Optimum velocity design and its application to race;
赛跑的最优速度设计及其应用
First, an optimum velocity model of the long or short distance race and an energy consumption model are set up on the basis of Newton s second law by analyzing the four physiological parameters for human body and wind force.
基于牛顿第二定律,首先通过对人体4个生理参数(最大冲力F;体内和体外的阻力系数τ;由O2的新陈代谢作用提供能量的速度ξ;体内储存能量的初始值E0)和风力R的分析,建立赛跑的最优速度数学模型与能量消耗数学模型;第二,利用微分方程的积分曲线与最优控制方法,结合普通极值方法和泛函极值方法,给出时间T一定的情况下的最大距离Dmax以及赛跑距离D一定的情况下的最小时间Tmin;第三,利用最小二乘法对上述生理参数进行拟合估计;最后,以某高等学校20多年的女子赛跑成绩为依据进行模型检验,找出理论值与实际纪录值的相对误差,从而为提高赛跑成绩提供了科学的依据。
The model of "race to learn" and factors are discussed in the paper, and then a model of factors analysis is given, to provide a new way to the research of knowledge alliance.
通过分析影响知识联盟知识转移的各种因素和联盟动态演进的过程,重新定义了知识联盟成功的含义,并根据“学习赛跑”的理论模型讨论了知识联盟演进过程中各类影响因素的作用,给出了研究知识联盟动态演进过程的因素分析模型,为研究知识联盟提供了新的思路和方法。
The paper is intended to explore the developing trend of men s 100m race in the world at the contemporary era and to offer some tentative advice to raise the level.
收集与整理了第２届世界田径锦标赛、第２４届奥运会和第３届世界田径锦标赛男子百米决赛前六名运动员的最高速度、步频、步长、分段时间和反应时等项参数进行了分析与研究，旨在探索当今世界男子百米赛跑发展趋势，为提高我国男子百米赛跑水平提供参考依据。
a cross-country run, race, etc
越野跑步、 赛跑等
A competition of speed, as in running or riding.
赛跑一种速度的比赛，如赛跑或赛车
To compete in a contest of speed.
比赛赛跑参加速度竞赛
Run, run, run your race As fast as you can go.
跑，跑，赛跑，跑出你最快的速度。
To compete against in a race.
赛跑在赛跑比赛中与…竞争
A course or track for racing, especially harness racing.
赛道赛跑中用的路或跑道,尤指赛马
The racers balloted for places by drawing straws
赛跑者抽签选择跑道。
The race got away to a fast start.
赛跑者起跑都很迅速。
I take part in the 100-metre race.
我参加100米赛跑。
Runners train for races.
赛跑者为比赛而锻炼。
finish line
(赛跑或赛马等的)终点线
the ending of a contest (as a race).
一种竞赛的结尾（如赛跑）。
In the race he literally "flew" round the track.
他在赛跑中简直像飞似地绕着跑道跑。
The runner breasted the tape, ie to win a race.
赛跑者以胸部触线（赛跑获胜）.
I think the 400-metre race will be more interesting than the 200-metre one.
我认为400米赛跑比200米赛跑更有意思。
she broke the record for the half-mile run.
她在赛跑中打破了纪录。
The winner of the race lays claim to the prize.
赛跑得胜者争取奖品。
enter a race, an examination
报名参加赛跑、 考试.