Establishing an human spine dynamic model is an significan event to study spine injured biomechanics of pilot " s ejective injury, parachute opening, landing and study the endurance to impact loading on human spine. in this paper, the huston " s method of kane " s equations is developed so that it can be applied to the multibodysystem including translation between the bodyies. the dynamic model of human spine is provided basing on these theories, while the big movement of spine is considered. the deformation of vetebra is far smaller comparing with the intervetebra disc, so the spine is considered into multibodysystem including rigid bodies ( vetebra ) and the flexible bodies ( intervetebra disc ). the computer solution correspond with the results of the large scale human impact test. the rigid coefficient factors and the damping factor of intervetebra joints are obtained
人體脊柱動力學模型的建立對研究飛行員彈射救生、傘兵
跳傘開傘、著陸等脊柱損傷的生物力學以及研究人體脊柱耐受沖
擊載荷的極限問題都具有重要意義.首先發展了凱恩方程的休斯頓方法,使其可應用於變形體連接的多體系統,並以此理論為依據建立人體整椎脊柱沖
擊動力學模型,此時考慮脊柱的大位移運動,每個椎骨的變形相對椎間盤的變形小得多,把脊柱看成由剛體(椎骨)和變形體(椎間盤)組成的多體系統.並以大型真人坐姿沖
擊實驗結果進行了擬合,最後得到腰椎間關節剛度系數因子和阻尼系數因子
Helicopters in action " is about to take you on an adventure around the world from sierra leone, where you ll participate in delivering humanitarian aid in the largest helicopter in the world, to miami for a wild ride in a black hawk helicopter intercepting drug runners. hold on while you swing through the air with five marines dangling from a rope attached to a ch - 46 flying over the atlantic and swoon as a cobra swoops low over enemy territory. try not to slip as you traverse 500, 000 - volt high wires
全天域電影直升機行動組將會帶你參與周遊列國的歷險旅程:在非洲獅子山你會乘坐全球最大型的直升機協助人道救援工作在美國邁阿密,你會登上黑鷹直升機截
擊毒販又或者與五名美國海軍陸戰隊隊員一起乘坐ch - 46直升機,飛越大西洋上空,並在半空游繩而下或乘坐眼鏡蛇直升機在敵方領空低飛或登上直升機,
跳上500 , 000伏特高壓電纜上進行維修工程或屏息靜氣,緊隨獸醫在南非乘坐直升機在離地面3米的高度,向黑犀牛發射麻醉槍或乘坐直升機
跳入驚濤駭浪中參與海難救援工作。
Operations guide : mobile keyboard keys z a jump shooting
操作指南:鍵盤方向鍵移動a
跳躍z射
擊
Let them praise his name with dancing ; let them sing praises to him with timbrel and lyre
詩149 : 3願他們
跳舞贊美他的名、
擊鼓彈琴歌頌他。
As the evening grew late, norton, smarting under the repeated charges of being a metaphysician, clutching his chair to keep from jumping to his feet, his gray eyes snapping and his girlish face grown harsh and sure, made a grand attack upon their position
夜色漸深,諾爾屯受到了反復的攻
擊,他們說他是個官學鬼,把他刺痛了,諾爾克怕自己會
跳起來,忙攥住了椅子他灰色的眼睛閃亮著,姑娘一樣的面孔變得嚴厲而堅毅了。
Operate guidebook : the ctrl attackstones for the big gun, the space attackstones for the nailhead hammer, the arrowhead acts, jumps up
操作指南: ctrl為大炮攻
擊,空間為釘頭錘攻
擊,箭頭行動、
跳躍。
Damping bearing is a kind of bearing with damping ring. it is not the same as traditional bearing not only on geometry but also on material. damping ring has many merits such as perfect abrasive resistance, good noise proof ability, good self - lubricating property, excellent resistance to impact and its life length is much longer
該類軸承為帶阻尼環的推力軸承,在結構和材料上
跳出傳統框架,陰尼環具有減振、抗噪、自潤滑、耐磨、耐沖
擊等功能,是傳統推力止推軸承壽命的數倍。
Ah hah, i the mighty de puce, your nemesis. . will soon triumph over your so - called army
啊哈,我就是強大的
跳蚤公爵,你的報應. . .很快就要
擊敗你所謂的軍隊。
Bungee jumping, skeet shooting, duck hunting, jerking off, playing pool,
蹦
跳,射
擊,打鴨,手淫,撞球
She jumped to her feet, her heart beginning again its sickening thudding and bumping.
她從地上呼地
跳了起來,心又怦怦地撞
擊起來。
Praise him with the timbrel and dance : praise him with stringed instruments and organs
擊鼓
跳舞贊美他,用絲弦的樂器,和簫的聲音贊美他。
Let them praise his name in the dance : let them sing praises unto him with the timbrel and harp
願他們一邊
跳舞,一邊贊美他的名,
擊鼓彈琴歌頌他。
As the blow still hung impending, i leaped in a trice upon one side.
當打
擊迫在眉睫時,我一下子就
跳到了一邊。
Left and right to control the direction of key figures in mobile, the space bar of the attack, the key to jump, jump on the space bar to jump attack
「左右」方向鍵控制人物移動,空格鍵為攻
擊, 「上」方向鍵為
跳躍,
跳躍中按空格鍵為
跳擊。
Introduction : left and right to control the direction of key figures in mobile, the space bar of the attack, the key to jump, jump on the space bar to jump attack
「左右」方向鍵控制人物移動,空格鍵為攻擊, 「上」方向鍵為跳躍,跳躍中按空格鍵為跳擊。