姿态

There is a small action range in archery.Simple methods and analysis is inadequate,so the author,on the basis of testing the archery athletes in national team with the Qualisisy infrared photoelectric testing system,Footscan sole pressure testing system,Noraxon myoelectricity remote testing system, etc,analyzes comprehensively the action technique of the athletes in national team from the posture,body motion characteristics,body posture equilibrium and stability,distribution of centre sole pressure, myoelectricity characteristics,etc,with the methods of relative software and data statistics.The conclusions and the suggestions are as follows:Conclusion:Firstly,the communality of posture angle,muscle strength,the activation order of main muscle during raising the bow, raising the bow and the timing of the raising could be used as the evaluation index of technique action in archery;Secondly,the length of the time needed in the different periods couldn\'t be used as technique evaluation index since it has no relation with the result.But the time of raising and pulling back the row is relatively fixed,and the time has a positive relation with the archery achievement of the national team in China.Thirdly,the central index of the sole pressure could be used as the reference criterion of selecting athletes and forecasting achievement.During playing archery,the interrelation between the central index of the sole pressure and the achievement is different individually and in different periods.Fourthly,there is low stability of the archery athletes in the front and back direction during the action, caused by the athletes\' posture disequilibrium of dorsal abdominal muscle and non-professional sport shoes..Fifthly,kinematics and electromyography shows that the people on archery in China haven\'t taken the raising and pulling back the row seriously.

射箭的肢体动作幅度小，简单的手段和分析不能满足其需要，笔者结合各种运动生物力学仪器优点及射箭项目的特性，选用Qualisisy红外光点测试系统、Footscan足底压力测试系统、Noraxon肌电遥测系统等对国家队射箭队运动员进行多方位的测试，运用相关软件及数理统计方法，对运动员的射箭动作技术，从射箭动作的姿态构架、肢体运动特点，身体姿态平衡稳定性、足底压力中心分布、肌电特性等进行全面分析，结论及建议如下：结论：第一，姿态角、肌肉用力激活程度、举弓阶段主要用力肌肉激活顺序、举弓、开弓时间等的一致性可作为射箭技术动作评价指标；第二，各动作阶段所用时间的长短不能作为技术评价指标，但举、开弓的时间相对较固定，开举弓时间比与中国国家队射箭成绩正弱相关达到显著性；第三，闭眼状态下足底压力中心单位面积轨迹长与144支箭最好成绩正相关达到显著性，可作为身体素质、选材及成绩预测的参考依据；实射时身体平衡的足底压力中心指标与成绩的相关程度具有个体性差异、阶段性差异；第四，射箭运动员实射时身体在前后方向上的稳定性较差，这与运动员的站立姿态、腹背肌力量的不匹配以及射箭没有专业运动鞋有关；第五，运动学及肌电学都表明中国射箭训练对举弓、开弓阶段的重视不够，背部肌肉用力特征不明显，撒放技术合理性不高。

The research on the CCD sensor information is used to determinate the satellite attitude system without gyroscope .(1) Using quaternion and MRP as attitude representation , the attitude kinematics function are established . The satellite attitude dynamics function is established,that is disturbed by the first-order Markov force moment.(2) Using the quaternion as attitude representations, the attitude determination state estimator EKF and UKF are designed , numerical simulation is done .

基于CCD星敏感器的无陀螺测量卫星姿态确定系统的研究(1)针对地球同步轨道卫星，分别建立了以姿态四元数和修正罗德里格参数为卫星姿态描述参数的姿态运动方程；建立了卫星受一阶马尔柯夫干扰力矩时的卫星姿态动力学方程；(2)设计了采用姿态四元数为卫星姿态描述参数的EKF和UKF估计器，设计了分别以姿态四元数和修正罗德里格参数为卫星姿态描述参数的UKF估计器，并进行了数学仿真。

The so called indirect integral operation means that Eular angles can be gotten from the direction cosine matrix which is received by the integral operation of quaternions or direction cosine.

飞行器导航中，姿态角的获取可以通过直接或间接的积分运算求得的，所谓间接获取即是指通过四元数或方向余弦的积分运算求得姿态矩阵，再从姿态矩阵中提取姿态角。

Finally, fusion decision is adopted to get the final result of face recognition based on the intermediate result of every class.

摘要该文提出了基于层次模型和融合决策的多姿态人脸识别技术，它首先把各人脸按姿态分成几个大类，并且对各大类按人脸个体分成相应子类，然后对各个大类分别进行基于特征脸的人脸识别，最后对各个姿态的人脸识别中间结果进行融合决策得到真正的人脸识别结果，该算法同时也提供了其姿态识别结果，并且大大减小了耗时，该文算法对ORL，UMIST，Stirling数据和一些自拍数据共1200幅人脸图像进行了识别测试实验，其结果令人鼓舞。

The concept and algorithm for nonsingular orientation-workspace of the platform at a certain position are proposed.

提出了该机构处于给定位置时的非奇异姿态工作空间概念及其算法，并以非奇异姿态工作空间边界曲面的最小内切球作为实际姿态工作空间，以该球半径大小作为衡量机构处于给定位置时的实际姿态能力的性能指标。

Tactical Aiming Skills rapid fire would cancel any of these abilities are all toggelable except 4 and 5 only 1 at a time. Moving would untoggle the abilty

战术瞄准姿态除了4，5级的被动技能以外，快速开火将会取消狙击手的这种姿态，并且一次只取消一个姿态，移动的话将会将会完全解除这个姿态

Life is a kind of stance, and people oneself is the fleshiest kind in life stance, no matter people express stance or stance express people. Ancient Chinese said " prestige from cloth, horse depend saddle", it is the source of a idiom " attire animals".

生活是一种姿态，而姿态中最活色生香的是人本身，用人来表现姿态还是用姿态来体现人，除了内在，就是人的外在了，所以才有了中国人所谓的&人靠衣服马靠鞍&，才有了所谓的&衣冠禽兽&。

The orientation-singularity expression of the Stewart platform is deduced by using unit quaternion which can avoid singularity when using Euler angles to represent the orientation of rigid body, and then the algorithm of orientation-workspace of the manipulator at a certain position is proposed.

基于单位四元数描述的刚体姿态，避免了欧拉角等描述刚体姿态的奇异性问题，推导出Stewart机构处于给定位置时的姿态奇异解析表达式，并提出了该机构处于给定位置时的姿态工作空间算法，通过计算机仿真给出该机构处于一给定位置时姿态奇异轨迹和姿态工作空间的三维可视化描述。

First of all, the scheme of attitude stable control system is put forward, then attitude sensors, attitude determination arithmetic and implement devices are introduced. Lastly, reaction wheel system is studied and simulated.

首先给出了姿态稳定控制系统的总体方案；然后具体介绍了本系统所采用的姿态敏感器、姿态确定算法和执行机构；最后对以反作用飞轮为执行机构的姿态主动稳定系统进行了研究，并结合前面设计的控制律进行了仿真。

The application of the survey model in the survey tests on a shield machine manufactured by Herrenknecht A.G.

盾构机姿态控制点测量首先要建立测量模型，即采用导线测量和三角高程测量方法，通过对盾构机刀头和中体圆柱体外直径精密测量，拟合计算出盾构机刀头和中体中心三维坐标，建立盾构机坐标系统，解算姿态控制点在盾构机坐标系统内的三维坐标，进而由姿态控制点计算盾构机的姿态。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。