Yang Liu, Hongtao Zhai, Qing Li, Shuai Zhang, Shishu Zhao
Most of the traditional traffic accidents are caused by human factors. Among them, overspeed driving is one of the main causes of serious traffic accidents. Based on the analysis of CIDAS accident data, this paper counted the speed limit of the road section when the speeding accident occurred, and elaborated the test scenarios and test methods of the speed limit information function and speed limit warning function of the speed assist system in the 2021 version of C-NCAP. At the same time, the limitations of the traditional speed limit warning system are analyzed, and the technical route and solution of the current speed assist system for passenger cars are introduced. Finally, three representative models are selected to verify the test scheme, and the test results are simply analyzed.
{"title":"Research on test and evaluation technology of speed assist system","authors":"Yang Liu, Hongtao Zhai, Qing Li, Shuai Zhang, Shishu Zhao","doi":"10.1117/12.2657916","DOIUrl":"https://doi.org/10.1117/12.2657916","url":null,"abstract":"Most of the traditional traffic accidents are caused by human factors. Among them, overspeed driving is one of the main causes of serious traffic accidents. Based on the analysis of CIDAS accident data, this paper counted the speed limit of the road section when the speeding accident occurred, and elaborated the test scenarios and test methods of the speed limit information function and speed limit warning function of the speed assist system in the 2021 version of C-NCAP. At the same time, the limitations of the traditional speed limit warning system are analyzed, and the technical route and solution of the current speed assist system for passenger cars are introduced. Finally, three representative models are selected to verify the test scheme, and the test results are simply analyzed.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115600273","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 autonomous driving technology, more and more attention is paid to the safety of autonomous driving system, such as functional safety, safety of intended functionality and cyber security. Among them, the safety of intended functionality refers to the safety problems caused by the insufficient function of automatic driving system and the harm caused by the misuse of personnel. System theory Analysis method (System Theoretic Process Analysis, STPA) is a kind of analysis method which treat the whole system as one object. In this paper, STPA analysis method is applied to adaptive cruise control (ACC) system, the control schematic of ACC system is constructed, the unsafe control behavior of the system is analyzed, and the system constraints and typical test scenarios are obtained. Taking the front vehicle cutting in scenario as an example, through using autonomous robots and navigable target vehicle, the obstacle avoidance ability of the driver for the front vehicle cutting in scenario with different speeds at 120km/h is tested. When the preceding vehicle cutting in speed is 60km/h, the collision can be avoided whereas the cutting distance is 31.8m or above. When the preceding vehicle cuts in at the speed of 80km/h, the collision can be avoided whereas the cutting distance is 16.7m or above. This index can be used as the requirements for ACC system in the cut-in scenario. In this paper, the ACC system is analyzed in detail for the safety of intended functionality and relevant requirements are given. The whole method and steps are also applicable to other automatic driving systems.
随着自动驾驶技术的发展，自动驾驶系统的安全性越来越受到人们的关注，如功能安全、预期功能安全、网络安全等。其中，预期功能安全是指由于自动驾驶系统功能不足而造成的安全问题，以及人员操作不当造成的危害。系统理论分析方法(System theory Process Analysis, STPA)是一种把整个系统作为一个对象的分析方法。将STPA分析方法应用于自适应巡航控制(ACC)系统，构建了自适应巡航控制系统的控制原理图，分析了系统的不安全控制行为，得到了系统约束条件和典型测试场景。以前车切入场景为例，通过自主机器人和可导航目标车，测试驾驶员在120km/h不同速度下前车切入场景的避障能力。当前车切割速度为60km/h时，在切割距离为31.8m及以上的情况下，可以避免碰撞。当前车以80km/h的速度插车时，在插车距离为16.7m及以上的情况下，可以避免碰撞。该指标可作为接入场景下对ACC系统的要求。本文对ACC系统的预期功能安全性进行了详细的分析，并提出了相应的要求。整个方法和步骤也适用于其他自动驾驶系统。
{"title":"The ACC safety research and application based on system theory process analysis","authors":"Kuiyuan Guo, Juan Shi, Xiaohui Zhang","doi":"10.1117/12.2657897","DOIUrl":"https://doi.org/10.1117/12.2657897","url":null,"abstract":"With the development of autonomous driving technology, more and more attention is paid to the safety of autonomous driving system, such as functional safety, safety of intended functionality and cyber security. Among them, the safety of intended functionality refers to the safety problems caused by the insufficient function of automatic driving system and the harm caused by the misuse of personnel. System theory Analysis method (System Theoretic Process Analysis, STPA) is a kind of analysis method which treat the whole system as one object. In this paper, STPA analysis method is applied to adaptive cruise control (ACC) system, the control schematic of ACC system is constructed, the unsafe control behavior of the system is analyzed, and the system constraints and typical test scenarios are