One of the promising areas of space research is the delivery of a container with a payload both during an interplanetary mission and from the Earth's orbit. This can be soil samples mined on the planets of the solar system, or the results of experiments in orbit. To deliver cargo, it is necessary to ensure controlled movement of the descent vehicle in the planet's atmosphere. The article considers the possibility of using inflatable structures for braking and controlling a spacecraft in the planet's atmosphere, as well as parrying disturbing environmental factors. A mathematical model of the movement of the descent vehicle was constructed, which was used to analyze the balancing angles of attack that occur when the payload is deflected. The results obtained using a mathematical model made it possible to determine the overloads acting on the descent vehicle during controlled motion, as well as to determine the hinge moments and calculate the parameters of the descent vehicle trajectory for various atmospheric entry conditions. The data obtained as a result of the research make it possible to draw a conclusion about the possibility of using such descent vehicles, to formulate requirements for the mechanical part of the structure during design.
{"title":"Investigation of the Parameters of the Controlled Motion of a Descent Vehicle with an Inflatable Braking Device","authors":"V. Koryanov, A. S. Kukharenko","doi":"10.1145/3560089.3560104","DOIUrl":"https://doi.org/10.1145/3560089.3560104","url":null,"abstract":"One of the promising areas of space research is the delivery of a container with a payload both during an interplanetary mission and from the Earth's orbit. This can be soil samples mined on the planets of the solar system, or the results of experiments in orbit. To deliver cargo, it is necessary to ensure controlled movement of the descent vehicle in the planet's atmosphere. The article considers the possibility of using inflatable structures for braking and controlling a spacecraft in the planet's atmosphere, as well as parrying disturbing environmental factors. A mathematical model of the movement of the descent vehicle was constructed, which was used to analyze the balancing angles of attack that occur when the payload is deflected. The results obtained using a mathematical model made it possible to determine the overloads acting on the descent vehicle during controlled motion, as well as to determine the hinge moments and calculate the parameters of the descent vehicle trajectory for various atmospheric entry conditions. The data obtained as a result of the research make it possible to draw a conclusion about the possibility of using such descent vehicles, to formulate requirements for the mechanical part of the structure during design.","PeriodicalId":104014,"journal":{"name":"Proceedings of the 4th International Electronics Communication Conference","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134252903","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}
With the development of economy, there are more and more super tall buildings in China, among which the super tall buildings distributed in high intensity areas also increase, so the seismic design of super tall buildings becomes particularly important. The development process of all countries is accompanied by increasing urbanization rate, continuous migration of population to the first and second tier cities and agglomeration to the metropolitan circle. A high degree of urbanization inevitably leads to the development of buildings in cities towards the direction of super high-rise and high plot ratio. The emergence of over-limit high-rise buildings and various complex buildings has brought continuous challenges to building structural engineers. More scientific and feasible seismic theory is needed to guide the seismic design of building structures. In this paper, the seismic optimization design of high-rise building structure is carried out based on Bayesian network algorithm, and the possibility of adopting shock absorption-isolation hybrid seismic technology in practical engineering is discussed through system simulation experiment.
{"title":"Design of Seismic Structure Optimization System for High-rise Building Nased on Bayesian Network Algorithm","authors":"Jingjing Yu","doi":"10.1145/3560089.3560105","DOIUrl":"https://doi.org/10.1145/3560089.3560105","url":null,"abstract":"With the development of economy, there are more and more super tall buildings in China, among which the super tall buildings distributed in high intensity areas also increase, so the seismic design of super tall buildings becomes particularly important. The development process of all countries is accompanied by increasing urbanization rate, continuous migration of population to the first and second tier cities and agglomeration to the metropolitan circle. A high degree of urbanization inevitably leads to the development of buildings in cities towards the direction of super high-rise and high plot ratio. The emergence of over-limit high-rise buildings and various complex buildings has brought continuous challenges to building structural engineers. More scientific and feasible seismic theory is needed to guide the seismic design of building structures. In this paper, the seismic optimization design of high-rise building structure is carried out based on Bayesian network algorithm, and the possibility of adopting shock absorption-isolation hybrid seismic technology in practical engineering is discussed through system simulation experiment.","PeriodicalId":104014,"journal":{"name":"Proceedings of the 4th International Electronics Communication Conference","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126952400","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}
To use heterogeneous hardware, programmers needed sufficient technical skills such as OpenMP (Open Multi-Processing), CUDA (Compute Unified Device Architecture), and OpenCL (Open Computing Language). Therefore, I have proposed environment-adaptive software that enables high-performance operation by automatically converting and configuring the code once written, and have been working on automatic conversion and proper placement. However, until now, where to initially place the converted application has been considered, but the overall optimal placement has not been considered in consideration of the placement status of other users. In this paper, as a new element of environment-adaptive software, I study the relocation during operation, which improves the overall user satisfaction by considering the placement of other users, using a linear programming method. It was confirmed that it can be properly rearranged through simulation experiments.
