A new measure to characterize multifractality of sleep electroencephalogram

Traditional methods for nonlinear dy-namic analysis,such as correlation dimension,Lyapunov exponent,approximate entropy,detrended fluctuation analysis,using a single parameter,cannot fully describe the extremely sophisticated behavior of electroencephalogram (EEG). The multifractal for-malism reveals more “hidden” information of EEG by using singularity spectrum to characterize its nonlin-ear dynamics. In this paper,the zero-crossing time intervals of sleep EEG were studied using multifractal analysis. A new multifractal measure Δasα was pro-posed to describe the asymmetry of singularity spec-trum,and compared with the singularity strength range Δα that was normally used as a degree indi-cator of multifractality. One-way analysis of variance and multiple comparison tests showed that the new measure we proposed gave better discrimination of sleep stages,especially in the discrimination be-tween sleep and awake,and between sleep stages 3 and 4.     

对创意产业发展的观察与思考（一）

介绍了世界创意产业发展的现状和趋势,分析了国内创意产业发展的现状和特点,提出了太原发展创意产业的路径选择,以及实施层面的对策和建议。     

Studies on monitoring hemodynamics and oxygen dynamics of adult respiratory distress syndrome secondary to high altitude pulmonary edema

To studies on monitoring hemodynamics and oxygen dynamics of adult respiratory distress syndrome(ARDS) secondary to high altitude pulmonary edema (HAPE), we performed a clinical and laboratory studies in eight patients who preliminary developed HACE then secondly occurred ARDS at an altitude of 4 500 m. After an initial emergency treatment on high mountains, all the patients were rapidly transported to a Hospital at a lower altitude of 2 808 m. The right cardiac catheterizations were carried out within 5 hours after hospitalized. The monitoring hemodynamics and oxygen dynamics were via a thermodilution Swan-Gaze catheter. The results showed that before treatments at the beginning of monitoring, there was presented a significant pulmonary artery hypertension with a decreased cardiac function, and a lower oxygen metabolisms in all the 8 patients. However, after an effective treatments includes mechanical ventilation, used dexamethasone, furosemide, etc. a repeated monitoring four days latter showed that the pulmonary artery pressure has been decreased with an improved cardiac function as well as all the oxygen metabolic indexes increased significantly. Our studies suggest that performed monitoring hemodynamics in patients with ARDS secondary to HAPE will clear and definite the clinical therapeutic measurements which will benefit the outcome.     

Using local geopotential model to implement underwater passive navigation

A main aspect of underwater passive navigation is how to identify the vehicle location on an existing gravity map, and several matching algorithms as ICCP and SITAN are the most prevalent methods that many scholars are using. In this paper, a novel algorithm that is different from matching algorithms for passive navigation is developed. The algorithm implements underwater passive navigation by directly estimating the inertial errors through Kalman filter algorithm, and the key part of this implementation is a Fourier series based local geopotential model. Firstly, the principle of local geopotential model based on Fourier series is introduced in this paper, thus the discrete gravity anomalies data can be expressed analytically with respect to geographic coordinates to establish the observation equation required in the application of Kalman filter. Whereafter, the indicated gravity anomalies can be gotten by substituting the inertial positions to existing gravity anomalies map. Finally, the classical extended Kalman filter is introduced with the differences between measured gravity and indicated gravity used as observations to optimally estimate the errors of Inertial Navigation System (INS). This navigation algorithm is tested on simulated data with encouraging results. Although this algorithm is developed for underwater navigation using gravity data, it is equally applicable to other domains, for example vehicle navigation on magnetic or terrain data.     

低红移活动星系核中大质量黑洞与核球质量关系研究

采用活动星系核图像的核球/盘分解数据得到核球R波段光度值,计算了一个X射线活动星系核样本的中心大质量黑洞质量与核球质量之比(Mbh/Mbulge),其中包括15个窄线塞弗特1星系(NLS1 s)和18个宽线塞弗特1星系(BLS1 s).我们发现log(Mbh/Mbulge)的平均值,对15个窄线塞弗特1星系为:-3.81±0.11;而对18个宽线塞弗特1星系,则为:-2.91±0.13.这表明:窄线塞弗特1星系相对于宽线塞弗特1星系而言有较低的Mbh/Mbulge.     

适于IP设计的定点DSP软件开发系统

描述了一种本实验室开发的适合于IP(IntellectualProperty)设计的DSP(DigitalSignalProcess)处理器核WDSP(以主要开发者姓Wu命名Wu′sDSP)的软件开发系统。这一开发系统将使根据不同DSP应用产生不同DSP处理器核成为可能。此外,WDSP还将作为一个核心部件应用于本实验室正在开发的称为FDP(FPGAforDataPath)的FPGA(FieldProgrammableGateArrays)系统中,以适应当前普遍采用的IP和SoC(SystemonChip)设计方法。     

基于神经网络的容错控制在CSTR对象中的应用

将扩展卡尔曼滤波用于RBF网络的权值更新,使该网络能满足动态建模的要求,不仅很好地逼近正常工况下的对象,也能及时有效地重构故障工况模型。基于Lyapunov稳定性推导得到的PID参数自整定算法,保证了基于RBF网络的PID控制算法使跟踪误差收敛。在CSTR系统中,仿真实例说明该方法用于对象元部件故障的检测是有效的。     

氧化物组成对地聚物再生骨料混凝土尺寸效应的影响

为了研究地聚物再生骨料混凝土的尺寸效应,设计了边长分别为70、100、150和200 mm的地聚物再生骨料混凝土立方体试块,研究不同氧化物摩尔比条件下抗压强度的尺寸效应。结果表明:地聚物再生骨料混凝土的尺寸换算系数不能采用现行国家标准《普通混凝土力学性能试验方法标准》(GB/T 50081—2002)中规定的系数,采用线性拟合的方法给出了尺寸换算系数与氧化物摩尔比的关系;通过对尺寸效应的研究,发现边长为200、150和100 mm的地聚物再生骨料混凝土立方体试块抗压强度均符合Bazant尺寸效应理论,采用无量纲的方法得到抗压强度与氧化物摩尔比和尺寸参数耦合作用的预测方程,得出了不同氧化物摩尔比下的临界尺寸和临界强度值。通过研究发现,地聚物再生骨料混凝土相比于普通水泥混凝土的尺寸效应更加明显,在实际工程中应更多地考虑其对整个结构稳定性的影响。     

蠕虫病毒分析研究

介绍了蠕虫病毒的基本知识,并分析了蠕虫病毒的自动入侵原理,扫描方法,攻击原理。详细介绍了阻止蠕虫侵入系统的方法,如何实现针对蠕虫的入侵检测系统。     

数据对最佳线性无偏估计的影响问题

本文从预测角度讨论剔除数据对最佳线性无偏估计的影响,得到了一些有意义的结果。