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Journal articles on the topic 'Phase angle'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

鷲澤, 尚宏. "Phase Angle." Japanese Journal of SURGICAL METABOLISM and NUTRITION 59, no. 2 (2025): 72–73. https://doi.org/10.11638/jssmn.59.2_72.

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2

Gao, P. X., and J. C. Xu. "Relationship between the Tilt Angles of Sunspot Groups and the Properties of the Next Solar Cycle." Astrophysical Journal 974, no. 2 (2024): 268. http://dx.doi.org/10.3847/1538-4357/ad7118.

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Abstract Based on the data from the Kodaikanal and Mount Wilson observatories, we investigate the relationships of the tilt angles of sunspot groups, including the mean tilt angle and the tilt-angle scatter, during the declining phase with the parameters of the next solar cycle (SC). The main findings are summarized in the following three points. (1) During the declining phase, the correlation between the mean tilt angle and the tilt-angle scatter is statistically insignificant. (2) Six quantities measured during the declining phase show significant anticorrelations with the strength and ampli

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3

Tatchev, Dragomir. "Multiphase approximation for small-angle scattering." Journal of Applied Crystallography 43, no. 1 (2009): 8–11. http://dx.doi.org/10.1107/s0021889809048675.

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The two-phase approximation in small-angle scattering is well known and is still the dominant approach to data analysis. The intensity scattered at small angles is proportional to the second power of the difference between the scattering densities of the two phases. Nevertheless, scattering contrast variation techniques are widely used, and they are obviously suitable for multiphase systems or systems with gradually varying scattering density, since if no parasitic scattering contributions are present the scattering contrast variation would only change a proportionality coefficient. It is show

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S., Narasimha, and Reddy Salkuti Surender. "An improved closed loop hybrid phase shift controller for dual active bridge converter." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 2 (2020): 1169–78. https://doi.org/10.11591/ijece.v10i2.pp1169-1178.

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In this paper, a new closed loop hybrid phase shift control is proposed for dual active bridge (DAB) converter with variable input voltage. The extended phase shift (EPS) control is applied when load gets heavy enough and the secondary side phase shift angle decreases to zero. When this modified DAB converter operates at light loads, the triple phase shift (TPS) modulation method is applied, and the added control freedom is the secondary phase shift angle between the two-secondary side switching legs. The hybrid phase shift control (HPS) scheme is a combination of EPS and TPS modulations, and

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5

Urata, Ryunosuke, Tatsuya Igawa, Shomaru Ito, et al. "Association between the Phase Angle and the Severity of Horizontal Gaze Disorder in Patients with Idiopathic Dropped Head Syndrome: A Cross-Sectional Study." Medicina 59, no. 3 (2023): 526. http://dx.doi.org/10.3390/medicina59030526.

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Background and Objectives: The phase angle, calculated by bioelectrical impedance analysis, can help elucidate the pathology of patients with idiopathic dropped head syndrome (IDHS) and explain the motor dysfunction associated with the horizontal gaze disorder. The aim of this study was to clarify the characteristics of phase angle in IDHS patients and the relationship between the phase angle and the severity of horizontal gaze disorder. Materials and Methods: This cross-sectional study included 43 female patients with IDHS and 69 healthy female volunteers. A multi-frequency segmental body com

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Fischer, I. S., and R. N. Paul. "Kinematic Displacement Analysis of a Double-Cardan-Joint Driveline." Journal of Mechanical Design 113, no. 3 (1991): 263–71. http://dx.doi.org/10.1115/1.2912778.

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The input-output displacement relations of two Cardan joints arranged in series on a driveline has been investigated in detail, including the effects of unequal joint angles, the phase angle between the two Cardan joints and also such manufacturing tolerance errors as nonright angle moving link lengths and offset joint axes. A combined Newton-Raphson method and Davidon-Fletcher-Powell optimization algorithm using dual-number coordinate-transformation matrices was employed to perform the analysis. An experiment was conducted to validate the results of the analysis. The apparatus consisted of a

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Matsuzawa, Yuta, Takasuke Miyazaki, Yasufumi Takeshita, et al. "Effect of Leg Extension Angle on Knee Flexion Angle during Swing Phase in Post-Stroke Gait." Medicina 57, no. 11 (2021): 1222. http://dx.doi.org/10.3390/medicina57111222.