{"title":"Evaluation of Re-Deployment for Environment-Adaptive Software","authors":"Y. Yamato","doi":"10.1145/3560089.3560102","DOIUrl":"https://doi.org/10.1145/3560089.3560102","url":null,"abstract":"To use heterogeneous hardware, programmers needed sufficient technical skills such as OpenMP (Open Multi-Processing), CUDA (Compute Unified Device Architecture), and OpenCL (Open Computing Language). Therefore, I have proposed environment-adaptive software that enables high-performance operation by automatically converting and configuring the code once written, and have been working on automatic conversion and proper placement. However, until now, where to initially place the converted application has been considered, but the overall optimal placement has not been considered in consideration of the placement status of other users. In this paper, as a new element of environment-adaptive software, I study the relocation during operation, which improves the overall user satisfaction by considering the placement of other users, using a linear programming method. It was confirmed that it can be properly rearranged through simulation experiments.","PeriodicalId":104014,"journal":{"name":"Proceedings of the 4th International Electronics Communication Conference","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126908791","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}
P. Cañizares, Miguel Pérez, A. Núñez, Rosa Filgueira
During the last years, the fast evolution of computers and networks has led to the creation of a wide variety of services that have changed the way we live, like video streaming, online gaming and online shopping. These services are supported by complex systems, which require not only high computational power but high-speed and low-latency networks to fulfil the expected quality requirements. However, a misleading configuration in one of the thousand components that compose these systems may cause performance bottlenecks and functioning disruptions. Unfortunately, conventional testing methods are not adequate for checking these systems since, on many occasions, there is no mechanism to determine if the behaviour of a system is the expected one. Fortunately, Metamorphic Testing is a valuable and promising testing technique that alleviates the two fundamental problems of testing: the oracle problem and the reliable test set problem. In this paper, we combine Metamorphic Testing and simulation techniques for validating communication network configurations in HPC systems. For this, we rely on a catalogue of Metamorphic Relations, based on network communications knowledge, for checking their correctness. In addition, we have conducted an experimental study for analysing the communication networks of HPC systems. The results show that Metamorphic Testing is appropriate for checking the correctness of communication networks supported by complex topologies in HPC systems.
{"title":"Validating communication network configurations in cloud and HPC systems using Metamorphic Testing","authors":"P. Cañizares, Miguel Pérez, A. Núñez, Rosa Filgueira","doi":"10.1145/3560089.3560098","DOIUrl":"https://doi.org/10.1145/3560089.3560098","url":null,"abstract":"During the last years, the fast evolution of computers and networks has led to the creation of a wide variety of services that have changed the way we live, like video streaming, online gaming and online shopping. These services are supported by complex systems, which require not only high computational power but high-speed and low-latency networks to fulfil the expected quality requirements. However, a misleading configuration in one of the thousand components that compose these systems may cause performance bottlenecks and functioning disruptions. Unfortunately, conventional testing methods are not adequate for checking these systems since, on many occasions, there is no mechanism to determine if the behaviour of a system is the expected one. Fortunately, Metamorphic Testing is a valuable and promising testing technique that alleviates the two fundamental problems of testing: the oracle problem and the reliable test set problem. In this paper, we combine Metamorphic Testing and simulation techniques for validating communication network configurations in HPC systems. For this, we rely on a catalogue of Metamorphic Relations, based on network communications knowledge, for checking their correctness. In addition, we have conducted an experimental study for analysing the communication networks of HPC systems. The results show that Metamorphic Testing is appropriate for checking the correctness of communication networks supported by complex topologies in HPC systems.","PeriodicalId":104014,"journal":{"name":"Proceedings of the 4th International Electronics Communication Conference","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131991179","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}
Hui-dong Huangfu, Feng Yan, X. Meng, Peng Zhang, W. Tao
In order to solve the problems with the inaccuracy of the target position attitude, the instability in control system and the strong scattering of the device itself, A new hanging device is designed. The special hanging device has been designed to obtain the high accuracy in the azimuth and elevation position along with the stable control for the target under test. Moreover, the improved performance has been achieved by optimizing structural design and covering the device by microwave absorbing material, which effectively decreased the interaction with target.
