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Modelling the bed characteristics in fluidised-beds for top-spray coating processes

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Particuology 2012年第6期10卷 649-662页

作者： Mike Vanderroost Frederik Ronsse Koen Dewettinck Jan G.pieters Department of Biosystems Engineering Ghent UniversityCoupure links 6539000 GhentBelgium Laboratory of Food Technology and Engineering Ghent UniversityCoupure links 6539000 GhentBelgium

A particle sub-model describing the bed characteristics of a bubbling fluidised bed is presented. Atomisation air, applied at high pressures via a nozzle positioned above the bed for spray formation, is incorporated in the model since its presence has a profound influence on the bed characteristics, though the spray itself is not yet considered. A particle sub-model is developed using well-known empirical relations for particle drag force, bubble growth and velocity and particle distribution above the fluidised-bed surface. Simple but effective assumptions and abstractions were made concerning bubble distribution, particle ejection at the bed surface and the behaviour of atomisation air flow upon impacting the surface of a bubbling fluidised bed, The model was shown to be capable of predicting the fluidised bed characteristics in terms of bed heights, voidage distributions and solids volume fractions with good accuracy in less than 5 min of calculation time on a regular desktop PC. It is therefore suitable for incorporation into general process control models aimed at dynamic control for process efficiency and product quality in top-spray fluidised bed coating processes.

关键词： Fluidised bed Modelling Voidage distribution Fluidised bed characteristics Multiphase flow Coating process

Bayesian network model to distinguish between intentional attacks and accidental technical failures:a case study of floodgates

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Cybersecurity 2021年第1期4卷 442-460页

作者： Sabarathinam Chockalingam wolter pieters AndréTeixeira Pieter van Gelder Faculty of Technology Policy and ManagementDelft University of TechnologyDelftThe Netherlands Department of Risk Safety and SecurityInstitute for Energy TechnologyHaldenNorway Behavioural Science Institute Radboud UniversityNijmegenThe Netherlands Department of Electrical Engineering Uppsala UniversityUppsalaSweden

water management infrastructures such as floodgates are critical and increasingly operated by Industrial Control Systems(ICS).These systems are becoming more connected to the internet,either directly or through the corporate *** makes them vulnerable to *** behaviour in floodgates operated by ICS could be caused by both(intentional)attacks and(accidental)technical *** operators notice abnormal behaviour,they should be able to distinguish between those two causes to take appropriate measures,because for example replacing a sensor in case of intentional incorrect sensor measurements would be ineffective and would not block corresponding the attack *** the previous work,we developed the attack-failure distinguisher framework for constructing Bayesian Network(BN)models to enable operators to distinguish between those two causes,including the knowledge elicitation method to construct the directed acyclic graph and conditional probability tables of BN *** a full case study of the attack-failure distinguisher framework,this paper presents a BN model constructed to distinguish between attacks and technical failures for the problem of incorrect sensor measurements in floodgates,addressing the problem of floodgate *** utilised experts who associate themselves with the safety and/or security community to construct the BN model and validate the qualitative part of constructed BN *** constructed BN model is usable in water management infrastructures to distinguish between intentional attacks and accidental technical failures in case of incorrect sensor *** could help to decide on appropriate response strategies and avoid further complications in case of incorrect sensor measurements.

关键词： Bayesian network DeMorgan model Intentional attack Probability elicitation Safety Security Technical failure water management

Anti-infective, cytotoxic and antioxidant activity of Ziziphus oxyphylla and Cedrela serrata

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Asian Pacific Journal of Tropical Biomedicine 2016年第8期6卷 671-676页

作者： Rizwan Ahmad Niyaz Ahmad Atta Abbas Naqvi Paul Cos Louis Maes Sandra Apers Nina Hermans Luc pieters Natural Products and Alternative Medicine College of Clinical Pharmacy University of Dammam Department of Pharmaceutics College of Clinical Pharmacy University of Dammam Department of Pharmacy Practice College of Clinical Pharmacy University of Dammam Faculty of Pharmaceutical Biomedical and Veterinary Sciences Laboratory of Microbiology Parasitology and Hygiene (LMPH) University of Antwerp Faculty of Pharmaceutical Biomedical and Veterinary Sciences Natural Products & Food–Research and Analysis (NatuRA)University of Antwerp

