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A review on surface coating strategies for anti-hygroscopic of high energy oxidizer ammonium dinitramide

Defence Technology（防务技术） 2024年第3期33卷 237-269页

作者： Hongyu Yang Fuyao Chen Yiwen Hu qiangqiang lu Lei Xiao Yinglei Wang Fengqi Zhao Wei Jiang Gazi Hao National Special Superfine Powder Engineering Research Center of China School of Chemistry and Chemical EngineeringNanjing University of Science and TechnologyNanjing 210094China Xi’an Modern Chemistry Research Institute Xi’an 710065China

Ammonium dinitramide(ADN),which has the advantages of high energy density,no halogen and low characteristic signal,is not only considered as a new high-energy oxidizer that is expected to replace the traditional oxidizer ammonium perchlorate(AP)in solid propellants,but also a good performance explosive in ***,due to the strong hygroscopicity of ADN,its application in solid propellants and explosives is greatly *** the hygroscopicity of ADN is the key to realize the wide application of *** this paper,we systematically review the research progress of anti-hygroscopic strategies of ADN *** surface coating methods are focusing on solvent volatilization,solvent-non-solvent,melt crystallization and atomic layer deposition *** characteristics of the different methods are compared and analyzed,and the basis for the classification and selection of the coating materials are introduced in *** addition,the feasibility of material for surface coating of ADN is evaluated by several compatibility analysis *** is highly expected that the liquid phase method(solvent volatilization method,solvent-non-solvent method)would be the promising method for future ADN coating because of its effective,safety and facile ***,polymer materials,are the preferred coating materials due to their high viscosity,easy adhesion,good anti-hygroscopic effect,and heat resistance,which make ADN weak hygroscopicity,less sensitive,easier to preserve and good compatibility.

关键词： Ammonium dinitramide(ADN) Energetic materials Anti-hygroscopic Surface coating Compatibility analysis

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Exploring the hygroscopic behavior of highly energetic oxidizer ammonium dinitramide(ADN)at different temperatures and humidities using an innovative hygroscopic modeling

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Defence Technology（防务技术） 2024年第10期40卷 25-34页

作者： qiangqiang lu Ben Liu Zhifang Xie Yiwen Hu Hongyu Yang Junqing Yang Lei Xiao Fengqi Zhao Hongxu Gao Wei Jiang Gazi Hao National Special Superfine Powder Engineering Research Center of China School of Chemistry and Chemical EngineeringNanjing University of Science and TechnologyNanjing 210094China Xi'an Modern Chemistry Research Institute Xi'an 710065China Shanxi Northern Xingan Chemical Industrial Co. Ltd.Taiyuan 030008China

Ammonium dinitramide(ADN)is a new type of green energetic oxidizer with excellent energy density and low pollution combustion ***,the strong hygroscopicity has a significant impact on its practical *** assist in the research on moisture-proof modification of ADN materials,an innovative hygroscopic modeling approach was proposed to evaluate the hygroscopicity of ADN at various temperatures and *** investigating the diffusion coefficient of water molecules in molecular dynamics processes,a visual insight into the hygroscopic process of ADN was ***,analyzing the non-covalent interactions between ADN and water molecules,the hygroscopicity of ADN could be evaluated qualitatively and *** energy analysis revealed that electrostatic forces play a dominant role in the process of water adsorption by ADN,whereas van der Waals forces impede *** a whole,the simulation results show that ADN presents the following hygroscopic law:At temperatures ranging from 273 K to 373 K and relative humidity(RH)from 10%to 100%,the hygroscopicity of ADN generally shows an increasing trend with the rise in temperature and humidity based on the results of three *** to the non-hygroscopic point(298 K,52%RH)of ADN obtained by experiment in the literature,a non-hygroscopic range of temperature and humidity for ADN can be depicted when the simulation results in relative hygroscopicity is less than or equal to 17%.This study can provide effective strategies for screening anti-hygroscopic modified materials of ADN.

