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Classification of Soil Types Using Geographic Object-Based Image Analysis and Random Forests

Pedosphere 2018年第6期28卷 913-925页

作者： Andrei DORNIK Lucian DRAGUT petru URDEA Department of Geography West University of Timioara

There is increasing interest in developing automatic procedures to segment landscapes into soil spatial entities that replace conventional, expensive manual procedures for delineating and classifying soils. Geographic object-based image analysis(GEOBIA)partitions remote sensing imagery or digital elevation models into homogeneous image objects based on image segmentation. We used an object-based methodology for the detailed delineation and classification of soil types using digital maps of topography and vegetation as soil covariates, based on the Random Forests(RF) classifier. We compared the object-based method's results with those of a pixel-based classification using the same classifier. We used 18 digital elevation model derivatives and 5 remote sensing indices that were related to vegetation cover and soil. Using 171 soil profiles with their associated environmental variable values,the RF method was used to identify the most important soil type predictors for use in the segmentation process. A stack of rastergeodatasets corresponding to the selected predictors was segmented using a multi-resolution segmentation algorithm, which resulted in homogeneous objects related to soil types. These objects were further classified as soil types using the same method, RF. We also conducted a pixel-based classification using the same classifier and soil profiles, and the resulting maps were assessed in terms of their accuracy using 30% of the soil profiles for validation. We found that GEOBIA was an effective method for soil type mapping, and was superior to the pixel-based approach. The optimized object-based soil map had an overall accuracy of 58%, which was 10% higher than that of the optimized pixel-based map.

关键词： GEOBIA landscape segmentation soil classification soil covariates soil mapping

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Test Time Minimization for Hybrid BIST of Core-Based Systems

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Journal of Computer Science & Technology 2006年第6期21卷 907-912页

作者： Gert Jervan petru Eles Zebo Peng Raimund Ubar Maksim Jenihhin Embedded Systems Laboratory (ESLAB) Linkoeing University Sweden Department of Computer Engineering Tallinn University of Technology Estonia

This paper presents a solution to the test time minimization problem for core-based systems. We assume a hybrid BIST approach, where a test set is assembled, for each core, from pseudorandom test patterns that are generated online, and deterministic test patterns that are generated off-line and stored in the system. In this paper we propose an iterative algorithm to find the optimal combination of pseudorandom and deterministic test sets of the whole system, consisting of multiple cores, under given memory constraints, so that the total test time is minimized. Our approach cmploys a fast estimation methodology in order to avoid exhaustive search and to speed-up the calculation process. Experimental results have shown the efficiency of the algorithm to find near optimal solutions.

关键词： SoC self-test hybrid BIST

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Access control and surveillance in a smart home

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High-Confidence Computing 2022年第1期2卷 38-46页

作者： Cristina Stolojescu-Crisan Calin Crisan Bogdan-petru Butunoi Department of Communications Politehnica University of TimisoaraTimisoaraRomania SafeFleet Telematics TimisoaraRomania Department of Computer Science West University of TimisoaraTimișoaraRomania

In the past years smart homes solutions have become more and more popular with the introduction of a high number of both Internet of Things(IoT)applications and smart *** automation and security systems market is in a continuous growth,traditional security systems are evolving fast,and more and more people choose Smart home *** this paper,we propose two IoT based systems in the context of Smart homes:qToggle for multiple home automation,and MotionEyeOS,a video surveillance OS for single-board *** qToggle devices are based on ESP8266/ESP8285 chips or on Raspberry Pi boards and smart sensors,while MotionEye uses Raspberry Pi boards.

关键词： Access control Internet of things Security Smart homes Video surveillance

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“I Dread the Heart Surgery but it Keeps My Child Alive”—Experiences of Parents of Children with Right Ventricular Outflow Tract Anomalies during the Assessment for Cardiac Reoperation

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Congenital Heart Disease 2023年第3期18卷 349-359页

作者： Birgitta Svensson petru Liuba Anne Wennick Malin Berghammer Department of Cardiology Pediatric Heart CenterSkåne University HospitalLundSweden Department of Clinical Sciences Lund PediatricsLund UniversityLundSweden Department of Care Science Faculty of Health and SocietyMalmöUniversityMalmöSweden Department of Paediatrics The Queen Silvia Children’s HospitalGothenburgSweden The Department of Health Sciences University WestTrollhättanSweden

