Zhejiang University of Technology is located in the city of Hangzhou, Zhejiang Province. It is considered one of the top industrial universities in mainland China and the second largest university in Zhejiang Province after the most comprehensive university - Zhejiang University.Engineering, especially chemical and biological engineering, is its strongest element. During the 1980s it made an effort to become a comprehensive technological university instead of a technological college. It keeps a close and broad relationship to industry.It is a typical technical university of the new generation in China. It followed the trend during the 1980s and 1990s of Chinese technical institutes changing from the soviet specialized style into a much more comprehensive style. Wikipedia.
Sun M.,Zhejiang University of Technology
Automatica | Year: 2012
This paper presents a partial-period adaptive repetitive control method for a class of periodically time-varying nonlinear systems. To reduce the size of memory usage, the symmetric feature of periodic parameters is explored to form partial-period adaptation mechanisms. Both Half- and quarter-period adaptation strategies are proposed, and characterized analytically. The stability of the closed-loop system with each repetitive control is established, along with tracking error convergence to zero. In addition, the saturated-adaptation is suggested for providing bounded estimation. © 2012 Elsevier Ltd. All rights reserved.
Liu H.-S.,Zhejiang University of Technology |
Lu H.,Beijing Normal University
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Year: 2014
We show that for n-dimensional Einstein gravity coupled to a scalar field with mass-squared m02=-n(n-2)/(4ℓ2), the first law of thermodynamics of (charged) AdS black holes will be modified by the boundary conditions of the scalar field at asymptotic infinity. Such scalars can arise in gauged supergravities in four and six dimensions, but not in five or seven. The result provides a guiding principle for constructing designer black holes and solitons in general dimensions, where the properties of the dual field theories depend on the boundary conditions. © 2014 The Authors.
Wang A.,Zhejiang University of Technology |
Wang A.,Baylor University
Physical Review Letters | Year: 2013
Stationary, axisymmetric, and slowly rotating vacuum spacetimes in the Hořava-Lifshitz (HL) gravity are studied, and it is shown that, for any given spherical static vacuum solution of the HL theory (of any model, including the ones with an additional U(1) symmetry), there always exists a corresponding slowly rotating, stationary, and axisymmetric vacuum solution, which reduces to the former, when the rotation is switched off. The rotation is universal and only implicitly depends on the models of the HL theory and their coupling constants through the spherical seed solution. As a result, all asymptotically flat slowly rotating vacuum solutions are asymptotically identical to the slowly rotating Kerr solution. This is in contrast to the claim of Barausse and Sotiriou, in which slowly rotating black holes were reported (incorrectly) not to exist in the infrared limit of the nonprojectable HL theory. © 2013 American Physical Society.
Gong X.,Zhejiang University of Technology
Physical Chemistry Chemical Physics | Year: 2013
The control of surface properties such as the morphology, roughness, stiffness, and wettability of polyelectrolyte multilayers was carried out using poly(diallyldimethylammonium chloride) (PDADMAC) and poly(4-styrenesulfonic acid-co-maleic acid, 1 : 1 SS : MA) sodium salt (PSSMA 1 : 1) as the building blocks via adjusting the assembly pH value. We found that the surface roughness of the multilayers increased with increasing assembly pH value, and that the morphology was quite different at various assembly pH values when PSSMA was assembled as the final layer. However, the surface roughness and morphology of the multilayers (PDADMAC as the final layer) showed no apparent change at various assembly pH values. Interestingly, the stiffness of the PSSMA/PDADMAC multilayers could be tuned. Nanoindentation measurements by SFM showed that the hardness of the multilayers was very different at various pH values when PSSMA was the outermost layer. Conversely, the hardness of the multilayers remained unchanged regardless of the pH when PDADMAC was the outermost layer. The water contact angle hysteresis (the difference between the advancing and receding contact angles) of the multilayers was largely affected by both surface roughness and surface hydrophilic groups which could also be tuned by assembly pH. © 2013 the Owner Societies.
Gong X.,Zhejiang University of Technology
RSC Advances | Year: 2014
In general, techniques of particle arrays on polyelectrolyte multilayers involve complex and inefficient steps. Here, we present a simple yet robust method for fabricating ordered two-dimensional nanoparticle arrays on polyelectrolyte multilayers via water induced flow of multilayer films. The process is easy and repeatable without the requirement of complicated surface preparation or chemical modification. By droplet evaporation of silica or other functional nanoparticle solutions on a patterned PDMS stamp, nanoparticle arrays on polyelectrolyte multilayer film surfaces will occur when the PDMS stamp contacts with polyelectrolyte multilayers. This work provides a facile and efficient approach to fabricate colloidal nanoparticle or other functional nanoparticle arrays on polyelectrolyte multilayers which are potentially useful for sensor materials, biomaterials and so on. This journal is © the Partner Organisations 2014.