基于多信息融合的视觉目标类识别算法研究

视觉目标类识别是计算机视觉研究领域中的最具挑战性的难题之一,目前仍有许多问题没有得到很好的解决.近年来提出的空域金字塔直方图特征表示,在描述特征点集分布属性方面取得了比较好的实验效果.但是由于其描述的信息不全面,在性能上仍有较大改进余地.从信息互补性角度出发,提出了基于多信息融合的集成策略,将空域金字塔直方图表示与费舍分数表示各自描述的优势相结合,用于视觉目标类识别.实验证明该策略是有效的,在所进行测试的所有类别上相比单信息识别的性能均取得了一致性提高.     

Relationships among milk yield,body condition,cow weight,and reproduction in spring-calved Holstein-Friesians

Relationships among milk production, body condition score (BCS), body weight (BW), and reproduction were studied using logistic regression on data from 6433 spring-calving Holstein-Friesian dairy cows in 74 commercial herds. Multivariate models were adjusted for herd, breeding value for milk yield, proportion of Holstein-Friesian genes, lactation number, calving period, and degree of calving assistance. Significant associations between reproductive measures and components of energy balance were identified. Higher 200-d milk protein content and higher protein-to-fat ratio at start of breeding were associated with increased likelihood of submission for breeding in the first 21 d of the breeding season (SR21). High 100-d cumulative milk yield as a proportion of estimated 305-d milk yield (low persistency) was associated with a lower likelihood of pregnancy to first service (PREG1), whereas cows reaching peak milk yields earlier tended to have higher PREG1. Cows that reached nadir milk protein content relatively late in lactation had lower PREG1. Milk yield at first service and 305-d milk protein content were positively associated with the likelihood of pregnancy after 42 d of breeding (PR42). Higher 305-d milk lactose content was associated with increased PREG1 and PR42. Mean BCS at 60 to 100 d of lactation was positively associated with both SR21 and PR42, whereas nadir BCS was positively associated with PREG1. Cows with precalving BCS > 3.0 that also lost > 0.5 BCS unit by first service had lower PR42. More BW gain for 90 d after start of breeding was associated with higher SR21 and PREG1; more BW gain for 90 d after first service was associated with higher PR42. Milk protein and lactose content, BCS, and BW changes are important tools to identify cows at risk of poor reproduction.     

Study on ceramic photonic bandgap structure with three-dimensional diamond lattice

A novel process, which was based on powder injection molding, was investigated for the fabrication of ceramic photonic bandgap structure with three-dimensional diamond lattice. The SiO2-TiO2 ceramic powder was mixed with a water-soluble agent to produce slurry. The slurry was then injected into an epoxy mold with inverse diamond lattice, fabricated by the stereolitographic rapid prototyping process. To increase the density of the green compact, cold isostatic pressing was applied on the unit. Using thermal debinding, the water-soluble agent and the epoxy were extracted at 360 and 650 K, respectively. Sintering was immediately done at 950 K for 5 h and the desired three-dimensional ceramic structure was obtained. The calculated band diagram for this structure indicated the existence of an absolute photonic bandgap for all wave vectors. At 14.7-18.5 GHz, a complete band gap was located with a maximum attenuation of 30 dB at 17 GHz, when transmission was measured in the 〈100〉 direction between 10 and 20 GHz.     

基于拉普拉斯评分的多标记特征选择算法

针对传统的拉普拉斯评分特征选择算法只适应单标记学习,无法直接应用于多标记学习的问题,提出一种应用于多标记任务的拉普拉斯评分特征选择算法。首先,考虑样本在整体标记空间中共同关联和共同不关联的相关性,重新构建样本相似度矩阵;然后,将特征之间的相关性及冗余性判定引入拉普拉斯评分算法中,采用前向贪心搜索策略依次评价候选特征与已选特征的联合作用能力,用于评价特征的重要性;最后,在5个不同评价指标和6个多标记数据集上实验。实验结果表明：相比基于最大依赖的多标记维数约简方法（MDDM）、基于贝叶斯分类器的多标记特征选择算法（MLNB）及基于多元互信息的多标记分类特征选择算法（PMU）,所提算法不仅分类性能最优,且存在显著性优异达65%。     

