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Multi-objective fuzzy particle swarm optimization based on elite archiving and its convergence

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Journal of Systems Engineering and Electronics 2008年第5期19卷 1035-1040页

作者： Wei Jingxuan wang yuping School of Computer Science and Technology Xidian Univ. Xi'an 710071 P. R. China Dept. of Mathematics School of Science Xidian Univ. Xi'an 710071 P. R. China

A fuzzy particle swarm optimization （PSO） on the basis of elite archiving is proposed for solving multi-objective optimization problems. First, a new perturbation operator is designed, and the concepts of fuzzy global best and fuzzy personal best are given on basis of the new operator. After that, particle updating equations are revised on the basis of the two new concepts to discourage the premature convergence and enlarge the potential search space; second, the elite archiving technique is used during the process of evolution, namely, the elite particles are introduced into the swarm, whereas the inferior particles are deleted. Therefore, the quality of the swarm is ensured. Finally, the convergence of this swarm is proved. The experimental results show that the nondominated solutions found by the proposed algorithm are uniformly distributed and widely spread along the Pareto front.

关键词： multi-objective optimization particle swarm optimization fuzzy personal best fuzzy global best elite archiving.

Simulated annealing spectral clustering algorithm for image segmentation

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Journal of Systems Engineering and Electronics 2014年第3期25卷 514-522页

作者： Yifang Yang yuping wang School of Mathematics and Statistics Xidian University College of Science Xi'an Shiyou University School of Computer Science and Technology Xidian University

The similarity measure is crucial to the performance of spectral clustering. The Gaussian kernel function based on the Euclidean distance is usual y adopted as the similarity measure. However, the Euclidean distance measure cannot ful y reveal the complex distribution data, and the result of spectral clustering is very sensitive to the scaling parameter. To solve these problems, a new manifold distance measure and a novel simulated anneal-ing spectral clustering （SASC） algorithm based on the manifold distance measure are proposed. The simulated annealing based on genetic algorithm （SAGA）, characterized by its rapid convergence to the global optimum, is used to cluster the sample points in the spectral mapping space. The proposed algorithm can not only reflect local and global consistency better, but also reduce the sensitivity of spectral clustering to the kernel parameter, which improves the algorithm’s clustering performance. To efficiently apply the algorithm to image segmentation, the Nystrom method is used to reduce the computation complexity. Experimental results show that compared with traditional clustering algorithms and those popular spectral clustering algorithms, the proposed algorithm can achieve better clustering performances on several synthetic datasets, texture images and real images.

关键词： spectral clustering (SC) simulated annealing (SA) image segmentation Nystr6m method.

Optimizing random write performance of FAST FTL for NAND flash memory

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Science China(Information Sciences) 2015年第3期58卷 52-65页

作者： GUO XuFeng wang yuping Department of Computer Science and Technology Tsinghua University

The NAND flash memory has gained its popularity as a storage device for consumer electronics due to its higher performance and lower power *** most of these devices,an FTL(Flash Translation Layer)is adopted to emulate a block device interface to support the conventional disk-based file systems that make the flash management much *** various FTLs,the FAST(Fully-Associative Sector Translation)FTL has shown superior performance,becoming one of the state-of-the-art ***,the FAST FTL performs poorly while dealing with a huge number of small-sized random writes brought by upper applications such as database transaction processing *** two important reasons are the absence of efficient selection schemes for the reclaiming of random log blocks that leads to large overhead of full merges,and the sequential log block scheme which no longer applies to random writes due to the large costs of partial *** overcome the above two defects in the presence of random writes,two techniques have been *** first technique reduced full merge costs by adopting a novel random log block selection algorithm,based on the block associativity and the relevant-valid-page-amount of random log blocks as the key block selection *** second technique replaced the sequential log block with a random log block to eliminate the overhead of partial *** results showed that our optimizations can outperform FAST FTL significantly in three aspects:erase counts,page migration amount,and response *** maximum improvement level in these cases could reach up to 66.8%,98.2%,and 51.0%,respectively.

关键词： flash flash translation layer random write performance optimization FAST FTL

Multiobjective evolutionary algorithm for dynamic nonlinear constrained optimization problems

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Journal of Systems Engineering and Electronics 2009年第1期20卷 204-210页

作者： Liu Chun'an wang yuping Dept. of Mathematics Baoji Univ. of Arts and Science Baoji 721013 P. R. China School of Computer Engineering and Technology Xidian Univ. Xi'an 710071 P. R. China

A new method to solve dynamic nonlinear constrained optimization problems （DNCOP） is proposed. First, the time （environment） variable period of DNCOP is divided into several equal subperiods. In each subperiod, the DNCOP is approximated by a static nonlinear constrained optimization problem （SNCOP）. Second, for each SNCOP, inspired by the idea of multiobjective optimization, it is transformed into a static bi-objective optimization problem. As a result, the original DNCOP is approximately transformed into several static bi-objective optimization problems. Third, a new multiobjective evolutionary algorithm is proposed based on a new selection operator and an improved nonuniformity mutation operator. The simulation results indicate that the proposed algorithm is effective for DNCOP.

