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931.
Hyperthermia is an aid to standard cancer therapy. The aim is to heat up a tumour region inside the patient's body with the help of microwave radiation. The microwayes are generated by some suitable antenna array. Here we investigate the control properties of such antenna configurations and determine their resolution capabilities. We will define the hyperthermia operator, which can produce every field of any antenna array up to any degree of accuracy. We shall see that this operator is compact and we are able to compute a singular system under general assumptions explicitly. This, together with a detailed knowledge of the decay of the singular values, constitutes the tools with which we treat the previously stated problems. We examine the propagation of microwave radiation in homogeneous media and then carry over the results obtained to the case of inhomogeneous media. 相似文献
932.
Varvara Paderno Vladimir Filippov Alfred Liashchenko 《Journal of solid state chemistry》2004,177(2):523-528
We studied the directional crystallization of different compositions in B4C-NbB2 and B4C-MoB2 systems. The eutectic compositions for both systems are evaluated. It is shown that in the first system the rod-like eutectic structure is formed, in second, the “Chinese hieroglyphics”. In both cases high hardness and high microplasticity are observed, which are much more than for individual component phases. These compositions may be considered as a new kind of self-strengthening composite materials. 相似文献
933.
934.
Alfred Geroldinger 《Mathematische Zeitschrift》1990,205(1):159-162
Ohne Zusammenfassung 相似文献
935.
Alfred Karpfen 《International journal of quantum chemistry》1981,19(6):1207-1214
The various computational procedures for treating the problem of lattice summations in ab initio crystal orbital calculations are briefly reviewed and the cutoff problem is discussed. Several numerical examples are presented for demonstrating the fast convergence of the total energy per unit cell with respect to the inclusion of further neighbors' interactions, in case reasonable cutoff procedures are applied. The importance of electrostatic considerations for the interpretation of long range effects is stressed. 相似文献
936.
By nucleophilic addition of 2-aminoadamantane to the appropriate isothiocyanates the following N-(2-Adamantyl)thio- 相似文献
937.
Alfred Wiedemann 《manuscripta mathematica》1987,59(2):187-207
The classification of the Auslander-Reiten quivers of the local orders of finite lattice type is completed. For this purpose, it is shown—using the results of [7]—that to the list of the known Auslander-Reiten quivers of the local Bäckström orders of finite lattice type [11], [14] and of the local Gorenstein orders of finite type and their minimal overorders [18] one has to add two remaining types of valued translation quivers to obtain a complete list of all Auslander-Reiten quivers of the local orders of finite lattice type. 相似文献
938.
939.
940.