Image Retrieval Based on Deep Belief Networks

Sun Ting,Qi Yingchun 보안공학연구지원센터 2016 International Journal of Multimedia and Ubiquitous Vol.11 No.1

According to the local and global feature of image, matching the image from a lot image library, this is the image retrieval task; however, the image retrieval need to search the information in the database, we need to find a method for efficient information retrieval. Deep belief network according to the characteristic of the initiative, through the method of training a multilayer neural network to process large amounts of data, and it is very efficient, in this article, as to the characteristics of image local features and global features, it gives a deep belief network image retrieval algorithm, the experiment verify the effectiveness of the algorithm.

Inhibition of MicroRNA-15a/16 Expression Alleviates Neuropathic Pain Development through Upregulation of G Protein-Coupled Receptor Kinase 2

( Tao Li ),( Yingchun Wan ),( Lijuan Sun ),( Shoujun Tao ),( Peng Chen ),( Caihua Liu ),( Ke Wang ),( Changyu Zhou ),( Guoqing Zhao ) 한국응용약물학회 2019 Biomolecules & Therapeutics(구 응용약물학회지) Vol.27 No.4

There is accumulating evidence that microRNAs are emerging as pivotal regulators in the development and progression of neuropathic pain. MicroRNA-15a/16 (miR-15a/16) have been reported to play an important role in various diseases and inflammation response processes. However, whether miR-15a/16 participates in the regulation of neuroinflammation and neuropathic pain development remains unknown. In this study, we established a mouse model of neuropathic pain by chronic constriction injury (CCI) of the sciatic nerves. Our results showed that both miR-15a and miR-16 expression was significantly upregulated in the spinal cord of CCI rats. Downregulation of the expression of miR-15a and miR-16 by intrathecal injection of a specific inhibitor significantly attenuated the mechanical allodynia and thermal hyperalgesia of CCI rats. Furthermore, inhibition of miR-15a and miR-16 downregulated the expression of interleukin-1β and tumor-necrosis factor-αin the spinal cord of CCI rats. Bioinformatic analysis predicted that G protein-coupled receptor kinase 2 (GRK2), an important regulator in neuropathic pain and inflammation, was a potential target gene of miR-15a and miR-16. Inhibition of miR-15a and miR-16 markedly increased the expression of GRK2 while downregulating the activation of p38 mitogen-activated protein kinase and NF-κB in CCI rats. Notably, the silencing of GRK2 significantly reversed the inhibitory effects of miR-15a/16 inhibition in neuropathic pain. In conclusion, our results suggest that inhibition of miR-15a/16 expression alleviates neuropathic pain development by targeting GRK2. These findings provide novel insights into the molecular pathogenesis of neuropathic pain and suggest potential therapeutic targets for preventing neuropathic pain development.

Finite-time Circle Surrounding Control for Multi-agent Systems

Dan Ma,Yingchun Sun 제어·로봇·시스템학회 2017 International Journal of Control, Automation, and Vol.15 No.4

In this paper, a finite-time circle surrounding control problem for multi-agent systems is investigated. The objective is to make all the surrounding agents eventually distribute on a circle uniformly and all the targetagents surrounded by this circle in the finite time. Both a distributed estimator and a distributed control protocolare presented to achieve such a goal. Firstly, an estimator of the targets’ geometric center is used to estimate thecenter of targets. Secondly, a distributed control protocol is proposed for each surrounding agent by using the valueof the estimator to guarantee all the surrounding agents uniformly distribute on a circle and all the target agents aresurrounded by this circle in the finite time. Then it is proved that the control goal can be achieved in the finite time. Finally, a simulation example is given to show the effectiveness of the proposed method.

Synthesis and Application of a Polyamide-containing Phosphorous and Sulfur Flame-retardant for Nylon Fabric

Xiangdong Zhou,Yufa Sun,Yingchun Chen,Bing Sun 한국고분자학회 2018 폴리머 Vol.42 No.2

Monomer of polyamide (PA66) and flame-retardant intermediate product (FR) were firstly synthesized, and the flame-retardant (PA-FR) was further gained by polymerization of PA66 and FR. The structure of PA-FR was confirmed by Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance spectroscopy (NMR), X-ray photoelectron spectroscopy (XPS), and gel permeation chromatography (GPC). The thermal properties of PA-FR and the finished fabric were evaluated by thermal gravity analysis (TGA) and differential scanning calorimetry (DSC). Moreover, X-ray diffraction analysis (XRD) showed that melting eutectic reaction occurred between PA-FR and nylon fabric. The experimental results showed that the limiting oxygen index (LOI) value of PA-FR treated fabric and PA-FR treated fabric after 10 laundries were improved to 28.8% and 26.4%, respectively. It implied that PA-FR had a good and durable function of imparting fire-resistance to nylon fabric.

