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When the use of wireless sensors network is becoming increasingly wider and deeper, its problems are also beginning to highlight. Due to the limit of wireless sensors' energy supply and the unstable channel, ensuring the reliability and speed of the transmission has become the research hot spot. With multipath or retransmission transmission mechanism, the redundancy of data transmission can be ensured...
A new generator control unit (GCU) must be designed to work in a wide frequency range in order to obtain better control performance in variable frequency AC power system. Control algorithms make improvements in terms of determining the control parameters and analyze the influence of the controller parameters on system stability, and compensate for the loss of signals generated in the conditioning...
This paper proposes a passive UHF RFID indoor localization system for both tag and tag-free target based on interference. We take number of tags as landmarks and interpolate virtual tags using nature-neighbour interpolation. We monitor the interference by measuring the phase difference of reference tags. Two situations are considered: on the ground and in free-space. When tag or tag-free target is...
Multipath transport can simultaneously utilize many interfaces of a terminal to maximize the transfer throughput. However, when sharing the same bottleneck link with single-path flows, the multipath flows will occupy more network bandwidth and it will lead to the unfairness of resource allocation. In this paper, we propose a Congestion Control method with Fairness (CCMF) for multipath transport. CCMF...
For gold exploration and sustainable exploitation, it has great significance for the genesis of gold deposit mineralization enrichment regularity. Jiaodong area is one of the most important gold producing areas in China, whose reserves account for about 1 /3 of proven rock gold reserves in China. In this paper, we take northwest of Jiaodong gold concentration area, the eastern side of Yishu fault...
According to the trolley side impact condition of UN R129 children restraint system, 2 kinds of simulation test methods were developed and the feasibility was verified. Based on the validated test method, the numerical simulation of side impact in 3 different restraint systems (5-point-car seat belt, 5-point-ISOFIX and shield-car seat belt) with Q3 child FE dummy model was adopted. The kinematic response...
Utilizing the Kalman filter-based averaging scheme, we demonstrated THz dual-comb spectroscopy covering 282 GHz at ∼2.8 THz with unstabilized quantum cascade laser frequency combs. The peak signal-to-noise ratio(SNR) is 60 dB within 100 us averaging.
Aiming at language model (LM) adaptation for interactive speech transcription, this paper proposes a topic-based adaptation method using users' correction information. To infer the topic for each utterance in continuous speech, this method uses the correction information of history utterances adjacent to the current one. Perplexity is calculated for topic inference. Topic-related LMs are interpolated...
Embedding virtual network requests in an underlying physical infrastructure, the so-called virtual network embedding (VNE) problem, has attracted significant research interests already. A realistic scenario might entail embedding multiple VN requests (MVNE) that arrive simultaneously (batch arrivals). The existing heuristic MVNE approaches neither consider the coordination among multiple VNR embeddings...
Intelligent robot such as Unmanned Ground Mobile Robot or Vehicle is a kind of automatic equipment without a manual operation to complete the task. This paper presents a method of trajectory planning for intelligent robots based on the ant colony algorithm under an environment with obstacles. The robot can autonomously avoid obstacles from the starting point to reach the target point during maneuver...
Wireless caching at users' devices in mobile social network is considered to be a promising solution to alleviate backhaul overload in future wireless networks. However, most of the current works propose caching schemes based on heuristic reasoning and intuition with poor performance or high complexity which are impractical due to individual devices' computing capacity restriction. In this paper,...
Due to the scarcity of the licensed spectrum, Licensed-Assisted Access Long-Term Evolution (LAA- LTE) network can be deployed in unlicensed spectrum, which is currently occupied by different Wi-Fi systems. It is a very challenging problem to ensure fair coexistence between LAA-LTE and Wi-Fi networks, in terms of spectrum sharing and traffic management. To solve this problem, a Fair Downlink Traffic...
In this paper, we propose a novel iterative algorithm based on successive convex approximation for the nonconvex energy efficiency optimization problem in massive MIMO networks. The stationary points of the original problem are found by solving a sequence of successively refined approximate problems, and the proposed algorithm has the following advantages: 1) fast convergence as the structure of the...
A substantial number of de-identified healthcare big databases have recently become available, where they are mostly used separately to approach domain-specific research problems. However, if integrated, the databases will become richer and more beneficial for secondary use in healthcare services and solutions research and will facilitate doing research on a broader range of healthcare research projects...
A novel design scheme using neuron-MOS dynamic literal circuit and double pass-transistor logic(DPL), to realize voltage-mode dynamic ternary logic gate, is proposed. The double pass-transistor used to transmit ternary signal is controlled by the output of the dynamic literal circuit to realize ternary logic function. The complementarity and duality principles for generation of dynamic ternary complementary...
With the increasing development of cloud computing, how to securely outsource prohibitively expensive computation to unfaithful clouds has caught more and more attention. Large-scale systems of linear matrix equations (LME) are com-monly deployed in scientific and engineering fields, which is a computationally complex task. Thus, it is necessary to design a protocol for practically outsourcing large-scale...
In wireless sensor networks (WSNs), there usually exist spatial overlap and data correlation among sensors. Reducing data redundancy is crucial for prolonging network lifetime inWSNs. Source coding is an effective method for data aggregation to reduce data redundancy. However, source coding was regarded as an independent problem in previous work. Little work pays attention to optimal coding rate and...
Feature selection methods have been widely used in gene expression analysis to identify differentially expressed genes and explore potential biomarkers for complex diseases. While a lot of studies have shown that incorporating feature structure information can greatly enhance the performance of feature selection algorithms, and genes naturally fall into groups with regard to common function and co-regulation,...
With the rapid development of high-speed and heavy-haul railways, the security of railway is increasingly important. Under the combined actions of tension, compression, distortion, and shear stress, the railway axle material is prone to fatigue damage. Defects in the axle press-fit area can only be detected by using ultrasonic testing methods, with ultrasonic probes coupled to the axle journal, the...
With the deregulation of power market and integration of large-scale intermittent renewable generation, the operation of modern power system is faced with more and more uncertain factors. Traditional deterministic methods are hard to meet the requirements for the analysis and control of power system under uncertainty. Therefore, it's necessary to introduce risk assessment methods into the daily operation...
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