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Element analysis method of concealed explosive based on TNA 预览
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作者 Meng Huang Jian-Yu Zhu +1 位作者 Jun Wu Rui Li 《核技术:英文版》 SCIE CAS CSCD 2019年第1期19-25,共7页
The detection technology of concealed bulk explosives is related to social security and national defense construction and has important research significance. In this paper, an element analysis method of concealed exp... The detection technology of concealed bulk explosives is related to social security and national defense construction and has important research significance. In this paper, an element analysis method of concealed explosives based on thermal neutron analysis is proposed.This method could provide better reconstruction precision for hydrogen, carbon, and nitrogen ratios, making it possible to discriminate explosives from other compounds with the same elements but different proportions, as well as to identify the types of concealed bulk explosives. In this paper, the basic principles and mathematical model of this method are first introduced, and the calculation formula of the element number ratio(the ratio between the nucleus numbers of two different elements) of the concealed explosive is deduced. Second, a numerical simulation platform of this method was established based on the Monte Carlo JMCT code. By calibrating the absorption efficiencies of the explosive device to c rays, the element number ratios of a concealed explosive model under the irradiation of thermal neutrons were reconstructed from the neutron capture prompt c-ray spectrum. The reconstruction values were in good agreement with the actual values,which shows that this method has a high reconstruction precision of the element number ratio for concealed explosives. Lastly, it was demonstrated using the simulation study that this method can discriminate explosives,drugs, and common materials, with the capability of determining the existence of concealed bulk explosives and identifying explosive types. 展开更多
关键词 Concealed BULK EXPLOSIVE EXPLOSIVE type IDENTIFICATION TNA ELEMENT NUMBER RATIO
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炸药裂缝中的对流燃烧现象实验研究 预览
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作者 尚海林 杨洁 +3 位作者 胡秋实 李涛 傅华 胡海波 《兵工学报》 EI CAS CSCD 北大核心 2019年第1期99-106,共8页
为研究高能炸药裂缝中燃烧演化规律,加深对武器装药意外点火后发生高烈度反应复杂力学-热学-化学耦合过程的机理性认识,采用热点火方式结合高速摄影、压力测量等测试技术,对奥克托今基JO-9159粘结炸药预置裂缝中燃烧演化过程开展实验观... 为研究高能炸药裂缝中燃烧演化规律,加深对武器装药意外点火后发生高烈度反应复杂力学-热学-化学耦合过程的机理性认识,采用热点火方式结合高速摄影、压力测量等测试技术,对奥克托今基JO-9159粘结炸药预置裂缝中燃烧演化过程开展实验观测。结合气动壅塞理论分析了裂缝宽度对燃烧演化的影响。结果表明:在较强约束条件下,炸药内部亚毫米宽度的裂缝燃烧能够产生超过200MPa的压力,火焰传播速度超过600m/s;裂缝宽度越大,装置解体前燃烧产生的峰值压力越低,对流燃烧传播速度越快。 展开更多
关键词 炸药 裂缝 传导燃烧 对流燃烧
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惯性起爆弹丸内装药摩擦起爆特性 预览
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作者 章猛华 张成 +1 位作者 阮文俊 王健 《弹道学报》 CSCD 北大核心 2019年第3期36-40,45共6页
为了对惯性起爆弹丸的起爆特性进行定量分析,对弹丸的撞击起爆过程进行了试验研究。根据炸药的热起爆理论,建立了装药的摩擦起爆模型;结合LS-DYNA软件对装药的惯性撞击特性进行分析,得到了不同工况下装药的摩擦温升曲线。结果表明:在弹... 为了对惯性起爆弹丸的起爆特性进行定量分析,对弹丸的撞击起爆过程进行了试验研究。根据炸药的热起爆理论,建立了装药的摩擦起爆模型;结合LS-DYNA软件对装药的惯性撞击特性进行分析,得到了不同工况下装药的摩擦温升曲线。结果表明:在弹丸能够有效穿透靶板的情况下,弹丸的着靶速度越低,装药所受的惯性冲量越大,装药越容易被起爆。计算得到的钝化RDX与钢惯性体之间的滑动摩擦系数为0.04。将数值计算与试验测量的结果进行了对比分析,验证了摩擦起爆模型的有效性。 展开更多
关键词 爆炸力学 炸药 惯性作用 摩擦起爆 起爆时间
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32例爆炸致非穿透性角膜外伤临床治疗分析 预览
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作者 曾明范 《实用医药杂志》 2019年第4期304-306,310共4页
