西气东输淮武线管道工程项目的组织与管理

概述了管道工程项目管理基本模式的沿革过程.结合西气东输淮武线管道建设的工程实际,总结和研究了淮武线管道工程项目的组织管理模式和成功经验,为长输油气管道工程建设的组织与管理提供了可借鉴的科学依据.     

FENG Guo-dong, et al

Aim To investigate a new method for synthesis of an Immobilized-Metal Affinity Chromatography(IMAC) adsorbent with superparamagnetism(Fe3O4/SiO2-GPTMS-Asp-Co).Method The magnetic microspheres were synthesized in situ modification and the transmission electron microscope,field emission scanning electron microscopy,X-ray diffractometer,energy spectrometer and vibrating sample magnetometer were used to characterize the appearance,particle size distribution,phase composition,chemical constituents and magnetic properties of silica magnetic microspheres(MMS).Results The silica MMS prepared by reverse microemulsions exhibit a superior core-shell structure.The size distribution of the microspheres varies from between 100 nm to 200 nm and the main phase of microspheres is amorphous SiO2 and spinel Fe3O4.The microspheres retain superparamagnetism and can be used as biomaterials.Conclusion The result indicates that the IMAC adsorbent we prepared has outstanding advantages in the separation of the natural products proteins from the crude bacterial lysate,such as simple operation,high selectivity and capacity.     

Neural network-based H∞ filtering for nonlinear systems with time-delays

A novel H∞ design methodology for a neural network-based nonlinear filtering scheme is addressed. Firstly, neural networks are employed to approximate the nonlinearities. Next, the nonlinear dynamic system is represented by the mode-dependent linear difference inclusion （LDI）. Finally, based on the LDI model, a neural network-based nonlinear filter （NNBNF） is developed to minimize the upper bound of H∞ gain index of the estimation error under some linear matrix inequality （LMI） constraints. Compared with the existing nonlinear filters, NNBNF is time-invariant and numerically tractable. The validity and applicability of the proposed approach are successfully demonstrated in an illustrative example.     

Backward stochastic viability and related properties on Z for BSDEs with applications

This paper investigates some important properties of Z,the martingale integrant of the backward stochastic differential equations,which is the second process of the solution.These include the backward stochastic viability property,bounded property and the comparison theorem.To explain the theoretical results,the authors apply them to study a financial contingent claim pricing problem. The replication portfolio process can be characterized clearly.     

A Novel Algorithm for DOA Estimation in Asynchronous DS-CDMA Systems

A novel algorithm for DOA estimation using linear antenna array in the asynchronous DS-CDMA systems is presented in the presence of channel mismatches or signal fading between the sensors. Code-matched filters and parallel MUSIC algorithms are proposed to overcome the restriction that the number of array elements must exceeds the number of the sources for subspace-based direction of arrival. It can be shown that multiple access interference throughout the code-matched filter is asymptotically Gaussian in the asynchronous DS-CDMA systems. A relevant performance analysis is derived. Computer simulation proved the efficiency of the proposed algorithm.     

学习师德师风教学反思

师德是教师最重要的素质.加强师德建设是教师队伍建设最为重要的内容.本人把本学期的德育方面的情况进行了总结,提出来与大家商榷.     

高分子表面改性：黏附部分——第三卷

本书是由第四届国际表面改性研讨会的会议录的黏附理论部分编辑而成，前两届会议录均以书籍形式出版了，第三届研讨会会议录由于各种原因没有以书籍形式出版。     

红外双色亚图像识别研究

研究了红外双色辐射特性和双色比识别特征 ,分析了红外亚成像的灰度与空域特征。研究了双色比区分伪目标 ,灰度扩展亚成像方法。研究了亚图像子块灰度直方图的迭代二值化 ,二值分割后的空域模糊分割。研究了单元扫描亚图像识别的特征参数 ,初始成像多帧配准识别实现低虚、漏警率目标检测 ,并通过锁定目标实施连续逐帧分割、识别。实验表明 ,所研究的红外双色亚成像识别方法适用于静止、慢速和快速红外目标的实时识别     

一种基于H∞理论的滑模变结构控制器设计

为避免未建模误差对系统性能的影响,采用滑模面的频域整形方法提出了一种基于Ｈ∞理论设计滑模面的变结构控制器,并将其运用到一泵控马达伺服系统中。仿真结果表明这种控制器对建模误差有很强的鲁棒性。     

刨煤机刨刀刨削煤层动力学模拟研究

刨刀刨削煤壁的过程中,切削角和刨刀的宽度影响刨刀的受力.为了减小刨刀的受力及冲击,根据刨煤机的实际工况,建立刨煤机刨削煤层的三维模型,并运用Hypermesh和LS-DYNA分析单个刨刀刨削煤层的受力状态.对不同切削角的刨刀进行仿真分析,结果表明:切削角为90°时,刨刀受力较大;切削角为70°时,刨刀受力较小.对不同宽度的刨刀进行仿真分析,结果表明:宽刨刀对煤层刨削区域影响大,刨削阻力较大,有利于刨削脆性煤层;窄刨刀对煤层的刨削区域影响小,刨削阻力小,有利于刨削粘性煤层.