Tracking, modelling and understanding user activities in e learning platforms have become an emerging need in recent years. Understanding the user's learning behavior will allow e learning platforms to produce act...
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In order to avoid the damage of ammunition to irrelevant personnel in modern war, low collateral damage has been more and more important in urban combat. This paper studied the key problems in the design of a controll...
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ISBN:
(纸本)9781665407656
In order to avoid the damage of ammunition to irrelevant personnel in modern war, low collateral damage has been more and more important in urban combat. This paper studied the key problems in the design of a controllable warhead with low collateral damage. In the design of a controlled warhead with low collateral damage, numerical simulation of explosive driven metal particle scattering was carried out based on ANSYS/LS-DYNA, and the acceleration process of explosive driven metal particles was obtained, and the curves of different mass metal particles with time were given. In addition, the scattering law of the same mass explosive of driving different mass metal particles was also summarized. The above research can provide theoretical basis for the design of a controllable warhead with low collateral damage.
The Simulated annealing algorithm has been widely used in FPGA placement. In this paper, we use deep reinforcement learning to enhance the simulation annealing algorithm. We use the Deep Q-Networks based on graph conv...
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ISBN:
(纸本)9781665402132
The Simulated annealing algorithm has been widely used in FPGA placement. In this paper, we use deep reinforcement learning to enhance the simulation annealing algorithm. We use the Deep Q-Networks based on graph convolution to implement deep reinforcement learning algorithm instead of random method to select the moving block when placer swaps blocks. Experiments show that our method can get a better placement faster than the original VTR in early stage of the placement process.
The introduction of intelligent substation process layer network has caused great changes in the data source and transmission method of relay protection, and its action performance and reliability are increasingly dep...
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ZACube-2 is 3-Unit nanosatellite operating in low earth orbit. As for many electronic devices, the temperature within the satellite is an important factor for the function of some components. Following the assumption ...
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ISBN:
(纸本)9783030564414;9783030564407
ZACube-2 is 3-Unit nanosatellite operating in low earth orbit. As for many electronic devices, the temperature within the satellite is an important factor for the function of some components. Following the assumption that thermal behavior can be modelled by software, ZACube-2 needs to be modelled, simplified, meshed and analysed in NX 12, a computer aided design andsimulation software. To do so required an accurate but simple finite element model of the printed circuit boards (PCBs) for the various satellite subsystems. Specific material properties and finite element methods for modelling PCBs were found. These properties and methods were found by simulating the PCB behavior under thermal loading and comparing to that of tested specimens. The results showed an accuracy between the simulated and tested results of within 3%. The PCBs are used for almost all electronic hardware. They are complex and the approach used introduces a way of modelling them in a simplified but accurate method and using the findings for thermalmodelling. These methods and procedures can be used in various industries that have electronics that are at the risk of overheating to improve the designing process and the efficiency of the product.
Most cases of poor fertilization suffered by men due to the abnormal shape of sperm, weak sperm activity, few numbers of sperm, or the high viscosity of semen. In this paper, an autonomous micro-robot like sperm has b...
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This article presents shaft accuracy increase method using a mathematical modelling. This modelling considers deformation of process system at required process modes. Herewith, given are experimental findings for seve...
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The misuse and arbitrary tampering of digital images by third parties pose a threat to the security and privacy of human subjects, requiring the development of good encryption techniques to meet the security needs of ...
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ISBN:
(纸本)9781665402132
The misuse and arbitrary tampering of digital images by third parties pose a threat to the security and privacy of human subjects, requiring the development of good encryption techniques to meet the security needs of digital images. In this paper, we focus on the image encryption algorithm based on the combination of hyper chaotic system and DNA operation, which divides the digital image into three two-dimensional matrices by R, G and B channels, encrypts the image in blocks, and the chaotic sequence generated by the chaotic system determines the DNA coding, decoding and operation of each image block in the encryption process. The number of chaotic systems in the algorithm is increased and the encryption process is optimized to address the problems of low key space and inability to resist cropping attacks. The simulation results show that the improved encryption algorithm can resist the exhaustive key attack, the correlation of adjacent elements of the encrypted image is greatly reduced, and the encrypted image is resistant to cropping.
Managing student attendance is a repetitive and time-consuming task for both teachers and school administrators. For this reason, we thought of automating this task by deploying the recent advances of machine learning...
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The service-oriented upgrading of traditional manufacturing industry is a dynamic process in which enterprises in the industry interact and play with each other. This study utilized evolutionary game theory to establi...
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ISBN:
(纸本)9781665420648
The service-oriented upgrading of traditional manufacturing industry is a dynamic process in which enterprises in the industry interact and play with each other. This study utilized evolutionary game theory to establish an evolutionary game model for the servitization of enterprises in the traditional manufacturing industry from the perspective of the game behavior of manufacturing enterprises. Through computersimulation, some of the factors affecting the servitization of manufacturing enterprises were analyzed. The results show that government subsidies have a positive effect on the servitization of manufacturing enterprises; the allocation ratio of the total benefits of servitization within the industry must be set in a reasonable interval to promote the servitization of enterprises; the smaller the speculative income, the higher the possibility of enterprises implementing servitization. Finally, suggestions are given to promote the servitization of enterprises.
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