用户需求驱动下的国潮点心食物设计研究

目的 了解用户需求,有助于精准开发出符合用户需求的食物,对国潮点心的食物设计进行思考,提出基于Kano-AHP-AD模型的国潮点心食物设计研究方法。方法 运用Kano模型对国潮点心的20项需求指标进行统计和分析,确定国潮点心的需求属性划分;引入AHP法进行权重求解,明确国潮点心食物设计不同属性相对重要的用户需求;为了匹配生产中的设计参数,基于AD理论的独立性公理原则完成国潮点心功能域与设计域之间的映射,通过矩阵逐步判断设计合理性和最优解。结果 通过权重求解确定七项国潮点心重要用户需求项,得出满足用户需求的国潮点心应具备的设计需求参数,提出国潮点心的食物设计创新路径。结论 该设计方法通过定性和定量的结合,将主观的概念量化为具体数值,为国潮点心的食物设计提供思路。结论具有直观准确与科学合理的优势,可为后续国潮点心开发提供可靠的参考和科学的理论支持。     

基于灰度图像的压印凹凸字符质量检测研究

提出了直接在灰度图像上进行的压印字符质量检测的新方法.首先利用基于矢量和的最优圆心定位算法得到字符相似误差进行1次质量检测,然后以3点定位获得倾角误差进行2次质量检测.该方法是直接在灰度图像上提取检测特征,不仅保留图像的原始特征,克服了通常字符检测算法过分依赖于二值化算法及抗干扰性差等的弊病,而且快速,适合在线检测要求.实验表明,该方法不仅能检测不同灰度、位置和角度的压印字符,而且也适宜于有重叠、缺损等干扰的字符图像,正确检测率为97.27%.     

Symmetry energy dependence of the pygmy and giant dipole resonances in an isospin dependent quantum molecular dynamics model

Isospin-dependent Quantum Molecular Dynamics model (IQMD) has been applied to investigate the Pygmy Dipole Resonance (PDR) and Giant Dipole Resonance (GDR) in Ni isotopes by Coulomb excitation. By Gaussian fitting to the photon emission spectra, the peak energies and strengths of PDR and GDR are extracted. Their sensitivities to impact parameter, incident energy and the symmetry energy are discussed. By the comparison of energy-weighted sum rule (EWSR) with the data and other calculations for 68 Ni, the parameters of density-dependence of symmetry energy in the IQMD are constrained. In addition, the N/Z dependence of PDR and GDR parameters of Ni isotopes are investigated, and the results that the EWSR increases linearly with the N/Z are obtained.     

对一类吉布斯现象解释方法的改进

针对方波函数的傅立叶级数的部分和,指出现有表达式存在的不足。给出了新的方波函数傅立叶级数前L次谐波之和的表达式。在此基础上对吉布斯现象进行了解释。用新的方法推导出傅立叶级数的部分和极值点的计算式。     

Rotor fault condition monitoring techniques for squirrel-cage induction machine—A review

Nowadays, manufacturing companies are making great efforts to implement an effective machinery maintenance program, which provides incipient fault detection. The machine problem and its irregularity can be detected at an early stage by employing a suitable condition monitoring accompanied with powerful signal processing technique. Among various defects occurred in machines, rotor faults are of significant importance as they cause secondary failures that lead to a serious motor malfunction. Diagnosis of rotor failures has long been an important but complicated task in the area of motor faults detection. This paper intends to review and summarize the recent researches and developments performed in condition monitoring of the induction machine with the purpose of rotor faults detection. The aim of this article is to provide a broad outlook on rotor fault monitoring techniques for the researchers and engineers.     

服装推板中的比例推导法

针对服装推板缩放无章可循的现状，建立了数学比例关系推导式；经过实例演示认为，该推导对于服装结构工艺中推板的辅助线或辅助点（如腰节高、袖肘线、中档线等），甚至分割线的比例推移、放缩是一个较好的理论依据，可保证放缩后的规格系列与标准母板的造型、款式相同或相似。     

A comparison of formulas for the design of cumulative sum control charts

A conventional cumulative sum control chart has a V‐mask where each arm makes an angle θ with the horizontal and has a lead distance d. These parameters are usually related to h (=dA tan(?), A is a scaling factor) and k(=A tan(?)). Two systems of formulas are examined for deriving h and k for selected values of the in control and out of control average run lengths. This is the first time an exhaustive comparison has been made. Copyright © 2009 John Wiley & Sons, Ltd.     

多连通区域单叶函数

本文是作者在多连通区域单叶函数领域研究成果的总结．文中给出：Ｖｉｌｌａｔ公式的两个极简单证明；多连通区域的Ｓｃｈｗａｒｚ公式，Ｐｏｉｓｓｏｎ公式，Ｐｏｉｓｓｏ－Ｊｅｎｓｅｎ公式；多连通区域解析函数一参族对参数的可微性定理；多连通区域单叶函数的变分定理和参数表示定理；一类泛函极值问题的解．     

和式的Stolz估计法

本文应用Ｓｔｏｌｚ定理，给出了和式的一种估计方法，作为例子，对（Ｐ＞０）的估计进行了较为细致的讨论．     

生物数学模型中的回归分析研究

数学在生物、医学中的诸多应用实例充分阐明了生物、医学数学的现代化趋势.本文在着重讨论了如何应用多元微分及回归分析方法建立生物、医学中几类重要数学模型的同时,对如何运用回归分析进行生物学预报作了深入讨论,从而进一步探讨了生物、医学与数学相结合的新路.