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Search Results: 1 - 10 of 61031 matches for " Yu Shuchun "
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Stereo Matching for Dynamic Programming on TRIZ
Yu Shuchun,Yu Xiaoyang,Hu Lijuan,Yu Guang
Information Technology Journal , 2012,
Abstract: To solve the contradiction between matching precision and matching speed in stereo matching for dynamic programming, TRIZ theory was introduced. After locating the contradiction in 39 contradiction matrix and getting the solutions for the matrix, we get the TRIZ advice. With this guidance, we apply the pyramid algorithm on low resolution images and adopt bidirectional dynamic programming strategy on disparity space image to speed DP process and then the ground control points were attained. Experimental results showed that the proposed method in the paper has higher matching precision with less time.
A New Direct Triangulation Method for Surface Unorganized Points
Shuchun Yu,Yanhui Wei,Kunpeng He,Xiaoyang Yu
Information Technology Journal , 2010,
Abstract: Triangulations for surface unorganized points have been applied to 3-D reconstruction widely. A new direct triangulation method was proposed in this study. Firstly, an original triangle is built. Then this direct triangulation method is executed according to slick rule, angle of two normal vectors maximized rule, threshold distance rule and internal minimal angle maximized rule. When points are distributed asymmetrically, this method connects sparse region and dense region by Delaunay circumsphere rule. When sum of points is oversize, this method predigests topological structure of the whole points set by segmentation. Experimental results showed that surface unorganized points can be triangulated fast and precisely by this new direct triangulation method.
A Reconstruction Method for Disparity Image Based on Region Segmentation and RBF Neural Network
Yu Shuchun,Yu Xiaoyang,Shan li`na,Zhang Yuping
Information Technology Journal , 2011,
Abstract: The Reconstruction for disparity image is the key technology for 3D image restoration in stereovision field. However, the data volume of disparity images is so large and the topological structures of disparity images is so complicated that reconstruction for disparity image is very difficult. We had done a lot of works for the sake of constructing a new method to reconstruct disparity image. In this study, a reconstruction method for disparity image based on region segmentation and isomorphic RBF(Radical Basis Function) neural network is presented. First, the disparity image is divided into some regions with adjustable threshold and edge detection. Next, reconstruction based on RBF neural network is carried out in every region, in which process the disparity point clouds are optimized. Then, all the regions are connected and the reconstruction result is obtained. When reconstruction based on RBF is executed in different regions, trainings are carried on with different resolution data according to the complexi
Exosomes: Decreased Sensitivity of Lung Cancer A549 Cells to Cisplatin
Xia Xiao, Shaorong Yu, Shuchun Li, Jianzhong Wu, Rong Ma, Haixia Cao, Yanliang Zhu, Jifeng Feng
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0089534
Abstract: Exosomes are small extracellular membrane vesicles of endocytic origin released by many cells that could be found in most body fluids. The main functions of exosomes are cellular communication and cellular waste clean-up. This study was conducted to determine the involvement of exosomes in the regulation of sensitivity of the lung cancer cell line A549 to cisplatin (DDP). When DDP was added to A549 cells, exosomes secretion was strengthened. Addition of the secreted exosomes to other A549 cells increased the resistance of these A549 cells to DDP. Upon exposure of A549 to DDP, the expression levels of several miRNAs and mRNAs reportedly associated with DDP sensitivity changed significantly in exosomes; these changes may mediate the resistance of A549 cells to DDP. Exosomes released by A549 cells during DDP exposure decreased the sensitivity of other A549 cells to DDP, which may be mediated by miRNAs and mRNAs exchange by exosomes via cell-to-cell communication. Although the detailed mechanism of resistance remains unclear, we believed that inhibition of exosomes formation and release might present a novel strategy for lung cancer treatment in the future.
GRAIN-SIZE CHARACTERISTICS OF SEDIMENTS FROM THE ZIGETANG CO LAKE, TIBETAN PLATEAU AND THEIR ENVIRONMENTAL IMPLICATION
青藏高原兹格塘错沉积物粒度组成及其环境记录的研究 *

