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Efficient k-dominant skyline query over incomplete data using MapReduce

Frontiers of Computer Science 2021年第4期15卷 151-164页

作者： linlin ding Shu WANG Baoyan SONG School of Information Liaoning UniversityShenyang 110036China

Skyline queries are extensively incorporated in various real-life applications by filtering uninteresting data ***,a skyline query may return so many results because it cannot control the retrieval conditions especially for highdimensional *** an extension of skyline query,the kdominant skyline query reduces the control of the dimension by controlling the value of the parameter k to achieve the purpose of reducing the retrieval *** addition,with the continuous promotion of Bigdata applications,the data we acquired may not have the entire content that people wanted for some practically reasons of delivery failure,no power of battery,accidental loss,so that the data might be incomplete with missing values in some ***,the k-dominant skyline query algorithms of incomplete data depend on the user definition in some degree and the results cannot be ***,the existing algorithms are unsuitable for directly used to the incomplete big *** on the above situations,this paper mainly studies k-dominant skyline query problem over incomplete dataset and combines this problem with the distributed structure like MapReduce ***,we propose an index structure over incomplete data,named incomplete data index based on dominate hierarchical tree(ID-DHT).Applying the bucket strategy,the incomplete data is divided into different buckets according to the dimensions of missing ***,we also put forward query algorithm for incomplete data in MapReduce environment,named MapReduce incomplete data based on dominant hierarchical tree algorithm(MR-ID-DHTA).The data in the bucket is allocated to the subspace according to the dominant condition by Map *** function controls the data according to the key value and returns the k-dominant skyline query *** effective experiments demonstrate the validity and usability of our index structure and the algorithm.

关键词： k-dominant skyline query incomplete data MapReduce index structure big data

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Urban Land Use Efficiency and Contributing Factors in the Yangtze River Delta Under Increasing Environmental Restrictions in China

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Chinese Geographical Science 2022年第5期32卷 883-895页

作者： YANG Qingke WANG Lei QIN Xianhong FAN Yeting WANG Yazhu ding linlin School of Public Administration Nanjing University of Finance&EconomicsNanjing 210023China Key Laboratory of Coastal Zone Exploitation and Protection Ministry of Natural ResourcesNanjing 210017China Key Laboratory of Watershed Geographic Sciences Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China School of Public Administration Hohai UniversityNanjing 211100China Institute of Population Sciences Hohai UniversityNanjing 211100China

Evaluating urban land use efficiency(ULUE) provides insights into the interactions between land use systems and their external environment. Specifically, changes in ULUE are important for monitoring urban transformation in developing countries. In this study, using a traditional input-output index model, we incorporated slack-based measurements and undesirable outputs into a SBM-UN(slack-based measure-undesirable) model to investigate ULUE within the context of increasing environmental restrictions in China. The model was used to estimate the ULUE of 26 cities in the highly developed urban agglomeration of the Yangtze River Delta from 2000 to2018. The average ULUE in the Yangtze River Delta was relatively low compared to that of developed city regions in the European Union(EU) and North America and exhibited a U-shaped curve over the study period. Incorporating undesirable outputs, such as environmental pollution, into the model reduced ULUE by 19.06%. ULUE varied spatially, with the kernel density estimation exhibiting a bimodal distribution. Efficiency decomposition analysis showed that scale efficiency made a greater contribution to ULUE than pure technical efficiency. Based on our findings, recommended approaches to improve ULUE include optimizing factor allocation, reducing undesirable outputs, and increasing the effective output per land unit. The study suggests that ULUE and the SBM-UN model are useful planning tools for sustainable urban development.

关键词： urban land use efficiency(ULUE) environmental restriction efficiency decomposition kernel density estimation SBM-UN(slack-based measure-undesirable)model Yangtze River Delta China

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Developing an evaluation model to support evidence-based decision-making on provincial vaccination program of Zhejiang province

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Asian Pacific Journal of Tropical Medicine 2023年第12期16卷 527-532页

作者： Fuxing Chen linlin ding Hui Liang Ying Wang Yu Hu Institute of Immunization and Prevention Zhejiang Center for Disease Control and PreventionHangzhouChina

Vaccines are considered as one of the most cost-effective interventions to improve the global public health by reducing mortality and morbidity[1].At an ever-increasing pace,new vaccines are being developed and licensed in China,driven by initiatives from both domestic and international vaccine *** vaccines are evaluated by Chinese Advisory Committee on Immunization,which makes decisions regarding the use of vaccines based on the epidemiological context in China.

