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1432篇 您的检索式:作者名="ALAVI"
    题名 作者 年代 出处 被引量
1知识管理和知识管理系统:概念基础和研究课题显示文摘知识是一个广泛而抽象的概念——早在古希腊时代,西方哲学已经使用这一概念来界定认识论上的争议。然而,在最近的几年,越来越多的学者倾向于将知识视为一种重要的组织资源。信息系统研究人员顺应了组织知识和知识管理的发展趋势,在信息系统的基础上发展出了知识管理系统(KMS)。知识管理系统的目标是支持组织中知识的创造、转移和应用。知识和知识管理是复杂多面的概念,因此,从已有的丰富文献中,挖掘并找到知识管理的理论基础,这将对知识管理系统的有效开发和应用提供支撑。更确切地说,知识管理系统应该以相关领域现有的重要文献为基础展开研究。本文回顾并解释了不同领域中有关知识管理的理论文献,同时确定了重要的研究领域。我们提出了一个详细的组织知识管理的过程观点,并重点关注了信息技术在知识管理过程中的潜在作用。依据文献回顾和知识管理过程的分析,我们围绕知识管理过程和信息技术在该过程中的支持作用讨论几个重要的研究课题。Maryam Alavi Dorothy E. Leidner 郑文全(译) 2012管理世界2012,28,5:68
2Commercially available probiotic drinks containing Lactobacillus casei DN-114001 reduce antibiotic-associated diarrhea显示文摘AIM:To investigate the effect of Lactobacillus-containing commercially available probiotic formulations in Germany during antibiotic treatment with an analysis of cost-efficiency.METHODS:In an observational study,we analyzed the frequency of bowel movements from 258 patients with infections in a primary care hospital in western Germany;107 of the patients were offered a probiotic drink containing at least 10 billion cultures of Lactobacillus casei DN 114001 b.i.d.The economic analysis was based on the costs of patient isolation vs preventive intake of probiotics.In a second pilot study,two commercially available probiotic drinks with different Lactobacillus casei strains were directly compared in 60patients in a randomized controlled fashion.RESULTS:In the first study,the incidence of antibioticassociated diarrhea(AAD)was significantly reducedin the intervention group(6.5%vs 28.4%),and the duration of AAD in days was significantly shorter(1.7±1.1 vs 3.1±2.1).Higher age and creatinine and lower albumin were identified as risk factors for AAD.Ampicillin was the antibiotic with the highest rate of AAD(50%)and with the greatest AAD reduction in the probiotic group(4.2%,relative risk reduction 92%).The economic analysis showed a cost advantage of nearly60000€/year in a department of this size.The second study confirmed the preventive effect of the drink with Lactobacillus casei DN114001;however,there were no advantages found for the other tested probiotic drink containing Lactobacillus casei Shirota.CONCLUSION:In contrast to a drink containing Lactobacillus casei Shirota,a commercially available probiotic drink containing Lactobacillus casei DN 114001 costefficiently reduces the prevalence of AAD during antibiotic treatment.Christoph G Dietrich Tanja Kottmann Manuela Alavi 2014World Journal of Gastroenterology2014,20,42:14
