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We introduce a multi-frequency finite-difference frequency-domain algorithm for active nanophotonic devices simulations from first principles. This algorithm overcomes large time-scale differences between optical and modulation frequencies and efficiently simulates performances of modulated devices.
We present a comprehensive photonic approach for passive cooling of solar cells by simultaneously performing radiative cooling while also selectively utilizing the sunlight. We design a photonic cooler made of multilayer dielectric stack that can strongly radiate heat through its thermal radiation while also significantly reflecting the solar spectrum in sub-band gap and ultraviolet regime. We show...
Surface plasmons (SPs), collective oscillation of electrons at metal/dielectric interface, carry electromagnetic energy in the form of surface-bound propagating wave, offering promising novel applications in various fields. Plasmonics, however, commonly suffers from large absorption losses (propagation length <<100 μm) limiting the potential of practical applications. In this work we developed...
This paper presents a smart badge system for managing museum visitors and improving their viewing experience. The badge uses a LoRa wireless interface for two-way long-distance communication with tour guides and the museum’s control center. The control center can collect information such as the visitors’ viewing preferences, location, and status of activity level, enabling it to wirelessly send suggestions...
With the rapid development of mobile intelligent terminal, an increasing number of mobile phones operating systems also came into being. Android system has become one of the most popular device operating systems, which prolongs its attention. Considering the legal requirement in communication security, the Android kernel encryption mechanism for analysis and summary of the Android kernel based on...
Recommender systems benefit people's daily lives at every moment. While considerable attentions have been drawn by performance in one-step recommendation and static user-item network, recommenders' performance on temporally evolving networks remains unclear. To address this issue, this paper firstly adopts a bipartite network to describe the online commercial system. We then propose a network evolution...
In this paper, we propose a deconvolution method which removes the motion blur along the blurring paths. The 2-D blurred image is transformed into 1-D horizontal blurred vectors along the blurring paths. Hence, the deconvolution of stacked horizontal blurred vectors is implemented in an iterative deconvolution process by a 1-D image restoration method that saves computation time. The deconvolution...
We introduce a synthetic frequency dimension in a one dimensional array of ring resonator system and generalize the concept of photonic gauge potential. A topologically protected edge state is created in the synthetic space.
Partial shading conditions are inevitable especially in building-integrated photovoltaic (PV) systems. Detection of partial shading is vital for monitoring and supervising purposes as well as invoking global maximum power point tracking (MPPT) algorithms. Normally, a sudden big change in output power is used as a partial shading occurrence indicator. However, it cannot ensure detection accuracy. Utilizing...
As the development of high-throughput techniques in both biology and its related disciplines (chemistry or medicine), the huge number of biological entries are available. The discovered relationship between them (e.g. interactions or associations) reveals important biological facts, which are never found in individual-based biological experiments. A biological network is an appropriate tool to systematically...
There is an urgent need to discover or predict DDIs, which would cause serious adverse drug reactions. However, preclinical detection of DDIs bear high cost. Similarity-based computational approaches can be the assistance of experimental approaches. Utilizing pre-market drug similarities, they are able to predict DDIs on a large scale. However, they neglect the topological structure among DDIs and...
This paper introduces a novel current coordinated q-axis Field-Oriented Control (q-axis FOC) on EESM. This novel control strategy breaks through the conventional T/V limit, enhances the motor overload capability and enhances the torque variation rate enormously. In this paper, a thorough theoretical analysis on q-axis FOC, from phasor diagram plotting, mathematical modeling to equivalent circuit and...
An accurate measurement of the solar irradiance is of importance for evaluating and developing of solar renewable energy systems. However, devices for solar irradiance sensing (e.g. pyranometers and pyrheliometers) are usually expensive and difficult to calibrate. In this paper, a low-cost soft-sensor, implemented with a solar cell, is proposed for real-time estimation of solar irradiance. It applies...
This article compares several different heat supply systems based on heat recovery from exhaust steam. Thermal and electrical parameters are compared among different heat-supply systems of 300MW Units such as traditional extraction condensing turbine system, small temperature difference heat-supply system and large temperature difference heat-supply system. When the large temperature difference heat-supply...
In big data era, the changes of data form, data acquisition and data exchange have increased the difficulty in processing data credibility and isomerism, as a result, it ' s difficult to solve the critical knowledge bottleneck of service combination scheduling model. Service scheduling process, analysis of credibility and functional data acquisition is very important, further more, most of the current...
In big data era, service scheduling process, analysis of credibility and functional data acquisition is very important, so, this paper starts from dissecting the data features, the variation function is employed to fit the features of data isomerism and to draw the scattered point cloud of data space distribution, therefore, to incorporate the messy service nodes of space into the cloud service logic...
Organization should focus on how to implement effection mechanics of knowledge reuse so as to improve its core competitiveness under the era of big data. The maturity of semantic web technology has brought new opportunities for knowledge reuse. First of all, through the semantic description to achieve the relationship between the characteristics of the parts, the capture of attributes. Secondly, construct...
To solve bearing electric corrosion of motor drive system, the mechanism of bearing voltage and bearing current is studied. To validate the mechanism, the motor driven by high frequency PWM pulse system is established. The model of drive system based on MATLAB/SIMULINK is introduced. The proposed model is verified experimentally with the results presented.
Recommendation is an important problem in the traditional field of data mining. As a consequence, various kinds of algorithms have been proposed in the last few years to improve the recommendation performance. However, many of them overlook users' rating behaviors. In this paper, an improved recommendation algorithm with considering users' habits and rating behaviors will be proposed. Firstly, calculate...
The identification of drug-target interactions in web lab is costly and time-consuming. Computational approaches become important to help identifying potential candidates for laboratory experiments. However, they usually involve solving optimization problems or assuming statistical distribution based on prior knowledge, and may require estimating tunable parameters. This paper is motivated by the...
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