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Journal of Hydrodynamics 2019年第5期31卷 1060-1068页

作者： Wei Dong Wu-li Chu Zai-lun Liu College of Water Resources and Architectural Engineering Northwest A&F UniversityYangling 712100China School of Power and Energy Northwestern Polytechnical UniversityXi'an 710129China College of Energy and Power Engineering Lanzhou University of TechnologyLanzhou 730050China

The diameter of the impeller balance hole in a centrifugal pump is closely related to axial ***,to select the appropriate diameter of a balance hole is crucial for balancing the axial force of the centrifugal *** the validation of the CFD method and the grids independence study,the characteristics of flow in the hub cavity have been analyzed in 4 cases with different diameters of balance *** leakage rate of the liquid in the hub cavity of the centrifugal pump is calculated and compared with the test *** to the research,when no balance hole exists,the distribution of liquid velocity in the core area of the hub cavity exhibits axial symmetry,and the circumferential velocity component is approximately 0.4 times of the impeller's rotational *** the balance hole exists,the distribution of liquid velocity in the hub cavity does not exhibit axial symmetry,and the circumferential velocity component is larger than 0.4 times of the impeller's rotational *** radial leakage velocity on the turbulent boundary layer of the pump cover will increase with the increasing diameter of the balance hole.

关键词： Centrifugal pump balance hole hub cavity circumferential velocity component radial velocity component

iPlant Systems Biology (iPSB): An International Network hub in the Plant Community

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Molecular Plant 2019年第6期12卷 727-730页

作者： Pascal Falter-Braun Siobhan Brady Rodrigo A.Gutierrez Gloria M.Coruzzi Gabriel Krouk Institute of Network Biology (INET) Helmholtz Zentrum Munchen (HMGU) 85764 Munchen-Neuherberg Germany Microbe-Host Interactions Faculty of Biology. Ludwig-Maximilians-University (LMU) Munich 82152 Planegg-Martinsried Germany Department of Plant Biology and the Genome Center University of California Davis CA 95616 USA Departamento de Genetica Molecular y Microbiologia FONDAP Center for Genome Regulation Millennium Institute for Integrative Biology Pontificia Universidad Catolica de Chile Santiago 8331150 Chile Center for Genomics and Systems Biology Department of Biology New York University New York NY 10003 USA B&PMP Univ Montpellier CNRS INRA SupAgro Montpellier France

sequenced genome of a multicellular organism (Arabidopsis Genome, 2000) completed just after those of the nematode Caenorhabditis elegans (C. elegans Sequencing Consortium, 1998) and the fruit fly Drosophila melanogaster (Adams et al., 2000). Availability of a full whole-genome sequence for the reference plant opened to plant biologists what is commonly called the post-genomic era.

关键词： Systems Biology International Network hub Plant Community

Systemic omics analysis of the hub genes, proteins, metabolites and metabolic pathways related to the hypoxia preconditioning in mice

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中国药理学通报 2015年第B11期31卷 12-13页

作者： XIABin-bin ZHOUTao CUICAN CHENGHai-ting WANGMing-ming SUSu LIJing-yi ZHAOYu-ming LIXiao-rong DeptofPharmacology SchoolofBasicMedicalSciencesCapitalMedicalUniversityBeijing100069 BeijingLaboratoryforBiomedicalDetectionTechnologyandInstrument Beijing100069

