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Journal of Rare Earths 2019年第12期37卷 1279-1287页

作者： Manisha Dhiman sonal singhal Department of Chemistry Panjab University

Different rare earth substituted perovskites LaRExFe1-xO3(where RE=Eu3+,Gd3+,Dy3+,Nd3+and x=0.02,0.04,0.06,0.08,0.1)with orthorhombic structure and narrow band gaps were successfully fabricated via sol-gel autocombustion *** the substituted perovskites are found to exhibit excellent photocatalytic activity towards the oxidative degradation of dye *** excellent increase in the rate constant values of pure perovskite(LaFeO3)photocatalytic reactions is observed with the substitution of rare earth metal *** results are obtained for LaNd0.1Fe0.9O3 which exhibits around 7 times increase in the rate constant values for degradation reaction of SO(1.76×10-1 min-1)and RBY(1.69×10-1 min-1)dyes.

关键词： Rare earth substitution Perovskites Sol-gel autocombustion Structural properties Photocatalysis

Traversing the advantageous role of samarium doped spinel nanoferrites for photocatalytic removal of organic pollutants

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Journal of Rare Earths 2021年第7期39卷 781-789,I0002页

作者： Sneha Singh Paramdeep Kaur Vinod Kumar K.B.Tikoo sonal singhal Department of Chemistry Panjab UniversityChandigarh160014India HRTEM Facility Lab NIPERSA.S.NagarMohaliPunjab160062India

The present work reportes the pertinence of samarium(Sm) doped spinel nanoferrites as magnetically recoverable photocatalyst for the removal of organic pollutants from ***,a series of Sm substituted spinel nano ferrites,MSm_(x)Fe_(2-x)O_(4)(M=Ni,Co;x=0,0.02,0.06,0.1) we re synthesized via sol-gel *** effect of Sm doping on the structural,morphological,optical and magnetic properties of pristine nanoferrites was investigated ***,the fabricated samples were explored as photocatalysts for the oxidative degradation of antibiotics(ofloxacin and norfloxacin) and dyes(methyl orange and safranin O).The Sm doped nanoferrites exhibit astonishing catalytic efficacy that can be attributed to higher surface area,octahedral site preference of Sm ions and reduced band *** synthesized nanoferrites display excellent recyclability which enables them to be utilized as potential photocatalysts for wastewater treatment.

关键词： Samarium doped nanoferrites Sol-gel Pharmaceutical degradation Recyclability Rare earths

Cation Distribution in Lithium Ferrite(LiFe_(5)O_(8))Prepared via Aerosol Route

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Journal of Electromagnetic Analysis and Applications 2010年第1期2卷 51-55页

作者： sonal singhal Kailash Chandra Department of Chemistry Panjab UniversityChandigarhIndia Institute Instrumentation Centre Indian Institute of TechnologyRoorkeeIndia

Nano size lithium ferrite was prepared through aerosol route and characterized using TEM, XRD, magnetic measurements and M?ssbauer spectroscopy. The particle size of as obtained samples were found to be ~10 nm through TEM, that increases upto ~80 nm on annealing at 1200 oC. The unit cell parameter ‘a’ calculated using XRD, confirms the formation of ?-LiFe5O8. Room temperature M?ssbauer spectra of as obtained sample of all the ferrites exhibited broad doublet suggesting super paramagnetic nature. This doublet further resolved into two doublets and assigned to the surface region atoms and internal region atoms of the particles. The annealed samples (1200 oC) show broad sextets, which were fitted with two sextets indicating different local environment of both tetrahedrally and octahedrally coordinated Fe-cation. Cation distribution obtained from the X-ray, magnetic and M?ssbauer data confirms that the three fifth of the iron atom goes in to the octahedral site.

