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Journal articles on the topic 'Non uniformity factor'

Author: Grafiati

Published: 3 June 2025

Last updated: 19 July 2025

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1

Shanmugam, Mathiyazhagan, and Lakshmi Sirisha Maganti. "Evaluation of Heat Flux Distribution Characteristics of a Concentrated Solar Dish Collector with different geometric indices." IOP Conference Series: Earth and Environmental Science 1100, no. 1 (2022): 012001. http://dx.doi.org/10.1088/1755-1315/1100/1/012001.

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Abstract The concentrated solar dish collector is a promising technology for generating both electricity and thermal energy together and it is termed as concentrated photovoltaic thermal. The important component of the parabolic dish collector is the absorber; where all concentrated lights are falling. The present paper has investigated the heat flux distribution characteristics of the flat plate absorber based solar dish collector by using the ray-tracing simulations. In concentrating dish collector, rim angle and dish diameter are significant factor of the flux distributions. The present stu

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Qu, Shou Ping, Tian Zhu Liang, and Zhong Shu Zhang. "Research of GaAs Polishing Uniformity on Non-Abrasive Cryogenic Conditions." Advanced Materials Research 291-294 (July 2011): 150–54. http://dx.doi.org/10.4028/www.scientific.net/amr.291-294.150.

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In the paper, it is introduced a new method of non-abrasive cryogenic polishing which is used to polish GaAs chips. It is also analyzed the influence of different factors on polishing surfaces and polishing uniformity. The rotate speed of work piece disk is a more important factor on impacting the polishing uniformity than offset e.

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Xue, Ji Jun, and Peng Wang. "Influence by Casing Geometric Imperfection on Anti-Collapse Strength with Finite Element Calculation." Applied Mechanics and Materials 268-270 (December 2012): 1114–18. http://dx.doi.org/10.4028/www.scientific.net/amm.268-270.1114.

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This essay was to build a finite element model to find the influence by oil casing geometric imperfection on anti-collapse strength. Two types of oil casing, Ф177.8×10.36mm/P110 andФ127×9.19mm/ P110, was taken for the calculation, considering the influence on anti-collapse strength by casing with two elements separately, ovality and non-uniformity of wall thickness. The calculation show that the anti-collapse strength of perfect casing perform better than that of imperfect casing. Ovality is an important factor for the anti-collapse strength, and the anti-collapse strength decrease rapidly as

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Rahimi-Esbo, Mazaher, Ahmad Rezaei Sangtabi, and Ebrahim Alizadeh. "Manifold Design in a PEM Fuel Cell Stack to Improve Flow Distribution Uniformity." Sustainability 14, no. 23 (2022): 15702. http://dx.doi.org/10.3390/su142315702.

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In this paper, a numerical study was performed to investigate the flow distribution in a 52-cell proton exchange membrane (PEM) fuel cell stack. The non-uniformity factor and standard deviation parameters were used to determine the flow distribution uniformity. Flow channels of each bipolar plate were replaced with straight parallel channels filled with porous media to reduce computational costs. The effect of external and integrated humidifiers on the gas distribution among the channels was investigated. Using integrated humidifiers improved the non-uniformity factor and standard deviation by

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Wu, Bing, Chengyu Liu, Rui Xu, et al. "A Target-Based Non-Uniformity Self-Correction Method for Infrared Push-Broom Hyperspectral Sensors." Remote Sensing 15, no. 5 (2023): 1186. http://dx.doi.org/10.3390/rs15051186.

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Non-uniformity in the response of spectral image elements is an inevitable phenomenon in hyperspectral imaging, which mainly manifests itself as the presence of band noise in the acquired hyperspectral data. This problem is prominent in the infrared band owing to the detector material, operating environment, and other factors. Non-uniformity is an important factor that can affect the quality of the hyperspectral data, which has a serious impact on both data analysis and applications and requires corrections via technical means wherever possible. This paper proposes a novel target-based non-uni

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Dolipski, Marian, Eryk Remiorz, and Piotr Sobota. "DYNAMICS OF NON-UNIFORMITY LOADS OF AFC DRIVES." Archives of Mining Sciences 59, no. 1 (2014): 155–68. http://dx.doi.org/10.2478/amsc-2014-0011.

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Abstract The length of armoured face conveyors currently used in hard coal mines most often ranges between 200 m and 300 m. The machines are equipped with a main and auxiliary drive. Asynchronous motors mounted in conveyor drives feature the capacity of several hundreds of kilowatts. The non-uniform distribution of loads onto individual drives is observed in practice. The numerical value of loads distribution onto the individual armoured face conveyor drives is represented by a drive load distribution factor. It is defined as a ratio between the load of an electric motor installed in a given d

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Bahrurridha, Faisal, Puji Hartoyo Suherman, and Desty Anggita Tunggadewi Anggita Tunggadewi. "PERBANDINGAN KUALITAS CITRA PADA SOFWARE ASiR-V DAN NON ASiR-V DENGAN MENGGUNAKAN CT-SCAN GE." JURNAL PEMBELAJARAN FISIKA 11, no. 1 (2022): 1. http://dx.doi.org/10.19184/jpf.v11i1.30358.

