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Journal articles on the topic 'Cylindrical environment'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Zoofaghari, Mohammad, and Hamidreza Arjmandi. "Diffusive Molecular Communication in Biological Cylindrical Environment." IEEE Transactions on NanoBioscience 18, no. 1 (2019): 74–83. http://dx.doi.org/10.1109/tnb.2018.2885051.

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2

Li, Xue-Qin, Guang-Chen Bai, Lu-Kai Song, and Wei Zhang. "Nonlinear Vibration Analysis for Stiffened Cylindrical Shells Subjected to Electromagnetic Environment." Shock and Vibration 2021 (July 19, 2021): 1–26. http://dx.doi.org/10.1155/2021/9983459.

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The nonlinear vibration behaviors of stiffened cylindrical shells under electromagnetic excitations, transverse excitations, and in-plane excitations are studied for the first time in this paper. Given the first-order shear deformation theory and Hamilton principle, the nonlinear partial differential governing equations of motion are derived with considering the von Karman geometric nonlinearity. By employing the Galerkin discretization procedure, the partial differential equations are diverted to a set of coupled nonlinear ordinary differential equations of motion. Based on the case of 1 : 2

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Prokhorov, Viktor, Ivan Rozhnov, Olga Maslova, and Anna Kuklina. "3D urban transport environment." E3S Web of Conferences 389 (2023): 05030. http://dx.doi.org/10.1051/e3sconf/202338905030.

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The paper investigates issues related to the solution of problems in the development of public transport infrastructure in urban agglomerations. The opportunities of further development of the existing typical city public transport infrastructure have been studied. The conclusion about the possibility of reforming the existing typical urban public transport infrastructure is drawn. It is proposed to use the available airspace together with the ground and underground public transport as a direction for the development of urban public transport infrastructure. The formation of an urban transport

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4

Nan, Yibo, Feng Long, Feihong Yun, et al. "An Arm-Claw-Type Manipulator for Rapid Deep Water Salvage with a General Support Vessel, Part A: Prototype and Test." Journal of Marine Science and Engineering 10, no. 6 (2022): 715. http://dx.doi.org/10.3390/jmse10060715.

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This paper proposed a concept prototype of the arm-claw-type manipulator with a general purpose support vessel for the rapid salvage of deep submergence vehicles, aircraft, satellites, etc. The key functions were realized, including object clamping, claw butting and locking, position and posture adjustment, awareness, positioning, and navigation. The prototype was successfully tested in a lake environment on a hollow and cylindrical object. The arm-claw-type manipulator is suitable for the rapid salvage of cylindrical objects in an underwater environment to minimize the clamping force and poss

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Lebedev, I. F. "Study of classification processes of various bulk geomaterials in a hydrodynamic environment using laboratory models of counter-current drum separators." Journal of Physics: Conference Series 2176, no. 1 (2022): 012047. http://dx.doi.org/10.1088/1742-6596/2176/1/012047.

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Abstract The paper presents the results of studying separation processes of various mineral particles of different density in a hydrodynamic (water) environment in three laboratory models of counter-current drum separators with cylindrical, conical and multifaceted drums. Research results have shown that compared to cylindrical and conical drum separators, the multifaceted separator is most effective in separating and refining in a hydrodynamic environment. The high recovery of heavy minerals in the concentrate proves this fact.

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6

Vinay, M. S., and S. Ranganatha. "Influence of Contact Area on Tribo Response of Al 6061 in Ambient and Vacuum Environment." Journal of Physics: Conference Series 2070, no. 1 (2021): 012164. http://dx.doi.org/10.1088/1742-6596/2070/1/012164.

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Abstract Aluminium alloys are used in spacecraft and aerospace industries because of their unique properties which are lightweight and high strength. The components of aluminium alloys used in aerospace and space environment are subjected to relative motion which results in the tribo-phenomenon. The designer needs tribo response data for designing components geometrical dimensions. The literature reports inadequate tribo response data, more particularly in a vacuum environment (adverse environment). In the present investigation, experiments were conducted using Al 6061 aluminium alloy pins wit

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Zhang, Wenzheng, and Weikang Jiang. "An Improved Shock Factor to Evaluate the Shock Environment of Small-Sized Structures Subjected to Underwater Explosion." Shock and Vibration 2015 (2015): 1–11. http://dx.doi.org/10.1155/2015/451583.