关键词： Nano Particles Saturation Magnetization Coercivity X-Ray Diffraction Mossbauer Spectra

Effect of Zn Substitution on the Magnetic Properties of Cobalt Ferrite Nano Particles Prepared Via Sol-Gel Route

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Journal of Electromagnetic Analysis and Applications 2010年第6期2卷 376-381页

作者： sonal singhal Tsering Namgyal S. Bansal Kailash Chandra 不详

Zinc substituted cobalt ferrite nanoparticles (CoxZn1-xFe2O4, with x = 0.0, 0.2, 0.4, 0.8 and 1.0) were prepared via sol-gel route and the effect of zinc concentration on saturation magnetization and lattice parameter were investigated. The particle sizes of the as obtained samples were found to be ~10 nm which increases upto ~92 nm on annealing at 1000oC. The frequency bands near 564-588 cm-1 and 425-442 cm-1 are assigned to the tetrahedral and octahedral clusters which confirm the presence of M-O stretching band in ferrites. The unit cell parameter ‘a’ increases linearly with increasing concentration of zinc due to larger ionic radii of Zn2+ ion . It was found that this substitution allows tunable changes in the magnetic properties of cobalt ferrite. Interestingly, saturation magnetization first increases upto x = 0.4 and then decreases for higher Zn substitution, thus tunable changes in magnetic properties of cobalt ferrite are possible. Source of such behaviour could be the variation of exchange interaction between the tetrahedral and the octahedral sites.

关键词： Nano Particles Saturation Magnetization Coercivity X-Ray Diffraction

Structural and Magnetic Properties of BaCoxFe12xO19(x = 0.2, 0.4, 0.6, &1.0) Nanoferrites Synthesized via Citrate Sol-Gel Method

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World Journal of Condensed Matter Physics 2011年第3期1卷 101-104页

作者： sonal singhal Kirandish Kaur Sheenu Jauhar Santosh Bhukal S Bansal Department of Chemistry Panjab University Chandigarh – 160 014 INDIA

Cobalt substituted barium ferrites, BaCoxFe12-xO19 (x = 0.2, 0.4, 0.6 & 1.0) have been synthesized via citrate sol-gel method. All the samples have been annealed at 1000℃ and characterized using Fourier Transform Infra Red spectroscopy, X-Ray Diffractography and Vibrating Sample Magnetometry. The FT-IR spectra of the samples exhibit two frequency bands in the range of 580 cm-1 and 460 cm-1, corresponding to the formation of metal oxides. The XRD studies reveal a crystallite size of ~55 nm. The saturation magnetization decreases from 96.3 emu/g to 47.8 emu/g with increasing concentration of cobalt due to the lower magnetic moment of Co2+ (3 μB) as compared to Fe3+ (5 μB). The coercivity values also show a decreasing behaviour from 3800 Oe to 1750 Oe with increasing cobalt concentration due to reduced magnetocrystalline anisotropy.

关键词： Barium Ferrite Magnetic Moment Coercivity XRD

Explainable Artificial Intelligence(XAI)Model for Cancer Image Classification

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Computer Modeling in Engineering & Sciences 2024年第10期141卷 401-441页

作者： Amit singhal Krishna Kant Agrawal Angeles Quezada Adrian Rodriguez Aguiñaga Samantha Jiménez Satya Prakash Yadav Department of Computer Science&Engineering Raj Kumar Goel Institute of TechnologyGhaziabad201017India Department of School of Computing Science and Engineering Galgotias UniversityGreater Noida203201India Tecnológico Nacional de México Campus Tijuana Baja California22414México Universidad Autónoma de Baja California TijuanaBaja California22414México Department of Computer Science and Engineering G.LBajaj Institute of Technology and Management(GLBITM)Affiliated to Dr.A.P.J.Abdul Kalam Technical UniversityLucknow201306India School of Computer Science Engineering and Technology(SCSET) Bennett UniversityGreater Noida201310India

The use of Explainable Artificial Intelligence(XAI)models becomes increasingly important for making decisions in smart healthcare *** is to make sure that decisions are based on trustworthy algorithms and that healthcare workers understand the decisions made by these *** models can potentially enhance interpretability and explainability in decision-making processes that rely on artificial ***,the intricate nature of the healthcare field necessitates the utilization of sophisticated models to classify cancer *** research presents an advanced investigation of XAI models to classify cancer *** describes the different levels of explainability and interpretability associated with XAI models and the challenges faced in deploying them in healthcare *** addition,this study proposes a novel framework for cancer image classification that incorporates XAI models with deep learning and advanced medical imaging *** proposed model integrates several techniques,including end-to-end explainable evaluation,rule-based explanation,and useradaptive *** proposed XAI reaches 97.72%accuracy,90.72%precision,93.72%recall,96.72%F1-score,9.55%FDR,9.66%FOR,and 91.18%*** will discuss the potential applications of the proposed XAI models in the smart healthcare *** will help ensure trust and accountability in AI-based decisions,which is essential for achieving a safe and reliable smart healthcare environment.

