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两种基于灰度相似性测度的超声波图像配准方法的比较
高爽,肖扬
中国图象图形学报 , 2006, DOI: 10.11834/jig.20060354
Abstract: 图像配准是图像分析和处理的基本问题,其在医学影像分析、遥感遥测、计算机视觉等领域有着广泛的应用。为了能稳定、准确地进行超声波图像配准,基于灰度信息的提取、变换,提出了以下两种基于灰度相似性测度的超声波图像配准方法:第1种方法是利用Harris角点检测方法提取特征点,然后由特征点提供灰度信息,其配准中的相似性测度定义为一个评价函数(cost-function)。误差评价函数;第2种方法引用了相同的评价函数,但使用的有关唯一性控制和区域对应规则是与第1种方法不同的。在给定了相似性测度的情况下,参数化的超声波图像配准可以表述为最小化的问题。第1种方法还利用多项式映射的方法来变换整幅图像,并估计了其平方和误差。实验的结果表明,这两种算法都很稳定,且合乎图像配准的要求,仅仅是第2种方法比第1种方法的性能要好一些。
基于聚类分析的风电场短期功率预测方法研究
The Study of Short-Term Wind Power Generation Prediction Methods Based on Clustering Analysis in Wind Farm
 [PDF]

董存, 高爽, 郝颖, 高阳
Sustainable Energy (SE) , 2015, DOI: 10.12677/SE.2015.53003
Abstract:
为了充分利用历史风速数据所蕴含的信息,本文根据风速和风电功率的日相似性提出基于聚类分析的短期功率预测方法,通过对原样本数据进行预处理,选取与预测日NWP特征参数相似的历史日数据,以此作为建立模型的训练样本,将气象部门提供预测日的NWP信息作为预测日的特征参数,计算特征参数间的欧式距离,以此作为相似性度量的依据,最后利用聚类后的相似样本建立预测模型,以NWP数据为输入参数,实际风电功率为目标值,经过训练后得到聚类风电功率短期预测模型。经实际风电场测试,预测精度明显提高。
In order to make full use of information contained from historical wind data, this paper proposed a short-term power prediction method based on clustering analysis according to the daily similarity property of wind speed and wind power. By the preprocessing of the original sample data, when calculating the Euclidean distance among the characteristic parameters, the history data which are similar to the NWP characteristic parameter of the prediction day are used as the training sample; the NWP information provided by the meteorological department is used as the characteristic parameter of the prediction day. This Euclidean distance is used to be the basis of the similarity measure. Finally, this paper uses the similar samples after clustering to establish the short-term prediction model which is using the NWP data as the input parameter, using the actual wind power generation as the target data. Testing by the actual wind farms, the prediction precision is improved obviously.
反应控制相转移催化研究的进展
高爽,李军
催化学报 , 2010, DOI: 10.3724/SP.J.1088.2010.00450
Abstract: ?反应控制相转移催化是近年来发展起来的一类新的催化体系.??该催化体系在反应过程中具有均相催化的本征,?当反应结束后,?催化剂发生相的变化而从反应介质中析出,?从而可实现催化剂的分离和循环使用.??本文就反应控制相转移催化原理及其在烯烃环氧化、醇氧化、烯烃断键氧化、苯羟基化、硒催化羰基化和酯化反应等方面应用的最新进展进行了综述.?
中国生育率转变中的数量和进度效应
陈卫,高爽
人口研究 , 2013,
Abstract: ?通过对总和生育率、去进度效应总和生育率及内在总和生育率的对比分析,对中国生育率转变过程中生育行为的结构进行剖析,对生育的数量效应、进度效应在生育率变动中的各自的作用进行定量分解。内在总和生育率在估计时期生育水平上,是比总和生育率和去进度效应总和生育率更好的指标,能够更准确测量生育的进度效应。结果表明1970年代我国生育率下降中的数量效应占比远超进度效应,达到3/4;1980年代数量效应的比例也达到2/3;1990年代,数量效应作用比例为略高于50%;而2000年以来数量效应和进度效应的作用此消彼长,总体而言,数量效应不足50%。1970年代,进度效应使总和生育率下降0.2~0.4;1980年代,进度效应很小;而1990年代以来,进度效应使总和生育率下降0.1~0.2。
A Comparison of Two Similarity Measures in Intensity-based Ultrasound Image Registration
两种基于灰度相似性测度的超声波图像配准方法的比较

GAO Shuang,XIAO Yang,
高爽
,肖扬

中国图象图形学报 , 2006,
Abstract: Image registration is a basic problem during image analysis and image processing. Image registration has been widely applied in the fields of medical image, remote sensing and computer vision. This paper investigates two registration methods for ultrasound image relying on the intensity-based similarity measure. In tiw first method intensity information is provided by feature points which have been extracted using Harris corner detector. The registration similarity measure is then defined as a cost-function-error cost function. In the latter method the same cost-function is employed, but uniqueness control and region correspondence are different from the first method. Given this similarity measure, parametric ultrasound image registration is stated as a minimization issue. The experiment even exploits polynomial technique to transform the whole image dataset and estimates the sum of square error in the first method. Image quality is one of the most important issues in ultrasound imaging. Ultrasound images tend to be noisy due to the presence of speckle. Speckle originates from the constructive-destructive interference of the ultrasound pulses, and is produced to some extent by all ultrasound machines. This paper shows that it is possible to perform accurate registration on data from in-vivo examinations. The result indicates that the two methods are robust and meet our requirements, but the latter outperforms the first one. It can match B-scans and areas with certain angel, severe deformation and even with plus noise.
反应控制相转移催化液相丙烯环氧化工艺研究
Study on the Process of Epoxidation of Liquid Propylene by Reaction-Controlled Phase Transfer Catalyst
 [PDF]

