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Estimation of the case fatality rate of COVID-19 epidemiological data in Nigeria using statistical regression analysis

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Biosafety and Health 2021年第1期3卷 4-7页

作者： ahmad Abubakar suleiman Aminu suleiman Usman Aliyu Abdullahi suleiman Abubakar suleiman Department of Statistics Faculty of Computing and Mathematical SciencesKano University of Science and TechnologyWudil 713281Nigeria Department of Hydrology Kano State Ministry of Water ResourcesGidan Murtala 700221Kano StateNigeria

Following the emergence of COVID-19 outbreak,numbers of studies have been conducted to curtail the global spread of the virus by identifying epidemiological changes of the disease through developing statistical models,estimation of the basic reproduction number,displaying the daily reports of confirmed and deaths cases,which are closely related to the present *** and comprehensive estimation method of the epidemiological data is required to understand the actual situation of fatalities caused by the *** fatality rate(CFR)is one of the cardinal epidemiological parameters that adequately explains epidemiology of the outbreak of a *** the present study,we employed two statistical regression models such as the linear and polynomial models in order to estimate the CFR,based on the early phase of COVID-19 outbreak in Nigeria(44 days since first reported COVID-19 death).The estimate of the CFR was determined based on cumulative number of confirmed cases and deaths reported from 23 March to 30 April,*** results from the linear model estimated that the CFR was 3.11%(95%CI:2.59%-3.80%)with R2 value of 90%and p-value of<*** findings from the polynomial model suggest that the CFR associated with the Nigerian outbreak is 3.0%and may range from 2.23%to 3.42%with R2 value of 93%and p-value of<***,the polynomial regression model with the higher R2 value fits the dataset well and provides better estimate of CFR for the reported COVID-19 cases in Nigeria.

关键词： Coronavirus COVID-19 SARS-CoV-2 Case fatality rate(CFR) Epidemiology Regression analysis

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吸气肌训练对改善脑卒中患者呼吸功能和步行能力的疗效：系统评价与Meta分析

吸气肌训练对改善脑卒中患者呼吸功能和步行能力的疗效：系统评价...

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作者： ahmad suleiman GHAZI YACOUB 大连医科大学

学位级别：硕士

背景:脑卒中是由于大脑相关区域的出血或梗死而突然发生的局灶性神经功能损伤。既往的研究表明,神经损伤引发的肌无力不仅见于四肢的肌肉,也见于呼吸肌,表现为患侧肋间肌、膈肌、腹肌无力,导致呼吸功能异常、呼吸模式改变,减少了肺通气... 详细信息

背景:脑卒中是由于大脑相关区域的出血或梗死而突然发生的局灶性神经功能损伤。既往的研究表明,神经损伤引发的肌无力不仅见于四肢的肌肉,也见于呼吸肌,表现为患侧肋间肌、膈肌、腹肌无力,导致呼吸功能异常、呼吸模式改变,减少了肺通气量和呼吸流量,从而增加了呼吸系统并发症的风险。目的:本文使用系统评价与meta分析,目的是收集有关吸气肌训练（inspiratory muscle training,IMT）在改善脑卒中患者呼吸功能、呼吸肌力量与步行能力方面的功效的最新信息。方法:从2010年1月至2021年12月,本文在MEDLINE、EMBASE和Web of Science数据库中进行了在线检索,给出了具有95%置信区间的平均差和风险比。此外,本文使用了Cochrane工具评估偏倚风险。研究选择和数据提取:选取11项随机对照试验（randomized controlled trials,RCTs）,测量脑卒中后患者IMT与非IMT或假IMT的效果。我们提取了有关呼吸肌肉力量、呼吸功能和步行能力的数据。结果:我们的研究纳入了11项RCTs的299名参与者。患者的年龄范围为54至68岁,样本量大小范围为12至51名参与者。脑卒中发病的时间为14天至17.90个月。11篇文献中有5篇涉及急性和亚急性期的脑卒中患者（脑卒中时间少于6个月）,6篇涉及慢性期的脑卒中患者（脑卒中时间长于6个月）。对11篇文献进行的Meta分析显示,IMT对最大吸气压力（maximum inspiratory pressure,MIP）(MD=15.42,95%CI:1.23至29.62,P=0.03)、吸气肌耐力（inspiratory muscle endurance,IME）(MD=18.04,95%CI:10.50至25.58,P<0.00001)、1秒内用力呼气量（forced expired volume in 1 second,FEV）(MD=0.24,95%CI:0.11至0.38,P=0.0005)、用力肺活量（forced vital capacity,FVC）(MD=0.28,95%CI:0.15至0.41,P<0。0001)、呼气峰值流速（peak expiratory flow,PEF）(MD=0.37,95%CI:0.06至0.68,P=0.02)和6分钟步行试验（6-minute walk test,6-MWT）(MD=40.79,95%CI:26.36至55.23,P<0.00001)具有有利影响。对收集到的数据进行亚组分析后发现,对于脑卒中时间少于6个月的患者,吸气肌训练对肺功能FEV、FVC和步行能力（6-MWT）有更好的影响。结论:对于脑卒中时间少于6个月的患者,吸气肌训练干预在改善肺功能参数（FEV、FVC、PEF）、吸气肌力量（MIP、IME）和步行能力等方面具有显著效果。