目的探讨不同损伤程度的爆炸性角膜外伤治疗的临床疗效。方法回顾性分析病例 32 例爆炸性角膜外伤, 8 眼角膜裂伤<3 mm 者,行角膜浅层异物剔除等保守治疗;30 眼角膜裂伤>3 mm 且伤口不规整伤口者行角膜异物剔除、角膜裂伤缝合、... 目的探讨不同损伤程度的爆炸性角膜外伤治疗的临床疗效。方法回顾性分析病例 32 例爆炸性角膜外伤, 8 眼角膜裂伤<3 mm 者,行角膜浅层异物剔除等保守治疗;30 眼角膜裂伤>3 mm 且伤口不规整伤口者行角膜异物剔除、角膜裂伤缝合、羊膜遮盖的综合治疗。对角膜上皮修复、角膜裂伤愈合、角膜新生血管生长情况进行观察分析。结果 8 眼角膜裂伤<3 mm 者术后 1 周角膜上皮愈合,遗留浅层角膜薄翳。 30 眼角膜裂伤>3 mm 者术后 3~4 周羊膜溶解后观察到角膜上皮愈合、角膜裂伤瘢痕混浊;随访 1~6 个月, 84.21%( 32/38 眼)无角膜新生血管生长。结论对不同损伤的爆炸性角膜外伤采用不同治疗方法是切实有效的,羊膜遮盖术在促进角膜上皮愈合、减轻瘢痕混浊和抑制新生血管生长方面疗效显著。 展开更多
关键词 爆炸性 角膜外伤 综合治疗 羊膜遮盖
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Mechanism and characteristics of thermal action of HMX explosive mixture containing high-efficiency fuel
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作者 LIU JiPing YANG WeiWei +1 位作者 LIU Ying LIU XiaoBo 《中国科学:技术科学英文版》 SCIE EI CAS CSCD 2019年第4期578-586,共9页
In this study,the thermal stability and detonation properties of three types of explosives were investigated.Results indicated that nanoaluminum powder improved the detonation properties of HMX by increasing the speci... In this study,the thermal stability and detonation properties of three types of explosives were investigated.Results indicated that nanoaluminum powder improved the detonation properties of HMX by increasing the specific surface area of HMX,which substantially increased the explosion heat and power.The decomposition temperatures of the three explosives containing aluminum hydride,ammonia borane,and nanoaluminum powder during slow cook-off at heating rates of 1.5 and 10℃ min–1 were measured as 246℃ and 241℃,256℃ and 261℃,and 238°C and 264℃,respectively.The explosives containing hydrogen storage materials swelled;however,the nanoaluminum powder was only slightly peeled off at the edge of the grains during cookoff.Differential scanning calorimetry(DSC)curves of the explosives containing hydrogen storage materials exhibited endothermic and exothermic peaks before the major exothermic reaction peak during the cook-off tests.In contrast,only one weak peak was observed in the DSC curve of the explosive containing nanoaluminum powder before the major exothermic reaction.In addition,the additives and adhesives catalyzed the slow cook-off decomposition,which caused the transformation of HMX crystals and accelerated the thermal decomposition reaction of HMX.The addition of high-density hydrogen storage materials to HMX resulted in detonation heats and explosion powers much greater than cure HMX.This improved performance was attributed to the hydrogen storage materials in the explosives participating in a secondary reaction in the reaction zone at the instant of the explosion,effectively realizing complementary lossless energy and thus greatly improving the explosive power of the explosives. 展开更多
关键词 HIGH-DENSITY hydrogen storage material nanoparticles THERMAL stability cook-off EXPLOSIVE performance DETONATION reaction
Analysis of global momentum transfer due to buried mine detonation 预览
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作者 N.Heider V.Denefeld H.Aurich 《Defence Technology(防务技术)》 CAS CSCD 2019年第5期821-827,共7页
The emergence of improvised explosive devices (IED) significantly extended the spectrum of possiblethreat mechanisms to military vehicles and their occupants. Especially buried high explosive (HE)charges lead to new a... The emergence of improvised explosive devices (IED) significantly extended the spectrum of possiblethreat mechanisms to military vehicles and their occupants. Especially buried high explosive (HE)charges lead to new and originally not investigated loading conditions during their detonation. It is theinteraction of the embedding geomaterial with the