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rotational acceleration
相关语句
  旋转加速
     This article demonstrated how the stress and strain varied in brain tissue effected by the load magnitude, load waveform, load frequency, load duration, linear acceleration, rotational acceleration, compounded linear/rotational acceleration, brain tissue, cerebral falx, cerebellar tentorium, skull and neck, and what are the relationships between these factors and the event of DAI.
     本文从生物力学角度综述了荷载量、荷载波形、荷载作用时间、直线加速、旋转加速、直线 /旋转复合加速、脑组织、大脑镰小脑幕、颅骨、颈部对应力应变产生及分布的影响 ,及与 DAI发生的关系
短句来源
  “rotational acceleration”译为未确定词的双语例句
     Methods In this experiment, DAI was induced by a rotational acceleration device in 16 Sprague-Dawley(SD) rats.
     方法 本实验应用瞬间旋转的致伤装置对16只Sprague-Dawley(SD)大鼠引发DAI。
短句来源
     An experimental and theoretical investigation on the transient response of a flexible rotor-SFDB(squeeze film damper bearing)system during passage through resonance is developed. It is found that the influence of the magnitude of rotational acceleration on the jump phenomena of this nonlinear rotor during passage through resonance is not obvious.
     本文经对一个柔性转子-SFDB(squccze film damper bearing,挤压油膜阻尼器轴承)系统通过共振时的瞬态响应进行试验研究和理论分析,认为:旋转角加速度的大小对此非线性转子通过共振时的跳跃现象的性质不产生明显影响,这说明,在实际的加速条件下,这一类转子系统通过共振时的跳跃现象是不能完全避免的.
短句来源
     Scheme of monitor unit of rotational velocity, rotational acceleration and zero rotational velocity
     转子转速度、转加速度和零转速度监测单元的设计
短句来源
  相似匹配句对
     The Acceleration of Maotai
     茅台加速度
短句来源
     Scheme of monitor unit of rotational velocity, rotational acceleration and zero rotational velocity
     转子转速度、转加速度和零转速度监测单元的设计
短句来源
     A digital detecting apparatus for measuring instantaneous rotational velocity and acceleration of Turbine
     涡轮机瞬时转速,加速度数宇式检测装置
短句来源
     Sense the Governmental "Acceleration"
     感受政府“提速”
短句来源
     Evaluation of rotational autokeratoplasty
     自体转位穿透性角膜移植的疗效评价
短句来源
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  rotational acceleration
Available data show a good correlation between observed rotational acceleration of the Earth and the motion of the mean pole over periods of about thirty years.
      
A Hamiltonian theory for an elastic earth: Secular rotational acceleration
      
Diffuse axonal damage is almost always related to mechanisms of injury in which the rotational acceleration produces shear and tensile strains of high magnitude.
      
Rotational acceleration has been obtained using a recently developed MEMS-based, low cost rotational accelerometer.
      
The flywheel stores the leg forces acting on the pedals as rotational energy and opposes any rotational acceleration.
      
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An experimental and theoretical investigation on the transient response of a flexible rotor-SFDB(squeeze film damper bearing)system during passage through resonance is developed.It is found that the influence of the magnitude of rotational acceleration on the jump phenomena of this nonlinear rotor during passage through resonance is not obvious.This fact is very important for the design of rotor systems with nonlinear dampers,which

本文经对一个柔性转子-SFDB(squccze film damper bearing,挤压油膜阻尼器轴承)系统通过共振时的瞬态响应进行试验研究和理论分析,认为:旋转角加速度的大小对此非线性转子通过共振时的跳跃现象的性质不产生明显影响,这说明,在实际的加速条件下,这一类转子系统通过共振时的跳跃现象是不能完全避免的.对上述转子系统通过共振时的力矩分析表明,由不平衡载荷等惯性力引起的惯性力矩是影响此系统通过共振时力矩变化的主要因素.

The objective of this study was to perform theoretical analysis involving the head-neck of 4 cases human head with sufficient precision and reliability so that a validation of the analytical model can be made for the impact situation,and to determine the skull-brain injury tolerance in the human head analysis from the engineering data obtained from the theoretical results.When the skull-brain is impacted directly,the brain also deforms and skull internal pressures increase at the site of local skull deformation.Research...

