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Learner Phase of Partial Reinforcement Optimizer with Nelder-Mead Simplex for Parameter Extraction of Photovoltaic Models
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作者 Jinpeng Huang Zhennao Cai +3 位作者 Ali Asghar Heidari Lei Liu Huiling Chen Guoxi Liang 《Journal of Bionic Engineering》 CSCD 2024年第6期3041-3075,共35页
This paper proposes an improved version of the Partial Reinforcement Optimizer(PRO),termed LNPRO.The LNPRO has undergone a learner phase,which allows for further communication of information among the PRO population,c... This paper proposes an improved version of the Partial Reinforcement Optimizer(PRO),termed LNPRO.The LNPRO has undergone a learner phase,which allows for further communication of information among the PRO population,changing the state of the PRO in terms of self-strengthening.Furthermore,the Nelder-Mead simplex is used to optimize the best agent in the population,accelerating the convergence speed and improving the accuracy of the PRO population.By comparing LNPRO with nine advanced algorithms in the IEEE CEC 2022 benchmark function,the convergence accuracy of the LNPRO has been verified.The accuracy and stability of simulated data and real data in the parameter extraction of PV systems are crucial.Compared to the PRO,the precision and stability of LNPRO have indeed been enhanced in four types of photovoltaic components,and it is also superior to other excellent algorithms.To further verify the parameter extraction problem of LNPRO in complex environments,LNPRO has been applied to three types of manufacturer data,demonstrating excellent results under varying irradiation and temperatures.In summary,LNPRO holds immense potential in solving the parameter extraction problems in PV systems. 展开更多
关键词 Partial reinforcement optimizer Learner phase nelder-mead simplex algorithm Parameter extraction
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Optimization of a Single Flash Geothermal Power Plant Powered by a Trans-Critical Carbon Dioxide Cycle Using Genetic Algorithm and Nelder-Mead Simplex Method
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作者 Yashar Aryanfar Jorge Luis García Alcaraz 《Energy Engineering》 EI 2023年第2期263-275,共13页
The usage of renewable energies,including geothermal energy,is expanding rapidly worldwide.The low efficiency of geothermal cycles has consistently highlighted the importance of recovering heat loss for these cycles.T... The usage of renewable energies,including geothermal energy,is expanding rapidly worldwide.The low efficiency of geothermal cycles has consistently highlighted the importance of recovering heat loss for these cycles.This paper proposes a combined power generation cycle(single flash geothermal cycle with trans-critical CO_(2) cycle)and simulates in the EES(Engineering Equation Solver)software.The results show that the design parameters of the proposed system are significantly improved compared to the BASIC single flash cycle.Then,the proposed approach is optimized using the genetic algorithm and the Nelder-Mead Simplex method.Separator pressure,steam turbine output pressure,and CO_(2) turbine inlet pressure are three assumed variable parameters,and exergy efficiency is the target parameter.In the default operating mode,the system exergy efficiency was 32%,increasing to 39%using the genetic algorithm and 37%using the Nelder-Mead method. 展开更多
