Two monoclinic polymorphs of [Ag(NH3)2]MnO4 containing a unique coordination mode permanganate ions were prepared, and the high-temperature polymorph was used as precursor to synthesize pure AgMnO2. The hydrogen bonds between atoms ammonia detected by IR spectroscopy single-crystal X-ray diffraction. Under thermal decomposition, these induced solid-phase quasi-intramolecular redox reaction [Ag(...

Solid solutions in the Ba(Pb1?xSrx)O3?z system were prepared by aliovalent substitution of Pb4+ Sr2+ ions to investigate effect cation stoichiometry on thermal and electrical properties as x was varied between 0 0.4, temperature range 300–523 K. The starting compound, barium plumbate (BaPbO3), has a perovskite structure is known exhibit metallic conductivity due an overlap O2p nonbonding Pb–O s...

In this article various pipes used for transporting of gas are introduced and pros and cons of each one are elucidated. The pipes are categorized in three different subgroups including metallic, polymeric and metallic-wire reinforced polymeric pipes. Metallic-wire reinforced polymeric pipes are nominated as the best option for usage in high pressure pipelines transporting natural gas. As a resu...

microwave energy has potential for the efficient heating of minerals. minerals or materials, which couple to microwave energy are called dielectrics and many valuable minerals are found to be dielectric. the mineral ilmenite is one which shows good dielectric heating characteristics. in this paper, the effect of microwave heat energy on the partial reduction of oxidized ilmenite oxidized in ...

During summer, melt ponds have a significant influence on Arctic sea-ice albedo. The melt pond fraction (MPF) also has the ability to forecast the Arctic sea-ice in a certain period. It is important to retrieve accurate melt pond fraction (MPF) from satellite data for Arctic research. This paper proposes a satellite MPF retrieval model based on the multi-layer neural network, named MPF-NN. Our ...

Group detection is fundamentally important for analyzing crowd behaviors, and has attracted plenty of attention in artificial intelligence. However, existing works mostly have limitations due to the insufficient utilization of crowd properties and the arbitrary processing of individuals. In this paper, we propose the Multiview-based Parameter Free (MPF) approach to detect groups in crowd scenes...

We give an example of a geometry in which the electrostatic force between a point charge and a neutral metallic object is repulsive. The example consists of a point charge centered above a thin metallic hemisphere, positioned concave up. We show that this geometry has a repulsive regime using both a simple analytical argument and an exact calculation for an analogous twodimensional geometry. An...

Nb-doped lead zirconate titanate (PZT) films with up to 12 at. % of Nb were co-sputtered from oxide PZT and metallic targets at a substrate temperature 600 °C. Up 4 was doped into the perovskite structure formation B-site cation vacancies for charge compensation. The preferential (111) orientation decreased Nb-doping within solid solution region. ferroelectric response affected by large values ...

China, Vietnam, Brazil, and Russia have the largest deposits of rare earths. However, in recent works, occurrence light earth elements has been demonstrated an exhalative sedimentary type mineral (SEDEX) Mexico, with adequate Ce Nd contents. Additionally, it is this that used to study cation exchange capacity non-metallic minerals organic materials, such as bentonite, diatomite, eggshell. To ca...