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Neighbor Sum Distinguishing Total Choice Number of Planar Graphs without 6-cycles

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Acta Mathematica Sinica,English Series 2020年第12期36卷 1417-1428页

作者： dong han zhang You LU Sheng Gui zhang School of Mathematics and Statistics and Xi'an-Budapest Joint Research Center for Combinatorics Northwestern Polytechnical UniversityXi'an 710129P.R.China College of Mathematics and Computer Applications Shangluo UniversityShangluo 726000P.R.China

Pilsniak and Wozniak put forward the concept of neighbor sum distinguishing(NSD)total coloring and conjectured that any graph with maximum degreeΔadmits an NSD total(Δ+3)-coloring in *** 2016,Qu et *** that the list version of the conjecture holds for any planar graph withΔ≥*** this paper,we prove that any planar graph withΔ≥7 but without 6-cycles satisfies the list version of the conjecture.

关键词： Planar graphs neighbor sum distinguishing total choice number Combinatorial Nullstellensatz

Neighbor Sum Distinguishing Total Choosability of Planar Graphs with Maximum Degree at Least 10

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Acta Mathematicae Applicatae Sinica 2024年第1期40卷 211-224页

作者： dong-han zhang You Lu Sheng-gui zhang Li zhang School of Mathematics and Statistics Northwestern Polytechnical UniversityXi’an710129China School of Mathematics and Computer Application Shangluo UniversityShangluo726000China

A neighbor sum distinguishing(NSD)total coloringφof G is a proper total coloring of G such thatΣz∈EG(u)U{u}φ(z)≠Σz∈EG(v)U{v}φ(z)for each edge uv∈E(G),where EG(u)is the set of edges incident with a vertex *** 2015,Pilśniak and Wozniak conjectured that every graph with maximum degreeΔhas an NSD total(Δ+3)-***,Yang et *** that the conjecture holds for planar graphs withΔ≥10,and Qu et *** that the list version of the conjecture also holds for planar graphs withΔ≥*** this paper,we improve their results and prove that the list version of the conjecture holds for planar graphs withΔ≥10.

关键词： planar graphs neighbor sum distinguishing total choosibility combinatorial nullstellensatz discharging method

Synthesis of hexagonal barium ferrite nanoparticle by sol-gel method

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Rare Metals 2006年第z1期25卷 605-608页

作者： dong Limin han Zhidong zhang Yaoming WU Ze zhang Xianyou College of Materials Science and Engineering Harbin University of Science and TechnologyHarbin 150040China

M-type Ba hexaferrites were successfully synthesized by sol-gel *** synthesizing factors,such as pH value,citric acid/metal ion ratio,and dispersion agent were mainly *** and pure powders of BaFe_(12)O_(19)were optimally synthesized under the conditions of the pH value is 7 and citric acid/metal ion ratio is *** X-ray diffraction analysis demonstrates that no impurity is observed in the synthesized powders after presintered at 450℃and calcinated at 1100℃.SEM observations indicate that the size of the synthesized BaFe_(12)O_(19)powders is small and uniform *** can also be learned from SEM that the co-synthesizing sol-gel method can be in favor of the formation of finer particles.

关键词： sol-gel method M-type hexagonal ferrites preparation condition

MICROSTRUCTURE OF RAPIDLY SOLIDIFIED TiAl ALLOY POWDER

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Acta Metallurgica Sinica(English Letters) 1993年第2期6卷 117-120页

作者： CAO Mingzhou han dong zhang Tao LI dong Institute of Metal Research,Academia Sinica,Shenyang,China Associate Professor,Institute of Metal Research,Academia Sinica,Shenyang 110015,China Inst of Metal Research Acad Sinica Shenyang China

The rapidly solidified powder of Ti-34Al-2Mn alloy was obtained by means of ultrasonic gas atomisation (USGA) *** tupical size of the powder is 27 μm.X-ray diffraction results show that the powder consists of major α_2-phase and minor γ-*** optical microscope both equiaxed and dendritical microstructure features were observed on RS pow- der *** annealing at 900 ℃/for 2 h in vacuum,most of α_2-phase transforms into γ-phase,resulting in refinement of structure.

