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工程认证背景下实践课程成绩评定方法与应用 被引量:2
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作者 高伟 蔡宴朋 谭倩 《教育教学论坛》 2023年第8期150-153,共4页
随着非标准化考试等教学改革的推进,课程成绩评定成为高校实践类课程的重要考核方式。然而,由于缺乏客观定量的评价方法,主观性考核方式在认定考生成绩时存在较大不确定性。如何有效降低主观评判的随意性和不确定性成为课程成绩核定亟... 随着非标准化考试等教学改革的推进,课程成绩评定成为高校实践类课程的重要考核方式。然而,由于缺乏客观定量的评价方法,主观性考核方式在认定考生成绩时存在较大不确定性。如何有效降低主观评判的随意性和不确定性成为课程成绩核定亟须解决的问题。研究提出基于师生协作的综合成绩评估方法,采用动态权重法综合学生打分和教师打分,形成更加合理的综合成绩分布,并以本科必修课程“环境规划与管理”期末成绩评定为例开展案例研究。结果表明,合理应用学生打分能够改善学生成绩分布,但要注意规避学生打分可能存在的均一化倾向和简单等权评分带来的成绩偏态分布问题。研究成果以期为大学实训类课程成绩评定提供一种新的方法。 展开更多
关键词 成绩评定 动态权重 主观 不确定性 实训课
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土木工程中混凝土施工技术分析 被引量:3
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作者 谢弘 《科技与生活》 2011年第13期142-142,171,共2页
随着社会知识化、科技信息化和经济全球化的不断推进,人类世界将进入可持续发展综合l司力激烈竞争的时代。人民生活离不开与混凝土打交道,它给人民带来巨大的财富以及生活水平的提高。建筑物和构筑物建造、使用中出现的质量、维护问... 随着社会知识化、科技信息化和经济全球化的不断推进,人类世界将进入可持续发展综合l司力激烈竞争的时代。人民生活离不开与混凝土打交道,它给人民带来巨大的财富以及生活水平的提高。建筑物和构筑物建造、使用中出现的质量、维护问题,及其老龄化问题,引起人们的高度关注和重视,各种修补加固方法也不断出现。 展开更多
关键词 土木下程 混凝土施工技术
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BIM在道路工程中的应用及问题探讨 被引量:6
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作者 胡敏 《市政技术》 2018年第2期47-49,82,共4页
简述了BIM在道路工程中应用的技术路线,并分别从标准体系、软件工具、人才队伍、工程应用等方面较为全面地论述了BIM在国内外的应用现状,同时对其在道路工程中应用相对较少及滞后的原因,从内在技术和外在共性等方面进行了详细分析,以期... 简述了BIM在道路工程中应用的技术路线,并分别从标准体系、软件工具、人才队伍、工程应用等方面较为全面地论述了BIM在国内外的应用现状,同时对其在道路工程中应用相对较少及滞后的原因,从内在技术和外在共性等方面进行了详细分析,以期更好地促进BIM技术在我国的发展。 展开更多
关键词 BIM 道路下程 应用 问题
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探讨水利工程生态化建设 被引量:2
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作者 胡凤霞 《科技与生活》 2011年第10期213-213,共1页
随着社会的进步,人们认识到水利工程对于河流生态系统可能造成不同程度的负面影响。从保护生态环境的高度,积极采取工程措施和生物措施对于受损河流生态系统予以必要的补偿,维护水域生态系统的功能,是流域生态建设的重要任务之一。
关键词 堤防下程 规范 生态建设
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Prediction of rockburst classification using Random Forest 被引量:69
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作者 董陇军 李夕兵 彭康 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第2期472-477,共6页
The method of Random Forest (RF) was used to classify whether rockburst will happen and the intensity of rockburst in the underground rock projects. Some main control factors of rockburst, such as the values of in-s... The method of Random Forest (RF) was used to classify whether rockburst will happen and the intensity of rockburst in the underground rock projects. Some main control factors of rockburst, such as the values of in-situ stresses, uniaxial compressive strength and tensile strength of rock, and the elastic energy index of rock, were selected in the analysis. The traditional indicators were summarized and divided into indexes I and 1I. Random Forest model and criterion were obtained through training 36 sets of rockburst samples which come from underground rock projects in domestic and abroad. Another 10 samples were tested and evaluated with the model. The evaluated results agree well with the practical records. Comparing the results of support vector machine (SVM) method, and artificial neural network (ANN) method with random forest method, the corresponding misjudgment ratios are 10%, 20%, and 0, respectively. The misjudgment ratio using index I is smaller than that using index II. It is suggested that using the index I and RF model can accurately classify rockburst grade. 展开更多
关键词 mining engineering tunnel engineering underground caverns ROCKBURST Random Forest
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小学数学教学中学生良好学习习惯的培养 被引量:1
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作者 尤评珠 陈淑明 《教育评论》 CSSCI 北大核心 1995年第5期61-61,共1页
良好的学习习惯,以其积极的行为定势,影响着学生的学习过程、学习质量与效果。小学阶段是形成学生各种习惯的关键时刻,在小学数学教学中要培养学生具有以下一些良好的学习习惯。 培养专心听讲的习惯。专心听讲,是学生在数学课上接受信... 良好的学习习惯,以其积极的行为定势,影响着学生的学习过程、学习质量与效果。小学阶段是形成学生各种习惯的关键时刻,在小学数学教学中要培养学生具有以下一些良好的学习习惯。 培养专心听讲的习惯。专心听讲,是学生在数学课上接受信息、吸收知识、学好数学的基本保证。 展开更多
关键词 良好学习习惯 小学数学教学 解题方法 中学生 解题思路 积极的行为 下程 吸收知识 定解 培养学生
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QUANTITATIVE APPROACH TO REAL TIME STARTUP TIME DETERMINATION OF DOWNSTREAM PHASES IN CONCURRENT ENGINEERING
