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A minimalist approach for detecting sensor abnormality in oil and gas platforms

Petroleum Research 2022年第2期7卷 177-185页

作者： pauline wong w.K.wong Filbert H.Juwono Lenin Gopal Mohd Amaluddin Yusoff Curtin Malaysia Digital Innovation(CMDI) Curtin University Malaysia98009MiriSarawakMalaysia Department of Electrical and Computer Engineering Curtin University Malaysia98009MiriSarawakMalaysia

Compressors play an important role in day-to-day operation in most oil and gas platforms,especially in the case for maintaining gas pressure in transportation *** complex problem to detect the sensors health and abnormality as the sensor reading would reflect the various states of the *** ideal situation,sensor readings offer vast amounts of information on compressor health and could possibly indicate early fault of ***,due to harsh site and process operating conditions,sensors are often found to have drifted or failed,and there is no standard methodology to predict abnormality apart from applying emerging industrial smart sensor *** this paper,we investigate a minimalist approach for detecting abnormality of compressor's shaft's RPM *** the sensors in the compressor are correlated,we first use the outputs of other sensors to predict the shaft's RPM using regression-based models(neural networks and multiple linear regression).Second,we calculate the histogram of residuals by taking the difference between the predicted sensor value and the actual sensor value plus the abnormality in terms of bias/miscalibration and *** histogram of residuals can be used for sensor abnormality *** general,sensor states can be monitored by observing the shifting of the mean in the histogram of *** sensor readings contaminated with noise can be seen by a shifted mean whose value is between the normal condition mean and the biased condition *** method is compact and would be relevant to monitor irregularity of the sensors.

关键词： Sensor fault detection Multistage turbine air compressor Multiple linear regression Neural network Oil and gas industry

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Computation of Shock Profiles in Radiative Hydrodynamics

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Communications in Computational Physics 2009年第10期6卷 1118-1136页

作者： Jean-Francois Coulombel pauline Lafitte CNRS Laboratoire Paul Painleve and Project Team SIMPAF INRIA FutursUniversite Lille 1Cite Scientifique59655 VILLENEUVE D’ASCQ CedexFrance Laboratoire Paul Painleve and Project Team SIMPAF INRIA Futurs Universite Lille 1Cite Scientifique59655 VILLENEUVE D’ASCQ CedexFrance

This article is devoted to the construction of a numerical scheme to solve the equations of radiative *** use this numerical procedure to compute shock profiles and illustrate some earlier theoretical results about their smoothness and monotonicity *** first consider a scalar toy model,then we extend our analysis to a more realistic system for the radiative hydrodynamics that couples the Euler equations and an elliptic equation.

关键词： Radiative transfer shock profiles Euler equations numerical profiles

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Three decades of unveiling the complex chemistry of C-nitroso species with computational chemistry

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Organic Chemistry Frontiers 2022年第1期9卷 223-264页

作者： pauline Bianchi Jean-Christophe M.Monbaliu Center for Integrated Technology and Organic Synthesis MolSys Research UnitUniversity of LiègeB-4000 Liège(Sart Tilman)Belgium

C-Nitroso species are characterized by a unique nitrogen–oxygen combination located next to a carbon backbone,which confers them a unique ambiphilic and high reactivity towards nucleophilic,electrophilic but also radical *** this ambivalence can be seen as a strong asset for developing versatile synthetic aminohydroxylation and/or hydroxylamination processes mainly through nitroso Diels–Alder,nitroso ene,and nitrosoaldol reactions,it also contributes to complex optimization and rationalization arising from the many competitive pathways,that is,the occurrence of regioisomers and stereoisomers,as well as dimerization and tautomerization *** reactivity profiles are usually seen by synthetic organic chemists as major hurdles to overcome,despite the armada of analytical and purification methods available to them,and hence to achieve selective and exploitable developments of such *** rise of computational chemistry and resources has certainly changed their perspectives,since it provides a very different angle to gather insights on intrinsic properties,reactivity,and *** silico chemistry also provides a robust alternative to time and resource-consuming synthetic work and can therefore contribute to alleviate wasteful preparations by guiding the chemist toward the best combination of reagents to achieve high selectivity and *** synergistic combination of synthetic organic chemistry and computational chemistry,within the specific context of the complex chemistry of C-nitroso species,is discussed in this *** review aims at giving an overview of the molecular and chemical properties obtained through computational chemistry as an enabling support for the rationalization and optimization of reactions relying on ambiphilic C-nitroso species over the 3 last *** provides clear,concise,and illustrated guidelines for the synthetic chemist in search of inspiration through computations.

