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期刊论文 17

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关键词

拓扑关系 2

三维空间 1

中性原子量子计算 1

代数推理 1

光量子计算 1

几何学与拓扑学特征 1

分布式量子计算 1

动力学性质 1

半导体激光器，光泵浦垂直外腔面发射激光器，纳米激光器，拓扑绝缘体激光器 1

囚禁离子量子计算 1

安全域 1

小扰动稳定 1

拓扑方向关系 1

拓扑空间关系 1

拓扑绝缘体；Sb2Te3；光纤激光；被动调Q激光；波长可调谐激光 1

拓扑量子计算 1

方向关系 1

智能制造，离散制造行业，数字化转型、智能化升级，拓扑优化，车间调度，深度学习 1

暂态稳定 1

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Mortarless structures based on topological interlocking

Arcady V. DYSKIN, Elena PASTERNAK, Yuri ESTRIN

《结构与土木工程前沿（英文）》 2012年 第6卷 第2期   页码 188-197 doi: 10.1007/s11709-012-0156-8

摘要： We review the principle of topological interlocking and analyze the properties of the mortarless structures whose design is based on this principle. We concentrate on structures built of osteomorphic blocks – the blocks possessing specially engineered contact surfaces allowing assembling various 2D and 3D structures. These structures are easy to build and can be made demountable. They are flexible, resistant to macroscopic fractures and tolerant to missing blocks. The blocks are kept in place without keys or connectors that are the weakest elements of the conventional interlocking structures. The overall structural integrity of these structures depends on the force imposed by peripheral constraint. The peripheral constraint can be provided in various ways: by an external frame or features of site topography, internal pre-stressed cables/tendons, or self-weight and is a necessary auxiliary element of the structure. The constraining force also determines the degree of delamination developing between the blocks due to bending and thus controls the overall flexibility of the structure thus becoming a new design parameter.

关键词： topological interlocking     fragmented structures     segmented structures     constraint     delamination     bending stiffness    

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三维体目标间拓扑方向关系描述和推理

刘新,李成名,刘文宝

《中国工程科学》 2013年 第15卷 第5期   页码 8-13

摘要：

空间关系描述了地理信息系统（GIS）中实体间的位置、距离、方位、拓扑等的度量。为提高空间关系描述的惟一性和空间关系推理的准确性，将拓扑关系与方向关系集成描述，构建拓扑方向关系的描述表达模型。目标对象与参照物在X、Y、Z 3个坐标轴上投影间的Allen区间关系分别为[R1]、[R2]和[R3]，提出利用Allen区间关系对[(R1,R2,R3)]描述三维拓扑方向区域，用定义法研究拓扑方向关系定性推理，通过一些典型例子说明拓扑方向关系推理过程和结果，推理结果用组合推理表表示。

关键词： 空间关系     拓扑关系     方向关系     拓扑方向关系     三维空间    

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Application of a vertex chain operation algorithm on topological analysis of three-dimensional fractured

Zixin ZHANG, Jia WU, Xin HUANG

《结构与土木工程前沿（英文）》 2017年 第11卷 第2期   页码 187-208 doi: 10.1007/s11709-017-0391-0

摘要： Identifying the morphology of rock blocks is vital to accurate modelling of rock mass structures. This paper applies the concepts of directed edges and vertex chain operations which are typical for block tracing approach to block assembling approach to construct the structure of three-dimensional fractured rock masses. Polygon subtraction and union algorithms that rely merely on vertex chain operation are proposed, which allow a fast and convenient construction of complex faces/loops. Apart from its robustness in dealing with finite discontinuities and complex geometries, the advantages of the current methodology in tackling some challenging issues associated with the morphological analysis of rock blocks are addressed. In particular, the identification of complex blocks with interior voids such as cavity, pit and torus can be readily achieved based on the number and the type of loops. The improved morphology visualization approach can benefit the pre-processing stage when analyzing the stability of rock masses subject to various engineering impacts using the block theory and the discrete element method.