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Abdominal MSCT examination generally uses a high exposure factor because the abdomen is a thick part of the body so it requires a high exposure factor. Adaptive Statistical Iterative Reconstruction (ASIR) is an IR-based reconstruction algorithm that can optimize image quality even though it uses a low exposure factor so that the radiation dose produced is also low. GE Healthcare offers Adaptive Statistical Iterative Reconstruction (ASIR) and introduces ASIR-V as the next generation in , the authors compare the image quality using ASiR-V and non ASiR-V software produced by comparing CT-number,

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Yao, Qing Hua, and Miao Cao. "Illumination Uniformity Measurement Technology Research Based on Quasi-Sine Particle Swarm Optimization." Advanced Materials Research 951 (May 2014): 265–68. http://dx.doi.org/10.4028/www.scientific.net/amr.951.265.

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Illumination uniformity measurement technology of target is a main factor that influences the instruments’ function assessing and ballistic test. Non-linear optimizing strategy of illumination uniformity is introduced in this paper, and the method is put forward to improve illumination uniformity based on Quasi-sine Particle Swarm Optimization. This paper describes the basic principle and implementation steps of the algorithm. The objective function and the degree of orientation function are given. The objective function of optimization results show that the algorithm is convergent and the ove

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Du, Zhe, Liyuan Zhang, Xinping Li, Xin Jin, and Fan Yu. "Optimizing Efficiency of Tea Harvester Leaf-Collection Pipeline: Numerical Simulation and Experimental Validation." Agriculture 14, no. 5 (2024): 653. http://dx.doi.org/10.3390/agriculture14050653.

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To address the challenges of missed and disorderly picking in tea harvesters, this study focused on the leaf-collection pipeline and utilized Fluent simulation 19.0 software. A single-factor test identified key parameters affecting airflow velocity. An orthogonal test evaluated the main pipe taper, number of branch pipes, and branch pipe outlet diameter, with average outlet wind speed and wind speed non-uniformity as indicators. The optimal parameters were a main pipe taper of 25.5 mm, 10 branch pipes, and an inner diameter of 17.10 mm for the outlet, resulting in 10.73 m/s average wind speed

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Zhou, Yuan-Kai, Liang-Jhe Jian, and Guo-Dung John Su. "Red-Green-Blue Mini-LEDs Lighting Design with High Uniformity under Thin Form Factor." Crystals 12, no. 12 (2022): 1815. http://dx.doi.org/10.3390/cryst12121815.

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We present a design of a non-imaging system based on a ray-tracing methodology. This system is mainly made of polycarbonate, while part of its surface is coated with metal. The Zemax® optical simulation tool was used to calculate the optimal parameters of this system, such as heights, widths, and angles. This design aims to improve the light distribution uniformity of blended red-green-blue mini light-emitting diodes. Our simulation results show that this design can achieve 93% light distribution uniformity in a 36 mm × 36 mm area, and the height of this design is less than 5 mm.

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Ota, A., M. Aitkulov, D. Dyussambayev, et al. "STUDY OF THE AXIAL NEUTRON FLUX DISTRIBUTION IN THE IRRADIATION DEVICE WITH A CADMIUM-SCREEN." NNC RK Bulletin 1, no. 4 (2019): 34–37. http://dx.doi.org/10.52676/1729-7885-2019-4-34-37.

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Non-uniform distribution (both vertical and radial) of the neutron field in the reactor core of the research reactors is one of the most important task to solve in the process of neutron-transmutation doping of semiconductors. Since 2017, using the critical facility, the Institute of Nuclear Physics (Republic of Kazakhstan), in cooperation with с Chiyoda Technol Corporation (Japan), has been developing an irradiation device for the maximally reduce axial non-uniformity factor of the thermal neutron flux. The developed device allows to reduce the axial non-uniformity factor from 18% to 4%. The

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Zhou, Wu, Fei Li, Huijun Yu, et al. "Influence of adhesive non-uniformity on zero offset of micro accelerometer." International Journal of Modern Physics B 31, no. 31 (2017): 1750242. http://dx.doi.org/10.1142/s0217979217502423.

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Adhesive attaching is a common method used in the packaging of high accurate MEMS devices. A full understanding of the effects of adhesive on device performance, therefore, plays a significant role in MEMS design because the thermal stress formed in packaging process highly depends on the shape, size, amount, properties and layout of the die attach adhesive. This paper investigates intensively the influence of adhesive nonuniformity in the sensitive direction of microaccelerometers on the distribution of thermal stress during the variation of environment temperature. The thermal stress will in

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A.M., Gorelov. "Tellurus fields as ecological factor." Plant Introduction 19 (September 1, 2003): 137–42. https://doi.org/10.5281/zenodo.3253260.

