检索结果-南通市图书馆

Dynamic channel estimation-aware routing protocol in mobile cognitive radio networks for smart IIoT applications

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

Digital Communications and Networks 2023年第2期9卷 367-382页

作者： Qusay M.Salih Md Arafatur Rahman A.Taufiq Asyhari Muhammad Kamran Naeem Mohammad patwary Ryan alturki Mohammed Abdulaziz Ikram Faculty of Computing Universiti Malaysia Pahang26300GambangPahangMalaysia School of Engineering Computing and Mathematical SciencesUniversity of WolverhamptonUK Data Science Program Monash UniversityIndonesiaand Birmingham City UniversityB47XGUK Department of Information Science College of Computer and Information SystemsUmm Al-Qura UniversitySaudi Arabia Computer Science Department Al Jumoum University CollegeUmm Al-Qura UniversitySaudi Arabia

Cognitive Radio Networks(CRNs)have become a successful platform in recent years for a diverse range of future systems,in particularly,industrial internet of things(IIoT)*** order to provide an efficient connection among IIoT devices,CRNs enhance spectrum utilization by using licensed ***,the routing protocol in these networks is considered one of the main problems due to node mobility and time-variant channel ***,the channel selection for routing protocol is indispensable in CRNs to provide an adequate adaptation to the Primary User(PU)activity and create a robust routing *** study aims to construct a robust routing path by minimizing PU interference and routing delay to maximize throughput within the IIoT ***,a generic routing framework from a cross-layer perspective is investigated that intends to share the information resources by exploiting a recently proposed method,namely,Channel Availability ***,a novel cross-layer-oriented routing protocol is proposed by using a time-variant channel estimation *** protocol combines lower layer(Physical layer and Data Link layer)sensing that is derived from the channel estimation ***,it periodically updates and stores the routing table for optimal route ***,in order to achieve higher throughput and lower delay,a new routing metric is *** evaluate the performance of the proposed protocol,network simulations have been conducted and also compared to the widely used routing protocols,as a *** simulation results of different routing scenarios demonstrate that our proposed solution outperforms the existing protocols in terms of the standard network performance metrics involving packet delivery ratio(with an improved margin of around 5–20%approximately)under varying numbers of PUs and cognitive users in Mobile Cognitive Radio Networks(MCRNs).Moreover,the cross-layer routing protocol successfully achiev

关键词： Channel selection Cross-layer design Mobile cognitive radio networks Routing protocol IIoT applications

Double-E-Triple-H-Shaped NRI-Metamaterial for Dual-Band Microwave Sensing Applications

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6期71卷 5817-5836页

作者： Shafayat Hossain Md.Iquebal Hossain patwary Sikder Sunbeam Islam Sultan Mahmud Norbahiah Binti Misran ali F.almutairi Mohammad Tariqul Islam Department of Electrical&Electronics Engineering International Islamic University Chittagong4318ChittagongBangladesh Department of Electrical Electronic and Systems EngineeringFaculty of Engineering and Built EnvironmentUniversiti Kebangsaan MalaysiaBangiSelangor43600Malaysia Electrical Engineering Department Kuwait UniversityKuwait City13060Kuwait

This paper presents a new Double-E-Triple-H-Shaped NRI(negative refractive index)metamaterial(MM)for dual-band microwave sensing ***,a horizontal H-shaped metal structure is enclosed by two face-to-face E-shaped metal *** double-E-H-shaped design is also encased by two vertical H-shaped structures along with some copper ***,the Double-E-Triple-H-Shaped configuration is *** popular substrate materials of Rogers RO 3010 and FR-4 were adopted for analyzing the characteristics of the unit *** proposed structure exhibits transmission resonance inside the S-band with NRI and ENG(Epsilon Negative)metamaterial properties,and inside the C-band with ENG and MNG(Mu Negative)metamaterial properties.A good effective medium ratio(EMR)of 8.06 indicates the compactness and effectiveness of the proposed *** analysis has been done by changing the thickness of the substrate material as well and a significant change in the effective medium ratio is *** validity of the proposed structure is confirmed by an equivalent circuit *** simulated result agrees well with the calculated *** exploring microwave sensing applications of the proposed unit cell,permittivity and pressure sensitivity performance were investigated in different simulation *** compact size,effective parameters,high sensitivity and a good EMR represent the proposed metamaterial as a promising solution for S-band and C-band microwave sensing applications.

