期刊文献+
共找到295篇文章
< 1 2 15 >
每页显示 20 50 100
Damage of multi-layer spaced metallic target plates impacted by radial layered PELE 被引量:5
1
作者 Chun Cheng Zhong-hua Du +4 位作者 Xi Chen Li-zhi Xu Cheng-xin Du Ji-long Han Xiao-dong Wang 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2020年第1期201-207,共7页
Three different kinds of PELE(the penetrator with lateral efficiency) were launched by ballistic artillery to impact the multi-layer spaced metal target plates.The lmpact velocities of the projectiles were measured by... Three different kinds of PELE(the penetrator with lateral efficiency) were launched by ballistic artillery to impact the multi-layer spaced metal target plates.The lmpact velocities of the projectiles were measured by the velocity measuring system.The damage degree and process of each laye r of target plate impacted by the three kinds of projectiles were analyzed.The experimental results show that all the three kinds of projectiles have the effect of expanding holes on the multi-layer spaced metal target plates.For the normal structure PELE(without layered) with tungsten alloy jacket and the radial layered PELE with tungsten alloy jacket,the diameters of holes on the seco nd layer of plates are 3.36 times and 3.76 times of the diameter of the projectile,re spectively.For radial layered PELE with W/Zr-based amorphous composite jacket,due to the large number of tungsten wires dispersed after the impact,the diameter of the holes on the four-layer spaced plates can reach 2.4 times,3.04 times,5.36 times and 2.68 times of the diameter of the projectile.Besides,the normal structure PELE with tungsten alloy jacket and the radial layered PELE whit tungsten alloy jacket formed a large number of fragments impact marks on the third target plate.Although the number of fragments penetrating the third target plate is not as large as that of the normal structure PELE,the area of dispersion of fragments impact craters on the third target plate is larger by the radial layered PELE.The radial layered PELE with W/Zr-based amorphous composite jacket released a lot of heat energy due to the impact of the matrix material,and formed a large area of ablation marks on the last three target plates. 展开更多
关键词 PELE(the PENETRATOR with lateral efficiency) MULTI-LAYER spaced metal target PLATES Impact DAMAGE
下载PDF
Dependence of impact regime boundaries on the initial temperatures of projectiles and targets
2
作者 Stefano Signetti Andreas Heine 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2024年第1期49-57,共9页
Towards higher impact velocities,ballistic events are increasingly determined by the material temperatures.Related effects might range from moderate thermal softening to full phase transition.In particular,it is of gr... Towards higher impact velocities,ballistic events are increasingly determined by the material temperatures.Related effects might range from moderate thermal softening to full phase transition.In particular,it is of great interest to quantify the conditions for incipient or full melting of metals during impact