Advanced Materials Research Vol. 1037

Abstract: Phased array radar (PAR) used for space exploration is a potential technique in many fields such as space target detection, tracking and orbit determination. Nevertheless, it may take a long time for PAR to detect fast-moving targets due to the large searching scope. This paper introduces the compressive sensing (CS) theory used in phased array tracking radar. A fast target searching method and angle-range imaging algorithm based on CS theory are presented, which can reduce the scanning time, sampling and processing data storage. The results of numerical simulation indicate that the proposed method using fewer scanning times can retain almost equal imaging and resolution quality compared to conventional method, which can also ensure the signal-to-noise ratio (SNR) of target detection.

Abstract: The crux in the locally linear embedding algorithm or LLE is the selection of embedding dimensionality and neighborhood size. A method of parameters selection based on the normalized cut criterion or Ncut for classification tasks is proposed. Differing from current techniques based on the neighborhood topology preservation criterion, the proposed method capitalizes on class separability of embedding result. By taking it into consideration, the intrinsic capability of LLE can be more faithfully reflected, and hence more rational features for classification in real-life applications can be offered. The theoretical argument is supported by experimental results from synthetic and real data sets.

Abstract: Electron-microscopic images of interfaces of fast-quenched alloys Fe70Cr15B15, obtained under different regimes of spinning, by using Fraunhofer diffraction patterns and constant-frequency diagrams, had been studied during our work. We applied methods of informo-dynamics at the level of building functionals: energetic U[R(v,α)], responsible for ordering, and entropy H[R(v,α)], characterizing the degree of disorder morpho-inhomogeneties distributions. As additional features for the distribution of inhomogeneities for free and contact tapes surfaces, inform-dynamics potentials are used as tools of spinning process interpretation.

Abstract: Aiming at the file transmission problem between electronic controller for an engine and the portable test equipment based on AT91SAM9263 and Linux, the Interlnk/Intersvr software and their communicating protocol are analyzed and studied which used by electronic controller. The message format and communicating process are made clear by putting up protocol analysis environment at laboratory and source code analysis, FAT file system structure and its access methods are studied, and the file transmission function of test equipment has been fulfilled. The results of test indicate that the desired goals have been reached.

Abstract: With the development of information technology, ERTOS(Embedded Real-Time Operating System) not only has involved in the scientific research and engineering domains, but also has many affinities people's life. Loading pattern performance is the most important performance of Embedded Operating System. It needs dispatching all available resources to achieve real-time task. In order to correctly evaluate the performance of a real-time Embedded Operating System, we must be scientific, systematic approach to ERTOS study of the comprehensive performance and accurate testing. This article discusses three loading patterns and the layout of the memory map on the Flash, RAM and external storage media, with tested on hardware platform it description the advantages and disadvantages of this three loading pattern.

Abstract: This paper has proposed a trust-based security mechanism that aims at the security threat facing the host during the transmission of the mobile agent in agricultural commodity trade. Mobile agent is a program that can autonomously migrate between heterogeneous network hosts. Mobile agent has the characteristics of mobility, autonomy, intelligence, flexibility and other characteristics, making it have wide prospects of application in electronic commerce. Because of the characteristics of mobile agent, its security issues have never been solved well. With the continuous development of mobile agent, mobile agent security has become a vital constraint towards further development of mobile agent technology. A new trust algorithm has been designed for the trust mechanism. By combining the trust mechanism with the model of mobile agent, this paper has realized the trust mechanism in the E-commerce system based on mobile agent.

Abstract: After representing the situation of the spacecraft assembly and the concept of Model Based Definition (MBD), the paper describes the method and principle of Assembly Digital Mock-up (ADMU), which achieved the transition of Engineering Bill of Material (EBOM) to Process Bill of Material (PBOM). With reconstructing EBOM and fulfilling structured Product Attribute, the paper gains the ADMU, which is the data source of spacecraft assembly process design based on 3D models.

Abstract: For the issue that traditional PLC simulation software can not really simulate motion scenes, in order to allow the PLC program can run in the scene intuitively, and the program is compiled to avoid inadvertently causing the actual operation of the collision, we use a combination of simulation software EON and VC + +, build a simulation platform to make compiled program shown in real time simulation system. It achieves interactive control of EON and VC + +. By writing the industry VGA car program, comparing the results out of the simulation program to verify the practicality of the platform. The results show that it is also applicable to larger and more complex systems.

Abstract: This paper discusses the design for virtual laboratory of mechanical drawing, and analyzes the characteristic of mechanical drawing virtual laboratory and the requirements for virtual laboratory, select design platform for virtual laboratory. The method of solid design is discussed in detail. The data structure and the algorithm of modifying data with real-time deformation is designed. And the operating interface with strong interactivity is designed. And at last, a virtual laboratory of mechanical drawing base on Internet is designed.

Abstract: Computer Aided Design (referred to as CAD) is the cross technology of product Design which is applied in engineering field by electronic Computer technology. With CAD technology application is more and more widely and popular, CAD technology is developing towards the direction of the open, integrated and intelligent. CAD technology is become more mature. Nowadays, the CAD technology in mechanical design can only handle numerical work, including calculation, analysis and drawing. The microcomputer platform 3D CAD software showed the trend of rapid development. This paper introduces the development and application of CAD technology, the developing characteristics of modern CAD technology, and explains the development trend of CAD technology.