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On the Strong n-partite Tournaments with Exactly Two Cycles of Length n-1

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Acta Mathematicae Applicatae Sinica 2018年第4期34卷 710-717页

作者： Qiao-ping guo Yu-bao guo sheng-jia li Chun-fang li School of Mathematical Sciences Shanxi University Taiyuan 030006 China Lehrstuhl C fiir Mathematik RWTH Aachen Templergraben 55 52062 Aachen Germany

Gutin and Rafiey（Australas J. Combin. 34（2006）, 17-21） provided an example of an n-partite tournament with exactly n-m ＋ 1 cycles of length of m for any given m with 4 ≤ m ≤ n, and posed the following question. Let 3 ≤ m ≤n and n ≥ 4. Are there strong n-partite tournaments, which are not themselves tournaments, with exactly n-m ＋ 1 cycles of length m for two values of m？ In the same paper,they showed that this question has a negative answer for two values n-1 and n. In this paper, we prove that a strong n-partite tournament with exactly two cycles of length n-1 must contain some given multipartite tournament as subdigraph. As a corollary, we also show that the above question has a negative answer for two values n-1 and any l with 3 ≤ l ≤ n and l ≠n-1.

关键词： nmltipartite tournaments tournaments cycles

Physical modification of polyetheretherketone for orthopedic implants

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Frontiers of Materials Science 2014年第4期8卷 313-324页

作者： Ya-Wei DU li-Nan ZHANG Zeng-Tao HOU Xin YE hong-sheng GU guo-ping yan peng SHANG School of Materials Science and Engineering Wuhan Institute of Technology Wuhan 430073 China Center for Translational Medicine Research and Development Shenzhen Instituies of Advanced Technology Chinese Academy of Sciences Shenzhen 518055 China Department of Spine Surgery Shenzhen Second People's Hospital Shenzhen 518035 China

Polyetheretherketone （PEEK） is regarded as one of the most potential candidates for replacing current implant applications. To obtain good bone-implant interfaces, many modification methods have been developed to enable PEEK and PEEK- based composites from bio-inert to bioactive. Among them, physical methods have aroused significant attention and been widely used to modify PEEK for orthopedic implants. This review summarizes current physical modification techniques of PEEK for orthopedic applications, which include composite strategies, surface coating methods and irradiation treatments. The positive consequences of those modification methods will encourage continuing investigations and stimulate the wide range of applications of PEEK-based implants in orthopedics.

关键词： polyetheretherketone (PEEK) modification bioactivity bone-implantinterface

Saline conducted electric coagulation (SCEC):original experience in experimental hepatectomy

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2012年第3期13卷 186-191页

作者： guo-ping DING li-ping CAO Da-ren liU Ri-sheng QUE Department of General Surgery the Second Affiliated Hospital School of Medicine Zhejiang University Hangzhou 310009 China

Objective: To evaluate the feasibility and superiority of a new coagulating and hemostatic method named "saline conducted electric coagulation (SCEC)". Methods: The peng's multifunction operative dissector (PMOD) was modified to enable saline to effuse persistently out of its nib at a constant speed. In a group of six New Zealand rabbits, two hepatic lobes of each rabbits were resected respectively by SCEC and conventional electric coagulation (EC). The features of SCEC were recorded by photo and compared with conventional EC. After 7 d, the coagulating depth was measured in each residual hepatic lobe. Hepatic tissue was dyed by hematoxylin and eosin (HE) and studied under a microscope. Results: The coagulating depth increased with the continuation of SCEC time. Hepatectomies were performed successfully, no rabbit died in the perioperative period. The incisal surface of SCEC was gray-white with no red bleeding point. There was a thick solidified layer at the margin and a thin red-white intermittent layer between the solidified layer and normal hepatic tissue at the vertical section of SCEC. The mean coagulating depth of SCEC was 1.8 cm vs. 0.3 cm of conventional EC. Pathological examination showed a mild inflammatory reaction by SCEC. Conclusions: SCEC is a feasible and safe method for surgical hemostasis. As a new technique for liver resection, SCEC shows better coagulating effect and milder inflammatory reaction than conventional EC. Our study shows bloodless liver resection can also be performed by SCEC, especially for liver malignant tumor.

