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STF系统的复杂奇异性及核反应堆的数学应用

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STF系统的复杂奇异性及核反应堆的数学应用

作者： shahab ud-din khan 重庆大学

学位级别：硕士

本研究主要包括用逼近方法构造多种合理的快速发电机模型，并用数值模拟进行检验。拉伸扭曲流（STF）是一个具有二次非线性项的常微分方程的三维系统。该数学统统与航空航天工程有关，其应用在人造卫星燃料箱。由于该系统中有复奇异点... 详细信息

本研究主要包括用逼近方法构造多种合理的快速发电机模型，并用数值模拟进行检验。拉伸扭曲流（STF）是一个具有二次非线性项的常微分方程的三维系统。该数学统统与航空航天工程有关，其应用在人造卫星燃料箱。由于该系统中有复奇异点，所以可资利用的文献有限。发电机理论的一个自然的出发点是假设流体运动是在一个给定的向量场中，而不考虑驱动力的原因。最近几年，人们认识到一个小扩散的奇异限制，大的磁雷诺数是很多这类问题的可行选择。一些大问题是，发电机能运转多快？该系统的稳定状态和不稳定状态是什么样的？有安全措施保护系统吗？有可能做出一个具有相同特性的新系统吗？模拟该系统最好的数学模型和方法是什么？在该研究中，我们已经成功地解决了这些问题。在这篇论文中，把改进了的Adomian分解法（ADM）以及第五阶Runge-Kutta方法（RK5）运用到了STF系统。为解决系统的混沌和非混沌行为，我们开发了一个计算机Matlab程序。这依赖于Lyapunov指数是否为正。牛顿方法用来表现最好的收敛。进而，我们研究了一个外力作用在STF系统，有理论上详细细分析了的控制参数的行为。该研究同时还通过用专门的核反应堆程序分析了核反应堆分解的数学建模。在该项工作中，我们为核反应堆代码的热水力分析建立了一个数学模型。这个改进了的核反应堆代码被应用到核反应的热分析中，这在确定反应堆的设计方面至关重要。同时它也能在不超过核心组件的限制情况下产生预期的暖气流，超过限制可能会导致燃料使用故障和环境核辐射。THEATRe程序只能在圆柱形燃料反应堆里起作用，在板式核反应堆中不起作用。因此，我们将THEATRe程序修改得适合板式反应元件，并用于我们的研究中。修改后的程序所得到的结果与其他程序得到的模拟结果在精确性方面吻合的很好。

关键词：拉伸扭曲流 Lyapunov函数摄动法第五阶Runge-Kutta方法分步法

Carotenoids as a nutraceutical and health-promoting dietary supplement for human and animals:an updated review

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Traditional Medicine Research 2025年第3期10卷 8-20页

作者： Mahrukh Babar Jameel Ahmed Buzdar Azka Zaheer Nizam-ud-din Ghulam Mustafa Bilal Ahmed khan Maryam Hanif Tayyaba Asghar Abdul Qadeer Institute of Physiology and Pharmacology University of Agriculture FaisalabadFaisalabad 38000Pakistan Department of Pharmacy Abasyn UniversityIslamabad 46000Pakistan Livestock and Dairy Development Department Government of BalochistanQuetta 87650Pakistan Department of Epidemiology and Public Health University of Agriculture FaisalabadFaisalabad 38000Pakistan Department of Pharmacology and Toxicology University of Veterinary and Animal SciencesLahore 54000Pakistan Department of Cell Biology School of Life SciencesCentral South UniversityChangsha 410013China

Carotenoids are naturally occurring pigments found in various fruits,vegetables,algae,insects,fungi,*** nutritional supplements,carotenoids have gained considerable attention for their potential therapeutic and health-promoting effects,making them significant components of alternative and traditional medicine *** have many health benefits,particularly disease *** such as lutein,lycopene,and beta-carotene possess strong antioxidant properties,which help mitigate oxidative stress and reduce the risk of chronic diseases,including cancer,cardiovascular diseases,and eye *** play a vital role in various health conditions,including coronavirus disease-19(COVID-19),vision disorders,Alzheimer’s disease,reproductive health,cosmetic applications,diabetes management,infant formula,and animal *** alternative medicine,carotenoids are valued for enhancing immune function,reducing oxidative damage,and lowering the risk of chronic *** benefits extend to improving cognitive function and potentially delaying the progression of Alzheimer’s disease,protecting against age-related macular degeneration and other vision problems,and supporting COVID-19 *** skin care,carotenoids contribute to skin health and beauty,while in diabetes management,they aid in blood glucose *** review especially emphasizes the potential of carotenoids as vital components in health management strategies within alternative medicine and underscores the need for further research to optimize their use in nutraceutical applications.

