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基于Hilbert变换的条纹-灰度线性投影三维测量

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应用科学学报 2024年第2期42卷 302-313页

作者：翟亚宇王美慧杨诚鹿靖李游中国船舶工业综合技术经济研究院北京100081 北京航空航天大学可靠性与系统工程学院北京100191

针对传统的条纹投影测量中绝对相位求解方法存在投影图像数量较多以及算法复杂程度高的问题,提出了一种基于Hilbert变换的条纹-灰度线性投影策略及相位求解方法,该方法仅使用3幅投影图像——1幅高频条纹图和2幅灰度线性变化图,通过Hilb... 详细信息

针对传统的条纹投影测量中绝对相位求解方法存在投影图像数量较多以及算法复杂程度高的问题,提出了一种基于Hilbert变换的条纹-灰度线性投影策略及相位求解方法,该方法仅使用3幅投影图像——1幅高频条纹图和2幅灰度线性变化图,通过Hilbert变换求得包裹相位,采用灰度线性变化图像得到基础相位,联立包裹相位和基础相位可得到条纹级数,进而得到绝对相位。通过构建的主动双目系统得到的三维重构结果发现,该方法可以有效恢复被测物体的三维形状,测量精度可达0.1 mm。

关键词：三维测量条纹-灰度线性投影 Hilbert变换绝对相位主动双目

Effects of a hypogeomagnetic field on gravitropism and germination in soybean

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Effects of a hypogeomagnetic field on gravitropism and germi...

2011年空间生命与生命起源暨航天医学工程学术研讨会

作者： Wei-chuan Mo~(1,2),Zi-jian Zhang~(1,2),Ying Liu~(1,2),Guang-jie zhai~3, Yuan-da Jiang~3,Rong-qiao He~(1,2) 1 The State Key Laboratory of Brain and Cognitive sciences,Institute of Biophysics,chinese academy of sciences,15 Datun Road,Chaoyang District,beijing 100101,china 2 Graduate University of the chinese academy of sciences,Yuquan Road,beijing 100049,china 3 Center for Space Science and Applied Research,chinese academy of sciences,1 Zhongguancun Nanertiao Road,Haidian District,beijing 100190,china.

＜正＞Hypogeomagnetic field（HGMF）refers to a geomagnetic field（GMF）eliminated environment,which is one of the characteristic environmental factor in outer space. Any plants grown during long-term space missions will inevitably experience the hypogeomagnetic *** is possible that the innate adaptation of plants to the

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TNT和温压炸药浅埋爆炸效应差异性研究

兵器装备工程学报 2024年第5期45卷 160-166页

作者：杨峰翟红波苏健军李尚青肖洋刘伟西安近代化学研究所西安710065 军事科学院防化研究院北京102205

为研究TNT和温压炸药浅埋爆炸效应的差异性,文章开展了浅埋爆炸试验,系统分析了TNT和温压炸药在爆坑形貌和地表空气冲击波波形等方面的差异。结果表明:相同工况的浅埋爆炸,温压炸药产生的爆坑直径、深度以及体积都大于TNT,装药埋深为0.... 详细信息

为研究TNT和温压炸药浅埋爆炸效应的差异性,文章开展了浅埋爆炸试验,系统分析了TNT和温压炸药在爆坑形貌和地表空气冲击波波形等方面的差异。结果表明:相同工况的浅埋爆炸,温压炸药产生的爆坑直径、深度以及体积都大于TNT,装药埋深为0.1 m和0.3 m时,温压炸药产生的爆坑体积分别是TNT的1.2倍和2.3倍。通过对测得的冲击波参数进行比较,分析得出:当埋深为0.1 m和0.3 m时,比例距离为1的测点处温压炸药产生的冲击波峰值压力分别是TNT的2.16倍和1.41倍;在研究范围内,比例距离和埋深变化对不同类型装药的冲击波冲量衰减量影响很小,但对衰减率有较大影响,当埋深从0.1 m增加为0.3 m时,2种类型装药的冲量衰减率都增加了近1倍。

关键词：浅埋爆炸爆坑空气冲击波峰值压力冲量

Experimental study on the P wave velocity in rocks from lower crust and crust-mantle transitional zone beneath the Hannuoba

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Experimental study on the P wave velocity in rocks from lowe...

