Key Point Detection in 3D Reconstruction Based On Human-Computer Interaction

Zhu Shi Wei,Zhang Xiao Guo,Lv Jia Dong,Wang Qing 보안공학연구지원센터 2015 International Journal of Multimedia and Ubiquitous Vol.10 No.1

Aiming at solving problem of points’ redundancy caused by full automatically detecting points and the problem of large workload caused by picking all points manually, I advanced a new method of picking points which is based on Human-Computer Interaction in our 3D reconstruction platform after automatically detecting points. We first detected and matched points automatically and got the homograph matrix between two images, then projected points which were picked by hand on the one image to the other image, at last we would search the interesting feature points in the neighborhood of corresponding points in the two images. Experiments have shown that this method decreases the redundancy brought by large number of points and successfully finds the important feature points, so it lays a good foundation for 3D reconstruction.

Effects of hydrothermal parameters on the physicochemical property and photocatalytic degradation of bisphenol A of Ti-based TiO2 nanomaterials

Dong Li,Yunzhou Chen,Jialin Jia,Haiyang He,Wei Shi,Jianghua Yu,Jun Ma 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.109 No.-

Effects of hydrothermal parameters on morphology, crystal structure, light absorption, separation efficiencyof photo-generated charge carriers, and photocatalytic removal of Bisphenol A (BPA) of Ti-basedTiO2 nanomaterials were systematically investigated. Through changing hydrothermal parameters,TiO2 nanobelts, TiO2 nanosheets and TiO2 nanowires were prepared. With increasing NaOH concentration,hydrothermal temperature, and hydrothermal time, more TiO2 with (101) crystal plane grew onTi substrate, resulting in higher crystallinity. The UV-light absorption enhanced with increasing NaOHconcentration, but decreased with improving hydrothermal temperature, hydrothermal time, and HClconcentration. Variation of UV-light absorption was mainly affected by morphology, and UV-light absorptionof TiO2 nanomaterials with different morphologies was arranged in order ofnanobelts > nanosheets > nanowires. The hydrothermal growth of TiO2 nanomaterials on Ti plate conformedto Ostwald ripening mechanism. Variation trend of photo-generated current was consistent withthat of BPA degradation, they both first increased and then decreased within investigated range. The optimalNaOH concentration, hydrothermal temperature, hydrothermal time, and HCl washing concentrationwere 1 M, 170℃, 28 h, and 0.1 M, respectively. Under this condition, Ti-based TiO2 nanosheets exhibitedthe highest BPA removal efficiency (92.7%), which was due to highly ordered nanosheet structure, goodcrystallinity, appropriate UV-light absorption and high separation efficiency of electron-hole pairs.

Phenylpropanoids and Lignanoids from Euonymus acanthocarpus

Jia Xian Zhu,Hui Zi Jin,Jie Ren,Jiang Jiang Qin,Xiangrong Cheng,Qi Zeng,Fei Zhang,Shi Kai Yan,Wei Dong Zhang 대한약학회 2012 Archives of Pharmacal Research Vol.35 No.10

A new phenylpropanoid derivative (1), along with five phenylpropanoids (2-6), two monoepoxy lignans (8-9), one bisepoxy lignan (10), two cyclolignans (11-12), six neolignans (7, 13-17), two mixed lignan-neolignans (18-19), two lignan glycosides (20-21), and four flavonolignans (22-25), were isolated from the stems and twigs of Euonymus acanthocarpus. Compounds 2-3, 6-8, 12,and 14-25 were obtained from Celastraceae family for the first time, and compounds 5 and 9 were isolated from Euonymus genus for the first time. All the compounds were tested for cytotoxicity against SK-OV-3 and MCG-803 human tumor cell lines. Compounds 3, 10, 12, and 18 showed weak cytotoxicity against SK-OV-3 cell line, and compounds 3-4, 10-13, and 19 showed weak cytotoxicity against MCG-803 cell line.

