Defence Science Journal最新文献

A Predictive Model with Data Scaling Methodologies for Forecasting Spare Parts Demand in Military Logistics 基于数据标度方法的军事后勤备件需求预测模型

4区工程技术

Defence Science Journal Pub Date : 2023-11-01 DOI: 10.14429/dsj.73.19129

Jae-Dong Kim, Ji-Hwan Hwang, Hyoung-Ho Doh

{"title":"A Predictive Model with Data Scaling Methodologies for Forecasting Spare Parts Demand in Military Logistics","authors":"Jae-Dong Kim, Ji-Hwan Hwang, Hyoung-Ho Doh","doi":"10.14429/dsj.73.19129","DOIUrl":"https://doi.org/10.14429/dsj.73.19129","url":null,"abstract":"This study addresses the challenge of accurately forecasting demand for maintenance-related spare parts of the K-X tank, influenced by high uncertainty and external factors. Deep learning models with RobustScaler demonstrate significant improvements, achieving an accuracy of 86.90% compared to previous methods. RobustScaler outperforms other scaling models, enhancing machine learning performance across time series and data mining. By collecting eight years’ worth of demand data and utilising various consumption data items, this study develops accurate forecasting models that contribute to the advancement of spare parts demand forecasting. The results highlight the effectiveness of the proposed approach, showcasing its superiority in accuracy, precision, recall, and F1-Score. RobustScaler particularly excels in time series analysis, further emphasizing its potential for enhancing machine learning performance on diverse datasets. This study provides innovative techniques and insights, demonstrating the effectiveness of deep learning and data scaling methodologies in improving forecasting accuracy for maintenance spare parts demand.","PeriodicalId":11043,"journal":{"name":"Defence Science Journal","volume":"232 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135566165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Feasibility Study of Lithium Ion Batteries for Torpedo Applications 鱼雷用锂离子电池的可行性研究

4区工程技术

Defence Science Journal Pub Date : 2023-11-01 DOI: 10.14429/dsj.73.19015

Sumeet Sunilrao Ragit, Karandeep Singh, M. Srinivas

引用次数: 0

A Multistage High Capacity Reversible Data Hiding Technique Without Overhead Communication 无开销通信的多级高容量可逆数据隐藏技术

4区工程技术

Defence Science Journal Pub Date : 2023-11-01 DOI: 10.14429/dsj.73.18991

Sanjay Kumar, Gurjit Singh Walia, Anjana Gupta

引用次数: 0

Design Analysis of Mid IR DIAL System for Detection of Hazardous Chemical Species 危险化学物质中红外DIAL检测系统的设计分析

4区工程技术

Defence Science Journal Pub Date : 2023-11-01 DOI: 10.14429/dsj.73.18829

M K Jindal, Mainuddin ., S Veerabuthiran, Atul Kumar

{"title":"Design Analysis of Mid IR DIAL System for Detection of Hazardous Chemical Species","authors":"M K Jindal, Mainuddin ., S Veerabuthiran, Atul Kumar","doi":"10.14429/dsj.73.18829","DOIUrl":"https://doi.org/10.14429/dsj.73.18829","url":null,"abstract":"Nowadays, both military and public agencies are concerned with the remote detection of toxic gases and chemical warfare agents in the atmosphere. A promising method for the remote detection of such harmful chemicals in the atmosphere is Differential Absorption Lidar (DIAL). In the current paper, system design analysis has been carried out to build a DIAL system for the detection of toxic chemical warfare agents, chemical warfare simulants, explosive precursors, and pollutants. The proposed DIAL system comprises an Optical Parametric Oscillator (OPO) based tuneable laser, a 203 mm diameter Cassegrain telescope, a TE-cooled MCT detector, suitable data acquisition hardware, etc. The DIAL output parameters like return signals, SNR, and minimum measurable concentrations have been simulated under different weather conditions such as clear sky, moderately hazy sky, and hazy atmospheric conditions for given system input parameters (pulse energy, detectivity, bandwidth, DAQ resolution, etc.). We have considered chemicals such as Sarin, Thiodiglycol (TDG), acetone, and methane to be detected using the system. Analysis has been carried out for these chemicals present at different locations with varying concentrations. Our analysis reveals that the DIAL system with a laser transmitter of 5 mJ energy and 203 mm receiver telescope is capable of detecting a few ppm concentrations of toxic chemicals present anywhere between the ranges from a few tens of meters to 2 km with topographic target present. The sensitivity of the system in terms of minimum detectable concentrations for the considered chemicals is also estimated for different atmospheric conditions. It is seen that the minimum detectable concentration of TDG is 3.2 ppm in clear weather conditions which increases to 9.2 ppm under a hazy atmosphere. A similar analysis has been carried out for other toxic chemicals and has been discussed in the paper.","PeriodicalId":11043,"journal":{"name":"Defence Science Journal","volume":"232 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135566164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Secrecy of WSN Data Over Nakagami m Fading Channels with Selection Combining Diversity 基于选择组合分集的Nakagami衰落信道WSN数据保密性研究

