检索结果-内蒙古大学图书馆

26th International Conference of Hong Kong Society for Transportation Studies, HKSTS 2022

作者： Wang, Shuling Du, Kejun Jiang, Gege Patwary, A.U.Z. Lo, Hong K. Department of Civil and Environmental Engineering Hong Kong University of Science and Technology Hong Kong School of Intelligent Systems Engineering Sun Yat-sen University Guangdong China

ISBN: (纸本)9789881581402

This paper develops a data driven DNN-BN model (Combing Deep Neural Network and Bayesian Network) which is based on our previous model framework for traffic parameters estimation using sample trajectory data (Wang et al. 2022). The novelty of the DNN-BN model lies in replacing the CTM (Cell Transmission Model) in the conventional CTM-BN model by the DNN. In this way, the traffic parameters and signal timing plans can thus be mapped to the travel time distribution by DNN more efficiently than using the CTM. Numerical studies were conducted using the simulation data from VISSIM. As it is shown, under the penetration rate of 18%, the MAPE of the estimated cycle traffic flow arrival rate mean is generally below 10%. This research indicates that all the hidden features in the CTM model can be accurately captured and fitted by the DNN with few simulation data. And incorporating the DNN into the BN can achieve highly precise traffic parameters estimation. Thus, the DNN-BN model can significantly increase the computational efficiency and reduce the burden of data storage without the loss of estimation accuracy. © 2022 Proceedings of the 26th International Conference of Hong Kong Society for Transportation Studies, HKSTS 2022. All Rights reserved.

关键词： Parameter estimation

来源：评论

学校读者我要写书评

暂无评论

Comparison of Different Methods to Identify the Critical Orientation of Wood-Frame Walls in Assessing Moisture Risks 5th

Comparison of Different Methods to Identify the Critical Ori...

引用

5th International Conference on Building Energy and Environment, COBEE 2022

作者： Aggarwal, Chetan Ge, Hua Defo, Maurice Lacasse, Michael Department of Building Civil and Environmental Engineering Concordia University MontrealQC Canada Group Façade Systems and Products Construction Research Centre National Research Council Ottawa Canada

ISBN: (纸本)9789811998218

For an efficient moisture performance analysis of walls, the selection of wall orientation for undertaking the hygrothermal simulations plays an important role. The wall orientation receiving the highest amount of annual wind-driven rain (WDR) and the one receiving the least annual solar radiation is that which is recommended in ASHRAE 160. There are different methods to select this orientation, called "default orientation" and the objective of this study is to answer two questions: (i) Are the different methods consistent with each other in terms of default orientation selection? (ii) Is the default orientation, as suggested by any method, identical to the orientation that actually (using simulation outputs) leads to the worst moisture response? Four methods for selecting the default orientation were investigated: ASHRAE, ISO, Climatic Index (CI), and product of rain and wind speed (R*v). Simulations were carried out under historical climate of different Canadian cities for two different wood-frame 2 × 6 inch wall systems that differ by their claddings: brick veneer and stucco. A moisture source of 1% of WDR was also assumed to be present on the exterior side of the sheathing membrane. Four cardinal orientations (North, East, South, and West) and the default orientation, as suggested by a given method, were evaluated in this study. Results showed that the ASHRAE and ISO suggest the same default orientation for most of the cases and this orientation also results in the worst performance on the basis of actual simulation results. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Moisture

来源：评论

学校读者我要写书评

暂无评论

Quantifying and Designing Infrastructure for Nonstationary Flood Risks

Quantifying and Designing Infrastructure for Nonstationary F...

引用

IEEE Symposium on systems and Information engineering Design, SIEDS

作者： Lachlan R. Murphy Simrat S. Saini Noah A. Simsic Petey G. von Ahn Justin Zheng Julianne D. Quinn Department of Systems and Information Engineering University of Virginia Charlottesville VA USA Department of Civil and Environmental Engineering University of Virginia Charlottesville VA USA

ISBN: (数字)9798331535759

ISBN: (纸本)9798331535766

In recent years, climate change has led to a rise in intense precipitation events, presenting the need for efficient and cost-effective flood management infrastructure. In Charlottesville, VA, one key area identified for improvement is Meadow Creek. This paper examines different infrastructure options for flood management in Meadow Creek under various climate change scenarios. This analysis is carried out by optimizing infrastructure designs with the environmental Protection Agency’s Storm Water Management Model under uncertain future conditions captured by climate projections from the Coupled Model Intercomparison Project 6. The optimization seeks to minimize cost and runoff volume while maximizing cobenefits. Our findings provide a set of non-dominated green infrastructure solutions and provide a methodology for selecting a recommended compromise solution. This analysis contributes to our goal of addressing flood risks and long-term sustainability in the Charlottesville area.

