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液晶弹性体智能材料的先进制造技术与结构设计

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液晶与显示 2025年第1期40卷 35-54页

作者：刘长岳袁凌昕杨继萍王志坚天目山实验室浙江杭州310023 北京航空航天大学材料科学与工程学院北京100191

液晶弹性体是一类由液晶基元和聚合物网络组成的智能软材料。在热、光或者电场等外部刺激下,液晶弹性体能够产生较大可逆变形,在软体机器人、人工肌肉、自传感系统以及生物医学设备等领域展示出巨大的应用潜力。近年来,随着制造技术的发... 详细信息

液晶弹性体是一类由液晶基元和聚合物网络组成的智能软材料。在热、光或者电场等外部刺激下,液晶弹性体能够产生较大可逆变形,在软体机器人、人工肌肉、自传感系统以及生物医学设备等领域展示出巨大的应用潜力。近年来,随着制造技术的发展,人们对液晶弹性体的加工方法和结构设计开展了广泛的探索。本文首先介绍了液晶弹性体3种常用的制备方法,讨论了它们的特点和局限性,总结了液晶弹性体加工制造技术最新的研究进展。进一步讨论了如何利用液晶弹性体的结构设计实现多种运动模式和快速致动。最后,对液晶弹性体存在的挑战和未来的发展趋势进行了展望和讨论。

关键词：液晶弹性体智能材料先进制造技术结构设计 3D打印

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基于Deform与nCode联合仿真的新淬火成形工艺参数对L型材疲劳寿命的影响研究

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热加工工艺 2025年第1期54卷 132-136页

作者：尚晓峰吕文政王志坚沈阳航空航天大学机电工程学院辽宁沈阳110136

以铝合金L型材的新淬火成形工艺为研究对象,应用Deform软件还原新淬火成形工艺过程,并得到了不同工艺参数下L型材的残余应力分布;将残余应力分布赋予到nCode软件中,并基于名义应力法对不同工艺参数下L型材的疲劳寿命进行预测,确定了最... 详细信息

以铝合金L型材的新淬火成形工艺为研究对象,应用Deform软件还原新淬火成形工艺过程,并得到了不同工艺参数下L型材的残余应力分布;将残余应力分布赋予到nCode软件中,并基于名义应力法对不同工艺参数下L型材的疲劳寿命进行预测,确定了最高抗疲劳性能下L型材的新淬火成形工艺参数:470℃固溶处理并保温40 min,20℃水温淬火,冲压速度为60 mm/s,一级时效为170℃/10 min,二级时效为120℃/20 min,并通过疲劳试验验证预测的准确性,为实际生产提供重要指导。

关键词： Deform nCode 淬火残余应力疲劳寿命

Short-Term Power Load Forecasting with Hybrid TPA-BiLSTM Prediction Model Based on CSSA

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Computer Modeling in Engineering & Sciences 2023年第7期136卷 749-765页

作者： Jiahao Wen zhijian wang School of Information Science Guangdong University of Finance and EconomicsGuangzhouChina

Since the existing prediction methods have encountered difficulties in processing themultiple influencing factors in short-term power load forecasting,we propose a bidirectional long short-term memory(BiLSTM)neural network model based on the temporal pattern attention(TPA)***,based on the grey relational analysis,datasets similar to forecast day are ***,thebidirectional LSTM layermodels the data of thehistorical load,temperature,humidity,and date-type and extracts complex relationships between data from the hidden row vectors obtained by the BiLSTM network,so that the influencing factors(with different characteristics)can select relevant information from different time steps to reduce the prediction error of the ***,the complex and nonlinear dependencies between time steps and sequences are extracted by the TPA mechanism,so the attention weight vector is constructed for the hidden layer output of BiLSTM and the relevant variables at different time steps are weighted to influence the ***,the chaotic sparrow search algorithm(CSSA)is used to optimize the hyperparameter selection of the *** short-term power load forecasting on different data sets shows that the average absolute errors of short-termpower load forecasting based on our method are 0.876 and 4.238,respectively,which is lower than other forecastingmethods,demonstrating the accuracy and stability of our model.

关键词： Chaotic sparrow search optimization algorithm TPA BiLSTM short-term power load forecasting grey relational analysis

TRIM dsDNA sensor to restrict innate immune response

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Cellular & Molecular Immunology 2013年第3期10卷 193-195页

作者： zhijian Cai Jianli wang Institute of Immunology Zhejiang UniversitySchool of Medicine Hangzhou China

The innate immune system, also known as the non-specific immune system, is the first line of defense utilized by the host to provide protection against infection by organisms. In order to combat infection by bacteria, viruses or fungi, host cells have evolved a repertoire of sophis- ticated systems to sense infection and trig- ger innate immune responses, through the engagement of Toll-like receptors （TLRs） or other pattern-recognition receptors on the cell surface.1 Upon the activation of pattern-recognition receptor, various immune responses are initiated,

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Resonance response of fluid-conveying pipe with asymmetric elastic supports coupled to lever-type nonlinear energy sink

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Applied Mathematics and Mechanics(English Edition) 2022年第12期43卷 1873-1886页

作者： Runqing CAO zhijian wang Jian ZANG Yewei ZHANG Faculty of Aerospace Engineering Shenyang Aerospace UniversityShenyang 110136China

This paper studies the vibration absorber for a fluid-conveying pipe,where the lever-type nonlinear energy sink(LNES)and spring supports are coupled to the asymmetric ends of the *** pseudo-arc-length method integrated with the harmonic balance method is used to investigate the steady-state responses ***,the numerical solution of the fluid-conveying pipe is calculated with the Runge-Kutta ***,a special response,called the collapsible closed detached response(CCDR),is first observed when the vibration response of mechanical structures is ***,the relationship between the CCDR and the main structure primary response(PR)is *** addition,the closed detached response(CDR)is also observed to research the resonance response of the fluid-conveying *** appearance of either the CCDR or the CDR does affect the resonance ***,the mentioned two phenomena underline that the trend of vibration responses under external excitation goes continuous and ***,the main advantage of the LNES is presented by contrasting the LNES with the nonlinear energy sink(NES)coupled to the same pipe *** is found that the LNES can reduce the resonance response amplitude by 91.33%.

