truss bow
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Only two strings of the erhu playing is highly rich in the left hand there Vibrato, harmonics, vibrato, portamento, pizzicato, wheel means; right hand, even the bow, sub-bow, Dayton bow, jumping bow, trembling bow, flying bow, broken bow and so on.
只有两根琴弦的二胡的演奏手法十分丰富,左手有揉弦、泛音、颤音、滑音、拨弦、轮指;右手有连弓、分弓、顿弓、跳弓、颤弓、飞弓、碎弓等。
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Holding the bow is like a teeterboard supported by thumb as the pivot and the cooperated forcing of forefinger and little finger produces a moment M. The "P-x-M Line Method" shows when playing a down bow, M increases with x and gradually changes its direction and this process is determined by P, the gravity and barycenter of bow. The "P-x-F Plane Method" shows that the most force-saving bowing path should locate in the lower part of this plane. The analyses of "Helmholtz Motion" and "Schelleng Diagram" indicate P and its range is in direct ratio with volume, velocity of bow, the approaching degree of the bow to the bridge and has some relationship with the quality of string and bow.
国内近期出现了用物理模型来研究小提琴运弓问题的尝试本文第一部分首先指出握弓类似于一个以***(F3)为支点的跷跷板,主要以食指(F1)和小指(F2)的施力配合,产生握弓力矩M;随后用"P-x-M直线法"证实:演奏下弓是M随的***而逐渐增大并转换方向的***,此***取决于P、弓的重力和重心;并首创"P-x-F平面法",在x,F1,F2空间中证实:省力的运弓路径应在该平面中处于较低的位置第二部分通过分析"赫尔姆霍茨运动"和"Schelleng图表"指出:P及其变化范围和音量、弓速、弓与琴码的接近程度成正比,并与琴弦和弓自身的性质有关
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The variable geometry truss mechanisms have been studied extensively and systematically by this project. The research plan has been completed all sidedly, and expected results have been obtained. Three new kinds of combination decahedrons and a new class of variable geometry truss mechanism, which is composed of an octahedron and three tetrahedrons connected in parallel form, are proposed. The position analyses for decahedrons, dodecahedrons, triple-octahedrons, combinations decahedron and a new type of structure of variable geometry truss mechanisms are presented by introducing additional extra linear displacement sensors and using resultant elimination and homotopy continuation algorithms. The method of kinematical analysis of variable geometry truss mechanisms is established.
课题组对变几何桁架机构进行了深入的研究,全面地完成了研究计划,取得了预期的成果;提出了三种新的十面体组合机构以及由一个八面体和三个四面体组成的新型变几何桁架机构的结构形式;应用结式消元、附加传感器和同伦方法等提出了十面体、十二面体、三重八面体、组合十面体和新型变几何桁架机构的位置分析方法;建立了变几何桁架机构运动分析的一般方法;建立了简洁的凯恩和拉格伦日动力学的模型;应用有限元和子结构方法,提出了变几何柞架机构弹性动力学模型,导出了逆动力学方程的显式形式;设计和研制了一台可折叠的八面体变几何杵架机构装置等。
- 更多网络解释 与truss bow相关的网络解释 [注:此内容来源于网络,仅供参考]
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这低头的外表和工程就像低头你爸爸或grampa开始:This bow looks and works just like the bow your Dad or Grampa started with
Features: 特点... | This bow looks and works just like the bow your Dad or Grampa started with.这低头的外表和工程就像低头你爸爸或grampa开始. | This bow works for both right AND left handed这低头工程都...
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howe truss:豪式屋架
钢木屋架 composite truss | 豪式屋架 Howe truss | 半屋架 semi-truss
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queen post truss:双柱屋架
梯形屋架 trapezoid truss | 双柱屋架 queen post truss | 单柱屋架 king post truss