Abstract The instance segmentation of traffic targets in complex road scenes is one the most challenging tasks autonomous driving. Unlike bounding box localization for object detection and category perception mask semantic segmentation, requires accurate identification each under more precise positioning these target objects. Although has apparent advantages, methods, scenes, still need to be discovered. In this paper, we proposed an efficient method segmentation—YOLO (TTIS-YOLO) based on...

In order to study the mining pressure characteristics of shallow buried coal seam with same silo working face under very close void zone and overlying rock body, theoretical analysis is used determine whether open-cutting eye bearing layer belongs or not, based on numerical simulation FLAC3D on-site measurement resistance at end cycle face's hydraulic bracket, It proposed divide stress advancing length face, that is, high-pressure zone, transition low-pressure zone. The results show that:...

To reduce the operating cost and running time of demand responsive transit between urban rural areas, a DBSCAN K-means (DK-means) clustering algorithm, which is based on density-based spatial applications with noise (DBSCAN) was proposed to cluster pre-processing station optimization for passenger reservation design new variable-route service system that can promote urban–rural integration. Firstly, after preprocessing through algorithm used divide fixed sites alternative sites. Then, bus...

Introduction The evolution of nutritional strategies to improve the gut health and microbiota profiles early-weaned piglets is essential reduce diarrhoea caused by weaning stress. Therefore, aim this study was determine effects dietary supplementation Qi-Weng-Huangbo powder, a traditional herbal medicine consisting mixture Pulsatilla chinensis , Chinese Schneid Astragalus extracts (PCE), on growth performance, rate, immune function intestinal weaned piglets. Methods 162 were randomly...

To mitigate potential safety hazards during expressway operation, evaluation plays a crucial role. This study develops fuzzy comprehensive model to assess the of operations. First, an operation risk assessment index system consisting four criteria-layer indicators and 10 sub-criteria layer is established. Then, weight each calculated based on combined AHP entropy methods. Finally, level obtained by converting qualitative into sets defining corresponding membership functions describe their...

Due to imperfect design norms and guidelines for China's truck escape ramp, previous studies have not been able reflect the effect of wheel subsidence process on deceleration runaway vehicles. A discrete element method was used establish an aggregate a element. The three-dimensional model aggregate-wheel combination established based particle flow code in three dimensions software platform using "FISH" language. microscopic parameters particles were calibrated simulated static triaxial...

Introduction: Although the fall protection net installed at end of truck escape ramp has a protective effect on trucks and drivers, but lacks sufficient theoretical basis verification method. Objectives: The primary objective this paper was to design that meets regulations research its performance. Methods: finite-element method used overall size, material, mesh length, type, shape, supporting structure ramp, then dummy models were impact verify rationality design. After completed, model...

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A longitudinal platoon control method based on Twin Delayed Deep Deterministic Policy Gradient (TD3) and Model Predictive Control (MPC) is proposed to solve the problems of low following efficiency system instability in control. Firstly, Dynamic Bayesian Network (DBN) Long Short-Term Memory (LSTM) network are introduced identify driving behavior bystanders derive MPC objective constraint function containing three indicators following, comfort fuel consumption according dynamics equation....

This paper proposes an evaluation method based on a T-S fuzzy neural network for evaluating the speed grade of public-transport lines in context large-scale rail-transit planning and construction Hangzhou. The six-dimensional data morning peak/evening peak average speed, at peak, station distance, proportion dedicated lanes, nonlinear coefficients were selected as input to output operating bus lines. Improving optimizing membership function Takagi–Sugeno (T-S) model improves its predicted...

In this paper, the 14-equations of pipeline system were written as matrix forms in frequency domain with Laplace transformation and further solved by transfer method (TMM). Moreover, added mass damping models established combined TMM for decoupling investigated Turbulence-Induced Vibration (TIV) clamped-clamped pipe system. Firstly, feasibility analyzing responses water-filled pipelines free support boundary conditions mass, investigation TIV finished verify. Then Fluid-Structure Interaction...

Abstract This study was focused on Hangzhou in China that are undergoing large‐scale subway construction, and an improved momentum back‐propagation (BP) neural network model trained. The can analyze the complex traffic data, evaluate service quality of bus line, improve estimation accuracy convergence speed. For same training data set, time BP algorithm with term is reduced by 0.043 secs, iterative speed 0.66%, 26.7% compared standard algorithm. Under similar conditions, 1.562 secs less than...

To study the influence of road geometric parameters such as curve, superelevation, and slope on longitudinal lateral coordinated control an intelligent connected platoon, a cooperative system using velocity vehicle coupled variable motion is designed. The upper acceleration model car-following adopted improved driver to reflect behavior. This was combined with inverse dynamics realize speed-following guided vehicle. trajectory single-point preview in which distance follows coupling speed...

Abstract Road green logistics play a crucial role in promoting nation’s sustainable economic growth. Environmental regulation (ER) is considered as major activity to stimulate the development of logistics. Meanwhile, industry agglomeration (LIA) could enhance efficiency with reasonable agglomeration. However, contradiction between them also becoming important, and rapid has brought huge pressure on environment. Therefore, complicated relationship ER, LIA road efficiency(RGLE) needs be...