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预合金粉在金刚石工具中的应用

超硬材料工程 2020年第3期32卷 37-40页

作者：杨栋武玺旺张世峰李伟祥河南黄河旋风股份有限公司河南许昌461500

介绍了金刚石工具用预合金粉的优势及预合金粉中各个组成元素的作用,阐述了水雾化制取预合金粉的关键工序及国内外发展现状,探讨了国内预合金粉的发展趋势,希望能给粉体制备及金刚石工具厂商借鉴。

关键词：预合金粉胎体金刚石工具水雾化

基于粗糙集和BP神经网络的石化管道外腐蚀程度预测应用

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计算机测量与控制 2015年第1期23卷 266-268,272页

作者：王金秋李为相朱承飞南京工业大学自动化与电气工程学院南京210009 南京工业大学材料与工程学院南京210009

研究管道外腐蚀程度预测问题;传统预测方法有专家评分系统等,而造成管道腐蚀的原因众多,专家对各个因素的偏好不一样,因此这类方法个人主观因素较强,预测的结果不够客观、准确;为了克服个人主观影响,提高预测精度,提出粗糙集-BP神经网... 详细信息

研究管道外腐蚀程度预测问题;传统预测方法有专家评分系统等,而造成管道腐蚀的原因众多,专家对各个因素的偏好不一样,因此这类方法个人主观因素较强,预测的结果不够客观、准确;为了克服个人主观影响,提高预测精度,提出粗糙集-BP神经网络预测模型;该预测模型首先利用粗糙集理论消除管道腐蚀影响因素中的冗余因素,然后利用BP神经网络依据处理后的数据进行学习建模,并测试;仿真结果表明了该模型简洁性、快速性和有效性。

关键词：粗糙集 BP神经网络管道腐蚀预测

PMTFPS-b-PMMA/PMMA共混聚合物膜的表面性质

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浙江理工大学学报（自然科学版） 2017年第6期37卷 804-809页

作者：王爱瑞邵英易玲敏李伟翔李家炜浙江理工大学材料与纺织学院杭州310018 浙江理工大学先进纺织材料与制备技术教育部重点实验室杭州310018 浙江工程设计有限公司杭州310002

将不同质量分数的氟硅与甲基丙烯酸甲酯嵌段共聚物(PMTFPS-b-PMMA)和甲基丙烯酸甲酯(PMMA)配制成2.00wt%溶液,经旋涂、退火处理后得到共混聚合物膜。以水、二碘甲烷和甲酰胺为参比液,利用接触角测试仪测定了共混聚合物膜的表面能。研究... 详细信息

将不同质量分数的氟硅与甲基丙烯酸甲酯嵌段共聚物(PMTFPS-b-PMMA)和甲基丙烯酸甲酯(PMMA)配制成2.00wt%溶液,经旋涂、退火处理后得到共混聚合物膜。以水、二碘甲烷和甲酰胺为参比液,利用接触角测试仪测定了共混聚合物膜的表面能。研究结果表明:当共混聚合物中PMTFPS链段含量在由0.28wt%增大至5.67wt%时,表面能从26.90mN/m降到14.49mN/m,共混物涂膜表面氟元素的相对含量从0.93%急剧增加到14.27%;随PMTFPS链段含量的进一步增加,共混物膜表面能仅略有下降,表面氟含量增加也不明显,说明此时共混物膜的表面组成已趋于稳定。

关键词：氟硅聚甲基丙烯酸甲酯嵌段共聚物共混表面性质

基于PLC和触摸屏的船舶电力推进监控装置设计

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船电技术 2014年第12期34卷 23-26,30页

作者：李伟翔施伟锋张威徐培杰上海海事大学电气自动化系上海201306

为提高船舶电力推进的控制质量与安全可靠性,设计了基于施耐德M340 PLC和XBTGT7340触摸屏的电力推进系统监控装置。装置的硬件方面,以Modbus现场总线技术为基础,运用ATV61变频器实施推进电机控制,运用PM850和ION7650两种电力参数检测仪... 详细信息

为提高船舶电力推进的控制质量与安全可靠性,设计了基于施耐德M340 PLC和XBTGT7340触摸屏的电力推进系统监控装置。装置的硬件方面,以Modbus现场总线技术为基础,运用ATV61变频器实施推进电机控制,运用PM850和ION7650两种电力参数检测仪表实施推进系统监视。装置的软件方面,在完成现场总线通讯、推进系统故障报警编程的基础上,鉴于船舶航行海况等因素对于推进系统安全运行的巨大影响,设计了转速/转矩联合的控制方式和两种控制方式进行无扰动切换的逻辑功能。装置制作完成后进行的推进电机控制实验表明,其功能可以满足船舶电力推进监控的主要要求。

