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Journal articles on the topic 'On-line path correction'

Author: Grafiati

Published: 28 June 2021

Last updated: 29 July 2025

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1

Li, Liangming, and Aihua Yang. "Correction Algorithm of Tennis Dynamic Image Serving Path Based on Symmetric Algorithm." Symmetry 14, no. 9 (2022): 1833. http://dx.doi.org/10.3390/sym14091833.

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The existing target tracking algorithm of the tennis dynamic image serving path cannot correct the serving path in time according to the physical characteristics of the target, resulting in poor correction accuracy and stability. To this end, this paper proposes correction algorithm of tennis dynamic image serving path based on symmetric algorithm. Dynamic images are obtained using the visual acquisition model. On this basis, the contour of the moving target is obtained by the symmetric algorithm, and the complete moving target is obtained by the background difference method. The physical prop

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2

Sun, Shujie, Dong Yu, Changhui Wang, and Chuanning Xie. "A smooth tool path generation and real-time interpolation algorithm based on B-spline curves." Advances in Mechanical Engineering 10, no. 1 (2018): 168781401775028. http://dx.doi.org/10.1177/1687814017750281.

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In the machining progress of free-form surface, tool path is presented as continuous small line segments. To achieve high machining speed and fine machining quality, the tool path needs to be smoothed. This study presents a smooth tool path generation algorithm based on B-spline curves for small line segments machining. The algorithm includes two modules: smooth tool path generation module and real-time look-ahead interpolation module. In the smooth tool path generation module, the tool path is divided into non-fitting regions and fitting regions by three conditions: the length of small line s

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Belchior, Jérémy, Dominique Guines, Lionel Leotoing, and Eric Ragneau. "Force Prediction for Correction of Robot Tool Path in Single Point Incremental Forming." Key Engineering Materials 554-557 (June 2013): 1282–89. http://dx.doi.org/10.4028/www.scientific.net/kem.554-557.1282.

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In this work, an off-line compensation procedure, based on an elastic modelling of the machine structure coupled with a Finite Element Analysis (FEA) of the process is applied to Robotized Single Point Incremental Forming (RSPIF). Assuming an ideal stiff robot, the FEA evaluates the Tool Center Point (TCP) forces during the forming stage. These forces are then defined as an input data of the elastic robot model to predict and correct the tool path deviations. In order to make efficient the tool path correction, the weight of three numerical and material parameters of the FEA on the predicted f

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Frehlich, Rod, Robert Sharman, Charles Clough, et al. "Effects of Atmospheric Turbulence on Ballistic Testing." Journal of Applied Meteorology and Climatology 47, no. 5 (2008): 1539–49. http://dx.doi.org/10.1175/2007jamc1775.1.

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Abstract The effects of atmospheric turbulence on munition target scatter are determined from numerical simulations of ballistic trajectories through many realizations of realistic simulated turbulent wind fields. A technique is evaluated for correcting for the effects of turbulence on ballistic testing procedures by using a line of sonic anemometer measurements taken along the trajectory path. The metric used to evaluate the correction is the difference between the target impact scatter produced with and without the use of the anemometers in the trajectory calculations. The improvement in the

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Liu, Huaming, Rumeng Shi, Xuehui Bi, Xiuyou Wang, and Weilan Wang. "Line Segmentation of Tibetan Ancient Books Based on A* Algorithm." Journal of Physics: Conference Series 2356, no. 1 (2022): 012046. http://dx.doi.org/10.1088/1742-6596/2356/1/012046.

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Line segmentation is an important step in image character recognition. However, due to the problems of interline adhesion, overlapping, and skewing of document images, the effect of text line segmentation is not ideal. Therefore, further research on image line segmentation of Tibetan ancient books is urgently needed. The standard A* algorithm is not ideal for line segmentation of Tibetan ancient books, so this paper proposes a block-based A* algorithm for line segmentation of Tibetan ancient books. The method firstly preprocesses the image such as binarization and tilt correction and then perf

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Qiu, Changwu, Qixin Cao, and Shouhong Miao. "An on-line task modification method for singularity avoidance of robot manipulators." Robotica 27, no. 4 (2009): 539–46. http://dx.doi.org/10.1017/s026357470800492x.

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SUMMARYIn this paper, we present an on-line task modification method (OTMM) to realize singularity avoidance for nonredundant and redundant manipulators at the velocity level. The method introduces a correction vector, constructed from the task velocity and the singular vector corresponding to the minimum singular value, into the task velocity. The performance is simply affected by the choice of the lower limit of the minimum singular value and a scalar adjusting function, which is monotone with respect to the minimum singular value. The method makes unnecessary avoiding the singularity point

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Li, Meng, Kanhua Su, Shuli Hu, Lifu Wan, and Weiqing Chen. "Displacement vectors control method for orienter ribs during path correction in coiled tubing drilling." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 10 (2018): 3531–46. http://dx.doi.org/10.1177/0954406218819036.

