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Characterisation of the granular dynamics at the interface between a pipe and a granular flow in a rotating drum

Particuology 2024年第3期86卷 117-125页

作者： Francois Rioual Paule Emmanuelle Eva Gbehe Research unit FRISE National Research Institute for Agriculture Food and the Environment1 Rue Pierre Gilles De Gennes92160AntonyFrance

A new mobile bed heat exchanger is presented in this work which is composed of a flowing granular material in a rotating drum and a cylindrical pipe with potential interest in different energy applications as cooling,heating or heat recovery *** optimal design of the device requires a characterisation of the phenomena involved at the interface between the granular flow and the *** process is modelled by the discrete element method and a global classification of the flow patterns around the pipe is presented with respect to the three main control parameters of the problem:the Froude number,the diameter ratio and the relative filling height of the *** second part is devoted to the characterisation of the structure of the flow at the interface(velocity field,density field)in particular in a so-called Biflow regime where granular motion occurs above as well as below the pipe which is favourable to transfer by convection.A typical behavior at the interface with the pipe consists of a zone I with high velocities of particles at the top of the pipe,a second zone with quasistatic particles or low velocity particles at the front and at the bottom of the pipe and a last zone ll of depletion of particles at the back of the *** Froude number has a limited effect on the features of this structure on the first layer in the range of Froude numbers considered whereas the relative height is a more determinant parameter to control the relative magnitude of velocities in zone I and zone Il as well as the extent of the depletion *** first hydrodynamical characterisation can shed light on the dynamical regimes with improved transfer between the particles and the pipe boundary.

关键词： Granular flow Transfer Heat exchange Mobile bed Boundary condition

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A GMDA clustering algorithm based on evidential reasoning architecture

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Chinese Journal of Aeronautics 2024年第1期37卷 300-311页

作者： Haibin WANG Xin GUAN Xiao YI Shuangming LI Guidong SUN Naval Aviation University Yantai 264001China unit 92941 of PLA Huludao 125001China Institute of Systems Engineering Beijing 100082China

The traditional clustering algorithm is difficult to deal with the identification and division of uncertain objects distributed in the overlapping region,and aimed at solving this problem,the Evidential Clustering based on General Mixture Decomposition Algorithm(GMDA-EC)is ***,the belief classification of target cluster is carried out,and the sample category of target distribution overlapping region is ***,on the basis of General Mixture Decomposition Algorithm(GMDA)clustering,the fusion model of evidence credibility and evidence relative entropy is constructed to generate the basic probability assignment of the target and achieve the belief division of the ***,the performance of the algorithm is verified by the synthetic dataset and the measured *** experimental results show that the algorithm can reflect the uncertainty of target clustering results more comprehensively than the traditional probabilistic partition clustering algorithm.

关键词： Evidential clustering Credal partition Evidential reasoning Mixed decomposition Gaussian mixture model

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A Practical Approach for Missing Wireless Sensor Networks Data Recovery

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China Communications 2024年第5期21卷 202-217页

作者： Song Xiaoxiang Guo Yan Li Ning Ren Bing The College of Communications Engineering Army Engineering University of PLANanjing 210007China The 63891 unit of PLA Luoyang 471000China

In wireless sensor networks(WSNs),the performance of related applications is highly dependent on the quality of data ***,missing data is almost inevitable in the process of data acquisition and *** methods often rely on prior information such as low-rank characteristics or spatiotemporal correlation when recovering missing WSNs ***,in realistic application scenarios,it is very difficult to obtain these prior information from incomplete data ***,we aim to recover the missing WSNs data effectively while getting rid of the perplexity of prior *** designing the corresponding measurement matrix that can capture the position of missing data and sparse representation matrix,a compressive sensing(CS)based missing data recovery model is ***,we design a comparison standard to select the best sparse representation basis and introduce average cross-correlation to examine the rationality of the established ***,an improved fast matching pursuit algorithm is proposed to solve the *** results show that the proposed method can effectively recover the missing WSNs data.

关键词： average cross correlation matching pursuit missing data wireless sensor networks

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What is the effect of Tribulus terrestris on testicular morphology and sperm production?An experimental study in the rat model

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Asian Journal of Andrology 2024年第1期26卷 67-70页

作者： Marcello Henrique Araujo Da Silva Gabriela Faria Buys-Goncalves Joao Henrique Duque Reis Estrada Francisco Jose Barcellos Sampaio Diogo Benchimol de Souza Urogenital Research unit Rio de Janeiro State UniversityRio de Janeiro 20551-030RJBrazil

The objective of this study was to investigate whether treatment with Tribulus terrestris(Tt)has any impact on the testicular morphology and function in a rodent *** male rats were divided into a control group and a group receiving 100 mg kg^(-1) body weight of Tt *** 4o days of experiment,the animals were submitted to euthanasia;epididymal tail spermatozoa were collected;and spermatozoa concentration,motility,and viability were *** addition,testicles were collected and processed for histomorphometrical *** were compared using the Student's t-test and considered significant when P<*** concentration,motility,and viability showed no difference between the ***,testicular weight and volume,seminiferous tubule diameter,tunica propria surface density,seminiferous epithelium surface density,and intertubular compartment surface density were statistically similar between the ***,seminiferous epithelium height and tubular lumen surface density were augmented in animals treated with *** with Tt does not cause a major impact on testicular morphology,promoting only subtle *** difference on spermatozoa parameters was observed.

