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In view of the shortcoming that the traditional video monitoring device is inconvenient to move, in this paper, we take the tracked intelligent vehicle as the research object and design a mobile video monitoring system based on Android. The system collects the video information of the environment around the intelligent vehicle through the camera and then transmits the video information to the Android...
In this paper, based on quaternion and Euler angles, an attitude control algorithm is proposed for pitching and rolling of quadrotor aircraft. In addition, the target tracking algorithm of quadrotor aircraft is designed by using the collected video information and color feature recognition. The system is based on the homemade quadrotor aircraft, using gyroscope, accelerometer as the original measurement...
Aiming at the task of autonomous search and target capture for the intelligent vehicle, in this paper, the intelligent vehicle with a four-degree-of-freedom manipulator was taken as the research object. Firstly, the D-H (Denavit-Hartenberg Matrix) method is utilized to construct a model of the manipulator by MATLAB, and a method is given to calculate the analytical solution of the angle of manipulator...
Wind generation forecast approaches are typically based on fixed model structures, which might fit well with existing data but fall short in forecasting out-of-sample data. The reason lies in that predetermined models cannot always capture the actual dynamic features of wind farms, resulting in unavoidable model errors. In this paper, a novel ultra-short-term wind generation forecast approach based...
In Bike-Sharing System (BSS), great efforts have been devoted to performing resources prediction, redistribution and trip planning to alleviate the unbalance of resources and inconvenience of bike utilization caused by the explosion of users. However, there is few work in trip planning noticing that the complete trip composes of three segments: from user's start point to a start station, from the...
In this study, quadrotor vertical taking off and landing (VTOL) control problem of a quadrotor is investigated. A control strategy which has an inner-outer loop structure is proposed. A backstepping based controller is designed for the outer loop to fulfill position tracking aim. The inner loop is regarded as a nominal system with lumped disturbances which contains parameter perturbations, external...
With the Internet applications become more complex and diverse, simple network traffic matrix estimation or approximation methods such as gravity model are no longer adequate. In this paper, we advocate a novel approach of approximating traffic matrices with multiple low-rank matrices. We build the theory behind the MULTI-LOW-RANK approximation and discuss the conditions under which it is better than...
This paper introduces two well-accepted path-following control methods, namely Vector Field Method (VF) and Line-Of-Sight Method (LOS) for Unmanned Surface Vehicles (USVs). We provide a comprehensive study of each algorithm, which includes investigating their mathematical origins, performing simulation evaluations and carrying out real-world field tests in adverse weather conditions. We compare different...
Metabolomic data analysis presents a unique opportunity to advance our understanding of osteosarcoma, a common bone malignancy for which genomic and proteomic studies have enjoyed limited success. One of the major goals of metabolomic studies is to classify osteosarcoma in early stages, which is required for metastasectomy treatment. In this paper we subject our metabolomic data on osteosarcoma patients...
The electric vehicle parameters collected by timesharing lease management platform have been accumulated increasingly, which has laid a firm foundation for large data analysis. Pretreatment technology plays an important role in the process of data acquisition. In particular, there is a risk of intervention in the process of transmitting monitoring data between two platforms. Therefore, this paper...
Multi-class classification algorithm of support vector machine (SVM) has always been a research hotspot. A new multi-class SVM algorithm, naming recall reordering adaptive directed acyclic graphs (RRADAG), is proposed from the perspective of error detection to solve the error accumulation existed in multi-class SVM algorithm of which is based on Directed Acyclic Graphs (DAG). By detecting the output...
The interoperability test between electric vehicle and charging equipment plays an important role on the popularization and application of electric vehicles. The principle of control pilot circuit of charging equipment is introduced firstly. Based on new national standard and the new charging interoperability test specification, the interoperability testing device of A.C. charging spot is designed...
Organizations face with continuously changing external environments. Those external changes are characterized by the uncertainty which can be categorized according to its source or its type. This study reviews the construct of environmental uncertainty in previous studies and investigates the relationship between the organizational context and the development of dynamic capabilities. In fact the environmental...
with the national new energy strategy periodically adjusting and continuously advancing, the construction of electric vehicles charging infrastructure getting increasingly closing, the problem of power supply capacity prediction that the social users in some region use it to charge their electric vehicles is the key issue that affects the power grid construction. In this paper, a forecasting method...
This paper considers the state estimation of Markovian jump linear systems with random parameters and estimate feedback. The state estimate at the previous epoch is introduced into the dynamical model to depict some phenomena that the system evolvement may depend on the most recent estimate. Then, the linear minimum mean square error estimator is derived for the considered system. A filtering framework...
Many ocean survey missions require an Unmanned Surface Vehicle (USV) to accurately follow predefined paths, and thus, an efficient and robust path following control algorithm is essential for many applications. The Vector Field Method (VF) has been widely employed in the Unmanned Aerial Vehicle (UAV) community, and evaluating this well-accepted method for USVs will be of great interest for USV practitioners...
In this paper, we advocate the notion of "BIG" cache as an innovative abstraction for effectively utilizing the distributed storage and processing capacities of all servers in a cache network. The "BIG" cache abstraction is proposed to partly address the problem of (cascade) thrashing in a hierarchical network of cache servers, where it has been known that cache resources at intermediate...
Because of the powerful mobile technology, many crowdsourcing applications emerge to implement location-dependent tasks. One common powerful function of crowdsourcing is to decompose huge or complex tasks into small sub-ones, which require users with different skills to implement. These tasks are composite and implemented completely only after all of their sub-tasks are finished. Meanwhile, users...
Solid state transformer (SST) has recently attracted much attention due to its great potential of being applied in the future smart grid. Modular structure is commonly employed in SST, which makes it possible to enhance the reliability of the system by introducing redundancy fault-tolerant control (RFC). This paper presents a general design of 10kV/1MW SST with 800V DC bus, and the various RFC strategies...
With the widespread use of solar energy, the grid-connected photovoltaic (PV) systems based on solid state transformer (SST) have considerable prospect. This paper presents the design and demonstration of a three-phase 800-V/10-kV 1-MW SST for grid-connected PV system. The topology of the 10-kV/1-MW SST is designed as a modular structure containing the dual active bridge (DAB) converter and full bridge...
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