以语音识别为基础的音乐检索系统

针对一般的语音识别算法均存在抗噪能力不好的问题,无法满足音乐检索系统的需求。针对于此,本文以抗噪能力为基础对MFCC语音识别算法进行了优化,第一步是通过F比方法加权优化了MFCC算法的特征参数,估计出各维特征分量对识别率的影响,并将其提取出来,然后采用主成分分析法对提取的特征分量进行降维处理,以降低计算复杂度,减少数据存储量,加快训练时间,最终提高识别效率。算法仿真结果表明,本文提出的基于抗噪能力优化的MFCC语音识别算法具有较好的抗噪能力,比传统MFCC算法对音乐检索的精确度更高。     

超F幻方的奇妙特性

揭示了超F幻方的更多的奇妙特性并给出了严格的证明。     

锦屏一级水电站坝基f2断层水泥灌浆施工技术

断层及层间挤压错动带采用高压水冲洗置换灌浆的方式进行处理,能够冲洗出一部分软弱介质,冲洗后的空腔再采用水泥浆液进行置换固结灌浆,相当于在断层上施加了水泥柱桩,提高了断层基础的承载力。本文介绍锦屏一级水电站大坝左岸f2断层高压冲洗水泥置换灌浆加固施工技术的成功运用。     

从艾森豪威尔到肯尼迪:美国对日政策的转变

1960年日本"安保危机"之后的困局促使美国对日政策从"占领者"心态向"平等伙伴关系"心态转变。艾森豪威尔时期的美日关系虽然得到了很大程度上的改变,但是,美国对日政策仍带有很强的"占领者"色彩。肯尼迪时期,美国适应新形势的需要,着手调整对日政策,采取了"单边"贸易自由化、美日事前协商框架等政策,开始向"平等伙伴关系"转变,试图重构美日关系。     

(International) R&D collaboration and SMEs: The effectiveness of targeted public R&D support schemes

This study analyses the impact and effectiveness of targeted public support for R&D investment at the firm level. We test whether the policy design aiming at incentivizing (international) collaboration and R&D in SMEs achieves input as well as output additionality. Our results show that the targeted public subsidies trigger R&D spending, especially so in internationally collaborating SMEs. We further evaluate the different impact of privately financed and publicly induced R&D investment on innovation performance. The results confirm that the publicly induced R&D is productive as it translates into marketable product innovations. While both types of R&D investments trigger significant output effects, the effect of policy-induced R&D investment on sales from market novelties is highest for international collaborators as well as for SMEs.     

Multinational subsidiary knowledge protection—Do mandates and clusters matter?

International knowledge spillovers, especially through multinational companies (MNCs), have recently been a major topic of academic and management debate. However, most studies treat MNC subsidiaries as relatively passive actors. We challenge this assumption by investigating the drivers of knowledge protection intensity of MNC subsidiaries. We argue that knowledge protection intensity is determined by MNC subsidiary mandates and by opportunities and risks originating from the host region. We hypothesize that not just competence-creating but also competence-exploiting mandates increase knowledge protection intensity. In addition, technological cluster regions in the host country can be expected to provide opportunities for knowledge sourcing and MNC subsidiaries may be willing to protect knowledge less intensively to participate in cluster networks. We test our hypotheses using a dataset of 694 observations of 631 MNC subsidiaries in Germany and develop recommendations for research, managers and policy makers.     

方差分析中F统计量计算教学研究

以具体工作中方差分析的两个例子,尝试回答方差教学中经常碰到的两个问题,(1)方差分析能解决什么问题;(2)怎样解释方差分析中F统计量的计算。通过教学过程两种讲授方法的比较,得出从样本数据分布的视角进行F统计量计算的教学方法效果更好。     

大气中F与ClNO_2/ClONO反应机理的理论研究

用B3LYP理论研究了大气中F与硝酰氯(ClNO2)及顺/反亚硝酸氯(ClONO)分子反应的机理.在6-311++G**的基组水平上,优化得到了反应物、过渡态、中间体和产物的几何构型,通过振动分析对过渡态和中间体构型进行确认.计算结果表明:F与ClONO分子的反应有三种不同的反应机制,而对ClNO2分子的进攻有两种不同的反应方式.其中F与cis-ClONO发生的直接Cl提取反应是主反应通道,产物P1(NO2+ClF)为主要产物.     

运动对糖尿病大鼠ASP影响的研究

研究运动对链脲佐菌素所致糖尿病大鼠ASP的影响。选用雄性SD大鼠，随机分为4组（每组10只），即：正常对照组，正常运动组，糖尿病模型组，糖尿病模型＋运动组。运动组进行10周的游泳训练。结果表明：1）糖尿病模型组与正常对照组大鼠相比，血浆ASP浓度、血糖、TG、和LDL明显升高，血清FFA有升高趋势，血清胰岛素和ISI明显降低；2）糖尿病模型＋运动组较其非运动组血浆ASP浓度、血糖、TG、TC、FFA和LDL明显降低，血清胰岛素和HDL含量明显升高。提示：糖尿病机体血浆ASP浓度升高，伴随着其活性下降，使得FFA和富舍TG的脂蛋白消除障碍，长期中等负荷运动可以降低血浆中ASP浓度，增加其活性，进而降低FFA和TG水平，升高HDL，改善糖尿病机体的脂质代谢，预防其慢性并发症的发生。     

恩格斯编辑《资本论》第二,三卷的方法研究

运用历史唯物主义思想，对恩格斯编辑《资本论》第二、三卷的经验作了研究，重点探讨了恩格斯编辑《资本论》第二、三卷的方法，对其进行了归纳，并指出学习、研究恩格斯编辑《资本论》第二、三卷的理论意义和现实意义。