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Structural Comparison and Drug Screening of Spike Proteins of Ten SARS-CoV-2 Variants

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Research 2022年第2期2022卷 5-24页

作者： Qiangzhen Yang Xuemin Jian ali Alamdar Shah syed Aamir Fahira Chenxiang Zheng zijia Zhu Ke Wang Jinmai Zhang Yangin Wen Zhiqiang Li Dun Pan Tingting Lu Zhuo Wang Yongyong Shi Bio-X Institutes Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders(Ministryof Education)Shanghai jiao Tong University1954 Huashan RoadShanghai 200030China Biomedical Sciences Insttuteof Qingdao University(Qingdao Branch of SJTU Bio-X Institutes) Qingdao University Qingdao 266003China Shanghai Key Laboratory of Psychotic Disorders Shanghai Mental Health CenterShanghai Jiao Tong University School of MedicineShanghai 200030China Shanghai Key Laboratory of Sleep Disordered Breathing Shanghai liao Tong University Afliated Sixth People's Hospital.ShanghaiChina The First Afiliated Hospital of Zhengzhou Universily Zhengzhou 450052China Deparment of Psychiary First Teaching Hospital of Xinjiang Medical UniversitUrumqi 830046China

SARS-CoV-2(severe acute respiratory syndrome coronavirus 2)has evolved many variants with stronger infectivity and immune evasion than the original strain,including Alpha,Beta,Gamma,Delta,Epsilon,Kappa,lota,Lambda,and 21H *** acid mutations are enriched in the spike protein of SARS *** plays a crucial role in cell ***,the impact of these mutations on protein structure and function is *** the pathophysiology and pandemic feaures of these SARS-CoV-2 variants requires knowledge of the spike protein ***,we obtained the spike protein structures of 10 main globally endemic SARS CoV-2 strains using *** clustering analysis based on structural similarity revealed the unique features of the mainly pandemic SARS CoV-2 Delta *** that structural clusters can reflect the current characteristics of the epidemic more accurately than those based on the protein *** analysis of the binding afinities of ACE2-RBD,antibody-NTD,and antibody-RBD complexes in the different variants revealed that the recognition of antibodies against SI NTD and RBD was decreased in the variants,especally the Delta variant compared with the original strain,which may induce the immune evasion of SARS-CoV-2 ***,by virtual screening the ZINC database against a high-accuracy predicted structure of Delta spike protein and experimental validation,we identified multiple compounds that target S1 NTD and RBD,which might contribute towards the development of clinical anti-SARS-CoV-2 *** findings provided a basic foundation for future in vitro and in vivo investigations that might speed up the development of potential therapies for the SARS-CoV-2 va riants.

关键词： globally similarity finding

CONTROL OF VEHICLE PLATOONS FOR HIGHWAY SAFETY AND EFFICIENT UTILITY:CONSENSUS WITH COMMUNICATIONS AND VEHICLE DYNAMICS

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Journal of Systems Science & Complexity 2014年第4期27卷 605-631页

作者： WANG Le Yi syed ali YIN Gang George PANDYA Abhilash ZHANG Hongwei Department of Electrical and Computer Engineering Wayne State University Department of Mathematics Wayne State University Department of Computer Science Wayne State University

Platoon formation of highway vehicles is a critical foundation for autonomous or semiautonomous vehicle control for enhanced safety,improved highway utility,increased fuel economy,and reduced emission toward intelligent transportation *** control encounters great challenges from vehicle control,communications,team coordination,and *** paper introduces a new method for coordinated control of platoons by using integrated network consensus decisions and vehicle *** achieve suitable coordination of the team vehicles based on terrain and environmental conditions,the emerging technology of network consensus control is modified to a weighted and constrained consensus-seeking *** are introduced and their convergence properties are *** methodology employs neighborhood information through on-board sensors and V2 V or V2 I communications,but achieves global coordination of the entire *** ability of the methods in terms of robustness,disturbance rejection,noise attenuation,and cyber-physical interaction is analyzed and demonstrated with simulated case studies.

