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| 1 | 聚类有效性评价综述显示文摘在聚类分析应用中,迫切需要一种客观公正的质量评价方法来评判聚类结果的有效性。为此,从外部评价法、内部评价法和相对评价法三个方面,归纳综述了常用的聚类有效性评价方法,并讨论了模糊聚类评价法和聚类最佳类别数的自动确定问题。 | 杨燕 靳蕃 KAMEL Mohamed | 2008 | 计算机应用研究2008,25,6: | 117 |
| 2 | 一种基于蚁群算法的聚类组合方法显示文摘蚂蚁等群居类昆虫被看作能解决复杂问题的分布式系统,研究者从它们的协作性能以及自组织、信息素通信、任务划分等机理中获得灵感,已在组合优化、通信网络、机器人等许多应用领域找到解决问题的新方法。聚类作为一种无监督的学习,能根据数据间的相似程度自动地进行分类。基于蚁群算法的聚类方法已经在当前数据挖掘研究中得到应用。本文提出的基于蚁群算法的聚类组合新方法,模仿多蚁群的协作性能,将运动速度类型各异的多个蚁群,独立而并行地进行聚类分析,然后组合其聚类结果为超图,再用蚁群算法对超图进行2次划分。实验结果表明,该方法能自动决定聚类的数目,聚类组合方法能明显改善聚类质量。 | 杨燕 靳蕃 Mohamed Kamel | 2004 | 铁道学报2004,26,4: | 39 |
| 3 | Adaptive mode switching of hypersonic morphing aircraft based on type-2 TSK fuzzy sliding mode control显示文摘This paper presents a novel adaptive mode switching scheme for hypersonic morphing aircraft with retracted winglets based on type-2 Takagi-Sugeno-Kang(TSK) fuzzy sliding mode control. For each of retracting and stretching modes, a specific sliding mode controller has been adopted. Drawing upon input/output linearization to globally linearize the nonlinear model of the hypersonic aircraft at first, a type-2 TSK fuzzy logic system is devised for robust mode switching between these sliding mode controllers. For rapid stabilization of the system, the adaptive law for mode switching is designed using a direct constructive Lyapunov analysis.Simulation results demonstrate the stability and smooth transition using the proposed switched control scheme. | JIAO Xin FIDAN Baris JIANG Ju KAMEL Mohamed | 2015 | Science China(Information Sciences)2015,58,7: | 8 |
| 4 | Pancreatic injury in patients with septic shock: A literature review显示文摘Sepsis and septic shock are life threatening condition associated with high mortality rate in critically-ill patients. This high mortality is mainly related to the inadequacy between oxygen delivery and cellular demand leading to the onset of multiorgan dysfunction. Whether this multiorgan failure affect the pancreas is not fully investigated. In fact, pancreatic injury may occur because of ischemia, overwhelming inflammatory response, oxidative stress, cellular apoptosis and/or metabolic derangement. Increased serum amylase and/or lipase levels are common in patients with septic shock. However, imaging test rarely reveal significant pancreatic damage. Whether pancreatic dysfunction does affect the prognosis of patients with septic shock or not is still a matter of debate. In fact, only few studies with limited sample size assessed the clinical relevance of the pancreatic injury in this group of patients. In this review, we aimed to describe the epidemiology and the physiopathology of pancreatic injury in septic shock patients, to clarify whether it requires specific management and to assess its prognostic value. Our main finding is that pancreatic injury does not significantly affect the outcome in septic shock patients. Hence, increased serum pancreatic enzymes without clinical features of acute pancreatitis do not require further imaging investigations and specific therapeutic intervention. | Anis Chaari Karim Abdel Hakim Kamel Bousselmi Mahmoud Etman Mohamed El Bahr Ahmed El Saka Eman Hamza Mohamed Ismail Elsayed Mahmoud Khalil Vipin Kauts William Francis Casey | 2016 | World Journal of Gastrointestinal Oncology2016,8,7: | 8 |