interactions,which result in a transition from still strength-affected to hydrodynamic material behavior.In this work,we investigate to which extent the respective melting thresholds are also dependent on the initial,and generally elevated,temperatures of projectiles and targets before impact.This is studied through the application of a model developed recently by the authors to characterize the transition regime between high-velocity and hypervelocity impact,for which the melting thresholds of materials were used as the defining quantities.The obtained results are expected to be of general interest for ballistic application cases where projectiles or targets are preheated.Such conditions might result,for example,from aerodynamic forces acting onto a projectile during atmospheric flight,explosive shapedcharge-jet formation or armor exposure to environmental conditions.The performed analyses also broaden the scientific understanding of the relevance of temperature in penetration events,generally known since the 1960s,but often not considered thoroughly in impact studies. 展开更多
关键词 Ballistic impact Thermal effects metallic targets Energy partitioning Homologous temperature
下载PDF
Double-layered skeleton of Li alloy anchored on 3D metal foam enabling ultralong lifespan of Li anode under high rate
3
作者 Chaohui Wei Zeyu Yao +7 位作者 Jin Ruan Zhicui Song Aijun Zhou Yingze Song Donghuang Wang Jicheng Jiang Xin Wang Jingze Li 《Chinese Chemical Letters》 SCIE CAS CSCD 2024年第3期479-485,共7页
The high specific capacity and low negative electrochemical potential of lithium metal anodes(LMAs),may allow the energy density threshold of Li metal batteries(LMBs)to be pushed higher.However,the existing detrimenta... The high specific capacity and low negative electrochemical potential of lithium metal anodes(LMAs),may allow the energy density threshold of Li metal batteries(LMBs)to be pushed higher.However,the existing detrimental issues,such as dendritic growth and volume expansion,have hindered the practical implementation of LMBs.Introducing three-dimensional frameworks(e.g.,copper and nickel foam),have been regarded as one of the fundamental strategies to reduce the local current density,aiming to extend the Sand'time.Nevertheless,the local environment far from the skeleton is almost the same as the typical plane Li,due to macroporous space of metal foam.Herein,we built a double-layered 3D current collector of Li alloy anchored on the metal foam,with micropores interconnected macropores,via a viable thermal infiltration and cooling strategy.Due to the excellent electronic and ionic conductivity coupled with favorable lithiophilicity,the Li alloy can effectively reduce the nucleation barrier and enhance the Li^(+)transportation rate,while the metal foam can role as the primary promotor to enlarge the surface area and buffer the dimensional variation.Synergistically,the Li composite anode with hierarchical structure of primary and secondary scaffolds realized the even deposition behavior and minimum volume expansion,outputting preeminent prolonged cycling performances under high rate. 展开更多
