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7FDL-16柴油机气缸盖热结构耦合应力分析

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大连交通大学学报 2024年第2期45卷 63-67页

作者：李明海庄斌大连交通大学机车车辆工程学院辽宁大连116028

通过CATIA软件进行三维建模,利用Space Claim模块提取流体域,在Fluent模块设置流体边界条件并仿真流动,先后导入Ansys Workbench稳态热和静应力分析模块,设置热边界条件和应力载荷,得到气缸盖的温度场以及热结构耦合应力分布云图。热结... 详细信息

通过CATIA软件进行三维建模,利用Space Claim模块提取流体域,在Fluent模块设置流体边界条件并仿真流动,先后导入Ansys Workbench稳态热和静应力分析模块,设置热边界条件和应力载荷,得到气缸盖的温度场以及热结构耦合应力分布云图。热结构耦合应力分析可得:热应变最大处在火力面鼻梁区,最大变形量为0.002 1 mm,应力最大处在两排气门之间的鼻梁区,最大应力值为398 MPa,安全系数为2.71,满足实际结构工作的要求标准。

关键词：柴油机气缸盖热结构耦合应力分析热应变

Molecular insight into the GaP(110)-water interface using machine learning accelerated molecular dynamics

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Journal of Energy Chemistry 2023年第7期82卷 239-247,I0006页

作者： Xue-Ting Fan Xiao-Jian Wen Yong-bin zhuang Jun Cheng State Key Laboratory of Physical Chemistry of Solid Surfaces iChEMCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005FujianChina Shenzhen Research Institute of Xiamen University Shenzhen 518057GuangdongChina Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) Xiamen 361005FujianChina

GaP has been shown to be a promising photoelectrocatalyst for selective CO_(2)reduction to *** to the relevance of the interface structure to important processes such as electron/proton transfer,a detailed understanding of the GaP(110)-water interfacial structure is of great *** initio molecular dynamics(AIMD)can be used for obtaining the microscopic information of the interfacial ***,the GaP(110)-water interface cannot converge to an equilibrated structure at the time scale of the AIMD *** this work,we perform the machine learning accelerated molecular dynamics(MLMD)to overcome the difficulty of insufficient sampling by *** the help of MLMD,we unravel the microscopic information of the structure of the GaP(110)-water interface,and obtain a deeper understanding of the mechanisms of proton transfer at the GaP(110)-water interface,which will pave the way for gaining valuable insights into photoelectrocatalytic mechanisms and improving the performance of photoelectrochemical cells.

关键词： Photoelectrocatalysis GaP(110)-water interface Machine learning accelerated molecular dynamics

Y染色体短串联重复序列微流控芯片复合扩增检测体系研究

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生物化学与生物物理进展 2024年第3期51卷 696-705页

作者：王道宇万群庄斌赵丽健韩俊萍李彩霞中国人民公安大学侦查学院北京100038 山东第一医科大学基础医学院济南250000 北京博奥晶典生物技术有限公司北京101111 北京市公安局朝阳分局刑事侦查支队北京100025 公安部鉴定中心现场物证溯源技术国家工程实验室北京市现场物证检验工程技术研究中心北京100038

目的构建Y染色体短串联重复序列(Y-STR)微流控芯片扩增检测试剂,并进行性能验证,实现Y-STR基因座的快速全集成检测。方法使用Y-STR微流控芯片检测体系,对其灵敏度、成功率和分型准确率、峰平衡性、精准性和准确性、检材适应性、混合物... 详细信息

目的构建Y染色体短串联重复序列(Y-STR)微流控芯片扩增检测试剂,并进行性能验证,实现Y-STR基因座的快速全集成检测。方法使用Y-STR微流控芯片检测体系,对其灵敏度、成功率和分型准确率、峰平衡性、精准性和准确性、检材适应性、混合物检测能力和抗抑制性进行验证评估。结果DNA标准品9948的模板量≥8 ng,血卡片数≥3片以及口腔拭子刮擦次数≥7次时可获得Y-STR完整分型;165份样本的全集成检测成功率为91.52%,分型准确率为99.74%;不同荧光通道之间的峰高比值为89.81%;10次运行的等位基因分型标准品的片段大小标准差均在0.5 bp以内,20份样本全集成检测的等位基因片段和相应的等位基因标准品之间的片段准确性均在0.5 bp以内;能够对口腔拭子、血卡、唾液卡、烟蒂、血棉签、布片精斑等检材进行准确分型;混合样本中较小贡献者与较大贡献者在1∶3的比例时可获得完整基因分型;在不同浓度的腐殖酸(50~400 mg/L)、靛蓝(20~100 nmol/L)、血红蛋白(100~500μmol/L)等抑制物的干扰下,该体系可获得完整基因分型。结论该体系可应用于国产Quick TargSeq法医DNA现场快速检测系统使用,可在法医学实践中选用。

