Numerical Simulation of Multiple Collisions Between Ice Ridge and Polar Ship

Ships navigating in ice-covered regions will inevitably collide with ice ridges.Compared to other ice bodies,ice ridges exhibit more complicated mechanical behaviors due to the scale and structure characteristics.In this paper,nonlinear finite element method is used to investigate the interaction between a polar ship and an ice ridge.The ice ridge is modelled as elastic-plastic material based on Drucker-Prager yield function,with the consideration of the influence of cohesion,friction angle and material hardening.The material model is developed in LS-DYNA and solved using semi-implicit mapping algorithm.The stress distribution of ice ridge and ship,and the ice load history are evaluated through the simulation of multiple collisions.In addition,parametric analysis is performed to investigate the influence of ridge thickness and impact velocity on the ice load and energy absorption.

过渡金属比例对锂离子电池LiNi_(x)Co_(y)Mn_(z)O_(2)层状材料电化学性能及热特性的影响

为了揭示LiNi_(x)Co_(y)Mn_(z)O_(2)(NCM)的性能随过渡金属(TM)成分的变化规律,系统研究TM比例对不同NCM材料的结构、形貌、电化学性能和热行为的影响。镍含量的增加能够提高可逆容量,但速率性能和循环稳定性变差。在富镍NCM中,Li^(+)的动力学抑制和电子导电性差是容量损失的主要原因。通过原位和非原位微量热法对不同NCM的热行为进行对比。结果表明,随着Ni含量的降低,材料的热稳定性显著提高。通过对NCM中Li剩余量的分析,对相变相关的氧释放量进行评估。结果表明,富镍材料在脱锂后出现更严重的结构恶化,起始温度更低,热释放量更多。综合表征表明,LiNi_(0.5)Co_(0.3)Mn_(0.2)O_(2)在电化学性能和安全性能间实现良好的平衡。

缅孟边境罗兴亚难民的人口学特征及其对区域地缘政治关系的影响——基于Palong Khali地区难民营地的分析

基于联合国难民署的动态监测数据,对2018年1月至2020年9月期间的缅孟边境罗兴亚难民人口规模、人口结构及其对区域地缘政治关系的影响进行分析。研究表明:1)缅孟边境罗兴亚难民规模大且呈不断增长的态势;女性难民多于男性,难民年龄结构趋于年轻型,以18岁以下的未成年人为主,青壮年难民占总人口比重次之且增长快速;在空间分布上表现出典型的“距缅孟边境的距离衰变规律”,即难民营地向西部扩张,难民规模呈现自东向西递减的分布规律。2)罗兴亚难民的人口规模及结构对区域地缘政治关系产生了显著影响。一是深刻影响着缅甸的民主化进程;二是对缅孟边境安全形成挑战,导致缅孟关系趋于紧张;三是引发了多地缘行为体的介入与关注,进而引发了围绕难民问题的地缘政治博弈,导致东盟内部的分化及其地缘政治的外溢效应。3)相较于部分西方国家及国际组织,中国提出的“三步走”解决方案符合缅孟两国的实际情况,在中缅孟联合工作组机制下,罗兴亚难民问题正朝着合作共商的道路积极推进解决。

2型糖尿病合并肥胖患者血清肌联素水平与胰岛素抵抗的相关性

目的 观察2型糖尿病(T2DM)合并肥胖患者血清肌联素(myonectin)水平的变化,探讨血清myonectin水平的影响因素及其与胰岛素抵抗的相关性。方法 选择2020年11月至2022年6月在河北北方学院附属第一医院内分泌科住院的186例T2DM患者,根据体重指数(BMI)分为糖尿病正常体重组(60例)、糖尿病超重组(65例)和糖尿病肥胖组(61例)。另选取同期于医院体检且BMI正常的健康者作为正常对照组(60例)。测定各组血清myonectin、空腹血糖(FPG)、空腹胰岛素(FINS)、糖化血红蛋白(HbA1c)、总胆固醇(TC)、甘油三酯(TG)、高密度脂蛋白胆固醇(HDL-C)、低密度脂蛋白胆固醇(LDL-C)水平,计算BMI及稳态胰岛素抵抗指数(HOMA-IR)。比较各组血清myonectin水平,并分析血清myonectin水平与胰岛素抵抗的相关性。结果 与正常对照组比较,糖尿病正常体重组、糖尿病超重组和糖尿病肥胖组的血清myonectin水平降低,差异有统计学意义(P<0.05)。与糖尿病正常体重组比较,糖尿病超重组和糖尿病肥胖组的myonectin水平降低,差异有统计学意义(P<0.05)。与糖尿病超重组比较,糖尿病肥胖组的myonectin水平降低,差异有统计学意义(P<0.05)。多元逐步回归分析表明,影响T2DM患者BMI的主要因素为myonectin、HOMA-IR、LDL-C、HDL-C、HbA1c。影响HOMA-IR的主要因素为myonectin、BMI、HbA1c、HDL-C。结论 血清myonectin水平在T2DM合并肥胖患者中显著降低,myonectin与胰岛素抵抗密切相关,与糖脂代谢共同参与了肥胖及糖尿病的发生、发展。