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The well path easily deviates from the original design trajectory during coiled tubing drilling, which needs to be corrected with an orienter. A three-segment correction trajectory with two arc segments and a line segment is constructed based on the differential geometry principle, and the direction at the target is consistent with the direction of the original borehole. Based on the parameters of the design correction trajectory, a mathematical relationship between trajectory parameters and the displacement vectors of orienter ribs is established by using the vector analysis method. According

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Sahni, Narinder Singh, Tomas Isaksson, and Tormod Næs. "Comparison of Methods for Transfer of Calibration Models in Near-Infared Spectroscopy: A Case Study Based on Correcting Path Length Differences Using Fiber-Optic Transmittance Probes in In-Line Near-Infrared Spectroscopy." Applied Spectroscopy 59, no. 4 (2005): 487–95. http://dx.doi.org/10.1366/0003702053641522.

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This article addresses problems related to transfer of calibration models due to variations in distance between the transmittance fiber-optic probes. The data have been generated using a mixture design and measured at five different probe distances. A number of techniques reported in the literature have been compared. These include multiplicative scatter correction (MSC), path length correction (PLC), finite impulse response (FIR), orthogonal signal correction (OSC), piecewise direct standardization (PDS), and robust calibration. The quality of the predictions was expressed in terms of root me

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Shi, Weimin, Qiang Liang, and Lei Sun. "Path Planning for Yarn Changing Robots Based on NRBO and Dynamic Obstacle Avoidance Strategy." Applied Sciences 14, no. 23 (2024): 11086. http://dx.doi.org/10.3390/app142311086.

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To address the shortcomings of traditional bionic algorithms in path planning, such as inefficient search processes, extended planning distances and times, and suboptimal dynamic obstacle avoidance, this paper introduces a fusion algorithm called NRBO-DWA. This algorithm is specifically applied to plan the path for a tube-changing robot in a knitting workshop. The process begins with spatial modeling based on the actual parameters of the workshop, followed by the development of a comprehensive, objective function for the robot in line with the relevant constraints. The NRBO algorithm is then i

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Min, J. E., S. K. Lee, and J. H. Ryu. "ADVANCED SURFACE-REFLECTED RADIANCE CORRECTION FOR AIRBORNE HYPERSPECTRAL IMAGERY IN COASTAL RED TIDE DETECTION." ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences V-3-2021 (June 17, 2021): 73–80. http://dx.doi.org/10.5194/isprs-annals-v-3-2021-73-2021.

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Abstract. Red tides are among the most common coastal hazards, causing serious damage to the coastal environment. Many satellite sensors can detect red tide blooms, but are limited in their detection of the exact area of the bloom and biological abundance in terms of spatial and spectral resolution. The high spatial and spectral resolutions of hyperspectral airborne remote sensing data may help overcome these limitations to analyze red tide blooms more effectively. To identify potential applications of hyperspectral airborne data in red tide detection, an integrated field campaign was performe

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Torres, Elizabeth B., and David Zipser. "Reaching to Grasp With a Multi-Jointed Arm. I. Computational Model." Journal of Neurophysiology 88, no. 5 (2002): 2355–67. http://dx.doi.org/10.1152/jn.00030.2002.

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The generation of goal-directed movements requires the solution of many difficult computational problems. Among these are transformations from extrinsic to intrinsic reference frames, specifying solution paths, removing under-specification due to excess degrees of freedom and path multiplicity, constraint satisfaction, and error correction. There are no current motor-control computational models that address these issues in the context of realistic arm movement with redundant degrees of freedom. In this paper, we conjecture there is a geometric stage between sensory input and physical executio

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Zheng, Xiaofei, Hantao Zhao, Songhui Zhang, Dan Liu, and Binrui Wang. "Design Method of Cam Steering Mechanism Based on Path Fitting." Processes 12, no. 5 (2024): 1037. http://dx.doi.org/10.3390/pr12051037.

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In order to improve the accuracy of a solar-powered punch card car’s movement on a designated route and reduce positional deviations during its operation, a solar-powered punch card car with a single cam as the steering guidance mechanism was designed. The car adopts a three-wheel structure. The transmission mechanism, steering mechanism, driving mechanism, and regulating mechanism of the car were analyzed. The kinematics model of the car was established and the motion characteristics of the car were obtained. By analyzing the relationship between the steering angle of the car and the curvatur

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Surmick, David M., and Christian G. Parigger. "Tracking Temporal Development of Optical Thickness of Hydrogen Alpha Spectral Radiation in a Laser-Induced Plasma." Atoms 7, no. 4 (2019): 101. http://dx.doi.org/10.3390/atoms7040101.

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In this paper, we consider the temporal development of the optical density of the H α spectral line in a hydrogen laser-induced plasma. This is achieved by using the so-called duplication method in which the spectral line is re-imaged onto itself and the ratio of the spectral line with it duplication is taken to its measurement without the duplication. We asses the temporal development of the self-absorption of the H α line by tracking the decay of duplication ratio from its ideal value of 2. We show that when 20% loss is considered along the duplication optical path length, the ratio is 1.8 a

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Guo, Yan, Aiguo Song, Jiatong Bao, Tang Hongru, and Jianwei Cui. "A Combination of Terrain Prediction and Correction for Search and Rescue Robot Autonomous Navigation." International Journal of Advanced Robotic Systems 6, no. 3 (2009): 24. http://dx.doi.org/10.5772/7229.

