大众数学课程设计的初步探讨

立足教改新形势,论述了大众数学的意义,分析了大众数学课程设计原则和课程内容,综述了大众数学结构体系的选定,阐述了大众数学课程设计理念.     

Experimental and Parametric Design of Petroleum Back-pressured Hydraulic Impactor

Percussive-rotary drilling technology was considered many years ago as one of the best approaches for hard rock drilling. It is a key for popularizing this technology on a large scale to design and make an impactor with excellent performance. This paper presents a suit of method to design the percussive parameters for the oil or gas field by introducing the working principle of back-pressured impactor, dividing the working periods of impactor into three phases and establishing the computer emulational model of percussive parameters. It draws a comparison between the results of model calculation and experiment on the basis of analyzing the experiment results of impactor. The conclude provides credible foundation for designing and further ameliorating the impactor.     

关于集中供热系统热用户节能问题的探讨

探讨了集中供热系统热用户方面存在的问题，提出了相应的节能措施。     

复杂机械系统实用故障诊断原则的研究

在总结现有诊断技术成功应用实例的基础上,提出了一种新的实用诊断原则-“最少试验故障模”原则,对于复杂的机械设备和系统,采用这种新的研究思路有利于降低研究难度,提高研究成果的实用性.还以滑动轴承为例,通过对滑动轴承主要失效形式和机理的分析,说明可将滑动轴承简化为-多输入（多种故障原因）-单输出（接触摩擦）的灰色系统模型,并以滑动轴承各种故障的共同特征-接触摩擦作为滑动轴承故障诊断研究的唯一故障基准模.根据上述研究思路,对静、动载荷工作条件下滑动轴承的故障诊断进行了大量的实验研究.实践表明,提出的诊断原则诊断效率高,实用性强,可借鉴用于许多领域的故障诊断.     

语文教师的“减负”问题

素质教育要重视心理素质的教育。作为语文教师要培养学生健康的心理素质 ,更要关注自己的心理健康 ,以教师健康的心理塑造学生健康的心理。因此教师要有博大的心胸 ,要有对教育的爱 ,对学生的爱 ,对语文学科的爱 ,以此来消解过重的心理负担 ,轻装前进。笔者从五个方面具体论述了语文教师“减负”的对策     

企业合并中商誉的会计处理方法

随着我国经济体制改革的深化，企业间的合并活动日益频繁，但对与企业合并密切相关的商誉问题的处理却不够规范，为此从商誉的含义入手对合并商誉进行了研究，通过对商誉在企业合并后的会计处理方法的探讨，认乌拿兰商誉是由购买价格超过拥有的净资产公允价格的差额确认，确认后的商誉应在规定的年限内用直线法摊销。     

Cu（Ⅱ） effect on the conformation of regenerated silk fibroin in dilute aqueous solution

Much attention has been paid to the natural mechanism of silkworm spinning due to the impressive mechanical properties of the natural fibers. In this work, we studied the effect of Cu（Ⅱ） ions on the secondary structure of Bombyx mori regenerated silk fibroin （SF） in dilute solution by circular dichroism （CD）. The results indicate that a given amount of Cu（Ⅱ） induces the SF conformational transition from random coil to β-sheet, however, further addition of Cu（Ⅱ） is unfavorable for this conversion. Meanwhile, the conformational changes induced by Cu（Ⅱ） follow a nucleation-dependent aggregation mechanism, which is similar to that found in Prion protein （PrP） denaturation and Aβ-peptide aggregations, leading to the neurodegenerative disease. This work would help one understand further the natural spinning process of silkworm. Additionally, it would be significant for the study of the nervous system diseases, because silk fibroin, extracted in large amounts from Bombyx mori silkworm gland, could be a proper model to study PrP denaturation and Aβ-peptide aggregations.     

基于DEA技术的交通信号灯定时控制系统

本文介绍一种适合高校电子信息专业的EDA软件MAX＋PLUSⅡ,阐述使用MAX＋PLUSⅡ软件设计交通信号灯自动定时控制系统的过程.本设计在GW48-CK实验箱上进行了下载,验证了整个设计的正确性.     

柴油机排气呈白色故障排除及分析

以红岩6-250ZCD柴油机故障为例,发现并分析了柴油机排气呈白色的特殊原因,有利于今后故障的快速确诊.     

螺纹联接动载荷强度计算公式的探讨

该文以柴油机的连杆螺栓联接(非标准件)为例,在微机上用动力有限元方法对螺栓各圈螺牙的载荷分布,螺栓的静、动应力分布进行了计算与研究。提出了较材料力学经验公式精确的既简单又实用的螺纹联接的动载荷强度计算公式。