关键词：法医物证学微流控芯片 Y染色体短串联重复序列

A computational method for wide-azimuth 3D dip-angle gathers using Gaussian beam migration

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Petroleum Science 2022年第5期19卷 2081-2094页

作者： Su-bin zhuang Jian-Ping Huang Ji-Dong Yang Zhen-Chun Li School of Geosciences China University of Petroleum(East China)Qingdao266580ShandongChina

The dip-angle-domain common-image gather(DDCIG)is a key tool to separate the diffraction and reflection imaging *** with different spatial geometries produce different responses in *** with Kirchhoff migration,Gaussian beam migration(GBM)is more effective and robust to overcome the multipathing *** a ray-based method,it has explicit angle information naturally during the *** have developed a 3D DDCIG computational method using GBM,which obtain both the imaging result and angle-domain gathers with only one pass of *** angle-gather computation is based on geometrical optics,and multiple angle conversions are implemented under the rules of space geometry,which helps to avoid rounding errors and improve ***,the multi-azimuth joint presentation strategy is proposed to describe the characteristic of omnidirectional dip angles using a finite number of *** using a 2D model to illustrate application advantages of DDCIG,we apply the proposed method to two 3D models to test its feasibility and accuracy.A field data example further demonstrates the adaptability of our method to seismic imaging for a land survey.

关键词： Gaussian beam Dip-angle gathers 3D imaging Diffraction

Patterned phosphor-in-glass films with efficient thermal management for high-power laser projection displays

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Journal of Advanced Ceramics 2023年第11期12卷 2075-2086页

作者： Zezhong Yang Song Zheng Guoyu Xi Tao Pang Shaoxiong Wang Qingying Ye bin zhuang Daqin Chen College of Physics and Energy Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy MaterialsFujian Normal UniversityFuzhou 350117China Huzhou Key Laboratory of Materials for Energy Conversion and Storage College of ScienceHuzhou UniversityHuzhou 313000China Fujian Provincial Collaborative Innovation Center for Advanced High-Field Superconducting Materials and Engineering Fujian Normal UniversityFuzhou 350117China Fujian Provincial Engineering Technology Research Center of Solar Energy Conversion and Energy Storage Fujian Normal UniversityFuzhou 350117China

Recently,high-performance color converters excitable by blue laser diode(LD)have sprung up for projection ***,the thermal accumulation effect of the color converters is a non-negligible problem under high-power LD ***,we developed novel opto-functional composites(patterned CaAlSiN3:Eu^(2+)phosphor-in-glass film–Y_(3)Al_(5)O_(12):Ce^(3+)phosphor-in-glass film@Al_(2)O_(3)plate with aluminum"heat sink")via a thermal management methodology of combining"phosphor wheel"and"heat sink"for a lighting source of highpower laser projection *** new composite design makes it effective to transport generated thermal phonons away to reduce the thermal ionization process,and to yield stable and high-quality white light with brightness of 4510 lm@43 W,luminous efficacy of 105 lm/W,correlated color temperature of 3541 K,and color rendering index of ***,the phosphor-in-glass film-converted laser projection system was also successfully designed,showing a more vivid color effect compared to a traditional LED-based *** work emphasizes the importance of the thermal management upon high-power laser irradiation,and hopefully facilitates the development of a new LD-driven lighting source for high-power laser projection displays.

关键词： phosphor-in-glass(PiG)film laser-driven lighting luminescent materials heat dissipation glass ceramics

A fast space-time-domain Gaussian beam migration approach using the dominant frequency approximation

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Petroleum Science 2022年第4期19卷 1555-1565页

作者： Dong-Lin Zhang Jian-Ping Huang Ji-Dong Yang Zhen-Chun Li Su-bin zhuang Qing-Yang Li School of Geosciences China University of Petroleum(East China)QingdaoShandong 266580China Pilot National Laboratory for Marine Science and Technology QingdaoShandong 266580China Geophysical Exploration Research Institute of Zhongyuan Oilfield Company PuyangHenan 457001China

The Gaussian beam migration(GBM) is a steady imaging approach, which has high accuracy and efficiency. Its implementation mainly includes the traditional frequency domain and the recent popular space-time domain. Firstly, we use the upward ray tracing strategy to get the backward wavefields. Then,we use the dominant frequency of the seismic data to simplify the imaginary traveltime calculation of the wavefields, which can cut down the Fourier transform number compared with the traditional GBM in the space-time domain. In addition, we choose an optimized parameter for the take-off angle increment of the up-going and down-going rays. These optimizations help us get an efficient space-time-domain acoustic GBM approach. Typical four examples show that the proposed method can significantly improve the computational efficiency up to one or even two orders of magnitude in different models with different model parameters and produce good imaging results with comparable accuracy and resolution with the traditional GBM in the space-time domain.

