PV system auto-sizing with battery energy storage based on GPS coordinates

The paper presents a photovoltaic system auto sizing algorithm with irradiance and shading calculation, which uses the photovoltaic geographical information system database. This calculation step is a very labor intensive task, which require a lot of iterative design time to find the optimum alternative. Based on measurement data, monthly irradiance correction matrixes are simulated to completely describe the yearly irradiance loss caused by shading of the nearby objects. As result, a function between the shaded area and the yearly energy loss can be obtained. Furthermore, photovoltaic modules can be auto-allocated on a given area according to the boundary conditions. Taking into consideration the photovoltaic installers’ pricing system, a complete photovoltaic auto-sizing algorithm can be presented, which greatly reduces the time spent on quotation writing. This paper also includes a battery energy storage sizing algorithm according to the given economic conditions, which extends the capability of the photovoltaic system auto-sizing algorithm

Universal AAA for hybrid accesses

International audienceNowadays telecommunication operators which manage various network types are looking for convergence in different domains, from the access and aggregation to the core network. Moreover, in future 5G networks, the explosion of Internet of Things and the need of fixed and mobile convergence will imply strong requirements for more simplified and unified subscriber management. This will lead notably to seamless user experience when moving from a network to another. This paper proposes a pragmatic approach to operators for moving their networks smoothly to a really convergent subscriber data and session management system. It takes into account legacy mechanisms of subscriber management and introduces a universal Authentication, Authorization and Accounting (AAA) which aims at replacing progressively the legacy subscriber databases and helps in moving to a unified logical network element that will manage all subscriber's data and sessions. This paper illustrates the proposals with some use cases

Transforming Spontaneous Telegraphic Language to Well-Formed Greek Sentences for Alternative and Augmentative Communication

The domain of Augmentative and Alternative Communication (AAC) studies appropriate techniques and systems that enhance or accomplish the retaining or non-existing abilities for interpersonal communication. Some AAC users apply telegraphic language, as they attempt to speed up the interactive communication or because they are language impaired. In many AAC aids, a "sentence" is formulated by combining symbols of an icon-based communication system. To be accepted by the communication partner, the output should be a correct oral sentence of a natural language. In this paper we present our effort to develop a novel technique for expanding spontaneous telegraphic input to well-formed Greek sentences, by adopting a feature-based surface realization for Natural Language generation. We first describe the general architecture of the system that accepts compressed, incomplete, grammatically and syntactically ill-formed text and produces a correct full sentence. The NLP techniques of the two main modules, named preprocessor and translator/ generator, are then analyzed. A prototype system has been developed using Component Based Technology (CBT) which is under field evaluation by a number of speech-disabled users. Currently it supports fully the BLISS and MAKATON icon based communication systems. Some limitations of the module are also discussed along with possibilities for future expansions