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To maximize the efficiency of wave attenuation of anti-wave forest with low cost, a multi-objective optimal layout selection model using improved fuzzy entropy was proposed. A new entropy weight calculation formula was introduced in the fuzzy entropy to improve the reliability of entropy weight. The effect of each vegetation factor was quantified and analyzed. The law of wave attenuation was revealed...
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...
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...
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...
This paper presents an intelligent selection method for industrial transmission sphere of interferometer. A typical application of interferometer is to inspect a spherical surface. The surface shapes and irregularities of samples can be measured with the coincidence between the center of concave or convex surface and the cat's eye of transmission sphere (TS). However, due to the type, size and radius...
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,...
Water supply system has characteristics of non-linear, time-varying parameter, large time delay, so its mathematical model changes time by time. Water supply system widely use PID controller to keep constant pressure and PID controller need accurate mathematical model. The system that use PID controller is along with large overshoot, more adjusting time. Fuzzy controller don't need the accurate mathematical...
State estimation is the foundation of energy management system. The innovation graph state estimation has an advantage over traditional state estimation in identifying bad data. We infer the distribution function of innovation difference and set the threshold in certain false drop rate, which provides the theoretical basis for identifying bad data in mathematics. The range of acceptable measuring...
Contrast of image plays an important role in image perception quality and is also susceptive to various factors during image acquisition process. However, only a few image quality evaluation algorithms have been focused on the contrast-changed image quality assessment (IQA), and none of these methods belongs to blind IQA algorithms. Therefore, they cannot be applied to the case when the reference...
With the development of electric locomotives in the direction of high speed and heavy load, the problems of negative sequence current and excessive neutral section in traction network have become more serious than before. Thus, a hybrid railway power conditioner (H-RPC) is proposed for co-phase power supply system to solve these problems. In this paper, the topology and compensation principle of the...
In order to coordinate the damping performance and energy regenerative performance of energy regenerative suspension, this paper proposes a structure of vehicle semi-active energy regenerative suspension with electro-hydraulic actuator (EHA). On the basis of system principle, the nonlinear model of the semi-active energy regenerative suspension with EHA is established. Meanwhile, LQG control strategy...
With the fast development of cloud computing and online business of Internet, the importance of data center is gradually increasing. Conventional Ethernet protocols can hardly meet the scalability and performance requirements of data centers (DCs). The traditional method solves the congestion problem by reducing the network throughput. In this paper, based on software-defined networks (SDNs) technology,...
This paper presents the biological control for a radially free distributed hexapod robot. The CPG(central pattern generators) network consists of six CPG units based on Hopf neural oscillator that used to generate rhythmic oscillatory signals for the end trajectories of legs. The ring-type network topology of CPG network that consists of six CPG units is established. By computing the inverse kinematics,...
The intelligent control technology of agricultural machinery based on satellite navigation system is an important part of modern agriculture fine production. This paper through the technical theory analysis, system hardware and software design, control terminal research and development, the actual application of the overall research, the use of embedded system hardware and software collaborative optimization...
From investigating graphical passwords (NGPs), we define set-labellings and set-colorings (set-labelling/colorings) of networks/graphs, and define the new edge-colorings called adjacent 1-common edge-coloring and vertex 1-common edge-coloring. Some connections between traditional graph colorings and our set-labelling/colorings are found. Conversely, our results can be used to design more complicated...
Community detection in complex networks is very important for decision-making in the real world. Swarm intelligence optimization is an effective method for community detection. However, such algorithms are easy to fall into local optima and tend to ignore smaller communities. This paper proposed a community detection algorithm with locally social spider optimized (LSSO/CD). The network nodes and their...
The most commonly used algorithm in the sound source localization algorithm based on time delay estimation (TDE) is generalized cross correlation, but the algorithm is more sensitive to noise and reverberation. Aiming at this problem, this paper proposes a time delay estimation algorithm based on quadratic correlation. The correlation peak precision algorithm is used to improve the resolution near...
The most critical technique in the train number detection process is the extraction and division of vehicle image. This paper introduces an intelligent detection system based on two cameras. First of all, on the basis of kalman prediction tracking algorithm, this paper puts forward a kind of collaborative tracking discriminant train number system, and determining the best Angle of the camera. To correct...
Stepping motion is the movement of output execution with fixed period of motion, and the cam type manipulator has the characteristics of steady movement, accurate transmission, controllable working speed and low cost. According to the output step action design 6 different types of cam mechanism(plane groove cam, cylindrical cam, globoidal cam mechanism with cylinder cam mechanism, plane groove cam-cylindrical...
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