Synchronization-based topology identification of uncertain stochastic delay complex networks

In this paper, topology identification of general weighted complex network with time-varying delay and stochastic perturbation,which is a zero-mean real scalar Wiener process, is investigated. Based on the adaptive-feedback control method, the stochastic Lyapunov stability theory and the ito formula, some synchronous criteria are established, which guarantee the asymptotical mean square synchronization of the drive network and the response network with stochastic disturbances, as well as identify the topological structure of the uncertain general drive complex network. Finally, numerical simulations are presented to verify the correctness and effectiveness of the proposed scheme.     

脱绒棉种介电常数与含水率的关系

脱绒棉种含水率是影响棉种的介电常数的关键因素,为给脱绒棉种介电分选关键参数的后期研究提供依据,利用介电常数的测量装置以及MA45C-000230V1水份测量仪等装置对脱绒棉种介电常数与含水率等因素进行了试验,运用SPSS软件对脱绒棉种介电常数进行了方差分析和残差分析,并分析了脱绒棉种介电常数与棉种含水率二者之间的关系,以及脱绒棉种介电常数的区间估计和预测。结果表明:脱绒棉种介电常数与棉种含水率之间最优回归方程为^Y=10.606+90.943X,统计数据点与回归方程线拟合良好;棉种含水率为0.07时介电常数的估计区间为[15.80878,18.13587],预测值为16.9723。     

浅谈如何做好高校固定资产管理

固定资产是学校办学赖以生存的基本条件,是社会资源的重要组成部分,是促进学校发展的物质基础,也是反映单位资产占有规模大小的标志.文章通过阐述高校固定资产核算特点,分析高校在固定资产管理中存在的账实不符、闲置浪费等问题及成因,并提出了对固定资产的进入、使用、退出的全过程动态管理的若干措施.     

Hydrothermal synthesized porous Co(OH)2 nanoflake film for supercapacitor application

Porous Co(OH)2 film directly grown on nickel foam is prepared by a facile hydrothermal method.The as-prepared Co(OH)2 film possesses a structure consisting of randomly porous nanoflakes with thicknesses of 20-30 nm.The capacitive behavior of the Co(OH)2 film is investigated by cyclic voltammograms and galvanostatic charge-discharge tests in 2 mol/L KOH.The porous Co(OH)2 film exhibits a high discharge capacitance of 935 F g-1 at a current density of 2 A g-1 and excellent rate capability.The specific capacitance keeps a capacitance of 589 F g-1 when the current density increases to 40 A g-1.The specific capacitance of 82.6% is maintained after 1500 cycles at 2 A g-1.     

基于时不变ARMA模型的线性多自由度结构参数识别

简单介绍了时不变ARMA模型的数学描述，并阐述了结构参数与ARMA模型参数之间的对应关系：通过实例分析说明了ARMA模型用于工程结构识别的可行性；最后用一维ARX模型和ARVX模型对同一结构进行识别，从而得出多维模型在结构识别领域有更广阔的应用前景。     

醇醚琥珀酸单酯磺酸钠合成新工艺及性能研究

针对目前脂肪醇聚氧乙烯醚琥珀酸单酯磺酸钠的工业生产现状用正交试验法进行了工艺条件的优化研究．采用自制催化剂（ＰＴ），使工艺条件大为改善：酯化反应温度由１２０℃降至７０℃；反应时间由１５ｈ降至２ｈ；收率由９５％增至９８７％（质量分数）．为其优质低耗生产开辟了一条新途径．分析了其表面化学特性及应用前景．     

分式布朗运动的极限定理

研究了一列分式布朗运动的起伏极限，证明了广义收敛意义下的大数定律和中心极限定理。本文结果曾作为公告发表，文中给出的是该结果的详细证明。     

Researches on the key technology and equipment for rapid construction of long tunnels with large section

Excavation and lining are two main and important tasks in tunnel construction. Conventional sequential operations may not be appropriate due to time limit for a project and the high cost of construction. The authors developed the new mode of tunnel construction that excavation and lining can be operated simultaneously. The new mode of tunnel construction was applied in Dahuofang Water Conveyance Project in Liaoning Province successfully. This paper makes a comparison of Main Beam TBMs and Double Shield TBMs, the type selection of TBM used in Dahuofang Water Conveyance Project, and the features of Full-ring Inner-through Lining Shutter Jumbo which solves the problem of interference between excavation and lining.     

制氢转化炉炉管长期服役后损伤评价

针对已服役10 a的制氢转化炉炉管,分析了炉管沿轴线的损伤状况.结合剩余寿命,对炉管的损伤程度进行了分级,得到了整根炉管各部位的损伤级别以及沿炉管纵向的损伤分布.结果表明炉管的累积损伤具有局部性,下部高温段的焊缝损伤较母材严重.因此,对于达到服役寿命的炉管,通过损伤分析,可局部更换下部炉管.     

略论欧元启动后的国际金融效应

欧元启动后,产生了明显的国际金融效应,对美元形成了挑战,国际货币格局也随之发生重大变化.欧元与美元的竞争,实质上是欧美之间以经济为基础综合国力的较量,它将存在于今后一个很长的历史时期.