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Resource Virtualization Model Using Hybrid-graph Representation and Converging Algorithm for Cloud Computing

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International Journal of Automation and computing 2013年第6期10卷 597-606页

作者： Quan Liang Yuan-zhuo wang Yong-Hui Zhang School of Information Sciences and Engineering Fujian University of Technology Institute of Computing Technology Chinese Academy of Sciences

Cloud computing can provide a great capacity for massive computing, storage as well as processing. The capacity comes from the cloud computing system itself, which can be likened to a virtualized resource pool that supports virtualization applications as well as load migration. Based on the existing technologies, the paper proposes a resource virtualization model （RVM） utilizing a hybrid-graph structure. The hybrid-graph structure can formally represent the critical entities such as private clouds, nodes within the private clouds, and resource including its type and quantity. It also provides a clear description of the logical relationship and the dynamic expansion among them as well. Moreover, based on the RVM, a resource converging algorithm and a maintaining algorithm of the resource pool which can timely reflect the dynamic variation of the private cloud and resource are presented. The algorithms collect resources and put them into the private cloud resource pools and global resource pools, and enable a real-time maintenance for the dynamic variation of resource to ensure the continuity and reliability. Both of the algorithms use a queue structure to accomplish functions of resource converging. Finally, a simulation platform of cloud computing is designed to test the algorithms proposed in the paper. The results show the correctness and the reliability of the algorithms.

关键词： Cloud computing resource virtualization hybrid graph resource converging simulation.

Loss of silencing activity caused by 5′-terminal modification with D-/L-isonucleotide(isoNA) or locked nucleic acid(LNA) could not be restored by 5′-terminal phosphorylation

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Science China Chemistry 2014年第2期57卷 329-334页

作者： HUANG Ye CHEN zhuo wang zhuo LI YaTing CHEN Yue YANG ZhenJun ZHANG LiHe The State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University

In this study,a series of 5′-phosphorylated siRNAs with D-/L-isonucleotide(isoNA)or locked nucleic acid(LNA)incorporated at the 5′-terminus were *** was found that after incorporating either isoNA or LNA at the 5′-terminus of the antisense strand or sense strand,the silencing activity of modified strands has been inhibited,which cannot be recovered by phosphorylation at the 5′-terminus;however,the silencing activity of unmodified strand to its own target was *** work indicates that the isoNA and LNA modification at 5′-terminus can interfere with the strand selection during the RISC assembling process,and the disturbance of the 5′-phosporylation should not be the only viable mechanism.

关键词： isonucleotide locked nucleic acid (LNA) 5'-terminal phosphorylation

Multi-scale modeling of Arabidopsis thaliana response to different CO2 conditions： From gene expression to metabolic flux

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Journal of Integrative Plant Biology 2016年第1期58卷 2-11页

作者： Lin Liu Fangzhou Shen Changpeng Xin zhuo wang School of Life Sciences and Biotechnology Shanghai Jiao Tong University Shanghai 200240 China Key Laboratory of Computational Biology CAS-MPG Partner Institute for Computational Biology Shanghai Institutes of Biological Sciences Chinese Academy of Sciences Shanghai 200031 China Shanghai Botanical Garden Shanghai 200231 China

Multi-scale investigation from gene transcript level to metabolic activity is important to uncover plant response to environment perturbation. Here we integrated a genome-scale constraint-based metabolic model with transcriptome data to explore Arabidopsis thaliana response to both elevated and low CO2 conditions. The four condition-specific models from low to high CO2 concentrations show differences in active reaction sets, enriched pathways for increased/decreased fluxes, and putative post-transcriptional regulation, which indicates that condition-specific models are necessary to reflect physiological metabolic states. The simulated CO2 fixation flux at different CO2 concentrations is consistent with the measured Assim- ilation-CO2intercellular curve. Interestingly, we found that reac- tions in primary metabolism are affected most significantly by CO2 perturbation, whereas secondary metabolic reactions are not influenced a lot. The changes predicted in key pathways are consistent with existing knowledge. Another interesting point is that Arabidopsis is required to make stronger adjustment on metabolism to adapt to the more severe low CO2 stress than elevated CO2. The challenges of identifying post-transcriptional regulation could also be addressed by the integrative model. In conclusion, this innovative application of multi-scale modeling in plants demonstrates potential to uncover the mechanisms of metabolic response to different conditions.

