基于YH-F2 系统的一般算术表达式的并行成分识别

本文深入研究了基于ＹＨ－Ｆ２系统的算术表达式的并行计算特点,提出了嵌套层次树的概念和相应的计算模式。这种模式充分利用了ＹＨ－Ｆ２系统的并行计算能力,完满地解决了基于ＹＨ－Ｆ２的算术表达式的并行编译问题     

Cyclic scheduling in robotic flowshops with bounded work‐in‐process levels

This study addresses cyclic scheduling in robotic flowshops with bounded work‐in‐process (WIP) levels. The objective is to minimize the cycle time or, equivalently, to maximize the throughput, under the condition that the WIP level is bounded from above by a given integer number. We present several strongly polynomial algorithms for the 2‐cyclic robotic flowshop scheduling problems for various WIP levels. © 2010 Wiley Periodicals, Inc. Naval Research Logistics 58: 1–16, 2011     

EMS型低速磁浮列车U型电磁铁设计方法研究

针对EMS型低速磁浮列车的U型电磁铁,研究其气隙磁密及结构参数的设计方法.气隙磁密应选为铁芯材料的磁导率下降到其最大值的90％时所对应的磁密.结构参数包括极长、极高、窗宽、窗高和轭厚,极长影响牵引效率及过弯能力,极宽影响承载能力和导向刚度,窗宽和窗高影响重量,但随轨宽而定,轭厚按磁轭与磁极的磁密相等的原则来选取.     

炮兵武器毁伤效能的后验计算方法研究

根据试验结果和武器性能对毁伤效能的计算和排序问题,给出了计算炮兵武器毁伤效能的指数法模型和加权平均模型;结合实例计算并排序,使对压制兵器和反坦克兵器的综合毁伤效能有定量的直观认识;进而分析了两种模型的特点;并提出了需要进一步研究的问题。     

The impact of component commonality on composite assembly policies

Assemble in Advance (AIA) policy reduces assembly cost due to advance planning, while Assemble to Order (ATO) policy eliminates assembly of excessive (more than demanded) units. The tradeoffs between the two policies have been studied in the past for single product environments. Moreover, it was shown that it is beneficial to employ AIA and ATO simultaneously. In this article, we study the employment of such a composite assembly policy in a multiproduct environment with component commonality. When common components are used, ATO may also enable us to benefit from the risk pooling effect. We provide important managerial insights such as: the multiperiod problem is myopic and changes in inventory levels due to the use of common components, and demonstrate the potential profit increase compared to other policies.© 2007 Wiley Periodicals, Inc. Naval Research Logistics, 2007     

Optimal burn‐in procedure for periodically inspected systems

Burn‐in is a widely used method to improve the quality of products or systems after they have been produced. In this paper, we study burn‐in procedure for a system that is maintained under periodic inspection and perfect repair policy. Assuming that the underlying lifetime distribution of a system has an initially decreasing and/or eventually increasing failure rate function, we derive upper and lower bounds for the optimal burn‐in time, which maximizes the system availability. Furthermore, adopting an age replacement policy, we derive upper and lower bounds for the optimal age parameter of the replacement policy for each fixed burn‐in time and a uniform upper bound for the optimal burn‐in time given the age replacement policy. These results can be used to reduce the numerical work for determining both optimal burn‐in time and optimal replacement policy. © 2007 Wiley Periodicals, Inc. Naval Research Logistics, 2007     

一种新型的计算化学非平衡流动的解耦方法

给出一种计算化学非平衡流动的解耦方法。利用该方法从薄层近似N S方程出发 ,采用NND2M差分格式 ,数值模拟了H2 /O2 燃烧的超音速绕流场 ;计算表明这种方法可以有效地解决刚性问题 ,而且与现有的隐式算法相比 ,具有公式推导简便 ,占用内存少 ,计算效率高等优点 ,特别适合于多组分和多反应的情况     

用于闭式循环柴油机不依赖空气推进装置的吸收器尺寸估算模型研究

根据闭式循环柴油机推进装置（ＣＣＤＡＩＰ）的废气处理要求,研究提出了旋转式二氧化碳吸收器的填料内径、外径、轴向高度的估算数学模型,并对用水吸收二氧化碳的吸收器填料设计尺寸进行了操作安全性校核．     

有限精度的 BP 神经网络高速算法

精度要求是神经网络硬件实现的一个关键问题。本文提出了一种有限精度的BP高速算法，通过实例验证，该算法适于低精度，且收敛速度快。     

RLPG 雾化模型中的液滴直径关系

应用激光衍射瞬变喷雾场测量系统，进行了再生式液体炮（ＲＬＰＧ）环形喷嘴雾化特性的实验研究，得到了环形喷嘴瞬变喷雾场平均液滴直径的经验关系式，并与ＲＬＰＧ雾化模型中几个常用的液滴直径关系式进行了比较，得到了一些有价值的结论。