Observation of the Two-Dimensional Distribution of Impurity Line Emissions Using a Space-Resolved EUV Spectrometer in LHD

A space-resolved EUV spectrometer for measuring the one-dimensional distribution of impurity line emissions in Large Helical Device （LHD） has been upgraded to measure two- dimensional distributions of impurity line emissions with an extension of working wavelength range to 30-650% The two-dimensional measurement is performed by scanning the observation chord horizontally. A rectangular plasma region of 520 × 700 mm2 in vertical and horizontal sizes can be observed during a single horizontal scan. The horizontal scan requires a time duration of 5 s at least. The spatial resolution is 10 mm in the vertical direction when a spatial-resolution slit of 0.2 mm in width is adopted. Although a spatial resolution in the toroidal direction is 75 mm, it is a function of CCD exposure time and horizontal scanning speed. Two-dimensional distribution of EUV line emissions from several impurities has been successfully observed for the first time from steady discharges in LHD. In this paper two-dimensional distributions of He II （303.78A）, C V （40.27A）, C VI （33.73A） and Fe XX （132.85A） located at different radial positions are presented with simple analysis on the magnetic field structure of LHD.

Analysis of Resistance-related Proteins in Rice Against Brown Planthopper by Two-dimensional Electrophoresis

A recombinant inbred population (RI) was constructed from a cross between B5, an introgression. line from the wild rice Oryza officinalis Wall. ex Watt, and susceptible cultivar Minghui 63 ( O. sativa L.). The brown planthopper ( BPH) resistances of RI lines were evaluated. Based on bulked segregant analysis (BSA), two protein bulks were made by extracting proteins from equally mixed seedlings of extremely resistant and susceptible plants selected from the RI population, respectively. Two-dimensional electrophoresis was used to detect the changes of polypeptide pattern. Results showed that a protein P40 ( pI 6.3, Mw 40 kD) was significantly reduced or vanished after BPH infestation for 48 h in the susceptible bulk, while it remained uninfluenced in the resistant bulk. In connection with the physiological changes of the resistant and susceptible lines subjected to BPH sucking, we suppose that the protein P40 is related to the interaction responses of lice plants to BPH infestation.

A New Proposal to Adjust a Straight Line to a Normal Q-Q Plot

In this paper a new proposal of a straight line, the ＂modified Tukey＇s line＂, for fitting to a normal quantile-quantile Plot, or normal Q-Q plot, is presented. This probability plot allows us to determine whether a set of sample observations is distributed according to a normal distribution. For this, the sample quantiles are represented against the quantiles of a theoretical probability model, which in this case is the normal distribution. If the data set follows the above mentioned distribution, the plotted points will have a rectilinear configuration. To verify this, there are different alternatives for fitting a straight line to the plotted points. Among the straight lines which can be fitted to a Q-Q plot, in this paper, besides the proposed straight line, the following straight lines are considered： straight line that passes through the first and third quartiles, straight line that passes through the 10th and 90th percentiles, straight line fitted by the method of least squares, straight line with slope s and constant the average of the data set, Theil＇s line and Tukey＇s line. In addition, an example, in which there are represented the different straight lines considered and the proposed straight line on a normal Q-Q plot obtained for the same set of observations, is developed. In this example the existing differences among the straight lines are observed.

A class of two-dimensional rational maps with self-excited and hidden attractors

This paper studies a new class of two-dimensional rational maps exhibiting self-excited and hidden attractors. The mathematical model of these maps is firstly formulated by introducing a rational term. The analysis of existence and stability of the fixed points in these maps suggests that there are four types of fixed points, i.e., no fixed point, one single fixed point, two fixed points and a line of fixed points. To investigate the complex dynamics of these rational maps with different types of fixed points, numerical analysis tools, such as time histories, phase portraits, basins of attraction, Lyapunov exponent spectrum, Lyapunov(Kaplan–Yorke) dimension and bifurcation diagrams, are employed. Our extensive numerical simulations identify both self-excited and hidden attractors, which were rarely reported in the literature. Therefore, the multi-stability of these maps, especially the hidden one, is further explored in the present work.

On some classes of two-dimensional local models in discrete two-dimensional monatomic FPU lattice with cubic and quartic potential

This paper discusses the two-dimensional discrete monatomic Fermi- Pasta-Ulam lattice, by using the method of multiple-scale and the quasi-discreteness approach. By taking into account the interaction between the atoms in the lattice and their nearest neighbours, it obtains some classes of two-dimensional local models as follows： two-dimensional bright and dark discrete soliton trains, two-dimensional bright and dark line discrete breathers, and two-dimensional bright and dark discrete breather.

