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Artykuły w czasopismach na temat „Beam width etc”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Pangestuti, Endah Kanti, Wage Dwi Fitriyandi, Fajar Arya Ramadhan, and Mohamed Nor Azhari Azman. "Analysis Of The Addition Of Steel Plates Reviewed to The Compresivve Strength Capacity Of The T-Beam." Jurnal Teknik Sipil dan Perencanaan 25, no. 1 (2023): 27–33. http://dx.doi.org/10.15294/jtsp.v25i1.42863.

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Reinforced concrete is used in various constructions, such as buildings, bridges, dams, road pavement, tunnels, etc. Structural strengthening of reinforced concrete beam can be done in various ways, which one is the addition of steel plates bonded to the compression area. Steel plates with a width of 150 mm and 300 mm with a thickness of 2 mm are expected to increase the compressive strength of reinforced concrete beams. Plate installation uses Sikadur 31 CF-Normal adhesive to attach steel plates and beams, and it is hoped that composite properties will occur on both of them. The test object s

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Jiang, Shuan, Li Li Bai, and Wei Chen Xue. "Calculation of Crack Width of Steel-Concrete Composite Beam Prestressed with Internal Tendons." Advanced Materials Research 889-890 (February 2014): 1445–49. http://dx.doi.org/10.4028/www.scientific.net/amr.889-890.1445.

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Steel-concrete composite beam prestressed with internal tendons (SCCPIT) is composed of prestressed concrete slab, steel beam and shear connectors, etc. At present, there is no calculation formula for crack width of SCCPIT in current design codes like European standard Eurocode 4 or American code ASSHTO LERD Bridge Design Specification (2004). In this paper, calculation formulas for crack width of nonprestressed steel-concrete composite beam provided in Code for Design of SteelConcrete Composite Structure (DL/T 50851999) were adopted as a basis for modification. On the basis of available test

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3

Nie, Jian Guo, and Jie Zhao. "Flexural Behavior of Steel Plate-Concrete Composite Beams." Key Engineering Materials 400-402 (October 2008): 37–42. http://dx.doi.org/10.4028/www.scientific.net/kem.400-402.37.

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In this paper, the steel plate-concrete composite (SPCC) beam is developed, in which traditional steel beam in the steel-concrete composite beam is replaced by a steel plate. The aim to develop this type of composite beam is to provide a theoretical basis for design of SPCC structures and SPCC-strengthened structures. In order to investigate the flexural behavior of SPCC beams, tests were conducted on five specimens with loading cases of four-point or three-point bending. All the beams were identical in geometry, longitudinal reinforcement, stirrup, and concrete strength but various in steel p

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Shang, Tianyi, and Weidong Ding. "Influence of gas pressure and gas type on pseudospark electron beam." Journal of Instrumentation 18, no. 09 (2023): P09045. http://dx.doi.org/10.1088/1748-0221/18/09/p09045.

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Abstract Pseudospark discharge is a discharge that occurs in the left band of the Paschen curve. According to previous studies, an electron beam will be generated in the initial stage of pseudospark discharge. This electron beam has the advantages of high energy, high current and self-confinement. It has a promising application in high-power microwave sources, surface treatment of metal materials, etc. To investigate the characteristics of this electron beam, a pseudospark discharge experimental platform is established in this paper. A pseudospark chamber is designed for pseudospark discharge.

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Wang, Xiaodong, Pingjian Liu, Yixuan Sun, and Wenqi Wang. "Study on Breaking Concrete Structures by Pulse Power Technology." Buildings 12, no. 3 (2022): 274. http://dx.doi.org/10.3390/buildings12030274.

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Using pulse power technology to break concrete structures can reduce environmental pollution, save energy, and increase safety and reliability. The whole process of concrete beam subjected to shock wave generated by pulse power discharge was simulated and analyzed. An experiment of breaking reinforced concrete beams by metal wire explosion in liquid was carried out. And the main parameters are pulse power discharge voltage, copper wires section size, concrete beam material strength, drilling parameters, etc. The results show that with the increase of discharge voltage and the total area of cop

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6

Jiang, Shuan, Li Li Bai, and Wei Chen Xue. "Calculation of Crack Width of Steel-Concrete Composite Beams Prestressed with Internal Tendon." Advanced Materials Research 850-851 (December 2013): 183–87. http://dx.doi.org/10.4028/www.scientific.net/amr.850-851.183.

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Steelconcrete composite beam prestressed with internal tendon (SCCPIT) is composed of prestressed concrete slab, steel beam and shear connectors, etc. At present, there is no calculation formula for crack width of SCCPIT in current design codes Eurocode 4, ASSHTO or Chinese Code for Design of Steel Structures (GB 500172003). In this paper, the calculating formulas for crack width provided in Code for Design of SteelConcrete Composite Structure (DL/T 50851999) were adopted as a basis for modification. On the basis of available test results, the calculation formulas for uneven coefficient of rei

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7

Chandana, Viswanadham, and Mallikarjuna Rao Prudhvi. "STUDIES ON PERFORMANCE OF BACK FED 2-6 GHZ LINEAR ARRAYS OF H-PLANE SECTORAL HORNS." International Journal of Applied and Advanced Scientific Research 2, no. 2 (2017): 229–39. https://doi.org/10.5281/zenodo.1050431.

