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叶面喷施腐植酸可使地表灌溉小麦的底肥量降到最低

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叶面喷施腐植酸可使地表灌溉小麦的底肥量降到最低

A Comprehensive Review on Charging Topologies and Power Electronic Converter solutions for Electric Vehicles

第八届全国绿色环保肥料（农药）新技术、新产品交流会

作者： s.h.a.shaaban F.M.Manal M.h.M.Afifi 张丽娜宋丽艳国家研究中心施肥技术部国家研究中心田间作物研究所中国农业科学院研究生院

2006/2007和2007/2008连续两个冬天在埃及的Khanater、Khairia、Kaliobia三个省的淤泥土上对小麦Giza168进行两组生产试验,用以研究叶面喷施工业化生产的包含N,P,K(10%,10%,10%)的2.9%腐植酸的效果,分别用0、2.5、5、7.5、10 cm/L浓度的腐植酸配合不同的氮磷钾比例(推荐用量的0%,25%,50%,75%和100%),研究小麦在养分吸收和产量构成因素方面的影响。数据显示:施用50%的氮磷钾肥料加5 cm/L的腐植酸用于叶面喷施可增加氮、磷、钾,钙和镁的吸收,同时,施用25%的氮磷钾肥料加7.5 cm/L的腐植酸用于叶面喷施可增加锰、锌和铜的吸收。数据还显示:施用50%的氮磷钾肥料加5 cm/L的腐植酸用于叶面喷施可导致粒长、粒重和产量(kg/fed)增加,同时施用50%的氮磷钾肥料加5 cm/L的腐植酸用于叶面喷施麦秆产量和生物学产量是最高的。上述结果表明:增加氮、磷、钾、钙、镁、铁、锰、锌和铜等营养元素的吸收可导致产量构成因素增加。

关键词：小麦腐植酸叶面喷施营养吸收

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Journal of Modern Power systems and Clean Energy 2024年第3期12卷 675-694页

作者： Abdelfatah Ali hossam h.h.Mousa Mostafa F.shaaban Maher A.Azzouz Ahmed s.A.Awad the Department of Electrical Engineering American University of Sharjah26666 SharjahUnited Arab Emirates the Department of Electrical Engineering South Valley University83523 QenaEgypt the Department of Electrical and Computer Engineering University of WindsorWindsorON N9B 3P4 Canada Electrical Engineering Department Qatar UniversityDoha 2713Qatar Department of Electrical and Computer Engineering Sultan Qaboos UniversityMuscat123Oman

Electric vehicles(EVs)are becoming more popular worldwide due to environmental concerns,fuel security,and price *** performance of EVs relies on the energy stored in their batteries,which can be charged using either AC(slow)or DC(fast)***,EVs can also be used as mobile power storage devices using vehicle-to-grid(V2G)*** electronic converters(PECs)have a constructive role in EV applications,both in charging EVs and in ***,this paper comprehensively investigates the state of the art of EV charging topologies and PEC solutions for EV *** examines PECs from the point of view of their classifications,configurations,control approaches,and future research prospects and their impacts on power *** can be classified into various topologies:DC-DC converters,AC-DC converters,DC-AC converters,and AC-AC *** address the limitations of traditional DC-DC converters such as switching losses,size,and high-electromagnetic interference(EMI),resonant converters and multiport converters are being used in high-voltage EV ***,power-train converters have been modified for high-efficiency and reliability in EV *** paper offers an overview of charging topologies,PECs,challenges with solutions,and future trends in the field of the EV charging station applications.

关键词： Charging station charging topology electric vehicle power electronic converter vehicle-to-grid

Free vibration and transient response of double curved beams connected by intermediate straight beams

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 37-62页

作者： R.A.JAFARI-TALOOKOLAEI h.GhANDVAR E.JUMAEV s.KhATIR T.CUONG-LE school of Mechanical Engineering Babol Noshirvani University of Technology Department of Mechanical Engineering Faculty of Engineering New Uzbekistan University University of Business and science Center for Engineering Application and Technology solutions Ho Chi Minh City Open University

This paper investigates the free vibration and transient response of interconnected structures including double curved beams and intermediate straight beams,which are all constructed from functionally graded porous(FGP) materials. The strain potential and kinetic energies of each beam along with the work done by the external force are calculated. Additionally, a higher-order beam element is introduced to derive stiffness and mass matrices, along with the force vector. The curved and straight beams are discretized, and their assembled stiffness, mass matrices, and force vectors, are *** conditions at the joints are used to derive the total matrices of the entire structure. subsequently, the natural frequencies and transient response of the system are determined. The accuracy of the mathematical model and the self-developed computer program is validated through the comparison of the obtained results with those of the existing literature and commercial software ANsYs, demonstrating excellent ***, a comprehensive study is conducted to investigate the effects of various parameters on the free vibration and transient response of the considered structure.