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Background and Objectives: Leg extension angle is important for increasing the propulsion force during gait and is a meaningful indicator for evaluating gait quality in stroke patients. Although leg extension angle during late stance might potentially also affect lower limb kinematics during the swing phase, the relationship between these two remains unclear. This study aimed to investigate the relationship between leg extension angle and knee flexion angle during pre-swing and swing phase in post-stroke gait. Materials and Methods: Twenty-nine stroke patients walked along a 16 m walkway at a

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Mytsenko, I., and O. Roenko. "QUICK-ACTING, CONTROLLABLE PHASE SHIFTER FOR PHASE ANGLE ADJUSTMENT IN RADIO SIGNALS." RADIO PHYSICS AND RADIO ASTRONOMY 27, no. 3 (2022): 213–18. http://dx.doi.org/10.15407/rpra27.03.213.

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Subject and Purpose. The phase shifters intended for controlling the phase of radio signals are widely used in ultra-high frequency technology, communication systems, radar, and a variety of measuring and special-purpose radio equipment. Designers of phased array antennas face the need of providing for broad beam scanning angles and high antenna gains, which leads to the necessity of greatly increasing the number of array elements, each of which is to be controlled by a phase shifter. Therefore, the development and creation of quick-acting phase shifters is an urgent task. The purpose of this

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Rozhkov, V., L. Taran, D. Okun, L. Riadova, and V. Shutieiev. "Influence technique of the take-off phase on the flight phase of the hop in the female triple jump among elite athletes." Scientific Journal of National Pedagogical Dragomanov University. Series 15. Scientific and pedagogical problems of physical culture (physical culture and sports), no. 11(157) (December 1, 2022): 126–29. http://dx.doi.org/10.31392/npu-nc.series15.2022.11(157).29.

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The article discusses relationships between biomechanical parameters techniques take-off phase and flight phase of the hop among the qualified women specializing in triple jump. As a result of correlation analyses was determined that if research women faster put leg on the support, they will have more initial velocity of the total center of mass of the bodies r=0,955, reducing values dilution of the hips during flight phase of the hop r=-0,773, decrease time of flight phase of the hop r=-0,788 and increases long of the hop r=0,793. If athletes spend more time on take-off phase, they will

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10

Ohira, Takashi. "Phase Angle [Enigmas, etc.]." IEEE Microwave Magazine 22, no. 9 (2021): 101–2. http://dx.doi.org/10.1109/mmm.2021.3086379.

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Mitrovi, Zoran. "A phase angle standard." Measurement Science and Technology 15, no. 3 (2004): 559–64. http://dx.doi.org/10.1088/0957-0233/15/3/008.

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Gulin, Jana, Ester Ipavic, Denis Mlakar Mastnak, Erik Brecelj, Ibrahim Edhemovic, and Nada Rotovnik Kozjek. "Phase angle as a prognostic indicator of surgical outcomes in patients with gastrointestinal cancer." Radiology and Oncology 57, no. 4 (2023): 524–29. http://dx.doi.org/10.2478/raon-2023-0060.

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Abstract Background In patients with gastrointestinal cancer with planned elective surgery, malnutrition increases the risk of adverse outcomes in the postoperative period. The phase angle, measured by the bioelectrical impedance analysis is an indicator of the metabolic and functional status of the patient. It may be an important prognostic indicator for the clinical outcome of post-surgical treatment in patients with gastrointestinal cancer. Patients and methods In this prospective study, 70 patients with gastrointestinal cancer had their phase angles measured by the bioelectrical impedance

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Prashant ., Prashant, and Dr Vinita Bajpai Mishra Dr. Vinita Bajpai Mishra. "Relationship of Kinematic Variables with the Performance of uprise on rings in Men’s Artistic Gymnastics." International Journal of Physical Education & Sports Sciences 16, no. 2 (2024): 18–21. http://dx.doi.org/10.29070/tqx84c78.

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An investigationwas done to find the relation between selected kinematic variables and theperformance of uprise on rings in men’s artistic gymnastics.The study was conducted on national-levelgymnasts. The data on angular kinematic variables were collected on four different phases of uprise onrings. Linear kinematic variables were identifiedon two different phases of uprise on rings.The angular kinematic variables did not show any significant relationship at the 0.05 level at theDislocation Phase.Duringthe Vertical Line Cross Phasea significant relationship was found between angle atthe ankle a

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Garvey, Christopher J., Ian H. Parker, Robert B. Knott, and George P. Simon. "Small angle scattering in the Porod region from hydrated paper sheets at varying humidities." Holzforschung 58, no. 5 (2004): 473–79. http://dx.doi.org/10.1515/hf.2004.071.