关键词： repid solidification TiAl intermetallic compound microstructure

Common Persistence and Error-Correction Mode in Conditional Variance

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Journal of Systems Science and Systems Engineering 2001年第3期13卷 257-264页

作者： LI han-dong, zhang Shi-ying School of Management, Tianjin University, Tianjin 300072, China School of Management Tianjin University Tianjin 300072 China

We firstly define the persistence and common persistence of vector GARCH process from the point of view of the integration, and then discuss the sufficient and necessary condition of the copersistence in variance. In the end of this paper, we give the properties and the error correction model of vector GARCH process under the condition of the co-persistence.

关键词： vector GARCH process persistence co-persistence

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细长柔性立管涡激振动的数值模拟研究

工程力学 2017年第4期34卷 221-230页

作者：李非凡及春宁许栋韩冰张海天津大学水利安全与仿真国家重点实验室天津300072 天津港东疆建设开发有限公司天津300460 天津市软土特性与工程环境重点实验室天津300384

应用基于浸入边界法(IBM)的三维水动力并行计算程序Cg LES_IBM,并结合隐式结构动力计算程序X-code,研究了低雷诺数条件下细长柔性立管的涡激振动问题。研究发现:立管的振动体现出明显的驻波振动特征。立管在顺流向主要激发奇数阶模态,... 详细信息

应用基于浸入边界法(IBM)的三维水动力并行计算程序Cg LES_IBM,并结合隐式结构动力计算程序X-code,研究了低雷诺数条件下细长柔性立管的涡激振动问题。研究发现:立管的振动体现出明显的驻波振动特征。立管在顺流向主要激发奇数阶模态,而横流向处于激发状态模态的奇偶性取决于涡激振动卓越频率和立管固有频率之间的关系。涡激振动的频谱呈现为单谱模式,所有的振动能量都集中在一个窄频段上,波节处能量较弱,波腹处能量较强。波节处,时均能量传递系数为负值,涡激振动处于抑制状态,相邻波节之间,时均能量传递系数为正值,并沿展向呈现出"马鞍形"分布,涡激振动处于激发状态。柔性立管涡激振动的泻涡模式呈现出三维特性,近尾流区为2S模式,但由于倾斜泻涡造成尾涡沿展向移动,尾涡模式随后变为2P0模式,随着较弱漩涡的耗散,在远尾流区,尾涡模式又回到2S模式。

关键词：细长柔性立管能量传递尾流模式浸入边界法涡激振动

Lipid levels and insulin resistance markers in patients with colorectal cancer:Propensity score matching analysis

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World Journal of Gastrointestinal Oncology 2025年第1期17卷 130-142页

作者： Ren-Hao Hu dong-Yi Yan Ke-Hui zhang Di zhang Xi-Mao Cui Xiao-Hua Jiang Shun zhang Department of Gastrointestinal Surgery Shanghai East HospitalSchool of MedicineTongji UniversityShanghai 200120China School of Medicine Tongji UniversityShanghai 200092China Department of Emergency Medicine Shanghai East HospitalSchool of MedicineTongji UniversityShanghai 200120China

BACKGROUND Colorectal cancer(CRC)is a prevalent malignant neoplasm characterized by subtle early *** To investigate the correlation among serum lipid profiles,the triglyceride-glucose(TyG)index,and the atherosclerotic index(AI)in patients with ***,it explored the clinical diagnostic utility of combining serum lipids with cancer antigens in the context of *** A retrospective analysis encompassed 277 patients with CRC and 1034 healthy *** Following propensity score matching,patients with CRC exhibited significantly reduced levels of serum triglyceride(TG),total cholesterol(TC),high-density lipoprotein cholesterol,and low-density lipoprotein cholesterol(LDL-C),as well as a diminished TyG ***,they displayed elevated AI levels compared to their healthy *** in advanced stages exhibited lower serum levels of TG,TC,and LDL-C compared to those in early *** with positive lymph node metastasis demonstrated reduced levels of TG,LDL-C,and the TyG *** operating characteristic analysis revealed that the combination of the TyG index,carcinoembryonic antigen,and carbohydrate antigen 19-9 yielded the highest positive prediction rate for CRC at 75.3%.CONCLUSION Preoperative serum lipid profiles exhibit a robust association with patients with *** concurrent assessment of multiple serum lipids and cancer antigens effectively enhances the diagnostic accuracy for CRC.

