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中央民族大学学报（自然科学版） 2024年第1期33卷 68-73页

作者：孙光懿天津音乐学院网络安全和信息化办公室天津300171

作为校园网常见问题,二层环路故障不仅隐蔽性强,而且定位也较为困难。文章分析了二层环路网络故障所带来的危害,给出了具体检测方法和防范措施。研究对于优化校园网运维管理体系,进一步提高校园网的可靠性和稳定性具有一定实践意义。

关键词：校园网二层环路广播风暴

Fabrication and characterization of squama-shape micro/nano multi-scale silicon material

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Science China(Technological Sciences) 2012年第12期55卷 3395-3400页

作者： ZHANG XiaoSheng ZHU FuYun sun guangyi ZHANG HaiXia National Key Lab of Nano/Micro Fabrication Technology Peking UniversityBeijing 100871China Mechanical and Aerospace Engineering Department University of CaliforniaLos AngelesCalifornia 90095USA

This paper presents the fabrication of squama-shape micro/nano multi-scale structures and the analysis of the interaction among different-scale structures during the fabrication processes. Well-designed microstructures made of inverted pyramids and V-shape grooves are fabricated by KOH wet etching. High-dense high-aspect-ratio (HAR) nanostructures are fabricated atop microstructures by an improved maskless deep reactive ion etching (DRIE) process, with an optimized recipe to form micro/nano dual-scale structures (MNDS). Due to the impact of the profile of microstructures on the shape of nanostructures, dissymmetrical (i.e., squama-shape) nanopillars have been formed on the inclined surfaces of microstructures, while the symmetrical nanopillars are formed on the horizontal surfaces with different formation velocities. Furthermore, the optical properties of MNDS are not sensitive to structural parameters of microstructures, making the sample overcome the lithography limitation of conventional processes for photo-devices. Eventually, three-level structures are fabricated by sputtering a gold thin film on the MNDS, and the profile of MNDS is selective in the deposition of gold particles, which is very useful for practical applications.

关键词： deep reactive ion etching (DRIE) multi-scale structures squama-shape hierarchical structure silicon

Origin of C type adakite magmas in the NE Xing＇an block, NE China and tectonic implication

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Acta Geochimica 2018年第2期37卷 281-294页

作者： Changzhou Deng guangyi sun Deyou sun Hu Huang Jianfeng Zhang Jun Gou College of Earth Sciences Jilin University Changchun 130061 China State Key Laboratory of Environmental Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China University of Chinese Academy of Sciences Beijing 100049China Institute of Sedimentary Geology Chengdu University of Technology Chengdu 610059 China Heilongjiang Institute of Geological Survey Harbin 150036China

In this paper, we report new whole-rock geochemical and zircon U-Pb data for monzogranites in the NE Xing＇an block. These data constrained the petrogenesis of C type （high Sr/Y） adakitic rocks and showed the spatial extent of the influence of the Mongol-Okhostsk ocean tectonic regime and the collision between the Jiamusi Massif and Songliao Terrane. New zircon laser-ablation inductivity coupled plasma mass spectrometry （LA-ICP-MS） U-Pb data indicated that the monzogranites in the studied area were emplaced in the Early Jurassic （～ 180 Ma）. These rocks were characterized by unusally high SiO2 （≥67.49）, and Sr （461-759 ppm）, but strikingly low Y （4.63-8.06 ppm） and HREE （∑HREE = 3.83-6.49 ppm, Yb = 0.5-0.77 ppm） contents, with therefore high Sr/Y （67.2-119） and （La/Yb）N （29.7-41.5） ratios, showing the geochemical characteristics of C type adakitic granite. The data displayed negligible Eu anomalies （Eu/Eu^＊ =0.77-1.08）, LREE-enriched and pronounced negative Nb and Ta anomalies. The C-type adakites in the studied area were most likely derived from the partial melting of a thickened lower continental curst. The magma source is most likely dominated by amphibolites and garnet amphibolites. In combination with previously-reported data from igneous rocks from the Mesozoic in NE China, we conclude that the Xing＇ an block was influenced by the Mongol-Okhotsk subduction tectonic system, and experiences compressive settings from the amalgamation of the Jiamusi block in the east of the CAOB.