中国科学院地质与地球物理研究所2002学术年会

作者： Fan Qicheng~(a,b) Sui Jianli~(a,b) Zhang Hongfu~a zhai Mingguo~a Xie Hongsen~c a.Institute of Geology and Geophysics,chinese academy of Science,beijing 100029,china b.Institute of Geology,china Seismological Bureau,beijing 100029,china c.Institute of Geochemistry,chinese academy of sciences,Guiyang 550002,china

Cenozoic basalt-borne mafic granulite-facies plagioclase pyroxenite and eclogite-facies garnet pyroxenite xenoliths from the Hannuoba,as well as nearby Archean terrain granulites,are selected for the experimental study on the P wave velocity at high temperature and high pressure in order to reveal the present-day compositional features for the lower crust and crust-mantle transitional *** show that mafic xenoliths have high Vp(7.0～8.0 km/s),in contrast,the Archean terrain granulites have low Vp(<7.0 km/s).High Vp mafic xenoliths can represent the present-day compositional features for the lower crust and crust-mantle transitional zone beneath the *** provides new evidence for the crust vertical growth and the formation of the crust-mantle transitional zone resulted from the magma *** Vp Archean granulite still remains the characteristics of the early lower crust.

关键词： lower crust and crust-mantle transitional zone mafic xenolith wave velocity Hannuoba

生物制剂及小分子靶向药治疗掌跖脓疱病研究进展

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中国麻风皮肤病杂志 2024年第9期40卷 669-673页

作者：杨雁南王俊慧中国中医科学院广安门医院北京100053

掌跖脓疱病(palmoplantar pustulosis,PPP)是一种局限于掌跖部位的慢性复发性皮肤病,目前尚无统一的治疗标准,生物制剂及小分子靶向药物作为新兴药物,目前已开展多项临床试验及病例系列研究,本文就PPP相关生物制剂及小分子靶向药物临床... 详细信息

掌跖脓疱病(palmoplantar pustulosis,PPP)是一种局限于掌跖部位的慢性复发性皮肤病,目前尚无统一的治疗标准,生物制剂及小分子靶向药物作为新兴药物,目前已开展多项临床试验及病例系列研究,本文就PPP相关生物制剂及小分子靶向药物临床研究进展进行综述,为进一步开展临床治疗和相关药物研发提供参考。

关键词：生物制剂小分子靶向药物掌跖脓疱病临床试验病例系列研究

Study on CCD Image Compression and Mass Storage

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Study on CCD Image Compression and Mass Storage

20th Congress of the International Commission for Optics

作者： Hong Liu a,b,c1 , Linpei zhai a , Jihong Xiu a and Xiuying Zhao a,b,ca Changchun Institute of Optics, Fine Mechanics and Physics, chinese academy of sciences, Changchun 130033, china b Graduate School of chinese academy of sciences, beijing 100039, china c Aviation University of Air Force, Changchun 130022, china

When CCD camera photographs massive images in the air, it is very important to compress and save CCD image timely and validly. This paper designs the CCD image compression and mass storage system. The

关键词： Wavelet transform Zerotree coding Real-time compress Mass storage system SCSI Fast data storage

Effect of Process Factors on Microstructure of Semisolid Continuous Casting Billets

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International Journal of Minerals,Metallurgy and Materials 2000年第4期14卷 242-245页

作者： Shuming Xing, Qijie zhai, Hanqi Hu ( Department of Mechanical Engineering, Tsinghua University, beijing 100084, china School of Material Science and Engineering, Shanghai University, Shanghai 200072, china Material Science and Engineering School, Univer Department of Mechanical Engineering Tsinghua University Beijing 100084 China School of Material Science and Engineering Shanghai University Shanghai 200072 China Material Science and Engineering School University of Science and Technology Beijing Beijing 100083 China

Semisolid continuous casting (SSCC) is a new technology to produce billets for semisolid metal forming (SSMF). The effect of process factors, such as pouring temperature, stirring rate, preheating temperature and thermal conductivity of stirring chamber, on the microstructure of SSCC billets was studied by means of the factorial experimental method. The results show that the microstructure of SSCC billets can be controlled by the above-mentioned four process factors. In order to obtain fine and rounded granular grains in an SSCC billet, the pouring temperature, preheating temperature and stirring rate should be kept in a moderate range, and the thermal conductivity of stirring chamber should be high. The regression equations with the process factors connecting the microstructure was also set up based on experimental data.

