Recently, Ag2Te was experimentally confirmed to be a 3D topological insulator (TI) at ambient pressure. However, the high-pressure behaviors and properties of Ag2Te were rarely reported. Here, a pressure-induced electronic topological transition (ETT) is firstly found in Ag2Te at 1.8 GPa. Before ETT, the positive pressure coefficient of bulk band-gap, which is firstly found in TIs family, is fo...

A fourfold-azimuthal dependence of terahertz radiation from polished mono-crystalline (100) silicon is observed firstly. This phenomenon is explained by the electric quadrupole-magnetic dipole, which resemble second harmonic generation from (100) silicon.

In this paper, two quadratic observability normal forms dependent on output respectively correspondent to drift dominant term and forced dominant term are firstly discussed. Moreover characteristic numbers are studied in order to simplify the calculation of these two normal forms.

In this paper, the structural properties of 1-trees are discussed in details firstly. Based on the properties of 1-trees, the incidence chromatic number of 2-connected 1-trees can be determined.

The synthesis of propylene oxide from propylene glycol, a derivative of bio-glycerol, was firstly realized in the presence of alkali-loaded silica catalysts to achieve 44% conversion and 70% selectivity.

Charcot name became very famous around the world, firstly because of the work of Professor Jean-Martin Charcot, the founder of Clinical Neurology, and, secondly, because of his son, Jean-Baptiste, the world famous maritime explorer.

This paper gives an explanation of fitness landscapes in continuous space by using drift analysis. Firstly we first describe the characteristics of easy and hard landscapes, and then verify these characteristics by case study.

The development phases of e-business is described firstly, then the new product development process in cooperative product business is presented in detail, the cooperative product business support platform including technical platform and information platform is discussed finally.

Regenerable hydrogen storage of lithium amidoborane is firstly achieved through the routes of direct thermal dehydrogenation and subsequent chemical hydrogenation of its dehydrogenated products by treatment with hydrazine in liquid ammonia.

Many mathematical structures have been used to model Secret Sharing Schemes. This paper firstly presents a secret sharing schemes based on starter-adder sets of generalized Kirkman squares. Finally, we prove that the scheme is perfect.