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中国化学会第十四届全国生物无机化学学术会议

作者： nafees muhammad Dan-jie Zhou Liang-Nan Ji Zong-Wan Mao MOE Key Laboratory of Bioinorganic and Synthetic Chemistry School of Chemistry Sun Yat-sen University

Platinum(Ⅳ) complexes are prodrugs of cisplatin with multiple potential advantages over platinum(Ⅱ)*** chemical point of view,Platinum(Ⅳ) complexes offers two additional axial ligands in their coordination sphere to fine tune there lipophilicity and redox *** acid or LCA is a secondary bile acid,gains much attention in recent years as potential chemotherapeutic agent which in vitro can selectively kills cancer cells while sparing normal ***,it also act as an anti-aging molecule by delaying chronological lifespan of budding yeast cells through altering the metabolic processes such as respiration and reactive oxygen species (ROS) production in the *** have designed and synthesized a lithocholic acid conjugated platinum(Ⅳ)complex (LT-Platin) and its successful synthesizes was conformed with electron spray ionization mass spectroscopy and H,C and Pt NMR *** potential of LT-Platin to reduce into cytotoxic platinum (Ⅱ) complex was verified with cyclic voltammetry (CV) and inductively coupled plasma mass spectrometry (ICP-MS).LT-Platin spontaneously self-assembles in aqueous solution to form carrier-free nanoparticles with an average size diameter of 100-150 nm as confirmed by transmission electron microscopy (TEM) and dynamic light scattering (DLS).In addition,it showed a time dependent higher cellular uptake in tested cell lines with possible energy-dependent cellular entrance *** assay reveals that the LT-Platin showed selective nature toward human lung cancer cells over normal cells compared to its parental compound ***,it shown to be very sensitive against cisplatin resistant lung and breast cancer cells which is also ascribed with its higher cellular uptake but not to its *** studies indicates that the complex causes cell cycle arrest at S phase and showed apoptosis-inducing ability in A549 *** a conclusion,our study reveals that conjugation of c

关键词： Platinum(Ⅳ) prodrugs Bile acid Self-assembly Anticancer activity

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Aspect Extraction Approach for Sentiment Analysis Using Keywords

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Computers, Materials & Continua 2023年第3期74卷 6879-6892页

作者： nafees Ayub muhammad Ramzan Talib muhammad Kashif Hanif muhammad Awais Department of Computer Science Government College UniversityFaisalabad38000Pakistan Department of Software Engineering Government College UniversityFaisalabad38000Pakistan

Sentiment Analysis deals with consumer reviews available on blogs,discussion forums,E-commerce websites,andApp *** online reviews about products are also becoming essential for consumers and companies as *** rely on these reviews to make their decisions about products and companies are also very interested in these reviews to judge their products and *** reviews are also a very precious source of information for requirement *** companies and consumers are not very satisfied with the overall sentiment;they like fine-grained knowledge about consumer *** to this,many researchers have developed approaches for aspect-based sentiment *** existing approaches concentrate on explicit aspects to analyze the sentiment,and only a few studies rely on capturing implicit *** paper proposes a Keywords-Based Aspect Extraction method,which captures both explicit and implicit *** also captures opinion words and classifies the sentiment about each *** applied semantic similarity-basedWordNet and SentiWordNet lexicon to improve aspect *** used different collections of customer reviews for experiment purposes,consisting of eight datasets over seven *** compared our approach with other state-of-the-art approaches,including Rule Selection using Greedy Algorithm(RSG),Conditional Random Fields(CRF),Rule-based Extraction(RubE),and Double Propagation(DP).Our results have shown better performance than all of these approaches.

关键词： Sentiment analysis aspect extraction keywords-based machine learning

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Image Tampering Detection Algorithm Based on Deep Learning

Image Tampering Detection Algorithm Based on Deep Learning

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作者： muhammad Hassan nafees 北京邮电大学

学位级别：硕士

本文提出了一种完全基于深度学习算法的精确、可靠、鲁棒的篡改检测网络和方法,并提出了一种新的针对复制-移动图像篡改和伪造的检测网络。利用深度学习的高效检测技术代替传统的数字图像取证。首先,我们提出了对抗图像伪造,这通常需要... 详细信息

