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11.
张毅宁 《鞍山师范学院学报》2016,(2)
以模式识别中英文文字识别和人脸检测为例,利用PIL库、pytesser库和OpenCV库实现了图像灰度转换、降噪处理、文字识别和目标检测。应用表明,Python处理实验数据的方法简便灵活,表征数据图形直观明了,适合在数字图像处理课程的模式识别章节中应用。 相似文献
12.
WANG Xiu-li TU Jiang-ping CHEN Chang-pin ZHANG Xiao-bin ZHAO Xin-bing 《Journal of Zhejiang University. Science. B》2005,(3)
Mg2Ni0.8Cr0.2-x wt.% CoO/Al2O3 (x=0.5, 1, 2 and 3) composites were prepared by mechanically milling sintered Mg2Ni0.8Cr0.2 alloy and CoO/Al2O3 compound for 45 h. The addition of CoO/Al2O3 compound resulted in the good kinetics properties of hydriding/dehydriding reaction of the composites. The composite with 1.0 wt.% CoO/Al2O3 catalyst could reach the maximum hydrogen absorption capacity (2.9 wt.%) within 5 min at 393 K under H2 pressure of 4 MPa, and can desorb rapidly at 493 K. The decomposition and synthesis of hydrogen molecule on Mg2Ni0.8Cr0.2 alloy surface was promoted by addition of CoO/Al2O3 catalyst. In addition, the formation of metallic Ni particles, strain and defects during the ball milling process also resulted in the improved hydrogenation performance of Mg2Ni-based alloys. 相似文献
13.
Thi Quynh Trang Nguyen 《Teachers and Teaching》2017,23(1):78-90
Gaining and saving face are very important in Vietnam as a mechanism of social control, including the professional behaviour of teachers. Interviews with 15 lecturers (aged 24–37) at a teacher training college in a Central Coast province of Vietnam illustrated the relationship between their concepts of face and their beliefs about good teaching. Most were still strongly influenced by traditional Confucian beliefs about the role and position of teachers, the nature of teachers’ knowledge and the relationship between teachers and students. On the other hand, some teachers also were aware of, and to a limited extent open to, more modern ideas that seemed to be related to broad social changes and reforms in approaches to teaching and learning in recent decades in Vietnam. The findings suggest that some teacher educators are uncertain about the value of traditional professional wisdom in the context of critical changes in society and in education. The research also suggests that the concepts of face and saving face are important for teachers’ sense of agency, and that Vietnamese educational authorities could increase the effectiveness of innovations in teacher education by paying attention to the influence of concepts of face on the teachers’ beliefs and behaviours. 相似文献
14.
冯小军 《深圳职业技术学院学报》2004,3(1):1-6
为充分发挥数控机床的加工潜力和提高切削效率,作运用模糊控制方法研究了铣削加工过程的模糊自适应恒功率控制系统,并通过计算机仿真验证了控制方案的可行性;设计了系统的硬件和软件:进行了联机实验。实验结果表明,系统工作稳定可靠,平均可提高加工效率达20%以上。 相似文献
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吕一中 《河北软件职业技术学院学报》2003,5(2):40-42
本文主要对我国煤矿综放工作面自动化控制系统进行研究,建立控制系统的框架以及系统通信的有关协议,确立控制系统的主要功能。它开创了国内工作面自动化的先例,它不仅在煤矿安全,生产管理,人员减少方面发挥很大的作用,而且具有实用价值和推广价值。 相似文献
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Compacted graphite cast iron (CGI) has been the material for high-power diesel engines recently, but its increased strength causes poor machinability. In this study, coated and uncoated carbide tools were used in dry milling experiment and FEM simulation to study the machinability of CGI and wear behaviour of tools. The experimental and FEM simulation results show that coated tool has great advantage in dry milling of CGI. SEM and EDS analysis of tool wear indicate the wear morphology and wear mechanism. Adhesive wear is the main mechanism to cause un-coated tool wear, while abrasive wear and delamination wear are the main mechanism to cause coated tool wear. Stress and temperature distribution in FEM simulation help to understand the wear mechanism including the reason for coating peeled off. 相似文献
18.
教师课堂评价性语言对学生的发展会产生很大影响,因此,教师在对学生进行评价时要讲究语言表达的艺术。模糊语言以其自身的含蓄,委婉,灵活等修辞功能在交际中具有:礼貌客气,委婉含蓄,保护面子等潜在的交际功能。在教师的评价语中恰当地使用模糊语言有助于评价语取得更好的表达效果。 相似文献
19.
后博客时代的传播媒介——“微博”在电大教学中的应用 总被引:1,自引:0,他引:1
郝轶鸣 《山西广播电视大学学报》2011,(6):46-48
随着网络技术的不断更新,中国也在继博客、播客之后,涌现出一批诸如新浪微博、腾讯微博的传播媒介。"微博"作为后博客时代的新兴传播工具,具有跨时代的意义,同时也是电大教学过程值得探讨的重要课题。 相似文献
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