Moving mesh finite difference solution of non-equilibrium radiation diffusion equations

A moving mesh finite difference method based on the moving mesh partial differential equation is proposed for the numerical solution of the 2T model for multi-material, non-equilibrium radiation diffusion equations. The model involves nonlinear diffusion coefficients and its solutions stay positive for all time when they are positive initially. Nonlinear diffusion and preservation of solution positivity pose challenges in the numerical solution of the model. A coefficient-freezing predictor-corrector method is used for nonlinear diffusion while a cutoff strategy with a positive threshold is used to keep the solutions positive. Furthermore, a two-level moving mesh strategy and a sparse matrix solver are used to improve the efficiency of the computation. Numerical results for a selection of examples of multi-material non-equilibrium radiation diffusion show that the method is capable of capturing the profiles and local structures of Marshak waves with adequate mesh concentration. The obtained numerical solutions are in good agreement with those in the existing literature. Comparison studies are also made between uniform and adaptive moving meshes and between one-level and two-level moving meshes.Comment: 29 page

The Formation of Wenzhou Footwear Clusters: How Were the Entry Barriers Overcome?

Wenzhou used to be one of the poorest regions in eastern China. With limited arable land, poor road access to major cities, and little support from the government, it seemed to lack all the necessary conditions for economic growth according to the standard textbook. However, over the past several decades, Wenzhou has achieved one of the fastest growing rates and owned the most dynamic private sector in China. The footwear industry in particular has grown from a negligible place to the largest market share and has formed one of the largest industry clusters in China. Therefore, the footwear industry provides us with a good example to unde rstand the driving forces behind the dramatic rural industrial growth. For this study, we undertake a survey on about 140 enterprises at different scales in Wenzhou. The survey enables us to examine how the start -up capital, credit, technology, and institutional barriers have been overcome in the formation process.International Relations/Trade,

The role of clustering in rural industrialization: A Case Study of the Footwear Industry in Wenzhou

"Wenzhou used to be one of the poorest regions in eastern China. With limited arable land, poor road access to major cities, and little support from the upper level governments, this region seemed to lack all the conditions necessary for economic growth. However, over the past several decades Wenzhou has developed the most dynamic private sector in China, and has accordingly achieved one of the fastest growth rates. In particular, the footwear industry in Wenzhou has grown from a negligible market share to the largest in China. Here, we report a survey of 140 Wenzhou-based footwear enterprises of various scales, and use this information to examine the driving forces behind the dramatic rural industrial growth seen in this region. Our results show that clustering deepens the division of labor in the production process and makes it possible for small entrepreneurial firms to enter the industry by focusing on a narrowly defined stage of production. Therefore, Wenzhou represents an example of how clustering plays a significant role in helping fledgling rural industries overcome the growth constraints of capital and technology in the incipient stage of industrialization." from Authors' AbstractCluster analysis, Industrialization, Finance, Economic development, Nonfarm economy,

Local governance and public goods provision in rural China:

In developing countries, identifying the most effective community-level governance structure is a key issue and, increasingly, empirical evaluation of the effects of democratization on the provision of local public goods is needed. Since the early 1990s, tens of thousands of villages in rural China have held local-government elections, providing a good opportunity to investigate the effect of democratization on the level of public goods provision. Using a recent village survey conducted over a significant period of time, this paper compares governance by elected officials with that of appointed cadres and finds that elected officials tend to tax constituents less and provide them with higher levels of public service. Authors' Abstract.Governance., Public institutions., Democratization Economic aspects., Rural conditions China.,

LOCAL GOVERNANCE AND PUBLIC GOODS PROVISION

Since the early nineties, tens of thousands of villages have held elections of their leaders in rural China. Using a recent village survey, this paper empirically examines the impact of election on public goods provision to the rural community. We found that elected officials tend to tax less on constituents and provide them more with public services.Public Economics,

Value effect and network effect in the process of currency substitution

This paper builds an inter-temporal model to study the value and network effects in the process of currency substitution. According to our model, we can define the inaction area and malignant area by taking real interest rate difference and network effect variable as two axes. We also find that the network effect is inconsistent, that is, in the inaction area it will stabilize the using of domestic currency and inhibit currency substitution, however, in the malignant area, it will accelerate currency substitution. This inconsistence result to a ratchet effect in the process of anti-currency substitution.currency substitution; network effects; exchange cost; ratchet effect