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225篇 您的检索式:作者名="Durga"
    题名 作者 年代 出处 被引量
1基于FPDE的红外与可见光图像融合算法显示文摘针对传统红外与可见光图像融合算法中存在的细节信息不够丰富,边缘信息保留不够充分等问题,文中提出了一种基于四阶偏微分方程(Fourth-order partial differential equation, FPDE)的改进的图像融合算法.算法首先采用FPDE将已配准的红外与可见光图像进行分解,得到高频分量和低频分量;然后,对高频分量采用基于主成分分析(Principal component analysis, PCA)的融合规则来得到细节图像,对低频分量采用基于期望值最大(Expectation maximization, EM)的融合规则来得到近似图像;最后,通过组合最终的高频分量和低频分量来重构得到最终的融合结果.实验是建立在标准的融合数据集上进行的,并与传统的和最近的融合方法进行比较,结果证明所提方法得到的融合图像比现有的融合方法能有效地综合红外与可见光图像中的重要信息,有更好的视觉效果.高雪琴 刘刚 肖刚 BAVIRISETTI Durga Prasad 史凯磊 2020自动化学报2020,46,4:18
2不同工质时脉动热管换热特性实验研究显示文摘本文通过实验研究了工质类型和工质充液率对竖直式脉动热管换热特性的影响。采用了去离子水、甲醇和乙醇三种液体作为工质,加热功率为5~80 W。结果表明,脉动热管的换热特性与工质充液率密切相关。当去离子水充液率为50%时,脉动热管内能够形成稳定的气柱和液塞流动,具有最佳的换热表现,获得的最低热阻为80 W加热功率下的0.47K/W。在较小的加热功率下,乙醇和去离子水具有比甲醇更小的热阻,随加热功率增加,采用甲醇时加热段温度上升波动剧烈,而采用去离子水和乙醇时温度上升平缓,具有更好换热效果。甲醇和乙醇做工质时获得的最小热阻分别为80 W加热功率下的0.56 K/W和0.48 K/W。BASTAKOTI Durga 张红娜 李凤臣 2017工程热物理学报2017,38,7:5
3Effect of glycine addition on the in-vitro corrosion behavior of AZ31 magnesium alloy in Hank’s solution显示文摘This study reports on the effect of the addition of Glycine to Hank’s solution on the in-vitro corrosion behavior of AZ31 magnesium(Mg)alloy at 37℃and a pH of 7.4 studied by using potentiodynamic polarization(PDP),hydrogen collecting techniques and electrochemical impedance spectroscopy(EIS)in combination with surface characterization techniques such as optical microscopy(OM),scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS),X-ray diffraction(XRD)and X-ray photoelectron spectroscopy analysis(XPS).The results reveal that adsorption of glycine initially subdues the dissolution of AZ31 Mg alloy while in long run it enhances the dissolution of the alloy due to the commencement of the chelation effect of glycine with Ca^(2+) released from hydroxyapatite.The chelation of glycine with Ca^(2+) induces the formation of cracks in the surface film which further promotes the dissolution of AZ31 Mg alloy thereby forming a porous corrosion products layer on the surface of the alloy.As a result,both the continuous dissolution of AZ31 magnesium alloy and the hydrogen evolution rate(HER)are enhanced with increasing the immersion time in Hank’s solution.Durga Bhakta Pokharel Liping Wu Junhua Dong Amar Prasad Yadav Dhruba Babu Subedi Madhusudan Dhakal Lin Zha Xin Mu Aniefiok Joseph Umoh Wei Ke 2021Journal of Materials Science & Technology2021,,22:4
4Bismuth Modified Porous Silica Preparation,Characterization and Photocatalytic Activity Evaluation for Degradation of Isoproturon显示文摘Porous silica prepared by using an acrylic emulsion has been impregnated with bismuth ion resulting in Bi_2SiO_5 species containing surface.The as-prepared materials have been characterized by X-ray diffraction spectroscopy (XRD),X-ray photoelectron spectroscopy(XPS),UV-Vis diffuse reflectance spectroscopy(UV-Vis DRS), scanning electron microscopy(SEM),energy dispersive analysis of X-ray(EDAX),transmission electron microscopy(TEM),Fourier transform infrared spectroscopy(FTIR) and N_2 adsorption/desorption techniques. EDAX analysis confirms the penetration of bismuth ions into the framework of silica to form Bi_2SiO_5,which is substantiated by XRD.The UV—Vis DRS shows that the