The further electrification of various fields in production and daily life makes it a topic worthy exploration to improve the performance capacitors for long time, including thin-film capacitors. discharge energy density that serves as one important types directly depends on electric field strength dielectric constant insulation material. However, has been great challenge breakdown simultaneously. Considering boron nitride nanosheets (BNNS) possess superior thermal conductivity owing wide...

The ideal intrinsic barriers to domain switching in c-phase PbTiO_3 (PTO), PbZrO_3 (PZO), and PbZr_{1-x}Ti_xO_3 (PZT) are investigated via first-principles computational methods. effects of epitaxial strain on the atomic structure, ferroelectric response, barrier coherent reversal, domain-wall energy, translation studied. It is found that PTO has a larger polarization, but smaller energy than PZO. Consequentially idealized coercive field over two times Ti--O bond length more sensitive other...

Bismuth-based perovskite derivatives, (CH3NH3)3Bi2I9 (MBI), are promising non-toxic light-absorbing materials widely used in various photoelectric devices because of their excellent stability. However, MBI-based solar cells (PSCs) limited by poor film quality, and the performance such a device is far behind that lead-based PSCs. In this work, crystal structure morphological properties MBI films were compared across different preparation methods. The two-step vapor-assisted method can prepare...

Maintaining high charge/discharge efficiency while enhancing discharged energy density is crucial for storage dielectric films applied in electrostatic capacitors. Here, a nano-submicron structural film comprising ferroelectric material P(VDF-HFP) and linear PMMA has been flexibly designed via the electrospinning process. Nano-submicron structure enables to maximize component obtain improved performance without sacrificing breakdown strength efficiency. As result, 40%-420 nm...

In this paper we describe the design of a new bio-inspired amphibian robot with high environmental adaptability. The robot, called MiniTurtle-I, can transform terrestrial and aquatic locomotion configurations through variable topology mechanism (Leg-Flipper). Based on modular philosophy, four rotatory joint modules (Joints I–IV) constitute Leg-Flipper module. Variable structure transformation by actuation redundancy enables to achieve variety locomotion. Our motivation is provide another...

Demands for increased wireline data throughput necessitate multi-gigahertz clock sources of ever-greater fidelity. This article demonstrates a 14-GHz bang-bang digital phase-locked loop (BBPLL) with 143-fs rms jitter (integrated from 1 kHz to 100 MHz) 56-Gb/s PAM-4 transceiver. The low is achieved an LC-based digitally controlled oscillator (DCO) having tuning range 2 GHz, frequency resolution 1.2 MHz/LSB, and phase noise -104 dBc/Hz at 1-MHz offset. All PLL functions are consolidated in...

Traditional beamforming (BF) methods can be used to suppress the Gaussian interferers in underwater acoustic communication systems. However, multiple unsteady sub-Gaussian may exist that degrade performance of BF. In this paper, a new beamformer is proposed for suppression (SMUSGI). The BF combines multiplier and quasi-Newton obtain optimal weight vector. Simulation experiments are conducted validate beamformer. addition, compared with traditional including MVDR, Subspace, Bartlett, MDDR,...

A hybrid optical-acoustic underwater wireless sensor network (OA-UWSN) was proposed to solve the problem of high-speed transmission real-time video and images in marine information detection. This paper proposes a novel energy-efficient contention-based media access control (MAC) protocol (OA-CMAC) for OA-UWSN. Based on fusion technology, our OA-CMAC combines postponed mechanism carrier sense multiple with collision avoidance (CSMA/CA) multiplexing-based spatial division (SDMA) technology...

We present a biologically plausible dynamics model to simulate swarms of flying insects. Our formulation, which is based on biological conclusions and experimental observations, designed large insect varying densities. use hybrid formulation that combines force-based capture different interactions between the insects with data-driven noise model, computes collision-free trajectories. introduce quantitative metric evaluate accuracy such multi-agent systems inherent noise. highlight...

Abstract Collective behaviour of winged insects is a wondrous and familiar phenomenon in the real world. In this paper, we introduce highly efficient field‐based approach to simulate various insect swarms. Its core idea construct smooth yet noise‐aware governing velocity field that can be further decomposed into two sub‐fields: (i) divergence‐free curl‐noise model noise‐induced movements individual swarm, (ii) an enhanced global control navigational paths complex environment along which all...

Visual dirt detection is becoming an important capability of modern professional cleaning robots both for optimizing their wet results and facilitating demand-oriented daily vacuum cleaning. This paper presents a robust, fast, reliable office item system these tasks based on adapted YOLOv3 framework. Its superiority over state-of-the-art systems demonstrated in several experiments. The furthermore features dataset generator creating any number realistic training images from small set real...

Bioprinting, a technology that allows depositing living cells and biomaterials together into complex tissue architecture with desired pattern, becomes revolutionary for fabrication of engineered constructs. Previously, we have demonstrated EphrinB2-modified dental pulp stem (DPSCs) are expected to be promising seed enhanced osteogenic differentiation capability alveolar bone regeneration. In this study, aimed bioprint EphrinB2-overexpressing DPSCs low-concentrated Gelatin methacrylate...

In this article, a novel two-phase transmission protocol is proposed to help the bidirectional in user-aid two-way cooperative nonorthogonal multiple access system, where superposition coding, bit-level Exclusive-Or operation, and successive interference cancellation (SIC) techniques are employed for improving spectrum efficiency throughput. Considering residual generated practice process of decoding, both perfect SIC imperfect scenarios discussed. Besides, power allocation factor...

A differential quadrature amplitude modulation (QAM) scheme for uplink massive multiple-input-multiple-output systems was recently proposed; this outperformed the conventional amplitude-phase shift keying (APSK) 1000 receiver antennas. However, detectors of these schemes are different, and QAM detector suffers from error floors if number antennas is not sufficiently large. In letter, we generalize propose a new that presents better performance at low bit rates when available extremely We...