scholarly journals Bathymetric Measurements of a Retention Reservoir using Integrated Hydrographic and Photogrammetric Techniques

2022 ◽  
Vol 24 (1) ◽  
pp. E19-E27
Author(s):  
Błażej Mach ◽  
Michał Skrzypek
Keyword(s):  
High Precision ◽  
Satellite Images ◽  
Direct Impact ◽  
Practical Application ◽  
Measurement Campaign ◽  
Depth Data

The purpose of this paper was to determine the usability of unmanned hydrographic drones and photogrammetric techniques during the conduct of work, the results of which are potentially to serve as navigational materials in areas that, due to their characteristics, make it impossible to carry out research using crew vessels and direct shoreline determination. In order to prepare and carry out the measurement campaign with the greatest possible accuracy and safety, the authors of the article decided to determine the shoreline of the analyzed reservoir using photogrammetric methods. The use of satellite images allowed the border between land and water to be identified as precisely as possible, which had a direct impact on the accuracy of relating depth data to their location on Earth's globe. Use of unmanned vessels and orthophotos can find practical application when navigating vessels during maneuvers required high precision.

scholarly journals Bathymetry Time Series Using High Spatial Resolution Satellite Images

Water ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 531 ◽  
Author(s):  
Manuel Erena ◽  
José A. Domínguez ◽  
Joaquín F. Atenza ◽  
Sandra García-Galiano ◽  
Juan Soria ◽  
...  
Keyword(s):  
High Precision ◽  
Spatial Resolution ◽  
Satellite Images ◽  
Environmental Variability ◽  
High Spatial Resolution ◽  
Numerical Models ◽  
Three Dimensional ◽  
Satellite System ◽  
Precision Data ◽  
Mar Menor

The use of the new generation of remote sensors, such as echo sounders and Global Navigation Satellite System (GNSS) receivers with differential correction installed in a drone, allows the acquisition of high-precision data in areas of shallow water, as in the case of the channel of the Encañizadas in the Mar Menor lagoon. This high precision information is the first step to develop the methodology to monitor the bathymetry of the Mar Menor channels. The use of high spatial resolution satellite images is the solution for monitoring many hydrological changes and it is the basis of the three-dimensional (3D) numerical models used to study transport over time, environmental variability, and water ecosystem complexity.

Design and Application of Large Torque Electrical Load Simulator

2013 ◽  
Vol 427-429 ◽  
pp. 660-663
Author(s):  
Zhi Qiang Wei
Keyword(s):  
Mathematical Model ◽  
High Precision ◽  
Hybrid Control ◽  
Electrical Load ◽  
Practical Application ◽  
Compensation Control ◽  
Torque Load ◽  
Load Simulator ◽  
Surplus Torque ◽  
Rudder Angle

In order to meet the testing requirement of positive and reverse operation large torque load for new rudder, an electrical load simulator is designed. The system mathematical model is established and the feedforward compensation control of torque and rudder angle is adopted to restrain the surplus torque according to the principle of invariance. The high precision large torque load under positive and reverse operation for rudder is realized by torque and position hybrid control. The practical application shows that the proposed method can effectively restrain surplus torque and the system meets the high precision torque load under positive and reverse operation for rudder very well.

An Angle Measuring System for Knife Blade Based on Laser and Electronic Clinometer

2011 ◽  
Vol 339 ◽  
pp. 80-83
Author(s):  
Fen Ju An ◽  
Yu Jun Feng ◽  
Zhong Ming Tan ◽  
Wen Qing Shi ◽  
Zheng Ye Xiong ◽  
...  
Keyword(s):  
High Precision ◽  
Low Cost ◽  
Measuring System ◽  
Practical Application ◽  
Blade Angle ◽  
Angle Measuring ◽  
Knife Blade ◽  
Easy Operation

In order to measure the knife blade angle, which has a great impact on sharpness and sharpness retentivity of knives and scissors, an angle measuring system for knife blade based on laser and electronic clinometer is presented. Practical running and testing proved the system's feasibility, reliability and great value in practical application. Meanwhile, the system has many advantages, such as easy operation, low cost, high precision, small errors, non-contact, etc.

Layered compression for high-precision depth data

2015 ◽  
Vol 24 (12) ◽  
pp. 5492-5504 ◽  
Author(s):  
Dan Miao ◽  
Jingjing Fu ◽  
Yan Lu ◽  
Shipeng Li ◽  
Chang Wen Chen
Keyword(s):  
High Precision ◽  
Depth Data

Application of ADS8364 on the Attitude and Heading Reference

2014 ◽  
Vol 602-605 ◽  
pp. 2789-2793
Author(s):  
Li Jun Song ◽  
Zhong Xing Duan ◽  
Deng Feng Chen ◽  
Sheng Jun Xu ◽  
Ji Wu Sun
Keyword(s):  
Data Collection ◽  
High Precision ◽  
Practical Application ◽  
Mems Sensor ◽  
Complete Processing ◽  
Parallel Output

ADS8364 is a sixteen-bit parallel output that is sampling and conversion at the same time by six channels. It is a kind of high-precision chip sampling in power. ADS8364 is introduced which combined with practical application of DSP on the attitude and heading reference. ADS8364 which can carry out data collection of six channels is used in the attitude and heading reference for data collection of MEMS sensor of inertial. The data are transmitting to DSP which could complete processing of data and estimate of attitude. By analyzing the results of examination, the precision of MEMS gyroscope’s data which are collected by ADS8364 synchronously could satisfy the request of the attitude and heading reference.

