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Conservation laws,Lie symmetries,self adjointness,and soliton solutions for the Selkov–Schnakenberg system

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Communications in Theoretical Physics 2024年第2期76卷 29-44页

作者： Kashif ali Aly R Seadawy syed T R rizvi Noor Aziz Department of Mathematics COMSATS University IslamabadLahore CampusPakistan Mathematics Department Faculty of ScienceTaibah UniversityAl-Madinah Al-Munawarah41411Saudi Arabia

In this article,we explore the famous Selkov–Schnakenberg(SS)system of coupled nonlinear partial differential equations(PDEs)for Lie symmetry analysis,self-adjointness,and conservation ***,miscellaneous soliton solutions like dark,bright,periodic,rational,Jacobian elliptic function,Weierstrass elliptic function,and hyperbolic solutions of the SS system will be achieved by a well-known technique called sub-ordinary differential *** these results are displayed graphically by 3D,2D,and contour plots.

关键词： Selkov-Schnakenberg system Lie symmetry analysis conservation laws adjointness integrability

Systematic Review:Load Balancing in Cloud Computing by Using Metaheuristic Based Dynamic Algorithms

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Intelligent Automation & Soft Computing 2024年第3期39卷 437-476页

作者： Darakhshan syed Ghulam Muhammad Safdar rizvi Department of Computer Science Bahria UniversityKarachi CampusKarachiPakistan

Cloud Computing has the ability to provide on-demand access to a shared resource *** has completely changed the way businesses are managed,implement applications,and provide *** rise in popularity has led to a significant increase in the user demand for ***,in cloud environments efficient load balancing is essential to ensure optimal performance and resource *** systematic review targets a detailed description of load balancing techniques including static and dynamic load balancing ***,metaheuristic-based dynamic load balancing algorithms are identified as the optimal solution in case of increased *** a cloud-based context,this paper describes load balancing measurements,including the benefits and drawbacks associated with the selected load balancing *** also summarizes the algorithms based on implementation,time complexity,adaptability,associated issue(s),and targeted QoS ***,the analysis evaluates the tools and instruments utilized in each investigated ***,comparative analysis among static,traditional dynamic and metaheuristic algorithms based on response time by using the CloudSim simulation tool is also ***,the key open problems and potential directions for the state-of-the-art metaheuristic-based approaches are also addressed.

关键词： Cloud computing load balancing metaheuristic algorithm dynamic algorithm load balancer QoS

Chemical constituents and anticoagulant activity from Delphinium brunonianum Royle

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未来食品学报(英文) 2024年第3期4卷 241-247页

作者： Changyang Ma Sitan Chen syed Arif Hussain rizvi Huihui Zhou Wenyi Kang Xuefeng Xi Zhenhua Liu National R&D Center for Edible Fungus Processing Technology Henan UniversityKaifeng 475004China Joint International Research Laboratory of Food&Medicine Resource Function Henan ProvinceKaifeng 475004China Pakistan Agricultural Research Council Islamabad 450000Pakistan College of Physical Education Henan UniversityKaifeng 475004China

Delphinium brunonianum Royle belongs to Ranunculaceae family and has the effects of dispelling wind to relieve itching and cooling blood to *** was found that the extracts of *** had good anticoagulant activity which was extracted with 70%ethanol in our previous ***,16 compounds were isolated and identified from the extract of ***,among which compounds 5,7-10,12,14,15-16 were isolated from this genus for the first time,and compounds 2-4 were isolated from this plant for the first *** the coagulation activity assay showed that compounds 10,14 and 15 had good anticoagulant activity by activated partial thromboplastin time(APTT),thrombin time(TT)and prothrombin time(PT)in vitro.

