检索结果-南通市图书馆

Simulation study on thermal performance of two turns helium cryogenic oscillating heat pipe for superconducting accelerator

在线全文

学校读者我要写书评

暂无评论

Radiation Detection Technology and Methods 2023年第3期7卷 427-434页

作者： Yi Huo Changcheng Ma Jun Zhang Rui Huang rui Ge University of Chinese Academy of Sciences BeijingChina Institute of High Energy Physics BeijingChina Hefei University of Technology HefeiChina

Purpose In recent years,with the further development of superconducting technology,superconducting devices have been applied in particle accelerators and synchrotron radiation light source devices.As a new type of heat transfer structure,helium cryogenic oscillating heat pipe can be used to balance local hot spots in superconductors and improve heat transfer performance.Methods In this paper,a two-dimensional two-turns helium cryogenic oscillating heat pipe model is established.The flow performance of helium cryogenic oscillating heat pipe was analyzed by CFD simulation.Results and conclusion The results show that the development of flow pattern in the helium cryogenic oscillating heat pipe first forms bubble flow under the heating of the evaporation section,and then gradually forms slug flow and annular flow.The process consists of initial stage,transition stage and running stage.In the running stage,the effective thermal conductivity of COHP oscillates around 15,000 W/(m·K).

关键词： Cryogenic oscillating heat pipe Helium CFD simulation Superconducting accelerator

Changes in the gut microbiota of osteoporosis patients based on 16S rRNA gene sequencing:a systematic review and meta-analysis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2022年第12期23卷 1002-1013页

作者： Rui Huang Pan LIU Yiguang BAI Jieqiong huang rui PAN Huihua LI Yeping SU Quan ZHOU ruixin MA Shaohui ZONG Gaofeng ZENG College of Public Hygiene of Guangxi Medical University Nanning 530021China Department of Spine Osteopathic the First Affiliated Hospital of Guangxi Medical UniversityNanning 530021China Department of Orthopaedics the Third Affiliated Hospital of Xinxiang Medical UniversityNanning 530022China Department of Orthopaedics Nanchong Central Hospitalthe Second Clinical Institute of North Sichuan Medical CollegeXinxiang 45300China Department of Wound Repair the First People’s Hospital of NanningNanchong 637000China

Background:Osteoporosis(OP)has become a major public health issue,threatening the bone health of middle-aged and elderly people from all around the world.Changes in the gut microbiota(GM)are correlated with the maintenance of bone mass and bone quality.However,research results in this field remain highly controversial,and no systematic review or meta-analysis of the relationship between GM and OP has been conducted.This paper addresses this shortcoming,focusing on the difference in the GM abundance between OP patients and healthy controls based on previous 16S ribosomal RNA(rRNA)gene sequencing results,in order to provide new clinical reference information for future customized prevention and treatment options of OP.Methods:According to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses(PRISMA),we comprehensively searched the databases of Pub Med,Web of Science,Embase,Cochrane Library,and China National Knowledge Infrastructure(CNKI).In addition,we applied the R programming language version 4.0.3 and Stata 15.1 software for data analysis.We also implemented the Newcastle-Ottawa Scale(NOS),funnel plot analysis,sensitivity analysis,Egger’s test,and Begg’s test to assess the risk of bias.Results:This research ultimately considered 12 studies,which included the fecal GM data of 2033 people(604 with OP and 1429 healthy controls).In the included research papers,it was observed that the relative abundance of Lactobacillus and Ruminococcus increased in the OP group,while the relative abundance for Bacteroides of Bacteroidetes increased(except for Ireland).Meanwhile,Firmicutes,Blautia,Alistipes,Megamonas,and Anaerostipes showed reduced relative abundance in Chinese studies.In the linear discriminant analysis Effect Size(LEfSe)analysis,certain bacteria showed statistically significant results consistently across different studies.Conclusions:This observational meta-analysis revealed that changes in the GM were correlated with OP,and variations in some advantageous GM might involve regional differences.

关键词： Osteoporosis Microbiome Intestinal 16S ribosomal RNA(rRNA)sequencing

Circulation in the South China Sea is in a state of forced oscillation:Results from a simple reduced gravity model with a closed boundary

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2022年第7期41卷 1-12页

作者： rui Xin huang Hui Zhou Woods Hole Oceanographic Institution Woods HoleFalmouthMassachusetts02543USA Key Laboratory of Ocean Circulation and Waves Institute of OceanologyChinese Academy of SciencesQingdao266071China Laboratory for Ocean Dynamics and Climate Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao266237China University of Chinese Academy of Sciences Beijing100049China

