检索结果-南通市图书馆

A V2I communication-based pipeline model for adaptive urban traffic light scheduling

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Computer Science 2019年第5期13卷 929-942页

作者： Libing WU Lei NIE Samee U. KHAN osman khalid Dan WU School of Cyber Science and Engineering Wuhan University Wuhan 430072 China School of Computer Science Wuhan University Wuhan 430072 China School of Computer Science and Technology Wuhan University of Science and Technology Wuhan 430065 China Department of Electrical and Computer Engineering North Dakota State University Fargo USA COMS ATS Institute of Information Technology Islamabad Pakistan School of Computer Science University of Windsor Windsor Ontario Canada

Adaptive traffic light scheduling based on realtime traffic information processing has proven effective for urban traffic congestion management. However, fine-grained information regarding individual vehicles is difficult to acquire through traditional data collection techniques and its accuracy cannot be guaranteed because of congestion and harsh environments. In this study, we first build a pipeline model based on vehicle-to-infrastructure communication, which is a salient technique in vehicular adhoc networks. This model enables the acquisition of fine-grained and accurate traffic information in real time via message exchange between vehicles and roadside units. We then propose an intelligent traffic light scheduling method (ITLM) based on a “demand assignment” principle by considering the types and turning intentions of vehicles. In the context of this principle, a signal phase with more vehicles will be assigned a longer green time. Furthermore, a green-way traffic light scheduling method (GTLM) is investigated for special vehicles (e.g., ambulances and fire engines) in emergency scenarios. Signal states will be adjusted or maintained by the traffic light control system to keep special vehicles moving along smoothly. Comparative experiments demonstrate that the ITLM reduces average wait time by 34%-78% and average stop frequency by 12%-34% in the context of traffic management. The GTLM reduces travel time by 22%^44% and 30%-55% under two types of traffic conditions and achieves optimal performance in congested scenarios.

关键词： traffic light scheduling vehicular ad hoc networks pipeline model vehicle-to-infrastructure communication intersection

Adaptive Multi-Cost Routing Protocol to Enhance Lifetime for Wireless Body Area Network

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2022年第7期72卷 1089-1103页

作者： Muhammad Mateen Yaqoob Waqar Khurshid Leo Liu Syed Zulqarnain Arif Imran Ali Khan osman khalid Raheel Nawaz Department of Computer Science COMSATS University IslamabadAbbottabad Campus22060Pakistan Department of OTEHM Manchester Metropolitan UniversityManchesterUK

Wireless Body Area Network(WBAN)technologies are emerging with extensive applications in several *** is a fascinating domain of WBAN for smart monitoring of a patient’s *** important factor to consider in WBAN is a node’s *** the lifetime of nodes is critical to address many issues,such as utility and *** routing protocols have addressed the energy conservation problem but considered only a few parameters,thus affecting their ***,most of the existing schemes did not consider traffic prioritization which is critical in *** this paper,an adaptive multi-cost routing protocol is proposed with a multi-objective cost function considering minimum distance from sink,temperature of sensor nodes,priority of sensed data,and maximum residual energy on sensor *** performance of the proposed protocol is compared with the existing schemes for the parameters:network lifetime,stability period,throughput,energy consumption,and path *** is evident from the obtained results that the proposed protocol improves network lifetime and stability period by 30%and 15%,respectively,as well as outperforms the existing protocols in terms of throughput,energy consumption,and path loss.

关键词： Multi-cost routing protocol network lifetime wireless body area network adaptive routing residual energy clustering poisson distribution

The New Technology on Optimizing the Performance in (Sudani) Telecommunication Company

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The New Technology on Optimizing the Performance in (Sudani)...

