有向圆

词组短语

oriented circle

与有向圆相关的网络例句 [注：此内容来源于网络，仅供参考]

The effect of tribology factors on bearing vibration is studied experimentally. AR model and WPT are used to processing the normal arid abnormal signals. The results are as follows:1. The vibration of ball bearings is caused by the tribology action of contact pairs of ball and ring races and has the essential of tribo-dynamics. Any factors affecting the tribology characteristics of contact pairs will affect vibration and noise of bearings consequently.2. Vibration characteristics of bearing keep almostly unchanged with the increasing of axial load expecting the increasing of nature frequencies. When radial load increasing with axial load unchanged, nature frequencies keep unchanged but some new vibration peaks appears in the spectrum.3. Vibration amplitudes are damped and nature frequency are enhanced with sufficient lubrication. Vibration and noise of bearings increase obviously and roar can happen and the contact surfaces scratch slightly under insufficient and unclean lubrication state. Bearing will be disabled in a few minutes without any lubrication.4. Bearing vibration is unstable under low speed. With the speed increasing, the vibration become stable and natural frequencies increase slightly but the amplitudes increase apparently.5. Bearing vibration can be excited only by some harmonics ofwaviness without lubrication and by all harmonics with lubrication based on the theoretical analysis.6. The nature frequencies of ball bearings decrease with the increasing sizes. When international clearance increasing, nature frequencies decrease in radial and increase in axial and angular and the amplitudes increase in radial and decrease in axial and angular. When the number of balls increasing, nature frequencies increase and amplitudes decrease. When the pitch diameter increasing, axial nature frequency increase and others nearly keep no change. When outer race groove curvature radius increasing, nature frequencies increase in radial and decrease in axial and angular and amplitudes keep no change in radial and increase in axial and angular. When inner race groove curvature radius increasing, nature frequencies decrease and amplitudes increase.7. The distortion in amplitude and frequency components of bearing vibration signals picked up by the present probe measurement method is founded and right conclusions cannot be achieved by the signals. When accelerometer is rigidly screwed with steel stud onto a flat outer surface of a ball bearing, vibration signal can be got without distortion and the reliability of research on bearing vibration is assured.8. AR model is suitable for large samples of bearing vibration signals, square root of length of samples can be used as the upper limitation of order determination and the FPE order selection criterion is effective. Many advantages of AR spectrum are founded over the classical based on FFT.9. Time-Frequency analysis is necessary for abnormal noise of ball bearings. WPT overcomes the principle shortcomings of STFT and proved to be a best tool to process the abnormal signals.

理论分析和试验研究表明： 1球轴承振动是钢球—滚道接触副中的各种摩擦学作用引起的，具有摩擦动力学的本质，任何对接触副的摩擦学特性有影响的因素都将对球轴承的振动和噪声特性产生影响； 2中心轴向载荷作用下，载荷增大使球轴承的固有振动频率升高，载荷越大同样的载荷增幅引起的频率升幅减小，足够大的中心轴向载荷作用下载荷的变化对球轴承振动的频率特性不会产生明显的影响； 3轴向和径向联合载荷作用下，径向载荷不大时球轴承振动的固有频率基本不变，但是可能引起变刚度激励的非线性振动，出现新的频峰，过大的径向载荷将使部分钢球脱离接触，使球轴承的振动和噪声呈现不稳定状态； 4润滑对球轴承的振动和噪声特性有重要的影响，良好的润滑对振动有明显的抑制作用，润滑不充分时，振动和噪声的水平会有明显增高，一定条件下还会激发接触副中的谐振，发出啸声，造成接触表面的伤害，无润滑干接触时，短时的运转就会损伤接触副表面，使振动和噪声迅速增大，并随时可能引发严重的磨损和卡滞失效；接触副润滑良好时，油膜的"刚化效应"使球轴承振动的固有频率有所提高，润滑剂中含有弥散性污浊时，振动的幅度总体升高，但弥散性污浊不会改变球轴承振动的频率特性；浙江大学博士学位论文：球轴承振动的研究 5低速时，球轴承振动的基本特征呈现不稳定状态，随着转速的提高，球轴承振动的频率特性趋于稳定，固有频率频峰升高； 6理论分析表明，干接触时钢球和滚道表面波纹度的某些谐波分量能激励球轴承的振动，振动的幅值与谐波幅值成正比，实际球轴承中钢球的分布不可能完全均匀，波纹度的激励作用会随时发生；润滑接触的分析表明，波纹度的任意谐波分量均能激励球轴承的振动； 7球轴承的几何和结构参数分析表明，球轴承尺寸越大，径向、轴向和角振动的固有频率越低；钢球中心圆直径增大，球轴承的径向和轴向振动的固有频率基本不变，角振动的固有频率有所上升，振动的幅频特性基本不变；径向游隙加大使球轴承的径向振动固有频率降低，轴向和角振动的固有频率有所升高，径向振动幅频特性的幅值升高，而轴向和角向降低；钢球的数量增多使球轴承振动的固有频率上升，幅频特性的幅值下降，径向振动的幅值下降最为明显；外圈沟曲率半径系数增大使球轴承径向振动的固有频率升高，轴向和角振动的固有频率降低，径向幅频特性基本不变，轴向和角向幅频特性幅值升高；内圈沟曲率半径系数增大使径向、轴向和角振动固有频率均下降，振动幅频特性的幅值均有升高； 8试验对比表明，传感器采用探针式安装时，由于探针接触副接触特性的影响，钡(量得到的球轴承振动信号有失真，采用专门设计和制作的试验球轴承，以固定式安装加速度计，首次测量得到了球轴承振动的真实信号，通过对振动信号的分析，验证了球轴承振动的理论模型； 9)基于时间序列分析的AR模型适用于大样本球轴承振动信号的分析，以样本长度的均方根值作定阶上界，FPE做判阶准则，给出的AR谱光滑，频率分辨率高，是球轴承振动分析的简便而可靠的手段； 10以时频域分析的小波包变换分析球轴承异音信号能够比较好地定位和聚焦异音发生的时间，时间间隔，频率范围，同样是球轴承振动分析的可靠的手段，可用作球轴承故障诊断技术。