Effects of moderate pressure on premeability and viability of Saccharomyces cerevisiae cells

Shi-Ru Jia,Na-Chen,Yu-Jie Dai,Chang-Sheng Qiao,Jian-Dong Cui,Bo-Ning Liu 한국화학공학회 2009 Korean Journal of Chemical Engineering Vol.26 No.3

With CO2 and N2 as the pressure media, the effects of the moderate pressure (0.1-1.0MPa) and the holding time on the conductivities of the cell suspension of Saccharomyces cerevisiae CICC1447 and Saccharomyces cerevisiae CICC1339, as well as the absorbances of the supernatant (after centrifuged) at 280 nm (A280) and 260 nm (A260) were determined. The membrane permeability of Saccharomyces cerevisiae CICC1447 increased significantly and the cell leakage was aggravated with the pressure increase. For Saccharomyces cerevisiae CICC1339, the conductivity of the cell suspension, A280 and A260 of the supernatant fluctuated with the pressure increase; as a whole, they increased with pressure. Different from high pressure, a moderate pressure not only remarkably improved the permeability of the yeast cell membrane, but also kept yeast cell viability; moreover, the integrity of the yeast cell membrane could be maintained.

Characteristics of the multiphase flow field with super-cavitation induced by successively fired projectiles under-water and cross-medium

Dong-Hui Zhou,Hong-Hui Shi,Hui-Xia Jia 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.1

The multiphase flow field with supercavitation induced by successively fired underwater projectiles is very complicated. It involves the interaction of two or more supercavitating flow fields, which is very different from the supercavitating flow of single underwater projectile. In the paper, the multiphase flow field with supercavitation induced by two successively fired projectiles underwater and cross-media (water-entry and water-exit) was simulated. The interaction effect between supercavities induced by two projectiles was particularly analyzed. The influence mechanism of the supercavity evolution on the motion of two projectiles was also analyzed. The results indicate that, the supercavitating flow fields of two successively fired underwater projectiles interact on each other. The coalescence, separation and collapse of cavities occur during the interaction stage of the supercavitating flow fields, which causes that the second-fired projectile enters the supercavity of the first one. The second-fired projectile can catch up with the first one and then a rear-end collision happens. The collision causes disturbances on the supercavity contour. The impact load of the secondfired projectile during the water-entry period is smaller than that of the first one. The cavities induced by the first- and second-fired projectiles coalesce each other into a cavity, and the second-fired projectile is finally completely wrapped by a supercavity. During the water-entry process, a rear-end collision also happens. In the process of water-exit, the supercavity induced by the first-fired projectile is blocked under the free surface, and then the first-fired projectile flies into the air after throwing off the water layer. Under the influence of the supercavity separated by the first-fired projectile, the second-fired projectile can escape from its own supercavity, and then enter the supercavity of the first-fired projectile. With the supercavity collapse of the first-fired projectile, a new partial cavity generates around the second-fired projectile.

Rhizosphere Inhibition of Cucumber Fusarium Wilt by Different Surfactinexcreting Strains of Bacillus subtilis

Jia, Ke,Gao, Yu-Han,Huang, Xiao-Qin,Guo, Rong-Jun,Li, Shi-Dong The Korean Society of Plant Pathology 2015 Plant Pathology Journal Vol.31 No.2