关键词： Ammonium dinitramide Molecular dynamics Hygroscopicity Diffusion coefficient Noncovalent interactions

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Tree-ring δ^(15)N of Qinghai spruce in the central Qilian Mountains of China:Is pre-treatment of wood samples necessary?

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Journal of Arid Land 2022年第6期14卷 673-690页

作者： WANG Ziyi LIU Xiaohong WANG Keyi ZENG Xiaomin ZHANG Yu GE Wensen KANG Huhu lu qiangqiang School of Geography and Tourism Shaanxi Normal UniversityXi'an 710119China State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China Qilian Mountain National Park Research Center(Qinghai) Xining 810008China School of Earth System Science Tianjin UniversityTianjin 300072China

A knowledge of the tree-ring stable nitrogen isotope ratio(δ^(15)N)can deepen our understanding of forest ecosystem dynamics by indicating the long-term availability,cycling and sources of nitrogen(N).However,the radial mobility of N blurs the interannual variations in the long-term N *** studies of the chemical extraction of tree rings before analysis had produced inconsistent results and it is still unclear whether it is necessary to pre-treat wood samples from specific tree species to remove soluble N compounds before determining theδ^(15)N *** compared the effects of pre-treatment with organic solvents and hot ultrapure water on the N concentration andδ^(15)N of tree rings from endemic Qinghai spruce(Picea crassifolia)growing in the interior of the central Qilian Mountains,China,during the last 60 *** assessed the effects of different preparation protocols on the removal of the labile N compounds and investigated the need to pre-treat wood samples before determining theδ^(15)N values of tree *** trends of the tree-ring N concentration were consistently observed in both the extracted and unextracted wood *** total N removed by extraction with organic solvents was about 17.60%,with a significantly higher amount in the sapwood section(Plues of tree rings decreased consistently from 1960 to 2019 in both the extracted and unextracted wood *** with organic solvents increased theδ^(15)N values markedly by about 5.2‰and reduced the variations in theδ^(15)N ***,extraction with hot ultrapure water had little effect,with only a slight decrease in theδ^(15)N values of about 0.5‰.Our results showed that the radial pattern in the inter-ring movement of N in Qinghai spruce was not minimized by extraction with either organic solvents or hot ultrapure *** is unnecessary to conduct hot ultrapure water extraction for the wood samples from Qinghai spruce because of its negligible effect on t

关键词： tree rings stable nitrogen isotope ratio(δ^(15)N) nitrogen concentration solvent-extracted wood water-extracted wood wood pre-treatment Qinghai spruce Qilian Mountains

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二氧化碳浓度增加和气候变暖导致太白山林线树木生长与氮有效性关系减弱

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Journal of Plant Ecology 2024年第1期17卷 148-164页

作者： Lelong Yin Xiaohong Liu Xiaomin Zeng Ziyi Wang Guobao Xu Liangju Zhao qiangqiang lu Lingnan Zhang Xiaoyu Xing School of Geography and Tourism Shaanxi Normal UniversityXi'an 710119China State Key Laboratory of Cryospheric Sciences Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity College of Urban and Environmental SciencesNorthwest UniversityXi'an 710069China Key Laboratory of Soil Resource&Biotech Applications Shaanxi Academy of SciencesXi'an Botanical Garden of Shaanxi Province(Institute of Botany of Shaanxi Province)Xi'an 710061China Qinling National Botanical Garden Xi'an 710061China

全球气候变暖、大气二氧化碳浓度(C_(a))升高和氮有效性正对全球森林生态系统产生深远影响,尤其是在高海拔林线地区。本研究结合树木生长指标和树轮稳定同位素指标,探讨了太白山林线树种太白红杉(Larix chinensis)对环境胁迫的生理生态... 详细信息