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The telluric (earth) radiance is considered as a special case of geophysical radiance. The non-uniformity of its allocation on the earth surface frames local fields with the expressed biological effect. The classification and same characteristics of such zones are given, factors which produce them, are indicated. An influence of Hartman's frame on morphometric parameters of some species of woody plants are considered as an example. The tact of influence of telluric fields on health and mental sphere of the man is stated. The problem on necessity of wider learning of this ecological factor

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Lyapin, Anton, and Valery Lyapin. "Wastewater diffusive dilution and sedimentation of the fine contaminated particles for nonuniform flow in open channels." MATEC Web of Conferences 144 (2018): 01023. http://dx.doi.org/10.1051/matecconf/201814401023.

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The influence of non-uniformity on mass transfer processes in open channels have been investigated under the action of urbanization factors. The study is related to the urgent problem of environmental degradation of water objects in urbanized areas. It is known that the water quality in the water objects depends on the manner in which the contaminants spread how they mix with the river water and diluted by it. The main results of the study consist of recommendations to incorporate non-uniformity factor to the calculation of diffusion dilution of wastewater and prediction of river processes. So

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15

Loveikin, Viacheslav, Kostiantyn Pochka, Mykola Prystailo, Maksym Balaka, and Olha Pochka. "Impact of cranks displacement angle on the motion non-uniformity of roller forming unit with energy-balanced drive." Strength of Materials and Theory of Structures, no. 106 (May 24, 2021): 141–55. http://dx.doi.org/10.32347/2410-2547.2021.106.141-155.

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The impact of the cranks displacement angle on the motion non-uniformity is determined for three forming trolleys of a roller forming unit with an energy-balanced drive mechanism. At the same time, the specified unit is presented by a dynamic model with one freedom degree, where the extended coordinate is taken as the angular coordinate of the crank rotation. For such a model, a differential equation of motion is written, for solved which a numerical method was used. The inertia reduced moment of the whole unit, and the resistance forces moment, reduced to the crank rotation axis, to move of f

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Panwar, Anuraj, Chang-Mo Ryu, and Ashok Kumar. "Effect of plasma channel non-uniformity on resonant third harmonic generation." Laser and Particle Beams 31, no. 3 (2013): 531–37. http://dx.doi.org/10.1017/s0263034613000311.

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AbstractWe study the generation of resonant third harmonic laser radiation in a density non-uniform rippled plasma channel. An introduction of plasma channel non-uniformity strongly enhances the self-focusing and compression of main laser pulse at lower powers. In a deeper plasma channel, self-focusing is less sensitive to laser amplitude variation but increases compression. Plasma density ripple ‘nq’ leading to resonant third harmonic generation when kq = 4ω2p/3meω0cγ0, where ‘ω’p is electron plasma frequency, ‘ω0’ is laser frequency, and ‘γ0’ is the electron Lorentz factor. Third harmonic is

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17

Kolisnyk, Kostiantyn, and Vitalii Chukhlib. "Enhancing the Energy Efficiency of the Combined Forging Operations of Upsetting and Drawing out." Problems of the Regional Energetics, no. 2(66) (May 2025): 155–67. https://doi.org/10.52254/1857-0070.2025.2-66-13.

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The study investigates the influence of upsetting and drawing out forging parameters on the quality of hook forging and the energy efficiency of these processes. The quality indicators of forged hooks include uneven strain distribution, which leads to a non-uniform distribution of the mechanical properties of the product. The forging technology of hooks was analyzed, and it was determined that the main technological forging operations causing uneven deformation distribution are the sequential upsetting and drawing out processes. Since the influence of specific parameters of these operations re

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18

Yuan, Shiyi, Chengsi Lian, Yiheng Qi, Heng Wei, Han Yan, and Peng Li. "Molecular dynamics simulation of the effect of temperature inhomogeneity on the growth of GaAs thin films." Journal of Physics: Conference Series 2954, no. 1 (2025): 012075. https://doi.org/10.1088/1742-6596/2954/1/012075.

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Abstract GaAs, as an excellent semiconductor material, have a wide range of applications. Numerous studies focus on the preparation of GaAs, yet they often overlook the critical aspect of thin film growth under conditions of temperature non-uniformity. Investigating this factor is essential for understanding the thin film growth process comprehensively. Consequently, this study utilizes the molecular dynamics technique to simulate the growth of GaAs in non-uniform temperature environments. The variations in temperature are categorized into three types: continual temperature increase, central h

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19

AM, Chaerul Qalbi, and Joon Ahn. "Designing a Turning Guide Vane Using CFD for an Economizer of a Non-Furnace Boiler." Processes 11, no. 6 (2023): 1617. http://dx.doi.org/10.3390/pr11061617.

