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Chamber Structure for Some Equivariant Relative Gromov–Witten Invariants of P^1 in Genus 0

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Acta Mathematica Sinica,English Series 2018年第9期34卷 1345-1370页

作者： long Ting WU Beijing International Center for Mathematical Research Peking University

In this paper, we study genus 0 equivariant relative Gromov Witten invariants of P1 whose corresponding relative stable maps are totally ramified over one point. For fixed number of marked points, we show that such invariants are piecewise polynomials in some parameter space. The parameter space can then be divided into polynomial domains, called chambers. We determine the difference of polynomials between two neighbouring chambers. In some special chamber, which we called the totally nega.ive chamber, we show that such a polynomial can be expressed in a simple way. The chamber structure here shares some similarities to that of double Hurwitz numbers.

关键词： Chamber structure equivariant relative Gromov-Witten invariants relative virtual localization formula

Axial coordination regulation of MOF-based single-atom Ni catalysts by halogen atoms for enhanced CO_(2) electroreduction

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Nano Research 2022年第12期15卷 10063-10069页

作者： Jia-Xin Peng Weijie Yang Zhenhe Jia long Jiao Hai-long Jiang Department of Chemistry University of Science and Technology of ChinaHefei230026China Department of Power Engineering School of EnergyPower and Mechanical EngineeringNorth China Electric Power UniversityBaoding071003China

Single-atom catalysts(SACs),with the utmost atom utilization,have attracted extensive interests for various catalytic *** coordination environment of SACs has been recognized to play a vital role in catalysis while their precise regulation at atomic level remains an immense ***,a post metal halide modification(PMHM)strategy has been developed to construct Ni-N4 sites with axially coordinated halogen atoms,named Ni1-N-C(X)(X=CI,Br,and I),on pre-synthetic nitrogen-doped carbon derived from metal-orga.ic *** axial halogen atoms with distinct electronega.ivity can break the symmetric charge distribution of planar Ni-N4 sites and regulate the electronic states of central Ni atoms in Ni1-N-C(X)(X=Cl,Br,and I).Significantly,the Ni1-N-C(CI)catalyst,decorated with the most electronega.ive Cl atoms,exhibits Faradaic efficiency of CO up to 94.7%in electrocatalytic CO_(2) reduction,outperforming Ni1-N-C(Br)and Ni1-N-C(I)***,Ni1-N-C(CI)also presents superb performance in Zn-CO_(2) battery with ultrahigh CO selectivity and great *** calculations reveal that the axially coordinated Cl atom remarkably facilitates*COOH intermediate formation on single-atom Ni sites,thereby boosting the CO_(2) reduction performance of Ni1-N-C(CI).This work offers a facile strategy to tailor the axial coordination environments of SACs at atomic level and manifests the crucial role of axial coordination microenvironments in catalysis.

关键词： metal-orga.ic frameworks single-atom catalysts CO_(2)electroreduction axial coordination environment

Editorial:Driving into Future with Reliable,Secure,Efficient and Intelligent MetaVehicles

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IEEE/CAA Journal of Automatica Sinica 2023年第6期10卷 1355-1356页

作者： Qing-long Han School of Science Computing and Engineering TechnologiesSwinburne University of TechnologyMelbourneVIC 3122Australia

Welcome to the sixth issue of the IEEE/CAA Journal of Automatica Sinica(JAS)in 2023!In the first issue in 2023,I briefly discussed about MetaVehicles,a technological expression of intelligent vehicles,robotics,AI,blockchain,knowledge automation,networking and communication[1].As the concept of the Metaverse continues to evolve and expand,the range of vehicle entities is diversely enlarged,including passenger vehicles,heavy duty vehicles,rail vehicles,marine vehicles,aerial vehicles,and other types of *** development and use of MetaVehicles are likely to become more ***,from a systems and control perspective,new methods of control,estimation and optimization should be developed to achieve the improved vehicular control system stability and reliability in the physical space.

