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彝语牛牛坝义诺话的接触音变研究

红河学院学报 2024年第5期22卷 7-11页

作者：鲁克美阿牛云南大学文学院云南昆明650091

彝语北部方言牛牛坝义诺话与周边的圣乍、田坝、阿都等几个土语长期接触,以致牛牛坝义诺话在语音上产生了变异,与其他几个土语在韵母和声调方面出现了一定程度的趋同,其中变化最显著的是韵母和声调,声母的变化则相对较小。通过比较分析... 详细信息

彝语北部方言牛牛坝义诺话与周边的圣乍、田坝、阿都等几个土语长期接触,以致牛牛坝义诺话在语音上产生了变异,与其他几个土语在韵母和声调方面出现了一定程度的趋同,其中变化最显著的是韵母和声调,声母的变化则相对较小。通过比较分析发现,相比彝语北部方言的其他土语,圣乍土语对牛牛坝义诺话的影响最大,圣乍土语是当地主要的强势影响方言。

关键词：彝语牛牛坝义诺话土语接触音变

Structural Evolution of an FeMoSiB Alloy during Ball Milling

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Journal of Materials Science & Technology 1998年第3期14卷 281-285页

作者： Guo, Faqiang lu, ke Acad Sinica Inst Met Res State Key Lab RSA Shenyang 110015 Peoples R China

Ball milling induced microstructure evolution in an FeMoSiB alloy with three kinds of different phase constitutions (bcc alpha -Fe solid solution and various borides) was investigated by means of X-ray diffraction and transmission electron microscopy. Experimental evidences indicate that a same final product of bcc alpha -Fe solid solution is formed upon milling for all samples. During the transformation, the XRD peaks of alpha -Fe phase shift to lower diffraction angles, and those of borides disappear in turn, first the metastable Fe//3B and Fe//2//3B//6 and then the stable Fe//2B. The observed structural evolution might originate from the transformation of ordered Fe//2B phase into disordered alpha -Fe solid solution. (Edited author abstract) 8 Refs.

关键词： Iron alloys

Dynamic Plastic Deformation (DPD):A Novel Technique for Synthesizing Bulk Nanostructured Metals

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Journal of Materials Science & Technology 2007年第6期23卷 771-774页

作者： Nairong TAO ke lu Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

While some superior properties of nanostructured materials （with structural scales below 100 nm） have attracted numerous interests of material scientists, technique development for synthesizing nanostructured metals and alloys in 3-dimensional （3D） bulk forms is still challenging despite of extensive investigations over decades. Here we report a novel synthesis technique for bulk nanostructured metals based on plastic deformation at high Zener-Hollomon parameters （high strain rates or low temperatures）, i.e., dynamic plastic deformation （DPD）. The basic concept behind this approach will be addressed together with a few examples to demonstrate the capability and characteristics of this method. Perspectives and future developments of this technique will be highlighted.

关键词： Nanostructured materials

基于多视图Transformer的下一个事件预测

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哈尔滨商业大学学报（自然科学版） 2024年第4期40卷 423-432页

作者：刘富豪卢可安徽理工大学计算机科学与工程学院安徽淮南232001 安徽理工大学数学与大数据学院安徽淮南232001

预测性业务流程监控依赖存储在事件日志中的历史数据预测当前执行流程的未来趋势.现有的基于深度学习的方法往往只考虑事件的活动和时间戳,忽略了事件的其他属性,导致预测下一个事件不够准确.针对此问题,提出一种基于多视图的Transforme... 详细信息

预测性业务流程监控依赖存储在事件日志中的历史数据预测当前执行流程的未来趋势.现有的基于深度学习的方法往往只考虑事件的活动和时间戳,忽略了事件的其他属性,导致预测下一个事件不够准确.针对此问题,提出一种基于多视图的Transformer模型进行预测,旨在提高对下一个事件的预测准确性.该模型基于事件日志中记录的各种事件信息,融合了自注意机制来建立事件序列和相应输出之间的复杂依赖关系,更全面地利用事件日志的信息.在4个真实生活事件数据集上的实验结果表明,所提出的方法在一定程度上提高了预测下一个事件任务的准确性,更准确地预测了未来业务流程中的事件.

关键词：业务流程深度学习预测性业务流程监控自注意机制多视图 Transformer

Deep Hashing Based on VAE-GAN for Efficient Similarity Retrieval

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Chinese Journal of Electronics 2019年第6期28卷 1191-1197页

作者： JIN Guoqing ZHANG Yongdong lu ke Institute of Computing Technology Chinese Academy of Sciences University of Chinese Academy of Sciences

Inspired by the recent advances in generative networks, we propose a VAE-GAN based hashing framework for fast image retrieval. The method combines a Variational autoencoder(VAE) with a Generative adversarial network(GAN) to generate content preserving images for pairwise hashing learning. By accepting real image and systhesized image in a pairwise form, a semantic perserving feature mapping model is learned under a adversarial generative process. Each image feature vector in the pairwise is converted to a hash codes, which are used in a pairwise ranking loss that aims to preserve relative similarities on images. Extensive experiments on several benchmark datasets demonstrate that the proposed method shows substantial improvement over the state-of-the-art hashing methods.

