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An improved algorithm for solving the geodetic problem 5

An improved algorithm for solving the geodetic problem

引用

5th International Conference on Geoscience and Remote Sensing Mapping, ICGRSM 2023

作者： Huang, Xiaoying Yin, Dongliang Department of Operational Research and Programming Naval University of Engineering Wuhan430033 China

ISBN: (纸本)9781510672789

The preceding algorithms are troubled by the singular problem of some formulas and the azimuth multi-value problem in the solution of trigonometric equations. In this paper, sine cosine theorem for spherical triangle is applied in the Mathematica computer algebra system to address and resolve the geodetic problem at special positions such as equator, meridian circle, south and north poles. The algorithm is optimized to avoid tedious quadrant determination. On this basis, a formally simple method for solution is proposed to be applicable under all circumstances, and greatly improve the accuracy of solution. As revealed by data verification, the improved algorithm is greatly efficient in computation, symbolically simpler, and highly universal, proving its significance to the guarantee for surveying and mapping. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词： Computational efficiency

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Air Defense Deployment of Anti-reconnaissance Based on Immune Optimization Algorithm with Nested Double Particle Swarm 1st

Air Defense Deployment of Anti-reconnaissance Based on Immun...

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1st International Conference on Applied Intelligence, ICAI 2023

作者： Song, Yexin Wu, Yanjie Gao, Chunsheng Liu, Yongkai Department of Basic Courses Naval University of Engineering Wuhan China Department of Operational Research and Programming Naval University of Engineering Wuhan China

ISBN: (纸本)9789819708260

The position deployment and firepower allocation of weapons are very important in military conflict. To the anti-reconnaissance aircraft cluster problem of multi-type air defense weapons, considering the location and fire distribution of different types of air defense weapons simultaneously, a multi-objective mixed deployment model is established taking the overall effectiveness and cost of air defense as the optimization objectives. An immune optimization algorithm with nested double particle swarm is designed to solve the model. Through a series of comparative analysis of algorithm parameters and performance, the proposed algorithm is verified, and the final simulation results illustrate the feasibility and effectiveness of the model and algorithm. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Optimization

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Evaluation of target thermal infrared camouflage effect based on image similarity 2

Evaluation of target thermal infrared camouflage effect base...

引用

2nd International Conference on Mechatronics, IoT and Industrial Informatics, ICMIII 2024

作者： Lyu, Qi Li, Ling Wang, Yong Ren, Hao Cai, Zhaoyang Hao, Bentian Army Engineering University of Pla Nanjing China Naval University of Engineering Department of Operational Research and Programming Wuhan China Pla No.61606 Troop Beijing China

ISBN: (纸本)9798350386639

In order to solve the problems that the evaluation of target thermal infrared camouflage effect depends on subjective experience, weak repeatability and inefficiency, four kinds of indexes, including temperature index, texture index, Shape Index and Statistical Index, are extracted as the first-level indexes. On the basis of these four indexes, 11 sub-indexes are subdivided and extracted again as the secondary indexes, and a multi-evaluation index system is established. In view of the problem that it is difficult to determine appropriate weight weight coefficient in multi-attribute decision, a multi-index intelligent evaluation model of target thermal infrared camouflage effect based on image similarity is established by combining super-efficiency and Data envelopment analysis methods, and the super-efficiency value is calculated for ranking. This model is used to evaluate the thermal infrared camouflage effect of simulated tanks in 10 typical combat backgrounds, and the results show that the evaluation model is effective, which provides a feasible scheme and technical means for the future research of intelligent camouflage effect evaluation. © 2024 IEEE.

