bluuebunny/crossref_metadata_2025_split huggingface dataset:
Production capacity and mining plan optimization of fault/fracture‐controlled EGS model in Gonghe Basin
Authors: Zhang Jie , Xie Jingxuan , Zhang Han 
Published: October 2019

AbstractTaking full advantage of geological conditions is beneficial to reduce the development cost and enhance the exploit of geothermal energy in the Gonghe Basin. In this paper, a thermal‐hydraulic coupled model is put forward to study the heat extraction for Gonghe Basin based on local thermal nonequilibrium theory considering the natural fault. An excellent heat recovery system and reasonable combination of parameters are the premise of sustainable geothermal development. Two doublet systems are introduced to investigate the efficiency of the fault/fracture‐controlled EGS model. A comparative analysis is performed from the aspect of production temperature, heat extraction ratio, flow impedance, injection pressure, thermal power, and electric power. Key parameters (injection rate, injection temperature, production pressure, number of fractures, vertical interval between the two storages, and the storage permeability) are discussed. The results show that the fault‐fracture–controlled doublet model is more suitable for EGS to heat transfer than the common doublet model. The doublet model at a depth of 3300‐3800 m has a temperature gradient of 0.04°C/m. For fault‐fracture–controlled EGS model, the optimal values are 50 kg/s, 15 MPa, 60°C, 310 m, 4 × 10−14 m2, and two for injection rate, production pressure and injection temperature, vertical interval, storage permeability, and fracture number, respectively. The best well pattern layout method for the Gonghe Basin is one injection well and two production wells. The production temperature varies from 196.8°C to 192.7°C when the heat extraction ratio is 0.13 at the end of the operation. Thus, the fault‐fracture–controlled EGS model can provide a mining method and advance the development of geothermal energy for the Gonghe Basin in the future.
Collaboration strategy and optimization model of wind farm‐hybrid energy storage system for mitigating wind curtailment
Authors: Liu Jicheng , Wei Qiushuang , Huang Junjie , Zhou Weidong , Yu Jing 
Published: October 2019

AbstractOver the past years, wind energy has been considered as a promising solution for clean and sustainable energy development, but wind curtailment remains a challenge to wind power development. On this basis, utilization of non‐grid‐connected wind power becomes crucial and necessary as it can mitigate wind curtailment and improve energy efficiency. This paper proposes the collaboration strategy and optimization model of wind farm‐hybrid energy storage system (WF‐HESS) for non‐grid‐connected wind power based on battery and superconducting magnetic energy storage (SMES) whose combination can effectively cope with fluctuation and intermittence of wind input. The optimization problem is simultaneously investigated by the minimization of total cost, wind curtailment magnitude, and loss of power supply probability (LPSP). The multi‐objective particle swarm optimization (MOPSO) is introduced to find available solutions, and Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) is applied to determine the optimal one. Results are obtained for a case study, and the effectiveness and the feasibility of proposed model are verified by a comparative analysis and a sensitivity analysis. Results analysis and discussion show that the WF‐HESS model and the application of HESS have important influence on promoting utilization of non‐grid‐connected wind power and mitigating wind curtailment.
Soil conditioning in EPB shield tunnelling – An overview of laboratory tests
Authors: Peila Daniele , Martinelli Daniele , Todaro Carmine , Luciani Andrea 
Published: October 2019

AbstractThe application of full‐face mechanized tunnelling, mainly with EPB shielded machines, has widely increased in the last years and today it can be considered the key technology when tunnelling in soils above and below the water table. The applicability range of EPB machines has widened thanks on one side to the technological and mechanical progresses and on the other side to the quality and effectiveness of the conditioning products. No recognized standards are available for laboratory testing of conditioned soil and each research centre has developed its own procedures and methods. In this paper, an overview of the most frequently used procedures is presented and discussed briefly.
Corrosion damage to cantilever MR walls – Representation in tests and calculations
Authors: Rebhan Matthias J. , Marte Roman , Vorwagner Alois , Tschuchnigg Franz , Kwapisz Maciej 
Published: October 2019