The efficiency and toxicity of dodecafluoro-2-methylpentan-3-one in suppressing lithium-ion battery fire

Currently,the effective and clean suppression of lithium-ion battery(LIB)fires remains a challenge.The present work investigates the use of various inhibitor doses(Xin)of dodecafluoro-2-methylpentan-3-one(C_(6) F_(12)O)in 300 Ah LIBs,and systematically examines the thermal and toxic hazards of the extinguished batteries via real scale combustion and gas analysis.The inhibitor is shown to be completely effective.The inhibition mechanism involves a combination of chemical inhibition and physical cooling.While the chemical inhibition effect tends to saturate with increasing Xin,the physical cooling remains effective at higher inhibitor doses.However,extinguishing the battery fire with a high Xin of C_(6)F_(12)O is found to incur serious toxicity problems.These results are expected to provide a guideline for the design of inhibitor doses for the suppression of LIB fires.

Two-dimensional ultrathin MoS2-modified black Ti^3+-TiO2 nanotubes for enhanced photocatalytic water splitting hydrogen production

Two-dimensional (2D) ultrathin MoS2-modified black Ti^3+-TiO2 nanotubes were fabricated using an electrospinning-hydrothermal treatment-reduction method.Bare TiO2 nanotubes were fabricated via electrospinning.Then,2D MoS2 lamellae were grown on the surface of the nanotubes and Ti^3+/Ov ions were introduced by reduction.The photocatalytic performance of the 2D MoS2/Ti^3+-TiO2 nanotubes was^15 times better than that of TiO2.The HER enhancement of the MoS2/Ti^3+-TiO2 nanotubes can be attributed to the Pt-like behavior of 2D MoS2 and the presence of Ti^3+-ions,which facilitated the quick diffusion of the photogenerated electrons to water,reducing the H2 activation barrier.The presence of Ov ions in the nanotubes and their hollow structure increased their solar utilization.

Annexin A1 Mimetic Peptide AC2-26 Inhibits Sepsis-induced Cardiomyocyte Apoptosis through LXA4/PI3K/AKT Signaling Pathway

The aim of the present study was to explore the effects of annexin A1(ANXA1) mimetic peptide AC2-26 on sepsis-induced cardiomyocyte apoptosis in vivo and in vitro and the underlying mechanisms.In the in vivo study,a rat septic model was established by the cecal ligation and puncture (CLP).The rats were divided into control group,sepsis group and AC2-26 group.The rats in the AC2-26 group were intraperitoneally injected with AC2-26(1mg/kg)2h before CLP,and those in the control group and sepsis group were injected with the same volume of normal saline.The myocardial tissue was examined by hematoxylin and eosin (HE)staining and transmission electron microscopy (TEM).Furthermore,myocardial apoptosis was measured by terminal dUTP nick end-labeling (TUNEL)assay.In the in vitro study,H9C2cells were cultured and divided into three groups:control group,in which cells were only given the basic culture medium;LPS group,in which cells were treated with 10μg/mL LPS;AC2-26 group,in which cells were treated with 0.5μmol/L AC2-262h before 10μg/mL LPS was given.The apoptosis of H9C2 cells was detected by flow cytometry.The levels of lipoxin A4 receptor (LXA4),phosphoinositide3-kinase (PI3K)and protein kinase B (PKB or AKT)protein were measured by Western blotting, the activity of NF-KB and the level of TNF-α by ELISA and the activities of caspase-3/8by using the caspase activity kits.The in vivo study showed that the myocardial pathological damage and myocardial ultrastructural damage were significantly alleviated and the myocardial apoptosis significantly decreased in the AC2-26 group as compared with the sepsis group (P<0.05 for all). The in vivo study revealed that the apoptosis of H9C2 cells was profoundly ameliorated in the AC2-26 group relative to the sepsis group (P<0.05).The protein expression levels of LXA4 were significantly up-regulated,and those of PI3K and AKT prominently down-regulated in the AC2-26 group when compared with those in the LPS group (P<0.05 for all).The activity of NF-κB was greatly inhibited and the level of TNF-α markedly decreased in the AC2-26 group as compared with those in the LPS group (P<0.05 for all).AC2-26 treatment also significantly suppressed the activities of caspase-3/8 in H9C2 cells.In conclusion,these findings suggest that AC2-26 may alleviate the sepsis-induced cardiomyocyte apoptosis in vivo and in vivo through the LXA4/PI3K/ AKT signaling pathway.

