Linear and nonlinear impairments severely limit the transmission performance of high-speed visible light communication systems. Neural network-based equalizers have been applied to optical systems, which enables significantly improved system performance, such as data rate distance. In this paper, a memory-controlled deep long short-term memory (LSTM) neural network post-equalizer is proposed mitigate both linear in pulse amplitude modulation (PAM) based (VLC) Both 1.15-Gbps PAM4 0.9Gbps PAM8...

Solar heating is generally regarded as a clean and low-carbon method, while its high initial investment hinders promotion in economically underdeveloped areas. With the implementation of policy proposal carbon neutralization target, rural bulk coal northern China restricted. The Chinese government proposes to widely adopt solar meet demands residents. In this research, application assisted heat pump system Beijing, Tianjin, Hebei surrounding areas numerically simulated. A life cycle...

Construction and demolition (C&D) waste has seriously affected the ecological environment. The utilization of C&D resources can greatly alleviate this problem, it is an important way to help achieve goal zero carbon in 2050. In study, insulation concrete blocks were developed with recycled aggregates, cement, fly ash as main raw materials, expanded polystyrene (EPS) boards block filling material, self-developed construction composite activator, interface enhancer, surface modifier other...

As a promising candidate technology for the next generation communication systems, visible light (VLC), combined with high modulation and coding schemes, can be used to achieve throughput much higher than traditional RF wireless ones. We propose adopting multiple light-emitting diodes (LEDs) on transmit side form multiple-input signal-output (MISO) VLC system. Through maximum ratio beamforming, signals from LEDs added coherently at receiver side, and, therefore, signal-to-noise of system...

Food safety is a global problem with large impact on human health and high level of priority for governments. Supply chain traceability key to enable food safety, since it allows problems be traced their source. Moreover, regulatory agencies understand where risk enters into the supply chain, offers major disincentive upstream agricultural businesses engaging in economically motivated adulteration. Despite its importance, there has been little empirical research what factors are associated...

Abstract The behavior of amphiphilic copolymer chains in a solvent is not the same as that homopolymers. As an important synthetic biomaterial, poly(ethylene glycol)‐ b ‐poly(lactic acid) copolymers are often dissolved tetrahydrofuran (THF) for study. Few studies have focused on potential aggregation and compact conformation macromolecules THF solution. In this study, series diblock were synthesized characterized using fourier‐transform infrared spectroscopy, nuclear magnetic resonance,...

The operation and trade of the electricity distribution market must develop based on a clear pricing mechanism. Current nodal price generally does not include network costs, which is conducive to establishment efficient use network. Therefore, Ramsay criterion further considering influence reactive power, method allocating cost proposed in this paper. main innovation paper that calculation elasticity power demand established. Consequently, allocated nodes according only active distributed...

Abstract Bird strikes occur frequently at airports throughout the country, which poses a serious threat to flight safety. Birds have different risks aircraft because of their characteristics and habits. Principal component analysis was carried out based on bird survey data Zhuhai Airport optimize strike risk evaluation index system. FCM algorithm combined with Xie-Beni effectiveness is introduced construct model. The results show that 29 common species Xinzheng in accordance level can be...

In this paper, we propose and demonstrate a power diversity scheme joint superposed signal to realize the spatial multiplexing in formulated 2×2 Visible Light Communication (VLC) Multiple Input Output (MIMO) system. Various structures are achieved by setting proportionality factor, which used multiply transmitted signal. Subsequently, employ Look-Up Table (LUT) separate signals each Receiver (Rx). A data rate of 1.75Gbit/s is over 1.05-m with Bit Error Rate (BER) less than threshold.

In the current stage of urbanization in China, urban construction has gradually shifted from incremental dominated by real estate to stock transformation based on improving quality. The evaluation renewal projects is crucial for decision-making and resource allocation. However, there no consensus indicators methods. This study evaluates status quality using MABAC method numerical indicators. It improvement VIKOR public satisfaction found that comprehensive weights subjective five first-level...

Non-intrusive load monitoring (NILM) was one of the developing direction future monitoring, which could provide technical support for management demand response. When transient characteristics are used NILM, detection state change is vital, because accurate detecting solid basis analysis characteristics. In this paper, an improved permutation entropy (PE) algorithm proposed, aiming at promoting performance PE about its anti-noise capability and appropriate sampling window. The main points as...

At present, in the era of increasingly updated digital tools and resources, effective design implementation learning systems is key to improving quality services. The purpose this paper obtain comprehensive objective real needs users through existing user data, make full use real-time online behavior data "ideas" potential users, then next stage system suitable for designated users. First all, article transforms characteristics into that can be designed calculated by collecting information...

In recent years, with the popularization of intelligent devices, there have been more and low-headed individuals in classroom, seriously affecting quality classroom learning. To address this issue, article first uses high-definition cameras to capture real-time situation obtained image information as input samples into neural network algorithm; Secondly, a combination convolutional (CNN) recurrent (RNN) was used improve accuracy robustness head rate detection. Subsequently, large number...

The fundamental way to reduce the risk of bird strike is manage ecological environment airport and its surrounding areas affect chain birds. Based on a comprehensive survey animal plant populations in Meizhou airport, an network established, improved cascading failure model coupled map lattices introduced simulate robustness vulnerability network. It found that will be collapsed around five time series one after another under external attack. also shows have global breakdown very small...