Influence of the Fitted Straight Line for Confidence Bands Algorithm in Q-Q Plots

Confidence bands in a Normal Q-Q Plot allow us to detect non-normality of a data set rigorously, and in such a way that the conclusion does not depend on the subjectivity of the observer of the graph. In the construction of the graph, it is usual to fit a straight line to the plotted points, which serves both to check the hypothesis of normality (linear configuration of the plotted points) and to produce estimates of the parameters of the distribution. We can opt for dif-ferent types of lines. In this paper, we study the influence of five types of fitted straight lines in a Normal Q-Q Plot used for construction the confidence bands based on the exact distribution of the order statistics.

Fabrication of honeycomb AuTe monolayer with Dirac nodal line fermions

Two-dimensional honeycomb lattices show great potential in the realization of Dirac nodal line fermions(DNLFs).Here,we successfully synthesized a gold telluride(AuTe)monolayer by direct tellurizing an Au(111)substrate.Low energy electron diffraction measurements reveal that it is(2×2)AuTe layer stacked onto(3×3)Au(111)substrate.Moreover,scanning tunneling microscopy images show that the AuTe layer has a honeycomb structure.Scanning transmission electron microscopy reveals that it is a single-atom layer.In addition,first-principles calculations demonstrate that the honeycomb AuTe monolayer exhibits Dirac nodal line features protected by mirror symmetry,which is validated by angle-resolved photoemission spectra.Our results establish that monolayer AuTe can be a good candidate to investigate 2D DNLFs and provides opportunities to realize high-speed low-dissipation devices.

基于神经网络模型胶凝砂砾石渗透性能研究

以胶凝砂砾石(CSG)为例,通过119组试验试块进行渗透试验测定,形成了CSG的28天渗透系数的数据集。数据集中有119组渗透系数数据,其中最小值为3.41×10^(-5)cm/s,最大值为27.812×10^(-5)cm/s。数据主要集中在3×10^(-5)~22×10^(-5)cm/s范围内,约占总样本数的97%。根据箱线图确定去除异常值并通过偏态峰度检验、K-S检验和分布图结果,可认为CSG材料的渗透系数数据服从正态分布规律。在此基础上,使用BP和GABP神经网络模型进行渗透系数预测,并对两种模型的预测精度进行比较。结果表明,GABP估计模型的精度略优于BP模型。CSG渗透系数实际值与预测值吻合较好,说明预测效果较好。

Protein Profile of Human Lung Squamous Carcinoma Cell Line NCI-H226

Objective To construct a database of human lung squamous carcinoma cell line NCI-H226 and to facilitate discovery of novel subtypes markers of lung cancer. Method Proteomic technique was used to analyze human lung squamous carcinoma cell line NCI-H226. The proteins of the NCI-H226 cells were separated by two-dimensional gel electrophoresis and identified by mass spectrometry. Results The results showed that a good reproducibility of the 2-D gel pattern was attained. The position deviation of matched spots among three 2-D gels was 1.95±0.53 mm in the isoelectric focusing direction, and 1.73±0.45 mm in the sodium dodecyl sulfate-polyacrylamide gel electrophoresis direction. One hundred and twenty-seven proteins, including enzymes, signal transduction proteins, structure proteins, transport proteins, etc. were characterized, of which, 29 identified proteins in NCI-H226 cells were reported for the first time to be involved in lung cancer carcinogenesis. Conclusion The information obtained from this study could provide some valuable clues for further study on the carcinogenetic mechanism of different types of lung cancer, and may help us to discover some potential subtype-specific biomarkers of lung cancer.

Plot Analysis of The Importance of Being Ernest

Throughout Oscar Wilde’s farcical comedy,The Importance of Being Ernest,there are two story lines.The lines are both independent to each other,but are connected with each other.With the author’s thoughtful arrangement and distinctive technology,the two lines push the development of plot;intensify the depth of conflict and make the structure complete.It seems the author told us a story,but indeed it gives us a lot of inspiration and education.