作者：阿萨弟（ASAAD osman khalid MOHAMED）东北农业大学

学位级别：硕士

人力资源管理是公司的重点,尤其是人力资源管理的作用和实施新技术对提高工人纪律和绩效的作用,以使公司绩效最大化。可以说人力资源的效率是通过控制公司内部员工的出勤率来衡量的。从苏丹电信公司的绩效管理情况进行研究,研究周期为2... 详细信息

人力资源管理是公司的重点,尤其是人力资源管理的作用和实施新技术对提高工人纪律和绩效的作用,以使公司绩效最大化。可以说人力资源的效率是通过控制公司内部员工的出勤率来衡量的。从苏丹电信公司的绩效管理情况进行研究,研究周期为2014年-2015年一年时间,利用excel进行样本整理和线性回归分析。从2014年-2015年这项研究测量员工绩效的比例根据自己的标准时。未经许可或未取得许可证,旷工记录被分为缺勤记录。此外,这项研究还测量了员工的缺勤率后,操作指纹系统相比,最初使用的方法(手册)控制日常出勤,第一次研究的结果表明,该公司有有效的人力资源经理。因此,未经授权的部门没有许可证的情况与未获得许可证的人相比非常低,因此不带任何借口的离职率最高的是商业优良率50.64%,其次是业务支持,百分比为47.38%,首席执行官为43.81%。此后,IT部门的百分比为42.47%。另一方面,持有许可证的缺勤率最高的是COE 90.1%,公司销售89.96%和公司87.71%最后销售86.89%。这项研究的第二部分旨在分析使用指纹的优点,确切地说是在旷工方面。研究得出的结论是指纹系统已经提高了工人的出勤率。然而,比例最高的无系统实施后为人力资源0.33%,操作0.3%,牢记之前的比例是无庸置疑的新技术的实施将提升公司业绩集团首席技术官0.12%场。此外,利用这种无操作工具可以减少工人的位移,从而提高公司业绩。最后,研究得出结论,尽管员工的一致性或人力资源管理的力量仍然使用新技术,将扩大公司的盈利能力。随后,加快实现所画目标的过程。

关键词：资源管理苏丹电信公司人力资源管理

Human Kallikrein-2 and Free Prostate Specific Antigen as Biomarkers for Early Detection of Prostate Cancer, Sudan: A Case-Control Study

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Open Journal of Clinical Diagnostics 2023年第1期13卷 9-21页

作者： osman khalid Yousif Badreldin Elsonni Abdalla Mohammed Alimam M. Ahmed Sami Mahjoub Taha Ahmed Al Siddiq Ebraheem Muawia Mohamed Ahmed Elhadi Abdalla Ahmed Departmentof Biochemistry and Nutrition Faculty of Medicine University of Gezira Wad Madani Sudan Department of Surgery Faculty of Medicine University of Gezira Wad Madani Sudan Department of Internal Medicine Faculty of Medicine University of Gezira Wad Madani Sudan Basic Sciences Department Faculty of Applied Medical Sciences University of Gezira Wad Madani Sudan Department of Medical Microbiology Faculty of Medical Laboratory Sciences University of Gezira Wad Madani Sudan

Background: Prostate cancer (PCa) is considered one of the major health threats facing males in Sudan. Prostate-specific antigen (PSA) test is the most important laboratory test used in the diagnosis of prostate cancer, the main disadvantage of PSA is its limited specificity, which triggered a lot of interest in development, more research on other markers such as serum human kallikrein-2 (KLK-2) and free prostate specific antigen (fPSA). Objectives: To evaluate the validity of serum kallikrein-2 (KLK-2) and free prostate specific antigen (fPSA) in the early detection of prostate cancer among Sudanese patients. Method: In this study seventy men were considered as a case subject, who were diagnosed as cancer prostate at Gezira Hospital for Renal Disease and Surgery (GHRDS), Sudan during the period February 2018 to July 2019. Randomly selected sixty patients of BPH patients and forty-five apparently healthy men as control subject. KLK-2, fPSA and PSA estimations were performed from serum samples using the principle of Enzyme Linked Immunosorbent Assay (ELISA). Results: The results revealed a highly significant difference between the serum levels individual biomarkers (KLK-2, fPSA, PSA) and multiple biomarkers (fPSA/PSA, KLK-2/fPSA, KLK-2/PSA) for patients with prostate cancer when compared with the control groups. Furthermore, the fPSA/PSA ratio was lower in the patients with prostate cancer (P value = 0.00) than in the control group, the fPSA/PSA ratio showed that best accuracy to differentiate prostate cancer from control group, fPSA cut-off value was found to be more than (18 ng/ml), with sensitivity (93%), specificity (80%), and odds ratio (55). Conclusions: The use of multiple biomarkers rather than individual biomarkers especially fPSA/PSA ratio improves the specificity as well as maintenance of higher sensitivity for early diagnosis of the prostate cancer.

