In this paper, a comparison between feature extraction methods (Radon Cosine Method, Canny Contour Method, Fourier Transform, SIFT descriptor, and Hough Lines Method) and Convolutional Neural Networks (proposed CNN and pre-trained AlexNet) is presented. For the evaluation of these methods, depth maps were used. The tested data were obtained by Microsoft Kinect camera (IR depth sensor). The feature vectors were classified by the Support Vector Machine (SVM). The confusion matrix for the evaluation of experimental results was used. The row of confusion matrix represents target class of tested data and the column represents predicted class. From the experimental results, it is evident that the best results were achieved by proposed CNN (97.4%). On the other hand, the pre-trained AlexNet scored 93.7%.
{"title":"Comparison of Neural Networks with Feature Extraction Methods for Depth Map Classification","authors":"Sykora, Kamencay, Hudec, Benco, Sinko","doi":"10.3849/aimt.01326","DOIUrl":"https://doi.org/10.3849/aimt.01326","url":null,"abstract":"In this paper, a comparison between feature extraction methods (Radon Cosine Method, Canny Contour Method, Fourier Transform, SIFT descriptor, and Hough Lines Method) and Convolutional Neural Networks (proposed CNN and pre-trained AlexNet) is presented. For the evaluation of these methods, depth maps were used. The tested data were obtained by Microsoft Kinect camera (IR depth sensor). The feature vectors were classified by the Support Vector Machine (SVM). The confusion matrix for the evaluation of experimental results was used. The row of confusion matrix represents target class of tested data and the column represents predicted class. From the experimental results, it is evident that the best results were achieved by proposed CNN (97.4%). On the other hand, the pre-trained AlexNet scored 93.7%.","PeriodicalId":39125,"journal":{"name":"Advances in Military Technology","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70004492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Scintillators belong to the oldest types of radiation detectors. Nowadays, for spectrometric purposes the use of semiconductive detectors is more common, but scintillation detectors are still in use for various specific measurement purposes. We have investigated the dependence of a gamma spectrum measured by NaI(Tl) scintillation detector on temperature changes. We examined the need of energy or efficiency recalibration and software compensation. Due to temperature dependence, scintillation detectors require energy recalibration before environmental and outdoor measurements or before the use of etalon sources for obtaining spectrum for follow-up calibration. We have elaborated on a simple method for energy recalibration of scintillation detectors at different temperatures. This method was converted into an algorithm and it can be either burned into instrument EPROM or used in software processing.
{"title":"Temperature Dependence of NaI(Tl) Radiation Scintillation Detectors’ Characteristics","authors":"Csurgai, Padányi, Földi","doi":"10.3849/aimt.01328","DOIUrl":"https://doi.org/10.3849/aimt.01328","url":null,"abstract":"Scintillators belong to the oldest types of radiation detectors. Nowadays, for spectrometric purposes the use of semiconductive detectors is more common, but scintillation detectors are still in use for various specific measurement purposes. We have investigated the dependence of a gamma spectrum measured by NaI(Tl) scintillation detector on temperature changes. We examined the need of energy or efficiency recalibration and software compensation. Due to temperature dependence, scintillation detectors require energy recalibration before environmental and outdoor measurements or before the use of etalon sources for obtaining spectrum for follow-up calibration. We have elaborated on a simple method for energy recalibration of scintillation detectors at different temperatures. This method was converted into an algorithm and it can be either burned into instrument EPROM or used in software processing.","PeriodicalId":39125,"journal":{"name":"Advances in Military Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42956556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The paper presents the mathematical model of the localization of electromagnetic sources in near-field region based on the sources localization mathematical model valid for the far-field region. The aim of the article is to show similarities and differences between both models with a deeper focus on near-field region model analysis using planar equidistant sensors array. Although both concepts in a high-level mathematical description apparatus look very much the same, in details the near-field region model reconstruction process is more complex with different constrains. Detailed covariance matrix analysis and statistics of the covariance matrix represents the main part of the article. In the conclusion, paper shows some model verification results for the localization of single source, correlated sources and coherent sources.
{"title":"The Covariance Matrix Analysis and Statistics for Near-field Sources Localization Model","authors":"Nebus, Gažovová","doi":"10.3849/aimt.01329","DOIUrl":"https://doi.org/10.3849/aimt.01329","url":null,"abstract":"The paper presents the mathematical model of the localization of electromagnetic sources in near-field region based on the sources localization mathematical model valid for the far-field region. The aim of the article is to show similarities and differences between both models with a deeper focus on near-field region model analysis using planar equidistant sensors array. Although both concepts in a high-level mathematical description apparatus look very much the same, in details the near-field region model reconstruction process is more complex with different constrains. Detailed covariance matrix analysis and statistics of the covariance matrix represents the main part of the article. In the conclusion, paper shows some model verification results for the localization of single source, correlated sources and coherent sources.","PeriodicalId":39125,"journal":{"name":"Advances in Military Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47372579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
There is a perceptible scepticism around armed robot in combat units – the question whether to use it or not. The EOD robots (EOD – Explosive Ordnance Disposal) won their way to war theatre already, but other support assets on UGV platforms (UGV – Unmanned Ground Vehicles) need to be trusted in future, too. One of the reasons for distrust could be a discussion gap between researchers and infantry units on the lowest tactical level. The article tries to set simple demands throughout infantryman-eyes perspective and it outlines needs for the UGV in the mechanized / infantry units in a first part. The second part outlines basic technical and tactical specification as a challenging list for development teams. Finally, the third part proposes two notional AAR (After Action Report) reports of units using UGV for support. The article sets basic questions of themes as the autonomy and controls of UGVs and UGV in ISTAR systems (ISTAR – Intelligence Surveillance Target Acquisition Reconnaissance).
