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Effect of additives on mercury partitioning in wet-limestone flue-gas desulfurization

Clean Energy 2020年第2期4卷 132-141页

作者： Ida Masoomi Barna Heidel marc oliver schmid Gunter Scheffknecht Institute of Combustion and Power Plant Technology—IFK Department Fuels and Flue Gas CleaningUniversity of StuttgartPfaffenwaldring 23D-70569 StuttgartGermany Faculty Building service EnergyEnvironmentHochschule EsslingenUniversity of Applied ScienceFlandernstraße 101D-73732 EsslingenGermany

The wet-flue-gas desulfurization(FGD)process plays an important role in removing water-soluble flue-gas components such as sulphur dioxide(SO_(2))and oxidized mercury *** the reducing environment of the FGD,there is the possibility of re-emission of the already absorbed mercury(Hg)to the gas phase,which may be diminished by the utilization of specific *** this study,the effect of two different additives on Hg re-emission from the aqueous phase and Hg partitioning in gypsum and filtrate of a lab-scale wet-limestone FGD is ***,the behaviour of additives in the presence of different halides is *** studied additives are TMT 15■as a sulphidic precipitating agent,which forms non-soluble mercury compounds,and activated lignite(AL)as a carbon-based sorbent,which adsorbs Hg compounds from the aqueous *** 15■has no significant effect on SO_(2) absorption;on the other hand,addition of AL improves the SO_(2)-removal efficiency by up to 30%.Using both additives,Hg re-emission is suppressed in all the experimented cases except for AL in the absence of halides,in which Hg re-emission shows no ***,the need to form nucleophilic oxidized mercury compounds in the slurry for the adsorption of oxidized mercury on AL can be *** of both additives improves Hg retention in the slurry to different *** is shown that,for the additive-free slurries,the Hg-adsorption capacity of the solid fraction of the slurry is the limiting ***,the utilization of both additives results in a significant increase in the Hg concentration of solid *** correlation between redox potential and partitioning of Hg in the slurry is presented by comparing the change in the redox potential of slurries when additives are used.

关键词： fossil energy flue-gas cleaning flue-gas desulfurization mercury additives

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Sulphite measurement and its influence on Hg behaviour in wet-limestone flue-gas desulphurization

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Clean Energy 2020年第4期4卷 360-371页

作者： Ida Masoomi Sophia Bruttel marc oliver schmid Günter Scheffknecht Univ.-Prof.Dr.techn.Günter Scheffknecht University of StuttgartInstitute of Combustion and Power Plant Technology—IFKPfaffenwaldring 23D-70569 StuttgartGermany

The most abundant and typical reducing agent for oxidized mercury in the slurry of wet flue-gas desulphurization(FGD)is the absorbed sulphur dioxide(SO_(2)),which is present as different species of bisulphite or sulphite,depending on the pH of the *** this study,two different measurement principles for continuous sulphite measurement in the slurry of lab-scale FGD were investigated to check their feasibility to be implemented in a wet *** first method is based on light absorbance at the characteristic wavelength of sulphite measurement using a spectrophotometer and,in the second method,sulphite is measured as sulphur dioxide using a gas *** addition,the correlation of sulphite concentration and mercury(Hg)in the slurry can be shown by measuring sulphite *** was concluded that using a spectrophotometer leads to distorted *** contrast,measuring sulphite as SO2 in the gas phase proved to be more *** implementation of the measurement technique in the lab-scale FGD showed promising results for sulphite ***,the correlation of Hg and sulphite concentration could be shown at different synthetic slurries containing different *** a slurry without halides demonstrated the ambivalent influence of sulphite in reactions involving Hg,in which sulphite acts as a ligand for Hg complexes as well as a reducing agent,depending on the existing ***,in the presence of halides,the role of sulphite was less significant.

