鄂尔多斯盆地长7段致密砂岩二元孔隙结构及分形特征

致密砂岩的孔隙结构特征对致密油藏的勘探和开发具有重要意义。但对不同类型孔隙渗流特征及其影响因素认识不清,制约了对致密砂岩渗流能力和储集能力的认识,并影响了致密油藏有利区的评价和预测。为此,以鄂尔多斯盆地长7段致密砂岩为例,利用铸体薄片、扫描电镜、核磁共振、分形理论研究了致密砂岩的孔隙结构特征。结果表明:致密砂岩孔隙结构是一个由束缚孔隙和可动孔隙组成的二元孔隙系统,不同类型孔隙的形态特征和连通性不同。束缚孔隙主要由晶间孔组成,孔隙模型为黏土矿物堆积的包络面,孔隙半径小,连通性差,赋存在其中的流体流通性差。该孔隙形状规则,非均质性弱,分形维数低,平均值为1.3063。可动孔隙主要是联合孔隙,形状为刺球状,孔隙半径大,由溶蚀作用形成多个连接通道,因此连通性强。可动孔隙形状不规则,非均质性强,分形维数大,平均值为3.2416。不同类型孔隙对物性的影响也不相同。束缚孔隙对孔隙度贡献平均值为47.7%,可动孔隙对孔隙度贡献平均值为52.3%,两类型孔隙对孔隙度影响相近。但受连通性差异影响,束缚孔隙对渗透率贡献度平均值为0.2%,可动孔隙对渗透率贡献度平均值为99.8%。可动孔隙是影响致密砂岩渗透率的主要因素。利用分形维数可以很好地表征致密砂岩孔隙结构。以组合孔隙为主且位于烃源岩附近的致密砂岩是勘探开发的有利区域。

民族地区高校服装设计专业采风课程教学实践探索——以广西艺术学院服装设计专业为例

实践教学是高校教学的重要组成部分,服装设计专业的采风教学,对培养学生创新精神和提高实践能力有着重要作用。作为地处民族地区的高校如何将采风课程与非遗文化传承相结合,深化教学改革,促进课程建设和学科发展,打造一门以培养学生综合素养和创意设计能力的特色课程,进而达到创新设计思维、推进地方文化发展与传承的目的,是一项值得研究的课题。文章通过广西艺术学院服装设计专业近三年来将非遗服饰文化融入采风课程的教学实践探索经验整理成文,为非遗进课程的教学改革提供有效经验。

郑州北龙湖湿地公园花境景观综合评价

为构建适宜郑州地区的花境景观评价体系,探索郑州地区优秀花境营建模式,以郑州北龙湖湿地公园内54个花境景观为研究对象,采用层次分析法,从生态性、观赏性、主观感知和经济性4个方面构建花境评价指标体系,提出14个花境景观综合评价指标。研究结果表明,54个花境样地中共有植物320种,涉及80科;4个评价准则所占权重从高至低依次为生态性(0.343 2)>主观感知(0.280 2)>观赏性(0.277 4)>经济性(0.099 1);公园花境总体质量较好,共有5个花境景观的建设水平处于Ⅰ级。探索了5个Ⅰ级花境景观构建模式并给出优化意见。

Ocular surface in patients with different degrees of myopia

AIM:To investigate the clinical features of the ocular surface in patients with different degrees of myopia.METHODS:A cross-sectional study was conducted involving 122 participants with myopia in Beijing Tongren Hospital from February to June,2023.After completing the Ocular Surface Disease Index(OSDI)score scale,measurements were taken for refraction,biometric parameters and ocular surface parameters.The prevalence,severity and related parameters of the dry eye among different groups based on axial length(AL)were compared.Correlation analysis was performed between ocular surface parameters and refraction/biometric measurement parameters.RESULTS:Statistically significant differences were observed in refractive error,corneal thickness,anterior chamber depth,and subfoveal choroidal thickness among the groups(all P<0.05).With the increase in AL,the incidence and severity of dry eye increased significantly(P<0.05).Moreover,the tear film break-up time(BUT)shortened(P<0.05),and the corneal fluorescein staining(CFS)points increased significantly(P<0.05).OSDI scores were positively correlated with AL and spherical equivalent(SE;both P<0.05);BUT was negatively correlated with AL,SE,and corneal astigmatism(AST;all P<0.05);Schirmer I test(SIT)results were negatively correlated with AL and SE(both P<0.05).CONCLUSION:AL elongation is a risk factor for dry eye onset in myopic participants.The longer the AL,the more severe the dry eye is,with the increased CFS spots and tear film instability.Additionally,SE and AST exhibit negative correlations with dry eye symptom scores and ocular surface parameters.

