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We experimentally present a C-band push-pull dual-ring silicon photonic modulator operating at 60 Gb/s in B2B configuration. Without CD compensation, 23 Gb/s transmission over 20 km of SSMF with measured BER below 3.8×10-3 is demonstrated.
We demonstrate a polarization independent adiabatic 3-dB coupler for the silicon-on-insulator platform, with a measured bandwidth of 100 nm and power splitting ratios of 3 ± 0.7dB for both the transverse electric and transverse magnetic modes.
The chiller system in a building accounts for the main part of the building's total energy consumption, so it is critical to optimize the operation of chiller system for the purpose of saving energy. A chiller system generally consists of evaporation side and condensing side. The condensing side includes chillers, cooling water pumps and cooling towers, which form a subsystem of cooling water. It...
As the penetration level of wind power increases, displacing conventional power generation with wind power will reduce the inertia of power system and decrease the frequency stability. Energy storage devices with only 5% energy storage of wind farm's rated capacity can produce the same virtual inertia as a same capacity synchronous generator. To reduce the additional costs of individual energy storage...
With he rapid development of the mobile Internet industry, information security based on trusted computing is also becoming increasingly serious. Considering that most of the existing research is based on the static security measure, and based on the server and PC side, a security operation environment measurement framework based on mobile terminal is proposed in this paper to alleviate the information...
Due to the power consumption and hardware implementation cost limitation, hybrid analog and digital precoding is a promising candidate for millimeter wave (mmWave) large-scale multiple-input multiple-output (MIMO) systems. Most of the prior work on hybrid beamforming considers frequency-flat channels. However, in practice, thanks to the large amount of available spectral resource, mmWave communication...
We demonstrate a compact, single-etched sub-wavelength grating coupler for the O-band application, which has a measured insertion loss of −4 dB, a 3-dB bandwidth of 39 nm, back reflections below −20 dB, and a design footprint of 20um × 40um.
This paper describes the method of solving the optimization problem of running number of chilled water pumps using decentralized distributed calculation. The feasibility and effectiveness of solving the optimization problem by decentralized distributed algorithm are verified by case studies.
In this paper, Simulink model is built to simulate the chilled water system of a real building. The optimal chilled water flow rate and chilled water supply temperature are found out by traversing the constrained parameter values under different working conditions. The simple optimal control rules are developed based on the optimal solutions. Optimal control rules can reduce the total energy consumption...
A 3D visible articulation system which utilizes audio-visual data to accurately simulate the 3D articulatory motion is developed in this paper. The 3D articulatory shapes are reconstructed from Magnetic Resonance Images (MRI). In order to synthesize accurate audio-visual results, articulatory parametric models are further developed and the Electromagnetic Articulography (EMA) data with synchronized...
Cardiac mock models are helpful to develop new imaging methodologies. Although several mock model setups have been proposed, a good model for the development of intra-cardiac flow imaging is missing. The challenge lies in the fact that mimicking realistic flow patterns requires a realistic left ventricular shape as well as valve systems and a fluid with appropriate rheological properties. Moreover,...
Automated assembly, especially peg-in-hole insertion, is a common task in manufacturing. In particular, the high-precision assembly is achieved by high-precision manipulator and sensing system. However, uncertainty and various parts for assembly are still challenges for robotic assembly, especially for low-precision robot and sensors. It is noteworthy that human can implement assembly tasks although...
We demonstrate a broadband sub-wavelength grating coupler for the O-band application, which has a simulated coupling efficiency of −3.3 dB with 3-dB bandwidth of 78 nm and a measured coupling efficiency of −4.5 dB with a 3-dB bandwidth of 65 nm for fundamental TE mode.
As a quick access recorder (QAR) loaded on the plane, QAR data records hundreds of parameter data produced in the process of flying. But these data are not currently being used effectively. It is becoming increasingly necessary to use QAR data for fault prediction. First, the technical route of the civil aircraft fault prediction is illustrated. Second, four fault prediction methods of civil aircraft...
In order to ensure the three degree of freedom permanent magnet spherical motor complete the specified motion process with high efficiency and minimum-jerk, a kind of trajectory planning method is proposed with five times non uniform rational B spline curve interpolation sequence. With the rotor output shaft have constrained accelertion, the starting speed, acceleration, jerk and ending speed, acceleration,...
Previous studies have shown that changes in human emotions or public opinions can have an impact on volatility of stock market. In this paper, we make use of the unstructured comments data from the stock forum on the Shanghai Composite Index to generate the structural emotion time series of the stock market based on a series of methods including word segmentation, feature extraction, machine learning...
Conventional phase-contrast (PC) MRI relies on electrocardiogram (ECG)-synchronized cine acquisition and respiration control. It often results in relatively low data acquisition efficiency, and is unable to assess blood flow variabilities. Real-time imaging is a promising technique to overcome these limitations; however, it results in a challenging image reconstruction problem with highly-undersampled...
This paper considers a central estimator design problem for stationary targets or moving targets based on weights assignment by a group of agents. A general form of estimator is first proposed. We then introduce the definitions of the converging central estimator. Then the central estimator is constructed by a new information assignment function and the information feedback function. Furthermore,...
This paper proposes an integrated poor-quality model to find the potential relationship between elected STB (set-top boxes) indicators and network conditions. The target is to make the IPTV network fault diagnosis more accurately and efficiently, especially for the sudden pause or blurred screen. The integrated poor-quality model consists of indicator, record and user model. Firstly, the poor-quality...
This paper reported a high-resolution non-contact thickness test method of ultra-thin silicon diaphragm fabricated by KOH cavity erosion. For the first time, the test sensitivity increases when film thickness decreases, so the novel method is especially suitable for ultra-thin film measurement. Traditional test methods, like optical microscope, step profiler and optical profiler, are incapable of...
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