The Journal of Defense Modeling and Simulation: Applications, Methodology, Technology最新文献

A quantitative comparison of two different models of minefield transit 两种不同雷场过境模式的定量比较

The Journal of Defense Modeling and Simulation: Applications, Methodology, Technology Pub Date : 2024-07-23 DOI: 10.1177/15485129241257528

Mikel D Petty

{"title":"A quantitative comparison of two different models of minefield transit","authors":"Mikel D Petty","doi":"10.1177/15485129241257528","DOIUrl":"https://doi.org/10.1177/15485129241257528","url":null,"abstract":"Naval mines are used to cause damage and inflict casualties on ships and to deny access to mined areas. Two distinctly different Monte Carlo models of surface ships transiting minefields were implemented and compared. An analytic model represents mines abstractly as mine density within the minefield. It determines the probability of a ship encountering a mine as a ratio of the area of the ship’s track through the minefield, with width equal to the mines’ effective radius and the area of the minefield. A geometric model represents the ship’s track and the mines’ locations explicitly. It determines whether a ship encounters a mine using a calculation of the distance between a ship’s track and the mines’ locations. The two models’ results were quantitatively compared for multiple values of five experimental variables: minefield dimensions, mine density, mine placement method, ships per group, and ship transit procedure. Each model was executed for each combination of experimental variable values and their results were compared to determine whether the models produced comparable results. In addition, the effectiveness of two mine placement methods at disabling ships and two ship transit procedures at avoiding mines were also compared. All comparisons used statistical hypothesis tests.","PeriodicalId":508000,"journal":{"name":"The Journal of Defense Modeling and Simulation: Applications, Methodology, Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141810333","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}

引用次数: 0

Cutting edge technologies for future military applications: trends and challenges 未来军事应用的尖端技术：趋势与挑战

The Journal of Defense Modeling and Simulation: Applications, Methodology, Technology Pub Date : 2024-07-01 DOI: 10.1177/15485129241263596

Michael Gargalakos

引用次数: 0

Developing an IoT-enabled probabilistic model for quick identification of hidden radioactive materials in maritime port operations to strengthen global supply chain security 开发基于物联网的概率模型，快速识别海运港口作业中隐藏的放射性物质，加强全球供应链安全

The Journal of Defense Modeling and Simulation: Applications, Methodology, Technology Pub Date : 2024-05-08 DOI: 10.1177/15485129241251490

S. Jakovlev, Tomas Eglynas, Mindaugas Jusis, Miroslav Voznak

引用次数: 0

Statement of requirements on the accuracy of rocket CFD analysis using exterior ballistics for example rocket models 关于利用外部弹道对火箭模型进行 CFD 分析的准确性要求的说明

The Journal of Defense Modeling and Simulation: Applications, Methodology, Technology Pub Date : 2024-04-23 DOI: 10.1177/15485129241247042

A. Baghiyan, H. Sargsyan, A. Grigoryan

引用次数: 0

Enhancing military medical evacuation dispatching with armed escort management: comparing model-based reinforcement learning approaches 利用武装护送管理加强军事医疗后送调度：比较基于模型的强化学习方法

The Journal of Defense Modeling and Simulation: Applications, Methodology, Technology Pub Date : 2024-04-10 DOI: 10.1177/15485129241229762

Andrew G Gelbard, Phillip R. Jenkins, Matthew J. Robbins

{"title":"Enhancing military medical evacuation dispatching with armed escort management: comparing model-based reinforcement learning approaches","authors":"Andrew G Gelbard, Phillip R. Jenkins, Matthew J. Robbins","doi":"10.1177/15485129241229762","DOIUrl":"https://doi.org/10.1177/15485129241229762","url":null,"abstract":"The military medical evacuation (MEDEVAC) dispatching problem involves determining optimal policies for evacuating combat casualties to maximize patient survivability during military operations. This study explores a variation of the MEDEVAC dispatching problem, focusing on controlling armed escorts using a Markov decision process (MDP) model and model-based reinforcement learning (RL) approaches. A discounted, continuous-time MDP model over an infinite horizon is developed to maximize the expected total discounted reward of the system. Two model-based RL solution approaches are proposed: one utilizing semi-gradient descent Q-learning and another employing semi-gradient descent SARSA. A computational example, set in western and central Africa during contingency operations, assesses the performance of the RL-generated policies against the myopic policy, which military medical planners currently employ. Solution quality is derived from expected response time, a crucial determinant of life-saving potential in MEDEVAC operations. The research also explores sensitivity analysis and excursion scenarios to evaluate the RL-generated policies further. By explicitly controlling armed escort assets, dispatching authorities can better manage the location and allocation of these resources throughout combat operations. The findings of this study have the potential to inform military medical planning, operations, and tactics, ultimately leading to improved MEDEVAC system performance and higher patient survivability rates.","PeriodicalId":508000,"journal":{"name":"The Journal of Defense Modeling and Simulation: Applications, Methodology, Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140716997","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}

