Stationarity and Ergodicity for an Affine Two-Factor Model

We study the existence of a unique stationary distribution and ergodicity for a two-dimensional affine process. Its first coordinate process is supposed to be a so-called α-root process with α ∈ (1, 2]. We prove the existence of a unique stationary distribution for the affine process in the α ∈ (1, 2] case; furthermore, we show ergodicity in the α = 2 case.

Stationarity and Ergodicity for an Affine Two-Factor Model

We study the existence of a unique stationary distribution and ergodicity for a two-dimensional affine process. Its first coordinate process is supposed to be a so-called α-root process with α ∈ (1, 2]. We prove the existence of a unique stationary distribution for the affine process in the α ∈ (1, 2] case; furthermore, we show ergodicity in the α = 2 case.

Study on SVG Simulation with the Voltage and Current Dual Closed-Loop PWM Control Strategy

This paper first introduced the SVG main circuit and the basic principles of SVG, then finished SVG modeling in dq coordinate process. Then an SVG direct current control method was proposed as well. Considering stability requirement to the DC side voltage, the paper designed voltage and current dual closed-loop PWM control system. Finally, SVG system was simulated using the Matlab/simulink. Results show that SVG has a good dynamic performance, verifying the correctness and validity of the dual closed-loop control.

Research on the Converse Design of Aluminum Alloy Connecting-Rod Slab Based on Casting-Forging Coordinates Process

It is very important that the shape and size of the slab is designed for forging quality in casting-forging coordinate process. The converse design of aluminum alloy connecting-rod slab is investigated. First, the initial structure of the connecting rod slab is designed, then its forging process is simulated by the software DEFORM, modifying and optimizing the initial structure according to the problems in the analysis, and the slab's casting process is simulated. The converse design reduces the blindness in the slab design process, shorts the designed cycle, and ensures the consistency between slab and the final forging better.