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    题名 作者 年代 出处 被引量
1基于CAP方法的震源机制研究显示文摘利用来源于湖北区域台网共6个台的宽频带数字地震记录,采用CAP法(Cut and Paste Method)反演了2008年11月22日湖北-秭归Ms4.1级地震和09月27日Ms3.2中小震的震源机制解。结果显示,2次地震的震源机制解有一些差别,但是均为逆冲兼走滑分量性质断层,主压应力P轴主要集中在NE向,与区域主压应力方向有一定一致性。分析认为秭归地震可能是仙女山断裂受库水渗透和载荷变化影响引发的水库构造地震。通过与P波初动地震震源机制结果对比发现,该地震的震源机制的反演结果有较好的一致性,结果较可信。赵凌云 邓津 陈俊华 申学林 戴苗 魏贵春 2010长江科学院院报2010,27,5:21
2基于CAP方法的2013湖北巴东5.1级地震震源机制与发震构造研究显示文摘利用湖北与重庆区域台网共9个台的宽频带数字地震记录,采用CAP法(Cut and Paste Method)反演了湖北巴东2013年12月16日MS5.1地震震源机制解,其最佳双力偶解为节面I:走向166°,倾角82°,滑动角41°;节面Ⅱ:走向69°,倾角49°,滑动角169°;最佳震源深度主要集中分布在5.5km附近。分析认为此次地震的发震断层为带有逆冲成分的走滑性质断层,主压应力P轴近EW向,主张应力轴近NS向。余震序列主要呈EW分布,少部分呈NS方向分布,较大余震的发震破裂滑动类型以正走滑型的居多,其次为逆倾滑型及逆走滑型。结合7次较大余震的机制解判断,近EW向节面为发震断层。赵凌云 张辉 陈俊华 申学林 魏贵春 2014地震工程学报2014,36,4:13
3An analytical solution for evaluating the safety of an exposed face in a paste backfill stope incorporating the arching phenomenon显示文摘In current underground mining, the stability of the exposed backfill face is a basic issue associated with mining design and has been the subject of considerable research in mining safety and efficiency. In this study, an improved analytical solution for evaluating the safety of vertically exposed faces in backfilling was proposed. Based on a differential slice method, the proposed solution emphasizes the arching effect as having the advantages of more rigor and wider scalability. Feasibility of the proposed solution was validated with classic centrifuge results. Good agreement between compared results indicated that the proposed solution skillfully predicts the behavior of the paste centrifuge model. Additionally, calculation of exposed face safety in sequential filling was presented. The proposed solution has practical significance in mine backfill design.Xu Zhao Andy Fourie Chong-chong Qi 2019International Journal of Minerals,Metallurgy and Materials2019,26,10:10
4Low-cost,μm-thick,tape-free electronic tattoo sensors with minimized motion and sweat artifacts显示文摘Electronic tattoos(e-tattoos),also known as epidermal electronics,are ultra-thin and ultra-soft noninvasive but skin-conformable devices with capabilities including physiological sensing and transdermal stimulation and therapeutics.The fabrication of e-tattoos out of conventional inorganic electronic materials used to be tedious and expensive.Recently developed cut-and-paste method has significantly simplified the process and lowered the cost.However,existing cut-and-paste method entails a medical tape on which the electronic tattoo sensors should be pasted,which increases tattoo thickness and degrades its breathability.To address this problem,here we report a slightly modified cut-and-paste method to fabricate low-cost,open-mesh e-tattoos with a total thickness of just 1.5μm.E-tattoos of such thinness can be directly pasted on human skin and conforms to natural skin texture.We demonstrate that this ultra-thin,tape-free e-tattoo can confidently measure electrocardiogram(ECG),skin temperature,and skin hydration.Heart rate and even respiratory rate can be extracted from the ECG signals.A special advantage of such ultra-thin e-tattoo is that it is capable of high-fidelity sensing with minimized motion artifacts under various body movements.Effects of perspiration are found to be insignificant due to the breathability of such e-tattoos.Youhua Wang Yitao Qiu Shideh Kabiri Ameri Hongwoo Jang Zhaohe Dai YongAn Huang Nanshu Lu 2018npj Flexible Electronics2018,2,1:9
5Mechanical Properties and Microstructure of CaSO4 Whisker Reinforced Cement Mortar显示文摘Calcium sulfate whisker(CaSO4 whiskers), a new type of microfiber material, was used in cement matrix to increase the strength of the cement based composites. Effect of CaSO4 whiskers on the mechanical properties of the resulting cement mortar was also studied. The results showed that the flexural strength and compressive strength of the mortar specimen was improved as high as 28.3% and 8.5% by incorporating 5 wt% CaSO4 whiskers. Also, the chemical composition and structural transformation of the hardened cement matrix with CaSO4 whiskers were identified by X-ray diffraction(XRD) and scanning electron microscope(SEM). Conclusion can be drawn that CaSO4 whiskers can effectively retard the formation and restrict the coalescence of micro-crack expansion. The interaction mechanism of CaSO4 whisker on the reinforcement is mainly on three aspects: whisker pullout, crack deflection, and crack bridging. Mercury intrusion porosimetry(MIP) tests have confirmed that for 28 d cement mortar, the harmless pores increased from 9.33% to 10.62%, and the harmful pores decreased from 2.08% to 1.90%. Therefore, the whisker can optimize the pore size distribution of the resulting cement mortar.万连建 潘锐之 XU Jun 2019Journal of Wuhan University of Technology(Materials Science)2019,34,5:4
