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256篇 您的检索式:作者名="R.G."
    题名 作者 年代 出处 被引量
1Krebs g Max旋流器在煤炭工业中的成功应用显示文摘通过调整旋流器圆筒长度、优化锥角和改进沉砂口几何参数 ,KrebsgMax型旋流器的分级粒度比常规旋流器的分级粒度要细得多 ,同时在分级粒度相同时可用较大尺寸的gMax型旋流器对较高浓度的矿浆进行分级。gMax型旋流器除了处理量高外 ,还可降低错误进行溢流中的粗颗粒的数量。这种新型旋流器设计可使大直径旋流器以较低的给料压力工作。在实验室和现场对这种新的 gMax型旋流器的这些特性进行了广泛试验 ,接着确定了半自磨闭路中的最佳操作模式 ,并将这种旋流器扩大用于选煤厂中。本文报导了R.G.莫雷希德 崔洪山 李长根 2003国外金属矿选矿2003,40,11:13
2大力种植香根草保持水土显示文摘香根草(Vetiveria zizanioides)又叫岩兰草,是生长在热带地区的十几种主要牧草之一,它已被证明是一种理想的水保植物 香根草是株从紧密、从生、无芒、坚韧、叶面平滑的多年生草本植物。香根草不能授粉,也不能结籽,没有根茎,没有匍匐茎,依靠根段和截枝无性繁殖。根呈网状,海绵状须根,上面着生0.5~1.5m高的直立中空茎。叶剑形,较硬,狭长,长约75cm,宽8mm以下,光滑,但边缘有锯齿状凸起 花为圆锥花序,周长15~30cm,细尖紧密。R.G.格里姆肖 王保荣 牛四平 1990中国水土保持1990,,5:9
3Removal of PCDD/Fs and PCBs from sediment by oxygen free Pyrolysis显示文摘Few studies have dealt on the evaluation of volatilization and decomposition reactions of dioxins from sediment by oxygen free pyrolysis. In this study, the performance of pyrolysis on the removal of dioxins from sediment was investigated. Dioxin concentrations of the raw sediment and the solid residues after pyrolysis were analyzed at different conditions. Results showed a removal efficiency of 99.9999% for total dioxins at 800℃ and retention time of 30 min. All the polychlorinated dibenzo-furans (PCDFs) have been removed and were not formed in the solid residues at the retention time range of 30—90 min at 800℃. Close to 100% removal of polychlorinated dibenzo-p-dioxins(PCDDs) was also achieved. Only trace PCDDs were detected in the solid yields at a retention time of 60 min. The highest removal efficiency of polychlorinated biphenyls (PCBs) was more than 99.9994% at a retention time of 30 min. During cooling period following pyrolysis, however, the concentration of total dioxins in solid residues increased 130 times as compared to that of the raw sediment under air atmosphere. This confirmed that some complex reactions do occur to form PCDD/Fs and PCBs from 800 to 400℃ in the presence of oxygen. Oxygen-free atmosphere therefore can prevent formation of dioxin during thermal process thus generating clean solid residues.HU Zhan-bo Saman Wijesekara R.G. Ronald R. Navarro WU De-yi ZHANG Da-lei Masatoshi Matsumura KONG Hai-nan 2006Journal of Environmental Sciences2006,18,5:6
4Experimental study on start-up characteristics of loop heat pipes显示文摘This paper presents results of ground-experimental study on the start-up characteristics of a Loop Heat Pipe. The physical process of start-up is described, and the explanation that “Pressure Transfer” leads to the saturated temperature rise in compensation chamber during start-up is first discussed. Start-up behaviors as a function of various parameters including vapor/liquid distribution in the evaporator, adverse elevation, start-up heat load, sink temperature are described and explained. A peculiar start-up phenomenon composed of two start-up scenarios was first observed at adverse elevations and is described.R.G. Sudakov Yu. F. Maidanik 2005Science China(Technological Sciences)2005,48,2:5