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Shock factor is conventionally used to assess the effect of an underwater explosion on a target. The dimensions of some structures are much smaller than the wavelength of incident wave induced by the underwater explosion. The conventional shock factor may be excessively severe for small-sized structures because it neglects the effect of scattering; so it is necessary to study the shock factor for small objects. The coupled mode method is applied to study the scattering field surrounding the cylindrical shells. A nonlinear relation differential is derived from the impact received by the cylindr

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8

Dong, Xue Wu, Jian Hui Han, Dai Ren, Kai Mu, Zhi Min Fu, and Ya Fei Zhai. "Study on Vibratory Stress Relief of Cylindrical Welded Component with Energy-Saving and Environment." Applied Mechanics and Materials 174-177 (May 2012): 1168–72. http://dx.doi.org/10.4028/www.scientific.net/amm.174-177.1168.

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Cylindrical welded component is one of the typical components. It is necessary to do aging treatment for keeping stable dimension. Vibratory stress relief (VSR) is a new kind of technology which may eliminate the residual stress in metal component with high efficiency, energy-saving, environment protection and low cost compared with thermal stress relief (TSR). And the effect is greatly impacted by vibration parameter. Vibration modes are tested by modal analysis. Excitation frequency and point, support point and other parameter are determined by stress distribution and the fourth vibration mo

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9

Zhao, Xin, Bo Zhang, and Yueming Li. "Vibration and acoustic radiation of an orthotropic composite cylindrical shell in a hygroscopic environment." Journal of Vibration and Control 23, no. 4 (2016): 673–92. http://dx.doi.org/10.1177/1077546315581943.

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An analytical study is presented for vibration and acoustic radiation of a finite thin orthotropic composite cylindrical shell excited by a harmonic concentrated force in a hygroscopic environment. The modal analysis method is used to solve the governing equations. Theoretical results are presented in natural vibration, radial quadratic velocity, sound power and radiation efficiency, with uniform incremental moisture content. Furthermore, different stiffness, length and thickness are set respectively to research the effects of the material and structure parameters variation of the orthotropic

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10

Musii, Roman, Myroslava Klapchuk, Oleksandr Nazaruk, Inha Svidrak, and Valentyn Shynder. "Analysis of Temperature Distribution in a Two-Layer Composite Cylindrical Shell Due to Convective Heat Exchange on its Outer Surface." Mathematical and computer modelling. Series: Physical and mathematical sciences 25 (September 30, 2024): 114–20. http://dx.doi.org/10.32626/2308-5878.2024-25.114-120.

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A non-stationary thermal conductivity problem for a two-layer cylindrical shell is formulated. The materials of the constituent layers of the shell are assumed to be homogeneous and isotropic. This shell is convectively heated by the external environment. The system of linear two-dimensional equations for the integral temperature characteristics summed over the component layers of the shell was used as the initial system of equations of the problem under consideration. When obtaining this system, the hypothesis of a linear distribution of temperature along the thickness of the entire shell was

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Safarpour, Hamed, Kianoosh Mohammadi, Majid Ghadiri, and Mohammad M. Barooti. "Effect of Porosity on Flexural Vibration of CNT-Reinforced Cylindrical Shells in Thermal Environment Using GDQM." International Journal of Structural Stability and Dynamics 18, no. 10 (2018): 1850123. http://dx.doi.org/10.1142/s0219455418501237.

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This article investigates the flexural vibration of temperature-dependent and carbon nanotube-reinforced (CNTR) cylindrical shells made of functionally graded (FG) porous materials under various kinds of thermal loadings. The equivalent material properties of the cylindrical shell of concern are estimated using the rule of mixture. Both the cases of uniform distribution (UD) and FG distribution patterns of reinforcements are considered. Thermo-mechanical properties of the cylindrical shell are supposed to vary through the thickness and are estimated using the modified power-law rule, by which

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12

Sofiyev, Abdullah H., and Nicholas Fantuzzi. "Stability Analysis of Shear Deformable Inhomogeneous Nanocomposite Cylindrical Shells under Hydrostatic Pressure in Thermal Environment." Materials 16, no. 13 (2023): 4887. http://dx.doi.org/10.3390/ma16134887.

