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Geochemical Characterization of Organic Rich Black Rocks of the Niutitang Formation to Reconstruct the Paleoenvironmental Settings during Early Cambrian Period from Xiangxi Area,Western Hunan,China

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Journal of Earth Science 2023年第6期34卷 1827-1850页

作者： Rizwan Sarwar Awan Chenglin Liu Ashar Khan Khawaja Hasnain Iltaf Qibiao Zang Yuping Wu sajjad Ali Muhammad Amar Gul College of Geosciences China University of PetroleumBeijing 102249China State Key Laboratory of Petroleum Resource and Prospecting China University of PetroleumBeijing 102249China Water and Power Development Authority Lahore 54000Pakistan School of Earth and Space Sciences University of Science and TechnologyHefei 230026China

The Niutitang Formation in the South China Block might be a source of hydrocarbon as it contains an enormous quantity of organic *** rock of the Early Cambrian Niutitang Formation is widely distributed in the Yangtze region,but detailed geochemical understanding of it is still *** research discusses the detailed geochemical characteristics of the Niutitang Formation to reconstruct the paleoenvironmental conditions,employing total organic carbon(TOC)content,major,trace,and rare earth element *** this purpose,black rock specimens of the Niutitang Formation from two outcrop sections were utilized for geochemical characterization,and the results compared with another eight sections from the South China *** average total organic carbon in these sediments is significantly higher(5.80 wt.%).In the platform region,lower quantities of TOC indicate a poor potential to produce *** the same time,significantly higher TOC is observed in the deep shelf and slope sediments,indicating a significant potential to produce *** average Ce,Eu and Y anomalies from both Longbizui and Sancha sections studied are 0.74,0.86,1.77,1.07,and 1.19,1.30,*** chemical index of alteration(CAI)throughout the Yangtze block is higher(averaging 71.32)than that of Post Archean Australian Shale(PAAS 69),indicating a moderately weathered source of the Niutitang Formation relative to *** the sediments are moderately weathered,this suggests these rocks might have been derived from felsic rocks,mainly *** normalization of REEs in the black rocks reveals a reduction of light REEs with increase in heavy REEs ***,a positive Eu anomaly,negative Ce anomaly,and a moderate Y/Ho(34.61)are clues to a hybrid depositional mechanism associated with hydrothermal action and terrigenous *** anomalies are also evidence of upwelling in the paleo-ocean and mixing of organic matter,which created anoxic bottom water

关键词： anomaly paleo-ocean paleoenvironment chemical index alteration weathering meta-somatism sediments

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Anomaly Based Camera Prioritization in Large Scale Surveillance Networks

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Computers, Materials & Continua 2022年第2期70卷 2171-2190页

作者： Altaf Hussain Khan Muhammad Hayat Ullah Amin Ullah Ali Shariq Imran Mi Young Lee Seungmin Rho Muhammad sajjad Department of Software Sejong University143-747SeoulKorea Digital Image Processing Lab Islamia College Peshawar25000Pakistan Color Lab Department of Computer ScienceNorwegian University of Science and Technology(NTNU)2815GjovikNorway CORIS Institute Oregon State University97331OregonUSA

Digital surveillance systems are ubiquitous and continuously generate massive amounts of data,and manual monitoring is required in order to recognise human activities in public *** surveillance systems that can automatically identify normal and abnormal activities are highly desirable,as these would allow for efficient monitoring by selecting only those camera feeds in which abnormal activities are *** paper proposes an energy-efficient camera prioritisation framework that intelligently adjusts the priority of cameras in a vast surveillance network using feedback from the activity recognition *** proposed system addresses the limitations of existing manual monitoring surveillance systems using a three-step *** the first step,the salient frames are selected from the online video stream using a frame differencing method.A lightweight 3D convolutional neural network(3DCNN)architecture is applied to extract spatio-temporal features from the salient frames in the second ***,the probabilities predicted by the 3DCNN network and the metadata of the cameras are processed using a linear threshold gate sigmoid mechanism to control the priority of the *** proposed system performs well compared to state-of-theart violent activity recognition methods in terms of efficient camera prioritisation in large-scale surveillance *** experiments and an evaluation of activity recognition and camera prioritisation showed that our approach achieved an accuracy of 98%with an F1-score of 0.97 on the Hockey Fight dataset,and an accuracy of 99%with an F1-score of 0.98 on the Violent Crowd dataset.