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作者 吕常魁 姜澄宇 王宁生 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2004年第3期206-212,共7页
Implementation of simultaneous execution phases in the concurrent engineering (CE) needs careful planning when the downstream phase could be activated as the upstream phase developed to a certain point. The determinat... Implementation of simultaneous execution phases in the concurrent engineering (CE) needs careful planning when the downstream phase could be activated as the upstream phase developed to a certain point. The determination of startup time of overlapping jobs in CE has long been a disturbance in manufacturing industry implementing CE programs. A novel model based on both fuzzy logic and neural network is proposed to mathematically formulate the inter-connective information between the two coupled phases in CE projects, and to determine the startup time of downstream phases in real time. The information transferring between the two coupled phases is quantified by using the negative Shannon entropy. Based on this algorithm, a PDM-based framework is proposed to narrow the gap between pro-duct design and manufacture, in which five modules are built to monitor, reshuffle and implement the simultaneous executing processes. Finally, an example is given to illustrate applications of the algorithm in the real world. 展开更多
关键词 concurrent engineering negative entropy multilayer principle decision-making matrix
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培养学生良好的数学思维品质
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作者 黎伟英 《深圳信息职业技术学院学报》 1997年第1期49-51,共3页
良好的数学思维品质主要包括以下五个方面:①广阔性与深刻性;②独立性与批判性;③目的性与条理性;④灵活性与敏捷性;⑤创造性。在数学教学中,我是如何培养学生具有良好的数学思维品质的呢? 1.学会自学,培养思维的独立性与批判性. 在教学... 良好的数学思维品质主要包括以下五个方面:①广阔性与深刻性;②独立性与批判性;③目的性与条理性;④灵活性与敏捷性;⑤创造性。在数学教学中,我是如何培养学生具有良好的数学思维品质的呢? 1.学会自学,培养思维的独立性与批判性. 在教学中,我经常会碰到这样一些问题:(1)当老师提出问题时,若有个别学生开头作答,那么大部分学生就会跟着回答。若开头的答案是错的,那么跟着来的答案也可能是错的。(2)常规作业很少发现问题,可是单元测验却发现问题不少。追查其原因,相当部分的中下程度学生回答的是:“我做的作业是×××教我的”,或“ 展开更多
关键词 数学思维品质 培养学生 女生 数量关系 下程 单位“1” 思维的广阔性 批判性 条理性 独立思考
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为VB的文本框增加Undo功能
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作者 裔隽 《中国经济和信息化》 1996年第20期32-32,共1页
在Visual Basic中,Text Edit控件是一个很常用的控件,但是,VB中的Text Edit缺乏一个较为常见的基本功能,即Undo功能,这样可以允许用户取消最近一次的操作。如何在VB中实现这一点呢?下面的程序可供参考,并且利用Undo的本身性质,很容易地... 在Visual Basic中,Text Edit控件是一个很常用的控件,但是,VB中的Text Edit缺乏一个较为常见的基本功能,即Undo功能,这样可以允许用户取消最近一次的操作。如何在VB中实现这一点呢?下面的程序可供参考,并且利用Undo的本身性质,很容易地实现了Redo功能(其实就是Undo的Undo)。本程序适用于Visual Basic 3.0和4.0版本。 按照说明,将以下控件画在窗口内,并设置好相应的属性。窗口,Caption:“Undo Example”;命令按钮,Caption:“Undo”,Name:cmdUndo;文本框,MultiLine:-1(True)。 将以下程序分别输入到相应的控件的事件中。 展开更多
关键词 UNDO 文本框 控件 REDO TEXT Visua UNDO SendMessage函数 命令按钮 下程
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独立于工作台的全套软件编制工具
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作者 余力 《管理观察》 1994年第1期43-43,共1页
关键词 软件编制 软件工作台 编制工具 序接口 用户 序库 主要性能 主要应用 下程 条件
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水暖施工中的质量问题与处理措施
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作者 刘建萍 《科技与生活》 2012年第3期122-122,共1页
建筑给排水、采暖工程属于一个建筑单项工程的水暖分部,它的施工质量如何,虽然不会给建筑结构和人身安全造成很大影响,但它直接影响到用户的使用功能和生活质量,本文主要结合建筑工程水嫒施工中存在的质量问题作了分析,并对如何处... 建筑给排水、采暖工程属于一个建筑单项工程的水暖分部,它的施工质量如何,虽然不会给建筑结构和人身安全造成很大影响,但它直接影响到用户的使用功能和生活质量,本文主要结合建筑工程水嫒施工中存在的质量问题作了分析,并对如何处理这些问题做出了阐述。 展开更多
关键词 水暖下程 质量问题 处理措施
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The Estimation for Lower Bounds of the Solutions of Fermat's Equation
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作者 乐茂华 《Chinese Quarterly Journal of Mathematics》 CSCD 1992年第2期52-55,共4页
Let p be a prime with p≡3(mod 4). In this paper,by using some results relate the representation of integers by primitive binary quadratic forms,we prove that if x,y,z are positive integers satisfying x^p+y^p=z^p, p|x... Let p be a prime with p≡3(mod 4). In this paper,by using some results relate the representation of integers by primitive binary quadratic forms,we prove that if x,y,z are positive integers satisfying x^p+y^p=z^p, p|xyz, x<y<z, then y>p^(6p-2)/2. 展开更多
