82B方坯连铸末端电磁搅拌位置优化研究

采用射钉方法测定天津钢铁有限公司1^#铸机82B150mm方坯在工作拉速条件下不同位置上的的凝固坯壳厚度，得到了铸坯的综合凝固系数和液相穴长度，计算了铸坯末端电磁搅拌的最佳安装位置，为优化连铸工艺提供了重要依据。     

武钢干、湿法熄焦焦炭性能对比研究

为了研究干、湿法熄焦焦炭性能之间的差异,对武钢的干、湿法熄焦焦炭进行了常规、粒度、结构、强度、热性能、催化、光学组织等性能的对比分析研究.研究结果表明:与湿法熄焦焦炭相比,干法熄焦焦炭在平均粒度、粒度均匀系数、机械强度、热性能等方面均有明显改善;灰成分催化指数MCI、光学组织指数OTI基本不变;而吸碱能力强,抗碱能力弱,但是吸碱后的热性能仍优于湿法熄焦焦炭;吸硼能力弱、钝化效果差,钝化后干法熄焦焦炭的热性能稍低于湿法熄焦焦炭.     

长距离大型带式输送机输送带服役寿命的研究

系统研究长距离、高带速、大型带式输送机输送带的服役寿命，找出影响其服役寿命的原因，提出延长其服役寿命的技术途径。     

MES在安钢120t转炉生产线上的研究与实现

介绍了安钢120t转炉炼钢系统的工艺及其对MES的需求，并根据其工艺特点设计和实现了MES系统，并在系统中增加了国内其他企业MES系统所不具备的生产过程监控模块和设备状态监控模块，满足了工艺需求，具有一定借鉴意义。     

试论图书馆全面质量管理

介绍了国内外图书馆全面质量管理的研究现状，阐述了全面质量管理的特点和意义，最后提出了图书馆施行全面质量管理的有效举措。     

MCGS组态软件在多相流实验控制系统中的应用

介绍了工控组态软件MCGS的功用、结构和组成，及其基于MCGS开发的多相流实验控制系统。该系统能够实现油、气、水单相、多相流程的控制，自动采集并记录温度、压力、流量等参数，避免了人工数据记录、整理和烦琐的数据处理工作，提高了实验精度与工作效率。     

基于波叠加的噪声源识别实验研究

提出了基于波叠加的噪声源识别和定位方法。该方法克服了边界元法声全息固有的奇异性和非唯一性问题，原理上容易理解，计算上容易实现。从实验出发，建立了实验所需的采集和分析系统，根据实测数据利用自谱和互谱获取全息面上的复声压，结合正则化处理给出了同一平面三个音箱源识别的效果图，实验验证了该方法在进行噪声源识别和定位时具有较好的效果。     

学习质量的智能分析模型

学习质量分析是一个复杂的过程，首先探讨了影响成绩质量的几种不确定性因素，给出了直观分析模型、概率分析模型、概率推理分析模型等3种成绩分析模型，通过学生的学习成绩较系统地分析了学生的学习质量，最后利用MYCIN概率推理分析模型对一具体实例进行了智能分析。     

Digital Image Analysis in Geotechnical Engineering Education

Existing research has shown that visual input significantly contributes to learning, therefore, it is paramount to use visual tools to help demonstrate engineering concepts. One of these tools, digital image analysis, can help effectively communicate complex concepts to students in a simple and understandable format as a supplement to traditional lecturing, while simultaneously enabling students to have hands-on experience. This note describes a series of activities to incorporate digital image analysis into engineering education. The undergraduate students worked in research projects that involved image-based analysis of geomaterials. Based on these activities and the students’ response to a questionnaire, it was recognized that digital image analysis can enhance the understanding of engineering phenomena for undergraduate students. The hands-on experience and visual demonstration improved the students’ grasp of fundamental concepts in research projects. The research experience allowed the students to build a connection between the classroom and the solution of state-of-the-art engineering scientific problems. It also taught them about cooperation and teamwork, as well as academic independence.     

Combining propensity score matching and group-based trajectory analysis in an observational study.

In a nonrandomized or observational study, propensity scores may be used to balance observed covariates and trajectory groups may be used to control baseline or pretreatment measures of outcome. The trajectory groups also aid in characterizing classes of subjects for whom no good matches are available and to define substantively interesting groups between which treatment effects may vary. These and related methods are illustrated using data from a Montreal-based study. The effects on subsequent violence of gang joining at age 14 are studied while controlling for measured characteristics of boys prior to age 14. The boys are divided into trajectory groups based on violence from ages 11 to 13. Within trajectory group, joiners are optimally matched to a variable number of controls using propensity scores, Mahalanobis distances, and a combinatorial optimization algorithm. Use of variable ratio matching results in greater efficiency than pair matching and also greater bias reduction than matching at a fixed ratio. The possible impact of failing to adjust for an important but unmeasured covariate is examined using sensitivity analysis. (PsycINFO Database Record (c) 2010 APA, all rights reserved)