可转动的

Through the characteristic parameters, the system's real-time moment of inertia is given. Then golden section adaptive control law and logic derivative control law both based on moment of inertia are designed. The two kind of control laws are combined to control the attitude of spacecraft and their simulation results are compared with the ones of PD control law which is designed based on the certainly-known system model. The results show that this adaptive control law is effective on the kind of time-variable system studied in this paper.

根据特征模型的参数推算了系统实时的转动惯量，设计了基于转动惯量的黄金分割自适应控制器和逻辑微分控制器，将这两种控制器相结合对带有可伸缩挠性附件的刚体进行姿态控制，仿真结果与基于确知系统模型所设计的变系数PD控制器相对照，表明了该自适应方法控制一类时变系统的有效性。

Explanation: This is perfect for outdoor exploration. Under the moisture environment, the fabric has outstanding moisture permeability. Also it is soft and wearable. The hat can be easily removed and adjusted. The double-ended zipper of oxter can rapidly discharge unnecessary heat from body. The inside coat is removable.

产品说明：此款适合户进行外探险运动；面料具有卓越的防水透湿性能，且在潮湿的环境里表现出良好的耐磨性和柔软性；可拆卸帽子，可全方位立体调节，更方便头部灵活运动，且转动不影响视线；腋下双头拉链设计能够迅速将体内多余热量排出；装有内置拉链，可自由安装或脱卸抓绒衣。

The research indicated that the main electric particles forming guiding discharge channel were the electrons released from the process of the breaking up of the negative ions. During 10 microseconds after the laser pulse, the electrode also could guide discharge effectively; and it suggested the new conception of the electrode erosion, and developed new-type running disk electrode, which could discharge for a million times in atmosphere. It also suggested methods of the texturing roller of besmearing with oil film and cathodal discharge in processing. The research of the texturing roller indicated that roughness of 14 microns and the intensified depth of over 200 microns could be got.

研究表明：形成诱导放电通道的带电粒子主要是负离子解离过程释放的电子，在激光脉冲结束后10微秒内，电极都能有效诱导放电；提出了电极损耗的新概念，并研制了新型转动圆盘电极，可在大气中完成上百万次放电，提出了加工过程中负极性放电、工件表面涂介质薄膜放电的毛化工艺方法；并用之对轧辊试件进行了毛化工艺研究，毛化粗糙度可达14微米，强化深度大于200微米。

Through Hilbert transform, a signal's plane trace can be get. There are two frequencies in the tested signal, so the signal's plane trace may be looked as the track of the out pole's end when two poles rotate around parallel axles. Using the knowledge of motion synthesis in theory mechanics, a formula to describing the change of plane trace's step length and angle for two-frequency be get. So we may prolongate the tested signal's plane trace from the echo's initial arriving moment, and get a certain length of the signal's prolongation.

通过Hilbert变换可得到测试信号的平面迹线，测试信号中只含有两个频率成分，视为双频信号，双频信号的平面迹线相当于两连杆绕平行轴转动时外杆杆端迹线，利用理论力学中运动合成和瞬心知识，推导出双频信号平面迹线步长平方满足余弦线性复合函数，而迹线转角可视为线性变化，据此可对回波到来之前的测试信号平面迹线作延长，得到一定长度的信号延展段，信号延展段与实测段作差可得到一次、二次回波的第一个波峰值。

In the transmission mechanism of optional drive ratio worm crank pin,the circular pitch of annulus worm changes from the function of optional drive ratio.When the annulus worm tums equably,the roll-pin crank brings shift tuming through joggling,and it can applly to dumping and turning mechanism of ladle.

变传动比蜗杆曲柄销式传动机构，其环面蜗杆的齿距是依变传动比的函数关系变化的，当环面蜗杆匀速转动时，通过啮合使滚销式曲柄产生预期的变速转动，可应用于铸造生产的铁水浇包的倾转机构。

In the impact feeling8.0N/m water cannot lay aside surpasses for 120 hours Cannot put inis loaded with the aqua fortis and in the strong sulfuric acid liquiddips After cannot achieve 10 minutes dangerous behaviors the chemicalreaction the detonation Cleanly washes using the clear water Lattercoolly does The product design has may transfer the size the livegrommet Finger when operation cuts through a revolution is thebedding bag is tight When does not operate So long as rotates thefinger about then may the automatic pine open the snare The safeconvenience is simple Pure natural not any to cancer chemistry dyeand chemistry pigment In the watery solution achieved the certaintime may change color the putrefication environmental protectionmaterial quality May pull outside the pulling force scope Thestandard general string YOYO ball string, the long ball string, theshaky ball string, slides the ball string.

单手冲力达到20kg的爱好者。3， 21stx12x2适合双手拉力达到50kg。可运行时间达3000小时。抗冲击力达到50kg每秒。最高时速3000公里。单手冲力达到40kg的爱好者。产品遇火即燃烧。熔点176.2oC生成热-573KJ/kg。爆热5343kj/kg。燃点180oC。冲击感度8.0N/m水中不能放置超过120小时。绝不能放入装有浓硝酸和浓硫酸的液体中浸洗。更不能达到10分钟之危险行为的化学反应后爆轰。清洁应用清水洗涤。后凉干。产品设计有可以调动大小的活绳圈。手指在操作时穿进一转即被套紧。如不操作时。只要把手指左右转动一下便可以自动松开圈套。安全方便简单。纯天然没有任何至癌的化学染料和化学色素。在水溶液中达到一定时间可变色腐化的环保材质。在拉力范围外可拉断。的标准通用绳子。

The feeding head can rotate around axial Z and axial X or Y. With the help of Siemens NC system, which can overcome the limitations of feeding heads working space, we can make axle sleeve and so on. It can be used to repair irregular shape products in laser cladding, such as metallic sheath. Using 3D coaxial feeding head, large area laser refabrication was carried out in metallic sheath.

由于原数控系统是非开放性的，不宜直接在原有系统上进行二次开发，考虑到现有条件，采用单片机控制二步进电机以实现送粉头能绕Z轴转动和绕水平轴转动，加上原有数控系统的在Z轴方向上的运动配合使送粉工作头具有三维空间工作能力，它克服了普通送粉头工作空间的限制，同时还具有粉末流束焦点可调功能。

While you may be able to get away with wedging your breaker bar against the cradle and cranking the engine over to remove the crank pulley bolt, you know it's not the best practice.

尽管你可能够逃脱为当转动发动机曲柄时产生的摇动而楔入断裂的木棒，由此可顺利地拆下曲轴皮带轮螺栓，也许你知道这不是最好的做法。

Two coordinate conversion matrices respectively for rotation angles in two rotators express the same conversion,they are thus equal,and by contrasting them the relationship between these two kinds of rotation...

分别用两个三自由度转动体的转角所表示的两个直角坐标系之间的空间旋转坐标变换矩阵，代表同一变换，因而相等，由两个矩阵的对应元素相等可直接得出两个转动体之间的转角关系式。

The vise is made of two parts:vise body and swivel base.Horizontal swivel goes through 360°,45°angle tilts vertically.The accurate graduations and drilling on grinders and milling machines.

精密万向平口钳是由精密工具哦空气和转盘底座两部分组成，可借助刻度转盘在水平面360°范围内转动，在垂直平面上倾斜45°，可用于精密磨床、铣床等进行平面、斜面及倾斜一定角度的斜孔加工。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。