基于结构振动参数变化的损伤探测方法综述

综述了基于结构振动参数变化的损伤探测的方法，对现有的文献中的方法进行了分类和评述，重点介绍了当前急需的对复杂结构进行损伤探测的较为有效的方法，并对该领域在理论和实际应用中尚存在的问题进行了讨论，根据国内外最新的文献对这一领域未来的发展方向和趋势进行了展望。     

实验室间比对结果分析统计方法的探讨

对实验室间比对结果分析的统计方法进行了探讨。比较了常用的统计方法——稳健统计法和经典统计法的计算过程，对几次实验室间的比对结果分别用这两种统计方法进行了分析，同时结合格拉布斯检验法对离群值进行判断，从而探讨了两种统计方法的适用范围。认为当比对数据较多时，可采用稳健统计法给出严格的评价结论；当比对数据较少时，应先利用格拉布斯检验法对离群值进行剔除，同时要考虑方法标准或产品标准规定的允许误差，然后对余下的数据用经典统计法进行分析和评价。     

成组技术中零件分类的一种新方法

对成组技术中的分类分组方法进行了分析，指出了存在的不足．提出了用关联度和距离对零件分组进行综合考虑的薪方法，实例证明了该方法的有效性，并且便于计算机进行自动识别。     

基于正射影像更新中小比例尺DLG的方法研究

本文叙述了研究的过程并对更新方法进行了探讨，对更新成果精度进行了分析，对各种方法的优缺点和适用范围作了阐述。     

作业成本法在评价供应商中的应用研究

对供应商进行评价的标准和方法在不断发展和变化着，作业成本法为新环境下对供应商的评价提供了一种全新的思路。首先简单回顾了对供应商进行评价的各种标准和方法，然后提出了用作业成本法进行评价的思路和程序，最后用一个简单的案例进行了说明。     

ICP-AES法测定原油中的硅

针对原油样品中硅的分布，研究了碱熔与酸溶相结合对原油样品进行预处理的方法，并利用ICP-AES仪对原油中的硅进行测定。对实验条件、干扰等进行了考察，确定了一种较好的熔样方法，建立的实验方法简便快速，取得了较好的实验效果。实验方法的相对标准偏差为9．5％，回收率达到82-104％，有较好的精密度和准确度。     

呼吸裂纹故障动力特性及特征提取方法的研究

提出了故障行为特征提取的概念。对呼吸裂纹转子系统进行了以故障诊断为背景的动力学分析。提出了呼吸裂纹的界定方法。建立了呼吸裂纹转子系统的集总化模型，并利用数值方法对其求解。对开关函数和时变刚度的物理性质进行了深入讨论。用幅值谱对处于相对于裂纹不同位置处的振动响应进行了分析比较，根据差异，提出多测点信号幅值谱比较和构造复信号进行瞬时频率分析的特征提取方法，数值仿真和实验验证表明该方法是可行的。     

基于动力参数的桥梁结构损伤识别

阐述了近几年基于结构动力参数的桥梁工程结构损伤识别的方法，对这些方法进行了评议，指出了在理论和实际应用中的优点及存在的问题．选用一简支桁结构作为研究对象，对其进行了模拟损伤分析，采用不同的模态参数对其损伤情况进行了分析。同时说明了动力参数检测方法的应用。     

河流水文学研究综述

本文针对河流水文预报方法进行了综述，列举了当代国内专家学者对河流水文预报方法的探索和应用情况，并对目前业内典型的水文预报方法进行了展望。本文认为，分布式水文预报模型是未来水文预报作业的主导方法。     

自然景物IFS建模技术研究

基于迭代函数系统(IFS)理论研究了二维自然景物的计算机建模技术．讨论了传统的IFS拼贴建模方法，从整体和局部的组合与相似关系出发，对传统拼贴建模方法进行简化，给出两种简化方法：局部轮廓法和三点法，分析了3种建模方法的应用条件和具体实现技术。最后，通过典型图例的实验，对3种建模方法进行了比较。     

《生产与运作管理》教学体系改革探索

调查分析了在课程中学生学习的现状与教师教学及教学资源的现状,提出了本课程教学体系改革探索的思路,给出了教学过程中的具体实施措施.运用PDCA循环理念总结教学体系改革的成效,并使之得以巩固和持续提高.     