关键词：车辆控制公路车辆实用工具公路安全通信智能交通系统综合网络燃油经济性

A novel (G'/G)-expansion method and its application to the Boussinesq equation

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Chinese Physics B 2014年第2期23卷 34-43页

作者： Md.Nur Alam Md.ali Akbar syed Tauseef Mohyud-Din Department of Mathematics Pabna University of Science and Technology Department of Applied Mathematics University of Rajshahi Department of Mathematics HITEC UniversityTaxila Cantt

In this article, a novel （G＇/G）-expansion method is proposed to search for the traveling wave solutions of nonlinear evolution equations. We construct abundant traveling wave solutions involving parameters to the Boussinesq equation by means of the suggested method. The performance of the method is reliable and useful, and gives more general exact solutions than the existing methods. The new （G＇/G）-expansion method provides not only more general forms of solutions but also cuspon, peakon, soliton, and periodic waves.

关键词： (G'/G)-expansion method Boussinesq equation solitary wave solutions auxiliary nonlinear ordinary differential equation

A novel antimicrobial flavonoidic glycoside from the leaves of Alstonia macrophylla Wall ex ***(Apocynaceae)

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Chinese Chemical Letters 2010年第5期21卷 593-595页

作者： Mehtab Parveen Zakia Khanam Akhtar ali syed Mohmud Ahmad Department of Chemistry Aligarh Muslim UniversityAligarhU.P.202002India

A new flavonoidic glycoside,tricin-4’-O-β-L-arabinoside(1) was isolated from the leaves of Alstonia macrophylla along with two known flavonoids,vitexin and myricetin-3′-*** structures were established by chemical and spectral *** known compounds were reported for the first time from this *** compound 1 was tested for antifungal and antibacterial activities.

关键词： Alstonia macrophylla Vitexin Myricetin-3’-rhamnoside-3-O-galactoside Tricin-4′-O-β-L-arabinoside Antibacterial Antifungal activity

SYNCHRONIZATION OF MASTER-SLAVE MARKOVIAN SWITCHING COMPLEX DYNAMICAL NETWORKS WITH TIME-VARYING DELAYS IN NONLINEAR FUNCTION VIA SLIDING MODE CONTROL

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Acta Mathematica Scientia 2017年第2期37卷 368-384页

作者： M.syed ali J.YOGAMBIGAI 曹进德 Department of Mathematics Thiruvalluvar UniversityVellore 632115Tamil NaduIndia Department of Mathematics Southeast UniversityNanjing 210096China Department of Mathematics Faculty of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia

In this article, a synchronization problem for master-slave Markovian switching complex dynamical networks with time-varying delays in nonlinear function via sliding mode control is investigated. On the basis of the appropriate Lyapunov-Krasovskii functional, introducing some free weighting matrices, new synchronization criteria are derived in terms of linear matrix inequalities （LMIs）. Then, an integral sliding surface is designed to guarantee synchronization of master-slave Markovian switching complex dynamical networks, and the suitable controller is synthesized to ensure that the trajectory of the closed-loop error system can be driven onto the prescribed sliding mode surface. By using Dynkin＇s formula, we established the stochastic stablity of master-slave system. Finally, numerical example is provided to demonstrate the effectiveness of the obtained theoretical results.

关键词： Markovian switching complex dynamical networks Lyapunov-Krasovskii method sliding mode control Linear Matrix Inequality

Preconcentration and Determination of Chromium Species Using Octadecyl Silica Membrane Disks and Flame Atomic Absorption Spectrometry

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Chinese Journal of Chemistry 2007年第12期25卷 1859-1865页

作者： MOGHIMI, ali SABER-TEHRANI, Mohammad WAQIF-HUSAIN, syed MOHAMMADHOSSEINI, Majid Department of Chemistry Islamic Azad University Varamin Campus Varamin Iran Department of Chem stry Faculty of Scence Scence and Research Campus lslamic Azad Universty Tehran Iran Department of Chemistry Islamic Azad University of Shahrood Shahrood Iran

A novel and selective method for the fast determination of trace amounts of chromium species in water samples has been developed. The procedure is based on the selective formation of chromium diethyldithiocarbamate complexes at different pH in the presence of Mn（Ⅱ） as an enhancement agent of chromium signals followed by elution with organic eluents and determination by atomic flame absorption spectrometry. The maximum capacity of the employed disks was found to be （396±3） pg and （376±2） pg for Cr（Ⅲ） and Cr（Ⅵ）, respectively. The detection limit of the proposed method is 49 and 43 ng·L^-1 for Cr（Ⅲ） and Cr（Ⅵ）, respectively. The proposed method was successfully applied for determination of chromium species Cr（Ⅲ） and Cr（Ⅵ） in different water samples.

