多个白噪声驱动下一维周期势中粒子的迁移率

高阻尼条件下推导了在加性和乘性白噪声共同驱动下一维周期势中运动粒子的迁移率公式．当周期势为余弦势时，发现：在加性白噪声的基础上，由于周期势幅涨落导致乘性白噪声的加入，使运动粒子的迁移率增大，并且在两个噪声强度一定的条件下，运动粒子的迁移率随周期势幅的增大而减少，直至为零．     

泥炭沼泽起源及其发育特征的对比研究

通过对白俄罗斯别列金自然保护区与中国东北长白山地区典型泥炭沼泽的考察研究，从泥炭沼泽形成环境和泥炭层特征方面，详细地分析了道莫日里契科，萨弗斯克－莫赫和金川，哈尼四处泥炭沼泽的地形形态，植被类型以及泥炭剖面结构，泥炭类型等的异同性，提出泥炭沼泽形成实质是自然界中物质能量转化过程中的必然产物，也是生物循环与地质循环过程中生物化学作用的结果。     

粘塑性分析的复变边界积分方程解

提出基于初应变率的二维粘塑性分析的复变边界积分方程一般表达式，并以Ｈａｒｔ粘塑性本构模型为例进行复变边界元分析。分析表明，本方法公式乘法统一，程序通用且不依赖于特定的基本解。由于针对具体问题可调用相应的复位势基本解，从而省去了许多本来要划分的单元，提高了计算效率。     

惠民凹陷临盘油田沙二下亚段储层成岩演化

通过取心井的岩心观察和室内分析，结合沉积微相的研究，探讨了临盘油田沙二下亚段成岩作用特点，建立了滩坝沉积的埋藏成岩演化模式．通过研究认为，尽管沙二下亚段埋藏较浅，但成岩作用已达到晚成岩Ａ１期，储层总体上处于弱压实、弱胶结状态，次生孔隙较发育．由于沉积和成岩作用的共同影响，处于原始高位的坝顶砂岩为较好的油气储层．     

湍流等离子体发生器工作特性实验

为了指导湍流等离子体发生器的结构设计,基于自行研制的两路进气式湍流等离子体发生器,采用实验的手段探究了主气和保护气流量对湍流等离子体发生器工作特性(热效率、热焓值、弧压)的影响.实验结果表明:湍流等离子体发生器的弧压随着主气流量的增加而升高,而受保护气流量的影响很小;另外,弧压随着弧电流增加而降低.湍流等离子体发生器的...     

粉末冶金法制备混杂增强铜基复合材料的增强体竞争析出行为研究

Copper matrix composites reinforced by in situ-formed hybrid titanium boride whiskers (TiB_w) and titanium diboride particles (TiB_2p) were fabricated by powder metallurgy. Microstructural observations showed competitive precipitation behavior between TiB_w and TiB_2p, where the relative contents of the two reinforcements varied with sintering temperature. Based on thermodynamic and kinetic assessments, the precipitation mechanisms of the hybrid reinforcements were discussed, and the formation of both TiB_w and TiB_2p from the local melting zone was thermodynamically favored. The precipitation kinetics were mainly controlled by a solid-state diffusion of B atoms. By forming a compact compound layer, in situ reactions were divided into two stages, where Zener growth and Dybkov growth prevailed, respectively. Accordingly, the competitive precipitation behavior was attributed to the transition of the growth model during the reaction process.     

聚苯胺修饰电极研究

本文研究了苯胺电化学聚合时溶液介质种类和pH的影响,表明在中性溶液中电聚合得的循环伏安图与酸性溶液申明显不同,无还原峰出现,且峰电流随扫描次数增加而下降。报道了氯离子掺杂的聚苯胺膜对一些阴离子均有电位响应,测定了一些阴离子的选择性系数。同时研究了聚苯胺-GOD和聚苯胺-二茂铁甲酸-GOD修饰膜电极的制备条件和性能。     

水轮发电机组微机在线监测系统

给出７５ＭＷ水轮发电机组二级微机在线监测系统及其硬、软件设计．本系统可对机组运行的上百个电量与非电量参数进行实时监测、数据处理、图文显示、越限声、光报警，并形成相应报表记录，这对了解机组运行工况，分析事故原因都有重要意义．     

Improved Approximate Minimum Degree Ordering Method and Its Application for Electrical Power Network Analysis and Computation

Electrical power network analysis and computation play an important role in the planning and operation of the power grid, and they are modeled mathematically as differential equations and network algebraic equations.The direct method based on Gaussian elimination theory can obtain analytical results. Two factors affect computing efficiency: the number of nonzero element fillings and the length of elimination tree. This article constructs mapping correspondence between eliminated tree nodes and quotient graph nodes through graph and quotient graph theories.The Approximate Minimum Degree(AMD) of quotient graph nodes and the length of the elimination tree nodes are composed to build an Approximate Minimum Degree and Minimum Length(AMDML) model. The quotient graph node with the minimum degree, which is also the minimum length of elimination tree node, is selected as the next ordering vector. Compared with AMD ordering method and other common methods, the proposed method further reduces the length of elimination tree without increasing the number of nonzero fillings; the length was decreased by about 10% compared with the AMD method. A testbed for experiment was built. The efficiency of the proposed method was evaluated based on different sizes of coefficient matrices of power flow cases.