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GPU-based Stereo Matching Algorithm with the Strategy of Population-based Incremental Learning
Nie, Dong-Hu,Han, Kyu-Phil,Lee, Heng-Suk Korea Information Processing Society 2009 Journal of information processing systems Vol.5 No.2
To solve the general problems surrounding the application of genetic algorithms in stereo matching, two measures are proposed. Firstly, the strategy of simplified population-based incremental learning (PBIL) is adopted to reduce the problems with memory consumption and search inefficiency, and a scheme for controlling the distance of neighbors for disparity smoothness is inserted to obtain a wide-area consistency of disparities. In addition, an alternative version of the proposed algorithm, without the use of a probability vector, is also presented for simpler set-ups. Secondly, programmable graphics-hardware (GPU) consists of multiple multi-processors and has a powerful parallelism which can perform operations in parallel at low cost. Therefore, in order to decrease the running time further, a model of the proposed algorithm, which can be run on programmable graphics-hardware (GPU), is presented for the first time. The algorithms are implemented on the CPU as well as on the GPU and are evaluated by experiments. The experimental results show that the proposed algorithm offers better performance than traditional BMA methods with a deliberate relaxation and its modified version in terms of both running speed and stability. The comparison of computation times for the algorithm both on the GPU and the CPU shows that the former has more speed-up than the latter, the bigger the image size is.
Two New Species in the Family Cunninghamellaceae from China
( Heng Zhao ),( Jing Zhu ),( Tong-kai Zong ),( Xiao-ling Liu ),( Li-ying Ren ),( Qing Lin ),( Min Qiao ),( Yong Nie ),( Zhi-dong Zhang ),( Xiao-yong Liu ) 한국균학회 2021 Mycobiology Vol.49 No.2
The species within the family Cunninghamellaceae are widely distributed and produce important metabolites. Morphological studies along with a molecular phylogeny based on the internal transcribed spacer (ITS) and large subunit (LSU) of ribosomal DNA revealed two new species in this family from soils in China, that is, Absidia ovalispora sp. nov. and Cunninghamella globospora sp. nov. The former is phylogenetically closely related to Absidia koreana, but morphologically differs in sporangiospores, sporangia, sporangiophores, columellae, collars, and rhizoids. The latter is phylogenetically closely related to Cunninghamella intermedia, but morphologically differs in sporangiola and colonies. They were described and illustrated.
Torque ripple reduction for switched reluctance motors using global optimization algorithm
Ben, Tong,Nie, Heng,Chen, Long,Jing, Libing,Yan, Rongge The Korean Institute of Power Electronics 2022 JOURNAL OF POWER ELECTRONICS Vol.22 No.11
Global optimization algorithms are widely used to effectively suppress the torque ripple in switched reluctance motors (SRMs). In this paper, an improved velocity-controllable particle swarm optimization algorithm (VCPSO) is proposed to optimize the turn-of angle of an SRM under the current chopping control (CCC) method. In addition, the performances of three global optimization algorithms are compared and analyzed. The specific steps are outlined as follows. First, the static non-linear inductance-current-position and torque-current-position curves of the SRM are obtained through finite-element calculations, and a non-linear model of the SRM is established on this basis. Second, the turn-of angle optimization method based on the VCPSO is proposed. Finally, the performances of the simulated annealing algorithm (SA), the genetic algorithm (GA), and the proposed algorithm are compared and analyzed in terms of torque ripple suppression. The obtained results show that the proposed VCPSO has the advantages of a low number of iterations, low torque ripple, and small peak current in the torque ripple reduction issue of the SRM.
Chen Long,Zhang Chunwei,Ben Tong,Nie Heng 대한전기학회 2023 Journal of Electrical Engineering & Technology Vol.18 No.2
As the power transfer efficiency (PTE) is rapidly reduced due to the high offset between the transmitter and the receiver in the wireless power transfer (WPT) system, a Bidirectional Staggered Solenoid Structure (BSSS) with high anti-offset performance was proposed in this paper. Firstly, the factors that affect the PTE are analyzed by establishing a mathematical model of the magnetic coupling structure. Secondly, a parameter optimization method for the traditional flat solenoid coil (FSC) is proposed, which reduces the volume of the magnetic core without reducing the anti-offset ability. Then, the anti-offset performance of the optimized magnetic coupling structure is analyzed and compared with the square, the circle, and the DD (double D) coils structure by three-dimensional (3-D) finite element analysis (FEA). Finally, the anti-offset performance of the structure is verified by a S/S compensated WPT prototype. The PTE is still high when the power transfer distance (PTD) is 164 mm. When the offset distance in X and Y directions increases from 0 to 150 mm, PTE only decreases by 2.62% and 3.71%, respectively.
Zhang, Yan-Li,Li, Qing,Yang, Xiao-Mei,Fang, Fang,Li, Jun,Wang, Ya-Hui,Yang, Qin,Zhu, Lei,Nie, Hui-Zhen,Zhang, Xue-Li,Feng, Ming-Xuan,Jiang, Shu-Heng,Tian, Guang-Ang,Hu, Li-Peng,Lee, Ho-Young,Lee, Su-J American Association for Cancer Research 2018 Cancer research Vol.78 No.9
<P>Matricellular protein SPON2 acts as an HCC suppressor and utilizes distinct signaling events to perform dual functions in HCC microenvironment.</P><P>Tumor-associated macrophages (TAM) represent key regulators of the complex interplay between cancer and the immune microenvironment. Matricellular protein SPON2 is essential for recruiting lymphocytes and initiating immune responses. Recent studies have shown that SPON2 has complicated roles in cell migration and tumor progression. Here we report that, in the tumor microenvironment of hepatocellular carcinoma (HCC), SPON2 not only promotes infiltration of M1-like macrophages but also inhibits tumor metastasis. SPON2-α4β1 integrin signaling activated RhoA and Rac1, increased F-actin reorganization, and promoted M1-like macrophage recruitment. F-Actin accumulation also activated the Hippo pathway by suppressing LATS1 phosphorylation, promoting YAP nuclear translocation, and initiating downstream gene expression. However, SPON2-α5β1 integrin signaling inactivated RhoA and prevented F-actin assembly, thereby inhibiting HCC cell migration; the Hippo pathway was not noticeably involved in SPON2-mediated HCC cell migration. In HCC patients, SPON2 levels correlated positively with prognosis. Overall, our findings provide evidence that SPON2 is a critical factor in mediating the immune response against tumor cell growth and migration in HCC.</P><P><B>Significance:</B> Matricellular protein SPON2 acts as an HCC suppressor and utilizes distinct signaling events to perform dual functions in HCC microenvironment.</P><P><B>Graphical Abstract:</B> http://cancerres.aacrjournals.org/content/canres/78/9/2305/F1.large.jpg. <I>Cancer Res; 78(9); 2305–17. ©2018 AACR</I>.</P><P><B>Graphical Abstract</B></P><P> [Figure]</P>