catalysts are optically active and XPS confirms the inclusion of bismuth into the framework of silica.FTIR spectra illustrate the formation of Bi—O—Si linkages in the porous silica framework.SEM and TEM show the spherical morphology,whereas N_2 adsorption/desorption study confirms the porosity of the prepared materials.The photocatalytic activity of the material is evaluated for the degradation of isoproturon herbicide and it is found that the material is active as compared to the commercial P-25 Degussa TiO_2.Anil Kumar Reddy Police Srinivas Basavaraju Durga Kumari Valluri Subrahmanyam Machiraju 2013Journal of Materials Science & Technology2013,29,7:4
5Effect of organic silicon quaternary ammonium salts on mitigating corrosion of reinforced steel induced by SRB in mild alkaline simulated concrete pore solution显示文摘The corrosion damage of 20 SiMn steel by sulphate-reducing bacteria(SRB)and the mitigation effect of organic silicon quaternary ammonium salt(OSA)were studied in sterilized mild alkaline simulated concrete pore solution(STR)with different additions of SRB and OSA at pH 9.35 for 28 days.Uniform corrosion occurs in STR medium while slight localized corrosion is observed in STR+OSA medium,and localized pitting corrosion occurs in STR+SRB and STR+SRB+OSA media.The largest pit depth reduces from 36.70μm in STR+SRB medium to 3.31μm in STR+SRB+OSA medium due to the mitigation effect of OSA.The corrosion rate reflected by weight loss and electrochemical impedance spectroscopy(EIS)results presents the order of STRIni-Ibehe Nabuk Etim Junhua Dong Jie Wei Chen Nan Durga Bhakt Pokharel Aniefiok Joseph Umoh Dake Xu Mingzhong Su Wei Ke 2021Journal of Materials Science & Technology2021,,5:3
6Is non-biological treatment of rheumatoid arthritis as good as biologics?显示文摘The management of rheumatoid arthritis(RA) in the past three decades has undergone a paradigm shift from symptomatic relief to a 'treat-to-target' approach. This has been possible through use of various conventional and biologic disease modifying anti-rheumatic drugs(DMARDs) which target disease pathogenesis at a molecular level. Cost and infection risk preclude regular use of biologics in resource-constrained settings. In therecent years, evidence has emerged that combination therapy with conventional DMARDs is not inferior to biologics in the management of RA and is a feasible cost-effective option.Jyoti Ranjan Parida Durga Prasanna Misra Anupam Wakhlu Vikas Agarwal 2015World Journal of Orthopedics2015,6,2:3
7频率医学睡眠对慢性失眠症的治疗作用显示文摘目的:探讨'频率医学睡眠'治疗慢性失眠症的疗效.方法:选取2019 年5-7 月在原乡奥伦达医学博物馆高端医学门诊就诊的慢性失眠症患者15 例作为研究对象,应用'频率医学睡眠',包括Healy微电刺激、睡眠扑满SleepBank、Tim-eWaver时光波量子仪多维干预及精油芳香疗愈.治疗1 周,治疗前后采用匹兹堡睡眠质量指数量表(PSQI)评定临床疗效.结果:PSQI睡眠质量分别为(2.17 ±0.58)和(1.33 ±0.65);睡眠时间分别为(1.58 ±0.90)和(0.67 ±0.49);匹兹堡问卷总分分别为(9.92 ±1.56)和(7.17 ±2.48),以上差异均具有统计学意义(P均<0.05).结论:频率医学睡眠能够改善慢性失眠症患者的睡眠质量、增加睡眠时间.曹彬彬 刘宇航 梁正贤 Durga Dass 王春梅 陈同欣 2020世界睡眠医学杂志2020,7,1:3