| 5 | A novel long non-coding RNA Myolinc regulates myogenesis through TDP-43 and Filip1显示文摘 | Giuseppe Militello Mohammed Rabiul Hosen Yuliya Ponomareva Pascal Gellerts Tyler Weirick David John Sajedah Mahmoud Hindi Kamel Mamchaoui Vincent Mouly Claudia Doring Lidan Zhang Miki Nakamura Ashok Kumar So-ichiro Fukada Stefanie Dimmeler Shizuka Uchida | 2018 | Journal of Molecular Cell Biology2018,10,2: | 7 |
| 6 | Unknown Inputs Observer for a Class of Nonlinear Uncertain Systems: An LMI Approach显示文摘This paper deals with the simultaneous estimation of states and unknown inputs for a class of Lipschitz nonlinear systems using only the measured outputs. The system is assumed to have bounded uncertainties that appear on both the state and output matrices. The observer design problem is formulated as a set of linear constraints which can be easily solved using linear matrix inequalities (LMI) technique. An application based on manipulator arm actuated by a direct current (DC) motor is presented to evaluate the performance of the proposed observer. The observer is applied to estimate both state and faults. | Kamel Mohamed Mohammed Chadli Mohamed Chaabane | 2012 | International Journal of Automation and computing2012,9,3: | 6 |
| 7 | Exploitation of Gene Expression and Cancer Biomarkers in Paving the Path to Era of Personalized Medicine显示文摘Cancer therapy agents have been used extensively as cytotoxic drugs against tissue or organ of a specific type of cancer. With the better understanding of molecular mechanisms underlying carcinogenesis and cellular events during cancer progression and metastasis, it is now possible to use targeted therapy for these molecular events. Targeted therapy is able to identify cancer patients with dissimilar genetic defects at cellular level for the same cancer type and consequently requires individualized approach for treatment. Cancer therapy begins to shift steadily from the traditional approach of ‘‘one regimen for all patients' to a more individualized approach, through which each patient will be treated specifically according to their specific genetic defects. Personalized medicine accordingly requires identification of indicators or markers that guide in the decision making of such therapy to the chosen patients for more effective therapy. Cancer biomarkers are frequently used in clinical practice for diagnosis and prognosis, as well as identification of responsive patients and prediction of treatment response of cancer patient. The rapid breakthrough and development of microarray and sequencing technologies is probably the main tool for paving the way toward ‘‘individualized biomarker-driven cancer therapy' or ‘‘personalized medicine'. In this review, we aim to provide an updated knowledge and overview of the current landscape of cancer biomarkers and their role in personalized medicine, emphasizing the impact of genomics on the implementation of new potential targeted therapies and development of novel cancer biomarkers in improving the outcome of cancer therapy. | Hala Fawzy Mohamed Kamel Hiba Saeed A.Bagader Al-Amodi | 2017 | Genomics, Proteomics & Bioinformatics2017,15,4: | 3 |
| 8 | 聚类组合研究的新进展显示文摘作为目前聚类分析的新兴研究热点,聚类组合方法能将两种或多种聚类方法集成起来以改善其性能。从聚类多样性和共识函数两方面综述了最新研究进展,探讨将神经网络组合的思想用于聚类组合。最后指出了将来可能的研究方向。 | 杨燕 靳蕃 KAMEL Mohamed | 2008 | 计算机工程与应用2008,44,11: | 3 |
