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.     

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。     

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     

小型Ka频段锁相倍频源

介绍了小型毫米波跳频频率合成器的研究方法。为了满足系统小型化要求,采用微波频段锁定后倍频到毫米波频段的锁相倍频方案,选用超小型、无任何补偿措施的普通10 MHz晶振。整个毫米波锁相源在150 cm3体积内实现。测试结果为:输出频率29～31 GHz,步进 20 MHz,相噪优于-65 dBc/Hz@10 kHz,输出功率大于10 dBm,可用于8 mm接收机作本振或发射机基准源使用。     

X波段雷达频率综合器设计与分析

讨论并介绍了一种用于动目标显示的雷达频率综合器的设计考虑。分析了相位噪声对动目标改善因子的影响。本振锁相环环路带宽的正确设计是降低相位噪声的关键。对石英晶体振荡器和压控振荡器相位嗓声的测全可以估算出环路带宽。给出了整个系统的的框图与频率综合器的相位嗓声测量结果，也给出了整个频带内的杂散指标测量结果。结果表明：相位噪声在离载波１ｋＨＺ处达—９３ｄＢｃ／Ｈｚ，带内杂散优于—５５ｄＢｃ。     

心律波动信号的1/f噪声特性分析

心律波动信号具有1/f噪声特性,是非平稳的。该文采用平均功率谱密度方法,分析了基于平均功率谱密度和最小二乘拟合法求正常人和心脏充血患者的心律波动信号的谱参数,发现根据谱参数可以定量地区分正常人与心脏充血患者:大部分正常人的心律波动信号的谱参数大于1,而大部分心脏充血患者的心律波动信号的谱参数小于1,该结论可为心脏病的诊断与预诊断提供一种辅助手段。     

时变三因子模型风险系数的动态研究

由Fama和French提出的三因子模型能够较好地解释股票的收益率风险溢价。文章以状态空间模型为框架,将风险因子系数作为状态变量,市场风险溢价作为观测变量,构建时变三因子模型来应对股票市场价格的时变特征。研究结果显示,利用卡尔曼滤波来估计时变风险因子系数,增强了估计结果的准确性与连贯性;风险因子系数变化规律与中国A股市场政策和环境影响相吻合,消除非理性噪声后的时变三因子模型更具有解释力度。     

A density function connected with a non-negative self-decomposable random variable

The innovation random variable for a non-negative self-decomposable random variable can have a compound Poisson distribution. In this case, we provide the density function for the compounded variable. When it does not have a compound Poisson representation, there is a straightforward and easily available compound Poisson approximation for which the density function of the compounded variable is also available. These results can be used in the simulation of Ornstein–Uhlenbeck type processes with given marginal distributions. Previously, simulation of such processes used the inverse of the corresponding tail Lévy measure. We show this approach corresponds to the use of an inverse cdf method of a certain distribution. With knowledge of this distribution and hence density function, the sampling procedure is open to direct sampling methods.