Predictive value of positive lymph node ratio in patients with locally advanced gastric remnant cancer

BACKGROUND Traditional lymph node stage(N stage)has limitations in advanced gastric remnant cancer(GRC)patients;therefore,establishing a new predictive stage is necessary.AIM To explore the predictive value of positive lymph node ratio(LNR)according to clinicopathological characteristics and prognosis of locally advanced GRC.METHODS Seventy-four patients who underwent radical gastrectomy and lymphadenectomy for locally advanced GRC were retrospectively reviewed.The relationship between LNR and clinicopathological characteristics was analyzed.The survival analysis was performed using Kaplan-Meier survival curves and Cox regression model.RESULTS Number of metastatic LNs,tumor diameter,depth of tumor invasion,Borrmann type,serum tumor biomarkers,and tumor-node-metastasis(TNM)stage were correlated with LNR stage and N stage.Univariate analysis revealed that the factors affecting survival included tumor diameter,anemia,serum tumor biomarkers,vascular or neural invasion,combined resection,LNR stage,N stage,and TNM stage(all P<0.05).The median survival time for those with LNR0,LNR1,LNR2 and LNR3 stage were 61,31,23 and 17 mo,respectively,and the differences were significant(P=0.000).Anemia,tumor biomarkers and LNR stage were independent prognostic factors for survival in multivariable analysis(all P<0.05).CONCLUSION The new LNR stage is uniquely based on number of metastatic LNs,with significant prognostic value for locally advanced GRC,and could better differentiate overall survival,compared with N stage.

Research on the origin and evolution of technical management regulations for railway

Purpose–To facilitate technical managers and field workers to master and understand the provisions of Technical Management Regulations for Railway more accurately,so as to better serve the comprehensive revision of the Regulations,this paper carries out the research on the traceability and evolution of the provisions of the Regulations.Design/methodology/approach–This paper studies and analyzes the evolution of the 11th edition of the Regulations by analyzing the relevance of clauses and summarizes the historical background of the development of calendar editions of the Regulations.The basic research on the traceability and evolution of the Regulations is carried out from four aspects:the continuity of the development of the Regulations,the authority of contents,the relevance of clauses and the richness of historical materials.Findings–From the first edition of the Regulations issued by the former Ministry of Railways in 1950 to the 11th edition,there have been ten comprehensive revisions.There is a strong correlation and continuity between the calendar editions of the Regulations in terms of chapter structure and clauses.Studying the context of the terms of the Regulations is an important way to understand and master the current clauses of the Regulations.Originality/value–Through the research on the traceability and evolution of the clauses of the Regulations,one is to explore the context of the development of railway technical equipment in China,the other is to clarify the historical background when the provisions were formulated and the third is to trace the development and evolution of the provisions.The revision of the Regulations is based on an accurate grasp of the context of the provisions,which can effectively judge the possible security risks caused by the revision of the provisions and avoid the possible risks in field implementation from the source.

Removal Effect of Precipitation on Atmospheric Particulate Matter (PM_(2.5) ) in Bengbu City

Based on the monitoring data of PM_(2.5) concentration in Bengbu Environmental Monitoring Station and precipitation observation data of Bengbu National Meteorological Observation Station from 2016 to 2019, the influence of precipitation on PM_(2.5) mass concentration in Bengbu City was analyzed. The results show that precipitation had a washing and removal effect on PM_(2.5) in the air, and the removal effect was related to precipitation level, precipitation intensity, precipitation duration and PM_(2.5) concentration. The removal effect of precipitation on PM_(2.5) increased with the increase of precipitation level, and the seasonal difference was obvious. Precipitation intensity was positively correlated with the removal effect of PM_(2.5) , but the average removal rate began to decline when precipitation intensity exceeded 10 mm. With the increase of precipitation intensity, the proportion of positive removal showed an overall upward trend, but there was a low-value area as precipitation intensity was 3-10 mm. Precipitation duration was also positively correlated with the removal effect of PM_(2.5) , and there was a low-value area when precipitation duration was 10-15 h. When PM_(2.5) concentration was low before the precipitation process began, the removal effect was not good, and the average removal rate was negative. As PM_(2.5) concentration was high before the precipitation process started, the removal effect was obvious.