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In this study, the stability of inhomogeneous nanocomposite cylindrical shells (INCCSs) under hydrostatic pressure in a thermal environment is presented. The effective material properties of the inhomogeneous nanocomposite cylindrical shell are modeled on the basis of the extended mixture rule. Based on the effective material properties, the fundamental relations and stability equations are derived for thermal environments. In this process, the first-order shear deformation theory (FSDT) for the homogeneous orthotropic shell is generalized to the inhomogeneous shell theory. This is accomplishe

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13

Nam, Vu Hoai, Nguyen Thi Phuong, and Vu Minh Duc. "Nonlinear buckling of orthogonal carbon nanotube-reinforced composite cylindrical shells under axial compression surrounded by elastic foundation in thermal environment." International Journal of Computational Materials Science and Engineering 08, no. 04 (2019): 1950016. http://dx.doi.org/10.1142/s2047684119500167.

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Nonlinear buckling and postbuckling of orthogonal carbon nanotube-reinforced composite (Orthogonal CNTRC) cylindrical shells subjected to axial compression in thermal environments surrounded by elastic foundation are presented in this paper. Two layers of shell are reinforced by carbon nanotube (CNT) in two orthogonal directions (longitudinal and circumferential directions). Based on Donnell’s shell theory with von Karman’s nonlinearity and the Galerkin method, the governing equations are established to obtain the critical buckling loads and postbuckling load-deflection curves. The large effec

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Li, Zhun, C. Guedes Soares, and Guang Pan. "Buckling prediction for composite laminated cylindrical shells in underwater environment." Ocean Engineering 258 (August 2022): 111244. http://dx.doi.org/10.1016/j.oceaneng.2022.111244.

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15

Zhang, Chunwei, Qiao Jin, Yansheng Song, et al. "Vibration analysis of a sandwich cylindrical shell in hygrothermal environment." Nanotechnology Reviews 10, no. 1 (2021): 414–30. http://dx.doi.org/10.1515/ntrev-2021-0026.

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Abstract The sandwich structures are three- or multilayered structures such that their mechanical properties are better than each single layer. In the current research, a three-layered cylindrical shell including a functionally graded porous core and two reinforced nanocomposite face sheets resting on the Pasternak foundation is used as model to provide a comprehensive understanding of vibrational behavior of such structures. The core is made of limestone, while the epoxy is utilized as the top and bottom layers’ matrix phase and also it is reinforced by the graphene nanoplatelets (GNPs). The

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16

Zhang, Xueqin, Chaoqun Shi, Yongqiang Kang, Xianbin Yin, Guoqiang Gao, and Guangning Wu. "Flashover characteristics of cylindrical insulator in high-speed sand environment." IEEE Transactions on Dielectrics and Electrical Insulation 24, no. 1 (2017): 455–61. http://dx.doi.org/10.1109/tdei.2016.006014.

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17

Arani, A. Ghorbanpour, M. Ahmadi, A. Ahmadi, A. Rastgoo, and H. A. Sepyani. "Buckling analysis of a cylindrical shell, under neutron radiation environment." Nuclear Engineering and Design 242 (January 2012): 1–6. http://dx.doi.org/10.1016/j.nucengdes.2011.08.022.

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18

Dong, K., and X. Wang. "Wave propagation in laminated piezoelectric cylindrical shells in hydrothermal environment." Structural Engineering and Mechanics 24, no. 4 (2006): 395–410. http://dx.doi.org/10.12989/sem.2006.24.4.395.

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19

Chih-Chiang Hong. "Free Vibration Frequency of Thick FGM Circular Cylindrical Shells with Simply Homogeneous Equation by Using TSDT." Advances in Technology Innovation 5, no. 2 (2020): 84–97. http://dx.doi.org/10.46604/aiti.2020.4380.

