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A new Digital Harmony Search algorithm for optimizing Pump Scheduling in Water Distribution Networks
IF 7.2 2区 环境科学与生态学
Water Research X Pub Date : 2024-12-31 DOI: 10.1016/j.wroa.2024.100300
Francesco De Paola , Francesco Pugliese , Nicola Fontana , Maurizio Giugni
{"title":"A new Digital Harmony Search algorithm for optimizing Pump Scheduling in Water Distribution Networks","authors":"Francesco De Paola ,&nbsp;Francesco Pugliese ,&nbsp;Nicola Fontana ,&nbsp;Maurizio Giugni","doi":"10.1016/j.wroa.2024.100300","DOIUrl":"10.1016/j.wroa.2024.100300","url":null,"abstract":"<div><div>Pumps in Water Distribution Networks (WDNs) adequately provide effective pressure where low elevation or high head losses are detected within the system. One of the most effective strategies to ensure economic sustainability is Pump Scheduling (PS), assuring the optimization of pump management and enabling significant energy cost saving. Meta-heuristic algorithms can be applied to Pump Scheduling, given their ability to provide reliable global solutions, further complemented by limited computational efforts. Nevertheless, they do not assure the achievement of the optimal global solution.</div><div>In this paper, the Pump Scheduling optimization was solved by applying a modified Harmony Search (HS) algorithm, aimed at optimizing the energy consumption and the maintenance costs of pumps, by limiting the number of daily switches. The EPANET 2.0 solver was employed for hydraulic simulations and novel setting equations and penalties were included to limit the number of feasible solutions. The model was tested on two benchmark water networks, showing its capability to return near-optimal solutions within a short computational time.</div></div>","PeriodicalId":52198,"journal":{"name":"Water Research X","volume":"27 ","pages":"Article 100300"},"PeriodicalIF":7.2,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11757763/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143048601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effectiveness of three machine learning models for prediction of daily streamflow and uncertainty assessment
IF 7.2 2区 环境科学与生态学
Water Research X Pub Date : 2024-12-28 DOI: 10.1016/j.wroa.2024.100297
Luka Vinokić , Milan Dotlić , Veljko Prodanović , Slobodan Kolaković , Slobodan P. Simonovic , Milan Stojković
{"title":"Effectiveness of three machine learning models for prediction of daily streamflow and uncertainty assessment","authors":"Luka Vinokić ,&nbsp;Milan Dotlić ,&nbsp;Veljko Prodanović ,&nbsp;Slobodan Kolaković ,&nbsp;Slobodan P. Simonovic ,&nbsp;Milan Stojković","doi":"10.1016/j.wroa.2024.100297","DOIUrl":"10.1016/j.wroa.2024.100297","url":null,"abstract":"<div><div>This study evaluates three Machine Learning (ML) models—Temporal Kolmogorov-Arnold Networks (TKAN), Long Short-Term Memory (LSTM), and Temporal Convolutional Networks (TCN)—focusing on their capabilities to improve prediction accuracy and efficiency in streamflow forecasting. We adopt a data-centric approach, utilizing large, validated datasets to train the models, and apply SHapley Additive exPlanations (SHAP) to enhance the interpretability and reliability of the ML models. The results show that TKAN outperforms LSTM but slightly lags behind TCN in streamflow forecasting. TKAN demonstrated strong alignment with observed statistical parameters, achieving a Mean Absolute Error (MAE) of 5.799 m³/s and a Nash-Sutcliffe Efficiency (NSE) of 0.958, compared to MAE and NSE values of 8.865 m³/s and 0.942 for LSTM, and 5.706 m³/s and 0.961 for TCN, respectively. Multi-step forecasting revealed TKAN's robust performance up to a three-day forecast horizon, with a slight decline in accuracy as the forecast period extended. Uncertainty analysis indicated reasonable variance levels, with a mean 3-day forecast uncertainty of 35.02% at a 95% confidence level for TKAN, compared to 39.95% for LSTM and 28.46% for TCN. For a 7-day forecast, TKAN showed a mean uncertainty of 40.97%, compared to 45.01% for LSTM and 36.22% for TCN. By enhancing model transparency and improving datasets, this study significantly advances the integration of machine learning into hydrological forecasting, offering robust methods for developing adaptive water management systems in response to changing climate conditions.</div></div>","PeriodicalId":52198,"journal":{"name":"Water Research X","volume":"27 ","pages":"Article 100297"},"PeriodicalIF":7.2,"publicationDate":"2024-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11764612/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143048541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Smaller sizes of polyethylene terephthalate microplastics mainly stimulate heterotrophic N2O production in aerobic granular sludge systems
IF 7.2 2区 环境科学与生态学
Water Research X Pub Date : 2024-12-27 DOI: 10.1016/j.wroa.2024.100299
Yingrui Liu , Yanying He , Qian Lu , Tingting Zhu , Yufen Wang , Yindong Tong , Yingxin Zhao , Bing-Jie Ni , Yiwen Liu
