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CoRoT\,102699796, the first metal-poor Herbig Ae pulsator: a hybrid $δ$ Sct-$γ$ Dor variable?
stars: pre-main-sequence – stars: variables: T Tauri, Herbig Ae/Be variables: Scuti stars: fundamental parameters stars: abundances infrared:stars.
2011/9/9
We present the analysis of the time series observations of CoRoT102699796 obtained by the CoRoT satellite that show the presence of five independent oscilla-
tion frequencies in the range 3.6-5 c/d. ...
Crossover from negative to positive shear rate dependence in granular friction
Crossove granular friction
2011/9/9
We conduct an experiment on the frictional properties of granular matter over a wide range of shear rate that covers both the quasistatic and the inertial regimes. We show that the friction coefficien...
Spherical harmonic transform on heterogeneous architectures using hybrid programming
Spherical Harmonic Transforms, hybrid architectures, hybrid programming, OpenMP,CUDA, Multi-GPU
2011/9/9
Spherical Harmonic Transforms (SHT) are at the heart of many scientific and practical applications ranging from climate modeling to cosmological observations. In many of these areas a new wave of exci...
Pulling and Pushing a Cargo With a Catalytically Active Carrier
Pulling and Pushing Cargo Catalytically Active Carrier
2011/9/9
Catalytically active particles suspended in a liquid can move due to self-phoresis by generating solute gradients via chemical reactions of the solvent occurring at parts of their surface. Such partic...
Harmonic analysis of spherical sampling in diffusion MRI
Harmonic analysis spherical sampling diffusion MRI
2011/9/9
In the last decade diffusion MRI has become a powerful tool to non-invasively study white-matter integrity in the brain. Recently many research groups have focused their attention on multi-shell spher...
利用两束同色激光场与中红外场形成的组合场驱动氦原子产生单个阿秒脉冲
两束同色激光场 中红外场 高次谐波 阿秒脉冲
2013/8/29
提出了使用两束同色激光场与中红外场形成的组合场驱动一维氦原子产生单个阿秒脉冲的方法. 通过数值模拟研究了氦原子在组合场驱动下发射高次谐波的特点, 谐波谱的截止位置可以拓展到Ip+12.6Up, 对第二平台区域不同范围内高次谐波叠加均能得到单个阿秒脉冲, 最短脉宽达42 as, 尤其是对平台区域的前端进行叠加, 不仅可以得到单个阿秒脉冲,而且与截止位置附近高次谐波构造的阿秒脉冲相比, 强度提高了3 ...
假分数阶Chen混沌系统同步
假分数阶 稳定性 混沌 同步
2013/12/5
提出真分数阶系统和假分数阶系统的概念以及对分数阶系统分段研究的思想，建立假分数阶系统稳定性理论.研究分数阶系统中阶次大于1（假分数阶）的分数阶系统同步问题，并设计控制器实现假分数阶Chen混沌系统的同步.仿真结果证实该理论的正确性.
根据广义乌龟坐标变换法(GTCT),对动态Kerr-Newman-de sitter黑洞的热辐射机制进行了研究.首先,利用在弯曲时空中描述自旋为0,质量为m的标量粒子的动力学方程(Klein-Gordon方程),再通过2种不同广义Tortoise坐标变换,最终得到了动态Kerr-Newman-de sitter黑洞在这2种不同情况下的热辐射谱,以及各自在事件视界处的霍金温度.通过对比研究发现,在2...
On Semigroup of Permutation Factor Circulant Boolean Matrices
Boolean algebra permutation factor circulant Boolean matrix semigroups idempotent Euler-Ferment theorem
2012/9/25
Let ()nPM B denote the set of all nn× permutation factor circulant matrices over the Boolean algebra {0, 1} B = , then ()nPM B forms a semigroup under the usual matrix product. In this paper,...
ECF Bleaching with Molybdenum Activated Acid Peroxide and its Impact on Eucalyptus Pulp Properties and Effluent Quality
Molybdenum Bleaching Eucalyptus Kraft Qulp Effluent Pulp Quality
2013/3/8
Acid hydrogen peroxide catalyzed with molybdenum (PMo stage) is effective to decrease pulp kappa number and potentially minimize chlorine dioxide demand in subsequent ECF bleaching. This study aimed a...
运用准经典轨线法结合Peterson 从头计算势能面, 在碰撞能为0.22 eV 时对O(1D) +DBr(v=0, j=0) → OD+Br 反应进行了细致的立体动力学性质研究. 极化微分反应截面(PDDCSs)给出了反应产物的散射方向. 反映k 与j′ 两矢量相关的函数P(θr)的分布表明产物分子的转动角动量j′在垂直于反应物相对速度矢量k 的方向上有强烈的取向分布; 反映k, k′与j′三矢...
非Jaky粮仓的弹性应力分析和侧壁边界条件
颗粒物质 粮仓 转向比 Jaky公式
2013/8/27
为了理解一些粮仓实验报道中转向比明显大于工程规范中Jaky 公式估算值的现象, 计算了平面粮仓应力饱和区域的非线性弹性通解. 结果表明, 这个通解的确可以给出实验观测到的大转向比应力, 但同时也偏离Janssen 假设. 由于边界条件会因塑性而失去完备性, 粮仓转向比将允许在一定范围内取值, 不一定总是满足Jaky 公式. 这意味着, 弹性理论能够描述与制备历史有关的颗粒物质静力学问题.
表面增强光谱和表面等离激元共振传感器
表面等离激元 表面增强拉曼光谱 表面增强荧光
2013/8/28
表面等离激元光子学是研究光和金属表面自由电子耦合所引起金属表面电荷密度振荡的性质及其应用的一门学科. 金属中的自由电子在入射光的作用下产生集体振荡. 在垂直表面的方向上强度呈指数衰减, 使得亚波长金属结构中光场高度局域. 由于独特的光学性质, 使得其具有广泛的应用, 其中两个重要的分支为: 表面增强光谱和表面等离激元共振传感器. 表面增强光谱传感器是利用纳米结构的巨大表面增强效应来直接探测表面分子...