关键词： chemistry reactivity isomers

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Otitis media with effusion in children: Pathophysiology, diagnosis, and treatment.A review

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Journal of Otology 2019年第2期14卷 33-39页

作者： pauline Vanneste Cyril Page Department of Otorhinolaryngology and Head & Neck Surgery Amiens University Hospital

Otitis media with effusion(OME)is a frequent paediatric *** condition is often asymptomatic,and so can easily be ***,OME can lead to hearing loss that impairs the child's language and behavioural *** diagnosis is essentially clinical,and is based on otoscopy and(in some cases)*** endoscopy is only indicated in cases of unilateral OME or when obstructive adenoid hypertrophy is *** media with effusion is defined as the observation of middle-ear effusion at consultations three months *** must be evaluated(using an age-appropriate audiometry technique)before and after treatment,so as not to miss another underlying cause of deafness(*** deafness).Craniofacial dysmorphism,respiratory allergy and gastro-oesophageal reflux all favour the development of *** a certain number of medications(antibiotics,corticoids,antihistamines,mucokinetic agents,and nasal decongestants)can be used to treat OME,they are not reliably effective and rarely provide long-term *** benchmark treatment for OME is placement of tympanostomy tubes(TTs)and(in some cases)adjunct *** TTs rapidly normalize hearing and effectively prevent the development of cholesteatoma in the middle *** contrast,TTs do not prevent progression towards tympanic atrophy or a retraction *** enhances the effectiveness of *** children with adenoid hypertrophy,adenoidectomy is indicated before the age of 4 but can be performed later when OME is identified by nasal *** must be followed up until OME has disappeared completely,so that any complications are not missed.

关键词： Otitis media with effusion Tympanostomy tube Ventilation tube Grommet Child

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Electrolyte Solvation Structure Design for High Voltage Zinc-Based Hybrid Batteries

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Energy & Environmental Materials 2023年第4期6卷 239-247页

作者： pauline Jaumaux Shijian wang Shuoqing Zhao Bing Sun Guoxiu wang Centre for Clean Energy Technology School of Mathematical and Physical SciencesFaculty of ScienceUniversity of Technology SydneyUltimo NSW 2007Australia

Zinc(Zn)metal anodes have enticed substantial curiosity for large-scale energy storage owing to inherent safety,high specific and volumetric energy capacities of Zn metal ***,the aqueous electrolyte traditionally employed in Zn batteries suffers severe decomposition due to the narrow voltage stability ***,we introduce N-methylformamide(NMF)as an organic solvent and modulate the solvation structure to obtain a stable organic/aqueous hybrid electrolyte for high-voltage Zn *** is not only extremely stable against Zn metal anodes but also reduces the free water molecule availability by creating numerous hydrogen bonds,thereby accommodating high-voltage Zn‖LiMn_(2)O_(4)*** introduction of NMF prevented hydrogen evolution reaction and promoted the creation of an Frich solid electrolyte interphase,which in turn hampered dendrite growth on Zn *** Zn‖LiMn_(2)O_(4)full cells delivered a high average Coulombic efficiency of 99.7%over 400 cycles.

关键词： aqueous electrolytes electrolyte solvation structures high-voltage zinc batteries hybrid batteries

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Comment on:local control and survival after induction chemotherapy and ablative radiation versus resection for pancreatic ductal adenocarcinoma with vascular involvement

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Hepatobiliary Surgery and Nutrition 2021年第5期10卷 672-674页

作者： pauline Georges Alexandre Doussot Department of Digestive Surgical Oncology-Liver Transplantation Unit CHU BesanconBesanconFrance

we read with interest the study from Jolissaint et *** issued in the Annals of Surgery(1).In this single center retrospective study,the authors compared oncological outcomes in patients with pancreatic ductal adenocarcinoma(PDAC)and vascular involvement who underwent pancreatectomy(n=105)*** dose ablative radiation(A-RT,n=104).All patients received induction chemotherapy first,over a recent study period[2014-2018].while the rationale for submitting patients to pancreatectomy or A-RT was not clearly stated in the Methods section,comparison between the two groups showed that patients allocated to A-RT were frailer with higher Charlson Comorbidity indexes and Eastern Cooperative Oncology Group(ECOG)scores and harbored significantly larger tumors,more often left-sided,with more arterial involvement as compared to patients in the pancreatectomy group.

关键词： involvement adenocarcinoma Surgery

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Gold Mineralisation in the Intiédougou Prospect (Diébougou District) in Southwest Burkina Faso, west African Craton

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Journal of Minerals and Materials Characterization and Engineering（矿物质和材料特性和工程） 2024年第1期

作者： Yao Honoré Koffi wendkouni Passecdé pauline Zongo Nanema Mathieu Urbain wenmenga

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Elbow Dislocation in Children: About Two Cases and Review of the Literature

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Open Journal of Pediatrics 2024年第2期14卷 218-226页

作者： Nyanit Bob Dorcas Atangana Cédric Paterson Mantho Fopa pauline Kouna TsalaIrène Nadine Mvouni Bob Thérèse Raissa Bekima King Francis Ateaze Chrisantus Dikongue Diwondi Audrey Ndongo Réné Akoa Manga Ismael Evoni Molo Tatiana Choupo Guetchuin Stéphane Handy Eone Daniel Department of Surgery and Specialties Faculty of Medecine and Biomedical Sciences University of Yaoundé I Yaoundé Cameroon Infant Surgery Department of Yaounde Central Hospital Yaoundé Cameroon Faculty of Medecine and Pharmaceutical Sciences of Douala Douala Cameroon Troyes Hospital Center Troyes France Vire Normandie Hospital Center Normandie France Traumatology Department of Yaounde Central Hospital Yaoundé Cameroon