A broader view of the economic design of the X-bar chart in the semiconductor industry

This paper starts from a notice made in the semiconductor industry: a process control system and especially control charts provide information that can be exploited for correlation analyses during process investigations. In this industry, key and costly investigations are made for improving yield and reducing scrap. Daily, engineering teams are working at manufacturing improvements. Without process data, their work could take much more time and lead to weak improvements. Nevertheless, design of process control systems and in particular control charts lacks from taking into account this remark as there is no sound application to infer an optimal control chart depending on business parameters like yield, scrap, customer audits, etc. Meetings between several engineering teams (process control, quality, process integration, industrial engineering and production) occur frequently to find an affordable quantity of controls for each operation. The literature point of view does not provide more recommendations to take into account the reuse of data into these costly investigations. The paper investigates this issue. For this first investigation, work has been focused on the design economics of control charts for a simplified process model. The paper translates this concept into the Lorenzen and Vance's (1986) model. It simulates the design economic of a control chart taking into account this new model and infers new optimal statistical process control (SPC) set points. An analysis of this new link is made in a context of yield improvement, providing reference for knowing optimal quantity and frequency of controls.     

Optimization of the deflagration-to-detonation transition

An analysis has been made of the methods of the optimizing the deflagration-to-detonation transition in fuel mixtures. Engineering formulas for designing accelerators of this process have been proposed. Certain experimental results on its optimization in plane and diverging waves, which were obtained with highly efficient accelerators, have been presented.     

A simulation model for the temperature field in bioceramic coating cladded by wide-band laser

In this simulation model, three dimensional temperature fields for the wide-band laser cladding are performed by means of the finite element analysis in heat conduction, operating conditions and technical parameters. Some hypotheses and simplifications are reasonably made using commercial finite element analysis software in this paper. The results show that it is helpful to form a bioceramic coating that includes hydroxyapatite in the process of laser cladding with technical parameters optimized.     

Application of the point stress criterion to the failure of composite pinned joints

An analysis was performed to evaluate the bearing strength of pin-loaded composite joints using a two parameter characteristic curve model. This model involves determination of characteristic dimensions in tension and compression and based on this model, a two-dimensional stress analysis was used to determine the stress distribution around the fastener hole. In this analysis, characteristic dimensions in tension and compression were evaluated using the point stress failure criterion and joint bearing failure evaluated using the Yamada-Sun failure criterion. Results were compared with available experimental data for joints made from AS4/3501-6 graphite epoxy composite laminates and good correlation observed when evaluated as function of edge distance to hole diameter. However, the analysis yields conservative results when joint strength is evaluated as a function of plate width to hole diameter.     

Investigation of the possibility of formation of a conducting channel in the Earth atmosphere

Results are given of qualitative analysis of the possibility of developing an extended conducting channel in the Earth atmosphere with the aid of a directed photon beam. Assessment is made of the effect of various impurities on the possibility of attaining in this channel a minimal electron concentration required for the passage of current of preassigned magnitude.     

Recent developments in the understanding of fretting fatigue

Considerable progress has been made in the understanding of fretting fatigue over the last decade. Experiments have become more standardised and carefully controlled and this has provided the data necessary for development of methods for predicting fretting fatigue performance. This paper reviews a number of recent developments, starting with attempts to apply multiaxial initiation criteria to the fretting problem. The importance of the size effect is highlighted and an analogy is made between fretting and notch fatigue. Methods for characterising crack initiation using asymptotic analysis are discussed, together with short crack arrest concepts which provide a means of predicting fretting fatigue limits from plain fatigue data.     

一种特殊变比的电压互感器校准方法

本文介绍了一种特殊变比电压互感器的校准方法，并以此为例对校准的方法。进行了适当的分析和引伸。     

Research on the Information Fusion Method of Oil Diagnosis and Vibration Diagnosis Based on the Rough Sets Theory

The improved method has been presented for knowledge reduction in rough sets （R-S） theory, when R-S is used to model the information expression of oil and vibration diagnosis. Therefore, the typical fault simulation tests of rolling bearings have been made, and the application method of R-S has been also analysed in this paper. The diagnosis model of holding rack fault in rolling bearing was presented based on the improved reduction method. It is suited to information fusion to combine information when oil analysis and vibration analysis are combined for fault diagnosis.     

A comparison of exact and model solutions for the initiation of debond fracture

Debonding of a rigid rod from a compressible elastic matrix is considered. A simple model for the initiation of debond fracture is given and comparisons between this simple model and an exact analysis is made.