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A two-branch multiscale spectral-spatial feature extraction network for hyperspectral image classification

Journal of Information and Intelligence 2024年第3期2卷 224-235页

作者： aamir ali Caihong Mu Zeyu Zhang Jian Zhu Yi Liu Key Laboratory of Intelligent Perception and Image Understanding of Ministry of Education Collaborative Innovation Center of Quantum Information of Shaanxi ProvinceSchool of Artificial IntelligenceXidian UniversityXi'an 710071China school of Electronic Engineering Xidian UniversityXi'an 710071China

In the field of hyperspectral image(HSI)classification in remote sensing,the combination of spectral and spatial features has gained considerable *** addition,the multiscale feature extraction approach is very effective at improving the classification accuracy for HSIs,capable of capturing a large amount of intrinsic ***,some existing methods for extracting spectral and spatial features can only generate low-level features and consider limited scales,leading to low classification results,and dense-connection based methods enhance the feature propagation at the cost of high model *** paper presents a two-branch multiscale spectral-spatial feature extraction network(TBMSSN)for HSI *** design the mul-tiscale spectral feature extraction(MSEFE)and multiscale spatial feature extraction(MSAFE)modules to improve the feature representation,and a spatial attention mechanism is applied in the MSAFE module to reduce redundant information and enhance the representation of spatial fea-tures at *** we densely connect series of MSEFE or MSAFE modules respectively in a two-branch framework to balance efficiency and effectiveness,alleviate the vanishing-gradient problem and strengthen the feature *** evaluate the effectiveness of the proposed method,the experimental results were carried out on bench mark HsI datasets,demonstrating that TBMSSN obtained higher classification accuracy compared with several state-of-the-art methods.

关键词： Hyperspectral image classification Multiscale spectral-spatial information Two-branch architecture

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叶面施硒对燕麦籽粒营养品质的影响

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作物杂志 2024年

作者：张丽娜杨文平苏苗张之玄李军辉 aamir ali 陈杰高志强杨珍平山西农业大学农学院/黄土高原特色作物优质高效生产省部共建协同创新中心华北理工大学生命科学学院

为探究叶面施硒（Se）对燕麦籽粒硒积累和营养品质的强化作用，以坝莜6号，坝莜12号，白燕2号3个燕麦品种为研究对象设置田间试验，于扬花期叶面喷施不同浓度(12 g/hm2，Se1；36 g/hm2，Se2)的硒营养液(SeO32-)，同时以不喷硒的处理作... 详细信息

为探究叶面施硒（Se）对燕麦籽粒硒积累和营养品质的强化作用，以坝莜6号，坝莜12号，白燕2号3个燕麦品种为研究对象设置田间试验，于扬花期叶面喷施不同浓度(12 g/hm2，Se1；36 g/hm2，Se2)的硒营养液(SeO32-)，同时以不喷硒的处理作为对照，通过测定灌浆期籽粒硒含量以及成熟期营养品质（氨基酸和脂肪酸），分析叶面施硒对燕麦灌浆期籽粒硒积累及成熟期营养品质的强化作用。结果表明，随灌浆时间延长，燕麦籽粒硒含量呈先升高后降低的趋势。其中，成熟期施硒各处理籽粒硒含量均在0.10～0.30 mg/kg的国家标准范围内，显著高于不施硒的对照，且在Se2处理下籽粒硒含量最高为0.16 mg/kg。与不施加硒肥的对照相较，施硒明显提高了3个品种燕麦籽粒中总氨基酸的含量：低氨基酸品种坝莜6号的总氨基酸含量增加了2.13%～10.53%，高氨基酸品种白燕2号的总氨基酸含量增加了7.44%～9.37%。与不施硒的对照相比，施硒促进了3个燕麦品种籽粒中不同脂肪酸的含量，且品种类型、硒肥浓度及二者的互作效应的影响均达到极显著水平（P＜0.01）。说明叶面喷施硒肥能显著促进燕麦籽粒硒积累，强化籽粒氨基酸和不饱和脂肪酸的含量，其中以Se2处理的效果更好。