4区工程技术

Defence Science Journal Pub Date : 2023-11-01 DOI: 10.14429/dsj.73.18804

Hemant Kumar Sharma, Brijesh Kumbhani

引用次数: 0

Fault Tolerant Brushless DC Motor Drive for Aerospace Applications 航空航天应用的容错无刷直流电机驱动器

4区工程技术

Defence Science Journal Pub Date : 2023-11-01 DOI: 10.14429/dsj.73.18898

Harminder Singh Johar, Abhijit Bhattacharya, S. Srinivasa Rao

{"title":"Fault Tolerant Brushless DC Motor Drive for Aerospace Applications","authors":"Harminder Singh Johar, Abhijit Bhattacharya, S. Srinivasa Rao","doi":"10.14429/dsj.73.18898","DOIUrl":"https://doi.org/10.14429/dsj.73.18898","url":null,"abstract":"This article brings out a Fault-tolerant BLDC motor drive for aerospace applications using the redundancy concept. In a way, it brings out a fault-tolerant strategy that can be used to continue the regular operation of a BLDC motor drive even after the occurrence of faults. As BLDC motors are used in critical and dangerous control areas like military services and space vehicles, a fault-tolerant drive is essential to maintain drive operation and provide desirable output. This article compares fault simulation results in the software model of a BLDC motor drive to those of fault simulation results in hardware for three main types of faults. Fault simulation is carried out for three types of faults, viz. inverter device open circuit fault, motor winding open circuit fault, and rotor position sensor (hall sensor) open-circuited fault. Fault tolerance is ensured by introducing a redundant drive (drive-2), which operates the complete drive at the advent of any of the faults mentioned above in the main (healthy) drive-1. A fault-tolerant (redundant) hardware comprising dual stator BLDC motor and redundant controllers is realized and operationalized. Fault simulation is carried out in this hardware, and these results are validated with the results of fault simulation in the MATLAB SIMULINK model. Software and hardware results are comparable and form a basis for developing fault-tolerant electro-mechanical actuation systems for high-reliability, high-cost applications, mainly aerospace.","PeriodicalId":11043,"journal":{"name":"Defence Science Journal","volume":"182 3-4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135614883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nomographs for Polymeric Material Selection for Environmental Conscious Design of Industrial Products 工业产品环保设计中高分子材料选择规范

4区工程技术

Defence Science Journal Pub Date : 2023-11-01 DOI: 10.14429/dsj.73.19016

Vidya Shanker Pandey, Anil Kumar Agrawal, Ashish Dubey

{"title":"Nomographs for Polymeric Material Selection for Environmental Conscious Design of Industrial Products","authors":"Vidya Shanker Pandey, Anil Kumar Agrawal, Ashish Dubey","doi":"10.14429/dsj.73.19016","DOIUrl":"https://doi.org/10.14429/dsj.73.19016","url":null,"abstract":"Environmentally-conscious product design using Life Cycle Assessment (LCA) deserves the utmost attention to save and sustain our planet’s lives, flora and fauna. The choice of materials during the design stage needs to address environmental concerns from their sourcing to production and ultimately going up to the disposal stage. A good majority of industrial products are still not designed, focusing the environmental concerns. The inclusion and practice of the LCA approach during product designing are in a nascent stage not only in India but even over the rest of the world. Nowadays, polymers share a major chunk of the volume of goods produced worldwide and thus have a significant effect on the environment. The available design books or nomographs guide the selection of materials considering several criteria but not considering the related environmental issues. This paper attempts to bridge this gap only for the selection of polymeric materials by providing some easily interpretable and visually ready reckoners in the form of 3-D nomographs. These 3-D nomographs, graphical representations developed using the Solidworks software, echo the material’s Environmental Impact (EI) potential on an axis with some two material properties (e.g., tensile strength and density) on the other two axes. 3-D nomographs are suitably transformed into 2-D nomographs without the loss of any information. EIs on these nomographs were computed using SimaPro software. The potential EI of any product and the overall environmental burden due to them can be significantly reduced, and more so when they are mass-produced, by selecting the right materials using these nomographs. Such an approach will help in fulfilling long-term sustainable development goals of society and the globe.","PeriodicalId":11043,"journal":{"name":"Defence Science Journal","volume":"139 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135565580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Gyroscopic Couple on Aircraft Landing Gear Shimmy 陀螺偶对飞机起落架摆振的影响