关键词： C type adakite Geochemistry U-Pb age Thickened LCC NE Xing' an block

Age and geochemistry of Early Ordovician A-type granites in the Northeastern Songnen Block,NE China

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Acta Geochimica 2018年第6期37卷 805-819页

作者： Changzhou Deng Deyou sun guangyi sun Changlu Lv Zhen Qin Xianquan Ping Guanghui Li College of Earth Sciences Jilin UniversityChangchun130061China Heilongjiang Institute of Geological Survey Harbin150036China State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang550081China Faculty of Earth Sciences China University of GeosciencesWuhan430074China

Early Ordovician A-type granites in the northeastern(NE) Songnen Block NE China were studied to better understand the geodynamic settings in this *** research presents new zircon U–Pb ages and wholerock geochemical data for the Early Ordovician granites in the NE Songnen Block. Zircon U–Pb dating indicates that the granite in the Cuibei, Hongxing, and Meixi areas in the NE Songnen Block formed in the Early Ordovician with ages of 471–479 Ma. The granites show geochemical characteristics of high SiO2 and K2 O compositions and low FeOT, MgO, CaO, and P2 O5 compositions. They belong to a high K calc-alkaline series and display a weak peraluminous featurPe with A/CNK values of 0.98–1.14. The rocks have aREE composition of 249.98–423.94 ppm,and are enriched in LREE with(La/Yb)Nvalues of2.87–9.87, and display obvious Eu anomalies(d Eu =0.01–0.29). Trace elements of the studied granites are characterized by enrichment in Rb, Th, U, Pb, Hf, and Sm,and depletion of Ba, Nb, Ta, and Sr. They display geochemical features of high Zr +Y + Nb+Ce values(324–795 ppm) and Ga/Al ratios consistent with A-type granites. Based on particular geochemical features, such as high Rb/Nb(7.98–24.19) and Y/Nb(1.07–3.43), the studied A-type granites can be further classified as an A2-type subgroup. This research indicates that the Early Ordovician A-type granites were formed by the partial melting of ancient crust in an extensional setting. Lower Sr/Y and(Ho/Yb)Nratios indicate that plagioclase and amphibole are residual in the source, and garnet is absent, implying that the magma was generated at low levels of pressure. By contrast, the contemporaneous granites in the SE Xing'an Block suggest a subduction-related tectonic setting, and its adakitic property indicates a thickened continental *** suggest that the Paleo-Asian Ocean plate between the Xing'an and Songnen blocks subducted northward during the Early Ordovician. Meanwhile, the NE Songnen Block was exposed to a passive contin

关键词： Early Ordovician A-type granite Songnen and Xing’an blocks Geodynamic setting

Understanding the excretion rates of methylmercury and inorganic mercury from human body via hair and fingernails

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Journal of Environmental Sciences 2022年第9期34卷 59-67页

作者： Wei Zhang Fen Li Lingjian Gao guangyi sun Zikang Cui Fengfeng Chen Ping Li Xinbin Feng Lihai Shang State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China University of Chinese Academy of Sciences Beijing 100049China College of Tea(Pu’er) West Yunnan University of Applied SciencesDali 665000China School of Public Health Key Laboratory of Environmental Pollution Monitoring and Disease ControlMinistry of EducationGuizhou Medical UniversityGuiyang 550025China

Effective biomarkers are necessary to better understand the human mercury(Hg) exposure levels. However, mismatched biomarker sampling method causes extra uncertainty in assessing the risk of Hg exposure. To compare the differences between hair and fingernail, and further understand the excretion rates of methylmercury(MeHg) and inorganic mercury(IHg) via hair and fingernails, the total mercury(THg), Me Hg, and IHg concentrations in paired hair and fingernail samples were investigated through paired samples collected from two typical mining areas, Wanshan mercury mine area(WMMA) and Hezhang zinc smelting area(HZSA). The positive correlation in THg, MeHg, and IHg concentrations( p < 0.01) between hair and fingernail samples indicated that those two biomarkers can be corrected in application of assessing human Hg exposure. Compared to fingernails, the hair was suggested to be a more sensitive biomarker as the concentration of THg, MeHg and IHg were 2~4 times higher than those in fingernails. Furthermore, the amounts of THg, MeHg, and IHg excreted via hair were 70~226 times higher than that excreted via fingernails, and the hair plays a more important role than fingernails in the excretion of Hg from human bodies. Present study therefore provides some new insights to better understand the fate of human assimilated Hg.