本文提出了一种完全基于深度学习算法的精确、可靠、鲁棒的篡改检测网络和方法,并提出了一种新的针对复制-移动图像篡改和伪造的检测网络。利用深度学习的高效检测技术代替传统的数字图像取证。首先,我们提出了对抗图像伪造,这通常需要不同形式的网络进行组合,并提出了一个深层的、统一的神经网络架构。与现有的其他方法相比,该架构是一个端到端的网络,在不需要进行不必要的前/后处理的情况下进行检测和定位。篡改检测网络是一个完全收敛的网络,它适用于任何大小的图像和几种已知形式的伪造,即拼接、复制、消除、增强或未知形式。通过建立局部异常,评价局部异常,提供一种新的长期记忆方法,定义了局部异常检测问题。最后,进行了验证实验,系统地改进了所提出的网络结构。其次,将复制粘贴篡改数据集引入到Mask R-CNN的训练中,对Mask R-CNN网络进行改进,使其适合于篡改检测,并对整个实验过程进行了优化。然后,选取各种被篡改的图像作为数据集,数据集中被篡改的对象类型包括人、动物、家具、建筑物等。在满足目标类型多样性检测要求的同时,可以使目标的状态尽可能的多样化。在网络结构方面,从实际情况出发,根据实际的处理器和数据集,对网络结构进行配置,以获得最佳的学习效果。Mask R-CNN具有更好的性能、准确度和更少的时间消耗。该网络模型方法具有良好的可扩展性,可以扩展到多种形式的篡改检测技术中。实验结果表明,该方法具有良好的效率和准确性。

关键词：图像篡改检测操纵网络卷积神经网络 Mask R-CNN 深层神经网络图像复制移动伪造区域建议网络

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Socio-political and ecological stresses on traditional pastoral systems:A review

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Journal of Geographical Sciences 2019年第10期29卷 1758-1770页

作者： muhammad Khurshid MOHAMMAD nafees ABDULLAH Khan MEHMET Somuncu ASHFAQ Ahmad Khan WAJID Rashid Department of Environmental Sciences The University of HaripurKhyber Pakhtunkhwa 22620 Pakistan Department of Environmental Sciences University of PeshawarPeshawar 25000 Pakistan Department of Geography Ankara UniversitySihhiye 06100 Ankara Turkey Department of Geography Karabuk UniversityKarabuk 78000 Turkey Department of Environmental Sciences The University of SwatSwat 19130 Pakistan

Pastoralism is a viable socio-economic system-shaped by landless and agro-pastoral communities in many pastoral regions of the world. This system is mainly based on seasonal migration of pastoralists and their livestock herds between upland and lowland pastures. Traditionally pastoral activities make significant contributions to mountain livelihood subsistence, regional economies and environmental sustainability. However, the pastoralist’s lifestyle and their economies are increasingly confronted to various socio-political, economic and ecological stresses from the last few decades. Extensive literature reviewed on this subject with the aim to explore the current emerging challenges faced by pastoral communities in different pastoral regions. It has been revealed from literature that the prevalent socio-political and economic stress on pastoralism caused by modernization, insecure land tenure, integration of market economy, civil insecurities and pastoralist’s exclusion in states policies while ecological stress on pastoral activities emerged with increasing focus on nature conservation in pastoral regions and climate change induced hazards and disasters. As a consequence of these challenges, pastoral households are abandoning livestock herding–as a traditional way of life and are in continuous transition to transform their pastoral practices and institutions. Thus, the attention and consultation of key stakeholders are needed toward pastoral resource development that improve and sustain traditional pastoral practices in a socio-politically and ecologically stressed environment of the world.

关键词： pastoralism marginalization pastoral system pastures livestock pastoralists

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Back contact interfacial modification mechanism in highly-efficient antimony selenide thin-film solar cells

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Journal of Energy Chemistry 2023年第5期80卷 256-264,I0007页

作者： Junhui Lin Guojie Chen nafees Ahmad muhammad Ishaq Shuo Chen Zhenghua Su Ping Fan Xianghua Zhang Yi Zhang Guangxing Liang Shenzhen Key Laboratory of Advanced Thin Films and Applications Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060GuangdongChina Institute of Fundamental and Frontier Science University of Electronic Science and Technology of ChinaChengdu 610054SichuanChina Univ Rennes CNRSISCR(Institut des Sciences Chimiques de Rennes)UMR 6226Rennes F-35000France Institute of Photoelectronic Thin Film Devices and Technology and Tianjin Key Laboratory of Thin Film Devices and Technology Nankai UniversityTianjin 300350China

Antimony selenide(Sb_(2)Se_(3))is a potential photovoltaic(PV)material for next-generation solar cells and has achieved great development in the last several *** properties of Sb_(2)Se_(3)absorber and back contact influence the PV performances of Sb_(2)Se_(3)solar ***,optimization of back contact characteristics and absorber orientation are crucial steps in raising the power conversion efficiency(PCE)of Sb_(2)Se_(3)solar *** this work,MoO2was introduced as an intermediate layer(IL)in Sb_(2)Se_(3)solar cells,and comparative investigations were *** growth of(211)-oriented Sb_(2)Se_(3)with large grains was facilitated by introducing the MoO2IL with suitable *** MoO2IL substantially lowered the back contact barrier and prevented the formation of voids at the back contact,which reduced the thickness of the MoSe2interface layer,inhibited carrier recombination,and minimized bulk and interfacial defects in ***,significant optimization enhanced the open-circuit voltage(VOC)of solar cells from 0.481 V to 0.487 V,short-circuit current density(JSC)from 23.81 m A/cm^(2)to 29.29 m A/cm^(2),and fill factor from 50.28%to 57.10%,which boosted the PCE from 5.75%to 8.14%.