关键词： companies China provincial

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Influence Mechanism of New-type Urbanization on Urban Land Use Efficiency in the Yangtze River Delta, China

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Chinese Geographical Science 2023年第3期33卷 474-488页

作者： YANG Qingke ding linlin WANG Lei LIU Chao FAN Yeting LI Ying WANG Yazhu School of Public Administration Nanjing University of Finance&EconomicsNanjing 210023China Key Laboratory of Coastal Zone Exploitation and Protection Ministry of Natural ResourcesNanjing 210017China Key Laboratory of Watershed Geographic Sciences Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China Faculty of Political Science College of Public AdministrationCentral China Normal UniversityWuhan 430079China

Rapid urbanization in China has led to inefficient use of urban land and spatial structure disorder,attracting attention from academia and *** the Yangtze River Delta,China as an example,this study constructed an index evaluation system that quantitatively analyses the impact of new-type urbanization(NTU)on urban land use efficiency(ULUE)from 2000 to 2020 using a panel data vector autoregressive *** results show that NTU in the Yangtze River Delta promotes ULUE ***,the promotion of NTU to ULUE is limited,and the level of urban economic development also plays a role in promoting the change of ***,the study further analyzed the results of urbanization decomposition and found that population urbanization(PU),economic urbanization(EU),spatial urbanization(SU),and social urbanization(SCU)can explain changes in ULUE in the Yangtze River Delta to a certain *** terms of variance decomposition,PU contributed the most to ULUE,followed by EU,SU,and *** necessary measures should be taken to coordinate the development of different types of urbanization,improve the sustainable utilization level of land resources,and provide a reference for high-quality development in the Yangtze River Delta.

关键词： Urbanization Yangtze Delta

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Airship Pitch Control with Composite Nonlinear Feedback

Airship Pitch Control with Composite Nonlinear Feedback

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第三十九届中国控制会议

作者： linlin ding Weiyao Lan Zhibin Li Department of Automation Xiamen University College of Electrical Engineering and Automation Shandong University of Science and Technology

This paper illustrates the design of composite nonlinear feedback controller for pitch control of an airship. Based on a linearized longitudinal motion model, a composite nonlinear feedback control law is constructed to improve the transient performance of the closed-loop system. To illustrate the improvement of the transient performance, the composite nonlinear feedback control law is compared with the PID control laws in the literature by considering the performance on both disturbance rejection and tracking. The simulation comparison shows that the composite nonlinear feedback controller can improve the transient performance significantly by carefully designing the linear feedback part and the nonlinear function in the control law.

关键词： Pitch Control Transient Performance Composite Nonlinear Feedback Disturbance Rejection

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Efficient Processing of Multi-way Joins Using MapReduce

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国际计算机前沿大会会议论文集 2015年第1期 23-24页

作者： linlin ding Siping Liu Yu Liu Aili Liu Baoyan Song School of Information Liaoning UniversityShenyang LiaoningP.R. China

Multi-way join is critical for many big data applications such as data mining and knowledge discovery. Even though lots of research have been devoted to processing multi-way joins using MapReduce, there are still several problems in general to be further improved, such as transferring numerous unpromising intermediate data and lacking of better coordination mechanisms. This work proposes an efficient multi-way joins processing model using MapReduce, named Sharing-Coordination-MapReduce (SC-MapReduce), which has the functions of sharing and coordination. Our SC-MapReduce model can filter the unpromising intermediatedata largely by using the sharing mechanism and optimize the multiple tasks coordination of multi-way joins. Extensive experiments show that the proposed model is efficient, robust and scalable.

关键词： MapReduce multi-way joins sharing and coordination

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环境约束下中国工业用地投入对经济增长的影响——基于“绿色索洛模型”的分析

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资源科学 2017年第4期39卷 620-628页

作者：丁琳琳吴群南京农业大学公共管理学院南京210095 南京农业大学土地价格与市场研究室南京210095

工业生产促进经济增长的过程内含"环境代价",一定程度上造成了经济损失。本文在理论上构建了包含土地和环境要素在内的"绿色索洛模型",考察工业用地投入和环境污染对经济增长的影响与约束,以消除工业经济增长中的环境代价。并利用中国20... 详细信息

工业生产促进经济增长的过程内含"环境代价",一定程度上造成了经济损失。本文在理论上构建了包含土地和环境要素在内的"绿色索洛模型",考察工业用地投入和环境污染对经济增长的影响与约束,以消除工业经济增长中的环境代价。并利用中国2000-2010年省际面板数据进行实证检验。研究结果表明:①环境约束下,索洛模型仍存在平衡增长路径;②土地要素对经济增长呈正向作用,但地区间存在差异,其中中部地区影响最大,东部地区次之,西部地区最小;③环境要素对经济增长的影响取决于正/负效应共同的作用结果,总体来看,除工业固体废弃物外,工业废水、工业SO_2、工业NO_X、工业烟(粉)尘等的排放对经济增长均呈明显抑制作用,且工业废气对经济增长的抑制作用较工业废水更强。在未来经济发展中,应摒弃传统的"低成本"工业化模式,积极探索建立绿色国民经济核算体系;同时加快用地企业科技创新,尤其是环境保护和污染治理方面的科技创新,减少工业用地投产过程中的环境外部性。

