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Virtualized Platform for Multicast Services in Software Defined Networks

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Chinese Journal of Electronics 2017年第3期26卷 453-459页

作者： liao Shengquan WU Chunming hong Xiaoyan ZHU Kai CHEN Shuangxi College of Computer Science and Technology Zhejiang University Department of Computer Science The University of Alabama Division of Information Technology Jiaxing Vocational Technical College

With the growing trend of deploying Software defined networks(SDN) in Internet and data centers,it is necessary to investigate the operation of multicast services in this paradigm shift. We propose an Open Flowbased virtualized platform to support multiple multicast services simultaneously, each with their own customized multicast algorithms and performance-enhancing strategies for its service requirements. The contributions include:1) systematic discussions of the technical challenges regarding to implementing multicast services in SDN, with the proposed architectural components addressing these issues; 2) a virtualized platform enabling user-defined multicast services, independent of current Internet-based protocols; 3) experiments validating the necessity and efficiency of the platform in supporting its design goals and functionalities, with two additional real multicast applications further confirming the feasibility and operability of the proposed prototype.

关键词： Customized multicast service Open Flow Software defined networks(SDN)

A Posteriori Error Estimate and Adaptive Mesh Refinement Algorithm for Atomistic/Continuum Coupling with Finite Range Interactions in Two Dimensions

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Communications in Computational Physics 2020年第1期27卷 198-226页

作者： Mingjie liao Ping lin Lei Zhang School of Mathematics and Physics University of Science and Technology BeijingBeijing 100083P.R.China Department of Mathematics University of DundeeDundeeDD14HNScotlandUnited Kingdom School of Mathematical Sciences Institute of Natural Sciences and MOE-LSCShanghai Jiao Tong UniversityShanghai 200240P.R.China

In this paper,we develop the residual based a posteriori error estimates and the corresponding adaptive mesh refinement algorithm for atomistic/continuum(a/c)coupling with finite range interactions in two *** have systematically derived a new explicitly computable stress tensor formula for finite range *** particular,we use the geometric reconstruction based consistent atomistic/continuum(GRAC)coupling scheme,which is quasi-optimal if the continuum model is discretized by P1 finite *** numerical results of the adaptive mesh refinement algorithm is consistent with the quasi-optimal a priori error estimates.

关键词： Atomistic models coarse graining atomistic-to-continuum coupling quasicontin-uum method a posteriori error estimate

Impacts of meteorological parameters and emissions on decadal,interannual, and seasonal variations of atmospheric black carbon in the Tibetan Plateau

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Advances in Climate Change Research 2016年第3期7卷 123-131页

作者： MAO Yu-Hao liao hong State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC) Institute of Atmospheric Physics Chinese Academy of Sciences School of Environmental Science and Engineering Nanjing University of Information Science and Technology

We quanti?ed the impacts of variations in meteorological parameters and emissions on decadal, interannual, and seasonal variations of atmospheric black carbon(BC) in the Tibetan Plateau for 1980-2010 using a global 3-dimensional chemical transport model driven by the Modern Era Retrospective-analysis for Research and Applications(MERRA) meteorological ?elds. From 1980 to 2010, simulated surface BC concentrations and all-sky direct radiative forcing at the top of the atmosphere due to atmospheric BC increased by 0.15 μg m^(-3)(63%) and by 0.23 W m^(-2)(62%), respectively, averaged over the Tibetan Plateau(75-105°E, 25-40°N). Simulated annual mean surface BC concentrations were in the range of 0.24-0.40 μg m^(-3) averaged over the plateau for 1980-2010, with the decadal trends of 0.13 μg m^(-3)per decade in the 1980 s and 0.08 in the 2000 s. The interannual variations were -5.4% to 7.0% for deviation from the mean, 0.0062 μg m^(-3) for mean absolute deviation, and 2.5% for absolute percent departure from the mean. Model sensitivity simulations indicated that the decadal trends of surface BC concentrations were mainly driven by changes in emissions, while the interannual variations were dependent on variations of both meteorological parameters and emissions. Meteorological parameters played a crucial role in driving the interannual variations of BC especially in the monsoon season.

