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| 1 | ON A BI-HARMONIC EQUATION INVOLVING CRITICAL EXPONENT: EXISTENCE AND MULTIPLICITY RESULTS显示文摘In this paper, we consider the problem of existence as well as multiplicity results for a bi-harmonic equation under the Navier boundary conditions: △2 u = K(x)u p , u > 0 in Ω , △u = u = 0 on Ω , where Ω is a smooth domain in R n , n 5, and p + 1 = 2 n n 4 is the critical Sobolev exponent. We obtain highlightly a new criterion of existence, which provides existence results for a dense subset of positive functions, and generalizes Bahri-Coron type criterion in dimension six. Our argument gives also estimates on the Morse index of the obtained solutions and extends some known results. Moreover, it provides, for generic K, Morse inequalities at infinity, which delivers lower bounds for the number of solutions. As further applications of this Morse theoretical approach, we prove more existence results. | Zakaria Boucheche Ridha Yacoub Hichem Chtioui | 2011 | Acta Mathematica Scientia2011，31，4： | 4 |
| 2 | Through converting the surface complex on TiO_(2) nanorods to generate superoxide and singlet oxygen to remove CN^(−)显示文摘Cyanide(CN−)is extensively used in the process of plating devices and for surface treatment in the electroplating industry and is extremely hazardous to humans and the environment.Peroxymonosulfate(PMS)-based advanced oxidation processes(AOPs)hold considerable promise for CN−removal.However,the activity of sulfate radical and hydroxyl radical generated in the PMS activation process is low in the base condition,leading to a drop in its efficiency in CN−removal.Thus,a photo-electrocatalytic system(PEC),developed using a TiO_(2) photoanode and a carbon aerogel cathode,was used to activate PMS for the removal of CN−from wastewater through the generation of radicals and non-radicals.The PEC/PMS system could effectively remove CN^(−),with the removal efficiency reaching 98.5%within 2 min,when PMS concentration was at the 0.25 mmol/L level,and the applied bias voltage was-0.5 V.The main active species in the PEC/PMS system were superoxide radicals and singlet oxygen,which was proved through electron paramagnetic resonance detection and quenching experiments.Results obtained through in-situ Raman measurements,photocurrent tests,and electrochemical impedance spectroscopy measurements indicated that the TiO2 could activate PMS to generate active species.Following many cycles of experimentation,it was discovered that the system displayed high catalytic performance and possessed satisfactory stability to remove CN−economically and efficiently. | Laiqi Zhang Ridha Djellabi Peidong Su Yan Wang Jianling Zhao | 2023 | Journal of Environmental Sciences2023，，2： | 4 |
| 3 | ACTIVE VIBRATION SUPPRESSION VIA LINEARIZING HYSTERESIS OF PIEZOCERAMIC ACTUATORS显示文摘一种新奇活跃颤动控制技术根据线性化的压电的致动器被介绍。由到哪个是的一根伸臂横梁组成的一台试验性的仪器依附种类补丁和 piezoceramic 致动器被用于活跃颤动抑制被描述。伸臂的一个动态模型用 Lagrange 的方程微笑,二个坐标系统被介绍。基于 Lyapunov 的直接方法,有磁滞现象赔偿的一个活跃颤动控制器被设计。控制器被设计以便它保证全面系统的全球稳定性。开发的控制器试验性地被估计。 | HU Hong SHI Hongyan BEN MRAD Ridha | 2007 | Chinese Journal of Mechanical Engineering2007，20，4： | 3 |