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The popular electronic systems like Satellite transponders, Radars, jammers, trackers, communication systems, etc., were designed with phased array antennas in their transmitter and or receiver sections, to provide electronically steered beams through passive and active beam steering techniques. In this paper, the performance of eight elements linear array of sectoral horns, is studied, simulated and results are presented. The design of the array with eight sectoral horn elements is carried out with changes in the parameters and configurations to obtain the improvements in the specifications.

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8

Utkin, Vladimir S., and Sergey A. Solovyev. "RELIABILITY ANALYSIS OF REINFORCED CONCRETEELEMENTSWITH NORMAL CRACKS (ON RC BEAM EXAMPLE)." International Journal for Computational Civil and Structural Engineering 14, no. 3 (2018): 142–52. http://dx.doi.org/10.22337/2587-9618-2018-14-3-142-152.

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The purpose of research is development of methods for reliability analysis of structural reinforced concrete elements (on example of reinforced concrete beam) according to criterion of the normal cracks length in tensile zone of concrete. Cracks in tensile zone of concrete in beams leads to displacement of the beam's neutralaxis towards the compressed part of the concrete, thereby increasing the compressionstress in the concrete, to the increasing of the stress in the reinforcement bars on the crack width, to the growth of corrosion processes, etc. This leads to the decreasing of beams mechani

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9

He, Chun Qing, Jun Cheng Wang, Jun Zhu, and Shao Jie Wang. "Design and Simulation of a Trap-Based Pulsed Slow Positron Beam." Materials Science Forum 733 (November 2012): 314–17. http://dx.doi.org/10.4028/www.scientific.net/msf.733.314.

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A simple pulsed slow positron beam based on a Penning-trap has been designed and is being constructed in Wuhan University. The cooled positrons from the trap with very low energy dispersion are dumped and chopped to pulses of a few tens of ns in width. Positron pulses are bunched by adjusting the potential of drift tube using an arbitrary wave generator, then accelerated to the target. Influences of the pulse width, the energy dispersion of positrons etc. on the time resolution of bunched positron pulse are simulated. The result shows that lower energy dispersion of positrons leads to much nar

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10

Куреннов, Сергей Сергеевич. "ОПТИМАЛЬНОЕ ПРОЕКТИРОВАНИЕ СТАТИЧЕСКИ ОПРЕДЕЛИМОЙ БАЛКИ ПРИ ОГРАНИЧЕНИИ НА МАКСИМАЛЬНЫЙ ПРОГИБ". Aerospace technic and technology, № 1 (25 січня 2020): 28–34. http://dx.doi.org/10.32620/aktt.2020.1.05.

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Here is solved the optimization problem for the longitudinal depth distribution in the beam with a limitation on the maximum value of deflection. A review of the references is done, and it is shown that the known solutions are either erroneous, because they are based on false hypotheses, or have a narrow field of application, limited only to symmetrical constructions for which the point of the maximum deflection is known a priori. The paper considers a beam of the rectangular cross-section of constant width. The beam is assumed to be statically determinate, and the load is arbitrary and asymme

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11

Wang, Peng Fei, and Xiu Hui Diao. "Optimization Design of the Crane Girder Based on Adaptive Genetic Algorithm." Advanced Materials Research 591-593 (November 2012): 123–26. http://dx.doi.org/10.4028/www.scientific.net/amr.591-593.123.

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With taking weight of single main beam of gantry crane as objective function, and taking main beam upper & lower cored, diagonal & horizontal bracing, and width & weight as design variable, this essay adopted population diversity adaptive genetic algorithm to optimize its structure and improved program design through MATLAB. This algorithm could accelerate convergence speed, which make much it easier to realize comprehensive optimal solution, since it effectively avoided weakness of basic genetic algorithm, such as partial optimal solution, prematurity and being lack of continuity,

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12

Rana M. Taha. "Hole Drilling in Polymethyl Methacrylate (PMMA) Using CO2 Laser." Diyala Journal of Engineering Sciences 7, no. 1 (2014): 30–39. http://dx.doi.org/10.24237/djes.2014.07103.

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Laser sources are used in a large variety of applications for material processing. It is mainly used for welding, cutting, drilling, laser annealing, etc. This study narrows the scope down to one of the process, namely, laser drilling.The hole depth, width and penetration velocity of evaporation depend on different parameters such as power, material, exposure time, distance between drilling tool and the material, the drilling tool, etc. In this paper; the laser beam was used as drilling tool. 16W CO2 laser (10.6μm) and transparent Perspex (PMMA) which is the abbreviation of polymethyl methacry

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13

V., Saidulu*. "PERFORMANCE OF CO-AXIAL PROBE FED RECTANGULAR MICROSTRIP ANTENNA WITH RADOME THICKNESS AND DILECTRIC CONSTANTS." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 6, no. 7 (2017): 585–96. https://doi.org/10.5281/zenodo.829813.

