Advanced Materials Research Vol. 548

Abstract: 16-channel EEG data during intermittent episodes of epilepsy is recoded and analyzed to find the lesions source for temporal lobe epilepsy by Granger causality. And the analysis of EEG with the lesions of temporal lobe epilepsy and non-lesions area of relationship between cause and effects is focused on, exploring temporal lobe epilepsy with lesions in other regions of the information transduction relationship for the clinical determination of temporal lobe epileptic focus to provide a theoretical the support. There are 8 cases patients which 6 cases patients of left-temporal lobe epilepsy and 2 cases patients of right-temporal lobe epilepsy in this work, Sampling frequency fs=200Hz，time t=20s (Sampling points N=4000). Granger causality is used to direction of the information transduction between each channel of the EEG signals. Autoregressive methods of EEG analysis for multi-channel data and determination of the coefficient of the matrix A, and proportion of operations on the matrix A is applied to get the result of matrix I which can reflect the causal relationship between each channel. The result shows that Granger causality can test the location of the lesions source and the areas that the information was reached. The results are consistent with the diagnosis of the EEG and CT. Granger causality not only can analyze the causal relationship of EEG, and it can calculate the multi-channel information transduction between the directions of EEG, which can provide support in the clinic for determine the source of seizure.

Abstract: Measurement error is traditionally represented with probability distributions. Although probabilistic representations of measurement error have been successfully employed in many analyses, such representations have been criticized for requiring more refined knowledge with respect to the existing error than that is really present. As a result, this paper proposes a general framework and process for estimating the measurement error based on evidence theory. In this research cumulative belief functions (CBFs) and cumulative plausibility functions (CPFs) are used to estimate measurement error. The estimation includes two steps:(1) modeling the parameters by means of a random set, and discrediting the random set to focal elements in finite numbers; (2)summarizing the propagation error. An example is demonstrated the estimation process.

Abstract: Base on the RFID technology and CAN technology, the paper designed a underground mine personnel tracking system.[1] With the RFID technology, the personnel with the electric tags can be positioned and identified. The information collected by the writer can be transmitted to the surface with the CAN bus line, personnel’s localization are realized. In practical applications, the system runs well, which achieved good economic and social benefits.

Abstract: The paper analyse the two wheel differential robot motion control, and the membership function of affiliation between the amount of input and output was established.Then combine the incremental PID control algorithm with fuzzy control strategy, and it was used to the two wheel differential robot motion control model. By the MATLAB for simulation, get the control system response curve and achieve a satisfactory result.

Abstract: This work is to investigate solid-liquid flows inside entire passage of a large Francis turbine unit and a modified algebraic model is proposed to take the solid-phase turbulent viscosity into consideration based on realizable turbulence model for the liquid phase and further development of the commercial CFD software. The energy conversion between the pressure and velocity, and the sedimentation distribution characteristics around all the hydraulic parts are simulated. The calculated velocity and sedimentation concentration distributions inside the runner are not uniform due to the effect of the centrifugal and Coriolis force. In addition, the calculated eccentric vortex rope in the draft tube causes vortex cavitation and vibration to the turbine unit, which leads to the eccentric sedimentation distribution. The simulation results (i.e., the mixture pressure, velocity and sedimentation distributions) are in good agreement with the natural rule, suggesting that the simulation strategies are capable to handle two-phase flows over complex geometries. The computational results can provide the useful information for hydraulic turbine designs. Future work will focus on the optimizations of hydraulic impeller designs using simulated results.

