Quantum-Mechanical Brayton Engine for the Nonrelativistic Particle Trapped in a Symmetric Potential Box

A theoretical quantum Brayton engine research has been carried out using a potential box system to increase its thermal efficiency. The method applied in this research is a classical thermodynamics system model in the form of a piston tube containing a monatomic ideal gas analogous to a quantum model in the form of a potential box containing one particle. The efficiency formulation of the quantum Brayton engine obtained from this study is following the classical version. However, the efficiency value obtained on a quantum Brayton engine is higher when compared to its classic. It happens because the value of the Laplace constant owned by the Brayton quantum version is 3, while the classic version is 5/3.

Social Evolution and Health of Man

A problem, that is while noticed by neither science nor public, stands before humanity. This problem carries the name «Biological degradation of type of Homo Sapiens». She is characterized by the decline of viability of population, epidemic chronic uninfectious of diseases, by the speed-up rate of aging of and other In basis of this phenomenon is a decline of stability of the thermodynamics system - organism of man. The ways of decision of problem are offered.

Perfect Fluid Dark Matter Influence on Thermodynamics and Phase Transition for a Reissner-Nordstrom-Anti-de Sitter Black Hole

Based on Reissner-Nordstrom-anti-de Sitter(RN-AdS) black hole surrounded by perfect fluid dark matter, we study the thermodynamics and phase transition by extending the phase space defined by the charge square Q2 and the conjugate quantity ψ, where ψ is a function of horizon radius. The first law of thermodynamics and the equation of state are derived in the form Q2=Q2(T,ψ). By investigating the critical behaviour of perfect fluid dark matter around Reissner-Nordstrom-anti-de Sitter black hole, we find that these thermodynamics system are similar to Van der Waals system and can be explained by mean field theory. We also explore the Ruppeiner thermodynamic geometry feature and their connection with microscopic structure. We find that in extended phase space there are existence singularity points of Ruppeiner curvature and they could explained as phase transitions.

Research on knowledge innovation of supply chain enterprises from the perspective of the thermodynamic entropy theory

The theory of thermodynamic entropy is applied for reference to solve the basic problems of supply chain management science and knowledge innovation of supply chain enterprises. As for entropy, only thermodynamic entropy, statistical physical entropy and information entropy have been recognized, so management entropy is defined as the generalization of entropy. According to the similarity between state change of management system and that of the thermodynamics system, the revelation of the microscopic mechanism of entropy essence by statistical physical entropy, and the foundation that information entropy is regarded as the generalization of entropy by scholars, it is concluded that management entropy exists and has the same properties as thermodynamic entropy. For instance, it becomes a measure of the degree of chaos and disorder of a system and the time vector of the management system. A knowledge innovation sharing model of supply chain enterprises is constructed based on the thermodynamic entropy theory, the process of knowledge sharing in supply chain is analyzed, and the possibility of knowledge sharing among supply chain enterprises from the point of view of game theory is discussed. The principal-agent theory is used to analyze the incentive strategy to promote knowledge sharing in supply chain, and the model of knowledge sharing in supply chain is established.

The Study of Container Yard - Roadway System Harmony in the Container Port Based on Thermodynamics Entropy

Phenomena of port container yard - roadway system is similar to thermodynamics system, the paper analyzes the sameness between such two movements by means of thermodynamics, it also defines the concepts and hypothesis of container yard - roadway system simulation. The results of this article will do help to make port container yard - roadway system easily be modeled in the field of thermodynamics entropy.