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Journal of Rare Earths 2019年第2期37卷 193-197页

作者： muhammad Ayub Iftikhar Hussain Gul Khalid Nawaz khurram Yaqoob Thermal Transport Laboratory School of Chemical and Materials Engineering (SCME) National University of Sciences and Technology (NUST)

In the current research work Ba_(1-x)La)xmn)yFe_(12-y)O_(19) hexa-ferrite nanoparticles of different compositions were synthesized using chemical co-precipitation technique. The structural properties were explored using X-ray diffractions(XRD), scanning electron microscopy(SEm) and Fourier transmission infrared spectroscopy(FTIR). XRD indexed pattern confirms the formation of m-type hexagonal phase. The crystallite size of synthesized samples ranges from 13 to 34 ± 2 nm. FTIR peaks observe also confirmed the presence of metaloxygen bond of the desired product. The position of peak at 467 cm^(-1) corresponds to A_2 u vibration for octahedral Fe(4+)-O and peak position E1 u corresponds to vibration of Fe(3+)O4 octahedral bonds. The band v_1 in range(677-559 cm^(-1)) and v_2 in frequency range(356-419 cm^(-1)) are associated to A and B *** properties of all compositions were measured with frequency. The dielectric constant, loss and tangent loss decrease from 26 to 9, 25 to 2 and 0.94 to 0.14, respectively with frequency. DC electrical resistivity is increased with dopant concentration increasing from 2.15 × 10~4 to 1.92 ×10~5 Ω·cm.

关键词： Co-precipitation Electrical properties Dielectric X-ray diffraction Rare earths

Hyperspectral anomaly detection:a performance comparison of existing techniques

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International Journal of Digital Earth 2022年第1期15卷 2078-2125页

作者： Noman Raza Shah Abdur Rahman m.maud Farrukh Aziz Bhatti muhammad Khizer Ali khurram Khurshid moazam maqsood muhammad Amin iVISION Lab Electrical Engineering DepartmentInstitute of Space TechnologyIslamabadPakistan AI Enabling Technologies Lab Center of Excellence in Artificial IntelligenceBahria UniversityIslamabadPakistan Department of Electrical and Computer Engineering Pak-Austria Fachhochschule:Institute of Applied Sciences and TechnologyHaripurPakistan Avionics Engineering Department Institute of Space TechnologyIslamabadPakistan

Anomaly detection in Hyperspectral Imagery(HSI)has received considerable attention because of its potential application in several *** anomaly detection algorithms for HSI have been proposed in the literature;however,due to the use of different datasets in previous studies,an extensive performance comparison of these algorithms is *** this paper,an overview of the current state of research in hyperspectral anomaly detection is presented by broadly dividing all the previously proposed algorithms into eight different *** addition,this paper presents the most comprehensive comparative analysis to-date in hyperspectral anomaly detection by evaluating 22 algorithms on 17 different publicly available *** indicate that attribute and edge-preserving filtering-based detection(AED),local summation anomaly detection based on collaborative representation and inverse distance weight(LSAD-CR-IDW)and local summation unsupervised nearest regularized subspace with an outlier removal anomaly detector(LSUNRSORAD)perform better as indicated by the mean and median values of area under the receiver operating characteristic(ROC)***,this paper studies the effect of various dimensionality reduction techniques on anomaly *** indicate that reducing the number of components to around 20 improves the performance;however,any further decrease deteriorates the performance.

关键词： Anomaly detection algorithms hyperspectral imagery deep learning dimensionality reduction

A panoramic view of Li_(7)P_(3)S_(11) solid electrolytes synthesis, structural aspects and practical challenges for all-solid-state lithium batteries

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Chinese Journal of Chemical Engineering 2021年第11期34卷 16-36页

作者： muhammad khurram Tufail Niaz Ahmad Le Yang Lei Zhou muhammad Adnan Naseer Renjie Chen Wen Yang Key Laboratory of Cluster Science of ministry of Education Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion materials School of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081China School of material Science and Engineering Beijing Institute of TechnologyBeijing 100081China Institute of Advanced Technology Beijing Institute of TechnologyJinan 250300China

