Applied Mechanics and Materials Vol. 575

Abstract: This paper described fabrication and comparison of embedded ultrasonic sensors for NDE applications. A 1-3 cement-based piezoelectric composite was used as the sensing element of the ultrasonic sensor. As a front matching layer between test material and piezoelectric materials, cement/epoxy resin was selected. In order to make the backing materials for sensors had enough acoustic attenuation performance, the backing material of sensors doped with tungsten powder. When the mass ratio of tungsten/cement backing was two and the thickness of cement/epoxy resin front-face matching was 3mm, the 1-3 cement-based piezoelectric ultrasonic sensor showed a significant enhancement in both relative pulse-echo sensitivity and-6dB bandwidth. These promising results suggested the great potential for developing high-performance ultrasonic sensors using the 1-3 cement-based piezoelectric composite.

Abstract: In order to improve above problems, this paper presents a new patch-based sampling algorithm for synthesizing textures from an input sample texture. We determine the size of block analyzing the effect of the best matched texture to synthesis result, and the result is satisfying. Moreover, the patch-based sampling algorithm remains effective when pixel-based non-parametric sampling algorithms fail to produce good results.

Abstract: The high way with its characteristics of high flow, fast, safe and comfortable, has played an important role in road traffic. In this paper, based on the maximum-flow algorithm, study on the traffic capacity of highway. Firstly, explain the basic theory of highway traffic capacity.Then, focusing on the method of maximum-flow algorithm to calculate the highway capacity, convert it into usable calculation mathematical model, explain the problem and cite an example.Finally,summarized the full text of the research work. The main research achievements and innovation in this paper is studying the highway network capacity from the macro level, use a quantitative study on the highway traffic capacity of the network.

Abstract: The monotonic convergence (MC) property of discrete two-dimensional (2-D) systems described by the Roesser model is studied. The MC problem of the 2-D system is firstly converted to two H_∞ disturbance attenuation problems of the traditional one-dimensional system. Then, the sufficient condition is derived for the MC, which is given by two linear matrix inequalities (LMIs). Furthermore, it can be shown that either of the LMIs can also guarantee the Bounded-Input Bounded-Output (BIBO) stability of the 2-D system. Finally, a simulation example is given to show the effectiveness of the LMIs condition.

Abstract: We propose a scheme for creating coherent atomic superposition states via the technique of stimulated Raman adiabatic passage (STIRAP) in a Λ-type system where final states are composed of manifold of levels and the intermediate levels could be more than one level. If the pump pulses and Stokes pulses are kept in the same order of ordinary STIRAP, through the control the delay time between the Stokes pulses and pump pulse, we could create arbitrary superposition states in the manifold of levels.

Abstract: This paper represents a study and analysis of designing a PSS (Power system stabilizer) to be used with SMIB (a Single Machine and Infinite Bus) system that was developed using ANN (Artificial Neural Network). Furthermore, the dynamic performance of ANN based stabilizer is established and compared with conventional types of PSS. The proposed scheme’s effectiveness was tested through simulation in order to analyse the stability features of the small signal of the system regarding the operating situation of the steady state when a transmission line is lost. The focus of the primary method was on how the control performed. This was later confirmed to possess the level of a reaching time that was shorter and a spike that was lower.

Abstract: Tidal Current Turbine will be an important device of renewable energy in the upcoming decades. Hydro energy, wind energy and solar energy will mostly utilized in Indonesia in order to fulfill the energy of remote villages and remote islands and optimizing the domestic energy availability. Regarding the small scale field research conducted in the year 2012 and 2013 in Indonesia, transmission system and low rpm alternator are encountered as a significant problems in order to develop the hydro and wind turbine engine. Both parts are not yet produced locally in Indonesia. Domestic production in step-up gear transmission system of ratio 1 : 30 to 1 : 60 and low rpm alternator will fundamentally required to gain creativity in the country.

Abstract: Multiphase flow experimental facility is an indispensable part in the construction of laboratory of oil and gas storage and transportation, and the gas-liquid mixer is an important part of the experimental facility. Because the existing gas-liquid mixer has certain limitation, the author designs a new type of gas-liquid mixer on the base of existing mixer. Finally, through calculation of CFD simulation software, the new mixer can achieve good mixing effect and satisfy the requirement of experiment.

Abstract: Modern day electric vehicles and hybrid vehicles which run completely/partially on electric power typically use lithium polymer cells to build the battery module. The high energy density of the lithium polymer cells makes them desirable compared to others. These battery modules get heated up as high currents pass through the cells, which are arranged in stacks. Thermal management of cells is one of the main factors to be considered in the battery module design. A properly designed thermal management system is crucial to prevent overheating and uneven heating across a large battery module of lithium polymer cells, which can lead to degradation, mismatch in cell capacity and thermal runaway. A Three dimensional transient thermal analysis of cell stacks is performed in ANSYS workbench under the required operating conditions and a temperature profile of each and every point is obtained. An experimental setup is designed and built to simulate both the thermal and electrical conditions of the battery module in order to determine the thermal performance of the cell stacks. The simulation results are validated with the experimentally obtained results.

Abstract: Different fuel blends containing 10, 30 and 50% almond oil with diesel fuel were prepared and the influence of these blends on emissions and some performance parameters were inspected using a diesel engine. The blends and the diesel fuel were examined under various load conditions and the results showed that almond-blended fuels have slightly different properties than diesel fuel. Measured engine performance parameters have generally showed a slight increase in exhaust gas temperature and in brake specific fuel consumption, and a slight reduction in brake thermal efficiency. Blending of almond oil with diesel fuel reduced the engine CO and increased NO_x percentages.