Change of Bandgap Energy in Quantum System of Nanolayer on Silicon

In the quantum system of nanolayer (NL) on silicon, the bandgap energy obviously increases with the decrease of NL thickness, where the quantum confinement (QC) effect plays the main role as the thickness of Si NL changes along with (100), (110) and (111) directions, respectively. And the simulation result demonstrated that the direct bandgap can be obtained as the NL with (001) direction is thinner than 10 nm on Si surface. However, it is discovered in the simulated calculation that the QC effect disappears as the NL thickness arrives at the size of the monoatomic layer, in which its bandgap sharply decreases, where the abrupt change effect in bandgap energy occurs near-ideal 2D-layer. In the experiment, we fabricated the Si NL structure by using electron beam irradiation and laser deposition methods, in which a novel way was used to control the NL thickness by modulating irradiation time of the electron beam. The new effect should have a good application on a photonic-electronic chip of silicon.

Abrupt Change of Bandgap Energy in Quantum System of Nanolayer on Silicon Surface

In the quantum system of nanolayer (NL) on silicon, the bandgap energy obviously increases with decreasing thickness of NL, in which the quantum confinement (QC) effect plays a main role. In simulating calculation, the QC effect has been exhibited as the thickness of Si NL changes along with (100), (110) and (111) direction respectively. And the simulation result demonstrated that the direct bandgap can be obtained as the NL with (001) direction is thinner than 10nm on Si surface. However, it is discovered in the simulated calculation that the QC effect disappears as the NL thickness arrives at size of monoatomic layer, in which its bandgap sharply deceases, where the abrupt change effect in bandgap energy occurs near idea 2D-layer. In experiment, we fabricated the Si NL structure by using electron beam irradiation and pulsed laser deposition methods, in which a novel way was used to control the NL thickness by modulating irradiation time of electron beam. The new effect should have a good application on optic-electronic chip of silicon.

3D Simulation Analysis of Sedimentation of Superhigh Fill

The sedimentation deformation of superhigh fill in the mountainous areas is very complicated in law, and will be influenced the topographic relief, and it is specially outstanding for the sedimentation of high-fill project. For the significant project such as airport and road base, in order to guarantee the safe operation of the project during use, it is required to strictly control the post-construction and uneven sedimentation. Therefore, the stability of superhigh fill has become the key to influence the safety and stable operation of projects. In this paper, a simulated calculation is conducted to the ultrahigh fill of expansion project of an airport in Chongqing to analyze its stability, so as to provide references for the project design and construction.

The Simulated Calculation of Electric Impedance Sensor

In this paper, the electric impendence sensor is simulated calculation with COMSOL Multiphysics. The relationship between impedance and x-displacement of air cavity, the relationship between impedance and y-displacement of air cavity, and the relationships between impedance and radius of air cavity are obtained.

Analysis of Heat Transfer Process and the Finite Element Model of the 10kV Three-Core Pipe Cables

This paper first describes a variety of heat transfer which exists in cable’s discharge pipe laying process, and analyzes the entire heat transfer process of 10kV three core cable in a two-dimensional interface qualitatively according to the heat transfer ways. Meanwhile, a finite element model of 10kV three-core cable’s discharged pipe-laying is established, and its temperature field equations and boundary condition equations has been discussed. Finally, we get the heat transfer process of the three core cable’s pipe-laying discharged and a finite element model which can be applied to simulated calculation.

Dynamic Simulation of Heating Situation of Spraying Powder

According to the peculiarities of repairing of coke oven the spraying coating of normal temperature was used. The energy of the coke oven was used by the spraying powder to adhere to the wall of coke oven. The heating time equation of spraying powder has been deduced from thermal radiation equation, and the computer simulated calculation of heating time which is programmed is based on this equation. The possibility of spraying coating reacting in short time and adhering to the coke oven is speculated. The result of adhering of the spraying powder was proved.

Analysis of Growing Plants in Double Glass Curtain Walls

Technology of reclaiming condensed water from the thermal channel of double-pane glass curtain wall and applying the reclaimed water in micro-irrigation of natural plants was explored. Selection of plant species for the internal space of double glass curtain wall was studied to meet the ecological technological requirements of double glass curtain wall. Progressive experiment of new technology and simulated calculation of indexes were applied to obtain solar radiation consumption and finally improve indoor and outdoor thermal environment. The results showed that new technologies of applying plants in double glass curtain walls help realize ecological utilization of double glass curtain walls, further reduce energy consumption of buildings.