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Optimizing Real-Time Performance of 3D Virtual Mining Environment with MultiGen Creator

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Computer Aided Drafting,Design and Manufacturing 2004年第1期14卷 61-69页

作者： WANGWei-chen jiANGXiao-hong HANKe-qi hanwen-ji ChinaUniversityofMiningandTechnology Xuzhou221008China XuzhouNormalUniversity Xuzhou221011China

System optimization plays a crucial role in developing VR system after 3D modeling, affecting the system's Immersion and Interaction performance enormously. In this article, several key techniques of optimizing a virtual mining system were discussed: optimizing 3D models to keep the polygon number in VR system within target hardware's processing ability; optimizing texture database to save texture memory with perfect visual effect; optimizing database hierarchy structure to accelerate model retrieval; and optimizing LOD hierarchy structure to speed up rendering.

关键词： virtual mining system real-time performance optimization MultiGen creator

天山胜利隧道穿越博-阿断裂段抗错断性能研究

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震灾防御技术 2023年第2期18卷 235-242页

作者：刘继国崔庆龙舒恒彭文波吉瀚文中交第二公路勘察设计研究院有限公司武汉430056 华中科技大学土木与水利工程学院武汉430074

目前针对超挖、铰接与减震层组合设计对走滑断层隧道抗错断损伤特征的研究尚不明确,为此以天山胜利隧道穿越博罗科努-阿其克库都克断裂为实际工程背景,采用可表征泡沫混凝土力学行为的塑性本构模型模拟减震层泡沫混凝土受压行为,建立精... 详细信息

目前针对超挖、铰接与减震层组合设计对走滑断层隧道抗错断损伤特征的研究尚不明确,为此以天山胜利隧道穿越博罗科努-阿其克库都克断裂为实际工程背景,采用可表征泡沫混凝土力学行为的塑性本构模型模拟减震层泡沫混凝土受压行为,建立精细化三维数值模型,评估隧道在超挖、铰接与减震层组合设计工况下的纵向位移、衬砌断面损伤和应力分布特征,得出采用超挖、铰接与减震层组合设计时的走滑断层隧道力学响应及破坏特征。研究结果表明,隧道受断层活动影响呈现S形变形,在断层滑动面附近隧道变形较大;走滑断层作用下衬砌损伤集中在拱腰及45°共轭方向,衬砌内力随着断层错动量的增加而增大;通过超挖、铰接与减震层的组合设计,能够较好地减轻隧道二次衬砌破坏。

关键词：隧道活断层抗错断减震层柔性铰接泡沫混凝土

基于分子动力学模拟的铜-石墨烯复合材料耐烧蚀性能提升方法

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中国电机工程学报 2024年第6期44卷 2496-2506,I0035页

作者：丛浩熹周阳乔力盼姬振宇王健任瀚文李庆民新能源电力系统国家重点实验室(华北电力大学) 北京市昌平区102206

直线推进机构的轨道因滑动电弧烧蚀严重易导致发射失败,研究新的耐烧蚀金属材料是提高发射效率的关键,目前鲜有性能优异的铜-石墨烯复合材料(CuGr)在极端工况下滑动电弧烧蚀的研究。该文对石墨烯层叠式分布CuGr模型进行分子动力学模拟,... 详细信息

直线推进机构的轨道因滑动电弧烧蚀严重易导致发射失败,研究新的耐烧蚀金属材料是提高发射效率的关键,目前鲜有性能优异的铜-石墨烯复合材料(CuGr)在极端工况下滑动电弧烧蚀的研究。该文对石墨烯层叠式分布CuGr模型进行分子动力学模拟,揭示模拟烧蚀中模型表层温度和材料微观结构的演变规律,并提出石墨烯在材料中合适的掺杂方式。结果表明:石墨烯质量分数越高,层数越少,CuGr导热性能越好。石墨烯能有效的减少轰击最大侵入距离。基体中石墨烯也可阻挡位错深入,不引起反尺寸效应时石墨烯层数越多,质量分数越大,应变残留深度越小。石墨烯可以降低最终侵蚀坑的深度和减少基体材料的质量损失,CuGr模型的侵蚀坑深度类似,质量损失方面各模型相差较小但随着层数增加呈现减小趋势,且都优于Cu模型。综合对比模拟结果,效果最优的是石墨烯6层分布Cu Gr1%。上述结果可揭示铜-石墨烯复合材料耐烧蚀作用规律和微观机理,为制备耐烧蚀性能更高的CuGr材料提供理论依据和技术支持。

关键词：滑动电弧石墨烯分子动力学模拟铜-石墨烯复合材料耐电弧烧蚀

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负载酞菁钴电催化CO_(2)还原的第一性原理研究

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广州化学 2023年第4期48卷 61-65页

作者：时慧慧张雨暄吴相坛纪瀚文程平上海理工大学材料与化学学院上海200093

利用密度泛函理论研究了酞菁钴(CoPc)和五种不同载体(有金属活性中心的N掺杂的C材料(Ir-NC)、N掺杂的C材料(NC)、黑磷(BP)以及TiN、TiC)对催化性能的影响。先探究了CoPc催化CO_(2)还原成CO的性能,又探究了五种不同载体对CoPc催化CO_(2)... 详细信息