关键词： Saline Electric coagulation Hepatectomy Hemostasis Bloodless liver resection

World Federation of Acupuncture-Moxibustion Societies(WFAS)Clinical Practice Guideline on Acupuncture and Moxibustion:Allergic Rhinitis recommendation summaries

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World Journal of Acupuncture-Moxibustion 2024年第3期34卷 179-188页

作者： Shi-hao DU Jing liU sheng CHEN Shan-ze WANG Guan-qun WANG Shuo DU Xiao-long XIE Bi-hui peng Wei guo Chao yanG Ji-ping ZHAO Department of Acupuncture and Moxibustion of Dongzhimen Hospital Beijing University of Chinese MedicineBeijing 100700China Institute of Acupuncture and Moxibustion China Academy of Chinese Medical SciencesBeijing100700China Department of Acupuncture and Moxibustion Guangdong Provincial Hospital of Chinese MedicineGuangzhou 510120China Department of Traditional Chinese Medicine of Shanghai Ninth People's Hospitol Shanghai Jiao Tong University School of MedicineShanghai 20001

Clinical Practice Guideline on Acupuncture and Moxibustion:Allergic Rhinitis was revised and released by the Standards Working Committee of World Federation of Acupuncture-Moxibustion Societies(WFAS)on October 9,*** is the first clinical practice guideline(CPG)on acupuncture and moxibustion for allergic rhinitis approved by an international academic organization,which provides evidence-based recommendations and the practical therapeutic protocols for acupuncture practitioners *** CPG was developed by following Grades of Recommendation,Assessment,Development,and Evaluation(GRADE)methodology,and the principles of the World Health Organization Handbook for Guideline *** members in the guideline development group(GDG)were from different countries,with different professions,and they played a critical role in the development of clinical questions,recommendations,and therapeutic *** are the core of a CPG and the direct answers to clinical questions,due to which this article focuses on the recommendations of this *** recommendations were developed by using the modified Delphi method and the GRADE grid rules,based on the updated systematic reviews of clinical evidence.A total of 15 recommendations for 15 clinical questions were developed in this CPG,including one strong recommendation for intervention based on high-quality evidence,three conditional recommendations for either the intervention or the comparison based on very low quality of evidence,and 11 conditional recommendations for the intervention based on very low quality of evidence.

关键词： Allergic rhinitis Acupuncture Moxibustion Clinical practice guideline(CPG) Clinical questions

microRNA在肌少-骨质疏松症中的作用机制研究进展

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中华骨质疏松和骨矿盐疾病杂志 2024年第1期17卷 88-94页

作者：刘晏东邓强李中锋彭冉东张彦军郭铁峰檀盛许多芳甘肃中医药大学研究生院兰州730000 甘肃省中医院脊柱疾病诊疗中心兰州730050

microRNA在肌、骨代谢疾病中的作用已成为当前研究热点。本文对microRNA在肌少-骨质疏松症中的作用机制研究进行总结。首先,本文介绍microRNA的生物发生过程和基因调控机制。其次,本文分别介绍相关microRNA亚型在骨骼肌和骨骼重建中的... 详细信息

microRNA在肌、骨代谢疾病中的作用已成为当前研究热点。本文对microRNA在肌少-骨质疏松症中的作用机制研究进行总结。首先,本文介绍microRNA的生物发生过程和基因调控机制。其次,本文分别介绍相关microRNA亚型在骨骼肌和骨骼重建中的作用。在microRNA对骨骼肌作用机制方面,归纳了5个方面:(1)调节转录因子MyoD的活化和表达;(2)调节其他肌肉特异性转录因子的表达;(3)影响肌肉细胞的增殖和分化;(4)影响肌肉细胞表型;(5)microRNA的协同作用。并从促进成骨和抑制破骨两方面说明microRNA影响骨重塑的作用机制。还对具有肌骨共生的microRNA进行了总结归纳。最后对相关研究中存在的问题与不足进行总结和展望,对肌少-骨质疏松症的防治具有积极意义。

关键词： microRNA 非编码RNA 肌少-骨质疏松症肌骨代谢作用机制

Evolution of N=20,28,50 shell closures in the 20≤Z≤30 region in deformed relativistic Hartree-Bogoliubov theory in continuum

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Chinese Physics C 2024年第1期48卷 144-153页

作者：郑茹尤孙向向申国防耿立升 School of Physics Beihang UniversityBeijing102206China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China Institut für Kernphysik Institute for Advanced Simulation and Jülich Center for Hadron PhysicsForschungszentrum JülichD-52425 JülichGermany CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China peng Huanwu Collaborative Center for Research and Education Beihang UniversityBeijing 100191China Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 102206China Southern Center for Nuclear-Science Theory(SCNT) Institute of Modern PhysicsChinese Academy of SciencesHuizhou 516000China

Magicity,or shell closure,plays an important role in our understanding of complex nuclear *** this work,we employ one of the state-of-the-art density functional theories,the deformed relativistic Hartree-Bogoliubov theory in continuum(DRHBc)with the density functional PC-PK1,to investigate the evolution of the N=20,28,50 shell closures in the 20≤Z≤30 *** show how these three conventional shell closures evolve from the proton drip line to the neutron drip line by studying the charge radii,two-neutron separation energies,two-neutron gaps,quadrupole deformations,and single-particle *** particular,we find that in the 21≤Z≤27 region,the N=50 shell closure disappears or becomes quenched,mainly due to the deformation ***,both experimental data and theoretical predictions indicate that the N=28 shell closure disappears in the Mn isotopic chain,mainly due to the deformation *** DRHBc theory predicts the existence of the N=20 shell closure in the Ca,Sc,and Ti isotopic chains,but the existing data for the Ti isotopes suggest the contrary,and therefore further research is needed.

