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Search Results: 1 - 10 of 76669 matches for " 乔鸿海 "
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基于改进特征的图像检索方法研究
Research of Image Retrieval Method Based on Improved Feature

鸿,邓正宏,薛静,宋群
- , 2018,
Abstract: 针对在图像检索过程中,传统单一特征不能较好反映图像的颜色分布和内容细节等相关信息,降低了图像检索性能的问题,提出一种基于改进颜色和纹理综合特征的图像检索方法。根据HSV颜色模型区域均值,利用改进关联权值模型,获取颜色均值特征向量;基于Haar小波进行图像分解变换。在图像的低频分量中,根据低频特征结构模型,获取低频纹理特征向量;通过Canberra距离求取图像相似度。实验结果表明:方法在Corel-1000和Corel-5000标准图库中进行测试,准确率和检索率等性能参数得到了相应提高。
In the process of image retrieval, the traditional single feature can't reflect the distribution and details of image color and content, which have some adverse influence on the performance of image retrieval. This paper presents an image retrieval method based on improved color and texture feature. According to the mean of the HSV color model region, algorithm obtains the mean eigenvectors of the color feature by using the improved correlation weight model. The image decomposition transformation is obtained through the Haar wavelet. In the low-frequency component of the image decomposition, the low-frequency texture feature vector is obtained according to the low-frequency feature structure model. The similarity of image is calculated by the Canberra distance. Experimental results show that:the methods of retrieval are tested in Corel-1000 and Corel-5000 standard gallery, which accuracy rate and retrieval rate have been improved accordingly
近距煤层群上行开采技术研究
张宏伟,韩军,立鑫,李明,鸿
采矿与安全工程学报 , 2013,
Abstract: 针对阜新矿区清河门矿近距离煤层群实施上行开采的技术条件(采动影响系数2.7),综合应用理论分析、数值计算、相似材料模拟和现场探查等方法,对3-2煤采后3-3煤的连续性和完整性进行了研究,确定了下煤层开采后上煤层的结构变化特征,在此基础上确定了3-3煤上行开采巷道布置方案。实践表明,当上煤层位于下煤层开采的垮落带上方时,上煤层及其顶底板整体性遭到一定的破坏,但仍能保持连续性,随着下煤层开采后时间的流逝,煤层中形成的裂隙和断裂逐步“愈合”,煤层的整体性得到改善,满足了开采所需的条件。
L-精氨酸对热应激大鼠胸腺细胞超微结构的影响
张云山,,东仿,吉雁鸿,卢晓翠
中国公共卫生 , 2002, DOI: 10.11847/zgggws2002-18-01-49
Abstract: ?目的探讨热应激对大鼠胸腺细胞超微结构的影响和L-精氨酸(L-Arg)对大鼠胸腺的保护作用.方法观察通过灌胃补充不同浓度L-Arg的SD大鼠在常温和不同高温条件下热应激时胸腺细胞的超微结构变化.结果各组在常温状态下,其胸腺结构基本一致;而在不同温度热应激状态下,各组大鼠胸腺均有不同程度的损伤,补充L-Arg组轻于未补充L-Arg组,低温组轻于高温组,而且胸腺细胞的超微结构变化随热应激后不同时间点而有所不同.结论不同高温热应激均可造成胸腺结构及其细胞的损伤,温度越高损伤越重,足量的L-Arg对热应激大鼠胸腺有较好的保护作用.
化学气相沉积碳化钛的热力学和动力学研究
,舒武炳,生儒,白世鸿,孟国文
材料工程 , 1998,
Abstract: 对采用TiCl4-CH4-H2反应体系化学气相沉积碳化钛的反应热力学和成核热力学因素进行了分析,并在实验的基础上研究了不同沉积温度下化学气相沉积TiC过程的动力学特征,以及在不同的动力学控制机制下气相过饱和度和成核过程对TiC涂层的析出形态的影响。在沉积过程中,气相过饱和度和动力学控制机制是控制沉积物的成核过程和析出形态的决定因素。
信息检索的分类研究
鸿
图书情报工作 , 2004,
Abstract: ?根据不同的检索诉求,将信息检索分为学术型信息检索、休闲型信息检索、实用性信息检索、决策型信息检索和混合检索;分析每种信息检索行为的特点;针对不同的检索目的和特点剖析改进检索效果的关键技术;讨论进一步研究的重点。
电子显微镜研究Pt-Sn/Al2O3催化剂
臧璟龄,鸿,,臧景龄,,林励吾,桂文
催化学报 , 1986,
Abstract: ?
