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.
It is introduced that the present situations and strategy about the maintenance works of USB apparatus on ship in this paper. In order to increase measurement efficiency, a remote back up system is proposed to complete measuring and controlling task successfully. This system is used for monitoring and diagnosing the Shipborne USB based on LXI( LAN extensions for Instrumentation). The signals and measuring...
This paper proposes a algorithm of maximum power point tracking based on fuzzy Neural Networks for photovoltaic generation systems. The system is composed of a boost converter and DC pump motor load. The maximum power point tracking control is based on fuzzy Neural Networks to control a IGBT switch duty ratio of a boost converter. The fuzzy Neural Networks provide attractive features such as fast...
Most universities today have large and complex structure and activities (Multiversity) and, exist in them, huge amount of data resources. But until now, there is no mature method to collect and process these data to meet the need of information system application. Some systems used in separate sectors can not provide effective information for management decision and meet the needs of public inquiries...
The problem of node path attempters which is needed solve the important problem in grid all along. Aim at basic ant colony arithmetic appears halt easiness, through improving basic ant colony arithmetic, bring forward ant colony multilevel path optimize tactic based on information consistence optimize, this tactic use optimize average information element distributed degree, strengthens the whole (the...
This paper presents an intelligent testing system for underwater transducer array by using virtual instrument technology. The testing system is used to test the identities between transducer and transducer of the underwater transducer array. The hardware and software architecture of the testing system are introduced. The system software is developed on the LabVIEW. LabVIEW, a graphical programming...
By studying the design principles of multi-valued logic and characteristics of adiabatic circuits, a novel design scheme of ternary adiabatic counter was proposed in this paper. Guided by switch-signal theory, the scheme derives the switch-level structures of ternary adiabatic T-operation circuit, and using bootstrapped NMOS to realize energy input and recovery, then the ternary adiabatic counter...
At present, using the computer to imitate the complicated circumstance of Urban rail transit, to study the theory and methods of Urban rail transit operation and control, is really an economical, reliable and safe method. Therefore, from the viewpoint of both academic research and realistic application, building and carrying out the test model of ATO (Automatic Train Operation) System is of strong...
Recently, IPTV service has attracted significant attentions to both of the ISPs and normal users,and the quality of experience (QoE) from the users point of view is the most improtant evaluation for IPTV service provider. A reasonable peer selection mechanism of P2P based IPTV service can provide the end-users with a better QoE in a limited network resource environment. Therefore, the cross-layer...
In current version of Trusted Network Connection (TNC) architecture, IF-MAP protocol creates a structured way to support real-time data interchange and dynamic management. However, there is a big challenge that the MAP Server has to process mass metadata published by all kinds of other security components in trusted network. In this paper, we propose a novel design for MAP (Metadata Access Point)...
For the demand of special sensors' full test in industry scene, a small high-speed logger which can be embedded in machines appears.S3C2440A is used as main control chip, μC/OS-II as Embedded Operating System. With high-speed AD convert chip AD7899, it presents the solution to signal disturbance in multi-channel, high-speed signal sampling and storage. Its functions include the collection, the recording...
Aiming at the problem that common sliding mode control method can not satisfy the control need of nonlinear system with disturbances and uncertainties, this paper proposed a modified global fast terminal sliding mode control method with time-delay estimation (TDE), through which, the disturbances and uncertainties were estimated and simulation analysis was carried on the brushless DC motor actuator...
In a traditional data warehouse, the “subject oriented” means that all the elements (data attributes) relating to the same real-world event or object are linked together, the elements are classified and navigated by “subject”. But in scientific data warehouse, elements are “faceted classifications oriented”, users want to classify and navigate the elements by mutable classifications flexibly. It is...
In this paper, a 2nd order tunable RF CMOS LC bandpass filter with the on-chip inductor is presented. Q-enhancement and tuning are also considered. The Q-tuning is implemented through an adjustable negative conductance generator circuit. The simulated results show that the center frequency of the filter using a 0.18µm CMOS process can be operated from 1.90GHz to 2.42GHz frequency band under 3.3V supply...
In this paper, direct power control based on the virtual flux (VF-DPC) of the three-phase voltage-type PWM rectifier is presented and the formation mechanism of the switching table is analyzed. In Matlab / simulink environment the model of the VF-DPC system is established. The simulink results show that the system has good dynamic response and a good way to achieve active power and reactive power...
This paper studies the small mobile scenery generating system used by the farmers in the edge area. The system consists of three major components,. the first part is the wind power system, which consists of wind turbines, non-controlled rectifier, Boost converter etc; The second part is composed of the solar panels power, wind power systems and solar panels composed of complementary power generation...
The complexity and variability of business demands have increased the difficulty of reuse of enterprise application systems, but there are some common demands in the different enterprise applications, such as the requirements for data query and statistics. This paper presents a general-purpose query platform whose goal is to provide a reusable query building infrastructure for different enterprise...
In the field of integrated circuit design, the on-chip communications for parallel computations are increased rapidly. Due to the low efficiency of the traditional bus-based structure of System-on-Chip (SoC), Networks-on-Chip (NoC) is emerging as a predominant substitute for interconnection in SoC. Meanwhile, Orthogonal Frequency Division Multiplexing (OFDM) technique has becoming a popular research...
Static Synchronous Compensator can be taken as a nonlinear system, which exists in the nonlinear problem during its operation, such as chaos. So, these instability phenomena cannot be predicted in system. This research will enhance to analyze some existing phenomena; on the other hand, the new design methods and control strategies may be possible to be developed by these researches to achieve some...
Graphics cluster based parallel rendering has been widely used in computer aided design, scientific visualization, geometry scene rendering, virtual reality and so on. The key to high performance on graphics cluster is rendering task distribution strategy. According to multi-stream based data organization in Direct3D, this paper has presented sort-first multi-steam based rendering task distribution...
In current live Peer-to-Peer (P2P) streaming systems, buffering delay is too large compared with the channel switching delay of traditional TV service provided by cable companies. In this paper, network coding is applied to a live P2P streaming system to minimize the buffering delay that users experience. A new scheduling algorithm is designed, with server-push mechanism and intelligent method for...
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.