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3rd IEEE World engineering Education Conference, EDUNINE 2019

作者： Delgado, Alexi Ayala, Betsabe Romero, I. Department of Engineering Mining Engineering Section Pontificia Universidad Católica Del Peru - PUCP Lima Peru Systems Engineering Program Universidad de Ciencias y Humanidades Lima Peru Research Institute of Water and Environmental Engineering Universitat Politècnica de València Valencia Spain

ISBN: (纸本)9781728116662

Social impact assessment (SIA) is a topic very important to prevent environmental conflicts. Particularly, in Peru there are many social conflicts from the implementation of mining projects. In this work, SIA was conducted using the grey clustering method, which is an approach based on grey systems theory. The grey clustering method can be applied by incidence matrixes or whitenization functions;in this study, we applied center-point triangular whitenization weight functions (CTWF). In turn, a case study was developed on a mining project located in Cajamarca, Peru. In case study, seven evaluation criteria were established. The results revealed that the project would have normal social impact. In addition, the criterion more controversial was access to drinking water. Consequently, the method showed quantitative and qualitative results that could help central and local governments to make the best decision on the mining project. Moreover, the grey clustering method showed interesting results that could be apply to SIA from other projects or programs. © 2019 IEEE.

关键词： Potable water

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Improvements on Interpolation Techniques based on Linear programming for Constrained Control

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IFAC-PapersOnLine 2017年第1期50卷 1403-1408页

作者： Rubin D. Mercader P. Nguyen H.-N. Gutman P.-O. Baños A. Autonomous Systems Program Technion – Israel Institute of Technology Haifa Israel Department of Computer and System Engineering University of Murcia Murcia Spain Control Signal and System Department IFP Energies Nouvelles Lyon France Faculty of Civil and Environmental Engineering Technion – Israel Institute of Technology Haifa Israel

We present some improvements on interpolation based control (IC) for linear discrete-time systems with polyhedral constraints on the control and the states variables. The plant may be uncertain, time-varying, and subject to bounded disturbances. Roughly speaking, IC approach is based on the interpolation between an inner and an outer controller. The extension presented here is twofold. On the one hand, the IC approach is extended to deal with higher order inner controllers, making it e.g. possible to incorporate integral action in a vicinity of the origin. On the other hand, this paper presents a modification that better exploits the control signal range. As with previous IC strategies, the presented method demands relatively low online computational resources, and is applicable also to uncertain plants. The benefits of the improved scheme are illustrated in some examples. © 2017

关键词： Constrained control Linear programing Model predictive optimization-based control Robust control Time-varying systems

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Estimation challenges of lateral pressures in retaining structures using granular recycled tire aggregates as backfill

Estimation challenges of lateral pressures in retaining stru...

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2014 Congress on Geo-Characterization and Modeling for Sustainability, Geo-Congress 2014

作者： Garcia-Theran, Mauricio Pando, Miguel A. Celis, Hebenly Abdoun, Tarek Infrastructure and Environmental Systems PhD Program University of North Carolina at Charlotte 9201 University City Blvd Charlotte NC 28223 United States School of Civil Engineering Universidad Industrial de Santander Bucaramanga Colombia Department of Civil and Environmental Engineering Rensselaer Polytechnic Institute 110 Eighth Street Troy NY United States

ISBN: (纸本)9780784413272

The civil engineering community is a leader in national and international efforts toward sustainability, recycling, and reuse of materials. For example, asphalt is the most recycled material on earth, which is approximately 13 times the newsprint recycling and 27 times the glass bottles recycling. Recycled materials that have been used as borrow materials for embankment construction and retaining wall backfills include recycled asphalt, recycled concrete, tire-derived aggregates (TDA), blast furnace slag, steel slag, coal bottom ash/ boiler slag, flue gas desulfurization scrubber, cullet glass, and roofing shingles. Some of these recycled materials offer potential environmental, technical, and economical benefits for retaining-wall applications. For example, when compared with natural soils, many may offer the advantage of reduced lateral earth pressures and foundation settlement due to smaller unit weight and potentially higher drainage capacity. However, implicit in some of these options is the applicability of conventional soil mechanical principles in the design and technical assessment. In this paper we present experimental data from laboratory and model tests (centrifuge and model retaining walls) that highlight the challenges involved when trying to predict lateral pressures induced by a recycled wall backfill composed of tire derived aggregate. A key difference of this type of granular material is related to the nature of their particles, which are deformable and can exhibit viscous behavior. The experimental results are compared with classical lateral earth theories for active, passive, and at-rest conditions. The manuscript also includes an assessment of the time dependency of the at-rest pressures induced by TDA backfill. © 2014 American Society of Civil Engineers.