5Effects of two medicinal plants Psidium guajava L. (Myrtaceae) and Diospyros mespiliformis L. (Ebenaceae) leaf extracts on rat skeletal muscle cells in primary culture显示文摘Crude decoction, aqueous and ethanolic extracts of two medicinal plants (Psidium guajava and Diospyros mespili- formis), widely used in the central plateau of Burkina Faso to treat many diseases were evaluated for their antagonistic effects on caffeine induced calcium release from sarcoplasmic reticulum of rat skeletal muscle cells. These different extracts showed a decrease of caffeine induced calcium release in a dose dependent manner. Comparison of the results showed that Psidium guajava leaf extracts are more active than extracts of Diospyros mespiliformis and that crude decoctions show better inhibitory activity. The observed results could explaine their use as antihypertensive and antidiarrhoeal agents in traditional medicine, by inhibiting intracellular calcium release.BELEMTOUGRI R.G. CONSTANTIN B. COGNARD C. RAYMOND G. SAWADOGO L. 2006Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)2006,7,1:4
6世代政治学R.G.布朗加特 M.M.布朗加特 孙嘉明 李国海 1994现代外国哲学社会科学文摘1994,,12:3
7西方欠中国的“债”显示文摘人所未知的最大历史秘密之一是:我们生活的“现代世界”是中国和西方种种成分的独特综合而成的。“现代世界”赖以建立的基本创造发明和发现可能有多一半来自中国。但是却很少有人知道这一点。为什么? 中国人自己和西方人一样也不知道这一事实。17世纪以来,中国人一度忘记了他们自己的重大成就,日益为欧洲的科技发展而目眩。当耶稣会传教士给中国人看机械制的钟时,他们充满敬畏。他们竟忘记了第一个发明机制钟的是他们自己。西方人和中国人一样感到十分惊奇。R.G.坦普尔 孟庆时 1992世界哲学1992,,3:3
8六相输电线路继电保护系统分析显示文摘介绍了世界上首条正式投运的六相输电线路(Goudey变电站~Oakdale变电站)的继电保护系统在1993年冬季事故中的动作过程。A.P.阿波斯托洛夫 R.G.那佛斯别格尔 林敏 张莲梅 2001华中电力2001,14,6:3
9Ultrasound-assisted microfeeding of fine powders显示文摘Ultrasonic microfeeding of powders is a new and promising method for use in solid freeforming and pharmaceutical dosing. In this work, computer-controlled microfeeding systems using ultrasonic vibration of a capillary were built. A wide range of controlled, stable rates of flow and switching control were achieved in the acoustic vibration system and uniform powder doses were obtained in the ultrasonic system. Experimental results show that nozzle diameter, transmission fluid depth, waveform, voltage amplitude, frequency and oscillation duration all influence the dose mass. Among these factors, nozzle diameter, voltage amplitude and oscillation duration can be best used to control the dose mass. An artificial neural network (ANN) technique was applied to predict the dose mass. Based on these research results, four types of microfeeding were proposed.Xuesong Lu Shoufeng Yang Julian R.G. Evans 2008Particuology2008,6,1:2
10Numerical Solution of Constrained Mechanical System Motions Equations and Inverse Problems of Dynamics显示文摘In this paper the method of design of kinematical and dynamical equations of mechanical systems, applied to numerical ealization, is proposed. The corresponding difference equations, which are obtained, give a guarantee of computations with a given precision. The equations of programmed constraints and those of constraint perturbations are defined. The stability of the programmed manifold for numerical solutions of the kinematical and dynamical equations is obtained by corresponding construction of the constraint perturbation equations. The dynamical equations of system with programmed constraints are set up in the form of Lagrange’s equations in generalized coordinates. Certain inverse problems of rigid body dynamics are examined.R.G. Muharliamov (Russian Peoples’ Friendship University, 117198, Moscow, Mikluho Maklaya,6,Russia.) 2001应用数学2001,14,2:2
11Culture expanded canine mesenchymal stem cells possess osteochondrogenic potential in vivo and in vitro显示文摘S. Kadiyala R.G. Young M.A. Thiede S.P. Bruder 1997Cell Transplantation1997,,2:2
