Advanced Materials Research Vol. 499

Abstract: A novel sensing element for direct detection of L-Tryptophan (L-Trp) in human serum was proposed by combination of electrochemical transduction and molecular imprinting technique. The sensing element was prepared by electropolymerization of o-phenylenediamine (o-PD) on the gold electrode in the presence of template L-Trp. The electrochemical property of the sensor was characterized by differential pulse voltammetry (DPV). The linear response range of the sensor for L-Trp concentration was 1×10^-8 mol/L~21×10^-8 mol/L with a detection limit of 0.3×10^-8 mol/L. The results show that this approach has the potential to generate a universal inexpensive assay methodology of high sensitivity, specificity and simplicity to detect L-Trp.

Abstract: For Gantry CNC Machining Center single suspension system, adopting a control strategy that combines speed position control and fuzzy adaptive control. By designing fuzzy adaptive controller to adjust the scale factors of speed and position controller in time, ensure the robustness of a single suspension system. For the double suspension system, adopt cross-coupled synchronous control strategy. By designing cross-coupled synchronous controller between the two systems, overcome suspension height deviation of the double suspension systems, restrain tilt, to achieve the synchronization suspension purpose. Simulation results show that this control scheme guarantee the system synchronization suspension and its stability. While it has strong robust, synchronization error of dynamic process is small. It can meet the requirements of high precision.

Abstract: The paper explores a new method of the heating measurement and charging in the central heating system. The method is different from mechanical heat metering and ultrasonic heat metering existing now. However, by measuring the indoor temperature and recording the temperature periodically during the heating period, and upload the data which are measured and stored in the terminal periodically to the Internet serve by GPRS. It can adjust the charging according to the actual indoor temperature which is transmitted by the terminal. Finally not only can the system meet the requirements of the users in the heating period, but also achieve the building energy efficiency. Adhere to people-oriented principle. Make the service of heating become more and more humanized.

Abstract: A data recording and analyzing system for urban rail vehicle is proposed and developed in this paper. This system can record the vehicle running information with the help of the installed data recording equipments, and offline analyze the recorded vehicle running data and the fault data. By using the proposed recording and analyzing system, the vehicle maintainers can quickly investigate the vehicle running status, so as to diagnose the fault working condition and make the reasonable measures; The vehicle debugging person can easily find out the debug problems and the direction of improvement; The vehicle administrator can effectively obtain the vehicle’s overall operating status so as to make the appropriate management strategies. The developed system has already been used in some urban rail lines successfully, and has achieved good results.

Abstract: This paper studied the estrogenicity of six typical aqueous EDCs by examining their proliferation of MCF-7. These six EDCs were 17-β Estradio (E2), biphenol A (BPA), nonyl phenol (NP), di-n-butyl phthalate (DBP), hexachlorobenzene (HCB) and Cadmium (Cd). Results showed that MCF-7 proliferation was sensitive to these compounds. E2 was the most sensitive one and the effective concentration was 10^-14 mol/L, while Cd was the least sensitive one and the effective concentration was 10^-8 mol/L. The sensitivity of these six EDCs ranked as: E2 > BPA ≥ NP > DBP ≥ HCB > Cd. On the other hand, the cell proliferation extent of these compounds ranked as: HCB > DBP > BPA > Cd > NP ≥ E2. Very complex dose-time-response curves were observed for all six EDCs, indicating that many factors impacted the cell grow.

Abstract: Remote Elevator Monitoring (REM) is an important means to ensure elevator secure, reliable working. In this paper, an elevator remote monitoring control scheme is proposed based on multi-threaded technology. Due to all threads in the multi-threaded technology may visit the same overall situation object and the shared resource, center system communicates with embedded terminal is achieved by the method. The remote elevator monitoring system has been designed based on the multi-threaded technology; the main thread interface function is realized by monitor center software, other management operations are also executed in the system. The test results show that the multi-threaded technology applies to the monitoring system, which enhances the system efficiency and security.

Abstract: In this paper, we present an algorithm about distance calculation based on RSSI of RF. To calculate value of RSSI according to the classic model of signal attenuation, Radio propagation path loss model and formula of received signal strength, establish the relationship chart between the distance and RSSI value. And through the wireless module CC2430 of ETC system for real-time data collection. Compared with the theoretical data and the measured data. Do the correction through calibration model. Resulting more perfect algorithm about distance calculation.

Abstract: As a control method, PID control is the most widely used in industrial processes. However, PID controller parameter tuning of the pros and cons of PID controller performance has been an important factor. Fuzzy control technology is an advanced intelligent control technology, because of its advanced features and easy implementation, it can develop rapidly. This paper describes the theory and method of fuzzy control to realize the dynamic PID controller parameters tuning approach to the PID controller to achieve the best control performance.

Abstract: Aluminum electrolytic process is a complex nonlinear, time-varying delay and large industrial process system which conventional control methods are hardly can achieve good results. Because of that, a control method that combines fuzzy and neural network is put forward in the paper. This method has not only the robust fuzzy control and overshoot, but also self-learning ability of neural network. And conduct a system simulation, simulation results show that compared with the previous control method this method has good speed and stability, to achieve the purpose of energy saving for the control of alumina concentration.

Abstract: The paper introduces a new method, integral summation algorithm, to measure superfine scale based on Fraunhofer Diffraction. Be different from the traditional method, the paper simulates a series of curve of diffraction luminance distribution on different given size based on Fraunhofer Diffraction theory and researches the closest one to the diffraction curve of unknown slot measured. In order to get more accurate measurement result, the curve is taken by the integral summation algorithm and be compared on the integration area difference instead of comparing the standard deviation. The result shows that the size of given slot is closer to the size of unknown slot than standard deviation method, which somewhat improves the accuracy of the measurement.