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Classification of Citrus Plant Diseases Using Deep Transfer Learning

Computers, Materials & Continua 2022年第1期70卷 1401-1417页

作者： Muhammad Zia Ur Rehman Fawad Ahmed Muhammad Attique Khan Usman Tariq sajjad Shaukat Jamal Jawad Ahmad Iqtadar hussain Department of Electrical Engineering HITEC UniversityTaxilaPakistan Department of Computer Science HITEC UniversityTaxilaPakistan College of Computer Engineering and Sciences Prince Sattam Bin Abdulaziz UniversityAl-KhrajSaudi Arabia Department of Mathematics College of ScienceKing Khalid UniversityAbhaSaudi Arabia School of Computing Edinburgh Napier UniversityUK Department of Mathematics Statisticsand PhysicsQatar UniversityDoha2713Qatar

In recent years,the field of deep learning has played an important role towards automatic detection and classification of diseases in vegetables and *** in turn has helped in improving the quality and production of vegetables and *** fruits arewell known for their taste and nutritional *** are one of the natural and well known sources of vitamin C and planted *** are several diseases which severely affect the quality and yield of citrus *** this paper,a new deep learning based technique is proposed for citrus disease *** different pre-trained deep learning models have been used in this *** increase the size of the citrus dataset used in this paper,image augmentation techniques are ***,to improve the visual quality of images,hybrid contrast stretching has been *** addition,transfer learning is used to retrain the pre-trainedmodels and the feature set is enriched by using feature *** fused feature set is optimized using a meta-heuristic algorithm,the Whale Optimization Algorithm(WOA).The selected features are used for the classification of six different diseases of citrus *** proposed technique attains a classification accuracy of 95.7%with superior results when compared with recent techniques.

关键词： Citrus plant disease classification deep learning feature fusion deep transfer learning

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红壤有机矿物复合体吸附Cu(Ⅱ)的分子机制

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土壤学报 2021年第3期58卷 722-731页

作者：田雨杨建军 sajjad hussain 中国农业科学院农业环境与可持续发展研究所北京100081 农业农村部农业环境重点研究室北京100081 北京林业大学水土保持学院北京100083

采用元素分析、X射线衍射分析(XRD)、同步辐射扫描透射显微术(STXM)等手段,表征湖南祁阳红壤中颗粒态有机质(Particle organic matter,POM)和有机矿物复合体(Organo-mineral complexes,OMC)的元素组成、矿物组成,以及Cu(Ⅱ)在土体土壤(B... 详细信息

采用元素分析、X射线衍射分析(XRD)、同步辐射扫描透射显微术(STXM)等手段,表征湖南祁阳红壤中颗粒态有机质(Particle organic matter,POM)和有机矿物复合体(Organo-mineral complexes,OMC)的元素组成、矿物组成,以及Cu(Ⅱ)在土体土壤(Bulksoil,BS)和OMC表面的吸附行为、元素微区分布和分子固定机制,以明确实际土壤系统有机矿物复合体对铜吸附的能力及其固定机制。元素分析、XRD结果表明,土体土壤主要由OMC组成,富含黏土矿物,且所含有机质矿化度较BS和POM组分高。等温吸附实验结果表明,BS和OMC等温吸附曲线符合Langmuir和Freundlich方程,BS及OMC对Cu(Ⅱ)吸附等温线类似,且理论最大吸附量相当,说明供试土壤对Cu(Ⅱ)的吸附主要由OMC决定。STXM在亚微米尺度上表征了BS和OMC吸附样品中Cu与C、Fe、Al、Si的微区分布特征,发现Cu在红壤中分布具有空间异质性,Cu主要与羧基碳与铁氧化物形成的有机矿物复合体相结合,控制着红壤中Cu(Ⅱ)的形态分布与有效性。

关键词：颗粒密度分离铜土壤团聚体红壤有机矿物复合体同步辐射扫描透射显微术(STXM)

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Construction of robust and durable Cu_(2)Se-V_(2)O_(5) nanosheet electrocatalyst for alkaline oxygen evolution reaction

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Frontiers of Chemical Science and Engineering 2024年第6期18卷 71-83页

