检索结果-南通市图书馆

Hybrid Energy Storage to Control and Optimize Electric Propulsion Systems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2022年第6期71卷 6183-6200页

作者： Sikander Hans Smarajit Ghosh Suman Bhullar aman Kataria Vinod Karar Divya Agrawal Department of Electrical and Instrumentation Engineering Thapar Institute of Engineering&TechnologyPatialaIndia Optical Devices and Systems CSIR-Central Scientific Instruments OrganizationChandigarh 160030India

Today,ship development has concentrated on electrifying ships in commercial and military applications to improve efficiency,support highpower missile systems and reduce ***,the electric propulsion of the shipboard system experiences torque fluctuation,thrust,and power due to the rotation of the propeller shaft and the motion of *** order tomeet these challenges,a new solution is *** paper explores hybrid energy management systems using the battery and ultracapacitor to control and optimize the electric propulsion *** battery type and ultracapacitor are ZEBRA and MAXWELL,*** 3-,4-and 5-blade propellers are considered to produce power and move *** loss factor has been reduced,and the sea states have been found through the Elephant Herding Optimization *** efficiency of the proposed system is greatly enhanced through torque,thrust and *** model predictive controller control strategy is activated to reduce load torque and drive system Root Average Square(RMS)*** implementations are conducted under the MATLAB *** values for torque,current,power,and error are measured and ***,the performance of the proposed methodology is compared with other available algorithms such as BAT and Dragonfly(DF).The simulation results show that the results of the proposed method are superior to those of various techniques and algorithms such as BAT and Dragonfly.

关键词： Dynamic model of the ship elephant herding optimization energy management schemes propeller ultra-capacitor zebra batteries

SmartCrawler:A Three-Stage Ranking Based Web Crawler for Harvesting Hidden Web Sources

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2021年第12期69卷 2933-2948页

作者： Sawroop Kaur aman Singh G.Geetha Mehedi Masud Mohammed A.Alzain Computer Science and Engineering Lovely Professional University144411PunjabIndia CEO Advanced Computing Research SocietyTamil NaduIndia Department of Computer Science Taif UniversityTaif21944Saudi Arabia Department of Information Technology College of Computer and Information TechnologyTaif UniversityTaif21944Saudi Arabia

Web crawlers have evolved from performing a meagre task of collecting statistics,security testing,web indexing and numerous other *** size and dynamism of the web are making crawling an interesting and challenging *** have tackled various issues and challenges related to web *** such issue is efficiently discovering hidden web *** crawler’s inability to work with form-based data,lack of benchmarks and standards for both performance measures and datasets for evaluation of the web crawlers make it still an immature research *** applications like vertical portals and data integration require hidden web *** of the existing methods are based on returning top k matches that makes exhaustive crawling *** documents which are ranked high will be returned multiple *** low ranked documents have slim chances of being *** the hidden web sources and ranking them based on relevance is a core component of hidden web *** problem of ranking bias,heuristic approach and saturation of ranking algorithm led to low *** research represents an enhanced ranking algorithm based on the triplet formula for prioritizing hidden websites to increase the coverage of the hidden web crawler.

关键词： Hidden web coverage adaptive link ranking query selection depth crawling

Synthesis and Single Crystal X-ray Studies of 3-(3,5-Bis(trifluoromethyl)phenyl) Quinoline and 3-(4-Fluoro-3-methylphenyl) Quinoline

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2014年第1期33卷 90-96页

作者： Malik aman Ullah Muhammad Adeel Muhammad Nawaz Tahir Muhammad Raza Shah Irfan Ullah Department of Chemistry Gomal University Department of Physics University of Sargodha ICCBS HEJ Research Institute of ChemistryUniversity of Karachi

The title compounds 3-（3,5-bis（trifluoromethyl）phenyl）quinoline （1） and 3-（4- fluoro-3-methylphenyl）quinoline （2） were synthesized through Suzuki-Miyaura Cross coupling reaction of 3-bromoquinoloine with aryl boronic acids. The title compounds were characterized by single-crystal X-ray diffraction, 1H NMR, 13C NMR, El-MS, elemental analysis and IR. The crystals of 3-（3,5-bis（trifluoromethyl）phenyl）quinoline （C17H9F6N, Mr = 341.25） belongs to the monoclinic system, space group P21n, a = 12.3072（13）, b = 4.9378（6）, c = 24.493（2） A, V= 1473.1（3） A3, Z = 4, Dc = 1.539 Mg m-3, 2 - 0.71073A, μ = 0.144 mm^-1, F（000） = 688, the final R = 0.0715 and wR = 0.1873 for 1875 obserwed reflections with I 〉 2σ（I） and the crystal of 3-（4-fluoro-3- methylphenyl）quinoline （C16H12FN, Mr= 237.27） belongs to the orthorhombic system, space group Pca21, a = 23.794（2）, b = 3.9094（3）, c = 25.669（2） A, V = 2387.7（4） A3, Z = 8, D, = 1.320 Mg m-3, 2 = 0.71073 A, μ = 0.088 mm-1, F（000） = 992, the final R = 0.0534 and wR = 0.1188 for 2270 observed reflections with I 〉 2σ（I）.