Hypoxia preconditioning （HPC） is associated with many complicated pathophysiological and biochemical processes that integrated and regulated via molecular levels. HPC could protect cells, tissues, organs and systems from hypoxia injury, but up to date, the molecular mechanism still remained unclear. The acute and repetitive hy- poxia preconditioning model was constructed and the related parameters were observed. The high-throughput mi- croarray analysis and multiple bioinformatics were used to explore the differentially expressed genes in HPC mice brain and the related gene network, pathways and biological processes related to HPC. The 2D-DIGE coupled with MALDI-TOF/TOF-MS was performed to identify these proteins that were differentially expressed during HPC. The UPLC-HRMS based metabolomics method was utilized to explore the key endogenous metabolites and metabolic pathways related to HPC. The results showed that （1） 1175 differentially expressed genes in HPC mice brain were identified. Fourteen of these genes were the related hub genes for HPC, including Cacna2dl, Grin2a, Npylr, Mef2c, Epha4, Rxfpl, Chrm3, Pdela, Atp2b4, Glral, Idil , Fgfl, Grin2b and Cda. The change trends of all the detected genes by RT-PCR were consistent with the data of gene chips. There were 113 significant functions up- regulated and 138 significant functions down-regulated in HPC mice. （2） About 2100 proteins were revealed via the gel imaging and spot detection. 66, 45 and 70 of proteins were found to have significantly difference between the control group and three times of HPC group, the control and six times of HPC, and the three times of HPC and six times of HPC group. （3）Some endogenous metabolites such as phenylalanine, valine, proline, leucine and glu- tamine were increased, while ereatine was decreased, both in HPC brain and heart; in addition, y-aminobutyric acid was markedly decreased in brain. The sphingolipid metabolic pathways were noticed due to the low p-value and high

关键词： Identification omics hub genes proteins metabolites network analysis metabolic pathways by-poxia preconditioning

基于延迟理论的Supply hub出库调度模型

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系统工程理论与实践 2015年第4期35卷 904-910页

作者：蒋丽梁昌勇合肥工业大学管理学院合肥230009 过程优化与智能决策教育部重点实验室合肥230009

考虑了配送准时性和配送成本之间的悖反关系,将延迟理论引入配送调度,研究了订单随机到达、准时配送的supply hub的出库调度问题.考虑订单到达时间的随机性对配送准时性的影响,设计了一个带延迟因子的滚动调度模型,建立了supply hub准... 详细信息

考虑了配送准时性和配送成本之间的悖反关系,将延迟理论引入配送调度,研究了订单随机到达、准时配送的supply hub的出库调度问题.考虑订单到达时间的随机性对配送准时性的影响,设计了一个带延迟因子的滚动调度模型,建立了supply hub准时制配送的出库调度多目标规划模型.根据模型的特点,设计了求解模型的克隆免疫算法.最后,结合数值实验,对延迟调度模型和实际使用的调度模型进行了对比分析.研究结果表明,带延迟因子的调度模型相比常规调度策略.能明显降低随机性订单的配送成本.

关键词： supply hub 延迟 just in time(JIT) 调度免疫算法

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基于图模型的hub网络的结构学习

西北工业大学学报 2019年第6期37卷 1320-1325页

作者：张重阳郭骁张海西北大学数学学院陕西西安710127 中国西安卫星测控中心陕西西安710043 宇航动力学国家重点实验室陕西西安710043

聚焦于具有hub的网络结构学习问题。在邻域选择框架下,基于hub网络的特点在模型中加入L1和L2正则子,从而分别引入网络的稀疏性先验和hub网络的组先验,使所得网络更容易产生hub。对于所得模型,采用坐标下降法求解。模拟数据和实际数据实... 详细信息

聚焦于具有hub的网络结构学习问题。在邻域选择框架下,基于hub网络的特点在模型中加入L1和L2正则子,从而分别引入网络的稀疏性先验和hub网络的组先验,使所得网络更容易产生hub。对于所得模型,采用坐标下降法求解。模拟数据和实际数据实验表明所提模型在参数估计、模型选择方面的有效性和实用性,并说明了调控参数对模型的影响。

关键词：图模型网络 hub 邻域选择

Environmental impact assessment of magnesium alloy automobile hub based on life cycle assessment

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Journal of Central South University 2018年第8期25卷 1870-1878页

作者： YI Qiu-ping TANG Chang-ping Institute for Hunan Innovation & Development Research Hunan University of Science and Technology Key Defense Laboratory of High Temperature Wear-resisting Materials and Preparation Technology of Hunan Province Hunan University of Science and Technology

In order to find out the impact of aluminum alloy hub replaced by the magnesium alloy hub on environment,the resource consumption,energy consumption and pollutant emission during hub production and their service life of the two types of hubs are investigated based on the life cycle assessment(LCA)*** results indicate that the adverse impact on environment can be effectively reduced by the application of magnesium alloy *** with aluminum alloy hubs,the global warming potential(GWP)and human toxicity potential(HTP)are reduced by 39.6%and 24.0%,***2 is the main pollutant in the life cycles of the two kinds of hubs,which is generated throughout the whole life cycle including the fabrication process and the service life,while the pollutants of particles mainly come from the fabrication *** with the aluminum alloy hubs,the green effect brought by magnesium alloy hubs is mainly due to the reduction of fuel consumption caused by weight loss.

