Zhejiang University Press
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Investigation on the temperature distribution and strength of flat steel ribbon wound cryogenic high-pressure vessel
Zhejiang University Press - Tập 8 Số 2 - Trang 210-215 - 2007
A sensorless and simple controller for VSC based HVDC systems
Zhejiang University Press - Tập 10 - Trang 1824-1834 - 2009
Voltage source converter high-voltage direct current (VSC-HVDC) is a new power transmission technology preferable in small or medium power transmission. In this paper we discuss a new control system based on space vector modulation (SVM) without any voltage line sensors. Using direct power control (DPC) SVM and a new double synchronous reference frame phase-locked loop (DSRF-PLL) approach, the con...... hiện toàn bộ
Characteristics and origins of a typical heavy haze episode in Baotou, China: implications for the spatial distribution of industrial sources
Zhejiang University Press - - 2017
Air pollution has become the predominant environmental problem caused by rapid industrialization and urbanization in China. In this study, measurements of the concentrations of PM2.5, PM10, SO2, NO2, CO, and O3 at six monitoring stations in Baotou, China were used to investigate the characteristics of heavy haze pollution in Dec. 12–25, 2013. Source locations of PM2.5 in Baotou were identified usi...... hiện toàn bộ
Programmed cell death features in apple suspension cells under low oxygen culture
Zhejiang University Press - Tập 5 - Trang 137-143 - 2004
Suspension-cultured apple fruit cells (Malus pumila Mill. cv. Braeburn) were exposed to a low oxygen atmosphere to test whether programmed cell death (PCD) has a role in cell dysfunction and death under hypoxic conditions. Protoplasts were prepared at various times after low oxygen conditions were established, and viability tested by triple staining with fluorescein diacetate (FDA), propidium iodi...... hiện toàn bộ
A simulation study on the optimal control of buffeting displacement for the Sutong Bridge with multiple tuned mass dampers
Zhejiang University Press - Tập 15 - Trang 798-812 - 2014
The buffeting of long-span cable-supported bridges under strong winds is one of the key issues in bridge wind engineering. In order to study the effectiveness of the multiple tuned mass dampers (MTMDs) in buffeting control of long-span bridges, the Sutong Cable-stayed Bridge (SCB) with a main span of 1088 m in China is taken as an example in this paper. The spatial finite element model of the SCB ...... hiện toàn bộ
Geometric state transfer method for construction control of a large-segment steel box girder with hoisting installation
Zhejiang University Press - Tập 21 - Trang 382-391 - 2020
This paper aims to address the problem of geometric state control of large-segment steel box girders in offshore hoisting during the construction of large-span bridges. First, the geometric state control indexes of a large-segment steel box girder are determined, such as the manufacturing parameters of the top and bottom slabs, the width of the annular joint, and the support position. Second, the ...... hiện toàn bộ
Study on the electrical properties of young concrete
Zhejiang University Press - Tập 3 - Trang 174-180 - 2017
The process of hydration and solidification of young concrete has significant effect on the long term strength and durability of concrete. The electrical property of concrete provides a direct and practical method for monitoring and investigating the hydration process of young concrete. This study developed an advanced system for measurement of electrical parameters, used to study the electrical p...... hiện toàn bộ
GA and PSO culled hybrid technique for economic dispatch problem with prohibited operating zones
Zhejiang University Press - - 2007
Primary instabilities and bicriticality in fiber suspensions between rotating cylinders
Zhejiang University Press - Tập 8 - Trang 1435-1442 - 2007
The linear stability of fiber suspensions between two concentric cylinders rotating independently is studied. The modified stability equation is obtained based on the fiber orientation model and Hinch-Leal closure approximation. The primary instabilities and bicritical curves have been calculated numerically. The critical Reynolds number, wavenumber and wave speeds of fiber suspensions as function...... hiện toàn bộ
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