关键词： fluid-conveying pipe vibration attenuation collapsible closed detached response(CCDR) lever-type nonlinear energy sink(LNES) elastic support

Improving the High Order Spectral Volume Formulation Using a Diffusion Regulator

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Communications in Computational Physics 2012年第6期12卷 247-260页

作者： Ravi Kannan zhijian wang CFD Research Corporation 215Wynn DriveHuntsvilleAL 35805USA Iowa State University Howe HallAmesIA 50011USA

The concept of diffusion regulation(DR)was originally proposed by Jaisankar for traditional second order finite volume Euler *** was used to decrease the inherent dissipation associated with using approximate Riemann *** this paper,the above concept is extended to the high order spectral volume(SV)*** DR formulation was used in conjunction with the Rusanov flux to handle the inviscid flux *** experiments were conducted to compare and contrast the original and the DR *** experiments demonstrated(i)retention of high order accuracy for the new formulation,(ii)higher fidelity of the DR formulation,when compared to the original scheme for all orders and(iii)straightforward extension to Navier Stokes equations,since the DR does not interfere with the discretization of the viscous *** general,the 2D numerical results are very promising and indicate that the approach has a great potential for 3D flow problems.

关键词： Diffusion regulation spectral volume high-order Rusanov flux Navier Stokes equations

Revealing the Role of Elementary Doping in Photocatalytic Phenol Mineralization

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Chinese Journal of Structural Chemistry 2022年第9期41卷 69-73页

作者： Houkui Xiang zhijian wang Jiazang Chen State Key Laboratory of Coal Conversion Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBejing 100049China

Photocatalytic mineralization of recalcitrant contaminants like phenol in wastewater requires abundant hydroxyl radicals(·OH) to initiate the reaction prior to the ring-opening. We here increase the free energy for adsorption of O~* species on TiOsurface and slightly downshift the band position by tin doping. This can simultaneously promote the generation and suppress the annihilation of ·OH. Besides, tin doping can also facilitate semiconductor-cocatalyst-solution(SCS) interfacial electron transfer by lowering the potential barrier and synergistically enhance the photon utilization. By filming the photocatalyst onto our developed fixed bed reactors, the loss of photons resulting from undesirable absorption by contaminants can be alleviated. By these virtues, trace amount of phenol in wastewater can be efficiently mineralized.

关键词： hole extraction interfacial electron transfer hydroxyl radical elementary doping photocatalytic mineralization

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地面分层注水井口分层注水量研究

机械设计与制造 2025年第2期 269-273,279页

作者：王志坚崔志豪黄雪琴尹欣然沈阳航空航天大学机电工程学院辽宁沈阳110136

对地面分层注水井口分层注水量进行研究。首先对地面分层注水井口三层注水的数学模型进行研究,通过有限元软件FLUENT进行CFD模拟计算得出4种不同工况下的各层注水量,同时建立三层注水实验平台,在实验平台上做与仿真相同工况的分层注水实... 详细信息

对地面分层注水井口分层注水量进行研究。首先对地面分层注水井口三层注水的数学模型进行研究,通过有限元软件FLUENT进行CFD模拟计算得出4种不同工况下的各层注水量,同时建立三层注水实验平台,在实验平台上做与仿真相同工况的分层注水实验,实验数据与仿真数据相互补充,确定模拟结果可靠后,进行全工况的正交模拟,得到全工况下的各层质量流量值。通过SPSS做相关性分析,得出各层质量流量值与三层流量调节阀开度的相关性矩阵,确认三个开度均可与各层注水量共同拟合后,用MATLAB将各层注水量与三层流量调节阀开度分别做线性多元拟合和非线性多元拟合,确定非线性多元拟合精度更高,最终得出各层注水量与三层流量调节阀开度的非线性模型多元拟合方程,为三层注水的技术开发提供理论参考与方法。

关键词：分层注水注水量 CFD模拟相关性分析非线性拟合

圆柱滚子轴承内圈挡边与滚子球基面的优化设计

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轴承 2025年第1期 55-60页

作者：王志坚宋佳伟李兴林李健常振常州大学江苏常州213164 杭州轴承试验研究中心有限公司杭州310022 浙江大学杭州310058 机械工业轴承产品质量检测中心(杭州) 杭州310022

考虑离心力、陀螺力矩、滚子偏斜以及套圈挡边与滚子球基面之间的润滑,建立联合载荷作用下圆柱滚子轴承力学分析模型,基于该模型分析了滚子球基面半径对轴承接触特性及发热量的影响,结果表明:随滚子球基面半径增大,接触点距离滚道表面越... 详细信息

考虑离心力、陀螺力矩、滚子偏斜以及套圈挡边与滚子球基面之间的润滑,建立联合载荷作用下圆柱滚子轴承力学分析模型,基于该模型分析了滚子球基面半径对轴承接触特性及发热量的影响,结果表明:随滚子球基面半径增大,接触点距离滚道表面越近,最大接触应力越小,发热量越少。基于轴承寿命理论对不同偏差的内、外圈挡边倾角和滚子球基面半径进行匹配优化,轴承寿命可提升约34%。

关键词：滚动轴承圆柱滚子轴承接触力发热量寿命加工误差