检索结果-南通市图书馆

Extension of Distribution Transformer Life in the Presence of Smart Inverter-based Distributed Solar Photovoltaic Systems

引用

CSEE Journal of Power and Energy Systems 2024年第1期10卷 88-95页

作者： Kanhaiya kumar Saran Satsangi Ganesh Balu Kumbhar Department of Electrical and Electronics Engineering Motihari College of EngineeringMotihariBiharIndia Department of Electrical Engineering National Institute of Technology(NIT)PatnaPatnaBiharIndia Department of Electrical Engineering Indian Institute of Technology(IIT)RoorkeeRoorkeeUttarakhandIndia

A transformer is an essential but expensive power delivery equipment for a distribution *** many distribution utilities worldwide,a sizable percentage of transformers are near the end of their designed *** the same time,distribution utilities are adopting smart inverter-based distributed solar photovoltaic(SPV)systems to maximize renewable *** central objective of this paper is to propose a methodology to quantify the effect of smart inverter-based distributed SPV systems on the aging of distribution *** proposed method is first tested on a modified IEEE-123 node distribution *** that,the procedure is applied to a practical distribution system,i.e.,the Indian Institute of Technology(IIT)Roorkee campus,*** transformer aging models,alongside advanced control functionalities of grid-tied smart inverter-based SPV systems,are implemented in *** open-source simulation tool(OpenDSS)is used to model distribution *** analyze effectiveness of various inverter functionalities,time-series simulations are performed using exponential load models,considering daily load curves from multiple seasons,load types,current harmonics,*** show replacing a traditional inverter with a smart inverter-based SPV system can enable local reactive power generation and may extend the life of a distribution *** results demonstrate,simply by incorporating smart inverter-based SPV systems,transformer aging is reduced by 15%to 22%in comparison to SPV systems operating with traditional inverters.

关键词： Distribution transformer loss of life smart inverter functions solar photovoltaic systems thermal models Volt-VAr control

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Assessing foundation behaviour under complex loading near tunnels

引用

Journal of Mountain Science 2024年第10期21卷 3503-3520页

作者： Piyush kumar Vinay Bhushan CHAUHAN Aayush kumar Civil Engineering Department Madan Mohan Malaviya University of TechnologyGorakhpur 273010India

The stability of strip footings subjected to eccentrically inclined loads is critical for reliable foundation *** study investigates the effect of a circular unlined tunnel in a rock mass on the ultimate bearing capacity(UBC)of a foundation with width B under inclined and eccentric *** finite element limit analysis was employed to evaluate the reduction in UBC of the footing resting above a *** examined critical parameters include normalized load eccentricity(e/B),load inclination(β),and horizontal and vertical distances of the tunnel from the foundation(P/B and Q/B,respectively),along with rock mass *** results reveal that for e/B≥0.25 and≤60°,the reduction coefficient,Rc≥0.90,suggesting that the presence of a tunnel has a minimal impact on the load-bearing capacity of the footing,with failure primarily governed by load eccentricity and ***,potential failure mechanisms are explored,showing that at lower e/B,higherβ,and lower Q/B,the tunnel significantly affects footing's failure ***,at higher e/B and lowerβ,failure is due to rotational effects of footing,regardless of the tunnel's *** predict the Rc more accurately,due to the time-consuming nature of direct calculations,both MLR and ANN models were *** MLR model provided a baseline for comparison,while the ANN model,with a coefficient of determination(R2)of 0.98,demonstrated superior accuracy compared to the R2=0.96 of *** both approaches ensured robust and efficient predictions of *** Rc does not directly provide the reduced UBC of footing due to presence of tunnel,the study introduced bearing capacity factor(Nc)to enable direct calculation of the reduced UBC of *** findings offer theoretical guidelines for preliminary design and provide practitioners with an effective tool for evaluating UBC reduction in complex loading scenarios involving tunnels.

