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Articles by Jin Wang
Total Records ( 9 ) for Jin Wang
  Juanjuan Zhao , Guohua Ji , Wei Wei , Jin Wang , Yongxing Liu , Quan Wang and Yan Qiang
  This study presents a new wavelet-based noise reduction scheme based on the lifting scheme and genetic algorithms, which is a novel approach by using a Genetic Algorithm and lifting wavelet framework for threshold selection. There are two folders in this approach. Firstly, it adapts itself to various types of noises without any prior knowledge of noise; secondly, it suppresses noises while preserving the dynamics of the signals. The experimental evaluation is conducted to compare the performances of the new method with existing approaches and the applications for signal denoising are investigated in this study.
  J. Juan Zhao , Jin Wang , Wei Wei , Xiao Min Chang and Bo Pei
  With the quick development of computer image detection technique, image boundary inspect method has become the field of image processing and computer vision research focus, digital image boundary inspection is image segmentation, image recognition, image analysis for instance area shape extracting the important foundation. Based on Canny operator manually select the threshold improperly, which result in edge detection has some ineffective shortcomings. In this study, the method is presented an reinforced Canny boundary inspection to automatically produc an adaptive threshold for Canny edge detection operator. In the algorithm, it can create the threshold parameter automatically, by the mean square error and average gray of the image. Therefore this method can avoid errors caused by manual input and obtain a desired edge effect.
  Jin Wang , Ying Guo and Shao Yue Zhang
  Background and Objective: Vanillic Acid (VA) is a dihydroxybenzoic acid derivative found in in the roots of Angelica sinensis and used for treating various ailments. The current preclinical study was designed to demonstrate the neuroprotective activity of VA against cerebral Ischemia-Reperfusion (I/R) injured rat model. Materials and Methods: Healthy Sprague-Dawley (SD) rats (n = 40) were segregated into 4 groups. Rats received only saline (Group I), rats were induced by Middle Cerebral Artery Occlusion (MCAO) for 90 min and followed by reperfusion for 24 h (group II), group III and IV rats pretreated with VA (50 or 100 mg kg–1) for 14 days and followed by MCAO induction. Data were analyzed using Turkey’s test with SPSS software. Results: A considerable decline in the neurological deficit score and cerebral infarct area was observed in VA pretreated group. On administration with VA (50 or 100 mg kg–1) concomitantly lowered the levels of lipid peroxidation product (Malondialdehyde-MDA) with improved antioxidant status (superoxide dismutase, catalase). Whereas, the inflammatory markers such as interleukins-6 (IL-6), IL-1β, Tumor Necrosis Factor Alpha (TNF-α) and Nuclear Factor Kappa B (NF-κB) p65 subunit were remarkably decreased upon VA supplementation, on comparison with MCAO induced group. Furthermore, the relative protein expression of TNF-α and NF-κB p65 were significantly hampered on 14-day intervention with VA. Conclusion: The outcome of this study inferred that VA (100) could exert better neuroprotective activity by improving neuronal function via attenuating inflammatory cascade.
  Jin Wang , Xiaodong Zhang , Shuo Zhang and Yingzi Li
  Open source design is a new mode which is composed of many agents who spontaneously cooperate to complete product design. A process model of open source design based on multi-agent is proposed in this paper with the purpose of studying the dynamic characteristics of product evolution and the ability of design-agent in the process of product design. A set of indexes which can evaluate the process of product evolution and the ability of agent is developed, including the weight of each module, product maturity, completion time of module for each agent and development ability of the agent. The algorithms of indexes are realized and verified in the simulation program. The simulation results show that the proposed simulation approach and evaluation indexes are effective for evaluation and management of open source design.
  Run-Bing Li , Lin Zhou , Jin Wang and Ming-Sheng Zhan
  We demonstrate a technique for directly measuring the quadratic Zeeman shift using stimulated Raman transitions. The quadratic Zeeman shift has been measured yielding Δν=1296.8±3.3Hz/G2 for magnetically insensitive sublevels (5S1/2,F=2,mF=0→5S1/2,F=3,mF=0) of 85Rb by compensating the magnetic field and cancelling the ac Stark shift. We also measured the cancellation ratio of the differential ac Stark shift due to the imbalanced Raman beams by using two pairs of Raman beams (σ+, σ+) and it is 1:3.67 when the one-photon detuning is 1.5GHz in the experiment.
