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Journal of the Operations Research Society of China 2023年第3期11卷 439-449页

作者： Geng-Hua Fan Jian-Feng Hou Chui-Xiang Zhou Center for Discrete Mathematics Fuzhou UniversityFuzhou350003FujianChina

Gallai's conjecture asserts that every connected graph on n vertices can be decomposed into at most n+1/2 paths.The E-subgraph of a graph G,denoted by G_(e),is the subgraph induced by the vertices of even degree in G.A triangle pair is a graph consisting of two triangles with exactly one vertex in common.In this paper,it is proved that Gallai's conjecture is true for graphs G in which G_(e)contains no triangle pair and each block of G_(e)has maximum degree at most 3.

关键词： Gallai's conjecture path Triangle Decomposition

Thoughts on strategies and paths to achieve carbon peaking and carbon neutrality in China

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Frontiers in Energy 2023年第3期17卷 324-331页

作者： Xiangwan DU Chinese Academy of Engineering Beijing 100088China

First,a brief introduction is made to the four basic judgments and understandings of the goals of"carbon peaking and carbon neutrality."Then,an in-depth elaboration is provided on the eight major strategies for achieving the goals of"carbon peaking and carbon neutrality,"including conservation and efficiency priority,energy security,non-fossil energy substitution,reelectrification,resource recycling,carbon sequestration,digitalization and cooperation between countries.Next,eight major implementation paths for achieving the goals of"carbon peaking and carbon neutrality"are discussed in detail,including industrial restructuring;building a clean,low-carbon,safe and_efficient energy system,and renewing the understanding of China's energy resource endowment;accelerating the construction of a new-type power system with a gradually growing proportion of new energy,and realizing the"possible triangle"of highquality energy system development;utilizing electrification and deep decarbonization technologies to promote the orderly peaking and gradual neutralization of carbon emissions in the industrial sector;promoting the lowcarbon transition of transportation vehicles to achieve carbon peaking and carbon neutrality in the transportation sector;focusing on breaking through key green building technologies to achieve zero carbon emissions from building electricity and heat;providing a strong technical support for carbon removal to achieve carbon neutrality;accelerating the construction of the integrated planning and assessment mechanism for pollution and carbon reduction,establishing a sound strategy,planning,policy and action system,and optimizing the carbon trading system.Afterwards,it is particularly pointed out that the realization of the goals of"carbon peaking and carbon neutrality"cannot be separated from the support of scitech innovation.Finally,it is stressed that carbon neutrality is not the end,but an important milestone.If viewed from the perspective of future energy,the significance and historical status of the go

关键词： carbon peaking and carbon neutrality strategy implementation path important sci-tech innovation implementation path

Second Powers of Cover Ideals of paths

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Algebra Colloquium 2022年第4期29卷 669-686页

作者： Nursel Erey Ayesha Asloob Qureshi Departmentof Mathematics Gebze Technical University GebzeKocaeli 41400Turkey Faculty of Engineering and Natural Sciences Sabanci University Orta MahalleTuzla 34956IstanbulTurkey

We show that the second power of the cover ideal of a path graph has linear quotients.To prove our result we construct a recursively defined order on the generators of the ideal which yields linear quotients.Our construction has a natural generalization to the larger class of chordal graphs.This generalization allows us to raise some questions that are related to some open problems about powers of cover ideals of chordal graphs.

关键词： cover ideal power of ideals linear quotient path vertex cover

A Drone-Based Blood Donation Approach Using an Ant Colony Optimization Algorithm

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Computer Modeling in Engineering & Sciences 2023年第8期136卷 1917-1930页

作者： Sana Abbas Faraha Ashraf Fahd Jarad Muhammad Shoaib Sardar Imran Siddique School of Mathematics Minhaj UniversityLahore54770Pakistan Department of Mathematics Cankaya UniversityEtimesgutAnkara06790Turkey Department of Medical Research China Medical University HospitalChina Medical UniversityTaichung40402Taiwan Department of Mathematics University of Management and TechnologyLahore54770Pakistan

This article presents an optimized approach of mathematical techniques in themedical domain by manoeuvring the phenomenon of ant colony optimization algorithm(also known as ACO).A complete graph of blood banks and a path that covers all the blood banks without repeating any link is required by applying the Travelling Salesman Problem(often TSP).The wide use promises to accelerate and offers the opportunity to cultivate health care,particularly in remote or unmerited environments by shrinking lab testing reversal times,empowering just-in-time lifesaving medical supply.

