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Journal articles on the topic 'Multiwave compressor'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Zhang, Ping, Shou-Gou Yan, Yu-Xiang Dai, et al. "Multiwave Total Focusing Method for Full-Matrix Imaging Using Ultrasonic Phased Array." Materials Evaluation 79, no. 12 (2021): 1179–88. http://dx.doi.org/10.32548/2021.me-04222.

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The imaging range of the traditional total focusing method (TFM) is usually limited by the directivity of excitation of a single wave pattern. In this paper, a multiwave TFM technique is proposed, which uses both compression and shear vertical (SV) waves for detection and imaging simultaneously. Based on this technique, a special ultrasonic transducer for multiwave detection is designed that can balance the excitation amplitude of compression and SV waves. Multiwave TFM uses the compression and SV wave fields generated by the same excitation, and the signals reflected by the two sound fields p

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2

Hartanto, Daniel, and A. Seputra Sudianto. "Applying Multiwall Carbon Nanotube for Increasing Soil Bearing Capacity." Modern Environmental Science and Engineering 8, no. 5 (2022): 263–66. http://dx.doi.org/10.15341/mese(2333-2581)/05.08.2022/002.

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Nanotechnology is an alternative in soil improvement methods. The size of the nanoparticles is very small, ranging from 1 to 100 nm. Multiwall Nanotube is one of the nano materials in increasing the bearing capacity of the soil. According to Arabania et al. (2012), the strength of clayey sand increased by 120% by adding 3% Multiwall Carbon Nanotube. Meanwhile, according to Taha (2012), the recommended addition of Multiwall Nanotube Carbon is 0.1-0.5%. This research uses Unconfined Compression Test to determine the unconfined compressive strength (qu) and undrained shear strength (cu) of the la

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Akita, Seiji, Mitsumasa Nishio, and Yoshikazu Nakayama. "Buckling of Multiwall Carbon Nanotubes under Axial Compression." Japanese Journal of Applied Physics 45, no. 6B (2006): 5586–89. http://dx.doi.org/10.1143/jjap.45.5586.

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4

Wang, C. Y., C. Q. Ru, and A. Mioduchowski. "Axially compressed buckling of pressured multiwall carbon nanotubes." International Journal of Solids and Structures 40, no. 15 (2003): 3893–911. http://dx.doi.org/10.1016/s0020-7683(03)00213-0.

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Nishio, Mitsumasa, Seiji Akita, and Yoshikazu Nakayama. "Buckling Test under Axial Compression for Multiwall Carbon Nanotubes." Japanese Journal of Applied Physics 44, No. 34 (2005): L1097—L1099. http://dx.doi.org/10.1143/jjap.44.l1097.

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Shivamurthy, B., Krishna Murthy, and S. Anandhan. "Tribology and Mechanical Properties of Carbon Fabric/MWCNT/Epoxy Composites." Advances in Tribology 2018 (July 5, 2018): 1–10. http://dx.doi.org/10.1155/2018/1508145.

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Cryogenic treated multilayered carbon fabric/oxidized multiwall carbon nanotube/epoxy (CCF/O-MWCNT/E) composite and untreated carbon fabric/epoxy (CF/E) composite were prepared by hot compression molding technique. The density and mechanical properties such as tensile properties, flexural properties, interlaminar shear strength, and microhardness of the composites were investigated as per ASTM standards. The wear and coefficient of friction behavior were investigated using computer interfaced pin-on-disc test rig at room temperature for varied load and sliding speed. The morphology of worn sur

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Helseth, L. E. "Electrical impedance spectroscopy of multiwall carbon nanotube–PDMS composites under compression." Materials Research Express 5, no. 10 (2018): 105002. http://dx.doi.org/10.1088/2053-1591/aada3c.

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Kolmogorova, V. V., G. I. Parygin, A. Yu Osipova, and V. Yu Osipov. "Elastic properties and latitudinal zoning of the lithosphere of the Middle Ural region with increased seismicity according to multiwave deep seismic sounding data." LITHOSPHERE (Russia) 25, no. 1 (2025): 24–43. https://doi.org/10.24930/2500-302x-2025-25-1-24-43.

