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heterophase junction engineering-induced Co spin-state modulation of CoSe_(2) for large-current hydrogen evolution reaction

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Rare metals 2024年第6期43卷 2660-2670页

作者： Bao-Chai Xu Ya-Ping miao min-Qin mao Dong-Lian Li Song Xie Wei-hong Jin Shu Xiao Jing Wen Zaenab Abd-allah Zhi-Tian Liu Xiang Peng Paul K.Chu hubei Key Laboratory of Plasma Chemistry and Advanced materials School of Materials Science and EngineeringWuhan Institute of TechnologyWuhan 430205China School of Textile Science and Engineering Xi'an Polytechnic UniversityXi'an 710048China Institute of Advanced Wear and Corrosion Resistant and Functional materials Jinan UniversityGuangzhou 510632China Institute of Safety Science and Engineering South China University of TechnologyGuangzhou 510641China Department of Engineering Manchester Metropolitan UniversityManchester M156BHUK Department of Physics Department of Materials Science and Engineeringand Department of Biomedical EngineeringCity University of Hong KongHong Kong 999077China

Efficient electrocatalysts are vital to large-current hydrogen production in commercial water splitting for green energy ***,a novel heterophase engineering strategy is described to produce polymorphic CoSe_(2)*** composition of the electrocatalysts consisting of both cubic CoSe_(2)(c-CoSe_(2))and orthorhombic CoSe_(2)(o-CoSe_(2))phases can be controlled *** results demonstrate that junction-induced spin-state modulation of Co atoms enhances the adsorption of intermediates and accelerates charge transfer resulting in superior large-current hydrogen evolution reaction(hER)***,the CoSe_(2)based heterophase catalyst with the optimal c-CoSe_(2)content requires an overpotential of merely 240 mV to achieve 1,000 mA·cm^(-2)as well as a Tafel slope of 50.4 mV·dec^(-1).Furthermore,the electrocatalyst can maintain a large current density of 1,500 mA·cm^(-2)for over 320 h without *** results reveal the advantages and potential of heterophase junction engineering pertaining to design and fabrication of low-cost transition metal catalysts for large-current water splitting.

关键词： heterophase junction Spin-state hydrogen evolution reaction Large current electrochemical hydrogen production Water splitting

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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 h.bat-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

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Generalized general and special relativity in the presence of the gravitation, related to the space-time curvature

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Natural Science 2012年第5期4卷 336-339页

作者： m. h. m. hilo m. D. Abd allah Kh. m. haroon A. h. Abd Elrahman Department of Physics Faculty of Education Al-Zaiem Al-Azhari University Omdurman Sudan Department of Physics Faculty of Science and Arts at Al-Muznib Qassim University Al-Muznib Saudi Arabia Department of Physics Faculty of Science and Arts at Unizah Qassim University Unizah Saudi Arabia Department of Physics Faculty of Science Sudan University of Science and Technology Khartoum Sudan

Using the equation of motion expression in a curved space proper time is a useful method to explain the relation between the curvature of space-time and the potential of any field obtained. Taking into account the expression for the hamiltonian density, the effect of fields, as well as the effect motion, on the mass, and, their effect on energy is found. The new expression of energy reduced to the ordinary Newton’s energy expression. It also explains the gravitational red shift.

关键词： Space-Time Curvature Generalized Gravitation Red-Shift

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一些含三氮杂茂偶氮染料O,N供体的Zr(Ⅱ)配合物的合成、表征和抗微生物活性(英文)

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无机化学学报 2014年第5期30卷 1201-1211页

作者： Supposed by Tanta Univemity. Chemistry Department Faculty of Science Tanta University

合成了9种3-(2-羟基萘基-1-偶氮)-1,2,4-三氮唑(hL1),3-(2,4-二羟苯基-1-偶氮)-1,2,4-三氮唑(hL2),3-(2-羟基-3-羧基萘基-1-偶氮)-1,2,4-三氮唑(hL3),3-(2-羟基-5-溴苯基-1-偶氮)-1,2,4-三氮唑(hL4)和3-(2-羟基-5-甲基苯基-1-偶氮)-1,2,4-1,2,4-三氮唑(hL5)的Zr(Ⅱ)配合物并用元素分析,摩尔电导,磁矩,IR,UV-Vis,1h-NmR以及热分析(TGA和DTA)对其进行了表征。结果表明hL1-hL5以二齿一元配体方式通过偶氮的氮原子和羟基基团的氧原子与Zr(Ⅱ)离子配位生成单核配合物。用4种革兰氏阴性菌,即大肠杆菌(Escherichia coli),粘质沙雷氏菌(Serratia marcescens),阴沟肠杆菌(Enterobacter cloacae)和普通变形杆菌(Proteus vulgaris),以及2种真菌,即白色念珠菌(Candida albicans)和黑曲霉菌(Aspergillus niger)对配体及其配合物的生物学活性进行了研究。最小抑菌浓度(mICs)用纸上杯碟琼脂扩散法测定,结果表明在大多数情况下,金属化的配合物的抗微生物活性与自由配体相比有所增强。

