检索结果-南通市图书馆

A Fast and Effective Multiple Kernel Clustering Method on Incomplete Data

Computers, Materials & Continua 2021年第4期67卷 267-284页

作者： Lingyun Xiang Guohan Zhao Qian Li Gwang-Jun Kim Osama Alfarraj amr Tolba Changsha Hunan Provincial Key Laboratory of Intelligent Processing of Big Data on Transportation School of Computer and Communication EngineeringChangsha University of Science and TechnologyChangsha410114China Hunan Key Laboratory of Smart Roadway and Cooperative Vehicle-Infrastructure Systems Changsha University of Science and TechnologyChangsha410114China Faculty of Engineering and Information Technology Global Big Data Technologies CentreUniversity of Technology SydneyUltimoNSW2007Australia Department of Computer Engineering Chonnam National UniversityGwangju61186Korea Computer Science Department Community CollegeKing Saud UniversityRiyadh11437Saudi Arabia Department of Mathematics and Computer Science Faculty of ScienceMenoua UniversityShebin-El-kom32511Egyp

Multiple kernel clustering is an unsupervised data analysis method that has been used in various scenarios where data is easy to be collected but hard to be ***,multiple kernel clustering for incomplete data is a critical yet challenging *** the existing absent multiple kernel clustering methods have achieved remarkable performance on this task,they may fail when data has a high value-missing rate,and they may easily fall into a local *** address these problems,in this paper,we propose an absent multiple kernel clustering(AMKC)method on incomplete *** AMKC method rst clusters the initialized incomplete ***,it constructs a new multiple-kernel-based data space,referred to as K-space,from multiple sources to learn kernel combination ***,it seamlessly integrates an incomplete-kernel-imputation objective,a multiple-kernel-learning objective,and a kernel-clustering objective in order to achieve absent multiple kernel *** three stages in this process are carried out simultaneously until the convergence condition is *** on six datasets with various characteristics demonstrate that the kernel imputation and clustering performance of the proposed method is signicantly better than state-of-the-art ***,the proposed method gains fast convergence speed.

关键词： Multiple kernel clustering absent-kernel imputation incomplete data kernel k-means clustering

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

Purslane protects against the reproductive toxicity of carbamazepine treatment in pilocarpine-induced epilepsy model

引用

Asian Pacific Journal of Tropical Biomedicine 2017年第4期7卷 339-346页

作者： Widad Makhdour Al-Bishri Eman Salah Abdel-Reheim amr Reda Zaki Biochemistry Department Faculty of ScienceAl Faisaliah CampusKing Abdulaziz University Department of Zoology Faculty of ScienceBeni-Suef University Department of Forensic Medicine and Clinical Toxicology Faculty of MedicineBeni-Suef University

Objective: To investigate the protective effect of purslane with carbamazepine ***: Male albino rats were modulated by pilocarpine to be *** the normal and epileptic rats were treated with carbamazepine, purslane or carbamazepine plus purslane, with separate non-treated control groups for both normal and epileptic ***: The data from the current study showed amelioration in amino acids and electrolytes in the epileptic rats treated with purslane and carbamazepine, with this amelioration occurring without decreasing the fertility hormones(testosterone,dehydroepiandrosterone, luteinizing hormone and follicle stimulating hormone).Purslane treatments also prevented the increase in *** decreased epileptic hyperexcitability with purslane was evidenced by decreased glial fibrillary acidic protein and lipid ***: Natural products like purslane could be used with the highly repetitive drugs like carbamazepine to reduce or prevent its side-effects.

关键词： Pilocarpine Purslane Carbamazepine Epilepsy Fertility hormones

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

A Sustainable WSN System with Heuristic Schemes in IIoT

引用

Computers, Materials & Continua 2022年第9期72卷 4215-4231页

作者： Wenjun Li Siyang Zhang Guangwei Wu Aldosary Saad amr Tolba Gwang-jun Kim School of Computer and Communication Engineering Changsha University of Science and TechnologyChangsha410114China College of Computer and Information Engineering Central South University of Forestry and TechnologyChangsha410114China Computer Science Department Community CollegeKing Saud UniversityRiyadh11437Saudi Arabia Mathematics and Computer Science Department Faculty of ScienceMenoufia UniversityEgypt Department of Computer Engineering Chonnam National UniversityGwangju61186Korea

