scholarly journals Fiber ball imaging

NeuroImage ◽  
2016 ◽  
Vol 124 ◽  
pp. 824-833 ◽  
Author(s):  
Jens H. Jensen ◽  
G. Russell Glenn ◽  
Joseph A. Helpern
Keyword(s):  
Fiber Ball

scholarly journals Synthesis of Polyaniline Coating on the Modified Fiber Ball and Application for Cr(VI) Removal

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Xiao Li Ma ◽  
Guang Tao Fei ◽  
Shao Hui Xu
Keyword(s):  
Waste Water ◽  
Large Scale ◽  
Ph Value ◽  
Low Cost ◽  
Strong Acid ◽  
Removal Capacity ◽  
Secondary Pollution ◽  
Potential Possibility ◽  
Fiber Ball ◽  
Maximum Removal

Abstract In this study, polyaniline (PANI) is prepared by means of chemical oxidization polymerization and directly loaded on the modified fiber ball (m-FB) to obtain macroscale polyaniline/modified fiber ball (PANI/m-FB) composite, and then its removal ability of Cr(VI) is investigated. The effects of different parameters such as contact time, pH value and initial concentration on Cr(VI) removal efficiency are discussed. The experimental results illustrate that the favorable pH value is 5.0 and the maximum removal capacity is measured to be 293.13 mg g−1. Besides, PANI/m-FB composites can be regenerated and reused after being treated with strong acid. The kinetic study indicates that the adsorption procedure is mainly controlled by chemical adsorption. More importantly, the macroscale of composites can avoid secondary pollution efficiently. Benefiting from the low cost, easy preparation in large scale, environmentally friendly, excellent recycling performance as well as high removal ability, PANI/m-FB composites exhibit a potential possibility to remove Cr(VI) from industrial waste water. Graphic Abstract The polyaniline (PANI) was coated on modified fiber ball (m-FB) to remove Cr(VI) in waste water, and this kind of PANI/m-FB composites can avoid secondary pollution efficiently due to its macrostructure. Furthermore, the removal capacity can reach to 291.13 mg/g and can be multiple reused.

All-fiber MZI sensor based on seven-core fiber and fiber ball symmetrical structure

2019 ◽  
Vol 112 ◽  
pp. 1-6 ◽  
Author(s):  
Hong Li ◽  
Huaibao Li ◽  
Fanyong Meng ◽  
Xiaoping Lou ◽  
LianQing Zhu
Keyword(s):  
Symmetrical Structure ◽  
Core Fiber ◽  
Fiber Ball

Single-tunable and dual-wavelength operation of a passive Q-switch double-Clad Er-Yb fiber laser based on the use of a titanium-oxynitride-coated fiber ball lens

2021 ◽  
Author(s):  
Ricardo-Iván Álvarez-Tamayo ◽  
Patricia Prieto-Cortés ◽  
Antonio Barcelata-Pinzón ◽  
Manuel García-Méndez ◽  
Griselda Saldaña-González
Keyword(s):  
Fiber Laser ◽  
Dual Wavelength ◽  
Coated Fiber ◽  
Fiber Ball

scholarly journals Upflow Filtration System Using Fiber-Ball Filter Media for the Treatment of Nonpoint Pollution

2021 ◽  
Vol 43 (3) ◽  
pp. 146-159
Author(s):  
Junho Lee ◽  
Daesik Song
Keyword(s):  
Particle Size ◽  
Removal Efficiency ◽  
Retention Time ◽  
Fine Particles ◽  
Head Loss ◽  
Sem Analysis ◽  
Operating Conditions ◽  
Filter Media ◽  
Filtration System ◽  
Fiber Ball

