An optimal tracking control problem is critical for marine surface vessels (MSVs) with full state constraints, input external disturbances, and model uncertainty terms. For solving an MSV's position velocity a barrier Lyapunov function (BLF) (CBF) are introduced combined prescribed performance functions, then, adaptive dynamic programming (ADP) optimized strategy presented based on the two functions. A event-triggered mechanism employed, which reduces number of triggers by intermittent...

A collision-free and connectivity-preserving formation control issue is addressed for a class of nonlinear multi-agent systems (MASs) with external disturbances. The objective this paper divided into two aspects. One collision avoidance connectivity preservation among leader communication-connected followers, the other obstacle between followers potential obstacles including environmental communication-connectionless followers. tangent-type error transformation function introduced first...

Time series forecasting is emerging as one of the most important branches big data analysis. However, traditional time models can not effectively extract good enough sequence features and often result in poor accuracy. In this paper, a novel model, named SeriesNet, which fully learn different interval lengths. The SeriesNet consists two networks. LSTM network aims to holistic reduce dimensionality multi-conditional data, dilated causal convolution interval. This model multi-range multi-level...

For marine surface vessel with input saturation, model uncertainties, and unknown disturbances, this article proposes a path-following control collision avoidance method based on error-constrained event-triggered switching line-of-sight guidance. This can autonomously switch between modes, constrain the position heading errors to satisfy safe navigation in confined waters, reduce computational frequency of controller mechanical wear actuator. In mode, we construct an asymmetric modified...

In recent 20 years, artificial neural network has attained amazing achievement in very wide fields, and neuron models are the bases of success. This article classifies presented researches on China to 7 types reviews them. Furthermore, future research directs were prospected.

Marine engineering English teaching and learning circumstances in Chinese universities is still quite confined with textbooks teacher dominant classes, lacking of diversified methods can stimulate learners' passions interests. The lack relevant multi-modal information visualization tools make it hard for learners to learn marine English. Therefore, we constructed optimized three dimensional engine models based on virtual reality technology, applied force feedback technology realize the...

To improve the following performance in large curve path and time-varying drift angle, a reduced-order extended state observer is added to Improved Stanley Guidance Law (EISGL). Combining with dynamic surface control (DSC), an adaptive auxiliary system simultaneously built compensate for effect of constraints on system. A barrier Lyapunov function combined prescribed designed constrain heading angle error following. Adaptive laws are also approximate errors, estimating perturbation poor sea...

Localization of people and machine is important for underground substations. However, conventional global navigation satellite system (GNSS) cannot work in such situation. Other localization technologies as WiFi RFID perform poorly substations due to the influence environment, e.g. blockage walls, congestion space, complexity environment. Moreover, an additional communication also required collect information from deployed anchors, which leads more cost. To solve problem substations,...

Based on Nomoto's equation for ship steering system, a state of the system was constructed, in which uncertainties were concerned. For robust control algorithm proposed according to upper bounds uncertainties. Applying Lyapunov stability theory and linear matrix inequality method, we proved that approach can guarantee global closed loop lead tracking error small bounded neighborhood zero. Furthermore, an adaptive put forward with biological immune improve adaptability system. To reduce...

There are lots of limitations in ship oil purifier practical training system.Most the simulation system is given priority to hardware and it isn't convenient use.For this purpose, it's necessary design a software platform help students master application system.The article uses COS CO PACIFIC thousands container as object.By using VC++ technology simulate operation function, established mathematical model, realized control unit EPC50 logic designed interface.Through operating proposed...

Part of self-service check-in systems in China are designed without taking user-centered design methods and guidelines into account. According to our research conducted at two airports China, many users not satisfied, some even frustrated give up using system. This significantly increases staff's working load leads great waste resources. Therefore, redesigning the current problematic system based on becomes crucial order improve usability enhance user experience. In this paper, distributed...

The traditional single-layer latex balloon (SLB) is difficult to float at high altitude. To improve the level of meteorological observation, a new and easy-to-implement double-layer (DLB) system was proposed solve high-altitude floating problem in this work. amount hydrogen critical for DLB system, but it control precisely. Therefore, thermal model structure developed calculating heat source during ascent phase system. geometric, atmospheric, dynamic also so that its vertical trajectory...

A notion of logic time and stamp are introduced to control running order for single-period multi-periods simulation system. Then a synchronous startup schedule strategy is designed, its technology essential implementation flow discussed. According the interactive data, measurement compensation method time-delay in proposed. Finally, designed has been successfully applied ship motion distributed virtual

Multi-station integration is an important foundation for the construction of power Internet Things and support achieving low-carbon development. The variety modes discussed, in-depth analysis whole-site monitoring technology under multi-station scenarios, including data characteristic analysis, system architecture design, information model, edge computing processing, main plant service application. pilot project presented, it can provide guidance reference unified whole station station,...

Overhead lines are an important task of power engineering construction, and they often face the problems platform tilt passing through pulley grooves. We have proposed a set intelligent line monitoring system, which is mainly used for detection trolley threading balance state board during high-voltage line. propose to use improved RCF (Richer Convolutional Features Edge Detection) algorithm identify wire on groove determine whether it has out-of-bounds fault. Our practical engineering. The...