Applied Mechanics and Materials Vols. 713-715

Abstract: Considering lifting scheme and traditional wavelet packet transform principle, The optimal lifting wavelet packet threshold denoising algorithm was introduced. Experimental blasting vibration signal was decomposed by optimal lifting wavelet packet, and noise components in blasting vibration measured signals were filtered successfully. Research shows that, lifting wavelet package transform can effectively remove noise components, and it laid an important foundation for lifting algorithm will be introduced into the analysis field of blasting vibration effects and other mechanical vibration signal.

Abstract: The problem of target localization and parameter estimation in wideband bistatic Multiple-Input Multiple-Output (MIMO) radar system is considered. In this paper, we use a novel approach to estimate Doppler stretch and time delay in fractional Fourier transform (FRFT) domain. We also develop two sub-array models to accurately estimate the direction-of-departure (DOD) and the direction-of-arrival (DOA). Furthermore, the Cramér-Rao bound for target parameter estimation is derived and computed in closed form. Parameter estimation performances are evaluated and studied theoretically and via simulations

Abstract: Wearable electronic medical devices can realize non-intrusive and non-invasive monitoring of human body, which has the characters of removable operation, easy to use, long-lasting work, smart display diagnostic results, abnormal physiological condition alarms, wireless data transmission, achieve treatment data remote real-time monitoring and so on. In this paper, we collect information of the development process of wearable medical devices, and make the detailed description of the characteristics and development history about wearable electronic medical systems’ hardware and software design, pointing out the shortcomings and the development direction of existing equipment.

Abstract: First, Anti-balance method is used to build the model of q₂,q₃,q₄ to figure out the Function expression of q₂+q₃+q₄ .when q₂+q₃+q₄ gets the minimum, the corresponded to the excess air ratio is the best excess air ratio. The excess air ratio is related to the load of boiler, so the function image describing the relationship between q₂+q₃+q₄ and excess air ratio under the different load of 192.3MW, 215.8MW, 245.3MW and 298MW are made to get the best excess air ratio. Second, based on the model before, new variables q₅ and q₆ are added to complete the function formula of the efficiency and the excess air ratio, and four function image will be drew to show the tends. Finally, based on the conclusions above, smoke vents oxygen content can take the place of excess air ratio to achieve the purpose of monitoring the boiler in real time.

Abstract: A new method to predict ocean wave spectra based on X-band radar is proposed. X-band wave-measuring radar is a new powerful tool to monitor ocean wave, and is the only method that can be used to measure wave spectra onboard and in real-time. This makes wave spectra prediction possible. The real ocean wave is a non-linear process. Through screening time series prediction method based on wavelet neural network is chosen looking at its strong ability on dealing with non-linear problems. The experimental result indicates that this method is of high precision.

Abstract: The high altitude meteorological data is the basic parameters for weapon system trajectory calculation, firing ballistic correction, and ballistic standardization. Measurement range weapon testing is essential to evaluate the final results, so it is accurate or not will directly influence the test. This paper outlines the wind profiler radar in guided missile range experiment and the necessity of working mechanism, and gives the testing environment of radar range test application and erection of wind profiles and parameter setting, finally derived horizontal wind speed measurement precision, theoretical radial velocity measurement accuracy, as well as the theoretical horizontal wind. Making the range test of wind profiler radar measured data can fit the fast and the theoretical solution of data, in order to test application range stroke profile radar has a more comprehensive understanding, and application of more mature and rational.

Abstract: A novel interacting multiple model based on BLUE filter (IMM-BLUE) for tracking a maneuvering target using radar/ESM heterogeneous sensors is presented in this paper. Under the architecture of the proposed algorithm, the interacting multiple model (IMM) deals with the model switching, while the BLUE filter accounts for non-linearity in the dynamic system models. The simulation results show that the presented IMM-BLUE has higher tracking precision than the IMM-DCM, and IMM-EKF.

Abstract: Based that the capacitance proximity fuze detection field is quasi-electrostatic, the field intensity distribution function is formed on the analogy of radio fuze. By simulating a conclusion is drawn that its equifield intensity detection directional diagram is nearly an ellipsoid, whose long axis is 20% longer than the minor one. The study validates the capacitance proximity fuze burst height disperses uniformly while the missile and target intersect differently.

Abstract: The model of airborne radar reconnaissance is one of key models for joint campaign level wargame. On the one hand the joint campaign level wargame system often needs to simulate hundreds of aircraft in once combat simulation which requires high computing capability. On the other hand, a few aircraft can affect the progress of the war in the information war age sometimes, therefore, modern joint campaign level wargame systems need to simulate single aircraft now. In this paper, we proposes a model of airborne radar reconnaissance for joint campaign level wargame based on EBI(Entity, Behavior, Interaction) modeling framework, which can satisfy both the hardware computing capability constraints and simulation granularity requirement for single aircraft. We also give some key mathematical models and algorithms.

Abstract: The model of photon energy distribution in biological tissue has a very important significance in the diagnosis and treatment of biomedical area. The history and development of optical transmission and distribution in the biological tissue is outlined. The structural characteristics and optical properties of biological tissue are explained and discussed. To demonstrate the model of photon propagation in biological tissue, several methods about laser and biological tissue interaction of transmission theory are summarized and the physical meaning of the tissue optical parameters on is considered. On this basis, we simulated near infrared light distribution of the biological tissue with Monte Carlo methods and obtained meaningful results.