Equilibrium Mechanism Analysis on the Physical Processes of IAP3.0

Based on the detection of the dynamic and thermodynamic functions of the physical processes in IAP3.0, the equilibrium mechanisms of the temperature, moisture and wind axe analyzed. The negative feedback between the longwave radiation and temperature is verified. The cooling regulation of net radiation on temperature is mostly balanced by the heating of precipitation; the leading actions on temperature of other processes such as vertical diffusion, shallow cumulus convection and friction are merely available for lower air. The moisture consumption of precipitation is compensated on the whole by the provision of shallow cumulus convection, which sustains the moisture conservation to a high degree. The wind field is directly regulated by the momentum redistribution of cumulus, the dry adiabatic convection and vertical diffusion. Yet, the prominent influences of these processes are generally confined to the lower level. The east wind at low latitudes and the west wind at high latitudes are both weakened by the regulations and furthermore, by virtue of the transportation of mean meridional circulation, such a variation exactly maintains the angular momentum conservation.

Theoretical Research on the Multi-channel Reaction Mechanism of CHF Radical with HNCO by Density Functional Theory

The reaction mechanism of CHF radical with HNCO was investigated by the B3LYP method of density functional theory （DFT）, while the geometries and harmonic vibration frequencies of reactants, intermediates, transition states and products were calculated at the B3LYP/6-311＋＋G＊＊ level. In the temperature range of 100-2600 K, the statistical thermody- namics and Eyring transition state theory with Winger correction were used to study the thermodynamic and kinetic characters of the channel with low energy barrier. In addition, the analysis on the combining interaction between CHF radical and HNCO was performed by atom-in-molecules theory （AIM） and natural bond orbitals （NBO） analysis. The calculation results indicated that the reaction of CHF radical with HNCO had ten channels, and the channel of NH direct extraction （CHF ＋ HNCO→IM6→TS7→IM7→CHFNH ＋ CO） in singlet state was the main channel with low potential energy and high equilibrium constant and reaction rate constant. CHFNH and CO were the main products.

Accelerating the solving of mechanical equilibrium caused by lattice misfit through deep learning method

Precipitation is a common phenomenon that occurs during heat treatments.There is internal stress around the precipitate owing to the lattice misfit between the precipitate and matrix.This internal stress has a significant influence not only on the precipitation kinetics but also on the material properties.The misfit stress can be obtained by numerically solving the mechanical equilibrium equations.However,this process is complex and time-consuming.We developed a new approach based on deep learning to accelerate the solution process.The training data were first generated by a phase-field model coupled with elastic mechanical equilibrium equations,which were solved using the finite difference method.The obtained precipitate morphologies and corresponding stress distributions were input data for training the physics-informed(PI)UNet model.The well-trained PI-UNet model can then be applied to predicting stress distributions with the precipitate morphology as the input.Prediction accuracy and efficiency are discussed in this study.The results showed that the PI-UNet model was an appropriate approach for quickly predicting the misfit stress between the precipitate and matrix.

Surface and transport properties of Cu-Sn-Ti liquid alloys

The lack of experimental data and / or limited experimental information concerning both surface and transport properties of liquid alloys often require the prediction of these quantities. An attempt has been made to link the thermophysical properties of a ternary Cu-Sn-Ti system and its binary Cu-Sn, Cu-Ti and SnoTi subsystems with the bulk through the study of the concentration dependence of various thermodynamic, structural, surface and dynamic properties in the frame of the statistical mechanical theory in conjunction with the quasi-lattice theory （QLT）. This formalism provides valuable qualitative insight into mixing processes that occur in molten alloys.

Convective Instability and Appearance of Structured Flows for Diffusion in Multicomponent Gas Mixtures

The main objective of this article is to investigate the behavior of gaseous systems with two and more independent gradients or thermodynamic forces exhibiting complicated behavior,when the convective flows occur.The existence of structural formations in these systems is shown by the schlieren method and the fast-response transducers.The linear analysis of stability can explain reasons of the appearance of convective instability in multicomponent gas mixtures.

A New Critical Value Concerning the Genealogy of Long Period Families at L_4 in the Restricted Three-body Problem

We found another critical mass ratio value -↑μ between μ4 and μ5 concerning the genealogy of the long period family around the equilateral equilibrium point L4 in the restricted three-body problem. This value has not been pointed out before. We used numerical computations to show how the long period family evolves around this critical value. The case is similar to that of the critical values between μ2 and μ4, with slight difference in evolution details.

An Improved Incentive Ratio of the Resource Sharing on Cycles

Consider a resource sharing system in peer-to-peer(P2P)networks where peers act as both suppliers and customers of resources.Each participant obtains the utility by exchanging its resources with its neighbors according to the preset rules.A series of recent work considered a market equilibrium mechanism and studied the robustness of such a protocol against the Sybil attack strategy,which is a kind of grave threat in P2P system.The concept of incentive ratio is applied to measure how much a participant could gain from the Sybil attack by splitting its identity and reconstructing its communication connections with others.Although Chen et al.(Incentive ratios of a proportional sharing mechanism in resource sharing.In:23rd Annual International Computing and Combinatorics Conference,2017)proved the incentive ratio on cycle networks is bounded by 2 and 4,an open problem is left that is how to narrow the gap furthermore.In this paper,we improve the upper bound of incentive ratio on cycle networks to 3.This improvement comes from a better understanding of the market equilibrium mechanism and a novel analysis technique for the improvement in utility.

Mn Diffusion at Early Stage of Intercritical Annealing of 5Mn Steel

Mn distribution and austenite morphology at the early stage of intercritical annealing of 5Mn steel were investigated. It was experimentally demonstrated that a newly formed 20 nm-thick austenite was formed without the partitioning of Mn. The elemental analysis confirmed that the growth of austenite should be controlled by the diffusion of C prior to the diffusion of Mn at a low heating rate. The austenite growth started under negligible-partitioning local equilibrium mode and then switched to partitioning local equilibrium mode. Mn segregation at the γ/α interface suggested that the collector plate mechanism was the essential way of Mn partitioning at the early stage of austenite growth.