关键词： estimation likely evolve

Editorial:The Era of Quality and Metaverse

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IEEE/CAA Journal of Automatica Sinica 2023年第1期10卷 1-2页

作者： Qing-long Han IEEE the School of Science Computing and Engineering TechnologiesSwinburne University of TechnologyMelbourneVIC 3122Australia

First of all, I would like to take this opportunity to express my sincere thanks to Professor Fei-Yue Wang, the founding Editor-in-Chief, and Professor MengChu Zhou, the former Editor-in-Chief, for their trust in me to take over the role of Editor-in-Chief, IEEE/CAA Journal of Automatica Sinica(JAS) [1], [2]. One can see clearly that under their wonderful leadership, IEEE/CAA JAS has become a young and highimpact publication in the world.

关键词： founding wonderful leadership

long-term follow-up of HER2 overexpression in patients with rectal cancer after preoperative radiotherapy:A prospective cohort study

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World Journal of ga.trointestinal Oncology 2022年第10期14卷 2048-2060页

作者： Nan Chen Chang-long Li Yi-Fan Peng Yun-Feng Yao Department of ga.trointestinal Surgery WardⅢKey laboratory of Carcinogenesis and Translational Research(Ministry of Education/Beijing)Peking University Cancer Hospital and InstituteBeijing 100142China

BACKGROUND The role of HER2 overexpression in rectal cancer is *** To assess the role of HER2 overexpression in the long-term prognosis of rectal *** Data from patients with locally advanced rectal cancer who underwent total mesorectal excision after short-course radiotherapy at Beijing Cancer Hospital between May 2002 and October 2005 were collected.A total of 151 tissue samples of rectal cancer were obtained using rigid proctoscopy before neoadjuvant radiotherapy,followed by immunohistochemistry and fluorescence in situ hybridisation to determine the patients’HER2 expression *** and multivariate analyses of the associations between the clinicopathological factors and HER2 status were *** was estimated and compared using the Kaplan-Meier method based on HER2 expression status,and the differences between groups were verified using the log-rank *** A total of 151 patients were enrolled in this study.A total of 27(17.9%)patients were ultimately confirmed to be *** follow-up duration ranged from 9 mo to 210 mo,with a median of 134 *** metastasis and local recurrence occurred in 60(39.7%)and 24(15.9%)patients,***2 positivity was significantly associated with the pre-treatment lymph node stage(pre-N)(P=0.040),while there were no differences between HER2 status and age,sex,preoperative CEA levels(pre-CEA),T stage,and lympho-vascular *** terms of prognosis,HER2 overexpression was correlated with distant meta stasis(P=0.002)rather than local recurrence(P>0.05).The multivariate analysis demonstrated that elevated pre-CEA[P=0.002,odds ratio(OR)=3.277,97.5%confidence interval(CI):1.543-7.163],post N(+)(P=0.022,OR=2.437,97.5%CI:1.143-5.308)and HER2(+)(P=0.003,OR=4.222,97.5%CI:1.667-11.409)were risk factors for distant *** survival analysis showed that there were significant differences between rectal cancer patients in terms of disease-free survival(DFS)[hazard ra

关键词： HER2 Rectal cancer Distant metastasis Local recurrence Survival

General Quantum Interference Principle and Duality Computer

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Communications in Theoretical Physics 2006年第5期45卷 825-844页

作者： long Gui-Lu Key Laboratory for Quantum Information and Measurements and Department of Physics Tsinghua University Beijing100084 China Key Laboratory of Atomic and Molecular Nanosciences Tsinghua University Beijing 100084 China

In this article, we propose a general principle of quantum interference for quantum system, and based on this we propose a new type of computing machine, the duality computer, that may outperform in principle both classical computer and the quantum computer. According to the general principle of quantum interference, the very essence of quantum interference is the interference of the sub-waves of the quantum system itself A quantum system considered here can be any quantum system： a single microscopic particle, a composite quantum system such as an atom or a molecule, or a loose collection of a few quantum objects such as two independent photons. In the duality computer, the wave of the duality computer is split into several sub-waves and they pass through different routes, where different computing ga.e operations are performed. These sub-waves are then re-combined to interfere to give the computational results. The quantum computer, however, has only used the particle nature of quantum object. In a duality computer, it may be possible to find a marked item from an unsorted database using only a single query, and all NP-complete problems may have polynomial algorithms. Two proof-of-the-principle designs of the duality computer are presented： the giant molecule scheme and the nonlinear quantum optics scheme. We also propose thought experiment to check the related fundamental issues, the measurement efficiency of a partial wave function.

