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Scientific visualization is a multidisciplinary technology, which integrates computer graphics, data mining, human-machine interface theory, and combines with the applied sciences, and provides an intuitive way to show valuable data in engineering area, and provides means to operator for exploring and studying physical phenomena. In recent year visualization techniques are used more widely in power...
In order to assess and improve the reliability of wind turbine generators (WTG), and to optimize the maintenance strategy, it is necessary to use online monitoring data acquired from supervisory control and data acquisition (SCADA) system to assess the real-time operational conditions of WTG. Because the determination of fuzzy membership function is subjective and fails to take randomness into account...
According to the need of distributed intelligent video surveillance in intelligent transportation system (ITS), a design based on S5PV210 microprocessor and embedded Linux operating system is proposed for real-time dynamic video target tracking and display. The scheme of the whole system design and the technical solutions of software and hardware are given. The system makes full use of the efficient...
We demonstrate a microfiber FP sensor that is manufactured directly in the micro-size fiber by the use of a 193nm-excimer-laser exposure. The spectral characteristics and the wavelength dependency on the external strain, temperature, and refractive index are investigated. The research results are useful for future applications of the devices.
We demonstrate a method for obtainment of high refractive index sensitivity by inserting a highly-birefringent bow-tie fiber into a rectangular-microfiber Sagnac loop. The sensitivity is enhanced significantly when a certain condition is satisfied. The maximum absolute sensitivity reaches 34772 nm/refractive-index unit (RI-unit), which is around five times of the value, i.e. 7069nm/RI-unit, without...
A novel high area-efficient on-chip lag (PI) compensation technique for power converters is proposed in this paper. This technique combined current-mode with voltage-mode capacitor multiplier. The compensation capacitor can be reduced to smaller than 10% of the conventional one. This proposed technique is successfully verified by a boost converter system with current program mode (CPM) control. The...
This paper focuses on two integration algorithms used for pseudo-dynamic test, explicit New mark algorithm and implicit alpha-C algorithm. The comparison study between the test and simulation results shows that: the non-uniform distribution of mass, restoring force characteristics and higher frequency vibration modality are simulated more accurately using the alpha-C algorithm than using explicit...
Civil Experimental System consists of electric-hydraulic servo-controlled machine and the data recorder in which the recorded data are saved. In Electro-hydraulic servo controller, a exterior trigger signal is used to remote control the data recorder working, and the problem of simultaneously data recording is solved by on-line processing of servo testing machine and data recorder, which quicken the...
At the background of the idea “Cooperation of colleges and enterprises, combination of work and study” in higher vocational education, increasing employment rate and enhancing students' professional capacity as well as comprehensive quality are important subjects of higher vocational talents training. The thesis introduces the major of pharmaceutical trading and management in a university in Chongqing...
In order to deal with the rigorous test of electric security under extreme nature disasters, this paper presented the framework of open visualization platform about electric security alarm. We used the novel hierarchical visual technology on the base of the existing electric grid system, and accessed the information from acquisition system. Combined the electric technology of security, stability and...
In these years, electronic toll collection (ETC) system has developed rapidly in China. However, adjacent-lane communication interference has become a serious problem for high vehicle density case. In this paper, the field distribution of the communication zone of ETC system is simulated by hybrid FDTD-PO method. Firstly, the roadside unit (RSU) antenna is simulated by the FDTD method. Secondly, the...
In this paper, an efficient calculation approach on radiation pattern of conformal array antenna is presented by using far-field data of antenna element. To demonstrate the computational accuracy of the proposed method, a 16-element cylindrical array antenna is simulated as an example. And the simulated results are compared with those of HFSS. Then the performance of the virtual phase shifting technology...
A low-noise, low-power CMOS amplifier is developed using the chopper-stabilized technique. A new filter scheme is employed to suppress chopping ripple and spur. It composes of a band-pass amplifier, a novel low-pass-chopper (LPC) and a low-pass class-AB output stage. With the LPC, the amplifier rejects unexpected high frequency signal by about extra −12dB, which shares burden of the band-pass amplifier...
The distribution networks feature diverse range of equipments and wiring, and the modeling and techniques are essential to the construction of distribution automation. The modeling of power system are mature, and the modeling method is very useful for analysis of power grid. Thus, the modeling of power system are used in the transmission network, which is established based on study on the structure...
Increasing wind power generation quantity needs obviously reliable insulation property of power equipment. Since over 70% of the installed turbines utilize wound rotor induction machines (referred to as double-fed induction generators DFIG) , DFIG is deemed to be one of the most critical components of wind power systems and its performance directly influences the stability and reliability of wind...
Flip chip has become the preferred package solution for high performance IC and microprocessor device [1]. In the area of flip chip, advanced Si node is always the mainstream technology. The integration of highly fragile ELK inner layer dielectric (ILD) material plays an important role to reduce the circuit delay time.
This paper propose a two-step prefetching and active-passive prefetching and caching scheme to decrease the network delay in picture sharing system between smart devices. The scheme use the time that network is idle to prefetch data, reduce users' waiting time. It uses two-step prefetching to reduce bandwidth consumption, use active-passive prefetching to improve prefetching accuracy and efficiency...
Novel microcavity plasma jet devices operating at atmospheric gas pressure have been fabricated in a flexible, robust and optically transparent polymer. By a micromolding process, large scale arrays of microcavities, each having a diameter of hundreds of microns and embedded electrodes, have been fabricated with various form factors that can be precisely controlled.
For novel biomedical applications such as unconventional and large area treatment, an array of microplasma jets produced in 200 µm diameter channels has been designed and fabricated in several material platforms, including alumina and polymers. For the experiments reported here, the jet array was fabricated in an Al/Al2O3 structure and driven by a sinusoidal waveform having an RMS voltage of ∼1 kV...
With the development of wireless sensor networks, low-cost and high-reliability industrial wireless sensor networks become feasible. The industrial wireless sensor networks should be designed to resist the failure of some nodes in harsh environments. In order to minimize the installation cost of relay nodes for fault tolerant hierarchical networks planning, we proposed a genetic simulated annealing...
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