{"title":"Robot as a Member of Combat Unit A Utopia or Reality for Ground Forces?","authors":"Matejka","doi":"10.3849/aimt.01332","DOIUrl":"https://doi.org/10.3849/aimt.01332","url":null,"abstract":"There is a perceptible scepticism around armed robot in combat units – the question whether to use it or not. The EOD robots (EOD – Explosive Ordnance Disposal) won their way to war theatre already, but other support assets on UGV platforms (UGV – Unmanned Ground Vehicles) need to be trusted in future, too. One of the reasons for distrust could be a discussion gap between researchers and infantry units on the lowest tactical level. The article tries to set simple demands throughout infantryman-eyes perspective and it outlines needs for the UGV in the mechanized / infantry units in a first part. The second part outlines basic technical and tactical specification as a challenging list for development teams. Finally, the third part proposes two notional AAR (After Action Report) reports of units using UGV for support. The article sets basic questions of themes as the autonomy and controls of UGVs and UGV in ISTAR systems (ISTAR – Intelligence Surveillance Target Acquisition Reconnaissance).","PeriodicalId":39125,"journal":{"name":"Advances in Military Technology","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42177617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The article deals with the problem of determining the number of antiaircraft missile systems of various types in grouping of Air Defense troops for the purpose of providing the required effectiveness of repelling the enemy air strikes on the objects and troops. The methodology of justification of ratio of different types of antiaircraft missile systems in the grouping of Air Defense troops using Lagrange’s method of undetermined multipliers has been developed. This technique allows justifying a set of types of antiaircraft missile systems which will provide maximum effectiveness of the employment of grouping of Air Defense troops. This approach can also be used to justify the composition of mixed military formations of Air Defense.
{"title":"Justification of the Optimal Composition of the Air Defense Troops Grouping","authors":"O. Zahorka, I. Zahorka, Polishchuk","doi":"10.3849/aimt.01303","DOIUrl":"https://doi.org/10.3849/aimt.01303","url":null,"abstract":"The article deals with the problem of determining the number of antiaircraft missile systems of various types in grouping of Air Defense troops for the purpose of providing the required effectiveness of repelling the enemy air strikes on the objects and troops. The methodology of justification of ratio of different types of antiaircraft missile systems in the grouping of Air Defense troops using Lagrange’s method of undetermined multipliers has been developed. This technique allows justifying a set of types of antiaircraft missile systems which will provide maximum effectiveness of the employment of grouping of Air Defense troops. This approach can also be used to justify the composition of mixed military formations of Air Defense.","PeriodicalId":39125,"journal":{"name":"Advances in Military Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45921517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The paper describes a computational reconstruction of an anti-aircraft artillery firing scenario and its use in analysing firing data. Computational reconstruction supported by 3D visualization can be a useful tool for evaluating soldiers’ training. A system for collecting, analysing and visualising the results of anti-aircraft artillery firing is described. The information collected can then be re-used to evaluate the effectiveness of soldiers’ training, and to make an optimal use of the available data. Particular attention is paid to the solution of the problem of restoring the trajectory of the target and the projectiles, and to their synchronisation in time.
{"title":"Computational Reconstruction of an Anti-Aircraft Artillery Firing Scenario","authors":"Bużantowicz, Rodzik","doi":"10.3849/aimt.01361","DOIUrl":"https://doi.org/10.3849/aimt.01361","url":null,"abstract":"The paper describes a computational reconstruction of an anti-aircraft artillery firing scenario and its use in analysing firing data. Computational reconstruction supported by 3D visualization can be a useful tool for evaluating soldiers’ training. A system for collecting, analysing and visualising the results of anti-aircraft artillery firing is described. The information collected can then be re-used to evaluate the effectiveness of soldiers’ training, and to make an optimal use of the available data. Particular attention is paid to the solution of the problem of restoring the trajectory of the target and the projectiles, and to their synchronisation in time.","PeriodicalId":39125,"journal":{"name":"Advances in Military Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47453063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Air Traffic Control (ATC) unit responsibilities during the traffic control start with the finalisation of the handover procedures and they finish by passing these responsibilities to following Air Traffic Services. So called Hand/Take over procedures. These activities could be assure by the Electronic handover/takeover device or manually. While inside the civilian ATC environment, there are precise working positions of planning controllers, who are responsible for the preparation of flight planning and all information for Executive Controller, inside the military ATC facilities, the Executive controller will prepare and provide all activities him/herself. Our research on this domain focuses on Workload analysis and a new approach to dynamic Workload SW products available for the military ATC Environment.