关键词 OPTIMIZATION GEOTHERMAL genetic algorithm nelder-mead simplex exergy efficiency
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Solution of Stochastic Quadratic Programming with Imperfect Probability Distribution Using Nelder-Mead Simplex Method
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作者 Xinshun Ma Xin Liu 《Journal of Applied Mathematics and Physics》 2018年第5期1111-1119,共9页
Stochastic quadratic programming with recourse is one of the most important topics in the field of optimization. It is usually assumed that the probability distribution of random variables has complete information, bu... Stochastic quadratic programming with recourse is one of the most important topics in the field of optimization. It is usually assumed that the probability distribution of random variables has complete information, but only part of the information can be obtained in practical situation. In this paper, we propose a stochastic quadratic programming with imperfect probability distribution based on the linear partial information (LPI) theory. A direct optimizing algorithm based on Nelder-Mead simplex method is proposed for solving the problem. Finally, a numerical example is given to demonstrate the efficiency of the algorithm. 展开更多
关键词 STOCHASTIC QUADRATIC PROGRAMMING LPI nelder-mead
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Hybrid Improved Self-adaptive Differential Evolution and Nelder-Mead Simplex Method for Solving Constrained Real-Parameters
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作者 Ngoc-Tam Bui Hieu Pham Hiroshi Hasegawa 《Journal of Mechanics Engineering and Automation》 2013年第9期551-559,共9页
In this paper, a new hybrid algorithm based on exploration power of a new improvement self-adaptive strategy for controlling parameters in DE (differential evolution) algorithm and exploitation capability of Nelder-... In this paper, a new hybrid algorithm based on exploration power of a new improvement self-adaptive strategy for controlling parameters in DE (differential evolution) algorithm and exploitation capability of Nelder-Mead simplex method is presented (HISADE-NMS). The DE has been used in many practical cases and has demonstrated good convergence properties. It has only a few control parameters as number of particles (NP), scaling factor (F) and crossover control (CR), which are kept fixed throughout the entire evolutionary process. However, these control parameters are very sensitive to the setting of the control parameters based on their experiments. The value of control parameters depends on the characteristics of each objective function, therefore, we have to tune their value in each problem that mean it will take too long time to perform. In the new manner, we present a new version of the DE algorithm for obtaining self-adaptive control parameter settings. Some modifications are imposed on DE to improve its capability and efficiency while being hybridized with Nelder-Mead simplex method. To valid the robustness of new hybrid algorithm, we apply it to solve some examples of structural optimization constraints. 展开更多
关键词 Differential evolution hybrid algorithms evolutionary computation global search local search simplex method.
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基于NELDER-MEAD算法的SAR等效雷达速度估计方法
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作者 汪瑜 刘保昌 +3 位作者 何宜军 耿旭朴 项海兵 乔思奇 《现代雷达》 北大核心 2025年第4期29-37,共9页
