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大学图书情报学刊 2024年第1期42卷 22-26页

作者：黄兴燕阳国华淮南师范学院图书馆 232038

文章通过梳理国内外高校图书馆学习支持服务现状,总结其服务特点,结合当今AI科技发展的新趋势,探讨智慧图书馆背景下的学习支持服务发展新模式。

关键词：智慧图书馆用户需求学习支持服务高校图书馆

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Experimental Study on a New Dual-Layer Granular Bed Filter for Removing Particulates

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Journal of China University of Mining and Technology 2007年第2期17卷 201-204页

作者： yang guo-hua ZHOU Jiang-hua Maritime College Ningbo University Ningbo Zhejiang 315211 China

A new dual-layer granular bed filter for hot gas cleanup was invented and studied experimentally. Fine sand,0.5-1 mm grain size and about 1350 kg/m3 bulk density,was used as the lower layer of the filter. Expanded perlite par-ticles,2-5 mm grain size and about 70 kg/m3 bulk density,was used for the upper layer of the filter in this study. It was confirmed that the sizes and densities of these two media matched well; the binary media remained in complete segre-gation during regeneration by fluidization. Test results show that the filtration of the expanded perlite particle layer was characterized as "deep bed filtration." Filtration of the fine sand layer was "surface cake filtration." The expanded per-lite particle layer contributed about 90% to the bed dust capacity,but only about 20% to the total bed pressure drop,which increased the bed dust capacity ten fold compared to a single-layer bed of the same sand and the same total bed pressure drop. The dust cake on the surface of the fine sand layer raised the collection efficiencies to over 99.99%.

关键词： filtration granular bed filter particulate

ICP-MS法结合化学计量学分析不同菲牛蛭元素差异

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化学研究与应用 2024年第7期36卷 1625-1631页

作者：王嘉慧柳志诚杨国华杨玉升陶欧马涛刘永刚北京中医药大学中药学院北京102401 云南世纪华宝医药产业开发有限公司云南楚雄675000

采用ICP-MS法结合指纹图谱、相关性分析和主成分分析研究不同批次、不同生长发育时期的菲牛蛭中无机元素的含量特征。26种无机元素在0~1000μg·L^(-1)线性关系良好,R^(2)≥0.9998,检出限0.0009~0.5094μg·L^(-1),精密度RSD≤1.80%、... 详细信息

采用ICP-MS法结合指纹图谱、相关性分析和主成分分析研究不同批次、不同生长发育时期的菲牛蛭中无机元素的含量特征。26种无机元素在0~1000μg·L^(-1)线性关系良好,R^(2)≥0.9998,检出限0.0009~0.5094μg·L^(-1),精密度RSD≤1.80%、重复性RSD≤2.94%;平均加样回收率85.79%(120.27%,RSD≤3.16%。结果显示Zr、Sc、Te、Bi、Mo、In在菲牛蛭中只能微量检出或未检出。Na、Mg、Al、K、Fe、Ga、Ba在不同批次间差异较大;K、Ca、Fe、Al、Mn等元素含量具有较强的特征性,可作为鉴定不同月龄菲牛蛭的参考依据。ICP-MS法可用于菲牛蛭中26种无机元素的含量测定,菲牛蛭中的无机元素含量差异可作为其不同生长发育时期的分析依据。

关键词：菲牛蛭无机元素电感耦合等离子体质谱统计分析

Combined Removal of Surface Moisture and Dust from Feed Coal for Coal Dry Cleaning with an Air-solid Fluidized Bed

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Journal of China University of Mining and Technology 2005年第4期15卷 283-287页

作者： yang guo-hua ZHAO Yue-min CHEN Qing-ru Ningbo University Ningbo Zhejiang 315211 China School of Chemical Engineering and Technology China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

A demonstration plant and a commercial plant employing coal dry cleaning technology with an air-solid fluidized bed were built in China. The operation practice of these two plants shows that the surface moisture and the fines or dust of feed coal must be well controlled as low as possible. For this purpose, a new process of combined removal of surface moisture and dust from feed coal using a vibrated fluidized bed dryer was investigated in a batch test apparatus and a pilot test system. A mathematical model on drying kinetics of coal surface moisture was developed and three empirical formulas of the model coefficient involving the main operating variables were determined based on the test results from the batch test apparatus. The mathematical model shows that the surface moisture retained in coal during drying decreases exponentially with drying time. According to this model, a new divisional heat supply mode, in which the inlet gas of higher temperature was introduced into the fore part of the dryer and the inlet gas of lower temperature into the rear part of the dryer, was employed in the pilot test system. The pilot tests show that 1） the new divisional heat supply mode is effective for lowering down the average temperature and reducing the total heat loss of the outlet gas off the dryer, 2） the moist coal of about 60 g/kg surface moisture contentcan be dried to about 10 g/kg, and simultaneously the fines （〈1mm in diameter） adhering to the surface of coarse coal particles are completely washed off by the gas flow.