关键词： morphology     block assembling     vertex operation     discontinuities    

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“Charging” the cigarette butt: heteroatomic porous carbon nanosheets with edge-induced topological defects

《化学科学与工程前沿（英文）》 2023年 第17卷 第11期   页码 1755-1764 doi: 10.1007/s11705-023-2318-8

摘要： Owing to the complexity of electron transfer pathways, the sluggish oxygen evolution reaction process is defined as the bottleneck for the practical application of Zn–air batteries. In this effort, metal nanoparticles (Co, Ni, Fe, etc.) encapsulated within nitrogen-doped carbon materials with abundant edge sites were synthesized by one-step pyrolysis treatment using cigarette butts as raw materials, which can drastically accelerate the overall rate of oxygen evolution reaction by facilitating the adsorption of oxygenated intermediates by the edge-induced topological defects. The prepared catalyst of nitrogen-doped carbon porous nanosheets loaded with Co nanoparticles (Co@NC-500) exhibits enhanced catalytic activity toward oxygen evolution reaction, with a low overpotential of 350 mV at the current density of 10 mA·cm–2. Furthermore, the Zn–air battery assembled with Co@NC-500 catalyst demonstrates a desirable performance affording an open-circuit potential of 1.336 V and power density of 33.6 mW·cm–2, indicating considerable practical application potential.

关键词： oxygen evolution reaction     porous carbon nanosheets     Co nanoparticles     edge-induced topological defects     Zn–air batteries    

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Virtual network embedding based on real-time topological attributes

Jian DING,Tao HUANG,Jiang LIU,Yun-jie LIU

《信息与电子工程前沿（英文）》 2015年 第16卷 第2期   页码 109-118 doi: 10.1631/FITEE.1400147

摘要： As a great challenge of network virtualization, virtual network embedding/mapping is increasingly important. It aims to successfully and efficiently assign the nodes and links of a virtual network (VN) onto a shared substrate network. The problem has been proved to be NP-hard and some heuristic algorithms have been proposed. However, most of the algorithms use only the local information of a node, such as CPU capacity and bandwidth, to determine how to map a VN, without considering the topological attributes which may pose significant impact on the performance of the embedding. In this paper, a new embedding algorithm is proposed based on real-time topological attributes. The concept of betweenness centrality in graph theory is borrowed to sort the nodes of VNs, and the nodes of the substrate network are sorted according to the correlation properties between the former selected and unselected nodes. In this way, node mapping and link mapping can be well coupled. A simulator is built to evaluate the performance of the proposed virtual network embedding (VNE) algorithm. The results show that the new algorithm significantly increases the revenue/cost (R/C) ratio and acceptance ratio as well as reduces the runtime.

关键词： Virtual network embedding (VNE)     Real-time topological attributes     Betweenness centrality     Correlation properties     Network virtualization    

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拓扑关系与性质及其在空间推理中的应用

李成名,刘晓丽

《中国工程科学》 2013年 第15卷 第5期   页码 14-19

摘要：

首先根据笔者以前的研究成果，给出了两个空间实体之间完备、唯一的拓扑关系形式化表达，进而论述了它们之间存在的性质。从这些性质出发，得出了相互间空间关系复合的结果。空间推理从广义上而言，是指从已知信息推导未知信息的理论和方法，据其使用的理论基础，可以分为代数推理和逻辑推理，空间复合的结果可以直接用于代数推理，又可以作为前提条件用于逻辑推理。

关键词： 拓扑关系     空间关系复合     空间推理     代数推理     逻辑推理    

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Topological reorganization and functional alteration of distinct genomic components in gallbladder cancer

《医学前沿（英文）》 doi: 10.1007/s11684-023-1008-8

摘要： Altered three-dimensional architecture of chromatin influences various genomic regulators and subsequent gene expression in human cancer. However, knowledge of the topological rearrangement of genomic hierarchical layers in cancer is largely limited. Here, by taking advantage of in situ Hi-C, RNA-sequencing, and chromatin immunoprecipitation sequencing (ChIP-seq), we investigated structural reorganization and functional changes in chromosomal compartments, topologically associated domains (TADs), and CCCTC binding factor (CTCF)-mediated loops in gallbladder cancer (GBC) tissues and cell lines. We observed that the chromosomal compartment A/B switch was correlated with CTCF binding levels and gene expression changes. Increased inter-TAD interactions with weaker TAD boundaries were identified in cancer cell lines relative to normal controls. Furthermore, the chromatin short loops and cancer unique loops associated with chromatin remodeling and epithelial–mesenchymal transition activation were enriched in cancer compared with their control counterparts. Cancer-specific enhancer–promoter loops, which contain multiple transcription factor binding motifs, acted as a central element to regulate aberrant gene expression. Depletion of individual enhancers in each loop anchor that connects with promoters led to the inhibition of their corresponding gene expressions. Collectively, our data offer the landscape of hierarchical layers of cancer genome and functional alterations that contribute to the development of GBC.

