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热敏打印机底壳注塑模具设计及工艺优化

塑料科技 2025年第1期53卷 152-156页

作者：田玉晶董浩孙晓宇哈尔滨理工大学威海研究院山东荣成264300 哈尔滨理工大学荣成学院山东荣成264300

分析热敏打印机底壳的结构特点,利用UG及Moldflow软件进行建模并模拟注塑成型过程。结果表明:浇口位置由底部中心改为螺纹装配孔处能够有效避免试模时产生的熔接痕,填充效果良好。根据模流分析结果得出,最佳熔体温度为200℃,最佳模具温... 详细信息

分析热敏打印机底壳的结构特点,利用UG及Moldflow软件进行建模并模拟注塑成型过程。结果表明:浇口位置由底部中心改为螺纹装配孔处能够有效避免试模时产生的熔接痕,填充效果良好。根据模流分析结果得出,最佳熔体温度为200℃,最佳模具温度为80℃,最佳注射时间为0.1s。冷却方式采取带有隔水板的冷却系统,模拟结果显示成型质量符合要求。模具结构采用一模两腔布局,功能动作为一次开模,一次顶出,四向一次抽芯。模具结构整体布局合理,利用该模具生产的注塑制件表面质量及精度均满足设计要求。

关键词：注塑成型热敏打印机底壳 Moldflow UG 模具设计

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退火对冷轧430铁素体不锈钢显微组织与力学性能的影响

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过程工程学报 2025年第1期25卷 70-79页

作者：徐帅康孙晓宇陈琳李景辉张明亚安徽工业大学冶金工程学院安徽马鞍山243002 安徽工业大学材料科学与工程学院安徽马鞍山243002

采用55%的压下量对430铁素体不锈钢进行室温冷轧变形后,分别在800,850,900,950,1000℃进行保温退火处理15 min,采用原位拉伸和纳米压痕测试,并且利用场发射扫描电子显微镜(SEM)、电子背散射衍射(EBSD)、透射电子显微镜(TEM)等技术手段... 详细信息

采用55%的压下量对430铁素体不锈钢进行室温冷轧变形后,分别在800,850,900,950,1000℃进行保温退火处理15 min,采用原位拉伸和纳米压痕测试,并且利用场发射扫描电子显微镜(SEM)、电子背散射衍射(EBSD)、透射电子显微镜(TEM)等技术手段研究了430铁素体不锈钢的微观组织和力学性能影响及其规律。结果表明,当退火温度由800℃升高至850℃时,试样冷轧组织再结晶率逐渐提高,由66%提高至68%,平均晶粒尺寸明显减小,由9.23μm减小至8.07μm,此时试样组织主要受到了晶粒细化的作用,试样强塑性提高。当退火温度从900℃升高到1000℃时,冷轧组织再结晶率进一步提高,由71%提高至89%,平均晶粒尺寸增大约1.5倍,位错密度显著降低,强度下降,塑性增强,硬度明显降低。样品在850℃退火时,晶粒细小均匀,屈服强度达到882 MPa,伸长率达到17.5%,此时硬度值为2.08 GPa,具有较好的微观组织及力学性能,因此在850℃保温退火15 min为430铁素体不锈钢的理想退火工艺。

关键词：铁素体不锈钢再结晶位错密度力学性能

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ESG表现、动态能力与财务绩效

科技创业月刊 2025年第1期38卷 29-35页

作者：刘艳莉孙晓宇哈尔滨商业大学商务学院黑龙江哈尔滨150028

社会和经济的可持续发展备受重视,促使ESG理念逐渐成为全球主流和共识。以2009-2022年沪深A股上市公司为样本,检验企业ESG表现对财务绩效的影响,并验证动态能力在其中的中介作用。检验发现,企业ESG表现对财务绩效呈显著的积极作用,从总... 详细信息

社会和经济的可持续发展备受重视,促使ESG理念逐渐成为全球主流和共识。以2009-2022年沪深A股上市公司为样本,检验企业ESG表现对财务绩效的影响,并验证动态能力在其中的中介作用。检验发现,企业ESG表现对财务绩效呈显著的积极作用,从总体上来看,动态能力在企业ESG表现与财务绩效之间起到了中介作用。因此,企业应充分认识ESG的战略意义,积极履行ESG,同时获取关键资源发展自身动态能力,以增强其在企业ESG与财务绩效之间的传导作用。

