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.
Due to it is difficult to predict the diffusion of city haze, based on the Gaussian plume dispersion model, at first, the paper researches the applicable conditions, and then proposed several methods to amend the model, such as surface roughness, atmospheric stability, secondary pollution and condition of breeze. On this basis, we established the Multi-source haze diffusion model, which is constituted...
3D path planning of unmanned aerial vehicle (UAV) targets at finding an optimal and collision free path in a 3D cluttered environment while taking into account the geometric, physical and temporal constraints. Although a lot of works have been done to solve UAV 3D path planning problem, there lacks a comprehensive survey on this topic, let alone the recently published works that focus on this field...
This paper proposes a new method of the maximum power point tracking(MPPT) based on the model of photovoltaic array. We can get the maximum power point voltage through the model. Then established a MPPT simulation model in Matlab/Simulink and proved the new method correctly and reliability.
This paper analyzed several common methods of calculating the battery's State of Charge(SOC), such as the Open-circuit voltage method, Ampere time method, Neural network method. And this paper puts emphasis on the improving Kalman filter. Then a controlling strategy of batteries imbalance that based on the battery's SOC and voltage is explored. The controlling strategy is effective and feasible through...
This paper presents a comprehensive study on the effects of the caudal fin shape on the biomimetic propulsion performance of a harmonically heaving and pitching caudal fin. A propulsion system was designed and a series of hydrodynamic experiments for three caudal fin shapes (the whale caudal fin, the dolphin caudal fin, and the tuna caudal fin) were performed. Then numerical simulations based on RANS...
The DFT-based beamforming weight-vector codebook is considered as an effective design for spatially correlated channels. In this paper, we demonstrate that when the antenna elements are uniformly spaced as well as linearly arranged, and the channels are spatially correlated, the codewords in a DFT-based beaforming weight-vector codebook approximately match the distribution of the optimal beamforming...
This paper proposes a new method of designing a nine-point controller using FPGA technology. The key of this control strategy is to perform a logical relationship between the error, the error rate and the working states of the nine-point controller. Four assistant variables, which will reduce the logic units and the complexity, were introduced to the algorithm in order to optimize the design on FPGA...
In the design and construction of the photovoltaic system, a method is necessary which can concisely, quickly, accurately calculate the I-V curve of the whole photovoltaic array. This article propose a method that based on basic technology parameters provided by supplier, considering solar array element number, the total number of series and parallel branch and according to real-time light intensity...
Infrared images are widely used for many purposes. A recognition system of IR targets is essential for equipments that have to work in dark. In this paper, we proposed an IR image weak target recognition algorithm by discrete-time cellular neural network (DTCNN). We constituted an IR image weak target recognition system with DTCNN. The proposed method only requires a 3×3 neighborhood. We used a variable...
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.