{"title":"A Hanging Device Design for the Low Scattering Measurement","authors":"Hui-dong Huangfu, Feng Yan, X. Meng, Peng Zhang, W. Tao","doi":"10.1145/3560089.3560090","DOIUrl":"https://doi.org/10.1145/3560089.3560090","url":null,"abstract":"In order to solve the problems with the inaccuracy of the target position attitude, the instability in control system and the strong scattering of the device itself, A new hanging device is designed. The special hanging device has been designed to obtain the high accuracy in the azimuth and elevation position along with the stable control for the target under test. Moreover, the improved performance has been achieved by optimizing structural design and covering the device by microwave absorbing material, which effectively decreased the interaction with target.","PeriodicalId":104014,"journal":{"name":"Proceedings of the 4th International Electronics Communication Conference","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122491705","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}
For the testing requirements of electromagnetic characteristics of large outdoor equipment, the researchers designed a set of a large foam holder with foam pin connections between layers in a round table shape. For the testing requirements of electromagnetic characteristics of large outdoor equipment, the researchers designed a set of a large foam holder with foam pin connections between layers in a round table shape. The electromagnetic simulation analysis shows that the RCS value of the foam holder can be reduced to below -20dBsm in the frequency range of 300MHz∼40GHz by optimizing the diameter of the bottom surface of the circular table. The mechanical simulation analysis shows that the foam pin connection between the layers of the foam bracket can greatly improve the wind resistance of the bracket and its safety when subjected to ambient extreme wind loads under both no-load and full-load conditions.
{"title":"Large Load Bearing and Low Scattering Foam Holder Design","authors":"Hui-dong Huangfu, Feng Yan, X. Meng, Peng Zhang, Sijin Xiong","doi":"10.1145/3560089.3560094","DOIUrl":"https://doi.org/10.1145/3560089.3560094","url":null,"abstract":"For the testing requirements of electromagnetic characteristics of large outdoor equipment, the researchers designed a set of a large foam holder with foam pin connections between layers in a round table shape. For the testing requirements of electromagnetic characteristics of large outdoor equipment, the researchers designed a set of a large foam holder with foam pin connections between layers in a round table shape. The electromagnetic simulation analysis shows that the RCS value of the foam holder can be reduced to below -20dBsm in the frequency range of 300MHz∼40GHz by optimizing the diameter of the bottom surface of the circular table. The mechanical simulation analysis shows that the foam pin connection between the layers of the foam bracket can greatly improve the wind resistance of the bracket and its safety when subjected to ambient extreme wind loads under both no-load and full-load conditions.","PeriodicalId":104014,"journal":{"name":"Proceedings of the 4th International Electronics Communication Conference","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124695661","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}
Atomic frequency standard of BeiDou system is a frequency source with excellent frequency stability and accuracy. Rail transit is a complex system with high safety requirement. Time synchronization can be in Rail transit operation system in order to realize the positioning navigation, time keeping dissemination and communication. Only achieved time synchronization of all signal equipment of train operation control system, can communication delay between onboard and ground equipment be minimized. Furthermore, the accuracy of train positioning can also be improved and the number of accidents caused by positioning faults will decrease. In this paper, a new rail transit time synchronization network has been proposed. With application of BeiDou timing and satellite communication technology, synchronization accuracy can be improved to nano-second-level. And it is also considered when space-based satellite fails to provide high-quality time signals, which can be solved by train-to-train communication and ground-to-train communication. This research is valuable for forming a large-scale, full-coverage rail transit time synchronization network and achieve unified management of national rail lines.
{"title":"BeiDou Time Synchronization for Rail Transit Operation Network","authors":"Xiaojie Qin, Lei Zhang, Lijuan Shi","doi":"10.1145/3560089.3560099","DOIUrl":"https://doi.org/10.1145/3560089.3560099","url":null,"abstract":"Atomic frequency standard of BeiDou system is a frequency source with excellent frequency stability and accuracy. Rail transit is a complex system with high safety requirement. Time synchronization can be in Rail transit operation system in order to realize the positioning navigation, time keeping dissemination and communication. Only achieved time synchronization of all signal equipment of train operation control system, can communication delay between onboard and ground equipment be minimized. Furthermore, the accuracy of train positioning can also be improved and the number of accidents caused by positioning faults will decrease. In this paper, a new rail transit time synchronization network has been proposed. With application of BeiDou timing and satellite communication technology, synchronization accuracy can be improved to nano-second-level. And it is also considered when space-based satellite fails to provide high-quality time signals, which can be solved by train-to-train communication and ground-to-train communication. This research is valuable for forming a large-scale, full-coverage rail transit time synchronization network and achieve unified management of national rail lines.","PeriodicalId":104014,"journal":{"name":"Proceedings of the 4th International Electronics Communication Conference","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133996285","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}
This research aims to study the effects of manufacturing value-added, consumer price index, and exchange rate on manufacturing exports in the context of Thailand by utilizing the Bayesian Vector Autoregression (BVAR) model with the annual modified data from 1960 to 2019. This model shows the interactions between these four variables and the forecast result. It was revealed that the effect of the exchange rate can pass through the consumer price index, which further affects manufacturing exports. According to the research results, government authorities should pay attention to domestic price control by controlling the general price level by indirectly controlling the exchange rate, which passes through its effect on domestic prices, and directly controlling domestic prices via monetary and fiscal policy. In addition, manufacturers should pay attention to the reduction of the production cost by investing in modern technology and reducing the per unit cost, which leads to a price reduction.
