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A high-precision and temperature insensitive longrange distance measurement (DM) based on frequency detection is proposed and experimentally demonstrated. Two optoelectronic oscillators (OEOs) are grouped into a cross-referencing structure by Dense Wavelength Division Multiplexing (DWDM), which can greatly increase the measurement accuracy by reducing the influence of the environment such as temperature...
Optical techniques have the potential to overcome limitations of electronic digital-to-analog conversion (DAC). A serial optical DAC (ODAC) utilizing the dispersion property of fiber-optic is proposed and demonstrated. The structure of the proposed DAC is designed based on the concerning of dispersive summing and electro-optic bit selection, which is easier to be realized compared with the conventional...
Grey Wolf Optimizer (GWO) is a new meta-heuristic optimization. It is inspired by the unique predator strategy and organization system of grey wolves. Since the GWO algorithm is easy to fall into local optimum especially when it is used in the high-dimensional data, an improved GWO algorithm combined with Cuckoo Search (CS) is proposed in this paper. By introducing the global-search ability of CS...
Taking security management of Software-Defined Networking (SDN) into consideration, the identification of attacks due to the SDN-specific vulnerabilities is of great significance. Thus in this case, formalization of security attacks becomes essential in promoting the identification process of attacks. This paper then proposes an integrated approach of attack trees and extension innovation methods...
The thermocouple (TC) whose error can be arbitrarily adjusted is proposed in this paper. Its error of method, that occurs in this case, is studied. It is shown that the error of method depends on the size and material of the additional legs. The way of radical reduction of the error of method is proposed. The proposed TC practically solves the problem of complete experimental research for the techniques...
The tremendous growth rates of Internet and volume of content stored on its servers requires the creation of tools for automatic content analysis and processing. Intelligent systems for content processing aim to simplify and automate such tasks as content analysis and classification, finding keywords and building digests, distributing content according to specified criteria. This paper presents the...
The contribution focuses on the current status of the ESA study entitled “InSARAP Sentinel-1 Constellation Study”, which investigates the interferometric performance of the S1A/S1B units. General aspects like the interferometric compatibility in terms of common range and Doppler bandwidth and the burst synchronization are addressed. Besides the first interferometric results with both units, time series...
AfriSAR is an ESA-funded airborne P- and L-band SAR campaign over the African tropical forests of Gabon carried out by ONERA (July 2015) and DLR (February 2016). The different acquisitions were designed in order to collect multibaseline fully polarimetric data allowing the inversion of key forest vertical structure-based parameters, like e.g. forest height and high resolution reflectivity profiles...
In this work, we discuss the retrieval of information about the vertical structure of the ionospheric phase by means of Multi-Squint Interferometry (MSInSAR). A model of the MS phase is proposed that accounts for multiple ionospheric layers and residual topographical terms. This model is then generalized to the case of a continuous distribution, which can be retrieved from the MS phase via a 2D Fourier...
An adaptive radial basis function neural network(RBFNN) sliding-mode controller with decoupled method was proposed for a class of underactuated system. Different sub-systems were devided according to the performance of the system, and the corresponding sub-sliding plane was designed for the sub-system; The RBFNN controller was designed for one of the sub-system, and its adaptive algorithm was derived...
The use of microcontroller (MCU) has become pervasive in every aspect of our daily life, and MCU is also an important course for most Chinese university students of electrical engineering and automation major. Project-based learning (PBL) appears as one of the most interesting instructional strategies, the PBL strategy tries to engage students in authentic real-world tasks to enhance learning, PBL...
In this paper, we study the effect of mechanical compliance on the impact force of human-robot interactions, more specifically the maximum impact force during a collision. Here we consider two methods of introducing compliance to industrial manipulators: joint compliance and link compliance. To compare their effect on the maximum impact force, we study two designs of a 2D robot link: a rigid link...
As for the traditional Internet, network management usually did not evolve together with the newly introduced networking technology, and becomes a post-technology these days. In order to avoid patching Software-Defined Networking (SDN) later, an additional management plane may possibly be of great significance. Currently, both SDN management and non-SDN network management still coexist, and Simple...
We report on the packaging of the 50 × 50 MEMS-actuated silicon photonics switching device through flip-chip assembly and a lidless 64-channel fibre array polished at 13° angle. The device, measuring 10 mm × 10 mm, contains more than 2500 bond pads with a dimension of 65 μm × 65 μm, with the actuating MEMS structures locating 15 μm away at 4 sides of each bond pads. An average switching voltage of...
A novel split ring slot antenna with multiband characteristics is proposed in this paper. The antenna consists of a split ring slot and a ring slot on top surface as the radiator. A novel split ring slot antenna is proposed to realize polarized radiation based on the SIW cavity. Three patch-like radiation patterns and one monopolar radiation pattern at four different frequencies are excited by the...
In this paper, a triple-band substrate integrated waveguide(SIW) antenna is presented. The proposed antenna consists of a T-shaped radiator, where it is etched on the top side of the common dielectric substrate and fed by a substrate integrated waveguide(SIW) feed-line. Embedded in the E-plane of the antenna are two arrays of zero-index matamaterials (ZIM) unit-cells whose purpose is to effectively...
A novel wideband high-gain Magneto-Electric dipole antenna is presented. The proposed Magneto-Electric antenna is composed of a fishtail-shaped electric dipole, a half-circular loop antenna that works as a magnetic dipole, a microstrip-to-coplanar stripline transition balun, a box-shaped reflector and the loading of T-shaped array of metamaterial elements on the dielectric substrate. A high gain can...
We report on the first electrical and optical packaging of digital silicon photonic MEMS switches with 12×12 ports, 13∼18dB fiber-to-fiber loss, 10−11 BER for 10-Gb/s datastream, 0.4μs switch reconfiguration time, and <1.6V (5%) switching voltage variations.
A novel compact slotted dielectric substrate loaded broadband Vivaldi antenna is proposed. This antenna consists of a typical antipodal SIW Vivaldi antenna and two pieces of FR4 substrate with uneven thickness and periodic slots, two pieces of FR4 substrate is symmetrically loaded on Vivaldi antenna above and under respectively. The effects of different thickness distribution and slots on substrate...
In this work, we present thermal imaging and analysis of a silicon photonic optical network unit (ONU) for next generation passive optical networks (NG-PONs). A high-speed thermal camera is used to capture both the dynamic and steady-state temperatures of the photonic integrated circuit (PIC) and electric integrated circuit (EIC) at the core of the ONU. The dynamic temperature measurements of the...
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