12生物活性土壤中的管道覆盖层性能评价显示文摘给出了聚乙烯缠带、FBE覆盖层和挤出聚乙烯覆盖层在空气、水、粘土、沙土环境中的剥离性能试验结果,提出了导致覆盖层损坏的原因,建立了覆盖层抗微生物降解性能的试验方法。采用埋在实际土壤后进行阴极剥离测试的方法对覆盖层性能进行了分级,对阴极剥离敏感性从大到小的顺序为FBE、挤出聚乙烯和聚乙烯缠带。阴极剥离试验证明:在埋入含有产酸(APB)和硫酸盐还原菌(SRB)的粘土后,覆盖层较易剥离。Jack T.R.Van Boven G. Wilmott M. Worthingham R.G. 辛勇 1997油气储运1997,16,9:2
13与抗烯醇化酶抗体有关的类肿瘤性和自身免疫性视网膜病的临床及电生理特征Weleber R.G. Watzke R.C. Shults W.T. 司冰心 2005世界核心医学期刊文摘(眼科学分册)2005,0,9:2
14恩替卡韦与拉米夫定治疗HBeAg阳性慢性乙型肝炎的比较显示文摘Background:Entecavir is a potent and selective guanosine analogue with significant activity against hepatitis B virus(HBV).Methods:In this phase 3,double-blind trial,we randomly assigned 715 patients with hepatitis B e antigen(HBeAg)positive chronic hepatitis B who had not previously received a nucleoside analogue to receive either 0.5 mg of entecavir or 100 mg of lamivudine once daily for a minimum of 52 weeks.The primary efficacy end point was histologic improvement(a decrease by at least two points in the Knodell necro-inflammatory score,without worsening of fibrosis)at week 48.Secondary end points included a reduction in the serum HBV DNA level,HBeAg loss and seroconversion,and normalization of the alanine aminotransferase level.Results:Histologic improvement after 48 weeks occurred in 226 of 314 patients in the entecavir group(72 percent)and 195 of 314 patients in the lamivudine group(62 percent,P=0.009).More patients in the entecavir group than in the lamivudine group had undetectable serum HBV DNA levels according to a polymerase-chain-reaction assay(67 percent vs.36 percent,P< 0.001)and normalization of alanine aminotransferase levels(68 percent vs.60 percent,P=0.02).The mean reduction in serum HBV DNA from baseline to week 48 was greater with entecavir than with lamivudine(6.9 vs.5.4 log on a base-10 scale copies per milliliter,P < 0.001).HBeAg seroconversion occurred in 21 percent of entecavir-treated patients and 18 percent of those treated with lamivudine(P=0.33).No viral resistance to entecavir was detected.Safety was similar in the two groups.Conclusions:Among patients with HBeAg-positive chronic hepatitis B,the rates of histologic,virologic,and biochemical improvement are significantly higher with entecavir than with lami vudine.The safety profile of the two agents is similar,and there is no evidence of viral resistance to entecavir.Gish R.G. 王晓君 2006世界核心医学期刊文摘(胃肠病学分册)2006,2,9:2
15Hypertonic resuscitation of hemorrhagic shock prevents alveolar macrophage activation by preventing systemic oxidative stress due to gut ischemia/reperfusion显示文摘K.A. Powers J. Zurawska K. Szaszi R.G. Khadaroo A. Kapus O.D. Rotstein 2005Surgery2005,,1:2
16Microstructure, microchemistry and environmental cracking susceptibility of friction stir welded 2219-T87显示文摘C.S. Paglia R.G. Buchheit 2006Materials Science & Engineering A2006,,1:2
17Bank privatization in developing countries: A summary of lessons and findings显示文摘George R.G. Clarke Robert Cull Mary M. Shirley 2005Journal of Banking and Finance2005,,:2
18Improved multilayered antimicrobial alginate-based edible coating extends the shelf life of fresh-cut watermelon ( Citrullus lanatus )显示文摘R.E. Sipahi M.E. Castell-Perez R.G. Moreira C. Gomes A. Castillo 2013LWT - Food Science and Technology2013,,1:2
19Internationalization in retailing: modeling the pattern of foreign market entry显示文摘Geir Gripsrud Gabriel R.G. Benito 2005Journal of Business Research2005,,12:2
20A look in the corrosion of aluminum alloy friction stir welds显示文摘C.S. Paglia R.G. Buchheit 2007Scripta Materialia2007,,5:2
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