Bibliographies thématiques / SF-CW

Littérature scientifique sur le sujet « SF-CW »

Auteur : Grafiati
Publié le 10 mars 2023

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Articles de revues sur le sujet "SF-CW"

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Liu, Lin, et Ju Ming Yao. « Wet-Spinning of Reinforced Artificial Silk Hybrid Fibres by Cellulose Whiskers ». Advanced Materials Research 175-176 (janvier 2011) : 272–75. http://dx.doi.org/10.4028/www.scientific.net/amr.175-176.272.

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In this paper, the cellulose whisker/silk fibroin (CW/SF) aqueous solution with different composition was obtained by a dialysis against polyethylene glycol (PEG) solution at room temperature. The rheological behavior of CW/SF solution was investigated and the reinforced CW/SF hybrid fibres were prepared by a dry-wet spinning method. The results showed that the spinnability was better for the CW/SF solution according to the calculation of flowing characteristic index. The cellulose whiskers were dispersed homogeneously in the silk matrix. Moreover, it could be found that the tensile strength and Young’s modulus of the hybrid fibers were improved with the increase of cellulose whisker content, which reached the maximum when the cellulose whisker content was 5 wt%. Compared with the pure silk fiber, the tensile strength and Young’s modulus of the CW/SF hybrid fibers containing 5 wt% CWs were increased from 135.78±12.73 MPa and 5.74±0.43 GPa to 438.68±22.63 MPa and 17.36±2.04 GPa, respectively.
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Xu, Fujun, Liangang Zheng, Kun Zhang, Mohamed Amine Aouraghe, Sidra Saleemi, Yanhong Cao et Yiping Qiu. « Mechanical Properties and Failure Analysis of 3D-Woven Copper Wire/Glass Fiber Hybrid Composites ». AATCC Journal of Research 7, no 5 (1 septembre 2020) : 17–24. http://dx.doi.org/10.14504/ajr.7.5.3.

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Three-dimensional woven fabrics with excellent structural integrity are a very promising structure for multifunctional materials hybridized with various yarns. To systematically investigate mechanical properties and failure analysis of 3D-woven hybrid composites, copper wire/glass fiber composites with two hybrid structures, single-face copper wire (SF-CW) and double-face copper wire (DF-CW), were fabricated and tested. The SF-CW hybrid composites showed excellent tensile strength (1214 MPa) and bending strength (964 MP), which was greater than that of the DF-CW hybrid composites. Additionally, the compression strength and impact resistance of both composites exhibited comparable properties with traditional materials. Furthermore, all failure cross sections showed superior structural integrity and anti-delaminate properties, demonstrating that 3D-woven composites can be a good candidate platform by hybridization with various multifunctional yarns.
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Morrison, K. « Effective Bandwidth SF-CW SAR increase using frequency agility ». IEEE Aerospace and Electronic Systems Magazine 21, no 6 (juin 2006) : 28–32. http://dx.doi.org/10.1109/maes.2006.1662006.

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Billore, S. K., N. Singh, J. K. Sharma, P. Dass et R. M. Nelson. « Horizontal Subsurface Flow Gravel Bed Constructed Wetland with Phragmites Karka in Central India ». Water Science and Technology 40, no 3 (1 août 1999) : 163–71. http://dx.doi.org/10.2166/wst.1999.0158.

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Treatment performance of a field-scale horizontal subsurface (SF) constructed wetland (CW) was evaluated for removal efficiency of BOD, TSS, NH4-N, NO3-N, TKN and P from municipal wastewater emanating from a small community of residential areas in Ujjain, Central India. The SF wetland had a rectangular size and covered an effective surface area of 41.82 m2 with a water retention capacity of 18 m3. The SF medium was composed of a gravel bed supported below on a layer of puddled local clay and overlaid by a thin synthetic liner. CW was planted initially with locally grown grass, Phragmites karka. Plants placed in this rectangular design at the rate of 3 to 4 plants per m2 increased to 6157 plants within ten months producing a biomass of 121 tonnes ha−1. The influent was pretreated before entering the SF system, through two baffles; a grass covered small ditch, followed by a narrow tunnel of packed biofilmed boulders. Removal rates of TSS (48%), TKN (36%), NH4-N (22%) and NO3-N as zero percent were realised. An earthen channel provided initial pretreatment by a land treatment system. Average treatment performance after five months from this SF system recorded removal efficiencies of 78% for NH4-N, TSS; 58-65% for P, BOD and TKN. Effluent dissolved oxygen levels increased to 34% indicating existence of aerobic conditions in the rooted-gravel bed. The SF system overall results established: (a) very cost-effective treatment technology, (b) SF removal efficiency above 50% for BOD, NH4-N, TKN, and P. This SF system presents a unique design consideration compared with the land-intensive Kickuth standard system design.
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Wojciechowska, Ewa. « Removal of persistent organic pollutants from landfill leachates treated in three constructed wetland systems ». Water Science and Technology 68, no 5 (1 septembre 2013) : 1164–72. http://dx.doi.org/10.2166/wst.2013.316.

