行程阀控制液压顺序动作回路的压力限制条件

分析了行程阀控制液压顺序动作实现的基本方式,对采用行程闽设计的顺序动作回路,提出了压力对动作顺序的限制,并给出全行程和非全行程的压力限制条件．     

从《游玄岳记》看谭元春的山水欣赏理论

谭元春认为,欣赏山水最重要的是要抓住山水的特征,找出此山此水不同于它山它水的地方。而要抓住山水的特征,首先,欣赏山水应分清主次,有取有舍,不能巨细无遗地兼观并览;其次,欣赏山水应移步换形,不断调整观察角度;还应保持良好的精神状态和身体状态,用身心去感受自然。     

Elementary School Career Awareness: A Visit to a Hospital

A well-conceived field trip to a hospital serves several important purposes for elementary school students: (1) it acquaints students with local places of employment while demonstrating the essentiality of work and the need for employees to work together to provide valuable community services, and (2) it helps to reduce the level of anxiety children generally associate with their own hospitalization. In order for a field trip to be something more than a relatively meaningless out-of-school frill, it needs to be carefully planned and carried out. This article offers numerous practical suggestions for getting ready for the hospital visit, the tour itself, and ways to follow-up on the visit, thereby maximizing the educational value of the field trip for elementary age students.     

Report on Travel to Kosovo,April 5–13, 2003

ABSTRACT

The U.S. State Department asked the author to visit the National and University Library of Kosovo (BKUK) and participate in the first annual Library Week in Kosovo, which took place from April 7 to 12, 2003, in Prishtina. While there he met the new director of BKUK; gave two lectures; discussed interlibrary cooperation; met with the staff of the Prishtina Municipal Library and with the administration of the Academy of Arts and Sciences of Kosovo; looked at bookstores, book vendors, and minority publications; bought books and serials for LC; and visited the fourteenth-century Serbian Orthodox Monastery in Gra?anica.     

Report on Travel to Albania,September 6–12, 2004

ABSTRACT

I visited Albania from September 6 to 12, 2004 as a guest speaker of the U.S. Department of State. I gave three lectures on library use of information technology and on information resources–two at the National Library of Albania and one at the House of the Book and Communication. The lectures were in English, but the accompanying PowerPoint presentations had captions in Albanian. The 40 participants from several libraries across Albania and Kosovo knew English but were given Albanian translations as well of my lectures. I also visited the municipal library in Vlora. This report summarizes my daily activities and the three lectures during my time in Albania.     

《淡绿色的月亮》绘色艺术研究

须一瓜在《淡绿色的月亮》中运用了大量的色彩词汇,通过光影的明暗对比、点彩技法、以物代色等方式,创造出了独特意境,也形象地表现了人物的情感。同时,这样的绘色艺术还蕴含着作者对人性及生活之“真”的思考,使得小说呈现出独特的审美张力。     

大行程压力试验机的系统研制与应用

介绍了自行设计的大行程压力试验机的机械结构、工作原理、测试系统的技术方案及其在塑料检查井剪切试验与荷载试验中的应用.它能有效地解决传统压力试验机试验空间小,调整慢,试验效率低,对大试样压力测量抗偏置能力差、误差大的问题.     

中小学研学旅行课程实施评价研究

中小学研学旅行作为研究性学习与旅行体验相结合的校外活动课程,在课程实施过程中容易产生“只旅不学”或“只学不旅”的问题,构建研学旅行课程实施评价指标是解决这一问题的突破口。为此,以课程要素分析为理论框架,根据我国中小学研学旅行政策文本,从准备要素、设计要素、过程要素、结果要素和反馈要素五个维度构建中小学研学旅行课程实施评价体系,为研学旅行课程设计、实施、评价提供理论和实践参考。     

刍议我国山区铁路10kV电力贯通线的防雷措施——以九景衢铁路电力设计为例

通过分析山区铁路10 kV电力贯通线路雷击跳闸产生的原因,结合九景衢铁路电力设计提出一些合理的防雷方式,以提高送电线路耐雷水平.