Objective: To search for the most active antimicrobial and antioxidant sub-fractions related to traditional use of Ziziphus oxyphylla(Z. oxyphylla) and Cedrela serrata(C. serrata) in Pakistan against infectious and liver ***: Factions of different polarity were tested in vitro for their antiprotozoal,antimalarial, antibacterial and antifungal activity against different pathogens. Cytotoxicity on MRC-5 cell lines(human lung fibroblasts) as well as, in vitro radical scavenging activity was evaluated using the 1, 1-diphenyl-2-picrylhydrazyl radical ***: The highest antiprotozoal activity was observed for the CHCl3 fractions of Z. oxyphylla roots and leaves, and C. serrata bark. The CHCl3 and Et OAc fractions of Z. oxyphylla roots, the CHCl3 fraction of Z. oxyphylla leaves, the Et OAc and the residual Me OH: H2 O fraction of C. serrata bark showed antibacterial activity against Staphylococcus aureus. The same residual Me OH: H2 O fraction of C. serrata bark was active against Candida albicans. The highest antioxidant activity was observed for the more hydrophilic Et OAc fractions of Z. oxyphylla leaves, C. serrata bark and leaves, and the residual Me OH: H2 O fraction of C. serrata ***: This study supports at least in part the traditional uses of these plants for antimicrobial purposes and against liver diseases.

关键词： Antifungal Antibacterial Antiprotozoal Cytotoxicity Antioxidant Ziziphus oxyphylla Cedrela serrata Rhamnaceae Meliaceae Pakistan

Spectral Compensation for Linear-Logarithmic Flow Cytometry Acquisitions

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Journal of Biomedical Science and Engineering 2014年第9期7卷 631-640页

作者： Nickolaas van Rodijnen Math pieters Marius Nap Atrium Medical Centre Heerlen The Netherlands

Compensating for fluorescence overlap in multiparameter flow cytometry datasets, of which one parameter is linear distributed and at least one parameter is logarithmic distributed, leads usually to extreme high compensation values. we investigated this phenomenon with an adapted flow cytometry model, of which the two parameters can easily be converted from linear to logarithmic and vice versa. with the adapted model, spectral compensation was performed both for linear-logarithmic and linear-linear parameter distribution. The results of the flow cytometry model were validated with a real world example which was also compensated twice. The results of the two experiments show that the compensation values equal to the theoretically expected value when both parameters are linear distributed. However, the compensation value exceeds 100% when one of the two parameters is logarithmic distributed. In addition, we found that spectral compensation of differently distributed parameters leads to deformation of the compensated events. with the adapted flow cytometry model presented in this paper it is shown how to correctly compensate flow cytometry acquisitions with different distributed parameters.

关键词： Flow Cytometry DNA Spectral Compensation

LHP1 Interacts with ATRX through Plant-Specific Domains at Specific Loci Targeted by PRC2

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Molecular Plant 2018年第8期11卷 1038-1052页

作者： Haifeng wang Danhua Jiang Elin Axelsson Zdravko J. Lorkovic Sean Montgomery Sarah Holec Bas J.G.E. pieters Abbas H.K. AI Temimi Jasmin Mecinovic Frederic Berger Gregor Mendel Institute (GMI) Austrian Academy of Sciences Vienna Biccenter (VBC) Dr. Bohr-Gasse 3 1030 Vienna Austria Temasek Lifesciences Laboratory 1 Research Link Nationat University of Singapore 117604 Singapore Singapore Department of Biological Sciences National University of Singapore 14 Science Drive 4 117543 Singapore Singapore Institute for Molecules and Materials Radboud University Heyendaalseweg 135 6525 AJ Nijmegen the Netherlands

