In this paper, we propose a delayed predator–prey model with birth pulse and impulsive harvesting in a polluted environment. Existence conditions of the predator-extinction periodic solution are derived by developing the discrete dynamical system, which is determined by the stroboscopic map....

With the widespread application of distributed generation (DG), their utilization rate is increasingly higher and higher in the power system. This paper analyzes the static and transient impact of large-scale DGs integrated with the distribution network load models on the power grid. Studies of...

An integrated, clean, facile and ecologically friendly approach of biodiesel production from Eruca Sativa Gars (ESG) vegetable oil focused on lab scaling up was reported in this study. Transesterification of ESG oil was heterogeneously catalyzed by Cs2.5H0.5PW12O40 heteropolyacid salt. The...

"Recent volatility in food prices and the growing disparity between prices at various stages of the marketing channel has generated much interest among agricultural producers, consumers, and policy makers. This study examines the effect of nonlinear threshold dynamics on asymmetric price...

This study presents an empirical method of modeling the nonnegativity of dependent variables using truncated logistic and normal disturbance distributions. The method is applied in estimating a ranch land hedonic price function. Results show that the degree of truncation is significant.

This article studies the market reaction surrounding the announcement of the convertible bonds issuance in Chinese market, and partly explains the difference of influence on underlying securities in mature market such as the US market and emerging market in China. Meanwhile, it reveals how...

Cellulosic ethanol made from cellulosic biomass is an alternative to petroleum-based transportation fuel. The cost-effectiveness of cellulosic ethanol manufacturing has been hindered by several technical barriers. One such barrier is that low density of biomass causes high costs of biomass...

Along with the rapid economic development of China, carbon dioxide (CO<InlineEquation ID="IEq1"> <EquationSource Format="TEX">$$_{2}$$</EquationSource> <EquationSource Format="MATHML"> <math xmlns:xlink="http://www.w3.org/1999/xlink"> <msub> <mrow/> <mn>2</mn> </msub> </math> </EquationSource> </InlineEquation>) emissions will inevitable rise in the future. This will happen even though the Chinese government has made a series of attempts to constrain the CO<InlineEquation ID="IEq2"> <EquationSource Format="TEX">$$_{2}$$</EquationSource> <EquationSource Format="MATHML"> <math xmlns:xlink="http://www.w3.org/1999/xlink"> <msub> <mrow/> <mn>2</mn> </msub> </math> </EquationSource> </InlineEquation>-emissions, and is committed to reduce...</equationsource></equationsource></inlineequation></equationsource></equationsource></inlineequation>

Ammonia–water mixtures have been used as working fluids in absorption–refrigeration cycles for several decades. Their use as multi-component working fluids for power cycles has been investigated recently. The thermodynamic properties required are known or may be calculated at elevated...

A combined thermal power and cooling cycle is proposed. The proposed cycle combines a Rankine cycle and an absorption refrigeration cycle. It can provide power output as well as refrigeration with power generation as a primary goal. The new cycle uses very high concentration ammonia vapor in the...