High efficiency of methylene blue removal using a novel low-cost acid treated forest wastes, Cupressus semperirens cones: Experimental results and modeling

2018 ◽  
Vol 37 (4) ◽  
pp. 504-513 ◽  
Author(s):  
Meryem Bounaas ◽  
Abdallah Bouguettoucha ◽  
Derradji Chebli ◽  
Abdelbaki Reffas ◽  
Intisar Harizi ◽  
...  
Keyword(s):  
Methylene Blue ◽  
High Efficiency ◽  
Low Cost ◽  
Experimental Results ◽  
Methylene Blue Removal

scholarly journals CD Home Nanogrid: Avoiding Standby Consumption and Diminishing Ripple Amplitudes

2021 ◽  
Author(s):  
M.A. Cordova-Fajardo ◽  
E. Tututi
Keyword(s):  
High Efficiency ◽  
Low Cost ◽  
Nonlinear Behavior ◽  
Experimental Results ◽  
Basic Unit ◽  
Local Market ◽  
Nonlinear Loads ◽  
Slow Development ◽  
Ripple Amplitude ◽  
Compact Fluorescent Lamp

<div>The nanogrids are the basic unit to develop more complex and stronger distributed systems. DC nanogrids allow a better performance and higher efficiency than the AC nanogrids. The lack of DC home appliances in the local market has resulted in a slow development of DC Home Nanogrids (DCHN). The Compact Fluorescent Lamp (CFL) and LED are used in power electronics as high efficiency and low cost lightning components. However, these devices represent a source of emission of harmonics in Alternating Current (AC) and Direct Current (DC) systems, due to their nonlinear behavior. In this paper a mathematical model for the nonlinear loads and experimental results of the voltage and current ripple in a DCHN are presented. The CFL and LED lamps are used as our nonlinear loads for test the model. The model explains well the experimental results of how the ripple amplitude is reduced. We also present the effect of decreasing the ripple amplitude when it is incorporated an induction stove in standby mode to the DCHN, which also is explained by the model.</div>

scholarly journals High-Efficiency Wavelet Compressive Fusion for Improving MEMS Array Performance

Sensors ◽  
2020 ◽  
Vol 20 (6) ◽  
pp. 1662 ◽  
Author(s):  
Siyuan Liang ◽  
Weilong Zhu ◽  
Feng Zhao ◽  
Congyi Wang
Keyword(s):  
Real Time ◽  
High Efficiency ◽  
Microelectromechanical Systems ◽  
Inertial Sensor ◽  
Low Cost ◽  
Rapid Development ◽  
Experimental Results ◽  
Zero Bias ◽  
Real Time Processing ◽  
Application Range

With the rapid development of microelectromechanical systems (MEMS) technology, low-cost MEMS inertial devices have been widely used for inertial navigation. However, their application range is greatly limited in some fields with high precision requirements because of their low precision and high noise. In this paper, to improve the performance of MEMS inertial devices, we propose a highly efficient optimal estimation algorithm for MEMS arrays based on wavelet compressive fusion (WCF). First, the algorithm uses the compression property of the multiscale wavelet transform to compress the original signal, fusing the compressive data based on the support. Second, threshold processing is performed on the fused wavelet coefficients. The simulation result demonstrates that the proposed algorithm performs well on the output of the inertial sensor array. Then, a ten-gyro array system is designed for collecting practical data, and the frequency of the embedded processor in our verification environment is 800 MHz. The experimental results show that, under the normal working conditions of the MEMS array system, the 100 ms input array data require an approximately 75 ms processing delay when employing the WCF algorithm to support real-time processing. Additionally, the zero-bias instability, angle random walk, and rate slope of the gyroscope are improved by 8.0, 8.0, and 9.5 dB, respectively, as compared with the original device. The experimental results demonstrate that the WCF algorithm has outstanding real-time performance and can effectively improve the accuracy of low-cost MEMS inertial devices.

Corrigendum to " A potentially low-cost adsorbent for methylene blue removal from synthetic wastewater " published in vol. 213 (2021) 431-440 (doi:10.5004/dwt.2021.26732)

2021 ◽  
Vol 214 ◽  
pp. 454-454
Author(s):  
Hatem A. Al-Aoh ◽  
Meshari M.H. Aljohani ◽  
A.A.A. Darwish ◽  
M. Ayaz Ahmad ◽  
Suhair A. Bani-Atta ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Low Cost ◽  
Synthetic Wastewater ◽  
Methylene Blue Removal