Abstract: Sulfur is an important raw chemical industry material which is widely used in a variety of industries. In recent years, several new natural gas purifying plants was built in Sichuan province, the availability of sulfur has considerably grown. New sulfur applications should be innovated to meet the sulfur consumption. The main use of sulfur is vulcanizing the rubber as an agent. With the increase of the vulcanizing temperature, however, the solubility of sulfur in the rubber will become bigger, the more amount of sulfur additive should be needed which results in the isolation of sulfur appearing on the rubber surface. The isolation will not only damage the appearance but also lower the surface adhesion of the rubber which can make the bondage process more difficult. For the purpose of decreasing the isolation, it is necessary to select vulcanizing agent with bigger relative molecular mass, the appropriate amount and control the positive vulcanizing strictly. The two main solutions for avoiding isolation are: (1) choosing the vulcanizing agent with bigger relative molecular mass, i.e. IS (insolvable sulfur) [1]; and (2) using the encapsulated sulfur [2]. For the reason of huge energy cost and toxicity in the IS production, the encapsulated sulfur preparation method is introduced. In this paper, a scale-up sulfur encapsulating process was planned and carried out after the lab trial was successfully finished. The TG/DSC analysis was made to investigate the thermal characteristics of the sulfur microcapsule.

Abstract: Ultrasonic linear motor, Piezoelectricity, Rectangular vibrator, Traveling wave Abstract. With the aim of realizing quasi-traveling wave drive in ultrasonic linear micro motors, a novel quasi-traveling wave ultrasonic linear motor using a ring type rectangular vibrator with the sizes of 39mm×6mm×12.7mm is proposed. The quasi-traveling wave is excited and propagates along the ring type rectangular vibrator depending on the superposition of two orthogonal flexural-vibration modes with a spatial phase shift of 90 degrees. 7 piezoelectric ceramic elements are used to excite two working modes of the vibrator. The vibrator structure was designed and eigenfrequency degeneration was realized by Finite Element Analysis (FEA) method. The modal test shows that the design scheme was tenable. The excitation and propagation of quasi-traveling wave were proved by laser vibration test. The trial motor gave a maximum driving velocity of 162.5mm/s and a maximum load of 8.5N, while the excitation frequency was 66 KHz and voltage was 160V_pp.

Abstract: Among facial masks, the nonwoven facial mask is most popular. So how to enhance the quality of nonwoven facial mask is important for promoting competitiveness. Therefore, the purpose of this study is to find out the optimal combination of parameters of hot wheel press. First, Taguchi methodology was used to carry out parameter design and chooses the parameters of hot wheel press that would affect the quality of nonwoven facial mask as the experimental control factors; and then selects an appropriate orthogonal array to perform the experiments. In addition, by executing with main effect analysis, it is able to decide upon the optimal combination of parameters of hot wheel press and the significant factors of the nonwoven facial mask, and then applying the confirmation test to verify the experimental reliability and reproducibility.

Abstract: Shortage of housing and the growth of increasing demand of it are often considered as the essential problem in the developing countries. The studies indicate the issue is truly correct about Iran. The factors which always cause the problem of shortage of housing that the main and important of which in Iran are: the growth of population, need for renovation of old settings, inappropriate and imperfect current building industry and destruction by natural factors such as earthquake. All of these factors result in the considerable growth of housing demand. In this condition, mass production of housing in order to acceleration of building construction is necessitated. One of the difficulties involving mass production is not using of indigenous patterns in constructing process. The goal of this research is using of indigenous patterns in mass production and industrial housing and also replying to the question of how you can use the indigenous patterns in industrial architecture. Odlajan district of Tehran has been selected as case study. The typology of the existing housing extracted. Then selective patterns for industrial construction are offered. This research involves the simulation method in hypothesis test. Data collecting is based on librarical studies and field survey with the descriptive-analysis techniques.

Abstract: This study applies PCR-DGGE fingerprinting technique to analysis the bacterial community structure of phosphorous removal and denitrification system. Through strains identification, it is found that acinetobacter sp.is the base of keeping favorable phosphorus removal effect, Spirochaeta sp.undertakes the function of organic matters removal, Bacillus sp. and Lampropedia hyalina sp.can propagate largely in the germiculture area(No.1 oxic tank), and can be preyed on by highlevel microbe(such as protozoa and metazoan) in protozoa growing area(No.2oxic tank) and metazoan growimg area(No.3 oxic tank). The predation between highlevel microbe and low grade microbe can promote efficient sludge reduction of HA-A/A-MCO process.