关键词 Fermat's last theorem integer solution lower bound
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Monadically slicing programs with procedures
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作者 张迎周 张卫丰 《Journal of Southeast University(English Edition)》 EI CAS 2008年第2期178-182,共5页
A two-phase monadic approach is presented for monadically slicing programs with procedures. In the monadic slice algorithm for interprocedural programs, phase 1 initializes the slice table of formal parameters in a pr... A two-phase monadic approach is presented for monadically slicing programs with procedures. In the monadic slice algorithm for interprocedural programs, phase 1 initializes the slice table of formal parameters in a procedure with the given labels, and then captures the callees' influence on callers when analyzing call statements. Phase 2 captures the callees' dependence on callers by replacing all given labels appearing in the corresponding sets of formal parameters. By the introduction of given labels, this slice method can obtain similar summary information in system-dependence-graph(SDG)-based algorithms for addressing the calling-context problem. With the use of the slice monad transformer, this monadic slicing approach achieves a high level of modularity and flexibility. It shows that the monadic interprocedural algorithm has less complexity and it is not less precise than SDG algorithms. 展开更多
关键词 program slicing monadic semantics interprocedural slicing calling-context problem
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Experimental simulation investigation of influence of depth on spalling characteristics in circular hard rock tunnel 被引量:27
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作者 LUO Yong GONG Feng-qiang +1 位作者 LI Xi-bing WANG Shan-yong 《Journal of Central South University》 SCIE EI CAS CSCD 2020年第3期891-910,共20页
A series of true-triaxial compression tests were performed on red sandstone cubic specimens with a circular hole to investigate the influence of depth on induced spalling in tunnels.The failure process of the hole sid... A series of true-triaxial compression tests were performed on red sandstone cubic specimens with a circular hole to investigate the influence of depth on induced spalling in tunnels.The failure process of the hole sidewalls was monitored and recorded in real-time by a micro-video monitoring equipment.The general failure evolution processes of the hole sidewall at different initial depths(500 m,1000 m and 1500 m)during the adjustment of vertical stress were obtained.The results show that the hole sidewall all formed spalling before resulting in strain rockburst,and ultimately forming a V-shaped notch.The far-field principal stress for the initial failure of the tunnel shows a good positive linear correlation with the depth.As the depth increases,the stress required for the initial failure of the tunnels clearly increased,the spalling became more intense;the size and mass of the rock fragments and depth and width of the V-shaped notches increased,and the range of the failure zone extends along the hole sidewall from the local area to the entire area.Therefore,as the depth increases,the support area around the tunnel should be increased accordingly to prevent spalling. 展开更多
关键词 deep underground engineering circular tunnels SPALLING strain rockburst true-triaxial loading V-shaped notch
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Rock burst proneness prediction by acoustic emission test during rock deformation 被引量:13
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作者 张志镇 高峰 尚晓吉 《Journal of Central South University》 SCIE EI CAS 2014年第1期373-380,共8页
