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近二十年中国旅游目的地品牌建设研究综述

江苏商论 2025年第1期 53-57页

作者：陈楠李博周健美河南大学研学旅行研究中心文化旅游学院河南开封475001

旅游地品牌建设是提升地方旅游竞争力的重要手段。以CNKI数据库2000—2022年收录的612篇国内旅游地品牌建设研究文献为样本数据,借助Cite Space对现有研究成果进行可视化分析,揭示近二十年来国内旅游地品牌建设的研究脉络和趋势特征。... 详细信息

旅游地品牌建设是提升地方旅游竞争力的重要手段。以CNKI数据库2000—2022年收录的612篇国内旅游地品牌建设研究文献为样本数据,借助Cite Space对现有研究成果进行可视化分析,揭示近二十年来国内旅游地品牌建设的研究脉络和趋势特征。结果显示:(1)研究自2000年起逐渐引起国内学者关注,2000—2022年发文量总体呈现曲折式增长趋势。(2)研究热点围绕乡村旅游、文化旅游、红色旅游、冬奥会等不同主体类型,基于品牌构建的不同过程展开,城市旅游品牌建设备受关注。(3)跨机构、不同学者之间的交流合作不足,缺乏跨学科的旅游地品牌研究成果。(4)未来研究中,一要推动旅游地品牌的跨学科研究,借助数理模型和量化方法,实现对文旅融合、乡村旅游等现有热点的纵向挖掘;二要积极拓展横向的研究范围,把握以冰雪项目为主的体育旅游品牌建设、媒体融合背景下的目的地品牌建设等潜在趋势,立足横向与纵向两个维度,完善目的地品牌建设的内容体系。

关键词：旅游地品牌品牌建设热点趋势 Cite Space

Development and validation of a nomogram for predicting metachronous peritoneal metastasis in colorectal cancer:A retrospective study

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World Journal of Gastrointestinal Oncology 2023年第1期15卷 112-127页

作者： bo Ban An Shang jian Shi Department of General Surgery The Second Hospital of Jilin UniversityChangchun 130041Jilin ProvinceChina

BACKGROUND Peritoneal metastasis(PM)after primary surgery for colorectal cancer(CRC)has the worst *** and early detection of metachronous PM(m-PM)have an important role in improving postoperative prognosis of ***,commonly used imaging methods have limited sensitivity to detect PM *** aimed to establish a nomogram model to evaluate the individual probability of m-PM to facilitate early interventions for high-risk *** To establish and validate a nomogram model for predicting the occurrence of m-PM in CRC within 3 years after *** We used the clinical data of 878 patients at the Second Hospital of Jilin University,between January 1,2014 and January 31,*** patients were randomly divided into training and validation cohorts at a ratio of 2:*** least absolute shrinkage and selection operator(LASSO)regression was performed to identify the variables with nonzero coefficients to predict the risk of *** logistic regression was used to verify the selected variables and to develop the predictive nomogram ***’s concordance index,receiver operating characteristic curve,Brier score,and decision curve analysis(DCA)were used to evaluate discrimination,distinctiveness,validity,and clinical utility of this nomogram *** model was verified internally using bootstrapping method and verified externally using validation *** LASSO regression analysis identified six potential risk factors with nonzero *** logistic regression confirmed the risk factors to be *** on the results of two regression analyses,a nomogram model was *** nomogram included six predictors:Tumor site,histological type,pathological T stage,carbohydrate antigen 125,v-raf murine sarcoma viral oncogene homolog B mutation and microsatellite instability *** model achieved good predictive accuracy on both the training and validation *** C-index,area under the curve,and

关键词： Colorectal cancer Metachronous peritoneal metastasis Risk factor Nomogram

Nonclassical Effects of a Four-Level Excited-Doublet Atom Model

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Communications in Theoretical Physics 2006年第6X期46卷 1069-1073页

作者： ZHANG jian-Song XU Jing-bo Zhejlang Institute of Modern Physics and Department of Physics Zhejiang University Hangzhou 310027 China

We adopt a dynamical algebraic method to study a four-level excited-doublet atom model and obtain the explicit expressions of the time-evolution operator and the density operator for the system. The nonclassical effects of the system, such as collapses and revivals of the atomic inversion and squeezing of the radiation field, are also discussed.

