Monitoring and change-point estimation for spline-modeled non-linear profiles in phase II

In some applications of statistical quality control, quality of a process or a product is best characterized by a functional relationship between a response variable and one or more explanatory variables. This relationship is referred to as a profile. In certain cases, the quality of a process or a product is better described by a non-linear profile which does not follow a specific parametric model. In these circumstances, nonparametric approaches with greater flexibility in modeling the complicated profiles are adopted. In this research, the spline smoothing method is used to model a complicated non-linear profile and the Hotelling T² control chart based on the spline coefficients is used to monitor the process. After receiving an out-of-control signal, a maximum likelihood estimator is employed for change point estimation. The simulation studies, which include both global and local shifts, provide appropriate evaluation of the performance of the proposed estimation and monitoring procedure. The results indicate that the proposed method detects large global shifts while it is very sensitive in detecting local shifts.     

Ethnic differences in the academic achievement process in Canada

This research examines the extent to which differences in achievement between German-speaking and French-speaking students are accounted for by theoretically related intervening variables and the extent to which the entire achievement process differs across the two ethnic groups. For the two ethnic groups, both main effects and interaction effects have significant consequences for the academic achievement process, even when a number of other variables are controlled. The results suggest that the whole process works to the benefit of the German-speaking students and to the detriment of the French-speaking students.     

明成祖的亲王守边政策

以往学界认为 ,明成祖在即位后将塞王内徙 ,以天子守边和总兵镇边取代了藩王守边。但对已发现材料的考察表明 ,在永乐十一年四月以前的大部分时间里 ,成祖之子汉、赵二王曾先后防守北京一带 ;二王拥有较大的军、政权力 ,可以统帅大将 ,抗击蒙古 ,地位接近于洪武末年的塞王 ;永乐初年塞王内徙出于本王自请 ,成祖只是顺水推舟而已 ;永乐时留在北边的其他塞王可起拥有护卫以壮边防声威之效 ,在定位上与洪武末年的安边保国不同     

内蒙古绒山羊KAP6-2全长cDNA的特征分析

选择10月份周岁绒山羊体侧部皮肤构建cDNA质粒文库,随机挑选克隆提取质粒,用M13正向通通用引物,测插入片段的序列,得到636个序列。与Genebank数据库比对后,发现有1个序列与小鼠的KAP6-2基因的期望值小于le-10,对其预期编码蛋白的氨基酸进行分析,建议绒山羊KAP6-2具有HGTps(高苷/酪氨酸蛋白,high glycine/tyrosine proteins)与富含半胱氨酸蛋白之间的中间特征。     

"入世"后中国人力资源开发面临的机遇与挑战

"入世'后,中国人力资源开发面临人才成长与发展的环境危机,但"入世"也使国人增强了尊重知识、尊重人才的意识,加强了国家之间的交流与合作.面对机遇和挑战,我们应当高度重视人力资源的开发,大力发展教育,加大人才制度的改革,建立和健全人才录用与激励机制.     

中国人口年龄结构变动对出生率的影响研究

本文利用相关年份的《中国统计年鉴》和人口普查数据,根据粗出生率与总和生育率的关系与特征,构建了人口年龄结构系数及其对粗出生率变动影响的贡献率指标,分析了建国以来人口年龄结构变动对出生率的影响。研究发现：1949—1979年,人口年龄结构变动对出生率的影响很小;1980—1993年,人口年龄结构变动对出生率的影响迅速上升,年龄结构的贡献率增大;1994—2008年,人口年龄结构变动对出生率的影响趋于下降,人口惯性势能在减弱;2009—2011年,受80—90年代出生高峰的影响,人口年龄结构变动对出生率的影响再次凸显,年龄结构的贡献率迅速增大。从年龄别生育率逐年下降的特点,也可以证明近年推动我国人口增长的力量主要是由于年龄结构带来的惯性增长。     

推广的简单方程方法对两个非线性发展方程的应用

本文借助于计算机代数系统Mathematica,利用推广的简单方程方法成功获得了Joseph-Egri方程和(2+1)-维KP方程新的精确行波解,并且分别以含两个任意参数的双曲函数、三角函数及有理函数等三种形式表示,其中双曲函数表示的行波解中参数取特殊值时可得到孤波解。     

O2O电子商务:动力、模式与前景分析

电子商务交易中消费人群必须上网、诚信体系不完善、线上推广成本日益提升、物流配送覆盖有限等问题,均导致电子商务无法对传统线下销售形成颠覆性改变。这就导致业界中出现了线上交易与线下交易的结合方式,即O2O电子商务。本文从对消费者价值、对电商企业的角度分析了O2O电子商务模式发展的动力所在,并根据O2O的特点总结出适合采用O2O模式的商品类型即服务型和体验型的产品。其次,本文总结了O2O商务发展的遭到创新、诚信和线上流量等瓶颈,接着分析了单纯线上和线下企业发展O2O电子商务面临的挑战和问题。最后展望了O2O模式未来的发展,即未来的O2O将是一种多层次、多维度的复合生态体系,不断向多元化和纵深化发展。     

Uq(sl2)的限制表示的例

文章给出当q是单位根时,量子群Uq(sl2)的限制表示的例.并用箭图画出它的构造.