Advanced Materials Research Vols. 424-425

Abstract: Two-dimensional and three-dimensional calculation methods of deep excavation, and section design programs were developed to meet the needs of foundation design and calculation with the Three-dimensional finite difference software FLAC3D. Force calculation, section design and stability analysis, and force diagram generation of support structure can be done in accordance with the requirements of different specifications by the programs. A meshing method is developed for arbitrary planar domain, and the three-dimensional stratigraphic model is established. Considering the interaction between soil and structure, the force and deformation of supporting structure and ground settlement can be accurately calculated. The results can provide a useful assistance for design and can also be used as the basis for scientific analysis

Abstract: Based on the analysis of earthquake prevention and disaster prevention plan both at home and abroad, this paper has probed into the feasibility of emergency system of city disaster prevention with the public facilities of residential areas as the core. Finally the proper structure, implementation policies and relevant technical supporting conditions of emergency facilities network in residential areas are proposed depending on the general plan and structure of public resource utilization models in residential areas

Abstract: Explore the mathematic relationship between solar radiation intensity and exterior wall temperature according to empirical formula calculation, the measured data and software fitting. Propose a preliminary function between the intensity and the temperature, and analyze the research direction in the future. Attain the conclusion of using exterior wall temperature instead of the current sol-air temperature to calculate the building heat load could save more energy

Abstract: 3-dof wire-driven parallel mechanism is studied in this research. The kinematic analysis of this wire-driven parallel mechanism is given according to analytical method. The method for spline function is proposed to generate a continuous, smooth and noiseless trajectory of the wire. The simulation results, based on simulink, verify the rationality of this trajectory planning algorithm

Abstract: Underwater carrier usually contains an aircraft. The Separation of its hood is designed to clear the flight channel for the aircraft which is carried. So it requires high rapidity, reliability and safety. Based on the analysis of its design requirements and influencing factors, puts forward a separation mode of linear cumulative blasting cutting whose collocation is circumferential and radial. And establishes the dynamic equations of the hood separation to describe the property of hood separation and forecast the trajectory of separated body. Example results show the correctness of the calculation model. This work could provide theoretical support for the design of underwater carrier

Abstract: An inverse problem of eigenvalue for generalized Anti-Tridiagonal Matrices is discussed on the base of some inverse problems of Eigenvalue for Anti-Tridiagonal Matrices. The algorithm and uniqueness theorem of the solution of the problem are given, and some numerical example is provided

Abstract: In this study is the use of the generator excitation system design parameters for distributed fieldbus technology and real-time data display module record, will transfer to the field bus data processing and real-time storage of a design. Generator current and terminal voltage and other electrical parameters by the CAN bus pass, when a failure occurs, the fault current and other electrical parameters display, and store it to MRAM or FRAM memory, and also through the external communications port to be transferred to PC and other networks. System uses magnetic resistance random access memory, ferroelectric memory extends the storage capacity, so that fault recording function can be achieved; application PIT and RTC, the timing accuracy of a millisecond, improve the recording wave function

Abstract: This paper presents a current orientation of the rotor doubly-fed motor speed control system of the simple vector control method, mainly through the detection of rotor current to control the rotor voltage and rotor current phase or reversed. When the double-fed speed, if the rotor and the rotor voltage vector vector always super-synchronous operation or sub-synchronous operation, we can guarantee the rotor side of the power factor is 1, which can reduce the capacity of the rotor side converter, reducing system costs. This paper introduces the basic principles of the system and composition, and finally gives the system simulation and experimental results

Abstract: For the problem of EPC project environmental risk were affected by a number of uncertainties, this paper improved the environmental risk indicators system of project and used unascertained functions and entropy functions comprehensively , proposed environmental risk assessment methods based on unascertained – entropy theory and clarified specific steps of the method according to a general contractor project example. The empirical research shows that the method is effective and feasible and the evaluation results are reasonable

Abstract: In order to make train monitoring easier, a embedded handheld device is designed to replace the dump box of LKJ2000 in this paper. The establishment of ARM-Linux development platform, code transplantation and embedded database development technology of QT and SQLite are introduced and Data acquisition, data dump, data analysis and printing are realized in the embedded system. The wireless remote communication is performed with GPRS module. The experiment results show that data acquisition and management become convenient and real-time with the embedded database and GPRS technology