关键词： morphometry testicle Tribulus terrestris

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Device-assisted enteroscopy: Are we ready to dismiss the spiral?

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World Journal of Gastroenterology 2024年第26期30卷 3185-3192页

作者： Alessandro Mussetto Elettra Merola Cesare Casadei Daniele Salvi Fabiola Fornaroli Silvia Cocca Margherita Trebbi Armando Gabbrielli Cristiano Spada Andrea Michielan Department of Gastroenterology S Maria della Croci HospRavenna 48121Italy Department of Gastroenterology unit G.B.Grassi Hospital(ASL Roma 3)Roma 00122Italy Section of Digestive Endoscopy and Gastroenterology Fondazione PoliambulanzaBrescia 25124Italy Gastroenterology and Endoscopy unit Department of Medicine and SurgeryUniversity of ParmaParma 43125Italy Gastroenterology and Endoscopy unit Azienda Ospedaliero Universitaria Policlinico di ModenaModena 41121Italy Center for Medical Sciences(CISMed) University of TrentoTrento 38122Italy Gastroenterology and Digestive Endoscopy unit Santa Chiara HospitalAzienda Provinciale per i Servizi SanitariTrento 38122Italy Digestive Endoscopy unit Fondazione Policlinico Universitario A.Gemelli IRCSSRoma 00168Italy

Motorized spiral enteroscopy(MSE)is the latest advance in device-assisted *** events related to MSE were discussed in a recent large systematic review and meta-analysis and were directly compared with those of balloon enteroscopy in a case-matched study and a randomized controlled *** the real-life application of MSE,an unexpected safety issue emerged regarding esophageal injury and the technique has been withdrawn from the global market,despite encouraging results in terms of diagnostic and therapeutic *** conducted an Italian multicenter real-life prospective study,which was prematurely terminated after the withdrawal of MSE from the *** primary goals were the evaluation of MSE performance(both diagnostic and therapeutic)and its safety in routine endoscopic practice,particularly in the early phase of introduction in the endoscopic unit.A subanalysis,which involved patients who underwent MSE after unsuccessful balloon enteroscopy,demonstrated,for the first time,the promising performance of MSE as a rescue *** its remarkable performance in clinical practice and its potential role as a backup technique following a previously failed enteroscopy,it may be more appropriate to refine and enhance MSE in the future rather than completely abandoning it.

关键词： Motorized spiral enteroscopy Rescue enteroscopy Diagnostic yield Adverse events AGREE classification

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Palliative long-term abdominal drains vs large volume paracenteses for the management of refractory ascites in end-stage liver disease

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World Journal of Hepatology 2024年第3期16卷 428-438页

作者： Senamjit Kaur Rodrigo V Motta Bryony Chapman Victoria Wharton Jane D Collier Francesca Saffioti Oxford Liver unit Department of Gastroenterology and HepatologyOxford University Hospitals NHS Foundation TrustOxford OX39DUUnited Kingdom Oxford Liver unit and Translational Gastroenterology unit Nuffield Department of MedicineUniversity of OxfordOxford OX39DUUnited Kingdom

BACKGROUND Long-term abdominal drains(LTAD)are a cost-effective palliative measure to manage malignant ascites in the community,but their use in patients with end-stage chronic liver disease and refractory ascites is not routine *** safety and cost-effectiveness of LTAD are currently being studied in this setting,with preliminary positive *** hypothesised that palliative LTAD are as effective and safe as repeat palliative large volume paracentesis(LVP)in patients with cirrhosis and refractory ascites and may offer advantages in patients’quality of *** To compare the effectiveness and safety of palliative LTAD and LVP in refractory ascites secondary to end-stage chronic liver *** A retrospective,observational cohort study comparing the effectiveness and safety outcomes of palliative LTAD and regular palliative LVP as a treatment for refractory ascites in consecutive patients with end-stage chronic liver disease followed-up at our united Kingdom tertiary centre between 2018 and 2022 was ***’s exact tests and the Mann-Whitney U test were used to compare qualitative and quantitative variables,***-Meier survival estimates were generated to stratify time-related outcomes according to the type of *** Thirty patients had a total of 35 indwelling abdominal drains and nineteen patients underwent regular *** baseline characteristics were similar between the *** antibiotics were more frequently prescribed in patients with LTAD(P=0.012),while the incidence of peritonitis did not differ between the two groups(P=0.46).The incidence of acute kidney injury(P=0.014)and ascites/drain-related hospital admissions(P=0.004)were significantly higher in the LVP *** overall survival was similar in the two groups(log-rank P=0.26),but the endpoint-free survival was significantly shorter in the LVP group(P=0.003,P<0.001,P=0.018 for first ascites/drain-related admission,acute kidney injury and drain