利用密度泛函理论研究了酞菁钴(CoPc)和五种不同载体(有金属活性中心的N掺杂的C材料(Ir-NC)、N掺杂的C材料(NC)、黑磷(BP)以及TiN、TiC)对催化性能的影响。先探究了CoPc催化CO_(2)还原成CO的性能,又探究了五种不同载体对CoPc催化CO_(2)还原为CO反应活性的影响。计算结果显示,CoPc与载体之间是弱相互作用,通过对优化后的结构进行吉布斯自由能计算证明了这五种载体都能显著降低COOH形成这一步的能垒,其中TiN能使该步能垒降低0.547 eV。除NC外,其余载体都促使CO脱附步骤的|ΔG|变得更小。这些结果表明不同载体能不同程度的调控CoPc的催化反应活性。

关键词： CO_(2)还原酞菁钴载体 Ir-NC NC TiN TiC 黑磷第一性原理研究

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黑龙江省早春野生花卉种质资源引种观察

园艺学报 2000年第6期27卷 433-438页

作者：邢淑清纪汉文哈尔滨学院生物系哈尔滨150086 黑龙江农垦师范专科学校阿城150301

引种驯化栽培早春野生花卉 2 9种 ,其中木本 14种 ,草本 15种。主要特点是耐寒性强 ,休眠期能耐 - 4 0℃低温 ,幼芽萌动期耐 - 10～ - 15℃ ,花期耐 0～ - 8℃ ,甚至花朵可迎雪盛开 ,寒冻红果不落。这些早春野生花卉从 3月中旬开始陆续... 详细信息

引种驯化栽培早春野生花卉 2 9种 ,其中木本 14种 ,草本 15种。主要特点是耐寒性强 ,休眠期能耐 - 4 0℃低温 ,幼芽萌动期耐 - 10～ - 15℃ ,花期耐 0～ - 8℃ ,甚至花朵可迎雪盛开 ,寒冻红果不落。这些早春野生花卉从 3月中旬开始陆续进入花期 ,花型多样 ,花色丰富 ,可作为城市、农村绿化的主体材料。

关键词：野生花卉种质资源抗寒性

Designed synthesis of ordered mesoporous graphene spheres from colloidal nanocrystals and their application as a platform for high-performance lithium-ion battery composite electrodes

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Nano Research 2016年第12期9卷 3757-3771页

作者： Huijuan Yu Guannan Guo Li ji hanwen Li Dong Yang jianhua Hu Angang Dong State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science Fudan University Shanghai 200433 China Collaborative Innovation Center of Chemistry for Energy Materials Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials and Department of Chemistry Fudan University Shanghai 200433 China

Three-dimensional （3D） graphene has recently attracted enormous attention for electrochemical energy storage applications. However, current methods suffer from an inability to simultaneously control and engineer the porosity and morphology of the graphene frameworks. Here, we report the designed synthesis of ordered mesoporous graphene spheres （OMGSs） by transformation of self-assembled Fe3O4 nanocrystal superlattices. The resultant OMGSs have an ultrathin framework comprising few-layered graphene, with highly ordered and interconnected mesoporosity and a high surface area. These advantageous structural and textural features, in combination with the excellent electrical conductivity of the graphitic frameworks, render the OMGSs an ideal and general platform for creating hybrid materials that are well suited for use as composite electrodes in lithium-ion batteries （LIBs）. As a proof-of-concept demonstration, SnO2 and GeO2 nanoparticles are incorporated into the OMGSs to afford SnO2@OMGSs and GeO2@OMGSs, respectively, both of which exhibit outstanding lithium storage properties when used as LIB anodes.

关键词： nanocrystals ordered mesoporousgraphene spheres nanocrystal superlattices self-assembly lithium-ion battery

A Convenient and Biosafe Replicon with Accessory Genes of SARS-CoV-2 and Its Potential Application in Antiviral Drug Discovery

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Virologica Sinica 2021年第5期36卷 913-923页

作者： Yun-Yun jin hanwen Lin Liu Cao Wei-Chen Wu Yanxi ji Liubing Du Yiling jiang Yanchun Xie Kuijie Tong Fan Xing Fuxiang Zheng Mang Shi ji-An Pan Xiaoxue Peng Deyin Guo The Center for Infection and Immunity Study School of MedicineSun Yat-sen UniversityGuangming Science CityShenzhen 518107China

