rota

以逆时针旋转为例。则旧坐标到新坐标的变换矩阵为 [cos(θ) sin(θ)][-sin(θ) cos(θ)] 绕Z轴.................................绕Y轴................................绕X轴▏cos(θ)..-sin(θ)..0..0▕........▏cos(θ)..0..sin(θ)..0▕........▏1..0.........0...........0▕▏sin(θ)...cos(θ)..0..0▕........▏0..........1..........0..0▕........▏0..cos(θ)..-sin(θ)..0▕▏0..........0..........1..0▕........▏-sin(θ)...0..cos(θ)..0▕........▏0..sin(θ)...cos(θ)..0▕▏0..........0..........0..1▕........▏0..........0..........0..1▕........▏0..0..........0..........1▕

-webkit-transform-origin: center bottom;transform-origin: center bottomtransform-origin：[ <percentage> | <length> | left | center① | right ] [ <percentage> | <length> | top | center② | bottom ]?默认值：50% 50%，效果等同于center center适用于：所有块级元素及某些内联元素继承性：无取值：<percentage>：用百分比指定坐标值。可以为负值。<length>：用长度值指定坐标值。可以为负值。left：指定原点的横坐标为leftcenter①：指定原点的横坐标为centerright：指定原点的横坐标为righttop：指定原点的纵坐标为topcenter②：指定原点的纵坐标为centerbottom：指定原点的纵坐标为bottom 说明：设置或检索对象以某个原点进行转换。该属性提供2个参数值。如果提供两个，第一个用于横坐标，第二个用于纵坐标。如果只提供一个，该值将用于横坐标；纵坐标将默认为50%。对应的脚本特性为transformOrigin。

是旋转 的意思

rotate是（使)旋转，转动;(工作)由…轮值;(人员)轮换，轮值,revolve是旋转;环绕;转动，不一样

rotate的中文翻译是旋转。其他意思是：a. 辐状的；vt. 使旋转， 使转动， 使轮流；vi. 旋转， 循环例句：Does the earth rotate on an axis？地球是绕轴旋转的吗？He rotates the handle gently.他轻轻地转动手柄。The post of chairman rotates among members of the committee.主席一职由委员会的成员轮流担任。

释义：v. （使）旋转，（使）转动；（人员）轮换，轮值；轮种，轮作；定期调换地点（或位置）adj. （植） 辐状的例句：Stay well away from the helicopter when its blades start to rotate.直升机的螺旋桨开始转动时，尽量离远点儿。It also automatically rotate.它还带自动旋转。This large gear drives the small one to rotate the drum.这个大齿轮带动小齿轮使滚筒旋转。This large gear turns the small one to rotate the cylinder.这个大齿轮带动小齿轮使滚筒旋转。You can rotate your square by defining how you draw your object.您可以通过定义对象的绘制方式来旋转您的正方形。No worries there. We just have to close in with the camera and rotate it.不用担心这里。我们只需将它拉近摄像机，并旋转就可以了。In this example, you rotate a square on its center, but do not fill the square.在这个例子中，您会以中心为原点旋转一个正方形，但不填充这个正方形。

v. 轮流；(使)旋转adj. 车轮状的一、读音：英[ru0259u028a"teu026at]，美["rou028ateu026at]二、例句：Interns have to rotate for a few months.实习医生轮流工作了几个月。三、词汇用法：1、rotate的基本意思是“(使)旋转或转动”，多指物体以一点为圆心或以一直线为轴做圆周运动。引申可表示“(使)循环”“轮流”等，此时指三者或三者以上的人或物按一定顺序不断重复。 2、rotate既可用作及物动词，也可用作不及物动词。用作及物动词时，接名词、代词作宾语。 扩展资料：近义词：turn一、翻译：v. 翻转；旋转；转动；转向；轮流；（使）变得 n. 轮流；转动二、读音：英[tu025cu02d0n]，美[tu025cu02d0rn]三、例句：It is now his turn to set me up to a nice dinner.现在轮到他请我吃一顿丰盛的晚餐了。四、词汇用法：turn的基本意思是“旋转，转动”，指做圆周运动或弧形运动。引申可作“翻转”“开始涨或落”“瞄准，指向”“使…向某方向走”“达到，超过”“表演”“(使)变酸”“(使)不适，作呕，恶心”“翻译”“赶走”“考虑”“用车床加工，车削”等解。作“改变”解时，指彻底改变，以至面目全非，且常用于朝坏的方向改变。