关键词： Climate change Analytical models Green products Urban areas Air pollution Stormwater Floods Sustainable development Optimization Streams

来源：评论

学校读者我要写书评

暂无评论

Assessing and Tracking Progress Towards Circular Economy for Decision-Making 115

Assessing and Tracking Progress Towards Circular Economy for...

引用

115th Air and Waste Management Association Annual Conference and Exhibition, ACE 2022

作者： Tarroja, Brian Department of Civil & Environmental Engineering Energy Systems Integration Advanced Power and Energy Program University of California Irvine United States

ISBN: (纸本)9781713866602

• We need to develop a framework for tracking progress towards alignment with a circular economy for the life cycles of solar PV and lithium-ion batteries - as well as other products. • This framework needs to be explicitly grounded in circular economy strategies, but also produce information that is relevant for decision makers involved in battery or solar PV life cycles. • To achieve this, challenges regarding data and assessment needs, as well as barriers for translation to decision-relevant information, need to be overcome. © Advanced Power and Energy Program 2022.

关键词： Life cycle

来源：评论

学校读者我要写书评

暂无评论

On the Constrained CAV Platoon Control Problem

引用

IEEE Transactions on Control of Network systems 2025年

作者： Bahavarnia, MirSaleh Ji, Junyi Taha, Ahmad F. Work, Daniel B. Vanderbilt University Department of Civil and Environmental Engineering NashvilleTN37235 United States Institute for Software Integrated Systems United States

The main objective of the connected and automated vehicle (CAV) platoon control problem is to regulate CAVs' position while ensuring stability and accounting for vehicle dynamics. Although this problem has been studied in the literature, existing research has some limitations. This paper presents two new theoretical results that address these limitations: (i) the synthesis of unrealistic high-gain control parameters due to the lack of a systematic way to incorporate the lower and upper bounds on the control parameters, and (ii) the performance sensitivity to the communication delay due to inaccurate Taylor series approximation. To be more precise, taking advantage of the well-known Padé approximation, this paper proposes a constrained CAV platoon controller synthesis that (i) systematically incorporates the lower and upper bounds on the control parameters, and (ii) significantly improves the performance sensitivity to the communication delay. The effectiveness of the presented results is verified through conducting extensive numerical simulations. The proposed controller effectively attenuates the stop-and-go disturbance - a single cycle of deceleration followed by acceleration - amplification throughout the mixed platoon (consisting of CAVs and human-driven vehicles). Modern transportation systems will benefit from the proposed CAV controls in terms of effective disturbance attenuation as it will potentially reduce collisions. © 2014 IEEE.

关键词： Delay control systems

来源：评论

学校读者我要写书评

暂无评论

A Non-Formal Calibration Approach for Trihalomethane Concentrations Applied to the Trunk Network of Bogota’s Water Distribution System

A Non-Formal Calibration Approach for Trihalomethane Concent...

引用

World environmental and Water Resources Congress 2022: Adaptive Planning and Design in an Age of Risk and Uncertainty

作者： Enríquez, Laura Saldarriaga, Juan Dept. of Civil and Environmental Engineering Water Distribution and Sewerage Systems Research Center Univ. of The Andes Bogotá Colombia

ISBN: (数字)9780784484258

ISBN: (纸本)9780784484258

The measurement of water quality parameters, such as chlorine and trihalomethane (THMs) concentrations, is usually performed in only some points of water distribution networks. Therefore, models are created to obtain an approximation to the real behavior of the system. However, in the trunk network of Bogota's water distribution system, the measurements are reported with a frequency greater than the retention time of the network, and they are only performed in a few points throughout the system, which limits model creation. Consequently, this document proposes a non-formal calibration using Monte Carlo simulations for a multispecies model of this network built in EPANET-MSX. The first-order models were adopted for the bulk and wall reactions of chlorine decay, and the linear model was used for TTHMs formation. The methodology consisted in the calibration of the yield of TTHMs coefficient, which was calculated for each pipe depending on a tracer analysis performed for the three water treatment plants (WTPs) of the network. The objective function was built in terms of descriptive statistics given the scarcity of measured data. In this manner, even though the calibration performance was satisfactory, it was found that the parameters for two of the WTPs are not identifiable nor sensitive. Moreover, given the limitations of the method and the scarcity of information, the estimated parameters are considered to have a high uncertainty level. Hence, a higher frequency of measurements is required for a more thorough and less uncertain calibration. © ASCE.

