高校教学实验室管理体制探析

从我国目前高校教学实验室行政管理、人员管理、设备管理等方面入手,分析现行高校教学实验室管理体制存在的问题及产生的原因。在借鉴国内外实验室先进管理经验的基础上,提出高校教学实验室管理体制改革方案。     

空心加压螺钉不同构型固定股骨颈骨折的生物力学研究

目的:用力学实验的方法,对倒、正等腰三角形布局的三枚空心加压螺钉固定头颈型股骨颈骨折进行生物力学比较,确定哪种空间构型生物力学性能好,从而为临床治疗股骨颈骨折提供理论依据.方法:用生物力学机测试比较倒、正等腰三角形空间构型抗压、抗扭性能及最大垂直载荷,实验数据用SPSS10.0统计软件进行t检验,P＜0.05有显著性差异.结果:倒等腰三角形构型在抗压、最大垂直载荷方面优于正等腰三角形组,有显著性差别;抗扭转方面无显著性差别.结论:实验结论支持治疗头颈型股骨颈骨折三枚空心加压螺钉倒等腰三角形构型生物力学效果好.     

提高高职院校大型仪器设备使用效益的重要举措

文章结合高职院校办学特点和实际情况,在分析当前高职院校大型仪器设备使用现状同时,提出通过科学化、合理化管理机制和有效途径,使大型仪器设备使用效益得到充分发挥和提高。     

基于核心素养培养的初中数学作业设计探研

作业设计是一门艺术,数学教师在进行作业布置的过程中要注意围绕培养学生核心素养展开,注重减轻学生的作业负担,提高作业布置的有效性。文章分析核心素养的重要性和作业设计现状,强调学生要注重基础知识和基础题型的掌握,教师要分层次进行作业布置,适当设计自主探究性题目,积极布置开放性的作业,切实提高学生的数学核心素养。     

浅谈当前住宅工程中的质量通病及其防治

质量通病是指在一定时期内，或一个地区、一个企业中最普遍、最经常发生的质量问题，其存在的形式不一、类型不一，产生的原因也各不相同，我们要逐一分析、查找原因，而后各方共同努力、逐个击破，力争为社会建造高质量的住宅工程     

Using Explicit Teaching of Philosophy to Promote Understanding of the Nature of Science

Adopting an explicit and reflective approach to the teaching of the history and philosophy of science is useful in promoting high school students’ understanding of the nature of science. Whereas the history of science is usually signposted clearly in the school science curriculum, the philosophy of science is considered to be embedded in and integral to science education. This article argues that philosophical topics also need to be explicitly signposted and discussed in the teaching of the nature of science in high schools. This study investigates an interdisciplinary course on the nature of science in a Chinese senior high school. The course involved explicit teaching of philosophy of science topics with subject knowledge in each lesson. This mixed method design of the research included a modified version of the Views on Science, Technology and Society questionnaire as reported by Aikenhead and Ryan (Science Education, 76(5):477?491, 1992) and phenomenographical analysis. Although the sample size is small, the results suggest that explicit teaching of philosophy of science topics helps students better understand both the nature of science and the relationship between science, technology and society.

     

Experimental study on the inhibition of biological reduction of Fe(III)EDTA in NO x absorption solution

Scrubbing of NO _x from the gas phase with Fe(II)EDTA has been shown to be highly effective. A new biological method can be used to convert NO to N₂ and regenerate the chelating agent Fe(II)EDTA for continuous NO absorption. The core of this biological regeneration is how to effectively simultaneous reduce Fe(III)EDTA and Fe(II)EDTA-NO, two mainly products in the ferrous chelate absorption solution. The biological reduction rate of Fe(III)EDTA plays a main role for the NO _x removal efficiency. In this paper, a bacterial strain identified asKlebsiella Trevisan sp. was used to demonstrate an inhibition of Fe(III)EDTA reduction in the presence of Fe(II)EDTA-NO. The competitive inhibition experiments indicted that Fe(II)EDTA-NO inhibited not only the growth rate of the iron-reduction bacterial strain but also the Fe(III)EDTA reduction rate. Cell growth rate and Fe(III)EDTA reduction rate decreased with increasing Fe(II)EDTA-NO concentration in the solution. Project (No. 20176052) supported by the National Natural Science Foundation of China and the Scientific Research Foundation for Returned Overseas Chinese Scholars, Ministry of Education     

二十世纪古代小说书目编撰史述略--兼论有关书目体例的几个问题

小说书目的编撰具有献学性质，但它同时又是小说学的一部分，与小说作、成书、版本以及类型等等研究息息相关。孙楷第《中国通俗小说书目》以20世纪前期的通俗小说研究为其学术基础，其后80、90年代出现的通俗小说书目和言小说书目也程度不同的吸纳了当时小说研究的成果，同时叉为小说研究提供了重要的工具。但是20世纪的小说书目作仍存在着明显的不足，将言小说和白话小说融通一体，对于版本录的完备性和精确性，以及小说类型的界定等等，都是需要努力解决的问题。     

ON A PROBLEM OF N.SALINAS

This paper presents a discussion on a problem suggested by N.Salinas(J.Operator Theory,Vol.10,1983),i.e.,if T=(T_1,T_2,…,T_n)is a commuting n-tuple ofhyponormal operators on a complex Hilbert space,do we have(1)(2)δ(T-μ)=dist(μ,σ_l(T)),μ∈C~n?It is proved that the problems(1)and(2)are both true for some commuting n-tuples ofsemihyponormal operators.In general case,problem(1)has a negative answer.As an ap-plication,we point out that there exists a commuting n-tuple of hyponormal operatorsT(n≥2),such that|λ|<,where σ_T(T)denotes J.L.Taylor'sjoint spectra of T,even if the condition of Taylor's joint spectra of T is given.     

计算机软件学习方法思考

本文在概要分析计算机软件学习需求的飞速发展背景下,传统的基于专业知识学习的方式已经越来越不适应,一种全新的计算机软件的学习方法应运而生。