关键词： shell evolution covariant density functional theories magic numbers

Numerical simulation of seasonal snow in Tianshan Mountains

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Journal of Mountain Science 2021年第2期18卷 338-356页

作者： ren yan-run ZHANG Yao-nan HAO Jian-sheng SHEN Yong-ping ZHAO guo-hui li Cong Northwest Institute of Eco-Environment and Resources Chinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China National Cryosphere Desert Data Center Lanzhou 730000China Institute of Geographic Sciences and Natural Resources Research Chinese Academy of SciencesBeijing 100101China Lanzhou University of Technology Lanzhou 730050China

Snowfall in the Tianshan Mountains in China is frequent during winter;thus,avalanches have become a severe issue in snow-covered *** and metamorphosis,as well as hydrothermal exchanges with the environment,considerably affect the stability of snow on ***,a hydrothermal model of snow cover and its underlying surfaces must be developed on the basis of meteorological data to predict and help manage *** study adopted the conceptual model of snow as a porous medium and quantitatively analysed its internal physical processes on the basis of the thermal exchanges amongst its *** effects of local meteorological factors on snow structure and the redistribution of energy and mass inside the snow cover in the Tianshan Mountains were *** results showed that deformation as a result of overlying snow and sublimation of snow cover at the bottom is the main cause of density variation in the vertical profile of snow *** drives water movement in *** low-density area of the bottom snow is the result of temperature *** simulation results of the long-term snow internal mass distribution obtained by the method established in this study are highly consistent with the actual observed trend of *** consistency indicates an accurate simulation of the physical characteristics of snow cover in small and microscale metamorphism in the Tianshan Mountains during the stable period.

关键词： Snow Porous medium Heat and mass transfer Phase change Thermo-hydro-mechanical(THM)coupling Numerical modelling

海洋中药中重金属及有害元素质量控制进展及未来发展方向

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中国新药杂志 2024年第9期33卷 877-884页

作者：郭愿生左甜甜陈安珍金红宇李萍马双成中国食品药品检定研究院北京100050 中国药科大学南京211198 青岛市食品药品检验研究院国家药品监督管理局海洋中药质量研究与评价重点实验室青岛260071

海洋中药是我国传统中药文化宝库的重要成员,在应对人类疾病方面发挥着不可替代的作用,然而,近年来随着工业化和城市化的快速发展,海洋环境受到的污染日益严重,尤其是重金属污染,严重威胁人类的生命健康,因此对海洋中药中重金属的检测... 详细信息

海洋中药是我国传统中药文化宝库的重要成员,在应对人类疾病方面发挥着不可替代的作用,然而,近年来随着工业化和城市化的快速发展,海洋环境受到的污染日益严重,尤其是重金属污染,严重威胁人类的生命健康,因此对海洋中药中重金属的检测分析尤为重要。本文从海洋中药的特点出发,通过大量查阅相关文献,对海洋中药中重金属及有害元素的检测技术、分析方法和质量控制展开综述,以期为提高海洋中药中重金属的检测技术和海洋中药的风险评估提供参考。

关键词：海洋中药重金属及有害元素质量控制价态光谱法检测方法

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电动汽车充电站群电能质量协同监测技术

机械设计与制造 2024年第6期400卷 21-25页

作者：李宏胜武光华柳长发郭世萍国网河北省电力有限公司营销服务中心河北石家庄050000

为解决现有电能质量监测技术存在的监测范围小、精度低的问题,优化设计电动汽车充电站群电能质量协同监测技术。根据电动汽车充电站群的组成结构,构建充电站群模型,模拟充电过程。针对电能质量指标配置相应的电能质量监测点,协同采集与... 详细信息

为解决现有电能质量监测技术存在的监测范围小、精度低的问题,优化设计电动汽车充电站群电能质量协同监测技术。根据电动汽车充电站群的组成结构,构建充电站群模型,模拟充电过程。针对电能质量指标配置相应的电能质量监测点,协同采集与处理电动汽车充电站群暂态信号,通过对扰动、谐波/间谐、电压偏差、频率偏差等指标的计算,得出电能质量的协同监测结果。通过与现有监测技术的对比,所设计监测技术的监测范围扩大了1306.24m^(2),且监测误差更低。

关键词：电动汽车充电站充电站群电能电能质量协同监测技术