等效雷达速度是实现合成孔径雷达(SAR)成像的重要参数,可直接影响到SAR图像的聚焦效果。目前可通过轨道、姿态数据估计出等效雷达速度,但数据难获取,而通过SAR回波数据利用已有的自聚焦技术估计等效雷达速度又存在精度不高,速度慢等问... 等效雷达速度是实现合成孔径雷达(SAR)成像的重要参数,可直接影响到SAR图像的聚焦效果。目前可通过轨道、姿态数据估计出等效雷达速度,但数据难获取,而通过SAR回波数据利用已有的自聚焦技术估计等效雷达速度又存在精度不高,速度慢等问题。文中提出基于NELDER-MEAD搜索算法的SAR等效雷达速度估计方法,该方法利用图像对比度与最优化理论,通过搜索某个速度值使得SAR图像的对比度最大化,进而估计出等效雷达速度。该方法不指定搜索范围,可以在宽松的初始值下快速估计出稳定的、准确的等效雷达速度,实现较高精度的SAR成像。为星载SAR等效雷达速度的估计提供了可靠的求解方法和思路,在实践层面对研究SAR成像精度具有实际的应用价值。 展开更多
关键词 nelder-mead算法 等效雷达速度估计 SAR成像 最优化理论
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一种基于改进Simplex噪声的虚拟地形生成方法
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作者 沈博 张健钦 +1 位作者 马帅豹 文政 《系统仿真学报》 北大核心 2025年第10期2605-2612,共8页
针对传统虚拟地形生成方法存在的计算复杂度高、生成速度慢、真实感不足等问题,提出了一种基于改进Simplex噪声的虚拟地形生成方法。利用Simplex噪声计算效率高、硬件开销低、随机性更自然等优势,构建基础地形模板;引入分形算法,通过多... 针对传统虚拟地形生成方法存在的计算复杂度高、生成速度慢、真实感不足等问题,提出了一种基于改进Simplex噪声的虚拟地形生成方法。利用Simplex噪声计算效率高、硬件开销低、随机性更自然等优势,构建基础地形模板;引入分形算法,通过多频率、多振幅的噪声叠加增强地形细节层次;结合湍流算法,增加随机扰动和复杂性,从而进一步提高地形的自然感和多样性。仿真结果表明:该方法在地形生成效率、真实感,以及多样性方面均优于传统生成方法。 展开更多
关键词 虚拟地形 simplex噪声 分形算法 湍流算法 改进simplex
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基于Nelder-Mead和遗传算法的结构动力学模型修正分析 被引量:1
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作者 隋鑫 张迪 +1 位作者 马志赛 马之馨 《强度与环境》 2025年第2期41-47,共7页
模型修正作为航天飞行器弹性设计的重要环节,在结构动力学模型优化方面已广泛应用。确定性结构动力学模型修正方法包括传统算法和智能算法,计算机智能算法的应用使得计算效率大幅提升,其中Nelder-Mead算法作为寻找无约束多变量最小值的... 模型修正作为航天飞行器弹性设计的重要环节,在结构动力学模型优化方面已广泛应用。确定性结构动力学模型修正方法包括传统算法和智能算法,计算机智能算法的应用使得计算效率大幅提升,其中Nelder-Mead算法作为寻找无约束多变量最小值的算法已广泛应用,而典型的智能优化算法还包括遗传算法、粒子群算法等。工程设计中,动力学模型修正通常占用大量的计算时间和资源,因此,选取合适的模型修正算法是工程上亟待解决的问题。本文提出合理化模型修正的步骤,并以某型飞行器的模态参数为研究对象,建立动力学有限元模型;结合模态试验数据,讨论遗传算法和Nelder-Mead算法在实现动力学模型修正的计算过程;通过对比,得出遗传算法和Nelder-Mead算法在收敛速度与拟合效果上的优劣。 展开更多
关键词 遗传算法 nelder-mead算法 模型修正
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Interleukin 1βreceptor and synaptic dysfunction in recurrent brain infection with Herpes simplex virus type-1
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作者 Roberto Piacentini Claudio Grassi 《Neural Regeneration Research》 SCIE CAS 2025年第2期416-423,共8页
Several experimental evidence suggests a link between brain Herpes simplex virus type-1 infection and the occurrence of Alzheimer’s disease.However,the molecular mechanisms underlying this association are not complet... Several experimental evidence suggests a link between brain Herpes simplex virus type-1 infection and the occurrence of Alzheimer’s disease.However,the molecular mechanisms underlying this association are not completely understood.Among the molecular mediators of synaptic and cognitive dysfunction occurring after Herpes simplex virus type-1 infection and reactivation in the brain neuroinflammatory cytokines seem to occupy a central role.Here,we specifically reviewed literature reports dealing with the impact of neuroinflammation on synaptic dysfunction observed after recurrent Herpes simplex virus type-1 reactivation in the brain,highlighting the role of interleukins and,in particular,interleukin 1βas a possible target against Herpes simplex virus type-1-induced neuronal dysfunctions. 展开更多
关键词 herpes simplex virus type 1 interleukin MICROGLIA NEUROINFLAMMATION synaptic dysfunction
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Herpes simplex virus 2-induced aseptic meningitis presenting with sudden deafness:A case report
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作者 Yuan-Cheng Liu Shih-Hsuan Hsiao Peir-Rong Chen 《World Journal of Clinical Cases》 SCIE 2025年第8期22-25,共4页