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Research subject. Lithosphere of the Middle Urals region with increased seismicity.Aim. Study of the elastic properties and latitudinal zoning of the earth’s crust and upper mantle in the region based on multiwave deep seismic sounding data and the comparison of the identified features of the deep structure with the location of tectonic earthquakes.Materials and Methods. The gradient velocity sections of the earth’s crust and upper mantle were constructed along the Vizhay– Nizhnyaya Tura–Orsk meridional profile and the fragments of two geotraverses: Kostomuksha–Nizhniy Tagil–Semipalatinsk (Rub

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Kilmer, Misha E., Lior Horesh, Haim Avron, and Elizabeth Newman. "Tensor-tensor algebra for optimal representation and compression of multiway data." Proceedings of the National Academy of Sciences 118, no. 28 (2021): e2015851118. http://dx.doi.org/10.1073/pnas.2015851118.

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With the advent of machine learning and its overarching pervasiveness it is imperative to devise ways to represent large datasets efficiently while distilling intrinsic features necessary for subsequent analysis. The primary workhorse used in data dimensionality reduction and feature extraction has been the matrix singular value decomposition (SVD), which presupposes that data have been arranged in matrix format. A primary goal in this study is to show that high-dimensional datasets are more compressible when treated as tensors (i.e., multiway arrays) and compressed via tensor-SVDs under the t

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Barkāne, Anda, Sergejs Gaidukovs, Jānis Kajaks, and Oskars Platnieks. "Dielectric Properties of Ethylene Vinyl Acetate Copolymer Composites Filled with Carbon Nanotubes, Graphene Nanoplatelets and Iron Oxide Nanoparticles." Key Engineering Materials 800 (April 2019): 195–99. http://dx.doi.org/10.4028/www.scientific.net/kem.800.195.

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Ethylene vinyl-acetate copolymer (EVA) composite materials containing multiwall carbon nanotubes (MWCNT), graphene (Gr) and iron (III, IV) oxide (Fe3O4) nanoparticles where processed by melt blending. Film specimens were prepared by using compression moulding method. All nanoparticles content in samples was chosen equal to 20 wt.%. The material dielectric spectroscopy was used in a range of 10-2 Hz to 107 Hz to investigate nanoparticle effect on the dielectric active (ε’) and passive components (ε’’), specific electrical conductivity (σ’) and dielectric loss (tg) for the characterization of th

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11

Orlov, Andrey Petrovich, and Boris Glebovich Repin. "Numerical Experiment on Initial Magnetic Flux Compression by a Multiwire $Z$ -Pinch." IEEE Transactions on Plasma Science 43, no. 1 (2015): 360–64. http://dx.doi.org/10.1109/tps.2014.2365617.

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12

Zhao, Jiong, Mo-Rigen He, Sheng Dai, Jia-Qi Huang, Fei Wei, and Jing Zhu. "TEM observations of buckling and fracture modes for compressed thick multiwall carbon nanotubes." Carbon 49, no. 1 (2011): 206–13. http://dx.doi.org/10.1016/j.carbon.2010.09.005.

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Stewart, P. A. E. "Neutron and Positron Techniques for Fluid Transfer System Analysis and Remote Temperature and Stress Measurement." Journal of Engineering for Gas Turbines and Power 110, no. 2 (1988): 279–88. http://dx.doi.org/10.1115/1.3240118.

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Nonintrusive radiation techniques have been routinely used, since 1970, for the determination of metal component movements and clearances within engines using high-energy x-rays. Oil system operation was first analyzed using “cold” neutrons in 1975 and, since 1980, positron-emitting isotope tomography has been developed using multiwire proportional counters to determine the X, Y, and Z coordinates of labeled oil volumes within engines. The tomographic system will allow a plane-by-plane inspection across an engine or rig to be carried out using radioisotope images overlaid by an engine general

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Fagan-Murphy, Aidan, and Bhavik Anil Patel. "Compressed multiwall carbon nanotube composite electrodes provide enhanced electroanalytical performance for determination of serotonin." Electrochimica Acta 138 (August 2014): 392–99. http://dx.doi.org/10.1016/j.electacta.2014.06.050.