降低石墨微细鳞片含量的再磨工艺优化研究

对黑龙江某石墨粗精矿进行了立式搅拌磨机再磨试验。以陶瓷球为磨矿介质,研究了磨机转速、介质球直径、磨矿时间等工艺参数对石墨磨矿-浮选效果的影响。结果表明,石墨磨矿的优化工艺参数为:采用慢-快-慢交替的磨机转速,陶瓷介质球直径8~10 mm,磨矿时间5 min,在该优化条件下进行磨矿-浮选开路试验,获得了固定碳含量95.83%、-0.045 mm粒级含量24.51%、大鳞片(+0.15 mm)含量14.27%的石墨精矿。

Study on ReactiveAdsorption Desulfurization of Model Gasoline on Ni/ZnO-HY Adsorbent

The reactive adsorption desulfurization of model gasoline was carried out on Ni/ZnO-HY adsorbent.The Ni/ZnO-HY adsorbent was characterized by N2adsorption-desorption test(BET),X-ray diffractometry(XRD),and temperature-programmed reduction(TPR)analysis.The test results have demonstrated that HY-zeolite is a feasible support for Ni/ZnO components used in reactive adsorption desulfurization.The results of XRD and TPR analyses showed that most of nickel element was present as Ni2+species with only a small part existing as Ni3+species,and the Ni2+species had interactions with HY-zeolite.Under the conditions of this study,which specified a 50% ratio of HY-zeolite in the adsorbent,a Zn/Ni molar ratio of 10,and a reduction temperature of 400℃,the Ni/ZnO-HY adsorbent showed the best desulfurization performance.The sulfur capacity of Ni/ZnO-HY adsorbent could be recovered to 92.19% of the fresh one after being subjected to regeneration at 500℃,and could be maintained at 82.17% of the fresh one after 5 regeneration cycles.

二冬消渴方治疗阴虚热盛型2型糖尿病性干眼的临床疗效及对血清IL-17、IL-1β的影响

目的观察二冬消渴方治疗阴虚热盛型2型糖尿病性干眼的临床疗效及对血清白细胞介素-17(IL-17)、白细胞介素-1β(IL-1β)的影响,探讨二冬消渴方疗效机制。方法纳入江苏省中医院阴虚热盛证2型糖尿病性干眼患者110例,随机分为治疗组及对照组各55例,治疗组脱落5例,对照组脱落4例。对照组予基本降糖方案联合玻璃酸钠滴眼液外用治疗,治疗组在对照组治疗基础上加服二冬消渴方,2组疗程均为4周。治疗前后观察2组患者中医证候积分变化情况并评估中医临床疗效,检测血糖及胰岛功能相关指标[空腹血糖(FBG)、空腹胰岛素(FINS)、空腹C肽(FCP)、餐后2 h血糖(PBG)、胰岛素分泌功能指数(HOMA-β)、胰岛素抵抗指数(HOMA-IR)]、眼表指标[泪膜破裂时间(BUT)、角膜荧光素钠染色(FL)、SchirmerⅠ试验(SⅠT)]及炎症相关指标(IL-17、IL-1β)的变化情况,治疗期间观察2组患者不良反应发生情况。结果治疗后,2组患者中医证候总积分均明显减少(P<0.01),治疗组优于对照组(P<0.01),治疗组中医临床总有效率高于对照组(P<0.01);2组患者SⅠT和BUT均明显增加(P<0.01),治疗组优于对照组(P<0.05,P<0.01);2组患者FL均显著降低(P<0.01),组间无显著差异;治疗组患者血清IL-17、IL-1β均显著下降(P<0.01),明显优于对照组(P<0.05)。治疗前后2组患者血糖及胰岛功能相关指标未见明显变化(P>0.05)。治疗期间,2组患者均未见明显不良反应。结论二冬消渴方可改善糖尿病性干眼患者SⅠT、BUT、FL及眼部症状,有效治疗糖尿病干眼,减轻眼表炎症,其机制可能与降低血清炎症因子IL-17、IL-1β有关。

