Planar W-Band Mixer With a Novel if-Block

Zhan, Ming; Xu, Quansheng; Zhao, Wei; Zhang, Yong; Xu, Ruimin; Lin, Weigan

doi:10.2528/pierc11022405

Cited by 11 publications

(8 citation statements)

References 14 publications

(14 reference statements)

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“…PIV measurements of the glottal flow using flexible and static models of the TVFs also demonstrated that the FVFs could interfere with the starting vortex and create vortices in this region [16,17]. Impingement of the glottal jet on the FVFs was also observed in the computational simulations when the Iaryngeal flow was assumed symmetric [26]. The rebound vortices in the current work detach the surface of the F'VFs and move in the Iaryngeal ventricle toward the TVFs; however, they do not reach the TVFs during the simulation.…”

Section: Comparison With Previous Investigation Of the Glottalmentioning

confidence: 75%

“…The growth of these instabilities forms vortical structures in the shear layer of the jet flow, and the impingement of these flow structures creates additional sources of sound [25]. Computational studies of Zhang et al [26] showed that the reattachment of the glottal jet flow with the FVFs created dipole acoustic sources. Medial compression of the FVFs in excised larynx experiments of Alipour et al [23] increased the sound intensity.…”

Section: Introductionmentioning

confidence: 99%

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A Numerical and Experimental Investigation of the Effect of False Vocal Fold Geometry on Glottal Flow

Farahani

Mousel

Alipour

et al. 2013

Journal of Biomechanical Engineering

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The false vocal folds are hypothesized to affect the laryngeal flow during phonation. This hypothesis is tested both computationally and experimentally using rigid models of the human larynges. The computations are performed using an incompressible Navier-Stokes solver with a second order, sharp, immersed-boundary formulation, while the experiments are carried out in a wind tunnel with physiologic speeds and dimensions. The computational flow structures are compared with available glottal flow visualizations and are employed to study the vortex dynamics of the glottal flow. Furthermore, pressure data are collected on the surface of the laryngeal models experimentally and computationally. The investigation focuses on three geometric features: the size of the false vocal fold gap; the height between the true and false vocal folds; and the width of the laryngeal ventricle. It is shown that the false vocal fold gap has a significant effect on glottal flow aerodynamics, whereas the second and the third geometric parameters are of lesser importance. The link between pressure distribution on the surface of the larynx and false vocal fold geometry is discussed in the context of vortex evolution in the supraglottal region. It was found that the formation of the starting vortex considerably affects the pressure distribution on the surface of the larynx. The interaction of this vortex structure with false vocal folds creates rebound vortices in the laryngeal ventricle. In the cases of small false vocal fold gap, these rebound vortices are able to reach the true vocal folds during a time period comparable with one cycle of the phonation. Moreover, they can create complex vorticity patterns, which result in significant pressure fluctuations on the surface of the larynx.

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Section: Comparison With Previous Investigation Of the Glottalmentioning

confidence: 75%

Section: Introductionmentioning

confidence: 99%

A Numerical and Experimental Investigation of the Effect of False Vocal Fold Geometry on Glottal Flow

Farahani

Mousel

Alipour

et al. 2013

Journal of Biomechanical Engineering

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“…Indeed, these techniques cannot regenerate the urethral muscle tissue that regulates the exit of urine. With advances in materials science, innovative approaches based on regenerative medicine to regenerate damaged or weakened urethral tissues have been widely investigated using various biomaterials. − Some research groups demonstrated that injection of cells (i.e., stem cells, progenitor cells, or adult cells) encapsulated with biomaterials at the defect promoted sphincter regeneration and restored the biological function in animal models and clinical applications. , In addition, sustained release of growth factors (GFs) from the bulking materials, such as basic fibroblast growth factor (bFGF) and nerve growth factor (NGF), has been implicated as a promising strategy to promote the regeneration of the urethral muscle and thus recover urethral muscle function. , However, for effective therapeutics, it is still a challenge to overcome the limitations of GF delivery in vivo, such as the very short half-life in vivo . Many researchers have endeavored to design biomaterials that allow for the long-term GF delivery and the retention of GF activity.…”

Section: Introductionmentioning

confidence: 99%

Macro/Nano-Gel Composite as an Injectable and Bioactive Bulking Material for the Treatment of Urinary Incontinence

et al. 2014

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Many women around the world are suffering from urinary incontinence, defined as the unintentional leakage of urine by external abnormal pressure. Although various kinds of materials have been utilized to treat this disease, therapies that are more effective are still needed for the treatment of urinary incontinence. Here, we present a macro/nanogel composed of in situ forming gelatin-based macrogels and self-assembled heparin-based nanogels, which can serve as an injectable and bioactive bulking material for the treatment of urinary incontinence. The hybrid hydrogels were prepared via enzymatic reaction in the presence of horseradish peroxidase and hydrogen peroxide. Incorporating a growth factor (GF)-loaded heparin nanogel into a gelatin gel matrix enabled the hybrid gel matrix to release GF continuously up to 28 days. Moreover, we demonstrated that the hydrogel composites stimulated the regeneration of the urethral muscle tissue surrounding the urethral wall and promoted the recovery of their biological function when injected in vivo. Thus, the macro/nanohydrogels may provide an advanced therapeutic technique for the treatment of urinary incontinence as well as an application for regenerative medicine.

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“…Millimeter-wave and submillimeter-wave frequency multipliers [1][2][3][4][5][6] and mixers [7][8][9][10][11][12][13][14] based on planar Schottky diodes are widely used for atmosphere and space detection. The multipliers are usually driven by an oscillator [15][16][17][18] or a phase-locked millimeter-wave source.…”

Section: Introductionmentioning

confidence: 99%

A New Scheme for the Design of Balanced Frequency Tripler With Schottky Diodes

Guo¹,

Xu²,

Qian³

2013

PIER

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Abstract-We propose a balanced frequency tripler scheme for millimeter-wave and submillimeter-wave application, in which doublesided suspended stripline is adopted. Two arms of Schottky diodes are mounted on the upper side of the substrate, and the other two arms of diodes are mounted on the lower side. The diodes are DC biased without bypass chip capacitor, which is essential in the common used balanced tripler scheme. Furthermore, the numbers of the diodes are doubled as there are only two arms of diodes in the common balanced tripler scheme, and this will double the power handling capability of the tripler. A W-band frequency tripler is designed according to the proposed scheme with commercial Schottky Varistors. The output power is from 2.9 to 5.7 dBm at the frequencies from 89.7 to 94.8 GHz, with the conversion efficiency from 1.95% ∼ 3.7%.

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Planar W-Band Mixer With a Novel if-Block

Cited by 11 publications

References 14 publications

A Numerical and Experimental Investigation of the Effect of False Vocal Fold Geometry on Glottal Flow

A Numerical and Experimental Investigation of the Effect of False Vocal Fold Geometry on Glottal Flow

Macro/Nano-Gel Composite as an Injectable and Bioactive Bulking Material for the Treatment of Urinary Incontinence

A New Scheme for the Design of Balanced Frequency Tripler With Schottky Diodes

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