With the continuous advancement of China's transportation infrastructure, number and proportion highway tunnels in expressway construction are increasing year by year. In order to accurately evaluate quality safety tunnel engineering, finite element analysis is used secondary lining structure, slotting method analyze working stress load on structure inversely analyzed combined with three-dimens...

In the direct drive motion system, there are obvious feedback harmonics caused by various disturbances, which have important influence on thrust characteristics of permanent magnet synchronous linear motor (PMSLM). This paper presents detent force for system. Firstly, Maxwell's equation and Schwarz–Christoffel (SC) mapping-based method used to accurately establish magnetic field model in air-ga...

<p><span>Hybrid medium access control (MAC) scheme is one of the prominent mechanisms to offer energy efficiency in wireless sensor network where potential features for both contention-based and schedule-based approaches are mechanized. However, review existing hybrid MAC shows many loopholes mainly it observed that there too much inclusion time-slotting or else an sophisticated mec...

High-performance electric drive applications necessitate a high fidelity model to predict the terminal characteristics of machines in design stage fulfill system-level evaluation together with converters. This article interprets winding function theory (WFT) from field perspective and incorporates secondary effects, such as slotting iron nonlinearity into it accurately main flux linkage inducti...

In order to study the flutter of long-span pedestrian suspension bridge and its aerodynamic control, a 420m-span is used as an engineering example, wind-induced vibration seven particular sections studied by wind tunnel tests, soft phenomenon two kinds identified. The results show that fairing wind-retaining plate measures are not necessarily effective improve stability bridge, these may reduce...

The anti-seepage wall has been widely used in many fields, and the construction technology is also various, such as high-pressure jet impervious wall, continuous grooving of hydraulic slotting machine, mechanical grab wall. Different technologies are applicable to different geological conditions, it often necessary combine or even innovate order continuously improve technical level complete tas...