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Giving priority to developing public transport is of great significance for managing urban traffic congestion, which setting bus lanes in the intersection gives space priority to public transport. In the intersection's bus lanes planning process, the intersection effective evaluation is indispensable. First of all, establish intersection effective evaluation system for comparing traffic efficiency...
This paper gives a method of establishing small-signal model for full-bridge inverter arc welding power supply via state-space averaging treatment and linearization method. On the basis of the model, the frequency response reflecting dynamical characteristics of arc welding power supply is analyzed by means of MATLAB. The simulation result has agreement with experiment result as regards dynamical...
In this submission, we present the characterization of a silicon electro-optical modulator using Mach-Zehnder interferometer structure. We characterize the transmission spectra upon various DC and RF voltage supplies with different input optical power. We show the slope efficiency dependence on the optical input power. We also measured the spur-free dynamic range of the modulator using two-tone method,...
Microwave photonic filter requires high-speed Radio frequency (RF)-optical and optical-RF signal conversion. Light sources and photo-detectors (PDs) are indispensible for such conversions. Monolithic integration of functions of photon emission and detection is demonstrated using epitaxial Ge on Si. The fabricated waveguided PD shows a high bandwidth of 10 GHz with the responsivity of 0.8 A/W and dark...
Take an experimental middle school of rural-distance education projects in the west area of China as an example, The paper constructs and implements a rural-distance education model based on Moodle. Although the study found that the model does not significantly improve the achievement of students, it can reduce the gap anong the students and improve students' interest in learning, and it can also...
Depletion mode silicon modulators with an extinction ratio of >10 dB at 12.5 Gbps and a phase-shifter optical loss of 4 dB is reported. A novel technique further reduces the optical loss, bridging the performance gap between silicon and LiNbO3 modulators.
The paper researChes the strong heat transfer numerical simulation to the transitional period of medium and low temperature of high temperature heat pipe heat exchanger. It sets the calculation model of the headquarters according to the characteristics of heat transfer of heat pipe heat exchanger, and forecasts the fluid temperature field distribution outside of pipe reasonably and accurately by FULENT...
This paper built a model of a structure and performed impedance analysis by using FEM software, two scenarios have been discussed. 1) stainless steel content in the container, 2) 45# steel content in the container. Subsequent experimental results were consistent with the calculational results. The conclusion showed that experimental and theoretical limpedance results were influnced by the varity of...
Electronic properties are calculated and simulited by using density functional theory based on the nonequilibrium Green's function when a zigzag single-wall carbon nanotube (SCNTs) is twisted. We found that the twist of the single-wall carbon nanotube decreases their transmission function in certain energy ranges but some peaks are higher than unit despite twisting strongly affects the electronic...
Silicon Mach-Zehnder modulators with reduced series resistance in lateral PN junction rib-waveguide phase shifters are characterized in eye-diagram measurements. The modulators reveal extinction ratio beyond 10dB at 10.0–12.5Gbps, approaching lithium-niobate modulators in high-speed performance.
In this paper, gas-solid flow-field, pressure changes, velocity changes and vortex properties inside gas-solid cyclone separator are studied under various conditions with software of Fluent. The research results show that velocity along Y axis direction (tangential velocity) and along Z axis (axial velocity) are dominant factors in cyclone, static pressure, velocities in all directions, and separation...
A directed logic architecture consisting of two silicon microring resonators which can perform XOR operation is proposed. Two electrical modulating signals applied to the microring resonators represent the operands of the logical operation. Bitwise XOR operation at 20 kbit/s is demonstrated.
In this paper, a low power consumption thermo-optical switch is presented on SOI platform. The switch power consumptions for TE mode and TM mode are 0.49 mW and 1.1 mW, respectively. And the extinction ratios are 23.0 dB and 14.3 dB for TE/TM mode, respectively. The switch time is about 266 μs for both modes, including 144 μs rise time and 122 μs fall time. Compared to the similar switch with conventional...
In this work, we have developed a Ge electro-efficient (EA) modulator whereby light is coupled evanescently from a crystalline silicon waveguide up into a Ge rib. A lateral electric field is employed in the Ge rib to enhance absorption via the Frank-Kedlysh effect which enables light modulation. The EA effect is most pronouced at wavelengths beyond 1580 nm due to a roll-off in absorption coefficient...
We demonstrated a high performance DWDM receiver monolithically integrated with AWG and photodetectors array on SOI platform. It is capable of operating at 320 Gbps data rate and its sensitivity is between -16 dBm and -19 dBm.
In order to forecast the corporate finance performance, we must choose the appropriate forecast method. The forecast model widely used at present lacks generalization ability and the accuracy is not approving. In this paper, we propose an improved version of support vector machines (named AdaBoost support vector machine) to forecast financial performance of Chinese listed companies. In the choice...
A global linear coupling and combined with local feedback method is proposed to realize multi-objective control method for any chaotic connected complex network. Beam transport network and Lorenz chaotic connected network are taken as two typical examples to show the method effectiveness and potential of applications.
In this paper we apply the nonlinear time series prediction method to the traffic measurements data. Based on the phase space reconstruction, the support vector machine prediction method is used to predict the traffic measurements data, and the neighbor point selection method is used to choose the number of nearest neighbor points for the support vector machine regression model. The experiment results...
We demonstrate selectively grown Ge/Si avalanche photodetectors with a bandwidth of 10 GHz at gain = 8 at 1310 nm. The high bandwidth-gain-product of 80 GHz and Si monolithic integration capability offer great potentials for future applications.
We study the problem of landmark selection for landmark-based routing in a network of fixed wireless communication nodes. We present a distributed landmark selection algorithm that does not rely on global clock synchronization, and a companion local greedy landmark-based routing scheme. We assume no node location information, and that each node can communicate with some of its geographic neighbors...
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