SARS-CoV-2 causes the pandemic of COVID-19 and no effective drugs for this disease are available thus *** to the high infectivity and pathogenicity of this virus,all studies on the live virus are strictly confined in the biosafety level 3(BSL3)laboratory but this would hinder the basic research and antiviral drug development of SARS-CoV-2 because the BSL3 facility is not commonly available and the work in the containment is costly and *** this study,we constructed a reverse genetics system of SARS-CoV-2 by assembling the viral cDNA in a bacterial artificial chromosome(BAC)vector with deletion of the spike(S)*** of the cDNA into cells results in the production of an RNA replicon that keeps the capability of genome or subgenome replication but is deficient in virion assembly and infection due to the absence of S ***,such a replicon system is not infectious and can be used in ordinary biological *** confirmed the efficient replication of the replicon by demonstrating the expression of the subgenomic RNAs which have similar profiles to the wild-type *** mutational analysis of nsp12 and nsp14,we showed that the RNA polymerase,exonuclease,and cap N7 methyltransferase play essential roles in genome replication and sgRNA *** also created a SARS-CoV-2 replicon carrying a luciferase reporter gene and this system was validated by the inhibition assays with known anti-SARS-CoV-2 ***,such a one-plasmid system is biosafe and convenient to use,which will benefit both fundamental research and development of antiviral drugs.

关键词： SARS-CoV-2 Reverse genetics Replicon Antiviral drug screening

基于CS-FastICA的超导电磁数据消噪方法研究

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仪器仪表学报 2023年第8期44卷 109-117页

作者：高全明张瀚文侯宇丹张嘉宸嵇艳鞠吉林大学仪器科学与电气工程学院长春130061 中国科学院上海微系统与信息技术研究所信息功能材料国家重点实验室上海200050

超导电磁探测极易受到环境电磁噪声的干扰,严重影响了数据的解释精度。针对这一问题,提出了一种基于信噪分离消噪原理的超导电磁噪声抑制方法。该方法首先利用FastICA算法从观测信号中分离提取二次磁场信号,然后针对信号分离后的幅值不... 详细信息

超导电磁探测极易受到环境电磁噪声的干扰,严重影响了数据的解释精度。针对这一问题,提出了一种基于信噪分离消噪原理的超导电磁噪声抑制方法。该方法首先利用FastICA算法从观测信号中分离提取二次磁场信号,然后针对信号分离后的幅值不确定性问题,基于最大化非高斯性和最小畸变准则构建优化约束模型,最后利用CS搜索算法迭代求解分离矩阵的最优参数值。仿真结果显示,本文方法在信噪比和均方误差指标上均优于PCA、WA和ICA方法,消噪后信号的信噪比提高了16.6 dB。现场实验表明,本文方法对多种环境电磁噪声均具有良好的抑制效果,消噪后观测信有效时间提高了近4倍。观测信号质量得到了显著改善,视电阻率成像解释深度达1000 m,充分验证了本文方法的有效性和实用性。

关键词：超导电磁探测技术电磁噪声信噪分离幅值不确定性问题

Robust Carbonated Structural Color Barcodes with Ultralow Ontology Fluorescence as Biomimic Culture Platform

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Research 2021年第1期2021卷 1354-1366页

作者： Panmiao Liu Zhongde Mu Muhuo ji Xiaojiang Liu hanwen Gu Yi Peng jianjun Yang Zhuoying Xie Fuyin Zheng Department of Anesthesiology Pain and Perioperative MedicineThe First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina 450052 jiangsu Cancer Hospital&jiangsu Institute of Cancer Research&The Affiliated Cancer Hospital of Nanjing Medical University Nanjing 210009China Department of Anesthesiology The Second Affiliated HospitalNanjing Medical UniversityNanjingChina State Key Laboratory of Bioelectronics School of Biological Science and Medical EngineeringSoutheast UniversityNanjingChina 210096 Key Laboratory for Biomechanics and Mechanobiology Beijing Advanced Innovation Center for Biomedical EngineeringSchool of Biological Science and Medical EngineeringBeihang UniversityBeijing 100083China

Photonic crystal(PC)barcodes are a new type of spectrum-encoding microcarriers used in multiplex high-throughput bioassays,such as broad analysis of biomarkers for clinical diagnosis,gene expression,and cell ***,most of these existing PC barcodes suffered from undesired features,including difficult spectrum-signal acquisition,weak mechanical strength,and high ontology fluorescence,which limited their development to real *** address these limitations,we report a new type of structural color-encoded PC *** barcodes are fabricated by the assembly of monodisperse polydopamine-(PDA-)coated silica(PDA@SiO_(2))nanoparticles using a droplet-based microfluidic technique and followed by pyrolysis of PDA@SiO_(2)(C@SiO_(2))*** of the templated carbonization of adhesive PDA,the prepared C@SiO_(2)PC beads were endowed with simultaneous easy-to-identify structural color,high mechanical strength,and ultralow ontology *** demonstrated that the structural colored C@SiO_(2)barcodes not only maintained a high structural stability and good biocompatibility during the coculturing with fibroblasts and tumor cells capture but also achieved an enhanced fluorescentreading signal-to-noise ratio in the fluorescence-reading *** features make the C@SiO_(2)PC barcodes versatile for expansive application in fluorescence-reading-based multibioassays.

关键词： template maintained versatile