detonation products that leads to a strongly increasedglobal impulse transfer on the vehicle with following high accelerations on the vehicle occupant. Thispaper presents a comprehensive approach for the analysis of occupant loading. In a first step, we presentthe so called ring technology which allows the experimental determination of the locally resolvedspecific impulse distribution on a vehicle floor due to buried charge detonation. A complementarymethod is the use of scaled model vehicles that allows the determination of global vehicle loading parameterssuch as jump height or vehicle accelerations. Both techniques were used to study the influenceof burial conditions as burial depth, embedding material or water content on the impulse transfer ontothe vehicle. These experimental data are used to validate material models for the embedding sand orgravel materials. This validated material description is the basis for numerical simulation models used inthe assessment of occupant safety. In the last step, we present a simulation model for a generic militaryvehicle including a Hybrid III occupant dummy that is used for the determination of biomechanicaloccupant exposure levels. Typical occupant loadings are evaluated and correlated with burial conditionsas HE mass and global momentum transfer. 展开更多
关键词 Improvised EXPLOSIVE device VEHICLE protection OCCUPANT loading
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炸药降感专利技术分析 预览
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作者 李鹤群 刘田元 《江西化工》 2019年第6期257-259,共3页
随着时代的发展,各种新式的战争手段层出不穷,为了提高武器弹药的作战能力,炸药除了要有足够的能量,还应该具有良好的安全性。如何实现炸药的降感是炸药安全性的关键。本文在检索分析了大量有关炸药降感技术领域国内外专利文献的基础上... 随着时代的发展,各种新式的战争手段层出不穷,为了提高武器弹药的作战能力,炸药除了要有足够的能量,还应该具有良好的安全性。如何实现炸药的降感是炸药安全性的关键。本文在检索分析了大量有关炸药降感技术领域国内外专利文献的基础上,概述了炸药降感技术的研究现状,对国内外炸药降感技术的专利申请趋势、申请人分布、技术分支作了分析,为炸药降感技术的研究提供参考信息。 展开更多
关键词 炸药 降感 钝感 专利
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高压水射流破碎炸药过程数值模拟 预览
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作者 黄玉平 崔庆忠 +2 位作者 徐洋 陈明华 吴兴宇 《含能材料》 EI CAS CSCD 北大核心 2019年第5期385-391,I0003共8页
为把高压水射流技术运用到报废弹药处理工程实际中,采用数值模拟的方法,对高压水射流破碎炸药过程进行了研究。建立了以高压水射流速度为输入参数的有限元计算模型,采用拉格朗日(Lagrange)算法和光滑粒子流体动力学(Smoothed Particle H... 为把高压水射流技术运用到报废弹药处理工程实际中,采用数值模拟的方法,对高压水射流破碎炸药过程进行了研究。建立了以高压水射流速度为输入参数的有限元计算模型,采用拉格朗日(Lagrange)算法和光滑粒子流体动力学(Smoothed Particle Hydrodynamics,SPH)算法,运用 DYNA 求解器进行了求解,通过炸药压力、温度、反应度分析,对高压水射流破碎炸药过程的安全性进行了研究,并通过失效单元数量分析对高压水射流破碎炸药过程的有效性进行了研究。结果表明,当高压水射流速度低于800 m·s^-1时,可采用高压水射流对报废弹药炸药装药进行破碎,并能保证破碎过程的安全性;当高压水射流速度为 150~350 m·s^-1时,能较高效地进行大截面破碎;当高压水射流速度为 400~800 m·s-1时,能高效实现小截面破碎。 展开更多
关键词 高压水射流 炸药 数值模拟
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Insights into the phenomenon of an explosive growth and sharp decline in haze:A case study in Beijing
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作者 Wenguang Li Xingang Liu +7 位作者 Yuanhang Zhang Qinwen Tan Miao Feng Mengdi Song Lirong Hui Yu Qu Junling An Haokai Gao 《环境科学学报:英文版》 SCIE EI CAS CSCD 2019年第10期122-132,共11页
A severe haze episode occurred in winter in the North China Plain(NCP),and the phenomenon of an explosive growth and sharp decline in PM2.5(particulate matter with an aerodynamic diameter equal to or less than 2.5μm)... A severe haze episode occurred in winter in the North China Plain(NCP),and the phenomenon of an explosive growth and sharp decline in PM2.5(particulate matter with an aerodynamic diameter equal to or less than 2.5μm)concentration was observed.To study the systematic causes for this phenomenon,comprehensive observations were conducted in Beijing from November 26 to December 2,2015;during