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Framework for fault-tolerant speed tracking control of gasoline engines using the first principle-based engine model

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Journal of Control and Decision 2023年第4期10卷 560-571页

作者： Raheel Anjum Ahmed Yar ghulam murtaza Qadeer Ahmed Aamer I.Bhatti Controls and Signal Processing Research group(CASPR) Capital University of Science and TechnologyIslamabadPakistan Department of Mechanical Engineering College of E&MENational University of Sciences and TechnologyIslamabadPakistan Center for Automotive Research The Ohio State UniversityColumbusOHUSA Department of Electrical Engineering Capital University of Science and TechnologyIslamabadPakistan

Optimal engine torque management,a fundamental objective,depends predominantly on engine speed tracking *** ensures to attain desired speed profile in the presence of uncertainties,disturbances and *** the other hand,certain requirements such as emissions control,fuel efficiency and drivability are degraded in case of poorspeed ***,constraints on engine speed tracking performance are even more stringent for hybrid power-train architecture as crankshaft speed and engine torque are the basic variables for coordinated *** tracking is also considered essential for gearshift control ofthe automatic *** this research work,a framework for fault-tolerant speed tracking of the gasoline engine is proposed using the First Principle-based Engine Model(FPEM).A high-fidelity direct relationship between fuel injection input and engine speed is derived by the transformation of *** is induced in the fuel injection subsystem to generate the torque *** the proposed framework,a second-order sliding mode-based control technique is applied to track desired speed profile by mitigating the faultsin the fuel injection *** data acquired from the engine test rig is used to demonstrate the offline validity and fault tolerance capabilities of the proposed framework in MATLAB/Simulink.

关键词： Engine speed tracking fault-tolerant control gasoline engines sliding mode control

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Energy transport for ion acoustic waves in a spin polarized quantum plasma

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Communications in Theoretical Physics 2020年第1期72卷 124-129页

作者： M Ayub Z Iqbal H A Shah g.murtaza Salam Chair Department of PhysicsG.C.UniversityKatchery RoadLahore 54000Pakistan Department of Physics G.C.UniversityKatchery RoadLahore 54000Pakistan Department of Physics Mirpur University of Science and TechnologyMirpur-10250(AJK)Pakistan

The separate spin evolution quantum hydrodynamics(SSE-QHD)model is used to investigate the energy behavior for ion acoustic waves in degenerate quantum *** results show that the energy flow speed decreases with spin polarization *** is also shown that it decreases with the increasing rate up to a certain range of wave number and then it goes to zero *** is observed that Bohm potential suppresses the energy flow *** is also noticed that the energy flow speed deviates from the group velocity even in the absence of Bohm potential ***,the contribution of of Bohm poential effect in spin polarized plasma reduces the extent of deviation.

关键词： spin polarization quantum plasma ion acoustic wave energy flow speed

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Prognostic value of hematological parameters in older adult patients with acute coronary syndrome undergoing coronary intervention:a single centre prospective study

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老年心脏病学杂志:英文版 2023年第8期20卷 596-601页

作者： Umar Hafiz Khan murtaza Rashid Pala Imran Hafeez Afshan Shabir Amrit Dhar Hilal Ahmad Rather geriatric Medicine Department of Internal MedicineSher-i-Kashmir Institute of Medical SciencesSrinagarIndia Department of Internal Medicine Sher-i-Kashmir Institute of Medical SciencesSrinagarIndia Department of Cardiology Sher-i-Kashmir Institute of Medical SciencesSrinagarIndia Department of Internal and Pulmonary Medicine Sher-i-Kashmir Institute of Medical SciencesSrinagarIndia

