维普中文期刊产品整合服务
139篇 您的检索式:作者名="Essa A"
    题名 作者 年代 出处 被引量
1硬实时系统中基于软件容错的动态调度算法显示文摘在硬实时系统中,由于任务超时完成将会导致灾难性后果,因而硬实时系统具有严格的时间及可靠性限制条件.目前实时容错调度算法大部分针对硬件的容错,很少考虑软件运行的故障.提出了两种类似EDF(earliest deadline first)的软件容错的动态实时调度算法:PKSA(probing K-step algorithm)和CUBA(changing utilization-based algorithm).两种算法在任务执行过程中,通过若干试探性检测步骤,提高了任务可执行性的预测,尽可能地避免了任务早期的失败对后续任务的影响,因此提高了任务的完成率,同时也有效地减少了浪费的CPU时间片数量.通过实验测试,与目前所知的同类算法相比,具有更佳的调度性能——调度成本平衡性.李庆华 韩建军 Abbas A Essa 张薇 2005软件学报2005,16,1:18
2Effect of heat input and filler metals on weld strength of gas tungsten arc welding of AISI 316 weldments显示文摘The present work investigates the effect of filler metals and heat input on weld bead geometry and mechanical properties of alloy316 welded by using GTAW.ER309 L,ER316 L and ERNi Cr Mo-3 filler metals,are applied to study their effect on the weldment.Weld defects are examined using radiographic testing.The mechanical properties of welds are evaluated through uniaxial testing,hardness measuring,and bending test.The mechanical properties and cooling rate decrease with increasing heat input.Tensile strength,yield stress and percentage elongation of weldments using three fillers are determined.Best results are obtained using ERNi Cr Mo-3.Besides,weld nugget area,cooling time and solidification time increases with increasing heat input.Finally,applying bending test on weld samples,cracks,tearing and surface defects are not observed.Essam Ahmed Ramy Ahmed A EL-Nikhaily A R S Essa 2020China Welding2020,29,1:7
3Model combining pre-transplant tumor biomarkers and tumor size shows more utility in predicting hepatocellular carcinoma recurrence and survival than the BALAD models显示文摘AIM To assess the performance of BALAD, BALAD-2 and their component biomarkers in predicting outcome of hepatocellular carcinoma(HCC) patients after liver transplant.METHODS BALAD score and BALAD-2 class are derived from bilirubin, albumin, alpha-fetoprotein(AFP), Lens culinaris agglutinin-reactive AFP(AFP-L3), and des-gammacarboxyprothrombin(DCP). Pre-transplant AFP, AFP-L3 and DCP were measured in 113 patients transplanted for HCC from 2000 to 2008. Hazard ratios(HR) for recurrence and death were calculated. Univariate and multivariate regression analyses were conducted. C-statistics were used to compare biomarker-based to predictive models. RESULTS During a median follow-up of 12.2 years, 38 patients recurred and 87 died. The HRs for recurrence in patients with elevated AFP, AFP-L3, and DCP defined by BALAD cut-off values were 2.42(1.18-5.00), 1.86(0.98-3.52), and 2.83(1.42-5.61), respectively. For BALAD, the HRs for recurrence and death per unit increased score were 1.48(1.15-1.91) and 1.59(1.28-1.97). For BALAD-2, the HRs for recurrence and death per unit increased class were 1.45(1.06-1.98) and 1.38(1.09-1.76). For recurrence prediction, the combination of three biomarkers had the highest c-statistic of 0.66 vs. 0.64, 0.61, 0.53, and 0.53 for BALAD, BALAD-2, Milan, and UCSF, respectively. Similarly, for death prediction, the combination of three biomarkers had the highest c-statistic of 0.66 vs 0.65,0.61, 0.52, and 0.50 for BALAD, BALAD-2, Milan, and UCSF. A new model combining biomarkers with tumor size at the time of transplant(S-LAD) demonstrated the highest predictive capability with c-statistics of 0.71 and 0.69 for recurrence and death. CONCLUSION BALAD and BALAD-2 are valid in transplant HCC patients, but less predictive than the three biomarkers in combination or the three biomarkers in combination with maximal tumor diameter(S-LAD).Nicha Wongjarupong Gabriela M Negron-Ocasio Roongruedee Chaiteerakij Benyam D Addissie Essa A Mohamed Kristin C Mara William S Harmsen J Paul Theobald Brian E Peters Joseph G Balsanek Melissa M Ward Nasra H Giama Sudhakar K Venkatesh Denise M Harnois Michael R Charlton Hiroyuki Yamada Alicia Algeciras-Schimnich Melissa R Snyder Terry M Therneau Lewis R Roberts 2018World Journal of Gastroenterology2018,24,12:5
