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Dissertations / Theses on the topic 'Machine guns'
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1
Olsson, Johan. "A Client-Server Solution for Detecting Guns in School Environment using Deep Learning Techniques." Thesis, Linköpings universitet, Medie- och Informationsteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-162476.
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With the progress of deep learning methods the last couple of years, object detection related tasks are improving rapidly. Using object detection for detecting guns in schools remove the need for human supervision and hopefully reduces police response time. This paper investigates how a gun detection system can be built by reading frames locally and using a server for detection. The detector is based on a pre-trained SSD model and through transfer learning is taught to recognize guns. The detector obtained an Average Precision of 51.1% and the server response time for a frame of size 1920 x 1080 was 480 ms, but could be scaled down to 240 x 135 to reach 210 ms, without affecting the accuracy. A non-gun class was implemented to reduce the number of false positives and on a set of 300 images containing 165 guns, the number of false positives dropped from 21 to 11.
2
McPherson, Glenn R. "Prime Vendor Support (PVS) for the Avenger M3P .50 caliber machine gun system." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2002. http://library.nps.navy.mil/uhtbin/hyperion-image/02Dec%5FMcPherson.pdf.
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Thesis (M.S. in Program Management)--Naval Postgraduate School, December 2002.<br>Thesis advisor(s): Michael W. Boudreau, Robert D. Overbeek. Includes bibliographical references (p. 51-52). Also available online.
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Spencer, Brett. "“Casey Saw It Through”: Guy “Machine Gun” Molony and the Creation of a Rugged Individual." ScholarWorks@UNO, 2016. http://scholarworks.uno.edu/td/2219.
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Abstract
This thesis explores the influence of masculinity in twentieth century American foreign policy through examining the career of Guy “Machine Gun” Molony. Molony was an Irish American mercenary from New Orleans, whose career saw the transformation of Honduras from a banana republic to a recipient of dollar diplomacy. Unlike the majority of mercenaries who did not use their experience to build successful careers, Molony made a name for himself in American newspapers, becoming respected and even feared by policemen and politicians. His life tells a fascinating tale of the individual male in American foreign policy, where rebellious youth used war and instability to create heroic images of themselves. This thesis argues that the U.S. State Department borrowed from the independent mercenary model, building on a foundation laid out by men like Molony to implement dollar diplomacy. Guy Molony’s career is a telling example of how perceived ideas of manhood carried imperial intentions during the era of manifest destiny and the Monroe Doctrine. Although scholars tend to focus on Western expansion when examining the ideology of manifest destiny, this thesis explores how mercenaries like Guy Molony, followed by the U.S. State Department, continued to look southward to Central America as a means for American expansion.
4
Karayumak, Turker. "Modeling And Stabilization Control Of A Main Battle Tank." Phd thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613767/index.pdf.
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In this study, a parametric model for a main battle tank electric gun turret drive system
stabilization controller has been developed. Main scope was the study of the muzzle deviation
due to barrel flexibility. Traverse and elevation dynamics has been modeled to include the
drive-line and barrel flexibilities. Order of the models has been kept large enough to cover the
frequencies dominant in the interest scope but at the same time low enough to create a
parametric model which can be used in real-time fire control computers. Therefore a 5-dof
elevation and a 7-dof traverse models have been implemented. These models have been used
to design a classical feedback and feedforward controllers which performed good enough to
meet 0.5mrad stabilization accuracies.
After satisfactory results have been obtained from the stabilization controller, a special
coincidence algorithm has been implemented by time-series analysis of the disturbance signal
which is constantly being measured by the feedforward gyro. Necessity of predicting the
future muzzle angular orientation due to the latency in fire is discussed and by using
autoregressive modeling of the disturbance signal, future values of the disturbance signal has
been entered into the observer model. The prediction horizon has been set to the time delay
value between the trigger is pulled by the gunner and the ammunition exit from the muzzle.
By checking the future coincidence within a very narrow windowing (0.05mrad) a 100% first
round hit probability in theory has been achieved. This is assured since the coincidence
inhibited the fire signals which were to miss the aiming point with a large error.
5
Stuchlík, David. "Detekce a rozpoznání zbraně ve scéně." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2020. http://www.nusl.cz/ntk/nusl-417216.
