Advanced Materials Research Vols. 774-776

Abstract: This paper evaluates the performance of the networked munitions communication and localization. The key requirements of networked munitions are proposed and analyze the possible technologies for localization. The hardware for communication and localization are selected and designed, the software scheme are illuminated according to the hardware and the project. The experiments prove that the design is effective and satisfies the application of networked munitions.

Abstract: Based on the extended Huygens-Fresnel principle, taking the partially coherent sinh-Gaussian (ShG) beam as a typical example of partially coherent beams, the analytical expressions for the root mean square width and angular spread of partially coherent ShG beams in atmospheric turbulence along a slant path are derived, and used to study the influence of propagation path on the propagation of partially coherent ShG beams in atmospheric turbulence. It is shown that the spreading of partially coherent ShG beams along a horizontal path is larger than that along a slant path in atmospheric propagation. The influence of atmospheric turbulence along a slant path on the partially coherent ShG beams propagation is smaller than that along a horizontal path. Therefore, the slant path is more beneficial to the beam propagation through atmospheric turbulence in comparison with the horizontal propagation. The validity of our results is interpreted physically. Results in this paper may provide potential applications in free-space optical communications.

Abstract: Based on the discovery that there is a good amplitude correlation between neighbour bins of non-stationary signals, we presented a new blind source separation method using Domino Effect relevance ranking that can eliminate the permutation indeterminacy. Since there is no complicated mathematic derivation in this method, it is relatively simple in theory. Furthermore, the outcome of simulation experiments confirmed its validity in blind source separation of communication signals such as QPSK signal. In addition, this method is robust and time saving.

Abstract: High speed packet access (HSPA) was introduced as the evolution of WCDMA system in 3GPP Rel 5 and 6 for downlink and for uplink. Moreover, HSPA+ Rel 7 makes WCDMA more competitive which adopted multi-input multi-output (MIMO) to support two blocks of data in a TTI and 64QAM for modulation to increase the peak rate. In HSPA+ Rel 8, combination of MIMO and 64QAM can further enhance the data rate in the good channel condition. Theoretically, the terminal can support the maximum downlink data rate of about 42Mbps.

Abstract: For the purpose of improving the interference resistance and accuracy of the grating detection system, a SCM-based software design method for grating signal processing is proposed in the thesis. In the method, two differential signals output from the grating detection circuit are amplified and shaped via the conditioning circuit, converted into digital quantity through AD conversion and processed by the SCM. Relying on the programming, properties of direction discrimination and subdivision are attained while effective computation accuracy of subdivided data and signal processing speed are guaranteed. The software processing method simplifies system hardware circuit, cuts down the cost, improves the resolution and measurement precision of the system due to the stable performance and strong interference resistance. The method is experimentally proved to be practical and worthy of promotion, which can be utilized in machine tool reform and relevant position detection systems.

Abstract: The spectral information of weak light will be lost in the process of amplification based on photoelectric conversion. To solve this problem, multi-wavelength optical fiber Raman amplifier is used to pre-amplify the weak light before an ordinary color photoelectric sensor. The Raman gains and their effect factors were modeled and analyzed. The results show high intensity gains can be obtained for red, green and blue components of the weak light simultaneously .

Abstract: We go deep into the internal structure of the Boolean functions values, and study the relationship of algebraic immunity and algebraic degree of Boolean functions with the Hamming weight with the diffusion included. Then we get some theorems which relevance together algebraic immunity, annihilators and algebraic degree of H Boolean functions by the e-derivative which is a part of the H Boolean function. Besides, we also get the results that algebraic immunity and algebraic degree of Boolean functions can be linked together by the e-derivative of H Boolean functions and so on.

Abstract: Cyber physical system (CPS) mainly means that the conjoining of information and physical resources. The physical elements, which could be treated as spatial resources, need be queried through information field. The key problem is how to construct spatial resource index structure and accordingly retrieving algorithm. The spatial retrieving algorithm is widely used in the Internet and moving object. The traditional spatial resource retrieving algorithms ignore the uncertain factor of the spatial resource, which is the important feature of the military resource network. This paper use an index structure named BIR-tree, based on the belief of resource, we also propose corresponding efficient and accurate top-k retrieving algorithm. On the base of traditional IR-tree, we define the resource and regional belief aiming at special spatial environment. The results of our empirical studies with an implementation of the proposed algorithm show it is capable of excellent performance.

Abstract: Personalization of model-based cloud computing platform based on specialized user models has become more important in order to preserve the effectiveness of their service as the amount of available content increases. In this paper, a users profile model is imported to the cloud computing. We propose a method of modeling users profile for cloud computing, and establish a simple users profile. At last, we use this model in the Google App Engine for searching some service to prove that importing the users profile model is useful and efficient for cloud computing service.

Abstract: In this paper ,we explored the new method of urban design modeling based on a new rule-based parametric modeling software: CityEngine. Through combining the technology of CityEngine and ArcGIS, we can solve the problems existing in traditional urban design: complex modeling process, poor 3D visualization, low efficiency of modification and poor public participation, and can expand the new technique applications in urban design.