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15

Bilisik, Kadir, Gulhan Erdogan, and Erdal Sapanci. "Interlaminar shear properties of nanostitched/nanoprepreg aramid/phenolic composites by short beam method." Journal of Composite Materials 53, no. 21 (2018): 2941–57. http://dx.doi.org/10.1177/0021998318811523.

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The interlaminar shear strengths of nanostitched 3D aramid/phenolic composites were studied. Stitching slightly improved the interlaminar strength of the z-stitching/nanotube composites. In addition, the stitching fiber type influenced the interlaminar strength of the z-stitching/nanotube aramid/phenolic composites. The failures of all structures in the compression and tensile sides were almost negligible. However, all structures had interlaminar shear failure where delamination in z-stitching/nanotube composites was arrested. The introduction of the stitching yarn in the baseline structure im

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Kumar, Rajesh, Manjeet Kumar, and Sandeep Kumar. "Fabrication process optimization and characterization of nHA-CNTs reinforced PEEK hybrid nanocomposite." Emerging Materials Research 12, no. 3 (2023): 1–13. http://dx.doi.org/10.1680/jemmr.22.00018.

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Compression molding is the leading fabrication process for polymer composites. The settings of process parameters highly influence the mechanical properties of composites. This manuscript optimizes the ball mixing and compression molding process parameters for the fabrication of PEEK, multiwall carbon nanotubes, and nano-hydroxyapatite-based hybrid nanocomposite by the Taguchi method. The elastic modulus examined by the nanoindentation method of static mechanical analysis was taken as the output response variable. The optimum levels of mixing time, mold temperature, mold pressure, and holding

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Pantano, A., M. C. Boyce, and D. M. Parks. "Mechanics of Axial Compression of Single and Multi-Wall Carbon Nanotubes." Journal of Engineering Materials and Technology 126, no. 3 (2004): 279–84. http://dx.doi.org/10.1115/1.1752926.

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A recently developed procedure for modeling the deformation of single and multi-wall carbon nanotubes [13,14] is applied to nanotube buckling and post-buckling under axial compression. Critical features of the model, which is grounded in elastic shell theory, include identification of (a) an appropriate elastic modulus and thickness pair matching both the wall stretching and bending resistances of the single atomic layer nanotube walls, and (b) a sufficiently stiff interwall van der Waals potential to preserve interwall spacing in locally buckled MWNTs, as is experimentally observed. The first

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18

Pitois, S., J. Fatome, and G. Millot. "Generation of a 160-GHz transform-limited pedestal-free pulse train through multiwave mixing compression of a dual-frequency beat signal." Optics Letters 27, no. 19 (2002): 1729. http://dx.doi.org/10.1364/ol.27.001729.

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19

Correia, António Alberto S., Pedro D. F. Casaleiro, Diogo T. R. Figueiredo, Marta S. M. R. Moura, and Maria Graça Rasteiro. "Key-Parameters in Chemical Stabilization of Soils with Multiwall Carbon Nanotubes." Applied Sciences 11, no. 18 (2021): 8754. http://dx.doi.org/10.3390/app11188754.

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Chemical stabilization is one of the most successful techniques that has been applied to improve the geomechanical behavior of soil. Several additives have been studied to be a sustainable alternative to traditional additives (Portland cement and lime) normally associated with high cost and carbon footprint. Nanomaterials are one of the most recent additives proposed. This work is focused on one type of nanomaterial, multiwall carbon nanotubes (MWCNTs) with unique characteristics, applied to chemical stabilization of soils and aiming to identify the key-parameters affecting the stabilization i

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20

Bizhani, Hasti, Ali Asghar Katbab, Emil Lopez-Hernandez, Jose Miguel Miranda, and Raquel Verdejo. "Highly Deformable Porous Electromagnetic Wave Absorber Based on Ethylene–Propylene–Diene Monomer/Multiwall Carbon Nanotube Nanocomposites." Polymers 12, no. 4 (2020): 858. http://dx.doi.org/10.3390/polym12040858.

