基于ASP技术的高校办公自动化系统的分析与设计

对高校办公自动化系统需求进行了分析,并且介绍了系统设计的主要内容和一些实际开发经验,以及在具体实现中的关键技术.     

旋转管式膜器处理含油废水的研究

用常规方法处理乳化油污水比较困难,存在不同的问题,膜分离技术处理乳化油污水具有分离精度高,无二次污染,过程无相变等优点。     

五坐标数控快锻机的液压系统设计

对63MN五坐标数控快锻机在自由锻和恒温锻不同的工艺过程进行分析,根据压机设备压力高、流量大的特点,进行系统的优化设计。并对降低噪声、抗污染、保证系统可靠性、实现系统的高精度、高响应等要求,提出了合理的设计方案。     

A Comparative Study of High-Field Diamagnetic Fluctuations in Deoxygenated YBa2Cu3O7-x and Polycrystalline (Bi–Pb)2Sr2Ca2Cu3O10

We studied three single crystals of YBa₂Cu₃O_7-x, (Y123) with superconducting transition temperature, T_c=62.5, 52, and 41 K, and a highly textured polycrystalline specimen of (Bi–Pb)₂Sr₂Ca₂Cu₃O₁₀ (Bi2223), with T_c=108K. Isofield magnetization data were obtained as a function of temperature, with the magnetic field applied parallel to the c axis of each sample. The reversible magnetization data for all samples exhibited a rounded transition as magnetization tended toward zero. The reversible data were interpreted in terms of two-dimensional diamagnetic lowest-Landau-level (LLL) fluctuation theory. The LLL scaling analysis yielded consistent values of the superconducting transition temperatures T_c(H) for the various samples. The resulting scaling data were fit well by the two-dimensional LLL expression for magnetization obtained by Tesanovic and colaborators, producing reasonable values of κ but the fitting parameter ∂H_c2/∂T produced values that were larger than the experimentally determined ones. We performed simultaneous scaling of Y123 data and Bi2223, obtaining a single collapsed curve. The single curve was obtained after multiplying the x and y axis of each scaling curve by appropriate sample-dependent scaling factors. An expression for the two-dimensional x-axis LLL scaling was extracted from theory, allowing comparison of theoretical values of the x-axis scaling factors with the experimental values. The comparison between the values of the x-axis produced a deviation of 40% which suggests that the hypothesis of universality of the two-dimensional LLL fluctuations is not supported by the studied samples. We also observe that Y123 magnetization data for temperatures above T_c obbey a universal scaling obtained for the diamagnetic fluctuation magnetization from a theory considering non-local field effects. The same scaling was not obbeyed by the corresponding magnetization calculated from the two-dimensional LLL theory.     

基于流场数值模拟的ADS靶件结构的设计优化

采用通用的计算流体力学（CFD）软件PHOENICS 3．3和BFC计算网格生产技术，对加速器驱动次临界系统（ADS）靶件的流场进行数值模拟计算。结果表明：束窗下方导流板起引导流体沿束窗表面流动的作用，消除了束窗两侧下方较大的旋涡，对于改善束窗附近流体的流动结构、提高束窗表面及散裂靶的换热，效果显著。     

双探头光学探针识别受热工况两相流流型的基本方法研究

由于流型识别手段受到限制．目前常用的流型图以及流型转变判据．都是在绝热工况下根据实验得到的；关于受热工况两相流流型还没有足够的实验数据。光学探针的运用为受热工况两相流流型的研究提供了有力的测量手段。本文对双探头光学探针4种流型识别的基本方法进行了研究，包括探针原始电平信号概率密度函数(PDF)分析识别流型、信号时序波形识别流型、空间波形识别流型以及汽泡尺寸PDF分析识别流型。研究结果表明，汽泡贯穿弦长PDF分析可得出满意的流型识别结果。     

Rolling and swaying motion estimation for a mobile robot by using omnidirectional optical flows

Described here is a method for estimating rolling and swaying motions of a mobile robot using optical flow. We have proposed an image sensor with a hyperboloidal mirror for the vision-based navigation of a mobile robot. Its name is HyperOmni Vision. The radial component of optical flow in HyperOmni Vision has a periodic characteristic. The circumferential component of optical flow has a symmetric characteristic. The proposed method makes use of these characteristic to estimate robustly the rolling and swaying motion of the mobile robot. Correspondence to: Y. Yagi e-mail: y-yagi@sys.es.osaka-u.ac.jp     

周期性脉冲流体对滴流床反应器性能的影响

用铜铬催化剂催化的过氧化氢分解反应作为液体限制反应的例子来研究周期性脉冲流体对滴流床反应器性能的影响.初步研究表明:当催化剂非完全润湿时,周期性脉冲流体能够提高反应器的性能;当催化剂完全润湿时,周期性脉冲流体不能提高反应器的性能,甚至还会产生不利影响.     

Flow Simulation and Optimization of Plasma Reactors for Coal Gasification

This paper reports a 3-d numerical simulation system to analyze the complicated flow in plasma reactors for coal gasification, which involve complex chemical reaction, two-phase flow and plasma effect. On the basis of analytic results, the distribution of the density, tempera-ture and components‘ concentration are obtained and a different plasma reactor configuration is proposed to optimize the flow parameters. The numerical simulation results show an improved conversion ratio of the coal gasification. Different kinds of chemical reaction models are used to simulate the complex flow inside the reactor. It can be concluded that the numerical simulation system can be very useful for the design and optimization of the plasma reactor.     

660MW机组粉管内煤粉浓度测量研究

阐述了利用光学波动法测量颗粒浓度的原理,并在现场条件下,利用基于此原理的仪器对电站锅炉煤粉管道煤粉浓度分布作了测量研究,得出浓度分布规律,对电站锅炉煤粉管道浓度测量及分析电站锅炉稳燃、节能有指导意义。