基于消除地方高校成长上限基模的实证研究——以江西M学校为例

本文基于系统动力学反馈基模分析方法,在分析江西地方高校发展的成长上限基模和对策基模的基础上进行实证研究,引入相关数据,构建消除成长上限基模的顶点赋权模型,并提出综合对策思考。     

对应用投资项目财务评价指标的探讨

投资项目财务效果评价指标，按决策目的可分为绝对效果评价指标和相对效果评价指标两大类；按是否考虑资金时间价值可分为静态评价指标和动态评价指标两大类。本文将按后一种分类对项目评价中使用的各种指标的应用作以下的探讨。     

基于Internet的空分设备远程监视与故障诊断专家系统的研究

简介了远程监视与故障诊断专家系统在国内空分设备中应用的实际意义，着重分析了大型空分设备远程监视与故障诊断专家系统中远程监视模块和故障诊断模块的开发。     

Solaris下综合教务系统的管理和维护

对于Solaris下综合教务系统的管理和维护,本文从系统的优化调整,备份、恢复策略,系统安全保护措施等三个方面进行了探讨。     

Analysis of the critical heat flux in round vertical tubes under low pressure and flow oscillation conditions. Applications of artificial neural network

Artificial neural networks (ANNs) for predicting critical heat flux (CHF) under low pressure and oscillation conditions have been trained successfully for either natural circulation or forced circulation (FC) in the present study. The input parameters of the ANN are pressure, mean mass flow rate, relative amplitude, inlet subcooling, oscillation period and the ratio of the heated length to the diameter of the tube, L/D. The output is a nondimensionalized factor F, which expresses the relative CHF under oscillation conditions. Based on the trained ANN, the influences of principal parameters on F for FC were analyzed. The parametric trends of the CHF under oscillation obtained by the trained ANN are as follows: the effects of pressure below 500 kPa are complex due to the influence of other parameters. F will increase with increasing mean mass flow rate under any conditions, and will decrease generally with an increase in relative amplitude. F will decrease initially and then increase with increasing inlet subcooling. The influence curves of mean mass flow rate on F will be almost the same when the period is shorter than 5.0 s or longer than 15 s. The influence of L/D will be negligible if L/D>200. It is found that the minimum number of neurons in the hidden layer is a product of the number of neurons in the input layer and in the output layer.     

大量空间数据可视化的算法

在大量应用中，空间数据的采集和使用都是通过其空间位置进行的。在大小有限的屏幕上显示大量的空间数据常会因为邻结点的高度重叠而导致较差的视觉效果。该文提出一种可视化大量空间数据的新方法。其主要思想就是用未被使用的像素点巧妙地代替重叠的数据点。介绍了两种解决方法：(I)将重叠的数据点放置在最近的未被占用的像素点上；(2)将数据点沿着屏幕填充曲线移动。接着，发展了一个更为成熟的方法叫栅格划分算法。最后，提出了一种有待进一步研究的新方法;基于最近邻接方法的聚类方法，并指出了今后研究的方向。     

三唑并嘧啶磺酰胺类除草剂的QSAR研究（II）

三唑并嘧啶类除草剂是作用于乙酰乳酸合成酶的新一类超高效除草剂，本文采用ＣＡＳＡＣ软件中的逐步线性回归方法，在二维水平上通过讨论三唑并嘧啶类化合物对油菜ｒａｐｅ（Ｇｏｓｓｙｐｉｕｍｓｐｐ．）欧龙牙草ｃｏｃｋｌｅｂｕｒ（Ｘａｎｔｈｉｕｍ，ｓｐｐ．）曼陀罗ｊｉｍｓｏｎｗｅｅｄ（Ｄａｔｕｒａ，ｓｔｒａｍｏｎｉｕｍ），牵牛花ａｎｎｕａｌｍｏｒｎｉｎｇｇｌｏｒｙ（ｌｐｏｍｏｅａｓｐｐ。）苋菜ｐｉｇｗｅｅｄ（Ａ     

钢筋混凝土环形截面构件受弯时强度计算

空心圆形电柱在安装时可能受到弯曲作用，其强度计算，是在做了合理假定后推导力学方程式。求解方程式并非易事，即使使用计算机也只是试算求解，或采用图解法。本文给出求解联立方程组的计算方法。     

镀层在冲击条件下的失效分析

采用自行研制的冲击试验机对镀层在冲击载荷作用下的失效进行了研究。结果表明 ,由于镀层本身韧性和膜基结合强度的差别 ,镀层的失效表现为两种不同的剥落形式。韧性较低而结合强度较高时为内聚力型剥落 ,膜基结合强度较低而韧性较高时为结合力型剥落     

Synthesis and characteristics of SiC whiskers with “rosary bead” morphology

SiC whiskers with ″rosary bead″ morphology were synthesized using suitable silicon source and carbon source through solid reaction at the temperature above 1537 K. The diameter and length of the SiC whiskers were about 0.1-1.0 μm and 20-100 μm,respectively. The largest diameter of their enlarged ends of the whiskers was about 0.2-1.0 μm, and it gradually and smoothly decreased to the size of the plain part of the whiskers. The results of X-ray diffraction analysis show that the crystalline structure of the obtained SiC whiskers is β-SiC. It is considered that the SiC whiskers grow via a vapor-solid mechanism.