In this paper, a discrete predator–prey system is proposed and analyzed. It is assumed that the prey population has a lower critical point, which is also referred to as extinction threshold. Such behavior has been reported for many flowering plants, many fishes, epidemiology, and so on. The...

In this paper, a double-acting thermoacoustic Stirling electric generator is proposed as a new device capable of converting external heat into electric power. In the system, at least three thermoacoustic Stirling heat engines and three linear alternators are used to build a multiple-cylinder...

Traveling-wave thermoacoustic heat engine is a special device capable of converting external heat to acoustic work with high reliability and high potential efficiency. By coupling with a linear alternator, it can be further developed as a new kind of electricity generator called the...

This study investigates changes in audit strategy in China following the introduction of risk-based auditing standards rather than an internal control-based audit mode. Specifically, we examine whether auditors are implementing the risk-based audit mode to evaluate corporate governance before...

Purpose – The purpose of this paper is to test the relationship between external auditor selection and charity donation, that is, whether the governance role of external audit is effective and how it plays in China's charitable market. Design/methodology/approach – Using data from 2005 to...

A vertical supply chain consisting of an original equipment manufacturer (OEM) and a downstream retailer, faces internal competition between new and remanufactured products, along with external competition from a third party remanufacturer (3PR). These competitive forces not only affect the...

This study investigates intelligent manufacturing and its effect on remanufacturing decisions of a two-echelon closed-loop supply chain. We consider that intelligent manufacturing can reduce the cost of the new product by improving production efficiency, which creates the manufacturing benefit....

Except for excessive nutrient input and climate warming, the rapidly rising SO42- concentration is considered as a crucial contributor to the eutrophication in shallow lakes, however, the driving process and mechanism are still far from clear. In this study, we constructed a series of microcosms...

A piezo-magnetic coupled energy harvester based on mouse wheel is proposed in this paper. The entire paper presents theoretical and simulation analysis. The distance between the piezoelectric cantilever beam and the rollers, and the number of magnets on the rollers are used as the study...