3^(18)F-FDG PET显像对不同亚型淋巴瘤的诊断价值显示文摘目的 探讨1 8F 脱氧葡萄糖 (FDG)PET显像对霍奇金淋巴瘤 (HL)和以世界卫生组织(WHO)分类标准分类的不同亚型非霍奇金淋巴瘤 (NHL)的诊断价值。方法 对 2 36例淋巴瘤 (6 2例HL和 174例NHL)患者的FDGPET全身显像结果进行回顾性分析 ,并与WHO病理分型的结果比较。结果 PET显像对淋巴瘤的检出阳性率为 94 % (2 2 1 2 36例 ) ,对HL和NHL的阳性率分别为 97% (6 0 6 2例 )和 93% (16 1 174例 )。在不同NHL亚型中 ,8例套细胞淋巴瘤 ,99% (76 77例 )的弥漫性大B细胞淋巴瘤 (DLBCL) ,95 % (5 5 5 8例 )的滤泡性淋巴瘤 (FL) ,73% (8 11例 )的淋巴结边缘区淋巴瘤(MZL) ,2 3例黏膜相关性 (MALL型 )结外边缘区B细胞淋巴瘤 (MALT MZL) ,5 8例的无其他特征外周T细胞淋巴瘤 (PTCL) ,2 3例的伯基特淋巴瘤 (BL) ,2例间变性大细胞性淋巴瘤和覃样肉芽肿、小淋巴细胞性淋巴瘤和NK T细胞型淋巴瘤各 1例FDG摄取异常 ,而 13例 (3例MZL ,3例PTCL ,3例FL ,MALT MZL、DLBCL、BL和前体T淋巴母细胞淋巴瘤各 1例 )未见异常FDG分布。结论 1 8F FDGPET显像对常见的NHL亚型检出阳性率较高 ,对相对少见的NHL亚型检出阳性率较低。管樑 Rebecca Elstrom Zhuang Hong-ming Stephen J.Schuster 朱承谟 Abass Alavi 2004中华核医学杂志2004,24,4:9
4Energy-based numerical models for assessment of soil liquefaction显示文摘这研究介绍基因编程(GP ) 的有希望的变体,也就是线性的基因编程(LGP ) 并且多表达式编程(MEP ) 到评估沙的土壤的液化抵抗。概括 LGP 和基于 MEP 的关系在要求触发液化(能力精力) 和影响沙的液化特征的因素的紧张精力密度之间被开发。关联基于证实并且广泛地分散了从文学获得的试验性的结果的井被建立。验证导出的模型的适用性,他们被雇用估计没在分析被包括的测试结果的部分的能力精力价值。模型的外部确认用研究人员推荐的统计标准被验证。敏感和参量的分析为关联的进一步的确认被执行。结果显示建议关联有效地能够捕获很多沙的土壤的液化抵抗。发达关联比在文学发现的模型提供显著地更好的预言表演。而且,最好的 LGP 和 MEP 模型比最佳的传统的 GP 模型执行上级。确认阶段在液化的发作为他们的一般应用程序证实导出的关联的效率到对紧张精力的评价。Amir Hossein Alavi Amir Hossein Gandomi 2012Geoscience Frontiers2012,3,4:7
5A Phase I Study of an Agonist CD40 Monoclonal Antibody (CP-870,893) in Combination with Gemcitabine in Patients with Advanced Pancreatic Ductal Adenocarcinoma显示文摘Gregory L. Beatty Drew A. Torigian E. Gabriela Chiorean Babak Saboury Alex Brothers Abass Alavi Andrea B. Troxel Weijing Sun Ursina R. Teitelbaum Robert H. Vonderheide Peter J. O’Dwyer 2013Clinical Cancer Research2013,,22:6
6Kinetic studies of the oxidative coupling of methane over the Mn/Na_2WO_4/SiO_2 catalyst显示文摘Oxidative coupling of methane is a direct way to obtain C2 hydrocarbon, and Mn-Na-W/SiO2 catalyst is the most promising among all the catalysts. The 2%Mn/5%Na2WO4/SiO2 catalyst was prepared by the incipient wetness impregnation method. A 7-step heterogeneous reaction model of the oxidative coupling of methane to C2 hydrocarbons was conducted by co-feeding methane and oxygen at a total pressure of 1 bar over the catalyst. The kinetic measurements were carried out in a micro-catalytic fixed bed reactor. The kinetic data were obtained at the appropriate range of reaction conditions (4 kPaSeyed Mehdi Kamali Shahri Seyed Mehdi Alavi 2009Journal of Natural Gas Chemistry2009,18,1:5