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Abstract The microscopic changes in the structure of paper at different equilibrium moisture contents were examined using the novel technique of contrast variation small angle neutron scattering (SANS). Contrast variation, by appropriate selection of the H2O:D2O ratio, was used to simplify the scattering from hydrated paper to a two-phase approximation. The two phases were paper polymers (cellulose, lignin and hemicelluloses) and a phase consisting of water and voids. The two-phase approximation is justified by consideration of the chemistry and density of each of the polymer species belonging

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Xi, Zhi Jun, Gang Li, and Li Ming Lu. "Fabrication of Ultrahydrophobic ZnO by Vapor Phase Transport." Advanced Materials Research 282-283 (July 2011): 753–56. http://dx.doi.org/10.4028/www.scientific.net/amr.282-283.753.

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A ultrahydrophobic ZnO film was synthesized on the Si substrates by a novel vapor phase transport method. The surface structural properties of as-synthesized ZnO film was characterized using scanning electron micrograph (SEM). The contact angles and the rolling angles on such films were measured through an optical contact angle meter. Wettability studies revealed the films exhibited a ultrahydrophobic behaviour with a higher contact angle of 166.8°±6.8° and lower rolling angle of less than 2°-a water droplet moved easily on the surface. SEM showed that compared with pure smooth nickel surface,

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Zhang, Haoqiang, Shengjing Tang, Jie Guo, and Wan Zhang. "A Two-Phased Guidance Law for Impact Angle Control with Seeker’s Field-of-View Limit." International Journal of Aerospace Engineering 2018 (2018): 1–13. http://dx.doi.org/10.1155/2018/7403639.

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A two-phased guidance problem with terminal impact angle constraints and seeker’s field-of-view limit is addressed in this paper for a missile against a nonmaneuvering incoming target. From the conventional PN guidance without any constraints, it is found that satisfying the impact angle constraint causes a more curved missile trajectory requiring a large look angle. To avoid the look angle exceeding the seeker’s physical limit, a two-phased look angle control guidance scheme with the terminal constraint is introduced. The PN-typed guidance law is designed for each guidance phase with a specif

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17

White, Darris L., and Walt D. Musial. "The Effect of Load Phase Angle on Wind Turbine Blade Fatigue Damage." Journal of Solar Energy Engineering 126, no. 4 (2004): 1050–59. http://dx.doi.org/10.1115/1.1800533.

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This paper examines the importance of load phase angle variations on fatigue damage and evaluates the potential effects of varying the load phase angle during dual-axis constant amplitude fatigue testing. The scope of this paper is limited to results from simulated wind and dynamic loads. The operating loads on a generic three bladed up-wind 1.5 MW wind turbine blade were analyzed over a range of operating conditions, and an aggregate probability distribution for the actual phase angles between the peak in-plane (lead-lag) and peak out-of-plane (flap) loads was determined. Using a finite eleme

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Lin, Xiao. "Cyclic Deformation Behavior and Dislocation Substructures of Hexagonal Zircaloy-4 Under Out-of-Phase Loading." Journal of Engineering Materials and Technology 122, no. 1 (1999): 42–48. http://dx.doi.org/10.1115/1.482763.

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Macroscopic response and microscopic dislocation structures of Zr-4 subjected to biaxial fatigue under different phase angles of 30°, 60°, 90° and different equivalent strain ranges of 0.8%, 0.6%, 0.4% were studied. The testing results show that the delay angle between the stress deviators and strain increment tensors is strongly dependent on phase angle and the equivalent strain range. When phase angle equals 60°, the delay angle has the minimum variation range for all specimens. The mean value of the delay angle decreases with increasing phase angle or the equivalent strain range. The variat

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19

Pan, Junxing, Jin Sun та Xiao-Gang He. "𝜃23 = π/4 and δ = −π/2 in neutrino mixing, which convention?" International Journal of Modern Physics A 34, № 35 (2019): 1950235. http://dx.doi.org/10.1142/s0217751x1950235x.

