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By analyzing the disadvantages of the traditional KNN using lazy learning that directly classify the data based on the K neighboring classes using the majority voting method, a new Sigmoid weighted classification algorithm WKS (Weighted KNN Based On Sigmoid) was proposed. WKS provides a new method for learning and training, since each training data di ∊ D contributes to the correct classification...
Contrary information is recorded in the process of Ribonucleic Acid transcription, which is similar to the anti-synchronization process. In this paper, the anti-synchronization of coupled Boolean networks is investigated. Firstly, the definition of anti-synchronization is introduced, and the drive-response Boolean networks dynamics are translated into linear representations with the semi-tensor product...
As an effective method in dealing with the massive data, the serial processing, aiming to obtain the useful information quickly, cannot satisfy our calculation requirements with high-performance. However, both distributed computing and parallel computing are good choices in calculating high-volume data with high-performance. As a parallel computing framework based on memory computing large data, Spark...
To improve the mobility of locomotive devices on loose, sandy terrain, protrusions or convex patterns called lugs (i.e., grousers) are attached to the surface of a locomotive modulus. Following our previous study, in which the effects of angular speed, lug sinkage length, and soil cumulative deformation on lug-soil interaction forces during the fixed-axis rotational motion were experimentally confirmed,...
Storage efficiency of the automated warehouse directly affects the overall efficiency of tobacco logistics, in order to reduce the idle rate, a slotting optimization method is proposed by the combination of fault tree analysis and field test in this paper. First, the Pareto diagram is used to analyze the warehouse slotting usage situation. Then, obtain the key factors of the idle goods allocation...
Cognitive radio (CR) is an effective way to improve the utilization of spectrum resource. This paper focuses on the resource allocation in cooperative relay cognitive radio networks and proposes an optimized resource allocation algorithm. In the algorithm, when the channel between the primary source and destination is good, the primary user (PU) selects a best sub-channel to transmit its data directly,...
Collaborative development of large-scale aviation software products across organizational boundaries adds new challenges to existing software engineering processes. In this paper, we propose a novel, linked data approach for handling the diverse software artifacts by adapting features from social network sites. The linked data is introduced into software engineering domain, which connects software...
This paper presents a numerical simulation of electromagnetic scattering from surface wakes excited by a submerged object over two-dimensional sea surface. Based on the thin ship theory, an open software is presented for the geometric modeling of wake including Bernoulli hump and Kelvin wake. Then the scattering coefficient calculations are carried out by using the second order small slope approximation...
This paper investigates the performance of underwater visible light communications (UVLC) systems employing multiple transmitters and/or multiple receivers to exploit the advantage of spatial diversity. Experimental results are further provided to evaluate the error performance of single input multiple outputs (SIMO), multiple inputs single output (MISO) and multiple inputs multiple outputs (MIMO)...
An 117 Gbit/s short range high speed optical interconnection using DMT modulation and adaptive DPD-PTS algorithm is proposed. By comparison with the traditional DPD algorithm, the simulation results show that the DPD-PTS used in the proposed scheme may achieve higher performance without complex equalization algorithm and dispersion compensation, and thus 117 Gbit/s DMT signal can be transmitted over...
In this paper, we present a monolithic vertical integration of a 850nm wavelength AlGaAs/GaAs-based vertical-cavity surface-emitting laser (VCSEL) and a 810nm wavelength AlGaAs/GaAs-based resonant cavity enhanced photodetector(RCE-PD). The receiving and transmitting of optical signals on two different wavelengths can be realized simultaneously by the single transceiving chip. Simulations show that,...
In this paper, we demonstrated a passively mode-locked erbium-doped fiber laser by incorporating a microfiber-based tungsten diselenide (WSe2) saturable absorber (SA). We obtained stable mode-locking with pulse duration of 1.2 ps, repetition rate of 2.6 MHz and signal-to-noise ratio (SNR) of 66 dB at maximum pump power of 400 mW. The experimental results show that CVD-grown WSe2 film can serve as...
An all-optical encryption/decryption scheme for 10-Gbaud quadrature phase shift keying (QPSK) and binary phase shift keying (BPSK) signals based on hybrid modulation formats exclusive-or (HMF-XOR) gates is proposed. Both theoretical analysis and simulation results are conducted to evaluate the feasibility of optical encryption/decryption scheme. The received OSNR penalties of decrypted QPSK and BPSK...
We propose a power efficient multiple access scheme for visible light communications (VLC) based on the block interleaved frequency division multiple access (B-IFDMA), which provides large frequency-diversity, flexible bandwidth allocation, low complexity of channel equalization and user separation. The impact of the number of subcarrier per block on the transmission performance under wireless optical...
We propose a scheme of ultraviolet (UV) communication system, with polar channel coding method. The bit error rate (BER) performance of the UV polar code scheme is analyzed by simulations and offline experiments, in contrast with low-density parity-check (LDPC) scheme. Results suggest that the polar code scheme has a better BER performance than LDPC scheme in the UV communication system.
Detection of trace chemicals sensitively and selectively is important for environmental, safety and industrial process monitoring. Based on erbium-doped photonic crystal fibre (ED-PCF) laser intra-cavity absorption spectroscopy detection technology, analyzing the infrared absorption spectrum of acetylene (C2H2) gas. The relationship between the gas concentration and the absorption of C2H2 at the normal...
We experimentally demonstrate an indoor visible light positioning system based on optical camera communications, in which the transmitted coordinate data are spatially separated and demodulated by a camera. The receiver's position is calculated based on the coordinates of light-emitting diodes in the real word and in the image.
A service-aware dynamic bandwidth allocation with CoMP is proposed in the heterogeneous 5G fronthaul network. Simulation results show that the throughput and delay performance of users have been improved, and the QoS for high priority users can be guaranteed preferentially.
We report, for the first time to our knowledge, the usage of CVD-grown few-layer WSe2 as a saturable absorber for the mode locking of a thulium-doped fiber laser. The WSe2 saturable absorber was deposited on the waist of the tapered fiber. By employing the WSe2 saturable absorber, we demonstrate a passively mode-locked fiber laser operating at 1863.96 nm with a 3 dB spectral bandwidth of 2.89 nm....
In this paper, we proposed a bandwidth-variable TWDM access network structure which could simultaneously support upstream, downstream and peer-to-peer (PtP) communication directly inter ONUs based on the LCoS-based tunable bandwidth WSS in RN. The WSS improve the network flexibility due to its scalable technology and programmable filtering characteristics. Equivalent experiments are performed to demonstrate...
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