关键词： semisolid metal continuous casting process factors microstructure Metallurgy

Effects of VEGF、ET-1 and 6-Keto-PGF1α between Herba Ephedrae and Fructus Schisandrae in rats with pulmonary fibrosis Effects of Ephedra and schisandra for treating IPF

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Effects of VEGF、ET-1 and 6-Keto-PGF1α between Herba Ephedr...

第十一届全国青年药学工作者最新科研成果交流会

作者： Hua-qiang zhai School of chinese Materia,beijing University of chinese Medicine,BUCM beijing,china Xiao-hui WANG School of chinese Materia,beijing University of chinese Medicine,BUCM beijing,china

Aim:To observe differences between Herba Ephedrae and Fructus Schisandrae on the angiogenesis for treating rat idiopathic pulmonary fibrosis induced by ***:The rats were modeled by bleomycin,which divided into six groups to drug administration,ephedra alone,schisandra alone,the combination of the two drugs,hydrocortisone alone for 28 days.7d and 28d,the rats were killed respectively for Pathological morphology examination microvascular density examination,Angiogenesis-related cytokines ***:Both the Ephedra group and the hydrocortisone group had statistically significant on restraining the alveolitis grades and pulmonary fibrosis（P＜ 0.05）.the number of the blood vessel of the Ephedra group is higher than the Schisandra group and combination therapy *** 7d,the level of ET-1 of the model group was at a higher level,and had more significant difference with the normal group（P＜0.01）.The level of 6-Keto-PGF 1a of the treatment group rised,and there was significant difference between Ephedra,and combination therapy group and the normal group（P＜0.05）.Conclusion:Ephedra has positive effect on restrain the increase of Lung *** therapy group can significantly restrain the pulmonary artery injury and can also restrain the angiogenesis of the arteries by reducing the level of ET-1 and promoting the level of 6-Keto-PGF 1a in *** Ephedra and schisandra can restrain alveolitis and the development of pulmonary fibrosis.

关键词： idiopathic pulmonary fibrosis Herba Ephedrae Fructus Schisandrae VEGF ET-1 6-Keto-PGF1α

Shear-hosted Mesothermal Vein System in the Jiapigou Goldfield,Northeast china:Implication for Subsequent Exploration

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Shear-hosted Mesothermal Vein System in the Jiapigou Goldfie...

中国科学院地质与地球物理研究所2003学术年会

作者： Hongtao LIU,Jianming LIU,Shihua SUN and Mingguo zhai Key Laboratory of Mineral Resources,Institute of Geology and Geophysics,chinese academy of sciences,beijing 100029,P.R.of china

The auriferous mesothermal lodes and veins occurred in the Jiapigou Goldfield,Jilin Province,Northeast china, are inevitably hosted by shear zones or fractures of varying orientations and *** recent study suggests that the Jiapigou major shear zone(JMSZ) - a regional NW-SE-trending driving structure,played an essential role in the formation and localization of the shear-hosted auriferous mesothermal *** dextral shearing of the JMSZ controlled the general occurrences and orientations of lodes and veins,and consequently,constrained the development of the internal structures, geometric details and final localization of lodes and ***,the development and final localization of shear-hosted gold system can be comprehensively recognized in terms of both the Riedel shear system theory and the effects of the regional prolonged progressive deformation of subhorizontally right-lateral *** lodes and veins belonging to"R-"and"D-shear"would tend to be much more stable along their strike and dip directions than those belonging to"T-fracture"in the Riedel shear ***,due to the prolonged progressive deformation,the original T-fractures might undergo local strain localization and partitioning and finally were modified into hybrid fractures filled by auriferous quartz veins,as displayed by many typical lodes and veins occurred in the Jiapigou *** order to refine predictive exploration modeling, it is important to understand the structural attributes,geometries,and final localization kinematics of ore-hosting shears in a huge shear system as that developed in the Jiapigou Goldfield.

关键词： shear vein system progressive deformation ore localization Jiapigou Goldfield Northeast china