vt.& vi. （使某物）旋转； 使转动； 使轮流，轮换； 交替 adj. [植]辐状的； 有辐射部分的 过去式： rotated 过去分词： rotated 现在分词： rotating 第三人称单数： rotates 1. V-ERG 及物/不及物动词(使)旋转;(使)转动 When something rotates or when you rotate it, it turns with a circular movement. 【语法信息】：VThe Earth rotates round the sun...地球围绕太阳转。Take each foot in both your hands and rotate it to loosen and relax the ankle.双手抓住自己的双脚，转动一下，以放松脚踝。2. V-ERG 及物/不及物动词（使）轮流;（使）轮换 If people or things rotate, or if someone rotates them, they take it in turns to do a particular job or serve a particular purpose. 【语法信息】：VThe members of the club can rotate and one person can do all the preparation for the evening...俱乐部的成员可以轮流工作，而且一个人就能做好晚上的所有准备工作。They will swap posts in a year"s time, according to new party rules which rotate the leadership.根据轮流担任领导的新政党章程，他们在一年后会轮换职位。

Rotate，是旋转的意思常在，俄罗斯方块游戏机见到

js里面有一个东西叫定时器，用起来是setinterval（方法明，心跳）；你写个方法一直改变divrotate，点击停止方法就好了。

用原始图旋转各个角度，而不用旋转后的已损图再转..可以避免。。通常就够了。实在效果不好可以放大八倍再转再缩小....

CAD中如何旋转参照rotate命令旋转的参照功能主要用处，就是使两条线变平行，即转为相同角度实际在普通直接旋转时，也是有参照的，参照线就是X轴，即0度。那么该如何操作呢？有需要的可以浏览一下我列举的方法，如下：1、方法一： 选目标线（黄线），点击旋转，选择基点（黄线C点），点参照（或输入R），选黄线两端（以自己为参照），点“点”选项（或输入P），选绿线两端（即转为绿线的角度）2、方法二： 选目标线（黄线），点击旋转，选择基点（绿线B点），点参照（或输入R），选黄线两端（以自己为参照），点绿线另一端，完成3、公式如下： 实际旋转的角度=输入值-参照线角度+目标线角度 不用参照的情况下，参照线就是X轴，即零度 不用参照的情况下，直接输入数值，结果=原角度+输入值 以自己为参照的情况下，结果就直接等于输入值

over the sound of ratu2019s feet, and rat screams, and themusic

顺时针方向。在大多数旋转指令当中，正数均代表顺时针方向，负数代表逆时针方向。

指定圆弧的起点。如果未指定点就按 ENTER 键，最后绘制的直线或圆弧的端点将会作为起点，并立即提示指定新圆弧的端点，也就是圆弧的终点。这将创建一条与最后绘制的直线、圆弧或多段线相切的圆弧。角度是指圆弧的角度。角度为正，逆时针绘制圆弧。如果角度为负，将顺时针绘制圆弧。

先用rotate对元素进行2D旋转，使其对角线与X轴（或Y轴）重合。如果不重合则再用translate进行平移直到重合。最后用rotateX（或rotateY）进行3D旋转即可。

时间上的区别：spin为持续性的，而rotate为短暂的

CSS transform中的rotate的旋转中心设置参考下面方法：transform-origin:50% 50%; 设置旋转中心为元素中心。transform-origin:0% 0%; 设置旋转中心为元素左上角。transform-origin:100% 100%; 设置旋转中心为元素右下角。

rotate 　　rotateX 　　rotateY 　　 rotateZ 　　rotate3d rotate： 旋转该元素，配合着transform-origin属性，transform-origin 是设置旋转点的。(没有设置transform-origin 属性也可以，只不过是根据该元素的中心点旋转，也就是center center) 加上 transform-origin 设置旋转点。transform-origin 是根据自己而定位的，所以 0px 0px 就是左上角那个点。 rotateX： 讲这个之前呢， 先普及一个知识， 在transform里面，x y z 轴，分别是什么样子的，他跟我们平常的 x 和 y 不太一样，因为， 他是倒着的。 Z轴呢，在0 那个位置，因为他是3D的，看下面的图，转个身就知道在那里了。 接下来，看看 所谓的 Z 轴是什么 rotateX 的X呢，可以写成大写的，也可以写成小写的x， 没有影响，这个属性呢，你加上rotateX 之后，这个元素，就会以 X 轴 旋转，里面填的是角度。 这样看起来，好像不是那么直观，毕竟是2D 的图， 来给他加了3D 的效果看看，(由于设置了 transform-origin：0 0，所以并不会在元素的中间旋转，而是以 0 0 点的那条x 轴旋转) 上面两个图，第一个图是在 2d的 情况下观看的，第二个图是 3d的时候， 是不是 3d 看起来比较直观。 那么，接下来，加上Y 一起使用，rotateX(45deg) rotateY(45deg)，这两个合在一起什么意思呢， 这个元素，先按照 X轴，旋转45度，然后再按照Y轴，旋转45度，那么接下来的结果会是怎么样呢？ 由于我设置的 transform-origin：center center ；定的点在中心，那么两条轴，是会成这样子的。 然后，看下，结果，是不是如我们所示？ 最后，加上rotateZ rotate3D： 设置一条主轴，然后根据这条轴旋转 这个呢，可以设置4个参数， 前三个是，x y z 最后一个是 角度deg 但是，此 x y z ，可不是上面那几个，不一样的。这三个值，设置的是矢量的方向，填什么无所谓，主要是比值很重要。举个例子 1，1，0，0deg 那么就是 1：1：0 = 100：100：0 对吧，拿这个值来图解比较好。

