Three-dimensional (3D) bioprinting combines biomaterials, cells and functional components into complex living tissues. Herein, we assembled function-control modules cell-laden scaffolds using 3D bioprinting. A customized printer was able to tune the microstructure of printed bone mesenchymal stem cell (BMSC)-laden methacrylamide gelatin at micrometer scale. For example, pore size adjusted 282 ± 32 μm 363 60 μm. To match requirements printing nozzle, collagen microfibers with a length 22 13...

Time domain features of slow potentials (≦2 Hz) during periodic movement and motor imagery at fast (4 Hz 2 were investigated in 4 healthy subjects by event-related the paper. EEG was recorded from 64 electrodes 9 closely spaced overlaying left right sensorimotor area analyzed. The performed 40 (paced metronome) six tasks that involved three limbs (left index fingers toes) first-person perspective. In addition, also arms feet third-person Based on brain processing mainly with imagery,...

This paper is concerned with characteristics of human behaviors in Internet-based teleoperation system under communication delay. Especially frequency character and velocity affected random delay the Internet are analyzed. We researching adaptive network mechatronics which can not only evaluate operational human, but also help operator's control according to evaluation operations system. The analysis by will provide us helpful regulations design methods mechatronics. develop an experimental...

The purpose of this paper is to provide a review recent developments in Flapping-wing Micro Air Vehicles (FMAV) Asia past few years. discusses Asian research the development FMAV and summarizes two major strands divided by insect-like FMAVs bird-like FMAVs. Also developing status proposes future focus, trends application prospects.

The variable time delay and the packet loss degrade performance of Internet based teleoperation system seriously, even make unstable. Building upon results our recent work in, a provably stable event-prediction control strategy is proposed for teleoperation. A Path Governor(PG) at master site, Generalized Predictive Controller (GPC) slave site model within predictive frame are used to improve response transparence. Sparse Multivariable Linear Regression (SMLR) algorithm predict next Round...

We introduce a new motor parameter imagery paradigm using clench speed and force imagery. The time-frequency-phase features are extracted from mu rhythm beta rhythms, the optimized three process methods: no-scaled feature “MIFS” selection criterion, scaled “mRMR” criterion. Support vector machines (SVMs) extreme learning (ELMs) compared for classification between feature. Our results show that no significant difference in rate SVMs ELMs is found. combinations can get higher accuracy than at...

With the development of methods and skills minimally invasive surgeries, equipments for doctors' training practicing are in high demands. Especially cardiovascular operators requested to be familiar with surgical environment a beating heart. In this paper, we present new dynamic cardiac simulator utilizing pneumatic artificial muscle realize heartbeat. It's an left ventricular which inner chamber is made thermoplastic elastomers (TPE) anatomical structure real human It covered by another...

The neuronal networks are considered as the origin of intelligence in organisms. In this paper, a new hybrid neurorobot system merging biological to artificial was created. It based on controller bi-directionally connected an actual mobile robot implementing novel vehicle which aimed at searching objects. modified software architecture and home-made stimulation generator were employed support bi-directional exchange information between part by means simple binomial coding/decoding schemes....

This paper presents a novel capsule endoscope with the synchronous acquisition of image and pH in gastrointestinal (GI) tract. Due to advantages size response time, antimony Ag/AgCl electrodes were used as working reference sensor respectively. Three prototypes designed fabricated. The first two sensors adopted separated different size, while last integrated ones, which was smallest length 5mm diameter 6.7mm. linearity, accuracy, time temperature drift three measured assess their...

In this paper a novel model predictive control (MPC) approach is proposed based on mixed-H2/H∞ for space teleoperation systems with unknown, large time-varying delays and input constraints. This only measures the online delay; it does not presume delay bounds. addition, H∞ has been incorporated into original MPC, which compensates delays, handles constraints, provides desired tracking performance. First, system built type of architecture then converted discrete state-space equation. Next,...

This paper presents a preliminary design of miniature force sensor for the cardiac catheter to detect contact between catheter-tip and myocardial tissue. A spring-like elastic part was specially designed transform distal micro deformation. An optical fiber assembled behind deformation by analyzing reflective light intensity. The concise structure force-deformation transferring usage standard material greatly promise low-cost sensor. experimental results indicate works with fairly good...

Prior researches of generalized predictive control (GPC) in teleoperation systems have mainly considered short transmitted time delays or single degree freedom (DOF) manipulators master and slave. This paper presents a GPC strategy for space which the slave are both multi-DOF communication network brings long time-varying delays. The nonlinear dynamics manipulator is linearized described by linear state-space equation. Meanwhile, compensator used to compensate parts Then, based on equation,...

In this study, we propose a one-branch IncepTAE network to extract local and global hybrid temporal attention simultaneously congruously for fine-grained satellite image time series (SITS) classification. Transformer the self-attention mechanism have been research focus of SITS classification in recent years. However, its effectiveness seems diminish scenario among similar categories, example, different crop types. Theoretically, most existing methods on only one type attention, either or...

In virtual reality (VR)-based telerobotic systems, system performance depends highly on the accuracy of model constructed at master site. However, state errors between and slave exist inevitably due to unknown environment parameters random time delay communication media. A popular strategy tackle problem is by means technology, in which impedance estimated site transmitted recreated as a site, then, updated fly according from As distinct existing parameter estimation methods, this article...

Robotic assisted gastroscope delivery could solve various problems like understaffing, radiation and infection risk. The friction rollers commonly used in the few existed systems for traditional flexible endoscope, however, has potential risk of destroying scopes non-uniform clamping. This research develops a novel intervention mechanism (GIM) with specially designed airbag. It evenly clamps circumferential uniform pneumatic pressure. GIM realizes axial radial motion by means relay mode...

The development of human-robot cooperation and the demand high-precision robot control have increasingly spurred usage joint torque sensors. A build-in sensor for harmonic drive is researched in this paper, which utilizes strain gauges attached to surface flexspline measure torque. As signal significantly affected by rotation wave generator, positioning error uneven distribution load torque, a new sensing technique with on-line estimation developed eliminate disturbance achieve better...

Human upright postural control is highly related to visual information. In order investigate the influence of feedback on static control, sway eight healthy adults was investigated under circumstances. investigation, information visualized by an indicator composed a movable spot and stationary circle, subjects inspected both in time domain frequency domain. The experiment results indicate that reduction scale inspires power shift higher frequencies, this also induces fall-after-rise pattern...