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Considerable information has been obtained about neutrino mixing matrix. Present data show that in the particle data group (PDG) parametrization, the 2–3 mixing angle and the CP violating phase are consistent with [Formula: see text] and [Formula: see text], respectively. A lot of efforts have been devoted to constructing models in realizing a mixing matrix with these values. However, the particular angles and phase are parametrization convention dependent. The meaning about the specific values for mixing angle and phase needs to be clarified. Using the well-known nine independent ways of para

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Mu, Xue Jie, Xing Wei Li, and Na Duan. "Dynamic Simulation and Analysis of Different Phase Synchronous Rotor Mixing Process." Key Engineering Materials 561 (July 2013): 279–84. http://dx.doi.org/10.4028/www.scientific.net/kem.561.279.

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Contrast and analysis of the influence that synchronous rotor mixer’s two phase angles 90° and 180° to the mixing effect using special visco-elasticity fluid software--Polyflow. The results show that 90° phase angle rotor could promote compound mixing, and improve mixing rubber’s uniformity, and its mixing effect is better than synchronous rotor with 180° phase angle.

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Zawawi, M. N. M., Z. M. Isa, M. H. Arshad, B. Ismail, and M. H. N. Talib. "Comparative Study of Multiphase 5-Level Cascaded H-Bridge Multilevel Inverter System." Journal of Physics: Conference Series 2312, no. 1 (2022): 012062. http://dx.doi.org/10.1088/1742-6596/2312/1/012062.

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Abstract In terms of cost and structural design, the cascaded H-bridge multilevel inverter (CHBMLI) has a significant advantage over diode clamped and capacitor clamped multilevel inverters. The total harmonic distortion (THD) of a 5-level CHBMLI system for three different phases (single-phase, three-phase, and six-phase system) is studied and compared in this work. As switching angles play a role in lowering THD, the switching angles for a 5-level CHBMLI are evaluated using four specific switching angle methods in the initial section of this paper. In the simulation of single-phase system, th

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Zhu, Yaguang, and Tong Guo. "Galloping Trajectory Generation of a Legged Transport Robot Based on Energy Consumption Optimization." Journal of Robotics 2016 (2016): 1–9. http://dx.doi.org/10.1155/2016/9645730.

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Legged walking robots have very strong operation ability in the complex surface and they are very suitable for transportation of tools, materials, and equipment in unstructured environment. Aiming at the problems of energy consumption of legged transport robot during the fast moving, a method of galloping trajectory planning based on energy consumption optimization is proposed. By establishing transition angle polynomials of flight phase, lift-off phase, and stance phase and constraint condition between each state phase, the locomotion equations of the ellipse trajectory are derived. The trans

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de Parscau, J. "Relationship between phase velocities and polarization in transversely isotropic media." GEOPHYSICS 56, no. 10 (1991): 1578–83. http://dx.doi.org/10.1190/1.1442968.

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Most techniques used to estimate anisotropy from multiple‐source offset VSP data assume angles measured from particle motion as an incidence angle. However, the difference between P‐wave polarization and the propagation direction for an anisotropic medium can be higher than 8 degrees. This difference provides a nonnegligible error in the estimation of anisotropy parameters from phase velocities. An exact model, proposed to describe P‐ and SV‐phase velocity variations for a transversely isotropic medium (TIM), takes into account the polarization angles. This model is a function of two anisotrop

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Visvanathan, N., Z. Meglick, and D. T. Wickramasinghe. "Spectropolarimetry of Comet Halley." International Astronomical Union Colloquium 126 (1991): 245–48. http://dx.doi.org/10.1017/s0252921100066872.

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AbstractSpectropolarimetric observations from 3800 to 7000 Å were obtained for the nucleus of comet Halley for nine nights during 1985-86. The observations were spaced over phase angle of 2 to 66 °. The continuum polarization without molecular-line contamination as well as the polarization of the molecular lines were evaluated. The plot of polarization versus the phase angle shows small negative polarization for angles less than 20°. The highest polarization measured for phase angle ≤ 66° is 19.6% .The lowest polarization of −2.0% has been measured at the phase angle ~ 10°. The variation of po

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Jin, Xu, Xuhu Wang, Yujun Hou, et al. "Robust Sparse Bayesian Two-Dimensional Direction-of-Arrival Estimation with Gain-Phase Errors." Sensors 23, no. 23 (2023): 9422. http://dx.doi.org/10.3390/s23239422.

