扫描探针显微镜图像处理通用软件包的设计

扫描探针显微镜(SPM)是固体物体表面结构分析的重要手段.采用Visual Basic结合C语言编写动态链接库的方式设计了SPM图像处理的通用软件包.该软件包括SPM图像的显示、漂移校正、畸变校正、剖面线分析、傅里叶变换分析等,有效消除外界环境和仪器自身对SPM图像的干扰,丰富了SPM图的信息,并克服商品化仪器软件通用性差的缺点.     

AN INVESTIGATION ON TENSILE FRACTURE FEATURE FOR THREE KINDS OF POLYESTER FIBERS

This paper deals with the fracture feature of three kinds of polyester fibers with differentstructures under different tensile conditions.We studied fracture initiation,crack propagationand ultimate fracture characteristics under tension of polyester fibers.The fracture features ofpolyester fibers are related with fiber structure and tensile condition.Crack is initiated in fibersurface.It propagates from outside to inside and eventually causes rupture of the fiber.In addi-tion,it is stated also that the analysis on tensile fracture feature of fibers might be confirmed bydynamic testing technique of scanning electron microscopy.     

可编程控制器(PLC)控制系统的LED数码管显示

针对中小型 PL C控制系统显示中存在的占用输出点数多、执行时间长等一些实际问题 ,介绍了一种硬软件相结合的解决方法 .显示接口电路以地址译码和显示单元选择相配合 ,仅用 1 6点输出 ,即可实现最多 1 2 8位 LED数码显示 ;软件上以循环显示与更新显示方式相结合 ,程序简洁 ,电路抗干扰能力强 ,更新一位 L ED仅用两个 PL C扫描周期 .     

A STUDY OF PET TIRE CORD TREATED BY LOW TEMPERATURE PLASMA

The process of treating the PET tire cord (210D/3×2) by low temperature nitrogen and airlow temperature plasma and dipping in RFL (resorcinol-formaldehyde-latex) adhesive system wasstudied.The H-pull test value can be improved from about 35 N/cm of untreated sample to 55N/cm of nitrogen plasma treated sample.The photograph of SEM demonstrates that the adhe-sion between nitrogen plasma treated tire cord and rubber has reached the strength of rubber.Airplasma treatment has bad effect on adhesion improvement.The mechanism of plasma treatment on the surface of the PET tire cord and the mechanism ofadhesion improvement are investigated by diffuse reflection infra-red spectrum and XPS (X-rayphotoelectron spectroscopy).From the spectral analysis,it is believed that the contribution to im-provement of the adhesion of the tire cord is the oxidation on the surface.The serious breaking ofthe chemical bonds on surface can cause the adhesion inferior.     

直线斜率绝对值大于1的数值微分扫描转换算法

数值微分法、中点法、Bresenham算法是直线扫描算法中的三个常用算法，这三个算法均未讨论斜率大于1的情形．给出适用于斜率大于1的数值微分算法。     

浅析大学英语四级阅读测试特点及教学对策

本文分析了近三年大学英语四级考试阅读理解题的选材趋势与命题特点，提出英语阅读教学应从扩大阅读范围、掌握阅读方法、限时阅读训练和解题方法指导四个方面来开展，旨在培养学生的阅读理解能力和提高学生的答题正确率。     

AGC伺服油缸动态测试扫频方式的研究

以AGC伺服油缸的动态扫频方式为例，建立了伺服油缸动态测试系统的数学模型，并在其基础上解决了如何确定动态扫频过程中的采样速率(或采样周期)，即k值以及扫频点数的选取问题。     

种子实物扫描图像特性研究

对种子实物扫描图像的特性进行了细致分析．实验研究表明：种子实物扫描图像精度高，变形小，质量好，不易受外界环境和人为因素的影响，能够满足种子图像外部特征数据采集的要求．     

扫描电镜及电子能谱对硅酸钙水合晶体生产过程的研究

以扫描电镜-电子能谱为主要研究手段,并辅之以X-射线衍射、透射电镜-电子衍射等结构分析方法,对蒸压条件下硅酸钙水合晶体的生成过程进行了较为系统的研究。结果表明,硅酸钙水合晶体的生成经历了水合C_a~(2+)离子扩散进入圆筛藻孔道中、晶核的形成、晶种的生成、晶体长大等几个主要阶段。并结合不同的反应阶段对制备条件的要求进行了有关的讨论。