A Combined Speaker Adaptation Method for Mandarin Speech Recognition

A speaker adaptation method that combines transformation matrix linear interpolation with maximum a posteriori (MAP) was proposed. Firstly this method can keep the asymptotical characteristic of MAP. Secondly,as the method uses linear interpolation with several speaker-dependent (SD) transformation matrixes, it can fully use the prior knowledge and keep fast adaptation. The experimental results show that the combined method achieves an 8.24% word error rate reduction with only one adaptation utterance, and keeps asymptotic to the performance of SD model for large amounts of adaotation data.     

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车流速度和道路安全性有非常密切的关系。通过信息和先进的车辆设备对道路上的车速管理是一种灵活的方式，智能速度顺应系统ISA就是其中之一。现在一个全欧洲的联合合作正在开始对ISA的潜力进行研究。本文介绍了ISA的概念和它在速度管理上可能的效果；该文阐述了ISA 在技术上的实施和部署的最新情况，并调查了ISA在道路网络中的作用。最后介绍了一个微观模拟模型的详细方法，该方法用于分析ISA在实际城市网络中的效果。     

多级挣值法在船厂作业进度管控中的应用

针对挣值法在船厂作业进度管控时偏重于单项目整体进度管控而忽略项目内部任务包逻辑关系的不足,本文在挣值法的理论基础上,结合船厂作业基本单元-任务包,提出了基于任务包的多级挣值法,并以船厂某总段建造为例对该方法应用效果进行分析。通过研究表明,基于任务包的多级挣值法弥补了挣值法的不足,实现了对船厂作业进度有效的管控。     

综合运输系统协调发展的灰色关联度分析

针对综合运输这个复杂、抽象的巨系统,基于灰色系统理论,对影响其协调运行的因素进行灰色关联分析,弥补采用传统数理统计方法做系统分析时所导致的缺憾。     

Optimality of environmental policies in air transport markets and changes in the schedule delay: A theoretical approach

Air transport provides essential services in modern economies, though it produces significant negative external effects on the environment. Air quality, greenhouse gas emissions and noise are the main issues. The current environmental regulatory practice in air transport usually devises policy interventions for each externality in isolation disregarding their impact on the schedule delay, which in turn affects the consumers’ generalized price and social welfare. In this paper we develop a theoretical model that shows that such an approach is inadequate, and may lead to the choice of wrong environmental policies.     

综合监测船电力推进系统设计

介绍上海船舶研究设计院设计的综合检测船电力推进系统及其电站的设计与选配,并对其配置进行谐波分析,并介绍了其电力推进船舶电站管理系统的特点以及推进系统的外部接口。     

盾构推进姿态控制策略研究

为提高盾构施工过程中姿态控制系统的控制精度和控制性能,提出一种盾构推进姿态控制策略。该策略将轨迹自动跟踪控制方法与模糊自适应PID闭环控制算法相结合,通过轨迹、位移、压力等多个闭环反馈实现对各个分区液压缸的速度控制,保证盾构推进轨迹按照设计的隧道轴线运行,并通过电液控制试验平台中的推进系统对提出的策略进行试验验证。结果表明,文章提出的控制策略能够使位移偏差维持在5 mm之内,可以很好地满足施工要求。     

基于LCCMA 的盲自适应多用户检测新算法

基于LCCMA(线性约束恒模算法)提出了一种新的盲自适应多用户检测算法。本文中提出的这种算法适用于多径衰落信道,能很好抵消多址干扰和克服多径衰落。仿真证明,这种算法的性能和基于子空间分解的多用户检测算法的性能相当,但运算复杂度低于子空间算法。因此这种算法的总体性能优于基于子空间分解的多用户检测算法,是值得进一步研究的课题,并使之推广应用。     

Coastal Management Using Public Judgments,Importance Scales,and Predetermined Schedule

A predetermined schedule of sanctions and regulations that reflect both scientific knowledge of resources and the preference and judgments of resource users in the community may provide a useful guide for management decisions involving complex coastal resource systems. Such a schedule can be implemented by constructing scales reflecting public judgments of the relative importance of adverse impacts on resources, or of activities causing such impacts. The importance scales can then be used to assess existing regulations and current management priorities and to serve as a guide for revisions and changes to current practice, for the design of new policy, for rationalizing regulatory controls, and for determining damage awards and other deterrence sanctions. The resulting evolution of a schedule can improve the consistency of resource use with community preferences by, for example, prescribing more severe restrictions on what are widely agreed to be more serious harms and lesser controls on less important ones. The application of this approach is demonstrated using Ban Don Bay, Thailand.     

Science Needs for Sea-Level Adaptation Planning: Comparisons among Three U.S. Atlantic Coastal Regions

To identify priority information needs for sea-level rise planning, we conducted workshops in Florida, North Carolina, and Massachusetts in the summer of 2012. Attendees represented professionals from five stakeholder groups: federal and state governments, local governments, universities, businesses, and nongovernmental organizations. Over 100 people attended and 96 participated in breakout groups. Text analysis was used to organize and extract most frequently occurring content from 16 total breakout groups. The most frequent key words/phrases were identified among priority topics within five themes: analytic tools, communications, land use, ecosystem management, and economics. Diverse technical and communication tools were identified to help effectively plan for change. In many communities, planning has not formally begun. Attendees sought advanced prediction tools yet simple messaging for decision-makers facing politically challenging planning questions. High frequency key words/phrases involved fine spatial scales and temporal scales of less than 50 years. Many needs involved communications and the phrase “simple messaging” appeared with the highest frequency. There was some evidence of geographic variation among regions. North Carolina breakout groups had a higher frequency of key words/phrases involving land use. The results reflect challenges and tractable opportunities for planning beyond current, geophysically brief, time scales (e.g., election cycles and mortgage periods).