关键词： life cycle assessment theory magnesium alloy aluminum alloy hub environmental impact

An Evaluation of West and Central African Ports to Serve as a hub on the Gulf of Guinea Container Ports Range

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Open Journal of Applied Sciences 2019年第4期9卷 285-305页

作者： Balla Nguele Veronique Youfang Huang Scientific Research Academic of Shanghai Maritime University Shanghai China

The level of competitions among ports keep increasing as port worldwide keep upgrading and expanding their port infrastructures so as to capture the greater share of the market. Every continent phases these competitions. This phenomenon is more prominent in developed countries where ports do not only compete among regional ports but also compete with other ports within the same country such as in America, some European countries and part of Asia like in China. However, the situation is a bit different when it comes to African ports. Most African ports have poor infrastructures and limited technological investments and so port competitions in the African continent cannot be compared with that of the western ports. Despite these setbacks, there is a significant amount of competition among these African ports, especially on a regional basis. The aim of this paper is to determine which port can serve as a hub port between the West and Central African ports along the Gulf of Guinea. The method that will be used to evaluate these ports will be a port indexing method. This method considers different indices for port evaluation to determine the most suitable port. The port of Tema appeared as the most suitable port to serve as a hub port.

关键词： Port Index hub Port Competition Transhipment WCA Network Optimization

Constructing Hongqiao hub and Serving Regional Economy:Planning and Operation of Hongqiao Comprehensive Transportation hub

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China City Planning Review 2011年第4期20卷 40-47页

作者： DONG Runrun, LIU Wujun,LI Caige School of Economics & Management, Tongji University Shanghai Hongqiao Integrated Transportation hub Project Construction Headquarter

Taking Hongqiao Integrated Transportation hub Project as a case, this paper introduces its origin, orientation, development programming, planning and design, road planning, information system planning, air-rail integr... 详细信息

关键词： transportation hub development programming air-rai

Optimal Operation and Size for an Energy hub with CCHP

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Energy and Power Engineering 2011年第5期3卷 641-649页

作者： Ali Mohammad Ranjbar Amir Moshari Hashem Oraee Aras Sheikhi 不详

The interest in distributed generation has been increasing in recent years, especially due to technical devel- opment on generation systems that meet environmental and energy policy concerns. One of the most impor- tant distributed energy technologies is Combined Cooling, Heat and Power (CCHP) systems. CCHP is a small and self-contained electric, heating and cooling generation plant that can provide power for households, commercial or industrial facilities. It can reduce power loss and enhance service reliability in distribution systems. The proposed method in this paper determines the optimal size and operation of CCHP, auxiliary boiler and also heat storage unit as elements of an energy hub, for users by an integrated view of electricity and natural gas network. Authors apply cost and benefit analysis in the optimization. To confirm the proposed method, the optimum sizes of these elements are determined for a hotel in Tehran as a case study.

关键词： Combined Cooling Heating And Power (CCHP) Cost And Benefit Analysis Energy hub Optimal Operation Optimal Size

The hub Status and Transportation Network of Kribi Port

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Open Journal of Applied Sciences 2018年第6期8卷 226-270页

作者： Che Kingsleychenikwi Xuefeng Wang Institute of Scientific Research Shanghai Maritime University Shanghai China College of Logistics Engineering Shanghai Maritime University Shanghai China

In this paper, a study on four African ports was taken out that all have the ca-pability to become a hub port that can serve the central African region. The paper sort to determine which port was most suitable and port indexing was the method that was used to evaluate these ports. The ports evaluated were the port of Kribi, the port of Bata, the port of Libreville and the port of Pointe-Noire. There were other models that were also used which included linear regression and linear programming which all contributed to providing the final results of the port with the most suitable potential to serve as a hub port and meaningful results were obtained. The final results showed that the port of Pointe-Noire was the most suitable port to serve the central African region as a hub port.

关键词： hub Port Kribi Port Intermodal Network Shipping Network Logistics Transhipment Transportation Indexing