关键词： Sb_(2)Se_(3)solar cells MoO_(2)intermediate layer Back contact Defects

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Efficient Algorithm for Prolonging Network Lifetime of Wireless Sensor Networks

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Tsinghua Science and Technology 2011年第6期16卷 561-568页

作者： Md nafees Rahman M A Matin Department of Electrical Engineering and Computer Science North South University

One of the fundamental design challenges in designing a Wireless Sensor Network （WSN） is to maximize the network lifetime, as each sensor node of the network is equipped with a limited power battery. To overcome this challenge, different methods were developed in the last few years using such techniques as network protocols, data fusion algorithms using low power, energy efficient routing, and locating optimal sink position. This paper focuses on finding the optimal sink position. Relay nodes are introduced in conjunction with the sensor nodes to mitigate network geometric deficiencies since in most other approaches the sensor nodes close to the sink become heavily involved in data forwarding and, thus, their batteries are quickly depleted. A Particle Swarm Optimization （PSO） based algorithm is used to locate the optimal sink position with respect to those relay nodes to make the network more energy efficient. The relay nodes communicate with the sink instead of the sensor nodes. Tests show that this approach can save at least 40% of the energy and prolong the network lifetime.

关键词： wireless sensor network lifetime sensor node relay node particle swarm optimization sink

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Nature-inspired Hybrid Optimization Algorithms for Load Flow Analysis of Islanded Microgrids

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Journal of Modern Power Systems and Clean Energy 2020年第6期8卷 1250-1258页

作者： Saad Mohammad Abdullah Ashik Ahmed Quazi nafees Ul Islam the Department of Electrical and Electronic Engineering Islamic University of TechnologyBoard BazarGazipur 1704Bangladesh

Load flow analysis is a significant tool for proper planning,operation,and dynamic analysis of a power system that provides the steady-state values of voltage magnitudes and angles at the fundamental ***,due to the absence of a slack bus in an islanded microgrid,modified load flow algorithms should be adopted considering the system frequency as one of the solution *** paper proposes the application of nature-inspired hybrid optimization algorithms for solving the load flow problem of islanded *** nature-inspired algorithms such as genetic algorithm(GA),differential evolution(DE),flower pollination algorithm(FPA),and grasshopper optimization algorithm(GOA)are separately merged with imperialistic competitive algorithm(ICA)to form four hybrid algorithms named as ICGA,ICDE,ICFPA,and *** of these algorithms are tested on the 6-bus test system and the modified IEEE 37-bus test system.A comparison among the proposed algorithms is carried out in terms of statistical analysis conducted using SPSS statistics *** the statistical analysis,it is identified that on an average,ICDE takes less number of iterations and consequently needs less execution time compared with other algorithms in solving the load flow problem of islanded microgrids.

关键词： Nature-inspired hybrid algorithm global optimization islanded microgrid load flow analysis

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Identification of Type of a Fault in Distribution System Using Shallow Neural Network with Distributed Generation

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Energy Engineering 2023年第4期120卷 811-829页

作者： Saurabh Awasthi Gagan Singh nafees Ahamad Department of Electrical and Electronics&Communication Engineering DIT UniversityDehradun248001India

A distributed generation system(DG)has several benefits over a traditional centralized power ***,the protection area in the case of the distributed generator requires special attention as it encounters stability loss,failure re-closure,fluctuations in voltage,*** thereby,it demands immediate attention in identifying the location&type of a fault without delay especially when occurred in a small,distributed generation system,as it would adversely affect the overall system and its *** the past,several methods were proposed for classification and localisation of a fault in a distributed generation *** of those methods were accurate in identifying location,but the accuracy in identifying the type of fault was not up to the acceptable *** proposed work here uses a shallow artificial neural network(sANN)model for identifying a particular type of fault that could happen in a specific distribution network when used in conjunction with distributed ***,a distribution network consisting of two similar distributed generators(DG1 and DG2),one grid,and a 100 Km distribution line is ***,different voltages and currents corresponding to various faults(line to line,line to ground)at different locations are tabulated,resulting in a matrix of 500×18 ***,the sANN is formulated for identifying the types of faults in the system in which the above-obtained data is used to train,validate,and test the neural *** overall result shows an unprecedented almost zero percent error in identifying the type of the faults.