关键词： Network ant colony algorithm path complete graph blood banks drones travelling salesman problem

我国职业教育信息化回顾与展望：阶段、特征和路径

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path Analysis of Energy-Saving Technology in Yangtze River Basin Based on Multi-Objective and Multi-Parameter Optimisation

职业技术教育 2024年第5期

作者：郭日发周潜

职业教育信息化是教育信息化发展不可或缺的部分。研究以20世纪90年代以来的职业教育信息化相关文献和政策为基础，通过文本分析与归纳演绎的方法，从阶段、特征和路径等三个维度对我国职业教育信息化的发展历程进行了回顾，并对我国职... 详细信息

职业教育信息化是教育信息化发展不可或缺的部分。研究以20世纪90年代以来的职业教育信息化相关文献和政策为基础，通过文本分析与归纳演绎的方法，从阶段、特征和路径等三个维度对我国职业教育信息化的发展历程进行了回顾，并对我国职业教育信息化的未来发展进行了展望。研究发现：我国职业教育信息化发展分为发展萌芽期、缓慢发展期、极速发展期和创新发展期四个阶段；各阶段特征表现为稳固基础、兼顾平衡、聚焦质量和创新发展；发展路径呈现为路径形成、路径稳定和路径革新。同时从积极落实“新基建”、技术赋能教学方式变革、数据丰富的数字资源、AI赋能“双师型”教师队伍等四个方面对职业教育信息化支撑、保障、夯实和服务人才培养的未来发展进行展望，为我国职业教育信息化发展提出可参考建议。

关键词：职业教育信息化回顾与展望阶段特征路径 vocational education informatization review and prospect stage characteristics path

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Journal of Thermal Science 2019年第6期28卷 1164-1175页

作者： MENG Xiangzhong YU Wei ZHENG Chuyu WANG Di CAO Xinyun Joint International Laboratory of Green Buildings and Built Environments Ministry of EducationChongqing UniversityChongqing 400045China National Centre for International Research of Low-carbon and Green Buildings Ministry of Science and TechnologyChongqing UniversityChongqing 400045China Power China Huadong Engineering Corporation Limited Hangzhou 311122China

The Yangtze River Basin in China is characterised by hot-and cold-humid climates in summer and winter, respectively. Thus, increased demand for heating and cooling energy according to the season, as well as poor indoor thermal comfort, are inevitable. To overcome this problem, this study focused on the influence of passive design and heating, ventilation, and air conditioning equipment performance on the energy performance of residential buildings, and explored potential energy-saving technology paths involving passive design and improved coefficient of performance through a multi-objective and multi-parameter optimisation technique. A large-scale questionnaire survey covering a typical city was first conducted to identify family lifestyle patterns regarding time spent at home, family type, air conditioner use habits, indoor thermal comfort, etc. Then, the actual heating and cooling energy consumption and information of model building were determined for this region. Subsequently, the design parameters of an individual building were simulated using Energyplus to investigate the cooling and heating energy consumption for a typical residential building with an air conditioner. The results indicated an improvement of approximately 30% in energy efficiency through optimisation of the external-wall insulation thickness and the external-window and shading performance, and through use of appropriate ventilation technology. Thus, a multi-objective and multi-parameter optimisation model was developed to achieve comprehensive optimisation of several design parameters. Experimental results showed that comprehensive optimisation could not only reduce cooling and heating energy consumption, but also improve the thermal comfort level achieved with a non-artificial cooling and heating source. Finally, three energy-saving technology paths were formulated to achieve a balance between indoor thermal comfort improvement and the target energy efficiency(20 kWh/(m2?a)). The findings of this study have implications for the future desi

