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We report efficient on-chip Turing pattern formation, uniquely enabled by mode-hybridization induced phase matching. Destabilization of Turing pattern is circumvented, thereby achieving unprecedented pump depletion and record high external pump-to-comb conversion efficiency of 45%.
We report chip-scale Turing frequency comb with narrow linewidth of 9 kHz and long term stability of 160 kHz on THz carriers. The Turing comb is transferred onto a plasmonic photomixer, achieving 600 μW terahertz radiation with high 1.1% optical-to-terahertz power conversion at room temperature.
The parameters of the resistance model are obtained through various experiments under different lamp power in this study. Polynomial fitting curves are obtained for these parameters to get the values under some certain lamp power. Then simulations in PSIM are conducted by using the calculated values to verify the reliability and accuracy of the method adopted. Good agreement is obtained between the...
UV-lamp driver especially for radiation at 253.7nm plays an important role in sewage treatment. In this paper, characteristics of the excitation of mercury atoms in the lamp are investigated deeply based on both theoretical knowledge on collision and experimental results on relationship between the irradiance at 253.7nm with the lamp power. An optimization design scheme is proposed to prolong the...
Bioelectrical impedance technology is considered to be a noninvasive method of measuring heart function. Feature points extraction of impedance cardiography (ICG) signal is vital to cardiovascular disease diagnosis, and feature points extraction has curative value after operation. In this paper, the new algorithm combined with the wavelet technology to extract feature points accurately. Feature points...
With the development of information technology, the electric power system has gradually entered a new stage. And the security problem of electric power system has become an important research filed. In this paper, we applied wavelet technology and digital watermarking algorithm to improve the security level of the electric power system. This two technologies can complete sensitive information hidden...
This paper demonstrates a push-pull traveling-wave Mach-Zehnder modulator on InP which operates up to 50Gb/s in C band optical transmission system. This MZM could potentially be integrated to form the IQ modulators, Dual IQ modulators and PM-IQ modulators to achieve higher operating speed.
Wireless sensor networks query processing is useful for sensing systems, such as environmental monitoring. Innetworks query processing is attracted by researchers to develop user-friendly sensing systems. Due to the sensors considered as a limited resource and battery powered devices, more robust features are recommended to limit the communication access to the sensor nodes for maximizing the sensor...
Wireless power transfer (WPT) which can realize electric power transmission over certain distances without physical contact has been an active research topic in recent years. Reliable data transmission between primary side and secondary side plays an essential role in a well-designed WPT system. In this paper, electric power and data signal through the same inductive link and the S/P compensation...
This paper presents a magnetic coupling resonant wireless power transfer (MCR-WPT) system. Two separated coils form a loosely coupled transformer. The primary side adopts a Class-E amplifier, which produces high frequency sinusoidal current to excite the primary winding, inducting a high frequency AC voltage in secondary winding. The secondary side adopts a Class-E rectifier to rectify the high frequency...
The software defined optical network (SDON) service plays an important role in the production and operation of the network system. It's important to solve the problem of how to reduce the risk and distribute the service path more rationally. However, most of the existing algorithms do not take into account service importance. In this paper, a risk balancing routing assignment mechanism based service...
The effect of initial frequency chirp is numerically investigated to obtain high-efficient supercontinuum radiation in photonic crystal fibers with two closely spaced zerodispersion wavelengths. Our results show that the positive chirp can significantly improve the probability of energy transferred from the soliton to dispersive wave. And with the increase of the chirp, the energy increases obviously...
We present a regrowth and grating free InP-based single-facet teardrop laser consisting of a 1×2 multi-mode-interferometer and a waveguide loop reflector. The fabricated laser demonstrated CW lasing above 75mA and single frequency operation with a side mode suppression ratio of 30dB. This laser is also a potential candidate for low linewidth source.
The purpose of this paper is to find the relationship between coal metamorphic and adsorption of Carbon Monoxide(CO) and reveal the source of CO in mines. Through preparation and industrial analysis of coal samples, mercury injection experiment and analysis of different metamorphic grade coal samples, to analysis the impaction on coal metamorphic grade of CO adsorption. Research shows with the increase...
DSR is one of the most important routing protocols in MANET. Because of the mobility of MANET, DSR routing is only one available route rather than an optimal situation, in this paper, Continuous Hopfield Neural Network is used to optimize the route to find an optimal or nearly-optimal route, which can improve the usability and survivability of MANET. The simulation results show that CHNN-DSR is more...
How to operate a BFG/coal co-firing boiler in high efficiency is challenging for a gas/solid multi-fuel combustion system. Taking operation data from a real boiler, this study proposes an operation optimization strategy of BFG/coal co-firing boiler based on deep learning. Firstly, the thermal efficiency model is constructed based on deep learning with all the actual sampling data, which outperform...
Fault isolation is an essential step in multivariate statistical process monitoring, which discovers the cause of the detected fault. The common adopted techniques for fault isolation, such as contribution plots, reconstruction analysis, branch and bound, etc., often suffer from the problems of the smearing effect, insufficient historical fault data, and heavy computational burden. In this paper,...
Both the plant parameter4 and delay time of the system may vary in the time-varying system, which makes system identification relatively complex. In this paper, a new system identification algorithm based on subspace method and cross-correlation function is proposed to identify system parameter and time-delay simultaneously. The time delay is identified with the calculation of the cross-correlation...
In industrial process, some important variables such as quality index, efficiency index and concentration of product components are difficult or even impossible to be measured directly due to the limitation of technology. This phenomenon leads to few labeled data and plenty of unlabeled data. Traditional identification method for controlled auto regressive (CAR) model usually cannot deal with unlabeled...
This study proposes a concept for multithread active vision sensing that can measure dynamically changing displacement and vibration at multiple points on civil engineering structures. In multithread active vision sensing, a high-speed camera can function virtually as multiple tracking cameras by accelerating its measurement, computation, and actuation with ultrafast viewpoint switching at millisecond...
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