  Hancheng Wang , Jin Wang , Wenhong Li , Jiehong Zhao , Maosheng Wang , Ning Lu , Yushuang Guo and Changqing Zhang
  Tobacco black shank caused by Phytophthora nicotianae is one of the most destructive diseases suffered by tobacco in China. Streptomycin, calcium oxide and synthetic fertilizer are three important non-target chemicals used frequently during tobacco growing period. This study has evaluated the activities of the non-target chemicals streptomycin, calcium oxide and synthetic fertilizer on the mycelial growth, sporulation, zoospore formation and germination of cystospores of P. nicotianae. Metabolic fingerprints of P. nicotianae under pressures of those three chemicals are also compared with control treatments. Streptomycin inhibited mycelial growth, sporangia production, zoospore formation and cystospore germination more effectively than the other chemicals tested. Calcium oxide inhibited sporangia production, zoospore formation and cystospore germination at much higher concentration. Mycelial growth of P. nicotianae was not affected by this chemical. Synthetic fertilizer had negative or no effect on sporangia production and no effect on mycelial growth. Zoospore formation and cystospore germination was inhibited at high concentrations of this chemical. Metabolic fingerprint of P. nicotianae was not or poorly affected by calcium oxide and synthetic fertilizer. Streptomycin significantly changed the fingerprint of the pathogen, substrate of y-aminobutyric acid, fumaric acid, L-alaninamide, L-alanyl-glycine, L-proline, L-pyroglutamic acid and putrescine cannot be utilized by P. nicotianae. So it is no use to add calcium oxide to soil for black shank management in the field, while is useful for streptomycin. Synthetic fertilizer in some case may enhance the development of the disease. These new findings provide important information for black shank management in the future.
  Hancheng Wang , Yanfei Huang , Jin Wang , Maosheng Wang , Haiqian Xia and Hongxue Lu
  Ralstonia solanacearum that causing devastating disease in Solanaceae crops, is a notorious pathogen worldwide. A collection of the pathogen originating from tobacco and tomato in China was analyzed by using BIOLOG Phenotype MicroArray (PM) and assigned to biovar. Phenotypic fingerprints of two different original strains were also compared to explore their phenotypic diversities. All tested isolates of Ralstonia solanacearum oxidized both disaccharides and sugar alcohols and assigned to biovar 3. Using PM plates 1 to 8, 758 different assays were tested, including 190 different carbon substrates, 95 nitrogen substrates, 59 phosphorus substrates, 35 sulfur substrates, 94 biosynthetic pathways and 285 nitrogen pathways. Phenotypic fingerprints of the pathogen from tobacco and tomato were nearly the same. Ralstonia solanacearum was able to utilize 19% of tested carbon substrates, 43% of nitrogen substrates, 100% of sulfur substrates and 95% of phosphorus substrates. Most informative utilization ways for carbon substrates were organic acids and carbohydrates and for nitrogen were various amino acids. Those findings showed useful information for biology and physiology study of R. solanacearum.
  Hancheng Wang , Jin Wang , Haiqian Xia , Yanfei Huang , Maosheng Wang , Mengao Jia and Zhihe Yu
  Tobacco bacterial wilt caused by Ralstonia solanacearum is one of the most destructive diseases suffered to tobacco in China. Streptomycin, calcium oxide, mancozeb and synthetic fertilizer are four important non-target chemicals used frequently during tobacco growing period. This study has evaluated the activities of four this chemicals against R. solanacearum. Phenotypic pattern of R. solanacearum under pressure of those chemicals are also compared with control treatments. Ralstonia solanacearum was more sensitive to mancozeb (EC50 value of 3.80 μg mL‾1), less sensitive to streptomycin (EC50 value of 32.06 μg mL‾1) and not sensitive to calcium oxide and synthetic fertilizer (EC50 values >1000 μg mL‾1). Under greenhouse condition the disease severity was reduced by 94.96 and 63.03% with mancozeb and streptomycin treatment, respectively. Metabolic reaction of R. solanacearum on Biolog GEN III Microplates was not or poorly affected by synthetic fertilizer or calcium oxide while significantly inhibited by mancozeb and poorly inhibited by streptomycin.
  Hancheng Wang , Yanfei Huang , Haiqian Xia , Jin Wang , Maosheng Wang , Changqing Zhang and Hongxue Lu
  Tobacco brown spot caused by Alternaria alternata is a devastating disease of tobacco worldwide. Phenotypic characterization of the pathogen was investigated to provide some basic information for biology and pathology by using BIOLOG Phenotype Microarray (PM). Using PM plates 1-10, 950 different growth conditions were tested. Results exhibited that the pathogen was able to metabolize 24.74% of tested carbon sources, 85.26% of nitrogen sources, 97.14% of sulfur sources and 89.83% of phosphorus sources. Most informative utilization patterns for carbon sources of A. alternata were carbohydrates and for nitrogen were various amino acids. The pathogen presented 274 different nitrogen pathways. It had wide range adaptabilities in osmolytes with up to 10% sodium chloride, up to 6% potassium chloride, up to 5% sodium sulfate, up to 20% ethylene glycol, up to 6% sodium formate, up to 6% urea, up to 12% sodium lactate, up to 200 mM sodium phosphate, up to 100 mM ammonium sulfate, up to 100 mM sodium nitrate and up to 20 mM sodium nitrite. It also exhibited active metabolism in the range of pH values between 3.5 and 10, with optimal pH of around 6.0. The pathogen showed active decarboxylase activity, whereas no deaminase activity in the presence of various amino acids.
 
 
 
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