关键词： Mercury Methylmercury Hair Fingernails Biomarker Excretion rate

When smoke meets gut:deciphering the interactions between tobacco smoking and gut microbiota in disease development

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Science China(Life Sciences) 2024年第5期67卷 854-864页

作者： Bo Chen guangyi Zeng Lulu sun Changtao Jiang Center of Basic Medical Research Institute of Medical Innovation and ResearchPeking University Third HospitalBeijing 100191China Department of Physiology and Pathophysiology School of Basic Medical SciencesState Key Laboratory of Vascular Homeostasis and RemodelingPeking UniversityBeijing 100191China Center for Obesity and Metabolic Disease Research School of Basic Medical SciencesPeking UniversityBeijing 100191China State Key Laboratory of Women’s Reproductive Health and Fertility Promotion Peking UniversityBeijing 100191China Department of Endocrinology and Metabolism Peking University Third HospitalBeijing 100191China

Tobacco smoking is a prevalent and detrimental habit practiced worldwide,increasing the risk of various diseases,including chronic obstructive pulmonary disease(COPD),cardiovascular disease,liver disease,and *** previous research has explored the detrimental health effects of tobacco smoking,recent studies suggest that gut microbiota dysbiosis may play a critical role in these *** tobacco smoke components,such as nicotine,are found in the gastrointestinal tract and interact with gut microbiota,leading to lasting impacts on host health and *** review delves into the ways tobacco smoking and its various constituents influence gut microbiota composition and *** also summarize recent advancements in understanding how tobacco smoking-induced gut microbiota dysbiosis affects host ***,this review introduces a novel perspective on how changes in gut microbiota following smoking cessation may contribute to withdrawal syndrome and the degree of health improvements in smokers.

关键词： tobacco smoking gut microbiota dysbiosis nicotine smoking cessation

On Friendly Index Sets of Cyclic Silicates

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Journal of Mathematical Research with Applications 2015年第6期35卷 591-604页

作者： Zhenbin GAO Sinmin LEE guangyi sun Geechoon LAU College of Science Harbin Engineering University Deptartment of Computer Science San Jose State University Faculty of Computer and Mathematical Sciences Universiti Teknologi MARA (Segamat Campus)

Let G be a graph with vertex set V(G) and edge set E(G). A labeling f : V(G) →Z2 induces an edge labeling f*: E(G) → Z2 defined by f*(xy) = f(x) + f(y), for each edge xy ∈ E(G). For i ∈ Z2, let vf(i) = |{v ∈ V(G) : f(v) = i}| and ef(i) = |{e ∈ E(G) : f*(e) =i}|. A labeling f of a graph G is said to be friendly if |vf(0)- vf(1)| ≤ 1. The friendly index set of the graph G, denoted FI(G), is defined as {|ef(0)- ef(1)|: the vertex labeling f is friendly}. This is a generalization of graph cordiality. We investigate the friendly index sets of cyclic silicates CS(n, m).

关键词： vertex labeling friendly labeling cordiality friendly index set cycle CS(n,m) arithmetic progression

考虑隔夹层影响的平行水平井网三维水驱油实验及驱替特征研究

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北京石油化工学院学报 2024年第1期32卷 38-45页

作者：孙广义罗宪波王鹏翟上奇陈科中海石油(中国)有限公司天津分公司天津300459 中海油能源发展工程技术分公司中海油实验中心(渤海) 天津300459

以相似理论为指导,根据渤海BZ油田目的层地质条件设计了具有不同封隔能力的50 cm×50 cm×30 cm(长×宽×高)非均质性三维储层模型,井网选择平行水平井网。在优选的1.0 mL/min的驱替速度条件下,采用平行水平井网进行2组水驱油实验,通过... 详细信息