关键词： coal dry cleaning drying dust vibrated fluidized bed

Solubility of wood-cellulose in LiCl/DMAC solvent system

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Forestry Studies in China 2007年第3期9卷 217-220页

作者： He Jing Liu Zhu Li hua-yang Wang guo-hua Pu Jun-wen College of Materials Science and Technology Beijing Forestry University Beijing 100083 P. R. China

A LiC1/DMAC solvent system was used to dissolve wood-cellulose with aims to broaden its application in preparing functional materials of modified wood-cellulose. We studied the dissolubility complexion of wood-cellulose in a LiC1/DMAC solvent system, made sure of the important function of LiC1 in a cellulose solvent, and further confirmed its dissolution mechanism via the measurement of infrared spectra of soluble products. The study results are as follows： first, LiC1 salts, which can form intermediate complexes with cellulose, have played an important role in the LiC1/DMAC solvent system, and their solubility performance is en- hanced by reducing the hydrogen bond effect between cellulose molecules; second, the non-aqueous solvent system is a better method for dissolving wood-cellulose in homogenous phase. As found in infrared spectra, the absorption intensity of hydroxyl groups （broad peaks： 3,400 cm^-1） decreased greatly in cellulose macromolecules. This is because the degree of association between the hydroxyl groups of cellulose macromolecules is reduced, due to the destruction of the hydrogen bonds. Lastly, wood-cellulose can be dissolved in a LiC1/DMAC solvent thoroughly and efficiently, and can provide a better solvent system for homogeneous synthesis in the preparation of new functional materials via modified wood-cellulose.

关键词： wood-cellulose LiC1/DMAC homogeneous solution solubility

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船舶尾气脱硝方案的技术经济分析

武汉船舶职业技术学院学报 2024年第4期23卷 79-82,92页

作者：向轶吴迪杨国华李瑞华苟远波陈艳艳中煤能源研究院有限责任公司陕西西安710054 西安航天源动力工程有限公司陕西西安710100

为给船舶尾气氮氧化物的减排提供最优方案,介绍了三种可用于尾气处理的脱硝技术,并基于方案比选和效益测算的方式对可行性较高的船用SCR脱硝和臭氧氧化脱硝进行了技术经济分析。结果显示:SCR脱硝的运行成本体现在尿素消耗、电耗、淡水... 详细信息

为给船舶尾气氮氧化物的减排提供最优方案,介绍了三种可用于尾气处理的脱硝技术,并基于方案比选和效益测算的方式对可行性较高的船用SCR脱硝和臭氧氧化脱硝进行了技术经济分析。结果显示:SCR脱硝的运行成本体现在尿素消耗、电耗、淡水消耗、压缩空气消耗和催化剂更换上,总运行费用为107.3元/h;臭氧氧化脱硝的运行成本体现在电耗上,总运行费用为875.3元/h;SCR脱硝和臭氧氧化脱硝系统的电耗分别占柴油机总功率的0.46%和12.78%,即SCR对船舶供电系统的负担更小,且无废水产生。因此认为SCR脱硝用于船舶尾气治理时技术可行性高,经济性好。

关键词：船舶尾气 NOx 脱硝 SCR 臭氧氧化

Cr-assisted low-temperature densification of(Ti,Zr,Nb,Ta,Mo)C high-entropy carbides with ultrafine grain and enhanced hardness

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Journal of Advanced Ceramics 2024年第6期13卷 780-788页

作者： yang Liu Jiaji Liang Weiming guo Shikuan Sun Yu Tian hua-Tay Lin School of Electromechanical Engineering Guangdong University of TechnologyGuangzhou 510006China State Key Laboratory of High Performance Tools Guangdong University of TechnologyGuangzhou 510006China School of Material Science and Energy Engineering Foshan UniversityFoshan 528000China

