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| 1 | 高球团比下高炉布料的控制和优化显示文摘由于高球团比操作下静止角小、易滚动和料层易坍塌的特性,高炉的煤气分布控制比烧结矿操作更难。而且,较重的球团矿对前面的焦炭层产生一个推动作用,将焦炭层推向妒壁,而球团矿则向中央滚落。中心区高球团比例促使强边缘煤气流的形成,影响料层分布和工艺稳定性。为了获得精确的煤气分布,改变了料仓的出料顺序和高炉上料速率。为避免球团矿在炉内过度地滚动,对矿石和焦炭的下降轨迹进行了监控和优化,以在没有中心区焦炭装料的条件下加强中心煤气流。在球团矿比例高达70~80%的情况下,京德勒钢铁厂1号高炉的利用系数达到2.1t/m^3·d,燃料比下降到570kg/t铁水。 | P.K.Gupta 刘友存(译) | 2010 | 钢铁译文集2010,,2: | 1 |
| 2 | 固体润滑滚珠轴承磨损的模拟显示文摘高速涡轮机中使用的固体润滑滚珠轴承磨损的计算机模拟是依据轴承元件的局部相互作用和综合动态特性考虑的。通过已给出的相互作用的轴承元件之间各个界面的磨损系数,用ADORE计算机模型获取滚珠、座圈和保持架的时间平均磨损牢,它是随典型的燃气轮机工作条件变化的。该模型提供了保持架球兜孔和导向面上磨损的分析评价,为优化固体润滑滚珠轴承保持架的设计提供了一些指导。 | P.K.Gupta N.H.Forster 孙公新 | 1989 | 固体润滑1989,9,4: | 0 |
| 3 | 对印度马德拉斯市污染湿地甲烷排放的人为影响显示文摘湿地是大气中甲烷最大的自然来源。科研人员采用密闭室技术,在一年的时间内对马德拉斯(Madras)市被污染的热带海岸湿地的甲烷排放进行了测量。由于污染程度的差异,使得被观测湿地在甲烷排放上表现出了各自的时空变化特性。硫酸盐和盐度对甲烷产生的抑制作用也是本研究项目的内容。研究发现,土壤温度、沉积物含水量、盐度及硫酸盐是影响甲烷排放率的关键自然因素。研究表明,由于Adyar河口生态系统受到人为扰动,使得该地区平均甲烷排放水平约为15.58mg/m^2·h,这明显高于未污染湿地的同类指标(约6.02mg/m^2·h)。在Adyar河汇入孟加拉湾处,由于受到海水的影响,排放指标明显降低(3.27mg/m^2·h)。 | R.Ramesh G.R.Purvaja D.C.Parashar P.K.Gupta A.P.Mitra 李本纲 | 1997 | 人类环境杂志1997,26,6: | 0 |
| 4 | BINARY TISSUE CLASSIFICATION STUDIES ON RESECTED HUMAN BREAST TISSUES USING OPTICAL COHERENCE TOMOGRAPHY IMAGES显示文摘We report the results of a comparative study of Fourier domain analysis(FDA)and texture analysis(TA)of optical coherence tomography(OCT)images of resected human breast tissues for binary classification between normalabnormal classes and benignmalignant classes.With the incorporation of Fisher linear discriminant analysis(FLDA)in TA for feature extraction,the TA-based algorithm provided improved diagnostic performance as compared to the FDAbased algorithm in discriminating OCT images corresponding to breast tissues with three different pathologies.The specificity and sensitivity values obtained for normalabnormal classification were both 100%,whereas they were 90% and 85%,respectively for benignmalignant classification. | M.BHATTACHARJEE P.C.ASHOK K.DIVAKAR RAO S.K.MAJUMDER Y.VERMA P.K.GUPTA | 2011 | Journal of Innovative Optical Health Sciences2011,4,1: | 0 |
| 5 | Stokes flow of micro-polar fluids by peristaltic pumping through tube with slip boundary condition显示文摘This paper studies the Stokes flow of micro-polar fluids by peristaltic pumping through the cylindrical tube under the effect of the slip boundary condition. The motion of the wall is governed by the sinusoidal wave equation. The analytical and numerical solutions for the axial velocity, the micro-polar vector, the stream function, the pressure gradient, the friction force, and the mechanical efficiency are obtained by using the lubrication theory under the low Reynolds number and long wavelength approximations. The impacts of the emerging parameters, such as the coupling number, the micro-polar parameter, the slip parameter on pumping characteristics, the friction force, the velocity profile, the mechanical efficiency, and the trapping phenomenon are depicted graphically. The numerical results infer that large pressure is required for peristaltic pumping when the coupling number is large, while opposite behaviors are found for the micro-polar parameter and the slip parameter. The size of the trapped bolus reduces with the increase in the coupling number and the micro-polar parameter, whereas it blows up with the increase in the slip parameter. | D.TRIPATHI M.K.CHAUBE P.K.GUPTA | 2011 | Applied Mathematics and Mechanics(English Edition)2011,32,12: | 0 |