Additionally, the top wall has a flexible annular ring formed axially along an inner surface and depending downwardly therefrom and spaced inwardly of the skirt.

另外，顶壁有一个沿其内表面轴向地形成的向下延伸的弹性圆环，并且该弹性圆环向内与环状裙边分隔开。

The results showed that the light seiner had decreased continually with the station in marine fishery declining constantly due to development of single trawlers and drift gill net; fishing vessels became large and fishing ground was pushed to deep water,significant development had been achieved in light-source fittings technology; Decapterus maruadsi was dominant in the catch, the percent of Pneumatophorus japonicus increased and Sardinella aurita fluctuated obviously.

结果表明：由于单拖作业和流刺网作业的发展，灯光围网作业持续萎缩，在海洋渔业中的地位不断下降；渔船大型化，渔场向深水推进，灯源配置及集鱼并灯技术取得重大突破；主要渔获物中蓝圆鲹占绝对优势，鲐鱼所占比例有上升的趋势，金色小沙丁鱼年间波动明显，颌圆鲹则快速减少，竹荚鱼近年来产量快速增长。

Flowers white; leaf margin subentire to inconspicuously and remotely crenate-serrulate or serrulate toward apex; sepals not persistent on fruit.

花白色 对不明显和稀疏具圆齿有细锯齿的或有细锯齿向先端近全缘的叶缘；在果上不宿存的萼片。

I must look into that dark cave, where, through boulders and scowling stones, trickles a tiny stream.

我一定要向那个黑洞里张望，在这个洞里，有一道小泉从圆的和有皱纹的石上滴下来。

The pressure roll cooperates with the building drum has a plurality of discs mutually slidable with respect to one another and on a shaft so as to extend radially with respect to the building drum, the discs being mutually uniformly shaped, and each disc having an interior part and an exterior ring surrounding the interior part and being rotatable about a ball bearing, the interior part having a recess whose sidewalls slide radially on the sidewalls of the shaft and whose length is greater than the corresponding size of the shaft.

压力辊合作与建立鼓有一个多元性的光碟slidable互相尊重，互相对竖井等，以延长呈辐射状与敬意，向建设鼓，碟片相互均匀状，每个圆盘有一个内部的一部分和一个外环周边内政部分，并正在旋转约球轴承，内政部分，有一个休会期间，其侧板滑动呈辐射状上侧板的竖井，其长度大于相应规模的竖井。

The garden, which was slightly arched, had in its centre, on the summit of a hillock, a fine pointed and conical fir-tree, whence ran, as from the peaked boss of a shield, four grand alleys, and, ranged by twos in between the branchings of these, eight small ones, so that, if the enclosure had been circular, the geometrical plan of the alleys would have resembled a cross superposed on a wheel.

园里的地面是微微隆起的，中间有个稍高部分，一株美丽的圆锥形的枞树耸立在那上面，宛如圆盾中心的突刺，四条宽道从那中心出发，伸向四方，每一条宽道又都有两条小路，各向左右分展出去，各各相通，因此那片园地，假使是圆的话，那些道路所构成的几何图形就象一个加在轮子上面的十字架。

When you cut down a tree and look at the stump, you can see that the wood has lots of dark rings in it. Long ago, the wood dried out and people kept throwing darts at the stump, the wood started to crack from the center to the sides. That is why modern dartboards have rings and lines.

