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Imaging period is an important consideration to geostationary interferometric microwave sounder (GIMS) when mapping fast changing target such as typhoon. GIMS simulation system with near real case observation target can evaluate system performance in different system configurations and thus help determine the optimal imaging period. In this paper, GIMS simulation system using MATLAB and near real...
Microwave interferometric radiometer (MIR) is a passive sensor using synthetic aperture technique for microwave remote sensing. Antenna array configuration is the first concern for the MIR application. Various array configurations have been proposed. This paper presents the analysis of the circular array performance and compares it with the Y-shaped array and hexagonal array. Based on the early developed...
Battery charging strategy is a key issue in battery management system to ensure good battery performance and safe operation during the charging process. In this paper, a novel battery optimal charging strategy is proposed by applying the TLBO algorithm to a LiFeP04 battery for an optimal charging based on a coupled thermoelectric model. A specific dual-objective function including battery charging...
Water Cycle Observation Mission (WCOM) is an earth science mission proposed and focused on the research of water cycle under global change. With its three dedicated designed main payloads, WCOM can achieve synchronized observation on a group of global water cycle key parameters, including soil moisture, ocean salinity, snow water equivalent, soil freeze-thaw, atmospheric water vapor, precipitation...
The inter-element phase calibration plays an important role in the overall calibration scheme for synthetic aperture radiometer. The traditional relative phase calibration approach is to use correlated noise injection network, which will be difficult to be implemented in millimeter wave band due to the complexity of the waveguide divider network. A novel self-calibration method for interferometric...
Characteristics of plasma synthetic jet (PSJ) actuators driven by repetitive pulsed discharge have drawn much attention. In this paper, the PSJ actuator is composed of a pair of tungsten electrodes and a boron nitride cavity without a cap. The cavity has a diameter of 8 mm and volume of 400 mm'. The distance between two electrodes ranges from 1 mm to 4 mm. The PSJ actuator is excited by a homemade...
Diffuse discharge sustained by microsecond pulses can generate volume discharge at atmospheric pressure, which has been widely studied since 2010s. Although the fast rising time limits the formation of spark stream under certain condition in microsecond-pulse discharges, the pulse repetition rate and gap spacing may also affect the discharge mode. In this paper, the optical emission spectra and discharge...
In an inhomogeneous electric field, there are several kinds of discharge modes existing in microsecond-pulse gliding discharges. In this paper, we investigate mode transition among different discharge modes and the effects of pulse repetition frequency (PRF) and gap distance on microsecond-pulse gliding discharge by measuring the voltage-current waveforms and discharge images. Experimental results...
In this paper, a curl antenna with a main curl and a parasitic curl is proposed. The advantage of low profile can be achieved due to the coupling between these two curls. A lumped capacitor is utilized to help the impedance matching. One prototype is designed at the center frequency of 1.575 GHz with the thickness of 10 mm or 0.0525λ1.575, which is only 34% of that to the traditional curl antenna...
Clustering algorithms are often adopted in batch process monitoring, especially in multistage batch process monitoring. In process monitoring, the process data are sampled at a specified time interval and generated as time sequences. In this paper, we propose a novel order clustering based sub-stage division (OCSD) algorithm which utilizes the order information (time sequence information) of batch...
The looper system in hot strip mills has the features of nonlinearity, strong coupling and uncertainty. To improve the accuracy and quality of control, A new multivariable decoupling control system is proposed in this paper, which consists of diagonally matrix method-based decomposition compensatory unit and sliding mode controller (SMC). Simulation experiments for the conventional control system...
The induction motor easily fails eccentricity fault, which deteriorates performances of motor or even makes the motor break down. In order to reduce financial loss due to eccentricity, it is necessary to detect the fault at its inception. Therefore, in this paper, monitoring the magnetic field of stator yoke is applied to detecting the eccentricity types and the position of minimum air gap in induction...
This paper proposes a novel retinal vessel segmentation based on supervised method in color fundus images. To determine whether a pixel is the vessel pixel or not, 30 features are extracted for each pixel in the fundus image which consisting of features in Gaussian scale space, features by multi-scale Gabor filter and divergence of vector fields. Then we use the features obtained by the previous process...
The increasing use of online monitoring systems for power transmission and distribution networks has led to new challenges for (i) a reliable energy source and (ii) new techniques for satisfying the simultaneous requirements of high-voltage isolation and high energy efficiency in mid-range power transfer. This paper presents a novel concept of insulation strings with simultaneous functions of high-voltage...
Plasma aerodynamic excitation based on surface dielectric discharge is a effective approach for flow control, which can significantly improve the aerodynamic characteristics of the aircraft. However, the plasma excitation interaction region is limited and there are no significant effects by using typical two-electrodes sustained by nanosecond-pulse dielectric barrier discharge, therefore, it is difficult...
Diffuse discharge could achieve glow-like discharge at atmospheric pressure1,2. It is important to understand the physics of the diffuse discharge due to the need for plasma surface treatment and the pure scientific merit. In this paper, characteristics of diffuse discharges in a blade knife-to-plate gap under different power sources and different discharge gap distances are investigated. Two homemade...
Combined with plasma enhanced chemical vapor deposition (PECVD), atmospheric pressure plasma jet (APPJ) can be used for depositing film on polymer surface due to its flexibility and high stability. In this paper, the APPJ is excited by a microsecond-pulse generator, and Hexamethyldisiloxane (HMDSO), working as the reaction precursor, is injected into the APPJ discharge region by the carrier gas (Ar)...
Diffuse discharge can generate large-scale volume discharges at atmospheric pressure1, which could be used in surface modification of metal. In this paper, the feasibility of SiO2-like film deposition on copper surface by atmospheric pressure diffuse discharge is achieved. The diffuse discharge is driven by a microsecond-pulse power supply in a point-to-plate electrode configuration, and HMDSO (the...
This paper presents a novel technique for mapping and exploration using cooperating autonomous underwater vehicles. Rather than using the typical lawnmower sweep pattern to search an entire area, the proposed navigational plan involves guiding the formation directly towards each object of interest in turn, before arriving at a final goal position. This is achieved by the use of traditional artificial...
Applied electric field stimulation (EFS) can reduce extracellular Ca2+ influx and consequently enhance functional recovery after spinal cord injury (SCI). However, the influx of Ca2+ continued through disrupted membranes when EFS completed. As polyethylene glycol (PEG) can reseal the damaged membranes, we proposed a hypothesis that combination therapy of EFS and PEG may effectively prevent Ca2+ influx...
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