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Non-furnace boilers can improve the efficiency of industrial once-through boilers. However, temperature non-uniformity occurs in the economizer connected vertically to the boiler. Heat transfer performance is degraded by temperature non-uniformity. To solve this problem, a corbel was installed on the side wall of the economizer, and a baffle was installed on the transition duct. Consequently, although the thermal efficiency of the boiler was improved, significant temperature non-uniformity was still observed in the area upstream of the economizer. To address this issue, this study designed a t

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Ren, Jinbo, Chongcheng Chen, Difa Bao, Xinhui Wu, and Shuhe Zheng. "Simulation Analysis and Optimization Design of Paddy Field Mud Spreader Blades for Uniform Dispersion." Agriculture 14, no. 3 (2024): 344. http://dx.doi.org/10.3390/agriculture14030344.

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To improve the distribution of mud particles collected in the tray during the operation of paddy field mud spreader blades, the optimal combination of parameters for the blades that results in the best uniformity of mud dispersion needs to be identified. In this study, a thorough force analysis was conducted on the spreading process, and computational equations were formulated to describe the motion of mud particles. By utilizing the discrete element simulation technique, a simulation model was developed to accurately represent the intricate interaction between the blades and mud particles. Th

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21

Huang, Man, Shi Gui Du, Zhan You Luo, and Xiao Ying Zhang. "Study on the Influencing Factors of Sampling Representativeness of Rock Joints." Applied Mechanics and Materials 170-173 (May 2012): 1301–5. http://dx.doi.org/10.4028/www.scientific.net/amm.170-173.1301.

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The non-uniformity feature of rock joints’ surface profiles is the main influencing factor of the sampling representativeness. In order to analyze the sampling representativeness of rock joints statistically, the joint roughness coefficient (JRC) of 18 pieces of natural slate rock structural plane samples with size from 100mm to 1000mm were measured. The results show that it is necessary to evaluate the representativeness of rock joints in engineering practice due to the large non-uniformity of JRC. The total variation of JRC for different measurement sections, sizes and samples indicates that

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Liu, Chai, Liuyang Shen, Huiran Liu, et al. "Improvement of Temperature Distribution Uniformity of Ready-to-Eat Rice during Microwave Reheating via Optimizing Packaging Structure." Foods 12, no. 15 (2023): 2938. http://dx.doi.org/10.3390/foods12152938.

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The taste quality of ready-to-eat rice is influenced by the uniformity of temperature distribution during microwave reheating. The temperature distribution uniformity of ready-to-eat rice loaded in a rectangular lunch box is investigated under microwave reheating. The results show that with a 10–80 °C temperature increase in the ready-to-eat rice, the thermal conductivity increases, dielectric constant, and specific heat increase and then decrease, while the dielectric loss factor decreases and then slightly increases. The microwave-heating process of ready-to-eat rice exhibits a clear ‘corner

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23

Fan, Jinping, Yuqian Li, Chao Chen, Xin Ouyang, Tianyang Wang, and Wanming Lin. "Effect of Uniform and Non-Uniform Increasing Casting Flow Rate on Dispersion and Outflow Percentage of Tracers in Four Strand Tundishes under Strand Blockage Conditions." Metals 12, no. 6 (2022): 1016. http://dx.doi.org/10.3390/met12061016.

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The flow field, tracer dispersion and uniformity of strands in two designs of four-strand tun-dishes under normal conditions and single-strand blockage conditions are studied by numerical simulation. The casting speed (flow rate) of strands are increasing uniformly or non-uniformly to improve the strand blockage condition. The uniformity of strands of the cases are evaluated by a novel outflow percentage analysis method. The results show that the flow field in the tundish does not change significantly when the single-strand is blocked or the casting flow rate is increased. After blockage of on

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Gou, Jun, Hui Ling Tai, Jun Wang, De En Gu, Xiong Bang Wei, and Ya Dong Jiang. "Study on Reactive Ion Etching of Vanadium Oxide Thin Film by Taguchi Method." Advanced Materials Research 909 (March 2014): 91–94. http://dx.doi.org/10.4028/www.scientific.net/amr.909.91.

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A high selectivity patterning technology of vanadium oxide (VOx) thin film was suggested in this paper. VOxthin film was etched through a photoresist (PR) mask using Cl/N based gases in a reactive ion etching (RIE) system. Taguchi method was used for process design to identify factors that influence the patterning and find optimum process parameters. Experimental results suggested that RF power was the largest contribution factor for VOxetch rate, PR selectivity and uniformity on 6 inch diameter wafer. Uniformity and PR selectivity were improved by introducing a small amount of N2. High resolu

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Amirah Mohamad Sahar, Mohamad Shaiful Ashrul Ishak, Jan Wissink, Mohamed M. Mahmoud, and Tassos G. Karayiannis. "Flow Distribution in Parallel Rectangular Multi Microchannels in Single Phase." CFD Letters 15, no. 1 (2023): 67–75. http://dx.doi.org/10.37934/cfdl.15.1.6775.

