Lattice Boltzmann Simulation of Sedimentation of a Single Charged Elastic Dumbbell in a Newtonian Fluid

Based on the lattice Boltzmann method, the sedimentations of elastic dumbbells with different charges in a Newtonian fluid under the same and different initial conditions are simulated. Due to the polarizing effects, there are Coulomb forces exerted on the charged elastic dumbbells during their sedimentations, which change their original motions significantly. All of the numerical results show that, if the charged elastic dumbbells are released at offset-centreline positions with zero velocity and settle under gravity, they fall down vertically off the centreline and their orientations tend to be the horizontal finally, and the distances apart from the centreline increase with the increasing charges of the elastic dumbbells.     

Λ超核9Be、6Be和10Be的动力学结构

本文在α集团模型下,利用谐振子基展开和广义Talmi-Moshinsky交换,完成了对Λ超核⁹Be、⁶Be和¹⁰Be能谱的变分计算,借助统一的α-α、Λ-Λ势和修正的Λ-α势,使⁹Be、⁶Be和¹⁰Be能级得到自洽的描述.此外,对上述三个Λ超核的结构和粒子间的关联也作了研究和分析,得到一些有意义的结果.     

椭圆柱体在牛顿流体中运动的格子Boltzmann方法模拟

用格子Boltzmann方法建立了椭圆柱体的二维动力学模型，利用所建立的模型，数值模拟了 牛顿流体中不同形状的椭圆柱体在相同初始条件下的运动和同一椭圆柱体在不同初始条件下 的运动，并通过比较相同条件下圆柱体的运动，讨论了椭圆柱体二维运动的特征，得到了一 些有意义的结果. 关键词： 格子Boltzmann方法 椭圆柱体 牛顿流体     

双车道多速车辆混合交通流元胞自动机模型的研究

把NaSch模型的刹车概率分开为独立的加速和减速概率，引入转道规则，建立了双车道多速车辆的混合交通流模型.通过计算机数值模拟，得出了不同参数下混合交通的速度和流量与 密度关系的基本图.结果表明，转道概率、混合比例和加减速概率对混合交通都有重要的影 响，慢车的特性对混合交通起着决定性的作用. 关键词： 元胞自动机 混合交通流 NaSch模型     

交通灯控制下城市主干道双车道多速元胞自动机交通流模型研究

提出一个城市主干道双车道多速元胞自动机交通流模型，此模型采用开放性 边界条件，在考虑诸多实际因素影响情况下，研究了主干道中车站的设置、交通灯绿信比对 车流量和车流速度的影响.计算机模拟所得到的基本图（流量 速度图）能较好地反映在交 通灯控制下城市主干道交通流真实状况. 关键词： 元胞自动机模型 交通流 主干道     

二维伊辛模型相变临界现象的元胞自动机模拟

用元胞自动机模型模拟二维伊辛模型的相变临界现象,得出了相变图和时空演化图;当不存在外场时,数值模拟得到的临界温度与理论值精确吻合。     

Lattice Boltzmann simulation of fluid flows in two-dimensional channel with complex geometries

Boundary conditions (BCs) play an essential role in lattice Boltzmann (LB) simulations. This paper investigates several most commonly applied BCs by evaluating the relative L₂-norm errors of the LB simulations for two-dimensional (2-D) Poiseuille flow. It is found that the relative L₂-norm error resulting from FHML's BC is smaller than that from other BCs as a whole. Then, based on the FHML's BC, it formulates an LB model for simulating fluid flows in 2-D channel with complex geometries. Afterwards, the flows between two inclined plates, in a pulmonary blood vessel and in a blood vessel with local expansion region, are simulated. The numerical results are in good agreement with the analytical predictions and clearly show that the model is effective. It is expected that the model can be extended to simulate some real biologic flows, such as blood flows in arteries, vessels with stenosises, aneurysms and bifurcations, etc.     

A novel lattice model integrating the cooperative deviation of density and optimal flux under V2X environment

A novel lattice hydrodynamic model is proposed by integrating the cooperative deviation of density and optimal flux under vehicle to X (V2X) environment. According to the theoretical analysis, the stability conditions and the mKdV equations affected by the cooperative deviation of traffic information are explored. And the density wave, hysteresis loop and energy consumption of the traffic flow have been investigated via numerical simulation. The results indicate that the cooperative deviation of density and optimal flux can effectively alleviate the traffic congestion. More importantly, our new consideration can reduce fuel consumption and exhaust emission under the V2X environment.     

∧超核_∧~9Be、_(∧∧)~6He和_(∧∧)~(10)Be的动力学结构

本文在α集团模型下,利用谐振子基展开和广义Talmi-Moshinsky变换,完成了对Λ超核_Λ~9Be、_(ΛΛ)~6He和_(ΛΛ)~(10)Be能谱的变分计算.借助统一的α-α、Λ-Λ势和修正的Λ-α势,使_Λ~9Bc、_(ΛΛ)~6He和_(ΛΛ)~(10)Be的能级得到自洽的描述.此外,对上述三个Λ超核的结构和粒子间的关联也作了研究和分析,得到一些有意义的结果.     

油桐尺蠖感染核型多角体病毒后血淋巴酯酶的变化

用核型多角体病毒（nuclear polybedrosis virus）感染油桐尺蠖（Buzura suppressaria）四龄初幼虫，以染病后12，24，48，72h分别对幼虫血淋巴进行酯酶同工酶（EST）电泳分析（Native-PAGE),并用薄层扫描仪检测酶带的相对含量，染病幼虫血淋巴的一部分EST含量低于同期对照组，而另一部分却高于对照组；就谱带而言，某些样品酶带在感染后出现迁移率的变化，而有些则出现新的酶带，这二种变化均表现在某一特定的酶带上，提示该酶带在病毒感染的血淋巴病理生化方面可能具有特殊意义。