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The aim of the diploma thesis is to design an algorithm for detection and recognition of the type of gun in the image. Firstly, the existing methods and techniques for detecting the various objects are briefly introduced in the text of the thesis however, the methods are primarily focused on guns. Next, the basics of neural networks are briefly outlined, followed by an overview of the most common detectors for deep neural networks. The second half of the thesis is devoted to the implementation of an application for generating images based on a 3D model of a gun, the creation of a data file and learning of a neural network. Finally, the results obtained, which clearly indicate that in order to cover a huge variation of real weapons, is necessary to generate a large amount of training data based on many different 3D models, are briefly summarized in the conclusion of the thesis.
6
Meyer, Luciano Augusto. "Esquizofrenia pós-soviética: sonhos, vazio e identidade em A metralhadora de Argila." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/8/8155/tde-07122018-120841/.
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Notadamente um dos escritores russos mais bem-sucedidos na decada de 1990, Victor Pelevin se caracteriza por uma obra pouco convencional no que concerne a construção de personagens e mundos em que elas habitam. A transicão poltica e cultural ocorrida após a queda do governo soviético, em 1991, e um dos fatores que influenciam as obras de grande parte dos autores pós-modernos na Rússia; entretanto, o sucesso de Pelevin se deve também as peculiaridades de sua escrita que, em vez de apenas promover críticas a sociedade que o precedeu, também inclui reflexões filosóficas e metafisicas por vezes consideradas pretensiosas demais pela critica que abordam essa transição. Em A metralhadora de argila, romance de 1996, o autor remonta as batalhas da Guerra Civil Russa, em 1919, colocando-as como um mundo paralelo a uma instituição psiquiátrica em 1991. O interesse, então, e estudar o processo de recriação que Pelevin faz da realidade pré-soviética e como ele a compara ao periodo pos-sovietico, apontando aspectos no romance que identifiquem a nocao de identidade e a mudanca a que este conceito esta sujeito apos as transformacoes sociais nesses periodos da historia recente da Russia.<br>One of the most renowned Russian writers of the 1990s, Viktor Pelevi distinguishes himself for the construction of characters and worlds in which they inhabit. The political and cultural transition after the end of the Soviet government, in 1991, is one of the factors that have an effect on most of the literary works from Post-Modern authors in Russia; although, Pelevin\'s success as well is due to singularities in his writing, which instead of only criticise the Soviet society before him, also includes philosophical and metaphysical thoughts sometimes viewed as too pretentious by the critics that discuss the transition. In The clay machine-gun, a 1996 novel, Pelevin remembers the battles of the Russian Civil War, in 1919, putting them as a parallel world within a madhouse in 1991. So, the interest in this study is to understand Pelevin\'s recreation of the Pre-Soviet reality and how he compares it to the Post- Soviet period, highlighting elements on the novel that trace the notion of identity and the adjustment it takes after the social transformation in these both recente Russian times.
7
Randall, Mark. "Reflections of war: changes in tactics and technology in the diaries and memoirs of Canadian soldiers 1916-1918." Thesis, 2008. http://hdl.handle.net/1828/915.
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The Great War was in many ways a conflict defined by technology. The rapid advancements in technology over the decades leading up to 1914 coupled with the outdated tactics employed by all sides created the stalemate of Trench Warfare. Improvements to the existing technology, the addition of new technology, as well as an evolution in tactics led to the breakout, and eventual Allied victory, of 1918. These changes in tactics and technology significantly affected the lives of frontline soldiers.
This thesis asks if the tactical and technological changes, in the final two years of the war, were reflected in diaries and memoirs of Canadian soldiers serving at the front. The diaries and memoirs of the soldiers do reflect many of the changes found in the secondary sources. Surprisingly, however, the primary sources often provide more detail about how these weapons were employed by the Germans. Unless the soldier in question was directly involved in their use, or was witnessing a spectacular event, accounts of Canadian artillery, machine gun and poison gas use are often short and lacking in detail.
8
Yu, Chia-Ching, and 余家慶. "Structural Dynamic Simulation of Machine Gun Mount." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/02373658388317045478.