Lorenz散点图矢量角联合B线斜率在心律失常中的诊断价值

目的探讨Lorenz散点图(LPs)矢量角的价值,及其联合B线斜率在提高心律失常诊断效能方面的作用。方法回顾性分析119例室性期前收缩(室早组)、97例室上性期前收缩(室上早组)、52例二度Ⅰ型房室传导阻滞(二度Ⅰ型组)和54例二度Ⅱ型房室/窦房传导阻滞(二度Ⅱ型组)患者的LPs,测量B线斜率及矢量角,比较各组间的差异。采用受试者工作特征曲线分析B线斜率、矢量角及两者联合在组间的诊断效能并使用MedCalc软件进行统计学比较。使用组内相关系数(ICC)、Bland-Altman图评估B线斜率、矢量角的观察者内和观察者间测量的一致性。结果室早组与室上早组、二度Ⅰ型组与二度Ⅱ型组间比较差异均有统计学意义(P<0.05)。B线斜率、矢量角以及两者联合鉴别室性与室上性期前收缩的曲线下面积(AUC)分别为0.81、0.84、0.87,鉴别二度Ⅰ型与二度Ⅱ型房室/窦房传导阻滞的AUC分别为0.76、0.78、0.80。矢量角的ICC优于B线斜率(观察者内0.99 vs 0.98、观察者间0.97 vs 0.96)。结论矢量角可用于鉴别心律失常类型,且具有较好的观察者内及观察者间一致性。其联合B线斜率诊断心律失常具有较高准确率,为临床诊疗提供了新的参考依据。

常用投影大地线的高效展绘及Mathematica实现

针对大地线方程的复杂性及高效展绘难以实现的问题,以第三扁率n改化大地问题正反解的计算公式,根据法截线方位角与大地方位角的数学关系提高大地方位角计算精度,并提出了等间距内插的大地线展绘方法;利用Mathematica建立了精度自适应控制模型,提高了等间距内插的效率和精度;利用Mathematica强大的绘图功能实现了不同距离和应用场景下不同地图投影的大地线展绘,挖掘了大地线展绘的应用价值。实验结果表明:该方法在精度可控的条件下能实现对任意长度大地线的高效率展绘,不同地图投影的大地线展绘在不同的应用场景下具有独特的意义。

THE IMPLICIT METHOD OF STREAMLINE ITERATION FOR COMPUTING TWO-DIMENSIONAL VISCOUS INCOMPRESSIBLE FLOW

This paper presents the implicit method of streamline iteration on the bases of the method of streamline itera- tion for computing two-dimensional viscous incompressible steady flow in a channel with arbitrary shape. A new total pressure equation of viscous incompressible flow is introduced in this paper and the equation is numerically computed by the implicit method. It is shown from the computational results of examples that the implicit method of streamline iteration can speed up the convergence and decrease the computational time.

松辽盆地北部深反射地震X^2分布处理及其深部地质特征

人们在利用深反射地震资料进行深部地质解释过程中所面临的主要困难之一是在高噪声背景下识别地震反射的相干同相轴,以便确定地下反射结构的模式。常用的解决办法是制作线条图,目的是简化地震反射、突出地下反射结构。在总结20多年来深反射地震技术发展的基础上,本文提出并实现了深反射地震资料的X2分布处理技术。该方法根据深反射地震技术的特点,从反射结构与能量的角度,突出深部构造。认为经X2分布处理得到的深反射构造线条图剖面能够清晰地反映现今的地下构造格架,而构造与能量叠合剖面,强弱显示分明,其中较弱的反射表示老的或幅度不大的构造运动留下的痕迹,较强的反射表示新的或幅度较大的构造运动留下的痕迹。从岩石物性的角度来讲,强弱分明的深反射剖面体现了不同岩性的接触关系与划分边界,如拉张下地壳的强反射表示韧性剪切带等。研究结果表明,松辽岩石圈呈现典型的大陆裂谷特征:超过20km厚的显生宙地层,上隆而且破碎的莫霍面,以及由拉张和间歇性挤压造成的断裂体系等。初步认为该区上中地壳存在巨厚前中生代及古生代地层,并伴有多组穿过地壳的断裂系统,具有较好的深部油气运移及储藏前景。

等距离正圆柱投影世界挂图上大圆航线的绘制

针对世界挂图上全球任意两点间大圆航线绘制存在的问题,通过总结当前几种常用于大圆航线绘制的世界挂图投影存在的不足,提出采用等距离正圆柱投影作为世界挂图投影并分析其适用性。从大圆航线在等距离正圆柱投影中的方程及其曲率入手,按照计算机制图中"以直代曲"的研究思路,给出了一种在等距离正圆柱投影世界挂图上绘制大圆航线的方法,最后以我国南极科考航线所需参考的大圆航线绘制实例验证了该方法的可行性与实用性。