关键词： Water distribution systems

来源：评论

学校读者我要写书评

暂无评论

Forecasting the Range of Possible Human Hand Movement in Consumer Electronics Disassembly Using Machine Learning

引用

Journal of Computing and Information Science in engineering 2025年第5期25卷 051001页

作者： Liao, Hao-Yu Chen, Yuhao Hu, Boyi Liang, Xiao Behdad, Sara Environmental Engineering Sciences University of Florida Gainesville FL 32611 Industrial and Systems Engineering University of Florida Gainesville FL 32611 Department of Civil and Environmental Engineering https://***/01f5ytq51Texas A&M University College Station TX 77843

Robotic technology can benefit disassembly operations by reducing human operators' workload and assisting them with handling hazardous materials. Safety consideration and prediction of the human movement are priorities in close collaboration between humans and robots. The point-by-point forecasting of human hand motion, which forecasts one point at each time, does not provide enough information on human movement due to errors between the actual movement and the predicted value. This study provides a range of possible hand movements to increase safety. It applies three machine learning techniques, including long short-term memory (LSTM), gated recurrent unit (GRU), and Bayesian neural network (BNN) combined with bagging and Monte Carlo dropout (MCD), namely, LSTM-bagging, GRU-bagging, and BNN-MCD to predict the possible movement range. The study uses an inertial measurement unit (IMU) dataset collected from the disassembly of desktop computers by several participants to show the application of the proposed method.

关键词： Artificial neural networks Bayesian neural network long short-term memory Testing Electronics Safety Machine learning remanufacturing Computers Errors Uncertainty Robots disassembly Sensors human–robot collaboration gated recurrent unit artificial intelligence Human-robot collaboration manufacturing automation Robotics human motion prediction

来源：评论

学校读者我要写书评

暂无评论

A System Dynamics Model for Sustainable Irrigation Policy Design Under Water Scarcity and Salinity: From Field Scale to River Basin Scale

SSRN

引用

SSRN 2024年

作者： Aein, Reza Seifi, Abbas Rad, Vahid Zahedi Mousavi, S. Jamshid Department of Civil and Environmental Engineering Iran University of Science and Technology Tehran Iran Department of Industrial Engineering & Management Systems Amirkabir University of Technology Tehran Iran Department of Civil and Environmental Engineering Amirkabir University of Technology Tehran Iran

This research takes a holistic approach to study the interconnection of agricultural water management with socio-economic aspects of sustainable food security. We develop a system dynamics model for sustainable irrigation policy evaluation under water scarcity and salinity from field scale to river basin scale to secure food production within Shapour river basin in Iran. This study integrates the simulation of salinity accumulation, soil-water interaction within the crop root zones as well as annual crop yield, agricultural economics, and water consumption. The model captures the interplay of irrigation demand management and irrigation technology enhancement on the water management side, and the economic balance between the upstream and downstream districts on the socio-economic side, forming the dynamic hypothesis. Five distinct policies have been analyzed in comparison with the status quo to create synergies between technology improvement, demand management, and economic consideration and evaluate their impacts on water quantity, salinity, and crop yields. Computational results reveal that the first three policies relying solely on irrigation technology improvement do not give rise to significant economic growth of the river basin. Nevertheless, they would lead to a 25% increase in irrigation efficiency and water economic value compared with the status quo. The fourth scenario that improves irrigation strategy and crop pattern without changing irrigation technology makes approximately a 25% and 35% enhancement in net economic profit, and water economic value, respectively. Finally, the last scenario, representing a hybrid action on demand management and irrigation technology improvement, constitutes a 25% and 77% surge in the same economic measures. It shows the most efficient water consumption scenario with about 56% and 33% reduction in comparison with the status quo and the fourth scenario. These findings provide valuable insights into the case study and could

关键词： Crops

来源：评论

学校读者我要写书评

暂无评论

OPTIMIZING FLEET ASSIGNMENT DECISIONS FOR REGIONAL AIRLINES WITH HYBRID ELECTRIC AIRCRAFT UPTAKE 34th

OPTIMIZING FLEET ASSIGNMENT DECISIONS FOR REGIONAL AIRLINES ...

