This paper studies a time-varying coefficient predictive regression model, which takes account of the endogeneity and nearly integrated and integrated state variables. A local linear approach is used to estimate the time-varying coefficients. The asymptotic distributions of these estimates are established for α-mixing time series and the uniform convergence with a rate is also investigated. Fur...

and thus being a universal hash function family is equivalent to having a probability distribution on functions from D to R that maps elements of D in a uniform pairwise independent fashion. Typically we will consider D = {0, 1} and R = {0, 1} form < n. The following construction due to Dietzfelbinger is particularly convenient: The space of keys is all strings K = (a, b) where a, b ∈ {0, 1} an...

..4bstract—A novel ultrabroad-band amplifier configuration suitable for GaAs FET’s has been developed. The developed amplifier circuit operates as a capacitor-resistor ( C–R ) coupled mnpfifier circuit in the lowfrequency range in which IS21 I for the GaAs FET’s is constant. It also operates as a lossless impedance matching circuit in the microwave frequency range in which IS21 I for the GaAs F...

We report a detailed investigation of flicker noise in novel GaN/AlGaN heterostructure field-effect transistors (GaN HFET). Low values of 1=f noise found in these devices (i.e., the Hooge parameter is on the order of 10 ) open up the possibility for applications in communication systems. We have examined the scaling of the noise spectral density with the device dimensions in order to optimize t...

In this paper, we develop a feature comparison method for the Chinese-chess object by using the features comparison based on input image and database. Features are generated by calculating the distance between the contour of the character and the centre of the chess object. In this paper, the noise filter, object extraction, normalization, feature calculation (FC) and maximum energy slop (MES) ...

the neat bitumen, an oil refining by-product, has its own inherent weakness under long-time loading at low and high temperatures. these performance limitations of neat bitumen have led researchers to modify its physical andmechanical properties. according to several studies, polymers can be used to modify the properties of bitumen. due to much lower production costs and aiming to reduce environ...

The regional research is conducted on the mechanical properties and performance of loess in slop northern Shaanxi Province, China. On precondition conforming to related technical regulations, equipment was purchased or selfdesigned machined conduct large-scale in-situ direct shear test participatory a high slope Through multiple field tests red soils four-level platform side engineering tunnel,...