Xuezeng Zhao

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Nanobubbles are produced on hydrophobic surfaces when they are immersed in aqueous solutions. The effect of nanobubbles on the immersed surface is of interest in many applications. In the study presented here, immersion of the polystyrene film in de-ionized water for several hours produces nanoindents on the film surface. The typical diameter of the(More)
Based on the principle of the wavelength division multiplex (WDM), a data processing method which can increase the number of fiber Bragg grating (FBG) sensors in series is given. In this method, genetic algorithm (GA) is used to detect the Bragg wavelength of FBG. Simulations and experiments demonstrated that the Bragg wavelength can be detected when a(More)
The scanner is the most important part of Atomic Force Microscope (AFM), which directly determines an AFMpsilas measuring capability. However, the scanner made of piezoelectric materials always exhibits significant hysteresis and nonlinearity, and the hysteresis will reduce the positioning precision of AFM and cause distortion in scanning images. In this(More)
Extraction of simple, effective and efficient decision rules for fault diagnosis is one of the most important problems in mechanical fault diagnosis because available information is often inconsistent and redundant. Using inconsistent and redundant information, an extraction method of decision rules based on the rough set theory is developed in this paper.(More)
In fluid flow on hydrophobic surfaces, boundary slip occurs at the solid-liquid interface and nanobubbles on the surfaces are believed to be the reason for it. Boundary slip is of practical importance in micro/nanofluidics to reduce the drag force in fluid flow. However, nanobubbles tend to move under external disturbance. Therefore, the decreased degree of(More)
In this article, we have studied the surface nanobubbles on polystyrene (PS)/water interfaces using tapping mode atomic force microscopy (TM-AFM). Detailed bubble coalescence phenomenon of differently sized surface nanobubbles (with lateral size up to about ∼10 μm) was obtained. The quantity of gas molecules, before and after coalescence, was calculated. It(More)
Extracting rules from incomplete data are usually more difficult than extracting rules from complete data in mechanical fault diagnosis. In order to extract simple and effective diagnostic rules from incomplete data, a method to directly extract decision rules for fault diagnosis from incomplete data based on rough set is proposed in this paper. The method(More)
Surface nanobubbles, which are nanoscopic or microscopic gaseous domains forming at the solid/liquid interface, have a strong impact on the interface by changing the two-phase contact to a three-phase contact. Therefore, they are believed to affect the boundary condition and liquid flow. However, there are still disputes in the theoretical studies as to(More)
The nanofriction between a silicon nitride probe and both a silicon wafer and an octadecyltrichlorosilane (OTS)-coated surface is studied in saline solution by using lateral force microscopy (LFM). The effects of surface charge on the nanofriction in an electrolyte as well as its velocity dependence are studied, while the surface charge at the solid-liquid(More)