关键词： 3-bromoquinoline crystal structure Pd(PPh3)3 boronic acid suzuki coupling

Modeling,Parameter Measurement,and Control of PMSG-based Grid-connected Wind Energy Conversion System

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

Journal of Modern Power Systems and Clean Energy 2021年第5期9卷 1054-1065页

作者： Mohammad Kamruzzaman Khan Prince Graduate Mohammad TArif Ameen Gargoom aman MTOo Md Enamul Haque Renewable Energy&Electric Vehicle(REEV)Lab Centre for Smart Power&Energy Research(cSPER)School of EngineeringDeakin UniversityWaurn pondsAustralia

The design of reliable controllers for wind energy conversion systems(WECSs)requires a dynamic model and accurate parameters of the wind *** this paper,a dynamic model and the parameter measurement and control of a direct-drive variable-speed WECS with a permanent magnet synchronous generator(PMSG)are *** experimental method is developed for measuring the key parameters of the *** measured parameters are used in the design of the *** generator-side converter is controlled using a vector control scheme that maximizes the power extraction under varying wind speeds.A model predictive controller(MPC)is designed for the grid-side voltage source converter(VSC)to regulate the active and reactive power flows to the power grid by controlling the d-and q-axis currents in the synchronous reference *** MPC predicts the future values of the control variables and takes control actions based on the minimum value of the cost *** comply with the grid code requirement,a modified design approach for an LCL filter is presented and incorporated into the *** design process is simple and incorporates significant filter parameters while avoiding iterative *** comparative analysis of the designed filter with conventional L,LC,and iterative LCL filters demonstrates the effectiveness of the modified design *** proposed wind energy system with MPC and LCL filter is simulated in MATLAB/Simulink and experimentally implemented in the laboratory using the dSpace digital signal processor(DSP)*** simulation and experimental results validate the efficacy of the designed controllers using the measured parameters and show dynamic and steady-state performance under varying wind speeds.

关键词： Wind energy permanent magnet synchronous generator(PMSG) parameter measurement model predictive controller(MPC) LCL filter

Human Factors While Using Head-Up-Display in Low Visibility Flying Conditions

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

Intelligent Automation & Soft Computing 2023年第5期36卷 2411-2423页

作者： Jhulan Kumar Surender Singh Saini Divya Agrawal Vinod Karar aman Kataria Academy of Scientific and Innovative Research(AcSIR) Ghaziabad201002India CSIR-Central Scientific Instruments Organisation 160030India

Flying an aircraft in low visibility is still a challenging task for the *** requires precise and accurate situational awareness(SA)in real-time.A Head-up Display(HUD)is used to project collimated internal and externalﬂight information on a transparent screen in the pilot’s forwardﬁeld of view,which eliminates the change of eye position between Head-Down-Display(HDD)instru-ments and outer view through the *** of HUD increases the SA and reduces the workload for the *** to provide a betterﬂying capability for the pilot,projecting extensive information on HUD causes human factor issues that reduce pilot performance and lead to accidents in low visibility *** literature shows that human error is the leading cause of more than 70%of aviation *** this study,the ability of the pilot able to read background and symbology information of HUD at a different level of back-ground seen complexity,such as symbology brightness,transition time,amount of Symbology,size etc.,in low visibility conditions is *** result shows that increased complexity on the HUD causes more detection errors.

关键词： HUD avionics human factor situational awareness background complexity

Ameliorating impaired cardiac function in myocardial infarction using exosome-loaded gallic-acid-containing polyurethane scaffolds

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Bioactive Materials 2024年第3期33卷 324-340页

作者： Ankita Das aman Nikhil Parvaiz Ahmad Shiekh Babita Yadav Kumaravelu Jagavelu Ashok Kumar Department of Biological Sciences and Bioengineering Indian Institute of Technology KanpurKanpur208016U.P.India SMART Lab Centre for Biomedical EngineeringIndian Institute of Technology DelhiHauz KhasNew Delhi 110016India Department of Pharmacology Council of Scientific and Industrial Research(CSIR)-Central Drug Research InstituteLucknow226031U.P.India Centre for Environmental Sciences and Engineering Indian Institute of Technology KanpurKanpur208016U.P.India Centre of Excellence for Orthopaedics and Prosthetics Gangwal School of Medical Sciences and TechnologyIndian Institute of Technology KanpurKanpur208016U.P.India The Mehta Family Centre for Engineering in Medicine Indian Institute of Technology KanpurKanpur208016U.P.India Department of Biological Sciences and Bioengineering Indian Institute of Technology KanpurKanpur208016U.P.India.