| 4 | 单层ZIF67纳米颗粒修饰的C3N4在可见光下光催化降解有机污染物显示文摘随着全球工业化水平的提高,有机污染物引起的水环境问题也日益严重.针对有机污染物表现出的持久性和难降解性等问题,全球科研工作者提出了不同的方法去治理相关环境问题.其中利用光催化降解有机污染物作为一种新兴技术,因处理成本低、污染物降解效率高、光催化剂可回收利用等优点受到越来越多的关注.在诸多的光催化剂中,氮化碳(C3N4)拥有2.7 eV的能带宽度,且其合成简单,价格低廉,环境友好,以及在可见光下即可催化降解污染物等特点而被广泛研究.但是,比表面积小和易与光激发电荷载流子结合等缺点也制约C3N4的广泛应用.针对上述问题,本文将具有巨大比表面积的金属骨架材料ZIF67引入到C3N4之中,合成了均匀分布的单层ZIF67衍生的C3N4(ZIF67-C3N4),并将其应用于可见光下的亚甲基蓝(MB)光催化降解.结果表明,所制得的ZIF67-C3N4的最大比表面积可达541.392 m^2/g,远高于未加工的C3N4的97.291 m^2/g.ZIF67-C3N4光催化活性结果表明,2.57 g ZIF67和0.3 g C3N4即ZIF67-C3N4(0.3)表现出优异的光催化活性.加入0.01 g的ZIF67-C3N4(0.3)可以在70 min内降解90%以上的浓度为10 mg/L的亚甲基蓝,而原C3N4在同等条件下处理相同浓度的亚甲基蓝所需的时间超过140 min.同时,本文还考察了溶液的pH值,亚甲基蓝的初始浓度和ZIF67-C3N4复合材料中C3N4的含量等因素对亚甲基蓝光催化降解的影响.结果显示,ZIF67-C3N4(0.3)在碱性条件下降解亚甲基蓝的效率高于中性条件.在pH=12的情况下,ZIF67-C3N4(0.3)可以在10 min内完全降解100 mL的浓度为10 mg/L的亚甲基蓝.此外,在酸性条件下亚甲基蓝的降解效果很差,说明ZIF67-C3N4(0.3)在酸性条件下容易失活.通过对亚甲基蓝初始浓度对光催化反应的研究显示,当亚甲基蓝的初始浓度为20 mg/L时,经140 min反应后,亚甲基蓝的去除率小于90%;当亚甲基蓝的浓度降至15 mg/L时,其在120 min的降解效率超过92%;而10 mg/L的亚甲基蓝可在120 min内完全降解.对制备的五种催化剂对亚甲基蓝的降解效果分析得出ZIF67-C3N4(0.3)比其他四种催化剂的效果更好.为了揭示ZIF67-C3N4(0.3)在可见光条件下催化降解亚甲基蓝的反应机理,本文利用叔丁醇、甲酸以及对苯醌进行淬灭实验.结果表明,光致空穴(h^+)和超氧自由基(O2-·)是降解亚甲基蓝的主要活性物质. | 苏佩东 张俊珂 肖轲 赵燊 Ridha Djellabi 李学伟 杨波 赵旭 | 2020 | Chinese Journal of Catalysis2020，41，12： | 3 |
| 5 | Robust control based on the Lyapunov theory of a grid-connected doubly fed induction generator显示文摘 | Ridha CHEIKH Arezki MENACER Said DRID | 2013 | Frontiers in Energy2013，7，2： | 2 |
| 6 | Thermal performance of cooling strategies for asphalt pavement: A state-of-the-art review显示文摘Asphalt pavements absorb and store more heat than natural surfaces. Thus, high temperatures are emitted from conventional asphalt pavements, subsequently releasing heat into the atmosphere and contributing to the urban heat island(UHI) phenomenon. Several cool pavement strategies, including the provision of additives and materials, surface coating and layer design, have been introduced to reduce the impact of UHI. This article provides a detailed review of the thermal properties of these mitigation measures in the context of cool asphalt pavements. The literature can be divided into three segments. The first segment discusses the impact of pavements on UHI and heat transfer mechanisms in pavements. The second segment focuses on various thermo physical properties that play an important role in mitigation measures;these properties include albedo(a), emissivity(e),solar reflective index, thermal conductivity(k), specific heat capacity(Cp) and thermal diffusivity. The third segment discusses cool asphalt pavement strategies which specifically cover the ability of the pavement to absorb and reflect solar energy on the basis of the materials and treatments used. The literature reveals that cooling strategies that deal with the pavement surface are important due to its direct incident solar effect, which depends on surface colour, material, shape and roughness. By using