BACKGROUND Aseptic meningitis is defined as meningeal inflammation caused by various etio-logies with negative cerebrospinal fluid(CSF)bacterial culture.The most common etiologies are viruses[enteroviruses,arboviruses... BACKGROUND Aseptic meningitis is defined as meningeal inflammation caused by various etio-logies with negative cerebrospinal fluid(CSF)bacterial culture.The most common etiologies are viruses[enteroviruses,arboviruses,and herpes simplex virus type 2(HSV-2)].Aseptic meningitis can have various presentations,including sensori-neural deafness.While sensorineural deafness from mumps meningoencephalitis has been reported,cases of HSV-2-induced hearing loss are rare.Herein,we re-port a case of HSV-2-induced meningitis that presented with sudden deafness.CASE SUMMARY A 68-year-old man experienced a profound sudden onset of left-sided hearing loss for one day.Pure-tone audiograms demonstrated sudden left-sided sensorineural hearing loss(thresholds 80-90 dB).After treatment with high-dose steroids for 1 week,he experienced an acute consciousness change with left hemiparesis.The laboratory data showed no significant abnormalities.Brain computed tomography without contrast and magnetic resonance imaging revealed no intracranial hemo-rrhage or obvious brain lesion.The CSF analysis and the Multiplex PCR panels showed HSV-2 positivity.Hence,under the diagnosis of herpes meningoenceph-alitis,acyclovir was prescribed and his symptoms gradually resolved.CONCLUSION This case report further demonstrates that a viral infection could be a cause of sudden sensorineural hearing loss. 展开更多
关键词 Aseptic meningitis Type 2 herpes simplex Sudden sensorineural hearing loss IMMUNOCOMPROMISED Cerebrospinal fluid Case report
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Quercetin inhibits herpes simplex virus 1 replication in corneal epithelium and suppresses keratitis progression
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作者 Yubin Yu Sihao Liu +2 位作者 Qinghua Liu Xiuping Liu Kaili Wu 《Virologica Sinica》 2025年第4期647-657,共11页
Quercetin is a natural compound with potent antiviral effects;however,its role in the treatment of herpes simplex keratitis(HSK)remains underexplored.Here,we investigated the antiviral effects of quercetin against her... Quercetin is a natural compound with potent antiviral effects;however,its role in the treatment of herpes simplex keratitis(HSK)remains underexplored.Here,we investigated the antiviral effects of quercetin against herpes simplex virus 1(HSV-1).By examining different phases of viral infection in human corneal epithelial cells(HCECs),we found that 30μmol/L quercetin inhibits HSV-1 replication primarily by disrupting viral attachment.RNA-sequencing and subsequent analyses revealed that the nuclear factor E2-related factor 2(Nrf2)was upregulated by quercetin in a dose-dependent manner.Knocking down Nrf2 partially compromised quercetin's antiviral effect.Importantly,topical application of 100μmol/L quercetin alleviated HSK severity in mice,reduced viral titers in tears,and inhibited VP16 expression in the cornea and trigeminal ganglia.These findings demonstrate the antiviral effect of quercetin against HSV-1 and provide a foundation for mechanistic studies to elucidate its therapeutic potential in HSK. 展开更多
关键词 QUERCETIN Herpes simplex virus type 1(HSV-1) Herpes simplex keratitis(HSK) Nrf2 ANTIVIRAL