The South China Sea(SCS)is a narrow semi-enclosed basin,ranging from 4°–6°N to 21°–22°N meridionally.It is forced by a strong annual cycle of monsoon-related wind stress.The Coriolis parameter f increases at least three times from the southern basin to the northern basin.As a result,the basin-cross time for the first baroclinic Rossby wave in the southern part of the basin is about 10-times faster than that in the northern part,which plays the most vitally important role in setting the circulation.At the northernmost edge of SCS,the first baroclinic Rossby wave takes slightly less than 1 year to move across the basin,however,it takes only 1–2 months in the southernmost part.Therefore,circulation properties for a station in the model ocean are not solely determined by the forcing at that time instance only;instead,they depend on the information over the past months.The combination of a strong annual cycle of wind forcing and large difference of basin-cross time for the first baroclinic Rossby wave leads to a strong seasonal cycle of the circulation in the SCS,hence,the circulation is dominated by the forced oscillations,rather than the quasi-steady state discussed in many textbooks.The circulation in the SCS is explored in detail by using a simple reduced gravity model forced by seasonally varying zonal wind stress.In particular,for a given time snap the western boundary current in the SCS cannot play the role of balancing mass transport across each latitude nor balancing mechanical energy and vorticity in the whole basin.In a departure from the steady wind-driven circulation discussed in many existing textbooks,the circulation in the SCS is characterized by the imbalance of mechanical energy and vorticity for the whole basin at any part of the seasonal cycle.In particular,the western boundary current in the SCS cannot balance the mass,mechanical energy,and vorticity in the seasonal cycle of the basin.Consequently,the circulation near the western boundary cannot be interpreted in terms of the wind stress and therm

关键词： South China Sea ocean circulation annual cycle first baroclinic Rossby wave propagation western boundary current forced ossilation

A Server Placement Algorithm for Reducing Risk and Improving Power Utilization in Data Centers

在线全文

学校读者我要写书评

暂无评论

Tsinghua Science and Technology 2024年第1期29卷 158-173页

作者： rui Chen Huikang huang Xiaoxuan Luo Weiwei Lin School of Computer Science and Engineering South China University of TechnologyGuangzhou 510006China Peng Cheng Laboratory Shenzhen 518066China

As the power demand in data centers is increasing,the power capacity of the power supply system has become an essential resource to be optimized.Although many data centers use power oversubscription to make full use of the power capacity,there are unavoidable power supply risks associated with it.Therefore,how to improve the data center power capacity utilization while ensuring power supply security has become an important issue.To solve this problem,we first define it and propose a risk evaluation metric called Weighted Power Supply Risk(WPSRisk).Then,a method,named Hybrid Genetic Algorithm with Ant Colony System(HGAACS),is proposed to improve power capacity utilization and reduce power supply risks by optimizing the server placement in the power supply system.HGAACS uses historical power data of each server to find a better placement solution by population iteration.HGAACS possesses not only the remarkable local search ability of Ant Colony System(ACS),but also enhances the global search capability by incorporating genetic operators from Genetic Algorithm(GA).To verify the performance of HGAACS,we experimentally compare it with five other placement algorithms.The experimental results show that HGAACS can perform better than other algorithms in both improving power utilization and reducing the riskof powersupply system.

关键词： server placement power utilization power supply risk swarm intelligence algorithm

Human Monoclonal Antibodies: On the Menu of Targeted Therapeutics Against COVID-19

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Virologica Sinica 2020年第6期35卷 713-724页

作者： Junsen Chen Rui Huang Yiwen Nie Xinyue Wen Ying Wu State Key Laboratory of Virology School of Basic Medical SciencesWuhan UniversityWuhan 430072China Hubei Province Key Laboratory of Allergy and Immunology Wuhan 430072China

Coronavirus disease 2019(COVID-19), reminiscent of the severe acute respiratory syndrome(SARS) outbreak in 2003,has been a tragic disaster to people all over the world. As there is no specific drug for COVID-19, neutralizing antibodies are attracting more and more attention as one of the most effective means to combat the pandemic. Here, we introduced the etiological and serological characteristics of COVID-19, discussed the current stage of development of human monoclonal antibodies against SARS-CoV-2 and summarized the antigenic epitopes in the S glycoprotein, which may deepen the understanding of the profile of immune recognition and response against SARS-CoV-2 and provide insight for the design of effective vaccines and antibody-based therapies.

关键词： COVID-19 mAbs S glycoprotein Epitopes

Competitive and Cooperative-Based Strength Pareto Evolutionary Algorithm for Green Distributed Heterogeneous Flow Shop Scheduling

在线全文

学校读者我要写书评

暂无评论

Intelligent Automation & Soft Computing 2023年第8期37卷 2077-2101页

作者： Kuihua huang rui Li Wenyin Gong Weiwei Bian rui Wang College of System Engineering National University of Defense TechnologyChangsha410073China School of Computer Science China University of GeosciencesWuhan430074China Equipment General Technology Laboratory Beijing Mechanical Equipment Research InstituteBeijing100854China

This work aims to resolve the distributed heterogeneous permutation flow shop scheduling problem(DHPFSP)with minimizing makespan and total energy consumption(TEC).To solve this NP-hard problem,this work proposed a competitive and cooperative-based strength Pareto evolutionary algorithm(CCSPEA)which contains the following features:1)An initialization based on three heuristic rules is developed to generate a population with great diversity and convergence.2)A comprehensive metric combining convergence and diversity metrics is used to better represent the heuristic information of a solution.3)A competitive selection is designed which divides the population into a winner and a loser swarms based on the comprehensive metric.4)A cooperative evolutionary schema is proposed for winner and loser swarms to accelerate the convergence of global search.5)Five local search strategies based on problem knowledge are designed to improve convergence.6)Aproblem-based energy-saving strategy is presented to reduce TEC.Finally,to evaluate the performance of CCSPEA,it is compared to four state-of-art and run on 22 instances based on the Taillard benchmark.The numerical experiment results demonstrate that 1)the proposed comprehensive metric can efficiently represent the heuristic information of each solution to help the later step divide the population.2)The global search based on the competitive and cooperative schema can accelerate loser solutions convergence and further improve the winner’s exploration.3)The problembased initialization,local search,and energy-saving strategies can efficiently reduce the makespan and TEC.4)The proposed CCSPEA is superior to the state-of-art for solving DHPFSP.

