Application of Mellin Transform in Wideband Underwater Acoustic Signal Processing

According to the features of the wideband underwater acoustic signals, an algorithm for the wideband ambiguity function is put forward based on Mellin transform. The wideband acoustic signal processing using the fast Mellin transform is also explored. The theoretical analysis and simulation results show that the algorithm has not only high computation efficiency but also good concentration in wideband ambiguity domain. It suits for the wideband underwater acoustic signal processing.     

OPTIMAL TORQUE CONTROL STRATEGY FOR PARALLEL HYBRID ELECTRIC VEHICLE WITH AUTOMATIC MECHANICAL TRANSMISSION

In parallel hybrid electrical vehicle (PHEV) equipped with automatic mechanical transmission (AMT), the driving smoothness and the clutch abrasion are the primary considerations for powertrain control during gearshift and clutch operation. To improve these performance indexes of PHEV, a coordinated control system is proposed through the analyzing of HEV powertrain dynamic characteristics. Using the method of minimum principle, the input torque of transmission is optimized to improve the driving smoothness of vehicle. Using the methods of fuzzy logic and fuzzy-PID, the engaging speed of clutch and the throttle opening of engine are manipulated to ensure the smoothness of clutch engagement and reduce the abrasion of clutch friction plates. The motor provides the difference between the required input torque of transmission and the torque transmitted through clutch plates. Results of simulation and experiments show that the proposed control strategy performs better than the contrastive control system, the smoothness of driving and the abrasion of clutch can be improved simultaneously.     

基于改进Snake模型的工业CT图像内窥显示及测量

鉴于工业CT（ICT）图像具有目标形状比较复杂的特点,采用基于贪婪算法的改进主动轮廓模型进行图像分割,实现工业CT图像中三维目标的内窥显示及测量。实验结果证明了算法的有效性。     

移动信息接收机的研制

介绍了一种新型的通信传媒设备，详细介绍了该接收机的工作机理、结构、功能特点以及软硬件的设计思路。     

多通道微信号数据采集与显示系统

概述了矿区电网的特点以及进行无功优化的必要性。综合系统电压的静态稳定性,建立了多目标无功优化数学模型针。针对粒子群优化算法在进化中随种群多样性降低易出现早熟收敛等问题,引入混沌粒子群优化算法。将该算法应用于矿区电网无功优化中,仿真结果验证了该算法的优越性。     

基于Web的3D智能虚拟人估计及系统实现

随着互联网和软件的不断发展及对人们工作和生活的不断渗透,产生了对各种智能交互系统的需求,智能虚拟人就是一种很好的方式来实现和满足智能交互的需求.通过结合课本知识,网上资料和导师的指导研究了网站搭建技术和3D建模技术两者的有效结合的系统,最主要是构建一个智能的3D虚拟人,充当房子导购员与进入网站的顾客进行简单的房屋展示和简单的买卖房子交流从而做出正确的购房选择.     

用Delphi 6.0+object Pascal语言开发的丙酮碘化实验软件

利用Delphi6．0 object Pascal语言开发的丙酮碘化实验软件。本软件利用Delphi6．0所带的控件,实现了从分光光度计数据直接采集到数据处理,图形化显示及结果处理一整套过程,利用该软件和所配套的实验设施,可方便地开展丙酮碘化实验。该软件不需要任何应用软件支持,可以在Windows98／XP下直接运行,具有界面友好,操作方便,图形化显示,运行稳定性很好等优点。     

Preparation and Properties of Amorphous NiFe/Cu/NiFe Thin Films

The amorphous of Permalloy on the copper subtract was studied using composite electroplating method. A portion of hydrogen brings the counteraction on the surface of cathode leading nickel-iron alloys to be anomalous in the process of co-depositing. The results of X-ray diffraction (XRD) show that the Ni-Fe alloys layer is amorphous. The Giant Magneto -Impedance (GMI) effect of Ni-Fe alloys was obtained under the optimal conditions, dependence on the soft magnetic property of Ni-Fe amorphous thin film. As a result, the ratios△ Z/Z of NiFe/Cu/NiFe amorphous thin film are 30% at 40 kHz which is in low frequency. Furthermore, the GMI value of NiFe/Cu/NiFe amorphous thin film with a sandwich structure is higher than that of single-layer ferromagnetic films of the same thickness.     

定量荧光及地化方法识别真假油气显示

钻井液添加剂的使用会不同程度的影响录井识别的准确性。复杂录井条件下，应用定量荧光及地化参数分析录井技术识别有机添加剂污染，可以快速准确识别真假油气显示，对于油气的发现具有重要意义，值得在钻井施工中推广。     

Extended Range Guided Munition Aerodynamic Configuration Design

Based on the analysis of the flying scheme and flying style of an extended range guided munition(ERGM), the aerodynamic characteristics design standards were put forward. According to the standards, the ERGM aerodynamic configuration was designed, and the wind tunnel experiments were processed. The experimental results show that the configuration has lower drag and good static stability at unguided flying stage. Moreover, the stability, maneuverability, rudder deflection angle and balance angle of attack of the configuration are all reasonably matched at guided flying stage, and the munition with the configuration can glide with larger lift-drag ratio at little balance angle of attack. The experimental results also indicate that the canard can't conduct rolling control when 1.0< Ma < 1.5, so the ERGM must take rolling flight style with certain limited rolling speed.