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Contingency Reserve Evaluation for Fast Frequency Response of Multiple Battery Energy Storage Systems in a Large-scale Power Grid

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CSEE Journal of Power and Energy Systems 2023年第3期9卷 873-883页

作者： indira Alcaide-Godinez Feifei Bai Tapan Kumar Saha Rizah Memisevic School of Information Technology and Electrical Engineering the University of QueenslandBrisbaneQLD 4072Australia School of Information Technology and Electrical Engineering the University of Queensland(UQ)BrisbaneQLD 4072 School of Engineering and Built Environment Griffith UniversityGold CoastQLD 4222Australia EPEC Group BrisbaneQLD 4014Australia

Recently,the fast frequency response(FFR)service by large-scale battery energy storage systems(BESSs)has been successfully proved to arrest the frequency excursion during an unexpected power ***,adequate frequency response relies on proper evaluation of the contingency reserve of *** BESS FFR reserve is commonly managed under fixed contracts,ignoring various response characteristics of different BESSs and their coexisting *** paper proposes a new methodology based on dynamic grid response and various BESS response characteristics to optimise the FFR reserves and prevent the frequency from breaching the under-frequency load shedding(UFLS)*** superiority of the proposed method is demonstrated to manage three large-scale BESSs operating simultaneously in an Australian power grid under high renewable penetration ***,the proposed method can identify remaining battery power and energy reserve to be safely utilised for other grid services(e.g.,energy arbitrage).The results can provide valuable insights for integrating FFR into conventional ancillary services and techno-effective management of multiple BESSs.

关键词： Fast frequency response(FFR) fast frequency contingency reserve multiple large-scale battery energy storage system(BESS) synthetic inertia requirement under-frequency load shedding(UFLS)

Enhancement of Essential Oil Yield from Melaleuca Leucadendra *** by Lignocellulose Degradation Pre-Treatment Using Filamentous Fungi

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Journal of Bioresources and Bioproducts 2021年第4期6卷 379-386页

作者： Tjokorda I.indira Khairul Hadi Burhan Robert Manurung Ana Widiana Department of Bioengineering School of Life Science and TechnologyInstitute of Technology BandungIndonesia Agriculture and Bioproduct Technology Research Group Institute of Technology BandungJl.Raya Jatinangor Km 20.75Sumedang 45363Indonesia Department of Biology Faculty of Sciences and Technology Sunan Gunung Djati UniversityJl.A.H.Nasution No.105Bandung 40614Indonesia

The essential oil from Melaleuca leucadendra *** has been widely used as a perfume and traditional remedy,cosmetics and pharmaceutical products ingredient since many years *** common technology to recover the oil is hydro-distillation and ***,all oil can not be fully extracted from the leaves by this method due to the recalcitrant structure of leaves that hindrance the access of the *** a submerged fermentation as a pretreatment step prior to the extraction process helped to loosen the lignocellulose structure and enhance oil release in the extraction *** this study,the raw materials were collected from the natural forest in Buru Island,Maluku,*** biological agents applied in these processes were Phanerochaete chrysosporium ITBCC136 and Trichoderma viride *** oil extraction process was conducted by method of steam-distillation,the oil was analysed using gas chromatography-mass spectroscopy(GC-MS),and the lignocellulose content in the biomass was measured by the fractionation *** treatment using *** provided the highest increase in yield percentage up to 3.47%as compared with control of 1.45%,with the lowest percentages of the remained cellulose,while the fermentation with the presence of *** did not affect the oil yield even the lignin content was decrease as much as 21%.The percentages of 1,8-cineole in the oil were almost unchanged,which was about 20%of the oil.

关键词： Cajuput oil Cineole Filamentous fungi Lignocellulose biodegradation Phanerochaete chrysosporium Trichoderma viride

How can probiotic improve irritable bowel syndrome symptoms?

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World Journal of Gastrointestinal Surgery 2021年第9期13卷 923-940页

作者： indira Benjak Horvat Ivana Gobin Andrea Kresović Goran Hauser Department of Gastroenterology Varaždin General HospitalVaražin 42000Croatia Department of Microbiology and Parasitology Faculty of MedicineUniversity of RijekaRijeka 51000Croatia Department of Gastroenterology Clinical Hospital Center RijekaRijeka 51000Croatia Department of Gastroenterology Faculty of MedicineClinical Hospital Center RijekaUniversity of RijekaRijeka 51000Croatia

The onset and manifestations of irritable bowel syndrome(IBS)is associated with several factors,and the pathophysiology involves various central and peripheral *** studies indicate that the management of gut microbiota could significantly affect the improvement of subjective disorders in patients with *** clinical trials have assessed the efficacy of probiotics for IBS with controversial *** clinical trials have suggested that probiotics can improve global IBS symptoms,while others only improve individual IBS symptoms,such as bloating scores and abdominal pain *** a few clinical trials have found no apparent effect of probiotics on IBS ***,probiotics appear to be safe for patients with ***,the question of which probiotics should be used for certain IBS subtypes remains *** everyday practice,the dose of the recommended probiotic remains questionable,as well as how long the probiotic should be used in *** use of probiotics in the M subtype and non-classified IBS is particularly problematic,in which combination therapy should be recommended due to the change in ***,new approaches are needed in the design of clinical studies that should address certain subtypes of IBS.