关键词： Metamaterial NRI MNG ENG dual-band sensing S-band C-band

Application of GEE Models for Assessing Maternal Health Complications

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Applied Mathematics 2021年第7期12卷 563-575页

作者： Mohammad Shaha alam patwary Soma Chowdhury Biswas Department of Mathematics Statistics and Actuarial Science Butler University Indianapolis IN USA Department of Statistics University of Chittagong Chittagong Bangladesh

Bangladesh, a developing country, gained success towards the fifth-millennium development goals target of reducing its maternal mortality ratio by three quarters by 2015, but yet worked more on it for further reduction of maternal mortality. In this light, though Bangladesh is committed to the sustainable development goals target of reducing its maternal mortality ratio to be reduced from 170 to 105 per 100,000 live births, the scope of research on this issue is limited because the maternal morbidity data is scarce in Bangladesh. In this paper, the prospective data on maternal morbidity in rural Bangladesh (collected by BIRPERHT) have been employed to trace out the high-risk and life-threatening factors associated with pregnancy-related complications. The subject-specific generalized estimating equations (SS-GEE) model with random effect structure is used for multivariate binary data for the repeated observations. The findings indicate that the risk of suffering from pregnancy complications is higher for high economic status, lower age at marriage, not visited for medical check-ups, outside home workers, and having miscarriage or abortion. Comparing the SS-GEE model with other correlation structures and relative efficiency factors, the SS-GEE model with random effect structure is well fitted for the prospective repeated observation data.

关键词： Multivariate Binary Response Repeated Observations GEE Random Effect Pregnancy Complications

Bank Credit and Agricultural Output in Bangladesh: An Econometric Analysis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Macro Management & Public Policies 2022年第4期4卷 16-22页

作者： Shahidul Islam Sazzad Hossain patwary Department of Banking and Insurance University of DhakaDhaka1000Bangladesh 2 Department of Finance and Banking Begum Rokeya UniversityRangpur5400Bangladesh

In this study,the authors tried to identify the relationship between bank credit and agricultural output in *** impact assessment of bank credit on agricultural output is also *** econometric techniques are used to determine the nature of the relationship between bank credit and agricultural output and the impact of bank credit.A total of 40 years(1981-2020)of annual time series data were collected from the Annual Reports of the Bangladesh Bank and World Bank’s world development *** and cointegration tests were performed initially and then analyzed with Vector Error Correction Model,confirming a long-run relationship between bank credit and agricultural ***,univariate and multivariate OLS models are performed to identify the magnitude of bank credit’s impact on agricultural *** models revealed that bank credit positively and significantly affects agricultural production in *** on these findings,the authors recommend additional fund allocation to the agricultural production system by the banks in Bangladesh.

关键词： Bank credit Agricultural output Bangladesh

Universal Intelligent Small Cell （UnISCell） for next generation cellular networks

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 2016年第4期2卷 167-174页

作者： Mohammad patwary Shree Krishna Sharma Symeon Chatzinotas Yunfei Chen Mohamed Abdel-Maguid Raed Abd-alhameed James Noras Bjorn Ottersten FCES Staffordshire University United Kingdom Interdisciplinary Centre for Security Reliability and Trust (SnT) University ofLuxemboury 4 rue Alphonse Weicker Luxembourg L-2721 Luxembourg University of Warwick United Kingdom University of Suffolk United Kingdom University of Bradford United Kingdom

Exploring innovative cellular architectures to achieve enhanced system capacity and good coverage has become a critical issue towards realizing the next generation of wireless communications. In this context, this paper proposes a novel concept of Universal Intelligent Small Cell （UnISCell） for enabling the densification of the next generation of cellular networks. The proposed novel concept envisions an integrated platform of providing a strong linkage between different stakeholders such as street lighting networks, landline telephone networks and future wireless networks, and is universal in nature being independent of the operating frequency bands and traffic types. The main motivating factors for the proposed small cell concept are the need of public infrastructure re-engineering, and the recent advances in several enabling technologies. First, we highlight the main concepts of the proposed UnISCell platform. Subsequently, we present two deployment scenarios for the proposed UnISCell concept considering infrastructure sharing and service sharing as important aspects. We then describe the key future technologies for enabling the proposed UnISCell concept and present a use case example with the help of numerical results. Finally, we conclude this article by providing some interesting future recommendations.

