Exploring tourism networks in the Guangxi mountainous area using mobility data from user generated content

Tourism-led economic growth and tourism-driven urbanization have attracted increasing attention by provinces and regions in China with abundant tourism resources.Due to low data availability,the current tourism literature lacks empirical evidence of the tourism network in lessdeveloped mountainous regions where the development of transport infrastructure is more variable.This paper aims to provide such evidence using Guangxi Zhuang Autonomous Region in China as a case study.Using User Generated Content(UGC)data,this study constructs a tourism network in Guangxi.By integrating social network analysis with spatial interaction modelling,we compared the impact of two different transport infrastructures,highway and high-speed railway,on tourist flows,particularly in less-developed mountainous regions.It was found that the product of node centrality and flow could best describe the significant pushing and pulling forces on the flow of tourists.The tourism by high-speed railway was sensitive to the position of trip destination on the whole tourism network but self-drive tourism was more sensitive to travelling time.The increase of high-speed railway density is crucial to promote local tourism-led economic development,however,large-scale karst landforms in the study area present a significant obstacle to the construction of high-speed railways.

Experimental Study on the Effect of Fine-Grained Soil Content on the Freezing Strength of Aeolian Sand-Cement Interface

In cold regions,understanding the freezing strength of the interface between soil and structure is crucial for designing frost-resistant foundations.To investigate how the content of cement powder in aeolian sand affects this strength,we conducted direct shear tests under various conditions such as different fine-grained soil content,normal stress,and initial moisture content of the soil.By analyzing parameters like soil properties,and volume of ice content,and using the Mohr-Coulomb strength theory to define interface strength,we aimed to indirectly measure the cementation strength of the interface.Our findings revealed that as the particle content increased,the interface stress-strain curves became noticeably stiffer.We also observed a positive linear relationship between freezing strength and silt content,while the initial moisture content of the soil did not significantly impact the strengthening effect of fine-grained soil on freezing strength.Moreover,we discovered that as the powder content increased,the force binding the ice to the interface decreased,while the friction angle at the interface increased.However,the cohesion force at the interface remained relatively unchanged.Overall,our analysis suggests that the increase in freezing strength due to fine-grained soil content is primarily due to the heightened friction between aeolian sand and the interface.

The Physico-Chemical Composition and Energy Recovery Potentials of Municipal Solid Waste Generated in Numan Town, North-Eastern Nigeria

Numan is an urban center in Adamawa State North-Eastern Nigeria. Its waste characteristics are similar to other places in sub-Saharan Africa. In this paper, the physico-chemical characterization of municipal solid waste generated in Numan Town was carried out to estimate the electrical power to be generated from it. The solid waste types were observed to comprise of polythene (27%), organic waste (24.1%), plastic (10.2%), textile (13.2%), paper (9.8%), glass (9.3%) and metals (6.4%). The moisture content as discarded and daily average solid waste generation rate are 16.49% and 0.583 kg/sec respectively. The chemical formula with and without water was determined as C923.28H1632.60O258.28N12.89S and C923.28H2099.70O494.16N12.89S respectively. The suitability of the municipal solid waste as a possible source of electrical power was also considered. The energy content of the solid waste on ash free dry-basis was determined as 20861.48 kJ/kg. The estimated power generation per day using incinerating plant at an assumed efficiency of 25% was 3031.5 kW.

Influence of Some Physicochemical Exposure Factors on the Metronidazole Content of a Pharmaceutical Product: Flagyl®250 mg Tablet

The present work aims to study the influence of some physicochemical parameters (light, temperature, ethanol, bile salts, potassium hydroxide, hydrogen peroxide) on the content of Metronidazole (MTZ) contained in the reference substance (SR) and in a pharmaceutical specialty Flagyl® 250 mg tablet (FLG). The method developed was linear and accurate in accordance with USP 38 and the MTZ contents were obtained by UV-visible spectrophotometry at 278 nm. These contents ranged from 225 mg to 275 mg and were thus consistent with the concentration present in the proprietary medicines (250 mg). The study of the influence of physicochemical parameters on the MTZ content in SR and FLG showed that MTZ contents are unstable in the presence of Ethanol at 96˚, KOH at 0.1N and bile salts but also when the temperature is higher than 25˚C. However, they remain stable in the presence of light and H2O2 and undergo degradation in an acidic environment.

