Fraissard jacques (62 risultati)

XII, 685 p. Hardcover. Einband bestoßen, daher Mängelexemplar gestempelt, sonst sehr guter Zustand. Imperfect copy due to slightly bumped cover, apart from this in very good condition. Stamped. NATO science series; II: Mathematics, physics and chemistry, 219. Sprache: Englisch.

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Hardcover. Condizione: new. Hardcover. The study of physical adsorption has economic and technical value, while continuing to present scientific challenges. During recent years three significant trends have become manifest: significant theoretical advances; instrumental developments allowing detailed characterization of materials, including microporous solids; and the realization that closer coupling of scientific and technological lines of enquiry can lead to both greater scientific understanding and better technology. Topics covered in this text include: progress in theoretical analysis; breakthroughs in experimentation; the unique aspects of transport in micropores; and the application of physical absorption in industrial processes. Specialized workers and university lecturers may find material in the book useful for introductory or graduate courses. The literature references point to further detailed studies. Topics covered in this text include: progress in theoretical analysis; breakthroughs in experimentation; the unique aspects of transport in micropores; and the application of physical adsorption in industrial processes. Shipping may be from our Sydney, NSW warehouse or from our UK or US warehouse, depending on stock availability.…

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Condizione: New. pp. 306.

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Condizione: New. pp. 685 1st Edition.

Condizione: Sehr gut. Zustand: Sehr gut | Seiten: 292 | Sprache: Englisch | Produktart: Bücher | Nuclear quadrupole resonance (NQR) a highly promising new technique for bulk explosives detection: relatively inexpensive, more compact than NMR, but with considerable selectivity. Since the NQR frequency is insensitive to long-range variations in composition, mixing explosives with other materials, such as the plasticizers in plastic explosives, makes no difference. The NQR signal strength varies linearly with the amount of explosive, and is independent of its distribution within the volume monitored. NQR spots explosive types in configurations missed by the X-ray imaging method.But if NQR is so good, why it is not used everywhere? Its main limitation is the low signal-to-noise ratio, particularly with the radio-frequency interference that exists in a field environment, NQR polarization being much weaker than that from an external magnetic field. The distinctive signatures are there, but are difficult to extract from the noise. In addition, the high selectivity is partly a disadvantage, as it is hard to build a multichannel system necessary to cover a wide range of target substances. Moreover, substances fully screened by metallic enclosures, etc. are difficult to detect. A workshop was held at St Petersburg in July 2008 in an attempt to solve these problems and make NQR the universal technique for the detection of bombs regardless of type. This book presents the essentials of the papers given there.…