引用次数: 0

Assessing the US foreign assistance activities impact on violent conflicts 评估美国对外援助活动对暴力冲突的影响

The Journal of Defense Modeling and Simulation: Applications, Methodology, Technology Pub Date : 2024-04-07 DOI: 10.1177/15485129241240760

Daniel F Feze, Mark A Gallagher

{"title":"Assessing the US foreign assistance activities impact on violent conflicts","authors":"Daniel F Feze, Mark A Gallagher","doi":"10.1177/15485129241240760","DOIUrl":"https://doi.org/10.1177/15485129241240760","url":null,"abstract":"The Global Fragility Act, H.R.2116 116th Congress, directs the Department of State to establish an interagency initiative to stabilize conflict-affected areas and prevent violence globally. We propose and demonstrate an approach to evaluate the success of funding these initiatives. The United States Agency for International Development (USAID) has identified deteriorating economies, weak, or illegitimate political institutions, and competition over natural resources as causes of violence, extremism, and instability. The agency prioritizes mitigating the causes and consequences of violent conflicts, instability, and extremism and funds corresponding programs. Focused on military aid, we quantitatively assess these programs effectiveness at preventing or deescalating conflicts during 2010 to 2020. Our statistical analysis shows the funds during that period did not have an immediate impact on countries prone to violence. However, cumulative long-term relationships exist between some funds and the global conflict levels. As the total amount of 5 years cumulative Defense Security Cooperation Agency (DSCA) implemented funds increases, the total number of countries not-in-conflict increases while the total number of the most violent countries decreases. Those funds also correlate to the decline in total conflict levels during that timeframe. This quantitative approach assesses the aggregate effectiveness of aid across various countries.","PeriodicalId":508000,"journal":{"name":"The Journal of Defense Modeling and Simulation: Applications, Methodology, Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140732872","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}

引用次数: 0

Estimation of terminal ballistics parameters for several 7.62×51 mm projectiles using numerical simulations 利用数值模拟估算几种 7.62×51 毫米射弹的末端弹道参数

The Journal of Defense Modeling and Simulation: Applications, Methodology, Technology Pub Date : 2024-03-26 DOI: 10.1177/15485129241240768

Catovic Alan

{"title":"Estimation of terminal ballistics parameters for several 7.62×51 mm projectiles using numerical simulations","authors":"Catovic Alan","doi":"10.1177/15485129241240768","DOIUrl":"https://doi.org/10.1177/15485129241240768","url":null,"abstract":"Six widely used 7.62 ×51 mm projectile types (M80, M61, P80/1, M80A1, M1158, and M993) were subjected to the analysis in this paper. Numerical simulations (Ansys Autodyn) of projectile impacts on hard steel targets were performed as part of this analysis. Projectiles had the same impact velocity (800 m/s). This allowed evaluation of the projectile’s design and material’s effect on its performance against a hard steel target. Validation of the numerical model and used materials was first performed, using available experimental data. A short description and Computer-Aided Design (CAD) model of projectiles is also given. Comparing the M1158 projectile to other AP projectiles taken into consideration, it was concluded that the former had a much deeper penetration depth into a hard steel target (Armox 500T). The projectile’s penetrating capability is greatly impacted by the material selection used for its component parts. Assuming all other factors remain constant, penetrators with higher density and harderness can achieve deeper penetration. Under the same conditions, an increase in penetrator length results in an increase in penetration depth. The absence of a gilding metal jacket in the projectile’s frontal ogive section can decrease energy required to remove the jacket during the penetration, hence increasing the projectile’s penetration capabilities.","PeriodicalId":508000,"journal":{"name":"The Journal of Defense Modeling and Simulation: Applications, Methodology, Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140380155","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}