rotate其实就可以看做是一个循环移位的函数，比如将串“ABCDEFG”以D为中心旋转，就相当将该串向左循环移位，直到元素为D为止，最后得到新串“DEFGABC”。以上就解释了你所遇到的问题，重要的是第二个参数，要比第三个小，以第二个参数为中心

揉他！

写一个方法，每次赋予div.style.webkitTransform不同的值(递增或递减)然后定时循环调用。请把代码贴全。

transform这个属性有几个可选值（平移、旋转、变形、倾斜） 这里记录下translate（平移）和rotate（旋转）书写顺序的影响。 到底是先平移还是先旋转，这会直接影响页面最终的显示结果。 这里通过演示来说明下问题 1、 translate在前，rotate在后 的效果演示 http://sandbox.runjs.cn/show/cslnosgm 2、 rotate在前，translate在后 的效果演示 http://sandbox.runjs.cn/show/bzbemiwx 从演示可以看出，元素先进行了旋转操作，然后将旋转后的结果进行平移

在事件中加入repaint();

以中心竖轴线为基准旋转。$(obj).rotate(30); //即正上向右偏转30度

程序呢？

基本一样

rotate(h,[0 0 1],0.2)1、h，这是画图函数返回的句柄，用于后续操作；2、[0 0 1]，用于指定旋转轴，分别对于x、y、z轴，1表示指定该轴为旋转轴；3、0.2，旋转角度，按第2步指定的轴把h句柄指定图像旋转0.2度；可以试试下面例子，感觉一下t=(0:0.01:2)*pi;[x,y,z]=cylinder(1+cos(t).^2);subplot(2,2,1);h1=surf(x,y,z),colormap(Jet),axis square;zdir = [1 0 0];subplot(2,2,2);h2=surf(x,y,z),rotate(h2,zdir,90)zdir = [1 0 0];subplot(2,2,3);h3=surf(x,y,z),rotate(h3,zdir,45)

如果手机上装了QQ浏览器，微信就用的是QQ浏览器内核，如果没装就用的是系统的浏览器内核，安卓用的chrome内核，ios用的是safari内核。所以QQ浏览器没有问题，说明问题不是出在contenteditable。contenteditable这个属性兼容性很好，ie678都能兼容的。腾讯的QQ空间就是用的这个属性。

offset-keyword：是top、right、bottom、left或center中的一个关键词，可以用来设置transform-origin的偏移量。y-offset：用来设置transform-origin属性在垂直方向Y轴的偏移量，可以使用<length>和<percentage>值，同时可以是正值（从中心点沿垂直方向Y轴向下的偏移量），也可以是负值（从中心点沿垂直方向Y轴向上的偏移量）。x-offset-keyword：是left、right或center中的一个关键词，可以用来设置transform-origin属性值在水平X轴的偏移量。y-offset-keyword：是top、bottom或center中的一个关键词，可以用来设置transform-origin属性值在垂直方向Y轴的偏移量。z-offset：用来设置3D变形中transform-origin远离用户眼睛视点的距离，默认值z=0，其取值可以<length>，不过<percentage>在这里将无效。

其实意思差不多v1是最小起飞速度，v2是最大起飞速度，有的国外飞行员也会把v2叫vgo.其实在v1和v2之间rotate就可以，但是现在大部分飞行员的喜欢就是在v2之后马上rotate，也就是拉起，也可以解释为抬头。rotate在这里并不是旋转的意思，本人专业发烧友，飞机理论基本都略知一二。望采纳

不及物动词 vi. 　1. 旋转,转动2. 循环,轮流及物动词 vt. 　1. 使旋转,使转动 2. 使轮流;轮换 形容词 a. 　1. 【植】辐状的

lithium orotate.的中文翻译lithium orotate. 乳清酸锂。乳清酸锂,一种锂盐,锂与有机酸的化合物.

