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Free Space optical communication for Tactical Environment: Potential Applications, Challenges and Mitigation Techniques

Free Space Optical communication for Tactical Environment: P...

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2024 International conference on Computer, Electronics, Electrical engineering and their Applications, IC2E3 2024

作者： Suman, Bhupendra Kumar, Vijay Kumar, Ashok Defence Electronics Applications Laboratory Dehradun India

ISBN: (纸本)9798350388534

Free Space optical (FSO) Communication technology is gaining momentum as a robust, swift, and secure option for broadband communication. By utilizing free space as its medium, FSO offers advantages such as high reliability, fast data transfer rates, and enhanced security, making it an attractive choice for both civilian and military applications. Researchers are actively exploring its potential in various domains due to its numerous benefits, including rapid deployment, absence of the need for licensed spectrum, cost-effectiveness, and simplicity of design compared to traditional Radio Frequency (RF) systems. In tactical environment, FSO can significantly improve communication capabilities, enabling faster and more secure transmission of critical data for battlefield surveillance, operations, and command/control systems. Its resilience against interference and jamming makes it particularly appealing for secure communications in hostile environments. However, challenges like atmospheric turbulence and line-of-sight interruptions pose significant hurdle to fully exploit the capability of FSO for communication grade availability of the link. This paper explores FSO's promise in enhancing communication in tactical environments along with effective strategies to overcome its challenges, facilitating its implementation in military and defense operations. The paper also identifies the research needs on FSO system in Indian weather context. © 2024 IEEE.

关键词： Military communications

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A transformation framework from SLIM to XSAP models for system safety analysis 3

A transformation framework from SLIM to XSAP models for syst...

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3rd International conference on Electronic Information engineering, Big Data, and Computer Technology, EIBDCT 2024

作者： Xiao, Xi Hu, Jun Wang, Lisong Nanjing University of Aeronautics and Astronautics Nanjing211106 China

ISBN: (纸本)9781510680449

In recent years, the safety of complex system applications has received increasing attention. The SLIM language provides a cohesive and unified approach to modeling systems in the aerospace domain. However, there are relatively few studies on the safety analysis of SLIM model. Therefore, this paper proposes a transformation framework from SLIM to XSAP models, effectively enabling safety analysis of SLIM models through model transformation and fault extension. First, we design the framework structure and identify the subset of SLIM that needs to be transformed. Then, we construct the language metamodel for extracting model features. Next, we describe the transformation process and algorithms based on ATL language. The transformed models are further processed to generate nominal model file and fault extension instruction file. The fault extension is implemented by XSAP engine. Finally, we use a typical system case in the aerospace domain to experimentally evaluate the transformation framework, verifying its effectiveness. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词： systems modeling Safety Data modeling Error analysis Multiplexers Statistical modeling Aerospace engineering Analytical research Associative arrays Modeling

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Resilient Polymer Nanocomposites for Type ii Thermal Interface Materials 23

Resilient Polymer Nanocomposites for Type II Thermal Interfa...

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23rd IEEE Intersociety conference on Thermal and Thermomechanical Phenomena in Electronic systems, ITherm 2024

作者： Pokhrel, Geeta Howarter, John A. Wilson, Michael C. Davis, Chelsea S. Purdue University School of Materials Engineering West LafayetteIN47907 United States University of Delaware Department of Mechanical and Materials Science and Engineering NewarkDE19716 United States

