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数字PFC控制实现电机控制系统监控的增值

中国集成电路 2015年第8期24卷 72-75页

作者： dara o'sullivan ADI 公司

虽然数字PFC成本更高且可能更为复杂,但它相比替代方案具有巨大的优势。功率因数校正（Power-factor correction：PFC）对于工业电机驱动来说越来越重要,这在很大程度上是因为公用事业公司加强谐波含量监管所导致的。其他附带好处涉及... 详细信息

虽然数字PFC成本更高且可能更为复杂,但它相比替代方案具有巨大的优势。功率因数校正（Power-factor correction：PFC）对于工业电机驱动来说越来越重要,这在很大程度上是因为公用事业公司加强谐波含量监管所导致的。其他附带好处涉及效率、电压质量和导通器件的额定值。与模拟器件相比,数字PFC控制器成本更高,也可能更复杂。

关键词： PFC 电机控制系统控制处理器功率因数校正模拟器件替代方案公用事业公司 correction 主电机电压质量

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基于状态的监控对于实现工业4.0至关重要

世界电子元器件 2023年第2期 12-17页

作者： Richard Anslow dara o’sullivan 不详

德国的工业4.0和中国制造的“中国制造2025”等政府举措正在加速制造业无处不在的网络化自动化趋势。此外,智能传感器系统正在增强自动化,提供更多数据可用于监测和控制生产过程。特别是,《中国制造2025》旨在快速发展高科技产业,包括... 详细信息

德国的工业4.0和中国制造的“中国制造2025”等政府举措正在加速制造业无处不在的网络化自动化趋势。此外,智能传感器系统正在增强自动化,提供更多数据可用于监测和控制生产过程。特别是,《中国制造2025》旨在快速发展高科技产业,包括电动汽车、下一代信息技术(IT)和电信,以及先进的机器人和人工智能。对于更先进的系统,需要更先进的方法来确保系统可靠性。

关键词：智能传感器系统人工智能机器人系统可靠性高科技产业电动汽车网络化自动化

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利用数字隔离器技术增强工业电机控制性能

电子产品世界 2015年第7期22卷 20-23页

作者： dara o'sullivan Maurice Moroney ADI公司

本文介绍了数字隔离器技术,来增强工业电机控制性能并对其进行分类,介绍了隔离方法、进行了延迟特性比较,缝隙数字隔离器技术对电子控制系统的系统影响,给出应用实例,予以工程师参考。

关键词：安全隔离隔离方法延迟特性电机系统

工业电机驱动中的栅极驱动和电流反馈信号隔离

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中国集成电路 2015年第12期24卷 47-51页

作者： dara o’sullivan Nicola o’Byrne ADI公司

1摘要二十多年来，电机电能效率一直是全球能源监管机构关注的重点。这是全球共同努力的一部分，旨在通过增加电能利用率以及使用可再生资源发电，达到最大程度减少碳排放的目的。早期的电机效率法规是自愿的，但很快这些法规就变成强... 详细信息

1摘要二十多年来，电机电能效率一直是全球能源监管机构关注的重点。这是全球共同努力的一部分，旨在通过增加电能利用率以及使用可再生资源发电，达到最大程度减少碳排放的目的。早期的电机效率法规是自愿的，但很快这些法规就变成强制性的了，并且每5至10年就会提高最低能效水平要求。

关键词：信号隔离电流反馈栅极驱动电机驱动工业能效水平可再生资源电能利用率

Effects of probiotic supplementation on abdominal pain severity in pediatric patients with irritable bowel syndrome:a systematic review and meta-analysis of randomized clinical trials

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World Journal of Pediatrics 2022年第5期18卷 320-332页