Rock burst is a severe disaster in mining and underground engineering,and it is important to predict the rock burst risk for minimizing the loss during the constructing process.The rock burst proneness was connected w... Rock burst is a severe disaster in mining and underground engineering,and it is important to predict the rock burst risk for minimizing the loss during the constructing process.The rock burst proneness was connected with the acoustic emission(AE) parameter in this work,which contributes to predicting the rock burst risk using AE technique.Primarily,a rock burst proneness index is proposed,and it just depends on the heterogeneous degree of rock material.Then,the quantificational formula between the value of rock burst proneness index and the accumulative AE counts in rock sample under uniaxial compression with axial strain increases is developed.Finally,three kinds of rock samples,i.e.,granite,limestone and sandstone are tested about variation of the accumulative AE counts under uniaxial compression,and the test data are fitted well with the theoretic formula. 展开更多
关键词 rock mechanics rock burst proneness PREDICTION accumulative acoustic emission counts Weibull statistical distribution
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Blasting cumulative damage effects of underground engineering rock mass based on sonic wave measurement 被引量:5
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作者 闫长斌 《Journal of Central South University of Technology》 EI 2007年第2期230-235,共6页
The principle of sonic wave measurement was introduced, and cumulative damage effects of underground engineering rock mass under blasting load were studied by in situ test, using RSM-SY5 intelligent sonic wave apparat... The principle of sonic wave measurement was introduced, and cumulative damage effects of underground engineering rock mass under blasting load were studied by in situ test, using RSM-SY5 intelligent sonic wave apparatus. The blasting test was carried out for ten times at some tunnels of Changba Lead-Zinc Mine. The damage depth of surrounding rock caused by old blasting excavation (0.8-1.2 m) was confirmed. The relation between the cumulative damage degree and blast times was obtained. The results show that the sonic velocity decreases gradually with increasing blast times, hut the damage degree (D) increases. The damage cumulative law is non-linear. The damage degree caused by blast decreases with increasing distance, and damage effects become indistinct. The blasting damage of rock mass is anisotropic. The damage degree of rock mass within charging range is maximal. And the more the charge is, the more severe the damage degree of rock mass is. The test results provide references for researches of mechanical parameters of rock mass and dynamic stability analysis of underground chambers. 展开更多
关键词 sonic wave measurement cumulative damage effects damage degree blasting load surrounding rock of underground engineering RSM-SY5 intelligent sonic wave apparatus
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Stability control of underground construction 被引量:2
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作者 Chen Renpeng Tang Lvjun Chen Yunmin 《Engineering Sciences》 EI 2010年第4期31-36,共6页
This paper presents the reason for instability of underground construction. In order to know failure mechanism during the whole construction process, a research framework of multi-scale based on experiments and numeri... This paper presents the reason for instability of underground construction. In order to know failure mechanism during the whole construction process, a research framework of multi-scale based on experiments and numerical analysis is established. Some promising aspects in the topics of stability control are also given in the paper. 展开更多
关键词 multi-field coupling multi-scale analysis EXCAVATION TUNNELING FAILURE
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A comparative assessment of rock mass deformation modulus 被引量:3
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作者 Kadir Karaman Ferdi Cihangir Ayhan Kesimal 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2015年第5期735-740,共6页
