检索结果-南通市图书馆

On Vertex-Edge-Degree Topological Descriptors for Certain Crystal Networks

Computer Systems Science & Engineering 2022年第3期40卷 835-850页

作者： Sadia Husain Fouad A.Abolaban Ali Ahmad Muhammad Ahsan Asim yasir Ahmad College of Computer Sciences and Information Technology Jazan UniversitySaudi Arabia King Abdulaziz University College of EngineeringNuclear Engineering DepartmentJeddah21589Saudi Arabia

Due to the combinatorial nature of graphs they are used easily in pure sciences and social *** dynamical arrangement of vertices and their associated edges make them flexible(like liquid)to attain the shape of any physical structure or phenomenon *** the field of ICT they are used to reflect distributed component and communication among *** chemistry is another interesting domain of applied mathematics that endeavors to display the structure of compounds that are formed in result of chemical *** area attracts the researchers due to its applications in theoretical and organic *** also inspires the mathematicians due to involvement of mathematical *** or irregular bonding ability of molecules and their formation of chemical compounds can be analyzed using atomic valences(vertex degrees).Pictorial representation of these compounds helps in identifying their properties by computing different graph invariants that is really considered as an application of graph *** paper reflects the work on topological indices such as ev-degree Zagreb index,the first ve-degree Zagrebindex,the first ve-degree Zagrebindex,the second ve-degree Zagreb index,ve-degree Randic index,the ev-degree Randic index,the ve-degree atom-bond connectivity index,the ve-degree geometric-arithmetic index,the ve-degree harmonic index and the ve-degree sum-connectivity index for crystal structural networks namely,bismuth tri-iodide and lead *** this article we have determine the exact values of ve-degree and ev-degree based topological descriptors for crystal networks.

关键词： ev-degree ve-degree topological indices crystal networks

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Simulation of snowmelt-runoff under climate change scenarios in a data-scarce mountain environment

引用

International Journal of Digital Earth 2019年第8期12卷 910-930页

作者： Adnan Ahmad Tahir Samreen Abdul Hakeem Tiesong Hu Huma Hayat Muhammad yasir Department of Environmental Sciences COMSATS Institute of Information TechnologyAbbottabadPakistan State Key Laboratory of Water Resources and Hydropower Engineering Sciences Wuhan UniversityWuhanPeople’s Republic of China

Pakistan is an agriculture-based economy and major proportion of irrigation water for its cultivated lands is abstracted from the Upper Indus Basin(UIB).UIB water supplies are mostly contributed from the high-altitude snow and glacier fields situated in the Hindukush–Karakoram–Himalayan *** change in the flows of these river catchments due to climate variability may result in the form of catastrophic events like floods and droughts and hence will adversely affect the economy of *** study aims to simulate snowmelt runoff in a mountainous sub-catchment(Shyok River basin)of the UIB under climate change *** Runoff Model(SRM)coupled with remotely sensed snow cover product(MOD10A2)is used to simulate the snowmelt runoff under current and future climate scenarios in the study *** results indicate that(a)SRM has efficiently simulated the flow in Shyok River with average Nash–Sutcliff coefficient value(R2)of 0.8(0.63–0.93)for all six years(2000–2006)of basin-wide and zone-wise simulations,(b)an increase of 10%(by 2050)and 20%(by 2075)in SCA will result in a flow rise of∼11%and∼20%,respectively,and(c)an increase of 1℃(by 2025),2℃(by 2050),3℃(by 2075)and 4℃(by 2100)in mean temperature will result in a flow rise of∼26%,∼54%,∼81%and∼118%,*** study suggests that SRM equipped with remotely sensed snow cover data is an effective tool to estimate snowmelt runoff in high mountain data-scarce environments.