| 9 | Aspartate transaminase to platelet ratio index in hepatitis C virus and Schistosomiasis coinfection显示文摘AIM: To assess the diagnostic accuracy,of aminotransferase-to-platelet ratio index(APRI) alone and with antischistosomal antibody(Ab) in patients with hepatitis C virus(HCV) and schistosomiasis coinfection. METHODS: This retrospective study included medical records of three hundred and eighty three Egyptianmen patients who had undergone percutaneous liver biopsy between January 2006 to April 2014 in tertiary care hospital in Qatar for diagnosis or monitoring purpose were selected. Data of patients > 18 years of age were included in the study. The values of HCV RNA titer and antischistosomal antibody titer were also taken into consideration. Patients were excluded from the study if they had any other concomitant chronic liver disease,including; history of previous antiviral or interferon therapy,immunosuppressive,therapy,chronic hepatitis B infection,human immunodeficiency virus co-infection,autoimmune hepatitis,decompensated liver disease,hepatocellular carcinoma,prior liver transplantation,and if no data about the liver biopsy present. RESULTS: Median age of patients was 46 years. About 7.1% had no fibrosis,whereas 30.4%,37.5%,20.4%,and 4.6% had fibrosis of stage Ⅰ,Ⅱ,Ⅲ,and Ⅳ respectively. In bivariate analysis,APRI score,levels of AST,platelet count and age of patient showed statistically significant association with liver fibrosis(P < 0.0001); whereas antischistosomal antibody titer(P = 0.52) and HCV RNA titer(P = 0.79) failed to show a significant association. The respective AUC values for no fibrosis,significant fibrosis,severe fibrosis and cirrhosis of APRI score were 63%,73.2%,81.1% and 88.9% respectively. This showed good sensitivity and specificity of APRI alone for grading of liver fibrosis. But the inclusion of anti-Schistosoma antibody did not improve the prediction of fibrosis stage. CONCLUSION: The study results suggest that noninvasive biochemical markers like APRI are sensitive and specific in diagnosing the degree of fibrosis and cirrhosis in patients with coinfection of HCV and schistosomiasis as compared to biopsy. The addition of antischistosomal Ab to APRI did not improve sensitivity for predicting the degree of cirrhosis. | Moutaz Derbala Mohammed Elshiekh Elbadri Aliaa Mohamed Amer Saad Al Kaabi Khaleel Hassan Sultan Yasser Medhat Kamel Eman Hassan Satti Elsayed Tony Yervant Avades Prem Chandra Fatma M Shebl | 2015 | World Journal of Gastroenterology2015,21,46: | 2 |
| 10 | Correlation between corneal demarcation line depth in epithelium-off and trans-epithelium accelerated corneal cross linking and keratoconus progression显示文摘AIM:To compare corneal demarcation line(DL)depth in both accelerated epithelium-off and trans-epithelium cross linking(CXL)using anterior segment optical coherence tomography(AS-OCT)and its relation to maximum keratometry(Kmax)progression in both techniques.METHODS:A prospective comparative interventional study where patients with mild to moderate keratoconus(KC)were classified into two groups:accelerated epitheliumoff and trans-epithelium CXL based on corneal pachymetry.Assessment of corneal DL depth was carried out after 3mo by AS-OCT.Kmax readings were evaluated after