The development of an inorganic electrochemical stable solid-state electrolyte is essentially responsible for future state-of-the-art all-solid-state lithium batteries(ASSLBs).Because of their advantages in safety,working temperature,high energy density,and packaging,ASSLBs can develop an ideal energy storage system for modern electric vehicles(EVs).A solid electrolyte(SE)model must have an economical synthesis approach,exhibit electrochemical and chemical stability,high ionic conductivity,and low interfacial *** to its highest conductivity of 17 mS·cm^(-1),and deformability,the sulfide-based Li_(7)P_(3)S_(11) solid electrolyte is a promising contender for the high-performance bulk type of ***,we present a current glimpse of the progress of synthetic procedures,structural aspects,and ionic conductivity improvement *** elucidation and mechanistic approaches have been extensively discussed by using various characterization *** chemical stability of Li_(7)P_(3)S_(11) could be enhanced via oxide doping,and hard and soft acid/base(HSAB)concepts are also *** issues to be undertaken for designing the ideal solid electrolytes,interfacial challenges,and high energy density have been *** review aims to provide a bird’s eye view of the recent development of Li_(7)P_(3)S_(11)-based solid-state electrolyte applications and explore the strategies for designing new solid electrolytes with a target-oriented approach to enhance the efficiency of high energy density allsolid-state lithium batteries.

关键词： Li_(7)P_(3)S_(11)solid electrolyte 30Li_(2)S-70P_(2)S_(5)glass ceramics Chemical stability Electrolyte/electrode interphase High energy density all-solid-state lithium batteries

Noisy ECG Signal Data Transformation to Augment Classification Accuracy

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Computers, materials & Continua 2022年第5期71卷 2191-2207页

作者： Iqra Afzal Fiaz majeed muhammad Usman Ali Shahzada khurram Akber Abid Gardezi Shafiq Ahmad Saad Aladyan Almetwally m.mostafa muhammad Shafiq Department of Information Technology University of GujratGujrat50700Pakistan Department of Computer Science University of GujratGujrat50700Pakistan Faculty of Computing The Islamia University of BahawalpurBahawalpur63100Pakistan Department of Computer Science COMSATS University IslamabadIslamabadPakistan Industrial Engineering Department College of EngineeringKing Saud UniversityP.O.Box 800Riyadh 11421Saudi Arabia Department of Information Systems College of Computer and Information SciencesKing Saud UniversityP.O.Box 800Riyadh11421Saudi Arabia Department of Information and Communication Engineering Yeungnam UniversityGyeongsan38541Korea

In this era of electronic health,healthcare data is very important because it contains information about human *** addition,the Internet of Things(IoT)revolution has redefined modern healthcare systems and management by providing continuous *** this case,the data related to the heart is more important and requires proper *** the analysis of heart data,Electrocardiogram(ECG)is *** this work,machine learning techniques,such as adaptive boosting(AdaBoost)is used for detecting normal sinus rhythm,atrial fibrillation(AF),and noise in ECG signals to improve the classification *** proposed model uses ECG signals as input and provides results in the form of the presence or absence of disease AF,and classifies other signals as normal,other,or *** article derives different features from the signal using maximal Information Coefficient(mIC)and minimum Redundancy maximum Relevance(mRmR)technique,and then classifies them based on their *** the ECG contains some kind of noise and irregular data streams so the purpose of this study is to remove artifacts from the ECG signal by deploying the method of Second-Order-Section(SOS)(filter)and correctly classify *** features were extracted to improve the detection of ECG *** with existing methods,this work gives promising results and can help improve the classification accuracy of the ECG signals.

关键词： ECG atrial fibrillation adaptive boosting heart rate variability

manipulation of SlmXl for enhanced carotenoids accumulation and drought resistance in tomato

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Science Bulletin 2016年第18期61卷 1413-1418页

作者： mohamed Ewas Yanqiang Gao Shouchuang Wang Xianqing Liu Hongyan Zhang Elsayed m. E. Nishawy Farhan Aii Raheel Shahzad khurram Ziaf Hizar Subthain Cathie martin Jie Luo National Key Laboratory of Crop Genetic Improvement andNational Center of Plant Gene Research (Wuhan) Huazhong Agricultural University Wuhan 430070 China College of Life Science and Technology Huazhong Agricultural University Wuhan 430070 China Key Laboratory of Horticultural Plant Biology Ministry of Education Huazhong Agricultural University Wuhan 430070China John Innes Centre Norwich Research Park Colney Norwich NR4 7UH UK

Plants are the ultimate source of nutrients in the human diet. To ensure adequate availability of high quality food for an increasing world population, traits including improved tolerance of stresses and nutrient levels need to be selected in crops, both individually and in combination. Here we report the identification of SImX1 encoding a mIXTA-like mYB transcription factor in tomato that simultaneously modulates drought resistance and metabolic processes through regulating key structural and regulatory genes of the corre- sponding pathways. Over-expression of SImX1 results in substantially increased drought tolerance and improved fruit quality, while knocking down SImX1 resulted in the opposite phenotypes. Our study indicates an effective way with multiplebeneficial traits by genetic engineering of a single regulatory gene and can be a novel approach to breeding crops.