关键词： Metabolic model gene expression multi-scale analysis low/elevated CO2 post-transcriptional regulation

考虑梁端碰撞和动水压力作用对波形钢腹板连续刚构桥抗震性能影响分析

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工程抗震与加固改造 2024年第2期46卷 77-86页

作者：屈俊童补孟强王卓崔茂俊刘茜雷真云南大学建筑与规划学院云南昆明650504

以西南片区某库区的深水高墩大跨波形钢腹板连续刚构桥为工程背景,考虑梁端碰撞作用、动水压力以及二者同时作用的影响,采用OpenSees代码平台进行建模,并分别建立混凝土腹板连续刚构桥模型进行对比分析。分析天然地震动与人工地震动下... 详细信息

以西南片区某库区的深水高墩大跨波形钢腹板连续刚构桥为工程背景,考虑梁端碰撞作用、动水压力以及二者同时作用的影响,采用OpenSees代码平台进行建模,并分别建立混凝土腹板连续刚构桥模型进行对比分析。分析天然地震动与人工地震动下各个模型的地震响应,对比响应结果以探究梁端碰撞和动水压力对波形钢腹板桥的抗震性能影响。结果表明:动水压力对于桥梁自振特性影响主要在第十阶振型之后,梁端碰撞主要影响桥梁第四阶~七阶振型;动水压力会明显增加桥梁动力响应峰值;梁端碰撞作用会降低桥梁纵桥向位移响应,但会增大墩底弯矩;两者共同作用时会降低桥墩的位移与剪力,但会增加墩底的弯矩。

关键词：波形钢腹板桥 OpenSees 梁端碰撞动水压力动力响应

One-step accurate synthesis of shell controllable CoFe2O4 hollow microspheres as high-performance electrode materials in supercapacitor

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Nano Research 2016年第7期9卷 2026-2033页

作者： zhuo wang Wei Jia Menglei Jiang Chen Chen Yadong Li Department of Chemistry & Collaborative Innovation Center for Nanomaterial Science and Engineering Tsinghua University Beijing 100084 China Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100190 China

Multi-shelled CoFe2O4 hollow microspheres with a tunable number of layers （1-4） were successfully synthesized via a facile one-step method using cyclodextrin as a template, followed by calcination. The structural features, including the shell number and shell porosity, were controlled by adjusting the synthesis parameters to produce hollow spheres with excellent capacity and durability. This is a straightforward and general strategy for fabricating metal oxide or bimetallic metal oxide hollow microspheres with a tunable number of shells.

关键词： hollow spheres multi-shelled CoFe2O4 supercapacitor

Reducing partition skew on MapReduce: an incremental allocation approach

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Frontiers of Computer Science 2019年第5期13卷 960-975页

作者： zhuo wang Qun CHEN Bo SUO Wei PAN Zhanhuai LI School of Computer Science and Engineering North Western Polytechnical UniversityXi’an 710072 China

MapReduce,a parallel computational model,has been widely used in processing big data in a distributed *** of alternate map and reduce phases,MapReduce has to shuffle the intermediate data generated by mappers to *** key challenge of ensuring balanced workload on MapReduce is to reduce partition skew among reducers without detailed distribution information on mapped *** this paper,we propose an incremental data allocation approach to reduce partition skew among reducers on *** proposed approach divides mapped data into many micro-partitions and gradually gathers the statistics on their sizes in the process of *** micropartitions are then incrementally allocated to reducers in multiple *** propose to execute incremental allocation in two steps,micro-partition scheduling and micro-partition *** propose a Markov decision process (MDP)model to optimize the problem of multiple-round micropartition scheduling for allocation *** present an optimal solution with the time complexity of O(K· N2),in which K represents the number of allocation rounds and N represents the number of ***,we also present a greedy but more efficient algorithm with the time complexity of O(K.N ln N).Then,we propose a minmax programming model to handle the allocation mapping between micro-partitions and reducers,and present an effective heuristic solution due to its ***,we have implemented the proposed approach on Hadoop,an open-source MapReduce platform,and empirically evaluated its *** extensive experiments show that compared with the state-of-the-art approaches,the proposed approach achieves considerably better data load balance among reducers as well as overall better parallel performance.