8Effect of applied potential on the microstructure, composition and corrosion resistance evolution of fluoride conversion film on AZ31 magnesium alloy显示文摘AZ31 magnesium(Mg) alloy was potentiostatic polarized in 0.1 M deaerated KF solution with pH 7.5 from-0.4 V to-1.4 V with an interval of-0.2 V. The polarization process was described by the potentiostatic current decay. The resultant film was analyzed by scanning electron microscopy(SEM), X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS) and electrochemical impedance spectroscopy(EIS). The results demonstrated that the deposited film included a Mg(OH)_2/MgF_2 containing inner layer and a Mg(OH)-2/MgF_2/KMgF_3 comprising outer layer. The high polarized potential produced high content of MgF_2 but low content of KMgF_3 and thin film. Conversely, the low polarized potential produced small content of MgF_2 but high content of KMgF_3 and thick film. The optimal corrosion resistance of the deposited film was obtained at-1.4 V, which was closely related with the content of MgF_2 and KMgF_3 and the film thickness.Liping Wu Changgang Wang Durga Bhakta Pokharel Ini-Ibehe Nabuk Etim Lin Zhao Junhua Dong Wei Ke Nan Chen 2018Journal of Materials Science & Technology2018,34,11:3
9CURING KINETICS AND THERMAL STABILITY OF EPOXY BLENDS CONTAINING PHOSPHOROUS-OXIRANE WITH AROMATIC AMIDE-AMINE AS CURING AGENTS显示文摘这篇文章把一系列芳香的酰胺胺和他们的潜在的使用的合成描述为环氧基树脂 hardeners。这些胺被 L 本氨基丙酸(PA ) 的反应与不同结构的肼综合即 1,4 苯撑肼(PD ) , 1,5-diamino 萘(N) , 4,4-(9-fluorenyllidene )-dianiline (F) , 4,4-diaminodiphenyl 硫醚(DS ) 和在 stoichiometric 比率(1:1 ) 的 3,4-oxydianiline (O) 。综合酰胺胺的结构的描述用完了元素的分析和分光镜的技术 viz 的帮助。英尺红外, 1H-NMR 和 13C-NMR。环氧基树脂混合被混合 tris (glycidyloxy ) 准备有常规环氧基树脂的磷化氢氧化物(TGPO ) 即 bisphenol 的 diglycidyl 醚 -- 在 2:3 的相等的比率的 A (DGEBA ) 合并进主要的链磷。有综合芳香的酰胺胺的环氧基树脂混合的治好的动力学被非等温的 DSC 技术使用多重加热调查率方法(5, 10, 15 和 20 K/min.) 。激活精力被适合试验性的数据进基辛格和 Ozawa 运动模型决定。通过 Ozawa 方法获得的激活精力比基辛格方法的那些稍微高,但是是可比较的。然而,两个都,精力被发现依赖于胺的结构。热稳定性和等温地治好的 thermosets 的重量损失行为也在氮空气用 thermogravimetric 分析(TGA ) 被调查。所有样品比把仅仅胺用作 hardeners 以字符产量显示出改进热稳定性。Geeta Durga A.K.Narula 2012Chinese Journal of Polymer Science2012,30,5:2
10Synthesis of N-substituted-2-aminobenzothiazoles using nano copper oxide as a recyclable catalyst under ligand-free conditions in reusable PEG-400 medium显示文摘A simple and practical method for the synthesis of N-substituted-2-aminobenzothiazoles via a crosscoupling reaction of 2-iodo anilines with isothiocyanates is envisaged using nano copper oxide as a recyclable catalyst and Cs2CO3as a base in PEG-400,as a bio-degradable,reusable,inexpensive and nontoxic reaction medium,under ligand-free conditions.The present tandem process underlines environmental acceptability to access a wide range of N-substituted-2-aminobenzothiazoles in good to excellent yields.Satish Gaddam Harshavardhan Reddy Kasireddy Karnakar Konkala Ramesh Katla Nageswar Yadavalli Venkata Durga 2014Chinese Chemical Letters2014,25,5:2
11Curcuma angustifolia ameliorates carbon tetrachloride-induced hepatotoxicity in HepG2 cells and Swiss albino rats显示文摘Objective:To determine the antioxidant and hepatoprotective potential of methanol extract of rhizome of Curcuma angustifolia(MECA)against carbon tetrachloride(CCl4)-induced hepatic damage in vitro and in vivo.Methods:DPPH,ABTS and reducing power assays were performed to estimate the antioxidant effect of MECA.In vitro cytotoxicity of MECA against HepG2 cells was evaluated,whereas serum biochemical parameters and levels of antioxidative enzymes were measured in vivo and