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electromagnetic and Mechanical Stress Analysis of Wind-Driven Synchronous Reluctance Generator

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CES Transactions on electrical Machines and Systems 2019年第1期3卷 107-114页

作者： Kitaba Tefera Praveen Tripathy Senior Ravindranath adda the Department of electronics and electrical Engineering Indian Institute of TechnologyGuwahatiAssam

The investigation explores the mechanical stress and electromagnetic performance for a wind-driven synchronous reluctance generator(SRG).The change in the mechanical stress due to the presence of centripetal force,wind speed,and rotor speed are evaluated for different thickness of tangential and radial ***,the variation in the electromagnetic feature such as the q−and d−axes flux,reactance ratio,inductance,torque and torque ripple are discussed for different thickness of tangential and radial *** both tangential and radial ribs thickness has an effect on the electromagnetic performance,but it is observed that effect is significantly more with the variation of tangential rib ***,the mechanical stress analysis for rotor design has been explored in this *** is observed that high concentration of peak stress on the rotor ribs,which limits the range of rotor speed.

关键词： electromagnetic mechanical integrity synchronous reluctance generator stress and safety factor wind speed.

Quantitative ultrastucture analysis of neuroendocrine cells of gastric mucosa on normal and pathological conditions

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World Journal of Gastroenterology 1996年第3期2卷 155-157页

作者：虞积耀 D'adda T 海军总医院病理科意大利Parma大学

AIMS To study the quantitative ultrastucture of neu- roendocrine cells of gastric mucosa on normal anc pathological conditions including the duodenal ulcer (DU) and Zollinger-ellison syndrome (ZES). METHODS The neuroendocrine cells of the gastric mucosa of eight normal subjects,six patients with DU and five patients with ZES were quantitatively investi- gated with electro microscope and ultrastructure image analyzer. RESULTS The volume density of neuroendocrine cells in DU was 1.3% and 0.8% (vs 1.6% and 0.9%,P>0.05) in gastric antrum and corpus respectively. In antrum,G cells was of 65% (Pells decreased in cell density (3% vs 9.5%) and in number of cell per unit area (Pell density of ECL cells increased (49% vs 30%,Pells and EC cells decreasec (2% Pely),and the number of D cell per unit area markedly decreased. In ZES,D cells in corpus decreased in cell density (4% vs 22%,Pells also decreased (11% vs 24%,Pells increased (65% vs 30%,Pells present some changes. Incresed gastrin in DU and ZES patients may be caused by the decrease of D cells and somatostatin secretion.

关键词： gastric mucosa/pathology neuroendocrine cells duodenal ulcer Zollinger-ellison syndrome

Carvedilol vs endoscopic variceal ligation for primary and secondary prevention of variceal bleeding: Systematic review and metaanalysis

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World Journal of Hepatology 2019年第5期11卷 464-476页

作者： Michael Dwinata David Dwi Putera Muhamad Fajri adda’i Putra Nur Hidayat Irsan Hasan Department of Internal Medicine Depati Hamzah General HospitalPangkalpinang 33684Indonesia School of Medicine and Public Health University of SydneySydney 2006Australia Faculty of Medicine Public Healthand NursingUniversitas Gadjah MadaYogyakarta 55281Indonesia Hepatobiliary Division Department of Internal MedicineFaculty of Medicine Universitas IndonesiaCipto Mangunkusumo National General HospitalJakarta 10430Indonesia

BACKGROUND Variceal hemorrhage is associated with high mortality and is the cause of death for 20–30%of patients with ***βblockers(NSBBs)or endoscopic variceal ligation(EVL)are recommended for primary prevention of variceal bleeding in patients with medium to large esophageal ***,combination of EVL and NSBBs is the recommended approach for the secondary *** has greater efficacy than other NSBBs as it decreases intrahepatic *** hypothesized that there was no difference between carvedilol and EVL intervention for primary and secondary prevention of variceal bleeding in cirrhosis *** To evaluate the efficacy of carvedilol compared to EVL for primary and secondary prevention of variceal bleeding in cirrhotic patients METHODS We searched relevant literatures in major journal databases(CENTRAL,MEDLINE,and EMBASE)from March to August *** with cirrhosis and portal hypertension,regardless of aetiology and severity,with or without a history of variceal bleeding,and aged≥18 years old were included in this *** randomized controlled trials(RCTs)that compared the efficacy of carvedilol and that of EVL for primary and secondary prevention of variceal bleeding and mortality in patients with cirrhosis and portal hypertension were considered,irrespective of publication status,year of publication,and *** Seven RCTs were *** four trials assessing the primary prevention,no significant difference was found on the events of variceal bleeding(RR:0.74,95%CI:0.37-1.49),all-cause mortality(RR:1.10,95%CI:0.76-1.58),and bleedingrelated mortality(RR:1.02,95%CI:0.34-3.10)in patients who were treated with carvedilol compared to *** three trials assessing secondary prevention,there was no difference between two interventions for the incidence of rebleeding(RR:1.10,95%CI:0.75-1.61).The fixed-effect model showed that,compared to EVL,carvedilol decreased all-cause mortality by 49%(RR:0.51,95

