汽车前轮侧滑量检测误差的分析研究(英)

文章对机动车辆侧滑量在智能检测过程中存在的各类误差进行了分析和估算,并根据误差的合成与分配理论确立了影响精度的主要因素,通过研究,使侧滑误差由０－５７８ｍ／ｋｍ 减小到０－０７５２ ｍ／ｋｍ     

哈锐与近代天水城市发展

城市的发展,既有赖于土木和市政等有形工程环境的修建,更离不开经济活跃、体制探新、社会和谐和人文发扬等无形文化环境的营造。哈锐,这位回族杰出人物,正是主要以对城市文化环境的全面创造,有力地促进了西北名城天水在近代的发展。他集实业开发、教育发展、文化建设、民族和睦、企业创新、城市产业布局等多方面的探索和实践于一身、于一城,其生平业绩可与同时代中国著名实业家和城市建设者、南通的张謇相媲美。在步入城市建设黄金时代的今天,先驱者哈锐留给我们的那种弘扬人文、崇尚科学的精神财富和实践成果,具有很高的研究价值和现实借鉴意义。     

奥普尔HA202提高早花菜心产量的作用

用奥普尔(OPAL)HA202对早花菜心进行浸种和喷叶,以提高菜心产量.结果表明:施用OPAL HA202的菜心小区平均产量834g,比施用清水的对照增产41.4%,增产极显著,因为OPAL HA202增加了菜心的株高、叶片开展度、茎粗和茎叶干物重.与之对比施用吲哚丁酸(IBA)的菜心小区平均产量675g,比清水对照增产14.4%,增产不显著.     

Empirical Bayes vs. fully Bayes variable selection

For the problem of variable selection for the normal linear model, fixed penalty selection criteria such as AIC, _Cp${\mathrm{C}}_p$, BIC and RIC correspond to the posterior modes of a hierarchical Bayes model for various fixed hyperparameter settings. Adaptive selection criteria obtained by empirical Bayes estimation of the hyperparameters have been shown by George and Foster [2000. Calibration and Empirical Bayes variable selection. Biometrika 87(4), 731–747] to improve on these fixed selection criteria. In this paper, we study the potential of alternative fully Bayes methods, which instead margin out the hyperparameters with respect to prior distributions. Several structured prior formulations are considered for which fully Bayes selection and estimation methods are obtained. Analytical and simulation comparisons with empirical Bayes counterparts are studied.