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Ruth Ippoliti 《家庭与家教》2002,(5):19-19
“越洋专递”栏目甫一亮相,反响热烈。我们陆续收到了南京、太原、合肥等地同学的来信,孩子们和他们的父母通过各种方式表达了结交异国笔友的美好愿望。经过认真挑选,来自山西省太原市五中的李楠成为第一位幸运儿,本刊下期将刊登她的个性档案及写给美国小姑娘Demi的信。我们已和美国加州John Glenn中学取得联系,美国学生对此也很重视,不仅信中附有照片,有的还寄来可爱的小礼物。有兴趣的同学可填写笔友登记表,我们将针对你的情况,按照你的要求为你推荐笔友,并不定期地登载互通的信件及笔友通讯录。来信可附近照。在适当的时候。本刊将举办中美学生互访和夏令营活动,进一步缩短东西方的距离。本刊将为你搭起一座七彩桥,帮助你了解异域文化,结识异国笔友,和同龄人互相学习,携手共进。 相似文献
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This paper proposes a sensorless fault-tolerant control strategy solving the tracking problem of the maximum delivered power characteristic for a wind energy conversion system equipped with a permanent magnet synchronous generator. A previously published control scheme ensuring the maximum power efficiency of the wind turbine, not requiring feedback information about rotor speed and position, and about wind velocity, is here extended to make the control scheme fault-tolerant with respect to possible electrical faults affecting the equations of the permanent magnet synchronous generator (PMSG) in the original (α, β) frame. The control law is based on a number of interconnected nonlinear observers. Closed loop asymptotic vanishing of the observation errors is proved. The proposed control solution has been validated on the National Renewable Energy Laboratory (NREL) 5-MW three-blade wind turbine model. 相似文献
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Cinthya Ippoliti 《International Information and Library Review》2017,49(4):304-309
Utilizing the concepts of change management and intentional change theory, this column delves into the issues facing new liaison roles and provides tips for those who are undergoing a similar process through a lens of organizational change that addresses reviewing what is working, as well as what is not, developing a clear vision and direction, breaking down the change into smaller segments, cultivating a sense of identity through shared purpose, and supporting new habits. 相似文献
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Cinthya Ippoliti 《Public Services Quarterly》2013,9(3):177-192
Customer service is a core component of user experience and an important element in making patrons feel welcomed and valued within our libraries. At the University of Maryland Libraries, we took on the challenging task of creating a customer service training curriculum for all staff working at public service points and offering a digital badge for successful completion of a non-credit course. This article will detail our sometimes difficult, often uncertain, but ultimately worthwhile process of determining training needs and creating this course as we incorporate customer service into the daily work of our employees. 相似文献
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Luca Cavanini Gionata Cimini Gianluca Ippoliti 《Journal of The Franklin Institute》2019,356(4):2015-2030
Current Mode Control (CMC) is the standard approach to regulate DC-DC power converters in high performance applications, allowing to obtain a faster time-response and better closed-loop stability if compared to Voltage Mode Control (VMC). In the last decade, several algorithms have been proposed to improve standard CMC, most of them requiring to replace the original controller. However, it is common to have either analog or embedded CMC controllers which cannot be replaced easily in commercial power converters. Inspired by very recent results in the topic, this paper proposes a Model Predictive Control (MPC) external loop aimed at optimally modifying the set-point of a CMC loop to improve converter performance. The proposed configuration is directly applicable to any pre-compensated converter as it does not require changes on the already-in-place controller. Moreover, by leveraging a multi-rate implementation, the benefits of MPC are introduced in power conversion without affecting much the computational cost of the over-all control system, contrary to what would happen for a direct MPC implementation. Simulation and experimental results on a synchronous DC-DC buck converter, controlled by a standard CMC algorithm, confirm the benefits of the approach. 相似文献
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Participatory and anthropological studies have blended with library customer service design and feedback practices as ways to engage users in deeper and more meaningful conversations about their needs. Formal user studies can be cumbersome, expensive, and time consuming however. Sometimes asking a simple question will work just as effectively in uncovering user needs as other types of approaches. Taking this concept and applying it to the Oklahoma State University Library community resulted in a library-wide study in 2015. Researchers started with a simple question, “What if the library?,” and through interviews, online surveys, and a sticky-note wall, they found out the answer. 相似文献
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Cara Lynne Preuss Cinthya M. Saavedra 《International journal of qualitative studies in education》2013,26(7):901-921
This paper reanalyzed research previously conducted with Spanish-speaking childcare providers who participated in an educational literacy program. The women in the program were generally framed as the deficient other – illiterate, immigrant women. The authors used a critical framework and Chicana/Latina feminist methodologies, namely pláticas y encuentros (talks and encounters), to investigate, reanalyze, and reinterpret the data. Through the process, the authors not only revealed the inner flame of the participants in the study, but through the collision of their own worldviews, they also exposed more deeply the assumptions buried within their epistemologies, methodologies, and positionalities. The results speak to the importance of critical examinations of power and discourses in education that often reside unexamined, or perhaps examined but largely unpublished, in our research. 相似文献
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