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To reduce the influence of gain-phase errors and improve the performance of direction-of-arrival (DOA) estimation, a robust sparse Bayesian two-dimensional (2D) DOA estimation method with gain-phase errors is proposed for L-shaped sensor arrays. The proposed method introduces an auxiliary angle to transform the 2D DOA estimation problem into two 1D angle estimation problems. A sparse representation model with gain-phase errors is constructed using the diagonal element vector of the cross-correlation covariance matrix of two submatrices of the L-shaped sensor array. The expectation maximization

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Arakawa, Hiroki, Masamichi Okudaira, Satoru Tanigawa, Hirohiko Maemura, and Takashi Fukuda. "Altered Joint Angle Strategy for Sprinting in Elite Sprinters with Chronic Ankle Instability." Asian Journal of Kinesiology 25, no. 3 (2023): 3–11. http://dx.doi.org/10.15758/ajk.2023.25.3.3.

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OBJECTIVES Individuals with chronic ankle instability (CAI) demonstrated altered not only ankle but also lower extremity joint angle during numerous dynamic movements compared to healthy controls. However, little is known about joint angles during sprinting, which is the most essential movement during explosive sports. We, therefore, investigated the lower extremity joint angle during sprinting between elite sprinters with CAI and healthy controls.METHODS Fourteen male college sprinters participated in this study, seven with CAI and seven healthy controls. Five-second steady speed running was

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Yang, Yazhou, Pei Ma, Le Qiao, et al. "Phase-angle dependence of colour ratios and potential implications for lunar remote sensing." Astronomy & Astrophysics 644 (November 26, 2020): A30. http://dx.doi.org/10.1051/0004-6361/202039385.

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Context. The colour-ratio technique has been widely used in mapping planetary surfaces, but its solar phase-angle dependence is not well understood. Understanding the phase-angle dependence of the colour ratio would enhance our abilities in interpreting planetary remote sensing data. Aims. We aim to investigate the dependence of the colour ratio indices on mineralogy, phase angle, particle size, and the degree of simulated space weathering. Methods. We measured the multi-band (i.e. 458, 633, 750, and 905 nm) and multi-angle reflectance spectra of four typical lunar-type minerals with different

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Chung, Young Jin, Gi Hun Lee, and Hyeon Gyu Beom. "Atomistic Insights into the Phase Transformation of Single-Crystal Silicon during Nanoindentation." Nanomaterials 12, no. 12 (2022): 2071. http://dx.doi.org/10.3390/nano12122071.

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The influence of the indenter angle on the deformation mechanisms of single-crystal Si was analyzed via molecular dynamics simulations of the nanoindentation process. Three different types of diamond conical indenters with semi-angles of 45°, 60°, and 70° were used. The load–indentation depth curves were obtained by varying the indenter angles, and the structural phase transformations of single-crystal Si were observed from an atomistic view. In addition, the hardness and elastic modulus with varying indenter angles were evaluated based on the Oliver–Pharr method and Sneddon’s solution. The si

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Ibrahim, M. A., and F. P. Stacom. "Phase angle regulating transformer protection." IEEE Transactions on Power Delivery 9, no. 1 (1994): 394–404. http://dx.doi.org/10.1109/61.277711.

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Alturaigi, M. A. "Real-time phase-angle measurement." Canadian Journal of Electrical and Computer Engineering 21, no. 2 (1996): 57–60. http://dx.doi.org/10.1109/cjece.1996.7102126.

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Dillenz, A., T. Zweschper, G. Riegert, and G. Busse. "Progress in phase angle thermography." Review of Scientific Instruments 74, no. 1 (2003): 417–19. http://dx.doi.org/10.1063/1.1524010.

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Ozawa, Akira. "Phase angle analysis of single-phase induction motor." Electrical Engineering in Japan 106, no. 6 (1986): 59–66. http://dx.doi.org/10.1002/eej.4391060607.

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Liu, Jie, Xiang Bo Li, Jia Wang, and Shou Biao Li. "The Evaluation of Organic Coating with Artificial Defect Degradation with EIS Measurement: Phase Angle at High Frequencies." Advanced Materials Research 194-196 (February 2011): 2027–30. http://dx.doi.org/10.4028/www.scientific.net/amr.194-196.2027.

