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Joint offloading strategy based on quantum particle swarm optimization for MEC-enabled vehicular networks

Digital Communications and Networks 2023年第1期9卷 56-66页

作者： Wanneng shu yan Li College of Computer Science South-Central University for NationalitiesWuhan430074China College of Science Huazhong Agricultural UniversityWuhan430070China

With the development of the mobile communication technology,a wide variety of envisioned intelligent transportation systems have emerged and put forward more stringent requirements for vehicular *** of computation-intensive and power-hungry applications result in a large amount of energy consumption and computation costs,which bring great challenges to the on-board *** is necessary to exploit traffic offloading and scheduling in vehicular networks to ensure the Quality of Experience(QoE).In this paper,a joint offloading strategy based on quantum particle swarm optimization for the Mobile Edge Computing(MEC)enabled vehicular networks is *** minimize the delay cost and energy consumption,a task execution optimization model is formulated to assign the task to the available service nodes,which includes the service vehicles and the nearby Road Side Units(RSUs).For the task offloading process via Vehicle to Vehicle(V2V)communication,a vehicle selection algorithm is introduced to obtain an optimal offloading decision ***,an improved quantum particle swarm optimization algorithm for joint offloading is proposed to optimize the task delay and energy *** maintain the diversity of the population,the crossover operator is introduced to exchange information among ***,the crossover probability is defined to improve the search ability and convergence speed of the ***,an adaptive shrinkage expansion factor is designed to improve the local search accuracy in the later *** results show that the proposed joint offloading strategy can effectively reduce the system overhead and the task completion delay under different system parameters.

关键词： Computation offloading MEC-enabled vehicular networks Mobile edge computing Task scheduling

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Application of the Bayes’ theory to the failure rate evaluation of electrical apparatus

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第3期8卷 501-505页

作者： JIN Shao-hua LU Jian-guo WAN yan-ping SUN shu-guang Department of Mathematics Hebei University of Technology Tianjin 300130 China

The Weibull distribution has been widely used in reliability fields. A mixed Weibull distribution represents a popu- lation that consists of several Weibull subpopulations. In this paper, a new approach which combines the least-squares method with Bayes’ theorem, takes advantage of the parameter estimation for single Weibull distribution is developed to estimate the pa- rameters of each subpopulation. The estimates given by this paper also satisfy the maximum likelihood equation. The estimates of the failure rate of the mixed Weibull population are given. An actual test data is computed by using the proposed method. The Kolmogorov-Smirnov goodness-of-fit test turns out that the proposed method yields more accurate result.

关键词： Bayesian estimation Failure rate Least-squares method Maximum likelihood principle Mixed-Weibull distribution

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An improved procedure for the synthesis of 4-methylimidazol-2-one

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Chinese Chemical Letters 2007年第7期18卷 777-778页

作者： Hong shu yan Qing Wang Pu Qin Cai Chun guo School of Pharmaceutical Engineering Shenyang Pharmaceutical University Shenyang 110016 China

A novel one-pot synthetic method of 4-methylimidazol-2-one is described. The target compound is conveniently synthesized from sodium diformylamide, a modified Gabriel reagent prepared, through condensation, hydrolyzat... 详细信息

关键词： 4-Methylimidazol-2-one Synthesis Sodium diformylamide

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Both host and diet shape bacterial communities of predatory mites

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Insect Science 2024年第2期31卷 551-561页

作者： Hong yan Endong Wang guo-shu Wei Bo Zhang Xuenong Xu Institute of Plant Protection Chinese Academy of Agricultural SciencesBejingChina College of Plant Protection Hebei Agricultural UniversityBaodingHebei ProvinceChina Key Laboratory of Natural Enemies Insects Ministry of Agriculture and Rural AffairsBeijingChina

Microbial communities,derived from food,ambient,and inner,can affect host ecological adaption and *** with most phytophagous arthropods,predators may have more opportunities to develop specific microbiota depending on the level of prey *** explore how diet sources affect host microbial communities and vary across predator species,we considered 3 types of predators from Phytoseiidae(Acari:Mesostigmata):polyphagous(Amblyseius orientalis Ehara,Neoseiulus barkeri Hughes,and Amblyseius swirski Athias-Henrio),oligophagous(Neoseiulus californicus McGregor),and monophagous(Phytoseiulus persimilis Athias-Henriot)predatory *** polyphagous species were fed on 2 types of diets,natural prey and alternative *** using 16S rRNA sequencing,we found that diet was the main source of microbiota in predatory mites,while there was no clear pattern affected by prey *** 3 polyphagous predators,host species had a larger impact than prey on microbial *** *** or *** which showed consistency in their microbiota,prey switching significantly affectedβ-diversity of bacterial composition in ***,with 56%of the microbial *** short,our results confirmed the substantial influence of diet on host microbial construction in predatory species,and highlighted species differences in shaping the microbiota which are not necessarily related to prey specialization.