obtained. Taking the front vehicle cutting in scenario as an example, through using autonomous robots and navigable target vehicle, the obstacle avoidance ability of the driver for the front vehicle cutting in scenario with different speeds at 120km/h is tested. When the preceding vehicle cutting in speed is 60km/h, the collision can be avoided whereas the cutting distance is 31.8m or above. When the preceding vehicle cuts in at the speed of 80km/h, the collision can be avoided whereas the cutting distance is 16.7m or above. This index can be used as the requirements for ACC system in the cut-in scenario. In this paper, the ACC system is analyzed in detail for the safety of intended functionality and relevant requirements are given. The whole method and steps are also applicable to other automatic driving systems.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"1276 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127435998","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}
Yiying Zhang, Xiaoning Hou, Hao Liu, Quanlei Wang, Huailin Liu
This paper develops an automatic system for the surface distress inspections on the urban public areas, including sidewalks, squares, and parking lots. This inspection system integrates an industrial 3D camera, a positioning system supporting both GNSS and Beidou, a distance measurement instrument (DMI), an inertial measurement unit (IMU), a power supply, a time synchronization technology, and a data acquisition software, such that it can collect 3D images of the surfaces of the urban public areas at a normal walking speed (~5km/hr). This inspection system has several advantages over the traditional manual inspections, such as low cost, high efficiency, low power consumption and compacted size. The field tests are conducted on the urban public areas in Nan’an District to validate the effectiveness of the inspection system. The engineering applications indicate that the inspection system works well and collects high-quality 3D images in either time mode or distance mode. The collected 3D images will be used for further analysis of the surface distress extractions, such as crack, pothole, and faulting. Finally, a basic neutral network is created to determine if there are distresses in the 3D images from field tests with the accuracy higher than 90%, which is very promising.
{"title":"Research on the inspection technology of the urban public areas","authors":"Yiying Zhang, Xiaoning Hou, Hao Liu, Quanlei Wang, Huailin Liu","doi":"10.1117/12.2658571","DOIUrl":"https://doi.org/10.1117/12.2658571","url":null,"abstract":"This paper develops an automatic system for the surface distress inspections on the urban public areas, including sidewalks, squares, and parking lots. This inspection system integrates an industrial 3D camera, a positioning system supporting both GNSS and Beidou, a distance measurement instrument (DMI), an inertial measurement unit (IMU), a power supply, a time synchronization technology, and a data acquisition software, such that it can collect 3D images of the surfaces of the urban public areas at a normal walking speed (~5km/hr). This inspection system has several advantages over the traditional manual inspections, such as low cost, high efficiency, low power consumption and compacted size. The field tests are conducted on the urban public areas in Nan’an District to validate the effectiveness of the inspection system. The engineering applications indicate that the inspection system works well and collects high-quality 3D images in either time mode or distance mode. The collected 3D images will be used for further analysis of the surface distress extractions, such as crack, pothole, and faulting. Finally, a basic neutral network is created to determine if there are distresses in the 3D images from field tests with the accuracy higher than 90%, which is very promising.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124938122","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}
A variable damping viscous damper is designed, which can change the size of the effective circulation area of the damping fluid under the action of external force to achieve the effect of variable damping coefficient by setting a shaped conical rod member in the damping hole. The mechanical model of the damper was derived and calculated according to the design method by combining the hole shrinkage effect and frictional energy dissipation principle. The damping performance of the dampers was tested by adding them to a six-story reinforced concrete frame structure. The results show that the pore-type variable damping viscous hysteresis damper proposed in this paper has a significant effect of variable damping at larger displacements, and the energy dissipation capacity of the damper increases gradually with the increase of the input frequency; under the action of rare intensity, the dampers have a good damping performance with the top layer displacement and acceleration reduction rate of 24.02% and 14.37% respectively for the reinforced concrete frame model structure in this paper.