放不下，它的内部结构是这样的，见图：

Dart是一门单线程的语言，Dart对异步操作对支持，可以使我们在编写Dart程序时可以异步的来执行耗时操作。这里的异步和多线程不是一个概念，在Dart中，异步但没有多线程，仍然是单线程。 在Dart中，实际上有两种队列： 在每一次事件循环中，Dart总是先去第一个microtask queue中查询是否有可执行的任务，如果没有，才会处理后续的event queue的流程。 异步任务我们用的最多的还是优先级更低的 event queue。Dart为 event queue 的任务建立提供了一层封装，就是我们在Dart中经常用到的Future。 正常情况下，一个 Future 异步任务的执行是相对简单的：

Computes the axis and angle of rotation for a quaternion 计算四元数的轴和旋转角度。 Angle angle of rotation in degrees . order 旋转角度（以度为单位） 。 Angle angle of rotation , in radians 旋转角度（以弧度为单位） 。 Angle angle of rotation in degrees 旋转角度（以度为单位） 。 Angle a number , passed by reference , that identifies the angle of rotation , in radians , of the quaternion 一个按引用传递的数值，标识该四元数的旋转角度（以弧度为单位） 。 For information about how to calculate quaternion values from a direction vector x , y , z and an angle of rotation , see 有关如何计算从方向向量( x , y , z )和旋转的角度计算四元数值的信息，请参见 Steel construction . bolted joints with controlled tightening . tightening by controlled turn of nut . determination of the angle of rotation 金属结构.可控拉紧螺栓连接.螺母控制旋转拉紧.旋转角测定 In the experiment , the author get many conclusions on the fixed beam strengthend by the o means through *** ysing the experiment result , including strain , displacement , angle of rotation and damage character 通过对试验梁应变、挠度、转角、破坏特征等方面的分析研究得出了许多关于这两种方法加固固支梁的结论。 So the research on these new materials is being more and more important . we collected and *** yzed the overseas and domestic sufficient date for the optical characteristics of mago - optic crystal . then we bring forward a research topic in varying magic field on some crystals optical characteristics such as the angle of rotation , the depolarization ratio and so on 本文在对国内外有关磁光晶体光学特性研究状况进行调研之后，从外界磁场对晶体光学特性的影响这一角度出发，在大范围可调谐磁场下，对几种不同的磁光晶体的光学特性，诸如faraday旋转角、退偏度等进行了测定。