基于计划行为理论的生活方式管理在多囊卵巢综合征患者中的应用

目的评价基于计划行为理论(TPB)的生活方式管理在多囊卵巢综合征(PCOS)患者中的应用效果。方法选取北京大学第三医院2022年1月至8月于生殖中心门诊确诊为PCOS的76例患者作为研究对象,根据患者就诊的先后顺序,将2022年1月至4月确诊的41例患者纳入实验组(基于TPB生活方式管理),2022年5月至8月确诊的35例患者纳入对照组(常规生活方式管理)。干预3个月后,比较干预前后两组患者体重指数(BMI)、腰臀比和生活质量。结果干预3个月后,实验组患者BMI和腰臀比均低于对照组(P<0.05),生活质量总分、体质量和不孕症维度得分高于对照组(P<0.05)。结论基于TPB生活方式管理降低了患者的BMI和腰臀比,帮助患者进行健康的生活方式管理,改善了生活质量。

Anti-cancer activity of an ethyl-acetate extract of the fruits of Terminalia bellerica(Gaertn.)Roxb.through an apoptotic signaling pathway in vitro

Objective:To investigate the biochemical constituents of the fruits of Terminalia bellerica(Gaertn.)Roxb.(hereafter termed T.bellerica)and estimate the anti-cancer activity of different polar extracts.Methods:To rapidly screen and identify the biochemical constituents of ethyl acetate(EA)extracts of T.bellerica,ultra performance liquid chromatography-electrospray ionization/mass spectrometry(UPLC-ESI-MSn)was done.The CellTiter-BlueTM cell-viability assay was used to ascertain the anti-cancer activity of different polar extracts in 10 human cancer cell lines.Results:Forty polyphenols of the EA extract of T.bellerica were characterized tentatively.The EA extract exhibited significant anti-cancer activity against ZR-75-1 cells(half-maximal inhibitory concentration=27.33(0.98)μg/mL)and Colo-205 cells(39.65(2.99)μg/mL)in vitro.Treatment of ZR-75-1 cells with 20 and 60μg/mL of the EA extract elicited dosedependent apoptosis percentages at an early stage of 17.58(0.74)%and at a late stage of 29.20(1.22)%;Colo-205 cells at the same concentration of EA extract had values of 21.33(1.03)%and 40.55(0.34)%,respectively.Western blotting suggested that ZR-75-1 and Colo205 cells treated with the EA extract showed a similar increasing tendency for expression of cleaved anti-poly adenosine diphosphate ribose polymerase I.Conclusion:We identified a total of 40 chemical constituents,of which 11 were first obtained from the Terminalia Linn.genus using UPLC-ESI-MSn.Meanwhile,we observe that the EA extract of T.bellerica possesses anti-cancer activity,especially against breast and colon cancers.

Preparation of Low Cost Activated Carbon from Deactivated Resin Catalyst for Methyl Tert-Butyl Ether Synthesis and Its Application in Dimethyl Sulfide Adsorption with Transition Metal Impregnation

In this paper, a low-cost activated carbon(AC) was prepared from deactivated resin catalyst(DRC) for methyl tert-butyl ether(MTBE) synthesis through carbonization and subsequent steam activation treatment. The activated carbon was characterized in detail. After loading various transition metals, including Cu^(2+), Ag+, Co^(2+), Ni^(2+), Zn^(2+), and Fe^(3+) via the ultrasonic-assisted impregnation method, a series of metal-loaded adsorbents(xM-AC) were obtained and their dimethyl sulfide(DMS) adsorption performance was investigated in a batch system. Among these adsorbents, 15Cu-AC presented a superior DMS adsorption capacity equating to 58.986 mg/g due to the formation of S-M(σ) bonds between Cu^(2+) and sulfur atoms of DMS as confirmed by the Raman spectra and kinetic study.