作者： Tauseef Munawar Ambreen Bashir Khalid Mujasam Batoo Saman Fatima Faisal Mukhtar sajjad hussain Sumaira Manzoor Muhammad Naeem Ashiq Shoukat Alim Khan Muammer Koc Faisal Iqbal Institute of Physics The Islamia University of BahawalpurBahawalpur 63100Pakistan King Abdullah Institute for Nanotechnology King Saud UniversityRiyadh 11451Saudi Arabia Hybrid Materials Center(HMC) Sejong UniversitySeoul 05006Republic of Korea Department of Nanotechnology and Advanced Materials Engineering Sejong UniversitySeoul 05006Republic of Korea Institute of Chemical Sciences Bahauddin Zakariya UniversityMultan 60800Pakistan Division of Sustainable Development College of Science and EngineeringHamad Bin Khalifa UniversityQatar FoundationDoha 34110Qatar

Reducing the production costs of clean energy carriers such as hydrogen through scalable water electrolysis is a potential solution for advancing the hydrogen *** the various material candidates,our group demonstrated transition-metal-based materials with tunable electronic characteristics,various phases,and ***,electrochemical water oxidation using Cu_(2)Se-V_(2)O_(5) as a non-precious metallic electrocatalyst via a hydrothermal approach is *** water-splitting performance of all the fabricated electrocatalysts was evaluated after direct growth on a stainless-steel *** electrochemically tuned Cu_(2)Se-V_(2)O_(5) catalyst exhibited a reduced overpotential of 128 mV and provided a reduced Tafel slope of 57 mV·dec^(−1) to meet the maximum current density of 250 mA·cm^(−2).The optimized strategy for interfacial coupling of the fabricated Cu_(2)Se-V_(2)O_(5) catalyst resulted in a porous structure with accessible active sites,which enabled adsorption of the intermediates and afforded an effective charge transfer rate for promoting the oxygen evolution ***,the combined effect of the catalyst components provided long-term stability for over 110 h in an alkaline solution,which makes the catalyst promising for large-scale practical *** aforementioned advantages of the composite catalyst overcome the limitations of low conductivity,agglomeration,and poor stability of the pure catalysts(Cu2Se and V2O5).

关键词： oxygen evolution reaction Cu_(2)Se-V_(2)O_(5)composite nanosheets metal-diffused ions accessible adsorption sites

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Eh耦合的稻田土壤镉、砷释放机制

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环境科学学报 2020年第5期40卷 1828-1835页

作者：张良东杨建军夏星 sajjad hussain 中国农业科学院农业环境与可持续发展研究所北京100081 农业农村部农业环境重点实验室北京100081 北京林业大学水土保持学院北京100081

镉(Cd)、砷(As)是稻田土壤的主要重(类)金属污染物,稻田土壤Cd、As的释放与其氧化还原电位(Eh)密切相关,但Eh耦合的稻田土壤砷、镉释放机制仍不清楚.本实验利用高精度土壤微反应器模拟Eh梯度变化过程(-250、-50、170 mV),研究其耦合的土... 详细信息

镉(Cd)、砷(As)是稻田土壤的主要重(类)金属污染物,稻田土壤Cd、As的释放与其氧化还原电位(Eh)密切相关,但Eh耦合的稻田土壤砷、镉释放机制仍不清楚.本实验利用高精度土壤微反应器模拟Eh梯度变化过程(-250、-50、170 mV),研究其耦合的土壤Cd、As及相关元素(Fe、Al、Ca、S、P、DOC)的释放特征,并结合同步辐射微区X射线荧光光谱技术(μ⁃XRF)探讨了不同Eh(-250、-50、170 mV)条件下稻田土壤As释放机制.结果表明:随着供试体系Eh从-250 mV升高至170 mV,土水混合液中DOC和pH值逐步下降,但Cd、As及相关Al、S、P、Fe元素浓度则同时升高.其中,Cd与S、Al增长均呈先缓后快特征,而As与P、Fe增长则呈先快后缓趋势,说明在Eh升高过程中Cd与S,以及As与Fe间密切相关.同步辐射μ⁃XRF分析发现,在低Eh条件下,土壤颗粒上As、Fe和S的高含量点信号重合,As⁃S及As⁃Fe的可决系数分别在Eh为-250 mV和170 mV条件下最高,说明在低Eh条件下As很可能主要受硫化铁控制,但在高Eh条件下则受铁氧化物影响.综上可知,低Eh条件下,As、Cd主要受到硫化铁的控制.随着Eh的升高,土壤Cd的活性逐渐升高,As的活性则受到铁氧化物控制.本研究结果可为理解土壤Cd、As共同释放机制及调控土壤Cd、As活性提供重要理论依据.