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Effect of vehicle safety recalls on the perception towards other vehicles from the same country of origin

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Journal of Traffic and Transportation Engineering(English Edition) 2019年第5期6卷 493-503页

作者： Khaled shaaban Amro Maher Anusorn singhapakdi Department of Civil and Architectural Engineering Qatar University Doha Qatar Beacom school of Business University of South Dakota Vermillion SD 57069 USA Department of Marketing Old Dominion University Norfolk VA 23529 USA

A vehicle safety recall significantly impacts the demand for these specific manufacturer *** effect of this recall on the other manufacturers from the same country of origin(COO) that are not involved in the recall is poorly *** purpose of this study is to examine the impact of a vehicle safety recall on other vehicle brands originating from the same *** study uses a case study related to Toyota recalls and the impact of the crises on the attitudes toward three other Japanese brands-namely,honda,Nissan,and Mazda.A questionnaire was conducted with 375 participants who are familiar with the *** findings from the questionnaire indicated that product-harm crises have an indirect negative effect on brands from the same ***,brands from the transgressor’s COO should not make the transgressor’s betrayal salient,which might hurt their *** example,if honda makes the betrayal of Toyota salient through comparative advertising,honda’s efforts might hurt the company directly through consumers’ image of Japanese *** research should examine the extent to which comparative advertising impacts non-transgressing brands that originate from the same country as the transgressing *** current results suggest that the non-transgressing companies might even assist the transgressing company to recover from such crises if consumers perceive a strong association between the non-transgressing brands and transgressing brands.

关键词： Automotive recalls Vehicle safety Car accidents Vehicle defects safety ratings

Joint Optimal Power source sizing and Data Collection Trip Planning for Advanced Metering Infrastructure Enabled by Unmanned Aerial Vehicles

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Journal of Modern Power systems and Clean Energy 2022年第5期10卷 1337-1348页

作者： haiam shahin Mostafa F.shaaban Mahmoud h.Ismail hebat-Allah M.Mourad Ahmed Khattab Department of Electronics and Communications Engineering Facultyof EngineeringCairo UniversityGiza 12613Egypt IEEE Department of Electrical Engineering American University of SharjahPOBox 26666SharjahThe United Arab Emirates

The use of unmanned aerial vehicles(UAVs) in the collection of data from wireless devices, sensor nodes, and the Internet of Things(IoT) devices has recently received significant attention. In this paper, we investigate the data collection process from a set of smart meters in advanced metering infrastructure(AMI) enabled by UAVs. The objective is to minimize the total annual cost of the electric utility by jointly optimizing the number of UAVs, their power source sizing, the charging locations as well as the data collection trip planning. This is achieved while considering the energy budgets of batteries of UAVs and the required amount of collected data. The problem is formulated as a mixed-integer nonlinear programming(MINLP), which is decoupled into two sub-problems where a candidate UAV and a number of buildings are first grouped into trips via genetic algorithms(GAs), and then the optimum trip path is found using a traveling salesman problem(TsP) branch and bound algorithm. simulation results show that the battery capacity or the number of UAVs increases as the coverage area or the density increases.

关键词： Advanced metering infrastructure unmanned aerial vehicle power source sizing trip planning genetic algorithm

Perceived stress and Coping styles among the General Population in saudi Arabia during COVID-19 Pandemic

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International Journal of Mental health Promotion 2022年第3期24卷 361-373页

作者： Waleed A.Alghamdi sami h.Alzahrani saeed s.shaaban Naseem A.Alhujaili Department of Medicine Faculty of MedicineKing Abdulaziz UniversityJeddah21589Saudi Arabia Department of Medicine Division of PsychiatryRabigh Faculty of MedicineKing Abdulaziz UniversityJeddah25732Saudi Arabia Department of Family Medicine Faculty of MedicineKing Abdulaziz UniversityJeddah21589Saudi Arabia

This article examines the stress levels,coping responses,and influence of adaptive and maladaptive coping styles on stress in saudi Arabia during the COVID-19 *** online cross-sectional survey was distributed to the attendees of a pandemic-related awareness *** questionnaire assessed demographic and clinical characteristics,coping strategies(the brief COPE inventory),and stress levels(the Perceived stress scale).A multivariate linear regression analysis was conducted to assess the predictors of *** highest adaptive and maladaptive coping styles were reported for religion and *** groups were independently more vulnerable to experience stress,including young-and middle-aged adults,females,students,and those with a lowto-middle income,with a personal or familial history of mental conditions,and living with someone with COVID-19 in their close *** levels of stress were also predicted by lower levels of using positive coping styles,particularly positive reframing,planning,and returning to religion,and higher levels of negative coping styles,such as venting,self-blame,and *** psychotherapeutic interventions through the media and digital solutions are warranted to mitigate and manage stress by targeting vulnerable groups,promoting active coping styles,and discouraging negative coping strategies.

