On-line Cutting Quality Recognition in Milling Using a Radical Basis Function Neural Network

Tool wear, chatter vibration, chip breaking and built-up edge are main phenomena to be monitored in modern manufacturing processes, which are considered as important factors to the quality of products.They are closely related to the cutting parameters, which are to be selected in manufacturing process.However, it is very difficult to measure directly the cutting quality based on on-line monitoring.In this study, the relationship between the cutting parameters and cutting quality is analyzed.A Radical Basis Function (RBF) neural network based on-line quality recognition scheme is also presented, which monitors the level of surface roughness.The experimental results reveal that the RBF neural network has a high prediction success rate.     

Harmonic Retrieval Embedded in Hybrid Colored Noise: a Novel Pisarenko Method Based on Cross-high-order Cumulant

Spectral estimation method is an effective method in the case of parameter estimation of sinusoid signal in noises.It always applies cross-spectral estimation theory and high-order self-spectral estimation methods up to now.Yule-Walker equation based on cross-fourth-order cumulant is developed and Pisarenko method is provided in this paper.Simulation results show that the method is effective to retrieve sinusoid signal frequencies from hybrid colored noises and has good performance.     

青海粮油及园艺作物主要病虫害发生现状与治理对策

对我省粮油和园艺作物的病虫害发生现状进行了分析，提出了防治建议和对策。     

加强高校道德教育之浅见

道德教育是我国高校德育的重要组成部分。青年大学生的道德素质状况如何,不仅直接决定着社会的形象和民族的精神面貌,还直接关系着建设有中国特色社会主义事业的前途。道德教育历来受到党和国家的高度重视。然而,近年来随着社会上“功利主义”、“利己主义”等思潮的滋生和蔓延,大学生们的良好道德观念受到很大冲击,于是,他们为道德而困惑和迷惘。由此作者认为,进一步加强对大学生的道德教育刻不容缓。     

Cloning of aminopeptidase N promoter and its activity in hematopoietic cell and different tumor cell lines

Aminopeptidase N (APN) promoter region was cloned and sequenced from peripheral blood mononuclear cells. The recombinant reporter construct containing the promoter and luciferase gene, designated pXP1-APNLuc, was introduced into myeloblastic cell line, T lymphocyte cell line and various tumor cell lines. Luciferase assay showed that APN upstream promoter is myeloid-specific for high expression in myeloblastic cell line and much lower expression in T lymphocyte cell line. The promoter activity was relatively high in lung adenoma cell line compared with other tumor cell lines including hepatoma cell line, tong cancer cell line and esophageal cancer cell line in which the promoter activity significantly diminished or was almost undetectable. The characteristics of APN promoter may provide a new strategy for specific myeloprotection while tumor patients are being treated with chemotherapy and/or radiotherapy.     

建立不等式的Sándor-Szabó方法——献给柯召院士90寿诞

本文用文献 [4 ]中的不等式作加细为例 ,展示 [2 ]中提出的一种建立不等式的方法是有效的     

谈谈工科类毕业论文的写作与指导

撰写毕业论文是对高等学校学生的一次综合性考核。本文介绍了毕业论文选题的原则、基本要求和方法，讨论了论文提纲的拟定、资料的收集，指出了毕业论文的常见问题，最后，谈谈教师如何指导学生写作。     

4-甲基-5-烯-庚腈氧化物分子内环加成反应的立体选择性

用过渡状态理论和量子化学AM1方法,对4-甲基-5-烯-庚腈氧化物环加成反应机理进行了研究.结果表明,虽然存在得到2种产物的平行反应,但由于2个反应的速率常数比很大,基本上只得到单一的反式产物.4-甲基-5-烯-庚腈氧化物立体专一选择性不仅由活化焓决定,还与活化熵有关.     

胶束增敏荧光光度法测定甲氧氯普胺的研究

本文用荧光光度法对酸性介质中甲氧氯普胺和十二烷基硫酸钠形成的胶束配合物的性能进行了系统研究。利用胶束的增敏增稳作用，提出了测定甲氧氯普胺的荧光光度新方法。本法线性范围宽，为１．３×１０－８～８．０×１０－６ｍｏｌ·Ｌ－１，灵敏度高，检出限为１．２×１０－８ｍｏｌ·Ｌ－１。应用本法于样品中甲氧氯普胺的测定，平均回收率为９８．８％，结果令人满意。     

夹具CAD中元件设计方法的研究与实践

介绍了一种新的夹具元件设计方法。该方法通过定义基准图和关键参数,经比例变换获得新视图,不需编制参数化绘图程序,又能部分反映元件的实际尺寸,是对夹具元件设计方法的有益补充。