Study on Antenna near Field Test System

2013 ◽  
Vol 718-720 ◽  
pp. 542-547
Author(s):  
Jun Ping Shang ◽  
Xin Rong Li ◽  
Li Chun Sun ◽  
Fei Fei Shang
Keyword(s):  
High Precision ◽  
Field Test ◽  
Measurement System ◽  
Continuous Wave ◽  
Near Field ◽  
Test System ◽  
Test Theory ◽  
Practical Application ◽  
Antenna Measurement ◽  
Pulse Test

Some novel researches on the application of the near-field antenna measurement and the measurement methods, main functions and technical indexes of the test system are presented in this paper. Based on the modern near-field test theory, the manufactured antenna measurement system gives a high precision performance. Continuous wave test and pulse test can be operated with the system. The practical application such as the multi-channel test, multi-frequency shows that the measurement system proposed is a high-precision, multi-functional and automatic system. Additional requirements of the production and current scientific research on the antenna measurement can be satisfied, too. The proposed measurement system is of great value in application and extension.

High precision methods for solving a system of cold plasma equations taking into account electron–ion collisions

2021 ◽  
Vol 36 (3) ◽  
pp. 139-155
Author(s):  
Eugene V. Chizhonkov ◽  
Mariya I. Delova ◽  
Olga S. Rozanova
Keyword(s):  
High Precision ◽  
Cold Plasma ◽  
Cauchy Problems ◽  
Practical Application ◽  
Relativistic Case ◽  
Breaking Effect ◽  
Ion Collisions ◽  
Lagrangian Variables ◽  
Theoretical Results ◽  
Account Electron

Abstract High precision simulation algorithms are proposed and justified for modelling cold plasma oscillations taking into account electron–ion collisions in the non-relativistic case. The specific feature of the approach is the use of Lagrangian variables for approximate solution of the problem formulated initially in Eulerian variables. High accuracy is achieved both through the use of analytical solutions on trajectories of particles and due to sufficient smoothness of the solution in numerical integration of Cauchy problems. Numerical experiments clearly illustrate the obtained theoretical results. As a practical application, a simulation of the well-known breaking effect of multi-period relativistic oscillations is carried out. It is shown that with an increase in the collision coefficient one can observe that the breaking process slows down until it is completely eliminated.

scholarly journals Reliable Indoor Pseudolite Positioning Based on a Robust Estimation and Partial Ambiguity Resolution Method

Sensors ◽  
2019 ◽  
Vol 19 (17) ◽  
pp. 3692 ◽  
Author(s):  
Xin Li ◽  
Guanwen Huang ◽  
Peng Zhang ◽  
Qin Zhang
Keyword(s):  
Kalman Filter ◽  
High Precision ◽  
Conventional Method ◽  
Ambiguity Resolution ◽  
Indoor Environment ◽  
Unscented Kalman Filter ◽  
Practical Application ◽  
Resolution Method ◽  
Positioning Accuracy ◽  
Linearized Model

The unscented Kalman filter (UKF) can effectively reduce the linearized model error and the dependence on initial coordinate values for indoor pseudolite (PL) positioning unlike the extended Kalman filter (EKF). However, PL observations are prone to various abnormalities because the indoor environment is usually complex. Standard UKF (SUKF) lacks resistance to frequent abnormal observations. This inadequacy brings difficulty in guaranteeing the accuracy and reliability of indoor PL positioning, especially for phase-based high-precision positioning. In this type of positioning, the ambiguity resolution (AR) will be difficult to achieve in the presence of abnormal observations. In this study, a robust UKF (RUKF) and partial AR (PAR) algorithm are introduced and applied in indoor PL positioning. First, the UKF is used for parameter estimation. Then, the anomaly recognition statistics and optimal ambiguity subset of PAR are constructed on the basis of the posterior residuals. The IGGIII scheme is adopted to weaken the influence of abnormal observation, and the PAR strategy is conducted in case of failure of the conventional PL-AR. The superiority of our proposed algorithm is validated using the measured indoor PL data for code-based differential PL (DPL) and phase-based real-time kinematic (RTK) positioning modes. Numerical results indicate that the positioning accuracy of RUKF-based indoor DPL is higher with a decimeter-level improvement compared that of the SUKF, especially in the presence of large gross errors. In terms of high-precision RTK positioning, RUKF can correctly identify centimeter-level anomalous observations and obtain a corresponding positioning accuracy improvement compared with the SUKF. When relatively large gross errors exist, the conventional method cannot easily realize PL-AR. By contrast, the combination of RUKF and the PAR algorithm can achieve PL-AR for the selected ambiguity subset successfully and can improve the positioning accuracy and reliability significantly. In summary, our proposed algorithm has certain resistance ability for abnormal observations. The indoor PL positioning of this algorithm outperforms that of the conventional method. Thus, the algorithm has some practical application value, especially for kinematic positioning.