Heterochromatin Protein 1 （HP1） is a major regulator of chromatin structure and function. In animals, the network of proteins interacting with HP1 is mainly associated with constitutive heterochromatin marked by H3K9me3. HP1 physically interacts with the putative ortholog of the SNF2 chromatin remodeler ATRX, which controls deposition of histone variant H3.3 in mammals. In this study, we show that the Arabidopsis thaliana ortholog of ATRX participates in H3.3 deposition and possesses specific conserved domains in plants. we found that plant Like HP1 （LHP1） protein interacts with ATRX through domains that evolved specifically in land plant ancestors. Loss of ATRX function in Arabidopsis affects the expression of a limited subset of genes controlled by PRC2 （POLYCOMB REPRESSIVE COMPLEX 2）, including the flowering time regulator FLC. The function of ATRX in regulation of flowering time requires novel LHPl-interacting domain and ATPase activity of the ATRX SNF2 helicase domain. Taken together, these results suggest that distinct evolutionary pathways led to the interaction between ATRX and HP1 in mammals and its counterpart LHP1 in plants, resulting in distinct modes of transcriptional regulation.

关键词： ATRX LHPI1 H3 variants Chromatin Histone Evolution

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森林中的光学反应

摄影之友 2015年第6期 88-89页

作者： Nelleke pieters

森林,看起来只是单调的颜色,但是深入其中的人才能感受到它的魅力。Nelleke pieters,独爱弱光下的森林,因为她觉得这是最接近大自然灵魂的时刻,或是薄雾朦胧,或是微光闪现,这是来自自然的一种恩赐,是不可复制的。

关键词：层次感纵深感

迈向纳米级芯片技术的IMEC研发——先进封装技术部分

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电子工业专用设备 2005年第5期34卷 29-32页

作者：高腾 Philip pieters 比利时IMEC微电子研发中心上海200031

近期、芯片制造工艺发展到了纳米时代(栅极宽度＜100 nm),IMEC发起并联合了全球七家主要半导体芯片制造商和几乎所有主要设备制造商,在刚建立起来的φ300mm硅片尺寸工艺中试线上,共同展开了45 nm和32 nm的芯片制造工艺的研究工作.

关键词：芯片技术纳米级术部封装研发设备制造商半导体芯片 300mm 纳米时代工艺发展芯片制造研究工作制造工艺栅极并联硅片

法国弹道导弹和欧洲运载火箭遥测的演变和展望

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国外导弹与航天运载器 1989年第9期 56-63页

作者： Bernard pieters 李伟范

本文介绍了法国弹道导弹和欧洲运载火箭用的遥测系统。简要回顾了遥测技术的发展历程并展望了今后的发展。文中还涉及到阿里安运载火箭的遥测问题。

关键词：遥测技术弹道导弹运载火箭

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K别墅德国图林根

世界建筑导报 2023年第6期38卷 94-97页

作者：无 pieters Kers(摄影) Patrick Voigt(摄影) 保罗·德·鲁特建筑师事务所不详

K别墅是保罗·德·鲁特建筑师事务所在德国的第一个项目。客户的愿望是设计一栋具可持续发展的别墅,离散却又融合于自然环境中。设计的结果是一个简单而创新的住宅,由玻璃、钢铁和混凝土构建而成。居住空间可持续住宅面朝南方,这也是起... 详细信息

K别墅是保罗·德·鲁特建筑师事务所在德国的第一个项目。客户的愿望是设计一栋具可持续发展的别墅,离散却又融合于自然环境中。设计的结果是一个简单而创新的住宅,由玻璃、钢铁和混凝土构建而成。居住空间可持续住宅面朝南方,这也是起居室、卧室所在之处。玻璃外立面从屋顶到地板上,划分出生活空间。连续的玻璃立面没有窗户和遮阳百叶窗,反映出天空并提供了山谷的迷人景色。

关键词：居住空间外立面建筑师事务所遮阳百叶别墅起居室自然环境图林根