关键词：吸气肌训练脑卒中呼吸功能步行能力

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用乙基十六烷基二甲基溴化铵进行铜离子浮选

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国外金属矿选矿 1983年第11期 20-23页

作者： Curtis McDonald ahmad suleiman 张秀娥

本研究的目的在于确定诸如PH、流量、捕收剂与铜离子之比以及化学干扰因素等变量的影响,以便制订以离子浮选方法、用乙基十六烷基二甲基溴化铵（EHDABr）从水溶液中排除铜离子的最佳条件。在PH值6-11范围内,用乙基十六烷基二甲基溴化铵... 详细信息

本研究的目的在于确定诸如PH、流量、捕收剂与铜离子之比以及化学干扰因素等变量的影响,以便制订以离子浮选方法、用乙基十六烷基二甲基溴化铵（EHDABr）从水溶液中排除铜离子的最佳条件。在PH值6-11范围内,用乙基十六烷基二甲基溴化铵,能从6×10-5M的酒石酸溶液中定量地排除铜。大量外来的金属离子影响铜的浮选。但是,没有一种所研究的外来金属离子能影响浮游率降低10％。

关键词：离子浮选铜离子金属离子酒石酸钾二甲基二烷基乙基链烷基捕收剂浮选药剂铜浮选离子强度浮选效率去离子水离子交换水溴化铵溴化物铜络合物金属络合物烷基取代基

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应用乙基十六烷基二甲基铵溴化物浮选铜离子

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新疆有色金属 1985年第1期 73-76页

作者： CURTIS MCDONALD ahmad suleiman 刘春明

用乙基十六烷基二甲基铵溴化物（EHDABr）作捕收剂,采用离子浮选法,可从水溶液中分离出铜离子。为了找出最佳工艺条件,通过大量研究确定了不同的pH值、流量、捕收剂与铜的摩尔比、化学干扰等对浮选的影响。当pH值等于6—11时,在溶液中... 详细信息

用乙基十六烷基二甲基铵溴化物（EHDABr）作捕收剂,采用离子浮选法,可从水溶液中分离出铜离子。为了找出最佳工艺条件,通过大量研究确定了不同的pH值、流量、捕收剂与铜的摩尔比、化学干扰等对浮选的影响。当pH值等于6—11时,在溶液中有酒石盐的条件下,使用EHDABr可从6×10-5M的铜溶液中使铜分离出去。一些其它的金属离子对铜浮选有抑制作用,但对浮选效率的影响小于10％。

关键词：铜离子络合物酒石酸盐铜浮选配位化合物浮游选矿离子浮选法金属离子十六烷酒石酸钾二烷基二甲基浮选药剂捕收剂浮选效率摩尔比卤化物溴化物链烷基乙基

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A genetic algorithm based lookup table approach for optimal stepping sequence of open-loop stepper motor systems