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This paper presents a novel two-step autonomous navigation method for search and rescue robot. The algorithm based on the vision is proposed for terrain identification to give a prediction of the safest path with the support vector regression machine (SVRM) trained off-line with the texture feature and color features. And correction algorithm of the prediction based the vibration information is developed during the robot traveling, using the judgment function given in the paper. The region with fault prediction will be corrected with the real traversability value and be used to update the SVRM

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15

García-Botella, Angel, Lun Jiang, and Roland Winston. "Flowline Optical Simulation to Refractive/Reflective 3D Systems: Optical Path Length Correction." Photonics 6, no. 4 (2019): 101. http://dx.doi.org/10.3390/photonics6040101.

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Nonimaging optics is focused on the study of techniques to design optical systems for the purpose of energy transfer instead of image forming. The flowline optical design method, based on the definition of the geometrical flux vector J, is one of these techniques. The main advantage of the flowline method is its capability to visualize and estimate how radiant energy is transferred by the optical systems using the concepts of vector field theory, such as field line or flux tube, which overcomes traditional raytrace methods. The main objective this paper is to extend the flowline method to anal

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16

Liu, Keyang, Hongyang Li, Xinliang Wang, Yanqi Liu, Liwei Song, and Yuxin Leng. "Timing Fluctuation Correction of A Femtosecond Regenerative Amplifier." Crystals 11, no. 10 (2021): 1242. http://dx.doi.org/10.3390/cryst11101242.

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We report on the long-term correction of a timing fluctuation between the femtosecond regenerative amplifier and the reference oscillator for the seed 100 PW laser system in the Station of Extreme Light (SEL). The timing fluctuation was characterized by a noncollinear balanced optical cross-correlator that maps the time difference to the sum frequency intensity of the amplifier and oscillator laser pulses. A feedback loop was employed to correct the timing jitter by adjusting the time delay line in the amplifier beam path. The timing fluctuation was reduced to 1.26 fs root-mean-square from hun

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17

Saeed Al-khayyt, Saad Zaghlul. "Creating Through Points in Linear Function with Parabolic Blends Path by Optimization Method." Al-Khwarizmi Engineering Journal 14, no. 1 (2018): 77–89. http://dx.doi.org/10.22153/https://doi.org/10.22153/kej.2018.10.005.

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The linear segment with parabolic blend (LSPB) trajectory deviates from the specified waypoints. It is restricted to that the acceleration must be sufficiently high. In this work, it is proposed to engage modified LSPB trajectory with particle swarm optimization (PSO) so as to create through points on the trajectory. The assumption of normal LSPB method that parabolic part is centered in time around waypoints is replaced by proposed coefficients for calculating the time duration of the linear part. These coefficients are functions of velocities between through points. The velocities are obtain

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Saeed Al-khayyt, Saad Zaghlul. "Creating Through Points in Linear Function with Parabolic Blends Path by Optimization Method." Al-Khwarizmi Engineering Journal 14, no. 1 (2018): 77–89. http://dx.doi.org/10.22153/kej.2018.10.005.

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The linear segment with parabolic blend (LSPB) trajectory deviates from the specified waypoints. It is restricted to that the acceleration must be sufficiently high. In this work, it is proposed to engage modified LSPB trajectory with particle swarm optimization (PSO) so as to create through points on the trajectory. The assumption of normal LSPB method that parabolic part is centered in time around waypoints is replaced by proposed coefficients for calculating the time duration of the linear part. These coefficients are functions of velocities between through points. The velocities are obtain

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19

Dewi, Esthi Kurnia, and Bambang Trisakti. "COMPARING ATMOSPHERIC CORRECTION METHODS FOR LANDSAT OLI DATA." International Journal of Remote Sensing and Earth Sciences (IJReSES) 13, no. 2 (2017): 105. http://dx.doi.org/10.30536/j.ijreses.2016.v13.a2472.

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Landsat data used for monitoring activities to land cover because it has spatial resolution and high temporal. To monitor land cover changes in an area, atmospheric correction is needed to be performed in order to obtain data with precise digital value picturing current condition. This study compared atmospheric correction methods namely Quick Atmospheric Correction (QUAC), Dark Object Subtraction (DOS) and Fast Line-of-sight Atmospheric Analysis of Spectral Hypercubes (FLAASH). The correction results then were compared to Surface Reflectance (SR) imagery data obtained from the United States G

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Liu, Xinjie, Jian Guo, Jiaochan Hu, and Liangyun Liu. "Atmospheric Correction for Tower-Based Solar-Induced Chlorophyll Fluorescence Observations at O2-A Band." Remote Sensing 11, no. 3 (2019): 355. http://dx.doi.org/10.3390/rs11030355.