{"title":"Smaller sizes of polyethylene terephthalate microplastics mainly stimulate heterotrophic N2O production in aerobic granular sludge systems","authors":"Yingrui Liu ,&nbsp;Yanying He ,&nbsp;Qian Lu ,&nbsp;Tingting Zhu ,&nbsp;Yufen Wang ,&nbsp;Yindong Tong ,&nbsp;Yingxin Zhao ,&nbsp;Bing-Jie Ni ,&nbsp;Yiwen Liu","doi":"10.1016/j.wroa.2024.100299","DOIUrl":"10.1016/j.wroa.2024.100299","url":null,"abstract":"<div><div>Widespread polyethylene terephthalate microplastics (PET MPs) have played unintended role in nitrous oxide (N<sub>2</sub>O) turnovers (i.e., production and consumption) at wastewater treatment plants (WWTPs). Mainstream aerobic granular sludge (AGS) systems possess potentially strong N<sub>2</sub>O-sink capability, which may be reduced by PET MPs stress through altering N<sub>2</sub>O-contributing pathways, electron transfer, and microbial community structures. In this study, the effects of PET MPs with two common particle sizes of effluent from WWTPs (0.1 and 0.5 mm) on N<sub>2</sub>O turnovers, production pathways and N<sub>2</sub>O-sink capability were systematically disclosed in AGS systems by a series of biochemical tests and molecular biological means to achieve the goal of carbon neutrality. The results indicated that 0.1 mm PET MPs could more significantly stimulate N<sub>2</sub>O production in AGS systems by inhibiting denitrifying metabolism, compared with control and 0.5 mm PET MPs systems. Specifically, 0.1 mm PET MPs slightly increased the relative abundance of <em>Nitrosomonas</em>, reducing N<sub>2</sub>O yields via promoting the hydroxylamine (NH<sub>2</sub>OH) oxidation pathway during nitrification. Also, 0.1 mm PET MPs inhibited the electron transport system activities and the relative abundance of N<sub>2</sub>O reductase, hindering N<sub>2</sub>O reduction during denitrification. Most importantly, 0.1 mm PET MPs more apparently reduced the N<sub>2</sub>O-sink capability based on the ratio of N<sub>2</sub>O reductase gene and nitrite reductase gene.</div></div>","PeriodicalId":52198,"journal":{"name":"Water Research X","volume":"27 ","pages":"Article 100299"},"PeriodicalIF":7.2,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11758821/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143048544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Laboratory performance assessment of low-cost water level sensor for field monitoring in the tropics 用于热带地区野外监测的低成本水位传感器的实验室性能评估。
IF 7.2 2区 环境科学与生态学
Water Research X Pub Date : 2024-12-26 DOI: 10.1016/j.wroa.2024.100298
Ning Ding , Qingchuan Zhu , Frederic Cherqui , Nicolas Walcker , Jean-Luc Bertrand-Krajewski , Perrine Hamel
{"title":"Laboratory performance assessment of low-cost water level sensor for field monitoring in the tropics","authors":"Ning Ding ,&nbsp;Qingchuan Zhu ,&nbsp;Frederic Cherqui ,&nbsp;Nicolas Walcker ,&nbsp;Jean-Luc Bertrand-Krajewski ,&nbsp;Perrine Hamel","doi":"10.1016/j.wroa.2024.100298","DOIUrl":"10.1016/j.wroa.2024.100298","url":null,"abstract":"<div><div>As Water Sensitive Urban Design (WSUD) is a key strategy in integrated urban water management worldwide, there is a need for robust monitoring of WSUD systems. Being economical and flexible for operation and communication, low-cost sensor systems show great potential to mainstream digital water management. Yet, such systems are insufficiently tested, casting doubt on the reliability of their measurements. Here, we document a robust testing approach for a pressure transducer water level low-cost sensor (KIT0139) and a traditional sensor (OTT PLS) in both laboratory and field conditions. We tested six different devices under three temperatures relevant to tropical climate: 25, 30, 35 °C and proposed a field calibration approach. Results reveal that the low-cost sensors were robust as the six individual devices performed consistently under different testing conditions. After calibration, low-cost sensors provided sufficient accuracy (±10mm) and precision for water levels more than 0.05m. While varying water flow direction did not significantly influence the performance, we showed that calibration should be done for individual devices. In addition, large (&gt;5 °C) variations in water temperature and varying wet/dry conditions may also influence the performance of the low-cost sensors. The field calibration approach was validated in a 3-month experiment, confirming that this model of low-cost sensor can effectively replace traditional sensors in the field in tropical climates. Our study confirms that systematic and thorough testing is needed for low-cost sensors systems to realize their full potential for scientific-grade applications. We provide practical recommendations to conduct such testing from the laboratory to the field.</div></div>","PeriodicalId":52198,"journal":{"name":"Water Research X","volume":"27 ","pages":"Article 100298"},"PeriodicalIF":7.2,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11745960/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143016044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Continuous-flow phosphate removal using Cry-Ca-COS Monolith: Insights from dynamic adsorption modeling 使用Cry-Ca-COS整体石的连续流磷酸盐去除:来自动态吸附模型的见解。