关键词： Irritable bowel syndrome Obstipation Diarrhoea Abdominal pain Probiotic Prebiotic Symbiotic Microbiota

Deep Learning-Enabled Brain Stroke Classification on Computed Tomography Images

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Computers, Materials & Continua 2023年第4期75卷 1431-1446页

作者： Azhar Tursynova Batyrkhan Omarov Natalya Tukenova indira Salgozha Onergul Khaaval Rinat Ramazanov Bagdat Ospanov Al-Farabi Kazakh National University AlmatyKazakhstan International University of Tourism and Hospitality TurkistanKazakhstan Zhetisu University Named After I.Zhansugurov TaldykorganKazakhstan Abai Kazakh National Pedagogical University AlmatyKazakhstan Brunch Center of Excellence in Taldykorgan TaldykorganKazakhstan

In the field of stroke imaging, deep learning (DL) has enormousuntapped *** clinically significant symptoms of a cerebral strokeare detected, it is crucial to make an urgent diagnosis using available imagingtechniques such as computed tomography (CT) scans. The purpose of thiswork is to classify brain CT images as normal, surviving ischemia or cerebralhemorrhage based on the convolutional neural network (CNN) model. In thisstudy, we propose a computer-aided diagnostic system (CAD) for categorizingcerebral strokes using computed tomography images. Horizontal flip datamagnification techniques were used to obtain more accurate *** Data Generator to magnify the image in real time and apply anyrandom transformations to each training image. An early stopping method toavoid overtraining. As a result, the proposed methods improved several estimationparameters such as accuracy and recall, compared to other machinelearning methods. A python web application was created to demonstrate theresults of CNN model classification using cloud development techniques. Inour case, the model correctly identified the drawing class as normal with 79%accuracy. Based on the collected results, it was determined that the presentedautomated diagnostic system could be used to assist medical professionals indetecting and classifying brain strokes.

关键词： Ischemic stroke hemorrhage CNN deep learning classification

A Novel Single Switch High Gain DC-DC Converter Topology for Renewable Energy Systems

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Energy Engineering 2021年第2期118卷 199-209页

作者： G.indira Kishore M.Premkumar Ramesh Kumar Tripathi Chandra Sekhar Nalamati GMR Institute of Technology RajamSrikakulamAndhra Pradesh532127India Motilal Nehru National Institute of Technology AllahabadUttar Pradesh211004India

Renewable energy with sources such as photovoltaic(PV)or fuel cells can be utilized for the generation of elec-trical *** these sources generate fewer voltage values and therefore require high gain converters to match with DC bus voltage in *** high gain converters can be implemented with switched capacitors to meet the required DC bus *** capacitors operate in a series and parallel combination during switch-ing operation and produce high static gain,limits reverse voltage that appears across the components.A novel converter is proposed that satisfies all the features such as high voltage gain,only one switch,forces less potential stress cross the components,ripple current is *** features of the proposed converter are verified through MATLAB/SIMULINK.

关键词： DC-DC converter high gain renewable energy switched capacitors

Performance analysis of multiple gain boost converter with hybrid maximum power point tracker for solar PV connected to grid

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Clean Energy 2021年第4期5卷 655-672页

作者： B.M.Kiran Kumar M.S.indira S.Nagaraja Rao M S Ramaiah University of Applied Sciences Department of Electrical EngineeringBangaloreIndia-560058

This paper analyses the performance of a multiple gain boost converter(MGBC)connected to a solar photovoltaic(SPV)system with a grid-tied *** capacitor inductor capacitor(CLC)-based MGBC is integrated to lift the output voltage of the SPV to the required *** voltage lifts/levels in a boost converter(BC)are based on the number of CLC *** suggested MGBC is compared with various conventional BCs in terms of boost factor and component count.A hybrid fuzzy logic-perturb&observe maximum power point tracker(HFL-P&O MPPT)developed is used to monitor P_(max)(maximum power)generated by the ***,a comparative analysis of the suggested MPPT with a conventional P&O and fuzzy logic-based(FLB)MPPT for a CLC-based MGBC is *** comparison is made in terms of rise time,voltage ripples(%),steady-state time and boost *** output characteristics of the developed model for different irradiation conditions are analysed using the MATLAB/Simulink *** MPPT simulation result exhibits minimum oscillations at MPP and a significantly better rise time of 0.015 s when compared with a conventional MPPT and FLB *** proposed CLC-MGBC gives an appreciable boost factor of *** generated SPV power is supplied to the grid through a conventional inverter and synchronized using a phase-locked loop *** total harmonic distortion of 1.66%obtained in the output current of the inverter is within the permissible range of the IEEE standards.

