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Protection and Control of Modern Power Systems 2023年第2期8卷 260-277页

作者： Neevatika Verma narendra kumar Rajeev kumar Department of Electrical Engineering Delhi Technological UniversityNew DelhiIndia Electrical Engineering Department Jamia Millia IslamiaNew DelhiIndia Electrical and Electronics Engineering Department KIET Group of InstitutionsGhaziabadIndia

This paper presents the issue of the Sub-synchronous resonance(SSR)phenomenon in a series compensated DFIG-based wind power plant and its alleviation using a Battery Energy Storage-based Damping Controller(BESSDCL).A supplementary damping signal is developed considering the angular speed deviation and is incorporated into the BESS control system.Wide-area Measurement System data is used to determine the angular speed deviation.A lin-earized system model is developed to perform eigenvalue analysis,and to detect and examine unstable SSR modes.The variation of wind speed and three-phase fault are also taken into consideration to validate the robustness of the controller.To further verify the efficacy of the proposed damping controller,time-domain simulations are performed using MATLAB/Simulink.The application of the proposed BESSDCL stabilizes all the unstable system modes effectively at wind speeds of 7 m/s,9 m/s,and 11 m/s,and at 40%,50%,and 60%series compensation levels,as well three-phase fault conditions.

关键词： Battery energy storage system Damping controller Doubly-fed induction generator(DFIG) Series

Efficacy of Bluetooth-Based Data Collection for Road Traffic Analysis and Visualization Using Big Data Analytics

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Big Data Mining and Analytics 2023年第2期6卷 139-153页

作者： Ashish Rajeshwar Kulkarni narendra kumar K.Ramachandra Rao Department of Electrical Engineering Delhi Technological UniversityDelhi 110042India Department of Civil Engineering Indian Institute of Technology DelhiDelhi 110016India

Effective management of daily road traffic is a huge challenge for traffic personnel.Urban traffic management has come a long way from manual control to artificial intelligence techniques.Still real-time adaptive traffic control is an unfulfilled dream due to lack of low cost and easy to install traffic sensor with real-time communication capability.With increasing number of on-board Bluetooth devices in new generation automobiles,these devices can act as sensors to convey the traffic information indirectly.This paper presents the efficacy of road-side Bluetooth scanners for traffic data collection and big-data analytics to process the collected data to extract traffic parameters.Extracted information and analysis are presented through visualizations and tables.All data analytics and visualizations are carried out off-line in R Studio environment.Reliability aspects of the collected and processed data are also investigated.Higher speed of traffic in one direction owing to the geometry of the road is also established through data analysis.Increased penetration of smart phones and fitness bands in day to day use is also established through the device type of the data collected.The results of this work can be used for regular data collection compared to the traditional road surveys carried out annually or bi-annually.It is also found that compared to previous studies published in the literature,the device penetration rate and sample size found in this study are quite high and very encouraging.This is a novel work in literature,which would be quite useful for effective road traffic management in future.

关键词： Bluetooth scanners big data visualization speed sensors

Real Time Automation and Ratio Control Using PLC&SCADA in Industry 4.0

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Computer Systems Science & Engineering 2023年第5期45卷 1495-1516页

作者： Basant Tomar narendra kumar Mini Sreejeth Dept of Electrical Engineering Delhi Technological UniversityDelhi 110042India