关键词：土壤微反应器水稻土氧化还原电势重金属同步辐射技术

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肉桂醛对沙门菌诱导的雏鸡肝损伤的保护作用

肉桂醛对沙门菌诱导的雏鸡肝损伤的保护作用

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作者： sajjad hussain 四川农业大学

学位级别：硕士

鸡沙门菌病是由沙门氏菌引起的一种常见细菌性疾病,严重危害养鸡业的健康发展,并给养鸡业带来了巨大的经济损失,尤其是在育雏阶段。鸡沙门氏菌感染常导致鸡肝脏发生严重的病理变化。由于抗生素的不合理使用及大量使用,临床上已经出现了... 详细信息

鸡沙门菌病是由沙门氏菌引起的一种常见细菌性疾病,严重危害养鸡业的健康发展,并给养鸡业带来了巨大的经济损失,尤其是在育雏阶段。鸡沙门氏菌感染常导致鸡肝脏发生严重的病理变化。由于抗生素的不合理使用及大量使用,临床上已经出现了多重耐药沙门氏菌菌株,而且抗生素在畜牧养殖过程中的使用受到限制。因此,迫切需要开发治疗鸡沙门氏菌感染的新药和新治疗策略,尤其是针对耐药性细菌感染。天然化合物已被证明对治疗这种细菌感染是有效的。肉桂醛为肉桂油中的主要有效成分,常用于防控畜禽细菌性疾病。现代研究表明肉桂醛具有抗菌、抗炎和抗氧化等药理作用。而肉桂醛对鸡沙门氏菌感染引起的雏鸡肝脏损伤的作用及机制尚不清楚。因此,本研究探讨了肉桂醛对鸡沙门氏菌腹腔感染诱导的雏鸡肝脏损伤的保护作用。本研究分为以下几个部分:1.肉桂醛对鸡沙门氏菌感染雏鸡的肝损伤及炎症反应的影响90只1日龄雏鸡,随机平均分成3组,分别为对照组(CON)、攻毒组(SG)和处理组(SG+CA)。在4日龄时(0 DPI),SG和SG+CA组每只鸡腹腔注射3×10CFU/m L及沙门氏菌菌液0.3 ml,SG+CA组再口服肉桂醛150 mg/kg。连续给药3天。其中CON组口服生理盐水。在1、3、5 DPI每组分别采集10只雏鸡的血液样本,并于当日处死采集肝脏样本。通过检测沙门氏菌在肝组织的定植、血清中ALT和AST水平、肝脏中相关细胞炎症因子的基因(IL-1β、IL-6、IL-12、NF-кB、TNF-α、My D-88、IL-8、IL-10和i NOS)的相对表达量和由鸡沙门菌引起的雏鸡肝脏形态学损伤(H&E染色和透射电镜技术)研究肉桂醛对雏鸡肝脏的保护作用。实验结果显示经肉桂醛处理后,雏鸡的肝脏沙门菌定殖量明显降低(P<0.05),其中感染后第3天雏鸡肝脏中细菌定殖量从SG组的4.08±0.06(Log CFU/g)降到了SG+CA组的2.97±0.1(Log CFU/g)。血清ALT和AST含量实验结果显示雏鸡感染鸡沙门菌后,两者含量显著升高,肝脏损伤严重,而肉桂醛对肝损伤的保护作用显著。其中,在3DPI,血清ALT和AST浓度分别从29.51±1.7 IU/L(SG组)降到19.36±1.5 IU/L(SG+CA组)和从29.14±1.36 IU/L(SG组)降到15.50±0.94 IU/L(SG+CA组)。肉桂醛还具有一定的抗炎能力,可以显著降低由鸡沙门菌诱导的雏鸡肝脏中促炎因子(IL-1β、IL-6、IL-12、NF-кB、TNF-α和My D-88)的相对表达量,和提高了抗炎因子(IL-8、IL-10和i NOS)的相对表达量。组织病理学结果显示,沙门氏菌感染引起肝组织出血、坏死和免疫细胞浸润,肉桂醛处理组肝细胞结构正常。电镜观察发现,沙门氏菌感染后的肝细胞核膜变形,胞内空泡化,线粒体等细胞器受损,肉桂醛处理组肝细胞形态相对正常。由此可见,肉桂醛对鸡沙门氏菌攻毒雏鸡的炎症反应及肝细胞损伤具有一定的保护作用。2.肉桂醛对鸡沙门氏菌感染的雏鸡肝脏线粒体及细胞能量代谢的影响沙门氏菌感染可损伤细胞线粒体,导致线粒体膜电位下降和活性氧(ROS)的异常,最终导致细胞凋亡。本节研究了肉桂醛对鸡肝细胞ROS生成、细胞膜电位(Ψm)、细胞色素c释放、caspase 3活性和肝脏ATP含量的影响。研究结果显示雏鸡在感染鸡沙门氏菌后,其肝脏中的ROS含量显著升高(P<0.01,与对照相比),而肉桂醛可显著降低鸡沙门菌感染后的雏鸡肝脏中的ROS含量(P<0.05,与攻毒组相比)。同时雏鸡感染鸡沙门氏菌后,肝脏中线粒体损伤严重,其线粒体膜电位和细胞色素c的释放量显著升高(P<0.01,与对照相比),经肉桂醛处理后线粒体膜电位和细胞色素c的释放量明显下降。沙门氏菌可以诱导雏鸡肝脏中的ATP含量增加,经肉桂醛处理后ATP的含量显著下降(P<0.05,与攻毒组相比)。细胞凋亡重要标志物caspase 3的含量48.65±0.3ng/ml)在鸡沙门氏菌感染3天后明显升高,提示感染后雏鸡肝脏的细胞凋亡严重,肉桂醛处理后可以明显降低肝脏细胞凋亡,caspase 3的含量为(36.35±0.9)。肉桂醛对鸡沙门氏菌攻毒雏鸡线粒体健康和肝细胞能量代谢具有保护作用。3.肉桂醛处理鸡肝细胞后鸡沙门氏菌感染的转录组分析为了解鸡沙门氏菌对雏鸡肝脏损伤过程中的分子机制以及肉桂醛对调控机制。通过Hiseq xten/Nova seq 6000测序平台(RNA测序Illumina Platform)对不同时期和不同处理方式的雏鸡肝脏进行转录组分析。高通量RNA测序获得了高质量、测序深度足够的数据。结合GO功能分析和KEGG通路分析,探讨肉桂醛对鸡沙门氏菌诱导的肝细胞代谢变化的作用机制。转录组分析表明,鸡沙门氏菌通过调节AMPK-m TOR