关键词 double-layered skeleton Li alloy 3D metal foam Ultralong lifespan Lithium metal batteries High rate
原文传递
Preparation and Characterization of Rare Earth Metal and Alloy Target Materials for Manufacturing Magneto-Optical Disks
4
作者 张志宏 邱巨峰 +1 位作者 马志鸿 于雅樵 《Journal of Rare Earths》 SCIE EI CAS CSCD 2007年第S1期440-443,共4页
The studies were made on the preparation processes of the rare earth metal and alloy target materials and their characterization. In this work the rare earth metals were prepared by electrolysis of the oxide in molten... The studies were made on the preparation processes of the rare earth metal and alloy target materials and their characterization. In this work the rare earth metals were prepared by electrolysis of the oxide in molten salt for Nd metal and metallothermic reduction of the fluorides for Gd, Tb, Dy metals. After vacuum refining and distillation purification these rare earth metals were used for manufacturing the element targets, mosaic targets and as the starting materials of preparing the rare earth-transition metal (RE-TM) alloy targets. The four kinds of Dy-FeCo, NdDy-FeCo, Tb-FeCo and GdTb-FeCo alloy targets with diameter of 100 mm and thickness of 3 mm were prepared using powder metallurgical technique. The oxygen content and microstructure of the prepared RE-TM cast alloys and sintered targets were analyzed. The features and requirements of the RE-TM alloy sputtering target materials were also discussed. 展开更多
关键词 rare earth metal ALLOY target material SPUTTERING magneto-optical recording media
下载PDF
Numerical Study on the Two-Dimensional Temperature Fields of Titanium/Aluminum Double-Layer Target Irradiated by High-Intensity Pulsed Ion Beam
5
作者 吴迪 雷明凯 +1 位作者 朱小鹏 宫野 《Plasma Science and Technology》 SCIE EI CAS CSCD 2010年第5期581-584,共4页
Interaction between high-intensity pulsed ion beam (HIPIB) and a double-layer target with titanium film on top of aluminum substrate was simulated. The two-dimensional nonlinear thermal conduction equations, with th... Interaction between high-intensity pulsed ion beam (HIPIB) and a double-layer target with titanium film on top of aluminum substrate was simulated. The two-dimensional nonlinear thermal conduction equations, with the deposited energy in the target taken as source term, were derived and solved by finite differential method. As a result, the two-dimensional spatial and temporal evolution profiles of temperature were obtained for a titanium/aluminum double-layer target irradiated by a pulse of HIPIB. The effects of ion beam current density on the phase state of the target materials near the film and substrate interface were analyzed. Both titanium and aluminum were melted near the interface after a shot when the ion beam current density fell in the range of 100 A/cm2 to 200 A/cm2. 展开更多
关键词 high-intensity pulsed ion beam double-layer target temperature fields numerical method
下载PDF
Role of localised surface plasmon polaritons coupling in optical transmission through double-layer metal apertures