IF 7.2 2区 环境科学与生态学
Water Research X Pub Date : 2024-12-13 DOI: 10.1016/j.wroa.2024.100296
Chanadda Phawachalotorn , Worawit Wongniramaikul , Satabodee Kaewnoo , Aree Choodum
{"title":"Continuous-flow phosphate removal using Cry-Ca-COS Monolith: Insights from dynamic adsorption modeling","authors":"Chanadda Phawachalotorn ,&nbsp;Worawit Wongniramaikul ,&nbsp;Satabodee Kaewnoo ,&nbsp;Aree Choodum","doi":"10.1016/j.wroa.2024.100296","DOIUrl":"10.1016/j.wroa.2024.100296","url":null,"abstract":"<div><div>This study rigorously evaluates the adsorption performance of the Cry-Ca-COS monolith for phosphate removal in a column operation mode. Characterization of the material both before and after exhaustion in a continuous flow system (column form) showed no difference compared to results from a batch system (tablet form). The XPS results indicated that the adsorption mechanism of phosphate on the Cry-Ca-COS column involved surface microprecipitation and ligand exchange (inner-sphere complexation). A systematic examination of key parameters revealed that higher column height, lower flow rate, and higher initial phosphate concentration favor increased phosphate adsorption in continuous mode. The application of the developed system to a real wastewater sample resulted in a satisfactory removal efficiency of 99.16 %, along with a concurrent reduction in total suspended solids (TSS) by 63.07 %. The adsorption data were analyzed using five dynamic adsorption models—Adam-Bohart, Wolborska, Thomas, Yoon-Nelson, and Yan—employing both linear and non-linear approaches. The non-linear models demonstrated a better fit with the experimental data, as indicated by higher correlation coefficients (<em>R</em>² = 0.9994 in the Yoon-Nelson model). An analysis of comprehensive errors was also conducted to assess the adequacy and precision of the model equations.</div></div>","PeriodicalId":52198,"journal":{"name":"Water Research X","volume":"27 ","pages":"Article 100296"},"PeriodicalIF":7.2,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11731986/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142985323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Making waves: Harnessing anammox bacteria coupled with dissimilatory nitrate reduction to ammonium for sustainable wastewater management 掀起波澜:利用厌氧氨氧化菌与异化硝酸还原到铵的可持续废水管理。
IF 7.2 2区 环境科学与生态学
Water Research X Pub Date : 2024-12-11 DOI: 10.1016/j.wroa.2024.100295
Yiyi Zhao , Min Zheng , Bing-Jie Ni , Shou-Qing Ni
{"title":"Making waves: Harnessing anammox bacteria coupled with dissimilatory nitrate reduction to ammonium for sustainable wastewater management","authors":"Yiyi Zhao ,&nbsp;Min Zheng ,&nbsp;Bing-Jie Ni ,&nbsp;Shou-Qing Ni","doi":"10.1016/j.wroa.2024.100295","DOIUrl":"10.1016/j.wroa.2024.100295","url":null,"abstract":"<div><div>Anaerobic ammonia oxidation (anammox) which converts nitrite and ammonium to dinitrogen gas is an energy-efficient nitrogen removal process. One of the bottlenecks for anammox application in wastewater treatment is the stable supply of nitrite for anammox bacteria. Dissimilatory nitrate reduction to ammonium (DNRA) is a process that converts nitrate to nitrite and then to ammonium. Significantly, it has been reported that some anammox bacteria can perform DNRA by reducing nitrate to nitrite and ammonium nitrogen with little low-molecular-weight organic acids such as volatile fatty acids. Here, we propose an innovative nitrogen removal process, i.e., nitrification and anammox coupled with partial DNRA (i.e., NPDA), and make a theoretical comparison with previously accepted partial nitrification and anammox (PNA) and partial denitrification and anammox (PdNA) for nitrogen removal. Under similar conditions of oxygen consumption, removal efficiency, external carbon source addition, and greenhouse gas emission, the novel NPDA process can better facilitate resource-effective and environment-friendly wastewater treatment. Thermodynamic analysis indicates that partial DNRA-anammox appears to be preferred, oxidizing per mole of NH<sub>4</sub><sup>+</sup>produces higher energy gain than that of conventional anammox alone. The carbon source limitation rather than nitrate limitation is the key to the realization of NPDA process. This perspective highlights the positive role of DNRA for sustainable wastewater management.</div></div>","PeriodicalId":52198,"journal":{"name":"Water Research X","volume":"27 ","pages":"Article 100295"},"PeriodicalIF":7.2,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11728893/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142980716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Emerging and legacy organophosphate flame retardants in the tropical estuarine food web: Do they exhibit similar bioaccumulation patterns, trophic partitioning and dietary exposure? 热带河口食物网中新出现的和遗留的有机磷阻燃剂:它们是否表现出类似的生物积累模式、营养分配和饮食暴露?