Bacillus subtilis B006 strain effectively suppresses the cucumber fusarium wilt caused by Fusarium oxysporum f. sp. cucumerinum (Foc). The population dynamics of Foc, strain B006 and its surfactin over-producing mutant B841 and surfactin-deficient mutant B1020, in the rhizosphere were determined under greenhouse conditions to elucidate the importance of the lipopeptides excreted by these strains in suppressing Foc. Results showed that B. subtilis strain B006 effectively suppressed the disease in natural soil by 42.9%, five weeks after transplanting, whereas B841 and B1020 suppressed the disease by only 22.6% and 7.1%, respectively. Quantitative PCR assays showed that effective colonization of strain B006 in the rhizosphere suppressed Foc propagation by more than 10 times both in nursery substrate and in field-infected soil. Reduction of Foc population at the cucumber stems in a range of $0.96log_{10}ng/g$ to $2.39log_{10}ng/g$ was attained at the third and the fifth weeks of B006 treatment in nursery substrate. In field-infected soil, all three treatments with B. subtilis suppressed Foc infection, indicated by the reduction of Foc population at a range of $2.91log_{10}ng/g$ to $3.36log_{10}ng/g$ at the stem base, one week after transplanting. This study reveals that the suppression of fusarium wilt disease is affected by the effective colonization of the surfactin-producing B. subtilis strain in the rhizosphere. These results improved our understanding of the biocontrol mechanism of the B. subtilis strain B006 in the natural soil and facilitate its application as biocontrol agent in the field.

Production of hydrocortisone by Absidia coerulea in moderate pressure bioconversion system

Shi Ru Jia,Jian Dong Cui 한국화학공학회 2009 Korean Journal of Chemical Engineering Vol.26 No.4

The effects of moderate pressure (0.1-2.5 MPa) on viability, cell membrane permeability and catalyzing activity of Absidia coerulea for RSA were investigated. A new method for improving the production of Hydrocortisone (HC) from 17α-hydroxypregn-4-en-3, 20-dione-21-acetate by Absidia coerulea in moderate pressure was developed. The results showed that the morphology of Abasidia coerulea mycelium was changed in moderate pressure, Absidia coerulea mycelium seemed to be loosed, and cell membrane permeability of Abasidia coerulea mycelium was improved. However, the viability of Abasidia coerulea mycelium could keep high level. Moreover, the yield of HC was improved over 1.25-fold as compared with that of the control (untreated cells), to give the yield of HC as 350 mg/l, when the Abasidia coerulea mycelium was treated with 0.5Mpa the atmosphere as the pressure media. Especially, the production of HC with atmosphere as the pressure media (0.5 MPa) could be increased by the addition of H2O2 (60 mmol/l); the relative yield of HC in moderate pressure was enriched by over 4.5% in comparison with the control. The major composition of bioconverted mixture was reduced. It was indicated that the new approach (moderate pressure) obtained in this work possessed a high potential for the industrial production of HC.

MRI T2-Weighted Imaging and Fat-Suppressed T2-Weighted Imaging Image Fusion Technology Improves Image Discriminability for the Evaluation of Anal Fistulas

Shi-Ting Feng,Mengqi Huang,Zhi Dong,Ling Xu,Yin Li,Yingmei Jia,Huasong Cai,Bingqi Shen,Zi-Ping Li 대한영상의학회 2019 Korean Journal of Radiology Vol.20 No.3

Objective: To explore whether MRI fusion technology (combined T2-weighted imaging [T2WI] and fat-suppressed T2WI [T2WI-FS]) improves signal differences between anal fistulas and surrounding structures. Materials and Methods: A total of 32 patients with confirmed diagnoses of anal fistula were retrospectively studied. All available T2WI and T2WI-FS images for each patient were used to generate fusion image (T2WI-Fusion) based on the addition of gray values obtained from each pixel via an MR post-processing work station. The discriminability of fistula, perianal sphincter, and perianal fat in T2WI, T2WI-FS, and T2WI-Fusion images was quantified with Fisher’s scoring algorithm. For subjective visual image assessment by researchers, five-point scale scores were determined using a modified double-stimulus continuous qualityscale test to evaluate T2WI-FS, T2WI, enhanced axial three-dimensional-volumetric interpolated breath-hold examination (3D-VIBE), and T2WI-Fusion sequence images. The differences were subsequently compared. Results: Mean Fisher scores for fistulas vs. sphincters obtained from T2WI-Fusion (FFusion-fistula = 6.56) were significantly higher than those from T2WI (FT2WI-fistula = 3.35) (p = 0.001). Mean Fisher scores for sphincters vs. fat from T2WI-Fusion (FFusion-sphincter = 10.84) were significantly higher than those from T2WI-FS (FSFS-sphincter = 2.57) (p = 0.001). In human assessment, T2WI-Fusion showed the same fistula discriminability as T2WI-FS, and better sphincter discriminability than T2WI. Overall, T2WI-Fusion showed better discriminability than T2WI, T2WI-FS, and enhanced 3D-VIBE images. Conclusion: T2WI and T2WI-FS fusion technology improves signal differences between anal fistulas and surrounding structures, and may facilitate better evaluation of anal fistulas and sphincters.

