scholarly journals Evolutionary Dynamics of Interfirm Cooperative System for Radical Innovation from Knowledge Collaboration Perspective

Complexity ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-21
Author(s):  
Jinsheng Li ◽  
Yi Shi ◽  
Lu Xu
Keyword(s):  
Evolutionary Dynamics ◽  
Simulation Analysis ◽  
Radical Innovation ◽  
Rent Seeking ◽  
Potential Difference ◽  
Innovative Performance ◽  
The Core ◽  
Knowledge Collaboration ◽  
Interfirm Cooperation ◽  
Cooperation System

Interfirm cooperation can be seen as a significant and effective way for exploring radical innovation. In this article, a framework of interfirm cooperation, with a core manufacture and upstream counterparties in industry, and its evolving mechanism in the reverse-chain radical innovation are established from the perspective of the fundamental role played by knowledge collaboration. Then, an evolution model of interfirm cooperation is constructed on the theory of vibration mechanics, and its evolutionary dynamics is explored through numerical and simulation analysis mainly on the key factors of knowledge potential difference and knowledge rent-seeking behaviour within the firms. The findings show that, if there is no knowledge-based rent-seeking behaviour from the upstream firms, the probable innovative performance from the interfirm cooperation should vary for the knowledge potential difference between the cooperative firms, but can come to a certain equilibrium state. Meanwhile, if the knowledge rent-seeking behaviour does exist, knowledge potential difference would lead the innovative performance evolving ultimately in divergence. What’s more, the negative effect caused by the rent-seeking behaviour could be alleviated or weakened to some extent by the excitation mechanisms presented by the core firms in the cooperation system. Therefore, the drawn conclusions should be useful for the core manufactures’ implementing various strategies to maintain or enhance the cooperation for radical innovation in industry.

scholarly journals Tripartite Evolutionary Game and Simulation Analysis of Coal Mining Safe Production Supervision under the Chinese Central Government’s Reward and Punishment Mechanism

2021 ◽  
Vol 2021 ◽  
pp. 1-17
Author(s):  
Kui Zhou ◽  
Qi Wang ◽  
Junnan Tang
Keyword(s):  
Coal Mining ◽  
Local Governments ◽  
Central Government ◽  
Simulation Analysis ◽  
Evolutionary Game ◽  
Rent Seeking ◽  
Economic Incentives ◽  
Safe Production ◽  
Punishment Mechanism ◽  
Reward And Punishment

In recent years, although coal mine accidents in China have decreased, they still occur frequently. Most previous studies on the evolutionary game of safety mining are limited to a focus on system dynamics and two-party game problems and lack a spatial graphic analysis of strategy evolution. The parameters adopted are too few, and the influencing factors considered are too simple. The purpose of the paper is to introduce more parameters to study which will have an important impact on the strategy choices of participants and the evolution path of the strategy over time. We construct a tripartite evolutionary game model of coal mining enterprises, local governments, and central governments. As our method, a payment matrix of participants and replicated dynamic equations is established, and we also implement parameter simulation in MATLAB. In summary, we found that the reward and punishment mechanism plays an important role in safe coal mining. Specifically, (1) intensifying rewards and penalties for coal mining enterprises and local governments will help encourage coal mining enterprises to implement safe production measures and local governments to implement central government safety supervision policies. However, increased rewards will reduce central government’s willingness to adopt incentive strategies. (2) The central government’s reward for coal mining enterprises’ safe production must be greater than the increased cost of safe production to encourage enterprises to implement such production. Economic incentives for local governments must be greater than the benefits of rent-seeking; only then will local governments choose to strictly implement supervision policies. (3) Increasing sales revenue and rent-seeking costs of coal mining enterprises can also encourage them to implement safe production. Therefore, a well-designed reward and punishment mechanism will change the behaviour of coal enterprises and improve the probability of safe production. The research presented in this paper further works on improving safe coal mining production and designing reasonable reward and punishment mechanisms.