Influence of Some Physico-Chemical Exposure Factors on the Carbocysteine Content of an Opened Pharmaceutical Product

The aim of this study was to investigate the stability of Carbocysteine (CBC) contained in a reference substance (RS) and in a sample of opened RHINATHIOL® 5% syrup (RNTL 5%) under the effect of some physicochemical parameters (temperature, light, time, pH, bile salts). The developed method was linear, precise and accurate according to USP 38. The co-efficient of determination R2 for linearity was 0.9993. The respective RSD of intra-day and inter-day between days (1st, 2nd and 3rd day) were respectively 0.338% and the interval from 0.05% to 0.387%. The average recovery rate ranged from 98.490% to 100.450%. The detection and quantification limits were 0.0001 mg/mL and 0.001 mg/mL respectively. The method was applied to four samples of opened syrup containing CBC and the CBC content in these samples was found to be in accordance with USP 38. The CBC content in the opened sample of RNTL 5% was obtained by UV-visible spectrophotometry at 217 nm and was 4.887 g/100mL. The study of the influence of physico-chemical factors on the content of CBC in RS and RNTL 5% showed that the evolution of CBC contents in each drug matrix remained dependent on pH and temperature. However, these levels remained stable in the presence of light.

Influencing factors of gas content evaluation for shale gas:a case study of Lower Paleozoic Wuling fold belt in Upper Yangtze Basin

Factors of shale gas accumulation can be divided into the external and internal factors,according to accumulation mechanism and characteristics of shale gas. The internal factors mainly refer to parameters of organic geochemistry,mineral components and physical parameters. Six factors were presented in this study,i. e.organic matter,maturity,quartz,carbonate,clay mineral and pore. The external factors mainly refer to geologic environment of shale gas reservoir,including four factors: temperature,pressure,depth and thickness.Based on the experiment results of 26 samples of drilling cores from Wuling fold belt in Lower Paleozoic Silurian of the Upper Yangtze Basin,combined with the integrated analysis of geology,logging and test,the correlation of the gas content of shale gas to the above-mentioned ten factors was concluded. Six important evaluation indicators were preliminarily established in the gas-bearing core area of marine shale in the Upper Yangtze Basin.

The influence of ultra-low moisture content on the seed viability of rice in store

This paper deals with the influence of ultra-lowmoisture content and the rate of desiccation on rice seed viability and physiological property bydesiccating using four kinds of desiccants(phos-

Understanding Credit Risk in Internet Consumer Finance:An Empirical Analysis with a Focus on the Young Generation

In recent years,internet finance has garnered increasing attention from the public.Online lending,emerging within the framework of Internet finance as a pivotal component,has witnessed substantial growth.While online credit,within the realm of Internet finance,presents numerous advantages over traditional lending,it concurrently exposes a plethora of credit risk issues.This study aims to facilitate the effective utilization of online credit tools by the young generation within the context of Internet finance.Additionally,it seeks to ensure the overall stability of the Internet finance environment and mitigate risks for the youth.Given the significance of understanding credit risk management for college students in the age of internet finance,this paper adopts the logistic model to evaluate credit risk in internet consumer finance and provides pertinent recommendations from the perspective of the young generation.