关键词： Distributed heterogeneous flow shop scheduling green scheduling SPEA2 competitive and cooperative

Construction of ternary CuO/CuFe_(2)O_(4)/g-C_(3)N_(4)composite and its enhanced photocatalytic degradation of tetracycline hydrochloride with persulfate under simulated sunlight

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2022年第2期34卷 59-70页

作者： Lei Wang Xiaolei Ma Guofang huang rui Lian Jingwei huang Houde She Qizhao Wang Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials College of Chemistry and Chemical EngineeringNorthwest Normal UniversityLanzhou 730070China School of Environmental Science and Engineering Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of Ministry of EducationChang'an UniversityXi'an 710054China

In this study,a graphitic carbon nitride(g-C_(3)N_(4))based ternary catalyst Cu O/Cu Fe_(2)O_(4)/gC_(3)N_(4)(CCCN)is successfully prepared thorough calcination method.After confirming the structure and composition of CCCN,the as-synthesized composites are utilized to activate persulfate(PS)for the degradation of organic contaminant.While using tetracycline hydrochloride(TC)as pollutant surrogate,the effects of initial p H,PS and catalyst concentration on the degradation rate are systematically studied.Under the optimized reaction condition,CCCN/PS is able to give 99%degradation extent and 74%chemical oxygen demand removal in assistance of simulated solar light,both of which are apparently greater than that of either Cu O/Cu Fe_(2)O_(4)and pristine g-C_(3)N_(4).The great improvement in degradation can be assignable to the effective separation of photoinduced carriers thanks to the integration between Cu O/Cu Fe_(2)O_(4)and g-C_(3)N_(4),as well as the increased reaction sites given by the g-C_(3)N_(4)substrate.Moreover,the scavenging trials imply that the major oxidative matters involved in the decomposition are hydroxyl radicals(·OH),superoxide radicals(·O_(2)^(-))and photo-induced holes(h^(+)).

关键词： Copper ferrite Graphitic carbon nitride Heterojunction photocatalyst Peroxydisulfate Tetracycline hydrochloride

A network-based virtual slack bus model for energy conversion units in dynamic energy flow analysis

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2023年第1期66卷 243-254页

作者： huang YuJia SUN QiuYe WANG rui LIU GuangLiang School of Information Science and Engineering Northeastern UniversityShenyang 110819China

Integrated energy system(IES) is a viable route to “carbon peak and carbon neutral”. As the basis and cornerstone of economic operation and security of IES, energy flow calculation(EFC) has been widely studied. Traditional EFC focuses on the single or distributed slack bus models, which results in the lack of unlimited power to maintain system operation, especially for electric power grid working in islanded or coupled mode. To deal with this problem, this paper proposes a network-based virtual-slack bus(VSB) model in EFC. Firstly, considering the anticipated growth of energy conversion units(ECUs) with power adjustment capacity, the generators and ECUs are together modeled as a virtual slack bus model to reduce the concentrated power burden of IES. Based on this model, a power sensitivity method is designed to achieve the power sharing among the ECUs, where the power can be allocated adaptively based on the network conditions. Moreover, the method is helpful to maintain the voltage and pressure profile of IES. With these changes, a dynamic energy flow analysis including virtual slack bus types is extended for IES.It can realize the assessment of the system state. Finally, simulation studies illustrate the beneficial roles of the VSB model.

关键词： integrated energy system energy flow analysis power sensitivity method virtual slack bus

Prof. Huan-Yong Chen： a leading botanist and taxonomist, one of the pioneers and founders of modern plant taxonomy in China

在线全文

学校读者我要写书评

暂无评论

Protein & Cell 2016年第11期7卷 773-776页

作者： rui-Lan huang South China Botanical Garden Chinese Academy of Sciences Guangzhou 510650 China

Prof. Huan-Yong Chen （Woon-Young Chun, 陈焕镛, 1890- 1971）, a leading botanist and taxonomist （Fig. 1）, who started a new era for the modern plant science in China and made a great contribution to the plant taxonomy, botany and horticulture of China, especially in Southern China. He was one of the first academicians of the Chinese Academy of Sciences （CAS）, a member of the first, second and third China＇s National People＇s Congress （NPC）, one of the first editors of Flora of Republicae Popularis Sinicae （FRPS,

关键词： South China Botanical Garden (SCBG) Chinese Botanists Flora Republicae Popularis Sinicae Identifying Plant Specimens Honorary Vice-President