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This paper presents the variation of some selected parameters of a co-axial probe fed rectangular microstrip antenna as a function of Radome thickness and dielectric constant. Better range of radome thickness at 2300MHz in S-Band is found to be 0.1-0.6 mm with superstrate dielectric constant of 2.2. To give a maximum VSWR of 3:1. The better range of superstrate (a) Dielectric constant is up to 5 at 0.1mm thickness. (b) Dielectric constant is up to 3 at 0.2-0.3mm thickness (c) Dielectric constant is up to 2 at 0.3-0.6mm thickness at a maximum VSWR of 3:1. Some characteristics of co-axial fed re

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14

Lu, Yuxuan. "Research on Multi-Beam Line Finding Problem and Optimal Line Finding Path based on Exhaustion Method." Frontiers in Computing and Intelligent Systems 8, no. 2 (2024): 29–33. http://dx.doi.org/10.54097/xs1a2489.

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In this paper, the multi-beam line measurement problem is studied, solving the relevant data of different seabed slope and line measurement, and establishing a multi-beam line measurement model based on it, simulating the work of multi-beam line measurement, using ergodic and iterative algorithms, to achieve the best line measurement path design and calculation of uneven sea area. First of all, the mathematical model of multi-beam line surveying with variable direction of line surveying is obtained through geometric relation and sine and cosine theorem, etc., and the coverage width , overlap r

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15

Kurennov, Sergiy, Kostiantyn Barakhov, Igor Taranenko, and Volodymyr Stepanenko. "A genetic algorithm of optimal design of beam at restricted sagging." RADIOELECTRONIC AND COMPUTER SYSTEMS, no. 1 (February 23, 2022): 83–91. http://dx.doi.org/10.32620/reks.2022.1.06.

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A genetic algorithm for solving the problem of optimal beam material distribution along length at a given restriction on maximum sagging value is suggested. A review of literature sources is conducted and it was shown that existing solutions cover partial cases only in which the position of the point with maximum sagging was defined previously. In the paper presented I-section beam with constant proportions is considered, i.e., beam width, caps, and web thickness are proportional to beam height in the current cross-section. A statically determined beam is being considered. The load applied to

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16

Zhou, Yong Chao, and Tie Jun Sun. "Interface Shear Stress Analysis of Concrete Beam Strengthened with CFRP." Applied Mechanics and Materials 71-78 (July 2011): 1348–53. http://dx.doi.org/10.4028/www.scientific.net/amm.71-78.1348.

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Based on elastic theory, the four basic assumptions and the failure model of concrete beams strengthened with CFRP, deduced the formulae about the concrete beams strengthened with CFRP with concentrated load. Results show the biggest interface shear stress is at the at the anchor end, it not only relate to the material property of CFRP and concrete, but also to the thickness, width and bending moment at the anchor end etc.. Reducing CFRP stiffness and thickness or increasing viscose layer thickness, these can reduce the maximum interface shear stress at the end of anchoring.

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17

Kouider, Nadia, Yazid Hadidane, and Mohammed Benzerara. "Numerical investigation of the cold-formed I-beams bending strength with different web shapes." Frattura ed Integrità Strutturale 16, no. 59 (2021): 153–71. http://dx.doi.org/10.3221/igf-esis.59.12.

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The wide use of cold-formed sections (CFS) in the field of steel constructions, favored by the multiple advantages they offer (lightness, ease of installation, etc.), has led us to reflect on a new process for manufacture of metal beams allowing the design of very large span hangars and a reduction in instability problems. This paper presents a study of the theoretical and numerical behavior of a large span CFS beam with different webs, a solid web, a triangular corrugated web, and a trapezoidal corrugated web. These beams are stressed by a concentrated bending load at mid-span. Numerical mode

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18

M., Subramania Siva, and Jeyakumar G. "Universal Automobile Headlight Control Module for High Beam Adaptation during Night Vision Travel an Embedded Design Approach." International Journal of Reconfigurable and Embedded Systems 7, no. 1 (2018): 34–42. https://doi.org/10.11591/ijres.v7.i1.pp34-42.

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Road accidents during night travel increases day by day and vision impairment due to high beam contributes to the majority of the total fatalities. Headlights of vehicles pose a great danger during night driving. The drivers of most vehicles use high/bright beam while driving at night. This causes a discomfort to the person travelling from the opposite direction. The driver experiences a sudden glare caused due to the high intense headlight beam from the other vehicle coming towards him from the opposite direction. We are expected to dim the headlight to avoid this glare. This glare causes a t

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19

Metrikine, A. V., and H. A. Dieterman. "Three-Dimensional Vibrations of a Beam on an Elastic Half-Space: Resonance Interaction of Vertical-Longitudinal and Lateral Beam Waves." Journal of Applied Mechanics 64, no. 4 (1997): 951–56. http://dx.doi.org/10.1115/1.2789005.

