In this paper, a triple-band planar absorber with high-impedance surface (HIS) is designed and fabricated. The absorber structure is composed of polyurethane foam sandwiched between a lossy sheet of frequency selective surfaces (FSS) and a perfect electric conductor. The lossy FSS possesses different resistances in a periodic composite unit as compared with typical HIS absorber. Losses in the FSS are introduced by printing the periodic composite square ring pattern on blank stickers using various resistive inks. Physical mechanism of the HIS absorbers is analyzed by equivalent circuit model and electric field distribution studies. The proposed absorber with periodic composite units offers superimposed triple-band absorption as compared with that of the single units having single- or dual-band absorption characteristics. The reflection loss measurements show that the 90% absorption bandwidth of the HIS absorber is increased by 42% by the proposed composite periodic units.

The Maoniuping REE deposit located in the northern section of the Panxi (Panzhihua and Xichang) rift zone of western margin of the Yangtze plate. It is by far the world's youngest discovered endogenous LREE deposit, and is also the world's third largest endogenous LREE deposit. Yanshanian alkaline granites are widely developed in Mianxi region, and the Maoniuping REE deposit hosts in the middle of Mianqi granite body. Surrounding rocks of REE ore body are nordmarkite and carbonatite. According to the output position, mineralization types, structure and other features, ore types of the Maoniuping REE deposit are designated as carbonatite type, pegmatite type, breccia type, and fine stockwork type. According to phase characteristics at room temperature and change of heating process, inclusions can be divided into three kinds: melt inclusions (M), melt fluid inclusions (ML) and fluid inclusions (L).

This article discusses a series of technologies of comprehensive utilization of coal resources,and puts forward countermeasures of comprehensive utilization of coal resources.These are benefical for comprehensive utilization of coal resources and maximize economic and social interests of coal resources.

Saidu gold deposit, located in back arc basin at south margin of the west Altay Mountain, is orogenic gold deposit. It is strictively controlled by ductile-shear zone, occurring in altered mylonite zone of Mar-kakol giant belt. The δ34S values of pyrite in the gold deposit range from 3.53‰ to 5.88‰; the lead isotopic compositions are fairly constant, with 206Pb/204Pb ranging from 18.010 to 18.359, 207Pb/204Pb ranging from 15.488 to 15.579, and 208Pb/204Pb ranging from 38.1116 to 38.3551. Sulfur and lead isotope studies indicated that ore-forming materials originated from the deep portion, and had close relationship with magmatic activity. The ore materials were obtained from rocks of the lower crust during the orogenic period; the main gold mineralization should have relations with tectonic extention settings of post-collision orogenic.