关键词： Delphinium brunonianum Royle 9-Hydroxy-megastigma-4,7-dien-3-one-9-β-Dglucopyranoside 4-O-α-D-Glucosyl benzoic acid Isolariciresinol 4-O-β-D-glucopyranoside Anticoagulant activity

Development of a Bias Compensating Q-Learning Controller for a Multi-Zone HVAC Facility

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IEEE/CAA Journal of Automatica Sinica 2023年第8期10卷 1704-1715页

作者： syed ali Asad rizvi Amanda J.Pertzborn Zongli Lin IEEE the Department of Electrical and Computer Engineering Tennessee Technological UniversityCookevilleTN 38505 USA the Mechanical Systems and Controls Group in the Building Energy and Environment Division at the National Institute of Standards and Technology(NIST) GaithersburgMD 20899 USA the Charles L.Brown Department of Electrical and Computer Engineering University of VirginiaCharlottesvilleVA 22904-4743 USA

We present the development of a bias compensating reinforcement learning(RL)algorithm that optimizes thermal comfort(by minimizing tracking error)and control utilization(by penalizing setpoint deviations)in a multi-zone heating,ventilation,and air-conditioning(HVAC)lab facility subject to unmeasurable disturbances and unknown *** is shown that the presence of unmeasurable disturbance results in an inconsistent learning equation in traditional RL controllers leading to parameter estimation bias(even with integral action support),and in the extreme case,the divergence of the learning *** demonstrate this issue by applying the popular Q-learning algorithm to linear quadratic regulation(LQR)of a multi-zone HVAC environment and showing that,even with integral support,the algorithm exhibits bias issue during the learning phase when the HVAC disturbance is unmeasurable due to unknown heat gains,occupancy variations,light sources,and outside weather *** address this difficulty,we present a bias compensating learning equation that learns a lumped bias term as a result of disturbances(and possibly other sources)in conjunction with the optimal control *** results show that the proposed scheme not only recovers the bias-free optimal control parameters but it does so without explicitly learning the dynamic model or estimating the disturbances,demonstrating the effectiveness of the algorithm in addressing the above challenges.

关键词： HVAC control optimal tracking Q-learning reinforcement learning(RL)

Approach to pseudomyxoma peritonei

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World Journal of Gastrointestinal Surgery 2018年第5期10卷 49-56页

作者： syed ali rizvi Wajahat syed Ravi Shergill Undergraduate Medicine McMaster University Department of Radiology McMaster University

Pseudomyxoma peritonei(PMP) is a mucinous tumour of the appendix that spreads into the peritoneal cavity in the form of gelatinous deposits. The incidence of PMP is believed to be approximately 1-3 out of a million per year. Nonetheless, due to its indolent nature, it is usually discovered at an advanced stage and severely impacts quality of life. Curative treatment for PMP is complete cytoreductive surgery(CRS) with hyperthermic intraperitoneal chemotherapy(HIPEC). An extensive literature review was conducted searching EMBASE, MEDLINE, Pub Med, and Google Scholar databases for PMP in aims to delineate a clinical approach to diagnosis and treatment. Literature was limited to the years 2007-2018. We found the 5-year overall survival with CRS and HIPEC estimated to be between 23%-82% and rates of major complications as high as 24%. Therefore, it is important to appropriately stage and select patients that should undergo CRS with HIPEC. Modalities like MDCT radiological scores have been shown to have sensitivity and specificity of 94% and 81%, respectively, in being able to predict resectability and survival. Despite treatment, the disease often recurs. Tumor markers have significant potential for establishing prognosis preoperatively, and this paper will review the most recent evidence in support of them.

关键词： Pseudomyxoma peritonei Cytoreductive surgery Hyperthermic intraperitoneal chemotherapy Mucocele Appendix

Interaction properties of solitons for a couple of nonlinear evolution equations

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Chinese Physics B 2021年第1期30卷 185-190页

作者： syed Tahir Raza rizvi Ishrat Bibi Muhammad Younis Ahmet Bekir Department of Mathematics COMSATS University IslamabadLahore CampusPakistan Punjab University College of Information Technology University of the PunjabLahorePakistan Neighbourhood of Akcaglan Imarli Street Number 28/426030EskisehirTurkey

We study one-and two-soliton solutions for the Cahn–Allen(CA) equation and the Brethorton equation. The CA equation has broad spectrum of applications especially in anti-phase boundary motion and it is used in phase-field *** the Brethorton equation is a model for dispersive wave systems, it is used to find the resonant nonlinear interaction among three linear modes. We use the Hirota bilinear method to obtain one-and two-soliton solutions to the CA equation and the Brethorton equation.

