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This work presents a dynamic model of the Stirling engine with a rhombic working mechanism which was combined with the thermodynamic model taking into consideration isothermal heat exchange in the compression and expansion spaces. On the basis of the conducted thermodynamic analysis for the working space in the Stirling engine and for the physical model of the rhombic drive system, a simulation model...
In this study, we present a novel analytical approach for robustness on Erdos-Renyi (ER) networks by introducing statistical physics method. We establish an exact mapping relation between ER networks and Ising model. Based on the mapping relation, we obtain the partition function of the ER networks and use it to determine the size of the giant component and the value of the critical edge present probability...
With reference to the disproportionation of trichlorosilane to silane, a three-stage consecutive reversible reaction with a rather unfavorable reaction kinetics, in-depth comparison in steady-state performance is performed between the column with a single reactive section and those with multiple reactive sections, adopting the equal number of trays and the equal amount of catalyst. The reactive distillation...
This work presents the ideal adiabatic model of the Stirling engine which was combined with the dynamic model of the piston-crankshaft system with three degrees of freedom. On the basis of the conducted thermodynamic analysis for the working space in the Stirling engine, and on the basis of the physical model of the working mechanism (constructed with the assumption of the static mass reduction),...
Our analytically based technique for coarse-graining (CG) polymer simulations dramatically improves spatial and temporal scaling while preserving thermodynamic quantities and bulk properties. The purpose of CG codes is to run more efficient molecular dynamics simulations, yet the research field generally lacks thorough analysis of how such codes scale with respect to full-atom representations. This...
Our analytically based technique for coarse-graining (CG) polymer simulations dramatically improves spatial and temporal scaling while preserving thermodynamic quantities and bulk properties. The purpose of CG codes is to run more efficient molecular dynamics simulations, yet the research field generally lacks thorough analysis of how such codes scale with respect to full-atom representations. This...
We investigate the femtosecond dynamics of the spaser emission by combining ab-initio simulations and thermodynamic analysis. Interestingly, the emission is characterized by rotational evolution, opening to the generation of unidirectional emission from perfectly spherical nanoparticles.
Energy consumption has taken more and more attention in process industries to enhance their competitiveness in the world. An effective analysis method will be very helpful to provide the direction of energy saving for a plant. Exergy analysis method was introduced into energy intensity¨Cproduct ratio analysis model (e-p analysis model), and exergy intensity-energy intensity-product ratio analysis...
Traditional dynamic reliability analyzing methods which are evolved from those methods used in discrete system, are short in dealing with continuous variable and process variable. Using dynamic reliability analyzing methods, this paper proposes a system hybrid dynamic model in which discrete events are included in the continuous system model. Simulation results show that this method can detailed depict...
This paper expounds the importance of saving energy of ironmaking system in iron &steel industry, as well as the meaning of exergy analysis. Black box models of exergy analysis are established for pelletizing, sintering, coking and blast furnace process in ironmaking system, and the exergy efficiency and exergy loss are calculated. It reveals the exergy loss types and quantity as well as the effect...
For the hybrid system exists manufacturing / rework / remanufacturing at the same time, the paper studies the effects of reverse logistics due to quality defects and product recycling on batch strategy of the hybrid systems. The traditional manufacture's batch model was established considering the impact of rework and remanufacturing. On this basis, the impact of the disorder costs on the model was...
In the Life-Cycle of construction project, there had been lots of participant organization join in project for construction and quit project organization system when the job was done, so there must been project organization variation. It is difficult to find a single standard to estimate different kinds of organization operation of construction engineering project due to particularity and variation...
The compression process of LNG accounts for a large part of the total energy which the huge LNG liquefaction ship consumes, and the account is increasing constantly, with the continuous development and application of natural gas. In order to improve energy efficiency, the exergy analysis is done to the refrigeration cycle which the LNG ship adopts. A conclusion is drawn after the exergy analysis to...
The aim of this research is to develop a fundamental thermo-inspired framework for modeling and analysis of network information flows. This framework is partially motivated by the treatment of energy flows in thermodynamic systems and Eulerian modeling of continuum network information flows as well as non-local biological aggregations. Capturing intrinsic energy or information flows inside these network...
With the acceleration of China's urbanization, living environment has become a major consideration of residents. Natural ventilation, as an important component of living environment, has therefore received more and more attention in the designing and building of residence. The paper introduces CFD technique to simulate flow field, and employs SIMPLE algorithm and QUICK difference scheme to conduct...
The universal black box analysis model of oil depot equipment and grey box analysis model of total system are set up by applying three-box model theory of thermodynamics. On the basis of energy consumption analysis models and energy balance equations, the relevant energy consumption criteria are put forward. In accordance with production parameters of a certain oil depot in Daqing Oilfield, the evaluation...
Based on granularity distribution of soil having fractal character, the fractal dimension of soil is studied by theory analysis and calculation. The structure character of soil is quantized by using fractal dimension, which build up a foundation for neural network considering soil structure in the process of prediction of frost heave. Topology structure of BP neural network is built, and L-M arithmetic...
In order to achieve the sustainable development in multi-span plastic covered greenhouse with high production efficiency, it was this research that established the mathematical model of the environment for cucumber production in coupling with the biological model of it, by making use of the knowledge of heat transfer, thermodynamics and the principle of energy balance as the research platform. The...
Deformation resistance of X80 pipeline steel was researched by experiment with the Gleeble-3500. Establishing the model of dislocation density of X80 pipeline steel through the corresponding relationship between dislocation density and deformation resistance, then combining with the thermodynamic model of X80 pipeline steel which is based on the KRC thermodynamics model in order to analysis the effect...
To solve problems of low efficiency, long period and not handling coupling in solid rocket motor traditional design, multidisciplinary design optimization method of solid rocket motor was specified through comparison of typical MDO method and multi-objective collaborative optimization model of solid rocket motor MDO was constructed. Aiming at computation difficulties of CO, paper put forward some...
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