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Electrochemical impedance spectra (EIS) of two kinds of damage rate samples in natural seawater were measured and the relations between coating resistances and phase angles at high frequencies were analyzed. The results indicated that for the coating systems studied, the variation of phase angles at 14 kHz with immersion time was very close to the variation of coating resistance, hence may qualitatively reﬂect the coating with artificial defect degradation. This approach contains no error in calculation and the special phase angle parameters could be extracted easily from the EIS measured data

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Weber, R., and M. Münster. "Transient Properties of Truck Tires on Real Road Surfaces." Tire Science and Technology 15, no. 3 (1987): 188–97. http://dx.doi.org/10.2346/1.2148789.

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Abstract The cornering, or lateral force response of heavy-duty truck tires, has been evaluated on real road surfaces at speeds of 10–60 km/h. The special mobile truck tire dynamometer has a two-test-tire carriage mounted just ahead of the rear support tires of an articulated truck (tractor) trailer. Equal slip angles may be applied simultaneously to both test tires. The frequency response was evaluated by typical phase angle methods. The phase angle (lag of lateral force behind instantaneous angle) increased with frequency (time rate of application of angle) and decreased with increasing spee

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Zhu, Xinfa, та George A. McMechan. "Amplitude and phase versus angle for elastic wide-angle reflections in the τ‐p domain". GEOPHYSICS 80, № 1 (2015): N1—N9. http://dx.doi.org/10.1190/geo2013-0191.1.

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Near- and postcritical spherical-wave reflections contain amplitude and phase variations with incident angle that are not predicted by plane-wave solutions. However, if a spherical wavefield is decomposed into plane waves by a time-intercept-slowness ([Formula: see text]) transform, then plane-wave reflection coefficients (the Zoeppritz) can be used as the basis of amplitude/phase versus angle analysis. The spherical-wave effects on reflection coefficients near the critical angle (in the time-offset domain) were decomposed by [Formula: see text] transformation into plane waves. Kinematic ray t

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Gorbunov, Michael E., and Gottfried Kirchengast. "Wave-optics uncertainty propagation and regression-based bias model in GNSS radio occultation bending angle retrievals." Atmospheric Measurement Techniques 11, no. 1 (2018): 111–25. http://dx.doi.org/10.5194/amt-11-111-2018.

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Abstract. A new reference occultation processing system (rOPS) will include a Global Navigation Satellite System (GNSS) radio occultation (RO) retrieval chain with integrated uncertainty propagation. In this paper, we focus on wave-optics bending angle (BA) retrieval in the lower troposphere and introduce (1) an empirically estimated boundary layer bias (BLB) model then employed to reduce the systematic uncertainty of excess phases and bending angles in about the lowest 2 km of the troposphere and (2) the estimation of (residual) systematic uncertainties and their propagation together with ran

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Negussey, D., W. K. D. Wijewickreme, and Y. P. Vaid. "Constant-volume friction angle of granular materials." Canadian Geotechnical Journal 25, no. 1 (1988): 50–55. http://dx.doi.org/10.1139/t88-006.

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The postulate that the constant-volume friction angle [Formula: see text] of a granular material is unique and a function of mineral composition is verified experimentally. Granular materials comprised of particles ranging from minerals to metals are tested in a ring shear apparatus. Test samples are subjected to large shear displacements until a constant lower bound friction angle [Formula: see text] is mobilized. Possible effects of confining pressure, initial packing density, gradation, and particle shape on the value of [Formula: see text] are investigated. Friction angles mobilized in dra

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VAHEY, DAVID W., JOHN M. CONSIDINE, and MICHAEL A. MACGREGOR. "Influence of forming conditions on fiber tilt." TAPPI Journal 12, no. 4 (2013): 33–40. http://dx.doi.org/10.32964/tj12.4.33.

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Fiber tilt describes the projection of fiber length in the thickness direction of paper. The projection is described by the tilt angle of fibers with respect to the plane of the sheet. A simple model for fiber tilt is based on jet-to-wire velocity differential in combination with cross-flows on the wire. The tilt angle of a fiber is found to vary as the sine of its in-plane orientation angle. The phase of variation is a large multiple of the fiber-misalignment angle associated with the cross flow. The multiple can decrease from 40 to 8 as the cross-flow angle increases from 1° to 10°, showing

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Biondi, Biondo. "Angle-domain common-image gathers from anisotropic migration." GEOPHYSICS 72, no. 2 (2007): S81—S91. http://dx.doi.org/10.1190/1.2430561.