关键词： Camera prioritisation surveillance networks convolutional neural network computer vision deep learning resource-constrained device violent activity recognition

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Reservoir Quality Assessment of the Upper Permian Chhidru Formation, Salt and Surghar Ranges, Pakistan

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Acta Geologica Sinica(English Edition) 2021年第6期95卷 2120-2137页

作者： Muhammad ZAHIR Muhammad AWAIS Mukhtiar GHANI Mohibullah MOHIBULLAH Osman SALAD HERSI Irfan U.JAN sajjad ahmad Hamid IQBAL Centre of Excellence in Mineralogy University of BalochistanQuetta 87300Pakistan Department of Geology University of SwabiAnbarKhyber Pakhtunkhwa 23561Pakistan Geological Survey of Pakistan HQQuetta 87300Pakistan Department of Geology University of BalochistanQuetta 87300Pakistan University of Regina Geology 3737 Wascana Parkway ReginaSaskatchewan S4S0A2Canada National Centre of Excellence in Geology University of PeshawarPeshawar 25000Pakistan Department of Geology University of PeshawarPeshawar 25000Pakistan Oil and Gas Development Company Islamabad 44800Pakistan

The Late Permian succession of the Upper Indus Basin in northeastern Pakistan is represented by the carbonatedominated Zaluch Group, which consists of the Amb, Wargal and Chhidru formations, which accumulated on the southwestern shelf of the Paleo-Tethys Ocean, north of the hydrocarbon-producing Permian strata of the Arabian Peninsula. The reservoir properties of the mixed clastic-carbonate Chhidru Formation(CFm) are evaluated based on petrography, using scanning electron microscopy(SEM), energy dispersive x-ray spectroscopy(EDX) and x-ray diffraction(XRD) techniques. The diagenetic features are recognized, ranging from marine(isopachous fibrous calcite, micrite), through meteoric(blocky calcite-I, neomorphism and dissolution) to burial(poikilotopic cement, blocky calcite-II-III, fractures, fracture-filling, and stylolites). Major porosity types include fracture and moldic, while inter-and intra-particle porosities also exist. Observed visual porosity ranges from 1.5%–7.14% with an average of 5.15%. The sandstone facies(CMF-4) has the highest average porosity of 10.7%, whereas the siliciclastic grainstone microfacies(CMF-3) shows an average porosity of 5.3%. The siliciclastic mudstone microfacies(CMF-1) and siliciclastic wacke-packestone microfacies(CMF-2) show the lowest porosities of 4.8% and 5.0%, respectively. Diagenetic processes like cementation, neomorphism, stylolitization and compaction have reduced the primary porosities;however, processes of dissolution and fracturing have produced secondary porosity. On average, the CFm in the Nammal Gorge, Salt Range shows promise and at Gula Khel Gorge, Trans-Indus, the lowest porosity.

关键词： sedimentary petrography diagenesis hydrocarbon reservoir Changhsingian Chhidru Formation Salt Range Surghar Range Pakistan

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Exploring the experimental study and density functional theory calculations of symmetric and asymmetric chalcogen atoms interacted molybdenum dichalcogenides for lithium-ion batteries

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Journal of Materials Science & Technology 2023年第31期162卷 44-56页

作者： Dhanasekaran Vikraman sajjad Hussain Zeesham Abbas K.Karuppasamy Woo-Seok Kang P.Santhoshkumar A.Kathalingam Jongwan Jung Hyun-Seok Kim Division of Electronics and Electrical Engineering Dongguk University-SeoulSeoul 04620Republic of Korea Department of Nanotechnology and Advanced Materials Engineering Sejong UniversitySeoul 05006Republic of Korea Hybrid Materials Center(HMC) Sejong UniversitySeoul 05006Republic of Korea Millimeter-wave Innovation Technology(MINT)Research Center Dongguk University-SeoulSeoul 04620Republic of Korea

