矿山企业实施ERP系统方案研究

矿山企业要提高竞争力，企业的信息化建设是必由之路。企业资源计划(ERP)结合了先进管理思想与尖端信息技术，为企业的信息化建设及管理模式的转变提供了全面集成的解决方案。本文提出了矿山企业ERP的体系结构和应用框架，讨论了开发矿山企业ERP软件中的关键技术，为矿山企业实施ERP提供了有益的思路。     

低压配电系统保护线截面的选择

介绍了低压配电系统保护线截面选择的主要要求，并就简化保护线截面选择问题提出了建议。     

增强企业核心竞争能力分析

本文探讨了企业核心能力的理论渊源,分析了在知识经济条件下企业核心能力的生成和构成以及创新。     

粉煤灰-酒糟混合基质的植物生长试验研究

利用粉煤灰和酒糟的理化特性,将二者按照一定比例配成混合基质,通过白花三叶草的盆栽试验,分析种植前后混合基质的理化特性及三叶草的生长情况,并检测基质和植株中的重金属含量.结果表明:当粉煤灰与酒糟的质量比为4:1时,基质最适合三叶草的生长,而且基质和植株体内的重金属含量均未超出国家标准.因此,可以将该基质作为矿区塌陷地的复垦基质.     

第15届国际选煤大会综述

国际选煤大会是全球煤炭界的重要会议，是国际选煤界最具权威性、最具影响力的专业盛会。目前，已有16个国家成为国际选煤大会组织的成员，中国于1972年加入国际选煤大会组织。2006年10月17日到19日召开的第15届国际选煤大会由中国煤炭工业协会和中国国际贸易促进委员会煤炭行业分会（商会）共同举办，主题为“煤炭洗选产业的发展和环保”。中国煤炭工业协会会长、中国工程院院士范维唐致欢迎辞，中国煤炭工业协会第一副会长、煤炭贸促会会长濮洪九主持了开幕式并参加了闭幕式。国家科技部、国有资产监督管理委员会和国家发展改革委员会的有关领导参加了会议，并做重要讲话。     

某型自动榴弹发射器身管铬层厚度研究

为解决某型35 mm自动榴弹发射器身管铬层设计存在合格率低和生产成本高的问题,对其身管铬层厚度进行研究。找出身管铬层厚度设计的缺陷,对其进行深入分析,提出将身管铬层厚度进行调整的方法,并以大量试验进行验证。结果表明:该方法既能缩短生产时间,降低镀铬溶液、水、电、气等物质消耗和生产成本,还能提高生产效率以及产品的合格率。     

Fish-scale-like nano-porous membrane based on zeolite nanosheets for long stable zinc-based flow battery

Zinc-based flow batteries receive widespread attention due to their advantages of low cost and high energy density. However, zinc dendrites are easy to appear during the charge process, pierce the membrane and thus destroy the battery, which seriously restrict its further development. In this article, MFI-type zeolite nanosheets (ns-MFIs) with high mechanical strength and hydrophobicity are in situ introduced to porous polymer membranes, which spontaneously form turnup fish-scale-like structure through the one-step phase inversion/surface segregation process. This special structure well disperses mechanical energy to provide effective protection characteristics to resist the penetration of zinc dendrites, and meanwhile promotes the uniform zinc depositions on the electrode by alleviating the water migration and accelerating zincate ion diffusion, so as to prolong the cycle life of the battery for more than 600 cycles, which is 4 times and 2.5 times longer than the commercial Nafion 212 and pristine porous polymer membrane, respectively. Moreover, the sub-nano size pores and high-aspect-ratio of ns-MFIs afford membranes extra ion sieving ability and transport area for the charging-balancing ions OH⁻ to ensure superior battery performance, delivering an average coulombic efficiency (CE) of ~98.5%, voltage efficiency (VE) of ~83.2%, and energy efficiency (EE) of ~81.9% at 80 mA/cm².     

Tuning stoichiometry of high-entropy oxides for tailorable thermal expansion coefficients and low thermal conductivity

Thermal barrier coating materials with proper thermal expansion coefficient (TEC), low thermal conductivity, and good high-temperature stability are of great significance for their applications in next-generation turbine engines. Herein, we report a new class of high-entropy (La_0.2Sm_0.2Er_0.2Yb_0.2Y_0.2)₂Ce_xO_3+2x with different Ce⁴⁺ contents synthesized by a solid-state reaction method. They exhibit different crystal structures at different Ce⁴⁺ content, including a bixbyite single phase without Ce⁴⁺ doping (x = 0), bixbyite-fluorite dual-phase in the RE₂O₃-rich region (0 < x < 2), and fluorite single phase in the stoichiometric (x = 2) and CeO₂-rich region (x > 2). The high-entropy (La_0.2Sm_0.2Er_0.2Yb_0.2Y_0.2)₂Ce_xO_3+2x exhibit tailorable TECs at a large range of 9.04 × 10^–6–13.12 × 10^–6 °C^–1 and engineered low thermal conductivity of 1.79–2.63 W·m^–1·K^–1. They also possess good sintering resistance and high-temperature phase stability. These results reveal that the high-entropy (La_0.2Sm_0.2Er_0.2Yb_0.2Y_0.2)₂Ce_xO_3+2x are promising candidates for thermal barrier coating materials as well as thermally insulating materials and refractories.     

大丝束CF/EP汽车地板VARTM模拟与高温力学性能

汽车轻量化是全球面临的共同问题,采用更具成本优势的大丝束碳纤维（CF）增强复合材料是实现汽车轻量化结构化的重要途径。然而,大丝束碳纤维在液体成型时,单束过多的纤维丝易导致纤维束内微观浸润困难,易产生干斑、气泡等缺陷。同时,传统的汽车电泳烘干工艺对复合材料的高温性能提出了挑战。鉴于此,本文采用0°/90°双轴向缝编大丝束碳纤布和耐高温环氧树脂（EP）,开展了纤维渗透率测试和汽车地板真空辅助树脂传递成型（VARTM）模拟优化研究,设计、制造了成型模具,成功试制出汽车地板样件,超景深显微镜观测显示纤维束内和层间浸润良好,无明显缺陷。高温在线拉伸和应变测试显示,温度对材料拉伸模量影响显著而对强度影响不大,180℃高温下应变恢复能力良好,表明该材料在高温下仍具备较好的强度和抗蠕变性能,该结果对指导复合材料能否通过传统汽车的电泳烘干工艺具有重要意义。     

添加浮选镁砂颗粒和Al2O3细粉对方镁石-尖晶石砖性能的影响

以烧结镁砂、浮选镁砂、电熔镁铝尖晶石和煅烧Al₂O₃细粉为主要原料,以木质素磺酸钙为结合剂,经混练、成型、1 650℃烧成制备了方镁石-尖晶石砖,主要研究了以浮选镁砂颗粒替代普通烧结镁砂颗粒以及在此基础上外加不同量煅烧Al₂O₃细粉（质量分数分别为0、3%和5%）对方镁石-尖晶石砖性能的影响。结果表明：1)以浮选镁砂颗粒替代普通烧结镁砂颗粒制备的方镁石-尖晶石砖,显气孔率和常温耐压强度降低,体积密度、抗热震性、高温强度和高温韧性提高。2)在以浮选镁砂颗粒替代普通烧结镁砂颗粒制备的方镁石-尖晶石砖中,随着煅烧Al₂O₃细粉引入量的增多,显气孔率和常温耐压强度降低,体积密度、抗热震性、高温强度和高温韧性提高。