in vitro.Additionally,histopathological studies were estimated in order to investigate the hepatoprotective efficacy of MECA.Furthermore,GC-MS analysis of the extract was performed to identify the chemical components.Results:MECA exhibited strong antioxidant activity and attenuated CCl4-induced decrease in the viability of HepG2 cells.Additionally,MECA significantly restored the ALT,AST,ALP,TP and albumin level in comparison with the CCl4 group.After pre-treatment with MECA,effects of SOD,CAT and GSH were increased as well as lipid peroxidation amount decreased on CCl4-induced hepatotoxicity in in vitro and in vivo model.Furthermore,histopathological observation confirmed that MECA reduced liver injury induced by CCl4 in rats.GC-MS analysis confirmed the presence of bioactive constituents such as α-tocopherol(12.27%),phytol(7.61%),squalene(3.71%),β-sitosterol(2.19%),eugenol(2.59%),curcumenol(1.20%),β-elemene(1.00%)and eucalyptol(0.89%).Conclusions:MECA contains antioxidant and hepatoprotective constituents such asα-tocopherol,phytol,squalene and eugenol and exerts hepatoprotective effect both in vitro and in vivo.Sudipta Jena Asit Ray Diptirani Rath Ambika Sahoo Subhashree Singh Noohi Nasim Durga Madhab Kar Sanghamitra Nayak 2019Asian Pacific Journal of Tropical Medicine2019,12,9:2
12Selenium – an antioxidative protectant in soybean during senescence显示文摘M. Djanaguiraman D. Durga Devi Arun K. Shanker J. Annie Sheeba U. Bangarusamy 2005Plant and Soil2005,,1:2
13Weight Loss During Radiotherapy for Head and Neck Malignancies: What Factors Impact It?显示文摘Anusheel Munshi Manish Bhushan Pandey Tarun Durga Kailash Chander Pandey Sudhir Bahadur Bidhu Kalyan Mohanti 2003Nutrition and Cancer2003,,2:2
14针对稳定和不稳定二阶时滞过程的IMC-PID控制器的性能改进设计(英文)显示文摘针对不稳定二阶时滞系统,提出了一种具有逆响应(RHP零)特性的IMC-PID控制器。通过Ms和λ图计算合适的调优参数λ,使性能和鲁棒性之间达到平衡。从文献中选取了六种不同形式的过程模型,说明了该方法的适用性。通过ITAE和总变差TV计算控制器的性能,并与最近发布的调优规则进行比较。通过使用设置点加权参数来消除不必要的超调。通过对各模型参数进行摄动,验证了控制器的鲁棒性。闭环控制结果表明,所设计的控制器在模型不确定性条件下具有较强的鲁棒性。与其他最近报道的方法相比,该方法具有更好的闭环响应。Munna KUMAR Durga PRASAD Ram Sharan SINGH 2020Journal of Central South University2020,27,1:2
15Impact of increased penetration of DFIG-based wind turbine generators on transient and small signal stability of power systems显示文摘Gautam Durga Vittal Vijay Harbour Terry 2009IEEE Trans on Power Systems2009,24,3:1
16Weight loss during radiotherapy for head and neck malignancies: what factors impact it?显示文摘Munshi A Pandey MB Durga T 2003Nutr Cancer2003,47,2:1
17Correlation of activity and stability of CuO/ZnO/Al2O3 methanol steam reforming catalysts with Cu/Zn composition obtained by SEM-EDAX analysis显示文摘Durga K V Subrahmanyam M Ratnamala A 2002Catalysis Communications2002,4,3:1
18Study of flow over side weirs under supercritical conditions 显示文摘K H V Durga Rao'C R S Pillai 2008Water Resour Manage2008,22,:1
19Immobilized Fe ( Ⅲ)-HY: an efficient and stable photo-Fenton catalyst显示文摘Noorjahan M Durga Kumari V Subrahmanyam M 2005Applied Catalysis B: Environmental2005,57,4:1
20Interfacial properties and foam stability effect of novel gemini-type surfactants in aqueous solutions显示文摘Durga P Acharya José M Gutiérrez 2005Journal of Colloid and Interface Science2005,291,:1
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