关键词：燕麦硒肥氨基酸脂肪酸

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“石”刻准备着:方寸间感悟中国文化之美

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神州学人 2024年第8期 46-47页

作者： [巴基斯坦]阿里赵阳平(指导) 不详

来中国留学之前,我在中国能源建设集团天津电力建设有限公司驻巴基斯坦海外公司做机械工程师。和中国同事一起工作的这些年,他们的专业、勤奋、团结等让我对他们的国家充满好奇,在家人的鼓励和朋友的推荐下,2021年,我以优异的成绩成功... 详细信息

来中国留学之前,我在中国能源建设集团天津电力建设有限公司驻巴基斯坦海外公司做机械工程师。和中国同事一起工作的这些年,他们的专业、勤奋、团结等让我对他们的国家充满好奇,在家人的鼓励和朋友的推荐下,2021年,我以优异的成绩成功申请到了中国政府奖学金,获得了赴中国地质大学(武汉)攻读机械工程专业硕士的机会。

关键词：机械工程师能源建设中国政府奖学金文化之美中国地质大学(武汉) 工程专业硕士巴基斯坦

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Thermophoresis and concentration effects in a fourth grade peristaltic flow with convective walls

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Journal of Central South University 2017年第7期24卷 1654-1662页

作者： ali aamir Asghar S Awais M Department of Mathematics COMSATS Institute of Information TechnologyAttock 43600Pakistan Department of Mathematics COMSATS Institute of Information TechnologyIslamabad 44000Pakistan Department of Mathematics King Abdulaziz UniversityJeddah 21432Saudi Arabia

In this investigation,we have studied the peristaltic fluid flow in an asymmetric channel with convective *** grade fluid model has been utilized in view of the fact that the results of all other differential type models can be deduced as the special *** effects of heat and mass transfer are *** thermophoresis effects occur in the energy *** heat and mass boundary conditions have been given special *** wave length and low Reynolds number approximations are utilized for the *** analytic solutions for the velocity,temperature and concentration profiles are calculated using perturbation technique and elaborated in the form of graphical observations for various physical quantities.

关键词： fourth grade fluid convective boundary conditions pumping and trapping peristalsis

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Existence of a Hartmann layer in the peristalsis of Sisko fluid

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Chinese Physics B 2014年第5期23卷 368-372页

作者： Saleem Asghar Tayyaba Minhas aamir ali Department of Mathematics COMSATS Institute of Information Technology Department of Mathematics King Abdul Aziz University CNRS UMR 7351 Laboratoire Jean Alexandre DieudonneUniversite de Nice Sophia Antipolis

Analytical solutions for the peristaltic flow of a magneto hydrodynamic （MHD） Sisko fluid in a channel, under the effects of strong and weak magnetic fields, are presented. The governing nonlinear problem, for the strong magnetic field, is solved using the matched asymptotic expansion. The solution for the weak magnetic field is obtained using a regular perturbation method. The main observation is the existence of a Hartman boundary layer for the strong magnetic field at the location of the two plates of the channel. The thickness of the Hartmann boundary layer is determined analytically. The effects of a strong magnetic field and the shear thinning parameter of the Sisko fluid on the velocity profile are presented graphically.