Myocardial infarction(MI)can be tackled by implanting cardiac patches which provide mechanical support to the ***,most tissue-engineered scaffolds face difficulty in attenuating oxidative stress,maintaining mechanical stability,and regenerating damaged ***,we fabricated elastic cryogels using polyurethane modified with antioxidant gallic acid in its backbone(PUGA)and further coated them with decellularized extracellular matrix(dECM)to improve adhesiveness,biocompatibility and *** scaffold was functionalized with exosomes(EXO)isolated from adipose-derived stem cells having regenerative ***-dECM+EXO was tested in a rat model with induced MI where echocardiography after 8 weeks of implantation showed significant recovery in treatment *** analysis revealed a decrease in fibrosis after application of patch and promotion of angiogenesis with reduced oxidative stress was shown by *** of cardiac tissue contractile function marker was also observed in treatment ***,the proposed biomaterial has a promising application to be utilized as a patch for cardiac *** detailed studies with larger animal species are needed for using these observations for specific applications.

关键词： Antioxidant Polyurethane Gallic acid Myocardial infarction Cardiac regeneration

Maternal and fetal outcomes in term premature rupture of membrane

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Emergency Medicine 2016年第2期7卷 147-152页

作者： Tigist Endale Netsanet Fentahun Desta Gemada Mamusha aman Hussen Southern Nations Nationalities and Peoples Regional State Health Bureau Hawassa Ethiopia Department of Health Education and Behavioural Sciences College of Public Health and Medical Sciences Jimma University Jimma Ethiopia Department of Epidemiology College of Public Health and Medical Sciences Jimma University Jimma Ethiopia

BACKGROUND: Premature rupture of membrane(PROM) is linked to significant maternal prenatal mortalities and morbidity. In Ethiopia, where maternal mortality is still high, the maternal and fetal outcomes in PROM is very important to decrease maternal and child mortality and for better management and prevention of complications. Thus, this study aimed to detect the maternal and fetal outcomes and associated factors in term PROM at Mizan-aman General Hospital, south-west ***: A retrospective cross sectional study was conducted using data available at Mizanaman General Hospital during a period of 3 years(January 2011 to December 2013). We examined records of 4 525 women who gave birth in the hospital; out of these women, 185 were diagnosed with term PROM and all of them were included in the study. The data of these women were collected using a checklist based on registration books. The data were analyzed using SPSS version 20.0 statistical package. The association between independent and dependent variables was assessed by bivariate and multiple logistic regression analyses. 95%CI and P value less than 0.05 were considered statistically signifi ***: Of the 4 525 women who gave birth in the hospital, 202 were complicated by term PROM. About 22.2% of the women showed unfavorable maternal outcomes. The most common cause of maternal morbidity and mortality was puerperal sepsis. About 33.5% of neonates experienced unfavorable outcomes. The duration of PROM >12 hours(AOR=5.6, 95%CI 1.3–24.1) latency >24 hours(AOR=2.8, 95%CI 1.7–11.8), residing in rural areas(AOR=4.2, 95%CI 3.96–29.4) and birth weight less than 2 500 g were associated with unfavorable ***: Women residing in rural areas, long latency, and neonates with birth weight less 2 500 g may have unfavorable outcomes. Therefore, optimum obstetric and medical care is essential for the reduction of the devastating complications related to disorders.

关键词： Premature rupture of membrane Maternal outcomes Fetal outcomes

An alarming scenario in developing world:A looming of viral outbreaks

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

Asian Pacific Journal of Tropical Medicine 2022年第9期15卷 427-428页

作者： Faheem Anwar Abdullah Shazma Wahab Komal aman Ihteshamul Haq Department of Biotechnology and Genetic Engineering Hazara UniversityMansehra21300KPPakistan School of Biomedical Engineering Tianjin UniversityTianjin 300072China Department of Health and Biological Sciences Abasyn University PeshawarCEP 25000PeshawarPakistan

Pakistan has suffered from various infectious diseases including dengue,Crimean-Congo hemorrhagic fever(CCHF),polio and COVID-19 in the recent past[1,2].As per the World Health Organization reports(September 2022),609.84 million confirmed cases have been reported globally with 6.5 million *** through developing nations,Pakistan has documented the highest ratio of COVID-19(approximately 1.5 million)cases with approximately 30000 deaths since the first case was reported on 26th February 2020[3].In line,dengue epidemics are at their peak during monsoons and post-monsoons season(September-October).

关键词： diseases globally approximate

Elevation of TRIM44 potentiates propagation of gastric cancer stem cells

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Genes & Diseases 2022年第5期9卷 1156-1159页

作者： Hai Zhua Gang Wang Qikai Sun Haixing Zhu aman Xu Department of General Surgery The First Affiliated Hospital of Anhui Medical UniversityHefeiAnhui 230022PR China Department of General Surgery The First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhui 230001PR China

Gastric cancer stem cells(CSCs),which refer to treatment-refractory and self-renewal cell populations,are critically involved in the initiation and progression of gastric cancer(GC).1 Although gastric CSCs populations have been validated across multiple studies,2 the precise molecular mechanisms of gastric CSCs properties maintenance remain *** evidences have highlighted the role of tripartite-motif(TRIM)family members in regulating CSCs self-renewal and differentiation through protein ubiquitination modification.3 However,the effects of TRIM family members on GC and gastric CSCs have not been elucidated.

关键词： gastric cancer Gastric