关键词：鸡沙门氏菌肉桂醛肝细胞线粒体

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The Rotationally Symmetric Flow of Micropolar Fluids in the Presence of an Infinite Rotating Disk

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Applied Mathematics 2015年第2期6卷 430-439页

作者： Atif Nazir sajjad hussain Mohammad Shafique Mathematics Group Coordinator Yanbu Industrial College Yanbu Saudi Arabia Department of Mathematics College of Science Al-Zulfi Saudi Arabia Ex-AP Department of Mathematics Gomal University D. I. Khan Pakistan

The rotationally symmetric flow of a micropolar fluid in the presence of an infinite rotating disk has been studied numerically. The equations of motion are reduced to a system of ordinary differential equations, which in turn are solved numerically using SOR method and Simpson’s (1/3) rule. The results are calculated for different values of the parameter s (the ratio of angular velocities of disc and fluid) and the suction parameter a. Moreover, three different sets of the values of non-dimensional material constants related to micropolar behavior of the fluid have been chosen arbitrarily. The calculations have been carried out using three different grid sizes to check the accuracy of the results. The research concludes that the micropolar fluids flow resembles with that of Newtonian fluids when the material constants become close to zero. The comparison of these results is presented for possible values of the parameter s.

关键词： Micropolar Fluids Rotating Disk and Numerical Study

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Role of Cetyltrimethylammonium Bromide in the Green Synthesis of Silver Nanoparticles Using Mimusops elengi , Linn. (Maulsari) Leaf Extract

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Advances in Nanoparticles 2016年第1期5卷 44-52页

作者： Rabia Ahmad sajjad hussain Parrey Qamer Faisal Department of Chemistry Faculty of Natural Sciences Jamia Millia Islamia (Central University) New Delhi India

Mimusops elengi (Maulsari) is a medicinal plant (showing;antioxidant, antimycotic, antidiabetic, analgesic activity, etc.). Conventional UV-visible spectrophotometric technique in the presence of CTAB and transmission electron microscopic technique both in the presence and absence of CTAB were used to determine the morphology of silver nanoplates (AgNP) using Mimusops elengi (Maulsari) aqueous leaves extract for the first time. Cetyltrimethylammonium bromide (CTAB) has no significant effect on the shape of the spectra and position of SPR bands. Effects of various CTAB were also discussed in the green extra-cellular synthesis of AgNP using Mimusops elengi (Maulsari) leaves extract.

