烟气轮机动叶片断裂分析

对进口的Ｅ—２３２型悬臂式两级烟气轮机的二级动叶片断裂进行了分析，其原因是由于材料热处理温度偏高、烟气中催化剂粉尘浓度高、叶片被冲蚀减薄而产生的疲劳断裂。最后提出了防止断裂的对策。     

A survivable routing protocol for two-layered LEO/MEO satellite networks

Due to the rapid development of space communication, satellite networks will be confronted with more complex space environment in future, which poses the important demand on the design of the survivable and efficient routing protocols. Among satellite networks, two-layered Low Earth Orbit (LEO)/Medium Earth Orbit (MEO) satellite networks (LMSNs) have become an attractive architecture for their better communication service than single-layered satellite networks. To determine the topological dynamics of LMSN, the satellite group and group manager (SGGM) method is a prevalent strategy. However, it can not precisely capture the topological dynamics of the LEO layer, which may result in the unreliability of data transmission. Besides, most existing routing protocols based on the SGGM method will collapse once any top satellite fails. To overcome both limitations, this paper proposes a new topology control strategy for LMSNs. The proposed strategy determines the snapshot in terms of the topological change of the LEO layer, which ensures the topological consistency of routing calculation. Moreover, a new survivable routing protocol (SRP) is presented for LMSNs by combining both centralized and distributed routing strategies. The SRP can provide strong survivability under the LEO or MEO satellite failure. Besides, it can also achieve the minimum delay routing provided the MEO layer can effectively work. The performance of SRP is also evaluated by simulation and analysis.     

自适应模糊奇异摄动控制在航天器中的应用

带挠性附件航天器可以用含小摄动参数的多时标非线性系统进行描述,而目前的控制方法大多针对多时标线性系统,要求模型精确已知.为解决存在不确定性的带挠性附件航天器的跟踪问题,提出一种基于模糊奇异摄动模型的自适应控制器,采用鲁棒控制和自适应控制理论相结合的方法进行设计,由反馈项、自适应项和鲁棒控制项组成,反馈项的增益采用线性矩阵不等式(LMI)方法求解,自适应项用于减小系统的跟踪误差,鲁棒项用于保证系统的闭环稳定性.稳定性证明采用Lyapunov合成方法完成.该控制器适用于模型带有不确定性的多时标非线性系统的跟踪控制.由于采用了自适应方法消除系统不确定性,能够减少鲁棒控制方法带来的保守性.在带挠性附件航天器的跟踪控制中的应用验证了其有效性.     

一种基于思维进化算法的变压器故障诊断方法

本文提出了一种基于思维进化算法的变压器故障诊断方法。该方法以变压器油中特征气体的含量作为输入参数,根据趋同和异化的原理进行搜素,从而得到输入和输出变量之间的对应关系。实例分析计算表明,采用该方法对变压器进行故障诊断是有效的。     

咪唑烷的合成新方法

报道了以硫氰酸甲酯为原料合成咪唑烷的方法, 总收率为５６－５ ％ 。     

Threshold privacy-preserving cloud auditing with multiple uploaders

International Journal of Information Security - Data integrity is a critical security issue in cloud storage. The data integrity checking schemes by a third-party auditor (TPA) have attracted a lot...     

一种新的中长期电力负荷预测方法

本文提出了一种新的中长期电力负荷预测方法。该方法将回归与自回归模型进行了有机的综合，形成了时间序列混合回归数学模型。采用ＢＩＣ准则函数进行选元定阶。较好地提高了预测精度。经实例计算得到了满意的结论。     

Rapid and large‐scale separation of magnetic nanoparticles by low‐field permanent magnet with gas assistance

Bubbles can be used to greatly improve the speed of magnetic separation (MS) and overcome the limitation of magnetic force on the capture distance, making low‐field MS highly efficient and easily scalable. This novel method leads to the development of a medium‐free continuous gas‐assisted magnetic separator on small pilot scale using low‐field permanent magnet. This separator is demonstrated highly efficient for recovery of proteins‐loaded magnetic nanoparticles from large volume biosuspension. © 2014 American Institute of Chemical Engineers AIChE J, 60: 3101–3106, 2014     

可导通非电起爆系统研究

阐述采用非电导爆管组装成全封闭系统，以实现网路导通检查，并有效控制瓦斯引爆。