IF 7.2 2区 环境科学与生态学
Water Research X Pub Date : 2024-12-10 DOI: 10.1016/j.wroa.2024.100294
Qianyi Huang , Rui Hou , Yuchen Wang , Lang Lin , Hengxiang Li , Shan Liu , Xiangrong Xu , Kefu Yu , Xiaoping Huang
{"title":"Emerging and legacy organophosphate flame retardants in the tropical estuarine food web: Do they exhibit similar bioaccumulation patterns, trophic partitioning and dietary exposure?","authors":"Qianyi Huang ,&nbsp;Rui Hou ,&nbsp;Yuchen Wang ,&nbsp;Lang Lin ,&nbsp;Hengxiang Li ,&nbsp;Shan Liu ,&nbsp;Xiangrong Xu ,&nbsp;Kefu Yu ,&nbsp;Xiaoping Huang","doi":"10.1016/j.wroa.2024.100294","DOIUrl":"10.1016/j.wroa.2024.100294","url":null,"abstract":"<div><div>Emerging organophosphate flame retardants (E-OPFRs) are a new class of pollutants that have attracted increasing attention, but their bioaccumulation patterns and trophodynamic behaviors in aquatic food webs still need to be validated by comparison with legacy OPFRs (L-OPFRs). In this study, we simultaneously investigated the bioaccumulation, trophic transfer, and dietary exposure of 8 E-OPFRs and 10 L-OPFRs in a tropical estuarine food web from Hainan Island, China. Notably, the Σ<sub>10</sub>L-OPFRs concentration (16.1–1.18 × 10<sup>5</sup> lipid weight (lw)) was significantly greater than that of Σ<sub>8</sub>E-OPFRs (nondetectable (nd) - 2.82 × 10<sup>3</sup> ng/g lw) among the investigated organisms, and they both exhibited similar trends: fish&lt;mollusk&lt;crustacean. Significant biomagnification was found only for triphenyl phosphate (TPHP, an L-OPFR) with a trophic magnification factor (TMF) of 1.55, whereas other E- and L-OPFRs showed limited trophic transfer potential. Storage lipid was the dominant adsorption phase for most E-OPFRs and L-OPFRs on the basis of the fugacity approach. The water content controls the main trophic partitioning for the L-OPFRs of triethyl phosphate (TEP) and tris(2-chloroethyl) phosphate (TCEP) in the food web. Storage lipid and structure protein are equally important for 2,2-bis(chloromethyl)-propane-1,3-diyltetrakis(2-chloroethyl) biphosphate (V6, an emerging OPFR). The investigation of metabolites and the biotransformation rate (<em>K</em><sub>M</sub>) confirmed the role of biotransformation in offsetting trophic transfer for both legacy and emerging OPFRs. Furthermore, the hazard quotients (HQs) were found to be &lt;1 for South China residents for both the E- and L-OPFRs, but the health risks of these two kinds of OPFRs should be given sustained attention.</div></div>","PeriodicalId":52198,"journal":{"name":"Water Research X","volume":"27 ","pages":"Article 100294"},"PeriodicalIF":7.2,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11721218/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142973227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
High-level nitrogen removal achieved by Feammox-based autotrophic nitrogen conversion 基于feammox的自养氮转化实现了高水平的氮去除。
IF 7.2 2区 环境科学与生态学
Water Research X Pub Date : 2024-12-03 DOI: 10.1016/j.wroa.2024.100292
Xiaohui Cheng , Lanlan Hu , Tao Liu , Xiang Cheng , Jiyun Li , Kangning Xu , Min Zheng
{"title":"High-level nitrogen removal achieved by Feammox-based autotrophic nitrogen conversion","authors":"Xiaohui Cheng ,&nbsp;Lanlan Hu ,&nbsp;Tao Liu ,&nbsp;Xiang Cheng ,&nbsp;Jiyun Li ,&nbsp;Kangning Xu ,&nbsp;Min Zheng","doi":"10.1016/j.wroa.2024.100292","DOIUrl":"10.1016/j.wroa.2024.100292","url":null,"abstract":"<div><div>Anaerobic ammonium oxidation coupled with Fe(III) reduction (Feammox) is an essential process in the geochemical iron and nitrogen cycling. This study explores Feammox-based nitrogen removal in a continuous laboratory up-flow bioreactor stimulated by intermittently adding 5 mM Fe(OH)<sub>3</sub> at intervals of approximately two months. The feed was synthetic wastewater with a relatively low ammonium concentration (∼100 mg N/L), yet without