The H∞ Robust Control of Global Supply Chain System Based on Demand and Time Uncertainty

2013 ◽  
Vol 442 ◽  
pp. 623-627
Author(s):  
Qi Zhang ◽  
Yi Hong Ru
Keyword(s):  
Supply Chain ◽  
Robust Control ◽  
Simulation Analysis ◽  
Uncertain System ◽  
Global Supply Chain ◽  
Supply Chain System ◽  
Chain System ◽  
Long Run ◽  
Set Up ◽  
Cooperation System

The H robust control problem of linear uncertain system is studied in this article. With international business has expanded largely in all areas of the world, some problems have also appeared in the global supply chain system. The causes of these problems are mostly from the demand and time uncertainties, so we set up a dynamic cooperation system model to reflect these uncertainties. In a further way, we propose the H robust control strategy and LMI algorithm to reduce the uncertainty influences. And using of SIMILINK tool to make simulation analysis of the system is shown at the end of this paper. Through the setback control of inventory state to restrain the disturbance of uncertain factors, we can achieve an ideal state of global supply chain system in the long run.

Design and Analysis of Hydraulic System of Balancing Device on Top Drive

2013 ◽  
Vol 401-403 ◽  
pp. 469-474
Author(s):  
Hong Wei Wang ◽  
Qing Yan Wang ◽  
Ping Yu ◽  
Chun Peng Zhang ◽  
Peng Zhang
Keyword(s):  
Hydraulic System ◽  
Normal Force ◽  
Simulation Analysis ◽  
Drill Pipe ◽  
Core Component ◽  
Threaded Joint ◽  
The Core

The balancing device is the core component of top drive. Its role is to balance the gravity of top drive to prevent damage to the threaded joint in course of making up and breaking out of threaded joint of drill pipe. At the same time it can help male thread pop up from the drill pipe box in course of breaking out of threaded joint of drill pipe. Aiming at the problems of hydraulic system of the current balancing device that thread endures big normal force in course of making up and breaking out of threaded joint of drill pipe, a new hydraulic system was designed in this paper, and the simulation was analyzed based on AMESim. Through the simulation analysis, the new hydraulic system is reasonable and the normal force that screw endures is very small, which can reduce wear significantly.

The Dynamic Construction Numerical Analysis of Large-Span Section, Long and Deep-Depth Tunnel

2012 ◽  
Vol 256-259 ◽  
pp. 1253-1257
Author(s):  
Hui Ming Bao ◽  
Xin Xiong
Keyword(s):  
Simulation Analysis ◽  
Scientific Basis ◽  
Analysis Model ◽  
Large Span ◽  
Initial Stress Field ◽  
The Core ◽  
Core Soil ◽  
Deep Depth ◽  
Simulated Analysis ◽  
Soil Excavation

Using finite element principle, the numerical simulation analysis model of the tunnels with large-span, long and deep-depth was established. The killed cells excavated in part as, while supporting part as a unit was reactivated among the simulation analysis. The changing characteristics of the initial stress field, the circular soil excavation and supporting, the core soil excavation, as well as the down step excavation and supporting was simulated analysis during dynamic construction of the tunnel. Those will be provided a scientific basis for the safe construction.

Design Investigation on Flow Diffuser With Code_Saturne: CFD Simulation Analysis

2017 ◽  
Author(s):  
Tingting Xu ◽  
Jiesheng Min ◽  
Serge Bellet ◽  
Richard Howard ◽  
Dominique Alvarez ◽  
...  
Keyword(s):  
Flow Rate ◽  
Cfd Simulation ◽  
Simulation Analysis ◽  
Flow Distribution ◽  
Reactor Design ◽  
Fluid Distribution ◽  
Inertia Force ◽  
The Core ◽  
The Future ◽  
Pros And Cons