关键词： ESG表现财务绩效动态能力

An elastic model for bioinspired design of carbon nanotube bundles

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Acta Mechanica Sinica 2015年第2期31卷 205-215页

作者： xiaoyu sun Zuoqi Zhang Yuanjie Xu Yongwei Zhang School of Civil Engineering Wuhan University Institute of High Performance Computing A*STARSingapore 138632Singapore

Collagen fibers provide a good example of making strong micro-or mesoscale fibers from nanoscale tropocollagen molecules through a staggered and crosslinked organization in a bottom-up *** the architectural features of collagen fibers has been shown to be a promising approach to develop carbon nanotube（CNT）fibers of high *** the present work,an elastic model is developed to describe the load transfer and failure propagation within the bioinspired CNT bundles,and to establish the relations of the mechanical properties of the bundles with a number of geometrical and physical parameters such as the CNT aspect ratio and longitudinal gap,interface cross-link density,and the functionalizationinduced degradation in CNTs,*** the model,the stress distributions along the CNT-CNT interface as well as in every individual CNT are well captured,and the failure propagation along the interface and its effects on the mechanical properties of the CNT bundles are *** work may provide useful guidelines for the design of novel CNT fibers in practice.

关键词： Carbon nanotube fiber Collagen-mimic design Staggered pattern Interface modification

Broad strategies for neutralizing SARS-CoV-2 and other human coronaviruses with monoclonal antibodies

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Science China(Life Sciences) 2023年第4期66卷 658-678页

作者： Zhiyang Ling Chunyan Yi xiaoyu sun Zhuo Yang Bing sun State Key Laboratory of Cell Biology Shanghai Institute of Biochemistry and Cell BiologyCenter for Excellence in Molecular Cell ScienceChinese Academy of SciencesShanghai 200031China University of Chinese Academy of Sciences Beijing 100049China School of Life Science and Technology ShanghaiTech UniversityShanghai 201210China

Antibody therapeutics and vaccines for coronavirus disease 2019(COVID-19)have been approved in many countries,with most being developed based on the original strain of severe acute respiratory syndrome coronavirus 2(SARS-CoV-2).SARS-CoV-2 has an exceptional ability to mutate under the pressure of host immunity,especially the immune-dominant spike protein of the virus,which is the target of both antibody drugs and *** the continuous evolution of the virus and the identification of critical mutation sites,the World Health Organization(WHO)has named 5 variants of concern(VOCs):4 are previously circulating VOCs,and 1 is currently circulating(Omicron).Due to multiple mutations in the spike protein,the recently emerged Omicron and descendent lineages have been shown to have the strongest ability to evade the neutralizing antibody(NAb)effects of current antibody drugs and *** development and characterization of broadly neutralizing antibodies(bNAbs)will provide broad strategies for the control of the sophisticated virus *** this review,we describe how the virus evolves to escape NAbs and the potential neutralization mechanisms that associated with *** also summarize progress in the development of bNAbs against SARS-CoV-2,human coronaviruses(CoVs)and other emerging pathogens and highlight their scientific and clinical significance.

关键词： antibody therapy broad neutralizing antibody human coronaviruses SARS-CoV-2

Tibetan Plateau Relict Snakes of the Genus Thermophis and Their Relationship to New World Relict Snakes

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Asian Herpetological Research 2011年第3期2卷 161-168页

作者： xiaoyu sun Shaoying LIU Song HUANG College of Life and Environment Sciences Huangshan University Institute of Biodiversity and Geobiology Department of Life SciencesTibet University State Key Laboratory of Genetic Resources and Evolution Kunming Institute of ZoologyChinese Academy of Sciences Sichuan Academy of Forestry

The complete mitochondrial NADH dehydrogenase subunit 2(ND2) gene sequences of two species of Thermophis, T. baileyi and T. zhaoermii, were sequenced and compared to those of 86 sequences from other snakes(74 from Caenophidia and 12 from Henophidia). By using Bayesian inference(BI) and maximum likehood(ML) approaches, Thermophis was demonstrated as the sister group to the North American relicts of Dipsadinae, and rooted in Central and South American members of this subfamily. The results suggest that the closest relatives of Thermophis are the North American relicts, and thus support the hypothesis for an Asian-North American origin of xenodontine snakes as suggested by Vidal et al.(2000). Extensive sampling of Asian snakes and American dipsadines is needed to further test this hypothesis in the future.