关键词：配位方式生物学活性锆配合物三氮唑偶氮染料光谱表征热分析

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Using the tight binding approximation in deriving the quantum critical temperature superconductivity equation

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Natural Science 2013年第8期5卷 941-946页

作者： R. Abd Elhai m. h. m. hilo R. Abd Elgani m. D. Abd allah Department of Physics Faculty of Science Sudan University of Science and Technology Khartoum Sudan

Superconductivity is one of the most important phenomena in solid state physics. Its theoretical framework at low critical temperature Tc is?based on Bardeen, Cooper and Schrieffer theory (BCS). But at high Tc above 135, this theory suffers from some setbacks. It cannot explain how the resistivity abruptly drops to zero below Tc , besides the explanation of the so called pseudo gap, isotope and pressure effect, in addition to the phase transition from insulating to super-conductivity state. The models proposed to cure this drawback are mainly based on hubbard model which has a mathematical complex framework. In this work a model based on quantum mechanics besides generalized special relativity and plasma physics. It is utilized to get new modified Schr?dinger equation sensitive to temperature. An expression for quantum resistance is also obtained which shows existence of critical temperature beyond which the resistance drops to zero. It gives an expression which shows the relation between the energy gap and Tc . These expressions are mathematically simple and are in conformity with experimental results.

关键词： Superconductivity high Critical Temperature Tight Binding Approximation

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Effect of doping concentration on the performance of solar cell constructed from (muscovite/TiO<sub>2</sub>/Dye/Al)

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Natural Science 2013年第1期5卷 52-56页

作者： R. Abd Elgani m. h. m. hILO A. Al hassan m. D. Abd allah Department of Physics Faculty of Education Al-Zaiem Al-Azhari University Om Durman Sudan Department of Physics Faculty of Science Sudan University of Science and Technology Khartoum Sudan

Solar cells were fabricated from (muscovite/ TiO2/Dye/Al), the effect of temperature, concen- tration and light intensity on the electrical prop- erties of (muscovite/TiO2/Dye/Al) was studied. The relationship between current and voltage was found to be algorism, which is in agreement with the ordinary relation for solar cells. When dye concentration was increased the conductivity, fill factor and efficiency were also increased. This result is found to be in conformity with the theoretical relations. The small energy gaps for their samples show that they are semiconductors. The maximum efficiency obtained is 33.2%.

关键词： Solar Cell Conductivity Fill Factor Efficiency muscovite

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Impact of the light intensity variation on the performance of solar cell constructed from (muscovite/TiO<sub>2</sub>/Dye/Al)

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Natural Science 2013年第10期5卷 1069-1077页

作者： R. Abd Elgani m. h. m. hilo m. D. Abd allah A. Al hassan R. Abd Elhai Department of Physics Sudan University of Science and Technology Khartoum Sudan

In this work, the influence of the light intensity as one of the parameters that control the solar cell is studied. The effect of the other main variables, such as temperature, rotation per minuit of the spin coating instrument, and the samples concentration, was found to be in conformity with other results, but unfortunately the intensity of light does not increase the solar cell efficiency, and fill factor, by other words it was found to play only a secondary role.

关键词： Intensity of Light Solar Cell Efficiency Fill Factor Solar Photovoltaic

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Deriving of the Generalized Special Relativity (GSR) by Using mirror Clock and Lorentz Transformations

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Natural Science 2014年第17期6卷 1275-1281页

作者： m. h. m. hilo R. Abd Elgani R. Abd Elhai m. D. Abd allah Amel A. A. Elfaki Department of Physics Sudan University of Science and Technology Khartoum Sudan Department of Physics Bahri University Khartoum Sudan

Einstein relativity theory shows its high capability of promoting itself to solve the long stand physical problems. The so-called generalized special relativity (GSR) was derived later, using the beautiful Einstein relation between field and space-time curvature. In this work we re-derive (GSR) expression of time by incorporating the field effect in it, and by using mirror clock and Lorentz transformations. This expression reduces to that of (GSR) the previous conventional one, besides reducing to special relativistic expression. It also shows that the speed of light is constant inside the field and is equal to C. This means that the observed decrease of light in matter and field is attributed to the strong interaction of photons with particles and mediates which causes successive absorption and reemission processes that lead to time delay. This absorption process makes some particles appear to move faster than light within the field or medium. This new expression, unlike that of GSR, can describe time and coordinate relativistic expressions for strong as well as weak fields at constant acceleration.

