CNN-LSTM based architectures have played an important role in image captioning, but limited by the training efficiency and expression ability, researchers began to explore CNN-Transformer models achieved great success. Meanwhile, almost all recent works adopt Faster R-CNN as backbone encoder extract region-level features from given images. However, needs a pre-training on additional dataset, which divides captioning task into two stages limits its potential applications. In this paper, we...

Both the heat generated by current in write coil and rise surrounding temperature cause local thermal protrusion (TPR) on magnetic-head elements. Such reduces flying height of head slider below design value, thus reducing safety margin for head-disk interference. To analyze this problem, we numerically simulated transfer slider, deformation head, flying-height change resulting from deformation. The parameter study shows that decreasing thickness alumina base coat or increasing size pole...

Targeting both higher touchdown sensitivity and highly accurate nanometer-scale defect detection on a disk surface, thermal-contact sensor, integrated into magnetic-head slider, was developed. It experimentally shown that the contact sensor has for detecting head-disk at each radial position surface equivalent to of conventional acoustic-emission (AE) sensor. also defect-detection method using is feasible. Defect mapping, in which slider inspecting certain clearance detects small defects...

The fundamental performance of contact/clearance sensor, namely embedded contact sensor (ECS), is addressed in this paper. Both simulation and experiment results revealed that ECS a promising for low clearance high reliability at subnanometer regime. dc signal intrinsically comes from multiple sources including TFC heater, air-bearing surface cooling, friction heating head/disk contact. ac signals detect the resistance change due to contact, but dominated by spacing modulation caused...

In this paper, we propose a triple-stage actuator system with thermal to increase servo bandwidth of head-positioning control in hard disk drives. The is good for high frequency range because it has little negative impact caused by mechanical resonances. Therefore, the proposed can head position beyond major resonances voice coil motor (VCM) or piezoelectric (PZT) actuator. As result, be higher than that conventional dual-stage which consists VCM and PZT actuators. Simulation results...

A simulation method in which grooves are virtually distributed on the slider air bearing instead of grooved medium surface has been developed and used to investigate performance sliders flying over a discrete-track medium. The simulated height loss due coincides well with measured data, whereas average-estimation overestimates loss. Among characteristics that were studied attitude, effect groove parameters profile, losses manufacturing variation altitude. results indicate when is medium, it...

We have formed a micro-texture on pico-slider’s air-bearing surface to reduce the vibration when slider comes into contact with disk. The between and disk was controlled by adjusting ‘interference height.’ Our measurements show that, at giving interference height there is significant less in textured slider. This lower amplitude of attributed friction force, which turn due smaller area contact. also introduced concept found that it provides good explanation measured vibration.

The current design of magnetic disk head sliders needs two extra margins in flying height design: one for manufacturing tolerance and environmental variations. To reduce these margins, we have developed an adjustable slider. This slider carries a piezoelectric microactuator its can be controlled. After simulating the deflection characteristics, designed air-bearing surface fabricated it by silicon microelectromechanical systems processing. Several fabrication problems previously reported...

An increase in external temperature or internal heating by writing can induce protrusion strain of thin film layers a magnetic recording head. To profile the protrusion, surface topography and distribution are imaged fixed heads scanning probe optical microscopy. Near poles shields, is at peak, producing risk head-disk interaction. The dynamics elucidated flying over disk measuring amplitude reference pattern with read temporal profiling technique be applied both component testing on...

Perturbation and modal-analysis methods were employed to systematically study a damped slider’s dynamic characteristics, including an air-bearing stiffness, damping coefficient, frequency response translation wavy motion, natural frequencies, ratios, modal shape-node line. We found that design with grooves distributed on trailing pad effectively improved the ratio in second pitch mode; however, parametric studies revealed was dependent number of grooves, their depth, location, width, length,...

Currently, with the development of driving technologies, driverless vehicles gradually are becoming more and available. Therefore, there would be a long period time during which self-driving human-driven coexist. However, for mixed platoon, it is hard to control formation due existence manual resulting in weak robustness slow consensus rate on this system platoons because uncertainties caused by human factors vehicles. In order solve problem, we establish models types connected automated...

The mechanism of scratch-induced demagnetization was studied in perpendicular magnetic recording (PMR) disks. These scratches, which may occur on the disk's surface during head/disk contact, cause that results read/write errors. is thus investigated by scratch test, observation atomic force microscopy and microscopy, analysis transmission electronic microscopy. It found angle grain layer, vertically orientated a PMR disk, tilted under scratch. analyses revealed caused mainly plastic...

We investigated the mechanism of nanometer-depth scratches triggering adjacent track interference (ATI) by applying DC erasure magnetic fields to scratch areas in recording media and measuring demagnetization imaging bits using force microscopy. found that coercivity anisotropy (Ku) area is decreased about half compared a normal area. Section analysis layer under along transmission electron microscope revealed causes both c-axis tilt slip (0001) plane close-packed hexagonal lattice structure...