ISBN: (纸本)9798350364330

Thermal interface materials (TIMs) in electronics are typically used between the heat source and heat sink to enhance heat dissipation. TIMs are continuously exposed to harsh conditions such as temperature cycling, mechanical stress, humidity, vibration, and shock, which can lead to failure and hinder efficient thermal conduction. Both thermal and mechanical properties are equally important for electronic reliability and performance. However, mechanical properties are often overlooked in the literature compared to thermal properties. This study emphasizes the fabrication of TIMs based on thermoplastic elastomer (TPE) nanocomposites with mechanical robustness and sufficient thermal conductivity. The form factor of the TIM is Type ii, an elastomeric thermal pad. Mechanical robustness in the TIMs is achieved through triblock copolymers of polystyrene-block-polyisoprene-block-polystyrene (SIS). Thermal conductivity of these robust films is enhanced by incorporating functionalized 2D hexagonal boron nitride (BN) nanoplatelets. Above 20 vol.% BN, both in plane and cross plane thermal conductivities decrease. Additionally, the incorporation of the nanoplatelets increases surface roughness, elastic modulus, and mechanical hysteresis. We observe that an increase in nanofiller content negatively impacts mechanical performance without necessarily improving thermal conductivity. Thus, understanding the balance of mechanical and thermal performance is critical for optimization. The results obtained through this research can offer valuable insights for designing elastomeric thermal pads. © 2024 IEEE.

关键词： Nanocomposites

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Multi-objective optimization design of single-stage electromagnetic needle selector with permanent magnet

Multi-objective optimization design of single-stage electrom...

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2022 International conference on Mechatronics engineering and Artificial Intelligence, MEAI 2022

作者： Wang, Tao Mao, Zhen Ju, Cheng State Grid Jiangsu Electric Power Co. Ltd. Nanjing Power Supply Branch Jiangsu Nanjing China Shanghai Institute of Microsystem and Information Technology Shanghai China

ISBN: (纸本)9781510663169

A multi-objective optimization method for electromagnetic actuator with permanent magnet is presented in this paper. The OLS-RBF neural network is improved by introducing gradient descent operator, and the coupling relationship between optimization objective and optimization factor of electromagnetic actuator with permanent magnet is fitted. NSGA-ii algorithm is used to solve the multi-objective optimization of the approximate model obtained by fitting, and its effectiveness and feasibility are verified by simulation. © 2023 SPIE.

关键词： Permanent magnets

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Application and Effect Evaluation of Virtual Reality in Interior design 5

Application and Effect Evaluation of Virtual Reality in Inte...

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5th International conference on Computer Vision and Data Mining, ICCVDM 2024

作者： Xia, Fenghua Luo, Qiong Su, Fang Li, Zheng Han, Luyue Zhao, Xia Zhang, Xiuyan Binzhou Polytechnic Shandong Binzhou256600 China Xihai Primary School in Binzhou Economic and Technological Development Zone Shandong Binzhou256600 China

ISBN: (纸本)9781510682863

In order to create more integrated and realistic indoor space design, we propose the idea of constructing an indoor space design system under the application of virtual reality technology. By combining interactive development technology standards on online platforms, we have successfully achieved visual design of indoor space design systems. We have completed the process of interior space design using techniques such as spatial model construction, original room type modeling, model import, and embedded integrated mapping. The main content of this system includes using a model library and user needs to select different models and generate initial scenarios;Users can roam in this system, and we modify the plan based on their feedback and generate the final plan. This system provides a convenient platform for designers and users to observe design results. By combining 3D modeling technology and virtual reality technology, we have achieved excellent indoor space design results, enriched and expanded the content of indoor space and landscape design, and also provided users with a more convenient experience. This has played a crucial role in promoting the development of interior space design. © 2024 SPIE.

关键词： Architectural design

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A FRAMEWORK TO SUPPORT MULTILEVEL ROBUST CO-design OF MANUFACTURING SUPPLY NETWORKS

A FRAMEWORK TO SUPPORT MULTILEVEL ROBUST CO-DESIGN OF MANUFA...