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The objective of this study is to provide the frequency solutions of free vibration in thick FGM circular cylindrical shells by mainly considering both shear correction coefficient and nonlinear coefficient term. This paper investigates the effects of third-order shear deformation theory (TSDT) and the varied shear correction coefficient on the free vibration of thick functionally graded material (FGM), the circular cylindrical shells with simply homogeneous equation under thermal environment. The approach of derivations are given as follows, the varied value of shear correction coefficient is

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20

Lambrecht, Armin, Carsten Bolwien, Jochen Erb, Hendrik Fuhr, and Gerd Sulz. "Cylindrical IR-ATR Sensors for Process Analytics." Sensors 20, no. 10 (2020): 2917. http://dx.doi.org/10.3390/s20102917.

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Infrared attenuated total reflection (ATR) spectroscopy is a common laboratory technique for the analysis of highly absorbing liquids and solids. However, in a process environment, maintaining a sufficient sample exchange and cleaning of the sensitive surface of the element is a crucial issue. An important industrial application is the measurement of isocyanate concentrations. Isocyanates are necessary for the fabrication of polyurethane materials and are among the chemicals with the highest production volume worldwide. For process applications, narrowband photometers or MEMS spectrometers are

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21

Chen, Chon, Rong Rong Hu, and Lan Huang. "Study on Characteristics of Cylindrical Air Spring." Advanced Materials Research 308-310 (August 2011): 1992–96. http://dx.doi.org/10.4028/www.scientific.net/amr.308-310.1992.

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Based on the theory of fluid dynamics and principle of thermodynamics, the characteristic of the stiffness, natural frequency and damping of cylindrical air spring are deduced. Moreover, simulation model for dynamic characteristic of air spring is established under the environment. The simulation results show the characteristics of cylindrical air spring is superior and the isolation effect is good.

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22

Shcherbyna, Iurii, and Anna Tereshchuk. "Theoretical foundations of calculation cylindrical parts tank car boilers using the MathCAD environment." Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies", no. 43 (June 18, 2024): 61–75. http://dx.doi.org/10.32703/2617-9059-2024-43-5.

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The article is devoted to the numerical calculation of the cylindrical part a tank car boiler, which is represented as a single-layer shell, and the study of its stress-strain state using the provisions of the semi-momentum theory shells. In some cases, under actual operating conditions of a tank car boiler, when the base metal wears out under the influence of corrosive phenomena arising from the interaction an aggressive environment and a storage and transportation tank, it becomes necessary to assess the stress-strain state and search for the most dangerous areas. The authors of this article

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23

Dong, Lu, Yu Xin Hao, Jian Hua Wang, and Li Yang. "Nonlinear Vibration of Functionally Graded Material Cylindrical Shell Based on Reddy’s Third-Order Plates and Shells Theory." Advanced Materials Research 625 (December 2012): 18–24. http://dx.doi.org/10.4028/www.scientific.net/amr.625.18.

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In this paper, an analysis on nonlinear dynamics of a simply supported functionally graded material (FGM) cylindrical shell subjected to the different excitation in thermal environment. Material properties of cylindrical shell are assumed to be temperature-dependent. Based on the Reddy’s third-order plates and shells theory[1], the nonlinear governing partial differential equations of motion for the FGM cylindrical shell are derived by using Hamilton’s principle. Galerkin’s method is utilized to transform the partial differential equations into a two-degree-of-freedom nonlinear system includin

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24

JEYARAJ, P., C. PADMANABHAN, and N. GANESAN. "VIBRO-ACOUSTIC RESPONSE OF A CIRCULAR ISOTROPIC CYLINDRICAL SHELL UNDER A THERMAL ENVIRONMENT." International Journal of Applied Mechanics 03, no. 03 (2011): 525–41. http://dx.doi.org/10.1142/s1758825111001111.

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This paper presents numerical simulation studies on the vibration and acoustic response-characteristics of an isotropic cylindrical shell under a thermal environment using commercial softwares ANSYS and SYSNOISE. First, the critical buckling temperature is obtained, followed by modal and harmonic response analyses considering pre-stress due to the thermal field in the cylindrical shell, with the critical buckling temperature as a parameter. The vibration response predicted is then used to compute the sound radiation. It is found that there is a significant change in the vibration mode shapes a

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25

Esmailpoor Hajilak, Zanyar, Johar Pourghader, Davoud Hashemabadi, Farzaneh Sharifi Bagh, Mostafa Habibi, and Hamed Safarpour. "Multilayer GPLRC composite cylindrical nanoshell using modified strain gradient theory." Mechanics Based Design of Structures and Machines 47, no. 5 (2019): 521–45. http://dx.doi.org/10.1080/15397734.2019.1566743.

