慢化

Methods A moderated BF3 proportional neutron counter was used for measurement of neutron dose of cosmic radiation in cabin of B-747 flying from Beijing to New York and Beijing-Stockholm-Beijing.

采用慢化BF3中子监测器，在北京―纽约和北京―斯德哥尔摩航线飞行的B-747飞机上进行了测量，起飞、着陆阶段每2 min测一次，巡航阶段第30 min测试一次，高度和纬度利用飞机仪表读出，地磁纬度采用人造地球卫星环境手册的公式计算。

Based on the classical NS model, the randomization parameter of a vehicle was calculated according to fuzzy control rules.

与NaSch模型不同，新模型中的随机慢化概率是根据模糊控制规则计算得来的。

By computing the spatial correlation function, the evolution plots of velocity, the relaxation time and the order parameter, the effect of top-priority of randomization on traffic flow is studied.

通过位置相关函数、速度时空演化图、驰豫时间和序参量的计算，研究优先随机慢化对交通流的影响。

The scaling relations and the scaling exponents of the relaxation time and order parameter are obtained, which are different from original NaSch model. The top-priority of randomization will lead to synchronized traffic flow and there is criticality in traffic phase transition.

计算结果得到了驰豫时间和序参量的标度关系和标度指数，结果发现与原始交通流NaSch模型不同，优先随机慢化将引起交通同步流，交通相变具有临界性，其标度指数属于确定NaSch模型类。

Theoretical analysis and experimental results reveal that the metastable character is relevant with the relation degree between cars and the random slow probability.

通过对模型的理论分析和仿真研究，揭示了亚稳定状态的产生与前车的关联程度以及随机慢化概率的大小都有一定的关系。

Methods The clinical manifestations and the plasma ammonia levels were analyzed in l7 patients with HE , who underwent EEG , CT and MRI examinations Results Fifteen patients had abnormal EEG findings characterized by lowered basic rhythm, moderate to high amplitude θ wave activity, and sporadic δ wave and triphasic wave Fourteen patients had abnormal MRI findings , including increased signal in the bilateral globus pallidus (14/17), putmen (4/17) and tegmentum of the midbrain (7/17) in T1WI without corresponding alterations in the signal Intensity in T2WI T2 FLAIR demonstrated increased signal in the bilateral white matter of the cerebral hemispheres.

总结17例各种原因引起的肝性脑病患者的临床表现、血氨水平，对全部病例进行EEG、颅脑CT、MRI检查。结果 17例肝性脑病患者EEG异常15例，主要表现为：基本节律慢化；中波～高波幅θ活动；散在的δ波、三相波。

The slowing down effect of alpha particles during thermonuclear burn has been studied.

研究了α粒子的能量在等离子体中沉积的时空分布，对α粒子本身在等离子体中的慢化行为有了一个细致的了解。

The results gained from MACONP are indentical with that of RETRAN02/MOD2 program. Then, Incontrollable Control Rod Withdrawal ATWS , Loss Of Offsite Power ATWS , Turbine Trip ATWS and Loss Of Feedwater ATWS are analyzed emphatically. Based on the LOFW-ATWS analysis, the sensitivity analyses of the influence of some conditions on ATWS process are conducted, such as pressurizer relief valve blocking, putting pressurizer spray in, no turbine trip and decrease of moderator reactivity coefficient. The simulating results agree well with corresponding results of RELAP5/MOD2, both analyses consequences are consistent in the main.

本论文首先应用MACONP程序分析了秦山核电站的汽轮机保护停车瞬态，包括&压力有控制&和&压力无控制&两种情况，所得结果与RETRAN02/MOD2的计算结果吻合；然后着重分析了该电站的控制棒失控提升ATWS、失去厂外交流电源ATWS、汽轮机保护停车ATWS和失去主给水ATWS，并在LOFW-ATWS分析的基础上就稳压器释放阀卡死、稳压器喷淋投入、汽轮机不脱扣和慢化剂反应性系数减小等对ATWS进程的影响作了敏感性分析，仿真结果与RELAP5/MOD2的仿真结果符合良好，对结果进行分析所得到的分析结论也基本一致。

This is accomplished by means of neutron absorbers or moderators.

这可使用中子吸收剂或慢化剂来达到。

Employing a general Monte Carlo code MCNP, the following Monte Carlo calculations which are important in the design of PAN shufflers were done:(1) optimization of moderators;(2) detection efficiency variation with the position of a neutron source;(3) multiplication effects and self-shielding effects;(4) isotopic effects;(5) shielding properties of the storage chamber and the assay chamber;(6) the relation between 〓Cf source strength and background neutron count rates.

文章详细讨论了无源方式下中子总计数分析和符合计数分析以及有源方式下缓发中子分析的基本原理，在此基础上，运用通用蒙特卡罗程序MCNP计算了桶装废物分类装置研制过程中所关心的一系列问题：慢化体的优化设计、探测效率随中子源位置的变化情况、增殖和自屏蔽效应、同位素效应、贮存室和测量室对〓Cf源的屏蔽能力、〓Cf源强度与本底计数率的关系，等。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。