以相似理论为指导,根据渤海BZ油田目的层地质条件设计了具有不同封隔能力的50 cm×50 cm×30 cm(长×宽×高)非均质性三维储层模型,井网选择平行水平井网。在优选的1.0 mL/min的驱替速度条件下,采用平行水平井网进行2组水驱油实验,通过测量驱油过程中储层的电性特征、注入水、采油量和产水量等参数,将储层的电性特征换算成含油性,分析在具不同特征的储层中水驱特征。结果表明:平行水平井网在具不同夹层类型模型水驱油过程中,注入水在重力和不渗透夹层的遮挡作用下使得注入水在储层下部注采跟部区域突进更快、见水更早、波及范围小、总体采出程度低,在模型上部夹层之上区域剩余油饱和度高。对于具不渗透夹层的储层类型可以通过在夹层上方加密井网来提高采收率。对于具半渗透夹层的储层类型的储层剩余油的挖潜重点在夹层下部未受注采井控制的区域。

关键词：隔夹层水平井网驱油实验水驱特征剩余油

Structure,bioavailability and physicochemical properties of icariin-soymilk nanoparticle

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Food Science and Human Wellness 2024年第2期13卷 972-981页

作者： Jinping Wang Lingrong Wen Yueming Jiang Hong Zhu Weizheng sun guangyi Dai Bao Yang Guangdong Provincial Key Laboratory of Applied Botany Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic ImprovementSouth China Botanical GardenChinese Academy of SciencesGuangzhou 510650China South China National Botanical Garden Guangzhou 510650China College of Food Science and Engineering Jilin Agricultural UniversityChangchun 130118China University of Chinese Academy of Sciences Beijing 100049China School of Food Sciences and Engineering South China University of TechnologyGuangzhou 510640China

Soymilk is a natural ***,the performance of flavonoid-soymilk nano-complex remains *** this work,icariin-soymilk nano-complexes(ISNCs)were successfully fabricated and *** effects of high-pressure homogenization(HPH)treatment on structure and physicochemical properties of soymilk and nano-complexes were *** treatment could significantly improve the surface hydrophobicity and interfacial activity of *** soymilk with HPH treatment could significantly improve the water solubility(20 folds),thermal stability and bioavailability of *** highest encapsulation efficiency(93.28%),loading capacity(39.09μg/mg),ζ-potentia(absolute value,31.20 mV)and bioavailability(72.14%)were observed in HSI-200(200 bar of homogenization pressure).While HSI-500(500 bar of homogenization pressure)showed the smallest particle size(183.73 nm).ISNCs showed a rougher surface and an irregular lamellar structure with large amount of fine particles by using Cryo-SEM,suggesting that icariin was encapsulated in *** data supplied a novel strategy to improve the performance of icariin in functional foods.

关键词： Encapsulation efficiency Flavonoid High pressure homogenization Loading capacity Nano-complex

Laser-assisted grinding of RB-SiC composites:Laser ablation behavior and mechanism

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Chinese Journal of Aeronautics 2024年第1期37卷 362-376页

作者： Zhigang DONG Wenchao sun Xintong CAI Feng YANG Yan BAO Renke KANG Dongjiang WU guangyi MA Fangyong NIU Key Laboratory for Precision and Non-traditional Machining Technology of the Ministry of Education School of Mechanical EngineeringDalian University of TechnologyDalian 116024China

Laser ablation is an important process during Laser-Assisted Grinding(LAG)of hard and brittle *** realize controllable material removal during laser ablation of RB-SiC composites,ablation experiments under different Laser Energy Density(LAED)and LAG experiments are *** rules and mechanism of physical phase,ablation morphology and crack characteristics caused by laser irradiation are *** forces of LAG and Conventional Grinding(CG)are *** results show that ablation surface changes from slight oxidation to obvious material removal with LAED increasing,and ablation depth increases *** ablation products change from submicron SiO_(2)particles to nanoscale particles and *** LAED promotes SiC decomposition and sublimation,which leads to the increase of C *** SiC phase forms corrugated shape in recast layer and columnar shape in Heat Affected Zone(HAZ)at 56 J/mm^(2).The cold and heat cycle leads to formation of fishbone *** ablation specimen under 30 J/mm^(2),the grinding force can be reduced by a maximum of 39%and brittle damage region is *** material removal and microcrack generated will significantly reduce the hardness and improve machinability,which can promote grinding efficiency.

关键词： RB-SiC Laser Ceramic Composites Grinding