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A Multi-strategy Improved Snake Optimizer Assisted with Population Crowding Analysis for Engineering Design Problems

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Journal of Bionic Engineering 2024年第3期21卷 1567-1591页

作者： Lei Peng Zhuoming Yuan guangming dai Maocai Wang Jian Li Zhiming Song Xiaoyu Chen School of Computer Science China University of GeosciencesWuhan430074China Hubei Key Laboratory of Intelligent Geo-Information Processing China University of GeosciencesWuhan430074China China Astronautics Standards Institute Beijing100071China

Snake Optimizer(SO)is a novel Meta-heuristic Algorithm(MA)inspired by the mating behaviour of snakes,which has achieved success in global numerical optimization problems and practical engineering ***,it also has certain drawbacks for the exploration stage and the egg hatch process,resulting in slow convergence speed and inferior solution *** address the above issues,a novel multi-strategy improved SO(MISO)with the assistance of population crowding analysis is proposed in this *** the algorithm,a novel multi-strategy operator is designed for the exploration stage,which not only focuses on using the information of better performing individuals to improve the quality of solution,but also focuses on maintaining population *** boost the efficiency of the egg hatch process,the multi-strategy egg hatch process is proposed to regenerate individuals according to the results of the population crowding *** addition,a local search method is employed to further enhance the convergence speed and the local search *** is first compared with three sets of algorithms in the CEC2020 benchmark functions,including SO with its two recently discussed variants,ten advanced MAs,and six powerful CEC competition *** performance of MISO is then verified on five practical engineering design *** experimental results show that MISO provides a promising performance for the above optimization cases in terms of convergence speed and solution quality.

关键词： Snake optimizer Multi-strategy Population crowding analysis Engineering design problem

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Modified enzymatic collagen digestion-mediated isolation of osteocytes

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BIOCELL 2022年第4期46卷 1097-1104页

作者： WENJUAN XU guangming dai YIFEI LYU YINING ZHANG XIAOLIN TU Institute of Life and Science Research Chongqing Medical UniversityChongqing400016China Department of Bioengineering University of WashingtonSeattle98195USA

This study established a method for isolating large numbers of high-purity osteocytes from high-density *** fragments derived from mice tibia and femurs were alternately digested with type I collagenase and EDTA nine times,and the digested cells and bone chips(BC)were cultured,digested,and passaged when cells were fully *** types of cells obtained were identified by morphology,viable cell counts,alkaline phosphatase staining,and biochemical activity analyses,and specific osteocyte and osteoblast markers were evaluated by quantitative real-time polymerase chain *** results showed that among the cells obtained from the third digestion(fractions 7–9)of wild mice tibias and femurs and the remaining BCs,85%–90%of the cells were ***,their morphology was approximately one-tenth to one-fifth the size of osteoblasts,star-shaped or polygonal,with a dendritic structure,negative for alkaline phosphatase staining,and showed a high expression of dmp1 and *** percent of the cells in fractions 1–3 were osteoblasts,and were fusiform or polygonal *** activity of osteoblast-specific alkaline phosphatase and mRNA expression were high in this fraction,while the expression of osteocyte-specific dmp1 and sclerostin was not *** the second portion(fractions 4–6),a large number were osteoblasts,mixed with a small number of osteocytes,and had high alkaline phosphatase activity and osteocyte mRNA levels,a specific level of the osteocyte marker dmp1,and no sclerostin was *** in daβcatot mice were also successfully isolated by this method,and we found that Wnt signaling increased the proliferation of these *** proposed method can be used to culture osteocytes and osteoblasts of high purity and can be used for isolation and culture of these two kinds of cells from high-density bone,which provides an avenue for the study of osteocyte function in vitro.

关键词： Osteocytes Cell culture Collagen protease Sclerostin Alkaline phosphatase

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Data-Driven Collaborative Scheduling Method for Multi-Satellite Data-Transmission

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Tsinghua Science and Technology 2024年第5期29卷 1463-1480页

作者： Xiaoyu Chen Weichao Gu guangming dai Lining Xing Tian Tian Weilai Luo Shi Cheng Mengyun Zhou School of Computer Science China University of GeosciencesWuhan 430074China School of Electronic Engineering Xidian UniversityXi’an 710071China School of Computer Science Shaanxi Normal UniversityTaiyuan 710119China

With continuous expansion of satellite applications,the requirements for satellite communication services,such as communication delay,transmission bandwidth,transmission power consumption,and communication coverage,are becoming *** paper first presents an overview of the current development status of Low Earth Orbit(LEO)satellite constellations,and then conducts a demand analysis for multi-satellite data transmission based on LEO satellite *** problem is described,and the challenges and difficulties of the problem are analyzed *** this basis,a multi-satellite data-transmission mathematical model is then *** classical heuristic allocating strategies on the features of the proposed model,with the reinforcement learning algorithm Deep Q-Network(DQN),a two-stage optimization framework based on heuristic and DQN is ***,by taking into account the spatial and temporal distribution characteristics of satellite and facility resources,a multi-satellite scheduling instance dataset is *** results validate the rationality and correctness of the DQN algorithm in solving the collaborative scheduling problem of multi-satellite data transmission.

