检索结果-南通市图书馆

State of Health Estimation of LiFePO_(4) Batteries for Battery Management 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11期73卷 3149-3164页

作者： Areeb Khalid Syed Abdul Rahman Kashif Noor Ul Ain ali nasir Department of Electrical Engineering University of Engineering and TechnologyLahorePakistan Department of Electrical Engineering University of Central PunjabLahorePakistan

When considering the mechanism of the batteries,the capacity reduction at storage(when not in use)and cycling(during use)and increase of internal resistance is because of degradation in the chemical composition inside the *** optimize battery usage,a battery management system(BMS)is used to estimate possible aging effects while different load profiles are requested from the *** is specifically seen in a case when the vehicle is connected to the net(online through BMS).During this process,the BMS chooses the optimized load profiles based on the least aging effects on the battery *** major focus of this paper is to design an algorithm/model for lithium iron phosphate(LiFePO4)*** model of the batteries is based on the accelerated aging test data(data from the beginning of life till the end of life).The objective is to develop an algorithm based on the actual battery trend during the whole life of the *** the analysis of the test data,the complete trend of the battery aging and the factors on which the aging is depending on is identified,the aging model can then be recalibrated to avoid any differences in the production process during cell *** validation of the model was carried out at the end by utilizing different driving profiles at different C-rates and different ambient temperatures.A Linear and non-linear model-based approach is used based on statistical *** parameterization was carried out by dividing the data into small chunks and estimating the parameters for the individual ***-adaptive characteristic map using a lookup table was also *** nonlinear model was chosen as the best candidate among all other approaches for longer validation of 8-month data with real driving data set.

关键词： Aging model state of health lithium-ion cells battery management system state of charge battery modeling

Stochastic maximum power point tracking of photovoltaic energy system under partial shading conditions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Protection and Control of Modern Power Systems 2021年第1期6卷 383-395页

作者： Bushra Iqbal ali nasir ali Faisal Murtaza Department of Electrical Engineering University of Central PunjabLahorePakistan

A large portion of the available power generation of a photovoltaic (PV) array could be wasted due to partial shading, temperature and irradiance effects, which create current/voltage imbalance between the PV modules. Partial shading is a phenomenon which occurs when some modules in a PV array receive non-uniform irradiation due to dust, cloudy weather or shadows of nearby objects such as buildings, trees, mountains, birds etc. Maximum power point tracking (MPPT) techniques are designed in order to deal with this problem. In this research, a Markov Decision Process (MDP) based MPPT technique is proposed. MDP consists of a set of states, a set of actions in each state, state transition probabilities, reward function, and the discount factor. The PV system in terms of the MDP framework is modelled first and once the states, actions, transition probabilities, and reward function, and the discount factor are defined, the resulting MDP is solved for the optimal policy using stochastic dynamic programming. The behavior of the resulting optimal policy is analyzed and characterized, and the results are compared to existing MPPT control methods.

关键词： Maximum power point tracking Markov decision process Photovoltaic energy systems Partial shading

Carbonized waste milk powders as cathodes for stable lithium-sulfur batteries with ultra-large capacity and high initial coulombic efficiency

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Green Energy & Environment 2022年第5期7卷 1071-1083页

作者： Rabia Khatoon Sanam Attique Rumin Liu Sajid Rauf nasir ali Luhong Zhang Yu-Jia Zeng Yichuan Guo Yusuf Valentino Kaneti Jongbeom Na Haichao Tang Hongwen Chen Yang Tian Jianguo Lu State Key Laboratory of Silicon Materials Key Laboratory for Biomedical Engineering of Ministry of EducationSchool of Materials Science and EngineeringZhejiang UniversityHangzhou310027China Institute for Composites Science Innovation School of Materials Science and EngineeringZhejiang UniversityHangzhou310027China Hubei Collaborative Innovation Centre for Advanced Organic Chemical Materials Faculty of Physics and Electronic ScienceHubei UniversityWuhanHubei430062China State Key Laboratory for Silicon Materials Key Laboratory of Quantum Technology and DevicesDepartment of PhysicsZhejiang UniversityHangzhou310027China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen518060China International Center for Materials Nanoarchitectonics(WPI-MANA) National Institute for Materials Science(NIMS)1-1NamikiIbaraki305-0044Japan School of Chemical Engineering&Australian Institute for Bioengineering and Nanotechnology(AIBN) The University of QueenslandBrisbaneQLD4072Australia

To explore the natural resources as sustainable precursors offers a family of green *** use of bio-waste precursors especially the remaining from food processing is a scalable,highly abundant,and cost-effective *** waste materials is highly important especially for new materials discovery in emerging energy storage technologies such as lithium sulfur batteries(LSBs).Herein,waste milk powder is carbonized and constructed as the sulfur host with the hollow micro-/mesoporous framework,and the resulting carbonized milk powder and sulfur(CMP/S) composites are employed as cathodes for *** is revealed that the hollow micro-/mesoporous CMP/S framework can not only accommodate the volume expansion but also endow smooth pathways for the fast diffusion of electrons and Li-ions,leading to both high capacity and long cycling *** CMP/S composite electrode with 56 wt% loaded sulfur exhibits a remarkable initial capacity of 1596 mAh g^(-1) at 0.1 C,corresponding to 95% of the theoretical *** at a rate of 1 C,it maintains a high capacity of 730 mAh g^(-1) with a capacity retention of 72.6% after 500 cycles,demonstrating a very low capacity fading of only 0.05% per ***,the Coulombic efficiency is always higher than 96%during all the *** only used source material is expired waste milk powders in our *** believe that this "trash to treasure" approach will open up a new way for the utilization of waste material as environmentally safe and high performance electrodes for advanced LSBs.

