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Big Data Oriented Novel Background Subtraction Algorithm for Urban Surveillance Systems

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Big Data Mining and Analytics 2018年第2期1卷 137-145页

作者： Ling Hu qiang ni Feng Yuan the School of Computing and Communications Lancaster University the Chinese Academy of Sciences Smart City Software Co. Ltd. Institute of Software Application Technology Guangzhou & Chinese Academy of Sciences

Due to the tremendous volume of data generated by urban surveillance systems, big data oriented lowcomplexity automatic background subtraction techniques are in great demand. In this paper, we propose a novel automatic background subtraction algorithm for urban surveillance systems in which the computer can automatically renew an image as the new background image when no object is detected. This method is both simple and robust with respect to changes in light conditions.

关键词： big data background subtraction urban surveillance systems

Combined Cloud： A Mixture of Voluntary Cloud and Reserved Instance Marketplace

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Journal of Computer Science & Technology 2016年第6期31卷 1110-1123页

作者： Wei Shen Wan-Chun Dou Fan Wu Shaojie Tang qiang ni State Key Laboratory for Novel Software Technology Nanjing University Nanjing 210046 China Department of Computer Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China Department of Information Systems University of Texas at Dallas Texas TX 75080 U.S.A. School of Computing and Communications Lancaster University Lancaster LA1 4WA U.K.

Voluntary cloud is a new paradigm of cloud computing. It provides an alternative selection along with some well-provisioned clouds. However, for the uncertain time span that participants share their computing resources in voluntary cloud, there are some challenging issues, i.e., fluctuation, under-capacity and low-benefit. In this paper, an architecture is first proposed based on Bittorrent protocol. In this architecture, resources could be reserved or requested from Reserved Instance Marketplace and could be accessed with a lower price in a short circle. Actually, these resources could replenish the inadequate resource pool and relieve the fluctuation and under-capacity issue in voluntary cloud. Then, the fault rate of each node is used to evaluate the uncertainty of its sharing time. By leveraging a linear prediction model, it is enabled by a distribution function which is used for evaluating the computing capacity of the system. Moreover, the cost optimization problem is investigated and a computational method is presented to solve the low-benefit issue in voluntary cloud. At last, the system performance is validated by two sets of simulations. And the experimental results show the effectiveness of our computational method for resource reservation optimization.

关键词： voluntary cloud system architecture resource reservation

Application of SSOR-PCGM with improved iteration format in FEM simulation of massive concrete

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Water Science and Engineering 2011年第3期4卷 317-328页

作者： Lin HAN Zi-ming ZHANG Zhi-qiang ni College of Mechanics and Materials Hohai University Nanjing 210098 P. R. China

In this study, for the purpose of improving the efficiency and accuracy of numerical simulation of massive concrete, the symmetric successive over relaxation-preconditioned conjugate gradient method （SSOR-PCGM） with an improved iteration format was derived and applied to solution of large sparse symmetric positive definite linear equations in the computational process of the finite element analysis. A three-dimensional simulation program for massive concrete was developed based on SSOR-PCGM with an improved iteration format. Then, the programs based on the direct method and SSOR-PCGM with an improved iteration format were used for computation of the Guandi roller compacted concrete （RCC） gravity dam and an elastic cube under free expansion. The comparison and analysis of the computational results show that SSOR-PCGM with the improved iteration format occupies much less physical memory and can solve larger-scale problems with much less computing time and flexible control of accuracy.

关键词： massive concrete symmetric successive over relaxation-preconditioned conjugate gradient method (SSOR-PCGM) improved iteration Jbrmat .finite element method (FEM) numerical simulation

Development of sterically hindered SPOs and enantioselective ni-Al bimetallic catalyzed C-H cyclization of 4-oxoquinazolines with tethered alkenes

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Chinese Chemical Letters 2023年第6期34卷 366-370页

作者： Yaqi Zhang qiang ni Bendu Pan Long Jiang Liqin Qiu School of Chemistry Guangdong Key Lab of Chiral Molecules and Drug DiscoverySun Yat-sen UniversityGuangzhou 510006China Instrumental Analysis and Research Centre Sun Yat-sen UniversityGuangzhou 510275China

The ni-Al bimetallic catalysis of intramolecular enantioselective and regioselective C-H cyclization of4-oxoquinazolines with tethered alkenes has been successfully *** new secondary phosphine oxides(SPOs)with large steric hindrance(SPO6-11)were designed and successfully synthesized from readily available chiral amines or amino *** developed chiral SPOs as ligands or preligands demonstrate much higher efficiency in the asymmetric catalytic reactions than the reported traditional ones.A new class of chiral tricyclic pyrroloquinazolinones were obtained in up to 95%yield and 99%ee.