关键词： Explainable artificial intelligence artificial intelligence XAI healthcare cancer image classification

Comprehensive Analysis of Gender Classification Accuracy across Varied Geographic Regions through the Application of Deep Learning Algorithms to Speech Signals

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Computer Systems Science & Engineering 2024年第3期48卷 609-625页

作者： Abhishek singhal Devendra Kumar Sharma Department of Electronics and Communication Engineering Faculty of Engineering and TechnologySRM Institute of Science and TechnologyDelhi–NCR CampusGhaziabad201204India

This article presents an exhaustive comparative investigation into the accuracy of gender identification across diverse geographical regions,employing a deep learning classification algorithm for speech signal *** this study,speech samples are categorized for both training and testing purposes based on their geographical *** 1 comprises speech samples from speakers outside of India,whereas Category 2 comprises live-recorded speech samples from Indian *** speech samples are likewise classified into four distinct sets,taking into consideration both geographical origin and the language spoken by the ***,the results indicate a noticeable difference in gender identification accuracy among speakers from different geographical *** speakers,utilizing 52 Hindi and 26 English phonemes in their speech,demonstrate a notably higher gender identification accuracy of 85.75%compared to those speakers who predominantly use 26 English phonemes in their conversations when the system is trained using speech samples from Indian *** gender identification accuracy of the proposed model reaches 83.20%when the system is trained using speech samples from speakers outside of *** the analysis of speech signals,Mel Frequency Cepstral Coefficients(MFCCs)serve as relevant features for the speech *** deep learning classification algorithm utilized in this research is based on a Bidirectional Long Short-Term Memory(BiLSTM)architecture within a Recurrent Neural Network(RNN)model.

关键词： Deep learning recurrent neural network voice signal mel frequency cepstral coefficients geographical area gender

Incidence of exclusive extrapelvic skeletal metastasis in prostate carcinoma on bone scintigraphy

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World Journal of Radiology 2024年第7期16卷 265-273页

作者： Parneet Singh Kanhaiyalal Agrawal Ashique Rahman Tejasvini singhal Girish Kumar Parida Gopinath Gnanasegaran Department of Nuclear Medicine All India Institute of Medical SciencesBhubaneshwar 751019OdishaIndia Department of Nuclear Medicine Royal Free HospitalLondon NW32QGUnited Kingdom

BACKGROUND Bone is one of the common sites of metastasis from prostate *** scintigraphy(BS)is one of the most sensitive imaging modalities currently used for bone metastatic *** metastasis in prostate carcinoma commonly involves pelvic bones but rarely involves extrapelvic-extraspinal *** To retrospectively analyze the BS data to determine the pattern of skeletal metastases in the prostate *** This retrospective observational study involves patients with biopsy-proven prostate carcinoma referred for BS for staging *** with abnormal BS were evaluated for the pattern of skeletal involvement and data were pre-sented in descriptive format in the form of *** A total of 150 patients with biopsy-proven prostate cancer who were referred for staging were included in the *** of 150 patients(8.67%)had no abnormal uptake on planar images,ruling out metastatic ***-four patients(16%)had heterogeneous uptake in the spine with distribution charac-teristic of degenerative disease and no scan pattern of metastatic *** patients(20%)had multifocal uptake involving both pelvic and extra pelvic bones on planar images typical for skeletal metastasis and were considered ***-three out of 150 patients(55.3%)had increased tracer uptake,which was indeterminate,thus,single photon emission computed tomography-computed tomography(SPECT-CT)was acquired,which showed 51 with metastatic disease,31 benign lesions,and one indeterminate *** of 150 patients had exclusive pelvic bone uptake,which was found to be metastatic in 4/7 patients in *** six out of 150 patients showed exclusive extrapelvic tracer uptake,of which only 3 had vertebral metastatic *** of the patients with increased uptake exclusively in the extrapelvic-extraspinal location was *** The incidence of exclusive extrapelvic skeletal metastatic disease in prostate carcinom

