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10781
A Novel CP Horn Antenna with Switchable Polarization by Single Port Feeding
Published 2015-01-01“…The antenna achieves an impedance bandwidth (3.88~5.12 GHz) of 27.5% and a 3 dB-AR (Axial Ratio) bandwidth of 18.6%, with the 3 dB-AR beamwidth of about 149°, and the antenna gain is over 13.3 dB in the available band.…”
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10782
Circularly polarized dual-band resonance in a miniaturized implantable antenna using combined hexagonal and rhombic patches
Published 2025-01-01“…The antenna is noteworthy for achieving circular polarization with a broad axial ratio bandwidth of 24.6%, which enables strong performance throughout its operating frequencies. …”
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10783
Experimental Study of Water and Sediment Separation under Hydrocyclone and Flocculation
Published 2020-01-01“…In order to study the effect of the combined technology of hydrocyclone and flocculation on the sediment content of water bodies,this paper measures the surface velocity and turbidity by a laboratory self-circulating physical model,ADV and ASM-IV turbidimeter,and analyzes the flow pattern and sediment distribution in the hydrocyclone pool.The results show that:The internal flow field of the hydrocyclone pool is a typical three-dimensional axisymmetric flow field;the turbidity in the hydrocyclone pool gradually decreases from the side wall to the center in the radial direction,and the turbidity gradually increases in the axial direction.Under the same sediment conditions,when the flocculant concentration was 5 mg/L,the effect of final sediment contents in purified water (water purified by the outer ring twice) is the best;the smaller the inlet flow of the hydrocyclone pool,the smaller the final sediment content in purified water.Compared with flocculant,inlet flow has a greater impact on the final sediment content in purified water,so it is a key factor in reducing the sediment content. …”
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10784
HIGH⁃FIDELITY FINITE ELEMENT SIMULATION AND EXPERIMENTAL VERIFICATION OF BOLT PRELOAD FORCE UNDER TIGHTENING TORQUE
Published 2024-08-01“…The finite element simulation method of bolt torsion under the tightening torque process was carried out,a quantitative relation between the tightening torque and the bolt preload was established for an actual structure.Firstly,the geometric model of the bolt with three⁃dimensional oblique thread was built,and the finite element mesh with thread was divided by using Hypermesh software,and the corresponding mechanical contact pairs were redefined.Then,Ansys Workbench software was used to apply the different sizes of tightening torque to the lower surface of the nut to obtain the magnitude of the corresponding axial force,so that the functional relation between the tightening torque and the bolt tension could be obtained.Finally,a bolt preload test was designed and the experimental,emulational and theoretical results were compared to verify the method.The results show that the results of the finite element simulation model are closer to the experimental results compared to the theoretical calculation results.The high⁃fidelity finite element model of bolt preload in this paper provides an important method for further accurate analysis of the bolt mechanics mechanism.…”
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10785
A Novel Design of CPW Feed Planar Omnidirectional Circularly Polarized Antenna
Published 2021-01-01“…Through the analysis of the measurement results, we have obtained the following conclusions: the operating bandwidth of the proposed antenna obtained by measurement is from 5.67 to 5.86 GHz, in which the reflection coefficient is less than −10 dB and the axial ratio is less than 3 dB. Within the available bandwidth, the proposed antenna achieves omnidirectional radiation characteristics with a gain between 0.89 and 2.48 dBic.…”
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10786
Resisting Bolsonaro: The Mobilization of the Tupinambá of Serra do Padeiro to Defend Their Territory and Collective Projects
Published 2025-01-01“…Abstract The main objective of this article is to examine the political mobilization of the Tupinambá of Serra do Padeiro (southern Bahia) during the presidential term of Jair Messias Bolsonaro (2019-2022). …”
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10787
Fetus in Fetu in an Adult Female and Brief Review of Literature
Published 2021-01-01“…It should be differentiated from teratoma by the presence of organized vertebral column and appropriately arranged other organs or limbs around it. There is no such axial arrangement in teratoma, which has also got definite malignant potential. …”
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10788
Detection of Mesiobuccal Canal in Maxillary Molars and Distolingual Canal in Mandibular Molars by Dental CT: A Retrospective Study of 100 Cases