{"title":"A new variable damping viscous dampers and vibration damping performance research","authors":"Tongshuai Sun, Lin Shen, Xin Guo, Yanhui Wang","doi":"10.1117/12.2657911","DOIUrl":"https://doi.org/10.1117/12.2657911","url":null,"abstract":"A variable damping viscous damper is designed, which can change the size of the effective circulation area of the damping fluid under the action of external force to achieve the effect of variable damping coefficient by setting a shaped conical rod member in the damping hole. The mechanical model of the damper was derived and calculated according to the design method by combining the hole shrinkage effect and frictional energy dissipation principle. The damping performance of the dampers was tested by adding them to a six-story reinforced concrete frame structure. The results show that the pore-type variable damping viscous hysteresis damper proposed in this paper has a significant effect of variable damping at larger displacements, and the energy dissipation capacity of the damper increases gradually with the increase of the input frequency; under the action of rare intensity, the dampers have a good damping performance with the top layer displacement and acceleration reduction rate of 24.02% and 14.37% respectively for the reinforced concrete frame model structure in this paper.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115016465","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 upgrading of urban planning and construction, resilient city construction has gradually become an important proposition to promote urban sustainable development. Resilient disaster prevention is its main content, in which the seismic resilience of lifeline bridge is particularly important. This paper conducts the seismic fragility analysis of a three-tower cable-stayed bridge to assess its seismic performance and facilitate the subsequent seismic resilience evaluation of the cable-stayed bridge. The finite element model for the bridge is established using OpenSees platform. The fragility curves of the main components of the bridge are established by adopting the fragility model based on incremental dynamic analysis (IDA), and the fragility of the whole bridge is evaluated using the narrow bound method. The results show that the tower is the most fragile component, while the failure probability of the cable is relatively low. The failure of the whole bridge is mainly determined by the tower.
{"title":"Seismic fragility assessment of a three-tower cable-stayed bridge based on OpenSees platform","authors":"Chen Chen, Jinlong Liu, Junqi Lin","doi":"10.1117/12.2657887","DOIUrl":"https://doi.org/10.1117/12.2657887","url":null,"abstract":"With the upgrading of urban planning and construction, resilient city construction has gradually become an important proposition to promote urban sustainable development. Resilient disaster prevention is its main content, in which the seismic resilience of lifeline bridge is particularly important. This paper conducts the seismic fragility analysis of a three-tower cable-stayed bridge to assess its seismic performance and facilitate the subsequent seismic resilience evaluation of the cable-stayed bridge. The finite element model for the bridge is established using OpenSees platform. The fragility curves of the main components of the bridge are established by adopting the fragility model based on incremental dynamic analysis (IDA), and the fragility of the whole bridge is evaluated using the narrow bound method. The results show that the tower is the most fragile component, while the failure probability of the cable is relatively low. The failure of the whole bridge is mainly determined by the tower.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"617 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116399741","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}
In order to investigate the fire smoke diffusion and migration characteristics of super large cross-section urban tunnel, a 1/15 scaled tunnel model was established based on Xintang interchange with covered, and experiments were carried out under the longitudinal smoke exhaust mode. The morphological characteristics of the smoke layer and the smoke temperature distribution in the tunnel under different longitudinal air velocity under the longitudinal smoke exhaust mode are obtained, the critical air velocity of the actual project is determined. Results indicated that, during the initial stage of fire in large cross-section road tunnel, the fire scale and air velocity are important factors, which affect the temperature field and smoke diffusion. The hot smoke from the fire in tunnel tends to diffuse to the vault. Therefore, the high temperature region occupied the upper space of the tunnel, while the temperature of lower part was lower. Larger inner space of large cross-section road tunnel is conductive for fire smoke spreading. The longitudinal smoke exhaust wind velocity that controls the smoke not to produce countercurrent is about 3.0 m/s. Due to the elimination of the diaphragm in the same direction, the heat generated by the fire source has an impact on the downstream of the adjacent ramp. The temperature in the downstream area of adjacent ramps increased, which is lower than 30 ℃.
