基于CNKI的文献题录批量转化程序设计

介绍了利用Visual Studio C#.net开发的一个程序。此程序可快速、灵活地将CNKI中“.txt”形式的输出文件中的大量题录数据自动导入到Excel文件,并进行相应的文献计量学研究。     

型腔尖角的轨迹优化

在铣削型腔尖角加工过程中,当环切法加工的行间距离比较大时,型腔尖角处将会出现加工残余.由于刀具与工件的接触线增加,使得尖角处铣削力增大.因此,采用了双圆弧过渡来处理型腔中的尖角,该方法能保证以尽可能大的行距走刀,缩短了加工时问,提高了加工效率,同时还可以清除尖角处的残余留量.尖角处刀具轨迹进行合理优化后,刀具沿着改进的轨迹快速运行,满足了高速铣削型腔的加工要求.最后,实验验证了该方法的有效性.     

基于人工神经网络的金属切削刀具磨损的识别与控制

根据金属切削刀具磨损与切削力的关系，建立了基于人工神经网络的切削刀具磨损的识别与控制系统，初步实现了用人工神经网络对金属切削刀具磨损的动态识别与控制。     

青枣滚动划痕原理与计算

本文概述了金丝蜜枣加工中青枣划痕工艺存在的问题,提出了青枣滚动划痕原理。解决了青枣划痕时要求深浅一致、宽度均匀、不重划、不漏划和连续加工等问题,又使同一划痕器对枣的直径适应范围可以从最小到最大,同时建立了青枣滚动划痕的数学模型及滚动划痕器的设计计算方法。     

土壤病原微生物检测技术研究进展

病原微生物如细菌、病毒、真菌等广泛存在于土壤环境中,其严重威胁着全球公共卫生安全。发展病原微生物快速检测技术,对于减少病原菌扩散传播、防控传染性疾病、维护生物安全具有重要意义。本文对病原微生物检测技术的最新研究进展进行了综述,包括显色培养技术、基质辅助激光解吸电离飞行时间质谱、分子生物学技术、拉曼光谱技术、流式细胞技术和生物传感器等,并对其原理、应用及优缺点进行了全面比较。最后,对病原微生物检测技术的未来发展提出展望,旨在促进土壤环境病原微生物的快速检测和生物风险防控。     

基于注意力机制的时空卷积数控机床热误差模型研究

为了提高数控机床热误差模型的精度与泛化性,提出了基于注意力机制的长短时记忆卷积神经网络(Long short term memory convolutional neural network based on attention mechanism, AM-CNN-LSTM)热误差模型。利用卷积神经网络提取高维数据空间状态特征的能力和长短时记忆网络提取长时间序列状态特征的能力,构建具有2个支路的热误差模型,分别提取特征后输入到注意力机制中进行特征重要性重构,建立原始数据与热误差的特征映射,最后通过全连接层进行热误差预测。采用G460L型数控机床进行实验数据采集,将不同季节采集到的温度数据和热误差作为模型输入,采用循环学习率与正则化优化方法对模型进行训练。与LSTM、ConvLSTM和CNN-LSTM热误差模型对比,结果表明,AM-CNN-LSTM模型对特征还原能力最强,残差波动范围最小,其残差范围较最大值下降62.09%,模型预测精度在2.4μm以内。     

浅述涂层刀具与深冷加工刀具的性能对比

刀具的涂层与深冷处理都是当今世界上流行的刀具强化与处理的新，经上述处理后的刀具既具有硬度高。耐磨性好，又能保持较好韧性等特点，但两者又有诸多不同之处。本文是作者在实验研究基础上，针对这二种处理的刀具各自的特点进行了分析对比，便于在生产上能合理的推广使用。     

Assessment of wood particleboards milling by means of energy consumption tests

In this paper, an experimental procedure is proposed, in order to evaluate the machinability of different particleboards. A dedicated test stand has been built to measure the power consumption during the process for different typologies of particleboards. This methodology could constitute a quick particleboard grading system, in order to maximise the feeding rate during the working process, and, at the same time, minimise the tool wear and the loads on the shaft of the electrical spindle, with a considerable improvement in the overall production costs.     

Spatially explicit fisheries simulation models for policy evaluation

This paper deals with the design of modelling tools suitable for investigating the consequences of alternative policies on the dynamics of resources and fisheries, such as the evaluation of marine protected areas (MPA). We first review the numerous models that have been developed for this purpose, and compare them from several standpoints: population modelling, exploitation modelling and management measure modelling. We then present a generic fisheries simulation model, Integration of Spatial Information for FISHeries simulation (ISIS‐Fish). This spatially explicit model allows quantitative policy screening for fisheries with mixed‐species harvests. It may be used to investigate the effects of combined management scenarios including a variety of policies: total allowable catch (TAC), licenses, gear restrictions, MPA, etc. Fisher's response to management may be accounted for by means of decision rules conditioned on population and exploitation parameters. An application to a simple example illustrates the relevance of this kind of tool for policy screening, particularly in the case of mixed fisheries. Finally, the reviewed models and ISIS‐Fish are discussed and confronted in the light of the underlying assumptions and model objectives. In the light of this discussion, we identify desirable features for fisheries simulation models aimed at policy evaluation, and particularly MPA evaluation.     

机械加工表面质量的影响因素及改进对策研究

机械加工表面质量对提高整个机械产品性能具有重要影响。在加工过程中,应该认识表面质量的影响因素,并根据实际工作需要,综合采取相应的改进和完善对策,从而有效预防质量缺陷发生,实现提高机械产品质量和性能的目的。