|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | The Use of Ultrasonics in the Treatment of Waste Activated Sludge显示文摘The present paper reports on extensive investigations using an ultrasonic treatment of WAS, to study its po-tential to meet one or all of four objectives: (1) reduce WAS quantities; (2) achieve a better dewaterability; (3) provoke a release of COD from the biosolids, preferably transformed into biodegradable organics and (4) possibly destroy the fila-mentous micro-organisms responsible for sludge bulking. The experiments are carried out in a batch reactor of volume up to 2.3L. The ultrasonic apparatus consisted of a generator, a converter and a sonotrode, supplied by Alpha Ultrasonics under the brand name of Telsonic. Three different sludge kinds were tested, at approximate concentration (DS/WAS) be-tween 3.5 and 20g·L-1. The release of COD from the WAS-phase into the filtrate phase is a function of the specific en-ergy-input SE with yields of about 30% achievable at SE-values of 30000 kJ·kg-1. A major fraction of the COD is trans-formed into biodegradable organics (BOD). The reduction of DS-fraction of the sludge is equivalent to the COD-release rates. Although the dry solids content (DS) is reduced, the dewaterability of the sludge is not improved. This reflects itself in a slightly decreased dryness of the filter cake using vacuum filtration, and in increased values of the capillary suction time (CST). This more difficult dewaterability is the result of considerably reduced floc sizes, offering an extended sur-face area. More surface water is bound (CST increases) and the filterability decreases due to clogging of the cake. To reach the same dryness as the untreated cake, the required dosage of poly-electrolyte increases proportionally with the level of ultrasound energy supplied. The ultrasonic reduction of filamentous WAS organisms is not conclusive and very little effect is seen at low intensities and short treatment durations. Microscopic analysis of the WAS identified the domi-nant presence of Actynomyces. Especially the release of COD and its transformation into BOD certainly merit further re-search. | Raf Dewil Jan Baeyensa Rebecca Goutvrind | 2006 | Chinese Journal of Chemical Engineering2006，14，1： | 21 |
| 2 | Unnormalized and normalized forms of gefura measures in directed and undirected networks显示文摘In some networks nodes belong to predefined groups(e.g.,authors belong to institutions).Common network centrality measures do not take this structure into account.Gefura measures are designed as indicators of a node's brokerage role between such groups.They are defined as variants of betweenness centrality and consider to what extent a node belongs to shortest paths between nodes from different groups.In this article we make the following new contributions to their study:(1) We systematically study unnormalized gefura measures and show that,next to the ‘structural' normalization that has hitherto been applied,a ‘basic' normalization procedure is possible.While the former normalizes at the level of groups,the latter normalizes at the level of nodes.(2) Treating undirected networks as equivalent to symmetric directed networks,we expand the definition of gefura measures to the directed case.(3) It is shown how Brandes' algorithm for betweenness centrality can be adjusted to cover these cases. | Raf GUNS Ronald ROUSSEAU | 2015 | Frontiers of Information Technology & Electronic Engineering2015，16，4： | 6 |
| 3 | CFB cyclones at high temperature:Operational results and design assessment显示文摘Pressure drop and cut size measurements are reported for a full scale cyclone operating within a 58 MWth CFB-combustor unit at 775℃.The paper reviews the vast number of equations to calculate the pressure drop and separation efficiency of cyclones,generally for operation at ambient temperature and at low Cs <0.5 .None of the literature correlations predicts the pressure drop with a fair accuracy within the range of experimental operating conditions.The cut size d50 can be estimated using direct empirical methods or using the Stokes number,Stk50.Both methods were used to compare measured and predicted values of d50.With the exception of Muschelknautz and Krambrock,none of the equations made accurate predictions.Finally,an alternative method to determine the friction factor of the pressure drop equation(Euler number,Eu) and of the cut size is proposed.The Eu number is determined from the geometry of common cyclones,and the derived value of Stk50 defines more accurate cut sizes.The remaining discrepancy of less than 5%,when compared with the measured values,is tentatively explained in terms of a reduced cyclone diameter due to the solids layer formed near its wall.Further measurements,mostly using positron emission particle tracking,elucidate the particle motion in the cyclone and both tracking results and the influence of the particle movement on Eu and Stk50 will be discussed in a follow-up paper. | Raf Dewil Jan Baeyens Bart Caerts | 2008 | Particuology2008，6，3： | 5 |