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This study proposed newly designed inlet manifolds to manage non-uniformity in parallel multi microchannel heat sink by introducing edges with a curved shape were introduced in order to reduce flow-recirculation at the sharp edges. This resulted in a better flow distribution in the parallel channels. A comprehensible numerical study has been performed using ANSYS-Fluent and a three-dimensional computational domain, incorporating the effect of conjugated heat transfer, was employed in this study. R134a was used as the working fluid and copper was selected as the heat sink material. The dimensio

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Khurana, Aman, P. V. Ram Kumar, and R. S. Mishra. "Performance Analysis of PV Cell under Uniform and Non-Uniform Illumination." International Journal of Advance Research and Innovation 5, no. 2 (2017): 224–26. http://dx.doi.org/10.51976/ijari.521737.

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The electrical behavior i.e. short circuit current and open circuit voltage is observed. The effects of different temperature and insolation on I-V and P-V curve are studied considering uniform illumination. The study shows that short circuit current and open circuit voltage increases with increase in the insulation. By multiplying these two powers curve is drawn. As the cell’s working temperature increases short circuit current increases and open circuit voltage decreases and accordingly the power is obtained. Then the effect of non-uniform illumination on PV cell with variable shape factor i

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27

Montes, Francisco, and Ramón Sala. "Equilibrio competitivo en Liga española de futbol de Primera División: Un test de Montecarlo basado en datos funcionales." Studies of Applied Economics 30, no. 2 (2020): 513. http://dx.doi.org/10.25115/eea.v30i2.3538.

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The supremacy of a few teams over the other participants is a common factor in the major European football leagues. The Spanish First Division league is not an exception. In order to demonstrate this fact, functional data analysis is used to analyze football league classifications for last ten seasons, 2002-03 to 2011-12. Not only the use of these techniques distinguish this work from similar, another distinctive feature is the use of a non-uniform probability distribution on the three possible outcomes of a match, obtained from the results of the 3800 matches of the 10 seasons taking into acc

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Echizenya, Kazuhiko, Naoki Noda, and Hisato Noro. "Characterization of Mn-doped PIN-PMN-PT Single Crystal Grown by Continuous-Feeding Bridgman Method." Crystals 12, no. 9 (2022): 1183. http://dx.doi.org/10.3390/cryst12091183.

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Mn-doped Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 (Mn:PIN-PMN-PT) single crystals are attractive piezoelectric materials owing to their high mechanical quality factor. However, the single crystal boules grown by the conventional Bridgman method show compositional variation along the growth direction. In particular, the Mn content exhibits large variation due to its severe segregation. To improve the compositional uniformity, we applied the continuous-feeding Bridgman method to the growth of a Mn:PIN-PMN-PT single crystal boule. Then, the composition and property distributions of the boule alon

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Kalinin, A. A., A. A. Kondratiev, I. O. Zharov, I. A. Kozlov, and P. N. Astakhov. "Development of a "white" noise generator in the microwave range in a hybrid integrated design." Bulletin of Russian academy of natural sciences 23, no. 1 (2023): 48–54. http://dx.doi.org/10.52531/1682-1696-2023-23-1-48-54.

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The article considers a technique for developing white noise generators, which makes it possible to design “quasi-white” noise generators in the operating frequency range of C and X noise diodes with a minimum non-uniformity of the noise power spectral density and the maximum possible excess noise factor operating in a wide temperature range.

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Dorfi, H. R. "Tire Non-Uniformities And Steering Wheel Vibrations." Tire Science and Technology 33, no. 2 (2005): 64–102. http://dx.doi.org/10.2346/1.2186787.

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Abstract Steering wheel vibrations are frequently related to non-uniformities of the tire/wheel system. While steering system design is a major factor in the sensitivity of the vehicle, the excitation of steering wheel vibrations is due in general to non-uniformities of the tire/wheel system. However, tire non-uniformities are to some extent unavoidable and result in rolling force variation at the spindle during steady state rolling. Therefore, limiting and managing these non-uniformities is of great economic importance to tire manufacturers. The present work demonstrates the tire's role in ge

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Conceição, R., L. Gibilisco, M. Pimenta, and B. Tomé. "Gamma/hadron discrimination at high energies through the azimuthal fluctuations of air shower particle distributions at the ground." Journal of Cosmology and Astroparticle Physics 2022, no. 10 (2022): 086. http://dx.doi.org/10.1088/1475-7516/2022/10/086.

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Abstract Wide field-of-view gamma-ray observatories must fight the overwhelming cosmic ray background to identify very-high-energy astrophysical gamma-ray events. This work introduces a novel gamma/hadron discriminating variable, LCm, which quantifies the azimuthal non-uniformity of the particle distributions at the ground. This non-uniformity, due to the presence of hadronic sub-showers, is higher in proton-induced showers than in gamma showers. The discrimination power of this new variable is then discussed, as a function of the air shower array fill factor, in the energy range 10TeV to 1PeV

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Zhang, Xiao Na, and Ming Xiao Jia. "Non-Destructive Inspection Method and Application Research of Steel Corrosion in Concrete Structures." Applied Mechanics and Materials 438-439 (October 2013): 497–500. http://dx.doi.org/10.4028/www.scientific.net/amm.438-439.497.