关键词： Next Generation Wireless Small Cell Public Infrastructure Re-engineering 5G Deployment

A Review of the Study on the Electromigration and Power Electronics

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Electronics Cooling and Thermal Control 2016年第1期6卷 19-31页

作者： Md. Khalilur Rahman Abul Monsur Mohammed Musa Budrun Neher Kawchar Ahmed patwary Mohammad Atiqur Rahman Md. Shariful Islam Department of Physics Comilla University Comilla Bangladesh Department of Physics University of Chittagong Chittagong Bangladesh Department of Chemistry Comilla University Comilla Bangladesh Department of ICT Comilla University Comilla Bangladesh

Electromigration is a main challenge in the pursuit of power electronics, because physical limit to increase current density in power electronics is electromigration (EM), whereas much higher electrical current and voltage are required for power electronics packaging. So the effect of EM is an important issue in applications where high current densities are used, such as in microelectronics and related structures (e.g., Power ICs). Since the structure size of integrated circuits (ICs) decreases and the practical significance of this effect increases, the result is EM failure. On the other hand, in the next generation power electronics technology electrical current density is expected to exceed 107 A/cm2 which is another challenge. This review work has been carried out to identify the mechanism of EM damage in power electronics (e.g., pure metallization and solder joints) and also how to control this kind of damage.

关键词： Voids and Hillocks Interconnect Solder Joint Thermomigration MTF Reliability of IC

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

江篱同源多倍体的生长实验

国外水产 1986年第3期 11-14页

作者： Mohsin U.patwary 李美真

有关海洋红藻江蓠(Gracilaria tikvahi-ae)生长的一些研究工作已经有所报道。这种藻类生长快并含有有价值的琼胶。据报道,在最适或接近最适的生长条件下,某些野生型品系干物质的产量可与那些高产的陆生植物相媲美(Lapointe 和 Ryther,19... 详细信息

有关海洋红藻江蓠(Gracilaria tikvahi-ae)生长的一些研究工作已经有所报道。这种藻类生长快并含有有价值的琼胶。据报道,在最适或接近最适的生长条件下,某些野生型品系干物质的产量可与那些高产的陆生植物相媲美(Lapointe 和 Ryther,1978)。然而野生江蓠的养殖并没有十分成功的把握,虽然已有较理想结果的报道,即以"奥卡"(Orca)命名的快速生长品系具有大量分枝的形态(Ryther 等,1979)。最近有人发现,某些起源于野生型江蓠的形态突变型,

关键词：多倍体多元体藻体生长率性成熟

饮用水砷暴露与QT间期延长:砷对健康影响的纵向研究结果

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

环境与职业医学 2013年第7期30卷 550-550页

作者： Yu Chen Fen Wu Faruque Parvez alauddin Ahmed Mahbub Eunus Tyler R.McClintock Tazul Islam patwary Tariqul Islam Anajan Kumar Ghosal Shahidul Islam Rabiul Hasan Diane Levy Golam Sarwar Vesna Slavkovich alexander van Geen Joseph H.Graziano Habibul Ahsan

[背景]饮用水砷暴露与心脏疾病相关联,然而内在的机制尚不明确。[目的]评估饮用水砷暴露史与心率校正的QT(QTc)、PR和QRS间期延长之间的关联。[方法]从砷对健康影响的纵向研究中选择1715名基线入组的参加者进行研究。评估2005—2010年间... 详细信息

[背景]饮用水砷暴露与心脏疾病相关联,然而内在的机制尚不明确。[目的]评估饮用水砷暴露史与心率校正的QT(QTc)、PR和QRS间期延长之间的关联。[方法]从砷对健康影响的纵向研究中选择1715名基线入组的参加者进行研究。评估2005—2010年间,井水中的砷暴露和尿液样本与心电图(ECG)参数的关联,自基线开始平均跟踪了5.9年。[结果]QTc延长的定义为男性QTc≥450ms,女性≥460ms。井水中砷每增加1-SD(108.7μg/L),QTc延长的调整比值比(OR)为1.17(95%CI:1.01～1.35)。正相关仅限于女性,基线时井水和尿液中的砷每增加1-SD,女性调整后ORs分别比为1.24(95%CI:1.05～1.47)和1.24(95%CI:1.01～1.53);与之相比,男性调整后ORs分别为0.99(95%CI:0.73～1.33)和0.86(95%CI:0.49～1.51)。基线时井水砷或尿砷与女性或男性的PR或QRS间期延长之间无明显的关联。[结论]长期饮用水砷暴露(平均95μg/L,全距为0.1～790μg/L)与女性之后的QT间期延长相关联。在今后的纵向研究中,ECG的反复测量对于评估暴露变化的影响将具有重要意义。

关键词：砷孟加拉心血管疾病心电图心率校正的QT间期环境暴露