AbstractAfter the failure of a cantilever retaining wall with counterfort on the Brenner Autobahn, intensive investigation of existing structures showed considerable corrosion damage to cantilever walls with and without counterforts, at the location of construction and day joints. This is difficult to detect and assess due to the placing of the main reinforcement at the back of the construction. The present paper presents a monitoring concept, which enables detection of corrosion damage and also provides a gain of information about the behaviour of the structure. The basis for this concept is the installation of inclination and strain gauges on the front of a retaining wall. In order to explain the functioning of the concept, a rudimentary cantilever model of the effect of corrosion damage is first described. Then the results and findings from a test series with artificial corrosion representation to reinforced concrete structures to validate the presented monitoring concept is described.
Modern urban tunnelling – Responding to social needs
Authors: Zeidler Kurt , Gall Vojtech 
Published: October 2019

AbstractUrban Tunnelling requires handling of a wide range of ground conditions and multiple challenges generated by work access constraints, settlement sensitive structures, as well as testing socio economic needs such as limitations to noise and dust emissions as well as impact on traffic. Such projects and their bespoke technical solutions come at a price. The realisation of large‐scale urban infrastructure projects is often accompanied by intensive discussions about the cost in support of the social need for such projects. This article provides socio‐economic reasoning for major urban infrastructure projects and insight in selected technical solutions that are required to realise these projects in urban settings.
The Brenner Base Tunnel – geological, construction and logistical challenges and innovations at half time
Authors: Bergmeister Konrad 
Published: October 2019

AbstractThe Brenner Base Tunnel with a total of 230 km of tunnels is a geological, structural and logistical challenge. The transnational project is an additional challenge, considering different planning, approval and construction rules and cultures. From the start of construction in 2007 to the present, today halftime is reached with 100 excavated tunnel kilometers. An overview of selected topics is given in this contribution, such as project optimizations of the emergency areas, geological/geotechnical knowledge transfer from the already driven exploratory tunnel to the following construction lots of the parallel main tunnels, reprocessing and use of Schists as aggregates for the inner lining and shotcrete production, logistics experience with wheel‐bound transport vehicles, measurements during construction with laser tunnel scanners and the service life of the tunnel of 200 years with an increased safety concept defined in the guide conceptual design. Preparations and planning are already at an advanced state for the second half of the project, concerning the next excavation lots, secondary linings as well as interior work with the installation of the technical equipment. The construction work is expected to be completed in 2025 and the end of construction is expected at the end of 2028 (2030 in case of risk occurrence).
Analyses of TBM disc cutter forces – application possibilities
Authors: Cordes Tobias , Schneider‐Muntau Barbara , Reinhold Chris , Grüllich Sebastian , Himmelsbach Christian , Wehrmeyer Gerhard 
Published: October 2019

AbstractForecasts made during tunnelling of the daily advance, to control the machine, specify the lining and verify system behaviour are of great importance for safety and for the success of the whole project. In practice, such forecasts are obtained in deep tunnels by probe drilling, leading to downtime periods and by analog/digital face documentation with shorter downtime periods. Measurement and evaluation of rock mass cutting at the cutterhead of the TBM enables continuous monitoring without downtime. From the spatial distribution of the disc forces, basic geological/geotechnical information about the tunnel face can be derived. In addition, this data is valuable for load monitoring and monitoring the condition of the discs to determine the optimal changing time. This contribution deals with a geological‐geotechnical interpretation of the disc forces of the open TBM on contract H33 Tulfes‐Pfons of the Brenner Base Tunnel. The spatially distributed disc forces are evaluated and compared with the geological documentation.
Nitrification in the presence of sulfide and organic matter in a sequencing moving bed biofilm reactor (SMBBR) with zeolite as biomass carrier
Authors: Huiliñir Cesar , Fuentes Vivian , Esposito Giovanni , Montalvo Silvio , Guerrero Lorna 
Published: October 2019