Development and Commercial Application of Supported Palladium Catalyst for Isomerization of C_5/C_6 Hydrocarbons

1 Introduction China has enforced a new gasoline standard starting 2003 to limit the olefins, aromatics and benzene contents in gasoline.The isomerate is the cleanest gasoline component because it does not contain the above-mentioned components, and is also an excellent gasoline blending component because of its higher RON and MON ratings.

High levels of genetic diversity and an absence of genetic structure among breeding populations of the endangered Rufous-backed Bunting in Inner Mongolia,China:implications for conservation

Background:The Rufous-backed Bunting,Emberiza jankowskii,is an endangered species that is primarily distributed in Inner Mongolia,China.The main threats to the continued persistence of this species are habitat loss and degradation.However,the impact of population loss on genetic diversity remains unclear.To support future conservation and management efforts,we assessed the genetic diversity and population structure of E.jankowskii using mitochondrial DNA and microsatellites.Methods:Blood samples were collected from 7-8-day-old nestlings in Inner Mongolia,China between May and August of 2012 and 2013.Mitochondrial DNA sequences and microsatellite markers were used to assess the genetic diversity,genetic structure and inbreeding of E.jankowskii.The results of genetic diversity and inbreeding were compared to other avian species.Results:We found an unexpectedly high level of genetic diversity in terms of mitochondrial DNA and microsatellite compared to other avian species.However,there were high levels of gene flow and minimal genetic structuring,among the fragmented breeding populations of E.jankowskii in Inner Mongolia.These findings suggest that E.jankowskii in Inner Mongolia is a metapopulation.Despite the high genetic diversity of E.jankowskii,local populations in each small patch remain at risk of extinction due to habitat loss.In addition,the E.jankowskii population has a high risk of inbreeding.Conclusions:To minimize further loss of genetic diversity of this endangered species,we suggest that the E.jankowskii in Inner Mongolia should be considered as a protected species for management purposes.Conservation efforts should concentrate on E.jankowskii habitat management.This may be most effectively achieved by protecting the current breeding habitats and prohibiting over-grazing.

circFAT1调节miR-211-5p/CCND2轴对糖尿病心肌病大鼠心肌损伤的影响

目的探讨circFAT1对糖尿病心肌病(DCM)大鼠心肌损伤的影响及对miR-211-5p/细胞周期蛋白D2(CCND2)轴的调节机制。方法利用高糖高脂饲料联合链脲佐菌素建立DCM大鼠模型,并随机分为DCM组、circ-NC组、circFAT1组、circFAT1+激动剂-NC组和circFAT1+miR-211-5p激动剂组,以喂食普通饲料的大鼠作为对照组,每组20只。实时PCR检测心肌组织中circFAT1、miR-211-5p、CCND2水平;Western blotting检测心肌组织CCND2蛋白表达;生化分析仪检测大鼠空腹血糖(FBG)、总胆固醇(TC)和甘油三酯(TG)水平;心脏超声检测大鼠心功能;HE和Masson染色观察心肌组织病理形态;TUNEL染色检测心肌细胞凋亡情况;ELISA法检测白细胞介素-1β(IL-1β)、白细胞介素-6(IL-6)和肿瘤坏死因子-α(TNF-α)水平;双荧光素酶报告基因实验验证circFAT1、miR-211-5p、CCND2之间的靶向关系。结果与对照组相比,DCM组circFAT1、CCND2 mRNA及蛋白表达,左心室射血分数(LVEF)、左心室缩短分数(LVFS)水平降低(P<0.05),FBG、TC、TG、左心室舒张末期直径(LVEDd)、左心室收缩末期直径(LVEDs)、胶原容积分数(CVF)、细胞凋亡率、IL-1β、IL-6、TNF-α水平均升高(P<0.05);与DCM组相比,circFAT1组circFAT1、CCND2 mRNA及蛋白表达,LVEF、LVFS水平升高(P<0.05),FBG、TC、TG、LVEDd、LVEDs、CVF、细胞凋亡率、IL-1β、IL-6、TNF-α水平降低(P<0.05);miR-211-5p激动剂逆转了circFAT1对DCM心肌损伤的缓解作用,且CCND2 mRNA及蛋白表达降低(P<0.05)。结论circFAT1通过调控miR-211-5p/CCND2轴减轻DCM大鼠心肌组织损伤。