Shen Huiyan,Li Shijie,Yu Shoubing,Yao Shuchun,
申慧彦
,李世杰,于守兵,姚书春

第四纪研究 , 2007,
Abstract: 兹格塘错是位于藏北高原腹地的一个封闭型湖泊,对其沉积物的粒度组成、粒度参数等粒度特征进行分析,揭示了湖面水位变化,水动力、风动力搬运强度等.并结合其他环境代用指标进行比较,探讨环境变化,揭示了兹格塘错区域全新世初期气候湿润、中期气候偏干、晚期干湿交替的气候变化特征.粒度参数所反映出的湖面波动与环境变化得到了其他环境代用指标较好的支持.
The isotopic abundance and atomic weight of natural uranium
Yongfu Liu,Shuchun Fu
Chinese Science Bulletin , 1997, DOI: 10.1007/BF02882489
Abstract: The published measurement data of atomic weight of uranium are shown in table 4[9]. The best results are those measured by Smith and Cowanet al. A r (U) = 238.028 79–238.028 90(3), their result error being ISD. The evaluated value of IUPAC-CAWIA is Ar(U)=238.028 9(1). In this work, the result is Ar(U) = 238.028 91(4). The combined uncertainty has been given according to 2SD of the measurement data through the calibration of a series of standard materials of uranium isotopes. It is reasonable to conclude that in this work the uncertainty which characterizes the measurement quality is better than other published data.
A Critical Study of the Elastic Properties and Stability of Heusler Compounds: Phase Change and Tetragonal X2YZ Compounds  [PDF]
Shuchun Wu, S. Shahab Naghavi, Gerhard H. Fecher, Claudia Felser
Journal of Modern Physics (JMP) , 2018, DOI: 10.4236/jmp.2018.94050
Abstract: In the present work, the elastic constants and derived properties of tetragonal Heusler compounds were calculated using the high accuracy of the full-potential linearized augmented plane wave (FPLAPW) method. To find the criteria required for an accurate calculation, the consequences of increasing the numbers of k-points and plane waves on the convergence of the calculated elastic constants were explored. Once accurate elastic constants were calculated, elastic anisotropies, sound velocities, Debye temperatures, malleability, and other measurable physical properties were determined for the studied systems. The elastic properties suggested metallic bonding with intermediate malleability, between brittle and ductile, for the studied Heusler compounds. To address the effect of off-stoichiometry on the mechanical properties, the virtual crystal approximation (VCA) was used to calculate the elastic constants. The results indicated that an extreme correlation exists between the anisotropy ratio and the stoichiometry of the Heusler compounds, especially in the case of Ni2MnGa. Metastable cubic Ni2MnGa exhibits a very high anisotropy (28) and hypothetical cubic Rh2FeSn violates the Born-Huang stability criteria in the L21 structure. The bulk moduli of the investigated tetragonal compounds do not vary much (130 ...190 GPa). The averaged values of the other elastic moduli are also rather similar, however, rather large differences are found for the elastic anisotropies of the compounds. These are reflected in very different spatial distributions of Young’s moduli when comparing the different compounds. The slowness surfaces of the compounds also differ considerably even though the average sound velocities are in the same order of magnitude (3.2 ... 3.6 km/s). The results demonstrate the importance of the elastic properties not only for purely tetragonal Heusler compounds but also for phase change materials that exhibit magnetic shape memory or magnetocaloric effects.
The Forming Process of Tongning Gel
痛宁凝胶的成型工艺研究

Shang Qiang,Li Hongxiao,Yu Wei,Zhang Jun,Sun Shuchun,Xiao Wei,
尚 强
,李洪晓,于 伟,张 军,孙树椿,萧 伟

世界科学技术-中医药现代化 , 2010,
Abstract: The forming process of Tongning Gel was studied in this work. Taking the appearance consistency, fluidity, and difficulty degree of smearing as the evaluation indexes, the types and contents of skeletal materials and addition agents were screened. The types and contents of the transdermal enhancer were screened with the cumulative penetration of tetrahydropalmatine as the evaluation index. The substrate formula of Tongning Gel was determined to be carbomer 2%, glycerol 10%, and triethanolamine 2%, at the pH value between 5.40 and 5.65. The results showed that the forming process of Tongning Gel is simple and stable, with fast percutaneous absorption.
The isotopic abundance and atomic weight of natural uranium

Yongfu Liu,Shuchun Fu,

科学通报(英文版) , 1997,
Abstract: Conclusion The published measurement data of atomic weight of uranium are shown in table 49]. The best results are those measured by Smith and Cowanet al. A r (U) = 238.028 79–238.028 90(3), their result error being ISD. The evaluated value of IUPAC-CAWIA is Ar(U)=238.028 9(1). In this work, the result is Ar(U) = 238.028 91(4). The combined uncertainty has been given according to 2SD of the measurement data through the calibration of a series of standard materials of uranium isotopes. It is reasonable to conclude that in this work the uncertainty which characterizes the measurement quality is better than other published data.
Diagnosis of Premature Senescence of Cotton Using SPAD Value  [PDF]
Pengcheng Li, Helin Dong, Aizhong Liu, Jingran Liu, Miao Sun, Guoping Wang, Siping Zhang, Yabing Li, Shuchun Mao
Agricultural Sciences (AS) , 2014, DOI: 10.4236/as.2014.511107
Abstract: Field experiments were conducted in 2011 on an experimental farm at the Cotton Research Insti-tute, Chinese Academy of Agricultural Sciences, Anyang, China. We conducted experiments with a “SPAD-502” meter to quickly measure the relative value of chlorophyll content in the leaf blades of field cotton. Our goal was to seek a suitable leaf on a cotton plant to diagnose senescence status of crop plants at later stages of growth. We began by studying the dynamic change rule of the dis-tal-most four leaves of the cotton plant during the entire growth period with two early-maturing cultivars (CCRI 36, CCRI 50) and two mid-maturing cultivars (CCRI 41, SCRC 28). We also examined the effect of different nitrogen and potassium fertilizer rates on SPAD values of the leaves of SCRC 28. Our results suggest that SPAD values of the 1st distal stem leaves from two early cultivars can act as good indicators of senescence status in the plants, if they are measured between 10 d before the boll-opening stage and 10 d after boll opening stage. Differences of SPAD values of the 3rd distal stem leaves of two mid-maturing cultivars measured between about 15 d before the boll opening stage and 15 d after the boll opening stage can also be used to measure senescence status in these cotton cultivars. The conclusion can be used for cotton producer to manage N fertilizer better at later growth stage.
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