Recently, the development of Industrial Internet of Things hastaken the advantage of 5G network to be more powerful and more ***, the upgrading of 5G network will cause a variety of issues increase,one of them is the increased cost of coverage. In this paper, we proposea sustainable wireless sensor networks system, which avoids the problemsbrought by 5G network system to some extent. In this system, deployingrelays and selecting routing are for the sake of communication and *** main aim is to minimize the total energy-cost of communication underthe precondition, where each terminal with low-power should be charged byat least one relay. Furthermore, from the perspective of graph theory, weextract a combinatorial optimization problem from this system. After that,as to four different cases, there are corresponding different versions of theproblem. We give the proofs of computational complexity for these problems,and two heuristic algorithms for one of them are proposed. Finally, theextensive experiments compare and demonstrate the performances of thesetwo algorithms.

关键词： Industrial Internet of Things sustainable wireless sensor network system combinatorial optimization problem heuristic algorithms

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

Does the scleral encircling band provide a protective effect against the progression of diabetic retinopathy?

引用

International Journal of Ophthalmology(English edition) 2019年第9期12卷 1408-1414页

作者： Hossam Youssef Abouelkheir Amani E Badawi amr M.Abdelkader amr El-Kanishy Sameh Saleh Waleed Ali Abou Samra Manal Ali Kasem Tharwat Mokbel Mansoura Ophthalmic Center Faculty of Medicine Mansoura University

AIM: To evaluate the effect of scleral encircling bands on the development and progression of diabetic retinopathy(DR) in diabetic ***: The medical records of diabetic patients who underwent unilateral retinal detachment(RD) surgery using scleral buckle and encircling band were reviewed retrospectively. Both eyes of patients were included in the study: one eye in each patient had a scleral buckle with encircling band(the operated eye) and the other one is the non-operated eye. The demographic characters, duration of diabetes and period between surgery and the last recall visit were retrieved from each patient. All the cases underwent fundus photo and fluorescein angiography(when indicated) to confirm the DR ***: Totally 25 patients fulfilled the inclusion and the exclusion criteria were become eligible for the study. A total of 50 eyes of 25 patients were enrolled in this analysis. The mean period of time passed from surgery with encircling band and the last reassessment visit was 12.5±2 y. Even though DR could develop in the operated eyes, it was at a less degree of severity compared to the non-operated eyes of same patients(P=0.027).CONCLUSION: Scleral encircling bands have protective effects against the development and progression of DR.

关键词： diabetic retinopathy scleral encircling bands retinal detachment

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

Micro-fabrication of ceramics:Additive manufacturing and conventional technologies

引用

Journal of Advanced Ceramics 2021年第1期10卷 1-27页

作者： Hany HASSANIN Khamis ESSA amr ELSHAER Mohamed IMBABY Heba H.EL-MONGY Tamer A.EL-SAYED School of Engineering Canterbury Christ Church UniversityCanterburyCT11QUUK University of Birmingham EdgbastonB152TTUK Kingston University London Penrhyn RoadKingston Upon ThamesSurreyKT12EEUK Department of Mechanical Design Faculty of EngineeringMatariaHelwan UniversityP.O.Box.11718CairoEgypt Jubail University College Mechanical EngineeringKingdom of Saudi Arabia Center for Applied Dynamics Research(CADR) School of EngineeringUniversity of AberdeenAberdeenAB243UEUK

Ceramic materials are increasingly used in micro-electro-mechanical systems(MEMS)as they offer many advantages such as high-temperature resistance,high wear resistance,low density,and favourable mechanical and chemical properties at elevated ***,with the emerging of additive manufacturing,the use of ceramics for functional and structural MEMS raises new opportunities and *** paper provides an extensive review of the manufacturing processes used for ceramic-based MEMS,including additive and conventional manufacturing *** review covers the micro-fabrication techniques of ceramics with the focus on their operating principles,main features,and processed *** that need to be addressed in applying additive technologies in MEMS include ceramic printing on wafers,post-processing at the micro-level,resolution,and quality *** paper also sheds light on the new possibilities of ceramic additive micro-fabrication and their potential applications,which indicates a promising future.