BACKgROUND Cardiovascular disease is a significant contributor to the disease burden in geriatric *** systemic inflammation is thought to be the cause of age-related changes in the bone marrow and a major risk factor for *** purpose of the study was to assess the accuracy of these hematological biomarkers in predicting 30-day mortality in older patients with acute coronary syndrome(ACS).METHODS This was a prospective observational study of 601 older adult patients(age>60 years)with ACS who underwent percutaneous coronary intervention over two years(2017-2019).The relationship between baseline hematological parameters and mortality was assessed during the 30-day *** regression analysis and receiver operating characteristic curve analysis were done to evaluate for diagnostic accuracy of various hematological *** The mean age of presentation was 77±17 *** mean neutrophil-lymphocyte ratio(NLR)value was 5.07±4.90 and the mean platelet-lymphocyte ratio(PLR)value was 108.65±*** univariate analysis,total leucocyte count[odds ratio(OR)=0.85,P=0.021],hematocrit(OR=0.91,P=0.018),NLR(OR=1.10,P=0.001)and PLR(OR=1.05,P=0.001)were associated with *** receiver operating characteristic curve analysis,NLR predicted mortality with 68.1%and PLR with 65.7%*** multivariate analysis,NLR(OR=1.096,95%CI:1.006-1.15,P=0.035)was an independent predictor of 30-day *** For the risk classification of all elderly ACS patients,we highly advise using NLR rather than the total white blood cell count.

关键词： patients coronary prospective

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A Robust MPPT Control Based on Double Ended Forward Converter Architecture

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Computers, Materials & Continua 2022年第1期70卷 135-150页

作者： M.Usman Khan K.M.Hasan A.Faisal murtaza H.M.Usman Hadeed A.Sher University of Engineering&Technology Lahore54000Pakistan University of Central Punjab Lahore54000Pakistan ghulam Ishaq Khan Institute of Engineering Sciences and Technology Swabi23430Pakistan

In this paper,a stand-alone photovoltaic(PV)system based on a Double Ended Forward Converter(DEFC)is *** proposed converter is specified for 48 V,100Wapplications as most of the equipment used in telecommunication and aircraft fall in this *** literature has limited potential application of DEFCin PV *** research work deals with an in-depth study of DEFCand proposes an improvedDEFCfor PV applications with battery ***,a bi-directional dc-dc converter for the battery is integrated to track theMaximumPower Point(MPP)of the PV *** converter is examined under variable irradiance and load conditions,and the analytical analysis of boundary conditions are *** converter’s architecture also ensures built-in I-V curve tracing for the identification of MPP of PV *** offers low voltage stresses across switches and avoids sinking power supply and core resetting *** topology’s behavior is analyzed based onMPP achievement and maintaining output under different conditions of battery backup availability,environmental,and load *** PV system architecture is designed and analyzed theoretically and verified with simulations on the PSIM software.

关键词： Photovoltaic power converter forward converter double ended forward converter bi-directional dc-dc converter MPP I-V curve tracing

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Predicting chemical speciation of metals in soil using Visual Minteq

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Soil Ecology Letters 2023年第3期5卷 53-60页

作者： Sana Khalid Muhammad Shahid Zeid A.ALOthman Abdullah A.Al-Kahtani Behzad murtaza Camille Dumat Department of Environmental Sciences COMSATS University IslamabadVehari 61100Pakistan Department of Chemistry College of ScienceKing Saud UniversityRiyadh 11451Saudi Arabia DYNAFOR INRAE&Toulouse INP France CERTOP CNRS-UT2J-UPS France

From soil contamination and risk assessment perspectives,it is imperative to understand the ecological processes occurring in *** soil processes greatly affect chemical speciation of potentially toxic metals(PTMs),and thus also influence their biogeochemical *** current study analyzed chemical speciation of eight PTMs(Cd,Cr,Fe,Cu,Mn,Ni,Zn,and Pb)in upper and lower soil layers for 15 agronomic fields of Vehari-Pakistan using Visual Minteq *** divalent forms of most PTMs(PTM^(2+))generally predominated in both soil layers(79.9%overall occurrence).However,chromium revealed a different pattern of chemical speciation(95.8%as CrOH^(+))compared to other *** mean percentage of all the PTMs2+was slightly higher for the lower soil layer(81.3%)than in the upper layer(78.4%),the trend being same for all the PTMs,except *** higher PTMs^(2+)percentage in lower soil layers than upper layers was due to lower content of organic matter and other anions such as Cl^(−)and HCO_(3)_(−).The mean percentage ages of all the PTMs^(2+)was similar among all the 15 agronomic fields,which was confirmed by strong Pearson correlation values(R^(2)>0.95).The PCA graph grouped all the agronomic fields and PTM^(2+) closely,except Cr^(2+) and Cu^(2+).This grouping confirmed the similar chemical speciation of PTMs,except Cu and Cr in studied fields.