关键词： Image retrieval Learning to hash Variational autoencoder(VAE) Generative adversarial network(GAN)

稀土盐与泡沫分离强化乳酸乳球菌生产乳链菌肽

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食品与发酵工业 2024年第17期50卷 47-57页

作者：艾慕凡刘伟杨春燕殷昊卢珂河北工业大学化工学院天津300401

乳链菌肽(Nisin)是一种重要的食品防腐剂,但其工业应用却受限于较低的生产效率。该研究拟采用稀土盐和泡沫分离强化乳酸乳球菌生产Nisin。利用摇瓶试验研究了8种稀土盐对菌体生长和Nisin生物合成的影响。以Nisin的回收率和发酵液的总Ni... 详细信息

乳链菌肽(Nisin)是一种重要的食品防腐剂,但其工业应用却受限于较低的生产效率。该研究拟采用稀土盐和泡沫分离强化乳酸乳球菌生产Nisin。利用摇瓶试验研究了8种稀土盐对菌体生长和Nisin生物合成的影响。以Nisin的回收率和发酵液的总Nisin效价为指标,利用单因素试验和响应面优化试验获得了发酵与泡沫分离耦合操作的最佳工艺条件。结果表明,所选的8种稀土盐中,添加氯化铥(TmCl_(3))至发酵培养基能够大幅增加菌体生物量和Nisin产量。在发酵9 h添加1×10^(-4)mol/L的TmCl_(3),发酵液的Nisin效价达到(5643.23±156.57)IU/mL。在发酵与泡沫分离初始耦合时间18.50 h,气体分布器孔径300μm和气体体积流率135 mL/min条件下,Nisin的回收率和发酵液的总Nisin效价分别为(89.43±2.35)%和(6159.00±89.35)IU/mL。综上,适量添加稀土盐和执行泡沫分离,能够在促进菌体生长的同时缓解产物抑制,实现Nisin的高效生产。该研究提出的外源辅因子刺激和产物原位分离方法对于强化Nisin的工业生产具有重要意义。

关键词：乳链菌肽稀土元素泡沫分离响应面优化试验

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弗兰克-赫兹实验理论曲线推导

大学物理 2024年第6期43卷 73-78页

作者：陆可嘉王双中国科学技术大学物理学院安徽合肥230026

弗兰克-赫兹实验中的板极电流的理论预测模型亟待建立,现有相关理论工作侧重于对实验结果的分析和阐释,而少数理论计算模拟的工作或未展现理论曲线全貌,或运算耗时较长.本文基于两条引理和三条假设,将解析与编程结合,在1秒内给出理论曲... 详细信息

弗兰克-赫兹实验中的板极电流的理论预测模型亟待建立,现有相关理论工作侧重于对实验结果的分析和阐释,而少数理论计算模拟的工作或未展现理论曲线全貌,或运算耗时较长.本文基于两条引理和三条假设,将解析与编程结合,在1秒内给出理论曲线全貌,并分析其与实验值偏差的原因,据此引入电子运动轨迹和通过率修正,给出修正曲线全局预测,其与实验结果的符合度较高.这不但检验了玻尔理论的正确性,也表明理论成果可用于一定范围内板极电流的预测.

关键词：平均自由程板极电流通过率干扰电流激发能

Friction and Wear Behaviors of Nanostructured Metals

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Journal of Materials Science & Technology 2008年第4期24卷 483-494页

作者： Zhong HAN Yusheng ZHANG ke lu Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang110016 China

Nanostructured （ns） materials, i.e., polycrystalline materials with grain sizes in the nanometer regime （typically below 100 nm）, have drawn considerable attention in the past decades due to their unique properties such as high strength and hardness. Wear resistance of ns materials, one of the most important properties for engineering materials, has been extensively investigated in the past decades. Obvious differences have been identified in friction and wear behaviors Between the ns materials and their corresponding coarse-grained （cg） counterparts, consistently correlating with their unique structure characteristics and mechanical properties. On the other hand, the superior tribological properties of ns materials illustrate their potential applications under contact loads. The present overview will summarize the important progresses achieved on friction and wear behaviors of ns metallic materials, including ultrafine-grained （ufg） materials in recent years. Tribological properties and effects on friction and wear behaviors of ns materials will be discussed under different wear conditions including abrasive wear, sliding wear, and fretting wear. Their correlations with mechanical properties will be analyzed. Perspectives on development of this field will be highlighted as well.

关键词： Nanostructured metals Friction Wear Mechanical properties Tribological properties

Impurity Effect on Wear Resistance of Ultrafine-Grained Copper

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Journal of Materials Science & Technology 2012年第6期28卷 481-487页

作者： Bin Yao Zhong Han ke lu Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

The wear properties of ultrafine-grained （UFG） Cu samples of different purities were investigated in comparison with the coarse-grained （CG） Cu. The UFG Cu samples, prepared by means of plastic deformation via quasi- static compression, exhibit an enhanced wear resistance relative to the CG Cu samples. For both the UFG and the CG Cu samples, wear volumes increase at higher purities. A steady state worn subsurface structure was formed in each sample after sliding for 60 rain, consisting of a heavily deformed nanostructured mixing layer （NML） on top of a continuous dynamic recrystallization （DRX） layer. A pronounced correlation is identified that wear volume increases monotonically with an increasing grain size of the DRX layer. The impurity level of the Cu samples has an obvious influence on the DRX grain sizes, which in turn determines the wear resistance of the Cu samples.

关键词： Ultrafine grained copper Wear resistance Impurity Subsurface microstructure Dynamic recrystallization