While the use of low-melting-point metals as sintering aids for high-entropy carbide(HEC)ceramics has been well established,their existence can compromise hardness due to residual metallic *** study demonstrates an innovative strategy to meet this challenge,where(Ti,Zr,Nb,Ta,Mo)C high-entropy carbide ceramics with ultrafine grains and enhanced hardness are obtained through chromium(Cr)-metal-assisted spark plasma sintering(SPS)at a temperature as low as 1600℃.The results show that the addition of 5 vol%Cr promotes the formation of highly densified single HEC phase ceramics with a high relative density(98.4%)and an ultrafine-grained microstructure(0.17μm).This low-temperature densification mechanism can be attributed to Cr’s solid-solution effect within the matrix and the increased carbon vacancies generated during *** grain size of the(Ti,Zr,Nb,Ta,Mo)C ceramics with 5 vol%Cr metal addition is significantly smaller than that of Cr-free(Ti,Zr,Nb,Ta,Mo)C ceramics sintered at 2000℃(3.03μm)or via traditional low-temperature liquid-phase sintering(1.3–1.5μm).Importantly,the addition of 5 vol%Cr substantially increased the hardness of the ceramics,with a remarkable increase from 23.57 to 28.16 GPa compared to that of the pure(Ti,Zr,Nb,Ta,Mo)C ceramics,owing to the fine-grain strengthening and solid-solution strengthening *** work highlights the uniqueness of Cr metal as a sintering aid in achieving densification and hardness improvements in(Ti,Zr,Nb,Ta,Mo)C ceramics,offering a promising strategy for improving the properties of HEC materials for further development in the near future.

关键词： solid solution sinterability hardness enhancement (Ti,Zr,Nb,Ta,Mo)C high-entropy carbide(HEC)ceramics

Activity of T Cells Stimulated by Hemagglutinin-neuraminidase of Newcastle Disease Virus in vivo

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Chemical Research in Chinese Universities 2011年第3期27卷 455-460页

作者： PIAO Bing-guo LI Xiao SUN Li-li KAN Shi-fu LIU Lei huaNG Hai-yan yang guo-hua WANG Yu-hang WANG Zhuo-yue SUN Jiu-hua PIAO Yun-feng JIN Ning-yi The First Hospital of Jilin University Changehun 130021 P. R. ChinA Genetic Engineering Laboratory of PLA 3. Key Laboratory of Jilin Province for Zoonosis Prevention and Control Military Veterinary Institute Academy of Military Medical Sciences of PLA Changehun 130062 P. R. China Key Laboratory of Jilin Province for Zoonosis Prevention and Control Military Veterinary Institute Academy of Military Medical Sciences of PLA Changchun 130062 P. R. China Department of Gastroenterology 209 Hospital of PLA Mudanjiang 157000 P. R. China Head and Neck Surgery Tumor Hospital of Jilin Province Changchun 130001 P R. China

To investigate the stimulated activity of T cells and the anti-tumor properties of hemagglutinin-neuraminidase（HN） of Newcastle disease virus（NDV） strain Changchun（NDVcc）, the expression of HN gene in hepatoma cells（human HepG-2 and mouse H22 cells） infected with the recombinant adenovirus（Ad-HN） was identified by Western blot analysis and flow cytometry. Sialidase activity of NDVcc HN expressed by Ad-HN was assayed by the periodate-resorcinol method. The in vivo anti-tumor effects of NDVcc HN were evaluated in the H22 solid tumor model. Regional lymph nodes of the mouse model treated with Ad-HN were removed to harvest T lymphocytes and evaluating the specific cytotoxicity of cytotoxic T lymphocyte（CTL） and natural killer（NK） cells by an L-lactate dehydrogenase（LDH） assay, in the mean time, the secretion of cytokines was analyzed by enzyme linked immunosorbent assays（ELISA）. The results show that NDVcc HN was effectively expressed by Ad-HN in HepG-2 and H22 cells. The sialidase activity assay showed that Ad-HN significantly reduced sialic acid level of the hepatoma cells compared with the cells infected the empty adenovirus vector（Ad-mock）. When treated with Ad-HN, the growth of subcutaneous H22 primary tumors in C57BL/6 mice was suppressed, and the mean mice survival increased. In addition, the treatment of Ad-HN elicited strong NK and CTL responses, and high levels of Th1 cytokines, such as IL-2 and IFN-γ. In conclusion, NDVcc HN effectively elicits T cell-mediate anti-tumor cytotoxicity via sialidase activity and may be a novel strategy for cancer immunotherapy.