关键词： atom-field interaction nonclassical effects

Synthesis and Catalytic Activity of a Two-core Ruthenium Carbene Complex: a Unique Catalyst for Ring Closing Metathesis Reaction

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chemical Research in Chinese Universities 2011年第5期27卷 795-798页

作者： SHAO Ming-bo WANG jian-hui Department of chemistry College of Science Tianjin University Tianjin 300072 P. R. China

The reaction of a ruthenium carbide complex RuCl2（C：）（PCy3）2 with [H（Et2O）x]＋[BF4]- at a molar ratio of 1：2 produced a two-core ruthenium carbene complex, {[RuCl（=CHPCy3）（PCy3）]2（μ-Cl）3}＋·[BF4]-, in the form of a yellow-green crystalline solid in a yield of 94%. This two-core ruthenium complex is a selective catalyst for ring closing metathesis of unsubstituted terminal dienes. More importantly, no isomerized byproduct was observed for N-substrates when the two-core ruthenium complex was used as the catalyst at an elevated temperature（137 °C）, indicating that the complex is a chemo-selective catalyst for ring closing metathesis reactions.

关键词： Ruthenium carbene complex Ruthenium catalyst Ring closing metathesis Two-core

Effect of Co on the martensitic transformation,crystal structure and magnetization of Ni_(52.5) Mn_(23.5) Ga_(24) based ferromagnetic shape memory alloys

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Chinese Science Bulletin 2011年第8期56卷 796-802页

作者： YAN ShaoMeng PU jian CHI bo LI jian School of Materials Science and Engineering State Key Laboratory of Material Processing and Die & Mould Technology Huazhong University of Science & Technology Wuhan 430074 China

Five(Ni52.5Mn23.5Ga24)100-xCox(x = 0,2,4,6,8) alloys were prepared by arc melting,and the effects of Co addition on the martensitic phase transformation,crystal structure and magnetization were *** phase transformation temperatures Ms,Mf,As and Af are proportional to the content of Co in the(Ni52.5Mn23.5Ga24)100-xCox alloys,which appears to be due to the variation in the valance electron *** Curie temperature is sensitive to the composition of the *** the amount of Co changes,both the Co-Mn exchange interaction and the distance between Mn atoms ***,in turn,affect the Curie temperature and magnetization behavior of the *** martensite phases in all the alloys are domained in three different orientations,the domain boundary was determined to belong to the family of {112} lattice planes.

关键词：铁磁形状记忆合金马氏体相变晶体结构磁化强度 Co 真空电弧熔炼相变温度电子浓度

Ginsenoside Rk2, a dehydroprotopanaxadiol saponin, alleviates alcoholic liver disease via regulating NLRP3 and NLRP6 inflammasome signaling pathways in mice

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Journal of Pharmaceutical Analysis 2023年第9期13卷 999-1012页

作者： jian Zou Rujie Yang Ruibing Feng Jiayue Liu jian-bo Wan State Key Laboratory of Quality Research in Chinese Medicine Institute of Chinese Medical SciencesUniversity of MacaoMacao SARChina

Heavy alcohol consumption results in alcoholic liver disease(ALD)with inadequate therapeutic ***,we first report the potential beneficial effects of ginsenoside Rk2(Rk2),a rare dehydroprotopanaxadiol saponin isolated from streamed ginseng,against alcoholic liver injury in ***-plus-single-binge ethanol feeding caused severe liver injury,as manifested by significantly elevated serum aminotransferase levels,hepatic histological changes,increased lipid accumulation,oxidative stress,and inflammation in the *** deleterious effects were alleviated by the treatment with Rk2(5 and 30 mg/kg).Acting as an nucleotide-binding oligomerization domain-like receptor family pyrin domain-containing 3(NLRP3)inhibitor,Rk2 ameliorates alcohol-induced liver inflammation by inhibiting NLRP3 inflammasome signaling in the ***,the treatment with Rk2 alleviated the alcohol-induced intestinal barrier dysfunction via enhancing NLRP6 inflammasome in the *** findings indicate that Rk2 is a promising agent for the prevention and treatment of ALD and other NLPR3-driven diseases.