关键词： Black carbon Tibetan Plateau Interannual variations South Asian summer monsoon

Response of fine particulate matter to reductions in anthropogenic emissions in Beijing during the 2014 Asia–Pacific Economic Cooperation summit

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Atmospheric and Oceanic Science Letters 2016年第6期9卷 411-419页

作者： GU Yi-Xuan liao hong State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of Sciences College of Earth Science University of Chinese Academy of Sciences School of Environmental Science and Engineering Nanjing University of Information Science &Technology

The nested-grid capability of the global chemical transport model GEOS-Chem, with a horizontal resolution of 1/4°× 5/16° （latitude x longitude）, was used to identify the chemical species whose reductions made the largest contributions to decreases in PM2.s concentrations （fine particulate matter, diameter 〈 2.5μm, defined in this study as the sum of sulfate, nitrate, ammonium, black carbon, and organic carbon aerosols） in Beijing during the 2014 Asia-Pacific Economic Cooperation （APEC） summit. A number of numerical experiments were carried out for the period 15 October-29 November 2014. The model reproduced the observed daily variations of concentrations of PM2.s and gas-phase species （carbon monoxide, nitrogen dioxide, and sulfur dioxide）. Simulated PM2.s concentrations decreased by 55.9%-58.5% during the APEC period, compared to other periods in October and November 2014, which agreed closely with measurements. Sensitivity results showed that emissions control measures regarding nitrogen oxides and organic carbon over North China led to the largest reductions in PM2.s concentrations in Beijing during the APEC summit, which led to overall reductions in the PM2.5 concentration of Beijing by 5.7% and 4.6%, respectively. The control of ammonia emissions was found to be able to greatly reduce PM2.5 concentrations in the whole of North China during the APEC meeting.

关键词： Fine particulate matter emissions reduction Asia-Pacifc EconomicCooperation Beijing GEOS-Chem

Neuroligins Differentially Mediate Subtype-Specific Synapse Formation in Pyramidal Neurons and Interneurons

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Neuroscience Bulletin 2019年第3期35卷 497-506页

作者： Qiang-Qiang Xia Jing Xu Tai-lin liao Jie Yu Lei Shi Jun Xia Jian-hong Luo Junyu Xu Department of Neurobiology Institute of NeuroscienceNHC and CAMS Key Laboratory of Medical NeurobiologyZhejiang University School of MedicineHangzhou 31005& China JNU-HKUST Joint Laboratory for Neuroscience and Innovative Drug Research. Jinan University Guangzhou 510632China Division of Life Science Division of Biomedical Engineering and State Key Laboratory of Molecular Neuroscience. The Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina

Neuroligins(NLs) are postsynaptic cell-adhesion proteins that play important roles in synapse formation and the excitatory-inhibitory balance. They have been associated with autism in both human genetic and animal model studies, and affect synaptic connections and synaptic plasticity in several brain regions. Yet current research mainly focuses on pyramidal neurons, while the function of NLs in interneurons remains to be understood. To explore the functional difference among NLs in the subtypespecific synapse formation of both pyramidal neurons and interneurons, we performed viral-mediated shRNA knockdown of NLs in cultured rat cortical neurons and examined the synapses in the two major types of neurons. Our results showed that in both types of neurons, NL1 and NL3 were involved in excitatory synapse formation, and NL2 in GABAergic synapse formation. Interestingly, NL1 affectedGABAergic synapse formation more specifically than NL3,and NL2 affected excitatory synapse density preferentially in pyramidal neurons. In summary, our results demonstrated that different NLs play distinct roles in regulating the development and balance of excitatory and inhibitory synapses in pyramidal neurons and interneurons.

关键词： Neuroligin Synapse formation Excitatory/inhibitory balance Interneuron

Nutritional strategies for reducing nitrogen, phosphorus and trace mineral excretions of livestock and poultry

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Journal of Integrative Agriculture 2017年第12期16卷 2815-2833页

作者： LU lin liao Xiu-dong LUO Xu-gang Mineral Nutrition Research Division Institute of Animal Science Chinese Academy of Agricultura Sciences Beijing 100193 P.R.China

Animal agriculture contributes to environmental pollutions through the surplus nitrogen（N）, phosphorus（P）, and trace minerals that animals excrete. Animal nutritionists have sought alternatives to formulate more efficient diets and reduce production costs and environmental concerns. In general, element excretions may be reduced by avoiding the overfeeding of specific elements or using nutritional approaches to improve element utilizations by the animals. Several nutritional strategies are possible for minimizing N, P, and trace mineral excretions： 1） to accurately meet dietary N, P and trace mineral requirements of animals, which includes reducing the dietary crude protein contents with synthetic amino acids or feeding high rumenally undegraded protein, minimizing the adequate levels of dietary P and trace elements, adopting phase or group-feeding program, and considering the bioavailable trace mineral contents in the feed ingredients; 2） to improve the bioavailabilities of dietary N, P, and trace elements for animals by using some additives（enzymes, growth promoters, probiotics, prebiotics, vitamin D isomers, and organic acids）; 3） to use highly available P sources or organic trace elements. In the future, nutrient strategies must be integrated into total production systems so that animal production systems are environmentally safe as well as economically viable.

