A STOCHASTIC ORDERING FOR RANDOM VARIABLES WITH APPLICATIONS

A new univariate stochastic ordering is introduced. Some characterization results for such an ordering are stated. It is proved that the ordering is an integral stochastic ordering, obtaining a maximal generator. By means of this generator, the main properties of the ordering are deduced. A method for introducing univariate stochastic orderings, suggested by the new ordering, is analysed. Relationships with other stochastic orderings are also developed. To conclude, an example of an application of the new ordering to the field of medicine is proposed.     

近似非齐次指数增长序列的间接DGM（1,1）模型分析

DGM（1,1）模型对近似齐次指数增长序列具有较高的预测精度,而实际上服从近似齐次指数增长规律的数据序列十分有限。根据灰色系统理论的差异信息原理,通过原始序列的累减生成将近似非齐次指数增长序列转化为近似齐次指数增长序列,对累减生成序列建立DGM（1,1）模型,并在此基础上实现对原始序列的还原以达到数据模拟及预测之目的。因原始序列的累减生成最大可能地满足了建模序列的齐次性要求,提高了模拟及预测精度,拓展了模型的适用范围,故通过算例验证了此种改进方法的简单性、实用性及有效性。     

Steam教育理念下戏剧活动对儿童学习过程与创造力的影响研究

研究以Steam教育理念下戏剧活动为干预项目，以61名大班儿童为研究对象。实验班儿童在教师带领下进行Steam教育理念下的戏剧活动，运用过程性量表和评价性量表对儿童进行学习过程和创造力测试，借助SPSS21.0统计软件进行前测和后测对比分析。经过为期1年的实验，得出以下结论：儿童的创造力得到显著提升；儿童正向学习兴趣增强，学习过程中的问题得到改观和控制；在学习方式上，儿童自主性提升。     

蒸汽流量积算仪的软件设计

讨论了蒸汽流量积算仪中温度及压力变化对测量值的修正方法，介绍了修正系数数据表和查表程序的软件设计。该设计在蒸汽流量积算仪中得到有效的应用。     

氢化物发生技术-氢化物发生器

氢化物发生作为一种简便、快速、高效的富集手段,以及作为一种气体进样方式与其它测试技术手段联用已在分析化学领域得到了广泛应用。文章对氢化物发生技术—氢化物发生器进行了评述。     

Methodology and analysis for comparing discrete linear l1 approximation codes

This is the first of a projected series of papers dealing with computational experimentation in mathematical programming. This paper provides early results of a test case using four discrete linear L₁ approximation codes. Variables influencing code behavior are identified and measures of performance are specified. More importantly, an experimental design is developed for assessing code performance and is illustrated using the variable “problem size”.     

Network social capital as an outcome of social movement mobilization: Using the position generator as an indicator of social network diversity

In the social mobility literature, the position generator (PG) has been used to examine the relationship between the structural location of individuals, and outcomes such as obtaining a high status job. Diversity of occupational ties (as measured by the PG) is also a significant predictor of an individual's cultural capital. A great deal of work has also been done in the field of social movements examining the relationship between networks and mobilization. However, only limited attention has been given to the position generator in this literature. Also, while past research has demonstrated that prior network ties to activists is one of the most important predictors of current activism, relatively little research has been devoted to examining network structure as an outcome of activism. The present paper builds upon these insights by utilizing data collected with the position generator on a sample of environmental movement members, and examining the relationship between individual activism (as an independent variable) and diversity of occupational ties (as a dependent variable). The result of key theoretical significance is that those who are more active in the environmental movement develop a greater diversity of occupational ties to other environmentalists. Results suggest that this process occurs over time. These findings provide evidence that social capital (as indicated by network diversity) is one outcome of social movement mobilization.     

具有反射器的绕射辐射振荡器的模拟研究

分析了具有反射器的8mm波段相对论绕射辐射振荡器,其高频系统为周期盘荷慢波结构,并且在电子注的输入端加有圆柱形同轴反射器。利用HFSS软件计算S11参数来确定反射器的结构尺寸。对该结构进行了PIC模拟,分析了该结构中注波互作用的非线性过程和反射器对该器件性能的影响。研究发现存在一个最佳反射器的位置,使注波互作用的效率高、频谱好。     

制浆新工艺——喷爆蒸煮制浆法

喷爆蒸煮制浆可认为是改良的化学机械制浆技术 .本文以芦苇为原料 ,采用相同的设备对喷爆蒸煮制浆工艺与内蒙古华章造纸厂的碱法制浆工艺进行了对比试验 ,并就试验结果进行了分析比较 ,进而为喷爆蒸煮制浆技术的应用提供了可供参考的数据     

燃气-蒸汽联合循环的原理与实际应用

本文介绍了当今世界电力工业中最先进的燃气-蒸汽联合循环的工作原理及实际应用，以弥补高等院校基础课程教学中实践知识的不足．