关键词： Lorentz Transformations mirror Clock Space-Time Curvature Gravitational Field

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The endoscopic pneumatic balloon dilation in treating achalasia in a moroccan center

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Open Journal of Gastroenterology 2012年第4期2卷 172-176页

作者： mounia El Yousfi Nada Lahmidani Adil Ibrahimi Dafr-allah Benajah Department of hépato-Gastroenterology University Sidi Mohammed Ben Abdillah Fez Morocco

Aim of the work: Achalasia is a rare pathology whose physiopathogenesis is mysterious. The treatment is based on endoscopic pneumatic dilation (PD) and surgery. The aim of our work is to show our experiment about endoscopic pneumatic dilation as the principal treatment suggested for patients presenting achalasia. material and method: It is a retrospective study relating 21 cases of achalasia indexed between 2002 and 2007. The remission was judged on Eckardt’s clinical criteria. If the symptoms persist after three episodes of PD, there’s a therapy failure and the patients were then proposed to surgery or recurrent DP. The results: The middle Age at the time of diagnosis was of 44 ± 10, 66 years (20 to 76). The sex ratio was 1, 3 (12m?9F) (p = 0.5). The diagnosis of achalasia is based on imaging, endoscopy and manometric arguments. The PD of the cardia was proposed in first intention, except two patients who were treated 6 and 15 years before by surgery. 38 dilations were performed for 21 patients with an average of 1.8 PD per patient [1-6]. The rate of good answers after the third episode of PD was about 90.47% (19 patients). There was no complication of the PD. In plain-varied analysis, no predictive factor of good answers to PD was retained. Conclusion: PD is an effective cure with a negligible morbidity and no mortality. The surgery is reserved for the failures of pneumatic dilation.

关键词： Achalasia Esophagus Treatment Pneumatic Dilation

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Petrology of lherzolite xenoliths of hosséréSédévolcano(Adamawa plateau,Ngaoundéréarea,Cameroon)

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地球化学学报(英文) 2023年第5期42卷 817-831页

作者： O.F.Nkouandou J.m.Bardintzeff Fagny mefire Njankouo Ndassa A.A.Sahabo h.Adama Department of Earth Sciences Faculty of SciencesUniversity of NgaoundereP.O.Box.454NgaoundereCameroon Univ Paris-Saclay Sciences de la TerreVolcanologie-PlanetologieUMR CNRS 8148 GEOPSBat.50491405 OrsayFrance Laboratoire de volcanologie Institut de Recherches Geologique et Minie`reB.P.370BueaCameroon

Numerous mantle xenoliths 6–12 cm in size and sub-angular to rounded in shape occur within mio-Pliocene basanite lavas of the monogenic volcano of hosséréSédé in the Adamawa *** of spinel lherzolite exhibit protogranular,equigranular or porphyroclastic *** chemical analyses show that olivine is highly magnesian(Fo_(88-90)),clinopyroxene crystals are diopside and augite(Wo_(41.6–49.6)En_(45.3–53.7)Fs_(4.2–6.2)),orthopyroxene crystals are enstatite(Wo 1.4–1.5 En_(88.6–89.0)Fs_(9.6–9.9))and spinel crystals are mainly Al-spinel associ-ated to minor *** temperatures and pressures through empirical formulas show that hosséréSédé noliths have equilibrated between 1085 and 1204℃and 1.08 to 1.57 GPa,corresponding to sampling depths of 36 and 52 *** petrographical and mineral chemistry of hosséréSédénoliths evidences the com-plex nature and composition of the subcontinental lithosphere under the Adamawa *** may involve a probable uplift of the whole area after a limited exten-sional event,possible metasomatism through melt infiltration during shearing of the lithospheric mantle along the Pan African strike-slip fault system.

关键词： Cameroon Adamawa hosséréSédé Subcontinental lithosphere Xenolith Peridotite Lherzolite

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