Two-dimensional asymmetric chalcogen atoms attached to Janus nanoparticles have fascinated research attention owing to their distinctive properties and characteristics for various *** paper proposed a facile synthesis to produce efficient molybdenum-based symmetric and asymmetric chalcogens bounded by X Mo X and TeMo X ***,the fabricated X Mo X and TeMo X nanostruc-tures were employed as anodes for lithiumion batteries(LIBs).Assembled LIBs using TeMoS and TeMoSe Janus anodes achieved 2610 and 2073 mAh g^(-1)reversible capacity at 0.1 A g^(-1),respectively for the halfcell configuration,which is outstanding performance compared with previous *** rate capability performances at 0.1-20 A g^(-1)and exceptional cycling solidity confirmed high charge and discharge capacities for TeMo X Janus lithium-ion battery *** addition,the full cell device with TeMoS//LiCoO_(2)configuration explored the discharge capacity of 1605 mAh g^(-1)at 0.1 A g^(-1)which suggests their excellent electrochemical *** density functional theory approximations established the significance of assembled symmetric and asymmetric chalcogen atoms interacted with X Mo X and TeMo X anode materials for ***,the present investigation supports a new approach to creating two-dimensional materials based on asymmetric chalcogen atoms with core metal to effectively increase desirable energy storage characteristics.

关键词： TeMoS TeMoSe Janus Li-ion battery

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Synthesis and Characterization of Antimony（III） Complexes of Thioamides, and Crystal Structure of {[Sb（Imt）2Cl2]2（u2-lmt）}Cl2 （Imt=Imidazolidine-2-thione）

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Chinese Journal of Chemistry 2011年第2期29卷 254-258页

作者： Ajaz Humayun Hussain sajjad Altaf Muhammad Stoeckli-Evans Helen Isab Anvarhusein Mahmood Rashid Altaf shahnila ahmad Saeed Department of Chemistry University of Engineering and Technology Lahore 54890 Pakistan Institute of Physics University of Neuchdtel Rue Emile-Argand 11 CH-2009 Neuchatel Switzerland Department of Chemistry King Fahd University of Petroleum and Minerals Dhahran 31261 Saudi Arabia Division of Science and Technology University of Education Township Lahore Pakistan

Antimony（III） complexes of thioamides [thioamides=thiourea （Tu）, N,N＇dimethylthiourea （Dmtu）, tetramethylthiourea （Tmtu）, imidazolidine-2-thione （Imt） and diazinane-2-thione （Diaz）] with the general formulae, Sb（thione）nCl3 （n= 1, 2, 2.5, 3） were prepared and characterized by elemental analysis, IR and NMR （1H, 13C） spectroscopic methods. The spectral data of the complexes are consistent with the coordination of the thiones to antimony（III）. The crystal structure of one of them, {[Sb（Imt）2Cl2]2（u2-Imt）}Cl2 （1）, was determined by X-ray crystallography, which shows that the complex is dinuclear consisting of two [Sb（Imt）2Cl2] units bridged by an Imt molecule. In 1, the antimony atom is bonded to two chlorine atoms, two sulfur atoms of coordinated Imt molecules and one sulfur atom of a bridging Imt molecule. The antimony environment can be considered to be distorted octahedral with one Cl- ion weakly bound to antimony.