关键词： diet switching feeding habits host-microbial interactions invertebrate microbiota 16S rRNA

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Incorporating target language semantic roles into a string-to-tree translation model

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Frontiers of Information Technology & Electronic Engineering 2017年第10期18卷 1534-1542页

作者： Chao SU Yu-hang guo He-yan HUANG shu-min SHI Chong FENG School of Computer Science and Technology Beijing Institute of TechnologyBeijing 100081China Beijing Engineering Research Center of High Volume Language Information Processing and Cloud Computing Applications Beijing 100081China Beijing Advanced Innovation Center for Imaging Technology Capital Normal UniversityBeijing 100048China

The string-to-tree model is one of the most successful syntax-based statistical machine translation(SMT) models. It models the grammaticality of the output via target-side syntax. However, it does not use any semantic information and tends to produce translations containing semantic role confusions and error chunk sequences. In this paper, we propose two methods to use semantic roles to improve the performance of the string-to-tree translation model:(1) adding role labels in the syntax tree;(2) constructing a semantic role tree, and then incorporating the syntax information into it. We then perform string-to-tree machine translation using the newly generated trees. Our methods enable the system to train and choose better translation rules using semantic information. Our experiments showed significant improvements over the state-of-the-art string-to-tree translation system on both spoken and news corpora, and the two proposed methods surpass the phrase-based system on large-scale training data.

关键词： Machine translation Semantic role Syntax tree String-to-tree

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The deconvolution of lunar brightness temperature based on the maximum entropy method using Chang'e-2 microwave data

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Research in Astronomy and Astrophysics 2015年第2期15卷 293-304页

作者： shu-guo Xing yan Su Jian-Qing Feng Chun-Lai Li National Astronomical Observatories Chinese Academy of Sciences

A passive and multi-channel microwave sounder onboard the Chang＇e-2 orbiter has successfully acquired microwave observations of the lunar surface and subsurface structure. Compared with the Chang＇e-1 orbiter, the Chang＇e-2 orbiter obtained more accurate and comprehensive microwave brightness temperature data, which are helpful for further research. Since there is a close relationship between mi- crowave brightness temperature data and some related properties of the lunar regolith, such as the thickness, temperature and dielectric constant, precise and high resolution brightness temperature data are necessary for such research. However, through the detection mechanism of the microwave sounder, the brightness temperature data ac- quired from the microwave sounder are weighted by the antenna radiation pattern, so the data are the convolution of the antenna radiation pattern with the lunar brightness temperature. In order to obtain the real lunar brightness temperature, a deconvolution method is needed. The aim of this paper is to solve the problem associated with per- forming deconvolution of the lunar brightness temperature. In this study, we introduce the maximum entropy method （MEM） to process the brightness temperature data and achieve excellent results. The paper mainly includes the following aspects： first, we introduce the principle of the MEM; second, through a series of simulations, the MEM has been verified as an efficient deconvolution method; and third, the MEM is used to process the Chang＇e-2 microwave data and the results are significant.

关键词： space vehicles instruments: microwave sounder Moon: brightness temperature methods: maximum entropy method

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Syntheses and Vasodilatory Activities of New Pyrazolo[4,3-d]pyrimidin-7-ones

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Chemical Research in Chinese Universities 2006年第4期22卷 468-473页

作者： ZHAO yan-fang ZHAI Xin CHEN Jiao-yue guo shu-chun GONG Ping School of Pharmaceutical Engineering Shenyang Pharmaceutical University Shenyang 110016 P.R. China

A series of novel pyrazolo [ 4,3-d ] pyrimidin-7-ones was designed and synthesized in order to find new potent phosphodiesterase 5 inhibitors（PDE5）. The structures of all the compounds were confirmed by IR, ^1H NMR and MS; their in vitro vasodilatory activities were tested on isolated rabbit aortic spiral strips. Among them, compound X3 displays a significant vasodilatory activity, which is more potent than verapamil.