关键词： Hirota bilinear method soliton interaction evolution equations

Did green debt instruments aid diversification during the COVID-19 pandemic?

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Financial Innovation 2022年第1期8卷 681-695页

作者： Paresh Kumar Narayan syed Aun R.rizvi ali Sakti Monash University MelbourneAustralia Lahore University of Management Sciences LahorePakistan Bank Indonesia JakartaIndonesia

Faced with a persistent pandemic,investors are concerned about portfolio *** the literature on COVID-19 has evolved impressively,limited work remains on diversification *** contribute to the literature by exploring the volatility and co-movement of different sovereign debt instruments,including green sukuk,sukuk,bond and Islamic and conventional equity indices for *** results consistently point towards increased asset co-movement and weak profitability during the ***,sukuk and green sukuk have a 14%correlation with stocks,suggesting potential diversification prospects in times of extreme shocks.

关键词： COVID-19 Green Sukuk Indonesia Capital market

Parallel photoreactor development with enhanced photon efficiency and reproducibility based on laws of optics

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绿色合成与催化(英文) 2023年第2期4卷 169-172页

作者： rizvi syed Aal E ali Yilin Zhou Kai Gong Xuefeng Jiang Shanghai Key Laboratory of Green Chemistry and Chemical Process School of Chemistry and Molecular EngineeringEast China Normal UniversityShanghai200062China State Key Laboratory of Estuarine and Coastal Research East China Normal UniversityShanghai200062China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

A lab-scale parallel photoreactor model has been developed for broad applications in organic ***,angle,and distance in the reactor are systematically optimized for achieving high reproducibility under the guidance of the Inverse Square Law and Lambert’s Cosine Law,which were first applied in the design of the *** of photon efficiency is realized via 3-point irradiation and broad-band light reflector of *** flux is measured with an optical power meter with its display and adjustment suggested being integrated into the photoreactor for the first time.

关键词： Photochemistry Parallel photo reactor Photo reactor design Photon efficiency Optical laws

Increasing Distance Increasing Bits Substitution (IDIBS) Algorithm for Implementation of VTVB Steganography

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Computer Modeling in Engineering & Sciences 2018年第10期117卷 1-16页

作者： Sahib Khan Arslan Arif syed Tahir Hussain rizvi Nasir Ahmad Department of Electronics and Telecommunications Politecnico di Torino10129 TorinoItaly DAUIN Politecnico di Torino10129 TorinoItaly Department of Electronic and Electrical Engineering Loughborough UniversityUnited Kingdom

Cryptography and steganography are two important and related fields of information ***,steganography is slightly different in the sense that it hides the existence of secret information from unauthorized *** is one of the most appealing research domains,have applications like copyright protection,data integrity protection and manipulation *** steganography techniques have been proposed in ***,in this work a new information hiding algorithm is *** proposed technique de-correlates frequency components of cover image using discrete cosine transform and uses the least significant bits of frequency components for hiding secret *** tech-nique hides variable number of bits of secret message in different frequency ***,it hides different amount of secret information in different regions of cover im-age and results in enhancement of *** algorithm has the flexibility to change the hiding capacity and quality of final stego *** has been observed from experimental results that a hiding a capacity from 3%to 43%can be achieved with significantly good quality of 41 dB to 37 dB in term of peak signal to noise *** successful recovery of the hidden information need the pattern,called stego key,in which is used in hiding *** algorithm provides twofold security;hiding keeps the existence of hidden information secret and the large key size makes the retrieval of hidden information difficult for intruders.

关键词： VTVB steganography image processing information security data hiding