改革创新实验教学质量监控方法对于实现高等教育健康持续发展,促进实验教学与理论教学有机融合具有重要的现实意义.提出了"三阶段"实验教学质量监控理论及监控系统,将实验教学分为实验准备、实验过程、实验评价三个阶段,以实验教学整个过程为监控对象,实时监控、反馈评价各个阶段的工作,形成一个完整的、闭环的生态监控体系.

本文主要讨论的是对湘江上下游土壤进行采样,经过研磨、烘干、过筛、压样等过程制样,再利用能量色散x荧光分析仪测量土壤中元素含量并对实验数据进行处理及分析,研究人类生产生活对土壤环境的影响.通过EDXRF法测量土壤中元素含量,可得到如下结论:工业生产和建筑筑造对湘江土壤中的元素Al、Zr、Pb含量造成了较大的影响,人们的生活废水废物向江中倾倒排放,农田地耕种、施肥、喷药会造成轻元素K、Fe含量的增高.

核技术应用实验课程融入创新研究性实验教学是符合培养学生创新思维、科学素养、多元复合型人才的需求.本文从创新研究性实验教学的重要性、融入准备工作、实施、实验报告、实验评价等方面论述了创新研究性实验教学实施的过程.实践证明:创新研究性实验提升了学生的创新思维,优化了学生的知识结构,培养了学生科学素养及多元智能的发展.

本文在分析新工科背景下核工程专业实验教学面临的挑战和存在问题的基础上,探讨了核工程专业实验课程体系的改革方向,主要是:增设实验项目,创新教学手段,细化考核办法.

本文简要分析了实验教学与理论教学的辩证关系,针对目前高校核辐射探测理论和实验课程的教学现状,指出了理论课与实验课脱节的现状,以培养学生实践能力和创新精神为目标,探讨了核辐射探测课程理论与实验一体化教学模式改革思路.

实验教学是培养学生综合素质、创造能力、实践能力的重要途径.核类专业实验采取科学合理、公正有效的考核方式有助于促进学生多元化能力的提升.通过对核类专业实验考核方法的不断探索,采取多方位、立体化考核评价实验课程成绩,促进了学生多元化能力的提升,提高了实验教学质量.

实验教学是培养学生综合素质、创造能力、实践能力的重要途径.科学合理、公正有效的考核和成绩评定是提高实验教学质量的有效途径.近几年笔者对实验教学考核方式不断进行探索,通过细化实验教学的过程考核和质量考核,提高了学生对实验课程的重视程度,促进了学生实践动手及创新能力的提升,达到了良好的教学效果.

实验课程是提高学生实践创新能力的重要课程.实验课程成绩是衡量实验教学效果的标准,也是发现实验教学问题的一种方式.然而,长期以来,多数高校在实验课程成绩评定中采用单一的评分模式,注重实验报告,忽视实验过程.为解决这一问题,南华大学核工程实验教学中心在核辐射探测实验、核电子学实验课程成绩评定的过程中,探索了一套以实验过程控制为主,以实验报告评价为辅的综合评分模式,并通过将预习、实验和报告评价三个过程有机的结合起来,充分发挥成绩评定对学生的激励引导作用.实践表明,开展综合性成绩评价,不仅有助于提高实验成绩评定的科学性,还能激励学生,提升学生实验能力.

By the process of SRIM,we can simulate the ion range,loss of energy,Silicon target damage by the different quality of charged particles implanted silicon.The results indicate that,the largest concentration of in-cidence of charged particles is located at the proj ection range in the silicon,and is smaller with the increase of the particle quality.The particle of mass to the mass of Silicon ratio is smaller than 1.8,the charged particle loss to electron energy to recoil of the silicon atoms loss to the energy of the electrons ratio is greater than 1 or less than 1 .Ionization energy loss decreases,and phonon energy loss increases with the increase of incidence of charged particles of mass.Total displacements and total vacancies increase rapidly,and replacement collisions increase slowly with the increase of incidence of charged particles of mass.

