Advanced Materials Research Vols. 433-440

Abstract: The reservoir water content index calculation is an important task of geological logging. This paper overcomes the existing error at calculating the water content index with traditional method, implements a set of water content index calculation software with C# programming. It enables data import, create evaluation chart board for water content automatically, data storage and other functions, and after users manually draw partition lines, the software can accurately calculate the water content index of the given points and new points, and also can predict the properties for new reservoir points according to the calculated water content index. This software implements detailed evaluate information of reservoir water content, saves a lot of human resources and achieves office automation.

Abstract: PSO has been widely used in continuous optimization problems, but in discrete domain the research and application is very little. By redefining the position and speed of particles and related operations, the discrete particle swarm algorithm can be constructed. Due to the weak capacity of local search of PSO and be easy to constringe the local optimum, it is combined with simulated annealing and the hybrid discrete PSO is constructed using the characteristics that simulated annealing can accept some ungraded solution under the control of certain probability,finally the algorithm is applied to solving the traveling salesman problem successfully. The simulation results show that the hybrid discrete PSO can get better optimization effect, which validates the effectiveness of the method.

Abstract: The path loss exponent shows the effect of space environment on the RF signals in wireless communication model. In most RSSI based location method the path loss exponent is assigned a fixed empirical value which can not reflect the actual environmental impact of the wireless signal, which lead to low position accuracy and considerable positioning error. Aiming at some complex and rapidly changing environment a path loss exponent dynamic acquired algorithm is proposed, which can calculate the actual path loss exponent with the distance and the RSSI value information between adjacent beacon nodes. On basis of the path loss exponent dynamic acquired algorithm a path loss exponent dynamic acquired based localization algorithm is proposed which can estimate the blind node position with the actual path loss exponent, and can improve the adaptability to the environment of the RSSI location algorithm. The simulation shows that the positioning accuracy of proposed method is significantly improved and the effect of proposed method is more precise than the common RSSI method under the same environment.

Abstract: A new structure of microwave field effect transistor Dielectric Resonator Oscillator (DRO) working at 8.5GHz is presented with negative resistance theory and harmonic balance theory. In order to magnify the output power and enhance the load pulling, a Buffer Amplifier (BA) is designed after the DRO. The nonlinearity and linearity of this structure are analyzed and optimized with commercial software ADS. Then the properties of this structure are simulated with commercial software HFSS. Simulation results show that DRO co-integrated with BA a high output power of 13.426dBm, at an oscillation frequency of 8.5GHz.

Abstract: CTI is a new technology combines communication technology with Internet. The Telephone Voice System is typical application of CTI. This paper presents the design and realization of a Telephone Voice System, utilizing D081A voice boards of DongJin Company. System structure, module di-vision and realization procedures are demonstrated. The system code is compiled with VC++, and database adopts SQLite. The system realizes recording, playback and other basic functions, and network calls function is extended. Users can operate the system with telephone, which is simple and convenient.

Abstract: A digital regulator architecture implemented in FPGA is described which is used in the accelerator power supply. To save the delay time, the device is based on combinational circuit and special data format. The multiplier uses the partial products generated by modified Booth algorithm, Carry look-ahead adder and Wallace tree. The regulator is written in Verilog, and is synthesized into FPGA. The synthesis results shows that the proposed regulator can run 200MHZ clock rate in FPGA EP3C25F256 and the whole feedback time is as short as 3 clock periods.

Abstract: USB movable storage devices have been bringing significant convenience for data interchange among computers while chances of invalid copy and sensitive data leakage are exposed. In order to decrease the leakage possibility of confidential information, unilateral control takes effect in USB device. This paper introduces how to realize the unilateral control of USB device and elaborates the key technique thereof.

Abstract: A new detection method of weak signal mixed in strong noise is proposed. The method includes theory scheme, hardware and software. It detects and processes signal by using the instrument magnifying technology and single-chip microcomputer control. By means of virtual instrumentation simulation and display, this design provides effective methods to detect µA-level weak signal in piezoelectric infrared detector. Through the experiment of simulate low frequency weak signal detection, the system fully reveals its practicality and superiority in the field of lower S/N signal detection.

Abstract: Due to the project in this article, a kind of image capture and processing system based on FPGA is proposed, the low cost high performance FPGA is selected as the main core, the design of the whole system including software and hardware are implemented. The system achieves to functions of the high -speed data collection, the high -speed video data compression the real time video data Network Transmission and the real time compression picture data storage. the data processed was transferred to PC through USB2.0 real-time to reconstruct defects microscopic images. Experimental results prove right and feasible by adopting the algorithm and scheme proposed in this paper.

Abstract: To realize filtering of high-speed input data, and aiming at the design method of systolic FIR digital filter, this paper proposes a design method of high-speed FIR filter based on FPGA. The states conversion between coefficients configuring mode and filtering mode is finished by FSM (Finite State Machine), which ensures the system to work orderly. The experimental results demonstrated, it can reduce the input dimension and eliminate linear and nonlinear interference effectively. In addition, it is very suitable for hardware implementation due to its simple structure.