To explore the application feasibility of high-strength steel in skeleton columns of precipitator casing structures, the bearing behavior of axially compressed H-section high-strength steel columns was investigated by the nonlinear finite element method by considering the stressed-skin effect of wallboard. When the column yield strength does not exceed 460 MPa, the column undergoes elasto-plastic interactive buckling, which means the steel strength can be fully utilized. For the column strength of 550 MPa or 690 MPa, the wallboard yield failure occurs, owing to excessive loading of the relatively weak wallboard, and column stress magnitude is usually in the elastic range without the full utilization of steel strength, whereas if the wallboard is stiff enough, columns will still undergo buckling failure. A welding residual stress measuring test was conducted to validate the residual stress generation simulation via the thermal-mechanical coupling finite element method. Concerning the geometrical imperfections and residual stresses, it was found that their influence becomes less severe when the column steel strength increases. The bearing capacity can be improved by increasing the wallboard thickness and stiffener stiffness, or reducing the wallboard width, the stiffener spacing, the width-to-thickness ratio of column flange, the height-to-thickness ratio of column web, and column torsional slenderness ratio. Column material can be fully utilized when column steel strength does not exceed 460 MPa. Hence, employing high-strength steel is reasonable. When the column steel strength is equal to or higher than 550 MPa, wallboard strength should be sufficient to ensure that the column failure occurs before wallboard failure. In such cases, high-strength steel should be used carefully.

除尘器壳体围护结构中的立柱因需要支承顶部较宽截面的箱形梁以及承担较大的轴力而设计成双肢H型钢组合截面.利用非线性有限元方法,研究此双肢组合截面柱在考虑初始缺陷情况下承受轴向压力时的稳定性.研究表明,立柱轧制、墙板与立柱焊接产生的残余应力会小幅降低立柱稳定承载力.立柱的失稳形式为柱顶跨段内前翼缘与前腹板组成T形截面整体弯扭失稳与腹板局部失稳同时发生的相关失稳.墙板与两肢间连接墙板作为蒙皮板,为立柱承担部分荷载并约束其侧向变形.连接墙板越靠近前翼缘,立柱的稳定性越好.连接墙板宽度、墙板宽度、墙板角钢加劲肋刚度和节点连接板厚度等因素对立柱稳定性影响较小.仅邻近立柱的墙板和连接墙板增厚可对立柱稳定性有增强作用,远离立柱的墙板壁厚影响较小.立柱稳定系数与H型钢柱翼缘宽厚比的关系不是单调的;立柱绕弱轴弯曲长细比、腹板高厚比的增大会降低立柱稳定性.基于大量非线性有限元计算结果,提出了除尘器壳体中双肢组合截面轴心受压柱稳定承载力的计算建议.

On the basis of analyzing the cumulative mercury injection curves and SEM photos of dredged silt soildified soil samples,the fractal dimension of pore structure of dredged silt solidified soil is calculated by using the fractal theory,and the relationship between fractal dimension and microstructure parameters, macro mechanical properties and proportion of curing agents is established.The results show that the micro pore structure of dredged silt solidified soil has obvious fractal characteristics,and its fractal dimension is between 2.8-3.2.The fractal dimension of dredged silt solidified soil has a good correlation with average pore diameter,pore surface area,bearing ratio, cohesive force,internal friction angle and the content of mineral powder.With the increasing of the fractal dimension,the average pore diameter of solidified soil and the compression index decrease,and pore surface area,bearing ratio,cohesive force and internal friction angle increase.The fractal dimension increases with the increasing of mineral powder content.The fractal dimension can be used to describe quantitatively the pore structure characteristics and mechanical properties of dredged silt solidified soil.It can also provide data support for the analysis of macro and micro characteristics of dredged silt solidified soil and the establishment of the model.