关键词： Nanostructures Chemical Synthesis Transmission Electron Microscopy Surface Properties

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New Ninth Order J-Halley Method for Solving Nonlinear Equations

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Applied Mathematics 2013年第12期4卷 1709-1713页

作者： Farooq Ahmad sajjad hussain Sifat hussain Arif Rafiq Centre for Advanced Studies in Pure and Applied Mathematics B. Z. Uni. Multan Pakistan Department of Mathematics COMSATS Institute of Information Technology Islamabad Pakistan Punjab Higher Education Department Principal Govt. Degree College Darya Khan Bhakkar Pakistan

In the paper [1], authors have suggested and analyzed a predictor-corrector Halley method for solving nonlinear equations. In this paper, we modified this method by using the finite difference scheme, which had a quantic convergence. We have compared this modified Halley method with some other iterative methods of ninth order, which shows that this new proposed method is a robust one. Some examples are given to illustrate the efficiency and the performance of this new method.

关键词： Halley Method Jarratt Method Iterative Methods Convergence Order Numerical Examples

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Numerical Solution for Accelerated Rotating Disk in a Viscous Fluid

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Applied Mathematics 2013年第6期4卷 899-902页

作者： sajjad hussain Farooq Ahmad Mohammad Shafique Sifat hussain Centre for Advanced Studies in Pure and Applied Mathematics Bahauddin Zakariya University Multan Pakistan Department of Mathematics Gomal University Dera Ismail Khan Pakistan Punjab Higher Education Department Govt. Degree College Darya Khan Bhakkar Pakistan

The problem of a disk rotating in a viscous fluid has been investigated. The disk is accelerated with angular velocity proportional to time. Employing suitable similarity transformations the governing partial differential equations are transformed in to ordinary differential form. The resulting equations are solved numerically using SOR method and Simpson’s (1/3) rule. The results have been improved by using Richardson’s extrapolation. The effect of the non-dimensional parameter s which measures unsteadiness is observed on velocity components, skin friction coefficient and torque of the disk.

关键词： Newtonian Fluids Numerical Analysis Rotating Disk

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Non-noble metal single-atom catalyst of Co_(1)/MXene(Mo_(2)CS_(2))for CO oxidation

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Science China Materials 2021年第3期64卷 651-663页

作者： Shamraiz hussain Talib Sambath Baskaran Xiaohu Yu Qi Yu Beenish Bashir Shabbir Muhammad sajjad hussain Xuenian Chen Jun Li Department of Chemistry and Key Laboratory of Organic Optoelectronics&Molecular Engineering of Ministry of Education Tsinghua UniversityBeijing100084China Department of Chemistry Southern University of Science and TechnologyShenzhen518055China Shaanxi Key Laboratory of Catalysis Shaanxi University of TechnologyHanzhong723000China Research Center for Advanced Materials Sciences(RCAMS) King Khalid UniversityAbha61413P.O.Box 9004Saudi Arabia School of Chemistry and Chemical Engineering Henan Key Laboratory of Boron Chemistry and Advanced Energy MaterialsHenan Normal UniversityXinxiang453007China

MXene is a variety of new two-dimensional(2D)materials with early transition metal carbides,nitrides,and *** chemical studies have been carried out on the geometries,electronic structures,stability and catalytic properties of a non-noble metal single-atom catalyst(SAC)with single Co atom anchored on MXene materials of Mo_(2)CS_(2).The Co adatom anchored on top of the Mo atom of this MXene is found to be rather stable,and this SAC is appropriate for CO *** charge transfers from the surface to the adsorbed CO and O2 play a significant role in the activation of these molecules on Co_(1)/Mo_(2)CS_(2).With this catalyst,the Eley-Rideal(ER),Langmuir-Hinshelwood(LH),and Termolecular Eley-Rideal(TER)mechanisms are explored for CO *** find that,while all the three mechanisms are feasible at low temperature,Co_(1)/Mo_(2)CS_(2) possesses higher catalytic activity for CO oxidation through the TER mechanism that features an intriguing OC(OO)CO intermediate(IM)adsorbed on Co single *** calculated activation energy barriers of the rate-limiting step are 0.67 eV(TER),0.78 eV(LH)and 0.88 eV(ER),*** present study illustrates that it is promising to develop and design low-cost,non-noble metal SACs using MXene types of 2D materials.

关键词： heterogeneous catalysis 2D MXene monolayer CO oxidation DFT calculations Co1/Mo2CS2 single-atom catalyst

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