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光学针描法表面粗糙度测量及其关键技术处理 被引量:2
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作者 刘剑飞 鲍振武 +1 位作者 金杰 苏寒松 《河北工业大学学报》 CAS 2001年第2期1-5,共5页
介绍了一种基于光纤传感技术的光学针描法粗糙度测量技术.它根据微观表面轮廓对光信号的调制原理,采用计算机技术进行测量控制、数据采集与处理,从而实现对表面粗糙度各常用参数的测量,并给出被测表面的轮廓图形.文中对有关测量原... 介绍了一种基于光纤传感技术的光学针描法粗糙度测量技术.它根据微观表面轮廓对光信号的调制原理,采用计算机技术进行测量控制、数据采集与处理,从而实现对表面粗糙度各常用参数的测量,并给出被测表面的轮廓图形.文中对有关测量原理及其关键技术进行了介绍,给出了实验结果及误差分析. 展开更多
关键词 表面粗糙度测量 单模光纤探 轮廓调制 峰值检测 光学针描法
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光学针描法的理论与实验研究 被引量:2
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作者 鲍振武 刘剑飞 +1 位作者 霍洪涛 刘钊 《光学学报》 EI CAS CSCD 北大核心 1999年第11期1523-1529,共7页
在光纤探针扫描使表面轮廓对光产生调制原理的基础上提出了光学针描法的粗糙度测量技术。对光学针描法的理论基础, 如表面轮廓调制原理和光耦合区理论进行了较为深入的分析。对单模光纤探针式轮廓仪的实验系统进行了介绍, 最后给出了... 在光纤探针扫描使表面轮廓对光产生调制原理的基础上提出了光学针描法的粗糙度测量技术。对光学针描法的理论基础, 如表面轮廓调制原理和光耦合区理论进行了较为深入的分析。对单模光纤探针式轮廓仪的实验系统进行了介绍, 最后给出了实验结果和误差分析。 展开更多
关键词 粗糙度测量 光学针描法 光纤探 轮廓调制
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光纤探针粗糙度测量原理的探讨 被引量:3
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作者 鲍振武 孙俊卿 《光纤与电缆及其应用技术》 北大核心 1995年第6期7-10,14,共5页
本文利用光纤传感技术提出了粗糙度测量的一种新原理——“光纤探针”针描法粗糙度测量原理.文中给出了基本理论分析和初步实验结果.
关键词 粗糙度 针描法 光纤探 测量
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断口真实表面积测量方法及其误差的估计
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作者 冯凯 李秉德 +1 位作者 于杰 刘宝林 《实验技术与管理》 CAS 1991年第4期14-18,共5页
本文根据电动测量原理、体视学理论以及计算机技术,研究了断口真实表面积的测量方法——触针测描法和喷镀法,并根据误差理论,采用由断口表面粗糙度测量计算断口真实表面积值,与上述方法所得值进行对比,估计其误差。
关键词 断口 面积 测量 误差
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前混合水射流喷丸表面粗糙度的试验研究 被引量:12
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作者 董星 王瑞红 段雄 《煤炭学报》 EI CAS CSCD 北大核心 2009年第10期1410-1415,共6页
选择喷丸压力、喷嘴扫描速度、靶距为影响因素,选用直径为0.25mm的玻璃弹丸,应用前混合水射流对45钢和2Al1铝合金材料进行喷丸试验;采用针描法测量喷丸表面粗糙度,利用扫描电镜观察喷丸表面宏观形貌特征.结果表明,前混合水射流喷丸会使... 选择喷丸压力、喷嘴扫描速度、靶距为影响因素,选用直径为0.25mm的玻璃弹丸,应用前混合水射流对45钢和2Al1铝合金材料进行喷丸试验;采用针描法测量喷丸表面粗糙度,利用扫描电镜观察喷丸表面宏观形貌特征.结果表明,前混合水射流喷丸会使受喷材料的表面粗糙度明显增大,且表面粗糙度随着喷丸压力的增加而增大,随着扫描速度的增加而减小,并存在最大表面粗糙度靶距;在整个喷丸表面上出现宽度近似相等的"垄沟"状条形变形带,并布满了无数个形状不规则的无间隙的冲击凹坑,粗糙度曲线呈现"锯齿"形状,它与喷丸表面"垄沟"状形貌特征十分吻合. 展开更多
关键词 水射流 喷丸强化 表面粗糙度 针描法 表面形貌
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表面粗糙度测量仪的工作原理分析及其改进方案 被引量:8
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作者 杨旭东 《贵州工业大学学报(自然科学版)》 CAS 2001年第1期45-48,共4页
分析了传统表面粗糙度测量仪的基本原理 ,对采用计算机系统的改进方案进行了讨论 ,并指出其发展方向。
关键词 表面粗糙度 测量仪 计算机系统 针描法
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基于流场纹理表达与表面粗糙度测量的运动目标分割
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作者 张旭光 贺海明 +1 位作者 苏连成 李小俚 《燕山大学学报》 CAS 2013年第4期353-357,共5页
针对传统的光流法和背景差法所分割的运动目标存在区域丢失和内部孔洞的缺点,本文提出一种基于流场纹理表达及物体表面粗糙度测量的运动目标分割方法,即通过计算相邻帧间的光流将目标运动表达成流体的流动,并利用线积分卷积来表达流场... 针对传统的光流法和背景差法所分割的运动目标存在区域丢失和内部孔洞的缺点,本文提出一种基于流场纹理表达及物体表面粗糙度测量的运动目标分割方法,即通过计算相邻帧间的光流将目标运动表达成流体的流动,并利用线积分卷积来表达流场纹理以展示更多的流场细节,从而将背景图像和运动目标分别表达成不同的纹理,最后通过针描法测量物体表面粗糙度的策略将运动目标和背景的纹理图像映射为表面粗糙度不同的物体,并通过分析直方图确定阈值分割运动目标。实验结果表明,本文提出的运动目标分割方法可自适应地选取阈值,并且可克服内部孔洞。 展开更多
关键词 运动目标分割 光流场 线积分卷积 表面粗糙度测量 针描法
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金属断口几何量的测量
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作者 冯凯 徐雁 +1 位作者 洪班德 于杰 《哈尔滨科学技术大学学报》 1991年第2期47-52,共6页
本文将 Talysurf 6型表面形貌测量系统应用于金属断口的几何量测量中.在该系统上采用针描法测量金属断口表面,得到代表断口表面轮廓的模拟信号,应用计算机,计算断口表面的高度参数.根据体视学原理。对大量数据进行处理,获得金属断口的... 本文将 Talysurf 6型表面形貌测量系统应用于金属断口的几何量测量中.在该系统上采用针描法测量金属断口表面,得到代表断口表面轮廓的模拟信号,应用计算机,计算断口表面的高度参数.根据体视学原理。对大量数据进行处理,获得金属断口的真实表面积.这种方法比定量金相法中估计 K 值求真实表面积的方法更为科学、合理.因此,针描法可以做为断口定量分析的一种有效方法. 展开更多
关键词 金属断口 表面积 测量 针描法
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微小型钢球表面粗糙度测量仪的研究与设计 被引量:1
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作者 姚灵 《传感器世界》 1998年第7期32-37,共6页
本文介绍了一种新研制成功的用于测量微小型超精成品钢球(G3-G60)表面粗糙度的测量仪器.仪器的设计采用M制轮廓针描法.由于设计中采用了特殊结构的高灵敏度触针式压电传感器和极低自振量的旋转式电动驱动机构,使仪器的“虚假信号”降至0... 本文介绍了一种新研制成功的用于测量微小型超精成品钢球(G3-G60)表面粗糙度的测量仪器.仪器的设计采用M制轮廓针描法.由于设计中采用了特殊结构的高灵敏度触针式压电传感器和极低自振量的旋转式电动驱动机构,使仪器的“虚假信号”降至0.002~0.003μm(Ra),仪器示值度动量达到了0.001~0.002μm(Ra)水平. 展开更多
关键词 钢球 M制轮廓针描法 表面粗糙度 测量