关键词： ni-Al bimetallic catalysis Secondary phosphine oxides C-H cyclization Asymmetric catalysis 4-Oxoquinazolines

Artificial Intelligence-Based Image Reconstruction for Computed Tomography: A Survey

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Intelligent Automation & Soft Computing 2023年第6期36卷 2545-2558页

作者： Quan Yan Yunfan Ye Jing Xia Zhiping Cai Zhilin Wang qiang ni College of Computer National University of Defense TechnologyChangsha410073China Technical Service Center for Vocational Education National University of Defense TechnologyChangsha410073China School of Computing and Communications Lancaster UniversityLancasterLA14WAUK

Computed tomography has made significant advances since its intro-duction in the early 1970s,where researchers have mainly focused on the quality of image reconstruction in the early ***,radiation exposure poses a health risk,prompting the demand of the lowest possible dose when carrying out CT *** acquire high-quality reconstruction images with low dose radiation,CT reconstruction techniques have evolved from conventional reconstruction such as analytical and iterative reconstruction,to reconstruction methods based on artificial intelligence(AI).All these efforts are devoted to con-structing high-quality images using only low doses with fast reconstruction *** particular,conventional reconstruction methods usually optimize one aspect,while AI-based reconstruction has finally managed to attain all goals in one ***,there are limitations such as the requirements on large datasets,unstable performance,and weak generalizability in AI-based reconstruction *** work presents the review and discussion on the classification,the commercial use,the advantages,and the limitations of AI-based image reconstruction methods in CT.

关键词： Computed tomography image reconstruction artificial intelligence

Rough Sets Probabilistic Data Association Algorithm and its Application in Multi-target Tracking

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Defence Technology（防务技术） 2013年第4期9卷 208-216页

作者： Long-qiang ni She-sheng GAO Peng-cheng FENG Kai ZHAO Department of Automatic Control Northwestern Polytechnical University Northwest Institute of Mechanical & Electrical Engineering

A rough set probabilistic data association(RS-PDA)algorithm is proposed for reducing the complexity and time consumption of data association and enhancing the accuracy of tracking results in multi-target tracking *** this new algorithm,the measurements lying in the intersection of two or more validation regions are allocated to the corresponding targets through rough set theory,and the multi-target tracking problem is transformed into a single target tracking after the classification of measurements lying in the intersection *** typical multi-target tracking applications are *** simulation results show that the algorithm can not only reduce the complexity and time consumption but also enhance the accuracy and stability of the tracking results.

关键词：数据关联算法多目标跟踪粗糙集理论应用概率时间消耗问题转化仿真结果

Research on typical problems and the development strategies of the institutional pension

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International English Education Research 2016年第12期 57-59页

作者： ni qiang School of Management Shanghai University of Engineering Science Shanghai 201620 China

As an important support of socialized pension service system, institutional pension plays an important role in satisfying the needs of the elderly. Based on the analysis of the present situation and the typical problems of the development of the institutional pension service in Shanghai in recent years, the paper puts forward the pertinent suggestions from the aspects of the allocation of the aged resources, the transformation of the government functions, the standardization of the old-age service, the talent incentive and the medical reimbursement.

关键词： Institutional Pension Typical Problems The development Strategies

Research on spirit and culture of the elderly life under the multiple responsibility

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International English Education Research 2015年第5期 75-77页

作者： ni qiang School of Management Shanghai University of Engineering and Science Shanghai 201620 China

With the transformation of population age structure and the extension of life expectancy, China has entered a rapid aging period. With development of social economy and the social security systcn~ the elderly spiritual and cultural needs is becoming more and more importantly. To the government, enterprise, society community, family and themselves, enriching the spirit and culture of the elderly life is a higher level of challenge.

关键词： multiple responsibilities the elderly , spiritual and cultural life, research

基于震害的钢筋混凝土框架结构倒塌机理的集成多媒体仿真研究

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建筑结构学报 2000年第2期21卷 52-58页

作者：倪强唐家祥华中理工大学湖北武汉430074

本文在总结历次实际地震震害特点的基础上，针对钢筋混凝土框架结构的特点，运用面向对象的建模理论建立了一套能模拟房屋倒塌过程的计算机模型，结合钢筋混凝土框架三维非线性动力有限元方法，给出了一种计算机能自动判断局部或整体可... 详细信息

本文在总结历次实际地震震害特点的基础上，针对钢筋混凝土框架结构的特点，运用面向对象的建模理论建立了一套能模拟房屋倒塌过程的计算机模型，结合钢筋混凝土框架三维非线性动力有限元方法，给出了一种计算机能自动判断局部或整体可动机构的快速算法，并引入可视化技术及多媒体系统集成原理，开发了框架倒塌仿真的集成多媒体仿真系统，对钢筋混凝土框架结构房屋的倒塌机理作了研究，仿真实例表明该系统能较好地再现框架的倒塌过程。

关键词：钢筋混凝土框架倒塌多媒体系统集成仿真