As starting material, the La72Si28 amorphous ribbons were prepared from melt by rapid quenching method. The new metastable phase appeared when the amorphous sample was treated at 250℃ for 30 minutes. This phase has a ortborhombic structure with lattice parameters α=9.12lA, b=6.821A and c=3.833A, and exhibits superconducting transition at T, =3.02 K which is higher than those of all the known La-Si phases.
The line-annulus structure with special geological information, indicates a special geological unit with mineralization, indicates a system of geology, structure, magma and mineralization, constitutes a network of remote sensing image, be provided with both of the characteristics of image and geology.
There exists a doublet at 626/636cm -1 with energy difference about 10cm -1 in both n- and p-type 4H-SiC,which is similar to the doublet structure with the same energy difference founded in hexagonal GaN,ZnO, and AlN.
发现在 4 H- Si C的二级喇曼谱中存在能量差约为 10 cm- 1的双谱线结构 ,这一结构与六方相 Ga N,Zn O和 Al N的双谱线结构具有相同的能量差 .
acquisition control circuit adopts double CPU structure with ADSP as the main controller to realize the high speed data acquisition, signal processing and preliminary analysis, and with MCS51 as auxiliary CPU to realize the functions i.e. communication and man-machine interface.
On the base of analyzing the general input stage structure of the operational amplifier, this paper designed a novel kind of circuit structure with ultra-width common-mode range of bipolar input stages, making common-mode range not limited by supply voltage, settling the problems of input transistor saturation appeared in general input stages.
First we analyze modal characteristics of the structure with Finite Element Analysis(FEA),then based on parameters sensibility's analysis the structure modification for the milling machine's body is used for improving dynamic characteristics.
The strong swelling effect of SC-CO2 made polypyrrole (PPy) particles not only form on the surface, but also become incorporated into the film, resulting in a homogeneous structure with a relatively higher conductivity.
Results show that the title compound exhibits a typical mesoporous structure with the average pore size from 5 to 8 nm.
A morphological study of film chips (electron microscopy) showed that solvent evaporation results in the formation of a heterogeneous structure with interpenetrating pores (1-20 μm).
Formation of a structure with the 5"-flap containing the photoreactive group results in decrease of the level of protein labeling caused by cleavage of the photoreactive group due to FEN-1 endonuclease activity.
Tanacetan TVF was found to have a branched structure with a backbone of linear α-1,4-D-galacturonan.