关键词： Gaussian beam Space-time-domain Fast Dominant frequency approximation

Development of X-FEM methodology and study on mixed-mode crack propagation

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Acta Mechanica Sinica 2011年第3期27卷 406-415页

作者： Zhuo zhuang bin-bin Cheng School of Aerospace Tsinghua University 100084 Beijing China

The extended finite element method（X-FEM） is a novel numerical methodology with a great potential for using in multi-scale computation and multi-phase coupling problems. The algorithm is discussed and a program is developed based on X-FEM for simulating mixed-mode crack propagation. The maximum circumferential stress criterion and interaction integral are deduced. Some numerical results are compared with the experimental data to prove the capability and efficiency of the algorithm and the program. Numerical analyses of sub-interfacial crack growth in bi-materials give a clear description of the effiect on fracture made by interface and loading condition.

关键词： X-FEM - Mixed-mode fracture . Bi-material Sub-interfacial crack

南方某市公租房室内挥发性有机化合物的污染特征及健康风险研究

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广东化工 2024年第4期51卷 98-102页

作者：庄斌韩琦王小江刘洋林武刘淘陶深圳市生态环境局龙岗管理局广东深圳518000 深圳市环境科学研究院广东深圳518001

为了解新装修公租房室内空气中的污染特征及评估其环境健康风险,本研究对南方某市公租房室内挥发性有机化合物(VOCs)的多组分化学物质(33项指标)进行了分析,在此基础上筛选出检出频繁、毒性较高、含量较高的典型VOCs,并讨论了其在不同... 详细信息

为了解新装修公租房室内空气中的污染特征及评估其环境健康风险,本研究对南方某市公租房室内挥发性有机化合物(VOCs)的多组分化学物质(33项指标)进行了分析,在此基础上筛选出检出频繁、毒性较高、含量较高的典型VOCs,并讨论了其在不同功能区域、不同楼层、不同装修时间的污染特征,最后,对典型VOCs的致癌和非致癌风险进行评估。结果表明,筛选得到5种典型有毒有害化学物质,分别是苯、乙苯、间,对-二甲苯、1,1,2,2-四氯乙烷、甲醛;公租房装修程度越低、楼层升高、装修时间延长,污染物浓度越来越低;不同年龄人群的致癌风险评估可知,1,1,2,2-四氯乙烷、甲醛的致癌风险均超过1×10^(-6),该风险值不可忽略,且年龄越小、致癌风险越大;非致癌风险评估可知,苯、乙苯、间,对-二甲苯、甲醛的非致癌风险分别为3.3×10^(-3)、9.8×10^(-4)、4.7×10^(-4)、1.99,即甲醛存在非致癌健康风险。

关键词：公租房挥发性有机化合物健康风险评价致癌风险非致癌风险

Coexpression of TLR9 and VEGF-C is associated with lymphatic metastasis in prostate cancer

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Asian Journal of Andrology 2022年第4期24卷 380-385页

作者： Xian-Zi Zeng Zhan-Sen Huang Hong-Peng Fang Jie-Ying Wu Qun-Xiong Huang Chu-bin zhuang Jing Zhou Jin-Ming Di Department of Urology The Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhou 510630China Department of Infertility and Sexual Medicine The Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhou 510630China Department of Pathology The Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhou 510630China

Prostate cancer(PCa)is one of the most frequent cancers in men,and its biomolecular targets have been extensively *** study aimed to analyze the expression of toll-like receptor 9(TLR9)and vascular endothelial growth factor C(VEGF-C)and the clinical value of the coexpression of TLR9 and VEGF-C in *** retrospectively evaluated 55 patients with clinically localized,intermediate-risk,or high-risk PCa who underwent laparoscopic radical prostatectomy(LRP)and extended pelvic lymph node dissection(ePLND)without neoadjuvant hormonal therapy at a single institution from June 2013 to December *** all 55 patients,the median number of lymph nodes(LNs)resected was 23(range:18-31),and a total of 1269 LNs were removed,of which 78 LNs were *** patients had positive LNs,with a positive rate of 30.9%.In addition,the immunohistochemical results in the above patients revealed that high TLR9 expression was correlated with higher Gleason score(GS)(P=0.049),increased LN metastasis(P=0.004),and more perineural invasion(PNI)(P=0.033).Moreover,VEGF-C expression was associated with GS(P=0.040),pathological stage(pT stage)(P=0.022),LN metastasis(P=0.003),and PNI(P=0.001).Furthermore,a significant positive correlation between TLR9 and VEGF-C was found(P<0.001),and the TLR9/VEGF-C phenotype was associated with LN metastasis(P=0.047).Collectively,we propose that TLR9 stimulation may promote LN metastasis in PCa cells through the upregulation of VEGF-C expression,thereby affecting the prognosis of PCa ***,these markers may serve as valuable targets for the treatment of PCa.

关键词： biochemical progression-free survival coexpression lymphatic metastasis prostate cancer toll-like receptor 9 vascular endothelial growth factor C