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The need for electromagnetic interference (EMI) shields has risen over the years as the result of our digitally and highly connected lifestyle. This work reports on the development of one such shield based on vulcanized rubber foams. Nanocomposites of ethylene–propylene–diene monomer (EPDM) rubber and multiwall carbon nanotubes (MWCNTs) were prepared via hot compression molding using a chemical blowing agent as foaming agent. MWCNTs accelerated the cure and led to high shear-thinning behavior, indicative of the formation of a 3D interconnected physical network. Foamed nanocomposites exhibited

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21

Touri, R., F. Moztarzadeh, Z. Sadeghian, D. Bizari, M. Tahriri, and M. Mozafari. "The Use of Carbon Nanotubes to Reinforce 45S5 Bioglass-Based Scaffolds for Tissue Engineering Applications." BioMed Research International 2013 (2013): 1–8. http://dx.doi.org/10.1155/2013/465086.

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Bioglass has been used for bone-filling material in bone tissue engineering, but its lean mechanical strength limits its applications in load-bearing positions. Carbon nanotubes (CNTs), with their high aspect ratio and excellent mechanical properties, have the potential to strengthen and toughen bioactive glass material without offsetting its bioactivity. Therefore, in this research, multiwall carbon nanotube (MWCNT)/45S5 Bioglass composite scaffolds have been successfully prepared by means of freeze casting process. 45S5 Bioglass was synthesized by the sol-gel processing method. The obtained

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Le, Huy-Viet, Tae-Uk Kim, Suleman Khan, et al. "Development of Low-Cost Wireless Sensing System for Smart Ultra-High Performance Concrete." Sensors 21, no. 19 (2021): 6386. http://dx.doi.org/10.3390/s21196386.

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This study proposes the development of a wireless sensor system integrated with smart ultra-high performance concrete (UHPC) for sensing and transmitting changes in stress and damage occurrence in real-time. The smart UHPC, which has the self-sensing ability, comprises steel fibers, fine steel slag aggregates (FSSAs), and multiwall carbon nanotubes (MWCNTs) as functional fillers. The proposed wireless sensing system used a low-cost microcontroller unit (MCU) and two-probe resistance sensing circuit to capture change in electrical resistance of self-sensing UHPC due to external stress. For wire

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23

Suherman, Hendra, and Irmayani. "Optimization of compression moulding parameters of multiwall carbon nanotube/synthetic graphite/epoxy nanocomposites with respect to electrical conductivity." AIMS Materials Science 6, no. 4 (2019): 621–34. http://dx.doi.org/10.3934/matersci.2019.4.621.

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24

Caiafa, Cesar F., and Andrzej Cichocki. "Computing Sparse Representations of Multidimensional Signals Using Kronecker Bases." Neural Computation 25, no. 1 (2013): 186–220. http://dx.doi.org/10.1162/neco_a_00385.

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Recently there has been great interest in sparse representations of signals under the assumption that signals (data sets) can be well approximated by a linear combination of few elements of a known basis (dictionary). Many algorithms have been developed to find such representations for one-dimensional signals (vectors), which requires finding the sparsest solution of an underdetermined linear system of algebraic equations. In this letter, we generalize the theory of sparse representations of vectors to multiway arrays (tensors)—signals with a multidimensional structure—by using the Tucker mode

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Idarraga-Mora, Jaime A., Anthony S. Childress, Parker S. Friedel, David A. Ladner, Apparao Rao, and Scott Husson. "Role of Nanocomposite Support Stiffness on TFC Membrane Water Permeance." Membranes 8, no. 4 (2018): 111. http://dx.doi.org/10.3390/membranes8040111.

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This paper discusses the role played by the mechanical stiffness of porous nanocomposite supports on thin-film composite (TFC) membrane water permeance. Helically coiled and multiwall carbon nanotubes (CNTs) were studied as additives in the nanocomposite supports. Mechanical stiffness was evaluated using tensile tests and penetration tests. While a low loading of CNTs caused macrovoids that decreased the structural integrity, adding higher loads of CNTs compensated for this effect, and this resulted in a net increase in structural stiffness. It was found that the Young’s modulus of the nanocom

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Hammood, H. Sh, S. S. Irhayyim, A. Y. Awad, and H. A. Abdulhadi. "Influence of Multiwall Carbon Nanotube on mechanical and wear properties of Copper – Iron composite." International Journal of Automotive and Mechanical Engineering 17, no. 1 (2020): 7570–76. http://dx.doi.org/10.15282/ijame.17.1.2020.06.0561.