全球气候变暖、大气二氧化碳浓度(C_(a))升高和氮有效性正对全球森林生态系统产生深远影响,尤其是在高海拔林线地区。本研究结合树木生长指标和树轮稳定同位素指标,探讨了太白山林线树种太白红杉(Larix chinensis)对环境胁迫的生理生态响应。研究结果表明,近60年来太白红杉的生长速度显著增加,且该林线树木生长对春季温度特别敏感。太白红杉的潜在水分利用效率(iWUE)的持续上升与大气二氧化碳浓度升高和气候变暖紧密相关,共同促进了树木的生长。1851-1964年,树轮δ^(15)N随树木生长速度的加快逐渐增大;1964年之后转变为不显著的下降,打破了原有的碳-氮平衡。分析结果表明,自20世纪60年代以来气候变暖和iWUE的迅速增加已经取代氮有效性成为树木生长的主要驱动因子。随着树木持续加速生长,氮有效性在未来可能会显著下降甚至供不应求。本研究深入揭示了植物对生长环境变化响应的生理生态机制,这将提高我们预测未来高海拔地区森林生态系统演变的能力。

关键词：树轮稳定同位素高山林线植被气候变暖 CO_(2)肥化效应太白山

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Variations in lignin monomer contents and stable hydrogen isotope ratios in methoxy groups during the biodegradation of garden biomass

Variations in lignin monomer contents and stable hydrogen is...

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2022年全国有机固废处理与资源化利用大会

作者： qiangqiang lu Lili Jia Mukesh Kumar Awasthi Guanghua Jing Zhikun Chen Xinwei Shi Key Laboratory of Soil Resource & Biotech Applications Shaanxi Academy of Sciences Shaanxi Engineering Research Centre for Conservation and Utilization of Botanical Resources Xi'an Botanical Garden of Shaanxi Province (Institute of Botany of Shaanxi Province) School of Geography and Tourism Shaanxi Normal University College of Forestry Northwest A&F University College of Natural Resources and Environment Northwest A&F University

Lignin, a highly polymerized organic component of plant cells, is one of the most difficult aromatic substances to degrade. Selective biodegradation under mild conditions is a promising method, but the dynamic variations in lignin monomers during the biodegradation of lignocellulose are not fully understood. In this study, we evaluated the differences in lignin degradation under different microbial inoculation based on the lignin monomer content, monomer ratio, and stable hydrogen isotope ratio of lignin methoxy groups(δ2HLM). The weight loss during degradation and the net loss of lignocellulosic components improved dramatically with fungal inoculation. Syringyl monolignol(S-lignin), which contains two methoxy groups, was more difficult to degrade than guaiacyl(G-lignin), which contains only one methoxy group. The co-culture of Pseudomonas mandelii and Aspergillus fumigatus produced the greatest decrease in the G/S ratio, but δ2HLM values did not differ significantly among the three biodegradation experiments, although the enrichment was done within the fungal inoculation. The fluctuation of δ2HLM values during the initial phase of biodegradation may be related to the loss of pectic polysaccharides(another methoxy donor), which mainly originate from fallen leaves. Overall, the relative δ2HLM signals were preserved despite decreasing G/S ratios in the three degradation systems. Nevertheless, some details of lignin δ2HLM as a biomarker for biogeochemical cycles need to be explored further.

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运用C#语言对损坏文件拼接复原系统的设计

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洛阳理工学院学报（自然科学版） 2019年第2期29卷 84-86页

作者：录强强中国刑事警察学院文件检验系

针对损坏文件的复原工序,多利用人工进行拼接复原,尽管人工复原能够较好的满足要求,但是其耗时较大,无法满足大量复原的现实要求,计算机拼接复原系统能够较好地解决该问题。利用C#语言编写的自动复原拼接程序,人工干预点少,保证结果的... 详细信息

针对损坏文件的复原工序,多利用人工进行拼接复原,尽管人工复原能够较好的满足要求,但是其耗时较大,无法满足大量复原的现实要求,计算机拼接复原系统能够较好地解决该问题。利用C#语言编写的自动复原拼接程序,人工干预点少,保证结果的有效性及正确率。该算法具有较高的准确性、有效性、快捷性、稳定性,可以应用于司法证据复原以及考古碎裂文物的拼接复原等诸多领域。

关键词：损坏文件 C#语言算法司法证据复原

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煤矿主通风机切换系统的不停机控制研究

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机械管理开发 2024年第1期39卷 26-27,31页