关键词： Distribution network distributed generation power system modeling fault identification neural network renewable energy systems

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Anode interfacial modification for non-fullerene polymer solar cells:Recent advances and prospects

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InfoMat 2022年第12期4卷 33-73页

作者： nafees Ahmad Guangxing Liang Ping Fan Huiqiong Zhou Shenzhen Key Laboratory of Advanced Thin Films and Applications Key Laboratory of Optoelectronic Devices and SystemsCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhenPeople's Republic of China CAS Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and TechnologyBeijingPeople's Republic of China

Recently,the power conversion efficiency(PCE)of single-junction non-fullerene polymer solar cells(NF-PSCs)has surpassed 19%due to the fast development of novel donor polymers,NF-acceptors,device engineering,and interlayer *** anode interlayer(AIL)plays a vital role in improving the efficiency and stability of *** challenges and opportunities in this research area encourage researchers to pursue great innovation in developing new materials and strategies for highly efficient *** review summarizes the recent development of AIL materials and their modification strategies in single-junction ***,a brief introduction,key functions,basic requirements,and peculiar features of AILs when employed in NF-PSCs are ***,the impact of AIL materials(including organic,inorganic,and hybrid materials)on the PCE and the stability of NF-PSCs are ***,the fabrication of large-area devices and related issues are *** summary and the future challenges regarding efficient AIL are summarized in the last section of this review.

关键词： anode interlayer efficiency hole extraction non-fullerene polymer solar cells stability

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Evaluation of antidepressant activity of methanolic and hydroalcoholic extracts of Acorus calamus *** through tail suspension test and forced swimming test of mice

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Journal of Traditional Chinese Medical Sciences 2020年第3期7卷 301-307页

作者： Shaista Yousuf Shiekh Marifatul Haq Akhtar Rasool muhammad Zulfajri Marlia Mohd Hanafiah Huda nafees Shoeiba Tasneem Mohammed Mahboob Department of Pharmacology University of KashmirJammu and Kashmir190006India Department of Botany University of Kashmir SrinagarJammu and Kashmir190006India Department of Environmental Sciences Osmania UniversityHyderabadTelangana500007India Department of Chemistry Education Serambi Mekkah UniversityBanda Aceh23245Indonesia Department of Earth Sciences and Environment Faculty of Science and TechnologyThe National University of MalaysiaBangi43600Malaysia Center for Tropical Climate Change System Institute of Climate ChangeThe National University of MalaysiaBangi43600Malaysia Faculty of Unani Medicine Department of SaidlaAligarh Muslim UniversityAligarh202002India Department of Zoology Osmania UniversityHyderabadTelangana500007India Applied Biology Division CSIR-Indian Institute of Chemical TechnologyHyderabad500007India

Objective:Acorus calamus(AC)L.(Araceae)is an annual semi-aquatic and aromatic plant found in Europe,North America and *** rhizomes are often used by Native Americans,Americans,and Chinese as well as by other *** studies and documents have shown their use in various disease treatments,such as insomnia,mental disorders,diabetes mellitus,epilepsy,inflammation,asthma,neuropathic pain,and *** this study,the antidepressant activity of methanolic and hydroalcoholic extracts of the AC rhizome part in mice was ***:Three doses of methanolic extract of AC rhizome(MEACR)(25,50 and 100 mg/kg ***),three doses of hydroalcoholic extract of AC rhizome(HAACR)(100,200 and 400 mg/kg ***),and standards(imipramine,15 mg/kg *** and fluoxetine,20 mg/kg ***)was daily oral administration to the mice for consecutive 14 *** extract effect on the immobility time was monitored by a tail suspension test(TST)and a forced swimming test(FST).Monoamine oxidase(MAO)levels were also analyzed using standard ***:The optimum antidepressant activity was viewed at 100 mg/kg *** of MEACR extract and400 mg/kg *** of HAACR extract with 23.82%and 20.59%immobility period reduction,***,the extracts weakened the FST-induced elevation of MAO activity significantly and returned to near-normal levels of neurotransmitters in the brain.100 mg/kg *** or above of MEACR extract significantly prevented the MAO-A and MAO-B activities in mice brain at a dose-dependent ***,just 400 mg/kg *** of HAACR extract prevented the activity of MAO-A and *** and imipramine showed a tendency to prevent the activity of MAO-A and ***:This study suggests that AC rhizome extract mediated antidepressant activity by modulating the central neurochemical and hypothalamic-pituitary-adrenal(HPA)axis in response to FST and TSTinduced ***,AC rhizome extract can be used as a valuable plant supplement to treat depr

关键词： Acorus calamus Rhizome Antidepressant activity Methanolic extract Hydroalcoholic extract Tail suspension test Forced swim test Monoamine oxidase Mice

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