关键词： relay satellite scheduling data transmission Deep Q-Network(DQN) Genetic Algorithm(GA)

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Osteogenic and antibacterial dual functions of a novel levofloxacin loaded mesoporous silica microspheres/nano-hydroxyapatite/ polyurethane composite scaffold

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Genes & Diseases 2021年第2期8卷 193-202页

作者： Zhiping Kuang guangming dai Ruijie Wan Dongli Zhang Chen Zhao Cheng Chen Jidong Li Hongchen Gu Wei Huang Department of Orthopedic Surgery The First Affiliated Hospital of Chongqing Medical UniversityChongqing400016PR China Department of Orthopaedic Surgery Chongqing Traditional Chinese Medicine HospitalChongqing400011PR China Research Center for Nano-Biomaterials Analytical&Testing CenterSichuan UniversityChengduSichuan Province610065PR China State Key Laboratory of Oncogenes and Related Genes School of Biomedical EngineeringMed-X Research InstituteShanghai Jiaotong UniversityShanghai200240PR China

Lev/MSNs/n-HA/PU has been proved to be a novel scaffold material to treat bone defect caused by chronic *** have previously identified that this material can effectively treat chronic osteomyelitis caused by Staphylococcus aureus in ***,the potential mechanisms of antibacterial and osteogenic induction properties remain ***,for osteogenesis property,immunohistochemistry,PCR,and Western blot were performed to detect the expression of osteogenic ***,flow cytometry and TUNEL were applied to analyze MC3T3-E1 proliferation and *** antibacterial property,the material was co-cultivated with bacteria,bacterial colony forming units was counted and the release time of the effective levofloxacin was assayed by agar disc-diffusion ***,scanning electron microscope was applied to observe adhesion of *** terms of osteogenic induction,we found BMSCs adherently grew more prominently on Lev/MSNs/n-HA/***/MSNs/n-HA/PU also enhanced the expression of osteogenic markers including OCN and COL1a1,as well as effectively promoted the transition from G1 phase to G2 ***,Lev/MSNs/n-HA/PU could reduce apoptosis of ***,both Lev/MSNs/n-HA/PU and n-HA/PU materials could inhibit bacterial colonies,while Lev/MSNs/n-HA/PU possessed a stronger antibacterial activities,and lower bacterial adhesion than n-HA/*** results illustrated that Lev/MSNs/n-HA/PU composite scaffold possess favorable compatibility in vitro,which induce osteogenic differentiation of MSCs,promote proliferation and differentiation of MC3T3-E1,and inhibit ***,clear in vitro antibacterial effect of Lev/MSNs/n-HA/PU was also *** summary,this study replenishes the potential of Lev/MSNs/n-HA/PU composite scaffold possess dual functions of anti-infection and enhanced osteogenesis for future clinical application.

关键词： Antibacterial Composite scaffold Levofloxacin Nanobiomaterial Osteogenesis

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An Efficient Method of Generating Parameters for Pairing-Based Cryptosystems

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China Communications 2010年第4期7卷 167-171页

作者： WANG Maocai dai guangming PEN Lei ZHEN Chang QIN Ruijie School of Computer China University of Geosciences Wuhan 430074 China

Efficient computation of Tate pairing is a crucial factor for practical applications of pairing-based cryptosystems(PBC).Recently,there have been many improvements for the computation of Tate pairing,which focuses on the arithmetical operations above the finite *** this paper,we analyze the structure of Miller’s algorithm firstly,which is used to implement Tate *** on the characteristics that Miller’s algorithm will be improved tremendous if the order of the subgroup of elliptic curve group is low hamming prime,a new method for generating parameters for PBC is put forward,which enable it feasible that there is certain some subgroup of low hamming prime order in the elliptic curve group ***,we analyze the computation efficiency of Tate pairing using the new parameters for PBC and give the test *** is clear that the computation of Tate pairing above the elliptic curve group generating by our method can be improved tremendously.

关键词： Pairing-based Cryptosystems Miller's Algorithm Tate Pairing Low Hamming Elliptic Curve

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基于PVM的微机网络并行计算及其应用

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计算机工程与应用 2000年第9期36卷 154-156页

作者：戴光明戴晓明华中理工大学计算机学院安徽电建一公司信息中心

文章叙述了在微机网络条件下通过ＬＩＮＵＸ＋ＰＶＭ构造并行处理环境的途径和方法，通过实例探讨了微机网络并行计算中一些技术问题及解决办法，最后给出了微机网络并行计算需要进一步研究的课题。

关键词：微机网络并行计算 LINUX PVM

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凸多边形最小面积四边形包围盒算法

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华中科技大学学报（自然科学版） 2006年第6期34卷 71-73页

