Baseball best hitting point model research based on momentum medium theorem

Yong Li

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Baseball best hitting point model research based on momentum medium theorem

机译：基于动量介质定理的棒球最佳击球点模型研究

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Every batter knows that there is a best hitting point in the rough part of baseball bat, when ball hits in such point, it can obtain largest energy. This paper applies dynamics knowledge to make respectively force analysis of hitting process baseball and bat, when it occurs to completely non elastic collision, baseball best hitting point in one end of bat. Research shows baseball best hitting point is between bat one end and far from baseball one end S area.When bat is hollowed out, itsmass reduces, elastic variable increases, according to Hooke???s law F ???? kx it can get baseball and bat elastic force increase, bymomentumtheorem ( ) 2 1 Ft ???? m v ???- v , it is clear that baseball escape speed increases. When bats textures are different, utilize control variables methods to carry on simulation experiment, it gets when baseball and aluminum bat collide, elastic coefficient is larger than that when baseball and wood bat collide.Apply return energy and total collision energy percentage formula 2(1 ) 0 2 i i i i W ???? k z ????k ???- z , it gets that aluminum bat rigidity is larger than that of wood bat, therefore use metal bat will reduce major league baseball challenge, so that explain the reason ofmajor league baseball prohibiting using metal bat.

机译：每个击球手都知道，在棒球棒的粗糙部分有一个最佳的击球点，当球击中该点时，它可以获得最大的能量。本文运用动力学知识分别对击球过程中的棒球和球棒进行力分析，当发生完全非弹性碰撞时，棒球的最佳击球点在球棒的一端。研究表明，棒球的最佳击球点位于球棒的一端与远离球棒的一端S区域之间。当球棒挖空时，其质量减小，弹性变量增加，根据胡克定律F ????。 kx它可以使棒球和蝙蝠的弹力增加，bymomentumtheorem（）2 1 Ft ???? m v ???-v，很明显，棒球逃生速度增加了。当球棒质地不同时，利用控制变量方法进行模拟实验，得出棒球和铝棒发生碰撞时的弹性系数要大于棒球和木棒发生碰撞时的弹性系数。应用返回能量和总碰撞能百分比公式2（1 ）0 2 iiii W ???? k z ??? k ???-z，得到铝棒的刚度大于木棒的刚度，因此使用金属棒将减少美国职棒大联盟的挑战，从而解释美国职棒大联盟禁止使用金属棒的原因。

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《BioTechnology: An Indian Journal》 |2014年第4期|共6页
作者
Yong Li;
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中图分类生物工程学（生物技术）;
关键词
Medium theoremDynamics force analysisMomentum theoremSimulation experiment model;

机译：中定理动态力分析动量定理模拟实验模型;

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专利

1. Baseball best hitting point model research based on angular momentum conservation and elastic beam model [J] . Tao Zhang BioTechnology: An Indian Journal . 2014,第4期

机译：基于角动量守恒和弹性梁模型的棒球最佳击球点模型研究
2. The Pythagorean Theorem of Baseball and Alternative Models [J] . Michael A. Jones, Linda A. Tappin The UMAP Journal . 2005,第1期

机译：棒球的勾股定理和其他模型
3. HMM-based ball hitting event exploration system for broadcast baseball video [J] . Hua-Tsung Chen, Chien-Li Chou, Wei-Chin Tsai, Journal of visual communication & image representation . 2012,第5期

机译：基于HMM的棒球垒球击球事件探索系统。
4. ANALYSIS OF ANGULAR MOMENTUM THE WHOLE BODY DURING GLIDE HITTING AND KICK HITTING IN BASEBALL [C] . Wu-Chen Lin, Tzu-Lin Wong, Jin-Cherng Wang, International Symposium on Biomechanics in Sports vol.1; 20050822-27; Beijing(CN) . 2005

机译：滑行命中和踢中命的全身体角动量分析
5. Modeling dependence and limit theorems for Copula-based Markov chains. [D] . Longla, Martial. 2013

机译：为基于Copula的马尔可夫链建模依赖关系和极限定理。
6. Physical Modeling of Activation Energy in Organic Semiconductor Devices based on Energy and Momentum Conservations [O] . Ling-Feng Mao, H. Ning, Changjun Hu, -1

机译：基于能量和动量守恒的有机半导体器件中活化能的物理建模
7. This article presents a new numerical model describing the behaviour of a thermally thick wood sample exposed to high solar heat flux (above 1 MW/m2). A preliminary study based on dimensionless numbers is used to classify the problem and support model building assumptions. Then, a model based on mass, momentum and energy balance equations is proposed. These equations are coupled with liquid-vapour drying model and pseudo species biomass degradation model. By comparing to a former experimental study, preliminary results have shown that these equations are not enough to accurately predict biomass behaviour under high solar heat flux. Indeed, a char layer acting as radiative shield forms on the sample exposed surface. In addition to this classical set of equations, it is mandatory to take into account radiation penetration into the medium. Furthermore, as biomass contains water, medium deformation consecutively to char steam gasification must also be implemented. Finally, with the addition of these two strategies, the model is able to properly capture the degradation of biomass when exposed to high radiative heat flux over a range of sample initial moisture content. Additional insights of biomass behaviour under high solar heat flux were also derived. Drying, pyrolysis and gasification fronts are present at the same time inside of the sample. The coexistence of these three thermochemical fronts leads to char gasification by the steam produced from drying of the sample, which it is the main phenomenon behind medium ablation. [O] . Pozzobon, Victor, Salvador, Sylvain, Bézian, Jean Jacques 2018

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8. Basing a Modeling Environment on a General Purpose Theorem Prover [R] . Archer, M. 2006

机译：基于通用定理证明器的建模环境

Baseball best hitting point model research based on momentum medium theorem

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