旋开

The chaotic planar motion of rigid spacecraft on an elliptic orbit in the gravitational field with air drag and internal damping and its control are investigated.

研究万有引力场中受大气阻力且存在结构内阻尼的非自旋航天器在椭圆轨道上平面天平动的混沌及其参数开闭环控制问题。

The experiment results prove that the boiler coking is largely reduced and the temperature difference of two sides of horizontal gas-pass is very small, when the 330MW boiler operate, the pressure of primary hot air parison is controlled beyond 12.0～12.5KPa, the O2 content of air pheheater is controlled about 3.0%, the door of OFA is opened to 30%, the buffle of the inner secondary air sleeve is adjusted to the minimum, the outer secondary air swirling strength and the baffle of the outer secondary air sleeve is regulated to the maximum and the outlet temperature of pulvervised mill is kept in 70℃.

试验结果表明，330MW运行时，一次热风母管压力控制在12.0～12.5kPa以上、空气预热器实际氧量控制在3.0％左右、燃尽风门开至30％、内二次风量套筒挡板调整在最小、外二次旋流强度和外二次风套筒挡板调整到最大、磨煤机出口温度维持在70℃，此时锅炉结焦大幅度减轻，水平烟道两侧烟温差非常小。优化试验完成后，进行了单烧灵武烟煤对比，结果是：掺烧高灰熔点的银北煤后，炉膛结焦大幅度减轻，锅炉过热器减温水量较小，主蒸汽压力易提高，带负荷能力正常；再热器烟气挡板开度较大、减温水量较小；风机电耗较小。

Based on the analysis of the key components of disc ditcher, the maximum lift height of the rotary blade shaft and the minimum size of the elevating device as the objective functions were introduced to establish a nonlinear mathematical model satisfiable to multiple constraint conditions of mechanical structure and agronomic demands.

为了解决圆盘开沟机在下地、过梗、爬坡过程中出现的旋耕刀易破损、刀盘支架易变形等问题，通过对其关键部件的分析研究，以刀盘轴最大提升高度和升降装置最小尺寸为目标函数建立数学模型；用Matlab软件对其结构尺寸进行参数优化。

Lid done with stainless steel plate floor, built-silicate insulation, Furnace Door size 350 mm wide, 580 mm high, the overall lateral wall elevate electric holding furnace door, Furnace Door closure of the Furnace Door as a whole round , Furnace Door sealing performance enhancements, dial made of stainless steel by 1600 m / m turntable, used to load the workpiece, the entire wheel of the plane is not division, the operator can be stacked workpiece, as dial-rotation every 40 minutes a week , when the operator can not see dial in almost rotation, and Furnace Door open the larger operators can be arbitrary and out of the workpiece, and without time limits can dial in 20-60 minutes a week to arbitrary rotation speed, regardless of Furnace Door hoist, from the start of work on the dial continuous rotation, and there was no need for chain hoist Furnace Door, the need to stop rotating, just press the control cabinet, stop button, the gate Furnace Door, operators to seize its own, activated installed in the furnace door open and close button.

炉盖采用不锈钢板做底板，内置硅酸铝保温，炉门尺寸宽350mm，高580mm，侧墙体中整体向上提升式电动保温炉门，炉门关闭时整个炉门为一个圆形整体，炉门密封性能增强，转盘采用不绣钢制成1600m/m转盘，用以承载工件之用，整个转盘为平面不分工位，操作人员可以任意堆放工件，由于转盘每40分钟旋传一周，工作时操作人员几乎看不到转盘在转动，加上炉门开的较大，操作人员可以任意进出工件，而不受时间限转盘可以在20--60分钟旋转一周的时间任意调速，不论炉门启闭、转盘从启动工作就不间断的旋转，没有任何必要与炉门启闭进行联锁，需要停止旋转时，只需按下控制电柜上的停止按钮即可，炉门的启闭，由操作人员自行掌握，按动安装在炉门边的启闭钮即可。

The helicopter is pirouetting fly the helicopter in a Figure of Eight to the right.

在降落区的上空将直升机保持停悬，机体以顺时针的方向保持自旋，并且朝右侧开

The main products are multi-functional farm administering machine, sowing fertilizer, ditching machine, it can be used in large shed,paddy field,or chard,grapery,terrace,slopping field and flat.it have more function,such as:cultivation,deep ploughing,uprooting,the grass,spraying pe- sticide,fertilization,irrigation and earth up and,ect.

产品集众家之长，结构紧凑，性能优良，操作简便灵活，行走平稳，适应于山地、丘陵、果园、菜地、大棚以及各种小行距农作物的的各种管理作业；产品具有旋耕、开沟、培土、锄草、保墒、施肥、播种等多项功能。

Heisenberg XX open chain is very important in the study of quantum state transition.

Heisenberg 开链对研究量子态在自旋链上的传递有重要的意义。

Cordoba opened the scoring with Inter's fastest goal of the season in the second minute, slotting a loose ball past Pavarini after the Reggina keeper punched clear a Veron inswinger.

科尔多瓦第2分钟时为球队首开记录，在雷吉纳门将帕瓦里尼扑出贝隆的内旋传中球脱手之后，科尔多瓦捡漏将球打入球门，这也是球队本赛季的最快进球。

Suddenly she flitted across the room, leant over the square table, and switched on the electric fan. She turned her back to the wind, and wheedled, Why don't you use the electric fan, Daddy?

忽然她转身飞跑到厢房的前半间，扑到方桌旁边，一手扭开了小风扇的开关，又一旋身把背脊对住那风扇，娇憨地又叫道：嗳，怎么不开风扇呢！

This machine is suitable for opening the hole in the head of plastic or aluminum-plastic Laminated tube which is hermetic, and sealing the hole with aluminum foil, then capping the tube finally. It includes three functions together. This machine is an ideal machine for the tube manufacture plants.

软管开孔封口旋盖机是将塑料软管、铝塑复合软管的头部密封的塑料开孔，然后采用铝箔封口、自动拧上帽盖，三种功能合一的机器。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。