Effect of controlled rolling/controlled cooling parameters on microstructure and mechanical properties of the novel pipeline steel

The study of controlled rolling/controlled cooling process parameters which affect the microstructure and mechanical properties of a novel pipeline steel has been optimized by the orthogonal experiment with four factors and three levels in this paper. However, the parameters of thermo-mechanical control process （TMCP） optimized by the Gleeble-3500 hot simulator could not satisfy performance requirements of the X100 pipeline steel. In order to improve the performance of this steel, the influence of finish cooling temperature （FCT） on the microstructure and property is studied in detail. It is found that, as this steel is thermo-mechanically treated by this set of parameters （the start heating temperature, finish rolling temperature （FRT）, FCT and cooling rate of 1,180 ℃, 810 ℃, 350 ℃ and 35 ℃/s, respectively）, the micro- structures are mainly composed of granular bainite （GB） and acicular ferrite （AF）. The effective grain sizes are below 20 μm; the steel reaches the optimal balance between the strength and the toughness; the yield strength is 695 MPa; the tensile strength is 768 MPa; the elongation is 16.6 %; the impact energy is 262 J at room temperature. All indexes could meet the requirements of X100 pipeline steel.     

学生参与教研的形式与效果初探

学生作为教学活动的主体，理应成为教研工作的参与者．根据“学生代表参与评课”和“师生交流会”开展教学研究的实践、总结与分析，探讨了学生参与教研的形式与效果，为学校教研工作的有效开展提供借鉴．     

诱导式教学促进高中生身心健康的实验研究

针对高中学生存在身体和心理健康问题,采用实验法对福鼎一中高三年级8个班452人（实验班60人、对照班392人）,从认知、情感、兴趣和评价4个方面进行体育教学诱导式教学改革的实验尝试．实验表明：诱导式教学对高中生身心健康的发展有较大的促进作用．     

SCADA data based condition monitoring of wind turbines

Wind turbines（WTs） are quite expensive pieces of equipment in power industry. Maintenance and repair is a critical activity which also consumes lots of time and effort, hence making it a costly affair. Carefully planning the maintenance based upon condition of the equipment would make the process reasonable. Mostly the WTs are equipped with some kind of condition monitoring device/system, which provides the information about the device to the central data base i.e., supervisory control and data acquisition（SCADA） data base. These devices/systems make use of data processing techniques/methods in order to detect and predict faults. The information provided by condition monitoring equipments keeps on recoding in the SCADA data base. This paper dwells upon the techniques/methods/algorithms developed, to carry out diagnosis and prognosis of the faults, based upon SCADA data.Subsequently data driven approaching for SCADA data interpretation has been reviewed and an artificial intelligence（AI） based framework for fault diagnosis and prognosis of WTs using SCADA data is proposed.     

The influence of cognitive factors on guesses about the meaning of English word groups and phrases

During the English language learning, it is common for Chinese students to have to guess the meaning of new word groups or phrases. The guessing ability may be related to the cognitive sameness and differences between Chinese and English people. In order to validate this hypothesis, the author carded out a research by having students doing test papers. Finally the result of the research proved the hypothesis.phrase     

学科交叉视域下的理工科专业高年级本科生科研素质培养模式的构建

在学科交叉前沿认清理工类专业高年级本科生科研素质培养的重大意义,打破跨学科融合的壁垒,将阶梯式教学模式与"观、描、量、析"实践教学法合理运用于教学培养之中,为高年级本科生搭建科研学习与实践的"教学—项目—研究—交流"互动平台,并引入教师评价与学生评价相结合的科研能力多元评价体系,发掘学生的学术科研潜能,构建了学科交叉视域下高年级本科生科研素质培养模式,完善了基于多学科融合的学生科研培养机制,培养具有创新精神和科学创造力的多学科交叉复合人才来满足国家未来的发展要求。     

“土地法学”案例教学模式适用性分析及应用

本文结合安徽农业大学土地资源管理专业"土地法学"课程教学实践,在比较分析案例教学法五种运作模式运用于"土地法学"课程教学的适用性基础上,以案例讨论法运作模式作为研究对象,从案例的选择、案例的导入及组织、案例讨论及教师点评四个环节进行了实践经验介绍。指出案例教学法作为一种实践性教学法,有助于加强教师与学生、学生与学生之间的互动性,激发学生的专业学习主动性及潜力,大大提高了"土地法学"课程的教学效率。     

化学新课程教学中的困惑及初步解决方法

在化学新课程实施过程中，教师存在许多困惑，结合教学实例，简述了教学中几点困惑及初步的解决方法．     

数学教学中观察能力的培养

阐述在数学教学中，如何培养学生的观察能力，通过观察能力的培养，提高学生的解题能力，进而提高学生分析问题和解决问题的能力．     

利用农村环境资源提高初中生物学教学质量

由于基础设施的限制,农村中学学生视野较窄,但他们所处的生活环境中生物资源丰富多彩．农村中学生物教学可利用得天独厚的自然资源,促进教学,激发学生的学习兴趣,引导学生更好地学习生物,认识生物资源与人们生活的密切关系,促进学生的资源保护意识,培养高尚的情操。     

在体育教学中如何激活学生学习动力

从“快乐体育”，“终身体育”，“健身体育”的理念出发，结合多年从事体育教育体会到——学生喜欢体育，但不喜欢体育课的原因．从学生学习兴趣、丰富课的内容、开展多样化课的形式等几个方面来指导体育教学，不断提高教学质量．     