关键词： carotenoids therapeutic effect COVID Alzheimer’s oxidative stress

Applicability of deep neural networks for lithofacies classification from conventional well logs: An integrated approach

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Petroleum Research 2024年第3期9卷 393-408页

作者： Saud Qadir khan Farzain ud din Kirmani Mari Petroleum Company Limited IslamabadPakistan Department of Petroleum and Gas Enginering NFC.Institute of Engineering&Technology MultanPakistan

Parametric understanding for specifying formation characteristics can be perceived through conven-tional ***,attributes of reservoir lithology are practiced for hydrocarbon *** logging is conventional approach which is applicable to predict lithology efficiently as compared to geophysical modeling and petrophysical analysis due to cost effectiveness and suitable interpretation ***,manual interpretation of lithology identification through well logging data requires domain expertise with an extended length of time for ***,in this study,Deep Neural Network(DNN)has been deployed to automate the lithology identification process from well logging data which would provide support by increasing time-effective for monitoring *** model has been developed for predicting formation lithology leading to the optimization of the model through the thorough evaluation of the best parameters and hyperparameters including the number of neurons,number of layers,optimizer,learning rate,dropout values,and activation *** of the model is examined by utilizing different evaluation metrics through the division of the dataset into the subdomains of training,validation and ***,an attempt is contributed to remove interception for formation lithology prediction while addressing the imbalanced nature of the associated dataset as well in the training process using class *** is assessed that accuracy is not a true and only reliable metric to evaluate the lithology classification *** model with class weight recognizes all the classes but has low accuracy as well as a low F1-score while LSTM based model has high accuracyas well as a high F1-score.

关键词： Lithology identification Deep learning LSTM Imbalanced dataset Conventional well logs

Energy-Efficient Scheduling Based on Task Migration Policy Using DPM for Homogeneous MPSoCs

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Computers, Materials & Continua 2023年第1期74卷 965-981页

作者： Hamayun khan Irfan ud din Arshad Ali Sami Alshmrany Department of Electrical Engineering Faculty of Engineering&Technology Superior University Lahore54000Pakistan Department of Computer Science Faculty of Computer Science&IT Superior University Lahore54000Pakistan Faculty of Computer and Information Systems Islamic University of MadinahAl Madinah Al Munawarah42351Saudi Arabia

Increasing the life span and efficiency of Multiprocessor System on Chip(MPSoC)by reducing power and energy utilization has become a critical chip design challenge for multiprocessor *** the advancement of technology,the performance management of central processing unit(CPU)is *** densities and thermal effects are quickly increasing in multi-core embedded technologies due to shrinking of chip *** energy consumption reaches a threshold that creates a delay in complementary metal oxide semiconductor(CMOS)circuits and reduces the speed by 10%–15%because excessive on-chip temperature shortens the chip’s life *** this paper,we address the scheduling&energy utilization problem by introducing and evaluating an optimal energy-aware earliest deadline first scheduling(EA-EDF)based technique formultiprocessor environments with task migration that enhances the performance and efficiency in multiprocessor systemon-chip while lowering energy and power *** selection of core andmigration of tasks prevents the system from reaching itsmaximumenergy utilization while effectively using the dynamic power management(DPM)*** in the execution of tasks the temperature and utilization factor(u_(i))on-chip increases that dissipate more *** proposed approach migrates such tasks to the core that produces less heat and consumes less power by distributing the load on other cores to lower the temperature and optimizes the duration of idle and sleep times across multiple *** performance of the EA-EDF algorithm was evaluated by an extensive set of experiments,where excellent results were reported when compared to other current techniques,the efficacy of the proposed methodology reduces the power and energy consumption by 4.3%–4.7%on a utilization of 6%,36%&46%at 520&624 MHz operating frequency when particularly in comparison to other energy-aware methods for *** are running and accurately scheduled to make an energy-efficient

关键词： Dynamic power management dynamic voltage&frequency scaling dynamic thermal management multiprocessor system on chip complementary metal oxide semiconductor reliability

A one-step implicit iterative method for two finite families of asymptotically nonexpansive mappings in a hyperbolic space

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Applied Mathematics(A Journal of Chinese Universities) 2018年第3期33卷 274-286页

作者： Hafiz Fukhar-ud-din Amna Kalsoom Safeer H khan Department of Mathematics and Statistics King Fahd University of Petroleum and Minerals Department of Mathematics and Statistics International Islamic University Department of Mathematics Statistics and Physics Qatar University

We introduce a one-step implicit iterative method for two finite families of asymptotically nonexpansive mappings in a hyperbolic space and use it to approximate common fixed points of these families. The results presented in this paper are new in the setting of hyperbolic spaces. On top, these are generalizations of several results in literature from Banach spaces to hyperbolic spaces. At the end of the paper, we give an example to validate our results.