6
作者 龚志强 刘坚强 《Chinese Physics B》 SCIE EI CAS CSCD 2010年第6期487-492,共6页
In this paper, we investigate the optical properties of the double-layer metal films perforated with single apertures by analysing the coupling of localized surface plasmon polaritons (LSPPs). It is found that the a... In this paper, we investigate the optical properties of the double-layer metal films perforated with single apertures by analysing the coupling of localized surface plasmon polaritons (LSPPs). It is found that the amplitude and the wavelength of transmission peak in such a structure can be adjusted by changing the longitudinal interval D between two films and the lateral displacements dx and dy which are parallel and perpendicular to the polarization direction of incident light, respectively. The variation of longitudinal interval D results in the redshift of transmission peak due to the change of coupling strength of LSPPs near the single apertures. The amplitude of transmission peak decreases with the increase of dy and is less than that in the case of dx, which originates from the difference in coupling manner between LSPPs and the localized natures of LSPPs. 展开更多
关键词 enhanced transmission localized surface plasmon polaritons double-layer metal apertures
下载PDF
High-Yield High-Efficiency Positron Generation in High-Z Metal Targets Irradiated by Laser Produced Electrons from Near-Critical Density Plasmas
7
作者 宋炜 胡荣豪 +7 位作者 寿寅任 弓正 余金清 林晨 马文君 赵研英 卢海洋 颜学庆 《Chinese Physics Letters》 SCIE CAS CSCD 2017年第8期96-100,共5页
An improved indirect scheme for laser positron generation is proposed. The positron yields in high-ZZ metal targets irradiated by laser produced electrons from near-critical density plasmas and underdense plasma are i... An improved indirect scheme for laser positron generation is proposed. The positron yields in high-ZZ metal targets irradiated by laser produced electrons from near-critical density plasmas and underdense plasma are investigated numerically. It is found that the positron yield is mainly affected by the number of electrons of energies up to several hundreds of MeV. Using near-critical density targets for electron acceleration, the number of high energy electrons can be increased dramatically. Through start-to-end simulations, it is shown that up to 6.78×10106.78×1010 positrons can be generated with state-of-the-art Joule-class femtosecond laser systems. 展开更多
关键词 High-Yield High-Efficiency Positron Generation in High-Z metal targets Irradiated by Laser Produced Electrons from Near-Critical Density Plasmas DLA
下载PDF
Gas-and plasma-driven hydrogen permeation behavior of stagnant eutectic-solid GaInSn/Fe double-layer structure
8
作者 荆文娜 刘建星 +8 位作者 郭恒鑫 王思蜀 毕海林 陈波 陈建军 王宏彬 韦建军 叶宗标 芶富均 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第4期482-492,共11页