AbstractBACKGROUNDThe biological nitrification process is inhibited in the presence of sulfide and organic matter (OM). The use of immobilized biomass on inert carriers may help to decrease this inhibition. Thus, the main goal of the present work was to develop a sequencing moving bed biofilm reactor (SMBBR) using zeolite as biomass carrier and to determine its performance in presence of sulfide and OM.RESULTSThe use of zeolite as biomass carrier improves both the total ammonia nitrogen (TAN) oxidation and nitrate accumulation, allowing the system to be able to treat higher nitrogen loading rates. The SMBBR with zeolite in presence of sulfide and OM performed nitrification better than a sequencing batch reactor (SBR), by keeping the TAN and chemical oxygen demand (COD) removal efficiency at >90% for both inhibitory conditions. The SMBBR also is able to degrade COD by ≤98%. Finally, biomass with zeolite settled faster than biomass without zeolite, improving the sludge volume index (SVI) by 53.8%.CONCLUSIONSIt was possible to develop a SMBBR system using zeolite as biomass carrier. The SMBBR could maintain a nitrifying system under inhibitory conditions, allowing efficiencies of TAN and COD removal as high as 90%. © 2019 Society of Chemical Industry
Effective removal of aqueous glyphosate using CuFe2O4@biochar derived from phragmites
Authors: Jia Dongmei , Liu Min , Xia Jiangbao , Li Changhai 
Published: October 2019

AbstractBACKGROUNDThe excess use of glyphosate in both agricultural and nonagricultural areas has led to tremendous health (e.g. cardiac and respiratory impacts) and environmental concerns worldwide. There is an urgent need to find efficient ways to remove glyphosate residue from the aqueous environment.RESULTSHerein, an effective method for the removal of aqueous glyphosate is developed by employing nano‐CuFe2O4 modified biochar (BC) as an adsorbent. The CuFe2O4@BC adsorbents were prepared through hydrolyzing phragmite powders at 500 °C, followed by a simple coprecipitation method. The influence of initial glyphosate concentration, temperature, pH, time and coexisting species on the adsorption behavior of CuFe2O4@BC to glyphosate were fully examined.CONCLUSIONIt was found that the adsorption of glyphosate onto CuFe2O4@BC is highly dependent on the initial glyphosate concentration, pH and temperature, as well as coexisting species. The Freundlich and Langmuir models fitted the equilibrium isotherm data well, indicating the presence of both physisorption and chemisorption. In addition, the adsorption kinetic is well described by the pseudo‐second‐order kinetic model, which indicated that chemical adsorption may dominate the adsorption process. The CuFe2O4@BC adsorption of glyphosate presented a maximum adsorption capacity of 269.4 mg g−1 within 240 min, under 600 mg L−1 of glyphosate solution at 298 K and pH 4; this performance exceeds all other biochar‐derived adsorbents for the removal of aqueous glyphosate encountered in the open literature. Such a cost‐effective, high‐performance adsorbent shows a great potential for the removal of aqueous glyphosate in industry. © 2019 Society of Chemical Industry
Pacific and Atlantic multidecadal variability relations to the El Niño events and their effects on the South American rainfall
Authors: Kayano Mary T. , Andreoli Rita V. , de Souza Rodrigo A. F. 
Published: October 2019

AbstractThis paper examines the oceanic mean states associated with the Pacific decadal oscillation (PDO) and the Atlantic multidecadal oscillation (AMO) and their relations to the El Niño (EN). The mean states refer to the simultaneous occurrences of warm (W) and cold (C) phases of these oscillations: WAMO/CPDO, CAMO/WPDO and CAMO/CPDO. In general, the sea surface temperature (SST) anomaly patterns of the mean states show a combination of the PDO and AMO related anomaly patterns in the Pacific Ocean, and the strongest AMO‐related anomaly signals in the Atlantic Ocean with almost antisymmetric SST anomaly patterns in the northern and southern extratropical sectors of this Ocean. One of the most important results of this paper concerns the contrasting features between the CAMO/WPDO and the WAMO/CPDO mean states, which are noticeable for the SST, zonal circulation cell and precipitation during the austral autumn. Besides the opposite inter‐basin equatorial Atlantic/eastern equatorial Pacific cells, the CAMO/WPDO and WAMO/CPDO mean states also feature, respectively, a weakened and strengthened Walker cell in the tropical Pacific during the austral autumn. The results here indicate that the inter‐basin east–west cell between the equatorial Atlantic and eastern Pacific contributes to strengthen (weaken) the Walker cell during the austral autumn of the WAMO/CPDO (CAMO/WPDO) mean state. We also found that the mean states alter the EN features. The EN‐related largest positive SST anomalies occur in the central tropical Pacific during the WAMO/CPDO, and in the eastern tropical Pacific during the CAMO/WPDO. The Atlantic and Pacific oceanic mean states play an important role in modulating the EN features and their effects on the South American rainfall. The results presented in this paper might be relevant for climate monitoring and modelling studies.
The roles of moisture transports in intraseasonal precipitation during the preflood season over South China
Authors: Chu Qu‐cheng , Wang Qi‐guang , Feng Guo‐lin 
Published: October 2019