关键词： antimony(III) complex thioamide crystal structure spectroscopy

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Carbonized nano/microparticles for enhanced mechanical properties and electromagnetic interference shielding of cementitious materials

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Frontiers of Structural and Civil Engineering 2016年第2期10卷 209-213页

作者： Rao Arsalan KHUSHNOOD sajjad ahmad Luciana RESTUCCIA Consuelo SPOTO Pravin JAGDALE Jean-Marc TULLIANI Giuseppe Andrea FERRO Department of StructuraL Geotechnical and Building Engineering(DISEG) Politecnico di Torino10129 TorinoItaly Nust Institute of Civil Engineering(NICE) National University of Sciences and Technology(NUST)44000 IslamabadPakistan Mirpur University of Science and Technology(MUST) 10250 MirpurAzad KashmirPakistan Department of Applied Science and Technology(DISAT) Politecnico di Torino10129 TorinoItaly

In the present work, carbon nano/microparticles obtained by controlled pyrolysis of peanut （PS） and hazelnut （HS） shells are presented. These materials were characterized by Raman spectroscopy and field emissionscanning electron microscopy （FE-SEM）. When added to cement paste, up to 1 wt%, these materials led to an increase of the cement matrix flexural strength and of toughness. Moreover, with respect to plain cement, the total increase in electromagnetic radiation shielding effect when adding 0.5 wt% of PS or HS in cement composites is much higher in comparison to the ones reported in the literature for CNTs used in the same content.

关键词： carbon nano/microparticles green cement toughness mechanism electromagnetic shielding effect

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Efficient Joint Key Authentication Model in E-Healthcare

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Computers, Materials & Continua 2022年第5期71卷 2739-2753页

作者： Muhammad sajjad Tauqeer Safdar Malik shahzada Khurram Akber Abid Gardezi Fawaz Alassery Habib Hamam Omar Cheikhrouhou Muhammad Shafiq Department of Computer Science Air University Multan CampusMultan60000Pakistan Faculty of Computing The Islamia University of BahawalpurBahawalpur 63100Pakistan Department of Computer Science COMSATS University IslamabadIslamabadPakistan Department of Computer Engineering College of Computers and Information TechnologyTaif UniversityTaifSaudi Arabia Faculty of Engineering Moncton UniversityNBE1A3E9Canada CES Laboratory National School of Engineers of SfaxUniversity of SfaxSfax3038Tunisia Department of Information and Communication Engineering Yeungnam UniversityGyeongsan38541Korea

Many patients have begun to use mobile applications to handle different health needs because they can better access high-speed Internet and *** devices and mobile applications are now increasingly used and integrated through the medical Internet of Things(mIoT).mIoT is an important part of the digital transformation of healthcare,because it can introduce new business models and allow efficiency improvements,cost control and improve patient *** the mIoT system,when migrating from traditional medical services to electronic medical services,patient protection and privacy are the priorities of each ***,it is recommended to use different user authentication and authorization methods to improve security and *** this paper,our prosed model involves a shared identity verification process with different situations in the e-health *** aim to reduce the strict and formal specification of the joint key authentication *** use the AVISPA tool to verify through the wellknown HLPSL specification language to develop user authentication and smart card use cases in a user-friendly *** model has economic and strategic advantages for healthcare organizations and healthcare *** medical staff can increase their knowledge and ability to analyze medical data more *** model can continuously track health indicators to automatically manage treatments and monitor health data in real ***,it can help customers prevent chronic diseases with the enhanced cognitive functions *** necessity for efficient identity verification in e-health care is even more crucial for cognitive mitigation because we increasingly rely on mIoT systems.

关键词： E-health systems joint key authentication mutual authentication

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Unravelling critical role of metal cation engineering in boosting hydrogen evolution reaction activity of molybdenum diselenide

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Rare Metals 2022年第6期41卷 1851-1858页

作者： Saman sajjad Chao Wang Cheng-Wei Deng Feng Ji Tariq Ali Babar Shezad Hao-Qing Ji Cheng-Lin Yan College of Energy Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceSoochow UniversitySuzhou 215006China Space Power Technology State Key Laboratory Shanghai Institute of Space Power-SourcesShanghai 200245China

Two-dimensional(2D)transition-metal selenides,espe-cially MoSe_(2),is considered to be an excellent alternative electrocatalyst for the hydrogen evolution reaction(HER).However,it still features high overpotential in HER due to the low density of active sites,which limits its practical ***,the hydrogen evolution reaction activity of MoSe_(2)is enhanced by the incorporation of metal-cation,tungsten,which succeeds in taking the place of Mo in the lattice of MoSe_(2),inducing the spacing expansion and bringing new flexural edges to serve as active *** addition,the incorporated metal also facil-itates electron transport from Mo active center toward W and Se atoms with auspicious hydrogen adsorption prop-erties.