?钩式钻?接手介?
鸿
地质与勘探 , 1959,
Abstract: 自从我院第一地质队使用双轮电动震动器在土层中进行震动钻进以后,不但改变了原来的繁重体力劳动,而且使钻进速度提高很快,每分钟钻进达5公尺左右。这样就使钻?的增接工作赶不上需要,影响了钻进效率。于是我们就试制了一种挂钩式的钻?接手,来代替过去用丝扣连接的接手,从而?少了扭接时间,满足了钻进需要。
中西医结合治疗难治性肾病综合征35例
鸿
中国中医药信息杂志 , 2001,
Abstract:
超短波对糖尿病大鼠溃疡创面碱性成纤维细胞生长因子表达的影响
鸿,张巧俊,,张妮,惠艳娉,吴仲恒,李雅丽,杨峰,张慧
- , 2015,
Abstract: 目的 探讨超短波对糖尿病大鼠溃疡创面局部碱性成纤维细胞生长因子(bFGF)表达的影响,及其与不同时间点糖尿病大鼠创面新生微血管数量、创面病理学改变的相关性。 方法 取健康成年雄性SD大鼠90只,按随机数字表法分为对照组、糖尿病组和治疗组,每组30只。糖尿病组和治疗组大鼠通过腹腔注射链脲佐菌素55mg/kg建立糖尿病模型,90只大鼠采用去除全皮的方法制作皮肤溃疡模型,对照组和糖尿病组大鼠不进行任何干预,治疗组大鼠行超短波治疗。分别于损伤后第3、7、14和21天,取溃疡创面边缘部分组织与中心部分组织常规行苏木精-伊红(HE)染色,并进行新生微血管计数,计算半数愈合时间及痊愈时间,并在光学显微镜下观察创面病理学改变,用免疫组化法检测创面bFGF的表达情况。 结果 ①对照组创面50%愈合时间和100%愈合时间分别为[(8.94±0.87)和(16.56±1.04)d],治疗组创面50%愈合时间和100%愈合时间[(12.78±1.26)d和(23.25±1.54)d]与糖尿病组[(13.72±1.49)和(26.08±2.23)d]比较,明显缩短,且组间差异有统计学意义(P<0.01)。②治疗组微血管计数在伤后第3、7、14和21天分别为(12.5±1.52)、(17.83±1.94)、(23.5±1.876)和(29.33±2.736)个/高倍镜视野,均多于同时间点糖尿病组,且差异均有统计学意义(P<0.01)。③治疗组的bFGF蛋白表达阳性染色指数在伤后第3、7、14和21天分别为(11.83±1.17)、(23.33±1.51)、(55.50±4.09)和(22.50±1.87),均多于同时间点糖尿病组,且差异有统计学意义(P<0.05)。 结论 微热量超短波治疗可增高糖尿病溃疡创面bFGF的表达量,促进创面毛细血管生成,缩短创面愈合时间,加快创面愈合。
Objective To observe the effect of ultrashortwave irradiation on the expression of basic fibroblast growth factor (bFGF) and the growth of new capillaries and pathological changes in wounds affecting diabetics. Methods Ninety healthy, adult, male Sprague-Dawley rats were randomly divided into a control group, a diabetic group and an experimental group, each of 30. A model of diabetes was induced in each rat of the diabetic and experimental groups by intraperitoneal injection of 55 mg/kg of streptozotocin. Skin ulcers were then established by scraping. The experimental group was given ultrashortwave treatment, while the other groups were given no intervention. Three, 7, 14 and 21 days after the injury, tissues at the edge and in the central part of the ulcers were collected and given hematoxylin-eosin staining, and microvessels were counted. Any pathological changes in the ulcers were observed under an optical microscope, and the expression of bFGF was detected using immunohistochemistry. Results In the control group, the 50% and 100% healing times were (8.94±0.87)d and (16.56±1.04)d respectively. The 50% and 100% healing times of the experimental group were (12.78±1.26)d and (23.25±1.54)d-significantly shorter than those of the diabetic group. The average microvessel count of the experimental group rats increased from (12.5±1.52) on day 3 to (17.83±1.94) on day 7 and then to (23.5±1.876) on day 14 and finally to (29.33±2.736) on day 21. Those counts were significantly greater than those of the diabetic group at the same time points. The average index of bFGF expression increased from (11.83±1.17) on day 3, to (23.33±1.51) on day 7 and further to (55.50±4.09) on day 21, and then decreased to (22.50±1.87) on day 21, but always remaining significantly higher than
