The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In practice, the lift that a propeller produces is composed of theoretical value and fluctuation, which results in vibration in aircraft. This paper will analyze the effect of the fluctuation on the quadcopter. In order to reduce the vibration caused by the fluctuation, an improved Additive-State-Decomposition-Based (ASDB) dynamic inversion stabilized controller is proposed. To show its effectiveness,...
Influence diagram is an effective mathematical representation of decision situations, in the traditional influence diagrams, the dependencies between nodes of uncertainty and the value table of value nodes are constructed through probability models, they get widely applied in intelligent decision analysis. But information system (IS) in our lives are very complicated, such as grey information data,...
Aiming at the problem that traditional Meanshift tracking algorithm cannot track target accurately. When target is occluded or background interferences appear, a new tracking algorithm based on features matching and motion detection predicting is proposed. The new algorithm extracts features of target by the SIFT algorithm to realize the location. The original iteration position is estimated by the...
This paper makes full use of the invariance of the sliding mode control and the real-time and adaptive characteristics of fuzzy CMAC. FCSMC (Fuzzy CMAC sliding mode controller) is proposed. The control target is to achieve reaching condition of sliding mode control becoming zero by the adjustment scheme of the fuzzy CMAC network parameters such as weight, center values. Coupled tank liquid control...
A control strategy of three-level multi-functional grid-connected inverter for distributed grid is proposed. According to different conditions of distributed generation, the multi-functional inverter can realize the function of injecting power from the distributed generation and suppling power into the grid simultaneously or separately, and the function of shunt active power filters such as the harmonic...
In recent years, with the development of next-generation sequencing technology, large amounts of omics data have been generated, making it possible to explore the molecular mechanisms of Huntington's disease by computational methods at a genome-wide scale. Since the pathology mechanisms of the neurodegenerative diseases are complicated, the traditional computational methods cannot effectively identify...
Spot network, as a special low voltage secondary network, has very high supply reliability and it is beneficial for integrating Distributed Energy Resources (DERs). In the conventional spot network, all the feeders are the sole power source and provide unidirectional power to the secondary network. The equipped network protector prevents the power flow from the network to the feeder, in order to protect...
The problem of fault detection for a class of continuous-time nonlinear networked control systems subject to delays induced by the networks from the sensor to controller and from controller to actuator is concerned in this paper. An observer-based fault detection filter is designed. A sufficient condition is also derived which makes the closed-loop system asymptotically stable in terms of linear matrix...
This paper introduces a fitness data management system based on the Android platform for the strength fitness equipment, which can display, storage and mange fitness data. The server for this system is Tomcat and the mobile terminal's operating system is Android. App installed on the terminal interact with the database through HTTP transport protocol, which enable the visual management for fitness...
For the problem of hefty workload and bring impurity in the process of artificial transformer internal fault detection, a WiFi control based robot is designed to detect the internal fault of the oil-immersed power transformer. The outline structure of the fault detection robot for transformer is illustrated, and WiFi communication module is used to build the control system of the robot. Electromagnetic...
The transmission line grounding device is an important electrical equipment to avoid accidents of lightning. A new type intelligent detection system of transmission line grounding device is designed for the transmission line and tower of multi-lead line grounding, the detection method of transmission line integrated grounding devices and the fault identification method are proposed, and the practical...
The present status of heart sound recognition is introduced in the paper. In order to improve the performance of heart sound recognition, a new model based on SVM is proposed. Firstly, the wavelet transform is used to reduce the noise of the heart sound, and then MFCC feature is extracted from heart sound. On this basis, the Support Vector Machine is used to build the classification model. In the...
The risk assessment is an important task in operational management. Since secondary system of substation(SSOS) is an important part to ensure the safe operation of the substation, close attention is needed to its operation risk causing power loss. According to past research, the difficulties of its risk assessment include complex relationship of secondary devices, and risk analysis of its impact on...
This paper proposes a demand-side pricing strategy to purchase regulation service. The demand-side regulation service has the advantage of lower cost and faster response to reduce the utility company's cost comparing with the traditional automatic generation control (AGC). Thus, it is necessary for the utility company to make a tradeoff between the demand-side regulation and the AGC to minimize the...
A hybrid Petri nets model for the optimal control of mine drainage systems is presented. This model uses continuous Petri nets to describe and analyze continuous variables of mine drainage systems, and uses controlled Petri nets to allow feedback control and time delay Petri nets to assess the performance of mine drainage systems. This model redefines the fire velocities and the fire rules of the...
Order acceptance and scheduling problem has attracted much attention and been investigated in some shop environments including flow shop in the past two decades; however, OAS is seldom considered in job shop. In this study order acceptance and job shop scheduling problem (OAJSP) is studied and then a novel neighborhood search with memory and global exchange (NSMG) is applied to maximize total net...
Image-guided navigation is an important component of the orthognathic assisted robot, and it allows the robots to operate in precise accordance with a preoperative virtual plan. However, the present commercially available image-guided navigation systems, which use infrared-based tracking, cant guide the relocation of the bone in the orthognathic operation, that means they are not suitable for orthognathic...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.