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Because of hundreds of megahertz bandwidth is a necessary condition for high speed data rates, the millimeter wave band will be used for 5G communication systems. Propagation channel measurements at mm-wave band were conducted in a conference room with an advanced MIMO channel sounder. An omnidirectional antenna at the transmitter and a horn antenna at the receiver were used. The transmitter antenna...
Prognostics and System Health Management (PHM) has a significant influence on improving reliability and security of complex equipment, while embedded information perception and test are a major foundation for the realization of PHM. This paper proposed a novel media access control (MAC) protocol for massive wireless sensor networks which are served by the distributed antenna system (DAS). First, the...
This paper demonstrates a novel electronic nose (e-nose) system for volatile organic compounds (VOCs) detections which is composed of three high-Q piezotransduced single-crystal silicon bulk acoustic resonators (PSBARs) and functionalized with different self-assembled monolayers (SAMs). The different sensitivities of the PSBARs to VOCs are utilized to constitute unique identification codes for IPA,...
We present a highly sensitive miniature low-power scalar optical atomic magnetometer in a gradiometer configuration for operation in the earth's magnetic field. The magnetometer is based on optical pumping of cesium atoms that undergo Larmor precession in the presence of a magnetic field at a frequency proportional to the magnitude of the magnetic field. The two sensors can be operated without crosstalk...
Hybrid electrical vehicles (HEVs) are becoming more and more popular nowadays in automobile market due to virtues such as energy saving, environmental friendly and low noise. A simple mechanical structure called "planetary gears" are widely used in HEVs to allow the internal combustion engine (ICE) constantly working at its high efficiency region and save energy by decoupling the speed of...
The recent novel DC biased sinusoidal current reluctance machines (DC-biased VRMs) are similar to switched reluctance machines (SRMs) in terms of structure, as they both adopt the doubly salient structure and concentrated windings. However, the special characteristic of DC-biased VRMs is that their phase currents have both DC current and AC current. Therefore, it can be inferred that the vibration...
This paper presents a triple-rotor axial-flux spoke-array vernier permanent magnet (TR-AFSAVPM) machine to enhance the performance of vernier machines. By cooperating spoke-array rotor and coil-wounded winding, power factor and torque density of the proposed machines are much improved and their copper utilization is reduced as well comparing with conventional vernier machines. Firstly, the machine...
The quasi-Z-source inverter (QZSI) has been presented suitable for solar photovoltaic applications mainly because of its one stage buck/boost capability and improved reliability. Carefully designed closed-loop control strategy is usually demanded by QZSI in photovoltaic applications for voltage boost, grid-connection and the maximum power point tracking (MPPT). Cascaded QZSI as to further step up...
Double line frequency ripple (2ω ripple) power inherently exists in single phase dc-ac or ac-dc pulse width modulation converters because of instantaneous power unbalance between the dc and ac side. In order to achieve stable operation and maintain a high maximum power point tracking (MPPT) efficiency, traditional single-phase quasi-Z-source inverter (QZSI) for photovoltaic application uses large...
Terahertz time domain spectrometer is becoming an important tool for inspecting the molecular information located in terahertz region. In order to get reliable spectroscopy data, calibration of terahertz spectrum is discussed in this paper. We measured the terahertz absorption spectrum of carbon monoxide (CO) gas with our homemade spectrometer. Comparing the measured absorption frequencies with the...
In this paper, we propose an intelligent nursing bed system which is controlled by a hybrid brain-computer interface (BCI) involving steady-state visual evoked potential (SSVEP) and P300. Specifically, the hybrid BCI includes an asynchronous brain switch based on SSVEP and P300, and a P300-based BCI. The brain switch is used to turn on/off the control system of the electric nursing bed through idle/control...
In order to study the natural contamination characteristics of UHV post porcelain insulator, we tested pollution severity of post insulator for three years which operated in 1000kV Jindongnan UHV AC substation. According to ESDD and NSDD measurement and pollution composition analysis results, a series influence factor of comparative analysis on natural contamination characteristics were performed...
A CMOS-compatible athermal flat-topped silicon Mach-Zehnder filter is proposed and experimentally demonstrated using hybrid strip-slot waveguides. The measured temperature-dependent wavelength shift is −5 pm/K and the minimum insertion loss is 0.4 dB with a device dimensions of 170 pm × 580 pm.
The energy internet paradigm provides a platform to integrate and utilize multiple energy resources through advanced hardware interfaces, communication infrastructure and operational intelligence. In this paper, a robust energy management framework is proposed for dispatching multiple renewable energy resources including solar power, wind power and biomass generation, and flexible loads. In the framework,...
Power system stability has been a fundamental topic in power engineering area. Recently, with the growth of load demand and the utilization of renewable energy, the preventive control of power system transient stability becomes more challenging. Following the trend of applying intelligent approaches to solve stability problems, this paper proposes a decision tree (DT)-based online preventive control...
Load forecasting is an important task in power system operations. Considering the strong correlation between electricity load demand and weather condition, the temperature has always been an input for short-term load forecasting. For day-ahead load forecasting, the whole next-day's temperature forecast (say, hourly or half-hourly forecast) is however sometimes difficult to obtain or suffering from...
Epileptic seizure detection using EEGs is a heavy workload of traditional visual inspection for diagnosing epilepsy. Therefore, more and more research on automatic seizure detection have been developed in recent years. The appropriate feature extraction method and efficient classifier are recognized to be crucial in the successful realization. In this paper, we first create a novel feature extraction...
Expressions are commonly presented through the motions of different facial regions, thus the selection of discriminative features from prominent regions is crucial to the expression recognition. This paper proposes a novel method for facial expression recognition by exploring the most salient regions for each expression. The main contribution of this paper is using the complete feature set of expressions...
In this paper, an optimal ensemble control under dynamic constraints is designed based on multidimensional radau pseudospectral method (MRPM) for inhomogeneous robots. The optimal control scheme exploits the uniform control inputs to steer the robots to the desired distribution while compensating the inhomogeneity of robots. A controllable ensemble system is constructed, in which velocity and acceleration...
This paper is concerned with the problem of robust ℋ∞ filtering for polytopic 2-D discrete-time systems described by the Fornasini-Marchesini model. By constructing a Lyapunov function variation and making use of novel techniques, a parameter-dependent approach is developed to the design of 2-D filters guaranteeing a prescribed ℋ∞ performance, with linear matrix inequality conditions obtained for...
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