关键词： uniformly convex hyperbolic space asymptotically nonexpansive mapping common fixed point strong convergence

An Optimal DPM Based Energy-Aware Task Scheduling for Performance Enhancement in Embedded MPSoC

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Computers, Materials & Continua 2023年第1期74卷 2097-2113页

作者： Hamayun khan Irfan ud din Arshad Ali Mohammad Husain Department of Electrical Engineering Faculty of Engineering&Technology Superior University Lahore54000Pakistan Department of Computer Science Faculty of Computer Science&IT Superior University Lahore54000Pakistan Faculty of Computer and Information Systems Islamic University of MadinahAl Madinah Al Munawarah42351Saudi Arabia

Minimizing the energy consumption to increase the life span and performance of multiprocessor system on chip(MPSoC)has become an integral chip design issue for multiprocessor *** performance measurement of computational systems is changing with the advancement in *** to shrinking and smaller chip size power densities onchip are increasing rapidly that increasing chip temperature in multi-core embedded *** operating speed of the device decreases when power consumption reaches a threshold that causes a delay in complementary metal oxide semiconductor(CMOS)circuits because high on-chip temperature adversely affects the life span of the *** this paper an energy-aware dynamic power management technique based on energy aware earliest deadline first(EA-EDF)scheduling is proposed for improving the performance and reliability by reducing energy and power consumption in the system on chip(SOC).Dynamic power management(DPM)enables MPSOC to reduce power and energy consumption by adopting a suitable core configuration for task *** migration avoids peak temperature values in the multicore *** utilization factor(ui)on central processing unit(CPU)core consumes more energy and increases the temperature *** technique switches the core bymigrating such task to a core that has less temperature and is in a low power *** proposed EA-EDF scheduling technique migrates load on different cores to attain stability in temperature among multiple cores of the CPU and optimized the duration of the idle and sleep periods to enable the low-temperature *** effectiveness of the EA-EDF approach reduces the utilization and energy consumption compared to other existing methods and *** simulation results show the improvement in performance by optimizing 4.8%on u_(i) 9%,16%,23%and 25%at 520 MHz operating frequency as compared to other energy-aware techniques for MPSoCs when the least number of tasks is in running state and can

关键词： Dynamic power management dynamic voltage&frequency scaling dynamic thermal management multiprocessor system on chip complementary metal oxide semiconductor reliability

Response of Wheat to Tillage Plus Rice Residue and Nitrogen Management in Rice-Wheat System

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Journal of Integrative Agriculture 2014年第11期13卷 2389-2398页

作者： Khalid Usman Ejaz Ahmad khan Niamatullah khan Abdur Rashid Fazal Yazdan Saleem ud din Department of Agronomy Faculty of Agriculture Gomal UniversityD. I. Khan 29050 Pakistan Cotton Research Station Ratta KulachiD. I. Khan 29050 Pakistan Arid Zone Research Institute Ratta KulachiD. I. Khan 29050 Pakistan Oil Seed Research Program National Agricultural Research CentreIslamabad 44000Pakistan

Zero tillage with residues retention and optimizing nitrogen fertilization are important strategies to improve soil quality and wheat （Triticum aestivum L.） yield in rice （Oryza sativa L.）-wheat system. Field experiments were conducted on silty clay soil （Hyperthermic, and Typic Torrilfuvents） in D. I. khan, Pakistan, to explore the impact of six tillage methods （zero tillage straw retained （ZTsr）, ZT straw burnt （ZTsb）, reduced tillage straw incorporated （RTsi, including tiller and rotavator）, RT straw burnt （RTsb）, conventional tillage straw incorporated （CTsi, including disc plow, tiller, rotavator, and leveling operations）, CT straw burnt （CTsb）） and ifve nitrogen rates, i.e., 0, 100, 150, 200, and 250 kg ha-1 on wheat yield. Mean values for N revealed that spikes m-2, grains/spike, 1 000-grain weight （g）, and grain yield （kg ha-1） were signiifcantly higher at 200 kg N ha-1 in both the years as well as mean over years than all other treatments. Mean values for tillage revealed that ZTsr produced highest number of spikes m-2 among tillage methods. However, grains/spike, 1 000-grain weight, and grain yield were higher in tillage methods with either straw retained/incorporated than tillage methods with straw burnt. Interaction effects were signiifcant in year 1 and in mean over years regarding spikes m-2, 1 000-grain weight, total soil organic matter （SOM）, and total soil N （TSN）. ZTsr produced the most spikes m-2 and 1 000-grain weight at 200 kg N ha-1. ZTsr also produced higher SOM and TSN at 200-250 kg N ha-1 at the end of 2 yr cropping. Thus ZTsr with 200 kg N ha-1 may be an optimum and sustainable approach to enhance wheat yield and soil quality in rice-wheat system.