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Solar-induced chlorophyll fluorescence (SIF) has been proven to be an efficient indicator of vegetation photosynthesis. To investigate the relationship between SIF and Gross Primary Productivity (GPP), tower-based continuous spectral observations coordinated with eddy covariance (EC) measurements are needed. As the strong absorption effect at the O2-A absorption bands has an obvious influence on SIF retrieval based on the Fraunhofer Line Discrimination (FLD) principle, atmospheric correction is required even for tower-based SIF observations made with a sensor tens of meters above the canopy. I

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Zhang, Yiming, and Kejian Shang. "Building information modeling-based production process optimization model." Journal of Computational Methods in Sciences and Engineering 24, no. 4-5 (2024): 2705–18. http://dx.doi.org/10.3233/jcm-247502.

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In the current manufacturing process of enterprises, there are some problems such as poor predictability and low level of intelligence, which lead to high product error rate and affect production efficiency. Therefore, this paper introduces the building information model in the field of engineering construction, and proposes a big data predictive manufacturing model based on the building information model, which divides the production process into production service system, resource planning system, production control system and after-sales service system, and realizes the overall process opti

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Roychoudhuri, Lopamudra, and Ehab S. Al-Shaer. "Autonomic QoS Optimization of Real-Time Internet Audio Using Loss Prediction and Stochastic Control." International Journal of Adaptive, Resilient and Autonomic Systems 1, no. 3 (2010): 81–107. http://dx.doi.org/10.4018/jaras.2010070105.

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Quality of Internet audio is highly sensitive to packet loss caused by congestion in links. Packet loss for audio is normally rectified by adding redundancy using Forward Error Correction (FEC). Alternatively, path diversity mechanisms are used to improve reliability and thus session quality. To achieve optimized receiver audio quality for transmissions using single or multiple paths, the authors propose a self-adaptive joint Error and Rate Control framework based on packet loss prediction and on-line quality assessment. The Error Control chooses appropriate FEC proactively to preserve quality

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Song, Ling, Wei Ni, Wenzhi Wang, et al. "A novel intelligent microcatheter-shaping method for embolization of intracranial aneurysm." Journal of Neurorestoratology 9, no. 3 (2021): 196–207. http://dx.doi.org/10.26599/jnr.2021.9040022.

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Objective:This study proposed and validated an intelligent microcatheter-shaping algorithm for interventional embolization of intracranial aneurysms.Methods:A stepwise microcatheter simulation algorithm constrained by a vessel center line was developed based on the geometry of aneurysms and parent arteries, and a collision correction factor of vessel walls was introduced to automatically calculate the optimal microcatheter path and tip shape. The efficacy of this intelligent shaping method was verified in an in vitro aneurysm model experiment.Results:The microcatheter path can be automatically

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Xu, Haoran, Yi Li, and Yucheng Lu. "Research on Indoor AGV Fusion Localization Based on Adaptive Weight EKF Using Multi-sensor." Journal of Physics: Conference Series 2428, no. 1 (2023): 012028. http://dx.doi.org/10.1088/1742-6596/2428/1/012028.

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Abstract To solve the problem of large accumulative errors of wheel odometer and inertial measurement unit (IMU), which make pose calculation mistakes due to friction coefficient of the ground or bumps and collisions, furthermore, affect path planning and navigation of automated guided vehicle (AGV), an extensible fusion localization method based on multiple sensors is proposed. Based on the traditional extended Kalman filter (EKF), the internal positioning data is used for prediction, while the external positioning data is used for correction. According to the states of different sensors, the

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Volkova, Tamara A., Yulia E. Balykina, and Alexander Bespalov. "Predicting Ship Trajectory Based on Neural Networks Using AIS Data." Journal of Marine Science and Engineering 9, no. 3 (2021): 254. http://dx.doi.org/10.3390/jmse9030254.

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To create an autonomously moving vessel, it is necessary to know exactly how to determine the current coordinates of the vessel in the selected coordinate system, determine the actual trajectory of the vessel, estimate the motion trend to predict the current coordinates, and calculate the course correction to return to the line of the specified path. The navigational and hydrographic conditions of navigation on each section of the route determine the requirements for the accuracy of observations and the time spent on locating the vessel. The problem of predicting the trajectory of the vessel’s

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Xue, Zhehua, and Lei Li. "Rapid and green detection of manganese in electrolytes by ultraviolet-visible spectrometry to control pollutant discharge." PLOS ONE 17, no. 2 (2022): e0264532. http://dx.doi.org/10.1371/journal.pone.0264532.

