油品储运实验平台的设计与实现

针对油气储运工程专业实验教学与科研的需要,设计创建了一套大型综合性油品储运实验平台。该平台综合了多门课程知识和多种先进技术手段,完全可以模拟油品储运过程中主要生产作业实现各种输送工艺,具有综合多样的实验功能。     

油罐注油蒸发损耗的实验测定

利用油品蒸发损耗及油气回收测试平台,实测了油罐不同装油速度、装油口高度和罐内气体空间初始油气浓度对油气浓度、损耗率以及气液比的变化规律.结果表明,低装油口装油时,液面上升速度为0.371～0.557 mm/s,对油气浓度影响不大;当液面上升速度为0.371～1.114 mm/s时,高装油口装油时损耗率为2.45‰～4.00‰,而低装油口装油时损耗率为1.08‰～2.09‰;当液面上升速度为0.557～1.114 mm/s时,低装油口装油时的气液比为1.13～1.30.研究结果对现实生产管理有重要的指导意义,可为降低油品蒸发损耗、减少环境污染提供依据.     

一种全自主移动机器人实验平台的设计与研究

针对机器人教学和科研的需要,开发出全自主移动机器人综合实验平台,它综合了多种先进技术和实验功能,可完成机器人机械实验、移动控制实验等多种实验.建立平台数学模型,进行了运动学分析,并对测里程法定位实验进行了详细的介绍.该平台技术先进,功能全,综合性强,更有利于锻炼和提高学生的专业技术,培养学生的综合能力和科研素质.     

油品小呼吸蒸发损耗实验装置的研制

研制了油品小呼吸蒸发损耗实验装置。实验结果表明，此装置结构紧凑、测试手段完善、操作安全方便、实验效果良好，理论计算与实际测量误差小于10%，有助于提高工作人员的理论分析能力和实践操作技能。     

储运防腐技术教学实验平台建设与开发

针对储运防腐技术实验教学与科研的需要,设计建设了一套大型综合性储运防腐技术教学实验平台,并开发出多种类型的实验项目。该平台综合运用各种先进技术,可模拟埋地油气管线阴极保护工艺系统及其运行工况、管线阴极保护参数检测、管线防腐层检测及杂散电流干扰检测等任务。该平台综合性强,贴近工程实际,更有利于锻炼和提高学生的专业技能和动手能力,有利于培养学生的综合能力和创新意识。     

导弹发射装置随动系统实验平台构建

针对教学和科研的需要,设计并实现了导弹发射装置随动系统实验平台。该实验平台技术先进,可扩展性强,便于学生自主创新,有利于培养学生的科研素质和综合能力。介绍了实验平台的硬件和软件的设计及实验项目。     

油品小呼吸蒸发损耗实验装置的研制

研制了油品小呼吸蒸发损耗实验装置。实验结果表明,此装置结构紧凑、测试手段完善、操作安全方便、实验效果良好,理论计算与实际测量误差小于10%,有助于提高工作人员的理论分析能力和实践操作技能。     

储油罐温度分布模拟研究

在石油储运过程中,石油中一部分较轻的组分常常逸人大气,发生油气蒸发损耗,造成损失。为了有效减少油罐内轻质油品的蒸发损耗,应严格控制油品温度及其变化。通过对油罐的几何特性的分析,在求解边界条件时充分考虑大气温度变化、油品初始温度以及油罐顶部对流条件等诸多影响因素的基础上,建立了轻油温度场三维非稳态热传导模型,并使用ANSYS有限元软件求解了该数学模型和对油罐内轻油温度场进行了模拟计算。以广东茂名地区某一油罐为例,设定每个季度为一个周期,模拟了该油罐一年内的轻油温度场,可以求解出在运行周期内某时刻轻油温度场的温度分布,也可以求解出油罐内任意点在整个运行周期中的温度变化情况。     

芝麻中植物油提取的加速溶剂萃取技术

使用加速溶剂萃取技术提取黑芝麻中的植物油,通过旋转蒸发法回收溶剂,采用重量分析法对实验结果进行评价,以及对黑芝麻和黑芝麻粉中植物油的含量进行比较。该实验向学生介绍了一种高效、快速、环境友好的样品前处理方法。该实验具有较好的可设计性,即可拓展为系列植物油提取实验,可作为大学本科综合及设计性分析化学实验的教学内容。     

“从烂版液中回收硫酸铜”实验的改进和研究

在大一无机化学实验中，常常开设综合设计实验"从烂版液中回收硫酸铜"（也可作为高中生的课外实验）．烂版液是在集成电路线路板的制作过程中，用酸法或碱法腐蚀线路板时产生的含铜量极高的废液．常用回收方法为：置换焙烧法制氧化钢，再经H2SO4溶解、蒸发、浓缩，结晶制CuSO4·5H2O．在实验教学中，教材要求学生自行设计，只有极简单的提示，教师按这一工艺路线写出详细操作步骤的实验讲义发给学生进行实验，其反应原理是：实施这一原理的操作简图如下：一．问题的提出和改进方案：我们认为，对这类联系实践的综合设计实验应给学生以下…     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

库克斯顿城堡

城堡, 是欧洲典型的建筑之一, 每个城堡都有一个美丽的传说或是一段历史。从本期开始, 我们将推出“城堡之旅”, 带各位读者去浏览、观赏欧洲各地的城堡, 开始一段文化与历史的旅途!     

The Reader Response Approach to Teaching of English Literature

During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context.