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Two channels of a ring modulator transceiver device are concurrently modulated and characterized for optical crosstalk by monitoring link bit error ratio. Power penalty of 1–3dB at +50GHz channel spacing is observed for 10Gb/s data rate.
National Chiao Tung University is executing a large smart campus project sponsored by Ministry of Science and Technology. One of the goals is to utilize Internet of Things (IoT) technology to control electronic appliance and education devices. This talk describes a platform called IoTtalk for IOT device interaction. IoTtalk allows connection and meaningful interaction between physical IoT devices...
AlGaN / GaN high electron mobility transistors (HEMTs) were exposed to 800MeV Bi ions with fluence up to 5×107 ions/cm2 at the Heavy Ion Research Facility in Lanzhou (HIRFL) Cyclotrons in Institute of Modern Physics, Chinese Academy of Sciences. Test results show that the drain current Id and the maximum transconductance gmax decreased by 6.8 % and 3.2% respectively, while the gate leakage current...
In this paper, a TRIAC dimmable controller for quasi-resonant flyback LED driver is realized. Nowadays, many countries take effort to save energy. Because lighting system takes part of approximately 20% of world energy consumption, by replacing the traditional incandescent bulbs with light-emitting-diode (LEDs), electrical energy can be saved significantly. TRIAC dimmer is commonly used for traditional...
Computer Network Simulator(CNS) is researched and developed for experimental teaching and research to overcome the limitations of the real network equipment resources. By using it, students can do the experiment on computer just like in the real machine. The CNS can not only help teachers and students to teach and learn, but also can achieve the goal of combining teaching with learning. In this paper,...
We demonstrate an integrated photonic orbital angular momentum beam multiplexer consisting of four nested arc waveguide gratings. Well-defined OAM mode emissions over wide bandwidth of 1-nm enables simultaneous wavelength division multiplexing and OAM multiplexing.
Different from one-dimensional barcode, QR (quick response) code is a popular two-dimensional barcode due to the fact that it can carry greater data capacity and capable of resisting damage. The content of QR code can be easily revealed by barcode scanners. However, in the real world QR applications, the content could be private information, such as the e-ticket and e-coupon. The QR content should...
Synthetic aperture radar (SAR) images of the Earth's terrain surface contain the calculation of scattering coefficients and the simulation of backscattering echo, which are influenced by the terrain elevation and slope. In this study, we present a method of electromagnetic imaging for terrain surfaces based on airborne strip map synthetic aperture radar (SAR). First, the integral equation method was...
In the terahertz (THz) band, materials that could be seen as smooth and homogeneous at microwave frequencies may display surface and volumetric scattering behavior. In this paper, we apply the integral equation method (IEM) and the vector radiative transfer (VRT) theory to simulate surface and volumetric scattering by a rough material boundary, respectively, in order to study the scattering characteristics...
Based on satellite derived NO2 column data from OMI, we analysed the characteristics of spatio-temporal distribution of tropospheric NO2 column density and its impact factors over Beijing-Tianjin-Hebei Region for 2005–2014.
The Bragg hypothesis provides a simplified representation of the complex real ripples that contribute to sea clutter returns. We propose to describe the microscopic profile of large-scale long waves by a set of sinusoidal ripples, which are assumed to be with the Bragg wavelength that satisfies the resonant condition, and travel along the local scattering lines of sight pointing towards and away from...
We present a genetic algorithm-based inversion method for retrievals of sand-covered surface roughness from the polarimetric radar observation. This inversion method is based on the integral equation method (IEM), which was developed rigorously to estimate backscattering coefficients in theory from the surface roughness parameter. The genetic algorithm is applied for the inversion method to retrieve...
In this paper, we have proposed a sliding mode control law with gain-scheduled and improved boundary layer for leader-follower based formation control. The switching gains of sliding mode controller are required to change with the absolute value of sliding mode function. Specifically, a larger switching gain should be adopted in order to ensure rapid convergence, while a smaller one should be adopted...
In this paper, we proposed a design considering for web application firewall system. Anyway, the website managing, web technology and hacker technology are vastly different from each other, whilst hacker techs are keep on moving forward, while company and government MIS are difficult of updating their information to the latest state due to working, they are often not updated and followed to the latest...
The thickness effect of In-Ga-Zn oxide (IGZO) semiconductor layer is investigated for pH sensing in light-addressable potentiometric sensor (LAPS). pH sensing membrane is 45 nm-thick NbOx, which is directly on IGZO/ITO/glass substrate. The thickness of IGZO layer is determined by time-mode control in reactive rf sputtering. The highest photovoltage and operation frequency can be obtained in the IGZO...
This paper considers the stabilization problem of nonholonomic mobile robots with fractional-order sliding-mode control. Two fractional sliding surfaces are designed for the corresponding linear subsystems after using dynamic feedback linearization strategy, then the stabilizing fractional-order controller is proposed. Finally, the simulation results show the efficiency of the control methods.
The study for the establishment of a complete flight information system that Provide airport management authorities as passengers aboard the aircraft before departure and after the arrival of the various kinds of information, In order to after the arrival of the aircraft to help passengers get instant information, Flight management system has been capture by the Aeronautical Information Services system...
In this paper, the leader-follower consensus problem of linear multi-agent systems with unknown dynamics and external disturbances is studied by using the two-player zero-sum game and adaptive dynamic programming. First, we establish the global error dynamic system of the multi-agent system and decouple the global error dynamic system for each agent. Second, we use the two-player zero-sum game theory...
In this paper, an adaptive radial basis function (RBF) neural-networks (NNs) control algorithm is developed for a class of nonlinear affine systems based on data from controller with constrained control inputs. First, a novel nonquadratic performance index functional is introduced to overcome the nonlinear control constraints, and then the iterative adaptive optimal control algorithm is developed...
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