关键词： Tomato Trichome SlmXI . Abioticstress Nutrient level

Theoretical study of reactive melt infiltration to fabricate Co-Si/C composites

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Chinese Physics B 2021年第11期30卷 434-439页

作者： Saqib Shahzad khurram Iqbal Zaheer Uddin Department of Physics University of KarachiKarachiSindh 75270Pakistan College of Computer Science and Information Systems Institute of Business Management(IoBM)KarachiSindh 75190Pakistan

Cobalt-silicon based carbon composites(Co–Si/C)have established a noteworthy consideration in recent years as a replacement for conventional materials in the automotive and aerospace *** achieve the composite,a reactive melt infiltration process(RmI)is used,in which a melt impregnates a porous preform by capillary *** method promises a high-volume fraction of reinforcement and can be steered in such a way to get the good“near-net”shaped components.A mathematical model is developed using reaction-formed Co–Si alloy/C composite as a prototype system for this *** wetting behavior and contact angle are discussed;surface tension and viscosity are calculated by Wang’s and Egry’s equations,*** radii of 5μm and 10μm are set as a reference on highly oriented pyrolytic *** graphs are plotted using the model,to study some aspects of the infiltration *** highlights the possible connections among the various *** this attempt,the Co–Si(62.5 at.%silicon)alloy’s maximum infiltration at 5μm and 10μm radii are found as 0.05668 m at 125 s and 0.22674 m at 250 s,respectively.

关键词： cobalt-silicon/carbon composites Co-Si alloy reactive melt infiltration(RmI) carbon preforms

H^+,N^+和Ar^+离子束辐射诱导碳纳米结构的变化(英文)

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新型炭材料 2013年第2期28卷 81-87页

作者： A Ishaq Shahid Iqbal Naveed Ali A A khurram A U Akrajas C F Dee Shahzad Naseem H m Rafique Yan Long National Center for Physics Quaid-i-Azam UniversityIslamabad 44000Pakistan Center of Excellence in Solid State Physics University of the PunjabLahore 54590Pakistan Institute of microengineering and Nanoelectronics Universiti Kebangsaan MalaysiaMalaysia School of Physical Sciences Department of PhysicsUniversity of the PunjabQuid-i-Azam Campus Lahore 54590Pakistan Shanghai Institute of Applied Physics Chinese Academy of Sciences

在室温和高温下,以不同辐射剂量的H+、N+和Ar+离子辐照多壁碳纳米管和无定形碳纳米线。利用透射电镜和拉曼光谱研究多壁碳纳米管和无定形碳纳米线的结构变化及损伤。以70keV N+离子束辐射多壁碳纳米管在室温下可形成无定形碳纳米线。10... 详细信息

在室温和高温下,以不同辐射剂量的H+、N+和Ar+离子辐照多壁碳纳米管和无定形碳纳米线。利用透射电镜和拉曼光谱研究多壁碳纳米管和无定形碳纳米线的结构变化及损伤。以70keV N+离子束辐射多壁碳纳米管在室温下可形成无定形碳纳米线。1000K下70keV的H+离子束照射导致无定形碳纳米线向金刚石结构转变。离子辐照多壁碳纳米管的有序程度足够高,70keV的N+和Ar+离子能够引起碳从多壁碳纳米管的剥落。离子辐射能够为缺陷的转化提供必需的动力学驱动力。

关键词：多壁碳纳米管离子束辐射相转变无定形碳纳米线洋葱状碳

Success Rate of Dental Implants Placed in the Atrophic Posterior maxilla with Intentional Sinus Floor Perforation in Lieu of Indirect Sinus Augmentation: A Retrospective Report of 26 Consecutive Patients and Literature Review

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Open Journal of Stomatology 2017年第2期7卷 113-120页

作者： khurram m.Shahzad Andrew Q.madson Evan m.Shipp Andrew W.Ellis Oral and maxillofacial Surgeon US Air Force Residency ProgramDavid Grant Medical CenterTravis Air Force BaseFairfieldCAUSA Oral and maxillofacial Surgeon US Air Force HospitalLakenheathUK Oral and maxillofacial Surgery Residency Program San Antonio Military Medical Center(SAMMC)San AntonioTXUSA US Air Force Hospital LakenheathUK

