The questions involved are: concept of free particle,meaning of superposition principle,reason of assuming Hermitian operator,"interference of photons",identity principle and symmetrical postulat
讨论了量子力学中自由粒子的概念、叠加原理的意义、采用厄米算符的主要原因、“光子干涉”问题、全同性原理和对称化公设等几个问题。
First the Dirac equation of free particle is solved under static condition.
先求解静止条件下自由粒子的狄拉克方程 ,然后采用态空间变换 ,得到了沿任意方向自旋和运动的自由粒子的平面波解 ,提供了求解自由粒子狄拉克方程的一种简便方法 。
unbound particle
无束缚粒子，自由粒子
Dirce Equation in Curved Space-Time;
弯曲时空中自由粒子的Drice方程
Specific Heat of an Ideal Free-Particle Model in Three Dimensions with Intermediate Statistics at Low Temperature;
服从中间统计法的三维理想自由粒子模型的低温比热
All these prevent the electrons and holes from continuing their steady motion as quasi-free particles, and introduce scattering.
所有这些影响都会妨碍电子和空穴去继续它们作为准自由粒子的稳定运动，而引起散射。
in the body free radicals are high-energy particles that ricochet wildly and damage cells.
体内的自由基是高能量的粒子。
Preparation of Polymer Nanoparticles by Homogeneous Solution Atom Transfer Radical Polymerization
原子转移自由基溶液聚合制备聚合物纳米粒子
In a three-body decay, the emerging particles have more freedom.
在三体衰变中，出现的产物粒子有较大的自由度。
Inverse Kinematics Analysis of Multi-DOFs Serial Manipulators Based on PSO
多自由度机器人逆运动粒子群优化求解方法
Preparation of Well-defined PMMA/SiO_2 Composite Particles Through Atom Transfer Radical Polymerization;
通过原子转移自由基聚合方法制备结构可控的PMMA/SiO_2复合粒子
A gas completely fills its container. The particles are free to move about. They collide with the walls and with other particles.
气体会将容器完全填充满，粒子可自由移动。它们同其他粒子以及容器壁碰撞。
Consequently, the collision of a quark in one particle with a quark in another resembles a collision of two free quarks.
因此，一个粒子中的一个夸克与另一个粒子中的一个夸克碰撞。 类似于两个自由夸克的碰撞。
If it had, the quark (夸克) might now be simply particle U, and instead of "flavors" it would have "degrees of freedom".
如果加以推广，夸克粒子现在只不过是U粒子，不对它进行“包装”而是让它具有“自由度”。
The coupling admixes the particle and collective degrees of freedom in such a manner as to partially transfer the one-particle transition strength onto the collective modes.
耦合使粒子和集体自由度按这样的方式混合，即使单粒子跃迁强度部分地转变到集体模式中。
a sudden disturbance of the earth's magnetic field; caused by emission of particles from the sun.
电磁场的突然干扰；由来自太阳粒子的发射引起的。
A Particle Swarm Optimization (PSO) Algorithm for Minimizing Interlaminar Normal Stresses at the Free-edge of Composite laminates
基于粒子群算法和ANSYS的层合板自由边界处层间正应力的优化研究
sons of liberty [ freedom ]
自由之子, 拥护自由的人
The nucleus of an atom consists of neutrons, protons and other particles.
原子核由中子、质子和其他粒子构成。
automatic gamma counter
自动伽玛（γ）粒子计数管