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Research on an Improved Ant Colony Optimization Algorithm for Solving Traveling Salesmen Problem
Wenli Lei,Fubao Wang 보안공학연구지원센터 2016 International Journal of Database Theory and Appli Vol.9 No.9
In order to improve the search result and low evolution speed, and avoid the tendency towards stagnation and falling into the local optimum of ant colony optimization(ACO) in solving the complex function, the traditional ant colony optimization algorithm is analyzed in detail, an improved ant colony optimization(IWSMACO) algorithm based on information weight factor and supervisory mechanism is proposed in this paper. In the proposed IWSMACO algorithm, the information weight factor is added to the path selection and pheromone adjustment mechanisms in order to dynamically adjust path selection probability and randomly select the behavior rules for further intelligentializing the ant colony. The supervisory mechanism added the dynamic convergence criterion of supervisory distance and used the optimal pheromone update strategy to self-adaptively select the excellent ants for updating the pheromone trails, and improve the solution qualities of each iteration, better guide the later ants for learning. Finally, the proposed IWSMACO algorithm is carried out by 12 TSP instances. The simulation experiment results show that the proposed IWSMACO algorithm can not only avoid falling into the local optimum, but also enhance the convergence speed. And it takes on remarkable optimized ability and higher search accuracy.
( Wenli Xu ),( Jun Gao ),( Haoyue Zheng ),( Chaowen Yuan ),( Jinlong Hou ),( Liguo Zhang ),( Guoqing Wang ) 한국미생물생명공학회(구 한국산업미생물학회) 2019 Journal of microbiology and biotechnology Vol.29 No.10
Salmonella is a common zoonotic and foodborne pathogen that causes high morbidity and mortality in developing countries. In this study, we established and validated a polymerase spiral reaction (PSR) assay which targeted the conserved invasion gene (invA) of Salmonella by SYBR Green I indicator methods. Subsequently, assays for determination of the optimal conditions for optimal specificity and sensitivity of PSR were performed. We performed comprehensive evaluations using loop-mediated isothermal amplification (LAMP) and realtime PCR. A total number of 532 samples of daily food were analyzed by PSR. Twenty-seven bacterial strains were tested in the specificity assay, from which positive results were obtained only for 14-Salmonella strains. However, none of the 13 non-Salmonella strains was amplified. Similarly with LAMP and real-time PCR, the detection limit of the PSR assay was 50 CFU/ml. The PSR method was also successfully applied to evaluate the contamination with Salmonella in 532 samples of daily food, corroborating traditional culture method data. The novel PSR method is simple, sensitive, and rapid and provides new insights into the prevention and detection of foodborne diseases.
Research on an Improved Wireless Sensor Networks Effective Coverage Method
Wenli Lei,Fubao Wang 보안공학연구지원센터 2016 International Journal of Future Generation Communi Vol.9 No.11
An improved wireless sensor networks effective coverage method based on differential evolution algorithm is proposed in this paper, which using quadratic interpolation method to improve the algorithm performance to further optimize the effective coverage of wireless sensor network nodes. Simulation results show that, compared to DE algorithm, the new algorithm can improve local search capabilities, reduce the computational cost of the algorithm, accelerate standards DE convergence, improve the accuracy of solution, and has some reference value for optimization application of wireless sensor network.
One Dimensional Thaw Consolidation Behaviors with Periodical Thermal Boundaries
Wenli Wang,Lanmin Wang,Fan Yu,Qian Wang 대한토목학회 2016 KSCE JOURNAL OF CIVIL ENGINEERING Vol.20 No.4
In this paper, one dimensional thaw consolidation behaviors with periodical thermal boundaries were studied. A new numerical simulation method was proposed to implement thaw consolidation calculation. Thaw consolidation tests were conducted to verify the validity of new proposed method. It was proved that the simulated data have a good agreement with tested results. Due to the influence of periodical thermal boundary, Thaw Consolidation Degree (TCD) changes periodically, which is the most significant difference from that of constant thermal boundary problems. At the same time, peak values of TCD in each freeze-thaw cycle decreases continuously with time and tends to be the value of TCD0 obtained from constant thermal boundary, which is equal to the corresponding average temperature of periodical thermal boundary. The attenuation process of TCD is proportionally related to thaw consolidation Ratio (R).