To discuss the feasibility of using the fly ash and industrial slag solidified dredged sluge as roadbed material,a series of laboratory tests were performed to investigate the effect of curing agent ratios on the compaction properties,water stability,bearing capacity and shear strength.The test results showed that the maximum dry density of the solidified sludge with different curing agent ratios are higher than 1.50 g/cm3,and the optimum moisture content are about 20％ ～21％.The soaking induced expansion rate with the soaking time of 4 days are less than 1.1％,which indicates the water stability are ameliorated after solidification.With the decrease of fly ash and the increase of mineral powder,the CBR(California bearing ratio) and the shear strength are greatly increased.The solidified sludge with different curing agent ratios have high CBR after soaking for 4 days.The sample of SD10FA20MP has the highest CBR (34.8),which is 4.35 times of lowest requirement of roadbed filling of highway.It is concluded that it is feasible to use the fly ash and industrial slag solidified dredged sludge as roadbed filling material.

Aiming at the weakness and outstanding problems of construction of style of study in previous nuclear engineer-ing and technology professionals,University of South China( USC)carry out practical exploration for construction of style of study in Nuclear Engineering and Technology Professional from the aspects of strengthening ideological and moral con-struction,standardizing daily teaching order,reinforcing studentsˊ education and management,focusing on studentsˊ Party Construction,building up advanced representatives,and strict examination discipline and ethos,paying attention to the cam-pus culture carrier construction of nuclear industry,doing well in the construction of style of study in every class,doing well in cross campus zone student education and management,intensifying network and the computer supervision,and imple-menting evaluation mechanism for construction of style of study and so on.

This paper proposes an outline for the reform of the professional training program in the nuclear field .It is pointed out that the primary task of the training program is to establish students ’ awareness of the importance of practice ,to increase their interests ,and to conduct teaching program which not only focuses on students’ interests ,but also is adjustable to their different levels of capabilities .This paper mainly introduces the specific measures in the reform of professional training program in the nuclear field .It is believed that the ultimate goal of improving the quality of professional training in the nuclear field can be reached by establishing a more complete ,more scientific ,and more pragmatic personnel training curriculum .

在福岛核事故发生之前，中国曾计划到2015年使核电装机容量扩大到4000万千瓦，到2020年达到8000万千瓦[1]。而目前中国正在服役的核反应堆为15个，总装机容量不到2000万千瓦，这是因为日本“福岛”核电事故后，各国核电发展计划都受到影响，德国甚至完全放弃了核电发展计划，中国开发核电建设的势头也一度降温。不过，2012年12月24日召开的国务院常务会议，讨论通过《能源发展“十二五”规划》，再次讨论并通过《核电安全规划(2011-2020年)》和《核电中长期发展规划(2011-2020年)》。会议对当前和今后一个时期的核电建设做出部署：(一)稳妥恢复正常建设。合理把握建设节奏，稳步有序推进。(二)科学布局项目。“十二五”时期只在沿海安排少数经过充分论证的核电项目厂址，不安排内陆核电项目。(三)提高准入门槛。按照全球最高安全要求新建核电项目。新建核电机组必须符合三代安全标准。这意味着我国核电及相关技术产业将继续快速发展，且对核电及相关的核专业人才的需求更大，专业技术要求更高[2]。可是，近20年的核工业发展的低谷时期，造成了核专业人才的流失，国家在核专业方面的人才储备很少。2004-2005年，国家国防科工局根据当时核电发展形势和核工业发展规划，对我国核专业人才的需求情况进行了问卷调查和预测，得到的结果是：到2020年，全国需要核工程专业本科以上的人才大约6600人，基础科学及核技术应用专业大约5000人。按这个预测结果，2015年前，全国每年需要培养核专业学生1200名左右，包括：核反应堆工程专业学生330人、核化工与核燃料工程专业学生350人、辐射防护与环境保护专业学生130人、核物理等基础学科专业学生90人、核地质与铀矿冶专业学生140人。而我国高校核专业人才培养的实际情况与这个要求相差很大。“十一五”到目前的“十二五”末期，清华大学、哈尔滨工程大学、四川大学、南华大学、成都理工大学等高校大量增加了核专业人才培养的数量，但还是不能满足中核集团、广核集团等单位对核专业人才的需求，特别是对质量方面的需求。这意味着核专业人才培养的高校必须面向需求、重视人才培养的质量，也就要求核专业技术人才培养的单位建立更完整、更科学和更实效的人才培养课程体系。

