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The concrete of harbor wharf is in the environment of multifactor erosion. Under the coupled effects of dry–wet cycles and nitrate erosion, the durability of marine concrete gradually decreases. Therefore, it is an important issue to improve the durability of concrete. The changes of concrete durability are investigated under the coupled effects of dry–wet cycles and nitrate erosion, and the concrete...
Vehicle-mounted X-band dual-polarization radar, located at coastal region (118.9 E, 25.1 N) in Fujian province, almost completely captured the entire life span of a local severe thunderstorm on August 28, 2009. Combine the radar strong echo volume and hydrometers retrieved by hydrometer identification (HID) algorithm, the characteristics of cloud-to-ground (CG) flash in different stage of thunderstorm...
Multilayer feedforward networks are related to functional groups of neurons where information is transmitted from one group to the next. It is a generic framework to characterize the properties of spiking activities in propagation. In this paper, we designed a novelty structure of feedforward network on FPGA to propagate the synchronous spiking activities. The experiment results demonstrate that the...
Strength properties (including flexural, compressive and splitting tensile strengths) of pavement concrete containing nano-particles are experimentally studied and compared with that of plain pavement concrete. Both nano-SiO2 and nano-TiO2 are respectively used to be as the additives. The test results show that the flexural, compressive and splitting tensile strengths of pavement concrete containing...
Brushless DC motors (BLDCM) are reliable, easy control, and inexpensive. But, the brushless DC motor is a multi-variable and nonlinear system. Conventional PID controllers suffer from uncertain parameters and the nonlinear of the BLDCM. This paper presents an novel approach of immune feedback PID control for BLDCM based on fuzzy set. The method is inspired by biological immune feedback mechanism functioned...
The brushless DC motors (BLDCM) are a multi-variable and non-linear system, so the research about the high performance of BLDCM is important, especially the control methods based on neural network. To solve the deficiency of neural network such as decision of structure and adjustment of parameters in hidden-unit, this paper presents an adaptive speed control approach based on genetic algorithm tuning...
The brushless DC motor (BLDCM) is a multi-variable and non-linear system, so it is difficult to get a satisfying result for BLDCM using the conventional linear control method. This paper presents an approach of single neuron PID adaptive control for BLDCM based on wavelet neural network on-line identification. The method uses single neuron PID to construct the adaptive controller of BLDCM. In addition,...
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