Gas-driven permeation(GDP)and plasma-driven permeation(PDP)of hydrogen gas through Ga In Sn/Fe are systematically investigated in this work.The permeation parameters of hydrogen through Ga In Sn/Fe,including diffusivi... Gas-driven permeation(GDP)and plasma-driven permeation(PDP)of hydrogen gas through Ga In Sn/Fe are systematically investigated in this work.The permeation parameters of hydrogen through Ga In Sn/Fe,including diffusivity,Sieverts'constant,permeability,and surface recombination coefficient are obtained.The permeation flux of hydrogen through Ga In Sn/Fe shows great dependence on external conditions such as temperature,hydrogen pressure,and thickness of liquid Ga In Sn.Furthermore,the hydrogen permeation behavior through Ga In Sn/Fe is well consistent with the multilayer permeation theory.In PDP and GDP experiments,hydrogen through Ga In Sn/Fe satisfies the diffusion-limited regime.In addition,the permeation flux of PDP is greater than that of GDP.The increase of hydrogen plasma density hardly causes the hydrogen PDP flux to change within the test scope of this work,which is due to the dissolution saturation.These findings provide guidance for a comprehensive and systematic understanding of hydrogen isotope recycling,permeation,and retention in plasma-facing components under actual conditions. 展开更多
关键词 liquid metals double-layER gas-driven permeation plasma-driven permeation
下载PDF
Nd: YAG Laser Plasma Interaction with Metal Target
9
作者 Ahmad Hadi Ali Noriah Bidin 《材料科学与工程(中英文版)》 2010年第2期14-18,共5页
关键词 激光等离子体相互作用 Nd:YAG激光 金属目标 尼康COOLPIX 激光诱导等离子体 脉冲持续时间 CCD数码相机 工件材料
下载PDF
Evaluation of Some Selected Metals in Rice Cultivated in Four Local Government Areas in Enugu State, Nigeria
10
作者 Christopher O. Alisa Samuel C. Nwobodo +4 位作者 Edith N. Alisa Peter C. Okeke Ali Bilar Jailen Doyle Lovell Agwaramgbo 《Journal of Geoscience and Environment Protection》 2023年第11期141-150,共10页
In this study, we investigated the presence of Zn, Fe, Cu, and Ca in rice cultivated in four local government areas (Nkanu East, Aninri, Uzo Uwani, Isi Uzo) within Enugu state, Nigeria. We employed an Atomic Absorptio... In this study, we investigated the presence of Zn, Fe, Cu, and Ca in rice cultivated in four local government areas (Nkanu East, Aninri, Uzo Uwani, Isi Uzo) within Enugu state, Nigeria. We employed an Atomic Absorption Spectrometer with an air acetylene flame to analyze these metals after digesting the rice samples. Risk assessment studies were carried out to determine any potential health risk to consumers by evaluating the estimated daily intake (EDI), the target hazard quotient (THQ) and hazard index (HI). The average concentration (mg/kg) of trace metals in the rice samples was within the acceptable limits established by FAO/WHO. Specifically, Zn ranged from 0.265 to 0.632 mg/kg, Fe from 2.73 to 4.131 mg/kg, Cu from 0.205 to 4.131 mg/kg, and Ca from 9.718 to 12.150 mg/kg. There were no statistically significant differences in metal concentrations among the various locations. Consequently, the rice analyzed in this study can be considered safe for consumption. The calculated EDI (mg/kg-day) values were below the maximum tolerable daily intake thresholds. THQ values also fell within safe levels, and the HI values were less than 1, signifying no potential health risks associated with consuming rice from these locations. In conclusion, there is no significant non-carcinogenic health risk associated with exposure to trace metals through the consumption of rice from these areas. 展开更多