关键词： Unlined tunnel Shallow foundation FELA Rock Mass ANN MLR

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A review on potential heterocycles for the treatment of glioblastoma targeting receptor tyrosine kinases

引用

Oncology Research 2024年第5期32卷 849-875页

作者： NILAM BHUSARE MAUSHMI kumar Somaiya Institute for Research&Consultancy Somaiya Vidyavihar UniversityVidyavihar(East)Mumbai400077India

Glioblastoma,the most aggressive form of brain tumor,poses significant challenges in terms of treatment success and patient *** treatment modalities for glioblastoma include radiation therapy,surgical intervention,and ***,the median survival rate remains dishearteningly low at 12–15 *** of the major obstacles in treating glioblastoma is the recurrence of tumors,making chemotherapy the primary approach for secondary glioma ***,the efficacy of drugs is hampered by the presence of the blood-brain barrier and multidrug resistance ***,considerable research efforts have been directed toward understanding the underlying signaling pathways involved in glioma and developing targeted *** tackle glioma,numerous studies have examined kinase-downstream signaling pathways such as *** targeting specific signaling pathways,heterocyclic compounds have demonstrated efficacy in glioma ***,key kinases including phosphatidylinositol 3-kinase(PI3K),serine/threonine kinase,cytoplasmic tyrosine kinase(CTK),receptor tyrosine kinase(RTK)and lipid kinase(LK)have been considered for *** pathways play crucial roles in drug effectiveness in glioma *** compounds,encompassing pyrimidine,thiazole,quinazoline,imidazole,indole,acridone,triazine,and other derivatives,have shown promising results in targeting these *** part of this review,we propose exploring novel structures with low toxicity and high potency for glioma *** development of these compounds should strive to overcome multidrug resistance mechanisms and efficiently penetrate the blood-brain *** optimizing the chemical properties and designing compounds with enhanced drug-like characteristics,we can maximize their therapeutic value and minimize adverse *** the complex nature of glioblastoma,these novel structures should be rigorously tested and e

关键词： Glioblastoma Kinase pathway Pyrimidine Quinazoline Heterocycles

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Critical Review on Balanites aegyptiaca Delile:Phytoconstituents,Pharmacological Properties and Nanointerventions

引用

Chinese Journal of Integrative Medicine 2024年第7期30卷 653-663页

作者： Surendra kumar Gautam Rakesh kumar Paul Devesh M.Sawant Amita Sarwal Kaisar Raza Department of Pharmacy School of Chemical Sciences and PharmacyCentral University of RajasthanBandarsindriAjmerRajasthan305817India University Institute of Pharmaceutical Sciences Panjab UniversityChandigarh160014India

Balanites aegyptiaca Delile(BA)is an enduring xerophytic woody and spinous flowering tree and is commonly known as desert date or Ingudi(Hingot).It belongs to the family Zygophyllaceae,which is specific to be drought areas of Nigeria,Africa,South Asia and India(Rajasthan).In Ayurveda,this traditional medicinal plant is reported for the management of jaundice,syphilis,yellow fever,metabolic disorders,liver,and spleen *** main aim of the review is to compile its medicinal uses and further advancements to showcase the promises inherited in various parts of the plant for the benefit of *** per the literature survey,various researchers have focused on the detailed investigation of BA including the phytopharmacological evidence,chemical constituents,nano-formulations,commercialized products,and clinical *** remarkable scaffolds and isolated compounds like diosgenin,yamogenin,balanitin1/2,balanitin 3,bal4/5,bal6/7,rutin-3-glycosides,3,7-diglycosides,(3,12,14,16)–(12-hydroxycholest-5-ene-3,16-diyl-bis)-D-glucopyranoside and balanitoside have been ***,this traditional plant has been scientifically proven by in vitro and in *** on the complete review of this plant,most of the compounds have been isolated from the fruit and kernel ***,based on the literature,a histogram was developed for pharmacological activity in which antidiabetic study was found to be more compared to other pharmacological *** a spinous desert dates,this plant needs to be explored more to bring out newer phytochemicals in the management of various diseases.

关键词： Delile desert date phytochemicals nano-phytopharmaceutical pharmacological activities traditional medicine

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Fuzzy Reliability and Availability of System under a Calendar-based Inspection Involving Multiple Failures and Its Application to Wind Turbine System

引用

Journal of Systems Science and Systems Engineering 2024年第2期33卷 187-206页

作者： Mintu kumar Himani Pant S.B.Singh Department of Mathematics Statistics and Computer Science G.B.Pant University of AgricultureTechnologyPantnagarUttarakhandIndia

Uncertainty is an important factor that needs to be considered while analyzing the performance of any engineering *** order to quantify uncertainty,fuzzy set theory is frequently used by most of researchers,including energy system *** to the classical reliability theory,component lifetimes have crisp parameters,but due to uncertainty and inaccuracy in data,it is sometimes very difficult to determine the exact values of these parameters in real-world *** overcome this difficulty in the current research,failure and repair rates were taken as triangular fuzzy numbers to determine the fuzzy availability of a system undergoing calendar-based periodic inspection subject to multiple failure modes(FMs).It was assumed that each component in the system had an exponential failure rate and repair rate with fuzzy *** FMs were explicitly taken into account when a functional state of the system was *** FM had a random failure *** the occurrence of any failure,a random time was selected for the relevant corrective repair *** proposed research was studied for one of the major sources of green energy,namely a wind turbine system wherein all the derived propositions have been implemented on it.