6传统肥皂的洗涤机理显示文摘1.概述通常,皂化的油脂都可以制作肥皂。最终制作出的肥皂的性质基于选用的油脂的种类。传统肥皂由甘油三酯钠盐或甘油三酯钾盐和脂肪酸组成。原料油脂主要有牛油、椰子油和棕榈仁油,也可加入少量的其他油脂如葡萄籽油、甜杏仁油、米糠油等。肥皂品种繁多,包括透明皂、不透明皂和半透明皂,还有些特殊基质的肥皂如皂片(shaving)、块状不透明皂(nonmarring opaque)、皂膏/糊(cream/paste)和皂粉。Edmund D.George David J.Raymond 石露伊 刘伟毅 2015中国洗涤用品工业2015,,4:4
7用对氨基苯酚改性的碳纳米管糊电极同时测定羟胺和苯酚(英文)显示文摘A carbon paste electrode that was chemically modified with multiwall carbon nanotubes and p-aminophenol was used as a selective electrochemical sensor for the simultaneous detection of hydroxylamine (HX) and phenol. Cyclic voltammetry, double potential-step chronoamperometry, square wave voltammetry (SWV), and electrochemical impedance spectroscopy were used to investigate the use of p-aminophenol in the carbon nanotubes paste matrixes as a mediator for the electrocatalytic oxidation of HX and phenol in aqueous solution. The coefficient of electron transfer and catalytic reaction rate constant were determined using the electrochemical methods. Under optimized conditions, the electrocatalytic oxidation current peaks for HX and phenol increased linearly with concentration in the range of 0.5-180.0 and 10.0-650.0 μmol/L for HX and phenol, respectively. The detection limits for HX and phenol were 0.15 and 7.1 μmol/L, respectively. The anodic potential peaks of HX and phenol were separated by 0.65 V in SWV. Because of good selectivity and sensitivity, the present method provides a simple method for the selective detection of HX and phenol in practical samples such as water samples.Ali A. Ensafi E. Heydari-Bafrooei B. Rezaei 2013催化学报2013,34,9:3
8Electrochemical Study on FXL-I4 Collecting Wolframite without Pb^(2+) Flotation显示文摘In this paper,FXL-14 (tetradecyl iminobimetyl phosphonic acid) as a collector for floating wolframite without Pb2+ and itsadsorption mechanism were studied by electrochemical method.Flotation experiment results showed that in the wide range of pHvalue activation of FXL-14 collecting wolframite with Pb2+ was not needed.Wolframite—carbon paste electrode andsmall-amplitude triangular potential sweep were used to measure the electro-double-layer capacitance of wolframite in theFXL-14 solution (with and without of the presence of 1×10-4MPb2+).It is showed that in spite of concentration of Pb2+ in theflotation processing,with FXL-14 (800mg/l) the electro-double-layer capacitance was bigger than with FXL-14 (800mg/l)and Pb2+.Zhu Yimin Xiao Youming Hunan Non-ferrous Metal Research Institute 1989Rare Metals1989,9,4:3
9以3,4-二羟基肉桂酸为介质的多壁碳纳米管糊电极用于检测药物和尿液样品中的谷胱甘肽(英文)显示文摘A sensitive and selective electrochemical sensor for the determination of glutathione(GSH) was developed using a modified multiwall carbon nanotube paste electrode with 3,4 dihydroxy cinnamic acid as a mediator.This modified electrode showed very high electrocatalytic activity for the anodic oxidation of GSH.Under the optimized conditions,the electrocatalytic peak current showed a linear relationship with GSH concentration in the range of 0.5-400.0 μmol/L with a detection limit of 0.1 μmol/L GSH.The relative standard deviations for seven successive assays of 5.0 and 25.0 μmol/L GSH were 2.2% and 2.7%,respectively.The modified electrode was used for the determination of GSH compounds in real urine samples.Mohsen Keyvanfard Hassan Karimi-Maleh Khadijeh Alizad 2013催化学报2013,34,10:3
10新一代天气雷达资料下载与共享显示文摘就山东省气象局自行开发的主站宽带雷达资料下行传输程序做了详细的介绍,并给出了下载程序源代码。对省级雷达资料应用服务器的组建做了简单的介绍。李凯 罗慧敏 顾谦 2006气象2006,32,9:3
11假的显示文摘《假的》(Paste)这个短篇小说是许多选家常选入英美短篇小说集的一篇佳作。情节虽然简单,但在选择细节方面则体现了作者的匠心,他力求言之有物,但从不直接明说,而随时给读者以必要的暗示,使读者能窥察到人物的内心活动。这个短篇小说在隐晦与隽永之中却又显得文笔简练,作者在小说的艺术方面造诣是很深的。亨·詹姆斯 雨宁 1985世界文学1985,,1:2
12Dispersion of Co-poly Carboxylate Superplasticizer Containing Poiyether Side Chain显示文摘Free radical co-polymerization was employed to synthesize co-poly carboxylate (PC) superplasticizers with different amount of carboxyl and methyl polyethylene glycol (MPEG) side chain.Dispersion ability and retention of PC were compared with one another. The results show that increase of side chain is advantageous to dispersion, but it decreases when amount of MPEG is beyond a certain value which is different with the proportion of carboxyl. If the amount of carboxyl increases, the influence of side chain in copolymer on dispersion diminishes. Polyether side chain is advantageous to retention. And the author explained the mechanism of PC using the theory of steric repulsive force.左彦峰 王栋民 2006Journal of Wuhan University of Technology(Materials Science)2006,21,z1:2