Changing Characteristics of Comfort Index of Human Body in Bengbu City in the Past 40 Years under the Background of Climate Change

Based on the daily meteorological data of Bengbu City during 1981-2020,the changing characteristics of three elements needed for the calculation of the comfort index of human body(CIHB)were discussed,and daily CIHB was classified and discussed.The results show that from 1981 to 2020,annual average temperature tended to increase significantly.Annual average wind speed and relative humidity showed a decreasing trend before 2011 but an increasing trend after 2011.The duration of the four seasons in Bengbu City mainly rose in spring,reduced in winter,declined first and then increased in summer,and rose first and then decreased in autumn.As CIHB was at grades 1 and 9(the most uncomfortable),the three factors had different effects on them.For cold weather,the influence of relative humidity and wind speed on CIHB can not be ignored besides temperature.In hot weather,the influence of temperature was dominant,and the change of annual average temperature could well correspond to the change in the number of very hot days.In the context of climate warming,the number of cold days tended to decline generally,but it was larger in the years with fewer very cold days.Under the background of climate warming,there was no obvious change in the number of days of the overall comfort of human body.The number of hot days was closely related to the duration of summer,and the number of days of grade 8 rose significantly in the years with an increase in the duration of summer.

泰康(南京)国际医学中心

泰康(南京)国际医学中心项目,是泰康保险集团联合南京鼓楼医院,引进国际顶级医疗资源,打造的一个集医、教、研为一体的国际化大型综合医学中心,是南京市栖霞区的市级重大民生配套工程。项目选址于南京仙林核心生态区灵山余脉之间,群山环抱之中。基地北侧为灵山北路,紧邻仙林大道;西侧为学子路南延规划道路。场地为丘陵坡地,地势东高西低、南高北低,高差达20m。建设内容包括核心医学中心(1#、2#、3#子项)、配套停车楼(4#子项)、污水处理站、库房、风雨连廊等配套用房(5#、6#、7#子项)。

不同切丝宽度中支卷烟的包灰性能、主流烟气及感官质量变化规律

为探索切丝宽度对中支卷烟卷接质量、包灰性能、烟气指标及感官质量的影响,在其他制丝和卷制条件相同时,分别按0.80、0.90、1.00、1.10 mm的切丝宽度制丝并卷制烟支,分析切丝宽度对卷烟理化指标及感官质量的影响。结果表明,随切丝宽度从0.80 mm增加至1.10 mm,整丝率从86.89%逐步增加至91.40%,短丝率和碎丝率均逐渐减小,且长丝率、整丝率及短丝率与切丝宽度间存在显著相关性。不同切丝宽度卷烟卷制稳定性整体较好,封闭吸阻及其标准偏差随切丝宽度增加呈现减小趋势,切丝宽度为1.00 mm时,端部落丝量、燃烧锥落头倾向及烟丝轴向密度的标准偏差相对较低;通过逐步回归分析法建立了烟丝结构与物理指标间的关系模型,长丝率与端部落丝量和含末率呈负相关,中丝率与轴向密度标准偏差呈负相关,短丝率与总通风率标准偏差呈负相关,并与落头倾向呈正相关关系。切丝宽度对包灰值、灰度值和碳化圈宽度有极显著影响,切丝宽度为1.00 mm时,包灰值和碳化圈宽度最小,分别为2.40%和12.36%。切丝宽度与抽吸口数和焦油释放量呈显著或极显著相关关系,其中与抽吸口数呈正相关关系,与焦油释放量呈负相关关系。感官评吸结果表明,1.00 mm切丝宽度时中支卷烟的感官质量最优。