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Controlling the manganese (Mn2+) concentration is important to product quality in the electrolytic manganese industry. Conventional methods for detecting Mn2+ are complex and reagent-consuming, which makes them slow and polluting. It is of great significance to develop a new fast and environmentally friendly method to quantify Mn2+ in electrolyte. The characteristic ultraviolet-visible (UV-vis) absorbance at 401 nm of Mn2+ will vary linearly with the Mn2+ concentration after data correction. Adjusting the pH, calibrating the spectral bandwidth (SBW) and optical path length (OPL), and subtracti

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Moga, Nikolay. "MUSCLE SPASTICITY AND ITS INTERACTION WITH MYOFASCIAL SYSTEM OF CHILDREN WITH CENTRAL PARESIS." EUREKA: Health Sciences 4 (July 31, 2019): 35–41. http://dx.doi.org/10.21303/2504-5679.2019.00954.

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Traditionally, the problem of muscle spasticity was considered by experts as a kind of local problem associated with the inhibition or traumatisation of the central motor neuron in a certain part of its path. According to this approach, only the first stage of the causal relationship of the two systems was reflected: the nervous and the muscular systems. In the following, intrasystem relations of the muscle and muscle complex appeared according to the type of harmonization or destructivization of the activity of this system. To resolve this problematic situation, the article examines the origi

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Nikolay, Moga. "MUSCLE SPASTICITY AND ITS INTERACTION WITH MYOFASCIAL SYSTEM OF CHILDREN WITH CENTRAL PARESIS." EUREKA: Health Sciences 4 (July 31, 2019): 35–41. https://doi.org/10.21303/2504-5679.2019.00954.

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Traditionally, the problem of muscle spasticity was considered by experts as a kind of local problem associated with the inhibition or traumatisation of the central motor neuron in a certain part of its path. According to this approach, only the first stage of the causal relationship of the two systems was reflected: the nervous and the muscular systems. In the following, intrasystem relations of the muscle and muscle complex appeared according to the type of harmonization or destructivization of the activity of this system. To resolve this problematic situation, the article examines the origi

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Peltola, Olli, Toprak Aslan, Andreas Ibrom, Eiko Nemitz, Üllar Rannik, and Ivan Mammarella. "The high-frequency response correction of eddy covariance fluxes – Part 1: An experimental approach and its interdependence with the time-lag estimation." Atmospheric Measurement Techniques 14, no. 7 (2021): 5071–88. http://dx.doi.org/10.5194/amt-14-5071-2021.

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Abstract. The eddy covariance (EC) technique has emerged as the prevailing method to observe the ecosystem–atmosphere exchange of gases, heat and momentum. EC measurements require rigorous data processing to derive the fluxes that can be used to analyse exchange processes at the ecosystem–atmosphere interface. Here we show that two common post-processing steps (time-lag estimation via cross-covariance maximisation and correction for limited frequency response of the EC measurement system) are interrelated, and this should be accounted for when processing EC gas flux data. These findings are ap

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Sutisna, Setya Permana, I. Dewa Made Subrata, and Radite Praeko Agus Setiawan. "SISTEM PENGENDALI KEMUDI TRAKTOR OTOMATIS EMPAT RODA PADA PENGUJIAN LINTASAN LURUS (Tracking Control System of Autonomous Four Wheel Tractor on Straight Path)." Jurnal Agritech 35, no. 01 (2015): 106. http://dx.doi.org/10.22146/agritech.9425.

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This research is the development of autonomous tractor. Although research for automatic tractor have been carried out, but it is still developed to get more precision and optimal method. The purpose of this research is to develop a trajectory control system tractor to follow a straight-line when the working soil tillage. Model that was developed tobe able calculate steering angle correction of the tractor position so that the tractor will run on a reference trajectory. Tractor position is determined from RTK DGPS. Tractor direction is calculated from two position of tractor. Control algorithm

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Khalifah, Peter. "Use of radial symmetry for the calculation of cylindrical absorption coefficients and optimal capillary loadings." Journal of Applied Crystallography 48, no. 1 (2015): 149–58. http://dx.doi.org/10.1107/s1600576714026569.

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The problem of numerically evaluating absorption correction factors for cylindrical samples has been revisited using a treatment that fully takes advantage of the sample symmetry. It is shown that the path lengths for all points within the sample at all possible diffraction angles can be trivially determined once the angle-dependent distance distribution for a single line of points is calculated. This provides advantages both in computational efficiency and in gaining an intuitive understanding of the effects of absorption on the diffraction data. A matrix of absorption coefficients calculated

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Xu, Xian. "The Ethical Dilemma of Social Violence Under the View Valve of Habermas' Communication Theory and Its Correction Path: A Case Study of "Tangshan Beating Incident"." Frontiers in Business, Economics and Management 6, no. 1 (2022): 202–6. http://dx.doi.org/10.54097/fbem.v6i1.2421.

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Late capitalism alienated the ethics of social communication, and the reconstruction of the "normative basis" of social communication, according to Habermas, lies in the return of noumenon to the "life world", and the occurrence of "communication behavior" in accordance with linguistic rationality, mutual respect, and dilution of instrumental rationality. The "Tangshan beating incident" as the typical social violence broke through the bottom line of the social ethics system based on the sensibility of rule by virtue and the rationality of rule by law, so that the people's "sense of security" i

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Wang, Jingjing, and Joongoo Park. "An Enhanced Indoor Positioning Algorithm Based on Fingerprint Using Fine-Grained CSI and RSSI Measurements of IEEE 802.11n WLAN." Sensors 21, no. 8 (2021): 2769. http://dx.doi.org/10.3390/s21082769.

