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81.
Giuseppe Ferri Vincenzo Stornelli 《Analog Integrated Circuits and Signal Processing》2006,47(3):293-301
In this work we present an integrated interface for wide range resistive gas sensors able to heat the sensor resistance through
a constant power heater block at 0°C–350°C operating temperatures. The proposed temperature control system is formed by a
sensor heater (which fixes the sensor temperature at about 200°C), a R/f (or R/T) converter, which converts the resistive value into a period (or frequency), and can be able to reveal about 6 decades variation
(from 10 KΩ up to 10 GΩ), and a digital subsystem that control the whole systems loop. This interface allows high sensibility
and precision and performs good stability in temperature and power supply drift and low power characteristics so it can be
used also in portable applications. Test measurements, performed on the fabricated chip, have shown an excellent agreement
between theoretical expectations and simulation results.
Giuseppe Ferri is an associate professor in Electronics at the Department of Electrical Engineering of L’ Aquila University, Ital. In 1993
he has been a visiting researcher at SGS-Thomson Milano, working in bipolar low-voltage op-amp design. In 1994-95 he has been visiting researcher at KU Leuven working in low-voltage CMOS design in the group of Prof. Sansen. His research activity is actually centred on the analog
design of integrated circuits for portable applications (e.g., sensors and biomedicals) and circuit theory. He is co-author
of a book entitled “Low Voltage, Low Power CMOS Current Conveyors”, Kluwer ed. (2003) and four text-books in Italian on Analogue Microelectronics (2005, 2006). Moreover, he is author and
co-author of 74 papers on international and Italian journals and 123 talks at national and international conferences.
Vincenzo Stornelli was born in Avezzano (AQ), Italy, on May 31, 1980. He received the Electronics Engineering degree (cum laude) in July 2004.
In October 2004 he joined the Department of Electronic Engineering, University of L’Aquila, where he is actually involved
with problems concerning project and design of integrated circuits for RF and sensor applications, CAD modelling, characterization,
and design analysis of active microwave components, circuits, and subsystems. He regularly teaches courses of the European
Computer patent and has regular collaborations with national corporations such as Thales Italia 相似文献
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84.
Aerosol lidar intercomparison in the framework of the EARLINET project. 1. Instruments 总被引:1,自引:0,他引:1
Matthais V Freudenthaler V Amodeo A Balin I Balis D Bösenberg J Chaikovsky A Chourdakis G Comeron A Delaval A De Tomasi F Eixmann R Hågård A Komguem L Kreipl S Matthey R Rizi V Rodrigues JA Wandinger U Wang X 《Applied optics》2004,43(4):961-976
In the framework of the European Aerosol Research Lidar Network to Establish an Aerosol Climatology (EARLINET), 19 aerosol lidar systems from 11 European countries were compared. Aerosol extinction or backscatter coefficient profiles were measured by at least two systems for each comparison. Aerosol extinction coefficients were derived from Raman lidar measurements in the UV (351 or 355 nm), and aerosol backscatter profiles were calculated from pure elastic backscatter measurements at 351 or 355, 532, or 1064 nm. The results were compared for height ranges with high and low aerosol content. Some systems were additionally compared with sunphotometers and starphotometers. Predefined maximum deviations were used for quality control of the results. Lidar systems with results outside those limits could not meet the quality assurance criterion. The algorithms for deriving aerosol backscatter profiles from elastic lidar measurements were tested separately, and the results are described in Part 2 of this series of papers [Appl. Opt. 43, 977-989 (2004)]. In the end, all systems were quality assured, although some had to be modified to improve their performance. Typical deviations between aerosol backscatter profiles were 10% in the planetary boundary layer and 0.1 x 10(-6) m(-1) sr(-1) in the free troposphere. 相似文献
85.
Albanese Massimiliano Chianese Angelo Moscato Vincenzo Sansone Lucio 《Multimedia Tools and Applications》2004,24(3):253-272
The first step in a video indexing process is the segmentation of videos into meaningful parts called shots. In this paper we present a formal model of the video shot segmentation process. Starting from a mathematical characterization of the most common transition effects, a video segmentation algorithm capable to detect both abrupt and gradual transitions is proposed. The proposed algorithm is based on the computation of an arbitrary similarity measure between consecutive frames of a video. The algorithm has been tested adopting a similarity metric based on the Animate Vision theory and results have been reported. 相似文献
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87.
Nanocapsules: Ultrastable Liquid–Liquid Interface as Viable Route for Controlled Deposition of Biodegradable Polymer Nanocapsules (Small 22/2016) 下载免费PDF全文
88.
Ultrastable Liquid–Liquid Interface as Viable Route for Controlled Deposition of Biodegradable Polymer Nanocapsules 下载免费PDF全文
Raffaele Vecchione Giulia Iaccarino Paolo Bianchini Roberto Marotta Francesca D'autilia Vincenzo Quagliariello Alberto Diaspro Paolo A. Netti 《Small (Weinheim an der Bergstrasse, Germany)》2016,12(22):3005-3013
Liquid–liquid interfaces are highly dynamic and characterized by an elevated interfacial tension as compared to solid–liquid interfaces. Therefore, they are gaining an increasing interest as viable templates for ordered assembly of molecules and nanoparticles. However, liquid–liquid interfaces are more difficult to handle compared to solid–liquid interfaces; their intrinsic instability may affect the assembly process, especially in the case of multiple deposition. Indeed, some attempts have been made in the deposition of polymer multilayers at liquid–liquid interfaces, but with limited control over size and stability. This study reports on the preparation of an ultrastable liquid–liquid interface based on an O/W secondary miniemulsion and its possible use as a template for the self‐assembly of polymeric multilayer nanocapsules. Such polymer nanocapsules are made of entirely biodegradable materials, with highly controlled size—well under 200 nm—and multi‐compartment and multifunctional features enriching their field of application in drug delivery, as well as in other bionanotechnology fields. 相似文献
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Metabolic P (MP) grammars are a particular class of multiset rewriting grammars introduced in the MP theory for modelling metabolic processes. In this paper, a new algebraic formulation of inverse problems, based on MP grammars and Kronecker product, is given, for further motivating the correctness of the LGSS (Log-Gain Stoichiometric Stepwise) algorithm, introduced in 2010s for solving inverse problems in the MP framework. At the end of the paper, a section is included that introduces the problem of multicollinearity, which could arise during the execution of LGSS, and that defines an algorithm, based on a hierarchical clustering technique, that solves it in a suitable way. 相似文献