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Three-dimensional vibrations of a Euler-Bernoulli beam on an elastic half-space are investigated. In the model the beam has a finite width and the half-space and beam deflections are equal along the centre line of the beam. It is shown that the vertical and longitudinal beam vibrations are uncoupled from the lateral ones. The dispersion relations for the lateral and vertical-longitudinal waves in the beam are derived and the respective dispersion curves are plotted. These curves can cross each other due to the different equivalent stiffnesses of the half-space in vertical and lateral direction

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20

SURESH KUMAR, S., Anish NAIR, G. Praveen MUTHU KUMAR, V. MUTHU KRISHNAN, and M. RAMESH KANNA. "Fabrication and Investigation of Al2024-B4c-Tic Hybrid Metal Matrix Composites using Laser Beam Machining." INCAS BULLETIN 12, no. 3 (2020): 229–34. http://dx.doi.org/10.13111/2066-8201.2020.12.3.19.

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The use of unconventional machining technique for Aluminum based Metal Matrix Composites [MMCs] are generated considerable interest in machining. In the aviation industry, in order to obtain a high precision, a good surface finishing and high working speed, the processing of these hard materials is done with the help of the fiber beam laser). The objective is to determine the mechanical properties of the hybrid composite and further investigate its machinability. The aerospace industry uses the laser machining for its machining process like drilling the cooling holes etc. Standard frequency an

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21

Ma, Yuetong, Yanlin Li, and Bohui Yang. "Research On Multi-Beam Line Measurement Design Based on Genetic Algorithm." Highlights in Science, Engineering and Technology 101 (May 20, 2024): 126–33. http://dx.doi.org/10.54097/7axgf016.

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This paper aims to measure the seabed depth using a multibeam survey line scheme and analyze its performance in a real sea area. The multibeam depth measurement system can send and receive multiple sound waves in a plane perpendicular to the survey line, achieving high accuracy, resolution and efficiency. This paper builds a mathematical model, using geometric analysis, vector algebra, iteration, traversal and other methods, to determine the multibeam depth measurement coverage width model, and find the variable relationship of survey line length, spacing, overlap rate, slope, etc. Using a rec

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22

Nema, Aashish, and Dr Rajeev Chandak. "Review on Analysis of Structure and Design of Steel Bridge Using Staad Pro Software." International Journal for Research in Applied Science and Engineering Technology 11, no. 3 (2023): 2325–29. http://dx.doi.org/10.22214/ijraset.2023.49867.

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Abstract: In this study the T-beam bridge is to be analysis on the staad pro sofware. A T-beam bridge is composite concrete structure which is composed of slab panel, longitudinal girder and cross girder. This project looks on the work of analysis and design of bridge deck and beam on software the specific bridge model is taken of a particular span and carriageway width the bridge is subjected to different IRC loadings like IRC Class AA, IRC Class 70R tracked loading etc. in order to obtain maximum bending moment and shear force. From the analysis it is observed and understand the behavior of

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23

Choi, Insung, Heon min Seo, In-Chul Jung, Jungsoo Choi, In-Duck Park, and Jeong Suh. "Study on the Electron Beam Repair Welding of 5000 Aluminum Alloys." Journal of Welding and Joining 42, no. 5 (2024): 530–38. http://dx.doi.org/10.5781/jwj.2024.42.5.10.

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Electron beam welding (EBW) has been attracted due to its high energy density, high depth-to-width ratio, low thermal strain, compared with arc and laser welding. In addition, it ensures high quality weld joint in structural metals in a wide range of thickness from 0.025 mm to 300 mm. Therefore, EBW is widely used in industries such as automotive, aviation, nuclear power plant, etc. Although a lot of studies on EBW for several decades have been presented, EB based repair welding with supplement of filler metal has less reported. In this work, EB repair welding for 5083 aluminum alloys was inve

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24

Hutami, Patricia, Leo S. Tedianto, and Sunarjo Leman. "ANALISIS PENGARUH PANJANG PROFIL TERHADAP KEKUATAN HEXAGONAL CASTELLATED BEAM DENGAN METODE ELEMEN HINGGA." JMTS: Jurnal Mitra Teknik Sipil 3, no. 1 (2020): 1. http://dx.doi.org/10.24912/jmts.v3i1.6943.

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Castellated beam actually was an original IWF beam which is cut by several pattern and welded properly in different part to provide higher profile. There are several factors that impact the strength of castellated beam such as, opening angle, cutting width, profile length, etc. This analysis aims to determine the relationship between profile lengths of castellated beam with the strength that the profile could bear until it fully failed, also observing buckling and failure behaviour on castellated beam using finite element method. This issue is necessary due to the characteristic of steel which

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25

Sedao, Xxx, Thierry Sarnet, José Luis Hernandez, Malte Schulz Ruhtenbuerg, and Stephan Krantz. "Edge Isolation Using Ultra-Short Pulse Laser Materials with a Top-Hat Beam Profile." Advanced Materials Research 321 (August 2011): 234–39. http://dx.doi.org/10.4028/www.scientific.net/amr.321.234.

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Laser grooving is an existing industrial solution for solar cell junction isolation. However there is still plenty room to improve this process. Potential approach includes choosing proper laser wavelength, tuning laser pulse width and laser focus beam profile, etc. We have recently investigated laser edge isolation of crystalline silicon solar cells using an ultra-short pulse laser. In this study we carried out isolation test using the same laser with a top-hat beam profile. A comparative study between isolation using top-hat and Gaussian is launched. The geometry of laser scribed grooves and

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26

Xiu, Yu Feng. "Improved Design of Universal Multi-Function Focusing Mirrors for Laser Heat Treatment." Advanced Materials Research 338 (September 2011): 697–700. http://dx.doi.org/10.4028/www.scientific.net/amr.338.697.