NUMERICAL ANALYSIS OF THE MIXTURE FORMATION IN A TWOSTROKE WALL-GUIDED LPG DI ENGINE FOR EXTENDED-RANGE ELECTRIC VEHICLE

Xu Boyan,Jiang Longlong,Sun Chaodong,Liu Yingchun 한국자동차공학회 2018 International journal of automotive technology Vol.19 No.2

The use of automotive LPG characteristics which are easy to evaporate vaporization and carry. The paper presents a design of extended-range electric vehicle for wall-guided two stroke LPG engine with direct injection combustion system. Based on the modified vehicle LPG spray model, a database describing the characteristics of vehicle LPG fuel was built and imported into the CFD software. And the accuracy of the model is verified by the Schlieren experimental results. The concentration and velocity field of the mixture in the cylinder under different load conditions are numerically analyzed. The analyzed result indicated that the start injection time θ = 60°−70°CA BTDC under part load condition, the plug electrode near the gathering of a richer mixture is easy to be fired at spark ignition time, the obvious formation of mixture in cylinder is formed and the overall air-fuel ratio is above 40 : 1. The start-transition working condition and large load conditions in the piston moves upward before closing the exhaust port to start injection LPG. The optimized LPG injection start time θ ensures that the fresh gas is locked in the cylinder when the exhaust port is closed (63°CA ABDC). In the ignition time of the spark plug, an ideal homogeneous mixture in the cylinder is realized.

MnFe2O4 nanoparticles coated on one-dimensional carbon nanowires derived from Nitrilotriacetic acid as efficient catalysts to activate peroxymonosulfate for moxifloxacin degradation

Xuefeng Zhang,Yujie Zhang,Qin Yang,Yingchun Yang,Xuping Sun 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.127 No.-

Sulfate radical-based advanced oxidation processes (AOPs) are highly reliable for the elimination of recalcitrantcontaminants by increasing degradability and reducing toxicity. Here, MnFe2O4 nanowires(MnFe2O4 NWs), composed of abundant MnFe2O4 nanoparticles immobilized on one-dimensional carbonnanowires derived from annealed MnFe-Nitrilotriacetic acid (MnFe-NTA) precursor was successfully synthesized. The MnFe2O4 NWs, which could provide more active sites, were then utilized to activate peroxymonosulfate(PMS) for oxidizing the target pollutant Moxifloxacin (MOX) in an aqueous solution. TheMnFe2O4 NWs/PMS system acquired 91.9% removal of MOX and achieved 55.1% chemical oxygen demand(COD) degradation efficiency in 30 min. The results exhibited that the increased catalyst doses and PMSconcentration lead to ascending MOX removal rate, which decreased with the participation of co-existingions. Besides, there is a close relationship between original pH and MOX degradation efficiency. It wasfound that SO4 –, OH, 1O2, and O2 – were involved in the MOX degradation by quenching experimentsand electron paramagnetic resonance (EPR) detection. More importantly, the stable magnetism ofMnFe2O4 NWs contributed to its convenient recycling. Finally, a reliable mechanism for activating PMSwas proposed based on the aforementioned results and previous researches, which could exhibit a novelhorizon in effluent treatment.

Effects of feed intake restriction during late pregnancy on the function, anti-oxidation capability and acute phase protein synthesis of ovine liver

Huan Yang,Ying Wang,Chi Ma,Chuan Sun,Yingchun Liu,Kaifeng Wu,Ming Li,Gerelt Borjigin,Feng Gao 아세아·태평양축산학회 2019 Animal Bioscience Vol.32 No.2

Objective: An experiment was conducted to investigate the effects of feed intake restriction during late pregnancy on the function, anti-oxidation capability and acute phase protein synthesis of ovine liver. Methods: Eighteen time-mated ewes with singleton fetuses were allocated to three groups: restricted group 1 (RG1, 0.18 MJ ME/kg W0.75 d, n = 6), restricted group 2 (RG2, 0.33 MJ ME/kg W0.75 d), n = 6) and a control group (CG, ad libitum, 0.67 MJ ME/kg W0.75 d, n = 6). The feed restriction period was from 90 days to 140 days of pregnancy. Results: The ewe’s body weight, liver weights, water, and protein content of liver in the restricted groups were reduced compared with the CG group (p<0.05), but the liver fat contents in the RG1 group were higher than those of the CG group (p<0.05). The increased hepatic collagen fibers and reticular fibers were observed in the restricted groups with the reduction of energy intake. The concentrations of nonesterified free fatty acids in the RG1 and RG2 groups were higher than those of the CG group with the reduction of energy intake (p<0.05), but there were decreased concentrations of lipoprotein lipase and hepatic lipase in both restricted groups compared with the CG group (p<0.05). In addition, the increased concentrations of β-hydroxybutyric acid, triglycerides, malondialdehyde, total antioxidant capacity and activities of superoxide dismutase activity and catalase were found in the RG1 group, and the concentrations of cholinesterase in the RG1 group were reduced compared with the CG group (p<0.05). For the concentrations of acute phase proteins, the C-reactive protein (CRP) in the RG1 group were reduced compared with the CG group, but there were no differences in haptoglobin relative to the controls (p>0.05). Conclusion: The fat accumulation, increased hepatic fibrosis, antioxidant imbalance and modified synthesis of acute phase proteins were induced in ewe’s liver by maternal malnutrition during late pregnancy, which were detrimental for liver function to accommodate pregnancy.