Background: Elbow dislocations in pediatric patients are rare injuries. This is a therapeutic emergency because a delay in treatment can have disastrous consequences on the functional level of the upper limb. Objective: To present the management of elbow dislocation in children in cases of limited resources. Presentation of the Cases: These were 2 older male children aged 7 and 9 years old, admitted to the emergency room for painful functional impotence of the right elbow after a fall and landing on the right hand. Clinical and radiological examinations were in favor of posterior elbow dislocations. The reductions were carried out under sedation and immobilization in Jersey. According to Robert’s criteria, the functional result was excellent in both patients. Conclusion: Emergency reduction and immobilization whatever the means ensure an excellent functional prognosis even in cases of limited resources.

关键词： Elbow Dislocation Child Diagnosis Treatment Limited Resources

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Effects of C2 hemisection on respiratory and cardiovascular functions in rats

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Neural Regeneration Research 2023年第2期18卷 428-433页

作者： pauline Michel-Flutot Arnaud Mansart Abdallah Fayssoil Stéphane Vinit UniversitéParis-Saclay UVSQInsermEND-ICAPVersaillesFrance UniversitéParis-Saclay UVSQInsermInfection et Inflammation(2I)VersaillesFrance Raymond PoincaréHospital AP-HPGarchesFrance

High ce rvical spinal co rd injuries induce permanent neuromotor and autonomic *** injuries impact both central respiratory and cardiovascular functions through modulation of the sympathetic nervous *** far,cardiovascular studies have focused on models of complete contusion or transection at the lower cervical and thoracic levels and diaphragm activity evaluations using invasive *** present study aimed to evaluate the impact of C2 hemisection on different parameters representing vital functions(i.e.,respiratory function,cardiovascular,and renal filtration parameters)at the moment of injury and 7 days post-injury in *** ventilatory parameters evaluated by plethys mography were impacted during quiet breathing after 7 days post-injury,whereas permanent diaphragm hemiplegia was observed by ultrasound and confirmed by diaphragmatic electromyography in anesthetized ***,the mean arterial pressure was reduced immediately after C2 hemisection,with complete compensation at 7 days *** filtration was unaffected at 7 days post-injury;however,remnant systolic dysfunction chara cterized by a reduced left ventricular ejection fraction persisted at 7 days *** together,these results demonstrated that following C2 hemisection,diaphragm activity and systolic function are impa cted up to 7 days post-injury,whereas the respiratory and cardiovascular systems display vast ada ptation to maintain ventilatory parameters and blood pressure homeostasis,with the latter likely sustained by the remaining descending sympathetic inputs spared by the initial injury.A better broad characterization of the physiopathology of high cervical spinal cord injuries covering a longer time period post-injury could be beneficial for understanding evaluations of putative therapeutics to further increase cardiorespiratory recovery.

关键词： C2 spinal cord injury cardiovascular diaphragm activity heart function hemiplegia rat model respiratory ultrasound

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Cognitive changes associated with ADT： a review of the literature

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Asian Journal of Andrology 2012年第2期14卷 232-238页

作者： Rhoda J Jamadar Mary J winters pauline M Maki Center for Cognitive Medicine Department of Psychiatry university of Illinois at Chicago Chicago IL 60612 USA Department of Psychology University of Illinois at Chicago Chicago IL 60612 USA

The use of androgen deprivation therapy （ADT） has increased since the early 1990s after early detection efforts and greater use of the prostate-specific antigen （PSA） test. Although ADT is associated with favorable clinical outcomes, ADT has been associated with an increased risk for cardiovascular disease, increased serum cholesterol, triglycerides, insulin resistance, body mass index and fat body mass. Here we review findings from 11 clinical studies examining the effects of ADT on cognition as measured by standardized tests in cognitive domains such as verbal and spatial memory. Most of these studies have important limitations, including small sample sizes, suboptimal control groups and baseline group differences in confounding factors. Despite these limitations, the best designed studies, those comparing patients on ADT to healthy controls, generally suggest that spatial memory might be especially sensitive to the effects of ADT. Critically, to date there is only one study involving random assignment of ADT versus close clinical observation. That study revealed a decrease in verbal memory with ADT, but was limited in sample size and did not include a measure of spatial memory. A recent observational study revealed no substantial evidence of cognitive impairment with ADT, even in the domain of verbal memory. Like the randomizedstudy, however, this large observational study lacked a measure of spatial memory. Overall, the studies with the best controls suggest a potential negative impact of ADT on spatial memory, and perhaps verbal memory, and a need for continued investigation of the impact of ADT on cognition, particularly in these two cognitive domains.

关键词： androgen deprivation therapy cognition prostate cancer

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