The objective of this study was to perform theoretical analysis involving the head-neck of 4 cases human head with sufficient precision and reliability so that a validation of the analytical model can be made for the impact situation,and to determine the skull-brain injury tolerance in the human head analysis from the engineering data obtained from the theoretical results.When the skull-brain is impacted directly,the brain also deforms and skull internal pressures increase at the site of local skull deformation.Research is currently being conducted by AISA to develop a comprehensive finite element method(FEM)representation of the entire head and neck capable of simulating the role of skull deformation,skull stresses,gross head motions,and stresses waves in the skull and brain.These parmaeters include translational and rotational acceleration,rotational velocities and contact forces,and procedures are now available to assess the complete dynamics response of the head in test dummies subjected to impact.Here,the main emphasis is an analysis of three dimensional FEM for skull-brain response to pact drawn on automatic formulated picture.

本文用三维有限元方法,分析颅脑在气流冲击载荷作用下非线性动力学响应问题。用核磁共振颅脑断层图象输入计算机,采用CT图象三维再现软件和非规则形体有限元网格划分软件进行计算,结果得到人体头部冲击波传递,颅脑损伤容限曲线,延髓损伤等,为宇航,交通事故,司法鉴定创伤判断,临床治疗提供科学依据。

Objective To define the biomechanic function of the shoulder in fast throwing movements in baseball pitching. Methods Using NAC high speed video and PIAS LA 555 computer system, overhand pitching movements carried out by 12 healthy Japanese professional baseball pitchers were analyzed in three dimensions. The pitching motion was displayed as stick to stick figures dynamically. Results Pitching motion was a combination of translational and rotational movements. Acceleration and deceleration, being two...

Objective To define the biomechanic function of the shoulder in fast throwing movements in baseball pitching. Methods Using NAC high speed video and PIAS LA 555 computer system, overhand pitching movements carried out by 12 healthy Japanese professional baseball pitchers were analyzed in three dimensions. The pitching motion was displayed as stick to stick figures dynamically. Results Pitching motion was a combination of translational and rotational movements. Acceleration and deceleration, being two typical motion patterns, worked sequentially through the anatomic link system from the pivot leg to the pitching hand. During the acceleration phase, the shoulder joint acted as a junction point and a fulcrum, supporting the rotational acceleration motion, shoulder forward flexion and elbow extension. According to the changing glenohumeral angles of the pitching shoulder, shearing force turned into tension force which worked on the anterior shoulder structures and then shifted to the posterior part of the joint. Conclusions In fast throwing motion, the shoulder functions as an important fulcrum to support the pitching arm during the acceleration phase. Avoiding excessive stress and shearing force on the joint components and enhancing coordination of muscle action are important to a successful throwing motion and the prevention of shoulder injury. Familial occurrence of hemangioblastoma of central nervous system $ Zhou Fanmin , Zhang Rong, Ji Yaodong , Xu Qiwu Zhou Liangfu and Shi Yuquan Objective To study the familial occurrence of hemangioblastoma of the central nervous system and to search for an effective way to diagnose and manage the disease. Methods From 1974 to 1993, six patients with hemangioblastoma with family history underwent surgical treatment at our hospital. Computerized tomography (CT) or magnetic resonance imaging (MRI) technique was used for the diagnoses before operation. Results Each patient had more than two relatives with hemangioblastoma. Multiple lesions were found in two of the six familial hemangioblastoma cases. All the patients recovered well after operation. So far, no victims have been discovered in the third generation. Conclusions The high occurrence rate of familial hemangioblastoma cases suggests an involvement of hereditary factors. We need a long follow up study on the descendants of familial hemangioblastoma patients. MRI is of diagnostic value in determining the location and nature of hemangioblastoma in both brain and spinal cord. A thorough examination is necessary for hemangioblastoma patients, and microsurgery is important in removing the tumor.

AbiomechanicalstudyoffastthrowingmovementsoftheshoulderinbasebalpitchingXueQingyun薛庆云andKeitaMasudaDepartmentofOrthopaedics,B...

 
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