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The key points of sensorless technology in PMBLDCM are to study a method which can detect rotor position accurately by simply method in whole speed range. After analyzing current sensorless methods of the PMBLDCM, it is found that those methods are successful at middle and high speed, but they often fail to detect rotor position at low speed when the back electromotive force is small or zero.

纵观目前的永磁无刷直流电机的无位置传感器控制方法,比较成熟而可行的方法多集中于电机在中高速区域运行时,能够较准确估计转子位置;电机处于低速、极低速、静止状态时电加热管,因为反电动势幅值较小或者为零,而无法正常工作。

The results show that: the input of the internal fixation implant should be in accordance with the compressive trabeculae and be clingy with the femoral calcar; the stress distribution of the femur under external violence explained why the old people are easy to get the middle and low part fractures of the femoral neck and intertrochanteric fractures.

分析结果表明:股骨颈处的压力骨小梁和股骨距是重要的承载结构,临床医学治疗股骨颈骨折时,内固定物的放置应循压力骨小梁方向并尽量紧贴股骨距钻入;暴力作用时股骨上端的应力分布特点从生物力学的角度说明了老年人易于发生股骨颈中下段骨折和转子间骨折的原因。

On the fracture section, three strain gauges were put above the pins of groups fixed with external fixator. The gauges were recorded when the femurs were loaded vertically. Results (1) The compressive trabeculae and femoral calcar in the femoral neck region are the main load-bearing construction. The contract of the abductor muscle can protect the hip joint. When the model femur was abducted in small degree (10-30°), the stress improved gradually with the abductor angle. But adduction of the model will gradually decrease the stress in that area. When external violence was put on it, the main stress distribution was on the upper femur, which was in the middle and lower part of the femoral neck and between greater trochanter and lesser trochanter.

同时在④⑤两组又应用电阻应变片贴于断端间的三枚斯氏针上方以测定钢针上的应力与应变结果(1)股骨颈处的压力骨小梁和股骨距是重要的承载结构;载荷的传导主要通过压力骨小梁和股骨距由股骨颈区传至股骨干的中下1/3处;外展肌力的收缩对髋关节有一定的保护作用;在小角度外展实验中(10-30°)股骨颈区的应力递增,超过30°时股骨颈区的应力又逐渐减小,但在内收实验中随角度增大股骨颈处应力呈递减趋势;当外界暴力作用时,应力主要集中在股骨上段,即股骨颈中下段和大小转子处及其之间。

Coaxial, contrarotating and widely separated semi-rigid three-blade rotors, with swept blade tip, attached to hub by steel plates; small fuselage cross-section, with nose sensors; flat-screen cockpit, heavily armour protected by combined steel/aluminium armour and spaced aluminium plates, with rearview mirror above windscreen; small sweptback tailfin, with inset rudder and large tab; high-set tailplane on rear fuselage, with endplate auxiliary fins; retractable landing gear; mid-set unswept wings, carrying ECM pods at tips; four underwing weapon pylons; engines above wingroots; high agility for fast, low-flying, close-range attack role; partially dismantled can be air-ferried in Il-76 freighter.

同轴,并广泛分离的反向半刚性三叶片转子,叶片尖后掠,隶属由钢板枢纽;小机身的横截面,有鼻子传感器;纯平驾驶舱,重装甲保护的组合钢/铝装甲铝及间隔板,前挡风玻璃与后视镜以上;小sweptback尾翼,方向舵与插图和大型标签;高载列于机身后部尾翼,与终板辅助鳍,可伸缩的起落架,中集未波及翅膀,承载的秘诀流脑豆荚;四翼武器挂架; wingroots发动机以上;快速高敏捷性,低空飞行,近距离攻击的作用;部分拆除,可空气中摆渡伊尔76货机。

The whole machine performance curve of air blower made in accordance with controllable eddy ternary current rotator technology is complanate,its surging outflow is little, and it can ensure the design calculation astringentyunder the condition of wider blade or small curvature radius.

按照可控涡三元流转子技术制造的鼓风机的整机特性曲线平坦,喘振流量小,可确保宽叶片或小曲率半径条件下设计计算收敛。

Acorrding to the character that wavelet transform technique can localize thetime-domain and frequency-domain, it can focalize any detail of signals and can recognize theabrupt signal and nostationary signal. The characteristics of typical fault for the centrifugalcompressor rotor are extracted by wavelet transform, and the characteristics vector is foundedby using energy as element.

通过小波变换技术对时域和频域同时具有良好的局部化性质,可以聚焦到信号的任意细节,对突变信号和非平稳信号具有很强的识别能力,利用小波包变换对离心压缩机转子典型故障的振动信号进行特征提取,并以&能量&为元素,构造离心压缩机故障信号的特征向量,以便神经网络识别。

These three internal fixations of femoral peritrochanteric fracture were differ. For example, Gamma nail is less harmful, better clinical treatment, shorter in shape and stronger in anti-hip inversion. DHS, DCS have a better treatment and are stronger in anti-hip inversion but more harmful and excessive bleeding, and HCS, which is named Minimally Invasive Surgery, is the least harmful, less bleeding, suitable for old patients and the patients of tolerance of poor operation, but poor in anti-hip inversion.

3种不同方法内固定治疗转子间骨折具有各自的特点,Gamma钉具有手术损伤小及良好的临床疗效力臂短对抗髋内翻的能力强;滑动加压鹅头钉具有良好的临床疗效及相对坚强的抗内翻能力,但手术损伤相对较大,失血量较大;空心加压螺钉固定的手术损伤最小,属于微创手术方法,可经皮完成,手术出血少,适用于高龄及手术耐受性差的患者,但抗髋内翻的能力最差。

Then check the small antirotary counter-connected downtime of failure, heart-throbbing "" given and magnetic field with the hands turn drawer small motor rotor axis, the rotation were found jammed or deastringency todaya functionalbuffering be electrocircuit reasons, check the growth rate in the relay 2KJ tramsformer, the normally closed contact of the sighting of a tramsformer loosting, screw did not tighten, and pull-out, I found the head on the oxidi.

再查抄小电机在停机后不侧转不到位的障碍,拉不开&给不退与磁场&抽屉,用手转不静小电机的转子轴,未发掘卡住或转不静阻涩的本体,外明是电路的来因所致,查抄增速继电器2KJ的常不开触不面接线,发掘有一根接线松不静,螺丝不有拧不松,且不不收入后发掘线头上有氧化层。

Rotators – these are small muscles of the rotator cuff that control small movements of the upper arm.

转子 -这些是小肌肉的肩袖小运动控制的上臂。

The conventional onesided travelling-wave ultrasonic motor needs bearing to support and oil to lubricate, does provide sufficiently high torque and power due to limited contact area between the stator and the rotor, consequently its application is limited.

针对传统的行波超声电机定转子接触面小、输出力矩小,需要轴承定位,存在润滑问题,设计了一种新型双锥面齿驱动的自支撑轴系行波超声电机。

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As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸,那乌黑、忧郁的眼睛,她便会相信,他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失

But because of its youthful corporate culture—most people are hustled out of the door in their mid-40s—it had no one to send.

但是因为该公司年轻的企业文化——大多数员工在40来岁的时候都被请出公司——一时间没有好的人选。