关键词： micro-electro-mechanical system(MEMS) micro-fabrication ceramics micro parts additive manufacturing

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

New smart home energy management systems based on inclining block-rate pricing scheme

引用

Clean Energy 2022年第3期6卷 503-511页

作者： Rasha Elazab Omar Saif amr M.A.Amin Metwally Mohamed Daowd Electrical Power and Machines Department Faculty of Engineering at Helwan UniversityCairoEgypt

There are wide applications of block-rate pricing schemes in many ***,there are no significant studies that apply this common tariff for smart home energy management *** this paper,a three-time-frame energy management scheme has been proposed for photovoltaic(PV)-powered grid-connected smart homes based on the well-known mixed-integer linear programming optimization *** paper provides three original and novel smart home energy management algorithms that depend on the most common residential tariff specifically in developing *** different management concepts have been studied for a typical Egyptian *** concepts of shifting load,vehicle-to-home and reducing air conditioning have been tested according to a commonly applied slab *** proposed scheme considers the home battery extending lifetime *** also preserves comfortable lifestyle limits for home users according to Arab housing climatic conditions and ***,the economic feasibility of integrated PV modules for the studied home has been verified according to the Egyptian *** proposed energy management scheme of PV-powered home reduces the electrical power bill significantly in a wide range from 61%to only 19%of the default case bill according to the applied management technique.

关键词： smart homes energy management system inclining block-rate tariff mixed linear integer programming

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

Self-Tuning Parameters for Decision Tree Algorithm Based on Big Data Analytics

引用

计算机、材料和连续体（英文） 2023年第4期75卷 943-958页

作者： Manar Mohamed Hafez Essam Eldin F.Elfakharany amr A.Abohany Mostafa Thabet College of Computing and Information Technology Arab Academy for ScienceTechnology&Maritime TransportCairoEgypt Faculty of Computers and Information Kafrelsheikh UniversityKafrelsheikhEgypt Faculty of Computers and Information Fayoum UniversityFayoumEgypt

Big data is usually unstructured, and many applications require theanalysis in real-time. Decision tree (DT) algorithm is widely used to analyzebig data. Selecting the optimal depth of DT is time-consuming process as itrequires many iterations. In this paper, we have designed a modified versionof a (DT). The tree aims to achieve optimal depth by self-tuning runningparameters and improving the accuracy. The efficiency of the modified (DT)was verified using two datasets (airport and fire datasets). The airport datasethas 500000 instances and the fire dataset has 600000 instances. A comparisonhas been made between the modified (DT) and standard (DT) with resultsshowing that the modified performs better. This comparison was conductedon multi-node on Apache Spark tool using Amazon web services. Resultingin accuracy with an increase of 6.85% for the first dataset and 8.85% for theairport dataset. In conclusion, the modified DT showed better accuracy inhandling different-sized datasets compared to standard DT algorithm.

关键词： Big data classification decision tree Amazon web services

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

Data Secure Storage Mechanism of Sensor Networks Based on Blockchain

引用

Computers, Materials & Continua 2020年第12期65卷 2365-2384页

作者： Jin Wang Wencheng Chen Lei Wang R.Simon Sherratt Osama Alfarraj amr Tolba School of Information Science and Engineering Fujian University of TechnologyFuzhou350118China School of Computer&Communication Engineering Changsha University of Science&TechnologyChangsha410004China School of Civil Engineering Changsha University of Science&TechnologyChangsha410000China Department Biomedical Engineering University of ReadingReadingRG66AYUK Computer Science Department Community CollegeKing Saud UniversityRiyadh11437Saudi Arabia Mathematics and Computer Science Department Faculty of ScienceMenoufia UniversityShebin-El-Kom32511Egypt