{"title":"The Projection of Thai Manufacturing Export in the Bayesian VAR Model","authors":"N. Rojniruttikul, Adirek Vajrapatkul","doi":"10.1145/3560089.3560106","DOIUrl":"https://doi.org/10.1145/3560089.3560106","url":null,"abstract":"This research aims to study the effects of manufacturing value-added, consumer price index, and exchange rate on manufacturing exports in the context of Thailand by utilizing the Bayesian Vector Autoregression (BVAR) model with the annual modified data from 1960 to 2019. This model shows the interactions between these four variables and the forecast result. It was revealed that the effect of the exchange rate can pass through the consumer price index, which further affects manufacturing exports. According to the research results, government authorities should pay attention to domestic price control by controlling the general price level by indirectly controlling the exchange rate, which passes through its effect on domestic prices, and directly controlling domestic prices via monetary and fiscal policy. In addition, manufacturers should pay attention to the reduction of the production cost by investing in modern technology and reducing the per unit cost, which leads to a price reduction.","PeriodicalId":104014,"journal":{"name":"Proceedings of the 4th International Electronics Communication Conference","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126033401","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}
To identify challenges for future design collaborative systems, we conducted a qualitative study, interviewing expert design practitioners working in creative, multidisciplinary distributed teams The development of shared mental models, previously not examined through the construct of the CSCW ecology, presented four dimensions: task-specific knowledge, task-related knowledge, knowledge of teammates and attitudes/beliefs, where the latter one being the most vulnerable. The study informs the design of future CSCW tools for virtual collaboration tools to fully support remote creative teams.
{"title":"We're Still People And Not Only Emails That We're Sending - Shared Cognition In Distributed Design Collaboration: A qualitative study on distributed creative teams and the relation of communication ecology on virtual collaboration shared understanding.","authors":"Mimi Nguyen, C. Mougenot","doi":"10.1145/3560089.3560096","DOIUrl":"https://doi.org/10.1145/3560089.3560096","url":null,"abstract":"To identify challenges for future design collaborative systems, we conducted a qualitative study, interviewing expert design practitioners working in creative, multidisciplinary distributed teams The development of shared mental models, previously not examined through the construct of the CSCW ecology, presented four dimensions: task-specific knowledge, task-related knowledge, knowledge of teammates and attitudes/beliefs, where the latter one being the most vulnerable. The study informs the design of future CSCW tools for virtual collaboration tools to fully support remote creative teams.","PeriodicalId":104014,"journal":{"name":"Proceedings of the 4th International Electronics Communication Conference","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125102101","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}
The accuracy of electric vehicle DC charger electric energy was directly related to the fairness for charging trade settlement. Aiming at the problem of reliable energy traceability for electric vehicle DC charger, a method of electric energy traceability for DC charger based on wide area multi-source data was proposed. The robust algorithm A statistical method was used to analyze the comparison results to ensure the consistency and reliability of DC energy traceability though the comparison of DC energy metering and calibration capabilities. It is found that the DC energy value obtained by using the method based on wide area multi-source data was closer to the calibration result issued by the superior unit, so as to the evaluation result was more effective comparing with the traditional statistical method. This method can ensure the accuracy and consistency of the electrical energy value of electric vehicle DC charger in the case of the DC value traceability system has not been established, so it has a certain value for promotion and application.
{"title":"Research on an Electric Energy Traceability Method for DC Charger based on Wide Area Multi-source Data","authors":"Yongxian Duan, Junguo Jia, Wei Cen, Jinghui Meng, Ailing Geng","doi":"10.1145/3560089.3560093","DOIUrl":"https://doi.org/10.1145/3560089.3560093","url":null,"abstract":"The accuracy of electric vehicle DC charger electric energy was directly related to the fairness for charging trade settlement. Aiming at the problem of reliable energy traceability for electric vehicle DC charger, a method of electric energy traceability for DC charger based on wide area multi-source data was proposed. The robust algorithm A statistical method was used to analyze the comparison results to ensure the consistency and reliability of DC energy traceability though the comparison of DC energy metering and calibration capabilities. It is found that the DC energy value obtained by using the method based on wide area multi-source data was closer to the calibration result issued by the superior unit, so as to the evaluation result was more effective comparing with the traditional statistical method. This method can ensure the accuracy and consistency of the electrical energy value of electric vehicle DC charger in the case of the DC value traceability system has not been established, so it has a certain value for promotion and application.","PeriodicalId":104014,"journal":{"name":"Proceedings of the 4th International Electronics Communication Conference","volume":"2016 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128068188","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}
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