本钢物资计量网络系统的设计

在大型冶金企业中物资计量是企业计量管理的重要内容.本钢在全面的ERP战略中提出了对计量信息网络的升级改造要求,据此规划了面向公司内外的整体化、网络化的计量信息系统,并首先实施了物资计量网络系统.主要包括本钢计量信息网的总体规划与设计,物资计量网络系统的功能设计、业务处理流程设计和以称量为中心的数据流设计.     

微车车桥壳体专用快速测试仪原理及实现

快速测试仪的工作原理是采用测距传感器扫描每个被检测孔的内圆柱面,根据采集到的数据经过相关数学公式的处理,得到每个被检测孔的实际圆心,并将相应的圆心连接成直线,再用几何公式计算得到被测孔系需要检测的项目．利用快速测试仪替代原用的测试设备,将微车车桥壳体检测从抽检改为全检,使检测精度可以得到稳定可靠的提高．     

滁菊对淹水胁迫的形态及生理响应

为研究滁菊对淹水胁迫的响应进行本实验.选取滁菊进行淹水处理,观察其外观形态变化,测定了淹水期间滁菊的各项生理指标变化.结果表明：随淹水时间的延长,滁菊叶片逐渐萎蔫发黄、干枯,最后出现植株死亡现象.电导率、可溶性糖含量、脯氨酸含量呈现先上升后下降的趋势且基本高于对照值,叶绿素整体呈现下降趋势且低于对照,变化程度反映了滁菊受淹水胁迫的伤害程度.     

Teacher commitment and its effects on student achievement in American high schools

This study explored the effects of teacher commitment on student achievement. Three teacher commitment dimensions of organizational, professional, and student commitment were derived. The three-dimensional teacher commitment measurement model was tested by a confirmatory factor analysis. Then, the relationships among individual and organizational variables, teacher commitment, and student achievement were analyzed by a 2-level hierarchical linear modeling method. As the results, the greater portions of teacher commitment and student achievement variances were within schools. The individual and organizational variables had differential impacts on each teacher commitment dimension. Finally, while teacher commitment effects on student achievement were differentially found depending on teacher commitment dimensions at the individual level, there was no evidence to support significant impacts of teacher commitment on student achievement at the organizational level.     

微库仑测氯仪操作条件的优化

通过实验选择微库仑测氯仪的最佳使用条件,转化率达到85%以上,测得样品的标准偏差为0.48,相对标准偏差为2.03%。该分析条件的优化使用,缩短了分析时间,提高了工作效率及对工艺生产指导的及时性。     

浅议投资性房地产两种模式的核算及影响

随着市场经济的发展和完善,房地产市场日益活跃,投资性房地产核算日趋普遍。投资性房地产持有和后续计量有两种核算模式：公允价值模式和成本模式。选择何种核算模式会直接影响企业的资产债务状况和盈利水平。无论是成本模式还是公允价值模式都有其自身的优缺点,不存在好坏之分,关键要看该模式是否适合于企业;企业在进行选择时,也要对各方面的影响因素进行综合考虑,从而选择出最适用于企业的核算模式。     

Combining IRT and SEM: A Hybrid Model for Fitting Responses and Response Certainties

This article proposes a model-based procedure, intended for personality measures, for exploiting the auxiliary information provided by the certainty with which individuals answer every item (response certainty). This information is used to (a) obtain more accurate estimates of individual trait levels, and (b) provide a more detailed assessment of the consistency with which the individual responds to the test. The basis model consists of 2 submodels: an item response theory submodel for the responses, and a linear-in-the-coefficients submodel that describes the response certainties. The latter is based on the distance-difficulty hypothesis, and is parameterized as a factor-analytic model. Procedures for (a) estimating the structural parameters, (b) assessing model–data fit, (c) estimating the individual parameters, and (d) assessing individual fit are discussed. The proposal was used in an empirical study. Model–data fit was acceptable and estimates were meaningful. Furthermore, the precision of the individual trait estimates and the assessment of the individual consistency improved noticeably.     

《论语》复音词相关问题

通过整理《论语》中的复音词,以此为基础进行分类、研究,说明判断复音词的方法,主要考察复音词词义的来源和过程中发现的问题,以及复音词的内部结构。     

强化实践能力训练 提高学生工作素养

为加强大学生工作素质的培养,避免大学生在校学习与工程要求的脱节,开设了综合型创新实践课"测控技术与仪器实践能力训练"。该课程设计并实施了系统、深入的创新实践训练,贴近产品的设计、制造、工艺各个方面;面向工作素质培养、围绕一台精密仪器,既有实践环节、又有创新环节。     

钌（Ⅱ）配合物合成、表征及其与DNA作用的光谱研究

合成了一个新的钌（Ⅱ）多吡啶配合物[Ru（dmb）2（ipbd）]（ClO4）2[dmb=4,4′-二甲基-2,2′-联吡啶],ipbd=2-（6,9-二氧环己环苯基）咪唑并[4,5-f]邻菲咯啉,用元素分析、电喷雾质谱、^1H NMR对该配合物进行表征;用电子吸收光谱、粘度测试研究配合物与DNA作用。此外也研究了配合物清除羟基自由基的能力。实验结果表明配合物[Ru（dmb）2（ipbd）]（ClO4）2与DNA之间通过插入模式结合。