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Search Results: 1 - 10 of 140377 matches for " 杨雪 "
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一种基于多种特征组合的烟雾检测方法
A Method of Smoke Detection Based on Various Features Combination
 [PDF]

,
Computer Science and Application (CSA) , 2013, DOI: 10.12677/CSA.2013.35041
Abstract:
视频中类似烟雾的区域很大程度上增加了烟雾检测的误差,为了提高烟雾检测的准确性,利用BP神经网络分类器,一种基于小波特征、烟雾纹理特征以及Y分量均值特征相结合的烟雾检测方法被提出。首先对视频序列进行运动区域提取;然后对疑似区域提取小波特征、纹理特征以及Y分量均值特征,形成一种新的多特征组合向量;最后将特征向量输入到BP神经网络分类器进行检测。实验表明,通过这种组合特征的方法,检测结果更有效。
Smoke-like regions greatly increase smoke detection errors in the video. In order to improve the accuracy of smoke detection, a smoke detection method based on BP neural network is proposed, combining the wavelet feature, smoke texture feature and mean of Y component pixel value. Firstly, moving regions in the video sequences are ex- tracted; secondly, the wavelet feature and texture feature of suspected regions are extracted, then a new kind of multi-feature vector is formed. Finally, feature vector is input into the BP neural network classifier for smoke detection. The experiments show that smoke detection results are more effective by combing various features.
简单初测辉钼矿Re-Os年龄新方法

地质学报 , 2015,
Abstract:
单螺杆挤压蒸煮技术的发展现状

食品科学 , 1997,
Abstract: ?主要阐述了当今单螺杆挤压领域的研究进展,包括理化特性、流变特性、挤出理论、膨化特性方面研究,并着眼于碳水化合物的挤压加工上。
梯度聚氨酯吸声性能的优化

武汉理工大学学报 , 2006,
Abstract: ?梯度聚氨酯能够吸收宽带声波,通过大量反复试验测量来优化设计梯度聚氨酯各层材料厚度既费时又费力。因此主要从理论上优化梯度聚氨酯各层材料厚度,使其具有最佳吸声性能。制备了梯度聚氨酯,并在声管中测试其水声吸声系数。用传递矩阵法计算其吸声系数,结果表明计算结果与试验结果一致,由此证明应用传递矩阵法计算梯度聚氨酯吸声系数是合理的。然后根据此数学模型,应用matlab编辑遗传算法程序优化梯度聚氨酯各层材料厚度。
用于生命特征信号识别的模拟系统研制
Simulating System Development for the Study of Life Characteristic Signal
 [PDF]

鸿, 淑华
Journal of Sensor Technology and Application (JSTA) , 2015, DOI: 10.12677/JSTA.2015.33010
Abstract: 在生命特征信号处理的研究中,由于人体状态、姿势及位置等的不同,使得其研究结果产生了很大差异。因此,本文设计了一种基于生物雷达监测系统的用于生命特征信号研究的模拟系统。该系统为生命特征信号的处理研究提供了定量稳定的目标信号,并且其信号频率、幅度等参数连续可调。本系统通过模拟人体的心肺运动,实现了非接触式生命探测实验。通过不同条件下对模拟系统的实验测试,实验结果证明了在不同工况下,该系统具有更好的信噪比,且系统是全局稳定的,提高了系统的实用性。
In the research of life characteristic signal processing, because of different status, postures and positions, the results produce huge difference. Therefore, this paper designs a monitoring system which is based on biological radar simulation system, and it could be used in the study of life cha-racteristic signal. The system provides target signals with stable quantitation for the research of life characteristic signal processing, and the signal parameters such as frequency, amplitude are adjustable. The system realizes the non-contact life detecting experiment through simulating the cardio of human. Through the test of the simulation system under different conditions, the expe-rimental results prove that under different conditions, the system has better SNR and is globally stable, improving the practicability.

大学新生幽默感和适应性的相关研究
A Research on the Correlation of Humor and Adaptability in University Freshmen
 [PDF]