Published 2010-01-01“…A retrospective study of 100 Dental CTs was done. Axial and paraxial images obtained were used to assess the presence of MB2 canal in maxillary molars and distolingual canal in mandibular molars. …”
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10789
Deformation and Failure Characteristics of Soil-Rock Mixture considering Material Composition and Random Structure
Published 2019-01-01“…The results indicate that the deformation and failure of the soil-rock mixture under axial pressure appear a significant phenomenon of detouring around rock blocks. …”
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10790
High-Gain Quad Array of Nonuniform Helical Antennas
Published 2019-01-01“…The gain of one optimal nonuniform helical antenna can be about 2.5 dB higher than the gain of a uniform helical antenna of the same axial length. Creating a 2×2 array further increases the gain up to about 6 dB. …”
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10791
Quiste renal hiperdenso. Presentación de un caso
Published 2015-12-01“…Mediante estudio por tomografía axial computadoriada, simple y con contraste endovenoso, se le diagnosticó un quiste renal hiperdenso tipo II, según la clasificación de Bosniak.…”
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10792
BASED ON THE NUMERICAL SIMULATION OF COLD ROLL-BEATING FORMING RESIDUAL STRESS RESEARCH
Published 2019-01-01“…Because inner force of workpiece in result of dynamic simulation is at unbalance state, it cannot directly solve the residual stress, so the static simulation model is established on result of dynamic simulation, and the roll-beating depth of different roll-beating of forming gullet section residual stress in tangential direction, axial direction and radial direction is determined by static analysis. …”
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10793
Diagnosis of diastematomyelia associated with tethered cord in an adult patient. A case report
Published 2021-04-01“…Nuclear magnetic resonance and computerized axial tomography showed diastematomyelia associated with tethered cord. …”
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10794
Contact Stress Analysis of Traction Drives of a New Type Bearing Reducer
Published 2023-09-01“…The distribution and size of the contact stress at the flange are basically the same under different convexity modification, and the axial and radial contacts between the contact line of the planet wheel and the outer ring and the contact line of the sun wheel and the flange can remain on a traction line.…”
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10795
Broadband Dual Circularly Polarized Magnetoelectric Dipole Antenna Fed by a Miniaturized Six-Branch Hybrid Coupler
Published 2016-01-01“…Measurement results show that the proposed dual circularly polarized MEDA achieves an impedance bandwidth of 84.5%, an axial-ratio bandwidth of 81.8%, and a nearly symmetrical, stable unidirectional radiation pattern with an average gain of 8 dBic over its impedance bandwidth.…”
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10796
Reprodutibilidade interavaliadores da identificação da redução da cadência em exercícios de força
Published 2013-05-01“…Dez universitários, com experiência prévia em treinamento de força realizaram 3 séries até a fadiga concêntrica, com 2 minutos de intervalo em 6 exercícios (leg press 45°, supino horizontal, extensão do joelho, remada baixa, flexão do joelho e elevação frontal). Dois avaliadores independentes registraram o momento da redução da cadência. …”
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10797
Creep-fatigue life evaluation of high chromium ferritic steel under non-proportional loading
Published 2016-10-01“…The circle loading test is non-proportional strain path test in which sinusoidal waveforms of axial and shear strains have 90 degree phase difference. …”
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10798
A Literature Review of Recent Advances on Innovative Computational Tools for Waste Management in Smart Cities
Published 2025-01-01“…Leveraging computational tools such as artificial intelligence, Internet of Things, and big data analytics, smart waste management systems enable real-time monitoring, predictive modeling, and optimization of waste-related operations. …”
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10799
Analysis of Statics Load Sharing based on Meshing Characteristic for Straight Bevel Gear Split Transmission
Published 2021-01-01“…The results show that static load sharing coefficient increases gradually with the increase of both support stiffness and the alignment errors, the influences of axial and bias alignment error on it are the same level. …”
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10800
Experimental Study on Constant-Amplitude Fatigue Performance of Weld Toe in Steel Tube of Welded Hollow Spherical Joints in Grid Structures
Published 2019-01-01“…Twenty effective test data were obtained and fitted to a fatigue S-N curve by the least squares method. …”
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