引用

34th Congress of the International Council of the Aeronautical Sciences, ICAS 2024

作者： Chan, Ben Deng, Yilin Tran, Nick Wu, Haochen Ikeda, Michael Cinar, Gokcin Li, Max Z. Department of Electrical and Systems Engineering University of Pennsylvania PhiladelphiaPA United States Department of Aerospace Engineering University of Michigan Ann ArborMI United States Department of Industrial and Operations Engineering University of Michigan Ann ArborMI United States RTX Research Center East HartfordCT United States Department of Civil and Environmental Engineering University of Michigan Ann ArborMI United States

Hybrid electric aircraft (HEA), as a promising concept in sustainable aviation, will play a critical role in mitigating the climate impacts of the aviation sector. While many companies have taken up the goal of designing and manufacturing HEA in the near future, there is a technical gap in how to evaluate the operational implementation of HEA within existing airline networks. Significant challenges involve seamlessly integrating HEA into existing airline schedules, ensuring that they are adequately charged for each mission, and strategically assigning HEA with consideration to their range constraints and fuel burn savings. In this study, we address barriers to airline operations of HEA by developing realistic operating cost estimations for HEA, together with a mathematical fleet assignment optimization model to demonstrate practical HEA usage for regional airlines seeking to incorporate these new aircraft into their fleets. We demonstrate our fleet assignment model with a realistic regional airline network, comparing pre-HEA and post-HEA adoption optimal fleet assignments. Our modeling efforts enable the evaluation of the potential for HEA to be integrated into commercial airline fleets, and the potential for cost savings as well as environmental benefits. © 2024, International Council of the Aeronautical Sciences. All rights reserved.

关键词： Cost estimating

来源：评论

学校读者我要写书评

暂无评论

Assessment of Agricultural Drought Vulnerability Based on Crop Growth Stages:A Case Study of Huaibei Plain,China

引用

International Journal of Disaster Risk Science 2023年第2期14卷 209-222页

作者： Yanqi Wei Juliang Jin Haichao Li Yuliang Zhou Yi Cui Nii Amarquaye Commey Yuliang Zhang Shangming Jiang School of Energy and Power Engineering Xihua UniversityChengdu610039China School of Civil Engineering Hefei University of TechnologyHefei230009China Institute of Water Resources and Environmental Systems Engineering Hefei University of TechnologyHefei230009China State Key Laboratory of Hydroscience and Engineering Department of Hydraulic EngineeringTsinghua UniversityBeijing100084China Interdisciplinary Centre for River Basin Environment University of YamanashiKofu400-8510Japan Key Laboratory of Water Conservancy and Water Resources of Anhui Province Water Resources Research Institute of Anhui Province and Huaihe River CommissionMinistry of Water ResourcesHefei230088China

Climate change can lead to and intensify drought *** the vulnerability of disaster-affected elements is significant for understanding the mechanisms that transform drought intensity into eventual *** study proposed a growth-stage-based drought vulnerability index(GDVI)of soybean using meteorological,groundwater,land use,and field experiment data and crop growth model *** CROPGRO-Soybean model was used to simulate crop growth and water *** growth stages were considered since the sensitivity of soybean to drought is strictly related to the growth *** GDVI was applied to the Huaibei Plain,Anhui Province,China,with the goal of quantifying the spatiotemporal characteristics of soybean drought vulnerability in typical years and growth *** results show that:(1)The sensitivity of leaf-related parameters exceeded that of other parameters during the vegetative growth stage,whereas the top weight and grain yield showed a higher sensitivity in the reproductive growth stage;(2)A semi-logarithmic law can describe the relationship between the drought sensitivity indicators and the GDVI during the four growth *** pod-filling phase is the most vulnerable stage for water deficit and with the highest loss upper limit(over 70%);(3)The 2001 and 2002 seasons were the driest time during *** and Huainan Cities were more vulnerable to drought than other regions on the Huaibei Plain in 2001,while Huaibei and Suzhou Cities were the most susceptible areas in *** results could provide effective decision support for the categorization of areas vulnerable to droughts.

关键词： Agricultural drought Drought vulnerability Huaibei plain Soybean growth stages

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：