祁连山典型植被土壤有机碳分布特征及其影响因素

探讨祁连山典型植被土壤有机碳空间分布特征及其影响因素,可为评估该地区森林土壤固碳效应提供科学依据。以退耕地为对照,以草地、天然乔木(青海云杉、祁连圆柏)、人工乔木(落叶松)和灌木5种典型植被为研究对象,测定0~100 cm深度土壤有机碳含量、有机碳密度、土壤粒度、pH、电导率、全氮、全钾和全磷含量,比较分析不同植被土壤有机碳组分的分布差异及其主要影响因素。结果表明:1)不同植被类型平均土壤有机碳含量排序为青海云杉(5.99 g/kg)>祁连圆柏(5.59 g/kg)>落叶松(2.91 g/kg)>灌木(1.83 g/kg)>草地(1.66 g/kg)>退耕地(1.16 g/kg);平均土壤有机碳密度排序为青海云杉(3.43 kg/m^(2))>祁连圆柏(2.76 kg/m^(2))>落叶松(2.16 kg/m^(2))>灌木(2.08 kg/m^(2))>草地(2.00 kg/m^(2))>退耕地(1.33 kg/m^(2))。2)随着土层的加深,不同植被土壤有机碳含量整体上呈减小的趋势,土壤有机碳密度呈先增后减的趋势。3)不同植被类型土壤C/N为9.30~15.73,均值表现为青海云杉(14.96)>草地(11.66)>退耕地(11.54)>灌木(10.83)>落叶松(10.69)>祁连圆柏(10.63)。4)不同植被类型土壤有机碳和全氮含量均呈极显著正相关(P<0.01),有机碳与全磷、黏粒、粉粒呈极显著或显著正相关(P<0.01,P<0.05),有机碳与砂粒含量呈极显著或显著负相关(P<0.01,P<0.05),有机碳与pH均呈显著负相关(P<0.05)。祁连山自然生长的乔木土壤有机碳固持能力较好,在建设碳汇林时应充分考虑土壤有机碳的影响,优先选择乔木植被。

尕斯高盐油藏污水配聚阳离子对聚合物溶液黏度影响的主控因素

根据青海油田尕斯区块回注污水矿化度较高的特点,以山东宝莫生产的聚合物为研究目标,系统探讨了从聚合物驱采出水中的Na^(+)、K^(+)、Ca^(2+)、Mg^(^(2+))、Fe^(2+)、Fe^(3+)等6种离子对聚合物溶液的黏度和稳定性影响的变化规律,并提供了回注污水配聚主要研究方法。结果表明:导致聚合物黏度降低的主要控制因素是高价阳离子,其影响顺序从大到小的次序是Fe^(2+)、Fe^(3+)、Mg^(^(2+))、Ca^(2+)、Na+、K+;而高价阳离子对聚合物溶液黏度稳定性影响顺序从大到小的次序则是:Fe^(2+)、Ca^(2+)(Mg^(^(2+)))、Fe^(3+)、Na^(+)(K^(+))。研究结果展示了回注污水配聚中阳离子对聚合物溶液黏度的响应机理,为聚合物驱技术提供了理论指导。

在线平台竞争功能组合对创作者内容采纳的影响研究——来自视频弹幕类平台的实证检验

[目的/意义]为在线平台创作者生成内容优化,以及在线平台内容采纳率提升提供新思路。[研究设计/方法]将传统应用于企业竞争策略组合研究的竞争组合理论,拓展到在线平台个人信息情境。以视频弹幕类在线平台“哔哩哔哩”为例,基于二手数据抓取,分析在线平台竞争功能组合的数量、复杂度与异质性对创作者内容采纳的影响。[结论/发现]在线平台情境下,竞争功能组合的数量与异质性会显著正向影响创作者的内容采纳,而竞争功能组合的复杂度会显著负向影响创作者的内容采纳。同时,竞争功能组合数量、复杂度与异质性的影响作用存在交互性。[创新/价值]为视频弹幕类平台的内容生态优化以及创作者的内容采纳率提升提供借鉴,丰富用户行为与信息服务研究的理论和实践体系。

基于内容挖掘的学术论文影响力研究现状与展望

当前,以ChatGPT为代表的人工智能技术飞速发展,文本挖掘平台的功能优化加快有关内容挖掘的学术论文影响力研究进程,全面梳理基于内容挖掘的学术论文影响力测度的研究现状和进展迫在眉睫。通过梳理国内外利用内容挖掘方法测度学术论文影响力的研究,提出从学术、社会和技术3个维度阐述学术论文影响力的内涵。在其基础上,以时间为轴线,重点论述“学术论文影响什么、怎么影响,以及影响程度如何”的相关内容,深入阐述借助内容挖掘技术的学术论文影响力测度指标和方法。目前,基于内容挖掘的学术论文影响力测度还需利用以ChatGPT为代表的文本挖掘平台和数智技术进一步挖掘相关语义特征,深入探究引文背后的影响机制及理论,尝试从学术、社会和技术等维度,词语、句子、篇章等粒度深入文本内容,综合测度论文影响力。

