A low head recirculating aquaculture system has been designed, constructed, and is being tested at the Vriginia Tech Aquaculture Lab. Each recirculating system contains two grow-out tanks; a filtration vessel containing a microscreen drum filter; and four rotating biological contactor (RBC) biofilters; sixteen airlift pumps (eight per tank); a regenerative blower with air lines, vacuum lines, a...

A hyperbolic paraboloidal (HP) shell with straight edge lines is generated by translating a line varying the tilt of line. On dynamic response behavior HP shells, there are few studies about steel structure differently from RC structure. In this paper, effects natural period ratios, mass ratios and input directions on vibration characteristics seismic lattice shells made clear Complete Quadrati...

Abstract This study introduces a modified artificial neural network (ANN) model based on the tree–seed algorithm (ANN-TSA) to predict freshwater yield of conventional and developed wick solar stills. The proposed method depends improving performance ANN through finding optimal weights neurons (elementary units in an ANN) using TSA. use still (DWSS) with copper basin results increasing productiv...

Abstract Acid fracturing is an effective technology for increasing oil and gas production. However, the acid will cause serious corrosion to tubing. In this paper, inhibition performance of TG202 inhibitor acidizing high temperature high-pressure wells on N80 carbon steel 13Cr martensitic stainless-steel tubing in 15% hydrochloric was studied by electrochemical noise technology. The results sho...

PM2.5 pollution and visibility impairment has attracted wild public attention in urban China during the past decade. Field observation was carried out Tianjin, China, heating (HP) non-heating periods (NHP). The IMPROVE (Interagency Monitoring of Protected Visual Environments) method localized to better understand quantitative impact composition on extinction coefficient (Bext). Bext organic mas...

In this study, the changes in microstructure of HP-Nb cast heat resistant steel after 8 years of service at high temperatures were investigated. Study of microstructure using optical microscopy (OM) and scanning electron microscopy (SEM) equipped with an energy dispersive spectrometry (EDS) showed that the microstructure of this steel in as-cast condition includes an austenitic matrix, and that...

A multi-degree of freedom mechanistic-chemometrics model for predicting the pitting damage HP-13Cr stainless steel is developed by combining mechanistic models and chemometrics method. The reconstructed considering effect single factors, such as high temperature, CO2 pressure, flow rates complex stress distribution. are combined together weight coefficients variable interaction using Finally, p...