关键词： Anxiety coronavirus public health pandemic mental health chronic illness

Optical properties and radiative rates of Nd^(3+) doped zinc-sodium phosphate glasses

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Journal of Rare Earths 2019年第3期37卷 253-259页

作者： A.A.El-Maaref shimaa Badr Kh.s.shaaban E.A.Abdel Wahab M.M.ElOkr Physics Department Faculty of Science Al-Azhar University Modern Academy for Engineering & Technology Chemistry Department Faculty of Science Al-Azhar University

Preparation using melt quenching technique and optical characterizations of Nd^(3+) doped Zn-Na phosphate glasses are presented. The structure of the present glasses was studied using X-ray diffraction and FT-IR spectroscopy. UV-vis spectra of the present glasses were analyzed at different concentrations of Nd_2 O_3. The effect of neodymium concentration on the density and energy band gap was investigated. The density of the present glasses slightly increases with the increasing of Nd_2 O_3. A small variation of energy band gap with the increasing of neodymium content is observed as well, while E_g values decrease with the increase of Nd_2 O_3 content. The E_g values lie between 4.36 and 4.69 eV. Based on the measured optical spectra, Judd-Ofelt theory was used to determine the optical parameters such as line strengths, optical intensity parameters(Ω_t), transition probabilities, and transition lifetimes. hypersensitive transitions were identified in the absorption spectrum, the greatest line strengths are recorded at the transitions^2 G_(7/2)+ ~4 G_(5/2), ~4 s_(3/2) + ~4 F_(7/2) and ~4 D_(1/2) + ~4 D_(3/2)+ ~4 D_(5/2) + ~2 I_(11/2) with wavelengths of 580, 475 and 355 nm,respectively. Lifetimes of the important ~4 F_(3/2) laser-level were determined; which show decreasing trend with the increasing of Nd_2 O_3 content and are found to be between 0.838 and 1.595 ms. The uncertainty of the present results was estimated. The RMs deviations were determined, which show lower values than those in the literature.

关键词： Phosphate glass UV-vis spectroscopy Judd-Ofelt Radiative rates Rear earth ions

Inundative field releases and evaluation of three predators for Bemisia tabaci （hemiptera： Aleyrodidae） management in three vegetable crops

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Insect science 2011年第2期18卷 195-202页

作者： Alvin M. simmons shaaban Abd-Rabou UsDA ARS U.S. Vegetable Laboratory Charleston South Carolina ARC PPRI Dokki Giza Egypt

The sweetpotato whitefly, Bemisia tabaci （Gennadius）（hemiptera： Aleyrodidae）, is a global pest on numerous crops, including vegetables. Weekly inundative releases of a coccinellid predator （Coccinella undecimpunctata L. [Coleoptera： Coccinellidae]）, a common green lacewing predator （Chrysoperla carnea stephen [Neuroptera： Chrysopidae]）, and a mirid predator （Macrolophus caliginosus [Wagner] [hemiptera： Miridae]） were independently made in three vegetable crops （cabbage [Brassica oleracea var. capitata L.], cucumber [Cucumis sativus L.], and squash [Cucurbita pepo L.]） for the management of the sweetpotato whitefly. Approximately 1 million to 2.5 million larvae or nymphs of each predator were released in the vegetable crops during 20 weeks. Whitefly populations were reduced by ≈ 25%-45% during most of the season in each crop where each predator was released. The effect of each predator was similar on whitefly population reduction. Late in the season （October） when whitefly populations were low, generally no benefit was obtained from releasing the predators. Numbers of predators recovered during sampling in all crops were greatest for C. carnea, but this corresponded with the fact that more individuals of this predator were released than any other predator in the experiment. These results help define the utility of these natural enemies for managing B. tabaci in vegetable crops.

关键词： Bemisia tabaci Chrysoperla carnea Coccinella undecimpunctata Macrolophus caliginosus inundative release sweetpotato whitefly

Dynamic stress concentration in an infinitely long cylindrical cavity due to a point spherical source embedded within a fluid-saturated poroelastic formation of infinite extent

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 139-156页

作者： h.hOssEINI O.BALILAshAKI Department of Mechanical Engineering Faculty of EngineeringGolestan University

The effects of a harmonically exciting monopole source on an infinitely long cylindrical cavity embedded entirely within a fluid-saturated poroelastic formation of infinite extent are examined theoretically. It is assumed that the source is located outside the cavity at a specified distance from the borehole axis. The magnitudes of the hoop and radial stresses beside the pore pressures exerted on the interface and inside the porous medium surrounding the borehole are calculated and discussed. Biot's poroelastic modeling along with three types of boundary conditions for the cylindrical interface including the ideal fluid, empty borehole, and rigid inclusion with a hard boundary is employed for the analysis. Utilizing a proper translational addition theorem for expressing the incident spherical wave in terms of cylindrical wave expansions, the proposed boundary conditions at the interface are satisfied. stresses are formulated by means of wave potential functions in a three-dimensional(3D) manner. The effects of the frequency and the radial distance between the source and borehole on the induced stresses are examined for the first cylindrical modes over frequency spectra. Two permeability conditions for the interface and three types of soils for the porous formation are considered throughout the analysis. To give an overall outline of the study, a numerical example is presented. The results clearly indicate that the distance is a key parameter and has considerable effects on the induced stress values. In addition, the interface permeability condition and soil characteristics play an important role in determining the dynamic response of the borehole. Finally,the obtained results are compared with the relevant analyses existing in the literature for some limit cases, and good agreement is achieved.

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