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基于Nelder-Mead的光储一体化系统转换效率和储能容量协调优化研究
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作者 武林 李慧斌 《光学与光电技术》 2025年第5期124-133,共10页
随着全球对可再生能源需求的日益增长,光储一体化系统作为一种重要的能源转换和储存技术,备受关注。然而,如何在保证高效能量转换的同时,优化储能能力,仍然是一个亟待解决的挑战。提出了一种基于光纤耦合与热光电技术的光储一体化系统... 随着全球对可再生能源需求的日益增长,光储一体化系统作为一种重要的能源转换和储存技术,备受关注。然而,如何在保证高效能量转换的同时,优化储能能力,仍然是一个亟待解决的挑战。提出了一种基于光纤耦合与热光电技术的光储一体化系统的优化策略,利用光纤集中器与菲涅尔透镜实现太阳能的高效聚集与传输,并通过光谱选择性滤光器减少辐射损失,提高光伏电池的能量转换效率。通过优化系统中的几何参数、光伏电池的能带间隙以及光谱选择性滤光器的截止能量,并采用Nelder-Mead算法对上述参数进行迭代优化。实验表明,在5倍太阳光浓缩比和相变材料长度为10 cm的条件下,系统的能量转换效率从27.5%提高到30.7%,同时储能能力保持在82%。这些研究成果为未来光储一体化系统的高效能量转换与储能提供了理论支持和工程实践价值。 展开更多
关键词 光储一体化系统 热光电 光纤集中器 nelder-mead算法 光谱选择性滤光器
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Herpes simplex keratitis:A brief clinical overview 被引量:5
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作者 Mutali Musa Ehimare Enaholo +4 位作者 Gladness Aluyi-Osa George Nnamdi Atuanya Leopoldo Spadea Carlo Salati Marco Zeppieri 《World Journal of Virology》 2024年第1期5-32,共28页
The aim of our minireview is to provide a brief overview of the diagnosis,clinical aspects,treatment options,management,and current literature available regarding herpes simplex keratitis(HSK).This type of corneal vir... The aim of our minireview is to provide a brief overview of the diagnosis,clinical aspects,treatment options,management,and current literature available regarding herpes simplex keratitis(HSK).This type of corneal viral infection is caused by the herpes simplex virus(HSV),which can affect several tissues,including the cornea.One significant aspect of HSK is its potential to cause recurrent episodes of inflammation and damage to the cornea.After the initial infection,the HSV can establish a latent infection in the trigeminal ganglion,a nerve cluster near the eye.The virus may remain dormant for extended periods.Periodic reactivation of the virus can occur,leading to recurrent episodes of HSK.Factors triggering reactivation include stress,illness,immunosuppression,or trauma.Recurrent episodes can manifest in different clinical patterns,ranging from mild epithelial involvement to more severe stromal or endothelial disease.The severity and frequency of recurrences vary among individuals.Severe cases of HSK,especially those involving the stroma and leading to scarring,can result in vision impairment or even blindness in extreme cases.The cornea's clarity is crucial for good vision,and scarring can compromise this,potentially leading to visual impairment.The management of HSK involves not only treating acute episodes but also implementing long-term strategies to prevent recurrences and attempt repairs of corneal nerve endings via neurotization.Antiviral medications,such as oral Acyclovir or topical Ganciclovir,may be prescribed for prophylaxis.The immune response to the virus can contribute to corneal damage.Inflammation,caused by the body's attempt to control the infection,may inadvertently harm the corneal tissues.Clinicians should be informed about triggers and advised on measures to minimize the risk of reactivation.In summary,the recurrent nature of HSK underscores the importance of both acute and long-term management strategies to preserve corneal health and maintain optimal visual function. 展开更多
关键词 Herpes simplex virus Herpes simplex keratitis ACYCLOVIR NEUROTIZATION REACTIVATION