引用次数: 0

Analysis comparison model of ROC-TOPSIS, ROC-WP, and ROC-Electre methods for supporting the funding decision to micro-enterprises Indonesia ROC-TOPSIS 法、ROC-WP 法和 ROC-Electre 法在支持印度尼西亚微型企业融资决策方面的分析比较模型

The Journal of Defense Modeling and Simulation: Applications, Methodology, Technology Pub Date : 2024-03-25 DOI: 10.1177/15485129241235681

Noerul Hanin, Hendri Purwanto

{"title":"Analysis comparison model of ROC-TOPSIS, ROC-WP, and ROC-Electre methods for supporting the funding decision to micro-enterprises Indonesia","authors":"Noerul Hanin, Hendri Purwanto","doi":"10.1177/15485129241235681","DOIUrl":"https://doi.org/10.1177/15485129241235681","url":null,"abstract":"Micro-business is an essential business unit that supports the economies of countries in the world, including Indonesia. Unfortunately, micro-entrepreneurs often find difficulties to obtain financial assistance from government to develop their businesses. In Indonesia, the smallest number of micro industries can be found in West Papua Province, where one of the underdeveloped areas in the province is the Sorong City. Therefore, a study was conducted to determine the application of decision support methods in selecting micro-enterprises in Sorong that are eligible for business funding. The decision support method chosen is the collaboration between the Rank-Order Centroid (ROC) method, Technique for Order Preference by Similarity to Ideal Solution (TOPSIS), Weight Product (WP), and Elimination Et Choix Traduisant la Realite (Electre). With the analysis conducted on 10 samples of micro-enterprises in Sorong City, it was found that the micro-enterprises that were most eligible to receive assistance is Raya Helm based on ROC-TOPSIS, ROC-WP, and ROC-Electre. Then, sensitivity analysis results the ROC-Electre as the best method with the highest sensitivity percentage. Therefore, the implementation of these methods for supporting the funding decision to micro-enterprises in Sorong was successfully carried out with the output being the micro-enterprise rating results.","PeriodicalId":508000,"journal":{"name":"The Journal of Defense Modeling and Simulation: Applications, Methodology, Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140384586","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}

引用次数: 0

Using combat simulations to determine tactical responses to new technologies on the battlefield 利用战斗模拟确定战场上对新技术的战术反应

The Journal of Defense Modeling and Simulation: Applications, Methodology, Technology Pub Date : 2024-03-22 DOI: 10.1177/15485129241239364

Vikram Mittal, James E Fenn

引用次数: 0

Measuring operational cognitive readiness of military personnel using Joint Theater Level Simulation System (JTLS) 利用联合战区级模拟系统（JTLS）衡量军事人员的作战认知准备状态

The Journal of Defense Modeling and Simulation: Applications, Methodology, Technology Pub Date : 2024-03-22 DOI: 10.1177/15485129241239669

Hasmady Alim, Ananthan Subramaniam, Norazman Mohamad Nor, Amelia Yuliana Abd Wahab

{"title":"Measuring operational cognitive readiness of military personnel using Joint Theater Level Simulation System (JTLS)","authors":"Hasmady Alim, Ananthan Subramaniam, Norazman Mohamad Nor, Amelia Yuliana Abd Wahab","doi":"10.1177/15485129241239669","DOIUrl":"https://doi.org/10.1177/15485129241239669","url":null,"abstract":"Cognitive Readiness refers to military personnel who are cognitively ready to perform effective and efficient roles in military operations with the necessary knowledge, skills, and abilities (KSAs). These KSAs are essential for critical thinking, problem-solving and decision-making. Military personnel at each level in the Malaysian Armed Forces (MAF) must be cognitively ready for military deployment. To enhance the cognitive readiness of military personnel at the operational level, a training design—scenario-based training (SBT) has been developed by the Malaysian Armed Forces Staff College (MAFSC) to develop cognitive readiness for course participants (CPs) who attended staff courses. Joint Theater Level Simulation (JTLS) has been used to analyze the Line of Operation (LOO) that has been produced by the course participant. The results show that SBT affected the development of cognitive readiness to prepare military personnel at the operational level through Joint Warfare environment exercises and tested by Modeling and Simulation (M&S).","PeriodicalId":508000,"journal":{"name":"The Journal of Defense Modeling and Simulation: Applications, Methodology, Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140218882","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}

引用次数: 0