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In the reinforced concrete structure, steel corrosion is a major factor affecting the durability of existing structures, it is necessary to explore the extent of steel corrosion in order to take the necessary measures. Based on non-damaged concrete components or structures, by measuring the performance of concrete-related physical quantities, non-destructive inspection could presume strength, compactness, uniformity and defects of concrete components or structure. Combined with engineering example, non-destructive inspection technique and its application in the degree of steel corrosions inspe

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Jiang, Can, Jun Yang, and Mingwu Fan. "Application of Particle Swarm Optimization in the Design of an ICT High-Voltage Power Supply with Dummy Primary Winding." Electronics 10, no. 15 (2021): 1866. http://dx.doi.org/10.3390/electronics10151866.

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The distribution of disk output voltage is a key factor for the design of an insulated core transformer (ICT) high-voltage power supply. The development of an ICT involves the design and optimization of many parameters, which greatly affect the uniformity of disk output voltage. A new ICT structure with dummy primary windings can compensate for the disk output voltage, which aims to improve uniformity. In this work, an optimization method based on a particle swarm optimization (PSO) algorithm was used to optimize the design parameters of an ICT with dummy primary windings. It achieved an optim

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Patel, NarayanPrasad, V. Vijayan, and Bishnu Majumdar. "The non-uniformity correction factor for the cylindrical ionization chambers in dosimetry of an HDR192Ir brachytherapy source." Journal of Medical Physics 31, no. 2 (2006): 83. http://dx.doi.org/10.4103/0971-6203.26893.

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Huang, Tzu-Jung, Adheesh Ankolekar, Anibal Pacheco-Sanchez, and Ivan Puchades. "Investigating the Device Performance Variation of a Buried Locally Gated Al/Al2O3 Graphene Field-Effect Transistor Process." Applied Sciences 13, no. 12 (2023): 7201. http://dx.doi.org/10.3390/app13127201.

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In this study, a process is developed for the fabrication of buried top-gated graphene transistors with Al2O3 as a gate dielectric, yielding devices that can be suitable for not only flexible electronics but also laser-induced graphene (LIG)-based technology implementations. A new processing option is presented with the use of tetraethyl-orthosilicate (TEOS) as an etch stop for contact via etching of Al2O3. Buried locally gated Al/Al2O3 graphene field-effect transistors (GFETs) are fabricated with Dirac points as low as 4 V, with a metal-to-graphene contact resistance as low as ∼1.7 kΩ·µm, and

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Andrade, Luiz Antonio de, João Carlos Cury Saad, Bruno Marcos Nunes Cosmo, João Victor Costa, and Willian Aparecido Leoti Zanetti. "Effect of allowable flow-rate variation and local head loss on maximum length of non-pressure compensated drip tape." Ambiente e Agua - An Interdisciplinary Journal of Applied Science 16, no. 2 (2021): 1. http://dx.doi.org/10.4136/ambi-agua.2676.

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A challenge for the design of drip irrigation systems with non-pressure compensated emitters is to increase the maximum length of the lateral lines without significantly reducing water application uniformity. This work evaluated the effect of the flow-rate variation and the local head loss in the maximum length of drip tape with a non-pressure compensated flat emitter. The tests were carried out in a laboratory, using a collapsible drip tape non-pressure compensated in three 50-meter segments. The production line was configured to generate drip tapes without insertion of emitters and with clos

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Okhravi, Saeid, and Saeed Gohari. "Form friction factor of armored riverbeds." Canadian Journal of Civil Engineering 47, no. 11 (2020): 1238–48. http://dx.doi.org/10.1139/cjce-2019-0103.

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Resistance to flow because of the presence of bed forms over armored riverbeds is of paramount importance, leading to the effective design of water-resources-related projects. Based on the findings over bed armored surfaces, it is shown that the controlling roughness (ks) can be taken as equal to the median diameter of the armor layer. Analytical methodologies for total and grain friction factors have been proposed here that take flow non-uniformity into account using the velocity distribution and friction slope. The percentage composition of form friction factor in the total friction factor w

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Ozoani, Joy, and Yuri Volkov. "Enhancing the efficiency of the MOX fuel cycle for VVER-1200 using burnable absorbers." Nuclear Energy and Technology 9, no. (4) (2023): 227–32. https://doi.org/10.3897/nucet.9.98689.