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The objective of the study was assessment of occurrence and removal of two groups of persistent organic pollutants: polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) in landfill leachate (LL) treated in three constructed wetland systems (CWs) of different construction and flow regime. Two subsurface flow systems (SSF) were analyzed: one with horizontal flow and the second one consisting of two vertical flow beds followed by a horizontal flow bed. The third CW was a surface flow (SF) system, consisting of 10 ponds connected in series. The concentrations of 12 PAHs and 7 PCBs were measured in the samples of LL after subsequent treatment stages and in the sediment samples from the SF system as well as in the substrate samples from the SSF flow systems. It was confirmed that the major mechanism of PCB and PAH removal in CW systems was adsorption to the bottom sediments (in the SF system) or substrate of the beds (in the SSF systems) as well as adsorption to suspended solids, followed by sedimentation. The compounds characterized by higher octanol/water partition coefficient were more effectively retained in the sediments. Also removal of these substances occurred in the earlier stages of treatment.
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Araya-Schmidt, Tomas, Leonore Olsen, Lasse Rindahl, Roger B. Larsen et Paul D. Winger. « Alternative bait trials in the Barents Sea snow crab fishery ». PeerJ 7 (13 mai 2019) : e6874. http://dx.doi.org/10.7717/peerj.6874.

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Commercial harvesting of snow crab (Chionoecetes opilio) in the Barents Sea started in 2012 by Norwegian fishing vessels. This new fishery has significant bait requirements, representing an emerging conservation challenge. In this study, we evaluate the performance of five alternative (natural) baits manufactured from the waste stream of existing and sustainably managed harp seal (Pagophilus groenlandicus) and minke whale (Balaenoptera acutorostrata) capture. Five different types of new bait were evaluated, including seal fat (SF), seal fat with skin (SFS), seal meat with bone (SMB), whale fat with skin (WFS), and whale meat with fat (WMF). A comparative fishing experiment was conducted onboard a commercial snow crab fishing vessel in the Barents Sea (May–June, 2016) to evaluate the performance of traditional bait (squid, Illexs spp.) and alternative baits at catching snow crabs. Performance of the different baits were compared on the basis of the number of commercial crab caught per trap haul catch per unit effort (CPUE) and carapace width (CW). Our results showed that SF and SFS performed equally well to traditional bait, with no statistical difference in CPUE (p-value = 0.325 and 0.069, respectively). All of the other experimental baits significantly decreased CPUE, when compared to squid. No significant effect of bait treatment on CW was detected and the cumulative distribution of CW was the same between control traps and each of the bait treatments. Overall the results indicated that SF and SFS represent a viable alternative to replace traditional bait, addressing a key conservation challenge in this bait intensive snow crab fishery.
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Maurice, Nicolas, Cécile Pochet, Nouceiba Adouani et Marie-Noëlle Pons. « Role of Seasons in the Fate of Dissolved Organic Carbon and Nutrients in a Large-Scale Surface Flow Constructed Wetland ». Water 14, no 9 (4 mai 2022) : 1474. http://dx.doi.org/10.3390/w14091474.

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The role of seasons in the removal of dissolved organic carbon (DOC), nutrients and in changes in the spectral properties of dissolved organic matter (DOM) in a large-scale surface flow constructed wetland (SF-CW) receiving reclaimed water and composed of three basins with different vegetation patterns was studied. Dissolved nitrogen removal efficiencies within the three basins in summer (>50%) and winter (<30%) were significantly different. SF-CW water is enriched in DOC in spring and summer with average outlet concentrations above 8 mg×L−1. UV-visible indices, such as the specific absorbance at 254 nm or the spectral slope between 275 and 295 nm, did not vary over the seasons; thus, the basins did not change DOM aromaticity and average molecular weight. Synchronous fluorescence spectra showed variations in terms of protein-like and humic-like substances, the latter being more sensitive to photodegradation. A lab-scale photodegradation experiment confirmed that radiation from the sun was responsible for this decrease, showing this process could alter the composition of DOM at full-scale. DOM variations result from a seasonal competition between release by vegetation and photodegradation. These results validate the necessity for long-term monitoring of SF-CWs, and the utility of rapid optical methods to monitor DOC.
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Yuan, S., Q. X. Xia, X. Q. Cheng et G. F. Xiao. « Simulation study on the texture evolution mechanism of magnesium alloy cylindrical parts with inner ribs during hot power spinning ». IOP Conference Series : Materials Science and Engineering 1270, no 1 (1 décembre 2022) : 012081. http://dx.doi.org/10.1088/1757-899x/1270/1/012081.