关键词： CLC-MGBC FLB MPPT Grid-tie inverter SPV THD

Paederia foetida- a promising ethno-medicinal tribal plant of northeastern India

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Journal of Forestry Research 2013年第4期24卷 801-808页

作者： Silpi ChandaDept.of Pharmacy Jaypee University of Information Technology indira P Sarethy Biplab De Kuldeep Singh Dept.of Biotechnology Jaypee Institute of Information Technology Dept.of Pharmaceutical Science Assam University Dept.of Pharmacy Jaypee University of Information Technology

The northeastern region of India constitutes one of the biodi- versity hotspots of the world. The ethnic groups inhabiting this region practice their distinctive traditional knowledge systems using biodiver- sity for food, shelter and healthcare. Among the less-studied plants, Paederia foetida has been used by various ethnic tribes as food and medicine. Many of its therapeutic properties relate to the gastrointestinal system and suggest its potential utility for gastrointestinal ailments. This is a review of the ethnobotanical uses, phytochemistry and therapeutic properties of P. foetida compiled from various reports. P. foetida is promising as a remedy for life-style related conditions, especially treat- ment of ulcers. Its utility highlights the need for proper evaluation of tribal plants as medicines and the species could be considered for devel- opment of new drugs.

关键词： Paederia foetida Tribal medicine ethnobotany phyto-chemistry therapeutic ulcer

Major Soil Chemical Properties of the Major Tea-Growing Areas in India

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Pedosphere 2015年第2期25卷 316-328页

作者： Tanmoy KARAK Ranjit Kumar PAUL Romesh Kumar BORUAH indira SONAR Biswajyoti BORDOLOI Amrit Kumar DUTTA Borsha BORKOTOKY Upper Assam Advisory Centre Tea Research Association Division of Statistical Genetics Indian Agricultural Statistics Research Institute Arunachal Advisory Centre Tea Research AssociationDirectorate of Trade and CommerceGovernment of Arunachal Pradesh

Major chemical properties of tea-growing soils are of paramount importance for better management in a sustainable ***,this study was carried out to understand the major soil chemical properties of major tea(Camellia sinensis L.)-growing areas,Dibrugarh and Tinsukia districts,in the state of Assam,India.A total of 991 surface soil samples were collected from 15 large tea estates(TEs) for analysis of their major chemical *** pH ranged from 3.61 to *** organic carbon and total nitrogen ranged from 2.4 to 47.3 and 0.24 to 3.60 g kg^(-1),*** soils were sufficiently rich in plant-available potassium(as K_2O),which ranged from 127.71 to 252.33 mg kg^(-1),exceeding the amount prescribed for optimum tea yield of > 100 mg kg^(-1).Plant-available sulfur among soil samples widely varied from 4 to 129 mg kg^(-1).Results of hierarchical clustering analysis for homogenous grouping of the 15 TEs based on soil chemical properties showed that the 15 TEs could be classified into three distinct groups which consisted of6,8 and 1 TEs,*** on the Kolmogorov-Smirnov(K-S) test,the best fitted theoretical probability distributions were found out for different soil chemical *** could be concluded that a balanced fertilizer application would be needed as a part of tea improvement program using soil chemical test.

关键词： organic carbon plant-available potassium plant-available sulfur probability distribution soil pH tea estates total nitrogen

Resurgence of measles virus infection in an eliminated country, Sri Lanka

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Asian Pacific Journal of Tropical Medicine 2024年第5期17卷 208-213页

作者： Merennage Anusha Yasanthi Fernando Gankandage Prabhath Chathuranga Kaanthaka Gunaradha Abeygunasekara Dedunu Dias Weligamage Janaki indira Abeynayake Department of Medical Microbiology and Immunology Faculty of MedicineUniversity of ColomboSri Lanka Department of Virology Medical Research InstituteColombo 08Sri Lanka Department of Medical Administration Medical Research InstituteColombo 08Sri Lanka

Objective:To describe the situation of measles in Sri Lanka from May to November,2023 and to define the role of virology laboratory towards case confirmation and epidemiological and genetic characterization of the ***:This retrospective study analyzed all samples tested for measles from 1st of May to 30th of November,2023 at National Measles Rubella Laboratory,Sri *** to the World Health Organization(WHO)algorithm,serum and oropharyngeal/nasopharyngeal swabs were tested with WHO recommended kits for anti-measles IgM and measles virus specific RNA,*** RNA positive samples were sequenced at reference laboratory,*** of sequencing data and construction of phylogenetic tree were carried out at National Measles Rubella *** was analyzed using descriptive ***:Of the total 1132 serum samples and 497 oropharyngeal/nasopharyngeal swabs from 1326 patients,657(49.5%)patients were confirmed as measles by anti-measles IgM,measles virus specific RNA or ***(55.6%,n=365)and the age group from>20 to≤30 years(33.0%,n=217)predominated positive *** provinces reported measles positive *** samples sequenced(100%,n=42)were genotype D8 with 95.2%(n=40)bearing *** ***:We described resurgence of measles in an eliminated country,confirming the genotype to be D8,one of the two genotypes currently circulating ***,the study strongly convinced the importance of a strengthened virological surveillance system in an eliminated country,despite its eliminated status.

关键词： Measles elimination Resurgence of measles Sri Lanka Genotype D8 National Measles Rubella Laboratory