著地

The results were as follows.(1) In the backward handspring, the trajectory of CM and horizontal velocity of CM in junior-high and college gymnasts were lower and higher than those of senior-high gymnast, so the vertical velocity is better when they perform tucked backward somersault. College gymnast has higher vertical velocity than junior-high and senior-high gymnasts in take-off moment of backward handspring phase.(2) Senior-high and college gymnasts have more elbow and shoulder angle in take-off moment of backward handspring and tucked backward somersault phase. Therefore, angle of both arm is bigger for performing in hand push away phase in the backward handspring, and increased the reaction force with body in the tucked backward handspring.(3) College gymnast has large knee flexions in hand support and push away moment in the backward handspring, it would increase rotation radius and better moments of inertia in the backward handspring.

结果显示：在后手翻阶段中，较低的重心轨迹和较高的水平速，有於后续空翻的垂直速；大专选手在后手翻阶段起跳瞬间有较高的垂直速；高中及大专选手在后手翻起跳脚地瞬间和团身后空翻起跳脚地瞬间时，肘、肩关节角皆大於国中选手，使其在后手翻起跳地瞬间时，双臂的伸展於后手翻的手推地面的动作，而团身后空翻起跳脚地时，双臂向上摆於身体向上伸展方向的掌握，并使重心有一定的腾空高；大专选手在后手翻阶段的手著地瞬间和手地瞬间的膝关节角较大於高中和国中选手，使其可增加身体的旋转半径，并能获得较佳的下摆动能，而膝关节角小则形成屈膝的动作，导致重心水平速低，减少下摆动能和影响整体动作的节奏和韵。

The center of pressure displacement in the lace-up group is bigger than other two groups.

四、赤足组其著地期下肢长度变化量显著大於Lace-up组（P＜。05），且Lace-up组其著地期下肢劲度和踝关节劲度皆大於赤足组（P＜。05）。

A mother and rescue team found her, she was dead already, and was crushed to death a meltdown in the house, through a pile of rubble that the gap can be seen She died posture, knees knees, the whole upper part of the body匍匐着forward, holding his hands to support the body, and some, like the ancients line faldstool ceremony, but the body was distorted pressure.

一位母亲，抢救人员发现她的时候，她已经死了，是被垮塌下来的房子压死的，透过那一堆废墟的的间隙可以看到她死亡的姿势，双膝跪著，整个上身向前匍匐著，双手扶著地支撑著身体，有些象古人行跪拜礼，只是身体被压的变形了。

The Lace-up group's center of pressure displacement quantity is bigger than other two groups,therefore its balance ability is also bad, therefore suggested the athlete when wearing ankle braces sports should inquire specialized doctor and the protection suggestion avoids injury.

人体在穿戴不同踝部护具执行单脚著地后迅速推蹬动作时， Lace-up和Air stirrup这两种护具在著地期间确实具有限制关节活动度的效果，但也因踝关节跖屈能力的下降造成人体著地时缓冲地面冲击力能力下降的现象，造成本研究结果在地面反作用力垂直分力Lace-up和Air stirrup组都较赤足组来的较大，著地时脚的负荷率Lace-up组和Air stirrup组都较赤足组来的较大，且Lace-up组在著地期压力中心偏移量也较其他两组大，故其平衡能力也有差异，故建议运动员在穿著踝部护具运动前应询问专业医师及防护员的建议以避免因此而受到伤害。

And she tried to curtsey as she spoke--fancy curtseying as you're falling through the air!

一边说著，她还一边行了一个屈膝礼——上不著天下不著地的，悬空的屈膝礼还眞有点莫名其妙！

Friction decreases when the surface becomes softer. But it increases as the surface becomes harder appears ahead of time relatively. Barefoot land hip joint angle displacement and angular velocities is it wear shoes land the hip joint to greater than or not in shoes of putting on. Total landing time, a stream of straight skin and sura skin muscle shrink, act and resist the skin group short of moneyly, and the length is shortenned when the skin muscle shrank before a stream of bicepses and shin bones, it is the function skin group.

髋关节、膝关节与踝关节之角度、角位移、最大角速度、垂直分力第一峰值与第二峰值、50ms被动冲量都会随著著地表面材质的软化而变小；而著地在硬地表面，冲击的力量会随著增加，相对地第一峰值时间会随著提早出现，在穿鞋与否和著地材质交互作用下，赤足著地髋关节角位移与角速度都大於穿鞋著地髋关节。

In-line skating jump landing was similar to stop-jump landing. Stop-jump consists of a 2-3 steps approach run and a two-footed landing followed by two-footed takeoff to maximum height and two-footed landing again. However, no study has been involved to investigate the second two-footed landing after the takeoff.

直排轮跳跃著地动作与双脚急停跳跃著地相当类似，双脚急停跳跃是在两到三步的跨步助跑后，以双脚著地后立刻起跳，跳至最高后再以双脚著地。

Toe spring and heel tread. See shoe on level surface and check for normal toe spring and heel tread.

鞋尖翘度及鞋跟著地，将鞋放在水平面上检查鞋尖翘度正常及鞋跟著地。

In the twinkling of landing, such Biceps femoris long head and Tibialis anterior worked, after the hell land, Rectus femoris is activated and will also increase in advance, shake with subduction, Gastrocnemius lateral head has been shrinking steadily all the time after landing, has produced the function regulated.

在著地的瞬间，股二头肌与胫骨前肌等伸肌起了作用，脚跟著地后，股直肌群肌肉预先活化亦会增加，以减除震荡，腓肠肌在著地后一直稳定地收缩，产生调节的作用。

Therefore, the in-line skating boots with well cushioning could reduce the landing impact and reduce the falling injury while the human use the landing strategies to keep stability.

直排轮跳跃著地会有较大的髋关节活动与较小的膝关节活动，使著地更加稳定以减低发生跌倒伤害的机会。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。