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Study on Joint Method of 3D Acoustic Emission Source Localization Simplex and Grid Search Scanning 被引量:1
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作者 Liu Wei-jian Wang Hao-nan +4 位作者 Xiao Yang Hou Meng-jie Dong Sen-sen Zhang Zhi-zeng Lu Gao-ming 《Applied Geophysics》 SCIE CSCD 2024年第3期456-467,617,共13页
Acoustic emission(AE)source localization is a fundamental element of rock fracture damage imaging.To improve the efficiency and accuracy of AE source localization,this paper proposes a joint method comprising a three-... Acoustic emission(AE)source localization is a fundamental element of rock fracture damage imaging.To improve the efficiency and accuracy of AE source localization,this paper proposes a joint method comprising a three-dimensional(3D)AE source localization simplex method and grid search scanning.Using the concept of the geometry of simplexes,tetrahedral iterations were first conducted to narrow down the suspected source region.This is followed by a process of meshing the region and node searching to scan for optimal solutions,until the source location is determined.The resulting algorithm was tested using the artificial excitation source localization and uniaxial compression tests,after which the localization results were compared with the simplex and exhaustive methods.The results revealed that the localization obtained using the proposed method is more stable and can be effectively avoided compared with the simplex localization method.Furthermore,compared with the global scanning method,the proposed method is more efficient,with an average time of 10%–20%of the global scanning localization algorithm.Thus,the proposed algorithm is of great significance for laboratory research focused on locating rupture damages sustained by large-sized rock masses or test blocks. 展开更多
关键词 acoustic emission simplex form grid search scan locating the epicenter
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Black Garlic as an Antiviral for Herpes Simplex Virus-2 in Lung Cells
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作者 Jenna R. Horowitz Lee H. Lee Sandra D. Adams 《Advances in Bioscience and Biotechnology》 CAS 2024年第1期70-89,共20页
Allicin, an antioxidant, is known for providing garlic with its unique fragrance and taste, as well as for its antimicrobial properties. Black garlic, a fermented form of garlic, contains higher levels of antioxidants... Allicin, an antioxidant, is known for providing garlic with its unique fragrance and taste, as well as for its antimicrobial properties. Black garlic, a fermented form of garlic, contains higher levels of antioxidants than fresh garlic. Antioxidants play a vital role in alleviating cellular stress during viral infections. Viral infections result in oxidative stress through the production of reactive oxidative species (ROS). A prolonged state of oxidative stress can result in cell death, DNA damage, and disease progression. In this study, black garlic extract (BGE) is evaluated for its ability to mitigate cytopathic effects and oxidative stress caused by herpes simplex virus-2 (HSV-2) infections in vitro. Antiviral assays were performed to determine the percent of viral inhibition resulting from treatment with the BGE. ROS-Glo<sup>TM</sup> H<sub>2</sub>O<sub>2</sub> assays were then completed to measure the post-infection ROS levels of BGE-treated virus and cells. The results thus far suggest that BGE may inhibit viral infection and decrease levels of oxidative stress. 展开更多
