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Mechanics in Engineering    2018, 40 (4): 469-476.   DOI: 10.6052/1000-0879-18-087
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Mechanics in Engineering    2018, 40 (2): 236-238.  
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Mechanics in Engineering    2018, 40 (2): 239-243.   DOI: 10.6052/1000-0879-17-042
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Mechanics in Engineering    2018, 40 (1): 106-107.  
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Mechanics in Engineering    2018, 40 (1): 108-111.   DOI: 10.6052/1000-0879-17-155
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Mechanics in Engineering    2018, 40 (1): 111-115.   DOI: 10.6052/1000-0879-17-033
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null    2014, 36 (4): 517-519.   DOI: 10.6052/1000-0879-13-380
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null    2014, 36 (4): 524-526.   DOI: 10.6052/1000-0879-13-448
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REVISIT OF SELF-STABILIZATION OF UNMANNED BICYCLE
LIU Yanzhu
Mechanics in Engineering    2020, 42 (1): 116-118.   DOI: 10.6052/1000-0879-19-027
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The realization of an unmanned self-stabilizing bicycle is discussed. A stability analysis is made for a mathematical model of a bicycle controlled by the rotation of the front set. It is shown that the self- running bicycle can be asymptotically stabilized only when the damping factor in the rotation axis of the front set is considered, and the input signals of the control system should contain the angular velocity of the side-leaning of the bicycle.
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TWO CORE ISSUES OF BIOMECHANICS1)
QIAO Aike
Mechanics in Engineering    2020, 42 (1): 119-123.   DOI: 10.6052/1000-0879-19-324
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The biomechanics is the science of applying the mechanical principles and methods to quantitatively study mechanical problems in organisms. This paper points out that the constitutive relationship and the stress-growth relationship are the two core issues in the biomechanics. The meaning of the constitutive relationship can be explained by using three examples: the "blood is thicker than water", the "artery hardening" and the "bone under loading"; and the meaning of the stress-growth relationship can be explained by using other three examples: the "bone growth", the "hard Qigong" and the "hypertension and cardiovascular diseases".
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