关键词： wheat yield tillage nitrogen TSN SOM

Short Response of Spring Wheat to Tillage, Residue Management and Split Nitrogen Application in a Rice-Wheat System

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Journal of Integrative Agriculture 2014年第12期13卷 2625-2633页

作者： Khalid Usman Ejaz Ahmad khan Fazal Yazdan Niamatullah khan Abdur Rashid Saleem ud din Department of Agronomy Faculty of Agriculture Gomal UniversityD. I. Khan 29050 Pakistan Oil Seed Research Programme National Agricultural Research Center (NARC) Cotton Research Station Ratta Kulachi D. I. Khan 29050 Pakistan Arid Zone Research Institute Ratta Kulachi D. I. Khan 29050 Pakistan

A ifeld experiment was conducted to study the impact of tillage, crop residue management and nitrogen （N） splitting on spring wheat （Triticum aestivum L.） yield over 2 yr （2010-2012） in a rice （Oryza sativa L.）-wheat system in northwestern Pakistan. The experiment was conducted as split plot arranged in randomized complete blocks design with three replications. Treatments comprised six tillage and residue managements：zero tillage straw retained （ZTsr）, zero tillage straw burnt （ZTsb）, reduced tillage straw incorporated （RTsi）, reduced tillage straw burnt （RTsb）, conventional tillage straw incorporated （CTsi）, and conventional tillage straw burnt （CTsb） as main plots and N （200 kg ha-1） was applied as split form viz., control （no nitrogen＆no splitting, N0S0）;2 splits of total N, half at sowing and half at the 1st irrigation （i.e., 20 d after sowing （DAS））（NS1）;3 splits of total N, 1/3 at sowing, 1/3 at the 1st irrigation, and 1/3 at the 2nd irrigation （NS2）;4 splits of total N, 1/4 at sowing, 1/4 at the 1st irrigation, 1/4 at the 2nd irrigation （45 DAS）, and 1/4 at the 3rd irrigation （70 DAS）（NS3）;and 4 splits of total N, 1/4 at the 1st irrigation, 1/4 at the 2nd irrigation, 1/4 at the 3rd irrigation, and 1/4 at the 4th irrigation （95DAS）（NS4） as sub plots. The results showed that the most pikes m-2, grains/spike, 1 000-grain weight, grain yield, and N use efifciency （NUE） were obtained at zero tillage, straw retained and 4 splits application of total N （i.e., at sowing 20, 45 and 70 d after sowing）. The results indicated that ZTsr with application of 200 kg N ha-1 in 4 equal splits viz. at sowing 20, 45 and 70 d after sowing is an appropriate strategy that enhanced wheat yield （7 436-7 634 kg ha-1） and N efifciency （28.6-29.5 kg kg-1） in rice-wheat system.

关键词： tillage residue management N split application wheat yield

Impact of light intensity on flowering time and plant quality of Antirrhinum majus L. cultivar Chimes White

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Journal of Zhejiang University Science 2004年第4期5卷 400-405页

作者： MUNIRMuhammad JAMILMuhammad BALOCHJalal-ud-din KHATTAKKhalidRehman FacultyofAgriculture GomalUniversityD.I.KhanPakistan

Shades of different light intensities (29%, 43%, 54%,60% or 68%) along with control (no shade) were studied to observe their effects on the flowering time and plant quality. A hyperbolic relationship was observed between different light intensities under shade,and time to *** total number of flower buds showed a curvilinear relationship with light intensities. Growth parameters related to the plant characteristics such as plant height,leaf area and plant fresh weight were improved under shading treatments at the expense of flowering time and number of flower ***,both linear and polynomial models applied assumed that cultivar Chimes White was equally sensitive to light intensity throughout development.

关键词： Antirrhinum majus L. Snapdragon Growth and development Flowering Light intensity.