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The laser heat treatment is a processing method of heat treatment on the surface of the metal part with a higher power density laser beam, mainly including laser surface hardening , laser annealing , laser surface alloying(lsa) and laser surface coating, it is width applied to machinery manufacturing, equipment maintenance, mold manufacturing, etc. It has gradually been recognized and adopted because of its unique characteristics.In this paper, focusing mirrors for improved key-parts of the laser heat treatment equipment have been analyzed and introduced, and pointed out the problems which sho

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Kant, Niti, and Vishal Thakur. "Combined influence of axial electron temperature and exponential plasma density ramp on the self-focusing of a chirped laser in plasma." Zeitschrift für Naturforschung A 75, no. 7 (2020): 671–75. http://dx.doi.org/10.1515/zna-2020-0021.

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AbstractAn analysis of the self-focusing of highly intense chirped pulse laser under exponential plasma density ramp with higher order value of axial electron temperature has been done. Beam width parameter is derived by using paraxial ray approximation and then solved numerically. It is seen that self-focusing of chirped pulse laser is intensely affected by the higher order values of axial electron temperature. Further, influence of exponential plasma density ramp is studied and it is concluded that self-focusing of laser enhances and occurs earlier. On the other hand defocusing of beam reduc

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Nefyodov, Eugeniy I., Vyacheslav P. Zayarnyi, Nina I. Kiryanova, and Igor N. Ponomarev. "Development of exact mathematic models for planar slotted traveling wave antennas using the dyadic Green function and their experiment foundation." Physics of Wave Processes and Radio Systems 24, no. 1 (2021): 22–31. http://dx.doi.org/10.18469/1810-3189.2021.24.1.22-31.

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Exact mathematic models were developed for traveling wave antennas with a constant slot width based on the dyadic Green function, taking into account both the main and cross-polarization components of the field in the far radiation zone. The possibility of using these models as basic models for studying the electrodynamic properties of traveling wave antennas with a different slot configuration (linearly, exponentially tapering, etc.) is justified. The influence of the geometric parameters of the investigated traveling wave antennas on their characteristics was studied by means of using the es

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V, Srikumaran. "D.C. Magnetron Sputtering Coating on Trenches." Journal of Manufacturing Engineering 16, no. 1 (2021): 029–31. http://dx.doi.org/10.37255/jme.v16i1pp029-031.

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The development and application of plasma processing such as plasma assisted CVD and PVD become highly important in various industrial fields such as microelectronics, sensors, solar cells, automobiles, cutting tools, etc. In PVD different process are used such as Vacuum Evaporation, Electron Beam evaporation, Sputtering etc. But all processes have common limitation of one as such deposition is inline sight. It is difficult to achieve uniform coating on complex surfaces, holes and trenches. The width dimension and higher aspect ratio (Depth: width >1) of trenches generally in compatible wit

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V.Saidulu. "Design Inset Fed Microstrip Patch Antenna for L-Band Applications." International Journal of Innovative Technology and Exploring Engineering (IJITEE) 10, no. 5 (2021): 4–7. https://doi.org/10.35940/ijitee.D8595.0210421.

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Present paper focuses on design and simulation of an inset fed rectangular microstrip patch antenna for GPS applications. The proposed antenna is designed at frequency 1.9 GHz which comes in L-Band region and simulated using Electromagnetic Simulator such as HFSS simulation software with three different dielectric substrates and comparing their performance characteristics such as gain, bandwidth, beam width, VSWR and return loss. The simulation results shows that the maximum bandwidth is obtained with FR4 substrate and the minimum bandwidth is found with Arlon AD320 substrate, where as the max

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RAJPUT, NITUL S., ABHISHEK K. SINGH, NEERAJ SHUKLA, and VISHWAS N. KULKARNI. "ELECTRICAL TRANSPORT CHARACTERISTICS OF FOCUSED ION BEAM FABRICATED Au, Cu NANOWIRES." International Journal of Nanoscience 10, no. 01n02 (2011): 7–12. http://dx.doi.org/10.1142/s0219581x11007521.

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Nanowires of Au and Cu were fabricated using a top–down method in which focused ion beam (FIB) milling process has been used. The width of the fabricated nanowires has been kept in the range of 45 to 300 nm and the length in the range of 2–10 μm. In situ electrical measurements of the nanowires were carried out. The resistivities of these wires are found to be higher (five to nine times larger than their bulk values). These results have been understood on the basis of increase in the electron surface scattering due to one-dimensional confinement of the electrons. Also, other effects such as na

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Shafique, Rabia, Kelash Kanwar, Fida Hussain, et al. "Comparison of different feeding techniques for a patch antenna at an X frequency band to evaluate its quantitative impact on the antenna’s parameters." Journal of Applied Research and Technology 18, no. 6 (2020): 341–61. http://dx.doi.org/10.22201/icat.24486736e.2020.18.6.1350.

