神经网络的前向生成

前向生成神经网络是一种解决映射问题的神经网络。本文介绍其基本思想、性能和训练方法。该网络的主要优点在于其隐节点数目不很大时训练的快速和输出的精确     

各向异性材料导热系数在非主方向上的转换

在研究热弹性问题时，一般对于各向异性材料，总可以找到三个主方向，并获得关于这三个主方向上的材料常数。一般在建立模型时通常将坐标系选择与主方向一致，从而使问题简化。但若坐标系选择与主方向不一致时，则主方向的数据必须经过转换才能适用于这类坐标系。本文给出了导热系数由主方向向非主方向转换的一般表达式。     

脆性材料弯曲强度试验方法评价

讨论了脆性材料弯曲强度试验机理及误差来源，指出试样材料真实特性与理想特性的差别是试验结果出现误差的一个重要因素；对脆性材料弯曲强度与拉伸强度作了简单比较，为正确评价脆性材料的力学性能及指导新材料研制提供了有益的参考。     

功能玻璃特性及其研究进展

对最近几年新型功能玻璃的研究及发展进行了回顾，重点介绍了新型功能玻璃在通信、磁记录材料、非线性光学器件等方向的应用，作者认为，随着科学和技术的发展，这类新型功能材料将会发挥越来越重要的作用。     

金刚石圆锯片切割石材过程研究

将金刚石圆锯片切割石材过程中的加工对象、加工刀具、加工工艺作为一个有机研究对象，提出金刚石对石材的切割作用主要为挤压、滑擦和压碎；金刚石颗粒的损耗过程可分为正常损耗和异常损耗；探讨了加工工艺对金刚石颗粒损耗的影响。     

高校“产学研”资源配置的结构优化模型

采用层次分析法建立了高校资源配置的结构优化模型，并进行了模拟运算。     

彩色平板玻璃的色度计算

通过数值分析，运用解析几何原理推导出计算彩色玻璃三个参数（主波长、纯度和亮度）的数学模型，编制出计算程序。利用彩色玻璃的单色光透过率，通过该程序可以快速、准确地计算该玻璃的色度值，鉴定该颜色的质量。     

PROMOTER FLOW ACTION OF SOLID-STATE LOW MELT POINT METAL ON THE POLYPROPYLENE

With the aid of a slip-disentanglement theo-ry,a reological equation has been deduced about the compos-ite system of solid-state low melting point metal and poly-mer. By measuring some rheological properties of the compos-ite system composed of low melt point metal and polypropy-lene (LMPM/PP),the results show that LMPM has a pro-moter flow action upon PP when using a small amount ofLMPM and , if some coupled agents are added,the promoterflow action will be remarkable. Moreover, while LMPM beingadded into the composite,the temperature sensitivity of systemwill go up. This indicates that the system’s viscosity will dropfurther if its temperature is increased.     

STUDY OF AIRFLOW HOMOGENEITY STANDARD IN REGENERATIVE CHAMBER OF TANK FURNACE

The authers compared six used criterions ofinflucencing homogeneity of moving airflow in virtue of er-rors such as variance Q,average square deviation T,homoge-neous indices H,inhomogeneous degree W,range R and non-uniform index S.The auther think that the effects of the er-rors will be magnified when all these old stnadards were cal-culated,especially for higher airflow homogeneity,thus,thereliability of these norms would be reduced.The authers putforward two new standards to lower influence of error.     

SYSNTHESIS AND CHARACTERIZATION OF A NEW COMPOUND K_6Ti_2Nb_(14)O_(42)IN K_2O-TiO_2-Nb_2O_5SYSTEM

A new compound K_6Ti_2Nb_(14)O_(42)was found inthe ternary system K_2O-TiO_2-Nb_2O_5.The compound was char-acterized and investigated by electron,probe,X-ray powderdiffraction and differential thermal analysis.The transpar-ent crystal of light yellow color in form of hexagon-thinplate can be grown by flux method.Further,its crystal struc-ture was determined by four-circle diffratometer K_6Ti_2Nb_(14)O_(42)crystallizes in he(?)(?)(?)onal system with unitcell parameters a=9.1106(5)×10~(-10)m·c=12.0136(9)×10~(-10)m,Z=l andspace.group P6_3/mcm(193).