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In view of how to relief driving fatigue to the drivers effectively, designing a intelligent clutch control system which has simple and novel structure. The system includes four parts, which are clutch mechanical assembly, manual controlled clutch equipment; intelligent clutch controlled equipment and controlled system. According to the loading test in car, The test results show that the intelligent...
The shock absorber Electro-hydraulic Servo-testing system conformed to national standard QC/T 545–1999 is designed, error compensating PID regulation method which is appropriate for signal condition was applied. According to use the MTS407 controller and LabVIEW virtual instrument software, implement dynamometer diagram testing, speed diagram testing, friction diagram testing, temperature wearing...
A multiobjective, reliability-based design optimization (RBDO) is performed considering manufacturing uncertainties in order to facilitate the performance and reliability of a centrifugal compressor. During the RBDO procedure, Monte Carlo Simulation (MCS) is utilized to calculate failure probability. Latin hypercube design (LHD) is adopted to sample and form simulation experiment scheme. Besides,...
We demonstrate the generation of electron currents with remotely launched surface plasmon polaritons in Au nanojunctions under ambient conditions. Electron currents across gaps ranging from 4–12 nm are investigated and described by a modified Wentzel-Kramers-Brillouin (WKB) model.
In order to improve the remove-restore theory, a novel algorithm based on wavelet analysis has been proposed in this paper. Through the similarity comparison between earth gravity field model and terrain correction, it is found that the model gravity anomalies contain some of high-frequency signals caused by terrain. Given this, the wavelet analysis theory has been introduced here to extract high-frequency...
The integration of GIS and video surveillance systems is very useful for security and city management, which can provide real-time spatial-temporal information and display them on electric map. The key technology mainly includes the mapping between videos and map, the tracking for dynamic objects. Firstly, we propose an integrated framework of GIS and video surveillance system. Secondly, we present...
There are two method frequently used for parallelization: data parallel and task parallel. According to the characteristics of analysis of digital terrain, data parallel is more applied, so Petri nets is introduced in this paper to describe the parallel relationships within data patitions based on granularity model. As for different storage environment, corresponding scheduling algorithms are proposed...
In public venues, crowd size is a key indicator of crowd safety and stability. Monitor the people number and crowd density levels are important scientific research topics. In this paper, we present a framework that will enable real-time crowd counting and spatial-temporal analysis for the crowd of the monitoring region. Firstly, we obtain crowd counting models for each camera by statistics regression...
This paper proposes a new video file, which can integrate video information, audio information, as well as the spatial positioning information into a whole file. Given that the video frames have their corresponding spatial positioning information, we propose a set of methods to organize and manage locatable videos based on GIS technique, including splitting locatable video into geographic semantic...
This experiment mainly the degree of hydrolysis as an index, considering the amount of enzyme, substrate concentration, temperature and PH value on the influencing factors, through the response surface method for screening protein, alkaline protease hydrolysis crucian carp optimum conditions. Experimental results show that the amount of enzyme (E / S) 1.5%, the substrate concentration of 1%, temperature...
This paper proposes a new video file, which can integrate video information, audio information, as well as the spatial positioning information into a whole file. Given that the video frames have their corresponding spatial positioning information, we propose a set of methods to organize and manage locatable videos based on GIS technique, including splitting locatable video into geographic semantic...
Based on the hydrogeological conditions in the northern foot of Tianshan Mountain, the hydrogeological conception model is generalized, and then 3-D unsteady numerical model of groundwater is established. When the current hydraulic projects are kept unchanged, the model predicts water-level fluctuations from 30 September 2004 to 30 December under the condition of current exploitable methods of water...
Midlink optical phase conjugation (OPC) based on four wave mixing (FWM) in semiconductor optical amplifier (SOA) can be used to compensate for Gordon-Mollenauer phase noise in CO-OFDM long-haul systems. Simulation of 40Gb/s CO-OFDM systems without optical dispersion compensation is presented and Q factor can be increased by >;6dB.
We present the pilot-aided phase compensator (PC) at receiver to compensate phase drift due to laser linewidth for 100 Gb/s polarization division multiplexing coherent optical OFDM (PDM-CO-OFDM) system. Simulating results are shown that PC is very effective and the improvement of Q is >;5 dB for 800 km link with 100 kHz-linewidth.
The fiber nonlinearity impairments in 40Gb/s CO-OFDM are post-compensated by fiber nonlinearity post-compensation (FNPC) located before the receiver, which includes spectrum inversion (SI) and a subsequent 80km compensation high nonlinear fiber (HNLF). Simulating show that the performance can be significantly improved for single-channel and WDM systems.
In Orthogonal Frequency Division Multiplexing (OFDM), Fourier Transform (FT) is used as a modulation technique. To avoid Inter-symbol Interference (ISI) in OFDM by a time dispersive channel, a Cycle Prefix (CP) is used which also reduces its spectral efficiency. Discrete Wavelet Packet Transform (DWPT) as a modulation scheme has been proposed for wireless communication. In this paper, DWPT based OFDM...
A new ontology-based image retrieval framework which brings in SIFT features is presented in this paper. Firstly, it brings SIFT features into the image ontology to build an ontology library which describes the image element together with shape, color, texture and other low-level features. And then, calculate the similarity of SIFT features, low-level features, concept of ontology and semantic features...
In this paper influence of inline dispersion compensation in 100Gb/s polarization division multiplexing coherent optical OFDM (PDM-CO-OFDM) system is studied by numerical simulation. The results show that amplified spontaneous emission noise (ASE) in additional Erbium-doped fiber amplifier (EDFA) and dispersion compensation fiber (DCF) nonlinearity has great impacts on the performance of inline dispersion...
An effective approach to extracting geometric information of scenes from a single uncalibrated image is presented in this paper. Without any prior knowledge of the camera, we describe how to employ cross ratio to compute the length of a line segment on plane surface, while only the length(s) of the certain segment(s) is/are known. Real images of indoor and outdoor scene tests validate our approach.
In this paper, we suppose a new system called MIMO-OCWDM system which combines MIMO with orthogonal complex wavelet division multiplexing (OCWDM). The results are simulated using V-BLAST architecture with different transmit and receive antennas; their performance are analyzed in terms of bit error rate (BER). We evaluate that the performance of MIMO-OCWDM system is much better than that of MIMO-OFDM...
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