关键词： 3D genome     cancer     TADs     loop     gene regulation    

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Symptom network topological features predict the effectiveness of herbal treatment for pediatric cough

Mengxue Huang, Jingjing Wang, Runshun Zhang, Zhuying Ni, Xiaoying Liu, Wenwen Liu, Weilian Kong, Yao Chen, Tiantian Huang, Guihua Li, Dan Wei, Jianzhong Liu, Xuezhong Zhou

《医学前沿（英文）》 2020年 第14卷 第3期   页码 357-367 doi: 10.1007/s11684-019-0699-3

摘要： Pediatric cough is a heterogeneous condition in terms of symptoms and the underlying disease mechanisms. Symptom phenotypes hold complicated interactions between each other to form an intricate network structure. This study aims to investigate whether the network structure of pediatric cough symptoms is associated with the prognosis and outcome of patients. A total of 384 cases were derived from the electronic medical records of a highly experienced traditional Chinese medicine (TCM) physician. The data were divided into two groups according to the therapeutic effect, namely, an invalid group (group A with 40 cases of poor efficacy) and a valid group (group B with 344 cases of good efficacy). Several well-established analysis methods, namely, statistical test, correlation analysis, and complex network analysis, were used to analyze the data. This study reports that symptom networks of patients with pediatric cough are related to the effectiveness of treatment: a dense network of symptoms is associated with great difficulty in treatment. Interventions with the most different symptoms in the symptom network may have improved therapeutic effects.

关键词： pediatric cough     complex network     symptoms     traditional Chinese medicine     electronic medical records    

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Conceptual design of compliant mechanisms using level set method

Shi-kui CHEN, Michael Yu WANG

《机械工程前沿（英文）》 2006年 第1卷 第2期   页码 131-145 doi: 10.1007/s11465-006-0018-y

摘要： We propose a level set method-based framework for the conceptual design of compliant mechanisms. In this method, the compliant mechanism design problem is recast as an infinite dimensional optimization problem, where the design variable is the geometric shape of the compliant mechanism and the goal is to find a suitable shape in the admissible design space so that the objective functional can reach a minimum. The geometric shape of the compliant mechanism is represented as the zero level set of a one-higher dimensional level set function, and the dynamic variations of the shape are governed by the Hamilton-Jacobi partial differential equation. The application of level set methods endows the optimization process with the particular quality that topological changes of the boundary, such as merging or splitting, can be handled in a natural fashion. By making a connection between the velocity field in the Hamilton-Jacobi partial differential equation with the shape gradient of the objective functional, we go further to transform the optimization problem into that of finding a steady-state solution of the partial differential equation. Besides the above-mentioned methodological issues, some numerical examples together with prototypes are presented to validate the performance of the method.

关键词： splitting     minimum     dimensional optimization     Hamilton-Jacobi     topological    

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Development of lunar regolith composite and structure via laser-assisted sintering

《机械工程前沿（英文）》 doi: 10.1007/s11465-021-0662-2

摘要： Aiming at the exploration and resource utilization activities on the Moon, in situ resource utilization and in situ manufacturing are proposed to minimize the dependence on the ground transportation supplies. In this paper, a laser-assisted additive manufacturing process is developed to fabricate lunar regolith composites with PA12/SiO2 mixing powders. The process parameters and composite material compositions are optimized in an appropriate range through orthogonal experiments to establish the relationship of process–structure–property for lunar regolith composites. The optimal combination of composite material compositions and process parameters are mixing ratio of 50/50 in volume, laser power of 30 W, scanning speed of 3500 mm/s, and scanning hatch space of 0.2 mm. The maximum tensile strength of lunar regolith composites reaches 9.248 MPa, and the maximum depth of surface variation is 120.79 μm, which indicates poor powder fusion and sintering quality. Thereafter, the mechanical properties of laser-sintered lunar regolith composites are implemented to the topology optimization design of complex structures. The effectiveness and the feasibility of this laser-assisted process are potentially developed for future lightweight design and manufacturing of the solar panel installed on the lunar rover.