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Treatment of Decortical State of Child Encephalitis with Scalp Acupuncture and the Effects on EEG and BEAM
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作者 于澎 孙领娣 +1 位作者 林淑静 王友京 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 2000年第4期289-292,共4页
Electroencephalogram (EEG)-recorded rhythmicelectrophysiologic activity of brain is synchronoussynthesis of postsynaptic potentials of pyramidalcells and their parietal dendrites of the cerebralcortex.Abnormal changes... Electroencephalogram (EEG)-recorded rhythmicelectrophysiologic activity of brain is synchronoussynthesis of postsynaptic potentials of pyramidalcells and their parietal dendrites of the cerebralcortex.Abnormal changes in EEG and brainelectrical activity mapping (BEAM) appear prior tothat in computed tomography (CT) and nuclearmagnetic resonance (NMR) during the acute stage ofencephalitis,providing a scientific and 展开更多
关键词 Brain Mapping ELECTROENCEPHALOGRAPHY Acupuncture Therapy Child Preschool Decerebrate State ENCEPHALITIS Humans Male SCALP
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Effects of electroacupuncture of different frequencies on electromyography,NOS and ICC of colon in rats with slow transit constipation 被引量:4
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作者 Liu Bo-xin Zhao Bo +9 位作者 Gao Fei Liu Yan-li Li Xiao-feng Zhang Shen Zhang Hui-zhen Liang Yu-lei Zhang Xuan-ping Sun Yan-hui Jia Chun-sheng Yang Yan-ping 《Journal of Acupuncture and Tuina Science》 CSCD 2020年第1期10-15,共6页
Objective:To observe the effects of electroacupuncture(EA)of different frequencies on transmission function,electromyography,nitric oxide synthase(NOS)content and interstitial cells of Cajal(ICC)expression of colon in... Objective:To observe the effects of electroacupuncture(EA)of different frequencies on transmission function,electromyography,nitric oxide synthase(NOS)content and interstitial cells of Cajal(ICC)expression of colon in rat models with slow transit constipation(STC).Methods:Of the 50 healthy male Wistar rats,10 were randomly selected as a normal group and fed with ordinary diet,and the remaining 40 rats were fed with the diet added with the compound diphenoxylate at a dose of 8 mg/(kg·bw)each day for continuous 120 d.The 40 successfully established STC rat models were randomly divided into a model group,a low-frequency EA group(2 Hz),a high-frequency EA group(100 Hz),and a variable-frequency EA group(2 Hz/100 Hz),with 10 rats in each group.Rats in the normal and the model groups were not given any treatment;the low-frequency EA and the high-frequency EA groups were given EA at Tianshu(ST 25),Zusanli(ST 36)and Zhigou(TE 6)with continuous wave at the designated frequency,and the variable-frequency EA group received sparse-dense wave(2 Hz/100 Hz)EA at the same acupoints,once a day for a total of 15 d.After treatment,the colonic transmission function,electromyography,NOS content and ICC expression(calculated by the difference in the area of the C-kit positive cells)of the rats in each group were measured.Results:For the colonic transmission function,compared with the normal group,the first black stool excretion durations of rats in the other groups were significantly prolonged(all P<0.05);compared with the model group,the first black stool excretion durations of rats in the three EA groups were significantly shortened(all P<0.05),which was significantly shorter in the variable-frequency EA group than in the low-frequency EA and high-frequency EA groups(both P<0.05).For the colonic electromyography,compared with the normal group,the amplitude was significantly increased and the frequency was accelerated in rats of the other groups(all P<0.05);compared with the model group,the amplitude was significantly reduced and the frequency was slowed down in the three EA groups(both P<0.05);compared with the low-frequency EA and the high-frequency EA groups,the amplitude