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In this paper, influence of modified strain gradient theory (MSGT) on buckling, free and forced vibration characteristics of the composite cylindrical nanoshell reinforced with graphene nanoplatelet (GPL) in thermal environment is investigated. The material properties of piece-wise functionally graded graphene-reinforced composites GPLRC are assumed to be graded in the thickness direction of a cylindrical nanoshell and are estimated through a nanomechanical model. The results show that GPL distribution pattern, three length scale parameters, number of layers and GPL weight function have import

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Avey, Mahmure, Nicholas Fantuzzi, and Abdullah H. Sofiyev. "Analytical Solution of Stability Problem of Nanocomposite Cylindrical Shells under Combined Loadings in Thermal Environments." Mathematics 11, no. 17 (2023): 3781. http://dx.doi.org/10.3390/math11173781.

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The mathematical modeling of the stability problem of nanocomposite cylindrical shells is one of the applications of partial differential equations (PDEs). In this study, the stability behavior of inhomogeneous nanocomposite cylindrical shells (INH-NCCSs), under combined axial compression and hydrostatic pressure in the thermal environment, is investigated by means of the first-order shear deformation theory (FSDT). The nanocomposite material is modeled as homogeneous and heterogeneous and is based on a carbon nanotube (CNT)-reinforced polymer with the linear variation of the mechanical proper

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27

Ma, Hongliang, Yuanyuan Xue, and Guofu Yin. "Simulation Study on Output Characteristics of Pyrotechnic Devices in Deep Water Environment." Journal of Physics: Conference Series 2891, no. 5 (2024): 052028. https://doi.org/10.1088/1742-6596/2891/5/052028.

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Abstract In order to study the output characteristics and influencing factors of pyrotechnic devices for weapons and equipment in deep-water environments, a simulation model of the action process of the model separation bolt under water load was established, and the changes of separation velocity and displacement of the pyrotechnic device with different variables were calculated with propellant charge, water depth and load shape as variables. The results indicate that, With the increase of propellant charge, the separation velocity of the separation bolt gradually increased, and the maximum se

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Bayat, M. R., M. Mosavi Mashhadi, and O. Rahmani. "Low-velocity impact response of sandwich cylindrical panels with nanotube-reinforced and metal face sheet in thermal environment." Aeronautical Journal 122, no. 1258 (2018): 1943–66. http://dx.doi.org/10.1017/aer.2018.104.

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ABSTRACTEmploying an analytical method, non-linear low-velocity impact response of carbon nanotube (CNT)-reinforced sandwich cylindrical panels in thermal environments is analysed. Two types of core (i.e. homogenous and functionally graded) are considered for sandwich panels. The face sheets of sandwich panels are multi-layer which consist of CNT-reinforced composite (CNTRC) and metal layers. Micromechanical models are used to estimate the material properties of CNTRCs. A higher-order shear deformation theory with a von Kármán-type of kinematic non-linearity provides the equations of motion. T

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Kubota, Takumi, Haruto Ishikawa, and Satoshi Takada. "Drag of a cylindrical object in a two-dimensional granular environment." EPJ Web of Conferences 249 (2021): 03033. http://dx.doi.org/10.1051/epjconf/202124903033.

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The drag of a cylindrical object in a two-dimensional granular environment is numerically studied. It is found that the drag law is fitted by the sum of the yield force and the dynamic force, the latter of which is reproduced by a simple collision model. The angular dependence of the radial stress on the surface of the object is given by the Gaussian below the yield force. The probability of the velocity drops of the object is investigated above the yield force, where this probability is independent of the packing fraction and the drag force.

