视差不连续区域和重复纹理区域的误匹配率高一直是影响双目立体匹配测量精度的主要问题,为此,本文提出一种基于多特征融合的立体匹配算法。首先,在代价计算阶段,通过高斯加权法赋予邻域像素点的权值,从而优化绝对差之和(Sum of Absolute...视差不连续区域和重复纹理区域的误匹配率高一直是影响双目立体匹配测量精度的主要问题,为此,本文提出一种基于多特征融合的立体匹配算法。首先,在代价计算阶段,通过高斯加权法赋予邻域像素点的权值,从而优化绝对差之和(Sum of Absolute Differences,SAD)算法的计算精度。接着,基于Census变换改进二进制链码方式,将邻域内像素的平均灰度值与梯度图像的灰度均值相融合,进而建立左右图像对应点的判断依据并优化其编码长度。然后,构建基于十字交叉法与改进的引导滤波器相融合的聚合方法,从而实现视差值再分配,以降低误匹配率。最后,通过赢家通吃(Winner Take All,WTA)算法获取初始视差,并采用左右一致性检测方法及亚像素法提高匹配精度,从而获取最终的视差结果。实验结果表明,在Middlebury数据集的测试中,所提SAD-Census算法的平均非遮挡区域和全部区域的误匹配率为分别为2.67%和5.69%,测量200~900 mm距离的平均误差小于2%;而实际三维测量的最大误差为1.5%。实验结果检验了所提算法的有效性和可靠性。展开更多
Objective:To investigate the diversity of experiences of sadness emotion and physiological responses among female college students with high neuroticism (HN) and low neuroticism (LN) during the late luteal phase (LLP)...Objective:To investigate the diversity of experiences of sadness emotion and physiological responses among female college students with high neuroticism (HN) and low neuroticism (LN) during the late luteal phase (LLP) and early follicular phase (EFP).Methods:Forty-two participants were classified as the HN group and 41 as the LN group based on their neuroticism score (Eysenck Personality Questionnaire Short Scale for Chinese).Participants watched sadness-inducing experimental films during the LLP and EFP.Results:The HN group showed similar sadness intensities in both phases.The LN group showed higher sadness intensity in the LLP than the EFP.The LN group's sadness scale assessments were lower than the HN group in both phases.The blood volume pulse in the HN group fell in both the LLP and EFP (both P <.001).The root mean square standard deviation of NN intervals rose in the EFP in the HN group before and after watching experimental films (P =.027),but fell in the LN group (P >.05).Between-group comparisons showed heart rate was significantly lower in the HN group than the LN group during EFP (P =.009),but there were no statistically significant differences in subjective experience and physiological data during LLP.The HN group had stronger sadness feelings and greater sadness arousal than the LN group during EFP.There were significant associations between menstrual cycle-related changes in sadness ratings and changes in physiological outcomes.Conclusion:Women with HN have less fluctuation in sadness than those with LN during the menstrual cycle,but experience strong sadness feelings in the LLP.Women with HN show stronger physiological responses in the EFP than those with LN,and have the highest responses in the LLP.展开更多
When speaking of Shanghai’s bars, what comes to people’s minds first must be Hengshan Street, a road known for its variety of bars. For many people, Hengshan Street is a landmark. On this street, bars in bold and un...When speaking of Shanghai’s bars, what comes to people’s minds first must be Hengshan Street, a road known for its variety of bars. For many people, Hengshan Street is a landmark. On this street, bars in bold and unrestrained styles appeal to visitors. In fact, the whole street is a large open bar: the hurly-burly of "Hello" permeates every corner of the street; the resonant singing of "Rainbow Potato" echoes in the night sky; the rock’n roll of "Full House" fascinates passers-by with the wildness of John Lennon;展开更多
As a high-grade edible oil tree native in China,tea-oil tree(Camellia oleifera)has the oil-yielded rate of about 55% from its kernel.The recent researches suggested that tea-oil would be one of the best vegetable oils...As a high-grade edible oil tree native in China,tea-oil tree(Camellia oleifera)has the oil-yielded rate of about 55% from its kernel.The recent researches suggested that tea-oil would be one of the best vegetable oils,and even be better than olive oil with its abundant unsaturated fatty acids including 82.6% oleic acid.Stearoyl-ACP desaturase(SAD)is a key enzyme that catalyzes saturated fatty acids(C18∶0)bonded to ACP(Acyl carrier protein)and dehydrogenates the fatty acids into oleic acids,and hence controls the content of oleic acid and the proportion between saturated fatty acids and unsaturated fatty acids.With our previous acquisition of three cDNAs and ESTs of C.oleifera SAD(CoSAD)gene,5’RACE technology was used to obtain the full-length cDNA of CoSAD gene from the nearly matured C.oleifera seed.The comprehensive bioinformatic analyses including sequence characteristics of DNA and amino acid,multi-sequence aligning,identity and homology,molecular clustering,protein physicochemical properties,and protein structural prediction and characteristics were performed.The results may provide the theoretical and material elements for application of CoSAD gene and genetic improvement on other oil plants.展开更多