当你把一棵树砍倒后，看看树桩，就可以看到为数众多的深色圆环，当时木头乾掉，人们持续朝树桩射飞镖，木头就会从中间向旁边裂开，这就是为何现代标靶有圆环和线条。

That is, the business card printing and membership card making thousands of pieces of paper, in particular domestic uncoated paper or book paper occurs paper wool, paper powder in the rubber roller, imprinted on the edge of the paper and paper Mao superdirective (direction to bite or to drag-and-shoot direction), the not equal to the linear speed of the roller, only in the cylinder lining after business card printing and membership card when, in the rubber roller paper coated maoba non-directional well, then this data is only lining is the best, that is, until you reach the drum running as business card printing and membership card making ink plates and blankets, as well as on the status of the delivery is the best.

即制卡和会员卡制作几千张纸(出格是舶来胶版纸或书刊纸)后不离会不入现纸毛、纸粉粘在橡皮滚筒上，若痕迹边际的纸粉、纸毛有不圆向性(向咬口不圆向或向拖梢不圆向)，则表明不有到达滚筒线速度不不等，只有在滚筒包衬后制卡和会员卡制作时，在橡皮滚筒上纸粉纸毛堆得不有有不圆向性，那么这栽包衬数据才是最恶的，亦即滚筒调动到了运转最恶环境，制卡和会员卡制作历程洋油不朱在印版、橡皮布以及纸张上的传达是最恶的环境。

In this paper, a fixed value theorem for direct areas of height triangle s in circular inscribed polygons is obtained, and some results, including the famous height theorem in a triangle, are deduced.

给出圆内接 2n +1边形中高线三角形有向面积的定值定理及其推论，其中包括著名的三角形的高线定

与有向圆相关的网络解释 [注：此内容来源于网络，仅供参考]

distress and conviviality together to partition our life：人有悲欢离合

何事长向别时圆. tell me why you are not always goodliness | 人有悲欢离合,distress and conviviality together to partition our life | 月有阴晴圆缺,raindrop and brightness unite the god's compassion

gimbal：万向接头

这是以英国放射生物学家 L.H.格雷(1905-装在双万向接头(gimbal)上边缘很重的圆盘,因此它的轴可在空间中 任意定向. 当圆盘自旋时,整个装置有两种有用的特性:(1)陀螺仪惯性,即轴的自旋方向会对抗改变,以致若转动万向接头,

the matter grows to don't hour circle：(何事长向别时圆)

Shouldn't have already hated, (不应有恨) | the matter grows to don't hour circle.?(何事长向别时圆) | The person has joys and sorrows,(人有悲欢离合)

oriented chain complex：有向链复形

orientation reversing 反转定向的 | oriented chain complex 有向链复形 | oriented circle 有向圆

oriented circle：有向圆

oriented chain complex 有向链复形 | oriented circle 有向圆 | oriented contour 有向围道

oriented contour：有向围道

oriented circle 有向圆 | oriented contour 有向围道 | oriented element 有向元

segments：段数

)圆面分段数(segments)用于如果模型计算的不是很光滑时,可以将此值加大. 对齐轴心的位置(align)有三种方式,最小(min),中间(center),最大(max),设定旋转轴是放置在轴向的最小点上,或是最大点上等,一般常用最小的方式.

shivering：颤抖的

普西瓦先生(Pukczyva)眼睛突出,确实看见颤抖的(shivering)曲棍球圆盘(pucks)从他的眼睛飞出,打中你的脸. 或者,他的眼睛是颤抖的曲棍球圆盘. 安特西威茲先生(Antesiewicz)下巴有明显的裂痕. 看见野蛮人从裂痕向你冲过来;你抵抗他们,

sphenoid bone：蝶骨

2、蝶骨(sphenoid bone) 位于颅底中央,形似蝴蝶,由四部分组成. 中央为蝶骨体,体内有一对空腔为蝶窦. 自体伸出三对突起,前上方一对称蝶骨小翼,为三角形的骨片,小冀和体的交界处有视神经管. 两侧的一对为蝶骨大翼,其根部有圆孔、卵圆孔和棘孔自前向后外排列,

Cyclotella：小环藻属

小环藻属(Cyclotella) 中心纲圆筛藻目圆筛藻科的1属. 细胞圆盘形,很少呈椭圆形. 壳面构造分成两圈:外圈有向中心的带条纹或条状纹,有时有小刺;内圈即中央部分,平滑无纹,或有向心排列的点纹,或有排列不规则的花纹. 壳面平或有起伏,