Isolation and Preliminary Identification of a Novel Microorganism Producing Aspartame from Soil Samples

Jian Dong Cui,Ya Nan Zhang,Gui Xia Zhao,Shi Ru Jia,Guo Qun Zhao,Si Zhang,Jun Lu 한국식품과학회 2010 Food Science and Biotechnology Vol.19 No.2

To develop a new method for producing aspartame (APM), a simple and efficient strategy for the isolation of certain microorganisms producing APM from soil samples was designed. A newly strain with secreting certain specific dipeptidase to directly synthesize APM from the substrates of L-aspartic acid (L-Asp) and Lphenylalanine methyl ester (L-PM) without protection for amino acid side chains was screened from soil samples. APM concentration in reaction mixture was quantified by high performance liquid chromatography (HPLC), yield reached 0.015 g/L. Examination of the general morphological characteristics and data from the sequence analysis of the rDNA-ITS gene led to identification of the isolate as a strain of fungal endophyte spp. The newly isolated strain had a high potential for application in industrial processes for APM production. In particular, this new method was low cost for synthesis of APM during the reaction due to avoiding protection for amino acid side chains and optical resolution of the mixtures. As we known it, this is first report that a newly strain with a high potential for selective synthesis of the APM was isolated from soil.

Rhizosphere Inhibition of Cucumber Fusarium Wilt by Different Surfactinexcreting Strains of Bacillus subtilis

Ke Jia,Yu-Han Gao,Xiao-Qin Huang,Rong-Jun Guo,Shi-Dong Li 한국식물병리학회 2015 Plant Pathology Journal Vol.31 No.2

Bacillus subtilis B006 strain effectively suppresses the cucumber fusarium wilt caused by Fusarium oxysporum f. sp. cucumerinum (Foc). The population dynamics of Foc, strain B006 and its surfactin over-producing mutant B841 and surfactin-deficient mutant B1020, in the rhizosphere were determined under greenhouse conditions to elucidate the importance of the lipopeptides excreted by these strains in suppressing Foc. Results showed that B. subtilis strain B006 effectively suppressed the disease in natural soil by 42.9%, five weeks after transplanting, whereas B841 and B1020 suppressed the disease by only 22.6% and 7.1%, respectively. Quantitative PCR assays showed that effective colonization of strain B006 in the rhizosphere suppressed Foc propagation by more than 10 times both in nursery substrate and in field-infected soil. Reduction of Foc population at the cucumber stems in a range of 0.96 log10 ng/g to 2.39 log10 ng/g was attained at the third and the fifth weeks of B006 treatment in nursery substrate. In field-infected soil, all three treatments with B. subtilis suppressed Foc infection, indicated by the reduction of Foc population at a range of 2.91 log10 ng/g to 3.36 log10 ng/g at the stem base, one week after transplanting. This study reveals that the suppression of fusarium wilt disease is affected by the effective colonization of the surfactin-producing B. subtilis strain in the rhizosphere. These results improved our understanding of the biocontrol mechanism of the B. subtilis strain B006 in the natural soil and facilitate its application as biocontrol agent in the field.