<title>Abstract</title> Purpose To evaluate the application and efficacy of a novel continuous irrigation mode in endoscopic ear surgery for external auditory canal cholesteatoma (EACC). Methods A retrospective analysis 66 patients undergoing EACC at Shenzhen Nanshan People’s Hospital (January 2022 – December 2023) was conducted. Patients were divided into two groups 33 each: (experimental) non-irrigation (control). Key metrics included intraoperative lens cleaning frequency, operation...

Flexible electronic devices are developing rapidly, especially in medical applications. This paper reports an arrayed flexible piezoelectric micromachined ultrasonic transducer (FPMUT) with a sandwich structure for adjuvant treatment of bone injury. To make the device conformable and stretchable attaching to skin surface, substrate polydimethylsiloxane (PDMS) was combined metal line interconnection between bulk lead zirconate titanate (PZT) arrays. Simulations experiments were carried out...

The marine biological sonar system evolved in the struggle of nature is far superior to current artificial sonar. Therefore, development bionic underwater concealed detection great strategic significance military and economy. In this paper, a generative adversarial network (GAN) trained based on dolphin vocal sound dataset we constructed, which can achieve unsupervised generation sounds with global consistency. Through analysis generated audio samples real time domain frequency domain, it be...

To investigate the feasibility and efficacy of transcanal endoscopic treatment for congenital middle ear cholesteatoma in children. Eleven children diagnosed with cholesteatoma, who underwent total surgery under general anesthesia, were included from Huazhong University Science Technology Union Shenzhen Hospital between January 2016 December 2020. We retrospectively analyzed their operation process surgical complications through video; moreover, we compared pre- postoperative hearing...

To make up the insufficiency and instability of contact inkers that are currently used for defective dice marking in integrated circuit production, a noncontact jetting inker is introduced this paper. The volume fluid (VOF)/continuum surface force (CFS) model to establish mathematical description liquid into ambient air, actuating pressure waveform estimated droplet generation. Subsequently, numerical simulation taken reveal dynamic characteristics generating mechanism jetting. Emergence...

In the fast tool servo (FTS) system for microstructure surface cutting, dynamic voltage hysteresis of piezoelectric actuators (PEAs) and cutting force produced in manufacturing affect driving accuracy performance. For a multi-input-single-output (MISO) system, this paper, model based on rate-dependent Prandtl–Ishlinskii is proposed. A backpropagation neural network (BPNN) established to describe cross-coupling effect between applied external load. An inverse developed compensate nonlinearity...

Solid materials with cracks exhibit the nonclassical nonlinear acoustical behavior. The micro-defects in solid can be detected by elastic wave spectroscopy (NEWS) method a time-reversal (TR) mirror. While defects lie viscoelastic material different distances from one another, and hysteretic stress—strain relation is established Preisach—Mayergoyz (PM) model crack zone. Pulse inversion (PI) TR methods are used numerical simulation defect locations determined images obtained maximum value....

During the ultraprecise cutting of micro-structure surface with fast tool servo (FTS), hysteresis piezoelectric actuators (PEAs) are affected by dynamic voltage excitations and real-time force, which declines accuracy performance. In this paper, for a multi-input-single-output (MISO) system, cross-coupling rate-dependent Prandtl-Ishlinskii (CRPI) model is proposed identified PEAs under excitation external loads. A reference adaptive control method then presented to eliminate positioning...

Micro-nano materials and their manufacture have become increasingly commonly used in the field of chip manufacturing as nanotechnology has advanced. In this area, use carbon nanotubes (CNTs) to build high-performance three-dimensional micro-nano devices gotten a lot interest. The manipulation robot system built scanning electron microscope (SEM) is currently assemble nanotube devices. Secondary detectors SEMs are record secondary pictures perceptual tool for automated assembly visual...

Flexible electronic devices are developing rapidly, especially in the medical field. This paper reports a flexible piezoelectric micro-machined ultrasonic transducer (FPMUT) array. In designing process, we utilize interconnection as electrical connecting wire between ceramics Meanwhile, polydimethylsiloxane (PDMS) films act substrates for whole device. It has flexibility and good conformal contacting with skin surfaces. sandwich-structure of FPMUT combination rigid features. also great...