{"title":"Experimental research on fire smoke exhausting of super large cross-section urban tunnel","authors":"Zhengmao Cao, Xiao Liu","doi":"10.1117/12.2658669","DOIUrl":"https://doi.org/10.1117/12.2658669","url":null,"abstract":"In order to investigate the fire smoke diffusion and migration characteristics of super large cross-section urban tunnel, a 1/15 scaled tunnel model was established based on Xintang interchange with covered, and experiments were carried out under the longitudinal smoke exhaust mode. The morphological characteristics of the smoke layer and the smoke temperature distribution in the tunnel under different longitudinal air velocity under the longitudinal smoke exhaust mode are obtained, the critical air velocity of the actual project is determined. Results indicated that, during the initial stage of fire in large cross-section road tunnel, the fire scale and air velocity are important factors, which affect the temperature field and smoke diffusion. The hot smoke from the fire in tunnel tends to diffuse to the vault. Therefore, the high temperature region occupied the upper space of the tunnel, while the temperature of lower part was lower. Larger inner space of large cross-section road tunnel is conductive for fire smoke spreading. The longitudinal smoke exhaust wind velocity that controls the smoke not to produce countercurrent is about 3.0 m/s. Due to the elimination of the diaphragm in the same direction, the heat generated by the fire source has an impact on the downstream of the adjacent ramp. The temperature in the downstream area of adjacent ramps increased, which is lower than 30 ℃.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129531768","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}
Jie Wu, Liu He, Zongxue Yan, Gui Qian, Quansheng Chen, Hong-bing Wu
To solve the problem of waste-mud accumulation both occupying land resources and polluting the ecological environment, cement is used as a curing agent to cure the waste-mud to become a perfect roadbed filler, and the engineering performance of solidified mud was studied with unconfined compressive strength (UCS), moisture content, compaction performance, and California bearing ratio (CBR) as evaluation indexes. The evaluation results show 1) that cement has a good curing effect on waste-mud and can improve its strength and stability; 2) that the water content and maximum dry density (MDD) of cured slurry decrease with the increase of cement admixture, and the optimal moisture content increases with the increase of cement admixture; 3) that CBR increases with the increase of cement admixture and maintenance days; 4) that the moisture content of cured slurry with 14% cement admixture is similar to its optimal water content (OWC) at the maintenance age of 14 d; thus, it can be considered that the curing slurry with 14% cement could be directly used as roadbed fillers.
{"title":"Curing of waste-mud and its road performance evaluation","authors":"Jie Wu, Liu He, Zongxue Yan, Gui Qian, Quansheng Chen, Hong-bing Wu","doi":"10.1117/12.2658587","DOIUrl":"https://doi.org/10.1117/12.2658587","url":null,"abstract":"To solve the problem of waste-mud accumulation both occupying land resources and polluting the ecological environment, cement is used as a curing agent to cure the waste-mud to become a perfect roadbed filler, and the engineering performance of solidified mud was studied with unconfined compressive strength (UCS), moisture content, compaction performance, and California bearing ratio (CBR) as evaluation indexes. The evaluation results show 1) that cement has a good curing effect on waste-mud and can improve its strength and stability; 2) that the water content and maximum dry density (MDD) of cured slurry decrease with the increase of cement admixture, and the optimal moisture content increases with the increase of cement admixture; 3) that CBR increases with the increase of cement admixture and maintenance days; 4) that the moisture content of cured slurry with 14% cement admixture is similar to its optimal water content (OWC) at the maintenance age of 14 d; thus, it can be considered that the curing slurry with 14% cement could be directly used as roadbed fillers.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129463589","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 paper presents an analytical method for calculating the stability of rolling stock to address some overturning problems associated with the railway vehicles in crosswinds. Based on the quasi-steady theory, a calculation formula with consideration of the effects of different turbulent components and various incoming wind direction, is proposed to predict the aerodynamic forces on the moving vehicle. A steady overturning model and the dynamic multi-body simulation (MBS) are then set up to calculate the wheel unloading factor of railway vehicles. Furthermore, the characteristic wind curves (CWC) for determining the crosswind stability of vehicles are given. It is found that higher mean wind and vehicle speeds generally increase the risk of overturning. The result obtained from the static analysis can be used as an approximate overturning assessment due to the simple model and built-in margins. The dynamic effects of the track irregularity and wind turbulence make the critical wind speed in the MBS method is possible to be more precise. The calculated CWC in the study case can guide the operation and management of railway vehicles in a strong crosswind environment.