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Margin adoption in a nuclear power plant (NPP) design is a frequent approach to strengthen the design's robustness and provide an efficient way to handle uncertainties. However, the current trend of increasing fuel enrichment, including the use of MOX fuel to achieve a higher burnup, leads to non-uniformity in the energy release (power peaking factor) at the level of the fuel rod lattice, thereby causing a great effect on the reactor margins. One of the ways to reduce the power peaking factor is the use of burnable absorbers (BAs) which helps to minimize the power peaking factor. This work aim

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Nikolaeva, Olga V. "On Variants of the Main Atmospheric Correction Formula." Light & Engineering, no. 04-2020 (August 2020): 39–46. http://dx.doi.org/10.33383/2019-061.

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The article studies the accuracy of the main formula of atmospheric correction allowing us to determine albedo of a underlying (earth) surface based on radiance factor of solar light reflected by the system of atmosphere and underlying surface. The problem of atmospheric correction is considered in three-dimensional geometry with spatial non-uniformity of the underlying surface taken into account. It is demonstrated that the accuracy of albedo recovery depends on the used variant of the main formula.

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Gribelyuk, Michael A., Sanjay Mehta, Jeffrey B. Johnson, and Lee Kimball. "Two-dimensional dopant potential mapping in a fin field effect transistor by off-axis electron holography." Journal of Applied Physics 132, no. 4 (2022): 045702. http://dx.doi.org/10.1063/5.0091586.

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Progress in the development of nanometer scaled Fin Field Effect Transistor (FinFET) devices is affected by a lack of understanding of relevant dopant diffusion phenomena due to limited experimental data. In particular, 2D dopant potential mapping by electron holography in 3D FinFET devices has been challenged by the overlap of electrically active fins, metal films, and dielectric films in the electron beam direction. This paper presents methodology on how to map dopant potential in modern FinFET devices. A custom-device structure was developed, which preserved all essential features of the de

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J. Mohammed, Hassan. "Measurements of Corona Discharge in Sharp –to-Plane Electrodes Configuration." DJES 11, no. 3 (2018): 79–84. http://dx.doi.org/10.24237/djes.2018.11312.

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A Dc positive sharp- to –plane Corona phenomena have been studied in electronegative gases (air ,and SF6 ) for pressure up to (3.2bar and gap length from 0.1 to 0.5 cm), with high degree of non-uniformity electric field. The corona –breakdown phases can exhibit anomalous characteristics. The exact physical process of such phenomena is not yet fully understood complete. To better understand this process precise knowledge about corona and spark discharge is necessary. Hence the dependency of corona inception and spark breakdown voltage on the pressure, non-uniformity field factor and the type of

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Chennu, Ranganayakulu. "Numerical analysis of compact plate-fin heat exchangers for aerospace applications." International Journal of Numerical Methods for Heat & Fluid Flow 28, no. 2 (2018): 395–412. http://dx.doi.org/10.1108/hff-08-2016-0313.

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Purpose The purpose of this study is to find the thermo-hydraulic performances of compact heat exchangers (CHE’s), which are strongly depending upon the prediction of performance of various types of heat transfer surfaces such as offset strip fins, wavy fins, rectangular fins, triangular fins, triangular and rectangular perforated fins in terms of Colburn “j” and Fanning friction “f” factors. Design/methodology/approach Numerical methods play a major role for analysis of compact plate-fin heat exchangers, which are cost-effective and fast. This paper presents the on-going research and work car

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Johnson, W. Carroll, and Jerry W. Davis. "Effects of Peanut Stand Uniformity and Herbicide Regime on Weed Management and Yield." Peanut Science 43, no. 2 (2016): 141–47. http://dx.doi.org/10.3146/ps15-14.1.

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ABSTRACT Crop stand directly affects ability of any crop to compete with weeds. To capture this form of cultural weed control, final crop stands need to be uniform. Peanut stands are frequently non-uniform, despite the use of precision vacuum planters. Trials were conducted from 2009 through 2011 in Tifton, GA to determine the effect of non-uniform peanut stands on weed control, grade, and marketable peanut yield. Non-uniform peanut stands were established by modifying vacuum planter discs that created skips 18 cm wide and 36 cm wide at regular intervals and compared with peanut at a uniform s

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Ozoani, Joy, and Yuri Volkov. "Enhancing the efficiency of the MOX fuel cycle for VVER-1200 using burnable absorbers." Nuclear Energy and Technology 9, no. 4 (2023): 227–32. http://dx.doi.org/10.3897/nucet.9.98689.

Full text

Abstract:

Margin adoption in a nuclear power plant (NPP) design is a frequent approach to strengthen the design’s robustness and provide an efficient way to handle uncertainties. However, the current trend of increasing fuel enrichment, including the use of MOX fuel to achieve a higher burnup, leads to non-uniformity in the energy release (power peaking factor) at the level of the fuel rod lattice, thereby causing a great effect on the reactor margins. One of the ways to reduce the power peaking factor is the use of burnable absorbers (BAs) which helps to minimize the power peaking factor. This work aim

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Zuheir, Osman Alaa Elmardi Osman Aminah M. Abedelghayoum. "COMPARATIVE EVALUATION OF PHYSICOCHEMICAL PROPERTIES OF SOME COMMERCIALLY AVAILABLE BRANDS OF METFORMIN HCL TABLETS MARKETED IN SUDAN." INDO AMERICAN JOURNAL OF PHARMACEUTICAL RESEARCH 07, no. 01 (2017): 7471–77. https://doi.org/10.5281/zenodo.1007055.