With converged shock wave, extracorporeal wave lithotripsy (ESWL) has become a preferable way to crush human calculi because of its advantages efficiency and non-intrusion. Nonlinear spheroidal beam equations (SBE) are employed illustrate the acoustic propagation for transducers with wide aperture angle. To predict field distribution precisely, boundary conditions obtained SBE model monochromatic when source is located on focus an ESWL transducer. Numerical results in water analyzed...

The seawater desalination technology provides an effective way to solve the shortage issue of freshwater resources. This paper describes current water resource situation Shandong Province which calls for a system serve itself continuously. Having analyzed wind and solar energy recourses in Shandong, this article bring up reverse osmosis using hybrid power, theoretical design matching calculation process also has been carried out. Additionally, economic was conducted. results show that...

In order to perform nano-manipulation more accurately, it is necessary study the relationship between scanning electron microscope (SEM) image and actual length. this paper, based on secondary image, displacement of 1.81nm in SEM was measured obtained according change pixels, so as realize nanometer calibration real-time measurement nano robot manipulator SEM. According magnification, resolution scale bar mapping pixels length established. The obvious feature point area were selected be...

The process of operating a micro-nano robotic manipulator in scanning electron microscope (SEM) to place carbon nanotube (CNT) on the surface nanodevice is very difficult. Not mention allowing learn its motor skills from demonstration placement task. In this paper, complex assembly task divided into multiple simple meta-tasks, each which for operation can be more easily learned. We identified AFM cantilever frame by template matching and calculated position coordinates obtain motion...

The nano robotic manipulators inside scanning electron microscopy (SEM) were developed to perform assemblies. However, it was challenging design path planners and controllers with real because difficult see the motion specimen chamber, what's more, crash caused by mismatching will result in great losses. To resolve issue of a low-cost inspection on planner, controller features, simulation analysis Nano Robotic Manipulator SEM chamber developed. kinematics described D-H formulation....

The task of picking-up carbon nanotube (CNT) by the atomic force microscope (AFM) cantilever in scanning electron (SEM) was divided into several meta-tasks this paper, and motor skills complete were learned from simple meta-tasks, so as to learn micro-nano robotic manipulator. Firstly, according motion characteristics working environment manipulator, a segmentation criterion established divide manipulation tasks different meta-tasks. Secondly, trajectories same multiple demonstration...

For precise prediction of the acoustic field distribution extracorporeal shock wave lithotripsy with an ellipsoid transducer, nonlinear spheroidal beam equations (SBE) are employed to model propagation in medium. To solve SBE frequency domain algorithm, boundary conditions obtained for monochromatic and sawtooth waves based on phase compensation. In numerical analysis, influence sinusoidal axial pressure distributions investigated.

Ink marking is a key process for die sorting of IC wafer manufacturing. Intensive production urging the inkers more rapid and stable ink performance on surface defective dies safely. In this paper, non-contact jetting dispenser introduced to marking. After presenting mathematical description dynamic fluid 2-phase flow, numerical simulations are launched reveal characteristics droplet generation factors discussed. A developed experimental results analyzed. According simulative dotting shown...

The mix rate of concrete has great influence on the strength concrete. At present, research method different is always mechanical rather than acoustical. Different rates have porosities in concretes and their linear nonlinear acoustic properties are also different. In this paper, porosity, such as sound velocity, harmonics, frequency shift samples compared. And we explore possibility using parameters to characterize

To reveal the jetting of fine drops, model 2-phase flow between gas and liquid is offered based on volume fluid method. Numerical simulation launched for droplet generation through narrow nozzle, key factors are discussed. Aiming at ink marking defective dies in IC production, a inker driven by piezoceramic stacks developed. The actuation properties derived; waveform induced pressure nozzle entrance estimated, which coincides numerical results. Performance dot evaluated results verified.