辅助生殖科护士岗位胜任力评价指标体系的构建研究

目的构建辅助生殖科护士岗位胜任力评价指标体系。方法以岗位胜任力“冰山模型”为理论依据,通过文献回顾和半结构式访谈初步构建辅助生殖科护士岗位胜任力评价指标体系;通过德尔菲法对13个省市20名专家开展2轮函询,并结合层次分析法计算各级指标权重。结果2轮专家咨询的问卷回收率均为100%(20/20),专家权威系数分别为0.898、0.900,总指标的肯德尔和谐系数分别为0.318、0.346(均P<0.01)。构建的辅助生殖科护士岗位胜任力评价指标体系包括一级指标4项、二级指标15项、三级指标56项。结论本研究构建的辅助生殖科护士岗位胜任力评价指标体系科学、可靠、内容合理,可为辅助生殖科护士岗位培训、考核提供依据。

复元止痛方辅助腰背肌功能训练对腰椎术后慢性腰痛患者疼痛缓解和腰椎功能康复的影响

目的探讨复元止痛方辅助腰背肌功能训练对腰椎术后慢性腰痛患者疼痛缓解和腰椎功能康复的影响。方法选取2021年1月-2023年1月收治的腰椎术后慢性腰痛患者86例,分为对照组和观察组,各43例。对照组患者采用塞来昔布胶囊口服+腰背肌功能训练治疗,观察组患者在对照组治疗基础上联合复元止痛方治疗,连续治疗4周。观察2组患者治疗前后中医症状积分、VAS和ODI评分、血清炎性因子[肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)、白介素-6(interleukin-6,IL-6)、C反应蛋白(C-reactive protein,CRP)]水平改善情况,并比较2组治疗后总有效率及治疗方案的安全性。结果治疗后,2组腰痛如针刺、疼痛拒按、腰椎活动受限、舌质紫黯积分,VAS评分,ODI评分均明显降低(P<0.05),且观察组治疗后中医症状积分及量表评分均低于对照组(P<0.05);2组TNF-α、IL-6、CRP均显著下降(P<0.05),观察组低于对照组(P<0.05);观察组总有效率93.02%明显高于对照组76.74%(P<0.05);观察组药物不良反应总发生率4.65%明显低于对照组23.26%(P<0.05)。结论采用复元止痛方配合腰背肌功能训练治疗腰椎术后慢性腰痛,能够有效减轻疼痛程度,降低炎性因子水平,促进腰椎功能恢复和临床症状缓解,且治疗安全性较高。

急性缺血性脑卒中患者Willis环变异与静脉溶栓预后分析

目的:探讨Willis环变异与急性缺血性脑卒中患者静脉溶栓后预后的相关性。方法:回顾性收集2015年1月至2018年12月我院神经内科经rt?PA静脉溶栓治疗的急性缺血性脑卒中患者,共244例。按Willis环形态分为完整型、部分完整型、不完整型3组,观察并比较溶栓后12个月复发及死亡。结果:患者Willis环表现为完整型的机率女性高于男性(分别为:23.4%,9.44%,χ^2=8.162,P=0.017)。Logistic回归分析结果显示:颈内动脉病变[OR 95%CI=(1.237,7.285)]、大脑中动脉病变[OR 95%CI=(1.200,5.318)]、Willis环变异[OR 95%CI=(1.020,3.341)]与急性缺血性脑卒中溶栓患者12个月后复发及死亡相关。结论:Willis环变异性影响溶栓患者预后,及时评估有助于判断预后,指导临床治疗。

基于PLS-SEM模型的旅游目的地品牌资产形成路径研究——来自大理洱海生态廊道的实证研究

旅游目的地品牌资产建设是旅游目的地品牌化的核心内容。从游客的视角建立包括品牌知名度、品牌感知质量、品牌体验、品牌感知价值和品牌忠诚五个构成要素的旅游目的地品牌资产模型,并对大理洱海生态廊道的游客进行调查,收集了482份有效问卷,建立了基于PLS-SEM的大理洱海生态廊道品牌资产路径模型,发现品牌资产各构成要素对品牌忠诚的总效应从大到小依次排序为:品牌感知质量、品牌知名度、品牌体验、品牌感知价值,提出了构建旅游目的地品牌资产的建议。