one year follow up using the Scheimpflug imaging system.RESULTS:Study included 74 eyes of 44 patients.Group A underwent epithelium-off CXL(41 eyes),while Group B underwent trans-epithelium CXL(33 eyes).At 3mo follow up,mean corneal DL depth in Group A was 219.9±58.4μm while in Group B was 127.2±7.8μm(P<0.05).The mean Kmaxchangedfrom51.9±3.9to51.3±4.2dioptersin Group A and from 53.1±4.1 to 53.6±5 diopters in Group B with insignificant difference in Kmax changes in either group(P>0.05).In addition,no significant change in corneal pachymetry was found in both groups(meanchange at 1y:6.4±4.7 and-10.1±2.3μm in Groups A and B respectively).CONCLUSION:Despite a significantly deeper corneal DL depth created by accelerated epithelium-off CXL technique compared to accelerated trans-epithelium CXL,there is no significant impact on keratoconus progression. | Mahmoud Abdel-Radi Zeiad Eldaly Hazem Abdelmotaal Reham Abdelrahman Mohamed Sayed Kamel Soliman | 2020 | International Journal of Ophthalmology(English edition)2020,13,6: | 2 |
| 11 | Antioxidant and free radical-scavenging properties of three flavonoids isolated from the leaves of Rhamnus alaternus L. (Rhamnaceae) : A structure-activity relationship study显示文摘 | Rebai Ben Ammar Wissem Bhouri Mohamed Ben Sghaier Jihed Boubaker Ines Skandrani Aicha Neffati Ines Bouhlel Soumaya Kilani Anne-Marie Mariotte Leila Chekir-Ghedira Marie-Geneviève Dijoux-Franca Kamel Ghedira | 2009 | Food Chemistry2009,,1: | 2 |
| 12 | Analytic studies and numerical simulations of the generalized Boussinesq equation显示文摘 | MOHAMED ALl HAJJI KAMEL AL-KHALED | 2007 | Applied Mathematics and Computation2007,191,: | 1 |
| 13 | Biological treatment of saline wastewater using a salt-tolerant microorganism显示文摘 | Sohair I Abou-Elela Mohamed M Kamel Mariam E Fawzy | | 0,,01: | 1 |
| 14 | A high performance sensorless indirect stator flux orientation control of induction motor drive 显示文摘 | Mohamed Boussak Kamel Jarray | 2006 | IEEE Transactions on Industrial Electronics2006,53,1: | 1 |
| 15 | 基于自适应谐振理论的Web文档聚类集成方法显示文摘提出了基于自适应谐振理论的Web文档聚类集成方法.该方法先用蚁群算法对Web文档进行聚类,再用ART神经网络对聚类结果集成.实验结果表明,集成后的聚类综合质量高于集成前的聚类综合质量. | 杨燕 靳蕃 Kamel Mohamed | 2009 | 西南交通大学学报2009,44,1: | 1 |
| 16 | 源自天然席夫碱的过渡金属配合物在分光光度法测天然水中的Fe(Ⅲ)的应用(英文)显示文摘描述了一种新颖、简便的合成含五齿配位基的大环席夫碱配体的方法,制备和表征了该席夫碱的1∶1包合物。用化学和光谱学方法测定了标题配合物的组成,认为在所有配合物中配位金属原子取八面体结构。数据表明:配体起O2N4六齿结构而每个环绕金属原子在八面体环境中。配合物的红外和1H NMR光谱符合中心金属原子的配位结果。用分光光度法测定了配合物的稳定常数。用共轭余量法(CR method)计算了在热分解的不同阶段配合物活化的动力学和热力学参数。此外,用抑菌圈直径法筛选了配体及其金属配合物抑制细菌和真菌的能力。用回收率试验研究了天然螯合配体在不同天然水体中对Fe(Ⅲ)离子配合作用的影响。 | Khalil M M H Mohamed G G Ismail E H Zayed M E Kamel B A | 2012 | 无机化学学报2012,28,7: | 1 |
| 17 | Analysis of Multi-Dimensional Space-Filling Curves显示文摘 | Mohamed F. Mokbel Walid G. Aref Ibrahim Kamel | 2003 | GeoInformatica2003,,3: | 1 |
| 18 | Region of interest based prostate tissue characterization using least square support vector machine LS-SVM显示文摘 | Mohamed S S Salama M M A Kamel M | 2004 | Lecture Notes in ComputerSc ience2004,3212,: | 1 |
| 19 | Lignan glueosidea from Acanthus ilicifo ?显示文摘 | Tripetch Kanchanapooma Mohamed Salah Kamel b Ryoji Kasai a | 2001 | Phytochemistry2001,,56: | 1 |
| 20 | A Three-Step Camera Calibration Method显示文摘 | Hakan Bacakoglu Mohamed S Kamel | 1997 | IEEE Transactions on Instrumentation and Measurement1997,46,5: | 1 |