作者：戴光明王茂才彭雷中国地质大学计算机学院湖北武汉430074

针对凸多边形的最小面积四边形包围盒问题进行研究,通过数学推导证明,得出了凸多边形的最小面积四边形包围盒的四边都是多共点边,或三边是多共点边而另一边(单共点边)中点与凸多边形的一顶点重合等一系列结论.依据此结论设计了时间复杂... 详细信息

针对凸多边形的最小面积四边形包围盒问题进行研究,通过数学推导证明,得出了凸多边形的最小面积四边形包围盒的四边都是多共点边,或三边是多共点边而另一边(单共点边)中点与凸多边形的一顶点重合等一系列结论.依据此结论设计了时间复杂度为O(n4)的算法,依据本算法可以构造出凸多边形面积最小的凸四边形包围盒,而且其算法的复杂度仅与凸多边形的边数n相关,是多项式级的复杂度.运算实例表明了算法的正确性和有效性.

关键词：凸多边形最小四边形包围盒多共点边

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基于多重分形主曲线模型多目标演化算法研究

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计算机研究与发展 2011年第9期48卷 1729-1739页

作者：张冬梅龚小胜戴光明中国地质大学计算机学院武汉430074

为了克服目前模型多目标演化算法多采用PCA,local PCA等线性建模方法,存在模型拟合效果不理想、对建模参数敏感等问题,提出一种基于多重分形的主曲线模型多目标演化算法(multifractalbased principal curve multi-objective evolutionar... 详细信息

为了克服目前模型多目标演化算法多采用PCA,local PCA等线性建模方法,存在模型拟合效果不理想、对建模参数敏感等问题,提出一种基于多重分形的主曲线模型多目标演化算法(multifractalbased principal curve multi-objective evolutionary algorithm,MFPC-MOEA).算法采用主曲线方法对解集分布进行非线性建模,通过建立种群个体分布概率模型,生成目标空间均匀分布的个体,保证优化结果的多样性.另外算法通过多重分形方法分析个体在解集空间中的分布,设计了基于多重分形谱的模型演化多目标算法建模开始评测标准,同时采用多重分形方法评估算法收敛程度,设计相关的演化多目标优化算法停止策略.新算法采用国际公认的ZDT,DTLZ测试函数进行实验验证,并与NSGA-II,MOEA/D,PAES,SPEA2,RM-MEDA经典演化多目标优化算法进行了实验比较.实验结果表明,该算法在HV,SPREAD,IGD,EPSILON性能指标上均有较好的表现.说明通过引入多重分形策略和主曲线建模方法,在一定程度上提高了解的质量,为求解多目标优化问题提供新的思路.

关键词：多重分形模型多目标演化算法多重分形谱主曲线 MFPC—MOEA

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简化真实感地形中爬行路径设计的算法研究

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计算机工程与应用 2005年第18期41卷 45-47,206页

作者：杜安红戴光明安徽师范大学数学与计算机学院芜湖241000 中国地质大学计算机科学与技术系武汉430074

该文在概括三维路径设计的基础上给出了爬行路径的定义,并且指出了真实感地形中爬行路径规划与点状图中路径规划的区别。文章首先对问题进行了简化,重点是把地形中地物的形状简化成包围其边界的凸多边形包围盒,提出使用改进的Dijkstra... 详细信息

该文在概括三维路径设计的基础上给出了爬行路径的定义,并且指出了真实感地形中爬行路径规划与点状图中路径规划的区别。文章首先对问题进行了简化,重点是把地形中地物的形状简化成包围其边界的凸多边形包围盒,提出使用改进的Dijkstra算法解决问题思想,并且提出了构造包围盒顶点间关联矩阵的方法。实验结果表明,该方案总能得到简化问题的解,并从理论上证明了解的最优性,具有较大应用价值。

关键词：路径非点状图凸多边形包围盒关联矩阵 Dijkstra算法

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基于演化计算的最短避障路径算法设计

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计算机工程与应用 2005年第16期41卷 61-64页

作者：弓晨戴光明中国地质大学计算机系武汉430074

在工程应用、自动化、人工智能等诸多领域中有很多数学模型可以归结为寻求最短避障路径的问题。在环境模型的表达上,该文利用最小多边形包络法处理过的障碍物,即把障碍物描述成为多边形。在搜索策略上,利用演化算法求解TSP的算法——改... 详细信息

在工程应用、自动化、人工智能等诸多领域中有很多数学模型可以归结为寻求最短避障路径的问题。在环境模型的表达上,该文利用最小多边形包络法处理过的障碍物,即把障碍物描述成为多边形。在搜索策略上,利用演化算法求解TSP的算法——改进的郭涛算法的思想。针对TSP问题和最短避障路径问题的不同,在染色体的有效范围和基因的选取范围等处对算法进行修改,并且引入了基因库,成功地用演化算法解决了最短避障路径问题。

关键词：演化算法郭涛算法非法路径基因库最短避障路径

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