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Received signal strength indication (RSSI) obtained by Medium Access Control (MAC) layer is widely used in range-based and fingerprint location systems due to its low cost and low complexity. However, RSS is affected by noise signals and multi-path, and its positioning performance is not stable. In recent years, many commercial WiFi devices support the acquisition of physical layer channel state information (CSI). CSI is an index that can characterize the signal characteristics with more fine granularity than RSS. Compared with RSS, CSI can avoid the effects of multi-path and noise by analyzin

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Chimot, J., T. Vlemmix, J. P. Veefkind, J. F. de Haan, and P. F. Levelt. "Impact of aerosols on the OMI tropospheric NO<sub>2</sub> retrievals over industrialized regions: how accurate is the aerosol correction of cloud-free scenes via a simple cloud model?" Atmospheric Measurement Techniques Discussions 8, no. 8 (2015): 8385–437. http://dx.doi.org/10.5194/amtd-8-8385-2015.

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Abstract. The Ozone Monitoring Instrument (OMI) instrument has provided daily global measurements of tropospheric NO2 for more than a decade. Numerous studies have drawn attention to the complexities related to measurements of tropospheric NO2 in the presence of aerosols. Fine particles affect the OMI spectral measurements and the length of the average light path followed by the photons. However, they are not explicitly taken into account in the current OMI tropospheric NO2 retrieval chain. Instead, the operational OMI O2-O2 cloud retrieval algorithm is applied both to cloudy scenes and to clo

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Wu, Tsu-Hsin, Chien-Yu Liao, Chien-Hung Yeh, et al. "A Self-Healing WDM Access Network with Protected Fiber and FSO Link Paths Effective Against Fiber Breaks." Photonics 12, no. 4 (2025): 323. https://doi.org/10.3390/photonics12040323.

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In this article, an additional protected fiber and free-space optical (FSO) link path is proposed, to provide self-healing capabilities for protection against fiber faults in wavelength division multiplexed passive optical network (WDM-PON) systems. The new optical line terminal (OLT), remote node (RN), and optical network unit (ONU) in the presented PON architecture result in self-protective function against fiber breakpoints. In the measurement, 25 Gbit/s on-off keying (OOK) modulation was applied on each WDM channel to assess the downstream and upstream signals after 25 km single-mode fiber

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Dammayatri, Retno, Tri Muji Susantoro, and Ketut Wikantika. "Green Open Space and Barren Land Mapping for Flood Mitigation in Jakarta, the Capital of Indonesia." Indonesian Journal of Geography 55, no. 2 (2023): 197. http://dx.doi.org/10.22146/ijg.76452.

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High levels of rainfall, tidal flooding, land subsidence, intensified urban development, scarce barren land and a shortage of green open spaces (GOS) are contributing factors to the persistent flooding in Jakarta. Therefore, this study was conducted to map the GOS, built-up, and barren land in the city in order to calculate the biopore infiltration hole (LRB) potential for water infiltration as part of Jakarta's flood mitigation efforts using the Landsat 8 operational land imager (OLI). The Landsat data acquired on September 11, 2019, with path/row 122/064 were processed using the Fast Line-of

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Dani, Tiar, Rhorom Priyatikanto, Slamet Supriadi, Abdul Rachman, and Amrullah A. Qadir. "PENGARUH AKTIVITAS MATAHARI TERHADAP KERAPATAN ATMOSFER ATAS BERDASARKAN DATA POSISI GPS SATELIT LAPAN-A2 (SOLAR ACTVITY INFLUENCE ON THE UPPER ATMOSPHERIC DENSITY DERIVED FROM GPS DATA ON LAPAN-A2 SATELLITE)." Jurnal Sains Dirgantara 14, no. 2 (2018): 127. http://dx.doi.org/10.30536/j.jsd.2017.v14.a2550.

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Studies on atmospheric density were very important to obtain a correction factor for the atmospheric density model. Thus, improvement of atmospheric models accuracy, i.e. CIRA, JASCHIA, NRLMSISE, became important in its application for re-entry prediction, satellite tracking and mitigation of the collisions probability between active satellites with space debris. GPS equipment installed in LAPAN-A2 indirectly measured the upper atmospheric density variation in-situ from the satellite orbit path. Notwithstanding the measurement had a lower temporal resolution than using accelerometer, but still

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Stuik, Remko, Laurent Jolissaint, Sarah Kendrew, Stefan Hippler, and Bernhard Brandl. "Extreme adaptive optics in the mid-IR: The METIS AO system." Proceedings of the International Astronomical Union 5, H15 (2009): 531. http://dx.doi.org/10.1017/s1743921310010549.