关键词： Kallikrein-2 PSA fPSA Prostate Cancer Sudan

A Robust Video Watermarking Scheme with Squirrel Search Algorithm

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2022年第5期71卷 3069-3089页

作者： Aman Bhaskar Chirag Sharma khalid Mohiuddin Aman Singh osman A.Nasr Mamdooh Alwetaishi Computer Science and Engineering Lovely Professional UniversityPunjab144411India Department of Management Information Systems King Khalid UniversityGuraigerAbha62529Saudi Arabia Department of Civil Engineering College of EngineeringTaif UniversityTaif21944Saudi Arabia

Advancement in multimedia technology has resulted in protection against distortion,modification,and *** implementing such protection,we have an existing technique called watermarking but obtaining desired distortion level with sufficient robustness is a challenging task for watermarking in multimedia *** the paper,we proposed a smart technique for video watermarking associating meta-heuristic algorithms along with an embedding method to gain an optimized *** main aim of the optimization algorithm is to obtain solutions with maximum robustness,and which should not exceed the set threshold of *** represent the accuracy of the proposed scheme,we employ a popular video watermarking technique(DCT domain)having frame selection and embedding method for watermarking.A squirrel search algorithm is chosen as a meta-heuristic algorithm that utilizes the stated fitness *** results indicate that quality constraint is fulfilled,and the proposed technique gives improved robustness against different attacks with several quality *** proposed technique could be practically implemented in several multimedia applications such as the films industry,medical imagery,OOT platforms,etc.

关键词： Meta-heuristic algorithm constrain optimization problem fitness fiction frame selection squirrel search algorithm

Decoding molecular mechanisms:brain aging and Alzheimer's disease

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第8期20卷 2279-2299页

作者： Mahnoor Hayat Rafay Ali Syed Hammad Qaiser Mohammad Uzair khalid Al-Regaiey Roaa Khallaf Lubna Abdullah Mohammed Albassam Imdad Kaleem Xueyi Wang Ran Wang Mehwish SBhatti Shahid Bashir Atta-ur-Rahman School of Applied Biosciences(ASAB) National University of Sciences and Technology(NUST)IslamabadPakistan Department of Biotechnology Quaid-i-Azam UniversityIslamabadPakistan Department of Biological Sciences Faculty of Basic&Applied SciencesInternational Islamic University Islamabad(IIUI)IslamabadPakistan Department of Bioengineering King Fahd University of Petroleum and MineralsDhahranSaudi Arabia Department of Physiology College of MedicineKing Saud UniversityRiyadhSaudi Arabia Department of Neurology Neuroscience CenterKing Fahad Specialist HospitalDammamSaudi Arabia Department of Mental Health Neuroscience CenterKing Fahad Specialist HospitalDammamSaudi Arabia Department of Biosciences Commission on Science and Technology for Sustainable Development in the South(COMSATS University)IslamabadPakistan Department of Psychiatry The First Hospital of Hebei Medical UniversityShijiazhuangHebei ProvinceChina Mental Health Institute of Hebei Medical University ShijiazhuangHebei ProvinceChina Department of Neurobiology and Behavior University of CaliforniaIrvineCAUSA Neuroscience Center King Fahad Specialist Hospital DammamDammamSaudi Arabia

The complex morphological,anatomical,physiological,and chemical mechanisms within the aging brain have been the hot topic of research for *** aging process alters the brain structure that affects functions and cognitions,but the worsening of such processes contributes to the pathogenesis of neurodegenerative disorders,such as Alzheimer's *** these observable,mild morphological shifts,significant functional modifications in neurotransmission and neuronal activity critically influence the aging *** these changes is important for maintaining cognitive health,especially given the increasing prevalence of age-related conditions that affect *** review aims to explore the age-induced changes in brain plasticity and molecular processes,differentiating normal aging from the pathogenesis of Alzheimer's disease,thereby providing insights into predicting the risk of dementia,particularly Alzheimer's disease.