scholarly journals La tecnología aeroespacial al servicio del ambiente

2019 ◽  
pp. 75-80 ◽  
Keyword(s):  
Remote Sensing ◽  
Environmental Management ◽  
Environmental Factors ◽  
Real Time ◽  
Satellite Images ◽  
Environment Interaction ◽  
Direct Impact ◽  
Aerospace Technology ◽  
Toma De Decisiones ◽  
German Aerospace

La tecnología aeroespacial al servicio del ambiente The aerospace technology serving to the environment Avid Roman Gonzalez TELECOM ParisTech, 46 rue Barrault, 75013 – Paris, Francia German Aerospace Center – DLR, Remote Sensing Institute, Oberpfaffenhofen 82234 Wessling, Germany Centre National d’Etudes Spatiales – CNES, Francia DOI: https://doi.org/10.33017/RevECIPeru2012.0013/ RESUMEN La biodiversidad es un tema que se encuentra hoy en día en el foco de numerosos debates sociales ligados a la relación hombre-ambiente y su impacto directo en la gestión del medio ambiente. En ese sentido, la tecnología aeroespacial juega un papel muy importante. En el presente artículo se presenta de manera general una revisión sobre los factores medioambientales que se deben tener en cuenta y que deben ser monitoreados para la toma de decisiones en aras de una preservación de nuestro ecosistema. También hablaremos de cómo es que la tecnología aeroespacial a través de diferentes satélites, ayudan de manera eficaz y casi en tiempo real con esta difícil tarea. Descriptores: ambiente, satélites, tecnología aeroespacial, monitorización, imágenes satelitales. ABSTRACT Biodiversity is an issue that is now the focus of many social debates linked to the man-environment interaction and its direct impact on environmental management. In that sense, aerospace technology plays an important role. This article presents a general review of environmental factors to be taken into account and should be monitored for take the better decision in the interest of preserving our ecosystem. We also discuss how the aerospace technology through different satellites, help effectively and almost in real time with this difficult task. Keywords: environment, satellites, aerospace technology, monitoring, satellite images.

scholarly journals The Features of the Use of Innovative Technologies under Modern Conditions in the Hotel and Restaurant Business

2020 ◽  
Vol 12 (515) ◽  
pp. 195-201
Author(s):  
Y. V. Kovtunenko ◽  
◽  
D. O. Olshevska ◽  
A. A. Alieksieienko ◽  
Y. O. Savkov ◽  
...  
Keyword(s):  
Working Conditions ◽  
Profit Maximization ◽  
Information Space ◽  
Direct Impact ◽  
Practical Application ◽  
Rational Use ◽  
Innovative Technologies ◽  
Business Needs

The article is aimed at defining and researching the features of the use of innovative technologies in the hotel and restaurant business. When analyzing the scientific works of certain scholars, priority innovative technologies and innovative trends were identified, as well as their use under modern conditions was considered. The relevance of the selected topic is determined by the fact that today almost every enterprise in the sphere of hotel and restaurant business needs to introduce certain innovative technologies, which is justified by sufficient demand of consumers for services of these types of business. The article provides comparative statistics on the volume of services that have been marketed in the hotel and restaurant business, which clearly indicates the need to use rationally selected innovative technologies. Also, as result of the analysis and research, specific modern innovations are identified and the need to use them is proven. The directions of their application and direct impact on the development of the hotel and restaurant business are determined. The characteristics of the innovative technologies as such are provided, as well as their rational use in specific cases is pondered. The application of certain innovative technologies, which have gained greater popularity and greater volume of involvement during the famous quarantine period, is analyzed. The essence of many innovative technologies both in the information space and in practical application in the hotel and restaurant business is researched. The preconditions for attracting innovations are improvement of working conditions, automation and robotization of many routine processes in the hotel and restaurant business. The tendency of attracting innovative technologies directly affects further, better development, profit maximization, as well as a rational reduction in costs in the hotel and restaurant business. Prospect for further scientific developments is to research the identified problems concerning the hotel and restaurant business, as well as the analysis and implementation of such innovative technologies that would help simplify the identified problems or even eliminate them thoroughly.

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