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.
There are two main challenges, drift and scale ambiguity, restricting monocular visual odometry from an extensive application on real autonomous navigation. In this paper, an iterative localization framework is presented to globally localize a mobile vehicle equipped with a single camera and a freely available digital map. Inspired by the concept of cloud, a new Gaussian–Gaussian Cloud model is proposed...
Hybrid excited flux-switching machine (HEFS) is a novel brushless synchronous motor. Compared to conventional permanent magnet synchronous machine (PMSM) and permanent magnet flux switching (PMFS) machine, it has additional excitation winding in its stator to modulate the air-gap magnet field. In this paper, the topology and operating principle of HEFS is analyzed. Its dynamic mathematical models...
In order to study the influence on the statistical distribution characteristic of dynamic radar cross section (RCS) from aircraft flight speed, firstly through analyzing aircraft aerodynamic, setting track model, calculating attitude angle and electromagnetic simulation, the three groups of dynamic RCS sequence were obtained under different flight speed. And the fitting curves of dynamic RCS sequence...
Along with the rapid development of wind power generation technology, numerous of wind generators will connect into distribution network. When the wind power is equivalent to a part of the comprehensive load of the distribution network, traditional load model is not appropriate for load characteristics any more. This paper raises a new method about generalized load model, which is to add an induction...
To calculate the static voltage stability critical point, an improved continuation power flow method based on traditional continuation power flow is proposed. Considering the quasi secondary features of PV curves, the proposed algorithm uses the least square method for prediction. Fit a quadratic curve combined with all the power flow solutions known in the calculation process. Through the curve we...
It is presented in this paper that a novel soil drilling sampler which can be used to drill deeply automatically in the planetary soil. There are three transmission routes of motion in the drilling sampler: rotating drive mechanism and feeding drive mechanism are used to generate the rotary and axial movement of the driller respectively while impacting drive mechanism is used to assist drilling the...
An improved network model to adjust weights of BP network based on particle swarm optimization(PSO) was proposed. The fuzzy control was used to assign the different weight to PSO and BP algorithm during different periods. PSO algorithm plays a main role in the previous evolution period, and BP algorithm plays a vital roal in later period. The model can overcome the slow convergence and easily getting...
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.