Portmanteau tests based on quadratic forms in the autocorrelations

Many white noise and goodness-of-fit tests are (asymptotically) written as quadratic forms in the ordinary autocorrelation estimates. The properties of such tests are studied by investigating the structure of the matrix of the quadratic form. We suggest to choose the matrix of the quadratic form in such a way that the power is maximized according to the information available about the alternative hypothesis. A simulation study sheds some light on the behavior of the test in finite samples. It is generally found more powerful than the most popular portmanteau tests, i.e., the Box and Pierce and the Ljung and Box tests.     

On Some Applications of Poisson Point Processes

Poisson point processes play important role in various domains of Probability Theory and Mathematical Statistics. In this article, we investigate only two applications of Poisson point processes: a generated white noise problem and parameters estimation problem. This work continues the investigations started in paper Egorov and Kondybaev (2009 Egorov , V. A. , Kondybaev , N. S. ( 2009 ). On the estimation of a signal covered by background om Poisson noise . Methods and programs of data processing 4 : 75 – 81 . [Google Scholar]).     

The internal death of Japanoise

Japanese noise music (Japanoise) has strong associations with death. In the early stages of Japanoise’s development, practitioners would often make reference to eroticism, violence and death in their performances and album artwork to help visualise the “excess” of their sound. The discourse of Japanoise also draws on these associations, through concepts such as disembodiment, to help frame this transgressive enterprise. Death becomes a way of visualising and conceptualising a subversive style of music that attempts to leave the world of limits and meaning. Paul Hegarty and Eugene Thacker both account for Japanoise in these terms. Although death is only implicit in their writing, it will be argued that this understanding of death is essential to what Hegarty means by failure and what Thacker means by disembodiment. This paper will show how, for both theorists, death names a paradoxical yet extreme form of possibility that enables Japanoise to test limits. However, the problem with this understanding is that it holds Japanoise to a limited framework. It essentialises the concepts of negativity and subversion to the economy of Japanoise. This paper will argue that Japanoise cannot be limited to these concepts if it hopes to be more than an oppositional form of music and a tired form of transgression. This requires that its relationship with death not be reduced to a form of production or act of will. By arguing that Hegarty and Thacker’s accounts of noise can be read as Heideggerian, this essay will critique this understanding by drawing on Maurice Blanchot’s account of death. This critique will show how a different understanding of death enables a more nuanced understanding of Japanoise.     

考虑噪声因子的参数和公差经济性设计策略

基于并行工程思想的参数和公差经济性设计,以成本为优化目标来确定最优的设计参数和公差范围.就并行参数和公差设计通过双响应曲面均值和方差模型实现其稳健性,本文提出了包含噪声因子的响应曲面建模策略,应用这一模型将参数和公差同时优化.该参数和公差经济性设计优化模型以质量损失和制造成本之和为目标函数,以过程方差置信域为约束.实例结果表明,在双响应曲面方法中,对均值设置偏倚量比其刚性约束具有较大的成本优势,在不降低稳健性的前提下引入偏倚可以降低成本.面向噪声因子的设计策略其成本低于基于双响应的有偏倚的设计,说明考虑噪声因子的设计是最有效的.     

谈PSM中波发射机杂音指标的维护经验

作者就PSM发射机的调制系统杂音的维护方面,总结了调制器部分出现故障的处理方法和维护经验,并把维护杂音指标的关键作以详细剖析。     

电动喷枪噪声源识别的实验研究

针对某型电动喷枪存在噪声过大的问题,通过声压测试实验对电动喷枪5个工况下的A计权声压级进行分析,并对空载情况下的整枪1/3倍频程谱进行分析,得出壳体振动是产生电动喷枪噪声的主要原因。并将各噪声源分离出来,从而提出通过改变壳体结构减少振动的方法来降噪。     

CMOS环型压控振荡器的设计

设计和分析了一种高稳定度、低噪声的CMOS环型压控振荡器。该电路具有较低的压控增益,较好的线性范围,较低的相位噪声。应用复制偏置电路,对差分环型压控振荡器的控制电压进行复制,通过对压控振荡器相位噪声的计算和分析,以提高对环型压控振荡器电源电压噪声和衬底噪声的抑制。该设计和分析是基于上华0.5μmCMOS工艺,当控制电压从1～3V变化时,相应的振荡频率为100～500MHz;在偏离中心频率1kHz、10kHz、100kHz和1MHz频率处得到的相位噪声分别为?50dBc/Hz、?75dBc/Hz、?98dBc/Hz和?120dBc/Hz。     

股指期货基于信息传递效应稳定作用的局限性

股指期货对现货市场的波动有潜在的影响。有学者认为股指期货能向现货市场传递信息,可提高信息质量,加快证券价格对新信息的反应速度,促进信息效率,从而起到稳定市场的作用。但是,股指期货信息传递效应对现货市场的稳定作用具有一定的局限性,这种局限性源于：第一,股指期货有限的价格发现功能;第二,股指期货有可能向现货市场传递有噪音信息;第三,市场解释信息方式影响稳定作用发挥的程度;第四,股指期货引起信息同质性,使市场丧失信念多样性,更易反应过度。     

《苦闷的象征》:西方文化思潮的创造性整合

《苦闷的象征》深受西方文化思潮的影响,它吸收精神分析心理学中“冲动——压抑——转化”说的理论框架,但对其具体内容加以改造(一)用柏格森哲学中的“生命力”代替其冲动之根源——“性本能”,并赋予“生命力”现实性、创造性内涵;既与柏格森划清了界限,又把“生命力”与克罗齐的“创造性”联系起来。(二)用“生命力”代替被压抑之物——“本我”,用“社会外界约束”代替压抑之力——“超我”,把偏狭的“性苦闷”拓展为深广的“人间苦”,并借鉴康德、席勒的学说,使其中的文艺活动获得“性宣泄的快感”变成“自由创造的欢喜”。(三)用“象征”代替其转化方式——“改装打扮”,又借立普斯的“移情说”作为获得自由心境的保障,并把创造的欢喜扩延到鉴赏领域,认为鉴赏是一种创造性活动,从而实现了对西方文化思潮的创造性整合。     

虚光子过程对级联三能级原子粒子布居相干捕获的影响

研究了双模光场与级联三能级原子相互作用过程中原子粒子布居相干捕获条件 ,讨论了虚光子过程对粒子布居相干捕获的影响 ,这种影响导致了系统的量子噪声