关键词： dynamic optimization nonlinear constrained optimization evolutionary algorithm optimal solutions

Decoding and quantitative detection of antibiotics by a luminescent mixed-lanthanide-organic framework

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Frontiers of Environmental Science & Engineering 2022年第12期16卷 55-65页

作者： yuping wang Jing Xia Yanxin Gao Department of Environmental Science and Engineering Fuzhou UniversityMinhou350108China State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process School of Resources and Environmental EngineeringEast China University of Science and TechnologyShanghai200237China

Due to the potential risk of antibiotics to the environment,the development of inexpensive,simple,and reliable antibiotic detection methods is significant but also faces *** this work,several lanthanide-organic frameworks(LOFs),constructed from lanthanide ions(Eu3+and/or Tb3+)and 1,3,5-benzene-tricarboxylic acid(BTC),were synthesized by solvothermal ***-S3 with comparable emission peaks of 5D4→7F5(Tb3+,545 nm)and 5D0→7F2(Eu3+,618 nm)was selected as a luminescent *** this system,the highly efficient energy transferred from the organic linker to lanthanide ions and from Tb3+to Eu3+***-S3 sensor was capable of decoding antibiotics by distinguishable emission intensity ***,a two-dimensional decoded map of antibiotics was *** linear relationship between antibiotic concentration and emission intensity ratio indicated the quantitative determination of antibiotics was *** a typical analyte,the response mechanism of nalidixic acid(NA)was investigated in *** competition of NA and BTC for UV light absorption,as well as the binding propensity of NA and Tb,affected the organic linkers-to-lanthanide ions and Tb-to-Eu energy transfer,resulting in the change of fluorescence intensity *** self-calibrating mixed-LOF sensor overcame the uncontrollable errors of the traditional absolute emission intensity method and generated stable luminescent signals in multiple ***,the integration of LOF-S3 with polymer fibers enabled the formation of a LOF-polymer fibrous composite with fluorescence detection capability,which is a promising portable sensor for practical applications.

关键词： Antibiotics Sensor Luminescence Lanthanide-organic frameworks

Synthesis, characterization, theoretical investigation, and properties of monoclinic-phase InWO4 hollow nanospheres

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Nano Research 2018年第9期11卷 4664-4672页

作者： yuping wang Di wang Ying Xie Guofeng wang Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education School of Chemistry and Materials ScienceHeilongjiang University Harbin 150080 China

As a newly discovered member of the ttmgstate famil3~ InWO4 hollow nanospheres with a monoclinic wolframite structure were synthesized successfully. The crystal phase of InWO4 was investigated via a combination of CASTEP geometric optimization and experimental simulation. InWO, has a space group of P2/c with two InWO, formula units per unit cell. The optimized cell dimensions are a = 5.16 A, b = 5.97 A, and c = 5.23 A, with a = 90°, β= 92.11°, 7 = 90°, giving a unit cell volume of 161.10 A^3, which is consistent with the experimental measurements. More importantly, InWO4 was a promising host material for different Ln^3＋（Ln = Eu and Yb/Er） ions. For InWO4：Yb^3＋/Er^3＋ excited at 980 nm, transitions from the ^4G11/2 （384 nm）, ^2H9/2 （411 nm）, and ^4F7/2 （487 nm） levels to the ground state （^4I15/2） of Er^3＋ were observed. In addition to the aforementioned properties, the InWO4 hollow nanospheres can be used to improve the performance of dye-sensitized solar cells, which is chiefly attributed to their light scattering.

关键词： InWO4 rare earth hollow nanospheres luminescence

大麻二酚对转化生长因子β1诱导肝星状细胞活化和肝纤维化的作用

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中国组织工程研究 2025年第23期29卷 4965-4974页

作者：王联谢娜赵珮伶陈浩李芏酉王豫萍贵州医科大学附属医院临床检验中心贵州省贵阳市550003 贵州医科大学医学检验学院临床微生物学及免疫学教研室贵州省贵阳市550004

背景:大麻二酚具有抗炎、抗氧化等药理学作用,并且不具有精神活性,在肝脏疾病中的研究日渐增加,但其对肝星状细胞转化生长因子β1/Smad信号转导通路的作用尚未明确。目的:探讨大麻二酚对肝星状细胞中转化生长因子β1/Smad信号转导通路... 详细信息