Industrial Control Systems(ICS)and SCADA(Supervisory Control and Data Acquisition)systems play a critical role in the management and regulation of critical infrastructure.SCADA systems brings us closer to the real-time application world.All process and equipment control capability is typically provided by a Distributed Control System(DCS)in industries such as power stations,agricultural systems,chemical and water treatment plants.Instead of control through DCS,this paper proposes a SCADA and PLC(Programmable Logic Controller)system to control the ratio control division and the assembly line division inside the chemical plant.A specific design and implementation method for development of SCADA/PLC based real time ratio control and automated assembly line system in a chemical plant is introduced.The assembly line division is further divided into sorting stage,filling stage and the auxiliary stage,which includes the capping unit,labelling unit and then the storage.In the ratio control division,we have defined the levels inside the mixer and ratio of the raw materials through human machine interface(HMI)panel.The ratio of raw materials is kept constant on the basis of flow rates of wild stream and manipulated stream.There is a flexibility in defining new levels and the ratios of the raw materials inside the mixer.But here we taken the predefined levels(low,medium,high)and ratios(3:4,2:1,2:5).Control valves are used for regulating the flow of the compositions.In the assembly line division,the containers are sorted on the basis of size and type of material used i.e.,big sized metallic containers and small sized non-metallic containers by inductive and capacitive proximity sensors.All the processes are facilitated with laser beam type or reflective type sensors on the conveyor system.Building a highly stable and dependable PLC/SCADA system instead of Distributed Control System is required to achieve automatic management and control of chemical industry processes to reduce waste manpower and physical resources,as well as

关键词： Industry 4.0 ratio control automation PLC SCADA control valves proximity sensors conveyor system solenoid valves

Small bowel adenocarcinoma:An overview

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World Journal of Gastrointestinal Oncology 2022年第2期14卷 413-422页

作者： Divya Khosla Treshita Dey Renu Madan Rahul Gupta Shikha Goyal narendra kumar Rakesh Kapoor Department of Radiotherapy and Oncology Postgraduate Institute of Medical Education and ResearchChandigarh 160012India Department of Gastroenterology Shalby Multispeciality HospitalMohali 160062PunjabIndia

Small bowel adenocarcinoma(SBA)is a rare malignancy of the gastrointestinal tract.However,these tumors are among those with worst prognosis.Vague clinical signs and symptoms and radiological diagnostic challenges often delay treatment,which negatively impacts the prognosis of the patients.However,recent advances in imaging technology,like multidetector computed tomography,magnetic resonance imaging,and capsule endoscopy,have made earlier and accurate diagnosis possible.Surgery is the treatment of choice followed by adjuvant therapy.However,there are no strict treatment guidelines available for the management of SBA.Most of the available evidence from colorectal and gastric carcinoma has been extrapolated to adequately manage SBA.Prognosis for SBA is better than gastric carcinoma but worse than colorectal carcinoma.Currently,there is not enough information on the molecular characteristics and tumor pathogenesis.Because the incidence of SBA is very low,there is a need for further studies to evaluate the possible application of newer investigative agents and strategies to obtain a better outcome within the framework of international collaborations.

关键词： Adenocarcinoma Chemotherapy Prognostic factors Small bowel Surgery

Review of sub-synchronous interaction in wind integrated power systems: classification, challenges, and mitigation techniques

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Protection and Control of Modern Power Systems 2023年第2期8卷 13-38页

作者： Neevatika Verma narendra kumar Saket Gupta Hasmat Malik Fausto Pedro García Márquez Department of Electrical Engineering Delhi Technological UniversityDelhi 110042India Department of Electrical Power Engineering Faculty of Electrical EngineeringUniversiti Teknologi Malaysia(UTM)81310 JohorMalaysia Ingenium Research Group DepartmentUniversidad Castilla-La Mancha13071 Ciudad RealSpain Department of Electrical Engineering Graphic Era Deemed to be UniversityDehradun 248002India Instrumentation and Control Engineering Department Bharati Vidyapeeth’s College of EngineeringNew Delhi 110056India

Emerging sub-synchronous interactions(SSI)in wind-integrated power systems have added intense attention after numerous incidents in the US and China due to the involvement of series compensated transmission lines and power electronics devices.SSI phenomenon occurs when two power system elements exchange energy below the synchro-nous frequency.SSI phenomenon related to wind power plants is one of the most significant challenges to main-taining stability,while SSI phenomenon in practical wind farms,which has been observed recently,has not yet been described on the source of conventional SSI literature.This paper first explains the traditional development of SSI and its classification as given by the IEEE,and then it proposes a classification of SSI according to the current research status,reviews several mitigation techniques and challenges,and discusses analysis techniques for SSI.The paper also describes the effect of the active damping controllers,control scheme parameters,degree of series compensation,and various techniques used in wind power plants(WPPs).In particular,a supplementary damping controller with converter controllers in Doubly Fed Induction Generator based WPPs is briefly pronounced.This paper provides a real-istic viewpoint and a potential outlook for the readers to properly deal with SSI and its mitigation techniques,which can help power engineers for the planning,economical operation,and future expansion of sustainable development.

