Abstract In order to further improve the flight stability of explosively formed projectile, formation method tail EFP was studied based on polygonal liner. Under hexagonal charge structure, fins can be when structural parameters are matched. Through numerical simulation LS-DYNA, influence liner (curvature radius, linear thickness), height and shell thickness velocity, length-diameter ratio, com...

Abstract Ceramic materials are widely used in the field of armor protection because high hardness and low-density. In order to research ballistic performance Si 3 N 4 ceramic evaluate penetration effect, DOP test against 12.7 mm API was carried out. The results show that coefficient is range 1.85-4.26, thickness 1.85-4.26. On this basis, numerical simulation technology composite studied by usin...

PURPOSE The aim of our study was to determine whether using C-arm CT (DYNA CT) during hepatic arteriography imaging assists in TACE treatment. MATERIALS AND METHODS 138 patients with HCC, 69 patients (Group A) underwent DYNA CT and routine digital subtraction angiography (DSA), while another 69 patients (Group B) underwent only DSA, were prospectively studied at a single facility between May ...

In order to study the similarity law of penetration concrete targets by shaped charges, tests with different sizes shaped-charge jets were carried out, and prototype model projectiles met a simulation ratio 1:1.5. LS-DYNA finite element software was used simulate tests, accuracy ALE algorithm, fluid–solid coupling material model, equation state, corresponding parameters verified. Numerical simu...

In this paper we introduce a multi-step linear Dyna-style planning algorithm. The key element of the multi-step linear Dyna is a multi-step linear model that enables multi-step projection of a sampled feature and multi-step planning based on the simulated multi-step transition experience. We propose two multi-step linear models. The first iterates the one-step linear model, but is generally com...

In this retrospective study, we aimed to examine the effect of applying Dyna computed tomography (CT) on the success rate of adrenal venous sampling (AVS) without adrenocorticotropic hormone stimulation. A total of 100 consecutive patients with primary aldosteronism who underwent AVS between May 2012 and July 2015 were enrolled. In all the cases, Dyna CT was used in AVS to validate catheter pos...

Blasting lumpiness prediction is one of the most important research contents in engineering blasting. Although traditional KUZ-RAM model widely used, it often overestimates size Therefore, was updated or corrected this paper by simplifying difficult problem statistical burst fragmentation LS-DYNA. Based on theory area measurement method, fitting mechanism machine learning used to study simulati...

This paper presents a reinforcement learning (RL)–based energy management strategy for a hybrid electric tracked vehicle. A control-oriented model of the powertrain and vehicle dynamics is first established. According to the sample information of the experimental driving schedule, statistical characteristics at various velocities are determined by extracting the transition probability matrix of...