Fan structure

Fig. 3. Rough layout sketch (/) the two fined heaters F-l and F-2 are located together but are separated from the other equipment with a subpipeway connecting the process area to the heater area (2) the reboiler E-2 is located adjacent to its column, T-l. The preheat exchanger E-4 is located adjacent to tower T-3 (3) the elevated overhead condenser E-3 is located next to the overhead accumulator V-l. Also, the air condenser FF-3 is located adjacent to its overhead accumulator V-2 (4) the rest of the air coolers (FF-1—3, -5) are grouped together in a common fan structure (3) all equipment and related piping is routed to and from the existing piperack saving the addition of a new piperack (6) all pumps (P-1—P-6) are located in a row under the piperack, and each...

Above Tc = 19 K, the magnetization curves of Strandburg (1962) and Feron (1970) reflect the standard spiral-> fan-> ferromagnetic structures produced by fields in the basal plane. At temperatures above 35 K, Koehler et al. (1967) detected a number of intermediate fan structures which are clearly evident in the magnetization data the h-axis isotherms at 30, 50.2 and 65.2 K show one, two and three critical fields, respectively (fig. 6.7). 

Fig. 6.11. Results of Feron et al. (1970) for the u-axis magnetization of erbium. The spiral-transition at Hd is followed by a transition at between two fan structures.

The rare earth metals exhibit a variety of ordered states from ferromagnetic to complicated antiferromagnetic structures collinear, spiral, helical, conical and fan structures, which can be altered by temperature, magnetic fields or by the application of pressure (Nikitin et al., 1972). These complicated arrangements of spins result from the balance in energy between magnetocrystalline anisotropy and exchange forces (Elliott, 1965). Much pressure work has been done on pure rare earth metals and alloys in the last decade especially, and measurements... 

Z. Yang and Y. Fan, Structural Characterization of Alginate Derived Oligo-Mannuronates by Different Preparation Methods , Zhongguo Shenghua Yaowu Zazhi, 2007, 28, 69. 

When a helimagnetic structure is submitted to a field applied along one direction of the plane of the moments, for a field larger than a critical value the structure becomes a fan structure (fig. 120). The regular rotation of the moment in the helimagnetic arrangement... 

When a magnetic field is applied in the plane of a helical structure, an intermediate phase can be stabilized in a small field range before the fan structure is reached, this latter closing progressively toward the ferromagnetic state. This intermediate phase is called the helifan structure. Such a phase has been recently discovered in Ho (fig. 124) and Dy from a careful neutron diffraction investigation (Jensen and Mackintosh 1992). 

The results of the calculation of the cp T) dependence made by Kaino and Kasuya (1981) are in fairly good agreement with experiment. The authors related the observed increase of near Tc in Tb (see fig. 8) with the existence of the fan structure. As one can see Irom fig. 8 this tendency increases under pressure. This may imply a reduction of the size of the flat sheets under pressure. 

H. Lu, Y. Hu, M. Li, Z. Chen, and W. Fan, Structure characteristics and thermal properties of silane-grafted-polyethylene/clay nanocomposite prepared by reactive extrusion. Compos. Sci. Technol. 66(15), 3035-3039 (December, 2006). 

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