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METIS, the Mid-infrared ELT Imager and Spectrograph, is currently in its phase A study as one of the candidate first-light instruments for the European Extremely Large Telescope. METIS will feature several observational modes, ranging from diffraction limited imaging in L, M and N-bands to high-resolution Integral Field spectroscopy for the L and M-bands. METIS in its current design gives sensitivities similar to Spitzer in imaging and low-resolution spectroscopy and with its high-resolution spectrograph will provide unprecedented line sensitivity. The design of METIS is optimized for both gal

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Algarín-Pinto, Juan Antonio, Luis E. Garza-Castañón, Adriana Vargas-Martínez, and Luis I. Minchala-Ávila. "Modeling, Trajectory Analysis and Waypoint Guidance System of a Biomimetic Underwater Vehicle Based on the Flapping Performance of Its Propulsion System." Electronics 11, no. 4 (2022): 544. http://dx.doi.org/10.3390/electronics11040544.

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The performance of biomimetic underwater vehicles directly depends on the correct design of their propulsion system and its control. These vehicles can attain highly efficient motion, hovering and thrust by properly moving part(s) of their bodies. In this article, a mathematical modeling and waypoint guidance system for a biomimetic autonomous underwater vehicle (BAUV) is proposed. The BAUV achieves sideways and dorsoventral thunniform motion by flapping its caudal fin through a parallel mechanism. Also, an analysis of the vehicle’s design is presented. A thrust analysis was performed based on

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Chimot, J., T. Vlemmix, J. P. Veefkind, J. F. de Haan, and P. F. Levelt. "Impact of aerosols on the OMI tropospheric NO<sub>2</sub> retrievals over industrialized regions: how accurate is the aerosol correction of cloud-free scenes via a simple cloud model?" Atmospheric Measurement Techniques 9, no. 2 (2016): 359–82. http://dx.doi.org/10.5194/amt-9-359-2016.

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Abstract. The Ozone Monitoring Instrument (OMI) has provided daily global measurements of tropospheric NO2 for more than a decade. Numerous studies have drawn attention to the complexities related to measurements of tropospheric NO2 in the presence of aerosols. Fine particles affect the OMI spectral measurements and the length of the average light path followed by the photons. However, they are not explicitly taken into account in the current operational OMI tropospheric NO2 retrieval chain (DOMINO – Derivation of OMI tropospheric NO2) product. Instead, the operational OMI O2 − O2 cloud retrie

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Simon, Katharine, Alexis Fenger, Laura Warren, et al. "0121 Sleep facilitates memory, but not navigation across the pubertal transition in the novel Minecraft Memory and Navigation Task." Sleep 45, Supplement_1 (2022): A54. http://dx.doi.org/10.1093/sleep/zsac079.119.

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Abstract Introduction The hippocampus uniquely supports the acquisition and retention of spatial information, and sleep supports the consolidation of hippocampal-dependent memories. However, support for the role of sleep in spatial memory and navigation is mixed. We developed and tested a novel Minecraft Memory and Navigation (MMN) task in adults which showed that sleep uniquely supports the memory for spatial locations, but navigation improved regardless of delay condition (Simon et al., submitted). Here, we tested participants during the developmental transition from childhood to adolescence

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Zahidi, Usman A., Ayan Chatterjee, and Peter W. T. Yuen. "A Radiative Transfer Model-Based Multi-Layered Regression Learning to Estimate Shadow Map in Hyperspectral Images." Machine Learning and Knowledge Extraction 1, no. 3 (2019): 904–27. http://dx.doi.org/10.3390/make1030052.

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The application of Empirical Line Method (ELM) for hyperspectral Atmospheric Compensation (AC) premises the underlying linear relationship between a material’s reflectance and appearance. ELM solves the Radiative Transfer (RT) equation under specialized constraint by means of in-scene white and black calibration panels. The reflectance of material is invariant to illumination. Exploiting this property, we articulated a mathematical formulation based on the RT model to create cost functions relating variably illuminated regions within a scene. In this paper, we propose multi-layered regression

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Zhou, Heng, and Takuya Maekawa. "Predicting Signal Reception Information from GNSS Satellites in Indoor Environments without Site Survey: Towards Opportunistic Indoor Positioning Based on GNSS Fingerprinting." Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies 8, no. 3 (2024): 1–30. http://dx.doi.org/10.1145/3678554.

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While traditional GPS localization is impractical in certain indoor environments, GPS satellites offer a valuable source of indoor contextual information, particularly around window-side areas where signals are more accessible. This study introduces a new method that predicts GPS signal reception information in a target indoor environment without the need for actual data collection in the target environment. By predicting the strengths of GPS signals that are expected to be measured at various indoor positions, we can construct a GPS signal reception map of a target environment, which function

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Wanotayaroj, C., E. Mendes, S. Baron, and S. Kulis. "DART28-FPGA implementation study for future high-speed links." Journal of Instrumentation 18, no. 01 (2023): C01024. http://dx.doi.org/10.1088/1748-0221/18/01/c01024.