作者：逯强强山西宁武榆树坡煤业有限公司山西宁武036700

为解决传统通风机切换过程中工作面风速波动明显、瓦斯积聚或超限频发等问题,在对主通风机切换方案分析的基础上,对通风机的工况点和性能曲线进行研究,提出了通风机不停机切换方案及相应控制流程,并将其与工作面风速及瓦斯浓度改善情况... 详细信息

为解决传统通风机切换过程中工作面风速波动明显、瓦斯积聚或超限频发等问题,在对主通风机切换方案分析的基础上,对通风机的工况点和性能曲线进行研究,提出了通风机不停机切换方案及相应控制流程,并将其与工作面风速及瓦斯浓度改善情况进行对比,取得了理想的效果。

关键词：通风机不停机切换风速波动瓦斯浓度安全生产

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出口弯管对通风机性能的影响

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机械管理开发 2024年第2期39卷 28-30页

作者：逯强强山西宁武榆树坡煤业有限公司山西忻州036700

为解决煤矿生产工作面由于现场条件的局限性导致通风机性能无法充分发挥的问题,重点对通风机连接直管段长度和正反接弯头下对应的性能进行对比。根据试验需求制定了试验方案,并提出两种试验方案;具体对直管段长度与弯头连接方式对通风... 详细信息

为解决煤矿生产工作面由于现场条件的局限性导致通风机性能无法充分发挥的问题,重点对通风机连接直管段长度和正反接弯头下对应的性能进行对比。根据试验需求制定了试验方案,并提出两种试验方案;具体对直管段长度与弯头连接方式对通风机全压的影响进行对比,所得的试验结论可指导实践生产中通风机的安装。

关键词：出口弯管通风机全压效率体积流量直管段

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采掘交替工作面风阻测定及通风系统优化

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能源与节能 2024年第8期 272-275页

作者：逯强强山西宁武榆树坡煤业有限公司山西忻州036700

通风系统是矿井生产的重要保障。为了保证矿井的生产能力与安全性,介绍了矿井的主要概况,并对通风系统进行了分析;对采掘交替工作面的风阻进行测定,并提出了4点问题和3种方法;建立通风系统优化仿真模型,通过分析得到3点优化结论;研究了... 详细信息

通风系统是矿井生产的重要保障。为了保证矿井的生产能力与安全性,介绍了矿井的主要概况,并对通风系统进行了分析;对采掘交替工作面的风阻进行测定,并提出了4点问题和3种方法;建立通风系统优化仿真模型,通过分析得到3点优化结论;研究了自然风对通风系统的影响,确定两台通风机之间相互作用较小,不影响系统优化后运行的稳定性。

关键词：通风系统采掘交替风阻仿真系统优化

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长庆油田精细分层注水及配套测试技术新进展

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油气井测试 2024年第4期33卷 49-55页

作者：何秀玲卓红周运波卢强强中国石油集团测井有限公司长庆分公司陕西西安710201

长庆油田是典型的低渗、低压、低丰度的“三低”油田,采用丛式井组开发模式,对精细分层注水工艺提出了更高的要求。桥式同心分层注水技术结合机电一体化和电缆传感接收技术,利用封隔器和桥式同心配水器实现精细分层注水,在注水过程中,... 详细信息

长庆油田是典型的低渗、低压、低丰度的“三低”油田,采用丛式井组开发模式,对精细分层注水工艺提出了更高的要求。桥式同心分层注水技术结合机电一体化和电缆传感接收技术,利用封隔器和桥式同心配水器实现精细分层注水,在注水过程中,实时监测流量、温度、压力等参数,并通过连接电缆将参数传送至地面,实时对注水流量进行测试与调配,确保注水作业的准确性和高效性。该技术提高了调配测试的成功率,提升了调配测试精度和分注合格率。累计推广应用1850井次,均取得显著进展,并实现了分层注水工艺技术的升级换代,为油气勘探行业在精细化挖潜方面带来有效而可靠的技术方案。

关键词：精细分层注水桥式同心分注电缆测调桥式偏心分注电缆直读验封调配验封成功率实时监测

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