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In this paper, the comparison of different feeding techniques for a patch antenna, at X frequency band, to evaluate its quantitative impact on the different antenna parameters is presented. When different feeding techniques are applied at the X band spectrum to improve the impedance matching the performance of various characteristics parameters such as radiation pattern, gain, beam width etc are influenced. To find how much these are influenced a comparative analysis is carried out and results are presented in this paper. For investigation purpose, the patch antenna and the various feeding tec

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Hou, Qiwen, Hang Zhang, and Guirong Xu. "Multi-beam line observation optimization strategy based on random variable unitary iterative model." Highlights in Science, Engineering and Technology 82 (January 26, 2024): 292–301. http://dx.doi.org/10.54097/63km2681.

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Multibeam system has many advantages such as large measurement range, fast speed, high accuracy, etc., which can be applied in many fields such as marine topographic survey. In this paper, the relationship between coverage width and other variables is obtained by analyzing the geometric relationship between each parameter, and a multibeam sounding model based on geometric relationship is established. And based on the intelligent optimization algorithm, an iterative optimization model with random variable singularization is designed independently. And the actual terrain data were visualized and

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Yatongchai, Auychai, Peerasan Khamsalee, and Rangsan Wongsan. "EFFICIENCY IMPROVEMENT FOR ELECTRONICALLY STEERED DUAL-BEAM ANTENNA BY USING METAMATERIAL BASED RADOME." Suranaree Journal of Science and Technology 30, no. 4 (2023): 010249(1–16). http://dx.doi.org/10.55766/sujst-2023-04-e0862.

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Efficiency improvement for electronically steered dual-beam antenna by using metamaterial based radome are a PCB based circular-patch antenna design for dual beam steering is presented. This design employs the symmetrical slots inserted into the surface at eight angles of circular-patch antenna, thus, the original circular-patch antenna is reconfigured as consisting of eight small square-patches placed on eight angles and separated by such the slots. The beam steering property of this antenna can be implemented by controlling the on/off state of PIN diodes, which connected between each small s

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Deng, En-Feng, Yu-Han Wang, Zhe Liu, Yong-Ji Song, Zhen Wang, and Dian-Bin Cao. "Experimental Study and Numerical Simulation for the Seismic Performance of an Innovative Connection between a Flat CFST Column and an H Beam." Buildings 12, no. 6 (2022): 735. http://dx.doi.org/10.3390/buildings12060735.

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A concrete-filled steel tube (CFST) column permits convenient and fast construction, and its use for high-rise buildings is increasing. Meanwhile, the CFST structure has great potential for use in residence buildings, owing to its smooth evaluation. A connection for a flat CFST column has also attracted increasing attention from scholars. An innovative connection between a flat CFST column and an H beam was proposed and cyclically tested in this paper. The flat CFST column, with a width that is equal to the thickness of the partition wall, was adopted to avoid the protrusion of the column into

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Liu, Shi Mei, and Dong Sheng Huang. "Effection of Relevant Parameters of Infilled Frame Wall on its Structural Lateral Stiffness." Advanced Materials Research 255-260 (May 2011): 1979–83. http://dx.doi.org/10.4028/www.scientific.net/amr.255-260.1979.

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Statical analysis of infilled frame structure was conducted on 3D finite element models by means of software ANSYS10.0. Analyses on relevant parameters of infilled frame walls with or without openings have been carried out seperately, and it is found that the relevant stiffness of the model gradually increases with the ratio of the wall’s width to its height. However, the effection of the width to height ratio of the wall on its structural lateral stiffness becomes much smaller when the value of the width to height ratio is larger than 1.5. The effection can be basically ignored when the width

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Nagaoka, Shiro, Hideo Horibe, Jin Ping Ao, and Seiichi Tagawa. "A Fundamental Study of the Electron Beam Lithography beyond Sub 100nm Process and its Application." Advanced Materials Research 1109 (June 2015): 617–25. http://dx.doi.org/10.4028/www.scientific.net/amr.1109.617.

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It is well known that electron beam lithography is one of the potential candidates to fulfill of the demand of the miniaturization of the design rule of semiconductor integrated circuits beyond sub 100nm size with high reproducibility. It is also a fact that the resolution is recognized to depend on the various factors which are oriented to the machine and process conditions, for example, electron beam diameter, the intensity distribution of the beam itself, the resistance properties polymers, the development conditions, etc. Therefore, it is thought that it is impossible to be derivable direc

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Dr., V. Saidulu. "Dielectric Cover Layer Thickness Effect on Circular Microstrip Antenna Parameters." International Journal of Recent Technology and Engineering (IJRTE) 9, no. 6 (2021): 257–61. https://doi.org/10.35940/ijrte.F5578.039621.