黄方方, 齐永红, 沈寒晰, 高爽, 史李刚, 景艳妮
Studies in Synthetic Chemistry (SSC) , 2015, DOI: 10.12677/SSC.2015.32006
Abstract:
在含有反应控制相转移催化剂及H2O2的均相有机体系中,以H2O2为氧源,研究反应控制相转移催化液体丙烯(PP)环氧化制备环氧丙烷(PO)的反应过程,考察了反应温度、反应时间、原料配比、H2O2浓度对反应的影响;并进行了反应条件下H2O2的稳定性考察及反应过程中催化剂相变规律的探讨,在此基础上初步进行反应动力学探索。结果表明:反应速率随温度的升高而增加,但综合考虑H2O2的分解因素,以60℃为最佳,反应时间控制在100 min左右为宜,最佳原料配比( (摩尔比))为3:1,催化剂的催化性能与其相变状况密切相关,催化剂加量为0.3%时,H2O2浓度以1.8~2.2 mmol/g为宜;根据反应平衡建立了反应动力学速率方程,并通过matlab编程,确定了丙烯环氧化反应的反应级数及速率常数。
When using aqueous hydrogen peroxide as oxidant, the process of the reaction of the liquid pro-pylene epoxidation by reaction-controlled phase transfer catalyst was studied in the organic sol-vent including reaction-controlled phase transfer catalyst and H2O2; the effects of reaction tem-perature, the ratio of raw materials, reaction time and H2O2 concentration on the epoxidation were investigated. Under the reaction condition, the stability of H2O2 and the phase transforma-tion of the catalyst were also researched. On the basis, the reaction kinetics was explored preli-minarily. The results showed that the reaction rate increased with increasing temperature; the optimal reaction temperature was 60?C considering the factor of H2O2 decomposition; the reaction time can be controlled at about 100 min; the mole rate of raw material ( (mole)) was 3:1; the catalytic activity was closely related to its phase transition; when the dosage of catalyst was 0.3%, the concentration of H2O2 in 1.8 - 2.2 mmol/g was appropriate. The reaction rate equation was established according to the reaction equilibrium. The order and the rate constant of reaction of epoxy propane were calculated using the MATLAB program.
基于多位置NWP与主成分分析的风电功率短期预测
王丽婕,冬雷,高爽
电工技术学报 , 2015,
Abstract: 数值天气预报(NWP)信息对风电功率短期预测模型的准确性起着重要作用。考虑风电场周围多个位置的NWP信息,提出聚类分析与主成分分析相结合的方法对风力发电功率短期预测进行研究。通过聚类分析提取历史数据中与预测日NWP最相近的样本,然后用主成分分析法对样本日信息进行处理,获得更加准确反映风电场特性的参数。通过对依兰风电场的发电功率进行预测,证实了该方法的有效性,其准确度比基于单位置NWP的预测模型提高了4.65%。
磷钨杂多酸盐催化的氯丙烯水油两相条件下的环氧化
李健,奚祖威,高爽
分子催化 , 2006,
Abstract: 研究了磷钨杂多酸盐对氯丙烯与H2O2水溶液两相条件下环氧化反应的催化活性.反应结果表明,环氧氯丙烷的产率受溶剂二氯乙烷量影响;二氯乙烷作溶剂时,这一反应体系具有很好的催化性能,环氧氯丙烷产率可达88.3%;甲苯不是氯丙烯环氧化的优良溶剂.
改革开放30年图书馆学基础理论研究回顾与思考
柯平,赵益民,高爽
中国图书馆学报 , 2008,
Abstract: 近三十年来,我国图书馆学基础理论研究的发展可以归纳为一次对经验描述的历史传承和两次关于研究范式及研究重心的重大转折。图书馆学理论创新集中体现在关于研究客体的认识和图书馆活动主体的自省两大方面。但是与此同时,图书馆学基础理论的研究中还存在理论脱离实际、实证研究方法不足和缺乏学派研究模式等缺陷,未来还需要继续鼓励学科争鸣、拓展国际化研究视野、加强理论与实践的结合、保障人文与科学并重。表1。图1。参考文献27。
基于粗糙集理论的中长期风速预测
高爽,冬雷,高阳,廖晓钟
中国电机工程学报 , 2012,
Abstract: 在中长期风速预测中,正确处理相关因素的影响是提高风速预测精度的关键。该文提出一种粗糙集理论预测方法。利用粗糙集理论分析出风速预测的主要影响因素,将其作为中长期风速预测模型的附加输入,建立粗糙集神经网络预测模型。利用黑龙江某风电场的数据进行训练和预测,并将预测结果与单纯的混沌神经网络预测方法和持续模型方法进行对比,结果表明,粗糙集神经网络模型的预测精度最高。粗糙集方法在中长期风速预测中将是一个有用的工具。
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