关键词： magneto hydrodynamic Sisko fluid asymmetric channel Peristaltic flow non-Newtonian fluid

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Optimal Site and Size of Distributed Generation Allocation in Radial Distribution Network Using Multi-objective Optimization

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Journal of Modern Power Systems and Clean Energy 2021年第2期9卷 404-415页

作者： aamir ali M.U.Keerio J.A.Laghari the Department of Electrical Engineering Quaid-E-Awam University of Engineering Science and TechnologyNawabshahPakistan

Distributed generation(DG)allocation in the distribution network is generally a multi-objective optimization *** maximum benefits of DG injection in the distribution system highly depend on the selection of an appropriate number of DGs and their capacity along with the best *** this paper,the improved decomposition based evolutionary algorithm(I-DBEA)is used for the selection of optimal number,capacity and site of DG in order to minimize real power losses and voltage deviation,and to maximize the voltage stability *** proposed I-DBEA technique has the ability to incorporate non-linear,nonconvex and mixed-integer variable problems and it is independent of local extrema *** order to validate the effectiveness of the proposed technique,IEEE 33-bus,69-bus,and 119-bus standard radial distribution networks are ***,the choice of optimal number of DGs in the distribution system is also *** simulation results of the proposed method are compared with the existing *** comparison shows that the proposed method has the ability to get the multi-objective optimization of different conflicting objective functions with global optimal values along with the smallest size of DG.

关键词： Distribution system distributed generation multi-objective optimization active power loss improved decomposition based evolutionary algorithm(I-DBEA)

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Estimation of the Shale Oil/Gas Potential of a Paleocene–Eocene Succession: A Case Study from the Meyal Area, Potwar Basin, Pakistan

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Acta Geologica Sinica(English Edition) 2017年第6期91卷 2180-2199页

作者： ali aamir Ullah MATEE Hussain MATLOOB Asher Samuel BHATTI Rehman KHAISTA Department of Earth Sciences Quaid-i-Azam University Bacha Khan University National Centre of Excellence in Geology University of Peshawar

The successful exploration and production of shale-gas resources in the United States and Canada sets a new possible solution towards the energy crisis presently affecting most countries of Asia. This study focuses on the use of well log and 2D seismic data for the characterization of the shale oil/gas potential of a Paleocene-Eocene succession -- the Meyal area in the Potwar Basin of Pakistan. Two shaly plays are identified in Paleocene-Eocene strata in well logs using ALogR and modified ALogR cross-plot techniques. The results indicate that Paleocene shale （the Patala Formation） and the lower shaly part of Eocene limestone （Sakesar Formation） can be potentially mature source rocks. However, the thermal maturity modelling proves that only the Paleocene shale is mature. Our results also suggest that the maturity responses on ALogR models for the lower shaly part of the Eocene limestone are due to trapped hydrocarbons in the intra-formational fractures. Petroelastic/petrophysical analysis of the Patala Formation reveals two potential shale oil/gas zones on the basis of Young＇s modulus, Poisson＇s ratio, Brittleness index and Total Organic Content at an exploitation depth of 3980-3988 m. This work can provide valuable insight for estimating shale oil/gas potential in highly deformed basins not only in Asia but in other parts of the world.

关键词： petroleum geology ALogR pseudo-sonic curve total organic carbon (TOC) burial history,thermal maturity

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Impact of Synchronous Condenser on the Dynamic Behavior of LCC-based UHVDC System Hierarchically Connected to AC System

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CSEE Journal of Power and Energy Systems 2019年第2期5卷 190-198页

作者： ali aamir Li Qiao Chunyi Guo Atiq Ur Rehman Zhizhong Yang State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijing 102206China Global Energy Interconnection Research Institute Co.Ltd Beijing 102209China

Hierarchical connection(HC)is a very attractive mode for±800 kV line commutated converter based ultra high voltage direct current(LCC-UHVDC)system connected to different AC voltage levels because of its ability to reduce the scale factor of a converter *** in the HC-UHVDC system can cause commutation failure(CF).In this paper,impact of synchronous condenser(SC)to mitigate CF in HC-UHVDC system is analyzed.A±800KV HC-UHVDC system along with synchronous condenser is built in PSCAD/*** performance analysis of HC-UHVDC for single and three phase to ground faults is *** failure immunity index(CFII),commutation failure probability index(CFPI),fault recovery time(FRT),and transient overvoltage(TOV)are used as measures to evaluate the effects of SC at HC-UHVDC system *** simulation results show that SC can make the HCUHVDC system less susceptible to CF,effectively improve fault recovery performances of the overall system,and reduce transient overvoltage when single or multiple converters are *** results of this research can provide technical assistance in real world HC-UHVDC projects.