实验教学中教学内容陈旧、与社会需要联系不紧密、教学手段单一等问题凸显，改革势在必行。根据实验教学中存在的问题，提出了核类专业实验教学改革的思路、目标。通过改革实验教学的内容、实验课程体系、教学方法和手段、实验考核方式调动了学生的兴趣和积极性。改革有利于培养动手能力强、开拓创新的复合型人才。

文章介绍了什么是探究法以及实施过程.经过多年的教学实践和探索,在原子核物理教学过程中,课堂上适当的运用探究法教学可以提高学生们的学习能力.还可以活跃课堂气氛.最后,总结了运用探究法教学应该注意的一些同题.

[Objective] To study preservation effects of irradiation on fresh day lily.[Method] Fresh day lily was irradiated by 60Co γ after packaging.Effects of different dosage and dosage rate on nutrients composition were analyzed,as well as the preservation effects.[Result] The nutrient composition of fresh day lily after irradiated by different dosage 60Co γ has no obvious change.Effects of the same dosage and different adsorption dosage rate on nutrient composition are the same.Low dosage irradiation has superior preservation effect than high dosage irradiation.Low dosage irradiation and low temperature storage is better than storing in normal temperature.[Conclusion] The study can provide reference for application of irradiation in day lily preservation.

The absorption coefficients of different energy gamma-ray on the two types of nickel alloy and lead are measured by BH1324 and BH1220 devices.The experimental results show that the mass-absorption coefficient of nickel alloy decreases slowly with the increase of gamma-ray energy,and the values are close to these of lead in the higher energy region.So nickel alloys are suitable to replace lead as the shielding materials for gamma rays.

利用ECPSSR和PWBA理论分别计算了高能下F5+与Pb碰撞L壳层X射线产生截面,并与文献值进行了比较。重点对其结果进行了分析,进一步解释了高电荷态离子与原子碰撞的过程。

通过条件实验和设计不同实验方案,为法拉第磁光效应测量费尔德常数提供较好的实验方法。其方法是设计两种不同实验方案,一种不改变磁场的方向,另一种改变磁场方向,比较得出结论。通过改变磁场方向,实验结果误差要小些、结果更精确些。

实验教学是促进学生各项智能全面发展必不可少的环节。南华大学核科学技术学院实验教学中心以实现高等教育质量工程的要求为特色,立足核科学技术前沿,不断改革创新核技术应用实验教学方法,提升了学生各项智能的发展,激发了学生创新意识,提高了教学效果。

Through the analysis of the radioactive specific activity,exposures inside and outside the index in decor wood,the results shows that the radioactive content is different in different logs,are 40K 226 Ra 232 Th and the radioactive content of E0 Composite board is higher than E1.Analysis of samples can be used for indoor decoration materials.

Once the 20ci neutron source in the working state,the neutron emission rate is high,and the radiation to source chamber is large.A long time in the process of using the neutron source will bring about inevitable effects staffs in the source chamber and the surrounding environment.For the protection of the safe use of neutron sources,to meet safety standards and radiation protection optimization requirements,this paper discussed the effect of a research sources on the surrounding distribution of radiation dose,radiation source distribution of our field testing and data analysis research.Neutron source for the best screening measures will be taken to provide a reference.

目的分析测定南华大学氡实验室旁菜园中的蔬菜(莴笋、韭菜、白菜、白萝卜、胡萝卜、芹菜)中放射性水平。方法利用BH1216低本底弱α、β测量仪进行测量,并与食品中放射性物质检验《人工放射性核素限制浓度》(GB14883.1~14883.10)作比较。结果莴笋、韭菜、白菜、白萝卜、胡萝卜、芹菜中的α放射性比活度分别为:4.60、0.647、0.408、0.223、0.839、2.23 Bq/kg,β放射性比活度分别为:49.9、24.4、15.9、9.01、27.2Bq/kg。结论此地蔬菜中总α、β的放射性比活度与市售蔬菜处相同水平,低于国家蔬菜放射性浓度限制标准,食用是安全的。

The theory of transmission characteristic X-ray measurement thickness are discussed,hardware including equipment for characteristic X-ray producing,X-ray detector,data processor and monitoring software are introduced.Properties of the thickness gauge are tested,results show thickness gauge is sensitive,higher accuracy when tested material is thin,relative error within 5%,according with design request.