关键词： composites powders initial

Winding Inductance and Performance Prediction of a Switched Reluctance Motor with an Exterior-rotor Considering the Magnetic Saturation

在线全文

学校读者我要写书评

暂无评论

CES Transactions on Electrical Machines and Systems 2021年第3期5卷 212-223页

作者： Minjie Zhang nasir ali Qiang Gao the Department of Electrical Engineering Shanghai Jiao Tong UniversityShanghaiChina Key Laboratory of Control of Power Transmission and Conversion Shanghai Jiao Tong UniversityMinistry of EducationChina200240

This paper deals with an analytical method to effectively calculate the inductance of an exterior-rotor switched reluctance motor(SRM),which evaluates the winding inductance of both the active section and the end section,accounting for the influence of core *** to the inductance calculated by the analytical model,the flux linkage table and torque table can be established,and the steady state performance such as phase current,flux linkage,copper loss and core loss can be *** of this method is verified by the finite element method as well as by experimental results of a 12/8 SRM prototype.

关键词： Analytical approach Exterior-rotor switched reluctance motor Magnetic saturation Inductance

Strategies to improve aerobic granular sludge stability and nitrogen removal based on feeding mode and substrate

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2019年第10期31卷 144-154页

作者： Quan Yuan Hui Gong Hao Xi Heng Xu Zhengyu Jin nasir ali Kaijun Wang State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnuironmentTsinghua Uniuersity

A systemic strategy was proposed to improve aerobic granular sludge(AGS)stability and nitrogen(N)removal efficiency by optimizing feeding mode and substrate aiming at complicated wastewater *** functional groups at the genus level identified by high-throughput sequencing were evaluated as *** results showed that anaerobic feeding mode and acetate promoted the compact AGS formation with excellent total nitrogen(TN)removal efficiency(averaging 91.7%±4.1%)at various dissolved oxygen *** the aerobic feeding mode led to a loose AGS structure with a vulnerable anaerobic core and poor TN removal efficiency(averaging58.8%±7.4%).Simultaneous nitrification and denitrification process played the dominant role in N removal in compact AGS over the alternating nitrification and denitrification ***-concentration glucose undermined feast-famine condition with filamentous bacteria growth out of granule and decreased TN removal efficiency to 67.3%±15.2%.Lower food to microorganism ratio may result in a lower N removal rate attributed to the sharply increased biomass concentration fed by ***-oxidizing bacteria,nitrite-oxidizing bacteria,denitrifying bacteria,and denitrifying phosphorus accumulation organisms enriched during AGS granulation also contributed to the efficient N *** proposed strategy provided insights into the relationship between various factors and stable AGS formation,and systemic operation methods for various complicated wastewater treatment.

关键词： Aerobic granular sludge Feeding mode Substrate N removal Stability

Optical coherence tomography characteristics of responses to intravitreal bevacizumab in idiopathic choroidal neovascularization

在线全文

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2016年第2期9卷 271-274页

作者： Syed nasir ali Shah Qian-Yan Kang Xiao-Juan Fan Yue-Ming Sun Department of Ophthalmology the First Affiliated Hospital of Xi'an Jiaotong University

AIM： To investigate factors associated with responses to intravitreal bevacizumab （IVB） in naive idiopathic choroidal neovascularization （iCNV） by high domain optical coherence tomography （OCT）. METHODS： We retrospectively reviewed clinical data of 40 eyes of iCNV patients who received a single or multiple IVB on an as-needed basis （1.25 mg/0.05 mL）. One month after the first injection, subretinal fluid （SRF） volume was evaluated and the eyes were divided into 3 groups based on responses to IVB. Good, moderate, and poor responses were defined as 61%-99%, 30%-60%, and 〈30% resolution of SRF on OCT after IVB in iCNV, respectively. OCT findings were analyzed to find factors associated with difference in response levels. Comparisons were made using Wilcoxon＇s matched- pairs signed-rank test, the Mann-Whitney U test for means with continuous data and Fisher＇s exact test for categorical data. RESULTS： The mean number of IVB was 1.28±1.50 and mean follow up time was 3.60±1.20mo. At postoperative 1too, there were 8 （20%） eyes in good response, 20 （50%） in moderate response and 12 （30%） eyes in poor response group and at last visit there were 28 good responders （70%）, 8 （20%） moderate responders and 4 （10%） poor responders. Statistically significant difference was detected between good responders and non good responders in choroidal neovessels thickness （P=0.029）, SRF height （P=0.049） and SRF volume （P=0.031） at post treatment 1 mo. CONCLUSION： OCT is a valuable diagnostic tool. Decrease in choroidal neovessels thickness, SRF height and volume predicts favorable response of iCNV to IVB therapy.