关键词： nutritional strategies nitrogen phosphorus trace minerals animal excretions

Relationship between use of selective serotonin reuptake inhibitors and irritable bowel syndrome: A populationbased cohort study

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World Journal of Gastroenterology 2017年第19期23卷 3513-3521页

作者： Wan-Tzu lin Yi-Jun liao Yen-Chun Peng Chung-Hsin Chang Ching-Heng lin hong-Zen Yeh Chi-Sen Chang Division of Gastroenterology and Hepatology Department of Internal MedicineTaichung Veterans General Hospital Division of Gastroenterology and Hepatology Department of Internal MedicinePuli Branch of Taichung Veterans General Hospital Faculty of Medicine College of MedicineNational Yang-Ming University Taichung Veteran General Hospital

AIM To investigate the relationship between selective serotonin reuptake inhibitor(SSRI)use and the subsequent development of irritable bowel syndrome(IBS).METHODS This retrospective,observational,population-based cohort study collected data from Taiwan’s National Health Insurance Research Database.A total of 19653patients newly using SSRIs and 78612 patients not using SSRIs,matched by age and sex at a ratio of 1:4, were enrolled in the study from January 1,2000 to December 31,*** patients were followed until IBS diagnosis,withdrawal from the National Health Insurance system,or the end of *** analyzed the effects of SSRIs on the risk of subsequent IBS using Cox proportional hazards regression *** A total of 236 patients in the SSRI cohort(incidence,2.17/1000 person-years)and 478 patients in the comparison cohort(incidence,1.04/1000 person-years)received a new diagnosis of *** mean follow-up period from SSRI exposure to IBS diagnosis was *** incidence of IBS increased with advancing *** with anxiety disorders had a significantly increased adjusted hazard ratio(a HR)of IBS(a HR=1.33,95%CI:1.11-1.59,P=0.002).After adjusting for sex,age,urbanization,family income,area of residence,occupation,the use of anti-psychotics and other comorbidities,the overall a HR in the SSRI cohort compared with that in the comparison cohort was1.74(95%CI:1.44-2.10;P<0.001).The cumulative incidence of IBS was higher in the SSRI cohort than in the non-SSRI cohort(log-rank test,P<0.001).CONCLUSION SSRI users show an increased risk of subsequent diagnosis of IBS in Taiwan.

关键词： Brain-gut axis Irritable bowel syndrome Selective serotonin reuptake inhibitor

Development and validation of a new oxide fuel rod performance analysis code for the liquid metal fast reactor

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Nuclear Science and Techniques 2022年第5期33卷 167-177页

作者： Guang-Liang Yang Hai-Long liao Tao Ding hong-Li Chen School of Nuclear Science and Technology University of Science and Technology of ChinaHefei230026China

The integrity and reliability of fuel rods under both normal and accidental operating conditions are of great importance for nuclear *** this study,considering various irradiation behaviors,a fuel rod performance analysis code,named KMC-Fueltra,was developed to evaluate the thermal–mechanical performance of oxide fuel rods under both normal and transient conditions in the *** accuracy and reliability of the KMC-Fueltra were validated by analytical solutions,as well as the results obtained from codes and *** results indicated that KMC-Fueltra can predict the performance of oxide fuel rods under both normal and transient conditions in the LMFR.

关键词： Fuel rod analysis code Thermal-mechanical performance Irradiation behaviors Pellet-cladding mechanical interaction Liquid metal fast reactor

Formation of interlayer gap and control of interlayer burr in dry drilling of stacked aluminum alloy plates

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Chinese Journal of Aeronautics 2016年第1期29卷 283-291页

作者： Tian Wei Hu Jian liao Wenhe Bu Yin Zhang lin College of Mechanical and Electronical Engineering Nanjing University of Aeronautics and Astronautics

In aircraft assembly, interlayer burr formation in dry drilling of stacked metal materials is a common problem. Traditional manual deburring operation seriously affects the assembly qual- ity and assembly efficiency, is time-consuming and costly, and is not conducive to aircraft automatic assembly based on industrial robot. In this paper, the formation of drilling exit burr and the influ- ence of interlayer gap on interlayer burr formation were studied, and the mechanism of interlayer gap formation in drilling stacked aluminum alloy plates was investigated, a simplified mathematical model of interlayer gap based on the theory of plates and shells and finite element method was established. The relationship between interlayer gap and interlayer burr, as well as the effect of feed rate and pressing force on interlayer burr height and interlayer gap was discussed. The result shows that theoretical interlayer gap has a positive correlation with interlayer burr height and preloading nressing force is an effective method to control interlaver burr formation.

关键词： Aircraft assembly Drilling Gap formation Interlayer burr Pressing force Stacked metal materials Thrust force