关键词： Data envelopment analysis

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Multi-Modal Ship Object Detection in Optical and SAR Images 2

Multi-Modal Ship Object Detection in Optical and SAR Images

引用

2nd IEEE International Conference on Image Processing and Computer Applications, ICIPCA 2024

作者： Wang, Yong Li, Ling Tan, Xiao Ji, Bing Naval University of Engineering Department of Operational Research and Programming Wuhan China Engineering College of Field Engineering The Army Engineering University of Pla Nanjing China Naval University of Engineering Department of Navigation Wuhan China

ISBN: (数字)9798350360240

ISBN: (纸本)9798350360240

Ship object detection is one of the key technologies in the fields of maritime traffic monitoring, maintenance of maritime rights and interests, and coastal defense early warning detection. Optical remote sensing data contains rich texture information, which is conducive to target recognition, but it is highly depends on light and can only be used during the day. The influence of light on synthetic aperture radar (SAR) data is negligible, so it can be used all-weather, but it is difficult to accurately distinguish ship targets due to the lack of texture information. In order to comprehensively utilize two different data and fully leverage their respective advantages, a multimodal ship object rotated detection algorithm is proposed. Feature extraction is conducted separately for optical and SAR data, and an intermediate fusion strategy is adopted to achieve the fusion and detection of optical and SAR features. The introduction of CBAM (Convolutional Block Attention Module) in the backbone facilitates automatic identification of the weight of each feature channel during the learning process, which enhances the effect of feature extraction and suppresses noise and irrelevant information. The proposed multimodal detection algorithm has been validated on the constructed QXS-SAROPT-SHIP dataset. Compared with typical horizontal bounding box detection and single-modal detection algorithms, the accuracy rate of the proposed multimodal detection algorithm has been significantly improved. Specifically, the accuracy of the multimodal detection algorithm with CBAM module has been increased by 1.73%, demonstrating the effectiveness of the proposed method. © 2024 IEEE.

关键词： Optical remote sensing

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Application of Intelligent Algorithm to Ill-Conditioned Matrix Correction in RFM Location Solution 5

Application of Intelligent Algorithm to Ill-Conditioned Matr...

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5th International Conference on Industrial IoT, Big Data and Supply Chain, IIoTBDSC 2024

作者： Tan, Xiao Ji, Bing Gao, Yang Bian, Shaofeng Department of Operational Research and Programming Naval University of Engineering Wuhan430033 China College of Electrical Engineering Naval University of Engineering Wuhan430033 China College of Naval Architecture and Ocean Engineering Naval University of Engineering Wuhan430033 China

ISBN: (纸本)9798331539818

The purpose of this study is to explore the application of intelligent algorithm to the ill-conditioned matrix correction in RFM (rotational feedback mechanism) positioning solution. By using intelligent algorithm, fault diagnosis, process monitoring and matrix optimization, an innovative RFM location solution system is proposed to improve the accuracy and reliability of location solution. Intelligent algorithm is used to learn the data in RFM positioning solution through training model, so as to realize the effective correction of ill-conditioned matrix and improve the positioning accuracy. By analyzing the data of RFM location solution, the fault diagnosis method is used to realize the early detection and diagnosis. Process monitoring operation data of RFM positioning solution to realize real-time monitoring of positioning solution process. Finally, the ill-conditioned matrix is corrected by using matrix optimization method, which provides an effective solution for RFM localization. © 2024 IEEE.

关键词： Collaborative filtering

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research on an Anechoic Wind Tunnel in the Design Phase by Numerical Simulation 3

Research on an Anechoic Wind Tunnel in the Design Phase by N...

引用

3rd International Conference on Modeling, Simulation, Optimization and Algorithm, ICMSOA 2021

作者： Li, Hanqin Fang, Bin Zhang, Yongming Department of Operational Research and Programming Naval University of Engineering Hubei Wuhan China Department of Naval Architecture and Marine Engineering Naval University of Engineering Hubei Wuhan China

As an important facility for acoustic measurement and research in air medium, anechoic wind tunnel requires high acoustic performance. In this paper, the flow field and acoustic characteristics of anechoic wind tunnel were studied by modeling and simulation. The velocity and pressure distribution of the whole flow field in the wind tunnel are obtained by simulation calculation, and the noise source distribution in the anechoic wind tunnel is studied by the broadband noise source method, which provides a reference for the design, construction and optimization of the anechoic wind tunnel. © Published under licence by IOP Publishing Ltd.

