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Mango malformation: II. mangiferin changes associated with fusarium pathogens

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Experimental investigation of photovoltaic systems for performance improvement using water cooling

Agricultural Sciences（农业科学） 2011年第3期

作者： Wafaa M. Haggag mahmoud hazza Mohamed E. Abd El-Wahab

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Clean Energy 2023年第4期7卷 721-733页

作者： Hussain Attia Khaled Hossin Muataz Al hazza Department of Electrical and Electronic Engineering American University of Ras Al KhaimahRas Al KhaimahUnited Arab Emirates Department of Mechanical and Industrial Engineering American University of Ras Al KhaimahRas Al KhaimahUnited Arab Emirates Mechanical Engineering Department University of BenghaziLibya

This research aims to analyse the comparative performance of two identical photovoltaic(PV)panels with load variations and integrating an automated water-cooling process under the climatic conditions of the United Arab *** work also presents the steps of system design,implementation and performance evaluation of the proposed PV system,and all electrical,control and mechanical components along with how they were integrated within a 100-W PV ***/Simulink?was used only to simulate the behaviours of the PV panel under wide ranges of incident sunlight and ambient *** tests were performed for a day-long operation during a clear summer *** experimental results demonstrate an improvement in the PV system performance compared with the uncooled system by~1.6%in terms of total harvested energy using the proposed water-cooling process with a frequency of 2 minutes of cooling operation every 30 minutes during day hours.

关键词： photovoltaic panel water-cooling power curves MATLAB/Simulink experimental investigation

Interference Management for Dynamic TDD in C-RAN

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Interference Management for Dynamic TDD in C-RAN

作者： AHMED NABIL hazza 北京邮电大学

学位级别：硕士

移动手机用户爆炸式的业务量增长为未来5G移动蜂窝网络提出了挑战。研究预测在2025年时网络将会呈现“1000倍的数据业务需求增长”。显然,当前的蜂窝网络无法应对上述需求。多输入多输出(Multiple-input multiple-output,MIMO)技术可以... 详细信息

移动手机用户爆炸式的业务量增长为未来5G移动蜂窝网络提出了挑战。研究预测在2025年时网络将会呈现“1000倍的数据业务需求增长”。显然,当前的蜂窝网络无法应对上述需求。多输入多输出(Multiple-input multiple-output,MIMO)技术可以提供空间自由度并能够有效支持多用户通信。同时,动态时分双工(Dynamic Time DivisionDuplex,D-TDD)系统具出有效控制用户业务流的强大潜力。在D-TDD系统中,上行(Uplink,UL)及下行(Downlink,DL)资源可以在多小区中被灵活调度以满足业务需求。然而,D-TDD中存在的干扰可能影响系统性能的提升。目前,针对传统蜂窝网络和异构网络已有很多干扰管理方案提出,但是关于D-TDD中的干扰管理研究还相对较少。最近,云无线接入网(Cloud Radio Access Network,C-RAN)已被提出,并有望通过集中式的管理有效提升网络的频谱效率、能量效率,同时能够降低网络运维成本。建立在C-RAN结构之上,本文将考虑多小区、多用户MIMOD-TDD系统中的干扰管理问题,其中每一个小区有一个M天线的基站和N个具备L天线的用户。一般而言,D-TDD系统中的基站可以依据瞬时的业务需求进行上行或者下行传输。针对MU-MIMO在D-TDD系统中的应用,系统中将呈现两类主要干扰,分别是:小区内干扰,主要由小区内MU-MIMO传输造成;小区间干扰,主要由不同小区间的上下行非同步传输造成。为了消除D-TDD系统中存在的各类干扰,本文提出了基于机会干扰对齐(Opportunistic Interference Alignment,OIA)的传输方案体系,即OIA-DTDD。其中,本文首先提出了基于参考信号空间(Reference Signal Space,RSS)的干扰觉知用户调度方案,仅选取合适的用户参与通信。通过合理的用户调度,小区内以及小区间的干扰都可以得到有效控制。更进一步,本文提出了基于RSS的基站收发机设计以消除小区之间的干扰。在D-TDD系统中,本文所提的OIA-DTDD整体方案设计显示出较传统非干扰觉知方案更好的干扰消除能力。

关键词：异构网络动态十分双工云无线接入网多输入多输出机会干扰对齐

HPCC+：数据中心网络中公平-延迟折中的传输控制协议

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HPCC+：数据中心网络中公平-延迟折中的传输控制协议

作者： Mohammed Nabil hazza Ali（纳毕）北京邮电大学

学位级别：硕士

数据中心网络（DCNs）中拥塞控制机制的研究主要集中在如何实现DCNs的三个主要目标:高带宽、低延迟和稳定性。高精度拥塞控制（HPCC）同时实现了这些目标。但是其公平性欠佳。本论文主要研究如何改进HPCC,从而提升其公平性。本研究提出... 详细信息