Background:Parents of children with complex right ventricular outflow tract(RVOT)anomalies are confronted with their child’s need for heart surgery early in life and repeated reoperations later *** assessment needs to be performed whenever an indication for reoperation is *** aim was to illuminate the experiences of parents of children diagnosed with RVOT anomalies,in particular,how they experience their child’s heart disease and everyday life during the assessment and after the decision on whether to perform a ***:Individual interviews(n=27)were conducted with nine parents on three occasions between 2014 and 2016 and analyzed using reflexive thematic ***:The analysis resulted in the following five main coexisting themes:The heart surgery keeps my child alive illuminates parents’experiences during and after the assessment and emphasizes that heart surgery,although dreaded,is central for their child’s survival;Everyday struggles illuminates the different struggles parents had to face to ensure that their child would be in the best possible condition;the remaining three themes,Unconditional love,Trust in life,and Togetherness,illuminate the ways in which the parents gained inner strength and confidence in their everyday ***:Although the parents were grateful for the assessment and had learned to navigate among the fears it aroused,they experienced several distressing situations during the assessment process that should be *** inviting both the parents and their child to participate in the child’s care,individualized support can take into account the needs of both parents and child.

关键词： Parents children right ventricular outflow tract anomalies everyday life heart surgery reflexive thematic analysis

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Kinetics and thermodynamics modeling of Nd(Ⅲ) removal from aqueous solution using modified Amberlite XAD7

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Journal of Rare Earths 2020年第3期38卷 306-314页

作者： petru Negrea Andreea Gabor Corneliu Mircea Davidescu Mihaela Ciopec Adina Negrea Narcis Duteanu Politehnica University of Timisoara Faculty of Industrial Chemistry and Environmental Engineering 2 Piata Victoriei RO 300006 Timisoara Romania

New adso rbent material was obtained by modification of commercial Amberlite XAD7 with thiourea that represents a non-toxic,cheap and environmentally friendly *** adsorbent was used for removal of neodymium ions from aqueous *** modified Amberlite involved in this study shows good adsorption capacities(74.3 mg/g) and excellent efficiency during Nd removal *** order to elucidate the mechanism of the Nd adsorption process kinetic,thermodynamic and equilibrium studies were performed,establishing this way which kinetic model better describes the Nd adsorption *** the thermodynamic studies prove that the Nd adsorption on thiourea modified Amberlite XAD7 is an endothermic and spontaneous process.

关键词： Neodymium Amberlite XAD7 Adsorption mechanism Adsorption isotherm Thiourea Rare earths

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Comment on: prospective study of stereotactic body radiation therapy for hepatocellular carcinoma on waitlist for liver transplant

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Hepatobiliary Surgery and Nutrition 2021年第4期10卷 510-511页

作者： Nicolas Tabchouri petru Bucur Ephrem Salamé Department of Digestive Surgery Hepatobiliary Surgery and Liver TransplantationUniversity Hospital of ToursCHU ToursToursFrance INSERM U1082 PoitiersFrance FHU SUPORT ToursFrance

We read with great interest the recently published article of Wong et al.(1).Through their study,the authors sought to evaluate the efficacy and safety of stereotactic body radiation therapy(SBRT)in patients presenting with hepatocellular carcinoma(HCC),awaiting liver transplantation(LT).This is the first prospective study to analyze SBRT as a bridging treatment before LT and compare it to other bridging therapies such as transarterial chemoembolization(TACE)and high intensity focused ultrasound(HIFU).

关键词： hepatocellular prospective

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A New Fuzzy Adaptive Algorithm to Classify Imbalanced Data

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Computers, Materials & Continua 2022年第1期70卷 73-89页

作者： Harshita Patel Dharmendra Singh Rajput Ovidiu petru Stan Liviu Cristian Miclea School of Information Technology&Engineering Vellore Institute of TechnologyVellore632014India Technical University of Cluj Napoca Faculty of Automation and Computer ScienceCluj Napoca400114Romania

Classification of imbalanced data is a well explored issue in the data mining and machine learning community where one class representation is overwhelmed by other *** Imbalanced distribution of data is a natural occurrence in real world datasets,so needed to be dealt with carefully to get important *** case of imbalance in data sets,traditional classifiers have to sacrifice their performances,therefore lead to *** paper suggests a weighted nearest neighbor approach in a fuzzy manner to deal with this *** have adapted the‘existing algorithm modification solution’to learn from imbalanced datasets that classify data without manipulating the natural distribution of data unlike the other popular data balancing *** K nearest neighbor is a non-parametric classification method that is mostly used in machine learning *** classification with the nearest neighbor clears the belonging of an instance to classes and optimal weights with improved nearest neighbor concept helping to correctly classify imbalanced *** proposed hybrid approach takes care of imbalance nature of data and reduces the inaccuracies appear in applications of original and traditional *** show that it performs well over the existing fuzzy nearest neighbor and weighted neighbor strategies for imbalanced learning.