As the number of sensor network application scenarios continues to grow,the security problems inherent in this approach have become obstacles that hinder its wide ***,it has attracted increasing attention from industry and *** blockchain is based on a distributed network and has the characteristics of non-tampering and traceability of block *** is thus naturally able to solve the security problems of the sensor ***,this paper first analyzes the security risks associated with data storage in the sensor networks,then proposes using blockchain technology to ensure that data storage in the sensor networks is *** the traditional blockchain,the data layer uses a Merkle hash tree to store data;however,the Merkle hash tree cannot provide non-member proof,which makes it unable to resist the attacks of malicious nodes in *** solve this problem,this paper utilizes a cryptographic accumulator rather than a Merkle hash tree to provide both member proof and non-member ***,the number of elements in the existing accumulator is limited and unable to meet the blockchain’s expansion *** paper therefore proposes a new type of unbounded accumulator and provides its definition and security ***,this paper constructs an unbounded accumulator scheme using bilinear pairs and analyzes its performance.

关键词： Sensor networks blockchain unbounded accumulator storage mechanism

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

Outcome of non surgical hepatic decompression procedures in Egyptian patients with Budd-Chiari

引用

World Journal of Gastroenterology 2011年第7期17卷 906-913页

作者： Ahmed Eldorry Eman Barakat Heba Abdella Sara Abdelhakam Mohamed Shaker amr Hamed Mohammad Sakr Department of Radiodi-agnosis and Interventional Radiology Faculty of Medicine AinShams University Department of Tropical Medicine Faculty of Medicine Ain Shams University

AIM: To evaluate outcome of patients with Budd-Chiari syndrome after balloon angioplasty ± stenting or transjugular intrahepatic portosystemic shunt (TIPS). METHODS: Twenty five patients with Budd-Chiari syndrome admitted to Ain Shams University Hospitals, Tropical Medicine Department were included. Twelve patients (48%) with short segment occlusion were candidates for angioplasty; with stenting in ten cases and without stenting in two. Thirteen patients (52%) had Transjugular Intrahepatic Portosystemic Shunt. Patients were followed up for 12-32 mo. RESULTS: Patency rate in patients who underwent angioplasty ± stenting was 83.3% at one year and at end of follow up. The need of revision was 41.6% with one year survival of 100%, dropped to 91.6% at end of follow up. In patients who had Transjugular Intrahepatic Portosystemic Shunt, patency rate was 92.3% at one year, dropped to 84.6% at end of follow up. The need of revision was 38.4% with one year and end of follow up survival of 100%. Patients with patent shunts showed marked improvement compared to those with occluded shunts. CONCLUSION: Morbidity and mortality following angioplasty ± stenting and TIPS are low with satisfactory outcome. Proper patient selection and management of shunt dysfunction are crucial in improvement.

关键词： Angioplasty Stenting Transjugular Intrahepatic portosystemic shunt Patency rate

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 Behaviors of Nonlinear Coronavirus (COVID-19) Model with Numerical Studies

引用

Computers, Materials & Continua 2021年第4期67卷 675-686页

作者： Khaled A.Gepreel Mohamed S.Mohamed Hammad Alotaibi amr M.S.Mahdy Department of Mathematics College of ScienceTaif UniversityTaif21944Saudi Arabia Department of Mathematics Zagazig UniversityZagazig44519Egypt Department of Mathematics Al-Azher UniversityNasr City11884Egypt

The development of mathematical modeling of infectious diseases is a key research area in various elds including ecology and *** aim of these models is to understand the dynamics of behavior in infectious *** the new strain of coronavirus(COVID-19),there is no vaccine to protect people and to prevent its spread so ***,control strategies associated with health care,such as social distancing,quarantine,travel restrictions,can be adopted to control the pandemic of *** article sheds light on the dynamical behaviors of nonlinear COVID-19 models based on two methods:the homotopy perturbation method(HPM)and the modied reduced differential transform method(MRDTM).We invoke a novel signal ow graph that is used to describe the COVID-19 *** our mathematical studies,it is revealed that social distancing between potentially infected individuals who are carrying the virus and healthy individuals can decrease or interrupt the spread of the *** numerical simulation results are in reasonable agreement with the study *** free equilibrium and stability point for the COVID-19 model are ***,the existence of a uniformly stable solution is proved.

关键词： Nonlinear COVID-19 model equilibrium point stability existence of uniformly stable signal ow graph homotopy perturbation method reduced differential transform method

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

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：