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Timirov, Yulay Il’darovich, Elena Rafailovna Basyrova, Nailya Mavletovna Khaydarova, Maxim Vil'evich Khazimullin, and Oleg Alekseevich Skaldin. "FORMATION OF CYLINDRICAL NEMATIC-CHOLESTRIC MIXTURE DROPLETS IN AN ISOTROPIC ENVIRONMENT." Materials. Technologies. Design 4, no. 1 (2022): 57–63. http://dx.doi.org/10.54708/26587572_2022_41757.

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31

Gordeyev, Stanislav, Jacob A. Cress, Eric J. Jumper, and Alan B. Cain. "Aero-Optical Environment Around a Cylindrical Turret with a Flat Window." AIAA Journal 49, no. 2 (2011): 308–15. http://dx.doi.org/10.2514/1.j050476.

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32

Mongia, R. K. "Resonant frequency of cylindrical dielectric resonator placed in an MIC environment." IEEE Transactions on Microwave Theory and Techniques 38, no. 6 (1990): 802–4. http://dx.doi.org/10.1109/22.130982.

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Yuhong, Yuan, Huang Yinsheng, Zhong Ye, Li Rui, and Wang Quan. "Blast wave propagation characteristics of cylindrical charge under low pressure environment." Journal of Physics: Conference Series 2891, no. 7 (2024): 072019. https://doi.org/10.1088/1742-6596/2891/7/072019.

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Abstract To address the problem of the influence of low pressure environment on the propagation of blast wave in cylindrical charges, the effects of different low pressures, aspect ratios, and azimuth angles on the peak overpressure and specific impulse of blast wave were investigated using AUTODYN finite element software. The influences of different levels of low pressure, aspect ratios, and azimuth angles on the peak overpressure and impulse of the explosive shock wave were investigated. The results indicate that the critical proportional distance for the peak overpressure of the shock wave

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Xu, Chen, and Huang Yong-feng. "Gamma-ray Burst Afterglows from Cylindrical Jets in a Dense Environment." Chinese Astronomy and Astrophysics 37, no. 1 (2013): 68–76. http://dx.doi.org/10.1016/j.chinastron.2013.01.007.

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Wu, Chuanjia, Xinyan Huang, Shuangfeng Wang, Feng Zhu, and Yongli Yin. "Opposed Flame Spread over Cylindrical PMMA Under Oxygen-Enriched Microgravity Environment." Fire Technology 56, no. 1 (2019): 71–89. http://dx.doi.org/10.1007/s10694-019-00896-8.

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R, Sarannya Kumari, Sunny Kalayathankal, Mathews George, and Florentin Smarandache. "N-Cylindrical Fuzzy Neutrosophic Sets." International Journal of Neutrosophic Science 18, no. 4 (2022): 355–74. http://dx.doi.org/10.54216/ijns.180430.

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In this paper, we introduce a new type of fuzzy Neutrosophic set called n-Cylindrical fuzzy Neutrosophic set (n-CyFNS), with I as independent neutrosophic component. The n-CyFNS can be claimed as the largest extension of fuzzy sets. In n-CyFNS, the degree of positive, neutral and negative membership functions are satisfying the condition, 0≤ βA(x) ≤1 and 0≤ αA n(x) + γAn(x) ≤ 1, 1, is an integer. Also the distance between two n- CyFNS and its properties are also defined. Along with basic operations on n- CyFNSs, we put forward two concepts-Neutrosophic affinity degree Neutrosophic similarity i

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Ding, Minting, and Zhenlei Chen. "Study on a Circular Cylindrical Floating Device and Its Motion Response Characteristics." Journal of Physics: Conference Series 2419, no. 1 (2023): 012010. http://dx.doi.org/10.1088/1742-6596/2419/1/012010.

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Abstract In this paper, a circular cylindrical floating device design is proposed by combining the structural features of the cylindrical Floating Production Storage and Offloading (FPSO) and the deep-sea Spar platform. It is suitable for deep-water oil and gas field development environment in the South China Sea. This floating device adds six floats with a Spar platform hard tank role based on the cylindrical FPSO to improve the buoyant center. This paper analyzes the motion response characteristics of the circular cylindrical floating device in waves by the Eulerian multi-phase flow model of

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Vorkapić, Nikola, Saša Živanović, Nikola Slavković, Zoran Dimić, and Branko Kokotović. "Configuring of 3-axis vertical CNC Machine for Rapid Prototyping with two Translatory and one Rotary Axes." Advanced Technologies & Materials 45, no. 1 (2020): 1–9. http://dx.doi.org/10.24867/atm-2020-1-003.

