Samuel ting has spent more than two years in the ridicule and negative developed a high-resolution detectors, discovered the J particle, stir the physics world.

丁肇中花费了两年多时间在嘲笑和否定中研制了一架高分辨率的探测器，发现了J粒子，轰动了世界物理界。

youdao

A quantum property of the charm quark whose conservation explains the absence of certain strange-particle decay modes and that accounts for the longevity of the J particle.

分子量夸克粒子的一种量子属性，夸克粒子的存在说明了某些特别粒子腐蚀模式的缺乏，这也是J粒子存在时间长的原因。

youdao

The results show that the state estimation method based on improved particle swarm algorithm can be the best value, but a longer time, and the bad data can be detected by J(x) detection method.

结果表明基于改进粒子群算法的状态估计可以得到最优值，但时间较长，检测法可以检测出不良数据。

youdao

if I say a particle's location is i times t^2 plus j times 9t^3, for every value of time, you can put the numbers in and you can find the velocity by just taking derivatives.

一个质点的位置,i ? t^2 + j ? 9t^3,在每一个时间点,你可以把数值代入,并通过求导得到速度

耶鲁公开课 - 基础物理课程节选

If you are describing a particle with location R, the vector we use typically to locate a particle, R then R is just i times x + j times y, because you all know that's x and that's y.

如果你要描述一个位移为 R 的质点,这个矢量一般用表示质点 R 的位移,R 可表示为 i ? x + j ? y,显然你们都知道这段是 x,那段是 y

耶鲁公开课 - 基础物理课程节选