水库岩石高边坡加固设计

通过对汾河水库岩石高边坡坍塌的分析、研究，提出了岩石高边坡设计中重点研究的6个问题，阐述了水库岩石高边坡加固措施的选择，重点介绍了削坡减载、锚固、支护施工的具体做法。     

吕叔湘先生编辑学思想初探--纪念吕叔湘先生诞辰100周年

吕叔湘先生是我国著名的语言学家、语文教育家,也是著名的编辑学家.他对编辑工作十分重视.吕叔湘先生有着丰富的编辑经验.早在20世纪40年代,他就在我国现代著名的出版社开明书店从事过编辑工作;50年代以来,又长期担任我国语言学界的最权威的学术刊物<中国语文>杂志的编委和常务编委,1978年出任主编;还曾经担任我国唯一的语文方面的专业出版社语文出版社的社长.丰富的编辑经验与出众的学识,使得吕叔湘先生在编辑学方面有许多深刻的理论、观点.     

咪表停车区停车诱导系统的设计

介绍了咪表停车区停车诱导系统的构成及设计原理,指出在咪表停车区域或路段建立停车诱导系统,能合理安排必要的停车,减少驾驶员为寻找停车泊位而带来的附加交通量,为城市营造良好的交通环境.     

PLC在R22生产装置温度控制系统中的应用

在气相法生产R22的工艺中,反应器的温度是关键的参数.设计了一种基于PLC的自动控制系统,并应用于反应器的温度检测及控制.实际运行结果表明:该系统设计合理,性能可靠,控制效果良好.     

基于RADIUS协议的远程访问系统安全性分析与设计

RADIUS协议为远程访问系统提供重要的安全服务，即认证、授权和记账。在分析信息安全3个重要元素基础上，详细描述了RADIUS协议提供上述安全服务原理以及协议结构，并在此基础上设计了远程访问系统中基于RADIUS协议的安全子系统。同时通过分析RADIUS协议的优缺点，提出了增强认证机制的改进方案。     

对研究性学习的思考

研究性学习是基础教育改革的重要内容，是变革传统教育模式，甚至是变革传统教育体制的突破口．对研究性学习的理论基础是什么、如何选题、如何实施及其评价等当前正确开展的研究性学习试验迫切需要解决的问题进行了有益的探索。     

高等师范院校推广微型化学实验的探讨

微型化学实验最突出的优点是节省药品和减少环境污染。并且还可以利用生活中的废旧物资自制实验药品、简易仪器代用品。普及推广微型实验，可以促进化学教学的发展，可以对学生进行环境伦理教育，也可以为教学设备较差的山区中学、农村中学，加强化学实验教学提供方便。     

Alternative splicing and expression of the insulin-like growth factor （IGF-1） gene in osteoblasts under mechanical stretch

Insulin-like growth factor 1 (IGF-1) promotes osteoblasts differentiation and bone formation, and its expression is induced by mechanical stretch, thus IGF-1 has been considered an effector molecule that links mechanical stimulation and local tissue responses. In this study, a mechanical stretching device was designed to apply physiological level static or cyclic stretching stimulation to osteoblasts. Different isoforms of IGF-1 mRNA were amplified by RT-PCR from the cells using respective primers and these amplified products were sequenced. An iso-form of IGF-1 splicing product was found to be selectively produced by osteoblasts under stretching stimulation. This IGF-1 isoform had identical sequence with the mechano growth factor (MGF) which was originally identified in muscle cells. Regulations of the expression of the liver-type IGF (L.IGF-1) and MGF in osteoblasts under stretch stimulation were further studied using semi-quantitative RT-PCR. Stretch stimulation was found to promot the expression of IGF-1 (L.IGF-1 and MGF), and for both isoforms expression was more effectively stimulated by cyclic stretch than static stretch. MGF was detected only in osteoblasts subjected to mechanical stretch, suggesting MGF was a stretch sensitive growth factor. Expression of MGF peaked earlier than that of L.IGF-1, which was similar to their regulation in muscle and suggested similar roles of MGF and L.IGF-1 in bone as in muscle cells. The functions of MGF and LIGF-1 in osteoblasts shall be established by further experimental studies.     

优美三角仙人掌图的变形

本文给出了几个结论,且利用所得的结论可得一些不同构的优美三角仙人掌图。从而,部分回答了A.Rosa在[1]之中提出的猜想。