this period,meteorological parameters,LIDAR data,and the chemical compositions of aerosols were determined.The haze episode was characterized by rapidly varying PM2.5 concentration,and the highest PM2.5 concentration reached 667μg/m3.During the haze episode,the NCP was dominated by a weak high-pressure system and continuously low PBL(planetary boundary layer)heights,which are unfavorable conditions for the diffusion of pollutants.The large increases in the concentrations of SNA(SO42-,NO3-and NH4+)during the haze implied that the formation of SNA was the largest contribution.Water vapor also played a vital role in the formation of haze by promoting the chemical transformation of secondary pollutants,which led to higher PM2.5 concentrations.The spatial distributions of PM2.5 in Beijing at different times and the backward trajectories of the air masses also indicated that pollutants from surrounding provinces in particular,contributed to the higher PM2.5concentration. 展开更多
关键词 Haze EPISODES EXPLOSIVE GROWTH SHARP DECLINE BEIJING
钝黑-5炸药中硬脂酸质量分数对燃烧转爆轰的影响 预览 被引量:1
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作者 吴海山 王迟 《弹道学报》 CSCD 北大核心 2019年第1期80-84,共5页
为研究炸药中硬脂酸质量分数对燃烧转爆轰的影响,设计了一种传爆装置,在不同温度下对含有不同质量分数硬脂酸的钝黑-5炸药进行传爆试验,收集试验数据并进行分析。试验结果表明:随着温度的降低,低温下钝黑-5炸药燃烧转爆轰后传爆可靠性... 为研究炸药中硬脂酸质量分数对燃烧转爆轰的影响,设计了一种传爆装置,在不同温度下对含有不同质量分数硬脂酸的钝黑-5炸药进行传爆试验,收集试验数据并进行分析。试验结果表明:随着温度的降低,低温下钝黑-5炸药燃烧转爆轰后传爆可靠性变差。当钝黑-5炸药中硬脂酸质量分数在1.0%~1.2%时,传爆装置能够可靠传爆;当硬脂酸质量分数大于1.2%时,其燃烧转爆轰后的输出威力随着硬脂酸质量分数的增加而降低,不能进行有效传爆。 展开更多
关键词 炸药 传爆药 硬脂酸 质量分数 爆轰波
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Effects of intermittent sprint and plyometric training on endurance running performance
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作者 Danny Lum Frankie Tan +1 位作者 Joel Pang Tiago M.Barbosa 《运动与健康科学:英文版》 SCIE 2019年第5期471-477,共7页
Purpose:The purpose of this study was to compare the effects of intermittent sprint training and plyometric training on endurance running performance.Methods:Fourteen moderately trained male endurance runners were all... Purpose:The purpose of this study was to compare the effects of intermittent sprint training and plyometric training on endurance running performance.Methods:Fourteen moderately trained male endurance runners were allocated into either the intermittent sprint training group(n = 7)or the plyometric training group(n = 7).The preliminary tests required subjects to perform a treadmill graded exercise test,a countermovement jump test for peak power measurement,and a 10-km time trial.Training included 12 sessions of either intermittent sprint or plyometric training carried out twice per week.On completion of the intervention,post-tests were conducted.Results:Both groups showed significant reduction in weekly training mileage from pre-intervention during the intervention period.There were significant improvements in the 10-km time trial performance and peak power.There was also significant improvement in relative peak power for both groups.The 10-km time trial performance and relative peak power showed a moderate inverse correlation.Conclusion:These findings showed that both intermittent sprint and plyometric training resulted in improved 10-km running performance despite reduction in training mileage.The improvement in running performance was accompanied by an improvement in peak power and showed an inverse relationship with relative peak power. 展开更多
关键词 Endurance TRAINING Explosive strength TRAINING LEG stiffness MUSCULAR power Running economy Stretch-shortening cycle
遗传-神经网络方法在炸药性能预测中的应用研究