4区工程技术

Defence Science Journal Pub Date : 2023-11-01 DOI: 10.14429/dsj.73.18932

Giridharan V, Sivakumar S

引用次数: 0

Design of a Scan Chain for Side Channel Attacks on AES Cryptosystem for Improved Security 针对AES侧信道攻击的扫描链设计以提高安全性

4区工程技术

Defence Science Journal Pub Date : 2023-11-01 DOI: 10.14429/dsj.73.18879

G. Sowmiya, S. Malarvizhi

{"title":"Design of a Scan Chain for Side Channel Attacks on AES Cryptosystem for Improved Security","authors":"G. Sowmiya, S. Malarvizhi","doi":"10.14429/dsj.73.18879","DOIUrl":"https://doi.org/10.14429/dsj.73.18879","url":null,"abstract":"Scan chain-based attacks are side-channel attacks focusing on one of the most significant features of hardware test circuitry. A technique called Design for Testability (DfT) involves integrating certain testability components into a hardware design. However, this creates a side channel for cryptanalysis, providing crypto devices vulnerable to scan-based attacks. Advanced Encryption Standard (AES) has been proven as the most powerful and secure symmetric encryption algorithm announced by USA Government and it outperforms all other existing cryptographic algorithms. Furthermore, the on-chip implementation of private key algorithms like AES has faced scan-based side-channel attacks. With the aim of protecting the data for secure communication, a new hybrid pipelined AES algorithm with enhanced security features is implemented. This paper proposes testing an AES core with unpredictable response compaction and bit level-masking throughout the scan chain process. A bit-level scan flipflop focused on masking as a scan protection solution for secure testing. The experimental results show that the best security is provided by the randomized addition of masked scan flipflop through the scan chain and also provides minimal design difficulty and power expansion overhead with some negligible delay measures. Thus, the proposed technique outperforms the state-of-the-art LUT-based S-box and the composite sub-byte transformation model regarding throughput rate 2 times and 15 times respectively. And security measured in the avalanche effect for the sub-pipelined model has been increased up to 95 per cent with reduced computational complexity. Also, the proposed sub-pipelined S-box utilizing a composite field arithmetic scheme achieves 7 per cent area effectiveness and 2.5 times the hardware complexity compared to the LUT-based model.","PeriodicalId":11043,"journal":{"name":"Defence Science Journal","volume":"170 3-4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135614762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bounded PCA based Multi Sensor Image Fusion Employing Curvelet Transform Coefficients 基于曲波变换系数的有界PCA多传感器图像融合

4区工程技术

Defence Science Journal Pub Date : 2023-11-01 DOI: 10.14429/dsj.73.18949

Aniket Kumar Singh, Debasis Chaudhuri, Shantanu Mitra, Manish Pratap Singh, Bidyarthi Baran Chaudhuri

{"title":"Bounded PCA based Multi Sensor Image Fusion Employing Curvelet Transform Coefficients","authors":"Aniket Kumar Singh, Debasis Chaudhuri, Shantanu Mitra, Manish Pratap Singh, Bidyarthi Baran Chaudhuri","doi":"10.14429/dsj.73.18949","DOIUrl":"https://doi.org/10.14429/dsj.73.18949","url":null,"abstract":"The fusion of thermal and visible images acts as an important device for target detection. The quality of the spectral content of the fused image improves with wavelet-based image fusion. However, compared to PCA-based fusion, most wavelet-based methods provide results with a lower spatial resolution. The outcome gets better when the two approaches are combined, but they may still be refined. Compared to wavelets, the curvelet transforms more accurately depict the edges in the image. Enhancing the edges is a smart way to improve spatial resolution and the edges are crucial for interpreting the images. The fusion technique that utilizes curvelets enables the provision of additional data in both spectral and spatial areas concurrently. In this paper, we employ an amalgamation of Curvelet Transform and a Bounded PCA (CTBPCA) method to fuse thermal and visible images. To evidence the enhanced efficiency of our proposed technique, multiple evaluation metrics and comparisons with existing image merging methods are employed. Our approach outperforms others in both qualitative and quantitative analysis, except for runtime performance. Future Enhancement-The study will be based on using the fused image for target recognition. Future work should also focus on this method’s continued improvement and optimization for real-time video processing.","PeriodicalId":11043,"journal":{"name":"Defence Science Journal","volume":"181 1-2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135614885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0