关键词： Colorectal cancer Serum lipids Triglyceride-glucose index Atherosclerotic index Diagnostic marker

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文化体验视角下牧区民宿厨房服务系统设计

包装工程 2018年第10期39卷 111-116页

作者：韩冬楠张博苗秀内蒙古科技大学包头014010

目的在促进文化体验背景下,研究服务思维导入牧区民宿厨房设计中的新思路。方法运用文化的分层提取方法,从牧区牧民饮食文化的器物层、行为层、制度层、价值观层提取文化体验元素,建立牧区牧民饮食文化资源库,采用用户访谈和问卷法分析... 详细信息

目的在促进文化体验背景下,研究服务思维导入牧区民宿厨房设计中的新思路。方法运用文化的分层提取方法,从牧区牧民饮食文化的器物层、行为层、制度层、价值观层提取文化体验元素,建立牧区牧民饮食文化资源库,采用用户访谈和问卷法分析游客的文化体验需求。采用深度访谈、现场观察等调研方法分析当前牧区厨房的使用价值层痛点,采用服务设计的思维方式和工具推导出服务系统设计定位及产品功能定位。结论将服务设计思维导入牧区民宿厨房的设计开发之中,可以建立以厨房为主要产品的服务系统,以满足游客在牧区民宿旅游中基本的使用价值、文化体验和社交体验方面的需求,从而在某种程度上促进内蒙古民宿旅游的发展。

关键词：饮食文化文化体验民宿厨房服务系统设计

Flexible Graphene Field‑Effect Transistors and Their Application in Flexible Biomedical Sensing

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Nano-Micro Letters 2025年第2期17卷 252-313页

作者： Mingyuan Sun Shuai Wang Yanbo Liang Chao Wang Yunhong zhang Hong Liu Yu zhang Lin han Institute of Marine Science and Technology Shandong UniversityQingdao 266237ShandongPeople’s Republic of China State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100ShandongPeople’s Republic of China School of Integrated Circuits Shandong UniversityJinan 250100ShandongPeople’s Republic of China Shandong Engineering Research Center of Biomarker and Artificial Intelligence Application Jinan250100ShandongPeople’s Republic of China

Flexible electronics are transforming our lives by making daily activities more *** to this innovation are field-effect transistors(FETs),valued for their efficient signal processing,nanoscale fabrication,low-power consumption,fast response times,and ***,known for its exceptional mechanical properties,high electron mobility,and biocompatibility,is an ideal material for FET channels and *** combination of graphene and FETs has given rise to flexible graphene field-effect transistors(FGFETs),driving significant advances in flexible electronics and sparked a strong interest in flexible biomedical ***,we first provide a brief overview of the basic structure,operating mechanism,and evaluation parameters of FGFETs,and delve into their material selection and patterning *** ability of FGFETs to sense strains and biomolecular charges opens up diverse application *** specifically analyze the latest strategies for integrating FGFETs into wearable and implantable flexible biomedical sensors,focusing on the key aspects of constructing high-quality flexible biomedical ***,we discuss the current challenges and prospects of FGFETs and their applications in biomedical *** review will provide valuable insights and inspiration for ongoing research to improve the quality of FGFETs and broaden their application prospects in flexible biomedical sensing.

关键词： Flexible Graphene Field-effect transistor Wearable Implantable Biosensor