{"title":"Assessment of overturning risk of railway vehicles in crosswinds","authors":"Z. Yao, Shengjie Deng, Xiaoda Li","doi":"10.1117/12.2658133","DOIUrl":"https://doi.org/10.1117/12.2658133","url":null,"abstract":"This paper presents an analytical method for calculating the stability of rolling stock to address some overturning problems associated with the railway vehicles in crosswinds. Based on the quasi-steady theory, a calculation formula with consideration of the effects of different turbulent components and various incoming wind direction, is proposed to predict the aerodynamic forces on the moving vehicle. A steady overturning model and the dynamic multi-body simulation (MBS) are then set up to calculate the wheel unloading factor of railway vehicles. Furthermore, the characteristic wind curves (CWC) for determining the crosswind stability of vehicles are given. It is found that higher mean wind and vehicle speeds generally increase the risk of overturning. The result obtained from the static analysis can be used as an approximate overturning assessment due to the simple model and built-in margins. The dynamic effects of the track irregularity and wind turbulence make the critical wind speed in the MBS method is possible to be more precise. The calculated CWC in the study case can guide the operation and management of railway vehicles in a strong crosswind environment.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123845317","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}
Baobao Hu, Xin Jiang, Haitao Xing, Shenghua Chen, Zhibo He
The SOTIF has become the biggest obstacle to the large-scale commercial use of intelligent driving. Based on the domestic research status, this paper points out that there is a problem of heavy intelligence and weak connected in SOTIF, which deviates from the technological route of the coordinated development of intelligence and connected in China. In view of this problem, combined with my work practice, under the guidance of ISO21448 specification, this paper puts forward a SOTIF research framework for Cooperative Sensing System based on Road-side Infrastructure Support. Its feature is that it takes the vehicle perception as the core, uses the road-side perception system as a part of the vehicle sensing for data fusion and target recognition, and proposes an overall evaluation framework and quantitative index system, which provides ideas and directions for further research.
{"title":"Research on the SOTIF of intelligent connected vehicle cooperative sensing system based on road-side infrastructure support","authors":"Baobao Hu, Xin Jiang, Haitao Xing, Shenghua Chen, Zhibo He","doi":"10.1117/12.2658712","DOIUrl":"https://doi.org/10.1117/12.2658712","url":null,"abstract":"The SOTIF has become the biggest obstacle to the large-scale commercial use of intelligent driving. Based on the domestic research status, this paper points out that there is a problem of heavy intelligence and weak connected in SOTIF, which deviates from the technological route of the coordinated development of intelligence and connected in China. In view of this problem, combined with my work practice, under the guidance of ISO21448 specification, this paper puts forward a SOTIF research framework for Cooperative Sensing System based on Road-side Infrastructure Support. Its feature is that it takes the vehicle perception as the core, uses the road-side perception system as a part of the vehicle sensing for data fusion and target recognition, and proposes an overall evaluation framework and quantitative index system, which provides ideas and directions for further research.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"628 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123340433","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}
Under the national "double carbon" goal, taking the prefabricated building as the research goal, the system dynamics model of prefabricated building is constructed using Vensim software. Draw the causal circuit diagram and stock flow diagram, determine the model equation, study the relationship and action mechanism between different influencing factors of prefabricated buildings. Simulate the change trend of carbon emission of prefabricated buildings under the time series, investigate the sensitivity of eight types of industrial policy changes to the system. Taking Xi'an city as an example, the results show that the market share of prefabricated buildings in Xi'an city will reach 52%, and the total emission reduction will reach 12.56 million tons in 2030. Industrial policies play an obvious role in promoting the development of prefabricated buildings. The implementation of construction policies, fiscal policies, technical policies and ecological development policies have good effects, which plays a great role in promoting the development of prefabricated buildings and energy conservation and emission reduction in Xi'an City, and provide references for emission reduction in other cities.
{"title":"Emission reduction prediction and policy simulation of prefabricated buildings using system dynamics","authors":"Linqian Tian, R. Jiang, Xiaowan Chen, Jiancang Xie, Ling Wang, Xinyi Liu, Jiaote Dang","doi":"10.1117/12.2658301","DOIUrl":"https://doi.org/10.1117/12.2658301","url":null,"abstract":"Under the national \"double carbon\" goal, taking the prefabricated building as the research goal, the system dynamics model of prefabricated building is constructed using Vensim software. Draw the causal circuit diagram and stock flow diagram, determine the model equation, study the relationship and action mechanism between different influencing factors of prefabricated buildings. Simulate the change trend of carbon emission of prefabricated buildings under the time series, investigate the sensitivity of eight types of industrial policy changes to the system. Taking Xi'an city as an example, the results show that the market share of prefabricated buildings in Xi'an city will reach 52%, and the total emission reduction will reach 12.56 million tons in 2030. Industrial policies play an obvious role in promoting the development of prefabricated buildings. The implementation of construction policies, fiscal policies, technical policies and ecological development policies have good effects, which plays a great role in promoting the development of prefabricated buildings and energy conservation and emission reduction in Xi'an City, and provide references for emission reduction in other cities.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114724187","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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