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The pharmaceutical equivalence of five different brands of metformin hydrochloride 500 mg tablets available in the Sudanese market was evaluated using a number of official and non-official pharmacopoeial tests; which included determination of assay of content, evaluation of uniformity of weight, friability, hardness, thickness, disintegration time and dissolution tests. The dissolution profiles of the generic brands and innovator were studies and compared using similarity factor f2 and difference factor f1. The results showed that all the five tested brands complied with the requirements of we

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Hosseini, Morteza Darvish Morshedi, Miroslav Goljan, and Hui Zeng. "Semi-Blind Image Resampling Factor Estimation for PRNU Computation." Electronic Imaging 2020, no. 4 (2020): 77–1. http://dx.doi.org/10.2352/issn.2470-1173.2020.4.mwsf-077.

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Camera sensor fingerprints for digital camera forensics are formed by Photo-Response Non-Uniformity (PRNU), or more precisely, by estimating PRNU from a set of images taken with a camera. These images must be aligned with each other to establish sensor location pixel-to-pixel correspondence. If some of these images have been resized and cropped, the transformations need to be reversed. In this work we deal with estimation of resizing factor in the presence of one reference image from the same camera. For this problem we coin the term semi-blind estimation of resizing factor. We post two requir

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Li, Xuetong, Lili Zhang, and Yongliang Zhang. "Numerical Study on the Influence of Different Operating Conditions on Mixing Uniformity of the Helical Gear Pump Mixer." Processes 11, no. 11 (2023): 3223. http://dx.doi.org/10.3390/pr11113223.

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The uniformity of the gelatin solution and water mixing process is a critical factor in the performance of helical gear pump mixers that affects pump efficiency. In this study, we investigate the impact of water inlet velocity and rotational speed on the helical gear pump mixer. A numerical model of the helical gear pump mixer is established using Simerics MP+ 5.2.15 software. By varying the water inlet velocity from 0.159 m/s to 1.272 m/s and the rotational speed from 8 rpm to 50 rpm, we obtained volume fraction distributions of water in different sections of the helical gear pump mixer. The

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Wang, Chuanqing, Jianlu Fu, Qiusheng Zhang, et al. "Optimizing Perforated Duct Systems for Energy-Efficient Ventilation in Semi-Closed Greenhouses Through Process Regulation." Processes 13, no. 7 (2025): 2253. https://doi.org/10.3390/pr13072253.

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Traditional perforated duct designs fail to resolve the energy consumption-uniformity conflict in semi-closed greenhouses. To address this, we develop a CFD-RSM-NSGA-II framework that simultaneously minimizes velocity non-uniformity (CV-v), pressure loss (ΔP), and temperature variation (CV-t). Key parameters—hole diameter (6–10 mm), spacing (30–70 mm), and inlet velocity (4–8 m/s)—are co-optimized. Model validation showed that the mean relative errors were 8.6% for velocity, 2.3% for temperature, and pressure deviations below 5 Pa, with the response surface model achieving an R2 of 0.9831 (p &

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Li, Su Min. "Understanding Effectiveness of Eco Monitoring Networks: Information Theoretical Perspective." Advanced Materials Research 765-767 (September 2013): 2213–19. http://dx.doi.org/10.4028/www.scientific.net/amr.765-767.2213.

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This work studies eco monitoring networks. As eco monitoring networks have been used to monitor large networks, questions arise whether decentralized inference is efficient and whether an eco monitoring network with a moderate size can monitor an underlying network at the Internet scale. This work studies the local effectiveness of decentralized inference done by individual monitors. Information theoretical measures, i.e., conditional non-uniformity factor is applied to quantify the effectiveness. Large-scale data from DShield is used to access the effectiveness of a real eco monitoring networ

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Parvizi, Ali, Karen Abrinia, and Mohsen Hamedi. "An Analytical Approach to Ring Rolling Using Modified Slab Analysis." Advanced Materials Research 383-390 (November 2011): 4634–41. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.4634.

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In this paper, based on the modified slab method theory, an analytical solution for ring rolling process is presented. The non-uniformity of the normal and shear stresses across the section of the deforming material are considered. The friction factor multiplied by the shear yield strength is used to present friction between the main roll and the ring. Complete expressions for the ring rolling pressure, force and torque are obtained and the position of neutral point is predicted. The influence of the process parameters such as friction factor, main roll rotational speed, feed speed, and others

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