Atomic Force Microscopy of Asymmetric Membranes from Turtle Erythrocytes

Tian, Yongmei,Cai, Mingjun,Xu, Haijiao,Ding, Bohua,Hao, Xian,Jiang, Junguang,Sun, Yingchun,Wang, Hongda Korean Society for Molecular and Cellular Biology 2014 Molecules and cells Vol.37 No.8

The cell membrane provides critical cellular functions that rely on its elaborate structure and organization. The structure of turtle membranes is an important part of an ongoing study of erythrocyte membranes. Using a combination of atomic force microscopy and single-molecule force spectroscopy, we characterized the turtle erythrocyte membrane structure with molecular resolution in a quasi-native state. High-resolution images both leaflets of turtle erythrocyte membranes revealed a smooth outer membrane leaflet and a protein covered inner membrane leaflet. This asymmetry was verified by single-molecule force spectroscopy, which detects numerous exposed amino groups of membrane proteins in the inner membrane leaflet but much fewer in the outer leaflet. The asymmetric membrane structure of turtle erythrocytes is consistent with the semi-mosaic model of human, chicken and fish erythrocyte membrane structure, making the semi-mosaic model more widely applicable. From the perspective of biological evolution, this result may support the universality of the semi-mosaic model.

Atomic Force Microscopy of Asymmetric Membranes from Turtle Erythrocytes

Yongmei Tian,Mingjun Cai,Haijiao Xu,Bohua Ding,Xian Hao,Junguang Jiang,Yingchun Sun,Hongda Wang 한국분자세포생물학회 2014 Molecules and cells Vol.37 No.8

The cell membrane provides critical cellular functions that rely on its elaborate structure and organization. The structure of turtle membranes is an important part of an ongoing study of erythrocyte membranes. Using a combination of atomic force microscopy and single-molecule force spectroscopy, we characterized the turtle erythrocyte membrane structure with molecular resolution in a quasi-native state. High-resolution images both leaflets of turtle erythrocyte membranes revealed a smooth outer membrane leaflet and a protein covered inner membrane leaflet. This asymmetry was verified by single-molecule force spectroscopy, which detects numerous exposed amino groups of membrane proteins in the inner membrane leaflet but much fewer in the outer leaflet. The asymmetric membrane structure of turtle erythrocytes is consistent with the semi-mosaic model of human, chicken and fish erythrocyte membrane structure, making the semi-mosaic model more widely applicable. From the perspective of biological evolution, this result may support the universality of the semi-mosaic model.

Isolation and Applied Potential of Lactic Acid Bacteria from Chinese Traditional Fermented Food in Specific Ecological Localities

Huaxi Yi,Lanwei Zhang,Xue Han,Ming Du,Yingchun Zhang,Jingyan Li,Kai Sun,Yawen Hou 한국식품과학회 2011 Food Science and Biotechnology Vol.20 No.6

The isolation and screening of lactic acid bacteria (LAB) from natural sources have been one of the powerful means to obtain strains for the food industry. A total of 275 indigenous isolates were obtained from 43samples of traditional fermented foods in specific ecological niches throughout the northwestern China, and among which 13 strains of LAB were selected for their potential in food preservation and production. Among the 13 isolates, Lactobacillus (10) was dominant over Lactococcus (3). The distribution of the isolates was as follows: Lactobacillus paracasei ssp. paracasei (J23, M10,M20, M22), Lactobacillus rhamnosus (J20, M18),Lactococcus lactis ssp. lactis (X20, Q7), Lactobacillus casei (Q1, Q12), Lactobacillus plantarum (J11),Lactococcus lactis ssp. cremoris (X8), Lactobacillus delbrueckii ssp. bulgaricus (Q5). All 13 isolates produced bacteriocin with a broad inhibitory spectrum against selected Gram-positive as well as Gram-negative pathogenic and spoilage species. Biochemical analysis revealed that they possessed high acidification and coagulation activity. Several strains possessed the high activity of 2 or 3technological characteristics, related to novel starters and food preservatives.