外界条件对溴冷机性能影响的研究

溴化锂吸收式制冷机的性能，通常指运行时所产生的冷量及与之相关的热力系数，蒸汽单耗等技术经济指标而言，分析影响溴冷机性能的各种因素，研究提高溴冷机性能，延长使用寿命的方案。     

声乐表演的二度创造--谈歌曲演唱的创作方法

从声乐表演的基本属性出发 ,阐明了歌曲声乐表演“从外到内”、再“从内到外”的分析、体验、表现作品的创作方法     

计算机处理器性能的衡量

处理器在整个计算机中占了很重要的部分,很多用户都关心处理器的性能表现如何以及怎样衡量它的性能.作者主要从两个方面介绍其性能的技术参数指标.     

校阅在CAT与FIT中对受测者行为表现与状态焦虑水平的影响

校阅(review)对CAT中受测者心理影响的研究有利于CAT的推广应用。J.Oleat等研究者在CAT(computerizedadaptivetest,计算机自适应性测验)与FIT(fixed-itemtest,固定项目测验)中,将校阅(review)对受测者行为表现与状态焦虑水平的影响作了比较研究。实验结果表明,在允许校阅的环境中,受测者正确反应与被估计的能力水平显著增加,并且状态焦虑水平下降。本文对J.Oleat等研究者的主要研究成果进行了详细的评述,并进一步探讨了在CAT中增设校阅(review)环境的重要性和可能性。     

加权IAE自校正控制器

加权最小方差自校正控制器的性能指标本质上是ＩＳＥ准则．以ＩＡＥ准则为性能指标，提出了一种新的自校正控制器——加权ＩＡＥ自校正控制器，讨论了该自校正控制器的算法实现．为了使这种自校正控制器更加完善，在它的设计中采用了极点配置的思想．计算机仿真结果表明了这一新的自校正控制器的优越性．     

议政府采购绩效审计

如何开展政府采购绩效审计,是审计机关及其审计人员亟须研究解决的一个课题。实施政府采购绩效审计,就必须从审计角度出发,就政府采购绩效审计的必要性、审计目标、审计的依据和内容进行思考。     

面向制造的板级电子电路产品多信息模型研究

Most electronics products use PCB to carry electronic circuits. This paper classifies information contained in PCB-based electronic circuits into several models: geometry model, physics model, performance model and function model. Based on this classification, a multi-information model of product is established. A composite model of product is also created based on object-orientation and characteristics of the product. The model includes a 3D geometry model, a physics model with integrated information that can be divided into microscopic and macroscopic information, a generalized performance model and a function model that are from top to bottom. Finally, a multi-unit analysis is briefly discussed.     

谈谈声乐表演专业学生的嗓音保护

透视当前嗓音保护的现象,阐述了嗓音保护的重要性,并结合教学实践,提出了一些保护嗓音的可行性方法.     

Sharing teacher knowledge at scale: teacher inquiry,learning design and the representation of teachers’ practice

Sharing teachers’ professional knowledge remains challenging. Teachers’ development often remains ad hoc or local, and attempts to scale this up have proved problematic. To address this, research in areas such as ‘learning design’ has explored the use of formal representations of practice. This proposes that educational practice can be improved by documenting, sharing and building on what teachers already do. Whilst this has led to some successes, it has not resulted in the widespread transformation of practice. This paper reviews the literature about sharing teacher knowledge. The challenges of scaling up development are then considered in relation to two theories that help explain the challenges: Communities of Practice and Sociomateriality. This analysis is illustrated through case studies in Norway and the UK. These show that teachers already create and share artefacts that represent their pedagogic knowledge. However, they found formal representations, such as learning designs, difficult to work with. The paper concludes that scaling up teacher development using abstract formalisms is unlikely to succeed. Instead, teachers value stories and the materials they already create in their day-to-day practice. It is this intermediate level of representation, between direct experience and formal abstraction, that offers the most promise for sharing practice.