关键词： Carvedilol Liver cirrhosis Variceal hemorrhage Portal hypertension Prophylaxis

A Robust Hybrid Multisource Data Fusion Approach for Vehicle Localization

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Positioning 2013年第4期4卷 271-281页

作者： adda Redouane Ahmed Bacha Dominique Gruyer Alain Lambert The French Institute of Science and Technology for Transport Development and Networks (IFSTTAR) COSYS Department LIVIC Laboratory 77 rue des Chantiers Versailles France.

In this paper, an innovative collaborative data fusion approach to ego-vehicle localization is presented. This approach called Optimized Kalman Swarm (OKS) is a data fusion and filtering method, fusing data from a low cost GPS, an INS, an Odometer and a Steering wheel angle encoder. The OKS is developed addressing the challenge of managing reactivity and robustness during a real time ego-localization process. For ego-vehicle localization, especially for highly dynamic on-road maneuvers, a filter needs to be robust and reactive at the same time. In these situations, the balance between reactivity and robustness concepts is crucial. The OKS filter represents an intelligent cooperative-reactive localization algorithm inspired by dynamic Particle Swarm Optimization (PSO). It combines advantages coming from two filters: Particle Filter (PF) and Extended Kalman filter (EKF). The OKS is tested using real embedded sensors data collected in the Satory’s test tracks. The OKS is also compared with both the well-known EKF and the Particle Filters (PF). The results show the efficiency of the OKS for a high dynamic driving scenario with damaged and low quality GPS data.

关键词： Localization Mobile Robotic Kalman Filter EKF Particle Swarm Optimization PSO Particle Filter Data Fusion Vehicle Positioning Navigation GPS

OKPS: A Reactive/Cooperative Multi-Sensors Data Fusion Approach Designed for Robust Vehicle Localization

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Positioning 2016年第1期7卷 1-20页

作者： adda Redouane Ahmed Bacha Dominique Gruyer Alain Lambert Department COSYS IFSTTAR LIVIC Versailles France IEF/UMR CNRS 8622 Université Paris-Sud Centre d’Orsay Orsay France

This paper presents the Optimized Kalman Particle Swarm (OKPS) filter. This filter results from two years of research and improves the Swarm Particle Filter (SPF). The OKPS has been designed to be both cooperative and reactive. It combines the advantages of the Particle Filter (PF) and the metaheuristic Particle Swarm Optimization (PSO) for ego-vehicles localization applications. In addition to a simple fusion between the swarm optimization and the particular filtering (which leads to the Swarm Particle Filter), the OKPS uses some attributes of the Extended Kalman filter (EKF). The OKPS filter innovates by fitting its particles with a capacity of self-diagnose by means of the EKF covariance uncertainty matrix. The particles can therefore evolve by exchanging information to assess the optimized position of the ego-vehicle. The OKPS fuses data coming from embedded sensors (low cost INS, GPS and Odometer) to perform a robust ego-vehicle positioning. The OKPS is compared to the EKF filter and to filters using particles (PF and SPF) on real data from our equipped vehicle.

关键词： Localization Mobile Robotic Extended Kalman Filter Particle Swarm Optimization Particle Filter Data Fusion Vehicle Positioning GPS

Security and performance evaluation of master node protocol based reputation blockchain in the bitcoin network

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Blockchain(Research and Applications) 2022年第1期3卷 49-64页

作者： Muntadher Sallal Gareth Owenson Dawood Salman Mo adda Bournemouth University PooleDorsetBH125BBUK Cyber Espion Ltd. Port SolentHampshirePO64TYUK University of Portsmouth PortsmouthHampshirePO12UPUK University of Kufa KufaNajaf GovernorateIraq

Bitcoin is a digital currency based on a peer-to-peer network to propagate and verify *** is gaining wider adoption than any previous ***,the mechanism of peers randomly choosing logical neighbours without any knowledge about the underlying physical topology can cause a delay overhead in information propagation which makes the system vulnerable to double spend *** at alleviating the propagation delay problem,this paper introduces a proximity-aware extension to the current Bitcoin protocol,named Master Node Based Clustering(MNBC).The ultimate purpose of the proposed protocol,which is based on how clusters are formulated and how nodes can define their membership,is to improve the information propagation delay in the Bitcoin *** the MNBC protocol,physical internet connectivity increases as well as the number of hops between nodes decreases through assigning nodes to be responsible for maintaining clusters based on physical Internet ***,a reputation-based blockchain protocol is integrated with MNBC protocol in order to securely assign a master node for every *** validate our proposed methods through a set of simulation experiments and the findings show how the proposed methods run and their impact in optimising the transaction propagation delay.

