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 view of the current brushless DC motor the electromagnetic torque ripple and the detection method, control algorithm complex, high cost of defects, this paper puts forward a new brushless DC motor torque ripple suppression method, by means of the method of controlling brushless DC motor conduction phase current track the given current to inhibit motor torque ripple, this paper discusses in detail...
It analyzes the non-linear term structure of interest rates of Treasury in Shanghai Stock Exchange, using two-factor Vasicek model and Kalman filter in the state-space framework. The observation errors of one-year and 20-year interest rates are extracted and estimated applying the Archimedean copulas and mixture copula by maximum likelihood estimation. It has shown that the Gumbel copula and mixture...
The chondroitin sulfate was isolated from tilapia byproduct by a method of dilute alkali hydrolysis with the assistance of microwave. Optimization using response surface methodology (RSM) was performed and 3D response surfaces were plotted from the mathematical model. The results indicated that the optimal extraction conditions were as follows: microwave power was 252W, microwave time was 5.64min,...
Modeling of variation propagation in multistation machining process is one of the most important research fields. In this paper, a mathematic model to depict the part dimensional variation of the complex multistation manufacturing process is formulated. A linear state space dimensional propagation equation is established through kinematics analysis of the relationships among of locating parameter...
The model of vehicle routing problem with backhauls is built based on natural description, then an improved immune algorithm for the problem is applied in which a new coding method, the adaptive mechanism of the information entropy of antibody, and evaluate function are introduced. The computational result demonstrates that the high quality solutions to the vehicle routing problem with backhauls can...
Knowledge exchange research of supply chain enterprise has been playing an important role in the knowledge management of supply chain. Knowledge exchange of supply chain concerns the core capacity of the whole supply chain. This paper discusses the supply chain competition in cooperative and non-cooperative conditions under different models. Last but not least, this paper extends the model and makes...
A novel control scheme for the active suspension in a 4-DOFs pantograph is presented here. The concepts of force cancellation, Skyhook damper and track-following spring are jointly applied to establish an active vibration control system. A force cancellation control scheme is used to isolate the sprung masses. Skyhook damper is employed to form the sprung mass. Track-following springs are applied...
The fleet assignment is a key factor affecting the operating costs of an airline. In this paper, we address the fleet assignment problem (FAP) in which the flight route is taken into account. On the basis of the analysis of the airlinepsilas cost structure and the space and time method, a more comprehensive mathematical model with regard to the hub-and-spoke network is provided. In the model, not...
The fleet assignment is an important factor affecting the airline's operation costs. Given a flight schedule, which consisted of a set of flights with specified departure and arrival time, a set of aircraft types and a set of restrictions, the airline fleet assignment problem (FAP) is to determined which aircraft type should fly each flight leg. Based on the analysis of the real operation circumstance...
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.