关键词： Yangtze River Basin energy consumption multi-objective and multi-parameter optimisation passive design energy-saving technology path

path integral solution of vibratory energy harvesting systems

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Applied Mathematics and Mechanics(English Edition) 2019年第4期40卷 579-590页

作者： Wenan JIANG Peng SUN Gangling ZHAO Liqun CHEN Department of Engineering Mechanics Jiangsu University of Science and Technology School of Electronic and Electrical Engineering Shangqiu Normal University Department of Mechanics Shanghai University

A transition Fokker-Planck-Kolmogorov(FPK) equation describes the procedure of the probability density evolution whereby the dynamic response and reliability evaluation of mechanical systems could be carried out. The transition FPK equation of vibratory energy harvesting systems is a four-dimensional nonlinear partial differential equation. Therefore, it is often very challenging to obtain an exact probability density. This paper aims to investigate the stochastic response of vibration energy harvesters(VEHs)under the Gaussian white noise excitation. The numerical path integration method is applied to different types of nonlinear VEHs. The probability density function(PDF)from the transition FPK equation of energy harvesting systems is calculated using the path integration method. The path integration process is introduced by using the GaussLegendre integration scheme, and the short-time transition PDF is formulated with the short-time Gaussian approximation. The stationary probability densities of the transition FPK equation for vibratory energy harvesters are determined. The procedure is applied to three different types of nonlinear VEHs under Gaussian white excitations. The approximately numerical outcomes are qualitatively and quantitatively supported by the Monte Carlo simulation(MCS).

关键词： nonlinear energy harvester path integration probability density function(PDF)

path planning in uncertain environment by using firefly algorithm

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Defence Technology（防务技术） 2018年第6期14卷 691-701页

作者： B.K.Patle Anish Pandey A.Jagadeesh D.R.Parhi Department of Mechanical Engineering CVR College of Engineering School of Mechanical Engineering KIIT University Department of Mechanical Engineering Audisankara Group of Institutions Department of Mechanical Engineering NIT Rourkela

Autonomous mobile robot navigation is one of the most emerging areas of research by using swarm intelligence. path planning and obstacle avoidance are most researched current topics like navigational challenges for mobile robot. The paper presents application and implementation of Firefly Algorithm(FA)for Mobile Robot Navigation(MRN) in uncertain environment. The uncertainty is defined over the changing environmental condition from static to dynamic. The attraction of one firefly towards the other firefly due to variation of their brightness is the key concept of the proposed study. The proposed controller efficiently explores the environment and improves the global search in less number of iterations and hence it can be easily implemented for real time obstacle avoidance especially for dynamic environment. It solves the challenges of navigation, minimizes the computational calculations, and avoids random moving of fireflies. The performance of proposed controller is better in terms of path optimality when compared to other intelligent navigational approaches.

关键词： Mobile robot navigation Firefly algorithm path planning Obstacle avoidance

The path and surface marker of SC-b cells

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Science Bulletin 2019年第16期64卷 1122-1124页

作者： Yinglei Li Wei Jiang Department of Biological Repositories Zhongnan HospitalMedical Research Institute School of MedicineHubei Provincial Key Laboratory of Developmentally Originated Disease Wuhan University

Islet transplantation has been demonstrated to be able to cure diabetes caused by the loss of functional pancreatic b cells;however, it is severely limited by the shortage of cadaveric islet donor(1)Human pluripotent stem cell, including embryonic stem cell(ESC) and induced pluripotent stem cell (iPSC), is the most promising source of replaceable functional cells because of the capacity of self-renewal and multiple lineage differentiation, thus b cell differentiation from stem cell attracts much efforts from both academic and industrial communities [2].

关键词： The path surface marker SC-b cells