Before the second cash , the safety mechanism benefit occupant to safe condition . the safety mechanism is very cheap and it can be bought by most consumer . based on the multi - body dynamics roberson - wittenburg formula , a mathematical modle of the " occupant - seat - safety mechanism " system was built , and its kinematic equation was given . the corresponding computer programme was based on the equation , kinematic equation can provide advice for safety mechanism and serve for computer imotion . r / w and kane set up their own formula . they both can prove safety mechanism is benfit to occupant 为了研究人体的伤害机理，选择适当的人体模型作为研究对象；人体采用二维多刚体铰接模型，将人体简化为骨盆、躯干、头部、大腿、小腿、脚部、上臂和前臂八个刚体，而相应的七个关节腰、颈、髋、膝、踝、肩和肘，均简化为带有扭力弹簧和转动阻尼的铰链。
The nonlinear refractive index of these two of nickel one - nuclear complexes were determined as 6 . 95 x 10 - 11 m2 / w and 3 . 466 x 10 - 10m2 / w according to the experimental data of z - scan curve under 488 . 0nm laser . the value of nickel one - nuclear complexes is 4 ~ 5 orders of magnitude lager than some ordinary inorganic materials . these materials would have a good prospect in optical limiting applications 从z扫描曲线的实验数据处理得到这两种镍单核配合物材料在488 . onm的连续光作用下的非线性折射率分别为6 . 95xlo一‘ ’ mz / w和3 . 4 “ x10一’ “澎/ w ，其值比通常的无机材料大4一5个数量级，是一种很有应用前景的新型光学限幅材料。
It was found that ball milling the precipitates and the reduced w - cu powder can further reduce the particle size and improve the distribution of w and cu ingredients in the final w - cu powder . this results in both the increase of sintered density and property , and the improvement of microstructure of the w - cu composites 其中，共球磨处理的w一cu复合粉末( hp一m )压坯在1150下烧结90min所获烧结体具有最好的烧结性能，其硬度、抗弯强度和电导率分别为325 . 58mpa 、 1106 . 62mpa和42 . 99 % 。
Second , we discuss the minimum quality of condition numbers of ad , w and the singular linear systems . third , since condition numbers can not be computed exactly , we give the definition of the condition number of the condition number to know the sensitivity of the problem " compute the condition number " 再次，由于条件数不能被精确计算， demmel提出了条件数的条件数这个概念，我们定义了加权drazin逆和奇异线性方程组的加权drazin逆解的条件数的条件数，并给出它的界。
Moreover , compared with the channel with no hole baffle , the channel with hole ' s baffle , because the change of structure of the baffle , flow resistance reduced , the drop of flow pressure reduced as follow , the d / w , sl / w and s2 / w also influenced the channel ' s heat transfer 并且，对于设置开孔折流板的通道，相对于设置未开孔折流板通道来说，由于折流板表面的变化，减小了流体流过时的阻力，进而降低了流体流动压损，无量纲孔径d w 、无量纲水平中心距s1 w和无量纲垂直中心距s2 w等多个参数对通道换热均有一定的影响。
