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.
Film-type pressure self-adaptive water-tight junction box (FPSWJB) is a combination of the film-type compensator and water-tight junction box. Taking the advantage of responding rapidly and occupying little volume, the FPSWJB can both separate the sea water from the inside electronic components and keep the inside pressure balanced to the ambient pressure. In this paper, the model of hydraulic oil...
This paper proposes a motion trajectory control method of underground intelligent scraper based on particle swarm optimization. The simulation model of whole system was established in simulink according to autonomous navigation bivariate PID control algorithm and scraper motion control model. The process of particle swarm optimization was designed based on MATLAB platform. The parameter optimization...
Recently, short message service (SMS) has become one of the most popular applications for mobile users. However, it provides convenience for worms to spread in mobile networks. Due to the differences between computers and smartphones, the current propagation models of computer worms cannot be employed in the mobile network directly, especially in the SMS scenario. In this paper, we propose a worm...
Software-Defined Networking (SDN) allows flexible and efficient management of networks. However, the limited capacity of flow tables in SDN switches hinders the deployment of SDN. In this paper, we propose a novel routing scheme to improve the efficiency of flow tables in SDNs. To efficiently use the routing scheme, we formulate an optimization problem with the objective to maximize the number of...
Software-Defined Networking (SDN) brings great opportunities to improve network performance. However, due to budget constraints and technique limitations, Internet Service Providers (ISPs) can upgrade only a limited number of conventional switches to SDN switches in real backbone networks at one time. In this paper, we propose one heuristic scheme for deploying SDN switches in hybrid SDNs. Our scheme...
Different methods have been analyzed. The Trapezoidal recursive convolution(TRC) method has been introduced to analyze the arbitrary loads of Multi-conductor transmission lines (MTLs). For a complex loads, the voltage and current relation of admittance parameters are deduced. Combining the formula with MTLs FDTD equations, the general FDTD formula of MTLs dealing with arbitrary loads can be obtained...
The Twin Fibonacci sequences are first defined and their linear expressions are given in this paper.The sequence{Un} which is constituted by the matrix eigenvalues is defined and a discussion is given to its properties,including some exact division properties of the sequence{Un} taken modulo m,and the theorem on the least period for module sequence{un(pr)} is shown. Moreover,the relationship theorem...
The article take the computer as the auxiliary means, the use linear plan theory to the large-scale petroleum chemical industry combination unit system establishment mathematical simulation model, simulates the entire wrap petroleum chemical industry installment the investment, delivers, describes between each response mathematical logic relations and the inner link, and causes the model reflection...
According to the magnetic suspension character of the rotor in the new type of gyro, the control mathematic model for the gyro's rotor magnetic suspension system is founded. The system is characterized by its instability ' nonlinearity. In this paper, a variable structure controller is designed. Based on the general variable structure controller theory, the design of switch function using the method...
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.