“三全育人”背景下高职学生网络素养培育路径

随着信息技术发展速度的日益加快,网络已不仅仅是人们获取信息的工具,也逐渐成为了人们生产生活的重要场域。在“三全育人”导向下,提升高职学生网络素养培育效果不仅是学生个体实现全面发展的需要,更是推进网络强国建设的现实需要。在网络强国目标的指引下,高职院校要站稳“立德树人”主阵地,积极构建高校“大德育”育人格局,着力提升高职学生网络素养,构筑文明网络环境,助力网络强国建设。

叙事顺序对知识可视化设计传播效果的影响

在互联网技术飞速发展的背景下,信息过载、信息不易解读、信息不对称等新的社会问题逐渐出现,知识可视化成为解决上述问题的重要工具。知识的高质量传播离不开对知识可视化设计中叙事性的理解和把握,而在叙事过程中叙事顺序对于受众理解和把握信息起着非常重要的作用。本文通过对叙事顺序相关研究的回顾,提出单线型、复线型等7种知识可视化设计的叙事顺序类型,并对单线型、复线型、AB选择型3种典型表现及应用进行讨论,得出合适的叙事顺序干预有助于提升知识可视化设计的传播效果的结论,也为今后知识可视化设计过程中的决策提供了一定的思考视角和借鉴意义。

基于研究性学习的设计型学习能力培养模式研究

设计型学习作为培养人才的有效方式而广泛实践,但长久以来教育者对它的关注大多集中在解决一个具体的设计问题或完成一个主题设计,而关于它具体要培养学生哪些能力,往往被大家所忽略。本文在梳理研究性学习的发展历程与经验方法的基础上,厘清设计型学习的教学流程与环节,从教师活动、学生活动和能力培养三个层面出发,构建了一个由“探究分析”“设计迭代”两个循环组成的设计型学习的能力培养模式,明确了设计教育的培养目标以及各环节的能力架构。同时,参考具体教学案例进行深入分析,对后续开展教学提供了参考。

郑州北龙湖湿地公园花境植物应用研究

随着园林绿化的快速发展,花境园在园林中的应用越来越广泛。以北龙湖湿地公园54个花境园为研究对象,对该区域花境植物种类、使用频次、应用情况以及花境色彩等方面进行研究。研究表明,花镜植物共80科、213属、320种,优势科为菊科、禾本科、唇形科、蔷薇科、百合科、马鞭草科、玄参科;花镜园中使用植物主要以多年生草本为主,其次是灌木,使用频次较高的植物为亮晶女贞和松果菊;花镜整体以紫色系植物居多,其次是黄色系、红色系植物。结合北龙湖花境植物的分析研究,对花境植物优化配置以及花境材料的选择提出相关参考。

Modulatory effects of Lactiplantibacillus plantarum on chronic metabolic diseases

The increased global incidence of chronic metabolic diseases,a vital threat to human health and a burden on our healthcare systems,includes a series of clinical metabolic syndromes such as obesity,diabetes,hypertension,and dyslipidemia.One of the well-known probiotic microorganisms,Lactiplantibacillus plantarum plays an important role in promoting human health,including inhibiting the occurrence and development of a variety of chronic metabolic diseases.The present study provides an overview of the preventive and therapeutic effects of L.plantarum on diabetes,obesity,non-alcoholic fatty liver disease,kidney stone disease,and cardiovascular diseases in animal models and human clinical trials.Ingesting L.plantarum demonstrated its ability to reduce inflammatory and oxidative stress levels by regulating the production of cytokines and short-chain fatty acids(SCFAs),the activity of antioxidant enzymes,and the balance of intestinal microbial communities to alleviate the symptoms of chronic metabolic diseases.Furthermore,updated applications and technologies of L.plantarum in food and biopharmaceutical industries are also discussed.Understanding the characteristics and functions of L.plantarum will guide the development of related probiotic products and explore the modulatory benefit of L.plantarum supplementations on the prevention and treatment of multiple chronic metabolic diseases.