7Effects of CO_2 content on the activity and stability of nickel catalyst supported on mesoporous nanocrystalline zirconia显示文摘The effects of carbon dioxide content on the catalytic performance and coke formation of nickel catalyst sup- ported on mesoporous nanocrystalline zirconia with high surface area and pure tetragonal crystalline phase were investigated in methane reforming with carbon dioxide. The samples were characterized by XRD, BET, TPR, TPO, TPH, TEM, and SEM techniques. The catalyst prepared showed high surface area and a mesoporous structure with a narrow pore size distribution. The obtained results revealed that the increase in CO2 content increased the methane conversion and stability of the catalyst and significantly reduced the coke deposition. The TPH analysis showed that several species of carbon with different reactivities toward hydrogenation were deposited on the spent catalysts employed under different CO2 contents.M. Rezaei S.M. Alavi S. Sahebdelfar Zi-Feng Yan 2008Journal of Natural Gas Chemistry2008,17,3:5
8Effect of ultrasonic vibration-assisted laser surface melting and texturing of Ti-6Al-4V ELI alloy on surface properties显示文摘Ultrasonic vibration-assisted laser surface processing that involves application of vertical ultrasonic vibrations to the Ti-6 Al-4 V alloy substrates while being irradiated with a CO_2 laser was performed for the development of laser melted and textured surfaces with potential applications in biomedical implants.The laser processing resulted in very consistent repeating undulating grooved surfaces, and the undulations were significantly more pronounced in the samples processed with higher ultrasonic power outputs.The phase evolution, studied by x-ray diffraction, confirmed that the laser processing triggered transformation of globular α→ acicular α and martensitic α' as well as increased amounts of retained α phases,which were also reflected in the microscopic analysis. The surface texture developed by laser processing resulted in increased surface wettability with increasing ultrasonic power output. The textured surfaces exhibited marked decrease in coefficients of friction during sliding wear testing performed under simulated body fluid due to lubricant entrainment within the textured grooves. The texturing also resulted in significant reduction in surface contact area during the wear process, which considerably reduced the overall wear rates due to abrasive wear.Sourabh Biswas S.Habib Alavi Bhishma Sedai Frank D.Blum Sandip P.Harimkar 2019Journal of Materials Science & Technology2019,35,2:5