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控制理论与应用（英文版） 2013年第1期11卷 35-41页

作者： suleiman BANIHANI Khalid AL-WIDYAN ahmad AL-JARRAH Mohammad ABABNEH Mechatronics Engineering Department The Hashemite University

Stepper motor driven systems are widely used in industrial applications. They are mainly used for their low cost open-loop high performance. However, as dynamic systems need to be increasingly faster and their motion more precise, it is important to have an open-loop system which is accurate and reliable. In this paper, we present a novel technique in which a genetic algorithm （GA） based lookup table approach is used to find the optimal stepping sequence of an open-loop stepper motor system. The optimal sequence objective is to minimize residual vibration and to accurately follow trajectory. A genetic algorithm is used to find the best stepping sequence which minimizes the error and improves the system performance. Numerical simulation has showed the effectiveness of our approach to improve the system performance for both position and velocity. The optimized system reduced the residual vibration and was able to follow the trajectory with minimal error.

关键词： Stepper motor Open-loop Genetic algorithm Optimal Stepping sequence Control

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Using Capsule Networks for Android Malware Detection Through Orientation-Based Features

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Computers, Materials & Continua 2022年第3期70卷 5345-5362页

作者： Sohail Khan Mohammad Nauman suleiman Ali Alsaif Toqeer Ali Syed Hassan ahmad Eleraky Deanship of Preparatory Year and Supporting Studies Computer Science DepartmentImam Abdulrahman Bin Faisal UniversityDammamSaudi Arabia National University of Computer and Emerging Sciences Pakistan Department of Computer Science Islamic University of MedinaMedinaSaudi Arabia

Mobile phones are an essential part of modern *** two popular mobile phone platforms,Android and iPhone Operating System(iOS),have an immense impact on the lives of millions of *** these two,Android currently boasts more than 84%market ***,any personal data put on it are at great risk if not properly *** the other hand,more than a million pieces of malware have been reported on Android in just 2021 till *** and mitigating all this malware is extremely difficult for any set of human *** to this reason,machine learning-and specifically deep learning-has been utilized in the recent past to resolve this ***,deep learning models have primarily been designed for image *** this line of research has shown promising results,it has been difficult to really understand what the features extracted by deep learning models are in the domain of ***,due to the translation invariance property of popular models based on ConvolutionalNeural Network(CNN),the true potential of deep learning for malware analysis is yet to be *** resolve this issue,we envision the use of Capsule Networks(CapsNets),a state-of-the-art model in deep *** argue that since CapsNets are orientation-based in terms of images,they can potentially be used to capture spatial relationships between different features at different locations within a sequence of *** design a deep learning-based architecture that efficiently and effectively handles very large scale malware datasets to detect Androidmalware without resorting to very deep *** leads tomuch faster detection as well as increased *** achieve state-of-the-art F1 score of 0.987 with an FPR of just 0.002 for three very large,real-world malware *** code is made available as open source and can be used to further enhance our work with minimal effort.

关键词： Malware security Android deep learning capsule networks

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Compact Multibeam Array with Miniaturized Butler Matrix for 5G Applications

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Computers, Materials & Continua 2022年第7期72卷 925-937页

作者： suleiman A.Babale Muhammad K.Ishfaq Ali Raza Jamal Nasir ahmad Fayyaz Umer Ijaz Department of Electrical Engineering Bayero UniversityKanoNigeria Department of Electrical Engineering Government College University FaisalabadPakistan Department of Electrical and Computer Engineering COMSATS University IslamabadAbbottabad CampusPakistan

This paper presents the design and implementation of a miniaturized beam steering network that produces broadside beams when it is fed with a compact antenna *** Matrix(BM)was used as the beam steering *** was completely built from a miniaturized 3 dB hybrid-couplers in planar microstrip *** was configured by feeding the BM with a Planar Inverted-E Antenna(PIEA)array separated at 0.3λas against the 0.5λ*** makes the BM produce a major radiation pattern at the *** from the miniaturization,no modification was made from the BM ***,employing effective mutual coupling reduction techniques helped to design the compact PIEA *** validity of this BM based multibeam PIEA array was demonstrated by comparing the simulation results of the reflection coefficients,transmissions coefficients and the radiation pattern with *** measurement results showed good agreement with simulations.