关键词： Alcoholic liver disease Ginsenoside Rk2 NLRP3 inflammasome NLRP6 inflammasome Intestinal barrier dysfunction

Preparation of Al-based amorphous coatings and their properties

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Journal of Rare Earths 2021年第3期39卷 340-347,I0004页

作者： Lei Jin Le Zhang Kaige Liu Zhigang che Kai Li Ming Zhang bo Zhang Science and Technology on Power Beam Process Laboratory AVIC Manufacturing Technology InstituteBeijing 100024China Department of Materials Application Research AVIC Manufacturing Technology InstituteBeijing 100024China Aeronautical Key Laboratory of Advanced Surface Engineering Technology AVIC Manufacturing Technology InstituteBeijing 100024China

Al_(86)Ni_(8)Co_(1)La_(1)Y_(2)Gd_(2) amorphous coatings were prepared using cold gas kinetic spray *** results show that Al_(86)Ni_(8)Co_(1)La_(1)Y_(2)Gd_(2) amorphous coatings are achieved with the porosity about 3.2%,thickness about 893 μm,the amount of amorphous phase about 82.5%,the hardness about 300 *** corrosion potential and anti-corrosion life of 7075 T6 alloy aluminum are about-0.78 V and 72 h,*** electrochemical analysis and neutral salt spray are about-0.69 V corrosion potential and 274 h anti-corrosion life for amorphous Al-based coatings,***,the life of the Albased amorphous coatings is about 3.8 times that of 7075 T6 aluminum ***,the failure mechanism was analyzed using TEM in this *** a word,Al_(86)Ni_(8)Co_(1)La_(1)Y_(2)Gd_(2) coatings keep dense structure,high amorphous content,favorable amorphous phase stabilizing ability and longer anticorrosion *** is,Al_(86)Ni_(8)Co_(1)La_(1)Y_(2)Gd_(2) coatings have better comprehensive ***,these findings indicate that the present Al_(86)Ni_(8)Co_(1)La_(1)Y_(2)Gd_(2) amorphous coatings prepared using cold gas kinetic spray technique can protect aluminum alloy very well and they can be considered to be used in aviation field.

关键词： Al-based amorphous material Coatings Cold spray Properties Rare earths

GENERAL FORM OF MATCHING EQUATION OF ELASTIC-PLASTIC FIELD NEAR CRACK LINE FOR MODE I CRACK UNDER PLANE STRESS CONDITION

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Applied Mathematics and Mechanics(English Edition) 2001年第10期22卷 1173-1182页

作者： YI Zhi-jian(易志坚) YAN bo(严波) Department of Bridge and Structure Engineeing Chongqing Jiaotong UniversityChongqing 400074 P R China Department of Engineering Mechanics Chongqing University Chongqing 400044 P R China

Crack line field analysis method has become an independent method for crack elastic-plastic analysis, which greatly simplifies the complexity of crack elastic-plastic problems and overcomes the corresponding mathematical difficulty. With this method, the precise elastic-plastic solutions near crack lines for variety of crack problems can be obtained. But up to now all solutions obtained by this method were for different concrete problems, no general steps and no general form of matching equations near crack line are given out. With crack line analysis method, this paper proposes the general steps of elastic plastic analysis near crack line for mode I crack in elastic-perfectly plastic solids under plane stress condition, and in turn given out the solving process and result for a specific problem.

关键词： crack elastic-plasticity crack-line analysis method crack line plane stress

Thickness-averaged model for numerical simulation of electroosmotic flow in three-dimensional microfluidic chips

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Applied Mathematics and Mechanics(English Edition) 2013年第3期34卷 297-308页

作者： bo cheN Han cheN jian-kang WU School of Civil Engineering and Mechanics Huazhong University of Science and Technology Wuhan 430074 P. R. China Wenhua Institute Huazhong University of Science and Technology Wuhan 430074 P. R. China

The microfiuidic system is a multi-physics interaction field that has at- tracted great attention. The electric double layers and electroosmosis are important flow-electricity interaction phenomena. This paper presents a thickness-averaged model to solve three-dimensional complex electroosmotic flows in a wide-shallow microchan- nel/chamber combined （MCC） chip based on the Navier-Stokes equations for the flow field and the Poisson equation to the electric field. Behaviors of the electroosmotic flow, the electric field, and the pressure are analyzed. The quantitative effects of the wall charge density （or the zeta potential） and the applied electric field on the electroosmotic flow rate are investigated. The two-dimensional thickness-averaged flow model greatly simplifies the three-dimensional computation of the complex electroosmotic flows, and correctly reflects the electrookinetic effects of the wall charge on the flow. The numerical results indicate that the electroosmotic flow rate of the thickness-averaged model agrees well with that of the three-dimensional slip-boundary flow model. The flow streamlines and pressure distribution of these two models are in qualitative agreement.

关键词： microfluidic electric double layer flow-electricity interaction electroosmo-sis thickness-averaged model