弹性分组多环网络的可靠性分析

弹性分组环(RPR)多环网络缺乏可靠性模型及相应分析,使得多环网络的设计参数很难选取,为设计高可靠性网络带来困难。该文提出了RPR多环网络的可靠性模型,利用概率理论分析提出了弹性分组环多环网络的可靠性函数以及平均失效时间函数。结果表明影响多环网络可靠性的主要参数是子环节点数分布,并且利用Lagrange乘数法证明了多环网络在子环节点分布均匀时可靠性达到最优;因此设计节点均匀分布的多环网络可以大幅度提高网络的可靠性,为设计高可靠性多环网络提供了理论依据。     

改进的混合遗传算法的组卷系统模型及算法

在基本遗传算法基础之上,针对试题库组卷系统对算法进行改进,设计了一种运用于组卷系统的数学模型和混合遗传算法,从而提高组卷质量和系统的通用性。     

基于Plone/Zope内容管理系统构建企业技术情报服务平台

阐述了内容管理系统和技术情报服务平台的含义,介绍了构建企业技术情报服务平台的工作流程,探讨了利用PLONE/Zpe内容管理系统构建技术情报服务平台的原因及技术情报服务平台的具体内容,指出中小型企业可在此平台上进行技术情报的存储、检索、传递、学习等工作,从而快速、经济地开展企业技术情报工作,为企业发展服务.     

InSAR技术提取矿区DEM方法研究及应用

重点研究了应用InSAR提取矿区DEM的技术方法,探讨了数据选取和实际数据处理时针时矿区特点应注意的问题,时进一步提高DEM精度提出了建议.     

智能建筑实验教学平台的研究

阐述了构建智能楼宇实验室必要性及智能建筑实验平台的构建原则,探讨了智能建筑实验平台在实践教学中的应用,以河北工程大学信息与电气工程学院为例,提出了智能建筑实验室的建设实施方案.     

藏药雪茶的民族植物学研究

本文从民族植物学的观点介绍了藏药雪茶的文献记载、植物学形态、分布及品种、民间应用方法,论述了国内外对雪茶的化学成分、药理作用、植物资源等方面的研究状况,通过对资料的收集整理,有助于充分开发和利用这一丰富的药用民族植物资源．     

论《开放物理实验》教材的编写原则

详细介绍了编写《开放物理实验》教材应遵循的3条原则,即在编写形式上要突出以学生为主体的原则,内容上要以学生原有的认知结构为依据,选材上要发挥参考文献的灵活性特点,以求最大限度地提升教材的使用功能。     

Evaluation of frequency-lowering algorithms for intelligibility of Chinese speech in hearing-aid users

Despite the attention being given to and the knowledge of the benefits of evaluating frequency-lowering algorithms for hearing-impaired people, the causality between these algorithms and their benefits is still not clear. This is aggravated by the fact that comparative research on the methodologies and skills required for fitting an appropriate algorithm to individual patients is lacking. Against this back-drop, the current study has attempted to make progress in this area. In this experiment, six experienced traditional hearing-aid users with severe impairments in the high frequencies were fitted with two different frequency-lowering methods, and weekly hearing tests were con-ducted to track the benefits of such methods. After the experiment, five of the listeners accepted the frequency-lowering algorithms. Both methods showed superior results when compared with the listeners' own hearing aids in most of the tests, and the segmented compression algorithm was indicated to have better "anti-noise" quality and speech intelligibility improvement capabilities. A preference for the appli-cation of proportional compression to unvoiced speech was also found in this algorithm. Unlike in previous studies, all speech materials here are recorded in Chinese. Therefore, the results could also be used to evaluate the benefits of frequency-lowering to the intelligibility of Chinese speech for patients. As a result, an improvement was found, especially in the recognition of consonants. Moreover, no adverse effect was found in intonation recognition.