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We demonstrate experimentally a passively relative carrier-envelope phase (CEP)-locking, broadly tunable and robust laser source which is based on narrowband cw injection seeding of a two stage femtosecond optical parametric amplifier (OPA).
A tunable whispering gallery mode (WGM) resonator based on nematic-liquid-crystal-infiltrated silica capillary is presented in this paper. WGM wavelength shift is achieved by exploiting the birefringence effect of liquid crystal triggered by applied electric field.
A hardware test-bed (HTB) has been developed to realize power system emulation by mimicking the system components with universal three-phase voltage source converters (VSCs). The VSC-based transmission line emulator has also been successfully developed to flexibly represent interconnected ac lines under normal operating conditions. As the most serious short-circuit fault condition, the three-phase...
With the rapidly increasing applications of deep learning, LSTM-RNNs are widely used. Meanwhile, the complex data dependence and intensive computation limit the performance of the accelerators. In this paper, we first proposed a hybrid network expansion model to exploit the finegrained data parallelism. Based on the model, we implemented a Reconfigurable Processing Unit(RPU) using Processing In Memory(PIM)...
Battery energy storage system (BESS) has been used to smooth the wind power fluctuations. However, because of the cost of BESS is relatively high, the effectiveness of fluctuation smoothing has been limited. Meanwhile, capacity optimization of energy storage can reconcile the relationship between energy storage cost and the smoothing effectiveness. Thus, a novel sizing algorithm of BESS is proposed...
The scale of the modern city has been expanding, which leads to a lot of serious environmental pollution problems. Among them, the air pollution problem is the most prominent. In order to control the air pollution in urban cities, the government has deployed a lot of air pollutant monitoring equipment which produce massive multi-dimensional time series data. Through the motif discovery and analysis...
This paper addresses a new type of distributed assembly permutation flow-shop scheduling problem, where the single distributed assembly line in the conventional version is replaced by multiple assembly factories. Then within this scheduling framework, we consider two transportation problems. One is the transportation of jobs between origin and the assigned processing factory by obeying the capacity...
Distributed Assembly Permutation Flowshop Scheduling Problem (DAPFSP) represents a widely-applied manufacturing pattern, which is formed by two relatively independent stages, i.e., processing stage and assembly stage. In this paper, we introduce the Just-in-Time (JIT) constraint between the two stages of the conventional DAPFSP to form the Just-in-Time DAPFSP (JIT-DAPFSP), with respect to minimizing...
Recently, the penetration of photovoltaic (PV) power in power system has being promoted rapidly. However, the PV power shows drastic fluctuation which presents great challenge to the power grid. Thus, how to mitigate the fluctuation of PV station needs to be solved. Battery energy storage system (BESS) is flexible to charge/discharge and track the fluctuation of PV power, and also BESS integrated...
Given the widely adoption of screen and camera in many electronic devices, the visible light communication (VLC) over screen-to-camera channel emerges as a novel short range communication technique in recent years. Active research explores various ways to convey messages over screen-camera channel, such as barcode and unobtrusive optical pattern. However, with the prevalence of LED screens of wide...
This paper provides quite a new approach for analog computing. This work proposes an analog characterization module to imitate (emulate) various analog components as essential technologies for analog reconfigurable system. This module converts an analog input signal into digital by an ADC, makes use of digital signal processing technologies to characterize the signal as expected, and outputs the analog...
In this paper, the source converter of a cascaded system is modeled by small signal method, and the closed-loop transfer functions of the converter are obtained by reducing the order. Then the output impedance of the source converter is calculated. The analysis of the output impedance indicates that the smaller bus capacitor is, the worse stability of the cascaded system is, and the smaller power...
The overflow problem often happens at closely spaced intersections. In order to optimize the signal control for closely spaced intersections, geometric features and traffic flow characteristics of the intersections were analyzed and an effective synchronous control strategy was put forward for vehicles that turn left from the upstream intersection and for vehicles stopped between two intersections...
Splicing forgery is a commonly used operation in digital image synthesize. Exposing multi-object splicing forgery by detecting noise discrepancy is discussed in this paper. The image is firstly segmented into small segments and noise level function, which reveals relationship between image noise and pixels' intensity is estimated. Suspicious regions are detected by checking constrains of noise level...
An aggressive controlling for layout pattern density is becoming essential for the manufacturability of advanced processes. Focusing on analog layout under severe density constraints, this paper provides a novel idea that layout generation and verification are co-working on a density-aware format. Our idea follows a transistor-array(TA)-style of analog layout where unit-transistors of the same channel-size...
Safety and efficiency have become two of the most important problems for metro system operations because of the ever growing patronage size. Collecting passenger flow data about flow, route choice and various other behaviors is a fundamental task towards understanding the crowd and controlling it. Static or location based passenger flow information, such as the flow through a particular escalator,...
Electric bicycle is very flexible, convenient and environmental, which is the ideal mode of transport for short distance travel. Electric bicycle has become an indispensable important component of the transportation system. The fact is that traffic organization and channelizing design of signal control intersections is not intensive, which can not adapt to the current traffic demand of non-motor vehicle,...
This paper is mainly focus on bidirectional on-board charger with high performance and low cost. With SiC MOSFET, it is possible to make the on-board charger high efficiency, high power density and light weight. However, the price of the SiC MOSFET is higher than Si based MOSFET. Therefore, a high performance on-board charger with a small number of SiC MOSFET is the key factor to limit the cost of...
There are some shortcomings in the delay tolerant network (DTN) routing algorithm, such as low message delivery rate, low network efficiency and high cost in the satellite network. In order to solve the problem above, this paper proposes a limited copy algorithm MPWLC based on service probability. In MPWLC, not only is the number of copies limited, but the storage resources of the satellite are also...
Weight distribution of code is very important for error correction in the use of Turbo coding program in optical fiber communication. Input sequence need to pass convolutional encoder, Therefore, it is necessary that the weight of the output should be kept as large as possible. Although the interleaver can help to improve the output code weight, the higher the complexity of interleaving, the iterative...
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