关键词： flue-gas cleaning flue-gas desulphurization mercury re-emission sulphite measurement

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Growth and Photosynthesis Responses of a Super Dwarf Rice Genotype to Shade and Nitrogen Supply

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Rice science 2021年第2期28卷 178-190页

作者： marc SCHMIERER oliver KNOPF Folkard ASCH Institute of Agricultural Sciences in the Tropics University of HohenheimStuttgart 70599Germany Institute for Bio-and Geo-Sciences IBG-2:Plant SciencesForschungszentrum Jülich GmbHJülich 52428Germany

Specific aspects of plant cultivation require tests under fully controlled environmentalconditions with restricted energy supply, such as orbit-based space laboratories and low-light *** these growing conditions, super dwarf plants have been developed as model crops, and a gibberellindeficientSuper Dwarf Rice genotype was proposed as a model crop for space flight plant *** tested this genotype in a climate chamber experiment under different illumination and nitrogen supplylevels to assess its suitability under scenarios with limited resource availability. A 25% reduction inillumination led to a 75% reduction in yield, mainly due to a 60% reduction in formed tillers and 20%reduction in grain weight, and a 80% reduction in illumination caused total yield loss. Leaf area underreduced illumination was significantly lower, and only marginal changes in the dimensions of leaves wereobserved. Plant photosynthesis was not significantly different between control and 75% illumination. Thiswas explained by a higher photochemical efficiency under lower light conditions and a reduced mesophyllresistance. Therefore, we concluded that this genotype is well-suited for plant experiments under spaceand light-limited conditions since it kept its small stature and showed no shade avoidance mechanisms,such as leaf elongation, which would complicate experiments under low-light conditions. Nitrogenconcentrations of 2.8 and 1.4 mmol/L led to no differences in plant growth. We concluded that a nitrogenconcentration of 1.4 mmol/L is sufficient for this genotype under the light intensities.

关键词： super dwarf rice photosynthetic limitation analysis shade nitrogen

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Boosted Stacking Ensemble Machine Learning Method for Wafer Map Pattern Classification

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Computers, Materials & Continua 2023年第2期74卷 2945-2966页

作者： Jeonghoon Choi Dongjun Suh marc-oliver Otto Department of Convergence and Fusion System Engineering Kyungpook National UniversitySangju37224Korea Department of Mathematics Natural and Economic SciencesUlm University of Applied SciencesUlm89075Germany

Recently,machine learning-based technologies have been developed to automate the classification of wafer map defect patterns during *** existing approaches used in the wafer map pattern classification include directly learning the image through a convolution neural network and applying the ensemble method after extracting image *** study aims to classify wafer map defects more effectively and derive robust algorithms even for datasets with insufficient defect ***,the number of defects during the actual process may be ***,insufficient data are generated using convolutional auto-encoder(CAE),and the expanded data are verified using the evaluation technique of structural similarity index measure(SSIM).After extracting handcrafted features,a boosted stacking ensemble model that integrates the four base-level classifiers with the extreme gradient boosting classifier as a meta-level classifier is designed and built for training the model based on the expanded data for final *** the proposed algorithm shows better performance than those of existing ensemble classifiers even for insufficient defect patterns,the results of this study will contribute to improving the product quality and yield of the actual semiconductor manufacturing process.

关键词： Wafer map pattern classification machine learning boosted stacking ensemble semiconductor manufacturing processing

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Over-the-scope clip closure of two chronic fistulas after gastric band penetration

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World Journal of Gastroenterology 2010年第13期16卷 1665-1669页

作者： Federico Iacopini Nicola Di Lorenzo Fabrizio Altorio marc-oliver Schurr Agostino Scozzarro Gastroenterology and Endoscopy Unit Ospedale San Giuseppe Albano Laziale Department of Surgical Science Policlinico Università di Tor Vergata Steinbeis University Berlin IHCI-Institute

Gastrointestinal perforations are conservatively managed at endoscopy by through-the-scope endoclips and covered self expandable stents, according to the size and tissue features of the perforation. This is believed to be the first report of successful closure of two gastrocutaneous fistulas with over-the-scope clips (OTSCs). After laparoscopic gastric banding, a 45-year old woman presented with band erosion and penetration. Despite surgical band removal and gastric wall suturing, external drainage of enteric material persisted for 2 wk, and esophagogastroduodenoscopy demonstrated two adjacent 10-mm and 15-mm fistulous orifices at the esophagogastric junction. After cauterization of the margins, the 10-mm fistulous tract was grasped by the OTSC anchor, invaginated into the applicator cap, and closed by a traumatic OTSC. The other 15-mm fistula was too large to be firmly grasped, and a fully-covered metal stent was temporarily placed. No leak occurred during the following 6 wk. At stent removal: the OTSC was completely embedded in hyperplastic overgrowth; the 15-mm fistula significantly reduced in diameter, and it was closed by another traumatic OTSC. After the procedure, no external fistula recurred and both OTSCs were lost spontaneously after 4 wk. The use of the anchor and the OTSC seem highly effective for successful closure of small chronic perforations.