关键词： Machine learning fuzzy classification nearest neighbor adaptive approach optimal weights

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Post-hepatectomy liver failure:A timeline centered review

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Hepatobiliary & Pancreatic Diseases International 2023年第6期22卷 554-569页

作者： Mohamed Bekheit Lisa Grundy Ahmed KA Salih petru Bucur Eric Vibert Mudassar Ghazanfar Department of Surgery NHS GrampianForesterhill Health CampusAshgrove RoadAB252ZN AberdeenUK Institute of Medical Sciences Medical SchoolForesterhill Health CampusAshgrove RoadAB252ZN AberdeenUK Hépatica Integrated Center of HPB CareElite HospitalAgriculture RoadAlexandriaEgypt Department of Surgery University Hospital ToursVal de la Loire 37000France Centre Hépatobiliaire Paul Brousse Hospital12 Paul Valliant Couturier94804 VillejuifFrance

Background: Post-hepatectomy liver failure(PHLF) is a leading cause of postoperative mortality after liver surgery. Due to its significant impact, it is imperative to understand the risk stratification and preventative strategies for PHLF. The main objective of this review is to highlight the role of these strategies in a timeline centered way around curative resection. Data sources: This review includes studies on both humans and animals, where they addressed PHLF. A literature search was conducted across the Cochrane Library, Embase, MEDLINE/Pub Med, and Web of Knowledge electronic databases for English language studies published between July 1997 and June 2020. Studies presented in other languages were equally considered. The quality of included publications was assessed using Downs and Black’s checklist. The results were presented in qualitative summaries owing to the lack of studies qualifying for quantitative analysis. Results: This systematic review with 245 studies, provides insight into the current prediction, prevention, diagnosis, and management options for PHLF. This review highlighted that liver volume manipulation is the most frequently studied preventive measure against PHLF in clinical practice, with modest improvement in the treatment strategies over the past decade. Conclusions: Remnant liver volume manipulation is the most consistent preventive measure against PHLF.

关键词： Post-hepatectomy liver failure Liver neoplasms Prediction Prevention Management

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Developing a TRL-oriented roadmap for the adoption of biocomposite materials in the construction industry

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Frontiers of Engineering Management 2023年第2期10卷 223-236页

作者： Tudor-Cristian PETRESCU Johannes T.VOORDIJK petru MIHAI Department of Structural Mechanics Faculty of Civil Engineering and Building ServicesGheorghe Asachi Technical University of Iasi700050 IasiRomania Department of Civil Engineering Faculty of Engineering TechnologyUniversity of Twente7552 LW Enschedethe Netherlands Department of Concrete MaterialsTechnology and ManagementFaculty of Civil Engineering and Building ServicesGheorghe Asachi Technical University of Iasi700050 IasiRomania

The construction industry is a major contributor to environmental *** effect of the construction industry on the environment may be mitigated using eco-friendly construction materials,such as *** developed,biocomposites may offer a viable alternative to the current materials in ***,biocomposites are lagging in terms of adoption and eventual use in the construction *** article provides insights into the steps for biocomposites to become a product that is ready to use by the construction industry in a structural *** development and the adoption of such a material is tackled with the use of two concepts,i.e.,technology readiness level and roadmapping,and explored in a case study on the“liquid wood”.Furthermore,interviews in the construction industry are carried out to identify the industry’s take on biocomposites.A customized roadmap,which underlines a mostly nontechnical perspective concerning this material,has ***,the adoption and diffusion issues that the“liquid wood”may encounter are outlined and complemented with further recommendations.

关键词： biocomposite technology readiness level roadmap interview “liquid wood”

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Inside the Light Boojums: a Journey to the Land of Boundary Defects

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Analysis in Theory and Applications 2020年第2期36卷 128-160页

作者： Stan Alama Lia Bronsard petru Mironescu Department of Mathematics&Statistics McMaster UniversityHamiltonOntarioL8S 4K1 Canada Universit'e de Lyon CNRS UMR 5208Universit´e Lyon 1Institut Camille Jordan43 blvd.du 11 Novembre 1918F-69622 Villeurbanne CedexFrance

We consider minimizers of the energy Eε(u)=:∫Ω[1/2|■u|^2+1/4ε2(|u|^2-1)^2]dx+1/2ε^s∫■ΩW(u,g)ds,u:Ω→■,0-cosα)^2,0 详细信息

We consider minimizers of the energy Eε(u)=:∫Ω[1/2|■u|^2+1/4ε2(|u|^2-1)^2]dx+1/2ε^s∫■ΩW(u,g)ds,u:Ω→■,0-cosα)^2,0

关键词： Nematics thin-film limit Ginzburg-Landau type energy weak anchoring boundary vortices asymptotic profile

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