AbstractThe roles of moisture sources and transport in intraseasonal precipitation variabilities during the preflood season over South China are complex and different. In this paper, ERA‐Interim reanalysis data that were collected four times daily from 1979 to 2017 are used to analyse the variation and influence of moisture transport in intraseasonal precipitation during the preflood season over South China. Using the Hybrid Single‐Particle Lagrangian Integrated Trajectory model, fixed atmospheric moisture sources are defined: land area source (LD source), Indian Ocean source (IO source), Pacific Ocean source (PO source), South China Sea source (SCS source), and South China source (SC source). Sea source moisture transport accounts for more than 75% of the total precipitation during the preflood season, which is the most important moisture source in South China. For April, southeasterly moisture transport, which includes PO source and SCS source moisture transports, is the major moisture transport over South China. Then, the IO source and SCS source precipitation increased significantly during May. During June, the IO source precipitation accounted for 43.75% of the total precipitation, thus dominating precipitation over South China. In addition, there is a significant difference in the interdecadal variation in the preflood season precipitation before and after the Indian summer monsoon onset. Before the Indian summer monsoon onset, the land‐sea thermal contrast decreased, which led to a significant interdecadal reduction in the IO source, PO source, and SCS source moisture transports. After the Indian summer monsoon onset, the increase in IO source moisture transport is the primary cause of the interdecadal increase in precipitation over South China.
Evaluation of summer precipitation over Far East Asia and South Korea simulated by multiple regional climate models
Authors: Park Changyong , Cha Dong‐Hyun , Kim Gayoung , Lee Gil , Lee Dong‐Kyou , Suh Myoung‐Seok , Hong Song‐You , Ahn Joong‐Bae , Min Seung‐Ki 
Published: October 2019

AbstractThe evaluation of climate model performance is necessary to enhance the reliability of available models. Recently, the interest in the added value has been increasing due to the continued enhancement of the horizontal model resolution for dynamical downscaling. We have examined the simulation performance of regional climate models (RCMs) forced by two global climate models (GCMs) for summer precipitation over Far East Asia and South Korea on the basis of spatial resolution improvement. In terms of model resolution, coarse‐resolution RCMs present limitations, whilst high‐resolution RCMs offer the added value as revealed by several performance evaluations. RCMs forced by HadGEM2‐AO estimated smaller summer precipitation over South Korea than those observed, whereas RCMs forced by MPI‐ESM‐LR presented a wet bias. Here, moderate‐heavy rain in RCMs forced by HadGEM2‐AO and light‐moderate rain in RCMs forced by MPI‐ESM‐LR were found to lead to dry and wet biases, respectively.
Short‐term effects of hyaluronic acid on the subgingival microbiome in peri‐implantitis: A randomized controlled clinical trial
Authors: Soriano‐Lerma Ana , Magán‐Fernández Antonio , Gijón Juan , Sánchez‐Fernández Elena , Soriano Miguel , García‐Salcedo José A. , Mesa Francisco 
Published: October 2019

AbstractBackgroundThe aim of our study was to evaluate the effects of a hyaluronic acid (HA) gel at 45 days on the microbiome of implants with peri‐implantitis with at least 1 year of loading.MethodsA randomized controlled trial was conducted in peri‐implantitis patients. Swabs containing the samples were collected both at baseline and after 45 days of treatment. 16S rRNA sequencing techniques were used to investigate the effect of HA gel on the subgingival microbiome.ResultsOne hundred and eight samples of 54 patients were analyzed at baseline and after follow‐up at 45 days. Three strata with different microbial composition were obtained in the samples at baseline, representing three main microbial consortia associated with peri‐implantitis. Stratum 1 did not show any difference for any variable after treatment with HA, whereas in stratum 2, Streptococcus, Veillonella, Rothia, and Granulicatella did decrease (P < 0.05). Similarly, Prevotella and Campylobacter (P < 0.05) decreased in stratum 3 after treatment with HA. Microbial diversity was found to be decreased in stratum 3 (P < 0.05) after treatment with HA compared with the control group, in which an increase was found (P < 0.05).ConclusionsHA reduced the relative abundance of peri‐implantitis‐related microorganisms, especially the early colonizing bacteria, suggesting a specific action during the first stages in the development of the disease. HA did not alter relative abundances of non‐oral genera. The use of HA in advanced stages of peri‐implantitis resulted in a decrease in microbial alpha diversity, suggesting a protective action of the peri‐implant site against bacteria colonization.
Meptyldinocap and azoxystrobin residue behaviors in different ecosystems under open field conditions and distribution on processed cucumber
Authors: Bian Yanli , Guo Gang , Liu Fengmao , Chen Xiaochu , Wang Zongyi , Hou Tongyao 
Published: October 2019

