Advanced Materials Research Vols. 468-471

Abstract: Cotton fabric was polished with cellulase in this paper. The effect of enzyme dosage, pH processing temperature and time on reducing sugar and weight loss were investigated. Enzymatic treatment was found to increase surface smoothness of cotton fabric because most surface fuzzes were removed. The optimum condition of bio-polishing process was as follows: enzyme dosage 3% owf, pH 4.5, processing temperature 50°C, time 60 minutes, liquor ratio 1:20.

Abstract: This paper presents a generalized formulation for determining the optimal quantity of the materials used to produce Non-Slump Concrete with minimum possible cost. The proposed problem is formulated as a nonlinear constrained optimization problem. The proposed problem considers cost of the individual constituent material costs as well as the compressive strength and other requirement. The optimization formulation is employed to minimize the cost function of the system while constraining it to meet the compressive strength and workability requirement. The results demonstrate the efficiency of the proposed approach to reduce the cost as well as to satisfy the above requirement.

Abstract: With the increasing expansion and complexity of the power system structure, the operational reliability of the power grid dispatching automation system has become increasingly demanding. The data’s rapid growth and requirements of high availability and security stimulate the development of the disaster recovery technology which has become a key factor of IT infrastructure. This article describes the disaster recovery technology in details from the measure index and level classification of disaster recovery, and analyzes its implementation process and importance by taking the disaster recovery in the power grid dispatching automation system as an example.

Abstract: Due to the rapid development of Internet of Things (IoT), kinds of sensor nodes have been introduced to the different applications. Because of the variety of MCUs, sensors and radio modules, it’s challenging to reuse the device drivers between different sensor node platforms. To address this issue, a reusable device driver framework is proposed in this paper. Comparing with existed work, our framework is flexible, efficient, and easy to learn. The flexibility is achieved by layered encapsulation, which decouples the device driver with the sensor node operating system kernel. Our framework gives the reusability at the source code level, so it’s efficient. At the end, our framework is implemented in C programming language, which is the most common tool adopted by embedded system developing. This framework has applied to SenSpire OS, a micro-kernel real-time operating system for IoT sensor nodes.

Abstract: In this paper, an acceleration compensating control approach is used for dealing with the non-linear dynamics of a multiple degrees of freedom electromagnetic suspension system. This method not only has simple configuration and is implement easily, but also improves the performance of the dynamic stability and the anti-jamming capability. Simulations on the magnetic suspension demonstrated the efficiency of proposed method.

Abstract: Use special-shaped stone turn-milling machining center (HTM50200) to achieve the production of complex relief. Through the ArtCAM establish the three dimensional relief model of Riverside Scene at Qingming Festival. Analysis of blank material characteristics and features of NC machining center, select the appropriate tool, calculate cutting depth 、cutting speed 、feed rate 、spindle speed and other process parameters by formulas. With ArtCAM/CAM module to make process of the preparation of the rough finishing, the semi-finishing and finishing, and then generate the tool path file. Simulation in VERICUT can optimize the potential collision, over-cutting and owe cut of the machining process, and the adoption of special-shaped stone machining center for milling to finalize production of the relief, summarize the experience in special-shaped stone processing.

Abstract: Wheel tread scratches on the vehicle itself and the harm of the line is more and more big, the threat of on the traffic safety are getting more and more serious. The train is due to the brake wheel tread is an important cause of bruises, staff operation methods and braking equipment work braking good or not will affect the wheel tread scratches. By improving the working staff of braking operation to brake technology and strict inspection, repair, eliminate brake failure, and prevent and reduce wheel tread scratches, ensure the safety of passenger.

Abstract: Thermal stratification effects have been a great concern in a pressurizer surge line of pressurized water reactor (PWR) since 1988. These effects may damage the structural integrity and contribute in reducing the operational life time of pressurizer surge line. Several nuclear power plants operators have so far reported such mechanical damages. To realistically assess the structural integrity of pressurizer surge line subjected to thermal stratification, it is necessary to analyze the transient temperature distribution. Several researchers and scholars have carried out considerable efforts to determine the temperature distributions in the pressurizer surge line. In this study, an effort has been made to simulate the behavior of thermally stratified flow and predict the transient temperature distributions in the pressurizer surge line realistically. To obtain realistic results for such complex geometry of pressurizer surge line 3D analysis is performed using CFX commercially available CFD software. The transient temperature distributions obtained are presented and discussed.

Abstract: In recent years, flexible remanufacture has become new research focus because of the requirement of rapid repair and reuse worn parts. 3D modeling of the worn parts is the precondition of flexible remanufacturing system. According to the random position and the various forms of worn parts, 3D detection and reconstruction are necessary. First, this paper establishes a 3D detection and reconstruction system based on linear laser. The mathematic model, work principle and composition of this system are introduced, and then, according to the analysis of this system, a two steps rapid calibration algorithm is proposed. When the system parameters are calibrated, it is able to acquire 3D information on surface of worn parts in the form of scattered point data clouds. Finally, take a coupler kunckles as the worn part, 3D detection and reconstruction verifying experiment is carried out.

Abstract: Samples of regular gamma and nano-structured alumina were prepared and their porosimetric properties evaluated by N2 porosimetry method. Moreover, cobalt based catalysts for Fischer-Tropsch (FT) Synthesis were prepared by loading cobalt under two calcinations using these alumina supports. Then the porosimetric properties of these materials as well as; their reactor behaviors assessed. Although the nano-structured favored the gamma alumina from pore volume and surface points of view, comparison of porosimetric properties of fresh alumina samples with corresponding catalysts prepared revealed that calcination effect in decreasing those factors was more pronounced for the nano-structured compared to gamma alumina. Also adsorption/desorption isotherms revealed that both materials were mesoporous. Catalytic activity assessment of both catalysts made by these supports showed that nano-structured alumina was more appropriate from activity and liquid hydrocarbon production points of view.