organic carbon in order to test its autotrophic nitrogen removal performance. The operation of this system showed the achievement of high-level ammonium and total nitrogen removal efficiency (∼97% and ∼90% on average, respectively) within four months of operation, along with a relatively practical rate of ∼50 mg N/(L·d). The demand of Fe(Ⅲ) for ammonium removal during the whole bioreactor operation was estimated to be only 0.033, two orders of magnitude less than that calculated based on the Feammox reaction producing nitrogen gas. A series of assays on Fe(II) oxidation with different oxidants (O<sub>2</sub>, NO<sub>2</sub><sup>−</sup> and NO<sub>3</sub><sup>−</sup>) in abiotic and biotic batch tests further revealed an important role of Fe(II) oxidation processes, likely driven by microbial nitrate reduction and chemical oxygen reduction, in assisting the regeneration of Fe(III) for continuous Feammox-based nitrogen removal. This work demonstrates that Feammox-based autotrophic nitrogen conversion is a potential option for future wastewater treatment.</div></div>","PeriodicalId":52198,"journal":{"name":"Water Research X","volume":"27 ","pages":"Article 100292"},"PeriodicalIF":7.2,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11667699/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142900325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Teamwork without talking: distributed system estimates maintain approximately centralized control of smart urban drainage systems during communications outages 无需交谈的团队合作:分布式系统评估在通信中断期间保持对智能城市排水系统的大致集中控制
IF 7.2 2区 环境科学与生态学
Water Research X Pub Date : 2024-11-26 DOI: 10.1016/j.wroa.2024.100287
Travis Adrian Dantzer, Branko Kerkez
{"title":"Teamwork without talking: distributed system estimates maintain approximately centralized control of smart urban drainage systems during communications outages","authors":"Travis Adrian Dantzer,&nbsp;Branko Kerkez","doi":"10.1016/j.wroa.2024.100287","DOIUrl":"10.1016/j.wroa.2024.100287","url":null,"abstract":"<div><div>Real-time control of urban drainage systems (UDS) can reduce flood risk while enhancing water quality. However, internet-connected valves and weirs may become a liability during communications outages. Given that severe storms often cause both flooding and communications failures, it is critical that smart systems cope well with communications outages during these events. We propose a method to maintain approximately centralized predictive control of a UDS under intermittent communication by hosting approximations of the total system’s dynamics and states on each networked microcontroller. This allows individual microcontrollers to act from an imperfect understanding of the total system, even when they have not communicated with the central server for several days. We show robustness to communications outages; maintaining centralized control in this case study when reporting only once every 7 days on average. We also examine the role of relative position within the network in determining the accuracy of each microcontroller’s estimates of depths in the other storage basins. This investigation supports the idea that agents within a distributed control problem can make model-based inferences of total system conditions using their local measurements.</div></div>","PeriodicalId":52198,"journal":{"name":"Water Research X","volume":"26 ","pages":"Article 100287"},"PeriodicalIF":7.2,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An inconvenient impact: Unveiling the overlooked differences in crystalline forms of iron (hydro)oxides on anaerobic digestion 不便的影响:揭示被忽视的铁(氢)氧化物结晶形式对厌氧消化的差异
IF 7.2 2区 环境科学与生态学
Water Research X Pub Date : 2024-11-23 DOI: 10.1016/j.wroa.2024.100286
Han-Quan Wen , Guan-Lin Chen , Yu-Sheng Li , Tian Tian , Yuan Pan , Han-Qing Yu
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