模糊理论在大型空气压缩机故障诊断中的应用

针对某大型船厂空气压缩机故障诊断的要求，提出了一种基于Fuzzy理论的故障诊断模型。该模型可以根据压缩机运行记录参数和现象进行有效的故障监测和诊断，并易于实现智能诊断。实际应用征明，结合油液监测和振动监测等方法，空气压缩机的故障诊断准确率和实时性得到大大提高。本文的监测思想和方法对其它设备的状念监测和诊断也具有重要的参考意义。     

基于油液分析的注塑机的状态监测

本文对一家汽车安全带生产厂的注塑机，冲压机进行了基于油液分析的状态监测，注塑机和冲压机是该厂的重要进口设备。为了获得注塑机运行状况的有关信息以及在该厂进行设备的现代管理视情维修。对该厂家注塑机、冲压机的油液分析持续了一年的时间，在监测中使用了多种监测技术，如：铁谱分析、发射光谱分析、理化指标分析、研究结果表明，使用综合油液分析技术对设备运行状态进行监测，对防止注塑机，冲压机的重大事故和避免代价高昂的事后维修有重要的意义，并对推进该厂的现代设备管理视情维修作出了重要的贡献。     

柴油机磨合规范优化研究

根据机器的磨损规律，分析了机器磨合机理和磨合的相关因素，略去次要因素，通过简化磨损过程的解析模型，提出了磨合过程方程式，研制出新的磨合油和制定了新的磨合规范。实践表明，采用新的磨合规范不仅提高了磨合质量，而且大大缩短了磨合时间，降低了磨合成本，提高了生产率。     

A new life cycle impact assessment approach for buildings

This study examines factors resulting in an environment burden (local EB) in the region where a building is located, and suggests a method for assessing it. The environmental burden (attached EB) caused by the expansion of infrastructures, such as, roads and parking lots for supporting buildings is also considered. An integrated life cycle impact assessment approach is proposed for buildings based on social cost account, called a region-type life cycle impact assessment (R-LCIA) here, which can give not only the total environment burden on a global scale but also the environment burden in a region scale and the attached EB. Furthermore, as an example of the R-LCIA, the environmental impact of a store building is assessed, and the effects of its location, structural type, and energy system are discussed.     

Tribological Performance of Attapulgite Nano-fiber/Spherical Nano-Ni as Lubricant Additive

Tribological properties of attapulgite, Ni and their composite nanoparticles suspended in mineral lubricating oil for a steel–steel contact were investigated with an optimal SRV-IV oscillating friction and wear tester. Results demonstrated that the composite nanoparticles exhibit better friction-reduction and anti-wear properties than the single additives. The oil containing a composite powder of 0.5 % attapulgite and 0.1 % Ni owns the best friction-reduction and anti-wear properties. Under the lubrication of oil containing composite nanoparticles, a smooth and compact tribofilm mainly composed of iron oxides, Ni, NiO and silicon oxide was formed on the rubbing surface.     

Recognition of wear mode using multi-variable synthesis approach based on wavelet packet and improved three-line method

Condition monitoring is an indispensable means of ensuring smooth running of key equipment, because it can improve machinery availability and performance, and also reduce damage and maintenance cost. One kind of condition monitoring is oil monitoring and it is applied extensively because of its capability to provide warning and to predict faults at early stages, with stronger pertinence. But the extraction and selection of features from oil data have always been the bottleneck of its effective application. In this study, prior to extraction and selection of features, denoising was implemented on the oil spectrometric data using 1D-DPT. For the purpose of mining more effective boundary features, we designed amelioration on classical three-line method based on statistics, and thus improved the three-line method. After the denoised signal was decomposed with WT, the three features, boundary, correlation degree and centroid were extracted, respectively, using the improved three-line method, correlation coefficients and K-means clustering. On the basis of these features, multi-variable synthesis analysis was advanced and the distance criterion parameter of synthesis analysis was proposed to classify and identify wear mode. Finally, through the comparison with examples applying the classical three-line method, we demonstrate the better the ability of the improved method to classify and recognize wear patterns with higher accuracy and precision.     

CO2短路过渡气体保护焊质量控制的研究

针对ＣＯ２短路过渡气体保护焊的电弧特点，利用统计方法从电弧电压、电流中提取幅值和时域的６个统计参数，作为焊接质量的评价依据。同时，针对ＣＯ２气体保护焊常见的飞溅大和成型差等问题，设定焊接质量参数Ｗ，并将神经网络技术引入质量评价系统，以求建立统计参数和质量参数之间的关系模型。通过实验，以神经网络估测的质量参数值Ｗ作为焊接生产过程质量控制的质量指标，绘制了中位数一极差控制图来实现对焊接过程的质量管理，     

新型的数字逻辑电路实验仪器

本文介绍了ＳＬＳ－１型数字逻辑电路实验机的组成和主要技术方案。该仪器功能齐全，结构新颖，性能可靠，适合于研究生，本科生进行数字逻辑电路实验和科学研究。     

高效合成润滑切削液及废液再生

本文介绍了ＭＣＴ新型高效润滑切削液在柴同机机体加工自动线大流量池中的成功应用经验，ＭＣＴ润滑切速液经美国ＳｐｅｃｔｒｏｉｌＭ光谱仪成份分析以上海卫生防疫站检验证明无毒，无刺激，达到环保防污染要求，经Ｆ－８３２６添加剂处理，ＭＣＴ废液再生，使用寿命延长一倍以上。     

高铬铸铁合金涂层的研究进展

介绍了高铬铸铁的组织和性能特点,综述了高铬铸铁合金堆焊、等离子熔覆和激光熔覆涂层最新研究进展。分析了高铬铸铁合金涂层制备以及服役过程中的裂纹形成,提出了减少和消除涂层裂纹的途径,并对高铬铸铁合金涂层的发展作了展望。