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碩士<br>國立屏東科技大學<br>車輛工程系所<br>104<br>The purpose of this research is to investigate the structure stiffness and strength of machine gun mount under dynamic load by using finite element method. The finite element model (FEM) is established by using commercial code HyperWorks. The material properties of machine gun mount are obtained from tensile test. The weight and center of gravity are measured by expirement to validate FEM. Experimental modal analysis (EMA) is conducted on the body structure to obtain the natural frequencies and mode shapes, which are used to validate the FEM. Good correlation between analysis and test ensures the FEM is equivalent to the actual structure of machine gun mount. Dynamic analysis is performed to simulation the structure dynamic response of machine gun mount under shooting by using commercial code LS-DYNA. Use SigLab and accelerameter to measure acceleration response of machine gun mount, which is obtained from experiment of machine gun shooting test. The correlation between experiment and simulation is relevant. The maximum von Mises stress is located on the position closed to bolt, but the yielding ratio is lower than 20 %. Furthermore, the structure deformations are lower than 0.3 mm. Therefore, we can conclude that the machine gun mount structure is well designed in stiffness and strength.
9
Wang, Weng-Hong, and 王文宏. "The reliability analysis of The 20 mm twin machine gun." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/72025479192583682737.
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碩士<br>國防大學中正理工學院<br>兵器系統工程研究所<br>89<br>The 20 mm twin machine gun is one of the low-altitude airspace defensive systems, it is also a major weapon system, which is developed by the Combined Service Forces recently. This research provide a reliability analysis for the purpose of to understand how the 20 mm twin machine gun was used in an open field or troops after dilivery.
This thesis construct a comprehensive and concise model for quantitative processing and analysis, which provide an easy-to-follow procedure for the logistic staff. This research also enable the logistic staff to understand the entire process of generating, organizing, and analyzing of data. Consequently, the data processing procedure will lead to conclusions for finding out the possible causes, for example, inappropriate design or poor manufacturing technique, which are the dominate factors to cause product malfunction. Another consideration is the data processing procedure, it is important for the detection of the weakness of products. Based on these point of view, product quality can be enhanced, usage time will be extended and efficiency can be improved. This research can be of contributions for logistic supporting of the R.O.C.’s military force.
10
Sun, Shih-Yu, and 孫詩雨. "The Analyze of Dynamic Simulation of T-74 Machine Gun." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/17611698765683266371.
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碩士<br>國防大學理工學院<br>兵器系統工程碩士班<br>100<br>The main purpose of this dissertation is through the simulation software ADAMS (Automatic Dynamic Analysis of Mechanical System) to simulate and analyze the dynamic behaviors of T-74 machine gun which is equipped in the R.O.C Army Force. The ADAMS is developed by the MDI (Mechanical Dynamics,Inc.) and is the most popular simulation tool in the CAE (Computer Aided Engineering) by its simulation technology. The ADAMS can establish complicated mechanical system, simulate all kinds of dynamic in real situation, analyze and compare all kinds of designed states to get the best solution. Therefore, we can reduce the cost of R&D and improve the quality of products.
The gun model is created by SolidWorks software. The model is imported the model into the ADAMS and set the parameter to start the simulation to complete the dynamic simulation and research to improve the capability of small arm design.
11
Kang, Chih-Wei, and 康智為. "The Analyze Of Dynamic Simulation Of .50 Caliber Machine Gun." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/98221706974834385636.
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碩士<br>國防大學理工學院<br>兵器系統工程碩士班<br>100<br>The main purpose of this dissertation is to analyze the structure dynamic of small arm. Simulate and analyze the dynamic of T-90 50 caliber by the ADAMS software. Build the parts by the SolidWorks software and calculate the parameter by the Vallier-Heydenreich interior ballistic method. Compute the recoil force by the experience function then import the parameter into the ADAMS to set the relationship of contact, friction etc.and all the limitation condition. The constant K of spring which was provided by the produce arsenal 205.
The result of research can establish the initial research capability of structure dynamic of heavy machine gun and improve the 3D database to provide as reference in the future research.
12
Hsieh, Hsin-Fu, and 謝欣甫. "Dynamic Simulation of Feed Mechanism of the T74 Machine Gun." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/5m8g2a.
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碩士<br>國防大學理工學院<br>兵器系統工程碩士班<br>106<br>This research analyzes the motion of feed mechanism of the machine gun by 3D CAD models and dynamic simulation software. In this study, the T74 machine gun was used as an example. All parts were created and assembled by Solidworks, then transferred into ADAMS dynamic simulation software to analyze the movement of the mechanism. The action of the gun feed mechanism and performance parameters were observed, including the fire rate, muzzle velocity, the velocity and acceleration of the ammunition, transmission ratio and other important parameters. The results shows that the fire rate is moderate, and the feed mechanism can stably perform the feeding function, which is close to the actual gun performance. The results of this research can be used to improve the performance of the T74 machine gun and the future design of the new machine gun .