high-albedo and high-emissivity surfaces, the pavement can store less heat and lower the surface temperature. These results can also be achieved by designing the materials and pavement layers with low thermal conductivity and high specific heat capacity to reduce thermal diffusivity and pavement temperature and thus combat the heat radiated by the asphalt pavement. | Salam Ridha Oleiwi Aletba Norhidayah Abdul Hassan Ramadhansyah Putra Jaya Eeydzah Aminudin Mohd Zul Hanif Mahmud Azman Mohamed Ahmed Abdulameer Hussein | 2021 | Journal of Traffic and Transportation Engineering(English Edition)2021，8，3： | 2 |
| 7 | Effect of different brood stock densities on the reproductive performance of Nile tilapia(Oreochrornis niloticus) in recycling system显示文摘 | RIDHA M T CRUZ E M | 1999 | Aquaculture Re search1999，30，： | 1 |
| 8 | Computation of stress, strain and deformations of tires显示文摘 | RIDHA R A | 1980 | Rubber Chemistry and Technology1980，53，4： | 1 |
| 9 | Genotoxicity of the Organochlorine Pesticides 1,1-Dichloro-2,2-bis (p-chlorophenyl) ethylene (DDE) ~and hexachlorobenzene ( HCB ) in Cultured Human Lymphocytes 显示文摘 | Ennaceur S Ridha D Marcos R | 2008 | Chemosphere2008，71，7： | 1 |
| 10 | A piezoactuated droplet-dispensing microfluidic chip显示文摘 | MOHAMMED J A SERGEY I G RIDHA B M | 2010 | Journal of Microelectromchannical Systems2010，19，1： | 1 |
| 11 | Screening tilapia for culture in sea water in Kuwait 显示文摘 | Hopkins K D Ridha M Leclercq D | 1989 | Aquaculture Research1989，20，4： | 1 |
| 12 | Improving the adhesion properties of polypropylene using a liquid-phase sulfonation treatment显示文摘 | Ridha Ben Cheikh Per A. Askeland Richard L. Schalek Lawrence T. Drzal | 2002 | Journal of Adhesion Science and Technology2002，，12： | 1 |
| 13 | 仓鼠卵的超低温冷冻和解冻后的体外受精显示文摘 | 范必勤 Ridha M.T Dukelow W.R. | 1985 | 江苏农业学报1985，，01： | 1 |
| 14 | Fault and attack management in all-optical networks显示文摘 | Ridha Rejeb Mark S Leeson Roger J Green | 2006 | IEEE Communications Magazine2006，44，11： | 1 |
| 15 | Evaluation of Two-Equation Turbulence Modles for Predicting Transitional Flows显示文摘 | Abid Ridha | 1993 | International Journal of Engineering Science1993，31，6： | 1 |
| 16 | Computation of stresses, strains, and deformations of tires显示文摘 | Ridha R A | 1980 | Rubber Chemistry and Technology1980，53，4： | 1 |
| 17 | Evolution of the fatty fraction during co-composting of olive oil industry wastes with animal manure: Maturity assessment of the end product显示文摘 | Ridha Hachicha Salma Hachicha Imen Trabelsi Steve Woodward Tahar Mechichi | 2009 | Chemosphere2009，，10： | 1 |
| 18 | HIV virions and HIV replication are unaffected by granulysin显示文摘 | Ridha S Levy JA | 2000 | AIDS2000，14，3： | 1 |
| 19 | Application of an expert system to optimize reservoir performance显示文摘 | | 2005 | Journal of Petroleum Science and Engineering2005，49，： | 1 |
| 20 | Multiobjective optimization of a linear Delta parallel robot显示文摘 | Ridha Kelaiaia Olivier Company Abdelouahab Zaatri | | 0，，： | 1 |
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