{"title":"Workload Features inside Air Traffic Control Electronic Transfer Environment","authors":"Bauer, Kalvoda","doi":"10.3849/aimt.01356","DOIUrl":"https://doi.org/10.3849/aimt.01356","url":null,"abstract":"Air Traffic Control (ATC) unit responsibilities during the traffic control start with the finalisation of the handover procedures and they finish by passing these responsibilities to following Air Traffic Services. So called Hand/Take over procedures. These activities could be assure by the Electronic handover/takeover device or manually. While inside the civilian ATC environment, there are precise working positions of planning controllers, who are responsible for the preparation of flight planning and all information for Executive Controller, inside the military ATC facilities, the Executive controller will prepare and provide all activities him/herself. Our research on this domain focuses on Workload analysis and a new approach to dynamic Workload SW products available for the military ATC Environment.","PeriodicalId":39125,"journal":{"name":"Advances in Military Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46929689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The article deals with the application of PVD (Physical Vapour Deposition) coatings onto the surface of compressor blades. In sandy or dusty conditions, compressor blades are the first obstacle for particles which are being sucked into the jet engine. Compressor blades equipped with a protective layer should have greater resistance against erosive and abrasive damage. To support this theory, an empirical experiment had to be conducted. Based on the data acquired from the experiment, we were able to summarise the effectiveness of coatings applied.
{"title":"Analysis of the Impact of Hard PVD Coatings on the Abrasion Resistance of the Compressor Blades","authors":"Fördös, Čerňan","doi":"10.3849/aimt.01333","DOIUrl":"https://doi.org/10.3849/aimt.01333","url":null,"abstract":"The article deals with the application of PVD (Physical Vapour Deposition) coatings onto the surface of compressor blades. In sandy or dusty conditions, compressor blades are the first obstacle for particles which are being sucked into the jet engine. Compressor blades equipped with a protective layer should have greater resistance against erosive and abrasive damage. To support this theory, an empirical experiment had to be conducted. Based on the data acquired from the experiment, we were able to summarise the effectiveness of coatings applied.","PeriodicalId":39125,"journal":{"name":"Advances in Military Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43718175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
: The paper deals with an adaptation of the standard interior ballistics model for the case of amphibious rifle shooting ammunition under water. The adapted mathematical model was validated and experimentally verified using the 5.56 mm underwater projectile shot from the 5.56 mm amphibious rifle. The dependence of the underwater interior ballistic processes on the powder mass was investigated. The results of theoretical mathematic model solution correspond very well with experiment. The described mathematical model and the dependence of the underwater interior ballistic processes on the powder mass can be a reference for designers in the design process of the underwater ammunition or underwater rifle.
{"title":"Interior Ballistics of Amphibious Rifle when Firing under Water","authors":"Konečný, Dao, Nguyen, Le","doi":"10.3849/aimt.01327","DOIUrl":"https://doi.org/10.3849/aimt.01327","url":null,"abstract":": The paper deals with an adaptation of the standard interior ballistics model for the case of amphibious rifle shooting ammunition under water. The adapted mathematical model was validated and experimentally verified using the 5.56 mm underwater projectile shot from the 5.56 mm amphibious rifle. The dependence of the underwater interior ballistic processes on the powder mass was investigated. The results of theoretical mathematic model solution correspond very well with experiment. The described mathematical model and the dependence of the underwater interior ballistic processes on the powder mass can be a reference for designers in the design process of the underwater ammunition or underwater rifle.","PeriodicalId":39125,"journal":{"name":"Advances in Military Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41933989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Software-defined networks of a large dimension have a complex and branched structure; they are inherent in them by continuous expansion and dynamic characteristics, which significantly limits the application of known methods for their modelling and optimization. Consequently, the problems of the analysis of next-generation networks at the system level and the study of their new features, mainly due to large size and complex geometry (topology), are relevant. The tasks of constructing optimal structures of complex networks are solved by means of the theory of hierarchical systems, which is widely used to describe network structures, in particular, flow control networks. The work is devoted to the load balancing in SDN depending on their topological hierarchical structure and type of traffic (vertical, horizontal, and hybrid).
{"title":"Estimating the Overhead of Flow Control in Hierarchical Software-Defined Networks","authors":"Vorotnikov","doi":"10.3849/aimt.01351","DOIUrl":"https://doi.org/10.3849/aimt.01351","url":null,"abstract":"Software-defined networks of a large dimension have a complex and branched structure; they are inherent in them by continuous expansion and dynamic characteristics, which significantly limits the application of known methods for their modelling and optimization. Consequently, the problems of the analysis of next-generation networks at the system level and the study of their new features, mainly due to large size and complex geometry (topology), are relevant. The tasks of constructing optimal structures of complex networks are solved by means of the theory of hierarchical systems, which is widely used to describe network structures, in particular, flow control networks. The work is devoted to the load balancing in SDN depending on their topological hierarchical structure and type of traffic (vertical, horizontal, and hybrid).","PeriodicalId":39125,"journal":{"name":"Advances in Military Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43536132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：