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force arm
    at standard anatomic attitude, knee cap made the length of force arm increase about 2.5 times;
    在解剖基准位,髌骨使力臂长度增加了约2.5 倍;
    According to the above formula, the initial rigidity and ultimate moment is calculated by developed program to several kinds of gabled frames end-plate connection joint with different types (such as end-plate connection horizontally placed , vertically placed and inclinedly placed), different end-plate thickness, different bolt diameter. The different result is compared with different end-plate thickness, the different force arm in joints, different bolt diameters and strength grades.
    按推导的公式编程计算了不同形式(端板外伸式、端板平齐式、端板斜接、柱腹板加劲)、不同端板厚度、不同螺栓直径的门式刚架梁柱端板节点的初始刚度、节点极限弯矩,并比较了不同端板厚度、不同节点力臂、不同螺栓直径和强度等级、不同连接形式下初始刚度和极限弯矩的变化。
    This paper analyses the cause of producing impression on the end of round steel sheared by arc knife-edge shears and puts forward the method to produce anti-bending moment by increasing the length of force arm based on lever principle for enhancing the end quality of sheared round steel
    分析了弧剪刃剪切圆钢时轧件剪切端头产生压痕的原因,提出了运用杠杆原理,增加力臂长度,产生反弯曲力矩,以及提高剪切圆钢的端头质量的方法。
    We considered that it is the adapting change to the load: the force arm of Achilles tendon extended, and the load distributed evenly to every tendon fiber.
    这是人体对负荷应力的适应性变化 ,有加大跟腱作用力臂 ,使跟腱各部分纤维均匀受力的作用
    at the standard anatomic level, the knee cap makes the length of the force arm increase by 2.5 times;
    在解剖基准位,髌骨使力臂长度增加了约2.5倍;
    Taken the new tension calculation model,combined the change of rolling force arm in rolling process and according to tension equation based on elasticity distortion theory,a calculation model for dynamic tension change was designed. Then,new tension observer for hot rolling mini-tension control process was constructed and good effect was achieved in actual production application.
    采用新张力计算模型,结合轧制过程中轧制力臂变化,基于以弹性变形理论为基础的张力方程,设计出张力动态变化的计算方法,由此构建新的热轧微张力控制过程的张力观测器,在生产应用中取得了良好的效果。
    CONCLUSION: NT-PC can antagonize the tensile stress of patellofemoral joint and sustain the normal extent of center rotation in knee joint and force arm of quadriceps femoris and has good therapeutic effect in treating patellar fracture in anteroposterior axes.
    结论:NT-PC能有效对抗髌股关节的张应力、维持膝关节正常的旋转中心范围和股四头肌的力臂. 应用于矢状位髌骨骨折疗效良好.
    A group of warp runs in one size box,the generating of length difference in each warp beam should check the warp unwinding mechanism such as air cylinder and checking force arm and strengthen the control of warp quality.
    对于进入一个浆槽的一组经纱,各经轴之间回丝长度有差异,应检查经纱退绕控制机构(气缸、制动力臂等)工作状况,另外还应加强对整经质量的控制。
    Enlarged offset reduces the pressure of acetabular bone and finally reduces the worn out of polyethylene in acetabular bone because of increased force arm of abductor;
    增加的偏心距由于加大了外展肌力臂,而减小了髋臼压力,最终减少了髋臼聚乙烯磨损;
    For changing law of force arm and moment in research process about plate bend, with the help of mathematical operation experiment research, the mathematical model on "U shape" parts for plate bend and the kinematics figure has been set up.
    研究板料弯曲过程中力臂和力矩的变化规律,通过数学运算与试验研究,建立了板料弯曲“U形”件的数学模型及弯曲过程的运动学图形。
    Conclusion Locked bone nail has advantages such as minor injury,little interference to periostei and long force arm during fracture fixation,etc.
    结论:带锁骨髓内钉具有损伤小,脊膜干扰小,骨折固定力臂长等优点。
 

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