关键词： Upper Indus Basin(UIB) Shyok River basin MOD10A2 Snowmelt Runoff Model(SRM) climate change

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Dynamical system of a SEIQV epidemic model with nonlinear generalized incidence rate arising in biology

引用

International Journal of Biomathematics 2017年第7期10卷 107-125页

作者： Muhammad Altaf Khan yasir Khan Taj Wali Khan Saeed Islam Department of Mathematics Abdul Wali Khan University Mardan Khyber Pakhtunkhwa Pakistan Department of Mathematics University of Haft Al-Batin Haft Al-Batin 31991 Saudi Arabia

In this paper, a dynamical system of a SEIQV mathematical model with nonlinear generalized incidence arising in biology is investigated. The stability of the disease-free and endemic equilibrium is discussed. The basic reproduction number of the model is obtained. We found that the disease-free and endemic equilibrium is stable locally as well as globally asymptotically stable. For R0〈1, the disease-free equilibrium is stable both locally and globally and for R0〉1, the endemic equilibrium is stable globally asymptotically. Finally, some numerical results are presented.

关键词： Epidemic model SEIQV model vaccination global stability numerical solution.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Optimized Predictive Framework for Healthcare Through Deep Learning

引用

Computers, Materials & Continua 2021年第5期67卷 2463-2480页

作者： yasir Shahzad Huma Javed Haleem Farman Jamil Ahmad Bilal Jan Abdelmohsen A.Nassani Department of Computer Science University of PeshawarPeshawar25120Pakistan Department of Computer Science Islamia College PeshawarPeshawar25120Pakistan Department of Computer Science FATA UniversityKohat26100Pakistan Department of Management College of Business AdministrationKing Saud UniversityRiyadhSaudi Arabia

Smart healthcare integrates an advanced wave of information technology using smart devices to collect health-related medical science *** data usually exist in unstructured,noisy,incomplete,and heterogeneous *** these limitations remains an open challenge in deep learning to classify health *** this paper,a long short-term memory(LSTM)based health condition prediction framework is proposed to rectify imbalanced and noisy data and transform it into a useful form to predict accurate health *** imbalanced and scarce data is normalized through coding to gain consistency for accurate results using synthetic minority oversampling *** proposed model is optimized and ne-tuned in an end to end manner to select ideal parameters using tree parzen estimator to build a probabilistic *** patient’s medication is pigeonholed to plot the diabetic condition’s risk factor through an algorithm to classify blood glucose metrics using a modern surveillance error grid *** proposed model can efciently train,validate,and test noisy data by obtaining consistent results around 90%over the state of the art machine and deep learning techniques and overcoming the insufciency in training data through transfer *** overall results of the proposed model are further tested with secondary datasets to verify model sustainability.

关键词： Recurrent neural network long short-term memory deep learning Bayesian optimization surveillance error grid hyperparameter

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Comparison of Mechanical Properties of Acid and UV Ozone Treated Nanodiamond Epoxy Nanocomposites

引用

Journal of Materials Science & Technology 2014年第8期30卷 753-758页

作者： Sobia A.Rakha Naveed Ali yasir A.Haleem Fakhre Alam Aqeel A.Khurram Arshad Munir Experimental Physics Labs National Centre for Physics ComplexIslamabad 45320Pakistan Centre of Excellence in Science and Advance Technologies Islamabad 45320Pakistan Centre of Excellence in Solid State Physics University of the PunjabLahore 54590Pakistan Department of Physics Kohat UniversityKohat 26000Pakistan

Nanodiamond（ND） powder was successfully activated by wet chemical method and by exposure of UV/O3 in a chamber followed by mixing in triethylenetetramine（TETA） *** reinforcement role of activated ND in the mechanical properties of epoxy matrix was *** treatments,*** and UV/O3 provide ND surface with chemical functionalities for adhesion with epoxy *** transform infrared spectroscopy was utilized to confirm the attachment of surface groups to the ND *** low content of acid and UV/O3 activated ND was dispersed ultrasonically in the epoxy matrix separately to make *** mechanical properties of the nanocomposites were investigated under three point *** strong interactions among activated ND particles and the epoxy resin provide efficient load transfer interfaces,which enhances the mechanical properties of the *** was found that the flexural strength,modulus,and toughness of 0.1 wt%ND loaded nanocomposites have been enhanced up to 85%,57%,and 39%,respectively for UV/O3 treated ND *** is also found that the optimum ND concentration to achieve maximum reinforcement is 0.1 wt%while higher concentrations lead to decrease in mechanical *** significant improvement of the mechanical properties of the ND/epoxy nanocomposites is attributed to the good dispersion of the functionalized ND in epoxy matrix.