关键词： Damping controller Doubly fed induction generator(DFIG) Series compensations Sub-synchronous interactions(SSI) Sub-synchronous resonance(SSR)

Study of Structural, Optical, Electrical and Dielectric Properties of Gd-Doped ZnO Composites Synthesized by Solid State Reaction Method

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Open Journal of Composite Materials 2024年第2期14卷 91-108页

作者： Santosh kumar Kundara Kanhaiya Chawla Dinesh kumar Yadav Chhagan Lal Balram Tripathi narendra Jakhar Department of Physics University of Rajasthan Jaipur India Sw. P.N.K.S. Government PG College Dausa India Government PG College Pratapgarh India S.S. Jain Subodh PG (Autonomous) College Jaipur India

In this manuscript, we are reporting structural, bonding, optical, dielectric, and electrical properties of Gd-doped ZnO composite samples (Zn1−xGdxO, x = 0, 0.05, 0.10) prepared by solid-state reaction method. XRD spectra confirm the wurtzite hexagonal phase with a grain size distribution of 42 - 47 nm. The FT-IR spectra confirm bonding behavior like Zn-O, O=C=O, and O-H stretching modes. FESEM micrographs show that the grains of crystallites possess nearly spherical morphology. Optical absorption spectra confirm that the optical band gap decreases systematically from 3.19 eV to 3.15 eV for x = 0.0 to x = 0.10 samples. For all samples, PL spectra exhibited near-band emission, blue emission, and green emission peaks. The dielectric constant decreases as the applied frequency increases. Hall effect results show that with increasing doping concentration of Gd, mobility and resistivity increase while bulk concentration decreases. Current-Voltage study shows that current increases when temperature is increased. Rare earth-doped ZnO is potential material used for optoelectronics and spintronics device applications. Properties of Gd-doped ZnO are studied by various research groups, but dielectric studies are limitedly reported. Therefore, the present research work aims to study the change of electrical, optical, and dielectric properties of Gd-doped ZnO for device applications.

关键词： ZnO:Gd Composites Optical Band Gap Green Emission Dielectric Constant

A phase II study of neoadjuvant chemotherapy followed by organ preservation in patients with muscle-invasive bladder cancer

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Asian Journal of Urology 2022年第3期9卷 318-328页

作者： Chinna Babu Dracham narendra kumar Santosh kumar Arun Elangovan Budhi Singh Yadav Ravimohan S.Mavuduru Anupam Lal Pramod K.Gupta Rakesh Kapoor Department of Radiotherapy&Oncology PGIMERChandigarhIndia Department of Urology PGIMERChandigarhIndia Department of Radiodiagnosis PGIMERChandigarhIndia Department of Biostatistics PGIMERChandigarhIndia

Objective:Conservative approaches in muscle-invasive bladder cancer(MIBC)have been evolved to avoid aggressive surgery,but are limited to elderly,frail,and patients medically unfit for surgery.Our study aimed to assess the response rate of neoadjuvant chemotherapy(NACT)before radiotherapy(RT)in MIBC patients.Methods:Forty patients with urothelial carcinoma of stage T2-T4a,N0,M0 were enrolled between November 2013 and November 2015,and treated with three cycles of NACT with gemcitabine-cisplatin.Post-NACT response was assessed using Response Evaluation Criteria in Solid Tumors(RECIST)criteria.Patients who achieved complete response(CR)and partial response(PR)>50%were treated with radical RT,and those who had PR50%or CR,and were treated with RT.Five(12.5%)patients who had PR<50%,SD,or PD underwent RC.All patients who received radiation showed CR after 6 weeks.Median follow-up was 43 months(range:10-66 months)and median overall survival(OS)was not reached.Three-year OS,local control,and disease-free survival were 70.1%,60.9%,50.6%,respectively,and 50%of patients preserved their functioning bladder.Three-year OS rate was 88.9%in patients who achieved CR to NACT,73.1%in patients with PR≥50%and 40%in patients with PR<50%.Conclusion:NACT followed by RT provides a high probability of local response with bladder preservation in CR patients.Appropriate use of this treatment regimen in carefully selected patients may omit the need for morbid surgery.