9大豆提取物抗戊四唑所致卵巢切除大鼠痉挛的作用(英文)显示文摘目的:研究大豆提取物抗戊四唑所致卵巢切除大鼠痉挛的作用。方法:雌性Wistar大鼠随机分为4组(n=15),分别为假手术组、卵巢切除组、低剂量大豆提取物组和高剂量大豆提取物组。假手术组大鼠行假手术,其余3组大鼠行卵巢切除术。每组大鼠再随机分为2个亚组,其中一个亚组(n=7)每日予低剂量戊四唑(40mg/kg)腹腔内注射,连续14d;另一亚组(n=8)予一次高剂量戊四唑(90mg/kg)腹腔内注射。在戊四唑注射前30min,低剂量大豆提取物(20mg/kg)及高剂量大豆提取物(60mg/kg)组分别腹腔内注射大豆提取物,假手术组及卵巢切除组注射生理盐水。上述步骤完成后,将大鼠置于树脂玻璃箱中观察60min。结果:重复低剂量注射戊四唑14d,卵巢切除组大鼠的痉挛评分在第3、5、8、10、11、12及13天低于假手术组(P<0.05或P<0.01),而低剂量大豆提取物组和高剂量大豆提取物组大鼠的痉挛评分高于卵巢切除组(P<0.05或P<0.01)。一次性高剂量注射戊四唑后,与假手术组相比,卵巢切除组大鼠阵发性强直性抽搐潜伏期延长,而最小阵发性痉挛潜伏期无明显变化;与卵巢切除组相比,低剂量及高剂量的大豆提取物显著缩短了大鼠阵发性强直性抽搐及最小阵发性痉挛的潜伏期(P<0.01)。结论:雌激素能够影响戊四唑所致大鼠痉挛的严重程度,而大豆中所含的植物雌激素也具有类似作用,这种作用还有待更多的研究予以证实。Ali Reza Ebrahimzadeh Bideskan Mahmoud Hosseini Toktam Mohammadpour Reza Karami Mehdi Khodamoradi Habibollah Nemati Karimooy Hassan Alavi 2011中西医结合学报2011,9,6:4
10非对称N-(亚水杨基)二亚乙基三胺铜(Ⅱ)配合物的合成、结构分析和催化活性评价(英文)显示文摘A new copper(Ⅱ) complex of a non‐symmetric Schiff base, [CuII(saldien)(H2O)]+(1), has been synthesized and characterized by elemental analysis and several other spectroscopic methods (Hsaldien = N‐(salicylidene)diethylenetriamine). The crystal structure of 1 has also been determined by X‐ray crystallography. The geometry of the complex cation in 1 was found to be distorted square pyramidal with the mononegative Schiff base coordinating to the copper in a tetradentate mode via the O,N,N', and N''‐donor atoms. The remaining coordination site was occupied by the O atom of a H2O molecule in the axial position. The catalytic potential of 1 was tested in the oxidation reactions of cyclooctene and cyclohexene with aqueous 30% H2O2/NaHCO3 in acetonitrile. These reactions proceeded smoothly to give the corresponding epoxides with selectivity levels greater than 99%. This catalytic system also showed high levels of activity and selectivity towards the oxidation of cyclohexane (i.e., cyclohexanol 37% and cyclohexanone 54%) in comparison with most of the other Cu‐based systems reported in the literature.Hassan HOSSEINI-MONFARED Sohaila ALAVI Milosz SICZEK 2013催化学报2013,34,7:2
11Syngas production by combined carbon dioxide reforming and partial oxidation of methane over Ni/α-Al_2O_3 catalysts显示文摘Ni/α-Al2O3 catalysts were found to be active in the temperature range 600 ~ 900℃ for both CO2 reforming and partial oxidation of methane.The effects of Ni loading,reaction temperature and feed gas ratio for the combination of CO2 reforming and partial oxidation of CH4 over Ni/α-Al2O3 were investigated.Catalysts of xwt%Ni/α-Al2O3(x=2.5,5,8 and 12) were prepared by wet impregnating the calcined support with a solution of nickel nitrate.XRD patterns and activity tests have verified that the 5wt%Ni/α-Al2O3 was the most active catalyst,as compared with the other prepared catalyst samples.An increase of the Ni loading to more than 5wt% led to a reduction in the Ni dispersion.In addition,by combining the endothermic carbon dioxide reforming reaction with the exothermic partial oxidation reaction,the loss of catalyst activity with time on stream was reduced with the amount of oxygen added to the feed.Armin Moniri S.Mehdi Alavi Mojgan Rezaei 2010Journal of Natural Gas Chemistry2010,19,6:2
