Chinese Economists on Economic Reform - Collected Works of Du Runsheng

Abstract

This dissertation focuses on the investigation and evaluation of adptive algorithms for multichannel active noise control system. The aim of the research is to investigate the effectiveness of the FxLMS algorithm and the pre-trained control filter in attenuating various types of noise.The study begins with a comprehensive review of the existing literature on active noise control, highlighting the significance of noise reduction in different applications. The theoretical foundations of the FxLMS algorithm and the pretrained control filter are then presented, including their underlying principles and mathematical formulations. Through a comprehensive analysis, a clear understanding of these methods is established.To assess the performance of the FxLMS algorithm and the pre-trained control filter, extensive simulation experiments are conducted using real-world noise signals. The experiments include scenarios such as aircraft noise, traffic noise, and mixed noise. The results of the simulations are used to compare the noise reduction capabilities of the two methods and to evaluate their effectiveness under different noise conditions.The findings indicate that the FxLMS algorithm exhibits remarkable noise reduction performance. It demonstrates a strong ability to track and respond quickly to varying noise patterns. In the initial stages of noise reduction, the pre-trained control filter shows better performance. However, as time progresses, iii

Recovery of Initial Conditions of Time-Varying CML with Symbolic Dynamics

“…With the increase of n , equivalently, successive iterations of the map will provide increasingly more information of ) 0 ( x . If there is no system coupling, the initial conditions estimation for CML is the same as that for 1-D individual map based on equation (2). However, in practical applications, a large numbers of individual lattices evolved by 1-D map are usually coupled with each other to construct a CML system.…”

“…Chaotic signals, generated from chaotic system have received much attention recently and been widely used in many engineering contexts such as physiology, weather forecast, neural network, economics and information processing [1][2][3][4][5][6]. Recent studies mainly focus on the limit of forward direction of chaotic maps while the initial process of iteration is always ignored.…”

Study on the Reasons for the Relocation of Guangzhiyuan to Jinan Nanguan

“…The throughput of medicinal materials can be comparable to Anguo in Hebei, the largest medicinal material distribution center in China. " [13] Qianfo Mountain is located southeast of Guangzhiyuan, and the temple fair on March 3rd and September 9th every year is also bustling with Smoke emitted by burning incense and tourists. In Qingzhou, Timothy Li emphasized dealing with Chinese religions and folk beliefs, demonstrating his strong confidence.…”

The structure and changes of China’s land system

“…After the CPC came to power, it installed socialism based on public ownership, promoting China’s transition from a rural economy to an industrial one (Zedong, 1991). For this purpose, the new regime conducted a series of state-led system recreations in rural areas (Runsheng, 2005). As a result, a unique collective ownership system of rural land was formed, which had the following characteristics: first, as a form of public ownership in rural areas, collective ownership was applied to rural land and the state implemented comprehensive political and economic control over the rural areas through people’s communes, production brigades, and production teams.…”