曲线方程教学与数学思维培养

数学思维能力在形成人类理性思维和促进个人智力发展的过程中发挥着独特的、不可替代的作用．学习数学和应用数学解决问题时，不断地经历直观感知、观察发现、演绎证明、反思与建构等思维过程，并掌握数学思维的常用方法．高中数学课程注重提高学生的数学思维能力是数学教育的基本目标之一．     

概念图在高中生物复习总结中应用的初探

高中生物复习课教学是师生双方从新的视角对所学知识进行系统梳理、深化、拓宽及灵活应用的教与学的过程．应用概念图可以有效地组织课程内容,激发学生自主构建生物学知识体系,使知识概括化、网络化,并能灵活地迁移．     

理论实践结合法在地质学与地貌学教学中的应用

理论实践结合法就是以教学大纲为本,课堂理论讲授为基础,野外实地考证为主导方法,提高学生认知能力和创新能力为目的,多种野外教学环节为手段,以确保教学质量为目标的教学方法。     

Application of multi-criteria decision making methods for selection of micro-EDM process parameters

Ti-6A1-4V super alloy is an important engi- neering material with good strength to weight ratio and a wide range of applications in a number of engineering fields because of its excellent physical and mechanical properties. This work determines optimum process parameters such as pulse on time, peak current, gap voltage and flushing pressure, which influence the micro-electro discharge machining （EDM） process during machining of Ti-6AI-4V using combined methods of response surface methodology （RSM） and fuzzy-technique for order pref- erence by similarity to ideal solution （TOPSIS）. Central composite design （CCD） is used in the experimental investigation. A decision making model is developed to identify the optimum process parameters in the micro- EDM process, which influences several machining criteri- ons such as material removal rate （MRR）, tool wear rate （TWR）, overcut （OC） and taper. Triangular fuzzy numbers are used to determine the weighting factor for each process criterion. Further a fuzzy-TOPSIS method is used to select the most desirable factor level combinations. The proposed technique can be used to select optimal process parameters from various sets of combinations of process parameters in a micro-EDM process.     

Fabrication method of ultra-small gradient-index fiber probe

Fabrication method and device of ultra-small gradient-index （GRIN） fiber probe were investigated in order to explore the development of ultra-small probes for optical coherence tomography （OCT） imaging. The beam- expanding effect of no-core fiber （NCF） and the focusing properties of the GRIN fiber lens were analyzed based on the model of GRIN fiber probe consisting of single-mode fiber （SMF）, NCF and GRIN fiber lens. A stereo micro- scope based system was developed to fabricate the GRIN fiber probe. A fiber fusion splicer and an ultrasonic cleaver were used to weld and cut the fiber respectively. A con- focal microscopy was used to measure the dimensions of probe components. The results show that the sizes of probe components developed are at the level of millimeter. Therefore, the proposed experimental system meets the fabrication requirements of an ultra-small self-focusing GRIN fiber probe. This shows that this fabrication device and method can be employed in the fabrication of ultra- small self-focusing GRIN fiber probe and applied in the study of miniaturized optical probes and OCT systems.     

“紫金模式”下资源勘查工程专业本科生企业培养方案框架体系与运行机制

福州大学紫金矿业学院依据"由企业支持办学建设、参与办学过程、检验办学成效"的运行与管理机制的"紫金模式",确定本科生的第六学期教学活动在上杭教学实践基地运行,主要由"工程实践型"企业教师承担的专业必修课、选修课和专业实习与实践以及课程设计等组成。已经组建的一支热爱教学工作、理论基础扎实、实践经验丰富、熟悉教学管理要求的企业"工程实践型"教师团队,在各教学环节中发挥了重要的互补作用。企业培养环节下一步需要加大基地的软件实力建设,努力提高"工程实践型"教师的教学水平与教学研究能力,面对新一轮国家战略调整对地矿行业的冲击,不断拓展企业实践的方向与合作企业范围,保障人才培养质量与学生就业的广适性。     

A genre-based analysis of English research article abstracts and the linguistic feature of personal pronouns for financial economics

This paper presents an empirical study of move structures and personal pronouns of fifty English RA （research article） abstracts based on the model of Bhatia （1990）. It revealed that three other move patterns were ascertained besides ten out of the analyzed abstracts following his move order. The analysis of personal pronouns showed that first-person plural pronouns are used far more frequently than other types of personal pronouns and no presence of the second-person and the third-person pronouns were detected in the abstracts. A further analysis suggests that first-person plural pronouns can perform multiple functions in abstracts. ESP （English as Special Purpose） teachers may benefit from the study to guide students to explore the discourse conventions of the RA abstracts in their own texts.     

浅淡少儿跳远助跑的训练

跳远训练,特别是少儿的启蒙训练,助跑是一个关键性的问题,助跑节奏稳定、助跑步点准确,自然踏跳就准确,就能充分发挥运动员的潜能,达到训练的最佳效果．从影响跳远助跑准确性的因素到培养跳远助跑的训练方法及跳远助跑训练注意事项,提出了多方面的想法．     

多媒体在数学建模教学中的辅助作用

鉴于目前学生把所学的数学知识应用于实际的能力欠缺的状况,中学数学应重视数学建模教学．多媒体技术在数学建模教学中有很强的辅助作用．