关键词： Gastrointestinal endoscopy Fistula Stent Esophagogastric junction

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Peritonitis and pneumoperitoneum after successful emergency pericardiocentesis in the case of a Chilaiditi syndrome

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Journal of Geriatric Cardiology 2019年第1期16卷 60-62页

作者： Michael Schulte-Hermes oliver Klein-Wiele marc Vorpahl Melchoir Seyfarth Department of Cardiology Pneumologand AngiologyUniversity of Witten/HerdeckeProsper Hospital.RecklinghausenMiihlenstrRecklinghausenGermany Department of Cardiology Katholisches Klinikum EssenPhilippusstiflHulsmannstrafteEssenGermany Department of Cardiology Helios University Hospital and University of Witten/HerdeckeWuppertalArrenbergerstrWuppertalGetmany

Pericardiocentesis is a common therapeutic procedure for pericardial tamponade due to pericardial effusion as well as a diagnostic procedure to obtain fluid for cytopathologic *** methods include ultrasound or fluoroscopic guidance,which generally result in high success rates(over 95%).[1,2].The complication rate of pericardiocentesis is low with reported incidences of l%-2%.[3]In the past,the most common indications for pericardiocentesis include uremia,tuberculous pericarditis or malignant pericardial ***,with the increasing number of catheter-based interventional cardiac procedures,iatrogenic pericardial effusions are becoming more frequent[4-6].

关键词： Bowel perforation Chilaiditi syndrome Pericardiocentesis Peri to nitis

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Valve-in-Valve Transcatheter Aortic Valve Replacement in a High-Risk Patient with a Biocor Bioprosthesis and a Flail Prosthetic Valve Leaflet

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Cardiovascular Innovations and Applications 2022年第1期6卷 191-194页

作者： oliver Abela Michael Schoeller Parker Williams Charles Lambert marc Bloom AdventHealth Tampa Pepin Heart Institute Cardiology3100 East Fletcher AvenueTampaFL 33613USA DeBusk College of Osteopathic Medicine Lincoln Memorial UniversityCardiology6965 Cumberland Gap ParkwayHarrogateTN 37752USA AdventHealth Tampa Pepin Heart Institute Cardiothoracic Surgery3100 East Fletcher AvenueTampaFL 33613USA

An 80-year-old woman with a history of surgical aortic valve replacement with a 21 mm *** Medical Biocor porcine aortic valve 14 years prior presented with New York Heart Association(NYHA)class III symptoms,severe aortic insufficiency from a degenerated prosthesis,and a large echocardiographic mobile mass representing a highly mobile prosthetic *** patient worsened to NYHA class IV symptoms despite medical *** So-ciety of Thoracic Surgery mortality risk score was extremely ***,a valve-in-valve transcatheter aortic valve replacement(TAVR)was found to be a reasonable *** used a 20 mm SAPIEN 3 Ultra valve(Edwards Lifesciences Inc.,Irvine,CA,USA)with a SENTINEL embolic protection device(Boston Scientific,Marlborough,MA,USA).During valve deployment,the echocardiographic mobile mass was visually pinned between the new TAVR valve and the surgical bioprosthetic *** large embolic debris was noted within the embolic protection device,and the patient remained without any new focal neurologic deficits in the perioperative period and at the 30-day *** severe aortic insufficiency resolved,and the patient clinically improved to NYHA class II symptoms.