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I present a general methodology for computing angle-domain common-image gathers (ADCIGs) in conjunction with anisotropic wavefield-continuation migration. The method is based on transforming the prestack image from the subsurface-offset domain to the angle domain using slant stacks. The processing sequence is the same as that for computing ADCIGs for the isotropic case, though the interpretation of the relationship between the slopes measured in the prestack image and the aperture angles is more complex. I demonstrate that the slopes measured by performing slant stacks along the subsurface-off

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Zhang, Fan, Martin Böhle, and Shouqi Yuan. "Experimental investigation on the performance of a side channel pump under gas–liquid two-phase flow operating condition." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 231, no. 7 (2017): 645–53. http://dx.doi.org/10.1177/0957650917713090.

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Side channel pump is a kind of small volume vane pump with low flow rate but high head and most side channel pumps can transport gas–liquid two-phase flow. In order to investigate the performance of this type of pump depending on the blade suction angle under gas–liquid two-phase flow operating condition, an experimental study has been carried out. The head and efficiency curves, and the influence of blade suction angle changes on these curves for different inlet gas volume fraction states are analyzed in detail. Moreover, the gas transporting capability of the impeller with three different bl

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Turhan, Burak, Hasan Kamliya Jawahar, Abhishek Gautam, et al. "Acoustic characteristics of phase-synchronized adjacent propellers." Journal of the Acoustical Society of America 155, no. 5 (2024): 3242–53. http://dx.doi.org/10.1121/10.0025990.

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This experimental study investigates the effect of blade phase angle on noise attenuation in two adjacent, electronically synchronized propellers. Acoustic measurements were performed in an aeroacoustic wind tunnel with a distributed electric propulsion system that involved the adjustment of relative phase angles of 2-bladed propellers between Δψ = 0° and 90°. Ranges of advance ratios (J = 0–0.73) were investigated at a fixed propeller rotation speed of 5000 rpm. The investigation explored the impact on noise directivity and frequency characteristics. The findings reveal significant reductions

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Behura, Jyoti, and Ilya Tsvankin. "Role of the inhomogeneity angle in anisotropic attenuation analysis." GEOPHYSICS 74, no. 5 (2009): WB177—WB191. http://dx.doi.org/10.1190/1.3148439.

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The inhomogeneity angle (the angle between the real and imaginary parts of the wave vector) is seldom taken into account in estimating attenuation coefficients from seismic data. Wave propagation through the subsurface, however, can result in relatively large inhomogeneity angles [Formula: see text], especially for models with significant attenuation contrasts across layer boundaries. Here we study the influence of the angle [Formula: see text] on phase and group attenuation in arbitrarily anisotropic media using the first-order perturbation theory verified by exact numerical modeling. Applica

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Zhang, Junhui, Shuxin Liu, Yang Liu, Chaojian Xing, and Jing Xu. "Optimization of AC contactor closing phase angle based on entropy weight method and efficacy coefficient method." Journal of Physics: Conference Series 2849, no. 1 (2024): 012009. http://dx.doi.org/10.1088/1742-6596/2849/1/012009.

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Abstract Aiming at the problem that the optimal closing phase angle cannot be determined in the optimal closing control of AC contactor, this paper combines the finite element model of AC contactor with experimental data to determine the optimal range through the influence of different closing phase angles on the core closing speed, closing time and bounce time indexes, and then uses the entropy weight method to determine the weight of each index. The comprehensive evaluation function is constructed with the method of power function, and the optimal closing phase angle is obtained. Finally, th

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Zheng, Chen, Fan, Hu, Chen, and Pu. "Detecting the Extremely Small Angle of an Axicon by Phase-Shifting Digital Holography." Applied Sciences 9, no. 19 (2019): 3959. http://dx.doi.org/10.3390/app9193959.

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Axicon is an optical element that can be used to produce high-quality Bessel beams efficiently. In general, the smaller the base angle of the axicon is, the longer the diffraction-free distance of the generated Bessel beam will be. Therefore, axicon with an extremely small base angle is important for the generation of Bessel beam. However, the measurement of an extremely small base angle is a challenge. Here, we applied the phase-shifting digital holography in the measurement of axicon angle. The errors of the three measured axicons with base angles of 0.5°, 1°, and 1° were 1.94%, 4.43%, and 1

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Lisovsky, A. F. "Thermodynamic interpretation of a dihedral angle in composite materials." Science of Sintering 36, no. 2 (2004): 81–86. http://dx.doi.org/10.2298/sos0402081l.