关键词： Fuzzy reliability fuzzy availability wind turbine system multiple failure modes triangular fuzzy number

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Negative Stiffness Mechanism on An Asymmetric Wave Energy Converter by Using A Weakly Nonlinear Potential Model

引用

China Ocean Engineering 2024年第4期38卷 689-700页

作者： Sunny kumar POGULURI Dongeun KIM Yoon Hyeok BAE Department of Ocean Engineering IIT MadrasChennaiIndia Multidisciplinary Graduate School Program for Wind Energy Jeju National UniversityJejuRepublic of Korea Mechanical and System Design Engineering Hongik UniversitySeoulRepublic of Korea

Salter's duck,an asymmetrical wave energy converter(WEC)device,showed high efficiency in extracting energy from 2D regular waves in the past;yet,challenges remain for fluctuating wave *** can potentially be addressed by adopting a negative stiffness mechanism(NSM)in WEC devices to enhance system efficiency,even in highly nonlinear and steep 3D waves.A weakly nonlinear model was developed which incorporated a nonlinear restoring moment and NSM into the linear formulations and was applied to an asymmetric WEC using a time domain potential flow *** model was initially validated by comparing it with published experimental and numerical computational fluid dynamics *** current results were in good agreement with the published *** was found that the energy extraction increased in the range of 6%to 17%during the evaluation of the effectiveness of the NSM in regular *** irregular wave conditions,specifically at the design wave conditions for the selected test site,the energy extraction increased by 2.4%,with annual energy production increments of approximately *** findings highlight the potential of NSM in enhancing the performance of asymmetric WEC devices,indicating more efficient energy extraction under various wave conditions.

关键词： asymmetric wave energy converter negative stiffness mechanism weakly nonlinear potential flow power

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Detection of internal crack growth in polyethylene pipe using guided wave ultrasonic testing

引用

Earthquake Engineering and Engineering Vibration 2024年第2期23卷 319-329页

作者： Jay kumar Shah Hao Wang Said El-Hawwat Centre of Advanced Infrastructure and Transportation RutgersThe State University of New JerseyNJ 08854USA Department of Civil and Environmental Engineering RutgersThe State University of New JerseyNJ 08854USA

Despite the success of guided wave ultrasonic inspection for internal defect detection in steel pipes,its application on polyethylene(PE)pipe remains relatively *** growth of internal cracks in PE pipe severely affects its pressure-holding capacity,hence the early detection of internal cracks is crucial for effective pipeline maintenance *** study extends the scope of guided wave-based ultrasonic testing to detect the growth of internal cracks in a natural gas distribution PE *** experiments and a finite element model were planned to study the wave-crack interaction at different stages of axially oriented internal crack growth with a piezoceramic transducer-based setup arranged in a pitch-catch *** dispersion analysis supplemented with preliminary experiments was performed to isolate the optimal inspection frequency,leading to the selection of the T(0,1)mode at 50-kHz for the investigation.A transmission index based on the energy of the T(0,1)mode was developed to trace the extent of simulated crack *** findings revealed an inverse linear correlation between the transmission index and the crack depth for crack growth beyond 20%crack depth.

关键词： polyethylene pipes internal cracks guided wave ultrasonic testing torsional modes finite element modeling

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Genetic variability and trait association analysis in linseed(Linum usitatissimum L.)for yield and related traits

引用

Oil Crop Science 2024年第3期9卷 151-159页

作者： Sandeep kumar Yadav Neha Singh Hemant kumar Yadav CSIR-National Botanical Research Institute Rana Pratap MargLucknow226001UPIndia Academy of Scientific and Innovative Research(AcSIR) Ghaziabad201002India State Planning Commission LucknowUPIndia