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作者 于国强 董璐阳 王国强 《辽宁化工》 CAS 2019年第7期672-675,共4页
采用炸药的装药粒度、相对密度等因素建立炸药爆轰临界直径的人工神经网络预测模型,并采用遗传算法对预测模型的权值与阈值进行遗传优化,采用遗传-神经网络模型预测炸药的爆轰临界直径。预测结果表明,遗传-神经网络模型预测结果更加准确。
关键词 炸药 临界直径 神经网络 遗传算法
Calculation Method Study on Steel Plate Deformation Under Impulse Loading of Thin Explosive
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作者 罗放 张世联 《上海交通大学学报:英文版》 EI 2019年第2期168-175,共8页
Basis of explosion’s responsive analysis and anti-explosion’s structure design is the relation among thin explosive mass, impulse and plate deformation. In this paper, the limitations of theoretical calculation and ... Basis of explosion’s responsive analysis and anti-explosion’s structure design is the relation among thin explosive mass, impulse and plate deformation. In this paper, the limitations of theoretical calculation and experimental methods are analyzed according to the relation between impulse loading and deformation of steel plate in thin explosive experiment. The time histories of deformation for the square steel plate under the impulse of thin explosive are calculated by the fluid-solid coupling method and the pressure loading method. The advantages of the pressure loading method and the fluid-solid coupling method are compared. The results show that the steel plate deformation can be estimated accurately using the fluid-solid coupling method when the explosive impulse is unknown, while the theoretical calculation and the pressure loading method provide quick and accurate prediction on the steel plate deformation when the explosive impulse is known. 展开更多
关键词 THIN EXPLOSIVE fluid-solid coupling METHOD pressure LOADING METHOD THEORETICAL analysis
基于序贯概率比检验的爆炸物检测系统 预览
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作者 刘轩 郭勇 +4 位作者 景士伟 李明非 郑彦 高亚东 年瑞雪 《吉林大学学报:理学版》 CAS 北大核心 2019年第3期653-657,共5页
设计一种基于标记中子方法的爆炸物检测系统,采用ING-27型中子发生器与硅酸钇镥闪烁晶体(LYSO)γ探测器进行探测,并基于序贯概率比检验(SPRT)方法判别爆炸物.通过对干奶粉、硝铵(AMM)和TNT模拟物进行检测,分析计算测量γ能谱数据中C,N,... 设计一种基于标记中子方法的爆炸物检测系统,采用ING-27型中子发生器与硅酸钇镥闪烁晶体(LYSO)γ探测器进行探测,并基于序贯概率比检验(SPRT)方法判别爆炸物.通过对干奶粉、硝铵(AMM)和TNT模拟物进行检测,分析计算测量γ能谱数据中C,N,O三种元素的特征峰,将所得概率比结果与相应的设定阈值lnA 和lnB 进行比较.结果表明,SPRT方法可应用于爆炸物检测. 展开更多
关键词 序贯概率比检验(SPRT) 爆炸物 能谱 标记中子
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Efficient Network Dismantling via Node Explosive Percolation
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作者 秦绍萌 任晓龙 吕琳媛 《理论物理通讯:英文版》 SCIE CAS CSCD 2019年第6期764-772,共9页
The network dismantling problem asks the minimum separate node set of a graph whose removal will break the graph into connected components with the size not larger than the one percentage of the original graph.This pr... The network dismantling problem asks the minimum separate node set of a graph whose removal will break the graph into connected components with the size not larger than the one percentage of the original graph.This problem has attracted much attention recently and a lot of algorithms have been proposed. However, most of the network dismantling algorithms mainly focus on which nodes are included in the minimum separate set but overlook how to order them for removal, which will lead to low general efficiency during the dismantling process. In this paper,we reformulate the network dismantling problem by taking the order of nodes’ removal into consideration. An efficient dismantling sequence will break the network quickly during the dismantling processes. We take the belief-propagation guided decimation(BPD) dismantling algorithm, a state-of-the-art algorithm, as an example, and employ the node explosive