13Effects of Curing Temperature on Rheological Behaviour and Compressive Strength of Cement Containing GGBFS显示文摘The viscoplasticity and compressive strength of cement with high erosion performance were studied. The influences of curing temperature and content of ground granulated blast furnace slag(GGBFS) on these performances of the medium heat cement(including high iron and low calcium phase) were also investigated. The results indicate that the medium heat cement with high iron phase can maintain better fluidity and low temperature sensitivity than that of ordinary Portland cement at high temperature. GGBFS can play an important role in improving the fluidity and stability of the slurry, and avoid the cement setting and hardening prematurely at high temperatures. The microstructure analysis shows that a large amount of CH with layer shape appear in the slurry. The amount of this gel layer in the slurry increased as the curing temperature elevated. The layer can make the cement stone structure more denser, so that the compressive strength of samples are enhanced in the later stage. When the medium heat cement contains 40% GGBFS, the system has the best flow performance and stability under high temperature environment, and can be applied to mass concrete with excessive internal temperature.陈平 ZHANG Shuming 杨华美 HU Cheng 2019Journal of Wuhan University of Technology(Materials Science)2019,34,5:2
14A novel ZnO/reduced graphene oxide and Prussian blue modified carbon paste electrode for the sensitive determination of Rutin显示文摘A carbon paste modified sensor based on a novel composite of zinc oxide nanoparticles deposited on reduced graphene oxide(ZnO-rGrO) and Prussian blue(PB) was drop-cast(ZnO-rGrO-PB/MCPE) for the sensitive estimation of Rutin(Rtn) at pH 7.0.The high surface area of ZnO-rGrO and electrocatalytic property of PB promotes the oxidation of Rtn. Field emission scanning electron microscope(FE-SEM) and energy-dispersive X-ray spectroscopy(EDX) techniques were employed to confirm the deposition of ZnO-rGrO and PB on carbon paste electrode(CPE). The ability of ZnO-rGrO-PB/MCPE in charge transfer at the interface was investigated using electrochemical impedance spectroscopy(EIS). The heterogeneous rate constant(ks) and the charge transfer coefficient(α) have been calculated as 6.08 s^(-1) and 0.74 respectively. This sensor showed a wide linear response for Rtn from 7.0×10^(-8)to 7.0×10^(-6) M and 7.0×10^(-6) to 1.0×10^(-4) M with a limit of detection(2.05±0.04)×10^(-8) M(S/N=3). The application of ZnO-rGrO-PB/MCPE was found in the analysis of Rtn in fruit juice samples using standard addition method. This sensor showed good reproducibility, stability, selectivity and sensitivity.Ozma J D'Souza Ronald J Mascarenhas Ashis K Satpati Basavanakote M Basavaraja 2019Science China Chemistry2019,62,2:2
15Drying of pasty and granular materials in mechanically and conventional spouted beds显示文摘A contactor vessel was built to operate as either a mechanically or a conventional spouted bed for the purpose of analyzing the drying of pasty and granular materials under comparable conditions in both configurations. A classical conical–cylindrical spouted bed with a 60° conical base and an air inlet central orifice was modified to enable the switch by introducing in the vessel’s center an open helicoidal conveyor screw placed above the air inlet orifice. This screw is removable and conveniently returns the bed to its conventional spouted configuration. Experiments on drying solutions (calcium carbonate suspensions and skimmed milk) and granular materials (porous alumina particles) were performed for various bed parameter settings. The spouting pressure drop, outlet air temperature, and relative humidity were measured over time under different conditions. Mechanical agitation is proved effective in drying diluted carbonate calcium liquid suspensions and coarse porous alumina particles at an air velocity approximately 50% lower in comparison to drying in a conventional spouted bed. The conventional spouted bed performed better at drying liquid skimmed milk as the mechanical agitation combined with the axial inlet air flow is not effective in mitigating sticking and powder agglomeration in the bed when handling pastes of complex composition. Introducing mechanical agitation in the designed setup broadens the operating range of a conventional spouted bed with axial air flow in the inlet.Robson C. Sousa Maria C. Ferreira Haritz Altzibar Fábio B. Freire José T. Freire 2019Particuology2019,17,1:1
