QAM-OFDM雷达通信共享信号长时间相参积累算法

QAM-OFDM(Quadrature Amplitude Modulation-Orthogonal Frequency Division Multiplexing)雷达通信共享信号因携带随机通信信息，其脉压旁瓣的随机性较大，类似噪声的影响。针对该问题，采用基于Keystone变换的长时间相参积累算法抑制其旁瓣。在共享信号模型的基础上，分析了其脉压旁瓣受随机通信信息的影响以及采用长时间相参积累抑制其旁瓣的可行性，然后采用Keystone变换校正其长时间相参积累产生的距离单元走动，并进行多普勒模糊补偿处理。理论分析和仿真结果表明，该方法使得回波能量积累集中，能有效实现共享信号脉压旁瓣的抑制。     

Stock market recovery from the 2008 financial crisis: The differences across Europe

This study investigates the influence of the 2008 financial crisis on a number of European stock markets. The sample includes EU benchmark indices as well as European markets with slowed or hampered recovery over a period of ten years (2004–2014) thus allowing a comparison on their development before, during and after the crisis. We utilize a novel approach based on a combination of stochastic modeling and continuous wavelet transform. It enables a robust distinction between expected and unexpected spillover effects as well as assessment of the expected speed of European stock markets recovery. It further quantifies the temporal boundaries of absorption of negative and positive shocks coming from the US stock market and explains the observed asymmetry. The studied European markets are divided into several groups and expectations are built on the speed of their recovery. We find that the major reasons for the discrepancies observed between actual and expected recovery for some of the markets are due to structural breaks in the co-movement with US market as well as to weak domestic fundamentals.     

落实科学发展观,促进可持续发展——宁波献血事业的现状分析和可持续发展对策

本文从宁波献血事业发展的现状来探讨宁波献血事业落实科学发展观的必要性和紧迫性。其意义在于通过剖析宁波献血工作的发展现状,揭示进一步落实科学发展观的必要性和紧迫性,并对今后的献血事业进行理论探索和现实指导。     

中美会计准则关于借款费用资本化处理的比较与思考

随着世界经济全球一体化的发展 ,特别是中国加入WTO之后 ,中国会计制度与会计处理方法同国际接轨是一个必然趋势 ,这是一个从不完善到完善的渐进的过程。比较中美会计准则在借款费用资本化处理上的差别 ,提出一些问题与大家共同商讨。     

PRICING AND HEDGING DOUBLE-BARRIER OPTIONS: A PROBABILISTIC APPROACH

Barrier options have become increasingly popular over the last few years. Less expensive than standard options, they may provide the appropriate hedge in a number of risk management strategies. In the case of a single-barrier option, the valuation problem is not very difficult (see Merton 1973 and Goldman, Sosin, and Gatto 1979). the situation where the option gets knocked out when the underlying instrument hits either of two well-defined boundaries is less straightforward. Kunitomo and Ikeda (1992) provide a pricing formula expressed as the sum of an infinite series whose convergence is studied through numerical procedures and suggested to be rapid. We follow a methodology which proved quite successful in the case of Asian options (see Geman and Yor 1992,1993) and which has its roots in some fundamental properties of Brownian motion. This methodology permits the derivation of a simple expression of the Laplace transform of the double-barrir price with respect to its maturity date. the inversion of the Laplace transform using techniques developed by Geman and Eydeland (1995), is then fairly easy to perform.     

台湾中小企业发展新趋势

台湾地区的中小企业运用独特生产经营之道,占据台岛经济半壁江山,为经济高速增长做出贡献。台湾中小企业面对经济和社会步入转型期新的形势,正积极探索管理和营销新路,推动中小企业全面技术进步和产业升级,促其尽早实现质的蜕变。     

煤矿回采巷道变形破坏机理及其支护方法

对煤矿回采巷道变形破坏的现状做了描述,分析了造成这种现象的原因,并对回采巷道的支护方法提出了建议。     

社会变革与晚清法律译介活动初探

社会变革是晚清法律译介活动开启、促进和发展的最基本动因。中国加入WTO后需加强法律翻译工作,使法律输入和输出同时并举,相得益彰。     

应用“扎根理论”构建顾客忠诚的动态转化模型

文章采用扎根理论方法对“顾客忠诚”的驱动因素、流程与机理进行研究,得出“顾客忠诚”是处于动态循环链中的、某一段时期内的一种状态平衡的结论,指出它是由“维持顾客忠诚”和“导致忠诚突变”的两类因素进行持续博弈的结果,随着熵的积累,这种平衡最终将被打破,而产生忠诚突变,并继而开始新一轮“顾客忠诚”状态的形成与演化,基于这些结论,构建了顾客忠诚的动态转化模型。     

基于小波变换的GPS变形监测数据处理方法研究

工程实测变形信号不可避免的受到噪声的污染,为了提取真实的变形信号,要对实测数据进行降噪处理。结合武汉某大桥GPS实测变形数据介绍了小波变换阈值降噪过程,分别采用不同的小波函数和不同阈值模型进行降噪处理。根据信噪比、中误差两种降噪质量评价指标的定量比较,得出用db6小波和heursure阈值在软阈值量化作用下降噪效果较其他小波函数和阈值模型效果好。