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Abstract The data link from the detectors to the back-end stage must keep up with the requirements from the upcoming generation of High Energy Physics experiments. Last year, we presented at TWEPP the investigation on the feasibility and limitation of high data-rate links based on the 4-Level Pulse-Amplitude Modulation (PAM4) technology. Commercial PAM4 technology poses strict constraints on the data rate of links which translates into a highly complex rad-hard SerDes design. Alternatively, pushing the limit of the Non-Return to Zero (NRZ) modulated signals, a line rate of up to 28 Gbps can be

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Dase, Sulwan, and Irawati Razak. "Optimization of an inset-fed calculations for rectangular microstrip antenna." Computer Science and Information Technologies 4, no. 2 (2023): 143–48. https://doi.org/10.11591/csit.v4i2.pp143-148.

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This paper offers an alternative solution to produce a formula to calculate the inset-fed (𝒚𝟎 ) feed distance from the edge of the patch in order to obtain the impedance of a rectangular patch microstrip antenna as close to 50 Ohm as possible. The basic calculation refers to Ramesh's calculation formula to calculate the inset-fed (𝒚𝟎 ) on a rectangular patch microstrip antenna. From this research it is hoped that a number of correction factors will be obtained which will be multiplied by the Ramesh formula in order to obtain an insetfed calculation which results in a lower return loss (𝑺𝟏𝟏) an

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Ryabushenko, Olexander, and Olexander Prosvirnin. "Simulation of turning traffic at a controlled inter-section." Bulletin of Kharkov National Automobile and Highway University 1, no. 101 (2023): 156. http://dx.doi.org/10.30977/bul.2219-5548.2023.101.0.156.

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Problem. Optimizing the parameters of traffic light regulation can reduce delays and queues of vehicles, increase the throughput of intersections, and thus increase the quality of the functioning of the city's transport network. This question is especially relevant for Ukraine, because in these conditions it is impossible to carry out a significant modernization of the city's transport network, but within the framework of the post-war reconstruction of the city, it is possible to carry out the improvement of the geometric parameters of the intersection. However, among all the factors that affe

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Qadan, Mahmoud, and Joseph Yagil. "Are international economic and financial co-movements characterized by asymmetric co-integration?" Review of Accounting and Finance 14, no. 4 (2015): 398–412. http://dx.doi.org/10.1108/raf-02-2015-0026.

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Purpose – The recent economic crises have attracted attention to the issue of international equity co-movements and correlations. Using data from 1980 to 2010, the authors examine the international co-movements of both real economic activity, as reflected in industrial production and the gross domestic product (GDP), and financial activity, as reflected in equity market returns. While classic symmetric co-integration tests do not reject the hypothesis of no co-integration, the authors find evidence of asymmetric co-integration in these three variables between the USA and the rest of the Group

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Nekrasov, R. Yu, U. S. Putilova, A. I. Starikov, I. V. Soloviev, and K. V. Kuskov. "MODELING OF TECHNOLOGY PROCESSES OF DIAGNOSTICS AND CONTROL OF NC WORKING." Oil and Gas Studies, no. 3 (June 30, 2015): 101–6. http://dx.doi.org/10.31660/0445-0108-2015-3-101-106.

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A problem of improvement of precision of engineering products NC working is considered. A solution is offered to solve this problem through ensuring the introducing the on-line corrections into the machines actuators path motion. The necessity is proved of creating the mathematical models of the processes of diagnostics of the system «machine - attachment - tool - slug».

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Dase, Sulwan, and Irawati Razak. "Optimization of an inset-fed calculations for rectangular microstrip antenna." Computer Science and Information Technologies 4, no. 2 (2023): 143–48. http://dx.doi.org/10.11591/csit.v4i2.p143-148.

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This paper offers an alternative solution to produce a formula to calculate the inset-fed (y0) feed distance from the edge of the patch in order to obtain the impedance of a rectangular patch microstrip antenna as close to 50 Ohm as possible. The basic calculation refers to Ramesh's calculation formula to calculate the inset-fed (y0) on a rectangular patch microstrip antenna. From this research it is hoped that a number of correction factors will be obtained which will be multiplied by the Ramesh formula in order to obtain an inset-fed calculation which results in a lower return loss (S11) and

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Dase, Sulwan, and Irawati Razak. "Optimization of an inset-fed calculations for rectangular microstrip antenna." Computer Science and Information Technologies 4, no. 2 (2023): 143–48. http://dx.doi.org/10.11591/csit.v4i2.pp143-148.

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This paper offers an alternative solution to produce a formula to calculate the inset-fed (????????) feed distance from the edge of the patch in order to obtain the impedance of a rectangular patch microstrip antenna as close to 50 Ohm as possible. The basic calculation refers to Ramesh's calculation formula to calculate the inset-fed (????????) on a rectangular patch microstrip antenna. From this research it is hoped that a number of correction factors will be obtained which will be multiplied by the Ramesh formula in order to obtain an inset-fed calculation which results in a lower return lo

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