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<strong>Abstract</strong>—This paper studies the effect of dielectric cover layer thickness on circular microstrip patch antenna parameters such as gain, bandwidth, beam-width, radiation patterns, return loss and VSWR. The proposed antenna is designed with 2.4GHz frequency in S-Band region. This operating frequency useful in ISM band applications. Circular patch antenna is designed with cavity model analysis and simulated using HFSS simulation software (Electromagnetic simulator). The coaxial probe fed is used for antenna design. In this paper the effect of dielectric cover layer on ante

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Gu, Chunwang, Hao Liu, and Min Yi. "Lightweight Fan-Beam Microstrip Grid Antenna for Airborne Microwave Interferometric Radiometer Applications." Micromachines 14, no. 1 (2023): 228. http://dx.doi.org/10.3390/mi14010228.

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The microwave interferometric radiometer (MIR) uses aperture synthesis technology to equate multiple small-aperture antennas into a large-aperture antenna to improve spatial resolution. At present, MIR antennas that operate at frequencies above the C-band mostly use horn antennas, waveguide slot antennas, etc., which have the disadvantages of a high profile and large mass. In this paper, a new type of miniaturized, low-profile, and lightweight K-band fan-beam microstrip grid antenna is designed for the airborne campaign of the K-band one-dimensional MIR of a Microwave Imager Combined Active an

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Irfansyah, Ade, Sudrajat Sudrajat та Lailatul Fitriyah. "SIMULASI ANTENA DIPOLE ½ λ DENGAN FREKUENSI KERJA 128,4 MHz UNTUK RADIO PEMANCAR ATIS MENGGUNAKAN SOFTWARE SIMULASI DI BANDAR UDARA INTERNASIONAL HUSEIN SASTRANEGARA BANDUNG". Jurnal Penelitian 4, № 4 (2020): 27–35. http://dx.doi.org/10.46491/jp.v4e4.473.27-35.

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VHF telecommunications radio equipment, especially ATIS equipment is equipment used to inform information around the airport, such as weather, taxiways, runaway, etc. ATIS equipment works on frequencies between 118-137 MHz. The problem that arises is in the ATIS equipment that is the lack of antenna beam coverage on the ATIS radio transmitter, which is <100 NM, while the normal ATIS beam range is in the range of 150-200 NM. The author simulates dipole antenna ½ λ using the CST studio SUITE software application and compares the results of the simulation with the antenna specifications on the

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Chen, Rong, Wang Ping, and Hao Xu. "Influence of Structural Parameters on Mechanical Properties of Double-Block Ballastless Track." Applied Mechanics and Materials 84-85 (August 2011): 188–93. http://dx.doi.org/10.4028/www.scientific.net/amm.84-85.188.

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A high degree of integrity is the most remarkable feature that makes double-block ballastless track different from other ballastless track structure. Based on the beam/plate theory on elastic foundation, influences of several structural parameters (such as size of track slab and support layer, support stiffness of the subgrade, etc) on stress of the ballastless track system under the axle load of 300kN were studied in order to obtain further understanding of the mechanic performance of double-block ballastless track under the train load. Results show that: structure of double-layer combined st

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Baltazar Barrón, Rebeca, Celso Gutiérrez Martínez, Jacobo Meza Pérez, and José Alfredo Torres Fórtiz. "Design and evaluation of a free-space optical communications link using pulse width modulation (PWM)." Ingeniería Investigación y Tecnología 26, no. 2 (2025): 1–14. https://doi.org/10.22201/fi.25940732e.2025.26.2.013.

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Free-space optical communications (FSO) use light as information carrier. Light travels through atmosphere or vacuum and reaches a distant receiver. Light is generated by semiconductor lasers (LDs) or light-emitting diodes (LEDs) and is modulated by varying the injection current on these devices. To carry information, basic modulation techniques are analog as intensity (IM), amplitude (AM), frequency (FM) or phase (PM). However, pulse time modulation (PTM) techniques as pulse-width modulation (PWM) or pulse-position modulation (PPM) are more performant. In PWM, information is imprinted on the

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Chen, Sennian. "Photon Wave-particle Hybrid Structure and Wheeler’s Single Photon Double-slit Delayed Choice Experiment." Physical Science International Journal 26, no. 11-12 (2022): 49–59. http://dx.doi.org/10.9734/psij/2022/v26i11-12774.

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The interpretation of single-photon double slit Wheeler's delayed choice experiment leads to a weird inference: "what observer does now can change what happened in the past". It subverts our cognitions. Other interpretations are also in dispute. I try to find another possible way that can better explain the experiments. For this purpose, we try to reacquaint what is a photon; what structure it possesses, and how the structure influences photon behavior. In 1905 Einstein supposed that the photon is a quantum of EM radiation; according to the quantum interpretation, the probability density of a

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Pradhan, Spandan Swarup. "Experimental Study and Numerical Modelling on Flexural and Shear Strengthening of RC Beam with Prestressed FRP Bars." International Journal for Research in Applied Science and Engineering Technology 11, no. 5 (2023): 2047–52. http://dx.doi.org/10.22214/ijraset.2023.51645.

