铝型材时效炉设备现状

依据多台铝型材时效炉热平衡测试所得的数据,在炉型结构、经济运行及使用效果等方面对不同形式的时效炉进行分析与比较。最后提出一个由燃煤有机热载体炉集中供热的铝型材时效炉加热系统方案。     

基于图像处理的静态车牌识别技术

车牌识别技术(LPR)是智能交通系统(ITS)的重要组成部分,无论从学术方面还是实际应用方面都值得深入地去研究.从提高识别的准确性、实时性和稳定性等方面考虑,提出了一种基于车牌颜色的定位法,基于字符特征的分割法,基于模板匹配的识别法.实验表明,这种算法操作简单、识别率高,具有良好的推广应用前景.     

优质高碳钢高拉碳前期脱磷过程控制

在分析了复吹转炉脱磷的热力学与动力学条件的基础上,利用复吹转炉吹炼前期（0～8min）低温的有利条件实现钢-渣充分脱磷、倒掉脱磷渣后进行少渣冶炼、高碳下出钢。以实现复吹转炉吹炼前期高效脱磷,吹炼前期的脱磷率达到75%-93％。     

实时入侵检测系统的优化问题研究

实时入侵检测系统试图检测并响应实时的攻击。当网络中的数据量不大时,普通的IDS系统便可胜任,当网络中出现海量数据(事件)或者遇到过载攻击时,需采用优化处理的方法。文章研究了实时入侵检测系统规则集的选取规则,在此基础上,提出了一种实时入侵检测系统的优化方法,能有效地增强IDS系统在海量数据情况下的入侵检测功能。     

引入统计先验的人脸图像恢复

将人脸形状和纹理的统计先验作为约束,引入经典正则化图像恢复算法框架,并给出迭代求解算法;同时,定义了反映图像模糊程度的边缘活动度,并在迭代的每一步中计算图像的边缘活动度,以确定在迭代求解过程中人脸先验对解进行约束的程度．由于人脸统计先验的约束以及引入边缘活动度来指导迭代求解过程,避免了由经典恢复算法得到的结果中会出现的振铃波纹．对实验结果的分析和主观感受表明：文中算法在恢复质量和抗噪能力方面均取得令人满意的结果．     

浅谈1.5MW双馈风力发电机定、转子槽型的选择

发电机定、转子槽口形状直接影响到发电机感应电势中的谐波含量,同时影响到整个电机生产制造工艺及电机运行的可靠性。通过对1.5MW变速恒频双馈感应发电机定、转子各种槽型下的谐波分析,可找出在结合生产制造工艺方法及生产设备的基础上,适合的定、转子槽口形状。     

Simultaneous reconstruction of evolutionary history and epidemiological dynamics from viral sequences with the birth–death SIR model

The evolution of RNA viruses, such as human immunodeficiency virus (HIV), hepatitis C virus and influenza virus, occurs so rapidly that the viruses'' genomes contain information on past ecological dynamics. Hence, we develop a phylodynamic method that enables the joint estimation of epidemiological parameters and phylogenetic history. Based on a compartmental susceptible–infected–removed (SIR) model, this method provides separate information on incidence and prevalence of infections. Detailed information on the interaction of host population dynamics and evolutionary history can inform decisions on how to contain or entirely avoid disease outbreaks. We apply our birth–death SIR method to two viral datasets. First, five HIV type 1 clusters sampled in the UK between 1999 and 2003 are analysed. The estimated basic reproduction ratios range from 1.9 to 3.2 among the clusters. All clusters show a decline in the growth rate of the local epidemic in the middle or end of the 1990s. The analysis of a hepatitis C virus genotype 2c dataset shows that the local epidemic in the Córdoban city Cruz del Eje originated around 1906 (median), coinciding with an immigration wave from Europe to central Argentina that dates from 1880 to 1920. The estimated time of epidemic peak is around 1970.     

Optimal Design of Blocked and Split-Plot Experiments for Fixed Effects and Variance Component Estimation

In general, modeling data from blocked and split-plot response surface experiments requires the use of generalized least squares and the estimation of two variance components. The literature on the optimal design of blocked and split-plot response surface experiments, however, focuses entirely on the precise estimation of the fixed factor effects and completely ignores the necessity to estimate the variance components as well. To overcome this problem, we propose a new Bayesian optimal design criterion which focuses on both the variance components and the fixed effects. A novel feature of the criterion is that it incorporates prior information about the variance components through log-normal or beta prior distributions. The resulting designs allow for a more powerful statistical inference than traditional optimal designs. In our algorithm for generating optimal blocked and split-plot designs, we implement efficient quadrature approaches for the numerical approximation of the new optimal design criterion. Supplementary materials for this article are available online.     

解读GB/T28863-2012《商品质量监督抽样检验程序具有先验质量信息的情形》标准

新颁布的GB/T 28863-2012于2013年2月15日实施,专门针对流通环节商品的质量监督抽样检验程序,解决了流通环节商品的抽查成本高、监管效能较低下等问题,使监督检验结论的适用范围不再仅限于某一经营者或者某一批次不合格商品,有效提升了监管部门的抽检工作统筹管理,并有助于指导行业质量整改和提高。