试论数学思维能力

本文对数学思维能力的本质作了分析和定义,对其表现特征作了分类,对如何加强数学思维能力的培养训练提出了基本观点(强制是产生能力的必须手段的观点)和一系列讲求强制艺术的做法。     

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.     

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.     

基于合作的主动知识外溢策略研究

合作中的知识外溢是客观存在的。知识资产所有者可以变被动知识外溢为主动知识外溢 ,利用知识外溢达成显示合作意向、塑造合作声誉、推动合作成功的目的 ,并通过两个博弈模型加以说明 :一是通过主动外溢传递合作信号 ,合作收益期望门槛降低 ,双方合作意愿加强 ;二是少量多批次外溢知识 ,可形成动态重复博弈 ,降低对合作成功度的要求 ,促成合作的成功