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Abstract: The most prevalent and widely used building material in the world is reinforced concrete. The primary building material for the majority of constructions, including buildings, bridges, etc., is reinforced concrete. Because of various factors, some of these buildings or portions of them are failing to perform as designed. The best solution to increase the load carrying capacity and extend the useful life of these inadequate structures is to strengthen them because replacing them would need significant investments and not be an appealing alternative. Even though the effectiveness of ot

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Xu, Liang, Zhefeng Qiu, Yang Li, Yidan Dong, and Xiaoyong Zhou. "Rigid Spliced Box Girder Bridge under the Action of Foundation Settlement Difference Analysis of Mechanical Behavior of Splice Section." Journal of Physics: Conference Series 2468, no. 1 (2023): 012093. http://dx.doi.org/10.1088/1742-6596/2468/1/012093.

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Abstract In a main line viaduct widening project, the old bridge is 35m+55m+35m three-span variable section prestressed concrete continuous box girder, which has the characteristics of large width, long span, variable section of beam body, large cantilever (4.05m), and transverse prestressed steel beams arranged on the bridge panel, etc. The old and new box girders adopt rigid joint scheme. Articles on rigid splicing box girder bridge in foundation settlement under the action of splicing mechanical properties to carry out the finite element analysis, the results show that the new bridge under

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Feng, Di, Chun Xi Zhang, and Yuan Hong Yang. "Focusing Properties of the Visible Light Wave through Plasmonic Lenses with Subwavelength Chirped Slits." Advanced Materials Research 586 (November 2012): 356–62. http://dx.doi.org/10.4028/www.scientific.net/amr.586.356.

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Focusing properties of a new kind of plasmonic lenses are investigated in the visible wavelength range through a subwavelength metallic chirped slit arrays which have the same depth but chirped widths. The chirped widths of slits are like a piece-wise-linear distribution which will be approximated by linearly increasing the width of a subwavelength feature and can build up a required phase front for focusing. We analyzed the focusing characteristics of different metallic lenses (silver and gold, respectively) with chirped widths that are obtained by generalizing the relevant phase delay for TE

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Hu, Zhangqi, Taohua Chen, Mengfu Wang, Weirong Lu, and Ran He. "Seismic Performance and Mechanical Mechanism of Steel-Enhanced Damping Concrete Core Wall with Concealed Steel Plate Bracings under Oblique Loading." Advances in Civil Engineering 2022 (June 1, 2022): 1–15. http://dx.doi.org/10.1155/2022/7827506.

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This article focuses on the seismic performance and mechanical mechanisms of core walls under biaxial earthquakes. Through the oblique loading test (biaxial loading test) on one 1/6 scale steel-enhanced damping concrete core wall with steel plate bracings, the failure patterns, the load-bearing capacities, the yield mechanisms, and the strain distributions, etc. were investigated. Comparisons were made with the available test results of the authors’ previously unidirectional tested core walls and the tests completed by other scholars. The oblique tested core walls exhibited lower initial stiff

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Yadav, Rana Pratap, Vinay Kumar, and Rajveer Dhawan. "Design and development of patch compensated wideband Vivaldi antenna." International Journal of Microwave and Wireless Technologies 10, no. 9 (2018): 1081–87. http://dx.doi.org/10.1017/s1759078718000983.

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AbstractDesign and fabrication of a microstrip feedline-based Vivaldi antenna in the frequency range of 6.0–8.0 GHz have been presented. The Vivaldi antenna is a planar antenna, fabricated at the microstrip feedline by having an exponentially tapered slot profile on it. An optimized computer-aided design has been developed and simulated for the desired radiation parameters like voltage standing wave ratio, bandwidth, directionality, beam-width, etc. The optimized design has been fabricated and tested. Wherever the results are not found as desired; problem has been comprehensively investigated

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Wells, Oliver C., Stephen A. Rishton, and Tim Bromage. "Studies of dental samples by the low-loss electron method in the field emission SEM." Proceedings, annual meeting, Electron Microscopy Society of America 53 (August 13, 1995): 626–27. http://dx.doi.org/10.1017/s0424820100139500.

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A low-loss electron (LLE) detector has been installed with a redesigned specimen stage in a Hitachi S800 field-emission SEM (Fig. 1). This has been evaluated by comparing secondary electron (SE) and LLE images of abrasive striations known as “microwear” on an uncoated human incisor mounted at 45° to the beam (Fig. 2).Microwear features typically appear as long linear scratches or discrete pits in the range 0.2 μm to 2.0 μm in width. These reflect both the specific contacts that one tooth makes against another when chewing (jaw movements and tooth wearing patterns) and the food eaten (seed, pla

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Zhou, Ming, Hai Feng Yang, Li Peng Liu, and Lan Cai. "Fabrication of Three-Dimensional Micro-Structures with Two-Photon Absorption by Femtosecond Laser." Materials Science Forum 532-533 (December 2006): 568–71. http://dx.doi.org/10.4028/www.scientific.net/msf.532-533.568.

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The photo-polymerization induced by Two-Photon Absorption (TPA) is tightly confined in the focus because the efficiency of TPA is proportional to the square of intensity. Three-dimensional (3D) micro-fabrication can be achieved by controlling the movement of the focus. Based on this theory, a system for 3D-micro-fabrication with femtosecond laser is proposed. The system consists of a laser system, a microscope system, a real-time detection system and a 3D-movement system, etc. The precision of micro-machining reaches a level down to 700nm linewidth. The line width was inversely proportional to

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