论音乐空间与建筑空间的对应性

本文论述了音乐空间与建筑空间的对应性关系,同时以此为基础对将乐谱这一视觉化了的音乐空间转组并移注于建筑空间的实验理论和操作方法进行了探讨和提示。     

中西医结合治疗高血压合并脑梗死的疗效分析

探讨中西医结合疗法对高血压合并脑梗死患者神经功能和日常生活的影响。实验方法如下：选择高血压合并脑梗死患者70 例,随机分为治疗组与对照组,每组35 例,对照组给以常规西医治疗,治疗组在对照组基础上加服中药汤剂,两组均治疗30 d。结果显示：治疗组总有效率 94.3%,[WTBX]对照组总有效率74.3%,差异显著（P<0.05）。治疗组高血压合并脑梗死患者神经功能的缺损评分明显降低(P <0.05),Barthel指数评分明显升高(P <0.05)。中西医结合治疗高血压合并脑梗死具有很好的效果。     

基于逼近理想解法的现代配电网成熟度评价

针对目前现代配电网缺乏成熟度量化评价的问题,研究了适用于现代配电网发展成熟度评价的评价指标体系及评价方法。选取2014年已有的评价指标数据和2020年规划评价指标数据作为及格线和满分线,通过一次曲线拟合得到给定样本各项评价指标的分数,并在各项评价指标本身统计学特征参数—标准差和特征值的基础上得到各自可反映各项评价指标价值的变异系数。借助变异系数计算将各个指标赋予相应的权重,保证了评价的客观性。在此基础上运用逼近理想解法计算得出每个样本与正负理想样本之间的距离,借助相对接近度的计算可以直观地体现各地区的排名。以某省5个地区配电网为算例,验证了评价体系能正确客观的评价现代配电网的发展水平,证明了评价体系对于提高配电网的电能质量和提高整体运行水平有着重要意义。     

基于改进HHT和SVM的滚动轴承故障状态识别

针对滚动轴承故障信号特征难以提取与故障诊断效率较低问题,引入集合经验模态分解(EEMD)对Hilbert-Huang变换(HHT)进行改进,将改进的HHT结合拉普拉斯得分(Laplacian score,LS)进行轴承故障特征提取,并利用遗传算法(GA)优化支持向量机(SVM)分类参数,将其应用于滚动轴承振动信号故障状...     

Identification of single nucleotide polymorphisms in the bovine interleukin-12 and interleukin-23 receptor genes and their associations with health and production traits in Holstein cows

Interleukin-12 (IL-12) and interleukin-23 (IL-23) are proinflammatory cytokines produced by macrophages and dendritic cells in response to infection with intracellular pathogens. The IL-12 receptor (IL-12R) is a heterodimer composed of 2 subunits, β1 and β2. The IL-23 receptor (IL-23R) is a heterodimer composed of the IL-12Rβ1 subunit and a unique IL-23R subunit. Given the importance of IL-12 and IL-23 for modulating inflammation and the host immune response, the IL-12 and IL-23 receptor genes may be suitable candidate genes for studying disease resistance in dairy cattle. We hypothesize that single nucleotide polymorphisms (SNP) exist within these genes and that they contribute to variation in health and production traits in dairy cattle. To investigate this, a selective DNA pool was constructed using bull semen based on the estimated breeding values for somatic cell score (SCS), an indicator trait used to achieve genetic improvement for resistance to mastitis. Gene segments were amplified from this pool by PCR and the amplicons were sequenced to reveal SNP. A total of 10 SNP, including 2 in IL-12Rβ1, 5 in IL-12Rβ2, and 3 in IL-23R were identified. The SNP (n = 5) were found in the 5′ untranslated region (UTR) putative promoter regions of the genes, and SNP IL-23R c.1714A > C was a nonsynonymous SNP. Canadian Holstein bulls (n = 492) were genotyped using Sequenom MassARRAY (Sequenom Inc., San Diego, CA). No association was found with SCS based on bull deregressed estimated breeding values for SCS; however, associations of SNP in the IL-12Rβ2 gene (c.-511A > G, c.87A > G, c.2957A > C) were found with milk and protein yield. Further investigation will be required to elucidate the biological and practical relevance of these SNP.     

Combine crossing matching scores with conventional matching scores for bimodal biometrics and face and palmprint recognition experiments

In this paper, we define for the first time the crossing matching score of two biometrics traits and combine it with the conventional matching scores to perform personal authentication. The proposed method is very suitable for the bimodal biometrics systems with two similar biometrics traits such as the system with visible light and infrared face images and the system with palm images captured at two bands. The proposed method first runs for the first and biometrics traits, respectively. For each of these two biometrics traits, the proposed method calculates the matching scores between the testing sample and each training sample. The matching scores generated from the first and second traits are referred to as the first and second matching scores, respectively. Second, the proposed method calculates the crossing matching scores, i.e. the matching scores between the testing sample of the second biometrics trait and the training samples of the first biometrics trait. Finally, we use a weighted fusion scheme to combine the first, second and crossing matching scores for personal authentication.