关键词 Trace metals RICE Risk Assessment target Hazard Quotient Hazard Index ENUGU
下载PDF
深振荡磁控溅射放电等离子体脉冲特性
11
作者 高剑英 李玉阁 雷明凯 《物理学报》 SCIE EI CAS CSCD 北大核心 2024年第16期162-170,共9页
深振荡脉冲磁控溅射(deep oscillation magnetron sputtering,DOMS)以一系列微脉冲振荡波形的形式向靶提供能量,提供高密度等离子体的同时能够实现完全消除电弧放电和提高靶材原子离化率,实现高质量薄膜的沉积制备.针对DOMS微脉冲放电... 深振荡脉冲磁控溅射(deep oscillation magnetron sputtering,DOMS)以一系列微脉冲振荡波形的形式向靶提供能量,提供高密度等离子体的同时能够实现完全消除电弧放电和提高靶材原子离化率,实现高质量薄膜的沉积制备.针对DOMS微脉冲放电形式拓宽放电参数空间,提高工艺灵活性的特点,建立脉冲等离子体整体模型,测量充电电压DCint=300-380 V和微脉冲开启时间τon=2-6μs的Cr靶放电电压电流,将电压电流波形作为模型输入条件,获得DOMS放电等离子体参数随时间变化规律.充电电压300 V,等离子体峰值密度由τon=2μs的1.34×10^(18) m^(-3)增至τon=3μs的2.64×10^(18) m^(-3),τon由3μs增至6μs时,等离子体峰值密度基本不变.靶材离化率随τon变化趋呈现相近趋势,由τon=2μs的12%增至τon=3μs的20%,τon进一步增至6μs,离化率基本保持不变.固定τon=6μs,DCint由300 V升高至380 V,等离子体峰值密度由2.67×10^(18) m^(-3)增至3.90×10^(18) m^(-3),金属离化率由21%增至28%.DOMS放电具有高功率脉冲磁控溅射典型的金属自溅射现象,峰值自溅射参数Πpeak随功率密度线性增大,表明峰值功率密度是调控DOMS放电中金属自溅射的主要参数.Πpeak最高达到0.20,金属自溅射程度远高于常规脉冲直流磁控溅射,等离子体密度和沉积通量中金属离化率提高,原子沉积带来的阴影效应减轻,是DOMS沉积薄膜质量提高的原因. 展开更多
关键词 深振荡磁控溅射 磁控等离子体 整体模型 CR 金属自溅射
下载PDF
核聚变装置偏滤器靶板材料选择与研究进展
12
作者 吴玉程 盛学洋 +3 位作者 马冰 王珊 张一帆 刘家琴 《中国材料进展》 CAS CSCD 北大核心 2024年第9期807-823,共17页
可控热核聚变能是人类最理想的清洁能源之一,是解决人类能源和环境问题的根本途径。目前,可控热核聚变能的发展面临诸多挑战,偏滤器靶板作为磁约束核聚变装置中的重要部件,其设计和制造是维持等离子体放电、实现核聚变反应堆稳定运行亟... 可控热核聚变能是人类最理想的清洁能源之一,是解决人类能源和环境问题的根本途径。目前,可控热核聚变能的发展面临诸多挑战,偏滤器靶板作为磁约束核聚变装置中的重要部件,其设计和制造是维持等离子体放电、实现核聚变反应堆稳定运行亟需解决的关键问题之一。作为等离子体轰击最严重区域,偏滤器靶板经受着高能粒子流辐照和高热负荷冲击(10 MW·m^(-2)稳态负荷和20 MW·m^(-2)瞬态负荷),同时承担着磁约束聚变装置最主要的排热功能。因此,研发具有优异性能的靶板材料是推动核聚变能发展的关键一步。目前,金属铍、碳基材料以及钨基材料是主要的3种偏滤器靶板候选材料。基于国内外现有研究成果,论述了偏滤器靶板材料的选择与研究进展,对比分析了3种候选材料的优势以及存在的问题,以期为偏滤器靶板材料的选择、研发提供借鉴。 展开更多
关键词 核聚变能 金属铍 碳基材料 钨基材料 偏滤器靶板材料
下载PDF
冬虫夏草及其近缘品中铅、镉、砷污染评价及人体健康累积风险评估方法探索 被引量:1
13
作者 张众谋 康帅 +6 位作者 左甜甜 孔德娟 刘月帅 石佳 郑玉光 金红宇 马双成 《中国现代中药》 CAS 2024年第1期80-87,共8页
目的:对冬虫夏草及其近缘品中铅(Pb)、镉(Cd)、砷(As)的残留量进行测定,探索符合冬虫夏草及相关产品使用特点的污染评价及人体健康风险评估方法。方法:基于冬虫夏草及其近缘品中Pb、Cd、As的残留量监测数据,综合运用单因子污染指数法、... 目的:对冬虫夏草及其近缘品中铅(Pb)、镉(Cd)、砷(As)的残留量进行测定,探索符合冬虫夏草及相关产品使用特点的污染评价及人体健康风险评估方法。方法:基于冬虫夏草及其近缘品中Pb、Cd、As的残留量监测数据,综合运用单因子污染指数法、尼梅罗综合指数法、金属污染指数法对冬虫夏草及其近缘品进行重金属污染评价,计算重金属日暴露量,分别采用危害指数法和更加精确的靶器官毒性剂量法对Pb、Cd、As联合暴露产生的健康风险进行累积风险评估。结果:污染评价结果说明,冬虫夏草及其近缘品中As的污染应引起关注,不同品种污染程度为冬虫夏草(繁育品)=蛹虫草<冬虫夏草(野生品)<香棒虫草<亚香棒虫草;人体健康风险评估结果表明,对于心血管和神经系统,1批冬虫夏草(野生品)全草中Pb、Cd、As联合暴露产生的累积健康风险需被进一步关注。结论:冬虫夏草及其近缘品重金属污染评价,以及人体健康风险评估方法,可为中药安全性评价及相关限量标准的制修订提供参考。 展开更多
关键词 冬虫夏草 重金属 单因子污染指数法 尼梅罗综合指数法 金属污染指数法 靶器官毒性剂量法
下载PDF
磁性金属-有机框架复合材料作为抗癌药物载体的研究进展
14
作者 付巧芳 吴瑛 《中国兽医杂志》 CAS 北大核心 2024年第4期104-110,共7页
金属-有机框架(MOFs)凭借其高孔隙率和大比表面积所带来的载药空间,成为药物递送领域研究的热点。近年来,兴起了一种新型磁性框架复合材料(MFCs),MFCs保留了MOFs的载药率和生物安全性较高的性能,同时增加了磁靶向和磁热疗性能。本文对M... 金属-有机框架(MOFs)凭借其高孔隙率和大比表面积所带来的载药空间,成为药物递送领域研究的热点。近年来,兴起了一种新型磁性框架复合材料(MFCs),MFCs保留了MOFs的载药率和生物安全性较高的性能,同时增加了磁靶向和磁热疗性能。本文对MFCs的制备方法、种类、作为抗癌药物载体的特点以及药物递送时的作用方式进行综述,并对MFCs在实际应用中面临的挑战进行总结,以期为未来的研究工作提供参考依据。 展开更多
关键词 磁性-金属有机框架 癌症 磁性粒子 靶向 磁热疗
下载PDF