was reduced and the frequency was significantly reduced in rats of the variable-frequency EA group(both P<0.05).Compared with the normal group,the colonic NOS contents were significantly increased in the other groups(all P<0.05);compared with the model group,the NOS contents were significantly reduced in the three EA groups(all P<0.05);compared with the low-frequency EA and the high-frequency EA groups,the content was significantly reduced in the variable-frequency EA group(all P<0.05).For the area of rat colonic C-kit-positive cells,compared with the normal group,the areas were significantly reduced in rats of other groups(all P<0.05);compared with the model group,the areas were increased significantly in the three EA groups(all P<0.05);compared with the low-frequency EA group,the area was increased significantly in the variable-frequency EA group(P<0.05).Conclusion:EA,especially EA at the 2 Hz/100 Hz variable-frequency,has a positive treatment effect on the STC model rats.It may improve rats'colonic function by regulating the electromyography,NOS content and ICC expression of colon. 展开更多
关键词 Acupuncture Therapy ELECTROACUPUNCTURE CONSTIPATION ELECTROMYOGRAPHY Nitric Oxide Synthase COLON RATS
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Clinical study on tube moxibustion plus point-toward-point needling method in treating refractory facial paralysis 被引量:1
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作者 XIONG Zhonghao ZHOU Xi +2 位作者 SONG Na TIAN Fengwei ZHANG Fuqing 《Journal of Acupuncture and Tuina Science》 CSCD 2022年第5期399-405,共7页
Objective To evaluate the clinical efficacy of tube moxibustion plus point-toward-point needling method for refractory facial paralysis.Methods A total of 100 patients with refractory facial paralysis who met the incl... Objective To evaluate the clinical efficacy of tube moxibustion plus point-toward-point needling method for refractory facial paralysis.Methods A total of 100 patients with refractory facial paralysis who met the inclusion criteria were randomized into an observation group and a control group,with 50 cases in each group.Both groups were treated with acupuncture by point-toward-point needling method,mainly in the affected eye,cheek and mouth areas.The observation group was given additional tube moxibustion after receiving the point-toward-point needling method,which inserted a tube moxibustion device into the external acoustic meatus 1 cm on the affected side for 20 min.Both groups were treated once a day,6 times a week,for 4 consecutive weeks.The House-Brackmann scale was scored before and after treatment,and the facial nerve electromyogram data were collected.Results The total effective rate of the observation group was 93.6%,which was higher than 64.6%of the control group,and the difference between the two groups was statistically significant(P<0.05).The proportion of new-onset facial paralysis complications(facial synkinesis,facial spasm,facial paralysis perversion,and crocodile tears)in the observation group was 6.4%,which was lower than 35.4%in the control group.The difference between the two groups was statistically significant(P<0.05).In the observation group,the numbers of cases after treatment with the ratio of action potential amplitude between the affected side and the healthy side increased by 10%–30%and over 30%were more than those in the control group.And the difference between the two groups was statistically significant(P<0.05).Conclusion Tube moxibustion plus point-toward-point needling method has a better effect in improving symptoms of refractory facial paralysis,decreasing the incidence of sequelae,and increasing clinical efficacy than the point-toward-point needling method alone. 展开更多
关键词 Acupuncture Therapy Point-toward-point Needling Method Moxibustion Therapy Thermal Box Moxibustion Tube Moxibustion Electromyography Facial Paralysis
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