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The MWR instrument builds, together with the SRAL altimeter, the Sentinel-3 (S3) topography mission in the frame of the EC Copernicus program. The MWR provides information for tropospheric path correction of SRAL measurements, and its data can also be used for determining surface emissivity and soil moisture over land, for surface energy budget investigations and ice characterization. The MWR is a...
The MWR instrument builds, together with the SRAL altimeter, the Sentinel-3 (S3) topography mission in the frame of the EC Copernicus program. The MWR provides information for tropospheric path correction of SRAL measurements, and its data can also be used for determining surface emissivity and soil moisture over land, for surface energy budget investigations and ice characterization. The MWR is a...
In the passive localization, the estimate error of sensor position and velocity is inevitable. By the use of the calibration, the sensor position and velocity will be improved, especially, to the Cramer-Rao lower bound (CRLB) under the ideal circumstance. The CRLB for the estimate of sensor position and velocity is derived at beginning. Then the CRLB for the estimate of source is followed. Finally,...
Self-calibration based on rotating cameras is a classical technique for recovering internal parameters which ensures that the camera motion is pure rotation and does not permit translation. In practice, however, it is hard to exactly keep the camera not to translate. Previous studies on this issue are mainly qualitative and less operable for practice applications. In this paper, we experimentally...
Recently, autonomous robots have been widely used in the production field. There are several advantages to introducing industrial robots in factories. However, these robots cannot be used in unknown environments because most of them are controlled by sequence controls. Two cameras are used as vision sensors that can recognize the outside environment to solve this problem. In this study, we aim at...
Aiming at the requirement of an accurate docking between high-accuracy star sensor and star simulator in calibration test, so that to achieve the target of accurately picking up positions of simulation stars, a five-dimension adjusting frame with high resolution and good stability is designed. The functional demands of the adjusting frame are analyzed in depth. In order to reduce docking error and...
We present a new technique to infer dimensions that can be used in biometric face recognition. The methodology is centered on inferring unique dimensions from human ears which provides unique physical biometric features. The process of determining the distance is done by harvesting the real actual dimensions from 2D faces images. This is achieved by using specific point to point distances on the two...
WIFI-based received signal strength indicator (RSSI) fingerprinting is widely used for indoor localization due to desirable features such as universal availability, privacy protection, and low deployment cost. The key of RSSI fingerprinting is to construct a trustworthy RSSI map, which contains the measurements of received access point (AP) signal strengths at different calibration points. Location...
Although numerous steganalyzers for least significant bit (LSB) matching have been presented, the detection for uncompressed images and low embedding rates remains challenge for steganalysts. In this paper, we propose a novel method for detection of LSB matching steganography, which is based on the features extracted from a conditional probability matrix described by Markov Mesh Models (MMMs). The...
In order to achieve accurate automatic recovery of fixed-wing UAV at the known landing site, an airborne aided landing navigation system based on machine vision is designed and realized, and the key algorithms of the system are investigated. First, according to the need of automatic landing, such as high precision, real-time and strong anti-interference ability, a scheme of vision-aided landing navigation...
A 0.5μm-CMOS-process optimum torque (OT) control integrated circuit (IC) with an active area of 0.35mm2 is implemented for harvesting the most available energy from and prolonging the lifetime of a wind turbine generator (WTG) in a wind energy conversion system (WECS). This pioneering custom-designed analog IC with low power consumption can be applied to wide power range WECS applications. It achieves...
Accurate measurement of FET gate resistance is needed to support technology development and to understand its impact on RF performance. This is especially true for high-K Metal Gate Fin FET technologies. Decreasing gate capacitance with each successive technology node has made gate resistance measurement increasingly difficult. This work presents a "Virtual De-Embedding" approach to the...
It has been shown that ATE systems which are targeted at families of products can have a significant positive impact on the cost of test and capacity availability. In addition it has been shown that the quality (accuracy and repeatability) of the test system reduces the overall cost of test and rework. The historical challenge has been that test systems are traditionally targeted at an individual...
This work presents an omnidirectional stereo system with a direct application to autonomous logistics. The omnidirectional system uses fisheye lenses to inspect the surroundings of the automated forklift. The lenses are mounted on the top of the vehicle to allow a 360° scene reconstruction with a single stereo pair. The system provides the list of obstacles detected around the vehicle. The reconstruction...
LRL technique for calibrating the automatic network analyzer is presented. LRL technique is a variation of TRL, it is especially useful for microwave, non-coaxial environments. This technique would enhance the accuracy extent of calibration. Detailed information about the choice of LRL calibration kits and LRL calibration steps are given. In addition, an measurement example using LRL calibration approves...
In this work, we present a novel method to accurately calibrate active depth sensors such as the Microsoft Kinect. Our approach is based on the Gaussian Process Regression (GPR). It is applied after the standard calibration and it is particularly useful for the aging depth cameras. The latter, were proven to suffer from inaccuracies that cannot be fixed with the standard pinhole camera calibration...
Since JPEG images have been widely used in our daily life, the steganalysis for JPEG images becomes very important and significant. The Article addresses steganalysis in static images based on DCT transformed region, able to recognize the most popular steganography algorithms occurring on the Internet. We propose a new steganalysis method, where statistical properties of the image are explored, regardless...
This paper presents a digitally calibrated 12bit 12.5-MS/s successive-approximation-register (SAR) analog-to-digital converter (ADC) intended for low-power wireless communication and medical instrumentation. The performance of the proposed prototype is enhanced by two techniques. A power saving strategy is proposed. Also, several foreground calibration methods for SAR ADCs are proposed to reduce the...
A method of resistance calibration without external precision elements usage presented in paper. In the proposed method, used structures which operation based on technologically accurate elements and signals to have high accuracy resistance after calibration. Architecture produces a calibration code corresponding to 50Ohms PVT compensated termination impedance, which is needed to avoid reflections...
Pedestrian dead reckoning is a method of localization that uses inertial sensors to estimate the travelled distance from the previous position. This method can estimate the position when GPS or WiFi is not available such as indoor. However, pedestrian dead reckoning is subject to cumulative errors. In this paper, we exploit the fact that most of lights are located regularly in indoor environments...
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