High-stability double-layer polymer-inorganic composite electrolyte fabricated through ultraviolet curing process for solid-state lithium metal batteries
15
作者 Xinghua Liang Pengcheng Shen +7 位作者 Lingxiao Lan Yunmei Qin Ge Yan Meihong Huang Xuanan Lu Qiankun Hun Yujiang Wang Jixuan Wang 《Frontiers of Materials Science》 SCIE CSCD 2024年第2期117-128,共12页
Electrolyte interface resistance and low ionic conductivity are essential issues for commercializing solid-state lithium metal batteries(SSLMBs).This work details the fabrication of a double-layer solid composite elec... Electrolyte interface resistance and low ionic conductivity are essential issues for commercializing solid-state lithium metal batteries(SSLMBs).This work details the fabrication of a double-layer solid composite electrolyte(DLSCE)for SSLMBs.The composite comprises poly(vinylidene fluoride-co-hexafluoropropylene)(PVDF-HFP)and poly(methyl methacrylate)(PMMA)combined with 10 wt.%of Li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)(LLZTO),synthesized through an ultraviolet curing process.The ionic conductivity of the DLSCE(2.6×10^(-4) S·cm^(-1))at room temperature is the high lithium-ion transference number(0.57),and the tensile strength is 17.8 MPa.When this DLSCE was assembled,the resulted LFP/DLSCE/Li battery exhibited excellent rate performance,with the discharge specific capacities of 162.4,146.9,93.6,and 64.0 mA·h·g^(-1) at 0.1,0.2,0.5,and 1 C,respectively.Furthermore,the DLScE demonstrates remarkable stability with lithium metal batteries,facilitating the stable operation of a Li/Li symmetric battery for over 200 h at both 0.1 and 0.2 mA-cm^(-2).Notably,the formation of lithium dendrites is also effectively inhibited during cycling.This work provides a novel design strategy and preparation method for solid composite electrolytes. 展开更多
关键词 electrochemicalreliability lithium metal battery lithium-ion transference number double-layer solid composite electrolyte
原文传递
Selection of Negative Charged Acidic Polar Additives to Regulate Electric Double Layer for Stable Zinc Ion Battery
16
作者 Xing Fan Lina Chen +6 位作者 Yongjing Wang Xieyu Xu Xingxing Jiao Peng Zhou Yangyang Liu Zhongxiao Song Jiang Zhou 《Nano-Micro Letters》 SCIE EI CAS CSCD 2024年第12期342-356,共15页
Zinc-ion batteries are promising for large-scale electrochemical energy storage systems,which still suffer from interfacial issues,e.g.,hydrogen evolution side reaction(HER),self-corrosion,and uncontrollable dendritic... Zinc-ion batteries are promising for large-scale electrochemical energy storage systems,which still suffer from interfacial issues,e.g.,hydrogen evolution side reaction(HER),self-corrosion,and uncontrollable dendritic Zn electrodeposition.Although the regulation of electric double layer(EDL)has been verified for interfacial issues,the principle to select the additive as the regulator is still misted.Here,several typical amino acids with different characteristics were examined to reveal the interfacial behaviors in regulated EDL on the Zn anode.Negative charged acidic polarity(NCAP)has been