基于频率采样技术的FIR数字滤波器优化设计

本文提出了一种FIR数字滤波器满意优化设计方法，将滤波器过渡带样本值作为优化变量，通过设计通带、过渡带和阻带性能指标满意度函数和综合满意度函数，构造出满意优化模型，并用本文提出的新量子遗传算法搜索满意解，FIR高通和带阻数字滤波器的设计结果表明，采用满意优化方法设计的FIR滤波器的性能优于传统方法。     

环氧高分子耐酸碱漆通过省级鉴定

随着石油工业的迅猛发展，石油产品的生产和使用量日益增加，贮油量也随之增加。由于化工设备作用环境(湿度、压力、介质等)日益苛刻，腐蚀而造成的破坏事故比例日益提高。针对贮油罐及管道防腐的问题．齐齐哈尔北方油漆化工集团有限公司去年就投入人力、物资研制防蚀系列漆及环氧高分子耐酸、碱漆。     

VC++中运用OLE和宏实现OFFICE软件考试自动评分

提出了一种通过OFFICE97宏录制改编来获取宏语言 ,进而利用OLE自动化在VC ++中实现OFFICE97软件考试自动评分的方法 ,并给出了实例     

化学工业固体废物毒性分析研究

介绍了对硫酸烧渣和磷石膏两种固体废物进行急性毒性和浸出毒性鉴别试验的过程与结果,并对磷石膏由危险废物转变为非危险废物的原因进行了探讨,为硫酸烧渣和磷石膏的处置和利用提供了依据.     

斜盘式锥齿少齿差减速器传动件加工新方法

对斜盘式锥齿少齿差行星减速器的一些重要传动元件的制造方案进行了系统研究和论证．主要包括内啮合锥齿轮副、输入轴-斜盘、歪轴的制造及装配、检测工艺等．通过引入内锥齿轮副鼓形齿修正等新工艺理论，为斜盘式锥齿少齿差行星传动的工业应用奠定了基础．     

Authorware中声画同步实现技术

用Authorware制作多媒体课件时，经常需要处理声音与画面同步的问题。     

STEM项目化学习智能导师系统设计研究

智能导师系统作为典型的教育类人工智能产品,能够利用人工智能技术赋能STEM项目化学习。本文从用户模型、领域知识库、教学策略推理机、人机接口、界面设计等方面分析设计了STEM项目化学习智能导师系统。本系统给予了用户个性化的智能教学服务,提高了其教学设计水平以及教学认知水平。期望通过本系统能够促进K12教师STEM项目设计能力发展,助力K12教师STEM项目实施。     

Wear Resistance of CO2 Corrosion Product Scale Formed at High Temperature

 To investigate the correlation between structure characteristics and wear resistance of CO2 corrosion product scales at high temperature and high pressure, an autoclave was used to prepare CO2 corrosion product scales on N80 steel in carbon dioxide corrosion environment. The correlation between wear resistance of the scales and many other factors, such as temperature, pressure, morphology, structure, velocity of fluid medium, sand grain size, and so on, was comparatively analyzed by a self assembled wear device, and the scale morphologies before or after being worn were observed by scanning electron microscope (SEM). And then the surface grain size and thickness of scale were measured. The results showed that the cross section of the corrosion scale was of a double layer structure, the outer layer of which was composed of regular crystals, whereas the inner layer was a thin scale of fine grains. The outer grain size and thickness of scale varied with temperature, and the initial wear loss was consistent with the surface grain size; at the same time, the total wear loss corresponded to the thickness of scale. Compared to wear resistance in different depths of the scale, it was found that the structure of scale was a double layer structure in cross section, and the wear resistance of inner layer was better than that of the outer layer; the closer the scale to the matrix, the greater was the wear resistance of scale; and the larger the size or the higher the rotary speed of solid grain in multiphase flowing medium, the more was the wear loss of scale.