, 尹天子, 傅丽萍
Advances in Psychology (AP) , 2016, DOI: 10.12677/AP.2016.61006
Abstract:
本研究采用多向度幽默感量表和中国大学生适应量表,对320名大学新生进行调查。目的在于研究当代大学新生幽默感和适应性的现状特点以及两者之间的关系。研究结果表明:(1) 在幽默感的笑的倾向维度上女生得分显著高于男生;在幽默理解维度上城镇大学新生得分显著高于农村大学新生;在社交幽默维度、幽默理解维度及总平均分上,独生子女得分显著高于非独生子女得分;(2) 在人际关系适应、校园生活适应、择业适应、满意度维度及总平均分上,城镇大学新生显著高于农村大学新生;在人际关系适应维度、校园适应维度、择业适应维度、情绪适应维度、满意度维度和总平均分上,独生子女明显高于非独生子女;在择业适应维度上女生得分显著高于男生;在择业适应得分上文科学生明显高于理科学生;(3) 经相关分析,幽默感和适应性之间存在显著的正相关,幽默感对适应性有正向的预测意义。
Humor Scale and the Adaption Scale of China University Students were used to investigate 320 freshmen in this study. The aim was to explore the status quo and characteristics of university freshmen in a sense of humor and adaptability, and the relationship between those of them. The results showed that: (1) with respect to the sense of humor, the girls’ score was significantly higher than boys’ in the tendency of laugh dimensions; the score of the urban freshmen was significantly higher than that of the rural freshmen in humor understand dimension; the score of the one-child fresh-men was higher than that of the non-one-child freshmen in social and humor understand dimensions and the total average; (2) with respect to the adaptability, the score of urban freshmen was significantly higher than that of rural freshmen in interpersonal adaptation, campus adaptation, career choice adaptation and satisfaction dimensions, as well as the total scores of adaptability; and the score of the one-child freshmen was significantly higher than the that of the non-child freshmen in interpersonal adaptation, campus adaptation, career choice adaptation and satisfaction emotional adjustment adaptation dimensions and the total score; girls’ score was significantly higher than boys’ in career adaptation; the liberal arts students’ score was significantly higher than science students’ in career choose adaptation; (3) according to the correlation analysis, there was a significant positive correlation between the sense of humor and adaptation, and a sense of humor is a positive predictor for adaptability.
云南莠竹属一新种
彭华,
植物分类学报 , 1996,
Abstract: 一年生草本。秆细弱,光滑,下部匍匐,节处生根,分枝较多,上部直立,高20~50 cm。叶鞘草质,稍膨胀,草绿色至紫色,光滑,有条纹;叶舌短,长约 0.8 mm,顶端无缘毛;叶片
高温对贻贝幼苗影响的初步探讨

海洋科学 , 1982,
Abstract: 中国科学院海洋研究所在1958年试验证明:不同温度对贻贝Mytilus edulis L.附着的影响是不同的;在12小时内,个体的附着力随着温度的升高而下降,个体越大,附着力下降的越早越快。这与胚胎及幼体发育要求的温度范围通常比成体严格面狭窄的规律相反,在10℃—25℃范围内,贻贝幼虫的生长发育和足丝的分泌能力都随温度的上升而加
结合实体链接与实体聚类的命名实体消歧
谭咏梅,
北京邮电大学学报 , 2014, DOI: 10.13190/j.jbupt.2014.05.008
Abstract: 为了消除文本中命名实体的歧义,提出了一种结合实体链接与实体聚类的命名实体消歧算法,结合2种方法,可弥补单独使用其中一种方法的局限.该算法在背景文本中将待消歧实体指称扩充为全称,使用扩充后的全称在英文维基百科知识库中生成候选实体集合,同时提取多种特征对候选实体集合进行排序,对于知识库中没有对应实体的指称使用聚类消歧.实验结果表明,该算法在KBP2011评测数据上的F值为0.746,在KBP2012评测数据上的F值为0.670.
北京市耕地功能空间差异及其演变
,谈明洪
地理研究 , 2014, DOI: 10.11821/dlyj201406011
Abstract: 城市化对耕地及其功能具有深刻影响,这在大都市郊区尤为明显。立足北京市,构建耕地功能评价指标体系,运用极差标准化法处理数据,采用层次分析法确定指标权重,最后运用加权求和法得出功能值。研究表明①在北京各区县,2004-2011年间单位面积耕地的生产、生态、文化和社会功能几乎均增强,空间差异表现为生产和社会功能远郊平原区高于远郊山区和近郊区,生态功能远郊平原区高于远郊山区,文化功能近郊区高于远郊区。②北京远郊平原区的粮食、蔬菜和瓜类生产功能均较强,但农业污染较严重。受距市中心距离影响,近郊区耕地文化功能需求量较大,远郊区供给量较大。③2004-2011年间绝大部分区县单位面积耕地的总功能增强,受地形和市中心经济辐射影响,远郊平原区高于远郊山区和近郊区。④根据耕地总功能组成比重,把北京市耕地分为四种类型生产型(远郊平原区)、生态型(近郊区)、文化型(丰台区和门头沟区)与社会型(远郊山区).
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