http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
An Improved Haze Removal Algorithm Based on Genetic Fuzzy Clustering
Xiaoguang Li,Huiying Huang 보안공학연구지원센터 2015 International Journal of Hybrid Information Techno Vol.8 No.8
Aiming at the degeneration phenomenon of images taken in mist, according to the features of the degraded images, an improved haze removal algorithm based on genetic fuzzy clustering is presented in this paper after analyzing its defects and shortcomings. Firstly, the improved atmospheric scattering model is established. Secondly, the original image is converted into a standard image through the improved model, and then we present a new multi-scale image edge detection by genetic fuzzy clustering, Based on this observation, we can use the multi-scale image edge detection to estimate the haze thickness directly and recover a high quality haze-free image. The new algorithm uses good global search ability of the genetic algorithm, which will implement the transfer from the scene defogging problem into the optimal estimation problem under global contrast optimal point. Compared with other algorithms for degraded images, the improved haze removal algorithm not only detects image edge precisely, but also has better performance in situations of dense haze. Theoretical analysis and experimental results demonstrate that, the new algorithm improved in this paper are effective for removal of fog-degraded images, and can be applied to the practical situations.
Level Set Based Path Planning Using a Novel Path Optimization Algorithm for Robots
Xiaoguang Zhang,Wei Zhang,Hui Li,Mingqin Liu,류성기 한국정밀공학회 2018 International Journal of Precision Engineering and Vol.19 No.9
In order to decrease the path length and control the minimum distance between the path and the obstacles when the level set based path planning algorithm is adopted , a new path optimization algorithm named elastic particle is proposed in this paper. Firstly, the iteration expression of optimization algorithm is deduced by active contour theory. Secondly, to ensure the convergence of algorithm, the relation among each item in the algorithm expression is analyzed and its convergence condition is determined. At last, level set algorithm is improved so that the smoothness of the initial path and the convergence speed of the algorithm are improved. In addition, a method named the nearest boundary distance is put forward to accelerate the operation speed of the algorithm. What’s more, memory pool and binary sort tree are adopted in the code to further reduce the running time of this algorithm. The optimal values of the algorithm parameters are analyzed via the simulation experiment,and its result demonstrates that the new algorithm has greatly optimized the path of algorithm-level set and guaranteed fast running speed and high reliability.
( Xiaoguang Li ),( Qian Zhang ),( Longzhan Gan ),( Guangyang Jiang ),( Yongqiang Tian ),( Bi Shi ) 한국미생물 · 생명공학회 2022 Journal of microbiology and biotechnology Vol.32 No.1
This study is the first report on production and characterization of the enzyme from an Ornithinibacillus species. A 4.2-fold increase in the extracellular protease (called L9<sup>T</sup>) production from Ornithinibacillus caprae L9<sup>T</sup> was achieved through the one-factor-at-a-time approach and response surface methodological optimization. L9T protease exhibited a unique protein band with a mass of 25.9 kDa upon sodium dodecyl sulfate-polyacrylamide gel electrophoresis. This novel protease was active over a range of pH (4-13), temperatures (30-80℃) and salt concentrations (0-220 g/l), with the maximal activity observed at pH 7, 70℃ and 20 g/l NaCl. Proteolytic activity was upgraded in the presence of Ag<sup>+</sup>, Ca<sup>2+</sup> and Sr<sup>2+</sup>, but was totally suppressed by 5 mM phenylmethylsulfonyl fluoride, which suggests that this enzyme belongs to the serine protease family. L9<sup>T</sup> protease was resistant to certain common organic solvents and surfactants; particularly, 5 mM Tween 20 and Tween 80 improved the activity by 63 and 15%, respectively. More importantly, L9<sup>T</sup> protease was found to be effective in dehairing of goatskins, cowhides and rabbit-skins without damaging the collagen fibers. These properties confirm the feasibility of L9<sup>T</sup> protease in industrial applications, especially in leather processing.
Synthesis and Applications of One-Dimensional Porous Nanowire Arrays: A Review
Xiaoguang Wang,Guanshui Ma 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2015 NANO Vol.10 No.1
In recent years, particular attention has been drawn to one-dimensional (1D) porous nanowires due to their high surface-to-volume ratios as well as the as-revealed excellent performance in varieties of applications. This review begins with a wide introduction to the as-reported various preparation methods for the typical 1D porous nanowires mainly consisting of template-free method (i.e., chemical etching, chemical vapor deposition, hydrothermal, electrospinning, gassolid reaction, etc.) and template-assisted method (i.e., using hard template and soft template, respectively). Based on the classification of design and preparation strategies, the as-evolved various nonmetallic and metallic 1D nanoporous materials with varied microstructural features have been highlighted, followed by the corresponding description and discussion on their typical applications in catalysis, sensors, rechargeable batteries, solar cells, super-capacitors, water treatment, random lasers and so forth.
Value sharing results of a meromorphic function f(z) and f(qz)
Xiaoguang Qi,Kai Liu,Lianzhong Yang 대한수학회 2011 대한수학회보 Vol.48 No.6
In this paper, we investigate sharing value problems related to a meromorphic function f(z) and f(qz), where q is a non-zero constant. It is shown, for instance, that if f(z) is zero-order and shares two valves CM and one value IM with f(qz), then f(z)=f(qz).
Mechanism of crack propagation for K9 glass
Xiaoguang Guo,Yutong Shi,Xichun Luo,Renke Kang,Zhuji Jin,Fei Ding,Zhipeng Li 한국정밀공학회 2019 International Journal of Precision Engineering and Vol.20 No.5
In order to study the mechanism of crack propagation, the varied cutting-depth scratch experiment is carried out and smoothed particle hydrodynamics (SPH) simulation method is used to assistant the investigation. The SPH simulation results reveal that crack will propagate in the direction where stress concentration exceeds the fracture toughness of K9 glass. The initial crack length in critical transition depth is calculated by combining the critical stress of fracture and the fracture toughness of K9 glass. Based on the effective plastic strain, the relation between scratching depth and crack depth is obtained. The recovery of crack tip is found and explained from the relationship between cutting depth and crack depth. Using the energy balance theory of Griffith, the variation of material internal energy is revealed. Comparing the scratching forces obtained from experiment and simulation, the validity of simulation results is verified. The phenomenon of crack delayed propagation is found in both experiment and simulation. The explanation of mechanism is given.
Wireless Network Health Information Retrieval Method Based on Data Mining Algorithm
Xiaoguang Guo 한국정보처리학회 2023 Journal of information processing systems Vol.19 No.2
In order to improve the low accuracy of traditional wireless network health information retrieval methods, awireless network health information retrieval method is designed based on data mining algorithm. The invalidhealth information stored in wireless network is filtered by data mapping, and the health information is clusteredby data mining algorithm. On this basis, the high-frequency words of health information are classified to realizewireless network health information retrieval. The experimental results show that exactitude of design way issignificantly higher than that of the traditional method, which can solve the problem of low accuracy of thetraditional wireless network health information retrieval method.
Xiaoguang Wang 인하대학교 국제관계연구소 2019 Pacific Focus Vol.34 No.2
Based on the background of Chinese oil politics under Xi Jinping, this arti-cle studies the“structural power of business”to test the concept within theeconomic system of state capitalism. Many elements of structural powerdiscourse are valid, such as the political influence of business, the role ofinformation-expertise, the role of business competitiveness andfluidity, andthe effect of external factors. However, the dominance and mechanism ofthe structural power of Chinese national oil companies presents differentlybecause of the unique state-business relations in the Chinese oil sector.