unveiled as the guideline for selecting additive to reconstruct EDL with an inner zincophilic H_(2)O-poor layer and to replace H_(2)O molecules of hydrated Zn^(2+)with NCAP glutamate.Taking the synergistic effects of EDL regulation,the uncontrollable interface is significantly stabilized from the suppressed HER and anti-self-corrosion with uniform electrodeposition.Consequently,by adding NCAP glutamate,a high average Coulombic efficiency of 99.83%of Zn metal is achieved in Zn|Cu asymmetrical cell for over 2000 cycles,and NH4V4O10|Zn full cell exhibits a high-capacity retention of 82.1%after 3000 cycles at 2 A g^(-1).Recapitulating,the NCAP principle posted here can quicken the design of trailblazing electrolyte additives for aqueous Zn-based electrochemical energy storage systems. 展开更多
关键词 Aqueous Zn-ion batteries Zn metal anode Negative charged acidic polar additives Electric double-layer regulation
下载PDF
基于瞬变电磁阵列的地下金属定位系统设计
17
作者 康良伟 边瑞卿 +2 位作者 董浩森 张永杰 李凯 《传感器与微系统》 CSCD 北大核心 2024年第2期93-96,共4页
针对近地表不同形状金属目标定位的需求,设计了基于瞬变电磁(TEM)阵列技术的地下金属目标定位系统。该系统利用阵列传感器各接收线圈采集的感应电动势衰减曲线的差值,得到地下目标的信号响应特性,通过对比实测环境下标签信号的感应电动... 针对近地表不同形状金属目标定位的需求,设计了基于瞬变电磁(TEM)阵列技术的地下金属目标定位系统。该系统利用阵列传感器各接收线圈采集的感应电动势衰减曲线的差值,得到地下目标的信号响应特性,通过对比实测环境下标签信号的感应电动势幅值,可以得到目标的水平方位和垂直埋深,实现对地下金属目标的定位功能。实验结果表明:设计的系统能够区分球形、矩形和圆柱形目标的水平方位,垂直埋深测量误差在8%以下,可以实现较好的定位效果。 展开更多
关键词 瞬变电磁 阵列线圈结构 电压衰减曲线 金属目标定位
下载PDF
冶炼厂周边农用地土壤重金属非致癌健康风险评估及修正
18
作者 吴健芳 王红梅 《环境工程技术学报》 CAS CSCD 北大核心 2024年第1期112-120,共9页
为科学量化重金属复合暴露产生的非致癌健康风险,引入靶器官毒性剂量(TTD)模型和证据权重分析模型(WOE)对传统评估模型(HRA)的非致癌健康风险进行修正,并以华中某冶炼厂周边农用地土壤重金属为例,探究3种模型对非致癌健康风险评估结果... 为科学量化重金属复合暴露产生的非致癌健康风险,引入靶器官毒性剂量(TTD)模型和证据权重分析模型(WOE)对传统评估模型(HRA)的非致癌健康风险进行修正,并以华中某冶炼厂周边农用地土壤重金属为例,探究3种模型对非致癌健康风险评估结果的影响。结果表明:土壤重金属镉(Cd)、铅(Pb)、铬(Cr)和砷(As)的浓度均值分别为0.37、36.65、69.06和7.66mg/kg,其中Cd、Pb和Cr不同程度超出研究区土壤背景值,4种重金属传统非致癌健康风险值(HI_(HRA))为2.27×10^(-3)~3.35×10^(-1)。经TTD模型和WOE模型修正后4种重金属HI_(TTD)和HI_(WOE)分别为1.64×10^(-2)~5.50×10^(-1)和1.08×10^(-2)~6.09×10^(-1),其中HI_(TTD)、HI_(WOE)均值分别为HI_(HRA)均值的1.88倍和1.17倍。研究显示,对多种重金属复合污染的农用地开展人体非致癌健康风险评估时,需考虑多靶器官效应及重金属间的交互作用,避免传统风险评估方法低估或高估土壤污染对暴露人群产生的实际健康损害。 展开更多
关键词 土壤 重金属 健康风险 靶器官毒性剂量模型 证据权重模型
下载PDF
典型空间目标在非金属碎片超高速撞击下的易损性分析方法
19
作者 陈兴 卢永刚 《火箭军工程大学学报》 2024年第2期1-10,共10页
针对厘米/毫米级非金属碎片对典型空间目标的撞击风险评估,在基于AUTODYN有限元分析软件计算非金属碎片对3种典型结构的撞击毁伤特性基础上,结合毁伤树分析法建立了一种典型空间目标易损性分析方法,介绍了该易损性分析方法的总体思路和... 针对厘米/毫米级非金属碎片对典型空间目标的撞击风险评估,在基于AUTODYN有限元分析软件计算非金属碎片对3种典型结构的撞击毁伤特性基础上,结合毁伤树分析法建立了一种典型空间目标易损性分析方法,介绍了该易损性分析方法的总体思路和各项关键技术,获得了典型空间目标在非金属碎片撞击下导致不同毁伤等级的系统失效概率,并给出了典型空间目标的应用实例。结果表明:所提出的易损性分析方法可用于无人航天器在遭受厘米/毫米级空间非金属碎片撞击后的系统失效影响分析。 展开更多
关键词 空间目标 非金属碎片 易损性 风险评估
下载PDF
高纯溅射靶材回收研究现状
20
作者 仝连海 钟伟攀 李凤连 《中国有色冶金》 CAS 北大核心 2024年第1期61-67,共7页
高纯溅射靶材在晶圆代工企业和液晶面板企业作为耗材使用。高纯溅射靶材利用率低,一般平面靶利用率低于30%,旋转靶难超过70%,回收溅射后的残靶具有非常高的经济价值和环保意义。本文综述了贵金属、ITO、钛、钽、铝、铜等高纯靶材的回收... 高纯溅射靶材在晶圆代工企业和液晶面板企业作为耗材使用。高纯溅射靶材利用率低,一般平面靶利用率低于30%,旋转靶难超过70%,回收溅射后的残靶具有非常高的经济价值和环保意义。本文综述了贵金属、ITO、钛、钽、铝、铜等高纯靶材的回收研究现状,总结了靶材回收过程中面临的共同问题。目前在高纯靶材的残靶回收中还存在金属回收率低、回收的纯度不高、工艺流程长等问题需要攻克和改善,作者展望了开发较短的流程、环境友好的工艺、探索高价值的用途,是未来高纯残靶回收技术改进和发展的方向。 展开更多
关键词 溅射靶材 残靶回收 贵金属 氧化铟锡 高纯金属 芯片 显示器 集成电路
下载PDF
上一页 1 2 15 下一页 到第
使用帮助 返回顶部