关键词： molybdenum critical spacing

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3D bioprinted organ-on-chips

聚集体(英文)

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聚集体(英文) 2023年第1期4卷 1-26页

作者： sajjad Rahmani Dabbagh Misagh Rezapour Sarabi Mehmet Tugrul Birtek Nur Mustafaoglu Yu Shrike Zhang Savas Tasoglu Department of Mechanical Engineering Koc UniversitySariyerIstanbulTurkey Koc University Arçelik Research Center for Creative Industries(KUAR) Koc UniversitySariyerIstanbulTurkey Koc University Is Bank Artificial Intelligence Lab(KUIS AILab) Koc UniversitySariyerIstanbulTurkey Faculty of Engineering and Natural Sciences Sabanci UniversityTuzlaIstanbulTurkey Division of Engineering in Medicine Department of MedicineBrigham and Women’s HospitalHarvard Medical SchoolCambridgeMassachusettsUSA Physical Intelligence Department Max Planck Institute for Intelligent SystemsStuttgartGermany

Organ-on-a-chip(OOC)platforms recapitulate human in vivo-like conditions more realistically compared to many animal models and conventional two-dimensional cell *** setups benefit from continuous perfusion of cell cultures through microfluidic channels,which promotes cell viability and ***,microfluidic chips allow the integration of biosensors for real-time monitoring and analysis of cell interactions and responses to administered ***-dimensional(3D)bioprinting enables the fabrication of multicell OOC platforms with sophis-ticated 3D structures that more closely mimic human tissues.3D-bioprinted OOC platforms are promising tools for understanding the functions of organs,disruptive influences of diseases on organ functionality,and screening the efficacy as well as toxicity of drugs on ***,common 3D bioprinting techniques,advantages,and limitations of each method are ***,recent advances,applica-tions,and potentials of 3D-bioprinted OOC platforms for emulating various human organs are ***,current challenges and future perspectives of OOC plat-forms are discussed.

关键词： biomaterials bioprinting disease-on-a-chip microfluidics organ-on-a-chip

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Photoactive area modification in bulk heterojunction organic solar cells using optimization of electrochemically synthesized ZnO nanorods

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Chinese Physics B 2015年第11期24卷 422-427页

作者： Mehdi ahmadi sajjad Rashidi Dafeh Department of Physics Faculty of Science Vali-e-Asr University of Rafsanjan

In this work, ZnO nanorod arrays grown by an electrochemical deposition method are investigated. The crucial parameters of length, diameter, and density of the nanorods are optimized over the synthesize process and nanorods growth time. Crystalline structure, morphologies, and optical properties of ZnO nanorod arrays are studied by different techniques such as x-ray diffraction, scanning electron microscope, atomic force microscope, and UV-visible transmission spectra. The ZnO nanorod arrays are employed in an inverted bulk heterojunction organic solar cell of Poly （3-hexylthiophene）：[6- 6] Phenyl-（6） butyric acid methyl ester to introduce more surface contact between the electron transporter layer and the active layer. Our results show that the deposition time is a very important factor to achieve the aligned and uniform ZnO nanorods with suitable surface density which is required for effective infiltration of active area into the ZnO nanorod spacing and make a maximum interfacial surface contact for electron collection, as overgrowing causes nanorods to be too dense and thick and results in high resistance and lower visible light transmittance. By optimizing the thickness of the active layer on top of ZnO nanorods, an improved efficiency of 3.17% with a high FF beyond 60% was achieved.

关键词： electrochemical deposition density-controlled ZnO nanorods inverted polymer solar cells active area modification

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