关键词： Commutation failure hierarchical connection synchronous condenser transient overvoltage ultra-high voltage direct current

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Paraneoplastic syndromes in cholangiocarcinoma

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World Journal of Hepatology 2020年第11期12卷 897-907页

作者： Saad Ur Rahman Muhammad Khawar Sana Zabreen Tahir aamir ali Pir Ahmad Shah Department of Medicine King Edward Medical UniversityLahore 54000PunjabPakistan Department of Neurology Brigham and Women’s HospitalBostonMA 02115United States Department of Radiology Beth Israel Deaconess Medical CenterBostonMA 02215United States Department of Medicine University of Texas Health Science CenterSan AntonioTX 78229United States

Paraneoplastic syndromes are the symptoms or signs which result from damage to tissues that are distant from the site of malignancy,due to complex interactions between the body’s immune system and malignant ***(CCA)is an aggressive epithelial malignancy of hepatobiliary tree and it is found to be associated with various paraneoplastic *** syndromes can present as dermatological,neurological,renal,hematological,or multi-systemic *** suspicion and timely recognition of these syndromes can lead to early diagnosis of covert malignancies like *** management plan remains the removal of the underlying cause which in this case is CCA.

关键词： Cholangiocarcinoma Paraneoplastic syndrome Malignancy Immune system Biliary tree Multi-organ

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同步调相机对基于LCC的特高压直流输电分层接入系统动态特性的影响研究

同步调相机对基于LCC的特高压直流输电分层接入系统动态特性的影...

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作者： ali aamir(阿米尔阿里) 华北电力大学(北京)

学位级别：硕士

分层接入特高压直流输电系统的逆变侧接入不同的电压等级来降低换流变压器的变比,对于±800kV等级的特高压LCC-HVDC是一种非常有吸引力的接入模式。随着特高压交流输电工程和特高压直流输电工程的大规模建设及广泛应用,中国的负荷中心... 详细信息

分层接入特高压直流输电系统的逆变侧接入不同的电压等级来降低换流变压器的变比,对于±800kV等级的特高压LCC-HVDC是一种非常有吸引力的接入模式。随着特高压交流输电工程和特高压直流输电工程的大规模建设及广泛应用,中国的负荷中心区域形成了多馈入直流输电系统,并将逐步成为中国电网发展的突出问题之一。为了克服多馈入直流输电系统相关的技术难题,分层接入特高压直流输电系统作为一种基本接入方式在中国得到了应用。分层接入特高压直流输电系统具有一系列的优点:1)可以增加受端交流系统的电压支撑能力;2)利用特定的控制方法可以有效解决输送功率的分配问题;3)可以利用已有设备来降低工程投资等。逆变侧交流系统故障可能会导致分层接入特高压直流输电系统发生换相失败,因此论文针对同步调相机对分层接入特高压直流输电系统暂态特性的影响展开研究。为了上述研究目标,在PSCAD/EMTDC仿真软件中搭建了含有同步调相机的±800kV分层接入特高压直流输电系统模型。论文研究了单相和三相接地故障下分层接入特高压直流输电系统的暂态特性,利用换相失败免疫性指标、换相失败概率指标、故障恢复时间和暂态过电压等作为评价指标分析了同步调相机对分层接入特高压直流输电系统的影响。仿真结果表明:1)同步调相机可以有效提高分层接入特高压直流输电系统的换相失败抵御能力;2)可以有效改善分层接入特高压直流输电系统的故障恢复性能;3)可以有效降低单组或多组换流器闭锁时的暂态过电压水平。研究结果可以为分层接入特高压直流输电工程提供一定的技术参考。

关键词：分层接入特高压直流输电同步调相机换相失败暂时过电压

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