文摘视差不连续区域和重复纹理区域的误匹配率高一直是影响双目立体匹配测量精度的主要问题,为此,本文提出一种基于多特征融合的立体匹配算法。首先,在代价计算阶段,通过高斯加权法赋予邻域像素点的权值,从而优化绝对差之和(Sum of Absolute Differences,SAD)算法的计算精度。接着,基于Census变换改进二进制链码方式,将邻域内像素的平均灰度值与梯度图像的灰度均值相融合,进而建立左右图像对应点的判断依据并优化其编码长度。然后,构建基于十字交叉法与改进的引导滤波器相融合的聚合方法,从而实现视差值再分配,以降低误匹配率。最后,通过赢家通吃(Winner Take All,WTA)算法获取初始视差,并采用左右一致性检测方法及亚像素法提高匹配精度,从而获取最终的视差结果。实验结果表明,在Middlebury数据集的测试中,所提SAD-Census算法的平均非遮挡区域和全部区域的误匹配率为分别为2.67%和5.69%,测量200~900 mm距离的平均误差小于2%;而实际三维测量的最大误差为1.5%。实验结果检验了所提算法的有效性和可靠性。
基金This study was supported by the National Natural Science Foundation of China(81373771)the National Key Basic Research Development Program(973 Program:2011CB505101).
文摘Objective:To investigate the diversity of experiences of sadness emotion and physiological responses among female college students with high neuroticism (HN) and low neuroticism (LN) during the late luteal phase (LLP) and early follicular phase (EFP).Methods:Forty-two participants were classified as the HN group and 41 as the LN group based on their neuroticism score (Eysenck Personality Questionnaire Short Scale for Chinese).Participants watched sadness-inducing experimental films during the LLP and EFP.Results:The HN group showed similar sadness intensities in both phases.The LN group showed higher sadness intensity in the LLP than the EFP.The LN group's sadness scale assessments were lower than the HN group in both phases.The blood volume pulse in the HN group fell in both the LLP and EFP (both P <.001).The root mean square standard deviation of NN intervals rose in the EFP in the HN group before and after watching experimental films (P =.027),but fell in the LN group (P >.05).Between-group comparisons showed heart rate was significantly lower in the HN group than the LN group during EFP (P =.009),but there were no statistically significant differences in subjective experience and physiological data during LLP.The HN group had stronger sadness feelings and greater sadness arousal than the LN group during EFP.There were significant associations between menstrual cycle-related changes in sadness ratings and changes in physiological outcomes.Conclusion:Women with HN have less fluctuation in sadness than those with LN during the menstrual cycle,but experience strong sadness feelings in the LLP.Women with HN show stronger physiological responses in the EFP than those with LN,and have the highest responses in the LLP.
文摘When speaking of Shanghai’s bars, what comes to people’s minds first must be Hengshan Street, a road known for its variety of bars. For many people, Hengshan Street is a landmark. On this street, bars in bold and unrestrained styles appeal to visitors. In fact, the whole street is a large open bar: the hurly-burly of "Hello" permeates every corner of the street; the resonant singing of "Rainbow Potato" echoes in the night sky; the rock’n roll of "Full House" fascinates passers-by with the wildness of John Lennon;
文摘As a high-grade edible oil tree native in China,tea-oil tree(Camellia oleifera)has the oil-yielded rate of about 55% from its kernel.The recent researches suggested that tea-oil would be one of the best vegetable oils,and even be better than olive oil with its abundant unsaturated fatty acids including 82.6% oleic acid.Stearoyl-ACP desaturase(SAD)is a key enzyme that catalyzes saturated fatty acids(C18∶0)bonded to ACP(Acyl carrier protein)and dehydrogenates the fatty acids into oleic acids,and hence controls the content of oleic acid and the proportion between saturated fatty acids and unsaturated fatty acids.With our previous acquisition of three cDNAs and ESTs of C.oleifera SAD(CoSAD)gene,5’RACE technology was used to obtain the full-length cDNA of CoSAD gene from the nearly matured C.oleifera seed.The comprehensive bioinformatic analyses including sequence characteristics of DNA and amino acid,multi-sequence aligning,identity and homology,molecular clustering,protein physicochemical properties,and protein structural prediction and characteristics were performed.The results may provide the theoretical and material elements for application of CoSAD gene and genetic improvement on other oil plants.