关键词： solid phase extraction sodium diethyldithiocarbamate flame atomic absorption spectrometry octadecyl silica membrane disk

FINITE-TIME H∞ CONTROL FOR A CLASS OF MARKOVIAN JUMPING NEURAL NETWORKS WITH DISTRIBUTED TIME VARYING DELAYS-LMI APPROACH

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Acta Mathematica Scientia 2018年第2期38卷 561-579页

作者： p.baskar s.padmanabhan m.syed ali New Horizon College of Engineering Marathhalli Bangalore 560103 India RNS Institute of Technology Channasandra Bangalore 560098 India Department of Mathematics Thiruvalluvar University Vellore Tamilnadu 632115 India

In this article, we investigates finite-time H∞ control problem of Markovian jumping neural networks of neutral type with distributed time varying delays. The mathematical model of the Markovian jumping neural networks with distributed delays is established in which a set of neural networks are used as individual subsystems. Finite time stability analysis for such neural networks is addressed based on the linear matrix inequality approach. Numerical examples are given to illustrate the usefulness of our proposed method. The results obtained are compared with the results in the literature to show the conservativeness.

关键词： Finite-time H∞ control, Markovian jumping neural networks Lyapunov stability

Intelligent Islanding Detection of Multi-distributed Generation Using Artificial Neural Network Based on Intrinsic Mode Function Feature

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Journal of Modern Power Systems and Clean Energy 2020年第3期8卷 511-520页

作者： Samuel Admasie syed Basit ali Bukhari Teke Gush Raza Haider Chul Hwan Kim Department of Electrical and Computer Engineering Sungkyunkwan UniversitySuwonSouth Korea U.S.-Pakistan Center for Advanced Studies in Energy(USPCAS-E) National University of Sciences and Technology(NUST)H-12 IslamabadPakistan Department of Electrical Engineering Balochistan University of Engineering and TechnologyKhuzdar 89100Pakistan

The integration of distributed energy resources(DERs) into distribution networks is becoming increasingly important, as it supports the continued adoption of renewable power generation, combined heat and power plants, and storage systems. Nevertheless, inadvertent islanding operation is one of the major protection issues in distribution networks connected to DERs. This study proposes an intelligent islanding detection method(IIDM) using an intrinsic mode function(IMF)feature-based grey wolf optimized artificial neural network(GWO-ANN). In the proposed IIDM, the modal voltage signal is pre-processed by variational mode decomposition followed by Hilbert transform on each IMF to derive highly involved features. Then, the energy and standard deviation of IMFs are employed to train/test the GWO-ANN model for identifying the islanding operations from other non-islanding events. To evaluate the performance of the proposed IIDM, various islanding and non-islanding conditions such as faults, voltage sag, linear and nonlinear load and switching, are considered as the training and testing datasets. Moreover, the proposed IIDM is evaluated under noise conditions for the measured voltage signal. The simulation results demonstrate that the proposed IIDM is capable of differentiating between islanding and non-islanding events without any sensitivity under noise conditions in the test signal.

关键词： Distributed energy resource(DER) intrinsic mode function(IMF) grey wolf optimized artificial neural network(GWO-ANN) intelligent islanding detection method(IIDM) microgrid

On biological population model of fractional order

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International Journal of Biomathematics 2016年第5期9卷 107-119页

作者： syed Tauseef Mohyud-Din Ayyaz ali Bandar Bin-Mohsin Department of Mathematics HITEC University Taxila Pakistan Department of Mathematics College of Sciences King Saud University Riyadh Saudi Arabia

In this paper, we extensively studied a mathematical model of biology. It helps us to understand the dynamical procedure of population changes in biological population model and provides valuable predictions. In this model, we establish a variety of exact solutions. To study the exact solutions, we used a fractional complex transform to convert the particular partial differential equation of fractional order into corresponding partial differential equation and modified exp-function method is implemented to investigate the nonlinear equation. Graphical demonstrations along with the numerical data reinforce the efficacy of the used procedure. The specified idea is very effective, unfailing, well-organized and pragmatic for fractional PDEs and could be protracted to further physical happenings.

关键词：生物种群模型分数阶偏微分方程非线性方程数学模型人口变化图形演示 PDEs