关键词：船舶电力推进监控装置 PLC 触摸屏人机界面

Electrothermal Model Based Remaining Charging Time Prediction of lithium-Ion Batteries against Wide Temperature Range

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Chinese Journal of Mechanical Engineering 2024年第2期37卷 330-339页

作者： Rui Xiong Zian Zhao Cheng Chen Xinggang li weixiang Shen School of Mechanical Engineering Beijing Institute of TechnologyBeijing 100081China School of Science Computing and Engineering TechnologiesSwinburne University of TechnologyHawthornVIC 3122Australia

Battery remaining charging time(RCT)prediction can facilitate charging management and alleviate mileage anxiety for electric vehicles(EVs).Also,it is of great significance to improve EV users’***,the RCT for a lithiumion battery pack in EVs changes with temperature and other battery *** study proposes an electrothermal model-based method to accurately predict battery ***,a characteristic battery cell is adopted to represent the battery pack,thus an equivalent circuit model(ECM)of the characteristic battery cell is established to describe the electrical behaviors of a battery ***,an equivalent thermal model(ETM)of the battery pack is developed by considering the influence of ambient temperature,thermal management,and battery connectors in the battery pack to calculate the temperature which is then fed back to the ECM to realize electrothermal ***,the RCT prediction method is proposed based on the electrothermal model and validated in the wide temperature range from-20℃to 45℃.The experimental results show that the prediction error of the RCT in the whole temperature range is less than 1.5%.

关键词： Electric vehicles lithium-ion batteries Remaining charging time Electrothermal model

Graphitized Cu-β-cyclodextrin polymer driving an efficient dual-reaction-center Fenton-like process by utilizing electrons of pollutants for water purification

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Journal of Environmental Sciences 2023年第4期126卷 565-574页

作者： weixiang liao Lai Lyu DiWang Chun Hu Tong li Key Laboratory for Water Quality and Conservation of the Pearl River Delta Ministry of EducationInstitute of Environmental Research at Greater BayGuangzhou UniversityGuangzhou 510006China School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083China

Excessive consumption of energy and resources is a major challenge in wastewater ***,a novel heterogeneous Fenton-like catalyst consisting of Cu-doped graphenelike catalysts (Cu-GCD NSs) was first synthesized by an enhanced carbothermal reduction of β-cyclodextrin (β-CD).The catalyst exhibits excellent Fenton-like catalytic activity for the degradation of various pollutants under neutral conditions,accompanied by low H_(2)O_(2)*** results of structural characterization and theoretical calculations confirmed that the dual reaction centers (DRCs) were constructed on Cu-GCD NSs surface through C-O-Cu bonds supported on zero-valent copper species,which play a significant role in the high-performance Fenton-like *** pollutants that served as electron donors were decomposed in the electron-poor carbon centers,whereas H_(2)O_(2)and dissolved oxygen obtained these electrons in the electron-rich Cu centers through C-O-Cu bonds,thereby producing more active *** study demonstrates that the electrons of pollutants can be efficiently utilized in Fenton-like reactions by DRCs on the catalyst surface,which provides an effective strategy to improve Fenton-like reactivity and reduce H_(2)O_(2)consumption.

关键词： Fenton-like Dual reaction centers Graphene-like carbon Nanoscale zero-valent copper Pollutants degradation

Low H_(2)O_(2)consumption Fenton-like catalysts for pollutant cleavage based on the construction of a dual reaction center

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Journal of Environmental Sciences 2024年第11期145卷 107-116页

作者： weixiang liao Ziwen Zhao Lai Lyu Chun Hu Fan li Key Laboratory for Water Quality and Conservation of the Pearl River Delta Ministry of EducationInstitute of Environmental Research at Greater BayGuangzhou UniversityGuangzhou 510006China Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China South China Institute of Environmental Sciences Ministry of Ecology and EnvironmentGuangzhou 510345China

High energy consumption has seriously hindered the development of Fenton-like reactions for the removal of refractory organic pollutants in *** solve this problem,we designed a novel Fenton-like catalyst(Cu-PAN3)by coprecipitation and carbon thermal *** catalyst exhibits excellent Fenton-like catalytic activity and stability for the degradation of various pollutants with low H_(2)O_(2)*** experimental results indicate that the dual reaction centers(DRCs)are composed of Cu-N-C and Cu-O-C bridges between copper and graphene-like carbon,which form electron-poor/rich centers on the catalyst surface.H_(2)O_(2)is mainly reduced at electron-rich Cu centers to free radicals for pollutant ***,pollutants can be oxidized by donating electrons to the electron-poor C centers of the catalyst,which inhibits the ineffective decomposition of H_(2)O_(2)at the electron-poor *** therefore significantly reduces the consumption of H_(2)O_(2)and reduces energy consumption.

