Based on the increasing pressure on the water environment, this study aims to clarify the overall status of wastewater discharge in China, including the spatio-temporal distribution characteristics of wastewater discharge and its driving factors, so as to provide reference for developing "emission reduction" strategies in China and discuss regional sustainable development and resources environm...

BACKGROUND Optimizing hospital operations is a critical issue facing healthcare systems. Reducing unnecessary variation in patient flow is likely to improve efficiency and optimize capacity for hospital inpatients. The objective of this study was to determine whether changing admissions, from a "bolus" system to a "drip" system, would result in a smoothed daily discharge rate, and reduce the le...

Prediction of highly non linear behavior of suspended sediment flow in rivers has prime importance in the field of water resources engineering. In this study the predictive performance of two Artificial Neural Networks (ANNs) namely, the Radial Basis Function (RBF) Network and the Multi Layer Feed Forward (MLFF) Network have been compared. Time series data of daily suspended sediment discharge ...

Prediction of highly non-linear behaviour of suspended sediment flow in rivers is of prime importance in environmental studies and watershed management. In this study, the predictive performance of artificial neural network (ANN) integrated with genetic algorithm (GA) was assessed. GA was used to optimize the parameters and architecture of the ANN. Five simulation scenarios (S1–S5) were develop...

For an inverter-driven compressor, the discharge temperature increased with a rise of frequency. Therefore, it is necessary to control the discharge temperature at high frequencies in order to obtain system reliability and efficiency. This paper describes the effects of an injection system on the perfonnance of an inverter-driven scroll compressor. As results of the present work, the refrigeran...

The rate of increase in industrialization and daily human activities has resulted in a tremendous increase in the amounts of waste and wastewater containing organic and inorganic pollutants discharged to the environment. Coagulation-flocculation technology has been widely employed in water/wastewater treatment as a convenient and reliable technique for removing colloids, particles, and cell deb...

the hydrograph at watershed outlet can be expressed as hydrological response of watershed to geomorphological behavior. in present study with the aid of the gis and the concept of instantaneous unit hydrograph, the watershed response was simulated. in present physical method, the iuh is derived from three parameters of time of concentration, storage coefficient and time-area curve of the basin....

Computer simulation of the thermodynamic cycle of the cylinder process of compressors providef' valuable information for compressor engineers. For example, the valve losses and the gas pulsation losses can be estimated from the simulation results. In general, the results of the computer simulation suggest that increasing the discharge port area always reduces the related valve loss and thus hel...

For successful commercial adaptation of the l-EDM (micro electro-discharge machining) process, there is a need to increase the process efficiency by understanding the process mechanism. This paper presents a model of the plasma discharge phase of a single discharge l-EDM event in deionized water. The plasma discharge is modeled using global model approach in which the plasma is assumed to be sp...

Losses in energy storage systems (ESSs) are considered operational costs and it is critical to improve efficiency in order to expand their use. We proposed a method of improving efficiency through the operation algorithm of an ESS, consisting of multiple energy storage units (ESUs). Since the ESS used for frequency adjustment maintains a fast response characteristics, we have created a lookup t...