percolation(NEP) algorithm to reorder the early part of the dismantling sequence given by the BPD. The proposed method is denoted as the NEP-BPD algorithm(NBA) here. The numerical results on Erd¨os-R′enyi graphs,random-regular graphs, scale-free graphs, and some real networks show the high general efficiency of NBA during the entire dismantling process. In addition, numerical computations on random graph ensembles with the size from 210 to219 exhibit that the NBA is in the same complexity class with the BPD algorithm. It is clear that the NEP method we used to improve the general efficiency could also be applied to other dismantling algorithms, such as Min-Sum algorithm,equal graph partitioning algorithm and so on. 展开更多
关键词 NETWORK DISMANTLING EXPLOSIVE PERCOLATION NETWORK ROBUSTNESS feedback VERTEX set
不同能量输出结构战斗部水下爆炸毁伤威力试验研究 预览
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作者 鲁忠宝 黎勤 哈海荣 《水下无人系统学报》 北大核心 2019年第1期71-77,共7页
水中兵器战斗部对大型水面舰船的爆炸毁伤威力,除了与作用距离相关之外,还与作用方位、战斗部的装药品种、起爆方式等都有密切关系。为了得出攻击大型水面舰战斗部所需最佳攻击方位,以及装药与起爆方式设计准则,文中选取典型炸药品种、... 水中兵器战斗部对大型水面舰船的爆炸毁伤威力,除了与作用距离相关之外,还与作用方位、战斗部的装药品种、起爆方式等都有密切关系。为了得出攻击大型水面舰战斗部所需最佳攻击方位,以及装药与起爆方式设计准则,文中选取典型炸药品种、典型起爆方式的战斗部装药,进行水下爆炸全方位威力场参数的试验测试,以及典型战斗部底部爆炸对舰船目标模拟靶响应的试验测试,得出了不同能量输出结构战斗部水中爆炸能量的输出规律及其对舰船目标的毁伤规律,确定了水中兵器战斗部适宜选取总能量高、气泡能也高的炸药品种,采用底部攻击及定向起爆方式,使能量汇聚方向朝上,以获取最佳毁伤效果。文中的研究可为打击大型水面舰船的水中兵器战斗部总体设计提供参考。 展开更多
关键词 水中兵器 战斗部 炸药 起爆方式 水面舰船 毁伤
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复合壳体对炸药抗破片冲击起爆影响研究 预览
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作者 赵宇峰 路志超 +2 位作者 董永香 安二峰 冯顺山 《振动与冲击》 EI CSCD 北大核心 2019年第20期126-130,147共6页
主要针对复合壳体对炸药抗破片冲击起爆的防护问题,基于仿真和实验结果可行性校验基础上,开展了不同复合壳体对炸药层内压力峰值、能量变化等影响特性研究。通过不同中间层复合壳体方案的对比可知,低波阻抗复合壳体(钢-聚脲树脂-钢)可... 主要针对复合壳体对炸药抗破片冲击起爆的防护问题,基于仿真和实验结果可行性校验基础上,开展了不同复合壳体对炸药层内压力峰值、能量变化等影响特性研究。通过不同中间层复合壳体方案的对比可知,低波阻抗复合壳体(钢-聚脲树脂-钢)可使炸药层压力峰值大幅下降为单一钢壳体的36%;结果同时表明中间层材料比强度越高,抗破片侵彻和吸能性能越强;改变复合壳体排列顺序,将聚脲树脂作为壳体内衬时,炸药层峰值压力仅为单一钢壳体的30%,传入炸药层的能量比单一钢壳体降低近一个数量级;当复合壳体厚度与单一钢壳体相同时,钢-聚脲树脂复合壳体中炸药的峰值压力降为单一钢壳体的64%,传入炸药层的能量减少约一半。由此可见复合壳体显著降低了破片作用下炸药层的峰值压力和传入炸药的能量,可有效提高炸药抗破片冲击起爆的能力。研究结果可为复合壳体用于炸药抗冲击起爆的设计与分析提供重要参考。 展开更多
关键词 复合壳体 炸药 冲击起爆 压力峰值 吸能性能
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Study the operating conditions on agglomeration of RDX particles in anti-solvent crystallization by using statistical optimization 预览
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作者 Hamid Reza Pouretedal Sajjad Damiri Ali Zandi 《Defence Technology(防务技术)》 CAS CSCD 2019年第2期233-240,共8页
The unfavorable growth and agglomeration of micro-particles of RDX explosive was almost observed in manufacture process.For preventing of growth of micro-particles and agglomeration in anti-solvent crystallization pro... The unfavorable growth and agglomeration of micro-particles of RDX explosive was almost observed in manufacture process.For preventing of growth of micro-particles and agglomeration in anti-solvent crystallization process,the effect of additives glucose,sucrose and poly ethylene glycol-2000 and wetting solvent of isopropyl alcohol were studied.Taguchi experimental design was used for optimization of the operating conditions.The type of additive,the amount of additive(%wt.),solvent of wetting and wetting time were selected for optimization of the conditions.By using 4 factor and 3 levels,27 experiments were conducted(L27).Results showed that in the presence of 2%wt.of sucrose additive and isopropyl alcohol solvent,the agglomerations of particles were decreased so that a decrease 30e50%in the average of particles size was seen.Addition additives were effective in storage