冶勒水电站超深覆盖层防渗墙应力变形性状的数值分析

应用邓肯-张非线性弹性模型和双屈服面弹塑性模型，计算了冶勒水电站大坝和超深覆盖层中防渗墙的应力变形性状，分析了防渗墙垂直缝、防渗墙顶部垫座分缝、防渗墙底部残渣和防渗墙槽段间施工缝参数对防渗墙应力变形性状的影响。     

炉外精炼用碱性白渣的特性

研究了白渣的构成和特性，及去除脱氧产物和脱硫的效果。以期获得合理的应用和进一步的开发。     

钡合金在钢中的应用

本文对有关钡及钡合金的理论研究和实际应用进行了综述,探讨了钡合金应用中存在的问题,指出钡合金具有脱氧、脱硫、使夹杂物变性和实现微合金化的综合精炼效果,具有广泛的应用前景。提出了进一步着重研究的方向。     

Pine needle oil causes avoidance behaviors in pocket gopherGeomys bursarius

Essential oils from coniferous trees contain secondary metabolites that act as feeding deterrents for a number of herbivorous mammals. We investigated effects of pine needle oil on feeding and other behaviors of herbivorous plains pocket gophers. In experiment l, pocket gophers were offered sweet potato from single feeding stations placed in home cages of individually housed animals. Stations contained either a scent dispenser with pine needle oil or mineral oil. Subjects removed significantly less food from stations scented with pine needle oil. Experiment 2 was performed to investigate neophobic responses to odors.d-Pulegone, presented under conditions identical to those used in experiment l, did not reduce food removal compared to mineral oil. In experiment 3 pocket gophers were observed in a maze consisting of a start box connected to two goal boxes by tunnels. One goal was scented with pine needle oil, the second with mineral oil. Subjects entered goals scented with pine needle oil significantly less frequently than goals scented with mineral oil and spent less time there. They performed all recorded behaviors at lower frequencies while located in pine-scented goals. In experiment 4 animals were introduced into a maze consisting of a start box from which two soil-packed tunnels could be entered. Embedded in the soil of one tunnel was a barrier of electrical cable that had been soaked in pine needle oil, the second tunnel contained a barrier of cable soaked in mineral oil. Pocket gophers gnawed significantly less insulation from cable treated with pine needle oil than from cable treated with mineral oil. Our results show that constituents in pine needle oil are aversive to plains pocket gophers. Under natural conditions they may function as feeding deterrents. Some of the compounds may be suitable repellents for control of pocket gopher damage.     

阳极炉烟气余热利用设计与生产实践

本概述了阳极炉烟气余热利用系统的特点，介绍了二次燃烧室，余热锅炉，空气换热器的形式，结构技术参数，分析了此系统的经济效益及节能指标。     

东营凹陷三维地震采集评述

通过对东营凹陷内已采集的67块三维地震资料的简要分析,回顾了其三维地震勘探的历程,对三维地震采集进行了后评估,论述了采集技术的发展与勘探需求的关系;并对凹陷内两块高精度三维二次采集的资料进行对比分析。最后,对第二次高精度三维地震采集提出几点建议。     

催化裂化汽油改质过程的八集总动力学模型研究

以催化裂化汽油的PIONA组成数据为基础，建立了催化裂化汽油催化转化改质过程的八集总动力学模型。模型计算结果与实验值的相对误差大多在2％以内。利用该集总动力学模型，定量计算了汽油催化转化改质过程中氢转移、异构化、环化、齐聚(链增长)等二次反应以及两类氢转移反应之间的比例。     

The relationship among self-concept, self-efficacy, and performance in mathematics during secondary school.

The relationship among self-concept, self-efficacy, and performance in mathematics was examined among 416 high school students. Participants completed a questionnaire assessing mathematics self-concept and mathematics self-efficacy. Performance was assessed using end-of-term exam results in mathematics. Confirmatory factor analyses supported the existence of two self-concept components--a competency component and an affective component. Self-efficacy items and the competency items of self-concept also loaded on a single factor. Social comparison information was equally influential in the formation of each construct. Self-efficacy beliefs, however, were identified as most highly related with performance in mathematics and percentages. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

超声波强化铝酸钠溶液种分过程的成核行为

以粒度分布信息考察了超声波强化处理铝酸钠溶液对铝酸钠溶液加晶种分解的二次成核的影响。实验发现在较低温度 ( <65℃ )和低频超声波强化作用下 ,在反应前期提高分解率的同时 ,能够促进铝酸钠溶液的二次成核。较低温度下 ,低频超声波强化有更强的二次成核作用。超声波强化促进二次成核随温度升高成核作用下降 ,在 5 5℃下低频超声波强化能够提高种分分解率 5 %～ 6%。     

基于Adams的绞车仿真分析

本文通过Adams二次开发建立了绞车的虚拟样机模型,并对绞车的运动和受力情况等性能进行了仿真分析,仿真分析的结果为绞车的优化设计提供了可靠的分析数据.