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This paper describes the configuration of a 3-axis vertical CNC machine tool for rapid prototyping with one rotary and two translational axes. The machine works in a polar-cylindrical coordinate system. The structure of the machine is C’OXZ. The virtual machine model is configured in the PTC Creo software environment. After configuring the virtual machine, the simulation of the CLFbased was performed in the mentioned software environments, and then the verification according to the G-code program in the Vericut software environment was performed. Programming and control of the configured proto

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Brown. "Correcting the Error in Measuring Radiation Received by a Person: Introducing Cylindrical Radiometers." Sensors 19, no. 23 (2019): 5085. http://dx.doi.org/10.3390/s19235085.

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Most human energy budget models consider a person to be approximately cylindrical in shape when estimating or measuring the amount of radiation that they receive in a given environment. Yet, the most commonly used instrument for measuring the amount of radiation received by a person is the globe thermometer. The spherical shape of this instrument was designed to be used indoors where radiation is received approximately equally from all directions. But in outdoor environments, radiation can be strongly directional, making the sphere an inappropriate shape. The international standard for measuri

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Wu, Xianfang, Chen Shao, Houlin Liu, Minggao Tan, and Bing Qu. "Experimental study on cylindircal particle movement in a slurry pump guide vane." Thermal Science, no. 00 (2023): 202. http://dx.doi.org/10.2298/tsci230513202w.

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To investigate the movement characteristics of cylindrical particles within a slurry pump, the particle trajectories, particle distributions, particle velocity, and passing time of particles in the guide vane are tested by high-speed photography. The test results indicate that the pump performance decreases and the wear of the blade pressure side deteriorates with the increase of cylindrical particle densities. The particles primarily flow into the guide vanes from the suction side and flow out from the pressure side. The velocity loss of particles in the guide vanes increases, and the time fo

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Onur, T. O. "Investigation of Parameters Affecting Underwater Communication Channel." Journal of Engineering Sciences 7, no. 1 (2020): F39—F44. http://dx.doi.org/10.21272/jes.2020.7(1).f4.

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Underwater communication has become a widely studied area in recent years and showed great potential to be an area of research. Acoustic communication is often preferred in underwater communication due to its suitability for an underwater diffusion environment. However, in underwater communication, the physical and chemical properties of the water environment affect sound propagation. Therefore, determining and examining parameters affecting channel performance in underwater communication plays an essential role in inefficient communication. In this study, the effects of salinity, depth, noise

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Wang, Ying Zhang, Shang Hua Zhang, Chang Qing Pang, and Jie Li. "Comparison of Luffa Cylindrical Sponge and Plastic Sponge as Carriers in Sequencing Batch Biofilm Reactor for Sewage Treatment." Advanced Materials Research 518-523 (May 2012): 2431–38. http://dx.doi.org/10.4028/www.scientific.net/amr.518-523.2431.

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Luffa cylindrical sponge and plastic sponge were used as carriers in sequencing batch biofilm reactor (SBBR) for sewage treatment in this paper. The removals of suspended solid (SS), chemical oxygen demand (COD) and NH3-N in sewage were studied. The average removal efficiencies of SS, COD and NH3-N with luffa cylindrical sponge were 96%, 89% and 90%, respectively, while these with plastic sponge were 94%, 83% and 80%, respectively. As a natural, cheap and environment friendly biocarrier, luffa cylindrical sponge was easy to get a biofilm with enriched microbes during the first few days of sewa

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Nam, Vu Hoai, Nguyen Thi Phuong, Cao Van Doan, and Nguyen Thoi Trung. "Nonlinear Thermo-Mechanical Stability Analysis of Eccentrically Spiral Stiffened Sandwich Functionally Graded Cylindrical Shells Subjected to External Pressure." International Journal of Applied Mechanics 11, no. 05 (2019): 1950045. http://dx.doi.org/10.1142/s1758825119500455.