关键词： Decompensated liver cirrhosis Indwelling abdominal catheter Rocket drain Palliative care Safety Quality of life

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Quantitative method for calculating spatial release region for laser-guided bomb

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Journal of Systems Engineering and Electronics 2024年第4期35卷 1053-1062页

作者： YANG Ping XIAO Bing CHEN Xin HAO Yuntao Air Force Early Warning Academy Wuhan 430019China unit 93175 of the PLA Changchun 136000China

The laser-guided bomb(LGB)is an air-to-ground pre-cision-guided weapon that offers high hit rates,great power,and ease of *** are guided by semi-active laser ground-seek-ing technology,which means that atmospheric conditions can affect their *** spatial release region(SRR)of LGBs is difficult to calculate precisely,especially when there is a poor field of *** can result in a lower real hit *** increase the hit probability of LGBs in tough atmospheric situa-tions,a novel method for calculating the SRR has been *** method is based on the transmittance model of the 1.06μm laser in atmospheric species and the laser diffuse reflection model of the target surface to determine the capture target time of the laser ***,it calculates the boundary ballistic space starting position by ballistic model and gets the spatial scope of the spatial release *** method can determine the release region of LGBs based on flight test data such as instantaneous velocity,altitude,off-axis angle,and atmospheric *** more effectively employing aircraft release conditions,atmospheric visibility and other factors,the SRR calculation method can improve LGB hit probabi-lity by 9.2%.

关键词： laser-guided bombs(LGBs) hit probability atmo-spheric transmittance spatial release region(SRR)boundary ballistic

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Should we perform decompressive laparotomy during severe acute pancreatitis with intra-abdominal hypertension below 25 mmHg:Only the gut knows

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World Journal of Gastrointestinal Surgery 2024年第5期16卷 1470-1473页

作者： Thibault Vieille Melissa Crotet Celia Turco Paul Monasterolo Hadrien Winiszewski Gael Piton Medical Intensive Care unit Besancon University HospitalBesancon 25000France Intensive Care unit Vesoul HospitalVesoul 70000France Department of Digestive Surgical Oncology-Liver Transplantation unit Besancon University HospitalBesancon 25000France Inserm UMRS-938 Centre de Recherche Saint-Antoine(CRSA)Sorbonne UniversitéParis 10041NY212France Intensive Care unit Nord Franche Comte HospitalTrevenans 90400France

We suggest that during severe acute pancreatitis(SAP)with intra-abdominal hypertension,practitioners should consider decompressive laparotomy,even with intra-abdominal pressure(IAP)below 25 ***,in this setting,non-occlusive mesenteric ischemia(NOMI)may occur even with IAP below this cutoff and lead to transmural necrosis if abdominal perfusion pressure is not promptly *** report our experience of 18 critically ill patients with SAP having undergone decompressive laparotomy of which one third had NOMI while IAP was mostly below 25 mmHg.

关键词： Acute pancreatitis Abdominal compartment syndrome Decompressive laparotomy Mesenteric ischemia Intra-abdominal pressure Abdominal perfusion pressure

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Implementation of gastrointestinal function protection in severe acute pancreatitis

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Hepatobiliary & Pancreatic Diseases International 2024年第5期23卷 521-522页

作者： Fu-Zheng Tao Rong-Lin Jiang Shui-Fang Jin Intensive Care unit Taizhou Integrated Traditional Chinese and Western Medicine HospitalTaizhou 310075China Intensive Care unit the First Affiliated Hospital of Zhejiang Chinese Medical University(Zhejiang Provincial Hospital of Chinese Medicine)Hangzhou 310006China

Severe acute pancreatitis(SAP)is a serious systemic disease associated with strong local inflammatory reactions and serious systemic pathophysiological disorders caused by trypsin *** with SAP are prone to exhibit gastrointestinal ***,gastrointestinal dysfunction further aggravates the systemic inflammatory response and metabolic abnormalities,resulting in a more critical condition of *** dysfunction is considered to be the“trigger”of multiple organ dysfunction syndrome[1].Thus,it is important to maintain gastrointestinal homeostasis in the treatment of SAP.

关键词： gastrointestinal pancreatitis acute

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NLRP3 inflammasome plays a vital role in the pathogenesis of age-related diseases in the eye and brain

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Neural Regeneration Research 2024年第7期19卷 1425-1426页

作者： Jack Jonathan Maran Odunayo Omolola Mugisho Buchanan Ocular Therapeutics unit Department of OphthalmologyNew Zealand National Eye CentreUniversity of AucklandAucklandNew Zealand

Key points:With aging,there is increased nucleotide-binding oligomerization domain-(NOD-)like receptor(NLR) protein-3(NLRP3) activation in neural and ocular *** of the NLRP3 inflammasome appears to be a common denominator in the pathogenesis of age-related diseases of the eye and *** inhibition of the NLRP3 inflammasome may be a potent therapy for preventing the development and progression of age-related eye and brain diseases.

关键词： NLRP3 pathogenesis inflam

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