This paper describes an effective methodology for evaluation of the suspension parameters intended to be used for a terrain vehicle. The objective of this approach is to make quick analyses of the sensitivity of the v...This paper describes an effective methodology for evaluation of the suspension parameters intended to be used for a terrain vehicle. The objective of this approach is to make quick analyses of the sensitivity of the vehicle suspension parameters. For the purpose of developing such a methodology, a mathematical modeling of a quarter vehicles suspension system is developed. Sensitive analysis of the suspension parameters is performed by employing the standard deviation of the vehicle body acceleration, dynamic tire load, and suspension travel. Sensitivity analysis results have shown that the spring stiffness, damping coefficient, tire stiffness and sprung mass have substantial influence on the ride comfort and road holding, while un-sprung mass on the other side has much lower impact in performance of the vehicle suspension system.展开更多
Background：The main goals of flexor tendon surgery are to restore digital motion by providing tendon healing and to preserve tendon gliding.Our purpose was to investigate the effects of 5-fluorouracil （5-FU） on ten...Background：The main goals of flexor tendon surgery are to restore digital motion by providing tendon healing and to preserve tendon gliding.Our purpose was to investigate the effects of 5-fluorouracil （5-FU） on tendon adhesions in partially divided profundus flexor tendons （flexor digitorum profundus [FDPs]） following surgical repair and in partially divided FDPs without surgical repair,and to compare the results of the repair versus the nonrepair of zone two injuries via macroscopic and biomechanical evaluations of tendon adhesions.Methods：We used 32 adult male European rabbits （Oryctolagus cunniculus） weighing from 2.5 to 3.5 kg.The study was performed on the deep flexor tendons of the second and third digits of the right hind paws of the rabbits;thus,a total of 64 tendons were examined in this study.Results：Based on the results achieved in our experimental study,the load （N） significantly increased in subgroup 1a in which the tendons were surgically repaired and were not treated with 5-FU compared with subgroup 2a in which tendons were surgically repaired and treated with 5-FU.Conclusions：The load （N） significantly increased in subgroup 1 a in which the tendons were surgically repaired and were not treated with 5-FU compared to subgroup 2a in which the tendons were surgically repaired and treated with 5-FU.Therefore,these results revealed a decrease in adhesion formation in the subgroup that was treated with 5-FU due to increased resistance to tendon adhesions during their excursion through the tendon sheath,which in this case required greater traction force.展开更多
文摘This paper describes an effective methodology for evaluation of the suspension parameters intended to be used for a terrain vehicle. The objective of this approach is to make quick analyses of the sensitivity of the vehicle suspension parameters. For the purpose of developing such a methodology, a mathematical modeling of a quarter vehicles suspension system is developed. Sensitive analysis of the suspension parameters is performed by employing the standard deviation of the vehicle body acceleration, dynamic tire load, and suspension travel. Sensitivity analysis results have shown that the spring stiffness, damping coefficient, tire stiffness and sprung mass have substantial influence on the ride comfort and road holding, while un-sprung mass on the other side has much lower impact in performance of the vehicle suspension system.
文摘Background：The main goals of flexor tendon surgery are to restore digital motion by providing tendon healing and to preserve tendon gliding.Our purpose was to investigate the effects of 5-fluorouracil （5-FU） on tendon adhesions in partially divided profundus flexor tendons （flexor digitorum profundus [FDPs]） following surgical repair and in partially divided FDPs without surgical repair,and to compare the results of the repair versus the nonrepair of zone two injuries via macroscopic and biomechanical evaluations of tendon adhesions.Methods：We used 32 adult male European rabbits （Oryctolagus cunniculus） weighing from 2.5 to 3.5 kg.The study was performed on the deep flexor tendons of the second and third digits of the right hind paws of the rabbits;thus,a total of 64 tendons were examined in this study.Results：Based on the results achieved in our experimental study,the load （N） significantly increased in subgroup 1a in which the tendons were surgically repaired and were not treated with 5-FU compared with subgroup 2a in which tendons were surgically repaired and treated with 5-FU.Conclusions：The load （N） significantly increased in subgroup 1 a in which the tendons were surgically repaired and were not treated with 5-FU compared to subgroup 2a in which the tendons were surgically repaired and treated with 5-FU.Therefore,these results revealed a decrease in adhesion formation in the subgroup that was treated with 5-FU due to increased resistance to tendon adhesions during their excursion through the tendon sheath,which in this case required greater traction force.