作者： Somayeh Fatahi Amirhossein Hosseini Mohammad Hassan Sohouli Aliakbar Sayyari Katayoun Khatami Zahra Fazeli Farsani Hamzeh Amiri Naghi dara Ivan G.o.de Souza Heitor o.Santos Pediatric Gastroenterology Hepatologyand Nutrition Research Center.Research Institute for Children's HealthShahid Beheshti University of Medical SciencesTehranIran Student Research Committee Faculty of Public Health BranchIran University of Medical Sciences.Tehran.Iran Student Research Committee.Department of Clinical Nutrition and Dietetics Faculty of Nutrition and Food TechnologyShahid Beheshti University of Medical Sciences.TehranIran School of Health Sciences.Universidade Salvador(UNIFACS) SalvadorBahia.Brazil School of Medicine Federal University of Uberlandia(UFU)UberlandiaMinas GeraisBrazil

Background Probiotic supplementation has been used to alleviate abdominal pain in children and adolescents with irritable bowel syndrome(IBS),but the evidence is not ***,a systematic review and meta-analysis of randomized clinical trials(RCTs)were performed to investigate the effects of probiotic supplementation on abdominal pain in pediatric patients with *** PubMed/MEDLINE,Web of Science,Scopus,Cochrane Library,and Embase were the available databases searched to find relevant randomized clinical trials up to April *** effect size was expressed as weighted mean differenee(WMD)and 95% confidence interval(CI).Results Seven RCTs with 441 participants were included,from which the meta-analysis demonstrated that probiotic supplementation has a significant effect on reducing abdominal pain in pediatric patients with IBS(WMD=-2.36:95%CI-4.12 to-0.60;P=0.009).Although our study involved children and adolescents(≤18 years),the effects of probiotic supplementation seem to be more potent in patients under 10 years old(WMD=-2.55;95%CI-2.84 to -2.27)compared to patients aged 10-18 years(WMD=-1.70;95%CI-2.18 to -1.22).The length of supplementation longer than four weeks was more effective(WMD=-2.43;95%CI-2.76 to -2.09).Conclusion Probiotic supplementation can reduce abdominal pain in pediatric patients with IBS.

关键词： Abdominal pain Adolescents-Irritable bowel syndrome Meta-analysis Probiotic

Analysis of Nigerian Electricity Generation Multi Year Tariff order Pricing Model

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Energy and Power Engineering 2017年第10期9卷 541-554页

作者： Nnamdi B. Anosike Jude E. dara Ugochukwu C. Ngwaka Frances o. Enemuoh Mechanical Engineering Department Nnamdi Azikiwe University Awka Nigeria Mechanical Engineering Department Enugu State University of Science and Technology Enugu Nigeria Electrical Engineering Department Nnamdi Azikiwe University Awka Nigeria

The Multi Year Tariff order (MYTo) is the Nigerian Electricity Regulatory Commission (NERC) pricing framework for determining the Nigerian Electricity Supply Industry (NESI) pricing model. one of the objectives of the NERC’s MYTo pricing model is to ensure regulated electricity end user tariff without compromising return on investment. Achieving this objective is imperative to attract investors in the growing Nigerian electricity market. However, NESI has hitherto been faced with challenges ranging from its inability to provide sufficient power to its customers to not being viable enough to provide return on capital invested. In this paper, sensitivity analysis of power plant operation and performance parameters on the cost of electricity (CoE) generation using MYTo (power generation) pricing model were evaluated. Thermodynamic modeling and simulation of an open cycle gas turbine (oCGT) was carried out to augment scarce data on power plant performance and operation in Nigeria. Sensitivity analysis was carried out using probabilistic method based on Monte Carlo simulation (MCS) implemented in commercial software (@ Risk®). The result highlighted sensitivity of the model input parameters to cost of electricity generation based on technical and financial assumptions of MYTo model. Seven most influential parameters affecting generation cost were identified. These parameters and their correlation coefficients are given as: 1) foreign exchange rate, 0.76;2) cost of fuel, 0.51;3) thermal efficiency, -0.23;4) variable operation and maintenance cost, 0.22;5) fixed operating and maintenance cost, -0.03;6) capacity factor, -0.02;and 7) average capacity degradation, 0.01. Based on the gas turbine engine and input parameter distributions statistics for this study, the generation cost lies between 9.84 to 15.45 N/kWh and the probabilities of CoE within these values were established.

关键词： Nigerian electricity Market Generation Multi Year Tariff order (MYTo) Combustion Turbine Electricity Price Uncertainty Government Interventions