关键词： Water purification Fenton-like Dual reaction centers Graphene-like carbon Low H_(2)O_(2)consumption

Damage evolution and failure mechanism of thermal barrier coatings under Vickers indentation by using acoustic emission technique

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Progress in Natural Science:Materials International 2018年第1期28卷 90-96页

作者： Caicai li Xing Qiao Teng Wang weixiang Weng Qiang li School of Materials Science and Engineering Fuzhou University

Acoustic emission(AE) technique was adopted to monitor the damage evolution of air plasma-sprayed(APS) yttria-partially-stabilized zirconia(YSZ) thermal barrier coatings(TBCs) during instrumented indentation testing, and then the failure mechanisms were investigated by cluster analysis and wavelet transform *** results of cluster analysis showed that there were three classes associated with distinct failure types for the 8YSZ coatings under Vickers indentation. Based on wavelet transform, these three clusters could be clearly distinguished from their dominant frequency bands, which were concentrated on levels A5(0–156.25 kHz), D5(156.25–312.5 kHz) and D4(312.5–625 kHz), respectively. Thus, the failure mechanism of 8YSZ coatings under Vickers indentation could be clarified by the distribution of different failure types in indentation depth. To sum up, as indentation load increases, the 8YSZ coatings can accommodate the indenter by elastic or little plastic deformation, microcracks propagation and then debonding at the splat boundaries. By comparing the distribution of AE signals induced by different failure types in indentation depth for samples with different thermal exposure time, it can be inferred that thermal exposure treatment can accelerate the degradation of APS 8YSZ TBCs.

关键词： Thermal barrier coatings Instrumented indentation testing Acoustic emission Failure mechanism

成年Chiari Ⅰ畸形伴脊髓空洞患者的颈椎管结构异常及其与脊髓空洞的相关性

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中华骨科杂志 2016年第20期36卷 1319-1326页

作者：袁鑫鑫沙士甫邱勇朱卫国孙伟翔李洋胡宗杉朱泽章南京大学医学院附属鼓楼医院脊柱外科 210008

目的比较成年Chiari Ⅰ畸形伴脊髓空洞患者与健康成人颈椎管结构的差异,探讨Chiari Ⅰ畸形患者颈椎管形态与脊髓空洞的相互关系.方法回顾性选取2008年1月至2015年6月接受手术治疗的ChiariⅠ畸形合并脊髓空洞（ChiariI malformation as... 详细信息

目的比较成年Chiari Ⅰ畸形伴脊髓空洞患者与健康成人颈椎管结构的差异,探讨Chiari Ⅰ畸形患者颈椎管形态与脊髓空洞的相互关系.方法回顾性选取2008年1月至2015年6月接受手术治疗的ChiariⅠ畸形合并脊髓空洞（ChiariI malformation associated with syringomyelia,CMS）患者48例,男21例,女27例;年龄18～47岁,平均24.6岁.另选取年龄、性别匹配的正常成人48例作为对照组.运用CT多平面重建技术,分别平行于各椎体平面进行重建,获取各椎体中间层面颈椎管横断面图像并测量其面积,进一步绘制散点图及趋势线,趋势线的斜率计为颈椎管面积锥度.比较两组研究对象颈椎管各节段横截面积及颈椎管面积锥度的差异.并在MRI上测量CMS患者颈椎各椎体中间层水平脊髓空洞的横截面积,采用线性回归方法分析颈椎各节段椎管面积与同水平脊髓空洞面积的相关性.结果 CMS组脊髓空洞主要分布于C4～7节段,其椎管面积在C3～C7水平明显大于对照组,且其椎管面积与同平面的脊髓空洞面积之间存在明显正性相关（r=0.676～0.765,P＜ 0.001）.对照组C1～C4、C4～C7、C1～C7椎管的面积锥度分别为（-58.5±29.9）mm2/节段、（-0.1 ±7.3）mm2/节段、（-25.6±6.8）mm2/节段,CMS组则分别为（-54.7±33.2）mm2/节段、（8.8±13.5）mm2/段、（-15±16.4） mm2/节段.两组的C1～C4面积锥度无明显差异;但CMS组C4～C7的面积锥度为正向（即C4～C7面积呈逐渐增大的趋势）,对照组为负向（即C1～C7面积趋势为逐渐减小）;两组C1～C7整体面积锥度虽均为负向,但CMS组明显小于对照组.结论成年ChiariⅠ畸形合并脊髓空洞患者颈椎管骨性结构在空洞累及节段明显扩大,且椎管大小与同水平脊髓空洞的大小直接相关;其下颈椎椎管面积锥度明显增大,提示ChiariⅠ畸形患者脊髓空洞对颈椎管的发育存在影响.

关键词：颈椎 Arnold-Chiari畸形脊髓空洞症椎管体层摄影术,螺旋计算机