13
丁振嘉. "Development of a Low-Pressure Gun for Electrical-Shooting Game Machine." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/02747907522329328823.
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碩士<br>國立彰化師範大學<br>電機工程學系<br>102<br>ABSTRACT
Ministry of Economic planning in Taiwan is expected to industrial
development goals game content related output value reached NT $ 370 billion in
2006, and the government relax laws on the establishment of such industry in the
development and management can be more smoothly, and wishing Taiwan
entertainment content design, as well as the development, production to become
global Chinese as the goal.
Shooting game in market, most the traditional paintball gun/BB gun shooting
paper targets or signal sent by the electron gun hit the rear screen. The former
operation requires the use of physical bullets, and consume a lot of bullets also
cause environmental issues. In addition, the user needs to add their own in the
process bullets cause the user convenience of use is low, also led guns difficult to
manage. The latter without bullets loss and feeding but require screen, and
relatively high cost. In addition, there is no sense of reality and force. Therefore,
this paper proposes a novel electron gun shooting game combination of
low-pressure gun that allows users to have a better quality of the game. In this
paper, use the firearms firing bullets by safe low-pressure gun , both the presence
and force. In addition, the machine has recovered a bullet and automatic
replenishment mechanism, to avoid environmental problems but also indirectly
reduce management costs.
Keywords: Games, shooting games, low-pressure gun.
14
Hwang, Chen-Kuo, and 黃振國. "Intelligent tracking fire control system of dual-axis motor machine gun." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/94435708817487992652.
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碩士<br>國立臺灣大學<br>電機工程研究所<br>84<br>The 20mm machine gun is an all-purpose short-haul gun capable
of producing continuous rounds at a high firing rate. Based on
our knowledge of these features, the present thesis has the
intention to build a practicable firing control system,
integrating target information from the image system. Because
the image system can only extract target-point information, the
firing control system contains three Kalman-Filter to observe
target status (velocity and acceleration in X-, Y-, Z-
direction). The thesis also a lead-correction method, which can
be used to predict target tion, and develops a fuzzy controller
for good fire timing. we give two methods for designing shot-
point distribution, in to enhance the hitting rate. At the end
of this thesis, we set up some hypotheses to appraise the
performance of the firing control system. On the whole, this
esis proposes a practicable firing control system and a
environment for further development.
15
Tsai, Ming-Chieh, and 蔡明杰. "The Research of Composite Material Lightweight Barrel for 50 Caliber Machine Gun." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/cyaps6.
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碩士<br>國防大學理工學院<br>兵器系統工程碩士班<br>105<br>The research is the design, simulation, and analysis of composite material lightweight barrel of 50 caliber machine gun. First of all, set up the 3D finite element model and simulate the interior ballistic movement by nonlinear finite element analysis. The muzzle velocity is similar to reference value to prove the research is believable. Consequently, design the chord-rifling barrel and composite material barrel models. The spin velocity is almost the same as reference value, as well as the muzzle velocity. The design of composite material barrel is feasibility. Finally, analyze the stress distribution of composite material barrel and compare the weight of composite material barrel with original one. Selecting any elements of composite material barrel in frontal, medium, and rear parts. The hoop stress, axial stress, and shear stress are smaller than reference values and the weight of composite material barrel is only 19％ of original one. Verify the specification of lightweight and high stiffness of composite material barrel.
The research success in the interior ballistic movement of the origin, chord, and composite materials models. All the data can provide the military arsenals to develop, design, modify, and manufacture the lightweight materials barrel for 50 caliber machine gun. We anticipate the research will reduce the development of the composite materials barrel for 50 CMG on schedule and cost.
16
Chih-Wen, Liu, and 劉志文. "Design of Robustly Stable Servo Control Systems for Dual- Axis Motor Driven Machine Gun Turret." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/08894509230985234176.