The flow rate distribution at the entrance of the core plays a key role for reactor design since it has important implications for the performance, and efficient safety of a nuclear reactor. When the coolant passes from the downcomer to the core, it changes direction due to the inertia force and the curvature of the bottom vessel head. The internal components inside lower plenum work to homogenize the flow distribution. Their purpose is to prevent the formation of instabilities and the creation of vortices due to the flow reversal. In the frame of EDF’s new reactor design there is a desire to identify an optimal flow diffuser. The future intention is to study five different types of flow diffuser including EPR, VVER, Konvoï, APR+ and Westinghouse to look at the pros and cons of each design. The authors underline that the geometries of each Reactor Pressure Vessel (RPV) and associated diffuser device are quite different therefore a generic form needs to be used to make an equivalent comparison. The goal of the present work is to find the optimal mesh refinement and associated numerical parameters for the simulation of the lower plenum flow. This work is a preliminary step for a future study to compare existing diffuser concepts. Thus in the future work only the section containing the flow diffuser structure will be changed. The PIRT methodology is applied to better define the physical phenomena and key parameters that will influence the flow distribution at the entrance of the core. In order to better understand the fluid distribution and the function of the diffuser component, 3D computational fluid dynamics (CFD) simulations are launched to improve our knowledge on the flow pattern inside the lower plenum. Both the geometry and mesh are generated by Salomé1. Simulations are carried out using Code_Saturne2, an EDF in-house open-source CFD code. The generic test case is a 1/5 scale EDF “BORA” 4 loop mock-up with a flow rate of 0.1 m3/s injected into each cold leg. The unsteady flow algorithm with standard k-epsilon turbulence model has been used with a full explicit meshing except for the reactor core where a porous approach is adopted. The physical time for each calculation case is 5s for a converged simulation. Mesh sensitivity tests have been carried out ranging from 8 million cells to 28 million cells. A mesh of 22 million cells is found to provide the most appropriate balance between simulation quality and feasibility. Due to the size of the simulations, high performance computers are necessary to provide timely results. The results indicate that CFD can provide extra capacity to engineers for reactor design to evaluate the pros and cons of different existing diffuser concepts.

Mechanical System Dynamics Simulation of Crank Linkage Mechanism Based on Pro/E

2011 ◽  
Vol 295-297 ◽  
pp. 2548-2551
Author(s):  
De Gong Chang ◽  
Cun Sheng Zhang
Keyword(s):  
Mechanical System ◽  
Dynamic Simulation ◽  
3D Model ◽  
Simulation Analysis ◽  
Dynamics Simulation ◽  
Analysis Method ◽  
Linkage Mechanism ◽  
The Core ◽  
Core Part ◽  
Important Significance

The simulation analysis and research on crank linkage mechanism, which is the core part of the engine, are of important significance. Based on related theory, this paper introduces a simulation analysis method for crank linkage mechanism, which is using Pro/E. First of all, the 3D model of the mechanism is build; all the components are modeled and assembled. Then dynamic simulation for the crank linkage mechanism by using PRO/Mechanism is carried on, the result of characteristics of motion, stress, etc of the mechanism are shown. A more effective method about the simulation analysis of crank linkage mechanism is introduced in this paper.

Looking after Number One? Politicians' Rewards and the Economics of Politics

1992 ◽  
Vol 40 (2) ◽  
pp. 207-226 ◽  
Author(s):  
Christopher Hood
Keyword(s):  
Rational Choice ◽  
Public Management ◽  
Choice Model ◽  
Explanatory Power ◽  
Rent Seeking ◽  
Crucial Experiment ◽  
The Core ◽  
Rational Choice Model ◽  
Using Data ◽  
The Uk

The nature and level of rewards to politicians is an important issue in public management. It receives little theoretical attention in academic political science today, although it offers the basis of a Popperian ‘crucial experiment’ for testing the explanatory claims of the rent-seeking rational choice model of politics. This paper discusses the extent to which the core rent-seeking model can explain observed patterns of political rewards. It considers the core model against two modified models (each with two variants), using data from Australia and the UK and a limited number of observations drawn from other countries. The core-rent-seeking rational choice model appears to have poor explanatory power. A familiar overdetermination problem arises in testing the explanatory claims of modified models. Some disaggregation may be needed to refine the approach.

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