沙颍河典型河段河岸带土壤理化性质对地下水氮污染的影响

以沙颍河典型河段为研究对象,通过采集果园和农田河岸带的河水、土壤以及地下水样品,并进行理化指标分析,旨在深入探讨土壤理化性质对河岸带地下水氮浓度的影响机制.结果表明:农田河岸带土壤总氮(TN)含量明显高于果园河岸带,达到其TN的1.15倍,并均在距河岸约200m处达到最高值.河岸带地下水与土壤氮含量有一定的响应关系,呈现出相似的空间分布特征.农田河岸带地下水NO_(3)--N浓度(0.56~25.17mg/L)显著高于果园河岸带(0~0.97mg/L);远岸(>200m)地下水NO_(3)--N浓度均高于近岸(<100m).土壤氮素是河岸带地下水氮污染的主要来源之一.土壤中的黏土颗粒含量和施氮量较高,使得土壤颗粒更易于吸附NO_(3)--N,增加了河岸带地下水氮污染的风险.本研究揭示了河岸带土壤理化性质对地下水氮含量的影响机制,为河岸带地下水氮污染防控提供了参考依据.这些发现有助于制定可行的土地管理策略,以减缓或防止地下水氮污染的进一步扩散.

运脾消食方提取工艺放大影响因素研究

目的考察运脾消食方提取工艺放大影响因素。方法HPLC法测定儿茶素、阿魏酸、花旗松素、异牡荆素、芸香柚皮苷、白术内酯Ⅱ、柚皮苷、桑色素、橙皮苷、木犀草素、常春藤皂苷元、白术内酯I、柚皮素、橙皮素的含量,建立指纹图谱,评价容器体积、火候、投料量对各成分含量的影响。结果15批样品指纹图谱相似度均大于0.995。14种成分在各自范围内线性关系良好(r>0.9990),平均加样回收率96.4%~103.3%,RSD 0.5%~2.7%。火候的影响程度大于提取容器体积、投料量。结论多成分含量测定结合指纹图谱可为运脾消食方提取工艺放大后一致性评价的共性技术提供数据基础和理论参考。

融合多种特征的多学科引文分类研究

引文分类研究作为深入理解引用行为的主要方式,在文献管理、检索与利用等多个场景中发挥着重要作用。本研究通过机器学习的方法,在回顾了重要的引用行为机理研究与引文分类研究的基础上,对引文分类做进一步探索。本研究通过匹配文献数据库和文档解析的方式,使得原始数据集的字段得以补充和增加,并在构建引文分类模型的过程中,提取了四大类可能与引文分类相关的特征;然后,通过模拟退火算法进行特征选择。研究结果显示,本研究建立的随机森林模型对引文影响力和引文功能分类的表现较好,优于支持向量机与SciBERT结合线性层的分类模型。本研究建立的模型提升了多学科引文自动分类的性能,关于特征提取和选择的过程以及对引文类别和一些因素间关系的探索,对相关研究具有一定的参考价值。

八角莽草酸含量影响因素研究进展

八角是广西南部的特色植物,其果实具有独特的香气,是我国及东南亚地区常用烹饪的调味品之一,同时也是药用、化工等方面的重要原料。八角果实含有大量的莽草酸,其枝条、叶片上也有少量莽草酸分布。莽草酸是植物和微生物的重要代谢产物,具有抗炎、镇痛的作用,可作为抗病毒和抗癌药物的中间体,也是治疗当前流行的甲型流感特效药“磷酸奥司他韦”的主要成分。随着科学技术进步,八角莽草酸的研究已经取得了一定的进展,尤其是在提取技术、分离工艺、生理活性及其应用等方面。文章综述了八角莽草酸含量影响因素研究情况,总结了影响八角莽草酸含量的因素。影响八角莽草酸含量的因素可分为内部因素和外部因素2种,其中外部因素主要有不同的生境、不同产地、不同采收期等,内部因素主要有生长发育过程、遗传因素等,同时不同的提取工艺提取到的莽草酸含量也不同。最后,对后期的研究方向提出展望,以期为相关领域的深入研究提供参考。

