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An interesting observation about the well-known AdaBoost algorithm is that, though theory suggests it should overfit when applied to noisy data, experiments indicate it often does not do so in practice. In this paper, we study the behavior of AdaBoost on datasets with one-sided uniform class noise using linear classifiers as the base learner. We show analytically that, under some ideal conditions,...
Direct position determination (DPD) is a single-step method which directly localizes transmitters from sensor outputs without computing intermediate parameters. Compared with conventional two-step localization methods, DPD achieves higher accuracy especially under low signal to noise ratio (SNR) conditions. This paper proposes an improved subspace data fusion (SDF)-based DPD algorithm with a moving...
Non-orthogonal multiple access (NOMA) is a promising radio access technique for the next generation (5G) cellular communication. The optimal power control, user scheduling, and resource allocation scheme to maximize the overall network throughput of downlink NOMA systems is investigated in this paper. A practical imperfect channel state information (CSI) model is adopted in our investigation where...
Because of the extensive application prospect of flexible electronics, a capacitive humidity sensor fabricated on a flexible porous Polytetrafluoroethylene (PTFE) substrate is reported in this paper. Silver nanowires as a floating electrode were dispersed onto a PTFE substrate. Then, as humidity sensitive material, polyimide (PI) was spin-coated onto the silver nanowires. Finally, a pair of interdigitated...
A novel mathematical model of electric vehicle (EV) charging station booking management is proposed. An optimized charging model is formulated to maximizing the charging station's profits and its constraints are the power distribution transformer capacity as well as the number of parking spaces and chargers. The innovation of the model is considering the characteristics of charging power and using...
In this work, we investigate the robustness of 1-transistor-1-resistor (1T1R) synaptic array to implement a low-precision neural network. The experimental results on 1 kb HfOx-based RRAM array show a large on/off ratio (i.e. > 105×) and 5 stable resistance states can be reliably achieved with 10× window between adjacent two states. As the RRAM has the resistance drift over time under read voltage...
Same frequency networking (SFN) technology is widely used in modern wireless network to achieve high area spectrum efficiency. However, it brings the inter-cell interference to the users at the cell edge. Frequency allocation and power control is extensively used to diminish the effect of the interference. Most of the researches are focus on the downlink data transmission due to the fact that the...
With the building of the energy Internet of Things (IoT), the establishment of a private network dedicated to the control and management of the grid to provide reliable and secure power services is attracting more and more attention. Meanwhile, owing to the rapid development of wireless wideband communication technologies, today's wireless communications are increasingly considered by power communication...
With the development of Internet of Things and embedded computing technology, the smart home system has become a hot research spot of embedded systems. In this paper, through combining the Internet of Things, a smart home system based on zigbee and power line carrier communication technology is designed. In addition, the gateway is an important part of the smart home system, and its communication...
This paper mainly focused on the Drag free control system design based on the relative motion description. In this paper, the state space description model of the dynamics of the drag free satellite was established. Based on the analysis of controllability and observability, the state feedback control law was designed. Finally, considering the micro thruster configuration and output characteristics,...
In recent years, the rapid development of geographic information system technology and the popularity of geo-location-based mobile information services have made people pay more attention to geography-related information. Thus, the information retrieval and related services based on geographic has a broad application prospects. However, the traditional search engine for the processing of geographic...
While there is a large amount of text data on the Internet, people need to organize the text data with experienced category. However, the flat structure of categories could not satisfy the modern information management. To solve this problem, we propose a hierarchical classification process with a strategy, called candidates, used to relieve the blocking problems. Besides, we establish the description...
In the era of information explosion, the full-text search engine must index vast amounts of data as soon as possible to provide the best retrieval service. This paper firstly analyzes problems of the traditional stand-alone indexing, and how to solve them by distributed and parallel indexing. Then proposed a distributed indexing algorithm based on the Map/Reduce, which changed the structure of map...
In this paper, the equivalent circuit model of UTC-HPT is established to simplify the microwave optical amplifier and mixer design. Based on the equivalent circuit model of HBTs, the photo-generated current in UTC-HPT is introduced reasonably as part of base current. The influence of photogenerated carriers on several equivalent circuit components such as trans-conductance, barrier capacitor, diffusion...
From the theoretical point of view, in the case of uncertain factors, the paper study the optimal pricing strategy of the delivery platform under Stackelberg game model. Through numerical experiments, the change of uncertain factors is studied, the results show that the takeaway platform operators will benefit from lower uncertain degrees of the merchant's cost and takeaway platform operators' substitutability.
In this paper, we propose a novel design of strong Physical Unclonable Function (PUF) leveraging the sneak paths in the resistive cross-point (X-point) array for device authentication. The entanglement of the sneak paths in the X-point array greatly enhances the entropy of the physical system, thereby increasing the space of challenge-response pairs (CRPs). “Digital” resistance distribution in X-point...
Modern variable frequency drives (VFDs) are employed in various industry applications. The machine windings may be subject to large overvoltage, called reflected wave phenomena (RWP), if long cables are used or fast voltage rise times are implemented in the VFD system. The overvoltage places high electrical stress on the machine terminal windings, in the long term resulting in the winding insulation...
The use of vibration mode localization in arrays of mechanically-coupled, nearly identical cantilevers has been studied for ultra-sensitive mass detection and analyte identification. The effects of geometrical design of the coupling overhang, cantilever length, as well as the number of identical coupled cantilevers on the magnitude enhancement with a small mass perturbation were previously reported...
Path planning plays an important role in autonomous mobile robot. A lot of methods have been proposed in several decades. However, the complex environment in the real world becomes more challenging for robots. This paper conducts an experiment on evaluating path planning methods under different scenes. Four basic space configurations corresponding to specific indoor scenes are proposed. At the same...
Physical Unclonable Function (PUF) based on high-density RRAM array is suitable for hardware security applications. In this work, an RRAM-based strong PUF leveraging random resistance variation is experimentally demonstrated. The number of challenge response pairs increase significantly compared with the previous weak PUF design. The PUF reliability is optimized through extending the resistance distribution,...
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