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Multiwall Carbon nanotubes (MWCNTs) are frequently attractive due to their novel physical and chemical characteristics, as well as their larger aspect ratio and higher conductivity. Therefore, MWCNTs can allow tremendous possibilities for the improvement of the necessarily unique composite materials system. The present work deals with the fabrication of Cu-Fe/CNTs hybrid composites manufactured by powder metallurgy techniques. Copper powder with 10 vol. % of iron powder and different volume fractions of Multi-Wall Carbon Nanotubes (MWCNTs) were mixed to get hybrid composites. The hybrid compos

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Tian, Yulun, Katherine Liu, Kyel Ok, et al. "Search and rescue under the forest canopy using multiple UAVs." International Journal of Robotics Research 39, no. 10-11 (2020): 1201–21. http://dx.doi.org/10.1177/0278364920929398.

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We present a multi-robot system for GPS-denied search and rescue under the forest canopy. Forests are particularly challenging environments for collaborative exploration and mapping, in large part due to the existence of severe perceptual aliasing which hinders reliable loop closure detection for mutual localization and map fusion. Our proposed system features unmanned aerial vehicles (UAVs) that perform onboard sensing, estimation, and planning. When communication is available, each UAV transmits compressed tree-based submaps to a central ground station for collaborative simultaneous localiza

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Elango, Natarajan, N. Srinivasa Gupta, Yu Lih Jiun, and Alireza Golshahr. "The Effect of High Loaded Multiwall Carbon Nanotubes in Natural Rubber and Their Nonlinear Material Constants." Journal of Nanomaterials 2017 (2017): 1–15. http://dx.doi.org/10.1155/2017/6193961.

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The aim of this paper is to study the high load of multiwall carbon nanotubes (MWCNTs) in natural rubber (NR) matrix. Firstly, the rubber matrix, fillers, and crosslinker are thoroughly mixed together in two-roll mill. Rheological tests are done from which scorch time, cure time, and cure index are estimated. The kneaded mixer is then compression molded, dumb bell samples as per ASTM D412 are prepared, and tensile strength, tensile modulus, elongation at break, and hardness are measured. It is noticed that NR/30% MWCNT has shown the highest tensile strength of 23.38 MPa and Shore A hardness of

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Gutierrez, Brenda Janett Alonso, Sithiprumnea Dul, Alessandro Pegoretti, Jaime Alvarez-Quintana, and Luca Fambri. "Investigation of the Effects of Multi-Wall and Single-Wall Carbon Nanotubes Concentration on the Properties of ABS Nanocomposites." C 7, no. 2 (2021): 33. http://dx.doi.org/10.3390/c7020033.

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The effects of two types of carbon nanotubes, namely multiwall (MWCNT) and single-wall (SWCNT) carbon nanotube, on the thermal and mechanical properties of acrylonitrile-butadiene-styrene (ABS) nanocomposites, have been investigated. ABS filled-CNT nanocomposites with various filler loadings of 5–10 wt% were properly produced by a solvent-free process in blend compounding at 190 °C. Compression moulded plates and extruded filaments were obtained at 190 °C and 230 °C, respectively. Melt flow index (MFI), shore hardness, Vicat temperature, differential scanning calorimeter (DSC) and thermogravim

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Mansur, H. S., M. M. Pereira, H. S. Costa, and A. A. P. Mansur. "Mechanical Behavior of Nanostructured Hybrids Based on Poly(Vinyl Alcohol)/Bioactive Glass Reinforced with Functionalized Carbon Nanotubes." Journal of Nanomaterials 2012 (2012): 1–9. http://dx.doi.org/10.1155/2012/386236.

