Abstract Graphene oxide (GO) has attracted considerable attention for biomedical applications such as drug delivery because of its two-dimensional structure, which provides a large surface area on both sides the nanosheet. Here, new method titanium (Ti) modification involving GO coating and aspirin (A) loading (A/Ti-GO) was developed, bioactive effects mouse osteoblastic MC3T3-E1 cells were preliminarily studied. The X-ray photoelectron spectrometry indicated C-O-N, C-Si-O-C, C-N=C bond...

A new CuNi/TiB2 thin-film thermocouple was fabricated using magnetron sputtering. 400 nm thick CuNi interior layer deposited on a dielectric substrate initiatory, and then covered by an 800 TiB2 layer. The tests revealed that the had dense columnar cross-section. measured hardness elastic modulus of were ~20.5 315.9 GPa, respectively. No cracking or delamination occurred at interface. work functions layers calculated to be 4.406 4.726 eV, difference in between ~0.3 eV. sensor exhibited high...

Based on empirical mode decomposition (EMD) and least squares support vector machine (LS-SVM), a new method is proposed to identify the flow pattern of gas-liquid two-phase in minichannel. Four patterns are observed three pipes with inner diameters 4.0, 3.1, 1.8 mm. For each pattern, capacitance signals obtained by two-electrode sensor. The EMD applied signal obtain intrinsic functions (IMFs) different characteristic time scales. IMF, autoregression (AR) model built extract multiscale...

The sound insulation performance of an electric vehicle’s body system serves as a critical metric for evaluating the noise, vibration, and harshness (NVH) quality vehicle. accurate efficient prediction is foundational undertaking noise reduction design optimization. Current engineering practices predominantly rely on Computer-Aided Engineering (CAE) methodologies to address this challenge. However, inherent shortcomings such low modeling efficiency difficulty in ensuring accuracy often...

In this paper, we firstly describe a facile method by which sequential attachment of different adhesion peptides to nanotopographical, self-assembled block copolymer cell culture surface is made possible through orthogonal click chemistry.

Phononic crystal is a new kind of sound insulation material, which has an elastic wave gap. When the falls within band gap, it will attenuate strongly in phononic crystal, and its attenuation degree far greater than predicted value mass density theorem. In this paper, practical application crystals low frequency taken as breakthrough point. Firstly, theory gap generation calculated analyzed, structure one-dimensional two-component Bragg scattering calculated. Hypermesh used to build model,...

Based on electrical capacitance tomography technique, a new method for the void fraction measurement of two-phase flow is proposed. A function system established, mathematical model image reconstruction developed. To obtain quantitative information flow, algorithm presented. The experimental results show that accuracy satisfactory. proposed suitable many kinds flow.

Image reconstruction of electrical resistance tomography (ERT) is an ill-posed inverse problem. In this work, a new image algorithm ERT for the measurement two-phase flow proposed. Tikhonov regularization principle introduced to overcome instability problem initial reconstruction. And, ART used improve quality original reconstructed image. Thus, hybrid and algebraic technique (ART) algorithm. Experimental results show that can efficiently superior sensitivity coefficient

Terahertz technique is a new measurement which has emerged in recent years. In this paper, the possibility of application terahertz to gas-solid two-phase flow been discussed. The research works are carried out on time-domain spectroscopy (THz-TDS) system and focus solids volume fraction with high concentration particles. Measurement models based transmission attenuation time delay studied compared. Research verify that may provide solution problem flow. Experimental results also indicate...

Wiper motor noise has an important impact on vehicle comfort. Accurate prediction of wiper can obtain NVH performance in manufacturing or earlier stage and provide necessary support for design parts vehicles. However, the accuracy by traditional CAE testing method is low. Data-driven technology provides a new idea with its advantages high efficiency precision. This paper studies algorithm based vibration signal, respectively, using transmission path analysis theory vector machine theory,...

Aiming at the formation control of multiple quadrotor unmanned aerial vehicles (UAVs), this paper proposes a strategy based on consensus theory:the communication topology UAV is constructed by graph theory, and directed used to represent interaction between individuals in cluster. A distributed controller designed, position track desired trajectory maintain specified formation, attitude stabilize each quadrotor. The simulation results verify effectiveness superiority designed paper.

In order to improve the accuracy of projectile impact point, trajectory correction method based on point prediction is studied in this paper. Firstly, for a kind with fixed canard rudder, principle two-dimensional (2D) technology described, and control process analyzed. Secondly, algorithm solving differential equation proposed, accurate deviation realized by 4D particle model. The system rudder designed algorithm. Finally, simulation model 7-DOF established, calculated Monte Carlo method....

High speed kinetic energy antitank missile is an important development direction of weapons in the future. Aiming at high-speed system with pulse correction engine as actuator and three-point guidance scheme, a trajectory optimization method lead-in phase designed, which can be applied engineering. Firstly, principle mathematical model are described detail. Then, scheme described, established. taking certain type example, verified analyzed by simulation. The real results show that designed...

To resolve the difficult control issue of intelligent new energy automobile in process vehicle control, study starts from motion mode and splits into two parts, transverse longitudinal control. Among them, speed is controlled by an improved adaptive PID model, while lateral angle dominated indistinct afterwards combined with for joint Finally, uses actual lane simulation to verify three perspectives respectively. It shows that are well realized model effect at 8km, 15km 20km per hour....

Hydrogen-free Al-DLC films were prepared by HiPIMS technology under different bias voltages through an Al-C composite target. Surface and cross-sectional morphologies, chemical composition, microphase structure bonding state, residual stress, hardness elastic modulus, friction coefficient wear resistance of investigated to study the influences substrate voltage. Results show that voltage decreased film roughness (Ra) from 3.83 nm 1.16 ion bombardment. The increase negative improved disorder...