边界层风廓线仪多普勒频谱高度图综合应用初探

文章介绍了边界层风廓线仪多普勒频谱高度图的原理,并且给出了无降水、有降水、降雪、速度折叠、地物杂波、外界信号干扰等典型的多普勒频谱高度图型。研究发现,多普勒频谱高度图除了可以从中提取测风产品所需的数据外,该在线显示的图形还实时提供了许多其他潜在的气象信息,并可用于:连续监视测站上空天气;提前了解测站上空风的垂直切变;发现并确定降水起始时间;在线估测风向风速;实时判别降水云底高度和0°层的范围;验证和解释风羽剖面图产品中的奇异现象;帮助固定和移动风廓线仪选址;诊断风廓线仪系统故障;评价风廓线仪系统软/硬件性能优劣等。文章指出:深入发掘边界层风廓线仪在降水天气系统中进行高时间密度探测的潜力,使得它可以晴雨两用,对今后将边界层风廓线仪配备到一般气象观测站,提高单站天气监测/预警能力和开展精细化天气预报意义深远。文章还对当前商业化的边界层风廓线仪提出了具体的改进意见,以满足频谱在线分析的需要。

RR-Lorenz心电散点图回顾分析窦性心律伴长RR间期的研究

目的:探讨RR-Lorenz心电散点图(RR-LP)分析窦性心律伴长RR间期的优越性。方法:根据动态心电图结果选择窦性心律伴长RR间期患者308例,按造成长RR间期的机制不同分为:窦性心动过缓伴不齐63例(窦性心动过缓伴不齐组),反复发作的一过性窦性停搏16例(一过性窦性停搏组),反复发作的一过性二度Ⅱ型窦房阻滞14例(一过性二度Ⅱ型窦房阻滞组),反复发作的一过性二度房室阻滞47例(一过性二度房室阻滞组),反复发作的一过性房性早搏未下传28例(一过性房性早搏未下传组),房性早搏72例(房性早搏组),室性早搏68例(室性早搏组)。对308例患者动态心电图显示窦性心律伴RR间期大于1500 ms的RR-LP进行回顾性分析。结果:①窦性心动过缓伴不齐组RR-LP显示横、纵轴以1500 ms为原点形成特定的一分布区域图形,B线斜率1(45°)。②反复发生的一过性窦性停搏组、一过性二度Ⅱ型窦房阻滞组、一过性二度房室阻滞组、一过性房性早搏未下传组呈特殊的三分布区域;B线斜率、倾斜角分别为0.51±0.01、(23.04±0.50)°;0.6、27°;0.57±0.21、(25.69±9.59)°;0.50±0.01、(22.59±0.54)°。③早搏显示特殊四分布区域;房性早搏B线斜率0.38±0.12,倾斜角(17.06±5.22)°;室性早搏B线斜率0.07±0.05,倾斜角(3.02±2.39)°。结论:窦性心律伴不同机制形成的长RR间期RR-LP有特定的形态和分布特征,其在一个平面通过全部RR间期发现局部异常,为动态心电图反复发生短程长RR间期提供了一种辅助鉴别诊断方法。

列流线偏移描绘自动化

基于图论理论分析了列流图的组成特性,以解决列流线折点自动搜索问题.提出列流线折点搜索算法和列流线偏移描绘算法.采用基于节点信息表绘制列流图.开发了列流图自动生成数据库系统.用实例表明了算法及软件有效性和可行性.

中国东北地区气象数据的空间平稳性检验$

现有的空间统计模型多是以随机场平稳为前提条件来建立的,然而在现实中这个前提条件未必成立.因此在统计建模前,需要检验数据在空间上的平稳性.针对中国东北地区的气象数据(日气温、日风速和月降水),设计了散点图法、趋势线法和邻域圆法的空间数据平稳性检验算法.结果显示日气温值有南高北低的趋势,月降水值有东高西低,南高北低的趋势,日风速值在空间上平稳.实验分析结果较好地反映了东北地区气象变化规律,说明了所设计的空间数据平稳性检验方法的有效性.

单线区间列车最优运行次序的排序模型及解法

讨论在一个单线区间上以一个车站接续最好为目标的列车最优运行次序问题,首先提出了与该问题相关的一个较特殊的单机反顺序排序问题;应用网络理论,推导出该排序问题的一系列消去准则,并通过对网络适当增弧和加权的方法,给出了当部分工件加工次序已确定的条件下求该排序问题的一个较贴切的上界和下界的方法;利用这些消去准则和上下界估计设计了一个求该问题最优解的分枝定界法算法;最后将所给的分枝定界法推广到更一般的单机反顺序排序模型,并证明求单线区间列车最优运行次序问题是机器可加工时间区间为[t_1,t_2]的单机反顺序排序模型的一种特殊情形。