Deformation modulus of a rock mass(E_m) is one of the most important design parameters in construction of rock engineering projects such as underground excavations.However,difficulties are frequently encountered durin... Deformation modulus of a rock mass(E_m) is one of the most important design parameters in construction of rock engineering projects such as underground excavations.However,difficulties are frequently encountered during in-situ tests which are also time-consuming and expensive for determining this parameter.Although E_m is often estimated indirectly from proposed equations by different researchers,many of these equations cannot be used in case of problematic rock conditions(thinly bedded,highly jointed rock masses,etc.) as high quality core samples are required.This study aims to explore more practical and useful equation for E_m estimation using Rock Quality Designation(RQD) and point load index values.Comparisons were made between available empirical equations and the proposed E_m equation in terms of the estimation capacity.Multiple comparison tests(ANOVA) showed that E_m can be reliably estimated using proposed equation especially at the preliminary stages of projects. 展开更多
关键词 Rock mass deformation modulus RQD RMR Q RMI Point load index
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Determination of rock resistant coefficient based on Mohr-Coulomb criterion for underwater tunnel 被引量:5
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作者 Zhong-ren TU Qiang YANG +1 位作者 Qi-ming SHEN Xiao-wen WANG 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2008年第9期1239-1244,共6页
According to the load-structure method, the wall rock with lining can bear the load caused by the surrounding rock, and the rock resistant coefficient (RRC) is a key parameter for evaluating the capacity of this wall ... According to the load-structure method, the wall rock with lining can bear the load caused by the surrounding rock, and the rock resistant coefficient (RRC) is a key parameter for evaluating the capacity of this wall rock. Based on the Mohr-Coulomb yield criterion, this paper develops a formula for calculating the RRC, which has been applied to the real engi-neering project, such as Xiamen Xiang’an East Passage Underwater Tunnel Project. The fact shows that this formula is helpful for designers to determine the RRC value. 展开更多
关键词 Rock resistant coefficient (RRC) Mohr-Coulomb yield criterion Rock mechanics Underwater tunnel
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QTPV Data Model and Algorithm and Its Application to Geological Exploration Engineering 被引量:1
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作者 CHENGPenggen SHIWenzhong +1 位作者 GONGJianya ZHOUGuoqing 《Geo-Spatial Information Science》 2005年第1期64-71,共8页
3D spatial data model and simulating are the core of 3D GIS can be adopted indifferent domains. A data model based on Quasi Tri-Prism Volume (QTPV) has been proposed. QTPVdefinition and its special cases have been dis... 3D spatial data model and simulating are the core of 3D GIS can be adopted indifferent domains. A data model based on Quasi Tri-Prism Volume (QTPV) has been proposed. QTPVdefinition and its special cases have been discussed. Using QTPV and its special cases, irregularnatural geological bodies and regular subsurface engineering can be described efficiently. Theproposed model is composed of five primitives and six objects. Data structures and topologicalrelationship of the fives primitives and three objects describing stratigraphy are designed indetail. Some schemes are designed for the QTPV modelling of stratigraphy and subsurface engineeringaccording to modelling data. The model manipulation method of QTPV cutting by an arbitrary plane isdiscussed. Using VC^(++)6. 0 programming language integrated with SQL database and OpenGL graphiclibrary under windows environment, a system prototype 3DGeoMV has been developed. The experimentresult shows that the QTPV model is feasible and efficient in modelling subsurface engineering. 展开更多
关键词 GIS QTPV data model ALGORITHMS VISUALIZATION subsurface engineering
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