基于分形理论的黄河内蒙古段河势演变特征及其与凌汛灾害关联研究

寒区河道凌汛灾害河势“弯道效应”的量化评估十分重要。基于分形理论提出河道横断面-纵剖面-平面多维度河势分形维数计算方法及其物理机制，并探讨黄河内蒙古段不同维度河势演变分形特征及其与凌汛灾害的关联关系。结果表明，黄河内蒙古段不同维度河势均具有多尺度自相似分形特征，且具有多年记忆周期的长程相关性；冰坝（严重性冰塞）发生频次与河道主槽弯曲分形维数呈正相关指数型函数关系，与河相系数、深泓点高程和河段平均底坡分形维数负相关，与水深-面积分形维数正相关，总体表明冰坝灾害更易发生于主槽偏移摆动大、蜿蜒曲折、河湾发育程度高的宽浅型弯曲河道，研究成果可为凌汛期冰塞冰坝灾害易发河段诊断及预测提供重要理论依据。     

Enhanced hollow fiber membrane performance via semi-dynamic layer-by-layer polyelectrolyte inner surface deposition for nanofiltration and forward osmosis applications

The layer-by-layer (LBL) polyelectrolyte deposited membranes have drawn increasing attention in various applications due to the ease of selective layer formation and their stability and versatility. In this study, the LBL deposition was performed at the inner surface of the polyethersulfone (PES) hollow fiber substrate to form composite nanofiltration (NF) membrane. The semi-dynamic deposition procedure was adopted with the aid of syringes. The newly developed inner deposited (id-LBL) membranes were then tested in NF and forward osmosis (FO) applications and the performance were compared with outer surface deposition as well as some literature data. The id-LBL membranes could not only withstand higher operating pressure but also possess superior hardness rejection especially in high concentration mixed salt solutions (more than 95% rejection to Mg²⁺ and Ca²⁺ in a 5000 ppm total dissolved salt (TDS) mixture under 4.8 bar). As for the FO process, with only two layer deposition, the id-LBL membranes also demonstrated significant performance improvement with increased water flux (up to 70 L/m² h using 0.5 M MgCl₂ as draw solution in active layer facing draw solution configuration) and reduced salt leakage (around 0.5 g/m² h using 1 M MgCl₂ draw solution in active layer facing feed water configuration). This study suggests that for hollow fiber substrate, the inner surface is more suitable for the formation of the selective layer via LBL deposition than the outer surface.     

The influence of inner material with different average thermal conductivity on the performance of whole insulation system for liquid hydrogen on orbit storage

At present, several composite insulation systems were proposed that can be used for passive insulation systems, including foam-variable density multilayer insulation (VDMLI), aerogel-VDMLI and hollow glass microspheres (HGMs)-VDMLI. The passive insulation systems with different inner material (IM) showed different performances. However, the relationship between the average thermal conductivity of IM and the insulation performance of the whole system has rarely been investigated. It is of great significance for efficient configuration and matching of the passive insulation system. In this paper, a series of average thermal conductivity of IM were assumed to predict the insulation performance of the whole system at 20 K–300 K and high vacuum. In order to further illustrate the relationship between IM and MLI/VDMLI, the foam was replaced by the HGMs as 5 mm a unit forming a series of HGMs-foam-MLI/VDMLI insulation systems. The performance of the systems was investigated. After the foam was completely replaced by the HGMs, the performance of MLI and VDMLI systems was improved 33% and 13%, respectively. Moreover, each mode of heat transfer including solid conduction, radiation, and gas conduction for foam-MLI/VDMLI and HGMs-MLI/VDMLI insulation systems were calculated and analyzed.     

空气阻止剂NM360和氯磺化聚乙烯的协同作用对轮胎气密层气密性的影响

在轮胎气密层中使用了空气阻止剂NM360和氯磺化聚乙烯作为增强气密层性能的新材料。当NM360和氯磺化聚乙烯单独使用时,对气密层的气密性能影响不大,但是二者同时使用时,气密层的气密性大幅上升18%。因此,NM360和氯磺化聚乙烯具有协同作用,二者的协同作用可以大大增加气密层的气密性能。     

内蒙古官地冰长石—绢云母型银金矿床地质特征及找矿标志

官地银金矿床位于华北地台北缘早古生代造山带内,为一冰长石—绢云母型(低硫型)浅成低温热液矿床。矿床的形成和分布严格受火山机构及与其有关的北西向断裂构造控制,矿体赋存于闪长岩、闪长玢岩、流纹斑岩和隐爆角砾岩内,多呈脉状产出。典型蚀变有硅化、绢云母化、黄铁矿化、冰长石化、碳酸盐化、高岭土化、绿泥石化等,并围绕矿体具有一定的蚀变分带。硅化、冰长石化、隐爆角砾岩以及铁锰帽是其重要的找矿标志,为矿区及其外围找矿指明了方向。     