关键词： in situ manufacturing     laser-assisted powder fusion process     mechanical properties     topological structure design    

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论GIS空间关系描述中存在的几个基本问题

邓敏,李成名,刘晓丽

《中国工程科学》 2013年 第15卷 第5期   页码 20-24

摘要：

首先剖析了空间关系描述中“空间”的概念，论述了拓扑关系具有与实体位置本身无关的特性，进而阐述了空间实体的拓扑表达，分析了拓扑空间描述存在的不足，以及与地理环境、地理空间认知的相关性，提出了纳入度量特性的拓扑空间关系描述的方法。

关键词： 空间     拓扑空间关系     空间关系描述    

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Novel quantum-inspired firefly algorithm for optimal power quality monitor placement

Ling Ai WONG,Hussain SHAREEF,Azah MOHAMED,Ahmad Asrul IBRAHIM

《能源前沿（英文）》 2014年 第8卷 第2期   页码 254-260 doi: 10.1007/s11708-014-0302-1

摘要： The application of a quantum-inspired firefly algorithm was introduced to obtain optimal power quality monitor placement in a power system. The conventional binary firefly algorithm was modified by using quantum principles to attain a faster convergence rate that can improve system performance and to avoid premature convergence. In the optimization process, a multi-objective function was used with the system observability constraint, which is determined via the topological monitor reach area concept. The multi-objective function comprises three functions: number of required monitors, monitor overlapping index, and sag severity index. The effectiveness of the proposed method was verified by applying the algorithm to an IEEE 118-bus transmission system and by comparing the algorithm with others of its kind.

关键词： quantum-inspired binary firefly algorithm     topological monitor reach area     power quality    

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离散制造行业数字化转型与智能化升级路径研究

李新宇,李昭甫,高亮

《中国工程科学》 2022年 第24卷 第2期   页码 64-74 doi: 10.15302/J-SSCAE-2022.02.008

摘要：

在传统离散制造业加快转型升级的背景下，发展智能制造将推进离散制造业提质增效、促进行业由大变强，因此数字化转型与智能化升级成为必然选择。我国离散制造各细分行业存在极大的差异性，相应的数字化转型与智能化升级路径也存在多样性，因而需要结合企业实际探讨具体实施举措。本文提炼了离散制造行业的典型特性，梳理了离散制造行业数字化转型与智能化升级面临的挑战，阐述了包括先进制造技术、新一代信息技术、新一代人工智能在内的共性关键技术；系统调研了我国离散型制造企业数字化转型与智能化升级的4 个典型案例，力求呈现领域前沿应用进展，进而提出了突破智能制造关键使能技术，研发智能制造装备，建设数字化、智能化车间和工厂，提供数字化、智能化服务，构建标准与安全体系等重点发展任务。研究建议，加快示范应用，突出“中国制造”，培育高新技术人才，制定相应的法律法规，以此推动我国离散制造行业的高质量发展。

关键词： 智能制造，离散制造行业，数字化转型、智能化升级，拓扑优化，车间调度，深度学习    

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几种新体制半导体激光器及相关产业的现状、挑战和思考

韦欣,李明,李健,汪超,李川川

《中国工程科学》 2020年 第22卷 第3期   页码 21-28 doi: 10.15302/J-SSCAE-2020.03.004

摘要：

半导体激光器产业体量大、辐射和带动能力强，作为激光器工业的基础，被广泛应用在光通信、光信息处理、新型加工、激光显示、生物和医学传感等工业、军事和消费生活领域。为了适应逐渐扩大的应用范围，满足不同应用场景所提出的新要求，半导体激光器领域近年来通过学科交叉渗透不断地引入了各种新机制、新概念以及新结构，大大优化了其波长覆盖范围、光束质量、器件体积和功耗、调制速度以及输出功率。本文通过对比几种新型激光器的物理内涵、结构设计及制备手段，介绍了几种应用前景广泛且发展势头强劲的半导体激光器。结合我国相关产业的发展现状指出，半导体激光器产业的发展仍然应与应用紧密结合，通过市场和强大的系统开发能力闭环优化器件性能，提升核心技术，通过交叉学科融通不断引入新概念、新结构和新工艺。同时，结合国内政策导向优势，在垂直外腔面发射激光器、微纳结构激光器以及拓扑绝缘体激光器等几个发展势头强劲的新型激光技术中加大投入，进行批量生产和可控制备研发，力争在国际相关领域的竞争中抢占战术制高点。