关键词 Black Garlic Herpes simplex Virus-2 ANTIOXIDANT ANTIVIRAL ALLICIN
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Bilateral meibomian gland morphological alterations in unilateral herpes simplex keratitis based on artificial intelligence analysis
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作者 Xin-Xin Yu Xue-Wen Chen +1 位作者 Qi Dai Shuang-Qing Wu 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2024年第12期2153-2157,共5页
AIM:To explore whether unilateral herpes simplex keratitis(HSK)can cause morphological changes of bilateral meibomian glands(MGs)based on artificial intelligence(AI)analytical system.METHODS:In the retrospective study... AIM:To explore whether unilateral herpes simplex keratitis(HSK)can cause morphological changes of bilateral meibomian glands(MGs)based on artificial intelligence(AI)analytical system.METHODS:In the retrospective study,29 patients with unilateral HSK and 29 participants matched in terms of age and sex were included as control group.Meibographic images of the upper eyelid using Keratograph 5M and assessed ocular surface parameters including tear meniscus height and tear break-up time.MG density and vagueness values were automatically analyzed and calculated using an AI analytical system.We compared the differences between the affected and the contralateral unaffected eyes in HSK patients,and the normal control eyes.We employed either the paired t-test or the Wilcoxon signed-rank test to compare significant difference between the affected and unaffected eyes in HSK patients or between the HSK group and control group.RESULTS:The MG density was 0.19±0.09 in the HSKaffected eye and 0.18±0.07 in contralateral unaffected eye,which had no significant difference(P=0.616).The MG density between the affected eye with HSK and the normal control group was statistically significant(P=0.028).There was a significant difference in MG density between the contralateral unaffected eye and the normal control group(P=0.012).However,no significant difference in vagueness value was observed between the eye with HSK and the control group or between HSK eye and contralateral eye.CONCLUSION:The MG density between the HSKaffected eye and the contralateral unaffected eye don’t significantly differ,whereas there is a significant decrease in the HSK group compared to that of the normal participants.Unilateral HSV keratitis may suffer from bilateral changes of MG morphology indicating bilateral dry eye.Therefore,the fellow eye of patients with unilateral HSK should be considered a potential case of MG dysfunction,necessitating early treatment for bilateral dry eye in the clinic. 展开更多
关键词 herpes simplex keratitis artificial intelligence meibomian gland morphology bilateral alterations
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二氢杨梅素自微乳配方的优化及表征 被引量:1
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作者 常大伟 曹佳怡 +4 位作者 姚芊 任娜 王虎玄 孙玉姣 沈文 《中国油脂》 北大核心 2025年第5期75-84,共10页
旨在提高二氢杨梅素(DMY)的生物利用度,制备了二氢杨梅素自微乳(DMY-SMES),通过DMY在辅料(油相、乳化剂和助乳化剂)中的溶解度及各辅料的相容性确定油相、乳化剂和助乳化剂,通过伪三元相图确定三者在自微乳中的比例,在此基础上,以粒径... 旨在提高二氢杨梅素(DMY)的生物利用度,制备了二氢杨梅素自微乳(DMY-SMES),通过DMY在辅料(油相、乳化剂和助乳化剂)中的溶解度及各辅料的相容性确定油相、乳化剂和助乳化剂,通过伪三元相图确定三者在自微乳中的比例,在此基础上,以粒径、多分散指数(PDI)和载药量为指标,通过单纯形网格法优化DMY-SMES的配方,并对最佳配方制备的DMY-SMES进行表征。结果表明:以中链甘油三酯(MCT)、吐温80和聚乙二醇400分别为油相、乳化剂和助乳化剂,DMY-SMES的最佳配方为10%MCT、60%吐温80、30%聚乙二醇400,在此条件下DMY-SMES的液滴平均粒径为14.46 nm,PDI为0.138,载药量为29.84 mg/g,包封率可达85.26%;最佳配方所得DMY-SMES为浅黄色澄清液体,乳滴呈类球形、粒径小、表面光滑,无团聚现象,为O/W型,自微乳及其稀释液的稳定性均较优;DMY-SMES的浊点为70℃;DMY-SMES在水、pH 1.2 HCl、pH 6.8磷酸盐缓冲液(PBS)中及在30 d的储藏期内(4℃),其液滴粒径和分布均无明显变化;DMY-SMES在水、pH 1.2 HCl、pH 6.8 PBS中的释放量明显高于游离DMY;在一定质量浓度下,DMY-SMES的DPPH和ABTS自由基清除能力强于游离DMY。综上,自微乳可提高DMY的溶解度,使其具有良好的生物相容性和稳定性,在食品工业和医药领域具有广阔的发展前景。 展开更多
