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With the speeding up of urbanization process, many cities facing a series of problems such as water shortage, water environment pollution and so on. The promotion and construction of rain garden will be one of the effective ways to alleviate this problem. In addition, the establishment of the rain garden brings new green space to the city, and provide residents with recreational environment at the...
The concentrations of aero-cation and aero-anion are measured on typical urban green space in Jilin City to study the effect of ecological community structure on aero-anion concentration at urban green space. The data are analyzed with analysis of variance. The objective of this study is to investigate the influence of different urban green space on aero-anion concentration. This study will help design...
The noise always affects the accuracy result of the abrupt breakout signal, during the analysis of mould friction signal of continuous slab casting. The traditional signal de-noising method makes the signal's edges information ambiguous as reduce the noise, and which leads to signal's partly distortion. In this paper, based on wavelet threshold de-noising, proposed by Dohono, using an adaptive wavelet...
Aimed at the characteristics of strong nonlinearity, uncertainty, time-variance and, strong coupling etc for AC electric arc furnace (EAF), and the traditional PID can not achieve desired control effect. The paper proposes a PID control algorithm based on optimized BP neural network using genetic algorithm, which is applied in electrode regulator systems of electric arc furnace to design the optimized...
A RBF neural network considering the critic mechanism is introduced to predict the system marginal price (SMP). The system consists of three elements, which are a predictor, an evaluator and a learning machine. The predictor is used to forecast the future SMP. The estimator is used to evaluate the prediction's validity. The explorer is used to determine the predictive step length. And the learning...
Radio Frequency Identification (RFID) has many perfect features such as completely non-contact, high recognition rate, bulk-storage memory, securely access and easily be integrated with existing management information system, etc. It has widely been applied in many fields especially in logistics and product quality tracking systems. The research on the application of RFID in agricultural seed quality...
UHF RFID is becoming the main stream of passive RFID applications. Reader is a key component of a RFID application system. Based on the ARM9 chip S3C2440, the UHF reader ASIC AS3990 and a battery charger 9-channel programmable DC-DC power management chip SMB122, a low-power handheld UHF RFID reader is designed and implemented in this paper. In addition to long enough read range, the power consumption...
In this paper, a strategy for self-organizing fuzzy power system stabilizer (PSS) is formulated and evaluated. Unlike other methods that have a learning algorithm to update look-up table, the proposed PSS consists of output look-up table that is made by fuzzy rule base, and learning algorithm based on the principle of sliding mode. The results of this proposed PSS reduces computation time, steady...
A fuzzy-neuro controller has been designed to stabilize the frequency and voltage output of a synchronous generator. The structure of the proposed control system consists of two PI -like fuzzy controllers and two neural networks. With this control scheme, difficulty for tuning scale factors of the fuzzy controller is reduced. Simulation results show that the system is robust to drastic changes on...
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