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This study reports the synthesis and characterization of novel tridimensional porous hybrids based on PVA combined with bioactive glass and reinforced by chemically functionalized carbon nanotubes (CNT) for potential use in bone tissue engineering. The functionalization of CNT was performed by introducing carboxylic groups in multiwall nanotubes. This process aimed at enhancing the affinity of CNTs with the water-soluble PVA polymer derived by the hydrogen bonds formed among alcohol (PVA) and carboxylic groups (CNT–COOH). In the sequence, the CNT–COOH (0.25 wt%) were used as the nanostructure

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Momin, Md Abdul, Mohammad Jellur Rahman, and Tetsu Mieno. "Development of Compact Load Cell Using Multiwall Carbon Nanotube/Cotton Composites and Its Application to Human Health and Activity Monitoring." Journal of Nanomaterials 2019 (April 30, 2019): 1–15. http://dx.doi.org/10.1155/2019/7658437.

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Compact load cells have been developed using multiwall carbon nanotube/cotton (MWCNT/cotton) composites, whose performance has been optimized by varying the concentration of MWCNTs and the thickness of the composite. The sensitivity of the load cell, which is defined as the ratio of the change in the relative electric resistance to the change in applied pressure, is measured to be in the range of 180-0.20 kPa-1 for applied pressures of 8.84 Pa-884 kPa (F=1.0 mN-100 N). The load cells show a rapid response in situations with a frequently changing force, with response times τ1/2 of 4.5 and 5.0 m

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Veluri, Sivanjineyulu, Przemyslaw Sowinski, Mariia Svyntkivska, Zbigniew Bartczak, Tomasz Makowski, and Ewa Piorkowska. "Structure and Mechanical Properties of iPP-Based Nanocomposites Crystallized under High Pressure." Nanomaterials 14, no. 7 (2024): 629. http://dx.doi.org/10.3390/nano14070629.

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The unique nonparallel chain arrangement in the orthorhombic γ-form lamellae of isotactic polypropylene (iPP) results in the enhancement of the mechanical properties of γ-iPP. Our study aimed at the investigation of the mechanical properties of γ-iPP nanocomposites with 1–5 wt.% multiwall carbon nanotubes (MWCNT) and 5 wt.% organo-modified montmorillonite prepared by melt-mixing and high-pressure crystallization. Neat iPP and the nanocomposites were crystallized under high pressures of 200 MPa and 300 MPa, and for comparison under 1.4 MPa, in a custom-built high-pressure cell. The structure of

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López, Oscar, Alexa Ernce, Bing Ouyang, Ed Malkiel, Cuiling Gong, and Mike Twardowski. "Advancements in Remote Compressive Hyperspectral Imaging: Adaptive Sampling with Low-Rank Tensor Image Reconstruction." Electronics 13, no. 14 (2024): 2698. http://dx.doi.org/10.3390/electronics13142698.

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We advanced the practical development of compressive hyperspectral cameras for remote sensing scenarios with a design that simultaneously compresses and captures high-quality spectral information of a scene via configurable measurements. We built a prototype imaging system that is compatible with light-modulation devices that encode the incoming spectrum. The sensing approach enables a substantial reduction in the volume of data collected and transmitted, facilitating large-scale remote hyperspectral imaging. A main advantage of our sensing design is that it allows for adaptive sampling. When

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Arrechea, Susana, Edward M. A. Guerrero-Gutiérrez, Luis Velásquez, et al. "Effect of additions of multiwall carbon nanotubes (MWCNT, MWCNT-COOH and MWCNT-Thiazol) in mechanical compression properties of a cement-based material." Materialia 11 (June 2020): 100739. http://dx.doi.org/10.1016/j.mtla.2020.100739.

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Bizhani, Hasti, Ali Asghar Katbab, Emil Lopez-Hernandez, Jose Miguel Miranda, Miguel A. Lopez-Manchado, and Raquel Verdejo. "Preparation and Characterization of Highly Elastic Foams with Enhanced Electromagnetic Wave Absorption Based On Ethylene-Propylene-Diene-Monomer Rubber Filled with Barium Titanate/Multiwall Carbon Nanotube Hybrid." Polymers 12, no. 10 (2020): 2278. http://dx.doi.org/10.3390/polym12102278.