Purpose: To assess surgical success rate of placing dental implants in the atrophic posterior maxilla engaging the maxillary sinus floor in patients with inadequate posterior maxillary alveolar bone height (PmABH). methods: 26 patients with PmABH of 7 - 10 mm had 39 implants placed between July 2012 and June 2014. These implants were placed protruding apically 1 - 3 mm into the maxillary sinus engaging the sinus floor. At stage one, implants and cover screws were placed, followed by stage two, 5 - 6 months later. The implants were considered osseo-integrated in the absence of symptoms, mobility and inflammation. Periapical radiographs were taken to rule out peri-implant radiolucency. Restorative treatment was completed 2 months thereafter. Patients were scheduled to have a dental exam (6 - 12 months after delivery of prosthesis) and the implants were evaluated clinically and radiographically. A retrospective review was conducted to assess the surgical success rate of this treatment modality. Clinic charts, radiographs and digital implant log were reviewed for all patients with PmABH of 7 - 10 mm who received dental implants in the posterior maxilla to determine the success rate of this treatment modality. Results: 26 patients who had 39 implants placed were included in the study. All implants (100%) were osseo-integrated at the time of uncovering (stage 2). None of the implants (0%) had mobility or inflammation around them. Stage 2 was successfully performed on all 39 implants (100%). All implants (100%) in these patients had been restored, and were in good condition without mobility or inflammation, and had been functioning well 6 - 12 months after restoration. Conclusion: This study suggests that a high success rate can be attained placing dental implants in the posterior maxilla while perforating and engaging the cortical maxillary sinus floor. A future prospective study that compares this technique with the internal sinus lift would likely help elucidate this su

关键词： Posterior maxilla Implants Sinus Perforation

Development of Prototype Interfaces for the Control of a micro-Aerial Vehicle

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Development of Prototype Interfaces for the Control of a Mic...

Slow Phase Transition-Induced Scan Rate Dependence of Spin Crossover in a Two-Dimensional Supramolecular Fe(III)Complex

第十七届国际工效学大会暨中国人类工效学会成立20周年庆祝大会

作者： Jocelyn Keillor Franklin Wong Thomas m.Haylock khurram Somjee Defence Research & Development Canada University of Waterloo

Three prototype interfaces were developed to investigate the effectiveness of the interfaces for the control of a micro-aerial vehicle(mAV).The first prototype on a tablet PC was used to conduct a focus group study to validate a statement of requirements for a mAV *** on the study’s findings,another prototype interface on a Nokia Internet Tablet with a touch screen was also *** second prototype interface was implemented on a SONY PlayStation Portable with tactile *** interfaces on the two handheld devices will be used for a planned empirical investigation of operator *** results will help guide operator interface design for systems with similar requirements.

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CCS Chemistry 2023年第2期5卷 412-422页

作者： Zhao-Yang Li Ying-Ying Wu Yao Li Jin-Hua Wang Arshia Sulaiman mohammad khurram Javed Ya-Chao Zhang Wei Li Xian-He Bu School of materials Science and Engineering Nankai UniversityTianjin 300350 Guizhou Provincial Key Laboratory of Computational Nano-material Science Guizhou Education UniversityGuiyang 550018 College of Chemistry Nankai UniversityTianjin 300071

Spin crossover(SCO)is commonly accompanied by a synchronous phase transition.A few phase transitioncoupled SCO compounds have been reported,yet the synergy between SCO and phase transition on different time scales has not been ***,we report an[Fe(H-5-Cl-thsa-Et)(5-Cl-thsa-Et)]·H2O(1·H2O;H2-5-Cl-thsa-Et=5-chloro-salicylaldehyde ethylthiosemicarbazone)Fe(III)complex that displays a two-dimensional supramolecular structure and SCO behavior above room *** dehydrated form1 exhibits a two-step spin transition with aplateau in the temperature-dependent magnetization(m−T)curve at room temperature and a 51 K thermal hysteresis loop(Tc↑↓=299/248 K)at a rate of 5 K/*** improved SCOperformance in 1 could be attributed to the stronger intralayer but weaker interlayer interactions,which is supported by single-crystal structural analysis and density functional theory ***,complex 1 displays an unusual scan rate-dependent SCO behavior at rates of 0.5−30 K/min,in whichm−T curveplateaus appear at lower scan rates(min)but vanish at faster scan rates(≥10 K/min).Scan rate-dependent differential scanning calorimetry,powder X-ray diffractometry,timedependent magnetic moment decays,and infrared spectroscopy consistently reveal that the slow structural relaxation is coupled with a slowcrystallographic phase transition,which is the mechanism for the unusual scan rate-dependent SCO.

关键词： supramolecular two-dimensional structures scan rate dependence spin crossover slow phase transition