Abstract Multiwalled carbon nanotubes (MWNTs) and ultrahigh molecular weight polyethylene (UHMWPE) composites are prepared using paraffin as solvent. The resulting electrical properties show lower percolation threshold, which is 1.4 vol %, than that of UHMWPE‐MWNT by gelation/crystallization from decalin solution. Good reproducibility higher maximum conductivity obtained. extremely low threshold indicates the dispersion MWNTs segregated, can be proved morphology film observed optical...

Abstract Carbon fiber (CF) filled low‐molecular‐weight polyethylene (LMWPE) and ultra‐high molecular weight (UHMWPE) composites were prepared by the gelation from solution kneading in melting state. The content of carbon fibers was fixed to be 23.5 vol %. resistivity, positive temperature coefficient (PTC), dielectric behaviors became more pronounced with increasing LMWPE much higher thermal expansion than that UHMWPE. PTC effect most significant, when blend ratio UHMWPE 9/1. Beyond 9/1,...

In this paper, the photocatalytic properties of W-doped monoclinic BiVO 4 were studied by CASTEP MS-5.5 software under PWPP based on density function theory (DFT). The results showed that band gap narrowed and absorption edge red shifted after 5d atomic orbit W mixing into valence crystallites, which could effectively improve activity crystallites. calculated also implied crystallites be improved doping transition metal with orbital.

Introduce a new type of non-adhesion braking mode - aerodynamic braking; Meanwhile we analyze the structure wind resistance brake mechanism. Based on commercial software Fluent, numeric simulation are applied to flow field high speed train with mechanism in order work out pressure distribution law wing plate and as well resistance. finite element theory, model is built by ANSYS. Then make static load analysis modal From computation above get some good conclusions.

Abstract Unusual phenomenon was confirmed in the gelation of polymer solution when branched low molecular weight polyethylene (B‐LMWPE) and ultrahigh (UHMWPE) solutions were quenched at their temperature. That is, polarized light scattering (Hv scattering) from B‐LMWPE gels containing 95% solvent yielded a four‐leaf clover type as like perfect spherulite under Hv but corresponding optical microscopy (POM) showed dark image showing no with Maltese cross color indicating considerable...

To solve the braking problems caused by train speed-raising, shorten distance and avoid probable wheel sliding arising therefrom, we launch a research into Aerodynamic Brake design an aerodynamic brake mechanism, wing plate of which can open close bilaterally against wind with opening angle controllable. Kinematic analysis optimization using ADAMS are done in order to reduce driving force obtain more reasonable structural parameters. Research this mechanism may provide important referential...

Auto-feeding soup machine based on six-bar linkage, which is a kind of feeder mechanism in die casting industry, simulated and optimized this paper. By kinematic analysis the design variables constraints are determined, objective function mathematical optimization model established, that to pursue minimum extreme value acceleration ladle motion as object. The linkage's parameters by using software ADAMS set relatively reasonable configurable obtained. Meanwhile, such method can be applied...

The high resolution range profiles (HRRPs) of different polarimetric channels can enhance the recognition performance. Few existing methods focus on combining structure information with correlation between channels. In this paper, we applied ConvLSTM to HRRP target recognition. be used combine due convolution operation and feedback mechanism. HRRPs from are regarded as sequential inputs in ConvLSTM. extract mechanism exploit experimental results demonstrate that method based outperforms...

Generative design is a exploration technology based on an artificial intelligence algorithm. By constraining the manufacturing process and product performance requirements, generative can generate variety of feasible models in cloud computing. In this paper, according to load condition roller seat wind turbine blade turnover machine, several that meet requirements are generated by using design. After analyzing comparing models, best model obtained. Next, structural strength stiffness new...

This paper analyses the sparsity of SAR signal under multi-antenna observation structure. Based on continuous scene spectrum and target scene, a down-sampling method is proposed side-looking 3D imaging cross-track sparse array investigated. Imaging results simulation real data are given to verify method.

Abstract Entanglement in macroscopic systems, as a fundamental quantum resource, has been utilized to propel the advancement of technology and probe boundary between classical realms. This study focuses on unique hybrid system comprising an ensemble silicon vacancy (SiV) centers coupled phononic waveguides diamond via strain interactions. By employing two sets time-dependent, non-overlapping driving fields, we investigate generation process dynamic properties entanglement, providing fresh...

<title>Abstract</title> This paper presents the design of a servo control system for flexible endoscope surgical robots. For with certain degree uncertainty, an Radial Basis Function (RBF) neural network adaptive Proportional-Integral-Derivative (PID) algorithm is proposed. fully utilizes adaptivity, self-learning ability, and excellent nonlinear approximation ability RBF to achieve real-time online adjustment PID. We developed mathematical model transfer function conducted detailed...

In the design of Erbium Doped Fiber Amplifier (EDFA), improving flat-gain has great important significance. The working principle and gain characteristics EDFA are introduced briefly, influence factors such as doped fiber (EDF) length pump power on is analyzed in detail, simulation experiments were carried out with Optisystem software. result shows that, when constant, EDF departing optimal value, each channel decreases at different degrees; changes degrees. Moreover, Er³⁺...