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The equilibrium between solid and 1iquid phases in sintered composite materials has been studied. It is shown that closed surfaces, which bound dispersed phases, influence the mechanical equilibrium between these phases. An expression is derived for a dihedral angle in composite materials, which includes values of surface tensions at the phase interfaces as well as parameters of a composite equilibrium structure (phase composition, particle contiguity and coefficients of a particle geometry).

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Matúš, Ivan, Pavel Ružbarský, and Bibiana Vadašová. "Key Parameters Affecting Kick Start Performance in Competitive Swimming." International Journal of Environmental Research and Public Health 18, no. 22 (2021): 11909. http://dx.doi.org/10.3390/ijerph182211909.

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The study aims to determine the contribution of kinematic parameters to time to 5 m without underwater undulating and kicking. Eighteen male competitive swimmers started from three weighted positions and set the kick plate to positions 1–5. We used SwimPro cameras and the Dartfish© software. In the on-block phase, we found significant correlations (p < 0.01) between the front ankle angle and block time. The correlations between start phases were statistically significant (p < 0.01) between block time and rear ankle angle, respectively, to time to 2 m; rear knee angle and glide time; bloc

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Naidu, P. Vasudeva, M. Bindu Priya, and K. Gokul Sai Krishna. "Optimization of Phase jump angle of Series Active Power Filter (SAPF)." International Journal of Engineering Research 3, no. 9 (2014): 526–30. http://dx.doi.org/10.17950/ijer/v3s9/902.

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Shinsen, Masahiro, Mitsuaki Furui, Susumu Ikeno, and Takekazu Nagae. "Deformation Characteristics in AlphaType Brass Worked by Torsion." Materials Science Forum 654-656 (June 2010): 1251–54. http://dx.doi.org/10.4028/www.scientific.net/msf.654-656.1251.

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In present work, bar samples of pure copper and Cu-Zn alpha single phase alloys setting 20mm in diameter and 150mm in length processed by torsion in the rotation speed to 1rpm every 60° twist angles. Then, deformed samples were researched microstructure and their characteristics. Microstructures of non-deformation samples were isometric, however, deformed samples streaky. Elements of bar drawn 10×10mm mesh were developed parallelogram. It was trend angle of between stretchable direction in microstructures and torsion axis increased more torsion angles. It was coincident with between the angle

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Kim, Woosup, Taeyoung Kim, Jun Do, Heechang Ma, Heesun Yoon, and Kanghee Won. "Stripe Noise Removal in Blazed Grating Generation for Electrically Tunable Beam Deflector." Materials 18, no. 2 (2025): 291. https://doi.org/10.3390/ma18020291.

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In this paper, we demonstrate a blazed phase grating to achieve tunable beam steering and propose a novel algorithm to reduce the stripe noise in wrapped phase. To control the diffraction angle to steer light to the desired direction, an electrically tunable transmission-type beam deflector based on liquid crystals is introduced, and electric fields are applied to the patterned indium tin oxide electrodes to change its phase retardation. Two different 2π phase-wrapping methods are applied to obtain various diffraction angles within the minimum cell-gap, and the method of equal interval of phas

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Syahid, Muhammad Maulvi, Agus Rusdiana, Yudy Hendrayana, Rizki Hazazi Ali, and Tian Kurniawan. "Fatigue Effect on Attack Accuracy and Kinematic Variables Performance Lunge Action In Fencing." Jurnal Terapan Ilmu Keolahragaan 7, no. 1 (2022): 1–5. https://doi.org/10.17509/jtikor.v7i1.41906.

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The purpose of this study was to determine the effect of muscle fatigue on attack accuracy and lower body kinematics when performing lunges in epee class fencing. Kinematics analysis consists of five phases in the lunge movement, namely Angle at initiation, Angle at termination, Range of motion, Peak range of motion, Peak angle, Peak Hip angular velocity, Peak Knee angular velocity, Peak Ankle angular velocity and Stride Length. This research method is descriptive quantitative. The number of samples was 5 city-level male fencing athletes. The research sample showed an average age of 19.68 ± 2.

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