内蒙古烧饼沟铜多金属矿地质特征及找矿前景

通过矿床地质特征及成岩、成矿因素研究,认为海西晚期发生挤压造山产生NE向褶皱,沿褶皱轴海西晚期似斑状中细粒花岗闪长岩、石英闪长岩侵入,在与西别河组片岩的接触带内侧,形成接触破碎蚀变岩型—裂隙充填型的热液铜多金属矿床,矿区内蚀变矿化多赋存在北东向构造内。围岩蚀变较为发育,与成矿关系密切的为硅化、黄铁矿化、碳酸盐化、萤石化等。文章在以往地质成果的基础上,通过成矿地质背景、矿区地质概况和矿床地质特征的阐述,着重对成矿控制因素、矿床成因及找矿标志进行分析,认为该区具有较好的成矿地质条件和找矿前景。     

德国现代建筑运动中的中国学者

李承宽先生的一生是伴随着德国现代建筑运动发展的一生，与他同行，我们身临其境地认识了H．波尔兹克。E．门德尔松和德国的“表现主义建筑”；认识了H．夏隆。H．黑林与德国的“精神建构”和“有机建靠”；认识了“虚质核心”的“李空间”；我们通过他可以对德国现代建筑思想的源流和德国现代建筑运动的发展窥见一斑。他代表了中国留学者在海外奋斗的一生和由他们所带来的优秀中国文化在推动世界现代运动中所作出的贡献。     

内蒙古典型草原区传统村落景观基因 解析与特征研究

立足于“十四五”全面推进乡村振兴的时代背景，聚焦内蒙古典型草原区传统村落景观，以文化地理学“景观-基因”理论为基础，基于内蒙古典型草原区传统村落景观具有人工营建与草原环境相协调的核心价值，提出了“时间-空间-文化”三维耦合的景观基因识别、提取方法，解译出“逐水草居、农牧结合、聚散有致、内生植入、崇尚自然、天人合一、共融开放、热情豪迈”八大景观基因。从景观空间格局、景观过程、景观感知3个维度总结出内蒙古典型草原区传统村落的景观特征：景观空间格局的地域系统性、景观过程的历史演化性、景观感知的民族融合性。拓展了内蒙古典型草原区传统村落景观类型辨析和传承保护的理论视野，为内蒙古人居环境的可持续发展和乡村振兴提供科学的方法指导。     

内蒙古莫古吐铁锡矿床地质特征及成因类型

大兴安岭南段成矿带是中国北方重要的锡多金属成矿集中区,区内成矿地质条件优越,找矿潜力巨大。莫古吐铁锡矿床位于该成矿带南段,其产出位置及成矿地质特征与黄岗梁锡铁矿床具有可对比性,矿床的研究将有助于深化区内矽卡岩型矿床成因和成矿模式的认识。本文通过矿床基本地质特征及控矿因素研究,对莫古吐铁锡矿床成因进行初步分析,认为矿区内的地层、构造、岩浆岩等均有利于矽卡岩型矿床的形成,莫古吐岩体的侵位是主导矿床形成的重要因素,NE向构造是主要的容矿、导矿构造。岩体与围岩接触带及附近有利于成矿物质的富集,矽卡岩化作用与矿床形成关系密切,是控制矿体形态、规模及铁锡富集程度的主要因素,可作为本区寻找矽卡岩型矿床的主要标志。综合分析认为,莫古吐矿床属于典型的与酸性岩浆有关的矽卡岩型铁锡矿床。     

中国企业参与蒙古国矿业投资的机遇与风险

蒙古国矿产资源丰富,是中国企业走出去参与国际矿业开发投资的重要国家之一。但是,由于蒙古国外交平衡战略、投资和法律法规等政策多变、矿业市场竞争激烈、开发投资成本提高等因素制约,中蒙矿产资源开发合作时常受阻。随着蒙古国矿业投资相关法律法规的不断完善,特别是中蒙关系提升为全面战略伙伴关系,中蒙合作开发矿产资源进入历史最好的合作发展时期。中国企业应抓住机遇,坚持互利共赢原则,重视环保,惠及民生,承担社会责任,积极参与蒙古国矿业投资开发。