Singularity loci analysis of a planar parallel manipulator with revolute actuators 一种平面并联机械手的奇异形位分析
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Dynamic simulation and kinetic description of revolute joint with spatial clearance 圆柱铰间隙运动学分析及动力学仿真
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Capsule ovoid , 6 - 8 mm long , more or less glandular hairy , coarsely tuberculate ; persistent calyx lobes often revolute and shrinking 蒴果卵圆形,长6 - 8毫米,多少被腺毛,有粗糙的小疣状凸起;宿存花萼裂片常反卷和皱缩。
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Specially , this new mode will surely revolute the architecture of control systems so that they can be more open and perform better 当然,将这种新模式应用到自动化领域中,也势必促进控制系统体系结构的变革,使其具有更高的性能和更具开放性。
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Leaves leathery , elliptic - lanceolate or broadly oblanceolate , 4 - 13 cm long and 2 - 4 cm wide , apex acuminate to acute , base cuneate , margin revolute ; petioles 0 . 7 - 1 . 5 cm long , base slightly swollen 叶革质,椭圆状披针形或阔倒披针形,长4 - 13厘米,宽2 - 4厘米,顶端渐尖或急尖,基部楔形,边缘背卷;叶柄长0 . 7 - 1 . 5厘米,基部稍肿大。
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Traditional editorial - publication procedure can no longer fulfill the time and effectiveness demands to the journals . academic journals have to revolute this publication model and decrease the time period for publication in order to better serve the knowledge renovations 随着社会高度发达对信息传播要求的提高,传统的编辑出版流程已经越来越不能适应期刊出版对时效的要求,学术期刊只有通过变革已有的出版模式,缩短出版周期,才能更好地为知识创新服务。
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Iv ) revolute joint element , nonlinear spring - damper element , 3 - d 5 points contact element are applied to simulate the revolute restriction between two caterpillar boards , suspension nonlinear vibration , contact between wheels and caterpillar boards , and contact between caterpillar boards and ground are considered respectively . drucker - prager material is employed to simulate reinforced concrete 4 、应用大幅度转动约束单元、非线性弹簧阻尼单元、三维五节点接触单元分别模拟自行火炮履带板之间的转动约束连接、悬挂非线性振动及负重轮与履带板之间的接触和履带板与地面的接触问题;根据材料非线性理论,提出利用drucker ? prager材料建立土壤的非线性有限元模型。
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1 . reconstruction of practical strategy , establish and improve the current cooperation system , normalize the cooperation management structure , construct the balance share , normalize the decisions system , absorb the independent board system , revolute the economic and management system of government . the key task of government is to improve the law environment 在深入研究与探讨的基础上,提出了相应的对策建议: 1 、实行战略重组,建立和完善现代企业制度,规范公司治理结构,构建相对制衡的多元化股权结构;规范决策机制、引入独立董事制度;变革政府的经济管理模式,政府的重点任务是完善法律环境。
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The analysis of precision about mould - cut main mechanism with clearances is advanced . on the basis of analysis of slider displacement error influenced by the crank length tolerance , the coupler length tolerance and clearances in revolute joints for mould - cut main mechanism , some reasonable suggestions about tolerance distribution of bars length and fitting precision of joints are put forward 考虑运动副间隙对主切机构进行了精度分析,通过分析主切机构中各杆长误差和运动副间隙对滑块位移误差的影响,对商标模切机设计初期杆长误差分配和运动副间隙配合精度提出了合理的建议。