关键词：工业用地投入环境污染经济增长绿色索洛模型中国

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TBSN:一种基于分类层次的P2P网络

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计算机研究与发展 2008年第5期45卷 803-809页

作者：乔百友王国仁丁琳琳东北大学信息科学与工程学院沈阳110004

构建语义覆盖网络是支持基于语义的搜索、提高P2P网络查找性能和可扩展性的重要手段.现有的基于分类层次的P2P语义覆盖网络并不能充分利用分类层次所包含的语义信息,为此提出了一种基于分类层次的P2P网络(TBSN),该网络充分考虑遵循某种... 详细信息

构建语义覆盖网络是支持基于语义的搜索、提高P2P网络查找性能和可扩展性的重要手段.现有的基于分类层次的P2P语义覆盖网络并不能充分利用分类层次所包含的语义信息,为此提出了一种基于分类层次的P2P网络(TBSN),该网络充分考虑遵循某种分类层次的数据源的特点,能够利用分类层次所包含的语义信息,动态地将peer节点聚簇成不同的语义簇,语义簇之间根据语义关系建立相应的语义路由,从而形成了一种基于语义的P2P网络.每个语义簇由一个super-peer节点和多个peer节点组成,仅负责回答其语义子空间上的查询.查询根据语义首先被路由到可能有结果的语义簇中,然后转发给相关的peer节点,从而减少查询所涉及的节点和消息的数量,提高了网络的性能.实验表明,TBSN网络在查找性能和开销之间取得了良好的平衡,同时较好地保持了语义簇之间的负载平衡和簇中数据之间的语义关系.

关键词： P2P 语义分簇分类层次负载平衡语义路由

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Carbon dots self-assembly enables near-infrared emission

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Science China Chemistry 2025年

作者： Shurong ding Shasha Liu Yuzhuo Yang linlin Shi Yongqiang Zhang Jingkun Yu Haoqiang Song Yingge Shi Siyu Lu College of Chemistry Pingyuan Laboratory Zhengzhou University Henan Institute of Advanced Technology Zhengzhou University

In the fields of biomedicine, detection, and anti-counterfeiting, there is a widespread demand for cost-effective, easily synthesized, and environmentally friendly near-infrared(NIR) materials. Carbon dots(CDs), a cheap and non-toxic zero-dimensional carbon nanomaterial exhibiting exceptional photoluminescence(PL) properties and facile structural modification, have emerged as a promising candidate for the development of novel NIR materials. This study presents the synthesis of CDs capable of emitting a wide range of wavelengths from blue to NIR(456–836 nm) as their concentrations increase. The incorporation of oxygen and nitrogen co-doped atoms facilitates the optimization of non-coplanar angles, thereby promoting favorable π-πstacking interactions. This leads to the formation of metal-free rigid clusters through interconnecting adjacent nanoparticles in a gear-like meshing pattern through self-assembly. Consequently, intramolecular motion is constrained, vibration coupling is mitigated, non-radiative transition losses are minimized, and efficient NIR emission from CD clusters in high concentrations is ensured. Furthermore, NIR light-emitting diode(NIR LED) based on the CD clusters was successfully fabricated and employed for various applications including information encryption, anti-counterfeiting, and penetration detection in the field of NIR imaging.

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农村土地确权羁绊及对策：赣省调查

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改革 2015年第3期 56-64页

作者：丁琳琳孟庆国清华大学中国农村研究院北京100084 清华大学公共管理学院北京100084

以试行"三权三证"的江西省南昌县为例研究农村土地确权困境及对策,结果表明:尽管南昌县农村土地确权基础较好,但仍然存在土地权属存争议,农民、村干部兴趣不高,乡镇干部认识不统一,县、乡政府确权资金有压力,工作人员不足,操作层面有难... 详细信息

以试行"三权三证"的江西省南昌县为例研究农村土地确权困境及对策,结果表明:尽管南昌县农村土地确权基础较好,但仍然存在土地权属存争议,农民、村干部兴趣不高,乡镇干部认识不统一,县、乡政府确权资金有压力,工作人员不足,操作层面有难题等诸多问题。建议从加强政策宣传、灵活用人机制、增加资金支持、提高土地纠纷处理能力、完善相关法律法规等方面推进土地确权。

关键词：农村土地确权江西土地市场 “三农”问题

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