一种基于可编程逻辑器件的液位测量装置的设计

采用CYZ302型液位式传感器和可编程逻辑器件以及数码管来设计硬件,设计了一种液位测量装置。实验分析显示,该设计可以提高测量精度。同时,该系统也可以用于除水之外其他液体的液位测量。实验结果表明,该装置可以满足一般的液位测量要求。     

弱电统一规范理论中的费曼规则

在Rξ规范条件下,导出了规范场、希格斯场、规范固定项及鬼场的拉格朗日密度,并据此给出了弱电统一规范理论中的费曼规则.     

弱电统一规范理论中的费曼规则

在R-ε规范条件下,导出了规范场、希格斯场、规范固定项及鬼场的拉格朗日密度,并据此给出了弱电统一规范理论中的费曼规则.     

基于内联网的计量器具管理系统

计量器具管理系统是一个以计量器具办证事务为中心,实现信息、管理、服务协同工作的办公管理平台。它通过规范办公流程,提高管理水平和监督力度,实现全面提升办公效率的目的。     

Quantum algorithms for quantum field theories

Quantum field theory reconciles quantum mechanics and special relativity, and plays a central role in many areas of physics. We developed a quantum algorithm to compute relativistic scattering probabilities in a massive quantum field theory with quartic self-interactions (φ(4) theory) in spacetime of four and fewer dimensions. Its run time is polynomial in the number of particles, their energy, and the desired precision, and applies at both weak and strong coupling. In the strong-coupling and high-precision regimes, our quantum algorithm achieves exponential speedup over the fastest known classical algorithm.     

Current status of theories of hearing

In summing up the current status of the hearing theories, it may be said that each of the vibration patterns of the basilar membrane postulated by the four major theories of hearing can be obtained by varying two elastic properties of the membrane-namely, the coupling between adjacent parts and the absolute value of the elasticity. If these two variables are adjusted to their numerical values in the cochlea of a living animal or a fresh preparation of the human ear, traveling waves are observed along the membrane. These traveling waves have a flat maximum that shifts its location along the membrane with a change of frequency-the place of the maximum determining the pitch. An enlarged dimensional model of the cochlea in which the nerve supply of the sensory organs on the basilar membrane was replaced by the skin of the arm indicates that the inhibitory action in the nervous system can produce quite sharp local sensations, which shift their place with changes in the frequency of the vibrations.