关键词： Bladder preservation Neoadjuvant chemotherapy Radiotherapy Muscle-invasive bladder cancer

DNA computing over the ring Z4[v]/(v^2-v)

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International Journal of Biomathematics 2018年第7期11卷 149-166页

作者： narendra kumar Abhay kumar Singh Department of Applied Mathematics Indian Institute of Technology (ISM) Dhanbad Jharkhand 826004India

In this paper,we discuss the DNA construction of general length over the finite ring =Z4+vZ4,with v2=v,which plays a very significant role in DNA computing.We discuss the GC weight of DNA codes over R.Several examples... 详细信息

关键词： Cyclic codes DNA codes GC weight

Role of intraluminal brachytherapy in palliation of biliary obstruction in cholangiocarcinoma:A brief review

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World Journal of Gastrointestinal Endoscopy 2022年第3期14卷 106-112页

作者： Divya Khosla Samreen Zaheer Rahul Gupta Renu Madan Shikha Goyal narendra kumar Rakesh Kapoor Department of Radiotherapy and Oncology Postgraduate Institute of Medical Educa Department of Gastroenterology and Hepatology Shalby Multispeciality HospitalMohali 160062PunjabIndiation and ResearchChandigarh 160012U.T.India

Surgery is the only curative treatment for cholangiocarcinoma. However, mostpatients present with advanced disease, and hence are unresectable. Thus, theintent of treatment shifts from curative to palliative in the majority of cases.Biliary drainage with intraluminal brachytherapy is an effective means ofrelieving the malignant biliary obstruction. In this review, we discuss the role ofbrachytherapy in the palliation of obstructive symptoms in extrahepatic cholangiocarcinoma.

关键词： Biliary tract Cholangiocarcinoma Extrahepatic Intraluminal brachytherapy

Impact of obesity and diabetes on arthritis: An update

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Health 2013年第1期5卷 143-156页

作者： Rajesh Pandey narendra kumar Seema Paroha Ram Prasad Mukesh Yadav Shalini Jain Hariom Yadav Amity Institute of Microbial Technology Amity University Noida India College of Advance Studies Datia India Department of Biochemistry Awadhesh Pratap Singh University Rewa India Department of Biochemistry Jawaharlal Nehru Agriculture University Jabalpur India Department of Biotechnology IMS Engineering College Ghaziabad India NIDDK National Institutes of Health Bethesda USA

The incidence of obesity and diabetes has been increased with alarming rate in recent years and became a common problem around the globe including developing as well as in developed countries with incalculable social costs. Obesity and type 2 diabetes are two common co-morbidities occur together. Obesity and diabetes is closely associated with many diseases, osteoarthritis, hypertension, certain form of cancer, sleep-breathing disorders and coronary heart disease. Impacts of obesity and diabetes (insulin resistance) on arthritis have been seen in patients that we associated with combination of various factors like increased availability of high-energy foods, genetic susceptibility and decreased physical activity in modern society. Arthritis is becoming pandemic around the globe and its occurrence with obesity and diabetes has been observed more common than ever. Combination of these two chronic conditions makes these diseases more vulnerable for human health. Till now very limited information is established about the pathological and mechanistic correlation among these health ailments. In this review article we aimed to survey the literature covering the influence of obesity and diabetes on arthritis pathology and tried to establish correlation with these diseases.

关键词： Obesity Diabetes Arthritis Complications