机电产品面向拆卸回收的绿色设计结构模型的比较   总被引：2，自引：0，他引：2  

姚丽英  薛俊芳 《大同职业技术学院学报》2005,(1)

本文通过无向图、有向图和与或图三种以图论为基础的拆卸回收模型的比较,指出了各种模型存在的优缺点,为完善面向拆卸回收的绿色设计结构模型提供依据.  相似文献   

数字图书馆网络存储模式评析     

徐迈 《图书馆学研究》2006,(9):25-27

本文介绍了目前主要的存储体系结构，分析了各种体系结构的主要特点和适用环境，并对数字图书馆的存储发展趋势作了一些探讨。  相似文献   

业余条件下的丝网印刷     

黄问贵  许建平 《九江职业技术学院学报》2004,(4):16-17

直接感光丝网漏印法的技术流程介绍  相似文献   

禅宗与审美心境     

汪献平 《阜阳师范学院学报(社会科学版)》2001,(3):39-41

从审美心境角度出发,考察了禅宗中所蕴含的美学思想。认为禅定的修习方法造就了虚静专一的审美心胸,而禅悟作为一种直觉思维的审美体验,于瞬间体悟永恒,达到了一种来去自由、梵人合一的审美境界。  相似文献   

谈谈大学生口才训练的必要性和方法     

郭杏芳  饶晓明 《黄冈职业技术学院学报》2004,6(3):89-91

随着社会对人才要求的提高,口才越来越受到重视。对于大学生来说,口头表达能力的好坏,直接影响到他们的择业前景。因此,在校大学生除学好知识技能外,练就一副好口才,既是终生工作的需要,更是寻求就业机会的优势条件。口才训练的方式和途径很多,在校大学生常用的方法主要有朗读、讨论、辩论、演讲等等。  相似文献   

直接翻译还是间接翻译——从关联理论角度分析动画片《海绵宝宝》的翻译     

魏艳平 《宜春学院学报》2011,33(5):98-100,168

以美国动画片《海绵宝宝》的翻译为例,从关联理论角度出发,重点讨论了《海绵宝宝》的汉语翻译在获得最佳关联方面的成功与失败之处以及直接翻译和间接翻译的应用,从而阐述关联理论对动画片翻译的解释力。  相似文献   

Let's talk evidence – The case for combining inquiry-based and direct instruction     

《Educational Research Review》2023

Many studies investigating inquiry learning in science domains have appeared over the years. Throughout this period, inquiry learning has been regularly criticized by scholars who favor direct instruction over inquiry learning. In this vein, Zhang, Kirschner, Cobern, and Sweller (2022) recently asserted that direct instruction is overall superior to inquiry-based instruction and reproached policy makers for ignoring this fact. In the current article we reply to this assertion and the premises on which it is based. We review the evidence and argue that a more complete and correct interpretation of the literature demonstrates that inquiry-based instruction produces better overall results for acquiring conceptual knowledge than does direct instruction. We show that this conclusion holds for controlled, correlational, and program-based studies. We subsequently argue that inquiry-based and direct instruction each have their specific virtues and disadvantages and that the effectiveness of each approach depends on moderating factors such as the learning goal, the domain involved, and students' prior knowledge and other student characteristics. Furthermore, inquiry-based instruction is most effective when supplemented with guidance that can be personalized based on these moderating factors and can even involve providing direct instruction. Therefore, we posit that a combination of inquiry and direct instruction may often be the best approach to support student learning. We conclude that policy makers rightfully advocate inquiry-based instruction, particularly when students’ investigations are supplemented with direct instruction at appropriate junctures.  相似文献   

简易太阳能手机充电器的设计     

李时东 《中国科技信息》2007,(4):73-74

选择ICR1211为直流变换器件,并以它为核心设计了一款简易太阳能手机充电器。文中阐述了电路的工作原理,实物测试表明,该充电器工作稳定、可靠,使用灵活。  相似文献   

Biochemistry of Nitric Oxide     

Habib S  Ali A 《Indian journal of clinical biochemistry : IJCB》2011,26(1):3-17

Nitric oxide (NO) a free radical having both cytoprotective as well as tumor promoting agent is formed from l-arginine by converting it to l-citrulline via nitric oxide synthase enzymes. The reaction product of nitric oxide with superoxide generates potent oxidizing agent, peroxynitrite which is the main mediator of tissue and cellular injury. Peroxynitrite is reactive towards many biomolecules which includes amino acids, nucleic acid bases; metal containing compounds, etc. NO metabolites may play a key role in mediating many of the genotoxic/carcinogenic effects as DNA damage, protein or lipid modification, etc. The basic reactions of nitric oxide can be divided as direct effect of the radical where it alone plays a role in either damaging or protecting the cell milieu and an indirect effect in which the byproducts of nitric oxide formed by convergence of two independent radical generating pathways play the role in biological reactions which mainly involve oxidative and nitrosative stress. Nitric oxide is also capable of directly interacting with mitochondria through inhibition of respiration or by permeability transition. Reaction of nitric oxide with metal ions include its direct interaction with the metals or with oxo complexes thereby reducing them to lower valent state. Excessive production of nitric oxide can be studied by inhibiting the synthetic pathway of nitric oxide using both selective or specific nitric oxide synthase inhibitor or non-selective nitric oxide synthase inhibitor with respect to isoforms of nitric oxide.  相似文献   

基于DDC的锅炉温度控制系统的设计     

纪留利 《科技广场》2011,(10):72-74

本次设计主要通过带有A/D、D/A功能的数据采集模块及外围的检测与执行元件,结合试验室所提供的过程控制对象,针对双层锅炉夹套水温为被控参数,设计研究锅炉温度控制系统,完成了系统的锅炉温度控制定值控制。  相似文献