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ASME International design engineering Technical conferences / Computers and Information in engineering conference (IDETC-CIE) / 49th design Automation conference (DAC)

作者： Baby, Mathew Guptan, Akshay Broussard, Jacob Allen, Janet K. Mistree, Farrokh Nellippallil, Anand Balu Florida Inst Technol Syst Realizat Lab FIT Melbourne FL 32901 USA Univ Oklahoma Syst Realizat Lab OU Norman OK 73019 USA

ISBN: (纸本)9780791887301

Decision-making in the design of Manufacturing Supply Networks (MSNs) is complex owing to the need to account for decisions made by groups at multiple levels and the interactions that include potential conflicts and uncertainties. Decisions are made based on information available from simulations that employ computational models. These models are abstractions of reality and are therefore sources of uncertainty. This necessitates that the focus be placed on design space exploration to identify a robust satisficing solution set. Hence, the need to support the efficient exploration of multilevel design/solution spaces, simultaneously. Many of the frameworks that facilitate multilevel design employ optimization-based iterative approaches that are computationally expensive and ill-suited for design exploration. Frameworks that support robust design exploration are limited by their capability to support the efficient exploration of multilevel design/solution spaces, simultaneously. Hence, the requirement to facilitate the 'multilevel robust co-design and solution space exploration' of MSNs. In this paper, we present a framework that allows designers to: i) model robust decision-making and their interactions across multiple levels, and ii) visualize and systematically carry out co-design exploration of multilevel design/solution spaces. In the framework, we combine a Preemptive formulation of coupled Decision Support Problem with robust design constructs and interpretable-Self-Organizing Maps (iSOM) based visualization to facilitate multilevel robust co-design. We use a steel MSN problem with decisions being made at two levels to test the framework. Using the problem, we demonstrate the utility of the framework in supporting designers in modeling multilevel decision-making under uncertainty and their interactions, and efficient co-design exploration of the robust design/solution spaces in MSNs. The proposed framework is based on information and decision flows, making it ge

关键词： Multilevel systems Robust Co-design Manufacturing Supply Networks

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Discrete sliding mode control for nonlinear systems with unknown inputs and random noise 3

Discrete sliding mode control for nonlinear systems with unk...

引用

3rd International conference on Advanced Manufacturing Technology and Manufacturing systems, ICAMTMS 2024

作者： Shan, Junru Ren, Yan Liu, Yumeng Wang, Qi Inner Mongolia University of Science & Technology School of Information Engineering Baotou China

ISBN: (纸本)9781510681804

The discrete sliding mode tracking control problem of nonlinear systems with unknown inputs and random noise is addressed in this paper. The objective is to design an Unknown Input Observer (UIO) based on the Extended Kalman Filter (EKF) such that the state vector of the whole system can be estimated and the decoupling of the disturbance terms can be achieved. Firstly, the state feedback matrix is solved in conjunction with the Extended Kalman Filter algorithm to minimise the covariance of the output residual signals, which in turn enhances the robustness of the system against random noise. Then, referring to the method of equivalent control and the state information estimated by the improving unknown input observer, we designed the discrete sliding mode controller. Finally, emulation experiments are carried out and the simulation results show the effectiveness and feasibility of the algorithms in this paper. © 2024 SPIE.

关键词： Extended Kalman filters

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The application of VR panoramic technology in B&B design strategies-taking the B&B in southern anhui as an example 3

The application of VR panoramic technology in B&B design str...

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3rd International conference on Electronic Information engineering and Data Processing, EIEDP 2024

