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Localization has always been a topic of concern in transportation and construction management. Radio frequency identification (RFID) has promising potentials due to their practically unlimited identification capacity, lower power and light weight. The objective of this research is to develop localization algorithms using RFID technology and analyse which is possible algorithm indoor environment. To...
Identifying the most recent heavy hitters, i.e., finding the items with the highest appearances in a high speed data stream is a fundamental problem in real-time stream processing. The requirement of real-time stream applications raises significant challenges to this problem in terms of the processing latency, the space usage and the precision. Traditional schemes leverage the sliding windows based...
Taking the evanescent vacuum provided by a silver or dielectric single-mode nanowire as electromagnetic background, we theoretically demonstrated the enhanced reversible photon-exciton interaction and fluorescence collection efficiency through the careful optical mode design.
A hybrid balancing approach that combines active and passive balancing is presented for a modular battery management system (BMS) in electric-drive vehicles. The hybrid system combines advantages of module-level active balancing with cost-effectiveness of cell-level passive balancing. A module consists of a number of cells connected in series, with cell-level passive balancing performed within a module,...
This paper proposes a supervisory optimal control structure for the micro-gas-turbine based combined cooling heating and power (MGT-CCHP) system. In the upper layer of the structure, a dynamic optimal reference governor is developed to calculate the optimal operating points according to the given economic performance indexes, and in the lower layer of the structure, model predictive control is utilized...
Modeling and simulation have shown essential for forecasting load and resource availability in large-scale complex scenarios. The growth of urban environments, as well as the use of ICT in enabling applications and services, has encouraged several works on the modeling of transportation. High mobility of vehicles in such a context consists of a significant challenge in modeling traffic. Several microscopic...
Real-world stream data with skewed distribution raises unique challenges to distributed stream processing systems. Existing stream workload partitioning schemes usually use a “one size fits all” design, which leverage either a shuffle grouping or a key grouping strategy for partitioning the stream workloads among multiple processing units, leading to notable problems of unsatisfied system throughput...
In this paper, we consider a time-slotted energy harvesting (EH) cognitive radio (CR) network, where the secondary user (SU) is powered by a continual source of energy harvested from ambient environment. Jointly considering the primary user activity on the primary channel, diversity of channel conditions, energy replenishment process as well as the imperfection of spectrum sensing, the SU aims to...
A novel on-line auto-tuning PI control algorithm for the superheat of the evaporator is proposed in this paper. A first-order plus dead-time model is firstly employed to describe the system process, and the model parameters are obtained from the robust identification algorithm using the on-line experimental data. Then, a PI controller, whose parameters are tuned by the Ziegler-Nichols method, is designed...
Texture classification has been extensively studied in computer vision. Recent research shows that the combination of Fisher vector (FV) encoding and convolutional neural network (CNN) provides significant improvement in texture classification over the previous feature representation methods. However, by truncating the CNN model at the last convolutional layer, the CNN-based FV descriptors would not...
Applying Flexsim system simulation software to build the simulation model of logistics sorting system. Before the introduction of automatic sorting equipment and technology in the sorting system, through the establishment of the Flexsim simulation model to simulate, analyze and evaluate the design scheme.
Robots have the potential to provide tremendous support to disabled and elderly people in their everyday tasks, such as dressing. Many recent studies on robotic dressing assistance usually view dressing as a trajectory planning problem. However, the user movements during the dressing process are rarely taken into account, which often leads to the failures of the planned trajectory and may put the...
In order to meet the wide-range load tracking requirement and overcome unknown disturbance issues of ultra-supercritical (USC) boiler-turbine unit, an extended state observer based fuzzy model predictive controller is proposed using the techniques of fuzzy scheduling, model predictive control and extended state observer. Local state-space models are established on the basis of nonlinearity analysis...
The Beaglebone Black single-board computer is well-suited for real-time embedded applications because its system-on-a-chip contains two "Programmable Real-time Units" (PRUs): 200-MHz microcontrollers that run concurrently with the main 1-GHz CPU that runs Linux. This paper introduces "Cyclops": a web-browser-based IDE that facilitates the development of embedded applications on...
In this paper, a new method of measuring the emission characteristics of phased array transmitter by receiving antenna array is proposed. Compared to traditional method that only gets the suppression of harmonic and spurious emission, the proposed method that based on direction-of-arrival (DOA) estimation and broadband sweep measurement also measures the effect of spatial power-combining which is...
In this paper we demonstrate the 4 level pulse amplitude modulation (PAM-4) signal generation through a silicon Mach-Zehnder modulator. The baud speed of the PAM-4 signal generation is characterized up to 32 Gbaud (64Gb/s). And we have measured the device's bit error rate (BER) up to 32 Gbaud and the spurious free dynamic range (SFDR) of the distortion component of the modulated light.
As the rapid development of Electric Vehicles (EV), battery aging phenomenon becomes an emerging and challenging question to EV communities. However, battery degradation in real-life EV use has been discussed little. In this paper, by analyzing a large scale electric taxi GPS and deal data, we make the first attempt to investigate this problem. A case in Shenzhen is analyzed in this paper, where BYD...
Bus service is an important public transportation. Besides the major goal of carrying passengers around, providing accurate and reliable travel information for passengers is also an important business consideration. The route and its traveling time can directly affect the number of people choosing the line. Traditional approaches to obtain route and its traveling time rely on historical experience,...
With the rapid development of rail transit, urban rail transit network is increasingly becoming complex due to the intersection of the different operating lines. In order to guarantee the convenience of passenger's travel, most domestic the existing metro system passengers' records are only retrieved at entry and exit points. With such a system, it is difficult to track the passengers' complete path...
A compact microstrip lowpass filter (LPF) with ultra-wide stopband using transformed stepped impedance hairpin resonator is proposed. The transformed resonator consists of a stepped impedance hairpin resonator and an embedded hexagon stub loaded coupled-line structure. Without enlarging the size, the embedded structure is introduced to get a broad stopband. A prototype LPF has been simulated, fabricated...
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