关键词： Beam steering compact butler matrix grating lobe and mutual coupling PIEA array

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Analysis of bacitracin and its related substances by liquid chromatography tandem mass spectrometry

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Journal of Pharmaceutical Analysis 2017年第1期7卷 48-55页

作者： suleiman Ahmed suleiman Fan Song Mengxiang Su Taijun Hang Min Song Department of Pharmaceutical Analysis China Pharmaceutical University Nanjing 210009 China

A suitable liquid chromatography quadrupole time-of-flight mass spectrometric(LC–Q-TOF–MS) method was developed for separation and characterization of related substances in bacitracin test drug. The separation was performed on Li Chrospher RP-18 column using methanol as mobile phase A and 0.2% ammonium acetate buffer solution as mobile phase B in gradient elution. A total of 12 related substances were detected through high resolution mass spectrometric determination in a positive electrospray ionization mode. They were identified as co-existing active components and degradation products of bacitracin through the analysis and elucidation of both the protonated parents and the product ions of all the related substances and their fragmentation pathways were also proposed.

关键词： Bacitracin Degradation products Fragmentation pathways Related substances LC–Q-TOF–MS

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Induction of Biochemical Changes in Santa Teriza Lime Leaves by Chitosan Application Influence Citrus Leaf Miner Damage

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American Journal of Plant Sciences 2022年第3期13卷 403-415页

作者： Batoul ahmad Sawsan suleiman Mohammed ahmad Horticulture Department Faculty of Agriculture Tishreen University Lattakia Syria Plant Protection Department Faculty of Agriculture Tishreen University Lattakia Syria

The effect of foliar spray of young lemon trees with Chitosan (CH) (200 - 300 - 400 ppm), on antioxidant enzymes activities (peroxidase POD, polyphenol oxidase PPO) and total phenolic content, and their influence on leaf miner (Phyllocnistis citrella) activity (tunnel length and damage density) under field condition was investigated. The results showed that treatment with chitosan 300 ppm enhanced the total phenolic content (5.975 mg/g) and the POD activity (0.533 min-1 mg-1 protein), while PPO activity was increased by chitosan 200 ppm (1.394 ΔA/min/g FW). The results demonstrated as well that chitosan treatment has a beneficial effect in reducing leaf miner activity, by decreasing tunnel length and damage density.

关键词： Citrus Chitosan Peroxidase Polyphenol Oxidase Total Phenolic Content Phyllocnistis citrella

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Estimation of cost savings from participation of electric vehicles in vehicle to grid(V2G)schemes

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Journal of Modern Power Systems and Clean Energy 2015年第2期3卷 249-258页

作者： Mahdi KIAEE Andrew CRUDEN suleiman SHARKH Energy Technology Research Group Engineering SciencesUniversity of Southampton Highfield CampusSouthampton SO171BJUK

The storage capacity of the batteries in an electric vehicle(EV)could be utilised to store electrical energy and give it back to the grid when needed by participating in vehicle to grid(V2G)*** participation could be a source of revenue for vehicle owners thus reducing the total charging cost of their EVs.A V2G simulator has been developed using MATLAB to find out the potential cost saving from participation of EVs in V2G schemes.A standard IEEE30 network has been modelled in the simulator which uses the MATPOWER engine to undertake power flow analysis.A novel control algorithm has been developed to take advantage of the difference between the selling and buying electricity prices by charging and discharging EVs at the appropriate *** scenarios are simulated to compare the total charging cost of EVs with or without the utilisation of V2G technology within the power system assuming a total of 5000 *** results of the simulation show that the applied control strategy with V2G is able to reduce the charging cost of EVs by 13.6%while satisfying the minimum requirement for state of charge(SoC)of the EV batteries to complete their next journey.

关键词： Electric vehicles Cost saving Electricity price Vehicle to grid

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