谈谈信息时代的教学方式

在教师角色发生转变，学生学习方式发生变化的信息时代的教学方式要注重教学质量，把信息时代的先进教学手段与传统教学手段有机结合起来，以有效地促进教学。     

轴承检测原理及其仪器的研究

本文讨论了轴承检测原理,提出了减少测量原理性误差的测量方法,以改善仪器的测量精度,并简要地介绍了所研制的具有信息处理功能的智能化轴承检测仪的结构和原理。     

硬状态材料喷丸表面的屈服强度

利用Ｘ射线应分分析技术对一种处于硬状态下的超高强度钢的电解抛光表面与喷丸表面的衍射线产半高宽和屈服强度进行测量，结果表明喷丸表面的半高宽显著减少了，但其屈服强度却大幅度提高了。     

谈企业人力资源管理系统

文章从人力资源的内涵谈起,以人力资源管理的核心思想为主要阐述内容,从4个方面综述了人力资源的管理系统,融汇了作者对人力资源管理的思想。     

原位纳米增强高强韧钢氢脆性能研究

We investigated the critical influence of in-situ nanoparticles on the mechanical properties and hydrogen embrittlement (HE) of high-strength steel. The results reveal that the mechanical strength and elongation of quenched and tempered steel (919 MPa yield strength, 17.11% elongation) are greater than those of hot-rolled steel (690 MPa yield strength, 16.81% elongation) due to the strengthening effect of in-situ Ti₃O₅–Nb(C,N) nanoparticles. In addition, the HE susceptibility is substantially mitigated to 55.52%, approximately 30% lower than that of steels without in-situ nanoparticles (84.04%), which we attribute to the heterogeneous nucleation of the Ti₃O₅ nanoparticles increasing the density of the carbides. Compared with hard TiN inclusions, the spherical and soft Al₂O₃–MnS core–shell inclusions that nucleate on in-situ Al₂O₃ particles could also suppress HE. In-situ nanoparticles generated by the regional trace-element supply have strong potential for the development of high-strength and hydrogen-resistant steels.     

基于ADAMS的舱体多余物检测效果影响因素分析

为分析舱体类设备多余物检测效果影响因素,提出基于正弦激励的舱体设备多余物振动检测方法,研究了振动加速度、振动频率、多余物材质和粒径参数4个因素对粒子碰撞噪声检测(PIND)法效果的影响.通过单因素仿真试验探究了各因素对多余物检测效果的影响规律及原因,并采用正交试验法设计ADAMS仿真分析试验和振动试验,通过极差计算确定关键影响因素.结果表明,影响检测效果的关键因素为多余物材质,并给出多余物材质和粒径的识别方案及最佳振动试验条件,为舱体内部多余物参数的进一步识别分类提供了参考.     

Review of the fatigue behavior of hard coating–ductile substrate systems

With the wide application of coating materials in aerospace and other fields, their safety under fatigue conditions in service is important.However, research on the fatigue properties of ceramic hard coatings started late, and a unified standard is yet to be established to evaluate the fatigue life of hard coating–ductile substrate systems.Studies also present different opinions on whether coatings can improve or reduce the fatigue life of substrates.In this paper, the influence of the properties of ceramic coatings on fatigue performance is reviewed, and the effects of coating on the mechanism of fatigue crack initiation in substrates are discussed, aiming to help readers understand the fatigue behavior of hard coating–ductile substrate systems.     

两种介质断裂问题各阶应力强度因子的直接积分表达

本文把文［１］的思想，推广应用到处理两种介质断裂问题的两种特殊情形。同时指出了专著［２］的某些错误。     

Changes of Soil Enzyme Activities in Different Restoration Ages of Spruce Forests on the Eastern Qinghai-Tibet Plateau

Six soil enzymes (invertase, acid phosphatase, proteinase, catalase, peroxidase and polyphenoloxidase ) were chosen for investigation under different spruce forests with restoration ages of 4,10,16 years and an old-growth spruce forest over 400 years old in the eastern Qinghai-Tibet Plateau, China. Results showed that the activities of invertase, phosphatase, proteinase, catalase and peroxidase decreased in newly restored forests except for pholyphenoloxidase. With the development of forests after restoration, the activities of invertase, acid phosphadase, proteinase increased gradually. Our study also indicated that the soil enzyme activities were associated with surface soils and decreased with depths. This result suggested that in the earlier restoration stage the application of organic fertilizer may be more effective by surface addition to soils than deep addition.     

石油亚砜萃取铟的机理研究

研究表明，在盐酸介质中，石油亚砜萃取铟的机理与水相酸度有关。低酸度时，亚砜通过氧原子与ＩｎⅢ）配位生成萃合物ＩｎＣｌ３，２ＰＳＯ．Ｈ２Ｏ，高酸度时，亚砜则通过氧原子配位溶剂化，并与Ｉｎ（Ⅲ）反应生成离子缔合物［ＰＳＯ→Ｈ］＾＋［ＩｎＣｌ４．２ＰＳＯ］＾－。