关键词： Newcastle disease virus Hemagglutinin-neuraminidase Hepatoma T Cell Anti-tumor immunity

Vortex identification based on the Liutex method and its effect on fish passage upstream

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Journal of Hydrodynamics 2024年第1期36卷 130-141页

作者： Chun-ying Shen Rui-guo yang Xiao-tao Shi Ming-ming Wang Shi-hua He Faculty of Electrical Power Engineering Kunming University of Science and TechnologyKunming650500China Hubei International Science and Technology Cooperation Base of Fish Passage China Three Gorges UniversityYichang443002China Shanghai Investigation Design and Research Institute Co.LtShanghai200434China

Fishway research is important for mitigating the fragmentation of river habitats caused by hydraulic *** vertical slit fishway is a broadly used fishway type because of its high efficiency and adaptability to water ***,the resulting vortex current disrupts the fish passage hence directly affecting fish *** study aims to accurately capture the vortex structure in the fishway and analyze the effect of vortex elements(vortex structure,vortex intensity,etc.)on *** conducted an analysis of the 3-D current flow field in the fishway through the utilization of an experimental model and the large eddy simulation(LES)***,we captured the vortex information in the fishway at different flow rates using the Liutex vortex identification method and investigated the effect of the vortex on fish *** results revealed that the structures inside the fishway pool occupy most of the room,however,the areas with higher vortex strength were primarily located in the vortex near the vertical seam and the mainstream,the vortex strength inside the fishway gradually increases with increasing flow,suppressing fish *** experienced significantly increased resistance when encountering strong *** suggests that the vortex may act as a physical barrier to fish *** findings highlight the potential negative effects of vortex on fish movement and reiterate the importance of understanding vortex dynamics for aquatic environmental *** an effective tool for identifying vortices in fluid flow,the Liutex method demonstrates features of vortex within the fishway,thereby providing important insights into the interaction between fluid dynamics and aquatic organisms.

关键词： Vertical slit fishway vortex identification method Liutex large eddy simulation(LES) fish experiment computational fluid dynamics

A synergetic strategy of NIR-Ⅱ squaraine dyes with ultrahigh photothermal conversion efficiency for photothermal therapy

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Science China Chemistry 2024年第2期67卷 612-621页

作者： Yigang Wang guomin Xia Junhui Wang Mingda Wang Weihan guo Manman Tan Leilei Si yang yang hua Wang Hongming Wang Institute for Advanced Study and School of Chemistry and Chemical Engineering Nanchang UniversityNanchang330031China State Key Laboratory of Molecular Reaction Dynamics and Dynamics Research Center for Energy and Environmental Materials Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China The Second Affiliated Hospital of Nanchang University Nanchang330031China

Recent research on photothermal therapy(PTT) has sparked significant interest in the development of new organic photothermal agents(PTAs),ranging from single-molecule to aggregated ***,controlling aggregation pathways for PTAs with ultrahigh photothermal conversion efficiency(PCE) remains a major ***,a two-pronged approach utilizing “Haggregation” and “intramolecular motion” was employed to enhance the PCE of an acceptor-substituted squaraine dye(NSQs).The C2vmolecular symmetry of the NSQs,which possess a ground state dipole moment(μg),promotes H-dimeric aggregates through dipole-dipole *** triphenylethylene or diphenylamine groups were added to this H-dimeric *** was done to enhance intramolecular motions for heat generation and also to extend conjugation,which redshifted the optical absorption and balanced the blue-shift induced by *** this technique,an organic PTA with NIR-II absorption was developed,and its nanoparticle achieved a remarkable PCE of 86.3% under 1,064 nm laser *** transient absorption spectroscopy and quantum mechanical calculations demonstrated the accelerated internal conversion process in NIR-II PTAs for rapid heat *** NSQs nanoparticles exhibit superior photothermal therapeutic properties for in vivo photoacoustic imaging-guided PTT,demonstrating the potential of bottom-up design to enable synergistic engineering strategies towards efficient phototheranostic agents.

关键词： squaraine dyes second near-infrared window H-aggregation intramolecular motion photothermal therapy