数据中心网络（DCNs）中拥塞控制机制的研究主要集中在如何实现DCNs的三个主要目标:高带宽、低延迟和稳定性。高精度拥塞控制（HPCC）同时实现了这些目标。但是其公平性欠佳。本论文主要研究如何改进HPCC,从而提升其公平性。本研究提出对HPCC进行有效的调整,对HPCC-WAI（window additive increase）中最重要的参数之一进行了广泛的研究,该参数负责控制并发流数量和收敛速度与公平性之间的权衡。其中的重点是通过更改生成此参数值的公式来找到此参数的最佳值。在WAI值的生成过程中,主要依赖于流的个数,每次流的个数发生变化时,都会生成一个新的WAI值,这一过程影响到公平性。所提出的WAI最优值的关键思想不是完全依赖于流的数量,而是不管流的数量或其数据的大小如何,为WAI找到一个恒定的值,以实现公平性和零队列长度的快速收敛。在仿真中,该方法在通过最佳公平性提高HPCC性能的过程中的实验结果非常令人满意。经过大量观察和评估过程,选择250MB作为WAI的最佳值,这证明该值为HPCC提供了公平性,高链路利用率和零队列长度的最佳值。

关键词：数据中心网络拥塞控制机制 HPCC 窗口加性增加公平性低延迟高利用率

Mango Malformation: I. Toxin Production Associated with Fusarium Pathogens

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American Journal of Plant Sciences 2011年第2期2卷 276-281页

作者： Wafaa Haggag M. hazza M. Sehab A. Abd El-Wahab M. Department of Plant Pathology National Research Center Science Faculty Botany Department Banha University

Eight Fusarium species i.e. F. subglutinans, F. solani, F. oxyspoum, F. sterilihyphosum, F. proliferatum, F. monili-forme, F. avena and F. chlamydspore isolated from mango malformed disease were tested for their ability to cause mango malformation disease and their production of moniliformin and total fumonisins (FB1 + FB2) using HPLC. A evaluated for moniliformin production, seven isolates were toxin producers, the production levels ranging from 0.51 to 8.90 μg/ml. The higher levels were produced by Fusarium subglutinans (8.51 μg/ml). Moderate concentrations of moniliformin was produced by *** (6.90 μg/ml), F. oxysporum (6.30 μg/ml), F. proliferatum (4.10 μg/ml) and F. sterilihyphosum (1.10 μg/ml). Separation and identification of Fumonisin that was isolated from the pathogen- causing disease are made by (HPLC). A evaluated for total fumonisin production (FB1 + FB2), seven isolates were toxin producers, the production levels ranging from 0.10 to 8.30 μg/ml. The higher levels were produced by F. monili-forme (8.30 μg/ml. Moderate concentrations of fumonisin was produced by F .proliferatum (0.64 μg/ml) and F. subglutinans (0.50 μg/ml). Strong positive correlations between moniliformin and total fumonisins (FB1 + FB2) activities and malformation disease incidence by F. subglutinans, F. solani, F. oxyspoum, F. sterilihyphosum, F. proliferatum was observed.

关键词： Fusarium Mango Malformation Moniliformin And Fumonisins

Molecular identification of mango malformation pathogens in Egypt

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Advances in Bioscience and Biotechnology 2011年第4期2卷 226-232页

作者： Wafaa M Haggag M hazza M. M Saker M. Abd El-Wahab Department of Plant Pathology National Research Center Cairo Egypt

Diagnostic tests by molecular biology is made for studying the relations among Fusarium species for linking production of proteins, degree of relationship and occurrence of malformation. Determination of proteins for isolates causing-disease by SDS-PAGE explained there’s specific band for each fungus and there are common bands among some isolates of fungi. Since, band with MW 30 KDa represented only in F. proliferatum and F. oxysporum and F. subglutinans respectively. This band considered as specific band for these isolates, which released high pathogenisity effect. RAPD–PCR markers were used to discriminate variations between Fusarium isolates and causing disease. There is specific band for each fungus which act as molecular marker for each fungus and there are some bands common among some isolates of pathogenic fungi. The dendrogram shows there is degree of relationship between F. sterilihyphosum and F. proliferatum;between F. moniliforme and F. subglutinans;between F. oxysporum and F. chlamydospore;the degree of relationship among F. subglutinans, F. proliferatum and F. sterilihyphosum and degree of relationship among F. moniliforme, F. sterilihyphosum, F. proliferatum and F.

关键词： Fusarium Spp. Mango Malformation

Influence of Oxalate Concentration and Temperature on the Microstructure Morphology of Nano Anodized Copper Coating

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材料科学与工程（中英文A版） 2018年第4期8卷 155-165页

作者： M. H. Mahmood Suryanto Muataz H. F. Al hazza Farag I. Haider Department of Manufacturing and Material Engineering IIUM International Islamic University Malaysia Kuala Lumpur P.O. Box 10 50728 Malaysia