关键词： 半导体激光器，光泵浦垂直外腔面发射激光器，纳米激光器，拓扑绝缘体激光器    

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与运行状态无关的电力系统安全域的理论和方法概述 Feature Article

余贻鑫, 刘艳丽, 秦超, 杨添剀

《工程（英文）》 2020年 第6卷 第7期   页码 754-777 doi: 10.1016/j.eng.2019.11.016

摘要：

在电力系统的一系列最优化问题中，如何综合地考虑潮流约束和各种稳定性约束，而又不影响计算速度，始终还是个难题。至于概率安全性评估的计算负担就更加难以想象。为了解决此类问题，本文提出了安全域（SR）的方法论，该方法论是在经典的逐点法基础上发展起来的全新方法论。天津大学自20世纪80年代开始并长期坚持安全域的研究，至今取得了如本文所述的一系列原创成果。本文所介绍的安全域主要是定义在功率注入空间上的，包括确保静态安全、暂态稳定、静态电压稳定和小扰动稳定的安全域。对于既定的网络拓扑（以及暂态事故的发生地点和清除过程）和系统元件参数，它们是唯一确定的，并且与运行状态无关。本文通过11个命题和相应的注释，简明而系统地介绍了这些电力系统安全域的基本概念、构成、动力学性质、拓扑学与几何学特征、实用边界的实用数学描述及其快速计算方法，以期为成体系地认知安全域方法学、开展后续研究与应用提供支持。在拓扑学与几何学特征方面，最重要的发现是，在功率注入空间上，在工程实际所关心的范围内，安全域的边界可用一个或少数几个超平面的并集表示。基于该特征，电力系统安全约束优化问题和概率安全性评估（风险分析）的计算时间可以按数量级减少。

关键词： 安全域     构成     潮流安全     静态电压稳定     小扰动稳定     暂态稳定     动力学性质     几何学与拓扑学特征     超平面    

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标题 作者 时间 类型 操作

Mortarless structures based on topological interlocking

Arcady V. DYSKIN, Elena PASTERNAK, Yuri ESTRIN

期刊论文

三维体目标间拓扑方向关系描述和推理

刘新,李成名,刘文宝

期刊论文

Application of a vertex chain operation algorithm on topological analysis of three-dimensional fractured

Zixin ZHANG, Jia WU, Xin HUANG

期刊论文

“Charging” the cigarette butt: heteroatomic porous carbon nanosheets with edge-induced topological defects

期刊论文

Virtual network embedding based on real-time topological attributes

Jian DING,Tao HUANG,Jiang LIU,Yun-jie LIU

期刊论文

拓扑关系与性质及其在空间推理中的应用

李成名,刘晓丽

期刊论文

Topological reorganization and functional alteration of distinct genomic components in gallbladder cancer

期刊论文

Symptom network topological features predict the effectiveness of herbal treatment for pediatric cough

Mengxue Huang, Jingjing Wang, Runshun Zhang, Zhuying Ni, Xiaoying Liu, Wenwen Liu, Weilian Kong, Yao Chen, Tiantian Huang, Guihua Li, Dan Wei, Jianzhong Liu, Xuezhong Zhou

期刊论文

Conceptual design of compliant mechanisms using level set method

Shi-kui CHEN, Michael Yu WANG

期刊论文

Development of lunar regolith composite and structure via laser-assisted sintering

期刊论文

论GIS空间关系描述中存在的几个基本问题

邓敏,李成名,刘晓丽

期刊论文

Novel quantum-inspired firefly algorithm for optimal power quality monitor placement

Ling Ai WONG,Hussain SHAREEF,Azah MOHAMED,Ahmad Asrul IBRAHIM

期刊论文

离散制造行业数字化转型与智能化升级路径研究

李新宇,李昭甫,高亮

期刊论文

几种新体制半导体激光器及相关产业的现状、挑战和思考

韦欣,李明,李健,汪超,李川川

期刊论文

与运行状态无关的电力系统安全域的理论和方法概述

余贻鑫, 刘艳丽, 秦超, 杨添剀

期刊论文