Applied Mechanics and Materials Vols. 599-601

Abstract: Most transportation monitoring systems are based on the U.S. GPS + GSM / GPRS / CDMA or shortwave radio communication network to achieve positioning and monitoring. This type of system positioning part, because the United States belong GPS applications in key areas may be controlled by others; monitoring transport vehicles through the mobile communication network, increasing the cost of the system, and does not have the characteristics of real-time monitoring. In this paper, the characteristics of the above proposed transport vehicle monitoring and dispatching system for China's own Beidou navigation system developed is based. The system uses positioning and communication system Beidou satellite communications, real-time monitoring of transport vehicles and scheduling, to ensure normal transport.

Abstract: Indicating vertical in moving base to establish horizontal reference is of great significance for the near-earth autonomous navigation. Existing vertical indicating device achieves the goal by using gyro stabilized platform, but the gyroscope is difficult to maintain and has drift error. This paper proposes controllable pendulum system that is a stable closed-loop control system and similar to inverted pendulum system to accomplish the purpose. This paper covers the preliminary validation of the controllable system’s ability of indicating vertical in pulse interference cases and raises the defects of system under condition of step disturbance, by establishing mathematical model, designing double output PID controller and analyzing error , which lays the foundation for follow-up study.

Abstract: Based on the elementary method, the formulas of the probability distribution of the number of runs and its mathematical expectation and variance are proposed. Furthermore, an application of the number of runs in biological medicine testing is discussed.

Abstract: In actual operation, the rising load will lead to the reduction of pressure because of the long delay of the boiler. It can lead to the main steam pressure lockout in severe cases. The proposed model is derived by the principle analysis of control object and the introduction of load feedforward. The unidirectional decoupling method is verified by the simulation in Matlab. Not only the decoupling has achieved good results, but also the performance of the control system has been greatly improved. All the above study are based on a 1000MW power unit.

Abstract: The traditional BP neural network algorithm is applied to intrusion detection system, detection speed slow and low detection accuracy. In order to solve the above problems, this paper proposes a network intrusion detection algorithm using genetic algorithms to optimize neural network weights. which find the most suitable weights of BP neural network by the genetic algorithm, and uses the optimized BP neural network to learn and detect the network intrusion detection data. Matlab simulation results show that the training sample time of the algorithm is shorter, has good intrusion recognition and detection effect, compared with the traditional network intrusion detection algorithm.

Abstract: The paper research the radio signal monitoring and analysis of digitized for Army Digital Force Training. aimed at scientific planning and the use of spectrum resources, developed a set of visual assistance decision support tool based on component-based and soft bus design method, it will provide support for digital forces training and research accused the rules and characteristics the use of communications equipment in a complex electromagnetic, in addition, it provide technical means for radio direction-finding and localization. Keywords: Digital Force; radio monitoring; software bus

Abstract: The main subject of this thesis is to study a uneasily two-wheeled self-balancing vehicle system. Two tires are placed on two sides of the body parallel in this system . Controlling the rotation of two DC motors can achieve the goal of walking upright. The circuit part is mainly made up by attitude sensors parts (including Gyroscope and Accelerometer), control circuit and the driver board. Attitude sensors measure the tilt angle and the rate of change of inclination of vehicle, and then the controller calculate the responding data and finally drive two DC motors forward or backward to produce forward or backward acceleration to make the car balancing.

Abstract: The surface of workpiece in NC turning process, often encounter the workpiece surface cross quadrant arc, if the use of the same processing methods and ordinary arc, often leads to the emergence of cross quadrant arc machining shape error, through the research of the NC machining of workpiece surface cross quadrant arc, CNC turning reasonable go knife and tool path in NC turning, solve cross quadrant arc, some defects in the surface of the workpiece processing, ensure the machining with circular arc profile theory demands, so as to improve the machining quality and the machining accuracy requirements.

Abstract: Simtlink is not only intuitive, but also programming steps can be reduced. The mode on single-phase bridge type all control the rectifier circuit is built which is based on Simulink/ MATLAB. According to the different parameters of circuit simulation, they can further deepen single-phase bridge type all control the rectifier circuit theory, as well as modern power electronics is established.

Abstract: In order to build a truly open OpenDSS and enhance the complexity of decision-making DSS for solving the problem of voltage control. a new model was given based on MAS in grid environment. Making use of the intelligence of MAS and adaptive capacity, based on the reasoning mechanisms for task decomposition and resource decision-making grid matching, a new intelligent algorithm based on MAS in order to improve its control effect, and the paper uses the kind of algorithm to coordinated secondary voltage control. The simulation results show the voltage control based on the algorithm have better global best properties and coordinate voltage effectively than routine method.