关键词： Glass

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A mathematical model for resource allocation in population programs

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Demography 1972年第3期9卷 465-483页

作者： Lawrence, Charles E. Mundigo, Axel I. ReVelle, Charles S. Center for Environmental Quality Management Cornell University Troy 12181 New York United States Systems Engineering Division Rensselaer Polytechnic Institute Troy 12181 New York United States The International Population Program Cornell University Ithaca 14850 New York United States Department of Geography and Environmental Engineering The Johns Hopkins University Baltimore 21218 Maryland United States

The reduction of population growth rates through family planning programs is being attempted in many of the developing nations of the world. This activity lends itself aptly to mathematical modeling. Building from the well-known difference equation model of population growth, a model is constructed which integrates population dynamics, program activities, and resource consumption. The model may be used predictively to assess the outcome of various program activities. Alternatively, it may be used to determine the pattern of activities which yields the greatest reduction in births under the projected resource constraints. A further use of the model is the identification of the parameters to which predictions are most sensitive;such information provides valuable insights to those gathering the input data. The model is here applied to a family planning program currently in progress. An evaluation of the feasibility of that program's goals is provided, as well as information on limiting resources, data sensitivity, and the most important ages for contraceptive acceptance. © 1972 Population Association of America.

关键词： Family Planning Life Table Planning Horizon Family Planning Service Family Planning program

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Current Panorama, Practice Gaps, and Recommendations to Accelerate the Transition to a Circular Bioeconomy in Latin America and the Caribbean

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Circular Economy and Sustainability 2022年第1期2卷 281-312页

作者： Salvador, Rodrigo Pereira, Reinalda Blanco Sales, Gabriel Fernandes de Oliveira, Vanessa Campana Vergani Halog, Anthony De Francisco, Antonio C. Sustainable Production Systems Laboratory (LESP) Graduate Program in Industrial Engineering (PPGEP) Universidade Tecnológica Federal Do Paraná (UTFPR) Ponta Grossa Brazil School of Earth and Environmental Sciences The University of Queensland St Lucia 4072 QLD Australia

The rampant use of resources and the increasing risk of scarcity have been contributing to greater awareness regarding the need for maintaining resources in use for longer and the shift to renewable alternatives, in which perspective the concept of a circular bioeconomy (CBE) has been permeating the most diverse sectors. Therefore, the study’s aims were manifold: identify (i) existing practices and initiatives, (ii) barriers and potential opportunities and (iii) existing gaps for advancing a circular bioeconomy in Latin America and the Caribbean (LAC) and (iv) provide recommendations aiming at the development of a circular bioeconomy (CBE) in the region. To that end, a systematic review of the existing academic literature was done, and reports from relevant non-peer reviewed sources were also consulted. CBE practices in LAC are concentrated in only a few of the countries in the region and very much revolve around recovering value from by-products and waste streams. There are a range of economic, technological, environmental, and social barriers. Opportunities for a CBE are mainly related to the use of waste as raw material (found abundantly in the countries being investigated) and the use of new techniques/technologies. The gaps between the current state and a successful CBE are related to policy, scaling-up, collaborations, and establishing efficient business models. Recommendations for a successful CBE in the region include greater engagement of public actors, investing and developing the local economy, establishing biorefineries and industrial parks, and finding new technological routes for bioresources. © 2021, The Author(s), under exclusive licence to Springer Nature Switzerland AG.

关键词： Bioeconomy Circular bioeconomy Circular business Circular economy Latin America Policy

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Modeling of state of vegetation and soil erosion over large areas

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International Journal of Sediment Research 2008年第3期23卷 181-196页

作者： Zhao-Yin WANG1*, Guangqian WANG2, and Guohe HUANG31 Prof., State Key Laboratory of Hydroscience and engineering, Tsinghua University, Beijing 100084, China2 Prof., State Key Laboratory of Hydroscience and engineering, Tsinghua University, Beijing 100084, China3 Prof. and Canada Research Chair, environmental systems engineering program, Faculty of engineering, University of Regina, Regina, Sask S4S 0A2, Canada [a]Prof. State Key Laboratory of Hydroscience and Engineering Tsinghua University Beijing 100084 China [b]Prof. State Key Laboratory of Hydroscience and Engineering Tsinghua University Beijing 100084 China Tel: 86-10-62781748 Fax: 86-10-62772463 [c]Prof. and Canada Research Chair Environmental Systems Engineering Program Faculty of Engineering University of Regina Regina Sask S4S 0A2 Canada