Dynamic tear meniscus parameters in complete blinking:insights into dry eye assessment

AIM:To investigate the relationship between dynamic tear meniscus parameters and dry eye using an automated tear meniscus segmentation method.METHODS:The analysis of tear meniscus videos captured within 5s after a complete blink includes data from 38 participates.By processing video data,several key parameters including the average height of the tear meniscus at different lengths,the curvature of the tear meniscus’s upper boundary,and the total area of the tear meniscus in each frame were calculated.The effective values of these dynamic parameters were then linearly fitted to explore the relationship between their changing trends and dry eye disease.RESULTS:In 94.74%of the samples,the average height of central tear meniscus increased over time.Moreover,97.37%of the samples exhibited an increase in the overall tear meniscus height(TMH)and area from the nasal to temporal side.Notably,the central TMH increased at a faster rate compared to the nasal side with the temporal side showing the slowest ascent.Statistical analysis indicates that the upper boundary curvature of the whole tear meniscus as well as the tear meniscus of the nasal side(2,3,and 4 mm)aid in identifying the presence of dry eye and assessing its severity.CONCLUSION:This study contributes to the understanding of tear meniscus dynamics as potential markers for dry eye,utilizing an automated and non-invasive approach that has implications for clinical assessment.

Extensional structures of the Nan'an Basin in the rifting tip of the South China Sea: Implication for tectonic evolution of the southwestern continental margin

Nan'an Basin is a giant hydrocarbon basin,but its tectonic division scheme and associated fault systems has not been well understood.Based on newly acquired seismic data from the southwestern margin of the South China Sea,this study analyzed the structural units,tectonic feature and geodynamics of the sedimentary basin.The new data suggests that the Nan0 an Basin is a rift basin oriented in the NE-SW direction,rather than a pull-apart basin induced by strike-slip faults along the western margin.The basin is a continuation of the rifts in the southwest South China Sea since the late Cretaceous.It continued rifting until the middle Miocene,even though oceanic crust occurred in the Southwest Subbasin.However,it had no transfer surface at the end of spreading,where it was characterized by a late middle Miocene unconformity(reflector T3).The Nan'an Basin can be divided into eight structural units by a series of NE-striking faults.This study provides evidences to confirm the relative importance and interplay between regional strike-slips and orthogonal displacement during basin development and deformation.The NE-SW-striking dominant rift basin indicates that the geodynamic drivers of tectonic evolution in the western margin of the South China Sea did not have a large strike-slip mechanism.Therefore,we conclude that a large strike-slip fault system did not exist in the western margin of the South China Sea.

日本高校物流管理专业人才培养体系剖析——以日本流通经济大学为例

本文以日本流通经济大学为例,剖析了日本高校物流管理专业的人才培养体系,围绕教育目标、学位授予原则、培养方案设置原则、课程设置概况等进行了介绍和分析,最后对我国的物流管理人才培养提出了几点思考与启示,包括:应分析与国外发达地区物流管理人才培养的差距及原因、清晰定位各学历层次人员的未来就业方向、与企业共同开设实践课程、注重学生综合能力的提高、及时引入产业新技术的配套课程等。

Inflammatory cutaneous metastases originating from gastric cancer: A case report

BACKGROUND Cutaneous metastasis with gastric cancer(GC)origin is extremely rare and associated with poor prognosis.Nodular type is the most common type,while other forms are extremely rare.CASE SUMMARY This study describes severe skin redness,swelling,pain,and fever in a 65-year-old man diagnosed with GC,whose left chest wall,left upper limb,and left back were mainly affected.Firstly,the patient was diagnosed with“lymphangitis”and treated to promote lymphatic return.However,the symptoms were constantly deteriorating,and skin thickening and scattered small nodules gradually appeared.Finally,the skin biopsy confirmed cutaneous metastases,and the patient died 7 d later.CONCLUSION Our case highlights that cutaneous metastasis should be considered when skin lesions appear in patients with GC.

设计教育中学习模式的演变

设计教育是培养复合型创新人才的重要途径,在整个社会和经济发展中具有不可替代的作用。了解设计教育中学习模式的演变有助于更好地理解设计教育发展的本质。采用文献综述法回顾教育理念的发展历程,总结出不同时期代表性的教育理念及教育目标,并基于此将设计教育划分为手工艺阶段、工艺美术教育阶段和现代教育阶段几个阶段,同时深入探讨每一阶段中设计教育的特点和对应的学习模式,揭示了学习模式从师徒制到工作坊和工作室,再到设计型学习的演变路径,旨在为未来设计教育的进一步创新提供有益的启示。