Numerical Simulation of Explosive Dust Detonation with CE/SE Method

采用CE/SE方法数值模拟悬浮在空气中的RDX炸药粉尘的两相爆轰过程.炸药颗粒在爆轰波阵面后的高温高速气流中加速并升温,释放能量支持爆轰波传播.数值模拟爆轰波管中的粉尘爆轰,得到爆轰波流场中的物理量分布,确定爆轰参数,数值结果与文献符合较好.数值模拟复杂通道中的炸药粉尘爆轰,预测了爆轰波的发展和传播过程以及爆轰波后的流场演化.数值结果表明CE/SE方法能成功模拟气体-固体两相爆轰,为粉尘爆轰的研究提供了新的数值预测手段.     

Achieving the nitrite pathway using FA inhibition and process control in UASB-SBR system removing nitrogen from landfill leachate

An up-flow sludge blanket(UASB) and sequencing batch reactor(SBR) system was introduced to remove organics and nitrogen from landfill leachate.The synergetic effect of free ammonia(FA) inhibition and process control was used to achieve the nitrite pathway in the SBR.In previous research,inhibition of FA on nitrite oxidizing bacteria(NOB) activity has been revealed and the process control parameters(DO,ORP and pH) exactly indicate the end-point of nitritation.The method was implemented in the SBR achieving s...     

Fluctuation theorem for entropy production in a chemical reaction channel

Fluctuation theorem for entropy production in a mesoscopic chemical reaction network is discussed. When the system size is sufficiently large, it is found that, by defining a kind of coarse-grained dissipation function, the entropy production in a reversible reaction channel can be approximately described by a type of detailed fluctuation theorem. Such a fluctuation relation has been successfully tested by direct simulations in a linear reaction model consisting of two reversible channels and in an oscillat...     

ON F-SENSITIVE PAIRS

In the present paper, we define sensitive pairs via Furstenberg families and discuss the relation of three definitions: sensitivity, F -sensitivity and F -sensitive pairs, see Theorem 1. For transitive systems, we give some sufficient conditions to ensure the existence of F -sensitive pairs. In particular, each non-minimal E system (M system, P system) has positive lower density ( Fs , Fr resp.)-sensitive pairs almost everywhere. Moreover, each non-minimal M system is Fts -sensitive. Finally, by some exampl...     

(Pr,La)_(2-x)Ce_xCuO_4单晶的极低温热传导行为

本文研究了Pr1.27La0.7Ce0.03CuO4和Pr2CuO4单晶的低温热导率行为,在极低温下热导率(κ)随磁场的变化显示出低场下的凹陷和高场下的平台现象.这种现象很可能是顺磁离子散射声子的作用引起的,在Pr2CuO4单晶的比热测量结果中,肖特基峰随磁场的变化关系表明样品中确实含有少量的顺磁离子,并且其零场下基态能级存在劈裂.因此,这些顺磁离子很可能是Pr4+离子.该结果表明铜氧化合物高温超导体中声子与自旋的强烈耦合作用.     

ITER 68 kA高温超导特大电流引线研发

国际受控热核聚变试验堆由18个D形环向场线圈、6个中心螺管线圈、6个圆形极向场线圈和18个校正场线圈组成巨大的超导磁体系统.为大幅度减小磁体系统的低温制冷设备投资和日后的运行费,采用容量分别为68、52、45和10 kA总共30对高温超导电流引线馈电.不仅电流容量特大、安全性要求特高,而且还需承受低真空下巴申放电条件的30 kV直流高电压.本文介绍68 kA电流引线的相关设计和研发.     

ALGORITHMS FOR LACUNARY VECTOR VALUED RATIONAL INTERPOLANTS

Efficient algorithms are established for the computation of bivariate lacunary vector valued rational interpolants based on the branched continued fractions and a numerical example is given to show how the algorithms are implemented,     

THE GROWTH THEOREM FOR QUASI-CONVEX MAPPINGS IN HILBERT SPACES

In this paper, the authors extend the definition of quasi-convex mappings and obtain the corresponding growth theorem.on the unit ball of a complex Hilbert space X.     

利用原子与光场的非最大纠缠态传送薛定谔猫态

利用二能级原子与腔场的共振相互作用Jaynes-Cummings(J-C)模型，制备出原子与光场的纠缠态，通过改变相互作用时间，可以控制纠缠态的纠缠程度。提出了利用这个原子与光场的非最大纠缠态，通过大失谐的J-C模型传送腔场的薛定谔猫态的方案。     

用于ICF的分频光栅的耦合波分析

用严格的耦合波理论分析用于分频的闪耀光栅验证标量理论结果的实用性.计算结果同标量理论结果进行比较表明,在提高光栅分辨力的现有指标情况下,闪耀光栅具有良好的分频效果.并同时给出了严格的耦合波理论中的截断误差对最终结果的影响.