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71.
Amine‐functionalized mesoporous silica: A material capable of CO2 adsorption and fast regeneration by microwave heating 下载免费PDF全文
Hakan Nigar Beatriz Garcia‐Baños Felipe L. Peñaranda‐Foix Jose M. Catalá‐Civera Reyes Mallada Jesus Santamaría 《American Institute of Chemical Engineers》2016,62(2):547-555
The surface of ordered mesoporous (MCM‐48) silica has been subjected to covalent grafting with silane molecules containing one to three amino groups. The dielectric properties of the materials were studied in detail, and the functionalized materials were used for CO2 adsorption at room temperature, followed by regeneration under either conventional heating or microwave irradiation. It has been found that, as the intensity of functionalization with amino groups increases (from mono‐ to tri‐amino silanes) both the CO2 load and the dielectric response at microwave frequencies increase. In particular, functionalization with a tri‐amino silane derivative gave the highest CO2 adsorption and the fastest microwave heating, resulting in a fourfold acceleration of adsorbent regeneration. The grafted material was fully stable for at least 20 adsorption‐regeneration cycles, making it an ideal candidate for microwave‐swing adsorption (MWSA) processes. © 2015 American Institute of Chemical Engineers AIChE J, 62: 547–555, 2016 相似文献
72.
Deepti Tikariha Birendra Kumar Namrata Singh Kallol K. Ghosh Pierluigi Quagliotto 《Journal of surfactants and detergents》2011,14(4):555-562
The micellization behavior of gemini surfactants i.e. alkanediyl-α,ω-bis(cetyldimethylammonium bromide) (C16-s-C16,2Br− where s = 3, 4, 10) in 10% (v/v) ethylene glycol solution was investigated by surface tension and conductometric measurements at
300 K. The critical micelle concentration, degree of micellar ionization, surface excess concentration, minimum surface area
per molecule of surfactant, surface pressure at the CMC and Gibbs energy of adsorption of the dimeric surfactants have also
been determined in the presence of different salts (NaCl, NaBr and NaI). The critical micelle concentration and degree of
micellar ionization values decrease significantly in the presence of sodium halides and follows the sequence NaCl < NaBr < NaI.
The free energy, enthalpy and entropy of micellization of dimeric surfactants in 10% (v/v) ethylene glycol solution were determined
using the temperature dependence of the critical micelle concentration. The standard free energy of micellization was found
to be negative in all the cases. 相似文献
73.
74.
This paper is centred on one of the main results of the ELeGI project, namely its software architecture for the delivery of
personalised formal-learning experiences. The architecture has been designed and developed: (1) taking into account a general
model for the personalisation of learning experiences, allowing us to obtain a solution that is flexible with respect to the
pedagogies, and (2) on top of service oriented grid technologies, allowing us to obtain several advantages in the process
of creation and delivery of personalised learning experience like, for instance, ubiquitous and seamless access to heterogeneous
learning resources distributed over the network. In order to validate our result, the first prototype of the ELeGI architecture
has been deployed on a virtual organisation consisting of three geographically distributed nodes. Each node of the VO provides
services and learning resources that have been adopted in the creation and delivery of a personalised learning experience
about the Torricelli’s law and based on the virtual scientific experiment model. The case of study has been successfully executed
and has given us a proof of our assumptions related to the added value of the service oriented grid mainly in terms of: (1)
capabilities to access educational resources distributed over the network, that is relevant in achieving the personalisation
of learning experiences, and (2) high level of dynamicity and adaptiveness in the creation and delivery processes of a personalised
learning experience.
相似文献
Pierluigi RitrovatoEmail: |
75.
Geev Mokryani Pierluigi Siano Antonio Piccolo 《Simulation Modelling Practice and Theory》2010,18(9):1412-1424
The aim of this paper is to develop a method based on S-transform and Support Vector Machine (SVM) for ferroresonance detection. Using this method ferroresonance can be discriminate from other transients such as capacitor switching, load switching and transformer switching. S-transform (ST) is used for decomposition of signals, feature selection is done by Kernel Principal Component Analysis (KPCA). SVM is used for classification. Ferroresonance data and other transients were obtained by simulation using EMTP program. Results show that the proposed procedure is efficient in identifying ferroresonance from other events. 相似文献
76.
