在对膝上假肢使用者健侧和残侧的步态进行检测的基础上，对健、残侧在步态周期内的地面反力、下肢运动和时相对称性进行了对比和分析，时相对称性差是膝上截肢者步态的主要问题。
Based on the data obtained from gait tests, the differences of ground reaction forces and the movements of lower limbs between the sound side and prosthetic side of above knee amputee were analyzed.
在运动涡旋相，电压的轨迹相对时间是周期性的，其振动频率与电流密度成正比。
In the moving vortex lattice phase the time dependent voltage is periodic with time, and the frequency of voltage is proportional to the current density.
编队卫星相对距离较大，非线性因素不可忽略时，利用非线性周期运动条件，可找到不需消耗任何燃料的周期性相对运动轨道。
When the relative range was large and the effects of nonlinearity could not be neglected, the nonlinearity periodic relative rotating orbits could be found using the nonlinearity initial conditions.
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