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Hybrid ethylene-propylene-diene-monomer (EPDM) nanocomposite foams were produced via compression molding with enhanced electromagnetic wave absorption efficiency. The hybrid filler, consisting of 20 phr ferroelectric barium titanate (BT) and various loading fractions of multi-wall carbon nanotubes (MWCNTs), synergistically increased the electromagnetic (EM) wave absorption characteristics of the EPDM foam. Accordingly, while the EPDM foam filled with 20 phr BT was transparent to the EM wave within the frequency range of 8.2–12.4 GHz (X-band), the hybrid EPDM nanocomposite foam loaded with 20 p

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Chen, Zhen, Shulong Nie, Tao Li, Tianhua Lai, Qin Huang, and Kehai Zhang. "Torsional vibration response characteristics and structural optimization of shale gas compressor shaft system." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, February 1, 2022, 095440892210769. http://dx.doi.org/10.1177/09544089221076990.

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Due to the complexity of shale gas development formations, high-speed reciprocating compressors must be able to operate in harsh pressurization conditions, such as multiwall operation conditions and changing well conditions, resulting in high shaft system impact loads and poor cooperative matching of the rotation speed, which can easily cause shaft system torsional vibration and significantly reduce the performance and operational safety of shale gas compressors. The vibration test results of the shaft system at the Weiyuan site show that there were 3rd- and 7th-order torsional vibration pheno

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Vitale, Raffaele, Azar Azizi, Mahdiyeh Ghaffari, Nematollah Omidikia, and Cyril Ruckebusch. "Three‐Way Data Reduction Based on Essential Information." Journal of Chemometrics, November 5, 2024. http://dx.doi.org/10.1002/cem.3617.

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ABSTRACTIn this article, the idea of essential information‐based compression is extended to trilinear datasets. This basically boils down to identifying and labelling the essential rows (ERs), columns (ECs) and tubes (ETs) of such three‐dimensional datasets that allow by themselves to reconstruct in a linear way the entire space of the original measurements. ERs, ECs and ETs can be determined by exploiting convex geometry computational approaches such as convex hull or convex polytope estimations and can be used to generate a reduced version of the data at hand. These compressed data and their

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Wang, Chaoming, Shuaiao Xie, Hangyu Hu, Lei Zhang, Junjie Liu, and Xiangyu Li. "Hierarchical elastic and conductive multiwall carbon nanotubes carboxymethylcellulose silica hybrid aerogel for strain sensor." Smart Materials and Structures, December 19, 2024. https://doi.org/10.1088/1361-665x/ada1b5.

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Abstract Flexible and wearable piezoelectrical pressure sensors have attracted extensive interests for the promising application potentials in human healthcare monitoring. However, it remains challengable to fabricate exceedingly elastic, conductive, and steady strain-sensitive aerogels. Herein, an elastic and conductive multiwall carbon nanotubed-doped methyltrimethoxysilane (MTMS)/carboxymethyl cellulose sodium (CMC) (CMC/MTMS/MWCNT) aerogels with interconnected porous microstructure was fabricated by a solution mixing and freeze-drying technique. Owing to covalent, ionic and hydrogen-bondin

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Jayakanth, J., K. Chennakesavulu, G. Ramanjaneya Reddy, et al. "A study on development of silicone rubber with conductive carbon, polyaniline, MWCNT composite for EMI shielding." High Performance Polymers, January 13, 2023, 095400832211510. http://dx.doi.org/10.1177/09540083221151013.

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The multiwall carbon nanotubes (MWCNTs) were grown by CVD method and using Ni impregnated zeolite as a substrate. The prepared MWCNT diameter varied from 10 to 60 nm and length in few microns. The silicone rubber (SR) was mixed well with conductive carbon, Polyaniline (PANI) and MWCNTs in two roll mill. The prepared silicone rubber materials were fabricated in the form of sheets with dimensions of 200 mm × 200 mm × 2 mm by using compression molding technique. The prepared sheets were subjected for EMI shielding efficiency measurements at low frequency (< 1.5 GHz) and high frequency range fr

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Dorofeev, Igor O., Sergey I. Moseenkov, Kirill V. Dorozhkin, Vladimir L. Kuznetsov, and Valentin I. Suslyaev. "The Influence of the Structure of Composites Based on MWCNTs and Polystyrene Matrices on their Dielectric Properties." physica status solidi (b), March 13, 2025. https://doi.org/10.1002/pssb.202400684.

