道路水湖冻害的产生与治理

本文介绍了在山区高等级公路养护管理中，根据地质条件和冰湖产生的原因，所采取的各种治理措施。     

纯电动客车集成控制器电磁干扰抑制

针对纯电动客车电机控制器产生的电磁干扰,从电路设计、结构布局、屏蔽设计等方面提出抑制电磁干扰的设计方法,使之满足相关要求。     

新型视觉自动引导车辆导航控制器设计

本文简要地介绍了基于机器视觉引导的自动引导车辆的原理和组成，从自动引导车辆的运动学特征出发，结合驱动系统的系统辨识，建立了自动引导车辆的控制模型，然后利用最优控制理论获取极小值的反馈最优控制。通过对被控对象的仿真分析和实验，验证了最优控制器路径跟踪平稳可靠。     

船舶通信网络安全评估模型研究

随着现代化工业的发展,船舶网络通信系统的复杂程度也逐渐提高,在此背景下,对船舶通信网络的安全评估性能也提出新要求。由于传统的通信网络评估架构难以满足现阶段船舶通信网络发展对数据传输的准确性和安全性的要求。为提高船舶综合安全评价水平,优化其工作性能,对船舶通信网络安全评估体系进行建模,以便更好的对船舶通信网络安全进行评估。首先根据船舶通信网络的特点建立基于神经网络的服务器的安全评估系统,并通过神经网络对船舶通信安全性进行检测,以达到提高安全评估的精确性目标。为了对模型安全评估性能进行验证,设置了仿真实验,实验结果证明,与传统的安全评估系统相比,基于神经网络的船舶通信安全评估系统能够更准确、快速的对网络安全情况进行评估。     

Measuring System Regularity Using Fuzzy Similarity-based Approximate Entropy

Approximate entropy (ApEn), a measure quantifying regularity and complexity, is believed to be an effective analyzing method of diverse settings that include both deterministic chaotic and stochastic processes, particularly operative in the analysis of physiological signals that involve relatively small amount of data. However, the similarity definition of vectors based on Heaviside function, of which the boundary is discontinuous and hard, may cause some problems in the validity and accuracy of ApEn. To overcome these problems, a modified ApEn based on fuzzy similarity (mApEn) was proposed. The performance on the MIX stochastic model, as well as those on the Logistic map and the Hennon map with noise, shows that the fuzzy similarity-based ApEn gets more satisfying results than the standard ApEn when characterizing systems with different regularities.     

A Novel Model of F0 Contours Prediction for Continuous Speech

F0 （fundamental frequency） contour was studied under different prosodic environment in continuous speech and a novel model of F0 contours prediction was proposed. It describes syllabic F0 contour with two points, one curve and duration. The curve represents two optimal points of controlling parameters. The duration represents the syllabic duration. The prosodic characters of controlling parameters were analyzed by CART （Class and Regression Tree）. A set of controlling parameters was analyzed, which reflects the linguistic environment and prosodic structure. Then it sets up the model of F0 contours prediction with the two optimal controlling parameters and F0 templates. The end pitch value of previous syllable as special prosodic parameters was used to keep the continuity of fore-and-aft syllable. It focuses on looking out the main prosodic clues hiding in F0 contours and applying it to simplify the model for prediction. The results of synthesis experiment show that the performance of the prediction method is appreciated.