关键词： Nanodiamond Dispersion Mechanical properties Nanocomposites

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The convergence ball and error analysis of the two-step Secant method

引用

Applied Mathematics(A Journal of Chinese Universities) 2017年第4期32卷 397-406页

作者： LIN Rong-fei WU Qing-biao CHEN Min-hong KHAN yasir LIU Lu Department of Mathematics Taizhou University Department of Mathematics Zhejiang University Department of Mathematics Zhejiang Sci-Tech University

Under the assumption that the nonlinear operator has Lipschitz continuous divided differences for the first order,we obtain an estimate of the radius of the convergence ball for the two-step secant ***,we also provide an error estimate that matches the convergence order of the two-step secant *** last,we give an application of the proposed theorem.

关键词： two-step secant method estimate of radius convergence ball Lipschitz continuous

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Incidence and clinical presentation of portal vein thrombosis in cirrhotic patients

引用

Hepatobiliary & Pancreatic Diseases International 2016年第5期15卷 499-503页

作者： yasir Furkan Cagin Yahya Atayan Mehmet Ali Erdogan Firat Dagtekin Cemil Colak Division of Gastroenterology Medical Faculty Inonu University Malatya 44280 Turkey Division of Internal Medicine Medical Faculty Inonu University Malatya 44280 Turkey Division of Biostatistics and Medical Informatics Colak C Medical Faculty Inonu University Malatya 44280 Turkey

BACKGROUND: Portal vein thrombosis (PVT) is due to many risk factors, but its pathogenesis is still not clearly understood. To identify the risk factors for PVT, we analyzed the clinical characteristics and complications associated with PVT in cir-rhotic patients. METHODS: We studied patients with liver cirrhosis who were admitted to our unit from April 2009 to December 2014. The patients were divided into the PVT and non-PVT groups, and were compared by variables including gender, age, the etiology of cirrhosis, stage of cirrhosis, complications, imaging, and treatment. RESULTS: PVT was found in 45 (9.8%) of 461 cirrhotic pa-tients admitted to our hospital. Most patients (45.9%) had hepatitis B virus (HBV)-related cirrhosis, with a similar dis-tribution of etiologies between the groups. However, there was no positive relationship between PVT and etiologies of cirrhosis. Most patients (71.5%) were in the stage of hepatic decompensation. No statistically signiifcant differences were found in complications including esophageal varices, ascites, and hepatic encephalopathy between the groups. However, there was a signiifcant positive correlation between hepatocel-lular carcinoma (HCC) and PVT (P CONCLUSIONS: The incidence of PVT was 9.8%, mainly in patients with HBV-related cirrhosis. The development of PVT was associated with the severity of liver disease and HCC.

关键词： portal vein thrombosis cirrhosis clinical presentation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Stability Analysis of Predator-Prey System with Consuming Resource and Disease in Predator Species

引用

Computer Modeling in Engineering & Sciences 2022年第8期132卷 489-506页

作者： Asad Ejaz yasir Nawaz Muhammad Shoaib Arif Daoud S.Mashat Kamaleldin Abodayeh Department of Mathematics Air UniversityPAF Complex E-9Islamabad44000Pakistan Department of Mathematics King Abdulaziz UniversityJeddah22254Saudi Arabia Department of Mathematics and Sciences College of Humanities and SciencesPrince Sultan UniversityRiyadh11586Saudi Arabia

The present study is concerned with formulating a predator-prey eco-epidemiological mathematical model assuming that an infection exists in the predator *** two classes of predator species(susceptible and infected)compete for the same sources available in the environment with the predation *** is assumed that the disease does not spread *** proposed model is analyzed for the stability of the coexistence of the predators and *** fixed points are carried out,and the coexisting fixed point is studied in detail by constructing the Lyapunov *** movement of species in search of food or protection in their habitat has a significant influence,examined through *** ecological influences of self-diffusion on the population density of both species are *** is theoretically proved that all the under consideration species can coexist in the same *** coexistence fixed point is discussed for both diffusive and non-diffusive ***,a numerical scheme is constructed for solving time-dependent partial differential *** stability of the scheme is given,and it is applied for solving presently modified eco-epidemiological mathematical model with and without *** comparison of the constructed scheme with two exiting schemes,Backward in Time and Central in Space(BTCS)and Crank Nicolson,is also given in the form of ***,we run a computer simulation to determine the effectiveness of the proposed numerical *** readers’convenience,a computational code for the proposed discrete model scheme may be made available upon request.