关键词： Alzheimer’s disease brain aging cognitive health dementia molecular mechanisms neuronal activity neuroplasticity neurotransmission

Mechanical characteristics of oil palm fiber reinforced thermoplastics as filament for fused deposition modeling(FDM)

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

Advances in Manufacturing 2020年第1期8卷 72-81页

作者： Mohd Nazri Ahmad Mohammad khalid Wahid Nurul Ain Maidin Mohd Hidayat Ab Rahman Mohd Hairizal osman Izzati Fatin Alis@Elias Faculty of Mechanical and Manufacturing Engineering Technology Universiti Teknikal Malaysia Melaka.Hang Tuah JayaDurian Tunggal 76100MelakaMalaysia Centre for Smart System and Innovative Design Universiti Teknikal Malaysia MelakaHang Tuah JayaDurian Tunggal 76100MelakaMalaysia

Fibers are increasingly in demand for a wide range of polymer composite *** study^purpose was the development of oil palm fiber(OPF)mixed with the thermoplastic material acrylonitrile butadiene styrene(ABS)as a composite filament for fused deposition modeling(FDM).The mechanical properties of this composite filament were then *** is a fiber extracted from empty fruit bunches,which has proved to be an excellent raw material for *** cellulose content of OPF is 43%-65%,and the lignin content is 13%-25%.The composite lilament consists of OPF(5%,mass fraction)in the ABS *** fabrication procedure included alkalinizing,drying,and crushing the OPF to develop the *** OPF/ABS materials were prepared and completely blended to acquire a mix of 250 g of the material for the ***,the FLD25 filament extrusion machine was used to form the OPF/ABS composite into a *** composite filament then was used in an FDM-based 3D printer to print the ***,the printed specimens were tested for mechanical properties such as tensile and flexural *** results show that the presence of OPF had increased the tensile strength and modulus elasticity by approximately 1.9%and 1.05%,***,the flexural strength of the OPF/ABS composite had decreased by 90.6%compared with the virgin ***,the most significant outcome of the OPF/ABS composite was its suitability for printing using the FDM method.

关键词： Natural fibers Oil palm fiber(OPF) Fused deposition modeling(FDM) 3D printer Composite filament

Application of maximum rank distance codes in designing of STBC-OFDM system for next-generation wireless communications

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Digital Communications and Networks 2024年第4期10卷 1048-1056页

作者： Arslan khalid Prapun Suksompong School of Information Computer and Communication TechnologySirindhorn International Institute of TechnologyThammasat UniversityPathumthani12000Thailand

Space-Time Block Coded(STBC)Orthogonal Frequency Division Multiplexing(OFDM)satisfies higher data-rate requirements while maintaining signal quality in a multipath fading ***,conventional STBCs,including Orthogonal STBCs(OSTBCs),Non-Orthogonal(NOSTBCs),and Quasi-Orthogonal STBCs(QOSTBCs),do not provide both maximal diversity order and unity code rate simultaneously for more than two transmit *** paper targets this problem and applies Maximum Rank Distance(MRD)codes in designing STBCOFDM *** following the direct-matrix construction method,we can construct binary extended finite field MRD-STBCs for any number of transmitting *** uses MRD-STBCs built over Phase-Shift Keying(PSK)modulation to develop an MRD-based STBC-OFDM *** MRD-based STBC-OFDM system sacrifices minor error performance compared to traditional OSTBC-OFDM but shows improved results against NOSTBC and *** also provides 25%higher data-rates than OSTBC-OFDM in configurations that use more than two transmit *** tradeoffs are minor increases in computational complexity and processing delays.

关键词： Bit error rate(BER) Galois field Maximum rank distance(MRD)codes Orthogonal frequency division multiplexing (OFDM) Primitive polynomials Space-time block codes(STBC)

Application of Hilbert's Projective Metric on Symmetric Cones

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

Acta Mathematica Sinica,English Series 2006年第5期22卷 1467-1472页

作者： khalid KOUFANY Institut Elie Cartan UMR 7502(UHP-CNRS-INRIA)Université Henri Poincaré(Nancy 1)B.P.239F-54506 Vandoeuvre-lès-Nancy CedexFrance

Let Ω be a symmetric cone. In this note, we introduce Hilbert＇s projective metric on Ω in terms of Jordan algebras and we apply it to prove that, given a linear invertible transformation g such that g（Ω） = Ω an... 详细信息

关键词： Hilbert's projective metric Symmetric cone