关键词： Pelvic Prostate cancer Bone scan Single photon emission computed tomography-computed tomography Skeletal metastasis

以掺氢天然气为燃料直接内重整固体氧化物电池堆的稳定性

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电化学（中英文） 2024年第1期30卷 46-54页

作者：汤亚飞武安祺韩贝贝刘华包善军林王林陈铭官万兵 Subhash C.singhal 中国科学院宁波材料技术与工程研究所浙江宁波315201 浙江启明电力集团有限公司浙江舟山316099 浙江大学舟山海洋研究中心浙江舟山316021 丹麦技术大学能源转换与储存系川麦哥本哈根

本文研究了掺氢天然气直接内重整平管型固体氧化物电池短堆的长期稳定性和衰减机理。通过约3000小时的实测实验,结果显示,电堆的总体衰减率为2.3%·kh^(-1),电堆中三个金属连接板的面积比电阻分别增加了0.276Ω·cm^(2)、0.254Ω·cm^(2... 详细信息

本文研究了掺氢天然气直接内重整平管型固体氧化物电池短堆的长期稳定性和衰减机理。通过约3000小时的实测实验,结果显示,电堆的总体衰减率为2.3%·kh^(-1),电堆中三个金属连接板的面积比电阻分别增加了0.276Ω·cm^(2)、0.254Ω·cm^(2)和0.249Ω·cm^(2),但电堆中两个电池的电压反而分别增加了3.38 m V·kh^(-1)和3.78 m V·kh^(-1)。电堆衰减主要由金属连接件表层氧化及其与阴极集流层材料反应生成Sr CrO_(4)物质,两者共同作用增大了电池与金属连接体间的界面电阻所致。结果表明,以掺氢天然气为燃料直接内重整平管型固体氧化物燃料电池电堆具有良好的稳定性。本文工作为掺氢天然气在固体氧化物燃料电池堆中的直接内重整应用提供了理论参考与实验依据。

关键词：掺氢天然气内重整稳定性固体氧化物电堆

以掺氢天然气为燃料直接内重整固体氧化物电池堆的稳定性（英文）

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电化学(中英文) 2024年第1期 49-57页

作者：汤亚飞武安祺韩贝贝刘华包善军林王林陈铭官万兵 Subhash C.singhal 中国科学院宁波材料技术与工程研究所浙江启明电力集团有限公司浙江大学舟山海洋研究中心丹麦技术大学能源转换与储存系

本文研究了掺氢天然气直接内重整平管型固体氧化物电池短堆的长期稳定性和衰减机理。通过约3000小时的实测实验，结果显示，电堆的总体衰减率为2.3%kh–1，电堆中三个金属连接板的面积比电阻分别增加了0.276Ω·cm2、0.254Ω·cm2和0.24... 详细信息

本文研究了掺氢天然气直接内重整平管型固体氧化物电池短堆的长期稳定性和衰减机理。通过约3000小时的实测实验，结果显示，电堆的总体衰减率为2.3%kh–1，电堆中三个金属连接板的面积比电阻分别增加了0.276Ω·cm2、0.254Ω·cm2和0.249Ω·cm2，但电堆中两个电池的电压反而分别增加了3.38 m V·kh–1和3.78 m V·kh–1。电堆衰减主要由金属连接件表层氧化及其与阴极集流层材料反应生成Sr Cr O4物质，两者共同作用增大了电池与金属连接体间的界面电阻所致。结果表明，以掺氢天然气为燃料直接内重整平管型固体氧化物燃料电池电堆具有良好的稳定性。本文工作为掺氢天然气在固体氧化物燃料电池堆中的直接内重整应用提供了理论参考与实验依据。

关键词：掺氢天然气内重整稳定性固体氧化物电堆