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A new analytical approach to investigate the nonlinear buckling and postbuckling of the sandwich functionally graded circular cylindrical shells reinforced by ring and stringer or spiral stiffeners subjected to external pressure is presented in this paper. By employing the Donnell shell theory, the geometrical nonlinearity in Von Kármán sense and developed Lekhnitskii’s smeared stiffener technique, the governing equations of sandwich functionally graded circular cylindrical shells are derived. Resulting equations are solved by applying the Galerkin method to obtain the explicit expression of c

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Ali, Mubarak, Saima Nasir, and Wolfgang Ensinger. "Bioconjugation-induced ionic current rectification in aptamer-modified single cylindrical nanopores." Chemical Communications 51, no. 16 (2015): 3454–57. http://dx.doi.org/10.1039/c5cc00257e.

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Aptamer–protein conjugation inside a confined environment generates a non-homogeneous fixed charge distribution, leading to the emergence of ionic current rectification characteristics in single cylindrical nanopores.

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Li, Zhen, Shuangwei Hu, Rui Zhong, Bin Qin, and Xing Zhao. "Meshless Chebyshev RPIM Solution for Free Vibration of Rotating Cross-Ply Laminated Combined Cylindrical-Conical Shells in Thermal Environment." Materials 15, no. 17 (2022): 6177. http://dx.doi.org/10.3390/ma15176177.

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This paper provides a numerical solution to the vibration of a rotating cross-ply laminated combined conical-cylindrical shell in the thermal environment. Its numerical discrete solution method uses the meshless method. The combined shell assumed the temperature independence of material property is divided to the fundamental conical and cylindrical shell substructures, and the theoretical formulation for each substructure is derived based on the first order shear deformation theory (FSDT) and Hamilton’s principle. The effects of the initial hoop tension and temperature change are considered th

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Qin, Zhong Bao, Jian Feng Guo, Fei Meng, and Xiao Long Hu. "Vibration Analysis of High-Pressure Cylindrical Cylinders." Applied Mechanics and Materials 757 (April 2015): 127–32. http://dx.doi.org/10.4028/www.scientific.net/amm.757.127.

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In order to solve the vibration problems of car high-pressure cylindrical cylinders, Plate and Shell Vibration Theory is used for the calculation and analysis of the vibration characteristics. The vibration frequencies and modes of such cylinders are obtained. At the same time, the corresponding results are gotten through ANSYS12.0 simulation calculation. The similarities and differences of the both vibration frequencies and the changes of the respective modes are compared and analyzed to support the farther safety performance analysis of such cylinders in the vibration environment.

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Vardanyan, A. V., and L. A. Gagiyan. "Cylindrical concentrator with Quasiparabolic directrix." Applied Solar Energy 44, no. 2 (2008): 125–28. http://dx.doi.org/10.3103/s0003701x08020138.

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Li, Hui, Haiyu Lv, Jianfei Gu, et al. "Nonlinear vibration characteristics of fibre reinforced composite cylindrical shells in thermal environment." Mechanical Systems and Signal Processing 156 (July 2021): 107665. http://dx.doi.org/10.1016/j.ymssp.2021.107665.

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Li, Xiao, Wentao Jiang, Xiaochao Chen, and Zhihong Zhou. "Nonlinear forced vibration of rotating composite laminated cylindrical shells under hygrothermal environment." Zeitschrift für Naturforschung A 76, no. 9 (2021): 769–86. http://dx.doi.org/10.1515/zna-2021-0029.

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Abstract This work aims to study nonlinear vibration of rotating composite laminated cylindrical shells under hygrothermal environment and radial harmonic excitation. Based on Love’s nonlinear shell theory, and considering the effects of rotation-induced initial hoop tension, centrifugal and Coriolis forces, the nonlinear partial differential equations of the shells are derived by Hamilton’s principle, in which the constitutive relation and material properties of the shells are both hygrothermal-dependent. Then, the Galerkin approach is applied to discrete the nonlinear partial differential eq

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Hadjadj, A., and S. Maamir. "Sinusoidal geometry effects on heat transfer and environment in a cylindrical configuration." International Journal of Ambient Energy 37, no. 2 (2014): 143–48. http://dx.doi.org/10.1080/01430750.2014.907210.

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