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 DVE systems, maintaining the consistency of event execution time is the core element to provide a unified view for all nodes in the system. However, owing to the fluctuation of message transmission delay within the network, some events cannot be executed at the expected time set by the sending node., It will seriously impact the interactive experience of the user in the virtual environment, especially...
Conference proceedings front matter may contain various advertisements, welcome messages, committee or program information, and other miscellaneous conference information. This may in some cases also include the cover art, table of contents, copyright statements, title-page or half title-pages, blank pages, venue maps or other general information relating to the conference that was part of the original...
This paper focuses on solving the ship course tracking problem by using Zhang dynamics (ZD) method and a new Zhang finite difference (ZFD) formula. Via ZD method, which is a powerful class of dynamics to solve online time-varying problems, the so called ZD controller of ship course tracking is designed. Then, a 1-node-ahead differentiation formula within ZFD framework termed as 4-node g-square finite...
The vehicular inverted pendulum (VIP) system is one of the most important issues in dynamics and control theory, and has been widely used as a benchmark for testing control algorithms. However, the tracking control and swing-up control of the VIP system have often been investigated separately. In this paper, by combining the Zhang dynamics (ZD) method and the traditional gradient dynamics (GD) method,...
Conventional radar generally uses fixed transmit waveform, which is difficult to obtain optimal target detection performance in the presence of interference. To solve this problem, a joint optimization algorithm of waveform and receiving filter for MIMO radar is proposed. Firstly, the maximization of output signal to interference plus noise ratio is used as objective function. The joint optimization...
This paper analyzes the transmission efficiency of two kinds of communication technologies: summation frame and individual frame. The abstract models for these two communication technologies using linear topology, which is the most popular topology in industrial control field, are proposed in this paper. The simulation results based on the models show that summation frame has a significant performance...
Structural health monitoring plays an important role in protecting civil infrastructures. Smart film bionic monitoring method and video image monitoring method have advantages of high speed and perceptual intuition, so they have been well applied in structural health monitoring. However, the two methods are difficult in detecting structural stress condition and limited in some monitoring aspects....
In order to deal with the problem that the detection performance of sensor networks is easily subject to environmental influence, here proposed is a cooperative target detection algorithm of multi-sensor nodes based on adaptive iterative threshold which lies on Neyman-Pearson (N-P) Criterion: Each sensor node makes a preliminary decision, and processes an adaptive iterative threshold according to...
Accurate and real-time water quality assessment is an important way to ensure healthy aquaculture and protect the water environment. Due to the diversity, nonlinear and uneven distribution of aquaculture water quality parameters, it's very difficulty to assess the water quality. In this paper, the accurate water quality parameters are obtained by an adaptive weighted fusion method, then the water...
This letter presents one absorptive bandstop waveguide filter utilizing two couplers. The proposed absorptive bandstop filer (ABSF) with four ports is achieved by combing two quadrature couplers with two conventional waveguide bandstop filters, unwanted energy within the stopband will be absorbed by absorptive port instead of reflecting to incident port. The theory is analyzed and a waveguide bandstop...
The difïerence of Inertia navigation device distribution between traditional space TT&C ship and new space TT&C ship is discussed. Since the design for Inertia navigation device distribution can affect observation mode and ship posture data usage, ship posture alternative problem is raised base on the analysis of space TT&C ship's design. The problem is conversed to a universal 2 point...
Establishing a good model during the analysis and design phase in the process of software development, is the key for the correct implementation of system. UML (Unified Modeling Language, Unified Modeling Language) is the standard modeling language, graphically on the system analysis and design, Suitable for all stages of software life cycle. Combining vehicle administrative management system, flowing...
New ADCP(Acoustic Doppler current profiler) can estimate surface wave based on current measurement. Now existing background correction algorithm only considers current amplitude, TRDI ADCP commercial software WAVESMON suggest if current amplitude is greater than 0.75m/s, wave estimation should be corrected for background current. The research shows that when background exists, background current amplitude,...
Aiming at the problem of the lack of a type of ordnance equipment unit fault location method, based on UC/GUI embedded graphic user interface, designs a new detection and diagnosis system. the system function includes the self-inspection, Spare parts testing, the actual equipment testing and theory teaching. The system adopts C8051F020 MCU and S3C2440 ARM9 microprocessor, integrated application data...
HaW Mechanical & Electrical (HM&E) System provide services to the ships which are vital to completing its mission, such as water, electric power, oil and mobility. Because mostly system based on "man in loop" traditional mode to control, it need more personnel requirement and run cost. Therefore, combined with the feature of surface warship HM&E system physical model, a layered...
Berthing support system is widely used in ship berthing to ensure the safety. In this paper, we focus on ship berthing support using laser sensor for distance measurement and marine hydro meteorological sensors for wind, wave and current measurement. A laser berthing model is proposed. Leveraging on the model, stern and bow distance, speed, stern and bow direction and ship steering angle can be calculated...
In recent years, the wireless body area network (WBAN) has become a heated topic in research, but its quality of service (QoS) has not received enough attention. The two operation modes of IEEE802.15.4 are analyzed, and the slotted CSMA/CA mechanism is found more suitable for the WBAN. With the simulation tool OPNET the network delays are proved to change in accordance with the parameter values of...
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.