| 4 | The Flemish Performance-based Research Funding System: A Unique Variant of the Norwegian Model显示文摘The BOF-key is the performance-based research funding system that is used in Flanders, Belgium. In this paper we describe the historical background of the system, its current design and organization, as well as its effects on the Flemish higher education landscape. The BOFkey in its current form relies on three bibliometric parameters: publications in Web of Science, citations in Web of Science, and publications in a comprehensive regional database for SSH publications. Taken together, the BOF-key forms a unique variant of the Norwegian model: while the system to a large extent relies on a commercial database, it avoids the problem of inadequate coverage of the SSH. Because the bibliometric parameters of the BOF-key are reused in other funding allocation schemes, their overall importance to the Flemish universities is substantial. | Tim C.E.Engels Raf Guns | 2018 | Journal of Data and Information Science2018，3，4： | 4 |
| 5 | Principles and potential of the anaerobic digestion of waste-activated sludge显示文摘 | Lise Appels Jan Baeyens Jan Degrève Raf Dewil | 2008 | Progress in Energy and Combustion Science2008，，6： | 4 |
| 6 | Advanced sludge treatment affects extracellular polymeric substances to improve activated sludge dewatering显示文摘 | Elisabeth Neyens Jan Baeyens Raf Dewil Bart De heyder | 2003 | Journal of Hazardous Materials2003，，2： | 3 |
| 7 | Decrease in uric acid in acute ischemic stroke correlates with stroke severity, evolution and outcome显示文摘 | Raf Brouns Annick Wauters Gerda Van De Vijver Didier De Surgeloose Rishi Sheorajpanday Peter P. De Deyn | 2010 | Clinical Chemistry and Laboratory Medicine2010，，3： | 3 |
| 8 | 概念视角下信息计量学的三个层面显示文摘简要回顾信息计量学研究内容的现行模型,并就模型的记录层面、社会层面、认知层面分别进行了讨论;在此基础上,讨论了每个层面内部以及层面之间的关系,并特别论述了引用关系的性质,研究了映射、距离远近以及影响等概念在该模型中的位置。 | Raf Guns 王岗 | 2014 | 图书馆理论与实践2014，，9： | 2 |
| 9 | Advanced sludge treatment affects extracellular polymeric substances to improve activated sludge dewatering显示文摘 | Elisabeth Neyens Jan Baeyens Raf Dewil Bart De heyder | 2003 | Journal of Hazardous Materials2003，，2： | 2 |
| 10 | Advanced sludge treatment affects extracellular polymeric substances to improve activeated sludge dewatering 显示文摘 | Elisabeth Neyens Jan Baeyen Raf Dewil | 2004 | J Hazard Mater2004，106，23： | 1 |
| 11 | Combined Morphologic and Karyotypic Study of 28 Myxoid Liposarcomas: Implications for a Revised Morphologic Typing (A Report from the CHAMP Group)显示文摘 | Giovanni Tallini Mans Akerman Paola Dal Cin Ivo DeWever Christopher D. M. Fletcher Nils Mandahl Fredrik Mertens Felix Mitelman Juan Rosai Anders Rydholm Raf Sciot Herman Van Den Berghe Wim Van Den Ven Roberta Vanni Helena Willen | 1996 | The American Journal of Surgical Pathology1996，，9： | 1 |
| 12 | Requirement of vascu-lar integrin α v β 3 for angiogenesis 显示文摘 | BROOKS PC CLARK RAF CHERESH DA | 1994 | Science1994，264，： | 1 |
| 13 | cDNA for β2-adrenergic receptor显示文摘 | Dixon RAF Frielle T | 1987 | Proc Nat Acad Sci1987，84，： | 1 |
| 14 | Randomized trial on endoscopic resection-cap versus multiband mucosectomy for piecemeal endoscopic resection of early Barrett’s neoplasia显示文摘 | Roos E. Pouw Frederike G.I. van Vilsteren Femke P. Peters Lorenza Alvarez Herrero Fiebo J.W. ten Kate Mike Visser Boudewijn E. Schenk Erik J. Schoon Frans T.M. Peters Martin Houben Raf Bisschops Bas L.A.M. Weusten Jacques J.G.H.M. Bergman | 2011 | Gastrointestinal Endoscopy2011，，： | 1 |
| 15 | False human hematopoietic cell lines: cross-contaminations and misinterpretations 显示文摘 | Drexler HG Dirks WG MacLeod RAF | 1999 | Leukemia1999，13，： | 1 |
| 16 | Biology of dermal wound repair显示文摘 | Clarrk RAF | 1993 | Dermatol Clin1993，11，： | 1 |
| 17 | Pathophysiology and Treatment of Functional Dyspepsia显示文摘 | Jan T Raf B Giovanni S | 2004 | Gastroenterology2004，127，： | 1 |
| 18 | External urban rela- tional process: introducing central flow theory to complement central place theory显示文摘 | Peter J Taylor Michael Hoyler Raf Verbruggen | 2010 | Urban Studies2010，47，13： | 1 |
| 19 | A hybrid approach for the ca-pacitated lot sizing problem with setup carryover显示文摘 | Hacer G G Semra T Raf J | 2012 | Interna-tional Journal of Production Research2012，50，6： | 1 |
| 20 | Genetics of autism spectrumdisorders显示文摘 | Kumar RAf Christian SL | 2009 | Curr Neurol Neurosci Rep2009，9，3： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员