基于ERP企业经营沙盘模拟实训的教学探索与实践

ERP企业经营沙盘模拟实训教学是体验式全新教学方式;从课程内容、课程特色、实施过程、实施收获、存在问题,让学生学到经营管理知识,掌握经营管理技巧,感受到经营管理真谛。     

化学分析法测定ABC干粉灭火剂中磷酸铵盐含量的影响因素

ABC干粉灭火剂的主要成分是磷酸二氢铵。笔者介绍了化学分析法测定干粉灭火剂中磷酸二氢铵含量的原理,并根据试验的各个步骤,从实际操作的角度分析了五个对检验结果产生影响的因素,并提出了解决办法。     

依托ERP沙盘实训平台开展大学生创业教育

ERP沙盘实训是根据管理学科特点建立起来的以学生为主体的新型教学模式,它利用虚拟的市场环境考验学生融汇贯通各种知识的能力,既注重培养学生的专业素质,更重视学生的创新意识的开发,从而激发学生的创业潜能。文章旨在通过分析ERP沙盘实训教学中的创新创业内涵,试图把它与大学生创业教育相结合,或将开启素质教育新思路。     

长江扬中江段采沙对水生生物的影响

简要介绍了长江干流扬中江段的河道状况,说明了长江下游江段的水生生物种类,分析了河道采沙对局部水环境和水生生物的影响,提出了相应的保护对策和措施.     

土工格栅砂砾垫层在软弱地基路基加宽段的应用设计

在软弱地基地段既有路基拓宽改造工程中,土工格栅复合砂垫层能够有效地加强新帮填路基与既有路基的整体性,提高地基的承栽力和解决新旧路基的不均匀沉降,具有一定的实际应用效果和进一步推广的价值.     

油砂干馏热解实验研究

油砂为非常规油气资源,其开发利用战略意义重大。采用外热式管式炉干馏试验装置进行实验。通过干馏实验获取油砂中的油气,经冷凝回收气、液产品,配合铝甑及工业分析进行对比分析。获取油砂干馏的升温曲线、升温速率,油砂油收率及硫的分布及形态。为验证干馏工艺的适用性,完善适合的干馏加工路线及各种干馏参数提供实验室支持,对后继的工业化生产摸索经验和数据资料储备。实验结论表明干馏工艺适合油砂制油,油砂油凝点较低,瓦斯热值高,550℃即达到干馏终点。同时对硫化氢的治理提出要求。     

人工挖孔桩施工中遇到的问题及其对策

针对人工挖孔桩施工中常遇到的几个问题,提出了相应的对策.     

EEPROM在砂桩固基质量检测系统中的应用

叙述了系统EEPROM在一种质量检测装置中的应用，提出了解决EEPROM由于存储数据量大、读写频繁而导致的器件使用寿命问题的方法，提高了系统的可靠性和抗干扰能力。     

An Inorganic Magnesium-based Consolidant for the Consolidation of Silica Sand (A Substitute for Weathered Sandstone): A Preliminary Exploration

ABSTRACT

Sandstone is a common sedimentary rock that is easily carved due to its weakly cemented fine grains and relatively low strength. Therefore, numerous large-scale grottoes in China are made of sandstone. However, these sandstone cultural heritage structures are often seriously damaged due to temperature and humidity changes, air pollution, biodeterioration, and repeated dissolution and crystallization of soluble salts. In general, it is imperative that a consolidant capable of providing cohesion by infilling pores between the stone grains is synthesized. In recent years, it has been reported that using organic consolidation materials for sandstone protection comes with various negative effects, such as a short lifetime, poor compatibility, and preservation damage. Using inorganic consolidation materials to protect sandstone seems to be one of the research trends for the future. Herein, this paper introduces a permeable, inorganic magnesium-based material (MMH solution) for silica sand consolidation. To assess this consolidant, the paper investigates the influence of varying molar ratios of MgO:MgCl₂·6H₂O:H₂O on properties such as penetration depth, consolidation weight, colour variation, and compressive strength. The results demonstrate that the molar ratios of MgO:MgCl₂·6H₂O:H₂O can significantly affect the consolidation performance. Additionally, it is believed that the MMH solution of MgO:MgCl₂·6H₂O:H₂O?=?5:1:16 can be successfully used for the consolidation of silica sand, as the cubic specimens’ surface micrographs show good compatibility between the consolidation product and sand grains. Experiments (i.e. weight loss rate and mineralogical compositions analysis) are performed to evaluate the cubic specimens’ water resistance properties after being immersed in water. Furthermore, the consolidation material’s failure mechanism as a self-sacrificing material is preliminarily analyzed. Results indicate that MMH solution is a promising conservation material that shows great potential for consolidating severely weathered sandstone.     

多泥沙河流水电站水轮机的抗磨蚀防护技术

由于水轮机磨损的预防和修复技术关系到电站的安全运行和经济效率,所以越来越多的受到了人们的重视。本文主要说明了水轮机磨蚀的机理和主要部位,总结分析我国水轮机磨蚀预防和修复存在的问题以及较为成熟的技术,详细介绍了两种效果较好的抗磨涂层的实际应用情况,并提出优化运行抗磨措施。