A vegetation-erosion model was developed to assess the extent of soil erosion and development trend of vegetation in the context of existing and contemplated vegetation-based soil erosion controls under different climatic, topographical and soil conditions. The model recognizes four vegetation-mediated soil erosion states: (i) an expanding vegetation coverage coupled with reduced erosion (C), (ii) a deteriorating vegetation coverage coupled with increased erosion (A), (iii) two transitional states between A and C, one with increasing erosion and vegetation coverage (B) and the other with decreasing erosion and vegetation coverage (D). With the model, the vegetation-erosion state of any particular area can be quantitatively described, by way of a vegetation-erosion chart, for varying climate, soil and topographic conditions, as demonstrated for the Xishan region, the East River basin, the Wangjiagou and Anjiagou watersheds (Loess Plateau), and the Xiaojiang watersheds (hot and dry valleys in the upper Yangtze River basin) in China. This paper presents the principles and results of area-specific investigations that track the fractions of the areas covered by vegetation and experiencing soil erosion (with soil loss determined in t/km2yr). This is done within the context of local soil erosion control initiatives via re-vegetation efforts, or the lack thereof, over the course of 30 years. The effectiveness of reforestation and erosion-control measures vary under different climatic, topographical and soil conditions. The vegetation may be quickly restored in the hot and wet East River basin but is very difficult on the dry and cold Loess Plateau. In the hot and dry valleys the vegetation can be restored if erosion is controlled and intensive reforestations for small watersheds are performed.

关键词： Soil erosion Vegetation coverage Loess Plateau Vegetation-erosion chart Reforestation

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Editorial

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Journal of Scheduling 2006年第3期9卷 199-201页

作者： Bard, Jonathan F. Barnhart, Cynthia Graduate Program in Operations Research The University of Texas Austin USA Civil & Environmental Engineering and Engineering Systems Massachusetts Institute of Technology Cambridge USA

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A robust risk analysis method for water resources allocation under uncertainty

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Stochastic environmental Research and Risk Assessment 2013年第3期27卷 713-723页

作者： Chen, C. Huang, G.H. Li, Y.P. Zhou, Y. MOE Key Laboratory of Regional Energy Systems Optimization Sino-Canada Energy and Environmental Research Academy North China Electric Power University Beijing 102206 China MOE Key Laboratory of Regional Energy Systems Optimization Resources and Environmental Research Academy North China Electric Power University Beijing 102206 China Advanced Manufacture and Processing System Program Faculty of Engineering University of Regina Regina SK S4S 0A2 Canada

A robust risk analysis method (RRAM) is developed for water resource decision making under uncertainty. This method incorporates interval-parameter programming and robust optimization within a stochastic programming framework. In the RRAM formulation, penalties are exercised with the recourse against any infeasibility, and robustness measures are introduced to examine the variability of the second stage costs which are above the expected levels. In this study, a number of weighting levels are considered which correspond to the robustness levels of risk control. Generally, a plan with a higher robust level would better resist from system risk. Thus, decision with a lower robust level can correspond to a higher risk of system failure. There is a tradeoff between system cost and system reliability. The RRAM is applied to a case of water resource management. The modeling results can help generate desired decision alternatives that will be particularly useful for risk-aversive decision makers in handling high-variability conditions. The results provide opportunities to managers to make decisions based on their own preferences on system stability and economy, and ensure that the management policies and plans be made with reasonable consideration of both system cost and risk. © 2012 Springer-Verlag.

关键词： Decision making

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Modeling an optimal temperature field in a thermoplastic medium

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Journal of Mathematical Sciences 2001年第2期107卷 3719-3721页

作者： Gryshchenko, O.Y. Potapenko, L.I. Stelya, O.B. Department of Mechanical Engineering University of Hawaii at Manoa Honolulu HI 96822 United States Department of Biology Arts-Sciences Faculty Gazi University 06500 Ankara Turkey Environmental Systems Engineering Program Faculty of Engineering University of Regina Regina S4S 0A2 Sask Canada

We consider the problem of constructing an optimal temperature field in a medium with the use of thin films of polymeric semiconductors when visualizing a hidden image. © 2001 Plenum Publishing Corporation.

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Author Correction: Australian water quality trends over two decades show deterioration in the Great Barrier Reef region and recovery in the Murray-Darling Basin

Communications Earth & Environment

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Communications Earth & Environment 2025年第1期6卷 1页

作者： Danlu Guo Qian Zhang Camille Minaudo Rémi Dupas Clément Duvert Shuci Liu Kefeng Zhang Ulrike Bende-Michl Anna Lintern School of Engineering College of Systems & Society The Australian National University Canberra ACT Australia Institute for Water Futures The Australian National University Canberra ACT Australia University of Maryland Center for Environmental Science Annapolis MD USA U.S. Environmental Protection Agency Chesapeake Bay Program Office Annapolis MD USA Department of Evolutionary Biology Ecology and Environmental Sciences University of Barcelona Barcelona Spain INRAE L’Institut Agro UMR SAS Rennes France Research Institute for the Environment and Livelihoods Charles Darwin University Darwin NT Australia National Centre for Groundwater Research and Training (NCGRT) Adelaide SA Australia Department of Environment Science and Innovation Queensland Government Brisbane QLD Australia Water Research Centre School of Civil and Environmental Engineering UNSW Sydney Sydney NSW Australia Science and Innovation Group – Hydrology Research Bureau of Meteorology Canberra ACT Australia Department of Infrastructure Engineering The University of Melbourne Melbourne VIC Australia Department of Civil Engineering Monash University Melbourne VIC Australia

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