关键词： bevacizumab idiopathic choroidalneovascularisation optical coherence tomography subretinalfluid

Forecasting cryptocurrency returns and volume using search engines

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Financial Innovation 2019年第1期5卷 29-41页

作者： Muhammad ali nasir Toan Luu Duc Huynh Sang Phu Nguyen Duy Duong Leeds Beckett University 520 Rose BowlLeeds LS13HBUK University of Economics Ho Chi Minh City Ho Chi Minh CityVietnam Banking University of Ho Chi Minh City Ho Chi Minh CityVietnam

In the context of the debate on the role of cryptocurrencies in the economy as well as their dynamics and forecasting,this brief study analyzes the predictability of Bitcoin volume and returns using Google search *** employed a rich set of established empirical approaches,including a VAR framework,a copulas approach,and non-parametric drawings,to capture a dependence *** a weekly dataset from 2013 to 2017,our key results suggest that the frequency of Google searches leads to positive returns and a surge in Bitcoin trading *** to search values have a positive effect,which persisted for at least a *** findings contribute to the debate on cryptocurrencies/Bitcoins and have profound implications in terms of understanding their dynamics,which are of special interest to investors and economic policymakers.

关键词： Financial innovation Forecasting Blockchain Google search values Bitcoin Cryptocurrencies

Ultrabroadband and multiband infrared/terahertz photodetectors with high sensitivity

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Photonics Research 2021年第11期9卷 2167-2175页

作者： JIAQI ZHU HE ZHU MENGJUAN LIU YAO WANG HANLUN XU nasir ali HUIYONG DENG ZHIYONG TAN JUNCHENG CAO NING DAI HUIZHEN WU Hangzhou Institute for Advanced Study University of Chinese Academy of SciencesHangzhou 310024China Zhejiang Province Key Laboratory of Quantum Technology and Devices Department of Physicsand State Key Laboratory of Silicon MaterialsZhejiang UniversityHangzhou 310027China State Key Laboratory for Infrared Physics Shanghai Institute of Technical PhysicsChinese Academy of SciencesShanghai 200083China Key Laboratory of Terahertz Solid-State Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Broadband response is pursued in both infrared(IR)and terahertz(THz)detection technologies,which find their applications in both terrestrial and astronomical ***,we report an ultrabroadband and multiband IR/THz detector based on blocked-impurity-band detecting *** detectors are prepared by implanting phosphorus into germanium(Ge:P),where photoresponses with a P impurity band,a self-interstitial defect band,and a vacancy-P(V-P)pair defect band are realized *** response spectra of the detectors show ultrabroad and dual response bands in a range of 3-28μm(IR band)and 40-165μm(THz band),***,a tiny mid-IR(MIR)band within 3-4.2μm is embedded in the IR *** THz band arises from the P impurity band,whereas the IR and the MIR bands are ascribed to the two defect ***150 m V and 4.5 K,the peak detectivities of the three bands are obtained as 2.9×10^(12) Jones(at 3.9μm),6.8×10^(12) Jones(at 16.3μm),and 9.9×10^(12) Jones(at 116.5μm),*** impressive coverage andsensitivity of the detectors are promising for applications in IR and THz detection technologies.

关键词： multiband bands defect

Antioxidant potential of Rumex vesicarius L.:in vitro approach

在线全文

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Biomedicine 2014年第7期4卷 538-544页

作者： Tajdar Husain Khan Majid Ahmad Ganaie nasir ali Siddiqui Aftab Alam Mohd Nazam Ansari Department of Pharmacology College of Pharmacy.Salman Bin Abdulaziz University Department of Pharmacognosy College of PharmacyKing Saud University Department of Pharmacognosy.College of Pharmacy Salman Bin Abdulaziz University

Objective:To assess in-vitro antioxidant activity of different fraction and perform high performance thin layer chromatography fingerprint analysis of most active fraction of Rumex vesicarius L.(***).Methods:In the present study,acetone,ethyl acetate,n-butanol,and methanol extracts of *** were evaluated for radical scavenging activity by studying the inhibition of the level of lipid peroxidation induced by Fe(++)/ascorbate,DNA sugar damage,scavenging of hydrogen peroxide,diphenylphosphine DPPH radical scavenging activity,total phenolic content,total flavonoids content and total *** performance thin layer chromatography finger print profiling of *** *** also ***:Lipid peroxidation induced by the iron/ascorbate system,hydrogen peroxide,diphenylphosphine and DNA sugar damage were inhibited by the addition of different extract of *** them,methanolic extract showed maximum *** methanolic extract showed the highest total phenolic,total flavonoids and total proanthocyanidin ***:The results suggest that the extracts can be a vital source of phytochemical antioxidants.

关键词： Rumex vesicarius L. DNA sugar damage DPPH antioxidant HPTLC