查询词典 particle accelerator

In the design of the large intensifying screen, this paper conducted the analysis of the structure mechanics and the finite element method analysis on the strength and rigidity of scneen box and crank axle system, designed a new type mesh, and finished the dynamic simulation of the motion of the particle group in intensifying screen on computer.

应用碰撞理论、概率理论和混沌、分叉理论对物料运动的规律性进行了深入分析与研究。大型强化筛的设计进行了结构力学分析和筛箱、曲轴系统的强度、刚度有限元分析；设计了新型的筛网结构；应用计算机对料群在强化筛中的运动规律性进行动态模拟。

In the process of formulating T-matrix, a characteristic of axisymmetric particle is found which is the independency of azimuthal mode m.

首先给出了光散射计算中的 T 矩阵方法的推导过程，然后分析了轴对称粒子 T 矩阵的特点―方位模 m 的独立性。

OpenGL graphics technique, modeling of the ""sky dome"", MilkShape 3D creation method, principle of particle system are discussed. These techniques are used to construct sky background, fighter plane, trail and IR jamming respectively in the IR scene simulation system.

在进行红外视景图像仿真的研究工作中，文中讨论了OpenGL图形绘制技术、圆顶形天空的建模、MilkShape3D三维造型过程、粒子系统原理，用这些技术分别构建了红外视景中的天空背景、飞机目标、飞机尾焰和红外干扰弹。

When a solid particle diameter W of B, also arrived at a balanced set of high pressure areas, and

当另一个固体W的颗粒直径为B，也到达平衡盘高压区，并且

A kind of new interior ballistic model── particle trajectory model is introduced in this paper.

该文介绍了一种新型的内弹道两相流模型─颗粒轨道模型。

Furthermore, the general formula is illustrated as the weighted summation of historical position states, so as to prove that in terms of cumulative iterations, parameters of PSO have an inherent forgetting characteristic in probability, moreover the searching mechanisms of canonical PSO and Barebones particle swarm are almost the same.

通过将粒子运动的一般性描述图解为历史状态加权和的形式，进一步证明了PSO参数随迭代周期的积累，在概率意义上的遗忘特性。分析表明在经过一定周期的搜索后，标准PSO方法同Barebones粒子群方法(Barebones particle swarm， BBPS)具有近似的搜索机制。

The concentration of barite with this particle sizes should be controlled.

若要达到原有的密度，需进一步加重，形成反复加重和反复

The effect of activated barite with different particle sizes on the viscosity of high density drilling fluids was studied.

目前解决高密度钻井液流动性差的方法是从改善猫土一水胶体体系的性质人手，降低高密度钻井液猫度，以改善其流动性。

The effects of synthesis temperature on the lattice parameter,the crystallite size and the content of CO2-3 of the prepared samples,the effects of the concentration of reactants on the particle size and morphology,and the effects of the molar ratio of barium hydroxide to tetrabutyl titanate on the molar ratio of bar...

研究了合成温度对样品的晶胞参数、晶粒大小和CO32-含量的影响；反应物浓度对样品的颗粒大小和形貌的影响；氢氧化钡与钛酸四丁酯的摩尔比对样品中钡钛摩尔比的影响。

The 20S catalytic core of the 26S proteasome has the shape of a barrel made of four rings which are composed of seven differentαsubunitsα_1-α_7 at two outer rings and seven differentβsubunitsβ_1-β_7 at two inner rings at which the catalytic sites locate. Three of theβsubunits contain proteolyses sites, which are sequestered in the hollow interior of the 20S particle. Substrates enter the 20S through a narrow channel formed by theβsubunits, whose N-termini, depending on their conformation, can either obstruct or allow substrate entry and thus function as a gate. This entry channel is narrow and only permits passage of unfolded, linearized polypeptides.

哺乳动物26S蛋白酶体是由一个20S催化颗粒(catalytic particle，CP)和两个19S调节颗粒(regulatory particle，RP)组成的ATP(adenosine-triphosphate，ATP)依赖性蛋白水解酶复合体。20S CP是26S蛋白酶体的催化核心，它是由4个圆环堆叠形成的桶状复合物，其中两侧外环每个环是由α_1-α_7亚基组成，两个内环每个环是由β_1-β_7亚基组成，4个环的中央形成一个狭窄的内腔。2个β内环形成了20S CP的催化中心空腔，其内壁为催化活性位点所在地；外侧α环中心的孔道是底物到达催化中心空腔的通道，一般被α亚基上的N末端所封闭，阻止胞内非目的靶蛋白进入20S CP内被降解破坏。

Diabetes is a social disease that affects several million people worldwide.

糖尿病是一个社会性疾病，全世界有数百万人罹患此病。

I'll call you on Friday to see if we can reschedule our luncheon meeting at your convenience.

我星期五会给您打电话在您方便的时候我们重新安排我们的午餐约会。