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In this paper, two multiband MIMO antennas for mobile handsets are proposed. The first antenna is capable of covering GSM900, GSM1800, GSM1900, and UMTS. It has two loop type antenna elements, which are with the same structures and dimensions. The dimensions of the antenna element is 22.5∗25mm2. Two structures which are slot and inverted-L branches on the ground, are used to minimize the mature coupling...
In this paper, a novel experimental solution for the characterization of the binary input impedance of Ultra High Frequency (UHF) band Radio Frequency Identification (RFID) transponder chip is presented. The proposed method is easy to setup using common test instruments. The tag chip is directly soldered to a 50-Ω subminiature A (SMA) connector, and then connected to a vector network analyzer (VNA)...
Quick access and updates of urban road network information is an important part of construction and management. With the rapid development of urban cities, traditional surveying and mapping with long operation cycle and slow data updating as its characteristics already cannot meet the requirements. To solve the problem, this paper puts forward an automatic extraction method of road lines based on...
With the increasing sophistication and maturity of biomedical sensors and the significant advances on low-power circuits and wireless communications technologies, wireless body area networks (WBANs) have emerged recently to provide pervasive health monitoring for humans. In WBANs, smart phones can serve as data sinks to forward the sensing data to back-end servers. Due to the battery concern of smart...
Thanks to the recent advance on power engineering and wireless communications, the smart grid technology has emerged and users are now capable of deploying renewable energy generators and storage devices at their homes. On the other side, due to the rise of environmental consciousness, electric companies are eager to replace traditional generators with renewable energy. One of the most efficient ways...
The China Spallation Neutron Source (CSNS) project is currently under construction in Dongguan city, in the Guangdong province of southern China. The CSNS accelerator consists of an H− linac and a proton rapid cycling synchrotron. The 324MHz RF linac is designed with a beam energy of 81MeV and a peak current of 30mA, which mainly includes one RF Quadrupole (RFQ) accelerator and four Drift Tube Linac...
Software-Defined Networking (SDN) is an innovative and programmable networking architecture, representing the direction of the future network evolution. In this paper, we propose an architecture to introduce traffic classification techniques into the OpenFlow-based SDN network, which enables the network to be application-aware, so the network could distinguish various applications flows and know the...
To improve comprehensive performance of denoising range images, an impulsive noise (IN) denoising method with variable windows is proposed in this paper. Founded on several discriminant criteria, the principles of dropout IN detection and outlier IN detection are provided. Subsequently, a nearest non-IN neighbors searching process and an Index Distance Weighted Mean filter is combined for IN denoising...
We introduce a data acquisition (DAQ) system for frequency-locking in Direct Detection Doppler Wind LIDAR (DWL). In DWL, double-edge technique based on Fabry-Perot etalon is used to detect the frequency shift. Tiny frequency shift could distinctly reflected in amplitude of output pulse from Photomultiplier Tube (PMT). Nevertheless, outgoing laser frequency is sensitive to temperature changes. Moreover,...
Micro-Channel Plate (MCP) with higher quantum efficiency in Extreme Ultraviolet (EUV) region is widely applied in nuclear physics and space environment detection. We will describe a real-time data acquisition (DAQ) system for a two-dimensional MCP Detector, which is readout by a wedge-and-Strip Anode (WSA). We employ the filter and shaping technique. Finally, the resolution mask before the MCP stack...
The in-depth photon counting x-ray detector (PCXD) is a multi-layer detector arrangement which has been introduced to tackle photon count rate limitations of current systems. The capability of resolving photon detections along the detector's depth direction enables multiple measurements in a single scan with energy information that could be potentially utilized for x-ray spectral imaging. The benefit...
Against conventional wisdom, asymmetrical interleaving strategy is proposed for two-phase interleaved LLC resonant DC/DC running at the same switching frequency to guarantee the equilibrium point of current sharing under all operation condition. Basing this strategy, adaptive-voltage-positioning (AVP) concept is further proposed for passive current sharing realization, while satisfying output voltage...
Gigabit Ethernet PHY (GPHY) transceivers find wide use in SoCs and standalone PHY chips with hundreds of millions of ports shipped every year. Transceiver design has recently focused on power reduction driven by the need for higher port density and throughput with minimum energy and thermal cost. The line drivers that deliver power from a high voltage supply to remote 100Ω differential loads dominate...
We report a multiple-grating design of electro-optic PPLN Bragg deflector can be a broadband electro-optic amplitude modulator. Under identical device length, the operation bandwidth of multiple-grating devices can reach 500 nm and >70% diffraction efficiency.
Light fields with shapes similar to those produced from RF function generators are realized. Such fields may be used to dictate the microscopic motion of charged particles in atoms and molecules and in matter.
Flow regulation is a traffic shaping technique, which can be used to improve communication performance with better utilization of network resources in chip multi-processors (CMPs). This paper presents fuzzy flow regulation. Being different from the static flow regulation policy, our system makes regulation decisions fully dynamically according to traffic dynamism and the state of interconnection network...
A novel dual-wavelength actively Q-switched laser was demonstrated. When applying 20 W diode power, the output wavelength can be selected between 1063 and 1342 nm with the peak power of 27.6 and 1.6 kW, respectively.
A stable octave-spanning supercontinuum with excellent beam quality is generated by high-intensity spectral broadening in bulk fused silica plates in a cascaded arrangement.
A game tree search application can be implemented as the malleable parallel jobs that are adapted to various processor allocations. We establish an efficient desktop grid federation to enable the small to mid-sized organizations to perform large-scale game tree search tasks via resource sharing. Due to the uneven task scales of the organizations as well as the dynamic generation/pruning of game tree...
Mining web user trust relationship is important in web information credibility analysis. Motivated by the imprecise nature of trustiness, we propose a novel web user trust prediction method based on evidence theory, which uses user ratings to infer trust relationships between users, where each rating score is treated as an evidence. The method first generates basic probability assignments with training...
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