背景:大麻二酚具有抗炎、抗氧化等药理学作用,并且不具有精神活性,在肝脏疾病中的研究日渐增加,但其对肝星状细胞转化生长因子β1/Smad信号转导通路的作用尚未明确。目的:探讨大麻二酚对肝星状细胞中转化生长因子β1/Smad信号转导通路的影响,研究其抗肝纤维化的可能机制。方法:(1)体外实验:选取大鼠肝星状细胞株(HSC-T6),分6组培养:对照组常规培养24 h,单纯药物组加入大麻二酚培养24 h,造模组加入转化生长因子β1培养24 h,造模+低剂量药物组、造模+高剂量药物组、造模+阳性对照组均加入转化生长因子β1培养24 h后分别加入1,5μmol/L大麻二酚或水飞蓟素培养24 h。培养结束后,检测各组细胞α-平滑肌肌动蛋白与Ⅰ型胶原mRNA表达、白细胞介素1β与肿瘤坏死因子α水平及Ⅰ型胶原、转化生长因子β1/Smad信号转导通路蛋白表达。(2)动物体内实验:将C57BL/6J小鼠随机分为5组,每组8只:假手术组不造模,造模组、造模+低剂量药物组、造模+高剂量药物组、造模+阳性对照组通过胆管结扎法建立肝纤维化模型,造模3周后分别腹腔注射4,8 mg/kg大麻二酚或水飞蓟素,1次/d,连续给药7 d。给药结束后,检测各组小鼠肝功能、肝脏病理形态及α-平滑肌肌动蛋白、Ⅰ型胶原、转化生长因子β1/Smad信号转导通路相关蛋白表达。结果与结论:(1)体外实验:与对照组比较,造模组HSC-T6细胞α-平滑肌肌动蛋白与Ⅰ型胶原mRNA表达、白细胞介素1β与肿瘤坏死因子α水平以及Ⅰ型胶原、转化生长因子β1、p-Smad2/3蛋白表达均升高(P<0.05),Smad7蛋白表达降低(P<0.05);两种剂量大麻二酚处理可改善转化生长因子β1诱导的HSC-T6细胞上述指标的变化,并且以造模+高剂量药物组改善作用更明显;(2)体内实验:与假手术组比较,模型组小鼠血清丙氨酸氨基转移酶、天门冬氨酸氨基转移酶活性升高(P<0.05),肝组织中炎性细胞浸润及胶原含量增加(P<0.05),转化生长因子β1/Smad信号转导通路被激活,α-平滑肌肌动蛋白、Ⅰ型胶原蛋白表达升高(P<0.05);两种剂量大麻二酚干预可减轻造模小鼠上述指标的变化,并且以造模+高剂量药物组效果更明显;(3)结果表明,大麻二酚通过抑制肝星状细胞转化生长因子β1/Smad信号传导通路的激活抑制肝纤维化。

关键词：大麻二酚肝星状细胞肝纤维化信号转导通路转化生长因子β1/Smad HSC-T6细胞

Multi-population and diffusion UMDA for dynamic multimodal problems

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Journal of Systems Engineering and Electronics 2010年第5期21卷 777-783页

作者： Yan Wu yuping wang Xiaoxiong Liu Jimin Ye School of Sciences Xidian University Xi'an 710071 R R. China School of Computer Science and Technology Xidian University Xi'an 710071 P. R. China College of Automation Northwestern Polytechnical University Xi'an 710072 P. R. China

In dynamic environments,it is important to track changing optimal solutions over *** marginal distribution algorithm（UMDA） which is a class algorithm of estimation of distribution algorithms attracts more and more attention in recent *** this paper a new multi-population and diffusion UMDA（MDUMDA） is proposed for dynamic multimodal *** multi-population approach is used to locate multiple local optima which are useful to find the global optimal solution quickly to dynamic multimodal *** diffusion model is used to increase the diversity in a guided fashion,which makes the neighbor individuals of previous optimal solutions move gradually from the previous optimal solutions and enlarge the search *** approach uses both the information of current population and the part history information of the optimal *** experimental studies on the moving peaks benchmark are carried out to evaluate the proposed algorithm and compare the performance of MDUMDA and multi-population quantum swarm optimization（MQSO） from the *** experimental results show that the MDUMDA is effective for the function with moving optimum and can adapt to the dynamic environments rapidly.

关键词： univariate marginal distribution algorithm(UMDA) dynamic multimodal problems dynamic optimization multipopulation scheme.

Alternative New China Cinema： Hong Kong Leftist Cinema during the Cold War-- A Discussion of the Hong Kong Leftist Film The True Story of Ah Q

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Frontiers of Literary Studies in China-Selected Publications from Chinese Universities 2015年第1期9卷 131-145页

作者： yuping wang School of Humanities Shanghai Jiao Tong University Shanghai 200240 China

The paper discusses the 1957 Hong Kong film The True Story of Ah Q. As a Hong Kong leftist film, its plot and production process are relevant to understanding the political and cultural life of New China. However, Hong Kong leftist cinema played an important role in the reception of New China cinema overseas; it can only be understood within the context of political and cultural life in New China. This paper explores the complicated relations between Hong Kong leftist cinema, domestic socialist cinema, and Shanghai left-wing cinema in the 1930s. In addition, it discusses The True Story ofAh Q as a film with features that identify it with both Hong Kong leftist cinema and New China cinema. Thus, the film＇s acceptibility is determined by the tensions between these two identifications.

关键词： Hong Kong leftist cinema Shanghai left-wing cinema Socialistcinema the cinema of new-democratic revolution The True Story ofAh Q