Research on the Growth of Internet SMEs Based on Entropy Theory

With the rapid development of Internet technology, Internet companies rise rapidly in all areas of the society, and have become a major economic way and also a new economic growth point in the modern era. This heralds the coming of network economy era. It is essential for both managers and investors to evaluate the growth of a listed company. Therefore, academics in China have been giving a lot of attention on the study about the growth of thoseInternet enterprises. First, on the basis of enterprise growth theory and entropy theory, this paper is aimed at recognizing the factors influencing the development of small and medium-sized Internet enterprises by analyzing questionnaires. Then, the concept of entropy is proposed based on the entropy theory. This research provides a new method for growth analysis and also has a far-reaching significance for the development of the Internet SME

Seismicity Enhances Macrodispersion in Finite Porous and Fractured Domains: A Pore-Scale Perspective

Understanding the effects of oscillating flow field induced by seismicity on the transport process is vital for predicting the fate and transport of solute in many dynamic environments. However, there is prominent discrepancy in arguing with the response of dispersion to the oscillating flow field (i.e., the longitudinal dispersion coefficient would decrease, increase, or maintain unchanged). To unravel the underpinning physics about this controversial response, we simulated two-hundred twenty pore-scale numerical experiments for the seismicity-induced oscillating flow field and associated solute transport in the idealized finite porous (i.e., fluidic plate) and fractured (i.e., parallel plates) domains. The numerically obtained breakthrough curves were fitted to the macroscopic advection-dispersion equation to retrieve the mean velocity and apparent macrodispersion coefficient (DL). We found that DL increases to its maxima when the oscillating flow field resonates with the finite systems, that is, the period (T) of the oscillating flow field or the seismic wave approaches the pore volume (τ) of a finite domain. The resonant effects diminish and DL barely changes when T is much larger or smaller than τ. Moreover, the degree of enhancement in DL increases exponentially with the amplitude of the seismic force. Fundamental understanding of the response of macrodispersion to the oscillating flow field adds value in predicting the fate of solute in transient flow systems via the advection-dispersion equation

Contact analysis of heavy-duty apron feeder with clearance

The problem of clearance contact between the bearing plate and the supporting guide rail is studied when the heavy‐duty Apron Feeder is subjected to impact load. Based on the energy method, the impact force of the falling ore was calculated, and the nonlinear contact finite element analysis of the structure with clearance was performed using ANSYS Workbench. The results show that at the first moment of contact, the initial contact shape is an approximately linear contact, and then a deformation occurs near the contact line, which quickly evolves from a linear contact to a surface contact. The contact stress distribution is diffused outward along the initial contact boundary and gradually decreases, and the stress concentration occurs at the contact boundary. When the distance is different, the shape of the contact area is similar, but when the distance is large, the contact area is small and the stress distribution is more concentrated. The nonlinear contact calculation of the skirt feeder reveals the instantaneous contact process of the plate rail under the impact force and determines the influence of the distance size on the contact properties, which provides a theoretical basis for the selection of the distance value

The Dynamics Mechanism of Vulnerability for Resource-based Enterprise Communities in China

This paper has analyzed the dynamics mechanism of resource enterprisescommunity vulnerability, selected the key factor of resources to establisha nonlinear dynamical model. The model reveals the constrained relationship between the number of vulnerable enterprises and resource shortagerate, and the same relationship between t vulnerable enterprise numbersand the owning rate of resource market by the biggest enterprise in resource-type enterprises community of China. The results showed that, theshortage rate of resources take up more percentage than the occupancy ofresource rate of the strongest enterprises in Enterprise community whenD>q. the characteristics and patterns of the Chinese enterprise evolutionare as follows, (1) The strongest enterprises n1 will decline or transformin the enterprise community. (2) The enterprises which survived after theshortage of resources will go through three stages: ① resistance stage;② recovery stage; ③ stable stage. We believe that there are three movements that can make sure the resource-based enterprises community keepgrowing continuously in the competitive market for resources, (1) understand the enterprise resources shortage rate and the strongest enterprisesshare in resource rate in enterprise community, (2) follow the even-oddsymmetry or odd-even symmetry laws based on the familiarity of a resource economy, (3) put the enterprises in the suitable position

Effects of passive-storage conceptualization on modeling hydrological function and isotope dynamics in the flow system of a cockpit karst landscape

Funding Information: This research was supported by the National Natural Science Foundation of China (grant nos. 42030506 and 41971028). We thank Natalie Orlowski, the two reviewers (Catherine Bertrand and the anonymous reviewer) and Thom Bogaard for their constructive comments that significantly improved the manuscript. Funding Information: Acknowledgements. This research was supported by the National Natural Science Foundation of China (grant nos. 42030506 and 41971028). We thank Natalie Orlowski, the two reviewers (Catherine Bertrand and the anonymous reviewer) and Thom Bogaard for their constructive comments that significantly improved the manuscript. Financial support. This research has been supported by the National Natural Science Foundation of China (grant nos. 42030506 and 41971028). Publisher Copyright: Copyright © 2022 Guangxuan Li et al.Peer reviewedPublisher PD

Theory for Dynamic Longitudinal Dispersion in Fractures and Rivers with Poiseuille Flow

We present a theory for dynamic longitudinal dispersion coefficient (D) for transport by Poiseuille flow, the foundation for models of many natural systems, such as in fractures or rivers. Our theory describes the mixing and spreading process from molecular diffusion, through anomalous transport, and until Taylor dispersion. D is a sixth order function of fracture aperture (b) or river width (W). The time (T) and length (L) scales that separate preasymptotic and asymptotic dispersive transport behavior are T = b2/(4D m), where Dm is the molecular diffusion coefficient, and L = b4 / 48μDm ∂p / ∂x, where p is pressure and μ is viscosity. In the case of some major rivers, we found that L is ∼150W. Therefore, transport has to occur over a relatively long domain or long time for the classical advection-dispersion equation to be valid