作者： Junhua, Xiao Abidin, Shahriman Zainal Vermol, Verly Veto Shah Alam Malaysia

ISBN: (纸本)9781510680531

This paper discusses about Virtual Reality (VR) technology in relation to strategies-thinking. With the advancement of China's rural revitalization and the retaliatory recovery of the tourism industry, there has been a significant change in people's approach to tourism. Travelers now place greater emphasis on regional culture, and there is increasing attention on accommodations, such as rural lodgings, where travelers stay. The study reviews the uniqueness and regional characteristics of accommodations are increasingly being noticed in the field of accommodation design. VR panoramic technology, originating from the perceptual simulation systems that emerged in the 1980s, is an important branch of virtual reality technology. Its emergence quickly became the focus of attention in engineering and technology circles. By employing computer technology, it constructs artificial virtual environments, which are based on static image-based virtual reality technology, to create realistic three-dimensional spaces. VR technology provides an experiential sense based on 3D, allowing individuals to feel as if they are immersed in virtual space, presenting objects within specific spatial contexts. Compared to traditional 2D and 3D technologies, VR technology offers advantages in providing a more immersive real-world experience. The application of VR panoramic technology can combine virtual scenery and interactions with reality, providing clients with a better immersive three-dimensional spatial experience. This study focuses on the transformation and design of characteristic rural accommodations in the Anhui Southern region, researching the application of VR panoramic technology throughout the entire design process of Anhui Southern rural accommodations. By fully leveraging the advantages of VR panoramic technology, such as its realism, comprehensiveness, good interactivity, strong immersion, convenience for designers to inspect problems, more intuitive design renderings, and easy d

关键词： Virtual reality

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Investigation of Temperature, Humidity and Force-Sensitive Sensors for Future Smart Bed Pads 15

Investigation of Temperature, Humidity and Force-Sensitive S...

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15th International conference on Signal Processing systems, ICSPS 2023

作者： Zeynep Aydin, S. Nur Beken, G. Atas, Kubilay Akgol, Volkan Erkmen, Burcu Vural, Revna A. Department of Electrical and Electronics Engineering Marmara University İstanbul Turkey Department of Electrical and Electronics Engineering İstanbul Gelisim University İstanbul Turkey Department of Electronics and Communication Engineering Yildiz Technical University İstanbul Turkey

ISBN: (纸本)9781510675056

In this study, the performance of temperature, humidity, and pressure sensors that can be used in smart mattress pads has been investigated. The measurement accuracy of pressure sensors has been compared for different sponge thicknesses and weights. Among 9 different test cases, the RP-S40-ST force sensor yielded the best results. As for temperature sensors, heat transfer measurements were compared for specific temperatures using different sponge thicknesses. The AHT15 and DS18B20 temperature sensors successfully measured 74% of the applied heat on a 2 cm thick viscoelastic sponge, and 52.4% on a thicker 4 cm sponge. Additionally, the humidity sensor's performance in measuring humidity on the mattress pad was evaluated. Based on these assessments, the sensors that will provide the best results for the design of the mattress pad have been proposed. The influence of the sponge, an essential component of the mattress pad, on the functioning of these sensors was also observed. Moreover, apart from their measurement capabilities, the impact of these sensors on the patient's comfort was also taken into consideration. © 2024 SPIE.

关键词： Pressure sensors

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design of Low Power Flash ADC using TIQ Comparator 2

Design of Low Power Flash ADC using TIQ Comparator

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2nd International conference on Sustainable Computing and Data Communication systems, ICSCDS 2023

作者： Kuppa, Sree Ananda Valli Manikanta, S.D.N.S.S. Gubba, Sai Kumar Kumar, Manchalla.O.V.P. Sheeba, G. Merlin Gokaraju Rangaraju Institute of Engineering & Technology Department of Ece Hyderabad India Jerusalem College of Engineering Department of Ece Chennai India

ISBN: (纸本)9781665491990

This study presents a novel flash ADC design using TIQ Comparator. Due to the extensive use of comparators during the development of a Flash ADC, high power usage is the main problem. Therefore, by designing a comparator with lower power usage, overall power consumption is minimized. The resistive network and differential comparator used in standard Flash ADC can be replaced with a threshold compensated TIQ module that uses the Threshold Inverter Quantizer (TIQ) approach. According to the TIQ design, silicon area, power use, and operation speed have all been improved. Flash ADC is designed using a modified TIQ Comparator that employs power gating technique and also mux based encoder is designed based on transmission gate logic using lector approach. The design is implemented using Tanner EDA using 180nm technology. © 2023 IEEE.

关键词： Comparators (optical)

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