Diversity information mining about a crop for different attributes is an essential step for effective breeding *** present investigation evaluates the quantum of genetic variability and determines the relationship among the important agro-economic traits based on two years of phenotypic data of 210 accessions of *** traits,capsule weight per plant,capsule per plant,husk weight per plant,and seed weight per plant exhibited comparatively higher genetic coefficient of variation(GCV)and phenotypic coefficient of variation(PCV).In contrast,oil content and seed per capsule exhibited a lower *** high magnitude of broad sense heritability was observed for all traits except seeds per capsule and husk weight per *** trait,capsules per plant,plant height,and days to 50%flowering showed high genetic advance coupled with high *** cluster analysis grouped 210 accessions into six distinct *** of 210,144(68.57%)accessions were grouped into three clusters(I,II,and III),in which cluster-III was the largest,containing 64 accessions followed by cluster II and *** highest inter-cluster distance was observed between clusters-I and V(127.85),while the lowest was between clusters-II and IV(27.09).The positive correlation of capsule weight per plant with the seed weight per plant and a negative correlation with the days to 50%flowering indicates that high yielding linseed varieties with early flowering/maturity could be developed through direct and indirect ***,seed yield and oil content could be enhanced together as indicated by ghe positive association among these two important *** this study,high yielding accessions with moderate to high oil content such as GP36,GP31,GP14,GP54,GP26,GP24,GP34,GP21,GP37 and GP27 and early flowering(less than 70 days)accessions such as GP2,GP26,GP27,CG33,CG44,CG42,CG132,and CG31 identified as potential genetic materials that could be exploited for developing early matu

关键词： Linseed Genetic variability Heritability Genetic advance PCA Dendrogram

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Gravity-driven powder flow and the influence of external vibration on flow characteristics

引用

Particuology 2024年第5期88卷 201-209页

作者： Muhammad Shahid Ansari Ratna kumar Annabattula Sathyan Subbiah Department of Mechanical Engineering Indian Institute of Technology MadrasChennai 600036India

The controlled and homogeneous flow of dry granular powders through hoppers is essential for applications,namely,packaging of food grains,fertilizers and additive manufacturing processes such as directed energy deposition for better product *** of the major issues encountered in the granular flows through hoppers is flow stagnation due to the well-known arching ***-assisted granular flow through hoppers is one of the mechanisms used for better mass flow *** this work,the influence of external mechanical vibration on the powder flow is investigated experimentally and using discrete element ***,the mass flow rate through the hopper increases with an increase in vibration amplitude and then decreases,signifying the existence of an optimal amplitude of *** DEM simulations explained the underlying mechanisms for the existence of an optimal amplitude of vibration corresponding to the maximum mass flow rate.A range of vibration amplitudes from 0 mm to 3.5 mm is used to study the flow behaviour;the maximum flow of around 33 g/s to 35 g/s is observed for 0.75 mm to 1.25 mm vibration amplitude for the hopper-particle combination studied in this *** work also reports the influence of vibration frequency,hopper,and particle dimension on the flow *** research facilitates the effective use of mechanical vibration to enhance powder flow that can further be extended to non-spherical and multi-material particles.

关键词： Discrete element method Flow rate Granular flow Path tracking Vibration intensity

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Colorectal cancer cell dormancy:An insight into pathways

引用

World Journal of Gastroenterology 2024年第33期30卷 3810-3817页

作者： Anil kumar Lekha Saha Department of Pharmacology Post Graduate Institute of Medical Education and ResearchChandigarh 160012India

Cancer cell dormancy(CCD)in colorectal cancer(CRC)poses a significant challenge to effective *** CRC,CCD contributes to tumour recurrence,drug resistance,and amplifying the disease's *** molecular mechanisms governing CCD and strategies for eliminating dormant cancer cells remain largely ***,understanding the molecular mechanisms governing dormancy is crucial for improving patient outcomes and developing targeted *** editorial highlights the complex interplay of signalling pathways and factors involved in colorectal CCD,emphasizing the roles of Hippo/YAP,pluripotent transcription factors such as NANOG,HIF-1αsignalling,and Notch signalling ***,ERK/p38α/β/MAPK pathways,AKT signalling pathway,and Extracellular Matrix Metalloproteinase Inducer,along with some potential less explored pathways such as STAT/p53 switch and canonical and non-canonical Wnt and SMAD signalling,are also involved in promoting colorectal *** their clinical significance,these findings may offer the potential for identifying key dormancy regulator pathways,improving treatment strategies,surmounting drug resistance,and advancing personalized medicine ***,insights into dormancy mechanisms could lead to the development of predictive biomarkers for identifying patients at risk of recurrence and the tailoring of targeted therapies based on individual dormancy *** is essential to conduct further research into these pathways and their modulation to fully comprehend CRC dormancy mechanisms and enhance patient outcomes.

关键词： Colorectal cancer Colorectal cancer cell dormancy Cancer cell dormancy Pathways in colorectal cancer dormancy

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：