container and for reduce the agglomeration of particles during storage.Also,the agglomeration rate of particles was reduced over time at optimized conditions.Imaging optical microscopy,scanning electron microscopy(SEM),and particle size analyzer(PSA)methods were used for particles size analyzing as a response in statistical optimization and quality control of the final product.The sensitivity to some mechanical and shock stimuli on the RDX in presence of sucrose additive was tested and the obtained results showed the insignificant effect of additive on the safety properties of pure RDX. 展开更多
关键词 RDX EXPLOSIVE Taguchi experimental design AGGLOMERATION ADDITIVE ANTI-SOLVENT
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Assembly of Two Isostructural Metal-organic Frameworks Based on Hetero-N,O Donor Ligand for Detecting Nitro Explosives
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作者 WANG Dongmei LOU Shengjun +2 位作者 YING Yiting GUO Zhiqi WANG Lijun 《高等学校化学研究:英文版》 SCIE CAS CSCD 2019年第5期762-766,共5页
Two isostructural metal-organic frameworks,[NO3][M3(H2O)3O(TBA)3]-2DMF-6H2O(1 and 2)[M=In and Fe, H2TBA=4-(1H-tetrazol-5-yl)-benzoic acid], have been successfully synthesized. Compounds 1 and 2 have three-dimensional ... Two isostructural metal-organic frameworks,[NO3][M3(H2O)3O(TBA)3]-2DMF-6H2O(1 and 2)[M=In and Fe, H2TBA=4-(1H-tetrazol-5-yl)-benzoic acid], have been successfully synthesized. Compounds 1 and 2 have three-dimensional structures bridged via the typical 6-connected tri-nuclear cluster units M3O(COO)6 and linear linker H2TBA. The whole 3D framework possesses a 6-connected acs topology. Notably, by the fluorescence technique, compound 1 can detect nitro explosives through fluorescence quenching effect, especially for 2,4,6-trinitrophenol(TNP, Ksv=3.64×10^4 L/mol). Furthermore, the fluorescence spectrum red shifts as the number of NO2 group increases. Based on the aforementioned consideration, compound 1 can be considered as a potential luminescent probe for the detection of TNP. 展开更多
关键词 METAL-ORGANIC framework Crystal structure Fluorescence detection NITRO EXPLOSIVE
Explosive synchronization of multi-layer frequency-weighted coupled complex systems
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作者 金彦亮 姚林 +3 位作者 郭维思 王瑞 王雪 罗雪涛 《中国物理B:英文版》 SCIE EI CAS CSCD 2019年第7期168-173,共6页
Synchronization is a phenomenon that is ubiquitous in engineering and natural ecosystems.The study of explosive synchronization on a single-layer network gives the critical transition coupling strength that causes exp... Synchronization is a phenomenon that is ubiquitous in engineering and natural ecosystems.The study of explosive synchronization on a single-layer network gives the critical transition coupling strength that causes explosive synchronization.However, no significant findings have been made on multi-layer complex networks.This paper proposes a frequency-weighted Kuramoto model on a two-layer network and the critical coupling strength of explosive synchronization is obtained by both theoretical analysis and numerical validation.It is found that the critical value is affected by the interaction strength between layers and the number of network oscillators.The explosive synchronization will be hindered by enhancing the interaction and promoted by increasing the number of network oscillators.Our results have importance across a range of engineering and biological research fields. 展开更多
关键词 EXPLOSIVE SYNCHRONIZATION KURAMOTO model complex systems
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