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Fractional Differentiation-based Image Feature Extraction
Xiangwei Xu,Fang Dai,Wenyan Guo,Jianmin Long 보안공학연구지원센터(IJSIP) 2014 International Journal of Signal Processing, Image Vol.7 No.6
Two novel methods for image feature extraction based on fractional differentiation are presented in this paper. The first method is the feature extraction of fusing multi-direction CRONE operators. In this method, the fractional differential CRONE mask is generalized to eight directions at first for extracting image features; then the extracted features are tested by the statistic method and fused by the gradient ratio, so that the outlines of the objects in the image are obtained. In order to extract the detail feature information in the image effectively, the second method, the ‘S+Z’ extraction combined with the space-filling curves, is presented. By introducing the space-filling curves, the ‘S’ curve and the ‘Z’ curve, and making full use of the neighborhood information of image pixels, the detailed features of the objects in the image are obtained. The experiment results show that our methods can obtain satisfactory image features.
Jinrong Liu,Fang Xie,Jianmin Wang,Weiwei Chen 한국화학공학회 2016 Korean Journal of Chemical Engineering Vol.33 No.7
We propose a new type of micro-channel turbulence promoter with micro-pores (MCTP-MPs) which is configured on the flat-sheet membrane surface to decrease membrane fouling and reduce energy consumption. The computational fluid dynamics (CFD) simulation and particle image velocimetry (PIV) experiment are employed to predict turbulent flow in a flat-sheet membrane channel equipped with MCTP-MPs. Velocity profiles and wall shear stresses on membrane surface obtained from PIV were compared with the simulated data to validate the reliability of the CFD simulation. The CFD simulation results and PIV experiment results showed that the corrugated MCTP of 300 μm micro-pores crosswise placed on the membrane surface could increase velocity and wall shear stress on the flat-sheet membrane surface, which improved the filtration flux, reduced concentration polarization and mitigated membrane fouling in the meantime.
Li Xiaojuan,Dong Guangping,Fang Jianmin,Liu Hongjian,Guo Wanlin,Yin Huayang 한국곤충학회 2020 Entomological Research Vol.50 No.7
Dastarcus helophoroides (Fairmaire) (Coleoptera: Bothrideridae) is an effective ectoparasitoid of pine sawyer beetle Monochamus alternatus Hope (Coleoptera: Cerambycidae) which is the major median insect for transmission of pine wood nematode, Bursaphelenchus xylophilus (Steiner et Buhrer) Nickle (Aphelenchida: Parasitaphelenchidae). A sensitive and acute olfactory system is extremely essential for newly hatched larva of D. helophoroides to forage for a host. Therefore, we established the transcriptome of newly hatched D. helophoroides larvae and characterized the expression profiles of olfactory genes. We identified 20 transcripts encoding putative odorant binding proteins (OBPs), 11 putative chemosensory proteins (CSPs), 9 putative odorant receptors (ORs), 11 putative ionotropic receptors (IRs), 7 putative gustatory receptors (GRs) and 4 putative sensory neuron membrane proteins (SNMPs) olfactory genes from the transcriptome of newly hatched D. helophoroides larvae. According to the phylogenetic analysis, 3 OBPs (DhelOBP6, DhelOBP14 and DhelOBP19), 1 CSP (DhelCSP11), 1 OR (DhelOrco1), 3 IRs (DhelIR3, DhelIR6 and DhelIR8), 3 GRs (DhelGR2, DhelGR4 and DhelGR5) and 2 SNMPs (DhelSNMP1 and DhelSNMP3) had high similarities with reported Coleopteran species. The highest expressed olfactory gene was DhelCSP3, followed by DhelOBP8 and DhelCSP2. The expression levels of the majority of OR, IR, GR and SNMP genes were low. These results indicate that CSPs and OBPs may play important roles in the olfactory recognition process in newly hatched D. helophoroides larvae. The findings from the present study are helpful in unraveling the profound mystery between D. helophoroides and M. alternatus, as well as improving the parasitism efficiency of D. helophoroides larvae.
Yongxin Zhang,Qing-Hai Huang,Yibin Fang,Pengfei Yang,Yi Xu,Bo Hong,Jianmin Liu 대한영상의학회 2017 Korean Journal of Radiology Vol.18 No.5
Objective: The Tubridge flow diverter (FD) is a novel device aimed at reconstructing the parent artery and occluding complex aneurysms. Retreatment of recurrent aneurysms using the FD is challenging. We report our initial experience in the repair of aneurysm recurrence with the FD. Materials and Methods: A database was reviewed prospectively, and 8 patients with 8 recurrent aneurysms (mean size, 16.7 mm) were identified. Four aneurysms had previously ruptured. The previous aneurysm treatment consisted of coiling in 1 aneurysm and single-stent-assisted coiling in 7 aneurysms. The procedural complications and clinical and angiographic outcomes were analyzed. Results: Six aneurysms were treated by using a single Tubridge FD alone, while the remaining 2 were treated with FD + coiling. The immediate results of the 8 aneurysms were that they all showed incomplete occlusion. Neither major ischemic nor hemorrhagic complications occurred; however, 1 patient experienced a vasospasm. Follow-up angiographies were available for 7 aneurysms; the mean follow-up was 16.9 months (7–36 months). Five aneurysms were completely occluded, whereas 2 had a residual neck. Severe asymptomatic stenosis of 1 parent artery of a vertebral artery dissecting aneurysm was found. All visible branches covered by the FD were patent. All patients were clinically assessed as having attained a favorable outcome (modified Rankin Scale score ≤ 2) at discharge and follow-up. Conclusion: In selected patients, the Tubridge FD can provide a safe and efficient option for the retreatment of recurrent aneurysms. Nevertheless, attention should be paid to several technical points.
The PP6 Phosphatase Regulates ABI5 Phosphorylation and Abscisic Acid Signaling in <i>Arabidopsis</i>
Dai, Mingqiu,Xue, Qin,Mccray, Tyra,Margavage, Kathryn,Chen, Fang,Lee, Jae-Hoon,Nezames, Cynthia D.,Guo, Liquan,Terzaghi, William,Wan, Jianmin,Deng, Xing Wang,Wang, Haiyang American Society of Plant Biologists 2013 The Plant cell Vol.25 No.2
<P>This study shows that two catalytic subunits of <I>Arabidopsis</I> protein phosphatase 6 (i.e., FyPP1 and FyPP3) negatively regulate abscisic acid responses through direct interaction with and dephosphorylation of ABI5, which subsequently regulates ABI5 stability and activity, seed germination, and postgermination seedling growth in <I>Arabidopsis</I>.</P>