipe installation balancing valve hole ① in charge of water pipe line and the 20-hole HVAC balancing valves installed ② Install a balancing valve in the shaft exit ③ air box installed in each balancing valve ④ In each of the tenants on the installation of balancing valve outlet Option Two: Using the Dynamic Balance valve ① fan coil unit installed in the end of the balancing valve ② air-condition the box at the end of the balancing valve is installed After the economic comparison, the final adoption of the balance valve program ① air box end of the installation of balancing valve and the automatic control valve ② retail and office space within the District, a combination of two or three fan coil balancing valves and automatic control valves, each fan coil outside the district office for personal use of a balance valve and automatic control valve 3, balance valve application summary ① long pipeline DRS installation of large multi-level system price higher than the end of the normal balance valve device a dynamic balance valve.

方案一：多极设置普通水管井间安装平衡阀①在主管线与20个暖通水管井间安装平衡阀②在竖井出口位置安装平衡阀③在每个空调箱上安装平衡阀④在每个租户的出水口上安装平衡阀方案二：使用动态平衡阀①在末端装置风机盘管上安装平衡阀②在末端装置空调箱上安装平衡阀经过经济比较，最终采纳的平衡阀方案是①空调箱末端安装平衡阀及自控阀②零售和内区写字楼两或三个风机盘管合用一个平衡阀及自控阀，外区写字楼每个风机盘管自用一个平衡阀及自控阀 3、平衡阀应用总结①长管线异程大系统多级安装普通平衡阀价格高于末端设备一级动态平衡阀。

Option One: a multi-polar set of ordinary water pipe installation balancing valve hole ① in charge of water line and the 20-hole HVAC balancing valves installed ② Install a balancing valve in the shaft exit ③ air box installed in each balancing valve ④ In each of the tenants on the installation of balancing valve outlet Option Two: Using the Dynamic Balance valve ① fan coil unit installed in the end of the balancing valve ② air-condition the box at the end of the balancing valve is installed After the economic comparison, the final adoption of the balance valve program ① air box end of the installation of balancing valve and the automatic control valve ② retail and office space within the District, a combination of two or three fan coil valves Valves and Controls, for personal use outside the district office for each fan coil unit and automatic control valve of a balance valve 3, balance valve application summary ① long pipeline DRS installation of large multi-level system price higher than the end of the normal balance valve device a dynamic balance valve.

方案一：安全阀多极设置普通水管井间安装平衡阀①在主管线与20个暖通水管井间安装平衡阀②在竖井出口位置安装平衡阀③在每个空调箱上安装平衡阀④在每个租户的出水口上安装平衡阀方案二：使用动态平衡阀①在末端装置风机盘管上安装平衡阀②在末端装置空调箱上安装平衡阀经过经济比较，最终采纳的平衡阀方案是①空调箱末端安装平衡阀及自控阀②零售和内区写字楼两或三个风机盘管合用一个平衡阀及自控阀，外区写字楼每个风机盘管自用一个平衡阀及自控阀 3、平衡阀应用总结①长管线异程大系统多级安装普通平衡阀价格高于末端设备一级动态平衡阀。

This design is the Guangzhou lan west 100 markets summer the central air-conditioning system design, the primary mission completes one, two, three, four buildings load computation; Air-conditioning system plan efficient analysis and water unit's shaping; The air-conditioning system freezing stands design; Four buildings shopping area air conditioning unit's shaping, wind system and aqueous system design; Four buildings work area air blower plate tube system design; And has drawn up four winds tubes floor-plan, the wind side chart, the engine room floor-plan, the aqueous system axis side chart.

本次设计课题是广州市蘭西一百商场夏季中央空调系统设计，主要任务是完成一、二、三、四楼的冷负荷计算；空调系统方案的经济性分析和制冷机组的选型；空调系统冷冻站的设计；四楼购物区空调机组的选型，风系统和水系统的设计；四楼办公区风机盘管系统的设计；并绘制了四层风管平面布置图、风管轴侧图、机房平面布置图，水系统轴侧图。

The reliability of single-disk, double-disks, multi-disks failure, and the system with redundant hardware are analyzed and calculated.

5分别对单个磁盘驱动器的可靠性、RAID-O级的可靠性、单盘失效、双盘失效、多盘失效以及加冗余支持硬件的系统的可靠性进行了分析和计算。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。