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碩士<br>國立臺灣大學<br>電機工程研究所<br>84<br>This thesis concerns the position control problems of a DC-
motor driven machine gun turret system. First, based on
physical char- acteristics and the data obtained from
hardware experiments, a mathematically model is obtained for
the motion dynamics of the system. Attention is specially paid
to the effects of frictional force, and the consequence is that
outputs from software simula- tion using the model match those
generated from hardware experi- ments very well. Then, a robust
controller is designed for the system entirely based on the
model, as the approach of feedback linearization is used to
cancel the effects on frictional force. With the controller put
into the hardware loop,the system shows quite good performance
in the responses and robustness with res- pect to disturbances
as well as parameter variations, which are predicted
beforehand in software simulations.
17
Tulomba, Willems Paulino. "Stabilization of the line of sight of a two axis gimballed gun-turret system." Thesis, 2012. http://hdl.handle.net/10210/4879.
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M.Ing.<br>A two-axis gimbal system in the form of a pitch-roll gimbal and a motion simulating platform were developed to extend the capability of an existing ground-to-air prototype gun-turret. The objective was to stabilize the line of sight (LOS) of the gimbal system despite disturbances introduced by the motion simulating platform in real time. The main sensor used for the stabilization is a two-axis accelerometer which was mounted directly on the inner gimbal (roll gimbal) to form a direct-mass stabilization architecture. The stabilization control algorithm was designed and executed in the Labview® environment on a PC, and the accelerometer data is used to drive the two DC motors used as the actuators of this control system. The design of the motion simulating platform was based on a simplified Stewart-Platform and uses pneumatic cylinders as actuating limbs. All sensors and actuators in the motion simulating platform and the gimbal system are integrated with the National Instrument’s CompactRio® and Labview®. The result was a simple stabilization controller capable of achieving basic stabilization of the LOS. However, the hardware and software of this project are capable of more complex control algorithms and that forms the bulk of the suggestions for further studies.
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Chen, Wei-Lun, and 陳維倫. "An Application of Support Vector Machine to Weapon System Fault Diagnosis —A Case Study of an Anti-Air Gun System." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/60172892545013331445.
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碩士<br>國防大學理工學院<br>兵器系統工程碩士班<br>97<br>This thesis studied the feasibility of using the Decision Tree Feature Selection (DTFS) and the support vector machines (SVM) to the machine learning fault diagnosis of an anti-air gun system. The SVM is based on the structural risk minimization (SRM) principle, instead of the experienced risk minimization (ERM) principle. Thus, it is most suitable for fault diagnosis of the smaller sample size. This thesis used an anti-air gun system as the example, and applied DTFS to analyze its testing/measuring nodes, to preserve the featured nodes first, followed the grid searching and cross verification method to find the best combination of the parameters. Then compare the different kernel functions of the SVM, including: Linear, Polynomial, RBF, and Sigmoid, to evaluate the precision of the fault diagnosis to construct the best SVM fault diagnosis system. Finally, the prediction of fault results from SVM was compare with the results from Back Propagation Neural Networks (BPNN), which showed that SVM can get more accurate prediction then the BPNN when the sample size is smaller.
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Pojikar, Pavel. "Výroba zbraní pro Wehrmacht a armády spojenců Německa v českých zbrojovkách za Protektorátu Čechy a Morava v letech 1939-1945." Master's thesis, 2011. http://www.nusl.cz/ntk/nusl-313485.
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The Thesis with title " Armament production for Whermacht and the Army of Aliance in Protectorate of Bohemia and Moravia (1939 - 1945) is interested in detailed description of armament production within quality and quantity armoured of vehicles and infantry weapons made in war years 1939 - 1945 in Czech munition factories. Foreword part deals with Czech production efore Munich agrément,suitable conditions for militarization and empowerment German Army nor the use in industry either for strategy location. In following chapters the work describes main munition factories (Škoda Plzeň - Skoda Werke, ČKD Praha - BMM, Munition faktory Brno)and due to occupation our country,Czechoslovakia,maximal use of technical and human potenciál in Protectorate.The same it documents sale of spare weapons (cannons and munition) and presents German production,too. In other chapters it directs to confrontal of weapons,thein improvement,following development,army tanks, (mainly tank ŠKODA vz. 35, tank ŠKODA vz. 35,light tank LT vz. 38 and later fighter tank and offensive cannons from útočná ČKD Prague , Marder III, Hetzer, Grille), infantry weapons made in Brnopěchotní (Carabine Mauser K98 and gunmachine MG34, MG42, MG131). It mentios the biggest problem of German armament industry during War,that was critical shortage of raw...