关键词： Bioprosthetic TAVR Regurgitation

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未来气候变化对鄱阳湖区土地利用变化的影响评估

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资源科学 2013年第11期35卷 2255-2265页

作者：闫丹 Uwe A.Schneider Erwin schmid 黄河清潘理虎 oliver Dilly 中国科学院地理科学与资源研究所资源与环境地理信息系统国家重点实验室北京100101 中国科学院大学北京100049 Research unit Sustainability and Global Change Klima CampusUniversity of Hamburg Institute for Sustainable Economic Development University of Natural Resources and Life Sciences 太原科技大学计算机科学与技术学院太原030024 School of Integrated Climate System Sciences Klima Campus University of Hamburg

为了评估未来气候变化可能对鄱阳湖区土地利用变化产生的影响,本文根据IPCC的建议,利用新近建立的基于主体的土地利用变化模拟模型,详细分析了4种气候变化情景下鄱阳湖区1985-2035年的土地利用变化过程。这4种气候变化情景分别为A1B(经... 详细信息

为了评估未来气候变化可能对鄱阳湖区土地利用变化产生的影响,本文根据IPCC的建议,利用新近建立的基于主体的土地利用变化模拟模型,详细分析了4种气候变化情景下鄱阳湖区1985-2035年的土地利用变化过程。这4种气候变化情景分别为A1B(经济高速增长模式)、A2(区域经济多样化增长模式)、B1(引进更多清洁能源的经济增长模式)和情景4(无气候变化模式)。在这些气候变化情景中,由于耕地的农业生产潜力差异显著,农户主体的收入和他们对土地利用方式的决策也发生了相应的改变。通过对这一过程的模拟和结果分析,发现气候变化可能有利于鄱阳湖区土地利用变化向着环境友好的方向自我调整。与A1B和A2两种气候变化情景相比,B1情景对土地利用变化的影响更具环境友好性。

关键词：气候变化农业生产潜力土地利用变化 IPCC 鄱阳湖区

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Research and Practice of Flexibility in Distribution Systems:A Review

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CSEE Journal of Power and Energy Systems 2019年第3期5卷 285-294页

作者： Stefan Dalhues Yang Zhou oliver Pohl Florian Rewald Fabian Erlemeyer Dennis schmid Jannik Zwartscholten Zita Hagemann Christian Wagner Daniel Mayorga Gonzalez Hua Liu Mingmin Zhang Jiayan Liu Christian Rehtanz Yong Li Yijia Cao the TU Dortmund University Dortmund 44227Germany the College of Electrical and Information Engineering Hunan UniversityChangsha 410082China Changsha University of Science and Technology Changsha 410114China.

Flexibility in energy systems can support the operation of the electricity grid by providing active and reactive power to avoid voltage limit violations or *** distribution networks can provide this flexibility by implementing systems to control distributed generators,storage or ***,power flow controlling devices can be used to implement operational flexibility in the energy *** paper presents concepts for planning and forecasting of flexibility,monitoring of energy systems and control of flexibility from active distribution networks(ADNs)to enable the use of flexibility in future power systems.

关键词： Active distribution networks distributed generation power flow control

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欧洲主权债务问题

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新金融 2011年第10期 4-9页

作者：胡妍斌王辰 oliver Adler Giles Keating Daniel Davies Christine schmid William Porter Vaérie Plagnol Giovanni Zanni 瑞信私人银行研究部私人银行及资产管理研究部瑞信投资银行部瑞信私人银行部

次贷危机爆发之后、特别是雷曼破产后,各国政府推出了许多政策措施,目的在于重建市场信心,最明显的途径是向系统重要银行提供正式或非正式的担保。但当银行负债不得不成为政府的或有负债时,就会彻底改变市场对政府自身信用的评价。在希... 详细信息

次贷危机爆发之后、特别是雷曼破产后,各国政府推出了许多政策措施,目的在于重建市场信心,最明显的途径是向系统重要银行提供正式或非正式的担保。但当银行负债不得不成为政府的或有负债时,就会彻底改变市场对政府自身信用的评价。在希腊等体质较弱的欧洲外围国家,会把政府和银行一道带入恶性循环。不过,欧元的结构比通常理解的更为坚固,脱离欧元是一种代价昂贵的违约方式,相信这是最不可能发生的;相比之下,政府债务重组对经济的负面影响较小,因而更可能被采用。

关键词：国际金融主权债务金融危机银行业

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