Advanced Materials Research Vols. 217-218

Abstract: Using the test data of suspendsion load on socker rod from oilfield database, a prediction model is presented, which adapted the improved L-M neural network algorithm and explored the 6 effect factors’ relationship: the rod stroke, frequency of strokes, rod diameter, pump diameter, submergence depth and pump setting depth. With training the model,and higher training accuracy is acquired, which shows using this method to predict the suspendsion load is effective.

Abstract: The objective of fastest completed vehicle routing problem (FCVRP) is to minimum complete time, this kind VRP problem was applied in emergency management and quick response supply chain management. Multiple ant colony algorithm for this problem is studied in this paper. The conception of FCVRP is given and then vehicle allocation method and objective function computing method are given to convert FCVRP problem to optimal alignment problem. At same time one local search method of this problem is introduced. Then learning multiple ant colony algorithm is bring forward to solve FCVRP and one numerical example is solved by this algorithm at last.

Abstract: The commercially pure(CP) titanium specimens were modified with Direct current(DC) plasma nitriding and arc ion plating of TiN film. The duplex treated titanium samples were characterized by scanning electron microscopy(SEM), microhardness tester and ball-on-disc tribotester. The results showed that the duplex treated CP titanium appeared uniform and bright golden, microhardness and wear resistance improved substantially and were superior to that of only TiN coated ones. All these results indicate plasma nitriding and TiN film deposition duplex treatment can improve surface characteristics of CP titanium significantly. The method can be applied to the titanium denture to improve the tribological properties and color.

Abstract: Performance is very important for the success of software. Software performance engineering (SPE) provides a good approach to constructing software systems that meet performance goals. We must apply SPE into whole software lifecycle. First of all, goal setting is the basic and key factor to the success of SPE. In this paper, we focus on the best practice of goal setting of SPE. The steps and some experiences on goal setting will be discussed in more detail.

Abstract: A new algebraic method for the solution of the forward displacement analysis of a parallel manipulator is presented in this paper. Based on the algebraic method, the problem of the forward displacement problem is reduced to a polynomial equation in a single unknown from a constructed matrix which is relative small in the size. From the univariate equation, all closed-form solutions of the different locations of the mechanism can be derived.

Abstract: Polyvinylamine (PVAm) was synthesized by Hofmann degradation of polyacrylamide (PAM). The thermal properties of the Polyvinylamine hydrochloride (PVAm•HCl) were studied by differential scanning calorimeter (DSC). The degradation rate (a) decreased with increasing weight-average molecular weight (Mw) of PAM and decreasing amount of NaOH, and a were the better values when the concentration of PAM was 5% and the amount of NaClO was 10 mL. DSC curves showed that the glass transition temperature (Tg) of PVAm•HCl increased with increasing Mw of PAM, concentration of NaClO and decreasing concentration of NaOH. Tg of PVAm•HCl appeared the minimum value when the concentration of PAM was 5.0%.

Abstract: A silica supported Cu catalyst with good performance for ethylene glycol (EG) production was prepared by the hydrolysis of tetramethoxysilane (TMOS) in one phase solution using methanol as co-solvent, followed by the precipitation of copper on SiO2 by ammonia evaporation. XRD, SEM and TEM were carried out to characterize the structural and morphology properties of the catalyst. The results showed that Cu particles were homogeneously dispersed on the support and thus lead to the high catalytic performance.

Abstract: The development of Micro-ElectroMechanical Systems ,integrated circuits, wireless communications have resulted in the creation of miniature, ultra-low power, and wearable health monitoring system. The system can be defined as a Body Sensor Network that can be embedded in the user’s outfit as a part of the clothing .This 3ACare system is a wearable health monitoring and alert system which can give anyone health care at anytime and anywhere. The system continuously collects multiple vital signs by physiological sensors and evaluates the signs in a personal server such as a PDA. And the personal server transfers the data to a medical server center by 3G net or Internet. The doctor in the medical server center will give the patients message after they diagnosed the data.The paper describes the architecture of 3ACare and the details of the wireless body sensor network (WBSN) nodes and the test result.

Abstract: Recycled aggregate concrete (RAC) is a kind of practical and economic material to reuse the great amount of construction and demolition wastes, which has received many discussions nowadays. In consistent with sustaining development, the recycled concrete that is made from recycled concrete aggregates could be a perfect solution to resource and environment preservation. Its thermal mechanical properties are different from other concretes as a result of different property of the aggregate of recycled concrete and other concrete. However, little research has been done under high temperatures. Therefore, on the basis of experimental research, the thermal mechanical behaviors and microstructure of recycled concrete are studied in this paper. The present paper deals with investigations on the effect of high temperature exposure on the compressive strength of recycled aggregate concrete cube specimens which are made from different proportion of recycled aggregate such as 0%、50%、100%. Experiments were conducted to study the compressive strength variations with increasing temperatures, up to 700 °C, and the subsequent cooling modes such as natural and spray cooling. Then micro-structural observations of the specimens by means of scanning electron microscopy (SEM) were obtained. Based on the analysis of experiment results, it can be proved that it is feasible to apply recycled concrete to practical engineering.

Abstract: Focuses on the range error of sonar due to specular reflection, a method of weighted fusion has been used to fuse the data of sonar and camera and make the intelligent wheelchair complete the localization accurately at the area of corner. A path planning for the wheelchair is then given. After testing experiments, results show that the method can make the wheelchair passing through a corner safely and smoothly.