Low-grade waste heat source accounts for a large part of the total industrial waste heat, which cannot be efficiently recovered. The ORC (Organic Rankine Cycle) system has been proved to be a promising solution for the utilization of low-grade heat sources. It is evident that there might be...

We develop a simple scheme for the provision of public good and show that, under certain conditions, the equilibrium provision of the public good is at the efficient level. Our scheme is based on conventional games of private provision of the public good with an exogenously given cost structure...

The potential revenues of water right transactions can be substantial in theory, but the actual receipts are generally limited in practice. This difference is attributable to the presence of other factors influencing the operation of water markets. In this paper, we study the...

We have studied the statistical mechanics of money circulation in a closed economic system. An explicit statistical formulation of the circulation velocity of money is presented for the first time by introducing the concept of holding time of money. The result indicates that the velocity is...

In order to reveal the characteristics of land use change in the south loess plateau, this paper tentatively divided Loess Plateau into North and South under the support of GIS, and then introduced land use spatial temporal dynamic model, analyzed land use dynamic change in provincial scale. The...

The relationships between water yields of tributaries and coverage of different vegetation types in the corresponding sub-watersheds were investigated during the wet season in the Heishui River Valley, located in the upper portion of the Yangtze River in western China. Stable isotope analysis...

On the basis of traditional weighted network, we study a new complex network model with multi-weights, which has one or several different types of weights between any two nodes. According to the method of network split, we split the complex network with multi-weights into several different...

A three-dimensional finite element thermal model for the stackable supercapacitor is built and tested at 3 A constant current in charge–discharge process, and then we analyze the inner temperature distribution field. It can be concluded that the maximum temperature appears in core. The...

Raw biogas is a valuable renewable energy but usually requires upgrading. The mixed LED (light-emitting diode) light wavelengths achieved much better microalgae growth than that of the monochromatic. The best LED light wavelength mix ratio for both biogas upgrading and biogas slurry nutrient...