关键词 二氢杨梅素 自微乳 单纯形网格法 体外释放
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黄芩素拮抗单纯疱疹病毒1型诱导的角膜新生血管生成的功能和机制研究
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作者 李昊洋 张风梅 +2 位作者 刘莉 刘会荣 杨舒然 《病毒学报》 北大核心 2025年第3期749-756,共8页
本研究的目的是探究黄芩素拮抗单纯疱疹病毒1型(Herpes simplex virus 1,HSV-1)诱导的角膜新生血管生成的功能和机制。将人脐静脉内皮细胞(Human umbilical vein endothelial cells,HUVECs)随机分为阴性对照(Mock)组、HSV-1组、黄芩素... 本研究的目的是探究黄芩素拮抗单纯疱疹病毒1型(Herpes simplex virus 1,HSV-1)诱导的角膜新生血管生成的功能和机制。将人脐静脉内皮细胞(Human umbilical vein endothelial cells,HUVECs)随机分为阴性对照(Mock)组、HSV-1组、黄芩素低剂量(25μmol·L^(-1))组、黄芩素高剂量(100μmol·L^(-1))组,除对照组外的其余各组细胞均用感染复数(MOI)为1的HSV-1感染24h。采用细胞计数试剂盒-8(CCK-8)法评估不同剂量(12.5、25、50、100μmol·L^(-1))黄芩素处理或不同滴度(0.1、1、10 MOI)HSV-1感染24h后的细胞毒性反应,并检测12.5、25、50、100μmol·L^(-1)黄芩素处理24h后对HSV-1诱导的HUVECs活力的影响。采用Transwell实验检测各组HUVECs的迁移;逆转录定量PCR(RT-q PCR)用于检测各组HUVECs中血管内皮生长因子A(VEGFA)、血小板-内皮细胞黏附分子1(PECAM1/CD31)、白细胞介素-17A(IL^(-1)7A)的m RNA表达水平。采用分子对接分析验证黄芩素与IL^(-1)7A蛋白之间的结合活性。本实验结果显示,与Mock组相比,黄芩素处理组的HUVECs活力未见显著变化;而HSV-1感染组的HUVECs活力和迁移显著增强,VEGFA、CD31和IL^(-1)7的m RNA表达显著上调。与HSV-1组相比,黄芩素低剂量和高剂量干预处理均抑制了HSV-1诱导的HUVECs活力和迁移,并降低了VEGFA、CD31和IL^(-1)7的m RNA表达。此外,分子对接分析表明,黄芩素能够与IL^(-1)7A蛋白稳定结合,结合亲和力=-7.0 kcal·mol^(-1)。总的来说,我们的研究表明,黄芩素通过靶向抑制IL^(-1)7A通路抑制HSV-1诱导的HUVECs血管形成。 展开更多
关键词 HSV-1 黄芩素 角膜新生血管生成 单纯疱疹性角膜炎 VEGFA
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改进蜣螂优化算法的无人机路径规划 被引量:1
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作者 吕亚娜 袁慧玲 +1 位作者 于舒娟 刘东 《兵器装备工程学报》 北大核心 2025年第8期1-10,共10页
针对传统蜣螂优化算法在路径规划中易陷入局部最优的局限性,提出了一种改进蜣螂优化算法的路径规划方法。通过引入佳点集初始化、改进的正弦算法、结合莱维飞行和布朗运动的变异策略、单纯形法和自适应反向学习策略,帮助算法跳出局部最... 针对传统蜣螂优化算法在路径规划中易陷入局部最优的局限性,提出了一种改进蜣螂优化算法的路径规划方法。通过引入佳点集初始化、改进的正弦算法、结合莱维飞行和布朗运动的变异策略、单纯形法和自适应反向学习策略,帮助算法跳出局部最优以及增强算法的寻优能力。同时考虑了无人机的运行约束,进一步提升其在实际应用中的可行性。算法测试和仿真数据验证了改进算法的性能优于其他算法。研究结果表明,在复杂环境中改进算法规划出的飞行路径是可行且高效的。 展开更多
关键词 无人机 路径规划 蜣螂优化算法 莱维飞行 布朗运动 单纯形法 反向学习
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基于多种策略改进的小龙虾优化算法
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作者 徐勇 赵文贺 《信息技术与信息化》 2025年第10期36-40,共5页
针对传统小龙虾优化算法易早熟收敛、全局搜索能力弱及寻优精度不足等问题,文章创新性地提出了一种融合多种优化策略,对小龙虾优化算法加以改进的方法。首先,采用Logistic-tent混沌映射机制来完成种群初始位置的设定,有效提升种群初始... 针对传统小龙虾优化算法易早熟收敛、全局搜索能力弱及寻优精度不足等问题,文章创新性地提出了一种融合多种优化策略,对小龙虾优化算法加以改进的方法。首先,采用Logistic-tent混沌映射机制来完成种群初始位置的设定,有效提升种群初始位置分布的随机性;其次,使用及时信息同步反向学习机制来更新个体位置,加速搜索效率并提高解的质量;最后,对最优位置进行Nelder-Mead单纯形法扰动,增强了算法局部开发的能力。基于CEC2020部分测试集进行验证,并与其他群体智能优化算法进行对比,实验结果表明改进的小龙虾优化算法(ICOA)的性能有显著提高。 展开更多
关键词 小龙虾优化算法 Logistic-tent混沌映射 反向学习 nelder-mead单纯形法
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基于Nelder-Mead单纯形法的改进量子行为粒子群算法 被引量:10
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作者 郑伟博 张纪会 《复杂系统与复杂性科学》 EI CSCD 北大核心 2016年第2期97-104,共8页
针对PSO算法搜索精度较低,并且在复杂多模态函数优化中,容易陷入局部极值的问题,提出了一种改进的量子行为粒子群优化算法。研究了该算法的基本原理、给出了算法流程并采用正交试验的方式获得了一套通用性较强的算法参数。并以CEC’13... 针对PSO算法搜索精度较低,并且在复杂多模态函数优化中,容易陷入局部极值的问题,提出了一种改进的量子行为粒子群优化算法。研究了该算法的基本原理、给出了算法流程并采用正交试验的方式获得了一套通用性较强的算法参数。并以CEC’13的28个测试函数作为测试集,采用Wilcoxon符号秩检验将NM-QPSO算法分别与PSO算法和QPSO算法的误差进行比较试验。试验表明:NM-QPSO算法在统计意义上优于传统的PSO算法和QPSO算法,并且在高维函数优化中,具有显著优势。 展开更多
关键词 群体智能 粒子群优化算法 量子行为粒子群优化算法 Nelder Mead单纯形法
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