Flocculation of Harmful Algal Blooms by Modified Fly Ash

2011 ◽  
Vol 347-353 ◽  
pp. 2090-2093
Author(s):  
Chun Guang Miao ◽  
Xiang Qin Wang ◽  
Hong Zhang
Keyword(s):  
Fly Ash ◽  
Hydrochloric Acid ◽  
Network Structure ◽  
Harmful Algal Blooms ◽  
Algal Blooms ◽  
High Efficiency ◽  
Low Cost ◽  
Experimental Results ◽  
Modified Fly Ash

The flocculants of fly ash(FA) and modified fly ash (mFA)were investigated in this study to evaluate their flocculation efficiencies in freshwater containing harmful algal blooms(HABs). The experimental results show that the efficiency of flocculation can be prominent improved by mFA.It was found that the fly ash modified by hydrochloric acid could form network structure bundle, algal cells were wrapped up through netting and bridging effect. So the method that removal of HABs with modified fly ash is low cost with high efficiency

scholarly journals CD Home Nanogrid: Avoiding Standby Consumption and Diminishing Ripple Amplitudes

2021 ◽  
Author(s):  
M.A. Cordova-Fajardo ◽  
E. Tututi
Keyword(s):  
High Efficiency ◽  
Low Cost ◽  
Nonlinear Behavior ◽  
Experimental Results ◽  
Basic Unit ◽  
Local Market ◽  
Nonlinear Loads ◽  
Slow Development ◽  
Ripple Amplitude ◽  
Compact Fluorescent Lamp

<div>The nanogrids are the basic unit to develop more complex and stronger distributed systems. DC nanogrids allow a better performance and higher efficiency than the AC nanogrids. The lack of DC home appliances in the local market has resulted in a slow development of DC Home Nanogrids (DCHN). The Compact Fluorescent Lamp (CFL) and LED are used in power electronics as high efficiency and low cost lightning components. However, these devices represent a source of emission of harmonics in Alternating Current (AC) and Direct Current (DC) systems, due to their nonlinear behavior. In this paper a mathematical model for the nonlinear loads and experimental results of the voltage and current ripple in a DCHN are presented. The CFL and LED lamps are used as our nonlinear loads for test the model. The model explains well the experimental results of how the ripple amplitude is reduced. We also present the effect of decreasing the ripple amplitude when it is incorporated an induction stove in standby mode to the DCHN, which also is explained by the model.</div>

A potentially low-cost adsorbent for Methylene Blue removal from synthetic wastewater

2021 ◽  
Vol 213 ◽  
pp. 431-440
Author(s):  
Hatem A. Al-Aoh ◽  
Meshari M.H. Aljohani ◽  
A.A.A. Darwish ◽  
M. Ayaz Ahmad ◽  
Suhair A. Bani-Atta ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Low Cost ◽  
Synthetic Wastewater ◽  
Methylene Blue Removal

Microstructure and Mechanical Properties of Fe-Containing Al-Alloys Processed by a Rheo-Diecasting Process

2006 ◽  
Vol 519-521 ◽  
pp. 1251-1256
Author(s):  
X. Fang ◽  
G. Shao ◽  
Z. Fan
Keyword(s):  
Mechanical Properties ◽  
High Efficiency ◽  
Low Cost ◽  
Al Alloys ◽  
Experimental Results ◽  
Semisolid Slurry ◽  
Al Alloy ◽  
Twin Screw ◽  
Size And Morphology ◽  
Plate Morphology

Al-Fe compounds are usually present in the as-cast microstructure of Al-alloys as large needles or plates. As such, they have a detrimental effect on the mechanical properties of Al-alloys containing Fe, either as an impurity element or as an alloying addition. However, Fe-containing Al-alloys also offer attractive physical properties, such as improved stiffness, wear resistance and thermal resistance. If the needle and plate morphology of the Al-Fe compounds can be modified to a more compact morphology, with refined particle size and uniform distribution, the mechanical properties of Al-Fe based Al-alloys can be substantially improved, and therefore, they will find wider applications in many engineering sectors. A new semisolid metal processing technology, rheodiecasting (RDC), has been developed for production of Al-alloy components with high integrity. The RDC process innovatively combines the dispersive mixing power of the twin-screw mechanism, for the creation of high quality semisolid slurry, with the high efficiency, low cost nature of the high-pressure diecasting (HPDC) process for component shaping. In this paper, we present our experimental results on the effects of intensive melt shearing on the size and morphology of Al-Fe compounds in A380 alloys, with different levels of Fe additions. The experimental results have shown that intensive melt shearing during solidification can effectively change the particle shape from the usual needles and plates, to an equiaxed morphology. Samples which have undergone with melt shearing, exhibit much improved strength and ductility compared to those with the same level of Fe addition, but without exposure to melt shearing.

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