12^(18)FDG-PET在诊断头颈部鳞状细胞癌复发中的价值显示文摘目的 :了解18FDG -PET在诊断头颈部鳞状细胞癌复发中的价值 ,确定标准吸收值 (SUV)来鉴别放疗后的炎症与肿瘤复发。材料和方法 :头颈部鳞状细胞癌患者 43例 ,在放疗后至少 4个月 (平均 11个月 )进行18FDG PET检查。计算感兴趣区的SUV值。肿瘤复发诊断依赖组织病理学检查或 6个月以上的临床随访。结果 :43例患者中 ,FDG PET阳性 2 3例 ,其中 3例为假阳性 ;2 0例为阴性 ,其中假阴性 2例。FDG PET的诊断准确性是 88% (38/ 43) ,而CT/MRI的诊断准确性则为 6 6 % (2 5 / 38)。肿瘤复发病灶和炎症病灶的SUV有部分重叠 ,无统计学上差异 (p =0 31)。结论 :18FDG PET检测头颈部鳞状细胞癌复发中肉眼分析更有价值 ;18FDG -PET较CT/MRI更为准确。李培勇 陈刚 朱承谟 Abass Alavi 2001中国医学影像学杂志2001,9,2:2
13化疗所致恶心呕吐对复发性卵巢癌患者预后的影响:纳入1213例患者数据的meta分析结果显示文摘背景与目的 本研究旨在研究化疗所致恶心呕吐(chemotherapy-induced nausea and vomiting,CINV)对化疗药物剂量减少、中止以及患者生存获益的潜在影响。方法 本研究基于德国东北妇科肿瘤学会(North-Eastern German Society of Gynecological Oncology,NOGGO)开展的3项Ⅱ/Ⅲ期临床试验中的1213例复发性卵巢癌患者的原始数据,进行了个体病例数据的meta分析。通过Logistic回归和Cox回归分析,对年龄、ECOG评分、化疗周期数、复发次数、并发症以及不同研究等因素进行校正后,评估相应的比值比和风险比(hazard ratio,HR)。结果 大多数(58.1%)患者发生了恶心,且近三分之一(31.0%)的患者出现呕吐。CINV的发生与FIGO分期、分级、组织学以及复发次数无关;必须的化疗药物减量和中止化疗与恶心、呕吐的发生亦无相关性(P=0.88,P=0.39;P=0.25,P=0.54)。发生Ⅲ/Ⅳ级恶心呕吐患者的无进展生存期更短(P=0.02,Ⅲ/Ⅳ级恶心的HR=1.58,95%CI:1.14–2.20;P=0.02,Ⅲ/Ⅳ级呕吐的HR=1.67,95%CI:1.15–2.42)。发生Ⅲ/Ⅳ级恶心和呕吐的患者生存期较短(P <0.001,Ⅲ/Ⅳ级恶心的HR=2.35,95%CI:1.64–3.37;P <0.001,Ⅲ/Ⅳ级呕吐的HR=1.67,95%CI:1.15–2.42)。结论 CINV与复发性卵巢癌患者较差的预后显著相关,而与必须的化疗药物减量和中止无相关性。本研究强调CINV防治是早期最佳支持治疗的重要环节。Hannah Woopen R Richter R Chekerov G Inci S Alavi J P Grabowski J Sehouli 尹如铁(译) 2022癌症2022,41,6:2
14Mild and Efficient Synthesis of 1-(6-Chloroquinoxalin-2-yl)-2- [4-(trifluoromethyl)-2,6-dinitrophenyl] Hydrazine Derivatives by Microwave Irradiation显示文摘MILAD Taheri HANIYEH Alavi HAMIDEH Nazari 2014Chemical Research in Chinese Universities2014,30,3:2
15Fluorodexoyglucose-PET in the management of breast cancer显示文摘Kumar R Alavi A 2004Radiol Clin N Am2004,42,6:1
16Role of angiotensin Ⅱ in diabetic nephropathy显示文摘Leehey D J Singh A K Alavi N 2000Kidney Int2000,,:1
17Charge transport along the λ- DNA显示文摘Tran P Alavi B Gruner G 2000Phys Rev Lett2000,85,:1
18Changes in Normal Glycosylation Mechanisms in Autoimmune Rheumatic Disease显示文摘 Sumsr N Alavi A 1995Postgraduate Medicine1995,97,4:1
19Computer-mediated Collaborative Learning: an Empirical Evaluation 显示文摘Alavi M 1994MIS Quarterly1994,,6:1
20Genomic rearrange- ments in OPAl are frequent in patients with autosomal domi- nant optic atrophy 显示文摘Fuhrmann N Alavi MV Bitoun P 2009Med Genet2009,46,8:1
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