Advanced Materials Research Vols. 424-425

Abstract: Based on the simulation Computational Fluid Dynamics method, in view of air conditioning with wet thermal recovery plant for heat and mass transfer characteristic, establishes air channels in three-dimensional laminar flow and heat transfer, mass transfer coupling process of mathematical physics model, discusses the air conditioning with wet thermal recovery plant air channels in temperature, concentration and pressure parameters such as distribution, application enthalpy efficiency analysis method to the heat transfer performance is evaluated. The results indicate that structure parameters of wet thermal recovery plant used by air conditioning play important influence for the heat transfer performance and flow resistance performance. The research conclusion provides guidance for air conditioning with wet thermal recovery plant of optimization.

Abstract: This paper considers the flying height control problem for data storage devices using a switched controller. First, a set of switched -parameterized stabilizing controllers is constructed. Then a sufficient regulation condition for the switched system is obtained, and a regulator synthesis method is derived based on solving a set of properly formulated linear matrix inequalities. Finally, the proposed regulator design method is evaluated on an experimental setup motivated by the flying height regulation problem in data storage devices

Abstract: A new DNA computing model to realize binary integer additions based on molecular beacon is described in this paper. The binary 0 and 1 are represented by two different fluorescent states of a molecular beacon since its two different structures. By designing sequences of molecular beacons skillfully, and using the relationship between each two corresponding bits and their result and carry bit of two operational numbers, the computing process to compute each two corresponding bits of the binary numbers is simulated in the test tube. Finally, the results can be read only by detecting whether the fluorescence in tube emits. The result of the experiment shows that the algorithm is simple and convenient, and the algorithm provides a new idea for DNA computing to realize arithmetic operations

Abstract: In this paper, the new developed PPP-BOTDA based distributed optical fiber strain sensors are used to monitor wall thinning in pipeline. Furthermore, according to the sensing behavior of PPP-BOTDA, a damage detection method is proposed, by using the measured strain distribution of PPP-BOTDA, the thinning area in pipeline wall can be located and quantified by proposed method, furthermore, the accuracy of proposed method is evaluated.

Abstract: This article discusses the Image Transmission Board which based on Virtex-5 FPGA, it achieved PC transmission data through PCIE Bus. This system refers to the example of DMA transmission which provided by XILINX company, it use DDR2 memory to cache data. This board could provide Windows system use WDM driver to interact with hardware resources. The data transmission rate of FPGA is 1.5Gbit/s

Abstract: The validity of mathematical model direct impact the research result of the boiler-turbine coordinated control system. In this paper, applying the mechanical modeling method to set up model of boiler-turbine coordinated control system, and obtain its parameter by parameter identification. The mathematical model of boiler-turbine coordinated system has been modified and supplied by bilinear fit. And, for the practical problems that need to be resolved in research work of the coordination controlled object’s mathematical model, the mathematical analysis was carried out by the regenerator system integrated into heat balance of generator unit and a new type of simulation mathematical model of coordinated control system with regenerator system was researched. The mathematical model was verified through the simulation test. Based on the thought that dynamic energy and static energy separation, the of intelligent controller is structured and applied in coordination control system of generator unit. Simulation results show that not only load response and anti-interference ability are improved, but also dynamic overshoot greatly reduces

Abstract: With the anti-shear parameters reduction, the nonlinear strength reduction FEM model of slope turns to unstable status and the numerical non-convergence occurs simultaneously. Hence, the safety stability factor obtained based on c-φ reduction algorithm can be regarded as equal to stability factor obtained using limit equilibrium method. In this paper, stability analysis of one reservoir slope is made and the calculation results show that the strength reduction method matches the traditional grid limit equilibrium method well, yet with much more available information. Efficient and accurate, the strength reduction FEM is feasible to examine slope stability and analyze slope movement patterns.

Abstract: This paper uses solidworks software to build 3-D model of a certain tracked vehicle engine compartment test-bed support, then analyzed the model strain state and mode under typical operation condition by ANSYS. It is calculated that the support can meet the design demand.

Abstract: Using crack to evaluate the bearing capacity of RC Beam Bridge is an effective method. This paper puts forward using the crack spacing, width, height and their statistical weights to characterize the structural crack index and using Analytical Hierarchy Process to get crack index expression. After a lot of survey analysis of actual cracks, get corresponding relation between crack index and the checking coefficient of their bearing capacity, then through structure resistance expression to check structure, finally the assessment of the bearing capacity of the bridge was got. With a simply supported T beam bridge as an example, the result shows that this method is reliable, simple and economical.

Abstract: A zero-voltage-switching (ZVS) Zeta converter is proposed in this paper. Two separate inductors in the conventional Zeta converter are magnetically coupled in the proposed converter. The output diode is replaced with an active switch. Also, an auxiliary inductor is utilized. The ZVS operation of both main and auxiliary switches is achieved and the switching loss is significantly reduced. Moreover, the ripple component of the output inductor current is effectively removed and the output filter stage can be simplified. To verify the feasibility and performance of the proposed converter, an experimental prototype was built and tested.