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The article presents the results of searching for relationships between the distribution type and content of multiwall carbon nanotubes (MWCNTs) in a polymer matrix and the values of permittivity of a composite material. Two types of composites are considered: a) with uniform distribution of MWCNTs in the volume of a polystyrene matrix (PS) and b) with nanotubes distributed in the volume of composites in the form of 3D interconnected cells surrounding PS spheres deformed by compression. It is shown that at mass concentrations of MWCNTs up to 6% and their uniform distribution in the volume of t

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Kumar, Manjeet, Rajesh Kumar, and Sandeep Kumar. "Synergistic effect of carbon nanotubes and nano-hydroxyapatite on mechanical properties of polyetheretherketone based hybrid nanocomposites." Polymers and Polymer Composites, November 5, 2020, 096739112096950. http://dx.doi.org/10.1177/0967391120969503.

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Hybrid nanocomposites utilize the benefits of properties of different fillers to enhance its desired properties. Polyetheretherketone (PEEK) based hybrid nanocomposites have immense potential applications in aerospace, automobile, high-temperature electrical applications, and medical and health care. The present work is an attempt to improve the elastic modulus, hardness, fracture resistance, and storage modulus simultaneously by reinforcing the PEEK matrix with multiwall carbon nanotubes (MWCNTs) filler and 30 wt.% nano hydroxyapatite (nHA)-MWCNT hybrid filler. The nanocomposites having 0,1,3

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Le, Huy Viet, Van Manh Nguyen, Thi Nhan Pham, et al. "Self-sensing characteristics of smart high-performance cementitious composites containing multiwall carbon nanotubes, steel fibers, and steel slag aggregates under compression." Sensors and Actuators A: Physical, December 2023, 114920. http://dx.doi.org/10.1016/j.sna.2023.114920.

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Arrechea, Susana, Edward M. A. Guerrero-Gutiérrez, Luis Velásquez, et al. "Effect of Multiwall Carbon Nanotubes (Mwcnt, Mwcnt-Cooh and Mwcnt-Thiazol) in the Mechanical Compression Properties of a Cement-Based Material." SSRN Electronic Journal, 2020. http://dx.doi.org/10.2139/ssrn.3548834.

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Gul, Habiba, Muhammad Bilal, Tasleem Hussain, Israf Ud Din, Muhammad Mubashir, and Qazi Nasir. "Effects of Ni Loadings on the Structure and Morphology of Carbon Nanotubes Using Nickel Doped Iron Oxide Catalysts." ChemistrySelect 9, no. 38 (2024). http://dx.doi.org/10.1002/slct.202402285.

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AbstractIron oxide and their different doped iron oxide catalyst have been used for decades and are considered as efficient catalysts in several synthesis schemes including synthesis of carbon nanotubes. The iron oxide of the catalyst is abundant in nature, high catalytic activity at low over potentials, stability in basic media and low cost, making it environmentally and economically attractive. Nickel doped iron oxide catalyst have not been reported in the literature. Doping of nickel over iron oxide catalyst, different percentage 1 %, 5 %, 10 % and 20 % were done by impregnation method. The

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Jabłońska-Hood, Joanna. "Conceptual integration theory and British humour: an analysis of the sitcom Miranda." European Journal of Humour Research 7, no. 4 (2020). http://dx.doi.org/10.7592/ejhr2019.7.4.jablonska.

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Conceptual integration theory (henceforth CIT), aka conceptual blending, was devised by Fauconnier and Turner (2002) as a model for meaning construction and interpretation. It is based on the notion of a mental space, which originated in Fauconnier's early research (1998). Mental spaces are structures that constitute information pertaining to a particular concept (Fauconnier and Turner 2002: 40). Interestingly, mental spaces can be linked together and blended so as to produce a novel quality not previously present. In this manner, conceptual integration serves the purpose of a theoretical mode

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