关键词： Numerical methods

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research on acoustic transfer performance of power cabin of underwater craft 4

Research on acoustic transfer performance of power cabin of ...

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2021 4th International Conference on Applied Mathematics, Modeling and Simulation, AMMS 2021

作者： Li, Hanqin Fang, Bin Zhang, Yongming Department of Operational Research and Programming Naval University of Engineering China Department of Naval Architecture and Marine Engineering Naval University of Engineering China

In order to study the acoustic performance of underwater vehicle including vibration and noise, two kinds of structure models of an underwater craft cabin in the air medium and in the water medium were analyzed separately by finite element method. Through modal analysis, the impedance ratios of the two kinds of models were calculated. The influence of the thickness of the pressure hull on the impedance ratio of the structure was studied, and the acoustic transfer performance was analyzed and compared between the two kinds of models. © Journal of Physics: Conference Series 2021.

关键词： Finite element method

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Evaluation of target thermal infrared camouflage effect based on image similarity

Evaluation of target thermal infrared camouflage effect base...

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Mechatronics, IoT and Industrial Informatics (ICMIII), International Conference on

作者： Qi Lyu Ling Li Yong Wang Hao Ren Zhaoyang Cai Bentian Hao Army Engineering University of PLA Nanjing China Department of Operational Research and Programming Naval University of Engineering Wuhan China PLA No.61606 Troop Beijing China

ISBN: (数字)9798350386639

ISBN: (纸本)9798350386646

关键词： Temperature distribution Temperature dependence Mechatronics Shape Evaluation models Thermal analysis Indexes

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Application of Intelligent Algorithm to Ill-Conditioned Matrix Correction in RFM Location Solution

Application of Intelligent Algorithm to Ill-Conditioned Matr...

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Industrial IoT, Big Data and Supply Chain (IIoTBDSC), International Conference on

作者： Xiao Tan Bing Ji Yang Gao Shaofeng Bian Department of Operational Research and Programming Naval University of Engineering Wuhan China College of Electrical Engineering Naval University of Engineering Wuhan China College of Naval Architecture and Ocean Engineering Naval University of Engineering Wuhan China

ISBN: (数字)9798331539818

ISBN: (纸本)9798331539825

关键词： Fault diagnosis Process monitoring Training Visualization Accuracy Supply chains Optimization methods Real-time systems Data models Maintenance

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research on the Application of Smoke Device Multi-Mode Configuration Model

Research on the Application of Smoke Device Multi-Mode Confi...

引用

Machine Learning and Intelligent Systems Engineering (MLISE), International Conference on

作者： Kailong Yang Ling Li Yong Wang Qing Liu Engineering College of Field Engineering Army Engineering University of PLA Nanjing China Department of Operational Research and Programming Naval University of Engineering Wuhan China Graduate School Army Engineering University of PLA Nanjing China

ISBN: (数字)9798350375077

ISBN: (纸本)9798350375084

Aiming at the problems existing in the configuration and use of current smoke devices, focusing on the actual task characteristics and support requirements, a systematic analysis process is established through the application research of multi-mode configuration model, it is the basis of successfully carrying out the task of smoke screen protection. In the comprehensive consideration of the influence factors in the process of smoke device configuration, the use of multi-modal configuration model, through the analysis of the mission terrain, weather, target type and other key factors, the configuration method based on line, area and ring is determined, and the limitation of maneuvering under the influence of terrain and the situation of using in the multi-mode configuration is further analyzed, and the usage mode based on fixed and moving is determined, according to the concrete task and the setting of the parameters of the smoke device, the accurate control of the consumption and the actual configuration of the smoke device can be realized according to the analysis results, the applicability and accuracy of the model in the actual situation are preliminary checked, which has high practical application value.

关键词： Analytical models Adaptation models Accuracy Systematics Process control Focusing Machine learning

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