Cogeneration of Innovative Audio-visual Content: A New Challenge for Computing Art

In recent years,computing art has developed rapidly with the in-depth cross study of artificial intelligence generated con-tent(AIGC)and the main features of artworks.Audio-visual content generation has gradually been applied to various practical tasks,including video or game score,assisting artists in creation,art education and other aspects,which demonstrates a broad application pro-spect.In this paper,we introduce innovative achievements in audio-visual content generation from the perspective of visual art genera-tion and auditory art generation based on artificial intelligence(Al).We outline the development tendency of image and music datasets,visual and auditory content modelling,and related automatic generation systems.The objective and subjective evaluation of generated samples plays an important role in the measurement of algorithm performance.We provide a cogeneration mechanism of audio-visual content in multimodal tasks from image to music and display the construction of specific stylized datasets.There are still many new op-portunities and challenges in the field of audio-visual synesthesia generation,and we provide a comprehensive discussion on them.

隐形三角引用:科学论文中的不规范引用行为

[目的/意义]在科学知识快速更迭的时代背景下,文献引用不规范行为逐渐演化为潜踪匿迹、形式多样的复杂现象,通过文献来源信息建立引用不规范行为的识别方法,并揭示其形成过程的影响因素与内在机理,对于科技期刊规范化、科学评价体系公平化、学术生态环境完善化具有重要意义。[方法/过程]首先,构建引文内容相似度、使用—引用转化率、耦合强度等多维度判定指标;其次,结合相关文献特征与引用内容特征,探究不规范引用行为背后的影响因素与引用情境。[结果/结论]本文在300万条文献耦合数据中发现了近4万组隐形三角引用关系,表征了隐形三角引用行为在科学界的普遍存在。在引用情境分析中,文献语言、文献类型、所属学科领域是文献C转引文献A的影响因素,文献A、B所在期刊影响力、自身被引影响力、发表时间差异是文献C选择匿引文献B的影响因素。科学界应意识到这种不规范引用行为的紧迫性和重要性,逐步建立识别与监督机制。

基于精确扩散反演的生成式图像内生水印方法

扩散模型在图像生成方面取得了显著成就,但生成的图像真假难辨,因此滥用扩散模型将引发隐私安全、法律伦理等社会问题。对生成模型的输出添加水印可以追踪生成内容版权,防止人工智能生成内容造成潜在危害。对于去噪扩散模型,在初始噪声向量中添加水印的内生水印方法可直接生成含水印图像,版权验证时通过反向扩散重建初始向量以提取水印。但扩散模型中的采样过程并不是严格可逆,重建的噪声向量与原始噪声存在较大误差,很难保证水印的准确提取。通过引入基于耦合变换的精确反向扩散,可以更加准确地重建初始噪声向量,提升水印提取的准确性。通过实验验证了引入基于耦合变换的精确反向扩散对于生成式图像内生水印的性能提升,实验结果表明,内生水印可以在生成图像中嵌入不可见水印,嵌入的水印可通过精确反向扩散被准确提取,并具有一定的稳健性。

正交实验法优化东京樱花叶片总黄酮提取工艺研究

本项研究以东京樱花叶为研究对象,通过单因素实验及正交试验法设计四因素三水平实验,考察提取时间、温度、料液比和浸提浓度4种因素对总黄酮提取率的影响。本项实验结果表明东京樱花叶片内总黄酮提取的最佳工艺条件提取时间为50 min,提取温度为70℃,料液比为1:50,乙醇质量分数为50%。选择在此优化条件下进行3组重复验证实验,总黄酮提取率可达到14.37%,并具有良好的检测准确性与重现性。