Rotary drilling is a method used to drill deep boreholes in rock formations of the earth"s crust. This method is comparatively new，having been first developed by a French civil engineer，Rudolf Leschot，in 1863. The method was initially used to drill water wells using fresh water as the circulation fluid. Today this method is the only rock drilling technique used to drill deep boreholes ( greater than 3000 ft) . It is not known when air compressors were first used for the drilling of water wells，but it is known that deep petroleum and natural gas wells were drilled utilizing portable air compressors in the 1920"s . Pipeline gas was used to drill a natural gas well in Texas in 1935 using reverse circulation techniques.Today rotary drilling is used to drill a variety of boreholes. Most water wells and environmental monitoring wells drilled into bedrock are constructed using rotary drilling. In the mining industry rotary drilling is used to drill ore body test boreholes and pilot boreholes for guiding larger shaft borings. Rotary drilling techniques are used to drill boreholes for water， oil，gas，and other fluid pipelines that need to pass under rivers，highways，and other natural and man-made obstructions. Most recently，rotary drilling is being used to drill boreholes for fiber optics and other telecommunication lines in obstacle ridden areas such as cites and industrial sites. The most sophisticated application for rotary drilling is the drilling of deep boreholes for the recovery of natural resources such as crude oil，natural gas，and geothermal steam and water. Drilling boreholes for fluid resource recovery requires boreholes drilled to depths of 3000 ft to as much as 20000 ft.Rotary drilling is highly versatile. The rotary drilling applications given above require the drilling of igneous， metamorphic， and sedimentary rock. However， the deep drilling of boreholes for the recovery of crude oil and natural gas are almost exclusively carried out in sedimentary rock. Boreholes for the recovery of geothermal steam and water are constructed in all three rock types. The rotary drilling method requires the use of a rock cutting or crushing drill bit.To advance the drill bit in rock requires the application of an axial force on the bit ( to push the bit into the rock face) ， torque on the bit ( to rotate the bit against the resistance of the rock face ) ，and circulating fluid to clear the rock cuttings away from the bit as the bit generates more cuttings with its advance ( Figure 14. 1) .Figure 14. 1 The three necessary components for rotary drillingRotary drilling is carried out with a variety of drilling rigs. These can be small “single”rigs，or larger “double” and “triple”rigs. Today most of the land rotary drilling rigs are mobile units with folding masts. A single drilling rig has a vertical space in its mast for only one joint of drill pipe. A double drilling rig has a vertical space in its mast for two joints of drill pipe and a triple drilling rig space for three joints. Table 14. 1 gives the API length ranges for drill collars and drill pipe.Table 14. 1 API length ranges for drill collar and drill pipeSingle rigs can be fitted with either an on-board air compressor，or an on-board mud pump. Some of these rigs can accommodate both subsystems. These rigs have either a dedicated prime mover on the rig deck， or have a power-take-off system which allows utilization of the truck motor as a prime mover for the drilling rig equipment ( when the truck is stationary) . These small drilling rigs provide axial force to the drill bit through the drill string via a chain or cable actuated pull-down system，or hydraulic pull-down system. A pull-down system transfers a portion of the weight of the rig to the top of the drill string and then to the drill bit. The torque and rotation at the top of the drill string is provided by a hydraulic top head drive ( similar to power swivel systems used on larger drilling rigs) which is moved up and down the mast ( on a track) by the chain drive pull-down system. Many of these small single drilling rigs are capable of drilling with their masts at a 45° angle to the vertical. The prime mover for these rigs is usually diesel fueled.Typical double rigs have the capability to drill to depths of approximately 10000 ft and are used for oil and gas drilling operations，geothermal drilling operations，deep mining and geotechnical drilling operations，and water wells. Double rigs typically use Range 2 drill collars or drill pipes. These rigs are fitted with an on-board prime mover which operates the rotary table，drawworks，and mud pump. The axial force on the drill bit is provided by drill collars. The torque and rotation at the top of the drill string is provided by the kelly and the rotary table. The double drilling rigs have a “crows nest”or “derrick board”nearly midway up the mast. This allows these rigs to pull stands of two drill collars joints or two drill pipes joints. These rigs can carry out drilling operations using drilling mud ( with the on-board mud pump) or using compressed air or gas drilling fluids ( with external compressors) . A fewof these drilling rigs are capable of drilling with their masts at a 45° angle to the vertical. The prime mover for these rigs is usually diesel fueled，but can easily be converted to propane or natural gas fuels.Triple drilling rigs are available in a variety of configurations. Nearly all of these drilling rigs are assembled and erected from premanufactured sections. The vertical tower structure on these drilling rigs is called derricks. The smaller triple land rigs can drill to approximately 20000 ft and utilize Range 2 drill collars and drill pipes. Very large triple drilling rigs are used on offshore platforms. These rigs can utilize Range 3 drill collars and drill pipes.The schematic layout in Figure 14. 2 shows a typical self － propelled double drilling rig. This example rig is fitted with a mud pump for circulating drilling mud. There is a vehicle engine that is used to propel the rig over the road. The same engine is used in a power-take-off mode to provide power to the rotary table，drawworks，and mud pump. For this rig，this power-take-off engine operates a hydraulic pump which provides fluid to hydraulic motors to operate the rotary table，drawworks，and mud pump. The “crows nest”on the mast indicates that the rig is capable of drilling with a stand of two joints of drill pipe. This drilling rig utilizes a rotary table and a kelly to provide torque to the top of the drill string. The axial force on the bit is provided by the weight of the drill collars at the bottom of the drill string ( there is no chain pull-down capability for this drilling rig) . This example schematic shows a rig with on- board equipment that can provide only drilling mud or treated water as a circulating fluid. The small air compressor at the front of the rig deck is to operate the pneumatic controls of the rig. However，this rig can easily be fitted for air and gas drilling operations. This type of drilling rig( already fitted with a mud pump) ，would require an auxiliary hook up to external air compressors to carry out an air drilling operation. Such compressor systems and associated equipment for air drilling operations are usually provided by a subcontractor specializing in these operations.Figure 14. 2 Typical self-propelled double drilling rig schematic layout

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Yet the march 1979 burster , with an apparent rotation period of eight seconds , was spinning much more slowly than any radio pulsar then known 但1979年3月那次的爆炸源，看起来却有八秒的周期，自转速率要比当时所知的任何波霎还要慢得多。