关键词： quantum interference duality computer NP-complete = P

Interfacing superconducting and atomic qubits via unconventional geometric quantum operations

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Science China(Physics,Mechanics & Astronomy) 2022年第9期65卷 1-2页

作者： Gui-Lu long Department of Physics Tsinghua UniversityBeijing100084China

Interfacing or entanglement between spatially separated quantum systems,such as superconducting qubits,semiconductor quantum dots,atomic qubits,and solid-state color centers,is crucial in quantum networks and distributed quantum computation[1].Significant progress has been made in generating entanglement between spatially separated quantum systems via optical links[2],while remote superconducting chips,whose quantum states are easily spoiled by optical photons,have been entangled via cryogenic microwave links[3].

关键词： quantum superconducting spatially

面向远程内存图数据库的应用感知分离式存储设计

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计算机科学 2025年第1期52卷 151-159页

作者：李纯羽邓龙李永坤许胤龙中国科学技术大学计算机科学与技术学院合肥230026 高性能计算安徽省重点实验室合肥230026

图数据在各种应用中日益普及,其因涵盖多种实体类型和存在丰富的关联关系而备受关注.对于图数据库用户而言,高效的图查询服务是保障系统性能的关键因素.随着数据量增加,单机图数据库很难满足将所有数据存储在内存中的需求,而分布式图数... 详细信息

图数据在各种应用中日益普及,其因涵盖多种实体类型和存在丰富的关联关系而备受关注.对于图数据库用户而言,高效的图查询服务是保障系统性能的关键因素.随着数据量增加,单机图数据库很难满足将所有数据存储在内存中的需求,而分布式图数据库在拓展性和资源利用率方面受到挑战.基于RDMA的远程内存系统的引入为克服这些挑战提供了一种新的选择,通过分离计算和存储资源,实现了更为灵活的内存使用方式.然而,在使用远程内存的情况下如何最大程度地优化图查询性能成为了当前研究的重点问题.文中首先分析了利用操作系统分页机制透明使用远程内存构建图数据库存在的问题,并在应用层次上设计了远程内存图数据库的存储模型.根据不同数据的特点和访问模式,设计了属性图在远程内存中的存储结构,优化了数据布局和访问路径.实验结果表明,在本地内存受限的情况下,与透明使用远程内存相比,应用感知的设计方式的端到端性能最高提升了12倍.

关键词：图查询图数据库图存储远程内存属性图模型

Multi-indicator assessment of water environment in government environmental auditing

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Journal of Environmental Sciences 2007年第4期19卷 494-501页

作者： HE Gui-zhen LU Yong-long MA Hua WANG Xiao-long Research Centre for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China. Graduate University of the Chinese Academy of Sciences Beijing 100039 China

This study focused on a multi-indicator assessment methodology for governmental environmental auditing of water protection programs. The environmental status of Wuli Lake in China was assessed using the global indicators （driver-status-response） developed by the Commission on Sustainable Development, and four additional indicators proposed by the author： water quality, pollution load, aquatic ecosystem status, and lake sediment deposition. Various hydrological, chemical, biological and environmental parameters were used to estimate the values of the indicators for assessment of environmental status of the lake based on time series data sets for twenty years. The indicators proposed can be customized to meeting the needs for particular assessment of water protection programs. This method can be used to evaluate the performance of national environmental protection programs and provide technical support for environmental auditors.

关键词： environmental auditing environmental indicators pollution load lake ecosystem state assessment