关键词： Pyrazolo[4,3-d]pyrimidin-7-one Synthesis Vasodilatory activity

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LF泡沫精炼渣研究和发展现状

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山东冶金 2004年第3期26卷 44-46页

作者：张东力毕衍涛陈树国济南钢铁集团总公司山东济南250101

介绍了LF泡沫精炼渣的提高热效率 ,降低炉衬消耗等功能 ,重点分析了炉渣物理性质、炉渣成分、工艺条件等对熔渣泡沫化性能的影响。指出精炼渣的脱硫性能和泡沫化性能存在一定冲突。

关键词： LF 泡沫精炼渣熔渣泡沫化性能发泡机理发泡指数

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Enhanced subacute ischemic stroke treatment via multistage drug delivery system design for combination therapy

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Science China Chemistry 2025年

作者： Xihan Xu Juan-Juan Li Jiamin Li Hui-yan Zhang Yilin Qi Bing-Sen Shi Tianqi Li Shan-Shan Su Weitao Zhao Chang Chen Zhongying Gong Huiyu Liu Ke-Rang Wang Dong-Sheng guo Xue Xue State Key Laboratory of Medicinal Chemical Biology College of Pharmacy Nankai University College of Chemistry State Key Laboratory of Elemento-Organic Chemistry Key Laboratory of Functional Polymer Materials (Ministry of Education) Frontiers Science Center for New Organic Matter Collaborative Innovation Center of Chemical Science and EngineeringNankai University College of Chemistry and Materials Science State Key Laboratory of New Pharmaceutical Preparations and Excipients Key Laboratory of Medicinal Chemistry and Molecular Diagnosis (Ministry of Education) Key Laboratory of Chemical Biology of Hebei Province Hebei Research Center of the Basic Discipline of Synthetic Chemistry Hebei University Department of Neurology Tianjin First Central Hospital School of Medicine Nankai University Beijing Advanced Innovation Center for Soft Matter Science and Engineering State Key Laboratory of Organic-Inorganic Composites Beijing Laboratory of Biomedical Materials Bionanomaterials & Translational Engineering Laboratory Beijing Key Laboratory of BioprocessBeijing University of Chemical Technology

The management of acute ischemic stroke remains challenging due to its abrupt onset and the narrow treatment window,resulting in high rates of disability and *** therapy for neuroprotection and neurorepair strategies provided new hopes for subacute stroke *** we designed a multistage nanodelivery system that matches the unique microenvironment of the subacute phase of stroke,which utilizes calixarene as a building block to effectively load the neuroprotective drug *** calixarene is designed with glycosidic linkages targeting the glucose transporter 1 (GLUT1)on the blood-brain barrier (BBB) and azo bonds that are responsive to hypoxic ***,the decomposed calixarene molecules themselves possess intrinsic bio-activation to modulate inflammatory responses,achieving a multistage therapeutic approach that transitions from targeting to release and finally to *** approach combines anti-inflammation and neuroprotection,providing a multi-level treatment *** system was validated in a rat model of permanent middle cerebral artery occlusion (pMCAO),demonstrating that intravenous administration of the nanodelivery system repairs brain damage and improves motor function 24 h post-pMCAO *** work offers a precise and integrative strategy for stroke patients missing the acute therapy window to improve functional recovery and enhance the effect of comprehensive treatment.

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A novel process for production of hepatitis A virus in Vero cells grown on microcarriers in bioreactor

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World Journal of Gastroenterology 2004年第17期10卷 2571-2573页

作者： Ming-BoSun yan-JunJiang Wei-DongLi Ping-ZhongLi guo-LiangLi shu-DeJiang guo-yangLiao InstituteofMedicalBiology ChineseAcademyofMedicalSciencesPekingUnionMedicalCollegeKunming650118YunnanProvinceChina

AIM: To develop a novel process for production of HAV in Vero cells grown on microcarriers in a ***: Vero cells infected with HAV strain W were seeded at an initial density of 1×10^5 cells/mL into a 7-L bioreactor containing Cytodex-I microcarriers. During the stage of cell proliferation, the following conditions were applied: pH 7.2±0.2, temperature 37±0.2℃, dissolved oxygen 40% of air saturation and agitation rate 40 r/*** the stage of virus culture started, the culture conditions were altered to pH 7.2±0.2, temperature 35±0.2℃,dissolved oxygen 25% of air saturation, agitation rate 50 r/min and perfusion of fresh medium at a flux of 20 mL/h. During the course of fermentation, cell density, HAV antigen titre,glucose, lactate and ammonia levels were monitored. A control experiment using conventional static culture was conducted in the T150 ***: After a 28-d cultivation, cell density increased to 14.0×10^5 cells/mL in the bioreactor, 5.6×10^9 viable cells and 4 000 mL virus suspension with a titre of 1:64 were *** viral antigen output per cell unit in the bioreactor was 3-fold higher than that in the T150 flask. Meanwhile the metabolic mode of Vero cells did not change after the infection with HAY strain ***: The process for production of HAV in Vero cells grown on microcarriers in a bioreactor is a novel,efficient and practical way to obtain virus antigen for vaccine purpose. This approach produces more cells and HAV antigen than the conventional static culture. With futher improvement, it is possible to be used for the production of hepatitis A vaccine.

关键词：肝炎活动性 Vero细胞细胞生长微量生物反应 HAV 发酵作用

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