关键词： Eco-epidemiology self-diffusion stability Lyapunov function proposed numerical scheme

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Kappaphycus alvarezii waste biomass:A potential biosorbent for chromium ions removal

引用

Journal of Environmental Sciences 2011年第6期23卷 918-922页

作者： Oon Lee Kang Nazaruddin Ramli Mamot Said Musa Ahmad Suhaimi Md yasir Arbakariya Ariff School of Chemical Sciences and Food Technology Faculty of Science and TechnologyUniversiti Kebangsaan Malaysia43600 BangiSelangorMalaysia School of Sciences and Technology Universiti Malaysia Sabah88400 Kota KinabaluSabahMalaysia Faculty of Biotechnology and Biomolecular Science Universiti Putra Malaysia43400 SerdangSelangorMalaysia

The Cr（III） sorption experiments onto Kappaphycus alvarezii waste biomass were conducted at different pH values（2-6） under the conditions of initial metal concentration of 10-50 mg/L and the chemical compositions of Cr-Cu and *** Cr（III） sorption capacities were slightly dependent on pH,and the maximum sorption capacity was 0.86 mg/g at pH *** sorption capacities increased with increase in the initial metal concentration,whereas it was suppressed by the presence of Cu（II） and Cd（III） in the *** Cr（III） sorption equilibrium was evaluated using Langmuir,Freundlich and BET *** sorption mechanisms were characterised using scanning electron microscopy and Fourier transform infrared *** main mechanisms were ion exchange coupled with a complexation *** alvarezii waste biomass represents a potential for Cr（III） ion removal from aqueous solution.

关键词： biosorption chromium Kappaphycus alvarezii

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Robotic surgery and liver transplantation:A single-center experience of 501 robotic donor hepatectomies

引用

Hepatobiliary & Pancreatic Diseases International 2022年第4期21卷 334-339页

作者： Maren Schulze Yasser Elsheikh Markus Ulrich Boehnert yasir Alnemary Saleh Alabbad Dieter Clemens Broering Organ Transplant Center of Excellence King Faisal Specialist Hospital&Research CentreP.O.Box 3354Riyadh 11211Saudi Arabia

Background:Over the past two decades robotic surgery has been introduced to many areas including liver *** liver surgery is an alternative minimally invasive ***,moving on to the complexity of living donor hepatectomies,the advantages of robotic versus laparoscopic approach have convinced us to establish the robotic platform as a standard for living donor ***:From November 2018 to January 2022,501 fully robotic donor hepatectomies,including 177 left lateral donor lobes,112 full left lobes and 212 full right lobes were *** were donated to 296 adult recipients and 205 pediatric *** age,sex,body weight,body mass index(BMI),graft weight,graft to body weight ratio(GBWR),operative time,blood loss,first warm ischemic time,pain score,length of intensive care unit(ICU)stay and hospital stay,and complications were retrospectively analyzed based on a prospectively kept *** were evaluated for graft and patient survival,age,sex,BMI,body weight,model of end-stage liver disease score,blood loss,transfusions,operative time,cold ischemic time,length of hospital stay and ***:There was no donor *** cases needed to be converted to open *** median blood loss was 60 mL(range 20-800),median donor operative time was 6.77 h(range 2.93-11.53),median length of hospital stay was 4 days(range 2-22).Complication rate in donors classified following ClavienDindo was 6.4%(n=32)with one grade Ⅲ ***-year actual recipient overall survival was 91.4%;87.5% for adult recipients and 97.1% for pediatric ***-year actual graft overall survival was 90.6%;87.5% for adult recipients and 95.1% for pediatric ***-hospital mortality was 6%,9.1%(27/296)for adult recipients and 1.4%(3/205)for pediatric *** recipients’morbidity was 19.8%(n=99).Twenty-eight recipients(5.6%)had biliary and 22(4.4%)vascular ***(12.0%)recipients needed to

关键词： Living liver donor Innovation Robotic donor surgery Donor safety Minimally invasive donor surgery

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：