ABSTRACT With the rapid development of UAV technology, demand for detecting changes in targets during low‐altitude inspections is increasing. In inspection scenarios, natural account a much larger proportion than unnatural changes. Unsupervised change detection based on statistical and clustering algorithms often results false detections more prevalent changes, leading to decreased accuracy. To address this issue, paper proposes model (LPCD) style transfer. The extracts features through an...

In view of the research status and existing problems synthetic aperture radar (SAR) target recognition, a new method deep learning fusion recognition is proposed. Firstly, 1-D features extracted with principle component analysis(PCA) are used as input stacked autoencoder(SAE) network to extract features, which achieves based on PCA feature data. Then, SAR images convolutional neural network(CNN) 2-D image Finally, algorithm decision-level feature-level proposed for diferent kinds The...

This paper presents a non-linear dynamic model of combined heat and power (CHP) unit with two-stage bypass for the first time. is derived through an analysis material energy balance CHP unit. The static parameters are determined via design data unit, refer to same type units in other references. Based on model, optimized control scheme coordination system proposed. introduces stair-like feedforward-feedback predictive algorithm solve problem large delays boiler combustion, integrates...

With the increasing number of electric vehicles, harmonic pollution vehicle charging stations is becoming more and serious. It great significance to analyze control harmonics generated during process vehicles. This paper builds a complete charger (station) model explore effects chargers, power charger, initial SOC state on harmonics. Then APF introduced suppress The method adopts combined strategy PI repetitive control. simulation results verify effectiveness proposed method.

In deep neural networks, the activation function is an important component. The most popular functions at moment are Sigmoid, Sin, rectified linear unit (ReLU), and some variants of ReLU. However, each them has its own weakness. To improve network fitting generalization ability, a new function, TSin, designed. basic design idea for TSin to rotate Sin 45° counterclockwise then finetune it give multiple better properties needed as such nonlinearity, global differentiability, unsaturated...

To improve the performance of tracking and intercepting low-altitude target, a nonlinear integral sliding mode guidance law is designed firstly, which can guarantee that line-of-sight angle converges to desired angular rate zero in finite time. Meanwhile, solve chattering problem caused by high gain coefficient sign function law, disturbance observer estimate maneuvering acceleration target. Moreover, composite introducing estimated value acceleration, weaken phenomenon effectively. Finally,...

The wearable power assist leg (WPAL) has been developed with the goal of decreasing human inner force / increasing strength during walking in daily life for special groups, such as old and disabled. This paper summarizes mechanical design using Ergonomics analyses dynamic characteristic exoskeleton robot considering friction impact joints. According to model muscle-bone, a control strategy mainly based on human-robot interaction between is proposed. WPAL expected have significant effect many...

This paper analyses the attitude measured model and presents determination algorithm of space TT&C ship (space tracking, telemetry, command ship) based on single star sensor. Considering lower precision rolling angel for sensor, we proposed an by integrating redundancy measure to obtain high data. Aiming at circumstance ship, factors that influence data such as number star, atmosphere refraction correct installation elevation are analyzed, which this can provide valuable references...

Abstract. Location-Based Services (LBS) have attracted growing attention in recent years, especially indoor environments. The fundamental technique of LBS is the map building for unknown environments, this also named as simultaneous localization and mapping (SLAM) robotic society. In paper, we propose a novel approach SLAMin dynamic scenes based on 2D laser scanner mounted mobile Unmanned Ground Vehicle (UGV) with help grid-based occupancy likelihood map. Instead applying scan matching two...

In this paper, a novel cell cooperation-based scheme is proposed as means of energy saving in an overlapped coverage area several cells. Different from the existing singlecell serving mode, our proposal utilizes virtual clustering (VCC) technique, which aggregates spare bandwidth all adjacent cells, to reduce consumption while satisfying service requirement simultaneously. For maximum gain, partition procedure then introduced with optimization problem modeled scenarios under consideration....

Abstract Coal-fired power plants are undergoing ultra-low emission retrofits. When the flue structure of SCR denitrification system existing unit is fixed, internal baffles and static mixers need to be optimized ensure flow field uniformity, thus ensuring efficiency controlling ammonia escape rate. For a 660 MW system, numerical simulation gas uniformity cold state test physical model were carried out. The results show that distribution mixing effect in effectively improved by adding...

The vibration signal of a rotor bearing system is usually nonlinear and non-stationary. Fourier transform hard to analyze these signals. A new method based upon empirical mode decomposition (EMD) Hilbert spectrum proposed for fault diagnosis roller bearings. We get signals from 6205-type ball bearings with inner-race faults outer-race faults, then analyzing its local marginal spectrum. Comparing the results theory value, we can diagnose rotary machinery fault. In this study, find that are...

In order to improve the trajectory tracking control performance of three-links spatial robot, a new sliding mode method with low-pass filter is proposed in this paper. Due Fast response speed and invariant system parameter perturbation external disturbance uncertainties, traditional can assure asymptotic stability system, but its disadvantage that itself will cause strong chattering. Therefore, low pass introduced on base method, law guarantee fast convergence error as well robustness for...

Traffic emission is one of the main pollution sources urban atmospheric environment. control scheme intersection has important influence on vehicle emission. Research low traffic signal become focuses Intelligent Transportation. Current typical methods are based optimizing average delay and number stops. However, it extremely difficult to use mathematical formula calculate stops in presence initial queue length intersection. In order solve this problem, we proposed a algorithm reinforcement...

A simple systematic calibration method based on acceleration and angular rate measurements is introduced for the fiber-optic gyro strapdown inertial navigation system in this paper. Meanwhile, a unified mathematical framework an iterative calculation are designed method. Using method, one can estimate measurement unit (FOG IMU) parameters both at manufacturer’s facility field. In order to get all FOG IMU parameters, procedure adopted approach consists of two stages: First, raw data...

Traditional Static Synchronous Compensator(STATCOM ) compensates most singly for reactive power or steady state voltage in high field. On this point, the paper puts forward a harmonic frequency compensation technique, which can realize dynamic as well control of less than 20th power. Then, using average switching method, it gives mathematical model on device. Active and current decoupling is realized. For electrical model, compensator developed uses 8-cascaded H bridge structure, together...

To effectively intercept a low‐altitude target in clutter background, nonsingular fast terminal sliding mode guidance law is designed. The designed can fully exploit the convergence characteristics of linear control and finite‐time‐convergent to ensure that line‐of‐sight (LOS) angle converges desired limited time at faster rate. Utilizing smooth switching hyperbolic tangent function similar saturation function, differentiator Meanwhile, new disturbance observer on tracking track ideal LOS...