AbstractBACKGROUNDSeveral diseases and insects may cause damage to the normal growth of cucumber. Azoxystrobin and meptyldinocap, because of their novel mode of action, are effective against pathogens that have developed reduced sensitivity to other fungicides. Azoxystrobin is persistent in various crops and environments. However, there is a lack of research on the dissipation of these two pesticides, especially meptyldinocap.RESULTSAnalytes could be quantified with decent recoveries of 90–101%, with relative standard deviations (RSDs) of 3.0–10.1%. The terminal residues of meptyldinocap and azoxystrobin in cucumber were all < limit of quantification (LOQ) (0.02 and 0.05 mg kg−1). The half‐lives of meptyldinocap and azoxystrobin were 0.8–1.1 and 1.2–2.8 days, respectively. The processing factors (PFs) for washing were all < 1, but the removal rate for washing was < 29.0%. Peeling had a significant effect on the removal of pesticide. The largest residue reductions were noticed through the pickling process, but special care should be taken regarding residues in the pickling solution as pesticides could transfer to them from cucumber. A more interesting finding was that the degradation of two pesticides was accelerated by the addition of calcium oxide.CONCLUSIONPesticide residues on cucumber decreased after these processes. These results enable the health‐risks from dietary exposures to pesticide residues to be characterized. They enable maximum residue limits (MRLs) to be established for pesticide residues in food products. They also assist the optimization of food processing with regard to pesticide residue dissipation. © 2019 Society of Chemical Industry
Subscribe to Open: A practical approach for converting subscription journals to open access
Authors: Crow Raym , Gallagher Richard , Naim Kamran 
Published: October 2019

Key points
OA business models must be sustainable over the long term, and article processing charge payments do not work for all; Subscribe to Open (S2O) is proposed, and being tested, as an alternative model.
The S2O model motivates subscribers to participate through economic self‐interest, without reliance on institutional altruism or collective behaviour.
The S2O offer targets current subscribers, uses existing subscription systems, and recurs annually, allowing publishers to control risk and revert to conventional subscriptions if necessary.
An Annual Reviews pilot is currently testing the S2O model with five journals.
Influence of dissolved oxygen content on the bacteria‐induced ennoblement of stainless steels in seawater and its consequence on the localized corrosion risk
Authors: Trigodet Florian , Larché Nicolas , Morrison Hilary G. , Maignien Loïs , Thierry Dominique 
Published: October 2019

AbstractThe ennoblement of stainless steel (e.g., the increase of open circuit potential [OCP]) is associated with bacterial colonization. This increases the risk of localized corrosion as the critical pitting/crevice potential can be overcome, especially for lower grade stainless steel. In this study, we assessed the influence of dissolved oxygen content (DOC) on the crevice corrosion of duplex and super duplex stainless steels. In addition, we used DNA amplicon sequencing to identify the bacteria most likely associated with the ennoblement. Above approximately 100 parts per billion (ppb) of dissolved oxygen, the ennoblement of OCP was observed leading to an increased risk of localized corrosion. Below approximately 100 ppb of dissolved oxygen, no ennoblement occurred and the risk of localized corrosion was reduced. We identified certain hydrocarbon‐degrading bacteria whose presence correlated with the ennoblement of super duplex stainless steel at saturated DOC. The role of these bacteria is not clear yet, but their distribution indicates a possible involvement in stainless steel ennoblement in seawater.