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Using spatio-temporal features is popular for action recognition. However, existing methods embed these local features into a global representation. Orders and correlations among local motions of each action are missing. This can make it difficult to distinguish closely related actions. This paper proposes a solution to address this challenge by encoding correlations of movements. Space-time interest...
We present a method that integrates a part-based sparse appearance model in a Bayesian inference framework for tracking targets in video sequences. We formulate the sparse appearance model as a set of smoothed colour histograms corresponding to the object windows detected by the Deformable Part Model (DPM) detector. The data association of each body part between frames is solved based on the position...
Gait is one of the key biometric features that has been widely applied for human identification. Appearance-based features and motion-based features are the two mainly used presentations in the gait recognition. However, appearance-based features are sensitive to the body shape changes and silhouette extraction from real-world images and videos also remains a challenge. As for motion features, due...
Body surface potential mapping (BSPM) can give an insight of heart status in cardiovascular disease diagnosis. However, most special BSPM recording devices are cost and relatively rare. An alternative method is proposed for BSPM recording using two common 64 leads electroencephalogram (EEG) amplifiers. The recording technics includes 117 torso and three limb electrodes of silver-silver chloride, and...
In railway traction applications, due to the limitation of switching frequency and the attempt to fully utilize the DC-link voltage, the traction inverters usually work in six-step (or quasi-square-wave) mode under heavy load or high frequency condition. Meanwhile, DC-link voltage fluctuation, stemming from a common single-phase grid-side power supply, has a great impact on the drive system. To maintain...
As an alternative to classical multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM), MIMO-OFDM with index modulation (MIMO-OFDM-IM), which provides a flexible trade-off between spectral efficiency and error performance, has attracted considerable interest recently. However, in order to detect the active subcarrier indices and modulated symbols precisely, the receiver...
Orthogonal frequency division multiplexing with index modulation (OFDM-IM), which uses the subcarrier indices as a source of information, has attracted considerable interest recently. When the index modulation (IM) technique is applied to filter bank multicarrier (FBMC) system, the intrinsic interferences are partly eliminated but the remaining interferences still affect the bit error rate (BER) performance...
For the miniaturization of two-dimensional autocollimator, a method of using embedded measurement system instead of special host computer is presented. This system integrates CMOS image sensor's driving circuit, frame processing, adaptive exposure control, centroid subdivision and localization of cross, misalignment angle calculation, display driver and other functions within a FPGA chip, and the...
In perspective of increasing environmental degradation, battery packs for electric vehicle is a major focus of study. The battery packs operate at higher current discharge rate to provide enough energy and power to vehicle. During this, enormous amount of heat is generated, which potentially causes safety issues, such as overheating, combustion, explosion. Therefore, the need of design of an efficient...
This paper proposes the two-stage control structure which is composed of battery management unit and central management unit in order to improve the monitoring and management technology of integrated power supply in power system. The paper presents a battery management system (BMS) design scheme. We designed its hardware circuit and verified in the laboratory conditions. The results show that the...
This paper addresses the problem of operating rooms (ORs) planning with different demands from both elective patients and non-elective ones. Two types of uncertainties are incorporated: new arrivals of patients and surgery durations. A time-dependent policy to manage the waiting lists of patients is applied to determine the patient priorities in accordance with urgency levels and waiting times. In...
The application of Product Lifecycle Management (PLM) enables companies to improve the efficiency of product development by considering diversified, personalized and uncertain market requirements. Product configuration, as one of the key functions to enhance mass customization and data management in PLM, manages the product information as well as design experience, and facilitates iterative product...
This paper proposes a simple duty cycle modulated direct torque control (DDTC) for permanent magnet synchronous motors (PMSMs). DDTC sequentially output an active vector and a zero vector during each control period. The duty cycle of active vector is obtained using a duty cycle generator according to the torque error, which can avoid the complex calculation process associated with conventional DDTC...
A 0.14 THz wireless communication system that can transmit data with bit rate of 5 Gbps in real time over more than 21 km is developed. Solid-state power amplifier and vacuum electronic amplifier are cascaded to achieve nearly watts output power. An all solid-state receiver running in room temperature with equivalent noise temperature of 1100 K is used. An experiment over 21 km is carried out with...
In order to predict accurately the radio frequency interference produced by HVDC voltage source converter(VSC-HVDC) valve, based on a ±320kV HVDC modular multilevel converter (MMC-HVDC) station in China, the calculation model was established using the method of moments. Electromagnetic interference characteristic was analyzed by the model in this paper. The near electric field distribution and far...
Cu surface oxide prevents Cu-Cu low temperature bonding and raises contact resistance on bonding interface. Therefore, in this study, formic acid gas was used to treat Cu surface oxide for low temperature bonding and decreasing contact resistance. A pair of new electrode samples were designed and fabricated for contact resistance measurement. It includes many small electrodes located on the whole...
Conventional diffraction tomography (DT) can be used to reconstruct objects under a full view. However, solving inverse problem could be challenging when the full angle data is not available. In this article, a novel diffraction tomographic algorithm with extrapolation method is proposed to detect two-dimensional (2D) dielectric objects in the case that the observation stations are far away from the...
The traditional metering device has some problems in system reliability, electricity-stealing prevention and accuracy. In order to solve the above problems, a new type of integrated high-voltage energy metering device is designed in this paper. The equal potential of the measuring integrated circuit is suspended on the high-voltage side. The AD7753 is used as the core of the electric energy measurement...
Small UAVs (Unmanned Aerial Vehicles) have high potential to be used to detect and manage the diseases of various crops because they are low cost and user-friendly. Objective of this study is to develop a UAV platform to detect sheath blight in rice in the field. A quadrotor UAV equipped with high-resolution RGB-/multispectral camera was developed and images from these sensors were collected over...
At present, China's 3D printing industry has come into the period of "outbreak", where the market growth is accelerated and the relevant technological progress is remarkable. But 3D printing enterprises are difficult to survival and development for completely relying on the market. For an emerging industry, China's government taking what kind of 3D printing policy in different stages is...
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