Objectives : The objective of this study is to investigate the performance of the fiber-ball media upflow filtration system for non-point pollutants treatment.Methods : The additional air backwashing nozzle were installed between upper and lower fliter media cartridge. The effect of feed SS concentration, surface overflow rate, retention time, head loss on the removal efficiency were investigated respectively. Particle size distribution, SEM, and backwashing effect were also analyzed.Results and Discussion : The operated of upflow filter mean retention time, mean head loss were 1.99 min, 7.2 cm. On condition of SOR 480 m3/m2/day, results indicate that the range of removal efficiency of turbidity and SS were 76.8 ~ 93.21% (mean 88.3%) and 85.4 ~ 97.9% (mean 92.7%), respectively. The effluent turbidity and SS were under 15 NTU, 20 mg/L, respectively.Conclusions : Since turbidity can be continuously monitored in a filtration non-point pollution treatment system, turbidity can be used as a operation factor in evaluating operating conditions. The particle size the effluent larger than the influent was due to bonding, collision and adsorption between particles in the pores of the filter media. SEM analysis showed that after backwashing, very fine particles in the filter medium were not removed but adhered to the fiber yarn and remained. The average recovery rate of fiber-ball media filtration was 88.7%, which is evaluated as excellent in backwashing.

Pretreatment Process of Heavy Oil Wastewater from Oil Field Treated by Membrane Technology

2013 ◽  
Vol 361-363 ◽  
pp. 615-618
Author(s):  
Guo Fu Sun ◽  
Jing Li Xu ◽  
Chun Hua Sui ◽  
Hong Yan Si
Keyword(s):  
Activated Carbon ◽  
Heavy Oil ◽  
Membrane Technology ◽  
Oil Field ◽  
Quality Analysis ◽  
Treated Water ◽  
Silica Removal ◽  
Fiber Ball ◽  
Oil Wastewater

Heavy oil wastewater must be pretreated if membrane technology was used to treat it. According to the quality analysis of heavy oil wastewater, the processes of silica removal by magnesia agent, filtration by fiber ball and adsorption by activated carbon were employed to treat heavy oil wastewater so that treated water could meet the demand of feed for membrane.

Self-centering of a ball lens by laser trapping: fiber-ball-fiber coupling analysis

2003 ◽  
Vol 42 (9) ◽  
pp. 1610 ◽  
Author(s):  
Robert C. Gauthier ◽  
Michael Friesen ◽  
Thomas Gerrard ◽  
Wissam Hassouneh ◽  
Piotr Koziorowski ◽  
...  
Keyword(s):  
Laser Trapping ◽  
Coupling Analysis ◽  
Fiber Coupling ◽  
Fiber Ball

A New Tool-less Layered Fracturing Technology and Its Pilot Application in Deep Thick Formations

2016 ◽  
Author(s):  
Daobing Wang ◽  
Fujian Zhou ◽  
Hongkui Ge ◽  
Xiongfei Liu ◽  
Sergio Zlotnik ◽  
...  
Keyword(s):  
Pressure Difference ◽  
Laboratory Experiments ◽  
Degradation Rate ◽  
Oil Reservoir ◽  
Great Success ◽  
Test Results ◽  
Reservoir Conditions ◽  
Net Pressure ◽  
Temperature And Pressure ◽  
Fiber Ball

ABSTRACT Multi-layer fracturing technology is challenging because of the risk of packer failure and high cost in the deep thick formation. It depends largely on the effectiveness of packer tools. However, a new degradable fiber ball could be successfully used to temporarily block the open perforations, and then the layer with higher fracturing pressure is broken down. This paper presents a new tool-less layered fracturing technique and its pilot test results with this special material. A series of laboratory experiments were conducted to evaluate the feasibility of this new technique. Degradable fiber balls were applied to perforated pipes under simulated reservoir conditions. The ball carried by the fluid first sealed the perforation holes and then increased the pressure in the pipe to simulate the resistance to pressure. In addition, the fluid was heated up to 140°C to simulate the degradation rate of fiber balls. Throughout these processes, the flow rate, temperature and pressure were continuously monitored for subsequent analysis. Experimental and application results showed that: (1) fiber balls could be thoroughly degraded at 140°C temperature after six hours; (2) at a pressure difference of 50-70MPa, its deformation rate was less than 1.5%, which indicated its higher compression capability; (3) it could effectively block the perforation holes at 90°C and a pressure difference of 20MPa; (4) The blockage of perforations by the fiber ball could significantly enlarge the net pressure in the wellbore. This technique was applied for 35 wells in a deep and thick oil reservoir, which had achieved a great success and the post-treatment oil production was enhanced by 50-60% compared with conventional stimulation techniques.

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