关键词： Information propagation delay Network clustering Bitcoin network Reputation blockchain

剪力墙和薄壁开口截面作为支撑的高层建筑抗震计算的简化方法

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钢结构 2008年第6期23卷 93-93页

作者： Sid Ahmed Meftah Abdelouahed Tounsi adda bedia el Abbas

对高度方向性能恒定,不对称的建筑结构,提出了近似的抗震分析手算方法。通过剪力墙和薄壁开口截面结构的结合,增加了建筑物的刚度。基于连续技术和达朗伯原理,推导了自由振动的控制方程和相应的特征值问题。应用伽辽金技术,提出了一个... 详细信息

对高度方向性能恒定,不对称的建筑结构,提出了近似的抗震分析手算方法。通过剪力墙和薄壁开口截面结构的结合,增加了建筑物的刚度。基于连续技术和达朗伯原理,推导了自由振动的控制方程和相应的特征值问题。应用伽辽金技术,提出了一个通用的方法对剪力墙和薄壁开口截面结构的耦合振动进行自由振动分析。给出了地震荷载下计算建筑结构循环频率和内力的简化公式。实例验证了方法的适用性和精确性,所提出的方法与有限元计算进行了比较。

关键词：高层建筑特征频率连续法薄壁结构耦合振动内力

自编适用于意大利一年级学生的汉语教材：我的编写思路及教学建议

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自编适用于意大利一年级学生的汉语教材：我的编写思路及教学建议

作者：怡兰(D’adda Ilaria) 浙江大学

学位级别：硕士

本论文的主体内容是作者作为意大利籍汉语国际教育硕士生,在双语和跨文化的知识基础上,同时也在自己亲历的汉语教学实践经验基础上,为意大利初学汉语的儿童们,编写了一本适合他们的中文入门教材。论文主要内容分为两部分,第一部分讨论... 详细信息

本论文的主体内容是作者作为意大利籍汉语国际教育硕士生,在双语和跨文化的知识基础上,同时也在自己亲历的汉语教学实践经验基础上,为意大利初学汉语的儿童们,编写了一本适合他们的中文入门教材。论文主要内容分为两部分,第一部分讨论教材编写的目标和理由。首先简单论述汉语教材编写的“国别化”是一个发展趋势,目前针对意大利人学汉语需要的国别教材仍十分缺乏,针对意大利儿童的汉语教材则完全是空白。论文在第一部分也陈述了自编新教材的教学目标、基本原则和教学建议等。说明考虑到意大利语与汉语的差异,本教材的教学目标重点在于引导意大利小学生的正确汉语发音和对汉字结构的初步认识。教材编写者认为意大利小学生若先学好了这两个内容,日后的汉语系统化学习如汉语语法和汉字记忆及书写等,肯定会容易很多。因此,本教材主要采用的教学方法是TPR(全身反应法) 和游戏教学法,还有适合意大利语发音的绕口令教学法。教材编写者认为学习中文对意大利儿童的发展和发育都很有好处。论文的第二部分就是作者精心编写和绘制的、适合意大利儿童的汉语教材。教材分15节课,旨在利用儿童对新知识的好奇心、敏感性和灵活性,自然而然地学会中文。

关键词：对外汉语教材国别化意大利

十二指肠溃疡胃神经内分泌细胞的超微图像定量研究

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新消化病学杂志 1996年第3期4卷 128-129页

作者：虞积耀 D'adda T 海军总医院病理科北京市100037 意大利Parma大学

目的探讨胃神经内分泌细胞(NE)在十二指肠溃疡中的变化。方法对8例正常胃及6例十二指肠溃疡(DU)胃粘膜的 NE 细胞应用透射电镜进行分类,并应用超微图像分析仪对 NE 细胞各种参数进行定量测量。结果发现正常胃窦及胃体 NE 细胞密度分别为... 详细信息

目的探讨胃神经内分泌细胞(NE)在十二指肠溃疡中的变化。方法对8例正常胃及6例十二指肠溃疡(DU)胃粘膜的 NE 细胞应用透射电镜进行分类,并应用超微图像分析仪对 NE 细胞各种参数进行定量测量。结果发现正常胃窦及胃体 NE 细胞密度分别为1.6%及0.9%,DU 为1.3%及0.8%(P>0.05)。正常及 DU 中胃窦 G 细胞分别占65%及46%(P>0.05),D 细胞分别占9.5%及3%(P<0.05)。胃体 ECL 细胞分别占30%及49%(P<0.05);D 细胞占22%及2%(P<0.01);EC 细胞分别占7%及4%(P<0.05)。D细胞的单位计数明显降低(P<0.01),胞浆比例增大(P<0.05)。结论十二指肠溃疡患者胃泌素升高可能与 D细胞减少,分泌生长抑素降低,对 G 细胞分泌胃泌素的抑制作用下降有关。

关键词：十二指肠溃疡胃神经内分泌细胞超微图像