4Prediction of tensile strength of friction stir welded 6061 Al plates显示文摘The present paper investigates the prediction of tensile strength after friction stir welding(FSW)using artificial neural network(ANN)in the MATLAB program.The experimental results are used to develop the mathematical model.The combined influence of welding speed,rotation speed,and axial force on the tensile strength of 6061 Al plates is simulated.Results of the tensile test are used to train and test the ANN model.A multi-layer solution is developed using the ANN model to predict tensile strength.Back propagation(BP)method is initially trained using 80%of the experimental data,then,testing is performed with the rest of the data.Results indicate that predicted values are close to the corresponding measured values.Farghaly Ahmed A El-Nikhaily Ahmed E Essa A R S 2019China Welding2019,28,3:4
5抑郁症的非药物治疗:系统性综述与证据图显示文摘背景抑郁症非药物治疗的疗效比较目前仍然不清楚。方法我们对一些系统性综述作了概述,回顾了随机对照试验(RCT),比较抑郁症非药物治疗的有效性和认知行为治疗(CBT)。对多个电子数据库在2016年2月之前发表的所有文献进行了检索,不限制语言。成对的评阅人进行资料纳入、数据提炼并评估偏倚的风险。在适用的时候进行了荟萃分析。结果我们收录了367项RCT,纳入了约2000名患者,进行了11种治疗,导出17项独立的头对头比较。通过标准化的量表评估,发现CBT、自然疗法、行为干预与躯体活动干预可以降低抑郁的严重程度。然而,这些非药物干预的相对疗效仍然缺乏。这些干预对临床缓解和复发的效果不清楚。CBT的发生率比抗抑郁药物更低。局限性由于证据缺乏一致性、证据不清或偏倚风险高,导致证据的质量只是低到中等,限制了我们研究结果的可信度。结论抑郁症的非药物治疗能减少抑郁症状,在轻度到重度抑郁症患者中,应当合并抗抑郁药物治疗,一同进行。对于非药物治疗的选择,应当根据患者的价值观、偏好、临床和社会因素来与患者共同作出决定。Wigdan H Farah Mouaz Alsawas Maria Mainou Fares Alahdab Magdoleen H Farah Ahmed T Ahmed Essa A Mohamed Jehad Almasri Michael R Gionfriddo Ana Castaneda-Guarderas Khaled Mohammed Zhen Wang Noor Asi Craig N Sawchuk Mark D Williams Larry J Prokop M Hassan Murad Annie LeBlanc 2017英国医学杂志中文版2017,20,11:2
6Graphcut textures: image and video synthesis using graph cuts 显示文摘Kwatra V Schodl A Essa I 2003ACM Transactions on Graphic2003,22,3:1
7Graphcut textures: image and video synthesis using graph cuts 显示文摘Kwatra V Schodl A Essa I 2003ACM Transactions on Gra- phics2003,22,3:1
8Serum Hepcidin;a direct Link between anemia of inflammation and coronary artery atherosclerosis in patients with rheumatoid arthritis显示文摘Abdel K M EL-Barbary A M Essa S A 2011J Rheuma- tol2011,38,10:1
9A new approach for the recovery of precious metals from solution and from leachates derived from electronic scrap 显示文摘Maeaskie L E Creamer N J Essa A M M Brown N L 2007Biotechnology and Bioengineering2007,96,4:1
10Graphcut Textures:Image and Video Synthesis Using Graph Cuts显示文摘 V Schodl A Essa I Turk G Bobick A 2003ACM Transactions on Graphics (S0730-0301)2003,22,3:1
11Cou- pled eleetrokinetics-adsorption technique for simultane- ous removal of heavy metals and organics from saline- sodic soil 显示文摘Lukman S Essa M H Mu'Azu N D Bukhari A 2013The Scientific World Journal2013,2013,34:1
12Ubiquitous sensing for smart and aware environments 显示文摘Essa I A 2000IEEE Personal Communications2000,,10:1
13Effects of introducing ducks into fish ponds on water quality, natural productivity and fish production together with the economic evaluation of the integrated and non-integrated systems显示文摘SOLIMAN A K EL-HORBEETY A A A ESSA M A R 2000Aquaculture International2000,8,:1
14Texture optimization for example-based synthesis 显示文摘Kwatra V Essa I Bobick A 2005ACM Transactions on Graphics2005,24,3:1
15Coding,analysis,interpretation,and recognition of facial expressions显示文摘 I PENTLAND A 1997IEEE Trans Pattern Anal Machine Intell1997,19,:1
16Effect of salinity stress on growth and nutrient composition of three soybean( Glycine max L Merrill) cuhivars 显示文摘Essa T A 2002Journal of Agronomy and Crop Science2002,188,:1
17Texture optimization for example-based synthesis显示文摘KWATRA V ESSA I BOBICK A 2005ACM Transactions onGraphic2005,24,3:1
18Texture optimization for example based synthesis 显示文摘KWATRA V ESSA I B()BICK A 2005ACM Transactions on Graphics2005,24,3:1
19Brain region-specific deficit in mitochondrial electron transport chain complexes in children with autism显示文摘Chauhan A Gu F Essa MM 2011JNeurochem2011,117,2:1
20Solar drying characteris-tics of strawberry显示文摘Behagya A E Gamea G R Essa A H A 2007Journal of Food Engi- neering2007,78,2:1
返回顶部 每页显示:
共7页 首页 上一页 第1页 下一页 末页 /7 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费