关键词： heavy metals free ionic forms agricultural soils multivariate analysis PCA

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The effect of replacing pnictogen elements on the physical properties of SrMg_2X_2(X=N,P,As,Sb,Bi) Zintl compounds

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Chinese Physics B 2018年第4期27卷 369-375页

作者： g.murtaza Abdul Ahad Khan M Yaseen A Laref Naeem Ullah Inayat ur Rahman Materials Modelling Labortary Department of PhysicsIslamia College University Department of Physics University of the Peshawar Department of Physics University of AgricultureFaisalabad Department of Physics and Astronomy College of ScienceKing Saud University Department of Physics City University of Hong Kong

The effect of replacing the anion from N to Bi down the group in the periodic table is investigated on SrMg2X2（X = N,P,As,Sb,Bi）.A full potential linearized augmented plane wave plus local orbitals method is used along with different exchange–correlation potentials to obtain the lattice constants,phonons,electronic,and optical properties of the Sr Mg2X2（X = N,P,As,Sb,Bi） Zintl compounds.A good agreement is achieved and our calculations are validated by previous experimental and theoretical *** compounds have shown stable dynamical behavior with gamma centered longitudinal response having no imaginary *** band structures reveal the semiconducting nature of the *** Pnictogen（X）-p state contributed mainly in the valence band and the Sr-d state forms the conduction of the *** charge transfer and low overlapping of the atomic densities indicates the preferable ionic bonding character of these *** the optical properties,real and imaginary parts of dielectric function,complex refractive index,birefringence,reflectivity,and optical conductivity are *** compounds can be utilized in the optical and optoelectronic devices.

关键词： Zintl compounds band structure optical response

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Comparative study on nutrient composition and antioxidant capacity of potato based on geographical and climatic factors

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Food Bioscience 2022年第2期46卷 375-385页

作者： Bing Zhang Ayesha murtaza Aamir Iqbal Jiao Zhang Tingting Bai Wanlu Ma Xiaoyun Xu Siyi Pan Wanfeng Hu College of Food Science and Technology Huazhong Agricultural UniversityNo.1Shizishan StreetHongshan DistrictWuhan430070China Key Laboratory of Environment Correlative Dietology Huazhong Agricultural UniversityMinistry of EducationWuhan430070China College of Agriculture and Life Sciences Cornell UniversityIthacaNYUnited States

Potatoes are consumed in the human diet,but the environmental effects on the nutrient content of their tubers are not *** potato varieties from China(Chongqing,Dingxi,Qiqihar,Enshi,and Ulanqab)were selected to compare their nutritional components and antioxidant capacity and to explore the correlation between nutrition and local rainfall,humidity,temperature,and light *** results indicated the Qiqihar cultivar presents significantly higher antioxidant capacity,and has the most elevated protein and soluble sugar *** total phenol(TPC)(325.07μg/g)and carotenoid contents(54.93μg/100g)of the Ulanqab cultivar were the *** Dingxi cultivar reveals the highest total flavonoids(TFC)(168.94μg/g),K,Mg,and P *** ascorbic acid content(26.09 mg/100g)was the highest in the Chongqing cultivar,and the contents of starch,Ca,total acid,and water were also *** amino acid content(7.350%)in the Enshi cultivar is *** was found that soluble sugar was significantly correlated with humidity,temperature,and light time;carotenoids were affected considerably by rainfall;ascorbic acid has a strong correlation with temperature;TPC was moderately associated with humidity and light *** summarize,tubers’nutrient composition and antioxidant capacity vary with geographical location and climate of *** study will help provide a theoretical basis for selecting geographical areas for potato planting and exploring the complex interactive factors between environment and vegetable attributes.

关键词： Potato Cultivar Regions Nutritional component Antioxidant capacity

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Effect of different catalysts and growth temperature on the photoluminescence properties of zinc silicate nanostructures grown via vapor-liquid-solid method

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Chinese Physics B 2022年第5期31卷 657-665页

作者： ghfoor Muhammad Imran murtaza Rehan Abid Naeem Ahmad Department of Physics International Islamic UniversityIslamabad 44000Pakistan

