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The photoelectric conversion efficiency of photovoltaic cells is mainly affected by two factors, two factors are the operating temperature of the photovoltaic cell and the irradiance of the sun. In order to improve the photoelectric conversion efficiency of photovoltaic cells, combining with the two factors that affect photoelectric conversion efficiency of photovoltaic cells and the merits and demerits...
Nowadays the phase controlled switching is a preferred method for capacitive switching. Thus the distribution of prestrike gaps is an important issue for the control strategy. The objective of this paper is to understand the distribution of prestrike gaps for the contact materials manufactured by arc-melted and infiltration preparing technology in the capacitive service condition of 40.5kV vacuum...
In this paper, a reconfigurable frequency selective surface (RFSS) with multiband characteristic has been proposed. The proposed RFSS is composed of two FSS layers separated by a thin dielectric substrate. The top FSS layer is composed of modified cross-dipole element and the bottom layer is wire grid of the same periodicity. By placing high frequency switch PIN diodes between the modified cross-dipole...
We presented a 32-channel silicon hybrid demultiplexer fabricated with CMOS technology. Double-etched mode converter and wide arrayed waveguide are used to improve AWG performances while the counter-tapered coupler is optimized for broadband mode multiplexing.
This paper studies the system of Electric-field Coupled Power Transfer (ECPT) based on the E-class amplifier topology. An CLC-S-compensated circuit topology is applied at the primary side to resonate with the power transmitting plates. The voltage gain model is presented with the help of the impedance transformation principle. There are three system parameters (the load quality factor Q, the normalized...
We present an analytical model of the drift in the air-core photonic-bandgap fiber (PBF) resonator optic gyroscope caused by temperature-driven polarization instability. Air-core PBF resonator based on micro-optical structure has been demonstrated and the finesse of the resonator is 7.5. Experimental results show that the gyro bias stability still seriously affected by the thermally induced polarization...
In this paper, we propose the first deep reinforce-ment learning framework to estimate the optimal Dynamic Treat-ment Regimes from observational medical data. This framework is more flexible and adaptive for high dimensional action and state spaces than existing reinforcement learning methods to model real life complexity in heterogeneous disease progression and treatment choices, with the goal to...
The deionized water dielectric is widely used as the cooling medium of the inner cooling system for HV converter valves. Theoretically, the electrolytic current in the cooling water is considered as one of the predominant causes of the corrosion of the aluminum heat sinks. The distribution of the electrolytic current inside the heat sink is revealed by simulating calculation. Corrosion tests with...
Forced convection of insulation oil is the main heat transfer mode in large power and ultra high voltage (UHV) transformers. The electrification risk caused by friction between mineral oil and pressboard has been suspected to be responsible for several failures. The electrification measurement was carried out in a rotation system. The influences of oil temperature, rotation speed, time, and applied...
The corrosion of aluminum heat sinks has been proved to be the leading cause of many operation problems in the inner cooling system of HV converter valves. The distribution of the electrolytic current through the full-aluminum heat sink or the heat sink embedded with annular electrodes is revealed by the simulating calculation. Two experimental setups of simulated cooling systems were established...
Automatic decision-making approaches, such as reinforcement learning (RL), have been applied to (partially) solve the resource allocation problem adaptively in the cloudcomputing system. However, a complete cloud resource allocation framework exhibits high dimensions in state and action spaces, which prohibit the usefulness of traditional RL techniques. In addition, high power consumption has become...
As human is the final receptor of images, user-perceptive quality of images need to be scaled by subjective quality assessment method, which is also important for learning a high performance of objective image quality assessment model. There are characteristics of randomness and individual difference among subjective testers. Those scores made by unreliable subjects that may affect the scaling of...
Our IM/DD techniques investigations are reviewed. Poly-binary is low complexity and good for the 5G fronthaul and DCI scenarios while DMT is suitable for metro transmission due to better bandwidth utilization and higher dispersion tolerance.
When a mobile device connects to a telecom network (e.g., GSM 2G, CDMA 3G and LTE 4G), the network generates measurement report (MR) data containing signal conditions to support communication services. Using MR data to predict the accurate position of a mobile device is an important problem in Telco industry, called Telco localization problem. Although the literatures have proposed various MR-based...
Power transformer is one of the most expensive equipment and plays a vital role in power transmission and distribution (T&D) systems. This paper presents a comprehensive risk assessment method of transformers, which integrates the operating condition of transformer and the consequences of transformer failure. Health index provides a practical tool for evaluating the state of transformers. Meanwhile,...
Telecommunication (Telco) localization is a technique to accurately locate mobile devices (MDs) using measurement report (MR) data, and has been widely used in Telco industry. Many techniques have been proposed, including measurement-based statistical algorithms, fingerprinting algorithms and different machine learning-based algorithms. However, it has not been well studied yet on how these algorithms...
The underlying infrastructure of cloud computing relies on data centers monitored and maintained by the cloud service providers. Data centers usually incur enormous power consumption and are expected to have a significant impact on the local power grid due to dramatically increasing power consumption and fluctuation. In order to mitigate such fluctuation and balance the power demand and supply in...
We demonstrate a 56 Gb/s DMT signal using a compact silicon microring modulator. The measured bit error rate of back to back modulated signal is well below the FEC limit.
Visual object tracking is a fundamental task in many high-level computer vision applications. Most existing algorithms have to build complex models with expensive computation to achieve accurate object tracking, which brings significant difficulty in real-time tracking. In order to address this problem, motivated by recent success of high-speed correlation filter (CF) models, a novel real-time object...
Recent research indicates that the well known scale invariance property of natural images may originate from the existence of the critical image layer exhibiting phase transition from disordered to ordered states as the intensity scale increases. In this paper we examine the impact of phase transition on perceptual quality assessment of images and confirm that using only the ordered or structured...
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