关键词： Thermophis Tibet Dipsadinae ND2 Asian-North American origin

Jigsaw puzzle of SARS-CoV-2 RBD evolution and immune escape

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Cellular & Molecular Immunology 2022年第7期19卷 848-851页

作者： Chunyan Yi xiaoyu sun Zhiyang Ling Bing sun State Key Laboratory of Cell Biology Shanghai Institute of Biochemistry and Cell BiologyCenter for Excellence in Molecular Cell ScienceChinese Academy of SciencesUniversity of Chinese Academy of SciencesShanghai 200031China School of Life Science and Technology ShanghaiTech University100 Haike RoadShanghai 201210China

The outbreak of severe acute respiratory syndrome coronavirus 2(SARS-CoV-2),which causes coronavirus disease 2019(COVID-19),has posed a tremendous threat to global health,resulting in over 510 million infections and at least 6.23 million deaths worldwide as of early May *** efforts to fight against the SARS-CoV-2 pandemic have accelerated the research and clinical development of various vaccines and neutralizing antibodies(NAbs)[1,2].However,SARS-CoV-2 has an exceptional ability to mutate and evade the human immune system,which highlights the surveillance of SARS-CoV-2 evolution to anticipate and facilitate a timely response to new variants that could impact viral transmissibility and the efficacy of vaccines and antibody therapies[3].

关键词： acute respiratory evolution

Comparison of the osteogenic capability of rat bone mesenchymal stem cells on collagen,collagen/hydroxyapatite,hydroxyapatite and biphasic calcium phosphate

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Regenerative Biomaterials 2018年第2期5卷 93-103页

作者： xiaoyu sun Wen Su Xiaomin Ma Huaiying Zhang Zhe sun Xudong Li National Engineering Research Center for Biomaterials Sichuan UniversityChengdu 610064P.R.China

Collagen(COL),collagen/hydroxyapatite(COL/HA),HA and biphasic calcium phosphate were prepared as representative bone grafting materials with composition analogous to bone,and their structural characteristics were *** rat bone mesenchymal stem cells(BMSCs)were further seeded onto four groups of materials,and BMSCs grown in basic medium and standard osteogenic medium were set as controls of a reference model to show the basic and osteogenic behavior of cells without the intervention of *** behaviors were characterized,including proliferation,spreading morphology and expression of osteogenesis *** rat BMSCs proliferated properly with time on four groups of materials as well on two groups of controls,and typical cuboidal,polygonal and extremely-elongated morphologies of cells were *** to the real-time polymerase chain reaction data,a higher osteogenic gene expression level was dependent upon the growing morphology but not the proliferation rate of cells,and the osteogenic differentiation capacity of cells onto four groups of materials varied in specific *** general,BMSCs exhibited the highest osteogenic capacity onto COL/HA,but the poorest onto *** growing behaviors of cells on materials were further discussed in comparison with the cases of OC and BC of the reference *** present attempt to comparatively analyze cell experimental data with a reference model is expected to be useful for revealing the difference in the osteogenic capability of MSCs onto materials or even the bioactivity of materials.

关键词： osteogenic differentiation spreading morphology mineralization of collagen bioceramics

Design of low-pass filter with 3-interations Koch fractal Pi-shaped DGS

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The Journal of China Universities of Posts and Telecommunications 2018年第3期25卷 92-96页

作者： Han Yunan Yuan Siyu sun xiaoyu Mei Chaofan College of Information Science and Technology Beijing University of Chemical Technology International School Beijing University of Posts and Telecommunications

A novel asymmetrical Pi-shaped defected ground structure （DGS） with 3-interations Koch fractal curves is proposed to design a microstrip low-pass filter （LPF） with uhra-wide stop-band （SB）. The proposed LPFs with a single resonator and two cascaded resonators are both designed, simulated, manufactured and measured. Simulation and experiment results demonstrate that the designed LPF has a very sharp transition band （TB） and an ultra-wide SB performance compared with the existed similar symmetrical and asymmetrical DGS. The proposed LPF with two cascaded resonators is with a compact size of 36. 8 mm x 24.0 mm, a very low insertion loss of less than 0.7 dB under 1.9 GHz, and a wide SB from 2.2 GHz to 8 GHz with rejection of larger than 30 dB.

关键词： low-pass filter defected ground structure Koch fractal curve broad stop-band