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Grasping the mechanism of texture evolution during hot power spinning of magnesium alloy cylindrical parts with inner ribs, which have the dual lightweight advantages of material and structure, can provide a theoretical basis for texture regulation in the preparation of high-performance magnesium alloys. Based on the crystal plastic finite element method, the macro-meso coupled model was constructed and the simulation study of magnesium alloy cylindrical parts with inner ribs during hot power spinning was carried out. The texture evolution mechanism at the position of cylindrical wall (CW) and inner rib (IR) was revealed by tracking the change of grain orientation and the analysis of Schmid factor (SF). The results show that the c-axis of grains of magnesium alloy extruded blank gradually deflects from parallel to tangential direction (TD) to parallel to radial direction (RD). Under the action of radial compressive stress, the formation of texture at CW is attributed to the orientation deflection of grains which have larger SF of basal slip system and locate in the region of the maximum texture strength of blank, while the origin of the texture at IR mainly comes from the orientation deflection of grains with a smaller (0.1~0.2) SF of basal slip system.
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Feng, Jiacheng, Xi Cheng, Xiao Li, Peng Wang, Weihong Hua et Kai Han. « Highly Efficient Mid-Infrared Generation from Low-Power Single-Frequency Fiber Laser Using Phase-Matched Intracavity Difference Frequency Mixing ». Applied Sciences 10, no 21 (23 octobre 2020) : 7454. http://dx.doi.org/10.3390/app10217454.

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In this paper, we demonstrated efficient mid-infrared generation using a low-power 1064 nm single-frequency (SF) fiber laser based on phase-matched intracavity difference frequency generation (DFG) in a continuous-wave (CW) periodically poled lithium niobate (PPLN)-based optical parametric oscillator (OPO). This is the first time that the frequency down conversion of a low-power SF light source has been achieved using intracavity difference frequency mixing. A high power 1018 nm fiber laser was firstly used for building the parametric oscillation and providing the high power resonant signal wave. To realize an efficient DFG process between the SF pump wave and the intracavity signal wave, the temperature of periodically poled lithium niobate (PPLN) crystal was properly adjusted to satisfy the phase-matching conditions. Finally, the low-power 1064 nm SF pump wave was successfully converted to a 3.7 μm mid-infrared wave with a conversion efficiency of 21.6%. The conversion efficiency, to the best of our knowledge, is the highest for SF lasers in DFG processes. Meanwhile, taking advantage of SF laser pumping, a narrow linewidth of 271 pm (5.9 GHz) in the mid-infrared region was achieved without adding any etalons or devices in the cavity.
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Solimene, Raffaele, Francesco Soldovieri, Andrea Baratonia et Rocco Pierri. « Experimental Validation of a Linear Inverse Scattering TWI Algorithm by a SF-CW Radar ». IEEE Antennas and Wireless Propagation Letters 9 (2010) : 506–9. http://dx.doi.org/10.1109/lawp.2010.2051012.

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Thèses sur le sujet "SF-CW"

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LIN, HAN-MING, et 林漢明. « Study of SF�� lamb dip using CW Co�疹aser ». Thesis, 1992. http://ndltd.ncl.edu.tw/handle/28617310421104017637.

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PAPI, FEDERICO. « Sviluppo di un Prototipo Radar Penetrante SF-CW ad Altissima Risoluzione ». Doctoral thesis, 2016. http://hdl.handle.net/2158/1025123.

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Actes de conférences sur le sujet "SF-CW"

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Pieraccini, Massimiliano, et Federico Papi. « Design of A CW-SF Ground Penetrating Radar ». Dans IGARSS 2016 - 2016 IEEE International Geoscience and Remote Sensing Symposium. IEEE, 2016. http://dx.doi.org/10.1109/igarss.2016.7730938.

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Pieraccini, M., F. Parrini, L. Noferini et C. Atzeni. « Masonry investigation through Very Large Bandwidth CW-SF radar ». Dans 2007 4th International Workshop on, Advanced Ground Penetrating Radar. IEEE, 2007. http://dx.doi.org/10.1109/agpr.2007.386528.

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Fratini, Matteo, Massimiliano Pieraccini, Filippo Parrini, Giulia Bernardini et Carlo Atzeni. « An Interferometric CW-SF Radar for Remote Testing and Monitoring Large Structures ». Dans 2006 European Radar Conference. IEEE, 2006. http://dx.doi.org/10.1109/eurad.2006.280292.

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