固体酒精最佳投料比的研究

通过加料形态、次序、反应温度的对比实验 ,得出固体酒精最佳投料比和实验条件     

Achievement-oriented beliefs and their relation to academic expectations and school achievement among Qatari students

This study investigated the relation between motivational goals and university intentions, school valuing and school achievement. The premise of this study is that motivational goals play a key role in academic values and achievement. Confirmatory factor analysis was conducted to establish the construct validity of the motivational measures drawn from the Inventory of School Motivation (ISM): mastery (effort and task), performance (competition and social power), social solidarity (social concern and affiliation), extrinsic (praise and token). A set of eight regression analyses was conducted to examine the relations among these eight motivational measures, future goals to attend college, the value of school and six school subjects. Eight regression equations revealed that effort and task were the most significant predictors of the dependent variables of university intention, valuing school and school achievement scores. Students in Qatar exhibited ‘effort and task’ in goal motivation in relation to students’ beliefs regarding future academic goals and achievement scores in school subjects. As Qatar is a highly gender-segregated society, analyses were also conducted by gender.     

VMI环境下多产品分销系统的利润模型与算法

为了进一步提高分销系统的运作效率,针对带资源约束的多产品分销网络,研究了供应商管理库存（VMI）环境下的库存与补货问题。建立了各零售商处采用周期盘点库存控制策略时分销系统的利润模型,并设计了相应的求解算法。以一个数值算例验证了模型的有效性和实用性,结果表明：供应商及各零售商的利润对补货周期的反应是不灵敏的,同时,供应商可通过调整各零售商处的最高库存资金占用上限以使供应商与零售商的最优决策保持一致。     

商洛学院图书馆图书清点方式比较研究

对账和盘点是当前图书馆清点工作较为常见的两种方式,本研究在对商洛学院图书馆清点实例的分析的基础上,对这两种方式的优劣进行了比对。研究结果显示,盘点方式检查错误的准确性和总体工作进度都优于对账方式,在今后的图书清点中应结合本馆实际,坚持并完善这一方法,以期进一步提高清点工作的实效。     

应用资产管理软件开展高校仪器设备资产清查与长效管理

长期以来,由于管理意识淡薄,制度不健全等多种因素导致高校资产管理存在账物不符,大量资产闲置、使用率低等现象。结合实际,借助信息化手段开展新一轮的仪器设备类资产清查,并在清查完成后,建设基于"Web"版仪器设备管理系统平台的资产长效管理与清查制度,使固定资产的静态管理向动态管理转变,逐步达到固定资产管理的科学化、规范化和快速高效的要求,实现仪器设备的合理配置、物尽其用。     

两阶段库存问题的最优补货策略

主要研究带有普通供应商和紧急供应商的两阶段库存问题的补货阀值问题.即根据运行周期中第一阶段结束后的剩余库存量,确定下一阶段调用哪种供应商进行供货以及补货阀值来使零售商取得最大的收益.通过利润函数性质分析确定两种供应商供货时分别的补货阀值,并建立了简单的算法来决策调用哪种供应商.最后给出仿真模拟实验,确定不同剩余量的不同补货策略.     

企业管理模式——零库存管理

企业的零库存将被看成是企业降低成本,完善物流的重要标志之一。现今,已有更多的企业向着零库存的管理模式做着更多的努力。并且,只有当企业倡导并实现了零库存的管理模式,才意味着会有更多的企业资源进行更彻底的整合。     

数学建模思想方法融入高等数学课堂的教学实例

高等数学课程是工科大学生的数学类主干课程,它的学习好坏直接影响到工科学生后续数学课程的学习效果。为了提高高等数学课程的教学效果,可尝试将数学建模思想方法融入到高等数学的实际教学过程中。以一类变质性物品的生产—库存问题为例,以数学建模思想方法为指导,应用高等数学知识去解决应用实例,对于强化学以致用的目的、培养学生的创新意识和创新能力有很大的启发性。     

高职院校大学生心理健康状况调查研究

以兰州石化职业技术学院508名大学生为研究对象,以大学生人格问卷（UPI）为研究工具,调查研究大学生心理健康状况,为高职院校心理健康教育工作提供理论依据。结果表明：第一类有明显心理问题的学生占1.2%左右,第二类有一般心理问题的学生占4.33%,第三类无显著心理问题的学生占94.47%;女生的严重程度明显的高于男生,男生的人数多于女生;大学生心理问题主要表现为人际关系不良、情绪和意志问题、自信心缺乏、性生理心理问题,而不幸的家庭和过去、失眠和对事情的兴趣程度也是大学生心理问题的衡量指标。     

Computer science concept inventories: past and future

Concept Inventories (CIs) are assessments designed to measure student learning of core concepts. CIs have become well known for their major impact on pedagogical techniques in other sciences, especially physics. Presently, there are no widely used, validated CIs for computer science. However, considerable groundwork has been performed in the form of identifying core concepts, analyzing student misconceptions, and developing CI assessment questions. Although much of the work has been focused on CS1 and a CI has been developed for digital logic, some preliminary work on CIs is underway for other courses. This literature review examines CI work in other STEM disciplines, discusses the preliminary development of CIs in computer science, and outlines related research in computer science education that contributes to CI development.