We explore the photoluminescence properties of zinc silicate(Zn_(2)SiO_(4)) nanostructures synthesized by vapor-liquidsolid(VLS)mode of growth using three different catalysts(Sn,Ag,and Mn).Different catalysts significantly influence the growth rate which in turn has an impact on the structure and hence the photoluminescence of the prepared zinc silicate ***_(2)SiO_(4) has a wide bandgap of about 5.5 eV and in its pure form,it does not emit in visible region due to its inner shell electronic transitions between the 3 d5 energy ***,the incorporation of different catalysts(Sn,Ag and Mn)at different growth temperatures into the Zn_(2)SiO_(4) crystal growth kinetics provides wide visible spectral range of photoluminescence(PL)*** analysis shows broad multi-band spectrum in the visible region and distinct colors(red,yellow,green,blue,cyan and violet)are obtained depending on the crystalline structure of the prepared *** allowed transitions due to the effect of different catalysts on zinc silicate lattice offer a huge cross-section of absorption that generates strong *** correlation between the structural and optical properties of the synthesized nanostructures is discussed in *** synthesized photoluminescent nanostructures have potential applications in solidstate lighting and display devices.

关键词： nanostructures vapor-liquid-solid growth mode photoluminescence spectra fluorescence microscopy

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Factors affecting technical efficiency of small-scale apple farms in Balochistan Plateau, Pakistan

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Journal of Mountain Science 2017年第4期14卷 782-794页

作者： ghulam murtaza gopal Bahadur THAPA Disaster Management and Development Studies University of Balochistan School of Environment Resources and Development Asian Institute of Technology

In Balochistan, Agriculture is dominated by small-scale farmers and the apple production sector is confronted with the chronic constraint of low output per unit of input. Although some agricultural policies have been implemented in this province, studies on effectiveness and impacts of such policies over apple production and farmers' performance are still limited. This study is an effort to bridge the research gap on this potential crop in the plateau by investigating technical and scale efficiency of 181 officially designated small-scale apple farmers in mountainous district Mastung in Balochistan; then explored factors that underlie differences in production inefficiency. A two-stage input-oriented Data Envelopment Analysis(DEA) methodology was employed to evaluate technical and scale efficiency followed by truncated bootstrapped regression framework to analyze the correlative determinants to efficiency. Average technical and scale efficiencies of larger landholders were higher than medium and small landholders. Analysis indicated that there is still ample scope for inefficient sample farmers to reduce the input use by 33% without compromising the given yield level. Maximum contributions to the total input savings were from the use of urea, farm yard manure(FYM) and labor-use. Farmer's experience, farm ownership, irrigation constraints, and farmer's access to trainings, credit and extension services significantly affected apple farmers' technical efficiency. Based on the findings of this study, strategies are suggested to enhancing efficiencies by farmers' capacity development through effective extension services and trainings and provision of adequate credit.

关键词：技术效率小苹果巴基斯坦高原农场数据包络分析农业政策生产部门

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Synthesis and Characterization of Nano-hydroxyapatite Powder Using Wet Chemical Precipitation Reaction

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Journal of Materials Science & Technology 2014年第4期30卷 307-310页

作者： Syed Sibte Asghar Abidi Qasim murtaza Centre of Excellence in Materials Science(Nanomaterials) Aligarh Muslim University Mechanical and Production Engineering Department Delhi Technology University(Formerly Delhi College of Engineering)

Hydroxyapatite （HA） nano-powder was synthesized via wet chemical technique in a used precipitation reaction, in which Ca（OH）2 and H3PO4 were used as precursors. Deionised water was used as a diluting media for the reaction and ammonia was used to adjust the pH. The synthetic HA nano-powder has some medical applications such as a coating material in orthopaedic implants and in dental. HA powder has been studied at different temperatures from 100 to 800 ℃ to achieve the stoichiometric Ca/P ratio 1.667. The optimum temperature was found to be 600 ℃. Above this temperature, the HA powder decomposed to CaO. The crystallite size of HA powder was found to be in the range of 8.47-24.47 nm. The crystallographic properties were evaluated by X-ray diffraction, Fourier transform infrared spectroscopy, energy dispersive X- ray spectroscopy and scanning electron microscopy. The results show that, high purity of nano-hydroxyapatite powders could be obtained at low temperatures, and the crystallinity, crystallite size and Ca/P ratio of the resulting nanoparticles were found to be dependent on the calcination temperature. When Ca/P ratio exceeded 1.75, formation of CaO phase was observed.

关键词： Hydroxyapatite Nano-powder Synthesis Characterization

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