Zeroth‐order spatial electromagnetic force wave has been regarded as one of the main sources for vibration and noise integer slot multipole permanent magnet synchronous machine (PMSM) used in electric vehicles. In this study, 48‐slot‐8‐pole built‐in motor a vehicle was taken an example. The characteristic parameters (frequency amplitude) zeroth‐order PMSM were presented. Based on this, method stator rotor structure optimisation proposed to effectively reduce magnitudes by increasing natural...

In order to extend the speed-operation range for constant generating voltage or motoring power of electrical machine, a new hybrid excitation machine with isolated magnetic paths (HEIMP) is presented in this paper. Its structure, operation mechanism, and two crucial design points are described detail. A conceptual prototype designed manufactured integration rotating-armature ac exciter (brushless). It then simulated by finite element analysis software tested verify efficient field-adjusting...

A U-shape probe for microwave resonance in plasma was investigated a range of high pressure (10–760 Torr). The electromagnetic field finite difference time domain-simulation the revealed that, resistive at pressure, resonant frequency fr approaches dipole-antenna vacuum, with almost no dependence on electron density ne. However, width Δf is sensitive to showing maximum value ∼20 Torr. normalized (Δf/fr) corrected by one vacuum (no plasma) linearly proportional ne, and inversely νm...

Improving imaging quality is a fundamental problem in ultrasound contrast agent (UCAI) research. Plane wave (PWI) has been deemed as potential method for UCAI due to its' high frame rate and low mechanical index. High can improve the temporal resolution of UCAI. Meanwhile, index essential since microbubbles be easily broken under conditions. However, clinical practice plane (UCPWI) still limited by poor lack transmit focus. The purpose this study was propose validate new post-processing that...

Aiming at the problem of excessive eddy current loss permanent magnets in fractional slot concentrated winding magnet synchronous motors (FSCW-PMSM) high speed, a new PMSM with hybrid rotor structure for electric vehicles (EV) is proposed article, key to introduce additional ferrite <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$d$ </tex-math></inline-formula> - and notation="LaTeX">$q$ -axis magnetic...

Optofluidic resonators are capable of characterizing various fluidic media. Here, we propose an optofluidic microbottle resonator (OFMBR) that is applied to generate pendant droplets, whose maximum mass related the liquid surface tension. Mass and type droplets forming along OFMBR stem can be monitored in real time by spectrum variation. As a droplet grows, increased gravity introduces decreased coupling gap compressive force between tapered fiber OFMBR, leading resonance wavelength shift....

In this paper, the radial electromagnetic force in horizontal circular channel of an induction-heating tundish is derived. A dimensionless trajectory model inclusion developed and numerically solved to acquire moving inclusion. When lower half channel, direction vertical component pinch which acts on opposite buoyancy. Provided their magnitudes are same, there a balanced-position for inclusions channel. Therefore, dead-zone exists near balanced-position, where removal time with AC...

To attain the dominant noise sources and assess performance for optimizing EV's driving machine design, a electromagnetic assessment method is presented. The responses of radial force waves are calculated separately by coupling structural FEM, then superposed to machines within its operating range. characteristics 48s8p PM with this method. It shown that 0-order appears be source in integer slot high number pole pairs. This conclusion has also been verified experiments.

Contrast-enhanced ultrasound (CEUS) is a valuable imaging modality for diagnosis of liver cancers. However, the complexity CEUS-based limits its wide application, and B-mode (BUS) still most popular in clinical practice. In order to promote BUS-based computer-aided (CAD) cancers, we propose learning using privileged information (LUPI) based CAD with BUS as CEUS PI. Particularly, multimodal restricted Boltzmann machine (MRBM) works LUPI paradigm. That is, one image three images from arterial...

Abstract With the rapid development of industrial development, city's noise pollution has become increasingly serious. Based on principle re-used energy, analysis re-use pollution, and its use in electric vehicle were. The new areas expanding energy.

It is necessary to investigate the distribution of nitrogen forms in river sediments recognize water environment quality. In this study, ion exchangeable form nitrogen(IEF-N), weak acid extractable (WAEF-N), strong alkali (SAEF-N) and oxidation (SOEF-N) were obtained by means sequential extraction procedures.We analyzed spatial variations from Taihu watershed (Dongtiaoxi River Xitiaoxi River) Hongzehu (Anhe Suihe River), expounded influence factors distribution. The results showed that...

For water cooling ultra-precision planar motor used for Lithography equipment, transient and steady thermal analyses are effectiveness to predict the temperature distribution requirement on system. This paper investigates calculating couple field of fluid through 3D finite-element analysis (FEA). The result provides foundation improving performance, structural optimization as well design

It is valuable for diagnosis of atherosclerosis to detect lumen and media-adventitia contours in intravascular ultrasound (IVUS) images atherosclerotic plaques. In this paper, a method contour detection plaques proposed utilizing the prior knowledge elliptic geometry Contours are initialized as ellipses by using ellipse template matching, where matching function maximized particle swarm optimization. Then refined boundary vector field snakes. The was evaluated via 88 vivo from 21 patients....

The CdZnTe (CZT) micro-strip detector packaging plays a dominant role in performance, which can decrease the noise of detectors and improve spectral energy resolution. surface passivation is an important step device packaging. In this paper, comparison between chemical physical processes has been made. particular, new process for CZT studied by depositing diamond like carbon (DLC) film with radio frequency plasma vapor deposition (RFPCVD) method. micro-structural, electric characteristics...

Abstract Rational: Occult breast cancer (OBC) is an extremely rare and defined by the presence of axillary metastasis without a primary tumor in breasts or any abnormality on radiologic examination. Patient concerns: This case report presents 49-year-old man who was diagnosed with male OBC, which first manifested as lymph node followed emergence infraclavicular metastasis. Neither nor other organs had abnormality. Diagnosis: The pathological examination revealed metastatic adenocarcinoma....

To more efficiently design high performance vehicular permanent magnet motor, an electromagnetic-thermal integration method is presented, which considers both the electromagnetic properties and temperature rise of motor winding when determining main dimensional parameters motor. Then a 48-slot 8-pole designed with this method. The thermomagnetic coupling simulated validated on basis multiphysical domain finite element analysis. prototype analyzed tested newly built experiment platform. It...