关键词： incremental partitioning data balance MapReduce

医用激光定位仪在侧向操作位机房中的分布式安装方法

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中国医疗器械信息 2024年第1期30卷 72-74页

作者：李加荣汪卓赟安徽医科大学第二附属医院医学工程部安徽合肥230006

激光定位仪一般安装在电子直线加速器、模拟定位机、计算机体层成像机、磁共振成像设备、正电子发射计算机体层显像仪、数字减影血管造影机等设备上,用于病灶或治疗靶点的辅助定位,广泛应用于放射治疗、放射性粒子植入、微创手术等领域... 详细信息

激光定位仪一般安装在电子直线加速器、模拟定位机、计算机体层成像机、磁共振成像设备、正电子发射计算机体层显像仪、数字减影血管造影机等设备上,用于病灶或治疗靶点的辅助定位,广泛应用于放射治疗、放射性粒子植入、微创手术等领域。但有时碍于机房布局限制等原因,安装位置被占用,导致无法顺利安装激光定位仪。因此,文章推荐一种激光定位仪分布式安装的方法以解决这一矛盾。

关键词：激光定位仪侧向操作位分布式安装

交通强国战略背景下交通类车辆专业进阶式模块化人才培养体系优化

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中国现代教育装备 2024年第9期 124-127页

作者：李胜琴王琢范东溟东北林业大学机电工程学院黑龙江哈尔滨150040

立足交通大类下车辆专业的课程体系及培养模式,针对交通强国战略背景下交通大类下车辆专业的培养特色及育人目标,对课程体系进行梳理和重构,在此基础上进行人才培养体系及专业课教学模式研究。依据BOPPPS学习模型和项目式学习方法,从课... 详细信息

立足交通大类下车辆专业的课程体系及培养模式,针对交通强国战略背景下交通大类下车辆专业的培养特色及育人目标,对课程体系进行梳理和重构,在此基础上进行人才培养体系及专业课教学模式研究。依据BOPPPS学习模型和项目式学习方法,从课程体系、项目式课程群、课堂教学活动设计、课程学习评价体系及科教研实践体系等方面,提出进阶式模块化课程体系,以期提升交通强国战略背景下的车辆专业课程育人质量及价值引领效果,对于建设高水平应用研究型大学及一流本科专业具有一定的理论及实践价值。

关键词：交通强国车辆专业人才培养体系

基于领航-跟随法和人工势场法的巡检机器人编队

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国外电子测量技术 2024年第1期43卷 182-188页

作者：吴金霆王琢张子超王乃宇东北林业大学计算机与控制工程学院哈尔滨150036 东北林业大学机电工程学院哈尔滨150036

机器人编队技术正不断发展并逐步投入应用,为了提升巡检机器人的工作效率,提出了一种基于领航-跟随法和人工势场法的编队控制方法,保留了两方法的优点,使机器人编队在躲避障碍物的同时尽可能保持队形,通过施加随机扰动的方法改善人工势... 详细信息

机器人编队技术正不断发展并逐步投入应用,为了提升巡检机器人的工作效率,提出了一种基于领航-跟随法和人工势场法的编队控制方法,保留了两方法的优点,使机器人编队在躲避障碍物的同时尽可能保持队形,通过施加随机扰动的方法改善人工势场法中容易出现的局部最小值问题。实验结果表明,提出的方法完成任务消耗的时间相较于领航-跟随法和基于行为法分别下降了28.5%和41.4%,在执行特定任务如协同围捕和依次排开时采用该方法的编队也能优秀完成。通过ROS(robot operating system)平台进行模拟环境仿真,进一步验证了方法的可行性。

关键词：编队控制巡检机器人领航-跟随法人工势场法