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Quantum threshold algorithm is proposed to reduce the noise of signal. Quantum superposition principle is used to construct noise model in wavelet domain. We consider that signal is quasi quantum system. Every wavelet coefficient belongs to a superposition state. We don 't know whether it belongs signal or noise until we measure it. Unlike hard threshold(More)
All −1-type pointed Hopf algebras with Weyl groups of exceptional type are found. It is proved that every non −1-type pointed Hopf algebra is infinite dimensional. This article is to contribute to the classification of finite-dimensional complex pointed Hopf algebras H with Weyl groups of exceptional type. The classification of finite dimensional pointed(More)
A low noise single-ended to differential linear two-stage switched capacitor variable gain amplifier (SC-VGA) is designed in a 0.18&#x03BC;m CMOS technology for 4MHz center frequency (f<sub>c</sub>) ultrasound imaging. To simplify the clock generator and improve linearity, the voltage sampling technique is adopted to replace the charge sampling for sake of(More)
This paper presents a method for synthesizing microwave filters with source-load coupling. The equivalent circuit of the low-pass prototype of a general lossless coupled resonator filter is proposed, and the corresponding transfer function t(s) is derived. Then, two microstrip filters with source-load coupling, one symmetric and the other asymmetric, are(More)
The conformal geometry of spacelike surfaces in 4-dimensional Lorentzian space forms has been studied by the authors in a previous paper, where the so-called polar transform was introduced. Here it is shown that this transform preserves spacelike conformal isothermic surfaces. We relate this new transform with the known transforms (Darboux transform and(More)
The pitch angle controller is designed for SCIG wind power system by using sliding mode control to level the output power of wind turbine generation (WTG) at the rated power. The WTG system model is established by using small signal method. Then the pitch angle control system is designed based on the sliding mode control via reaching law. At last, the(More)
This paper presents a differential inverter-based switched-capacitor (SC) oscillator in 65 nm CMOS technology. The proposed SC oscillator is based on the continuous-time two-integrator oscillator, and the differential version is formed by the inverter-based pseudo-differential operational trans-conductance amplifier (OTA). By employing the inverter-based(More)
A compact tri-band monopole antenna with asymmetric CPW grounds for WLAN/WiMAX applications is proposed. The proposed antenna has a simple structure and compact size of 28&#x00D7;14.5 mm<sup>2</sup>. It is found that the lengths and positions of the T-shaped monopole and the asymmetric CPW grounds can be used to adjust three desired resonant frequencies,(More)