Pierluigi Plebani Cinzia Cappiello Marco Comuzzi Barbara Pernici Sandeep Yadav 《Software》2012,42(9):1075-1094
Mobile devices with their more and more powerful resources allow the development of mobile information systems in which services are not only provided by traditional systems but also autonomously executed and controlled in the mobile devices themselves. Services distributed on autonomous mobile devices allow both the development of cooperative applications without a back‐end infrastructure and the development of applications blending distributed and centralized services. In this paper, we propose MicroMAIS: an integrated platform for supporting the execution of Web service‐based applications natively on a mobile device. The MicroMAIS platform is composed of mAS and μ‐BPEL. The former allows the execution of a single Web service, whereas the latter permits the orchestration of several Web services according to the WS‐BPEL standard. Copyright © 2011 John Wiley & Sons, Ltd. 相似文献
77.
Vincenzo d’Alessandro Pierluigi GuerrieroSantolo Daliento Matteo Gargiulo 《Solid-state electronics》2011,63(1):130-136
A straightforward non-invasive method is proposed to accurately evaluate the shunt resistance of an elementary cell of a photovoltaic module connected in an installed string without requiring prior knowledge of the parameters of the intrinsic diodes. The approach relies on the measurement of the current-voltage characteristic of the whole string after intentionally shading the selected cell. Calibrated PSPICE simulations are employed to illustrate the method and test its reliability. As a case study, the shunt resistances of several cells belonging to a series array of 10 commercial panels are determined. 相似文献
78.
Analysis of the transverse heat transfer coefficients in a dual channel ITER-type cable-in-conduit conductor 总被引:1,自引:0,他引:1
This paper describes a new method to determine the equivalent heat transfer coefficients, i.e., radial and azimuthal, in CICC’s with parallel cooling channels. The method is based on the measurement of the steady state temperature response to a step heating. The experiment is modelled by a set of transport equations for the temperature distribution that contain explicitly the parametric dependence on the transverse heat transfer coefficients. The equations are solved analytically and the values of the equivalent transverse heat transfer coefficients are obtained as the best fit of the experimental temperature distributions. We show the results obtained with the method by application to a short length sample experiment in the SULTAN test facility using an ITER-type CICC with special instrumentation, and with heaters to generate a variety of heat slugs. The values of heat transfer coefficient are consistent with expected values, based in particular on the theory of dispersion in porous media. 相似文献
79.
Norikiyo Koizumi Yoshikazu TakahashiYoshihiko Nunoya Kunihiro MatsuiToshinari Ando Hiroshi TsujiKiyoshi Okuno Katsunori Azuma Albert Fuchs Pierluigi BruzzoneGeorge Vecsey 《低温学》2002,42(11):675-690
In the framework of ITER-EDA, a 13 T-46 kA Nb3Al conductor with stainless steel jacket has been developed in order to demonstrate applicability of an Nb3Al conductor with react-and-wind technique to ITER-TF coils. Using a 3.5 m sample consisting of a pair of conductors with 0% and 0.4% bending strain, the critical current performances of the Nb3Al conductors were studied to verify that the conductor achieves the expected performance and the bending strain of 0.4% does not originate degradation. The critical currents were measured at background magnetic fields of 7, 9, 10 and 11 T at temperatures from 6 to 9 K. The expected critical currents were evaluated taking into account the variation of the strain in the cross-section due to the bending strain as well as self-field and non-uniform current distribution as results of an imbalance in the joint resistance and inductances. The calculation results indicate that the current distribution is almost uniform and the experimental results showed good agreement with the expected critical currents. Accordingly, we can conclude that the fabrication process of this conductor is appropriate and the react-and-wind technique using the Nb3Al conductor is applicable to ITER-TF coils. In addition, the critical current of the Nb3Al conductor is expected to be 108 kA at 13 T and 4.5 K, resulting in a sufficient margin against the nominal current of 46 kA. Furthermore, it was found that the decrease in the critical current by thermal strain can be made small by applying the bending strain to the conductor so as to reduce the compressive strain at higher fields, i.e. inner side of the coil, in the conductor cross-section. 相似文献
80.
Augusto Celentano Pierluigi Della Vigna Carlo Ghezzi Dino Mandrioli 《Computer Languages, Systems and Structures》1980,5(2):103-114
A program development system (PDS) should support a smooth transition between design, development, debugging, testing and final production of a software system. Man-machine interaction, though necessary, should not allow the user to modify the program or its execution state in an unstructured way; rather, disciplined interaction should be enforced by the PDS. After a review of the most desirable features of a PDS, the underlying philosophy of SIMPLE, a PDS which supports the development of Pascal programs, is introduced. The general structure of the SIMPLE system and the basic implementation choices are also discussed. 相似文献