本文论述了我国高校核类专业生产实习的重要性,介绍了南华大学核类专业生产实习方面的一些有益探索与实践,依据存在的问题提出了对策建议。要加强学生管理,严格考勤;延长实习时间,增加有针对性的实习内容;切实解决好实习过程中的"责""权""利"问题;构建全方位的生产实习模式,满足核类专业学生的高质量培养需要。

从核专业的理论实际出发,探讨基于放射物理方向的核专业实习教学,通过实习教学弥补放射物理理论教学的不足,强化放射物理理论教学的重点;培养学生的兴趣和实践能力,同时也让核专业的学生从实践教学中认识到不足,在以后的学习工作中查漏补缺,从而使其成长为一名合格的放射物理专业工程技术人才。

本文在分析现阶段我国核专业人才需求状况的基础上,指出提高核专业人才的工程素养和实践能力的重要性,介绍南华大学在创新核专业人才培养模式和改革实践教学方面的一些有益探索。

在分析现阶段我国核专业人才需求状况的基础上,指出提高核专业人才的工程素养和实践能力的重要性,并介绍了学校在创新核专业人才培养模式和改革实践教学方面的一些有益探索。

With the expansion of China's higher education,undergraduate teaching quality receives more and more attention of the society.Based on the analysis of present situation of undergraduate teaching quality of college,the paper presents that improving undergraduate teaching quality of college can promote the comprehensive development of students,cultivate creative talents,realize the higher education of people's satisfaction.

The production practice is a key process in the nuclear reactor engineering of the ordinary high school education,which can cultivate professional engineers in the field of nuclear reactor engineering,and it is an effective approach for the relation of major knowledge with the production practice,thus affecting the student's social adaptability directly.The University of South China carried out the exploration of production practice on nuclear reactor engineering in China Institute of Atomic Energy(CIAE) at June of 2011.The sufficient preparative work,stringent practice supervision and ascendant hardware and software in CIAE assured that production practice work was developed reliably.Both the student recognition and appraise from the practice unit have shown that production practice on nuclear reactor engineering is successful.

Based on the analysis of features of teaching quality appraisal of teacher sin colleges and universities,an evaluation model of university teachers' teaching quality based on fuzzy theory and BP neural network is introduced.The model transforms teaching evaluation indicators into qualified data as BP network input and takes fuzzy synthetic evaluation results as output.the method can both overcome the subjective factors of evaluation main body in evaluation process and bring the satisfactory evaluating results,and it has the widespread serviceability.

一 高校人文素质教育的内涵解读 就文化素质而言,它主要包括人文素质和科学素质两个方面.人文素质指人所具有的人文知识和由知识内化成的人文精神.人文知识是人类关于人文领域(主要是精神生活领域)的基本知识;人文精神是一种普遍的人类自我关怀,它是由人类优秀文化积淀、凝聚而成,凝结为人的道德情操、价值观念、理想人格和精神境界.

教学质量是高等学校立校之本、发展之基,更是事关民族兴旺、人民幸福和国家未来的一件大事。如何提高高校人才的培养质量,构建与多元化质量观相适应的教学质量保障体系,已成为当前大家共同关注和急需研究解决的重要课题。文章以南华大学为例,探讨了提高高校人才培养质量的五个"突破口",即转变教师教学理念、加强师资队伍自身建设、科学施教、协调教学与科研的关系和强化质量监控机制。

本文结合学院"3+1"培养模式的方案,从创新实验教学理念、创新实验教学方法、创新实验教学环境三个方面剖析了创新核技术应用实验教学,培养学生的动手实践能力和创新能力。

This article put forward the new reform idea,and introduced the experience of the practice teaching refom of nuclear science and technology speciality conducted in University of South China,including the model,methods,contents,management of practice teaching and the reform of how to increase the innovation ability of students.

Monte Carlo method is a numerical calculation method that is based on the probability and statistical theory and implemented by programming of the computer. It is widely used in the fields of nuclear science and technology. In the new period,the course of Monte Carlo method is offered for university students. The understanding probability and statistical principle and training in programming of the computer have been applied to teaching,and good teaching result is achieved.