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.
Dynamic variable coupling analysis is an important method to properly design a control structure for complex multivariable and multi-physical dynamic systems, such as fuel cells. The fuel cell is an electrochemical energy conversion device which includes different inter-coupled dynamic phenomena in electrical, fluidic, and thermal domains. In order to achieve optimized fuel cell performance, different...
Due to the ever-increasing use of electric vehicles (EVs) and renewable energy sources, the charging station with renewable energy supply is made as one promising energy solution. Moreover, grouping vehicles into platoons could greatly improve road capacity and reduce energy consumption. These tendencies urgently demand a theoretical performance analysis framework of the EV platoons charging at renewable...
A multivariate discrete grey forecasting model is proposed to solve the problem that the qualitative relative factors can't be employed in traditional models. Firstly, a new model is constructed though introducing dummy drivers. Then, the parameters estimation method and recursive function of the model are discussed. Furthermore, dummy driver setting, pre and posttest methods of dummy drivers are...
Atmospheric turbulence is one of important factors to affect UAV flight smoothly. To reduce the influence of atmospheric turbulence, active disturbance rejection controller is designed in this paper. Firstly, mathematical models are built for UAV movements and atmospheric turbulence. Secondly, the altitude controller and the lateral deviation controller with linear state equations are designed. Finally,...
As an important part of supply chain costs, transaction cost has not been considered much in traditional cost accounting. In the past, transaction cost of purchasing was contained in material or fixed asset cost at recognition and initial measurement. Then, it was gradually apportioned to income statement. However, transaction cost of sales was directly charged as expense of this period. With huge...
Risk analysis of reservoir generation dispatching plays an important role in seeking the best scheduling scheme that gives consideration to both risk and benefit. Traditional risk calculating method can't meet the needs of medium and longterm electricity generation dispatching very well, so this paper proposed probability optimization method of risk analysis, and constructed a risk evaluation index...
The physics of failure (PoF) methodology is a primary approach for prognostics, especially for those of electronic products and assemblies. This paper summarizes the requirements for developing a generic field deployable prognostic software system using the model-based approach. It then proposes an implementation solution to design such a system while meeting those requirements. It in the end shows...
In this paper, a new approach of business process modeling-hierarchical modeling, is put forward. The core idea of this approach is the standardization of model symbols and the process of modeling. The business process model which is built by this approach is fit for the optimization for the purpose of BPR.
Purpose: to study the performance of DTC system (direct torque control) within the Motorized Spindle full-speed range, and to improve the observation precision of Motorized Spindle stator flux by adopting the Full-order stator flux observer. Method: construct a Motorized Spindle DTC system based on the mathematical model of Motorized Spindle under a static stator reference frame; revise the deviation...
This paper proposes a new mathematical QoS model called LRD_Q_Model for long range dependence (LRD) multimedia flows on the basis of network calculus theory. In LRD_Q_Model, the packets of a LRD flow are regulated by the Fractal Leak Bucket model at the edge nodes of networks and scheduled by the weighted fairness queuing (WFQ) model at each router of the transmission path. We give the service curve...
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.