国际功能、残疾和健康分类在脑卒中后吞咽功能障碍中的临床应用
鸿,张巧俊,,吴仲恒,杨峰,张妮惠,艳娉,李立博,郭方圆
- , 2015,
Abstract: 目的观察国际功能、残疾和健康分类(ICF)60条吞咽障碍核心条目在临床脑卒中后吞咽功能障碍评定和治疗中的作用。 方法选取脑卒中后吞咽功能障碍患者60例,按随机数字表法分为ICF组和对照组,每组30例。ICF组患者于收治后即开始Threats 60条吞咽障碍核心条目评定,对照组患者则进行康复医学科常规吞咽功能障碍评定。评定结束后,2组患者均进行吞咽功能障碍常规康复治疗,ICF组患者在此基础上,依据ICF评估时发现的功能障碍给予相应的干预。2组患者均于治疗前、治疗4周和8周后进行洼田饮水试验分级评定,并于评估结束后行表面肌电图(sEMG)检查。 结果治疗4周和8周后,ICF组的洼田饮水试验分级分别为(2.56±0.76)级和(1.46±0.32)级,分别与组内治疗前和对照组治疗后同时间点比较,差异均有统计学意义P<0.05);治疗4周和8周后,2组患者各肌群的吞咽时程和募集最大振幅较组内治疗前均显著改善(P<0.05),且ICF组各肌群的吞咽时程和募集最大振幅均显著优于对照组同时间点,差异均有统计学意义(P<0.05)。 结论在常规吞咽功能障碍治疗的基础上,根据ICF Threats 60条吞咽障碍核心条目的评定结果对脑卒中后吞咽功能障碍患者进行有针对性的干预,可显著改善吞咽障碍患者的洼田饮水试验分级以及各肌群吞咽时程和募集最大振幅。
Objective To test the utility of applying the 60 core items of the International Classification of Functioning, Disability and Health (ICF) to patients with dysphagia after stroke. MethodsSixty dysphagic stroke survivors were randomly divided into an ICF group and a control group, each of 30. The ICF group was evaluated using the Threats 60 items core sets of the ICF, while the control group was assessed traditionally. Both groups were then given conventional rehabilitation training, but the ICF group was given additional intervention according to the evaluation results. Right after the treatment and four and eight weeks later, Kubota Toshio′s drinking tests and surface electromyography (sEMG) were performed for both groups. Results The average grade in Kubota Toshio′s drinking test fell from (2.56±0.76) after 4 weeks′ treatment to (1.46±0.32) after 8 weeks of treatment in the ICF group. Both averages were significantly higher than before treatment and significantly higher than the control group′s averages at the same time points. After 4 and 8 weeks of treatment, the duration of swallows and the maximum amplitude of the related muscles were also significantly improved compared with before treatment. The average swallow duration in the ICF group was significantly shorter than that in the control group, and the maximum amplitude was significantly greater. Conclusion In addition to conventional treatment, targeted intervention based on evaluation using the Threats 60 core items of the ICF can significantly improve swallowing for stroke survivors with dysphagia
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