Suchergebnisse
Filter
Media filters
In: Advanced Onsite Wastewater Systems Technologies, S. 73-113
VISUAL FILTERS
In: Survey review, Band 2, Heft 9, S. 186-187
ISSN: 1752-2706
VISUAL FILTERS
In: Survey review, Band 2, Heft 9, S. 186-187
ISSN: 1752-2706
HISTORY FILTERS
In: Politija: analiz, chronika, prognoz ; žurnal političeskoj filosofii i sociologii politiki = Politeía, Band 62, Heft 3, S. 48-54
ISSN: 2587-5914
Adaptive digital filters
In: Vojnotehnicki glasnik, Band 50, Heft 1, S. 61-72
A Comment on "Elections as Filters"
In: Political research quarterly: PRQ ; official journal of Western Political Science Association, Pacific Northwest Political Science Association, Southern California Political Science Association, Northern California Political Science Association, Band 48, Heft 4, S. 729-740
ISSN: 1065-9129
A Comment on "Elections as Filters"
In: Political research quarterly: PRQ ; official journal of the Western Political Science Association and other associations, Band 48, Heft 4, S. 729
ISSN: 1938-274X
UV Filters: Challenges and Prospects
The use of sunscreens is an established and recommended practice to protect skin from solar-induced damage. Around 30 UV filters can be used in sunscreen products in the European Union, which ought to follow the requirements of the regulation 1223/2009 to ensure their efficacy and safety for humans. Nevertheless, low photostability and putative toxicity for humans and environment have been reported for some UV filters. Particularly, the negative impact in marine organisms has recently raised concern on the scientific community. Therefore, it is important to develop new UV filters with improved safety profile and photostability. Over the last two decades, nearly 200 new compounds have revealed promising photoprotection properties. The explored compounds were obtained through different approaches, including exploration of natural sources, synthetic pathways, and nanotechnology. Almost 50 natural products and around 140 synthetic derivatives, such as benzimidazoles, benzotriazoles, hydroxycinnamic acids, xanthones, triazines, among others, have been studied aiming the discovery of novel, effective, and safer future photoprotective agents. Herein, we provide the reader with an overview about UV filters' challenges and prospects, offering a forward-looking to the next-generation of UV filters.
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Nonlinear filters: estimation and applications
In: Lecture notes in economics and mathematical systems 400
Optimizing Nitrification On Biological Filters
In: Water and environment journal, Band 13, Heft 6, S. 406-412
ISSN: 1747-6593
ABSTRACTA recently developed nitrification model for biological filters has been applied to the design of three sites to increase nitrification. The first site was upgraded by the installation of a dedicated recirculation facility, the second by reconfiguration to double filtration, and the third by the installation of a chemical pre‐precipitation plant. All three sites responded well to the modifications and achieved compliance with ammoniacal nitrogen consents of 3–5 mg/l on a 95%oile basis. The key influence of hydraulic load on nitrification capacity and reliability was demonstrated on all three plants. The ability to upgrade existing biological filter installations to meet stringent ammoniacal nitrogen consents allows a significant reduction in environmental impact and revenue costs when compared with energy‐intensive options such as the activated‐sludge process.
COLOUR FILTERS AND SURVEYING INSTRUMENTS
In: Survey review, Band 3, Heft 16, S. 113-115
ISSN: 1752-2706
Application of vacuum belt press filters for cane mud filtration and performance comparison with rotary filters
In: Sugar industry, S. 298-301
Bois-Rouge factory, an 8000 t/d cane Reunionese sugarcane mill, has fully equipped its filtration station with vacuum belt press filters since 2010, the first one being installed in 2009. The present study deals with this 3-year experience and discusses operating conditions, electricity consumption, performance and optimisation. The comparison with the more classical rotary drum vacuum filter station of Le Gol sugar mill highlights advantages of vacuum belt press filters: high filtration efficiency, low filter cake mass and sucrose content, low total solids content in filtrate and low power consumption. However, this technology needs a mud conditioning step and requires a large amount of water to improve mud quality, mixing of flocculant and washing of filter belts. The impact on the energy balance of the sugar mill is significant. At Bois-Rouge mill, studies are underway to reduce the water consumption by recycling low d.s. filtrate and by dry cleaning the filter belts.
Harmonic distortion in microwave photonic filters
8871 8876 20 8 ; S ; This paper was published in OPTICS EXPRESS and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/OE.20.008871 . Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law We present a theoretical and experimental analysis of nonlinear microwave photonic filters. Far from the conventional condition of low modulation index commonly used to neglect high-order terms, we have analyzed the harmonic distortion involved in microwave photonic structures with periodic and non-periodic frequency responses. We show that it is possible to design microwave photonic filters with reduced harmonic distortion and high linearity even under large signal operation. © 2012 Optical Society of America. The authors wish to acknowledge the financial support given by the Research Excellency Award Program GVA PROMETEO 2008/09 and the FEDER Program "Instrumentacion Avanzada para Comunicaciones Opticas" with reference UPVOV08-3E-008. Rius Mercado, M.; Mora Almerich, J.; Bolea Boluda, M.; Capmany Francoy, J. (2012). Harmonic distortion in microwave photonic filters. Optics Express. 20(8):8871-8876. doi:10.1364/OE.20.008871 Capmany, J., & Novak, D. (2007). Microwave photonics combines two worlds. Nature Photonics, 1(6), 319-330. doi:10.1038/nphoton.2007.89 Yao, J. (2009). Microwave Photonics. Journal of Lightwave Technology, 27(3), 314-335. doi:10.1109/jlt.2008.2009551 Capmany, J., Ortega, B., & Pastor, D. (2006). A tutorial on microwave photonic filters. Journal of Lightwave Technology, 24(1), 201-229. doi:10.1109/jlt.2005.860478 Minasian, R. A., Alameh, K. E., & Chan, E. H. W. (2001). Photonics-based interference mitigation filters. IEEE Transactions on Microwave Theory and Techniques, 49(10), 1894-1899. doi:10.1109/22.954804 Bolea, M., Mora, J., Ortega, B., & Capmany, J. (2010). Photonic arbitrary ...
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