16A multiphysics-viscoplastic cap model for simulating blast response of cemented tailings backfill显示文摘Although a large number of previous researches have significantly contributed to the understanding of the quasi-static mechanical behavior of cemented tailings backfill,an evolutive porous medium used in underground mine cavities,very few efforts have been made to improve the knowledge on its response under sudden dynamic loading during the curing process.In fact,there is a great need for such information given that cemented backfill structures are often subjected to blast loadings due to mine exploitations.In this study,a coupled thermo-hydro-mechanical-chemical(THMC)-viscoplastic cap model is developed to describe the behavior of cementing mine backfill material under blast loading.A THMC model for cemented backfill is adopted to evaluate its behavior and evolution of its properties in curing processes with coupled thermal,hydraulic,mechanical and chemical factors.Then,the model is coupled to a Perzyna type of viscoplastic model with a modified smooth surface cap envelope and a variable bulk modulus,in order to reasonably capture the nonlinear and rate-dependent behaviors of the cemented tailings backfill under blast loading.All of the parameters required for the variable-modulus viscoplastic cap model were obtained by applying the THMC model to reproducing evolution of cemented paste backfill(CPB)properties in the curing process.Thus,the behavior of hydrating cemented backfill under high-rate impacts can be evaluated under any curing time of concern.The validation results of the proposed model indicate a good agreement between the experimental and the simulated results.The authors believe that the proposed model will contribute to a better understanding of the performance of hydrating cemented backfill under blasting,and also to practical risk management of backfill structures associated with such a dynamic condition.Gongda Lu Mamadou Fall Liang Cui 2017Journal of Rock Mechanics and Geotechnical Engineering2017,9,3:1
17Antioxidant high-conductivity copper paste for low-cost flexible printed electronics显示文摘The flexible printed electronics(e.g.,wearable devices,roll-up displays,heating circuits,radio frequency identification(RFID)tags)calls for high-conductivity and low-cost materials,particularly for copper pastes.It is still a big challenge to develop reliable copper pastes for both antioxidant and high-conductivity flexible printed films and lines.In this work,an antioxidant copper paste was achieved using copper microflakes with surface passivation by formate ions and thiols,with high conductivity of 13400 S cm^(−1)(the same order of magnitude of silver pastes,1.8-2.5×10^(4) S cm^(−1)).The universal applications of as-prepared copper paste in flexible printed electronics(e.g.,electromagnetic interference(EMI)shielding films,anti-fog films,and RFID tags)via screen printing and curing at 170℃ under ambient atmosphere were demonstrated.The as-printed electronics showed high performance in flexibility,stability,and reliability.This work shows the great potential of anti-oxidation copper pastes in low-cost flexible printed electronics for commercial usage.Shuqing Hong Chimin Liu Shuqiang Hao Wenxing Fu Jian Peng Binghui Wu Nanfeng Zheng 2022npj Flexible Electronics2022,6,1:1
18基于纳米结构的电化学传感器用于伏安法测定苄丝肼、尿酸和叶酸(英文)显示文摘A carbon paste electrode modified with carbon nanotubes and ferrocene was fabricated.An electrochemical study of the modified electrode and an investigation into its efficiency for the electrocatalytic oxidation of benserazide,uric acid and folic acid were undertaken.The electrode was also used to study the electrocatalytic oxidation of benserazide using cyclic voltammetry,chronoamperometry,and square wave voltammetry(SWV).We found that the oxidation of benserazide at the surface of the modified electrode occurs at a potential about 285 mV lower than that of unmodified carbon paste electrode.SWV gave a linear dynamic range from 8.0×10-7 to 7.0×10 4 mol/L.The detection limit was 1.0×10-7 mol/L for benserazide.This modified electrode was used for the determination of benserazide,uric acid,and folic acid in an urine sample.Sakineh Esfandiari Baghbamidi Hadi Beitollahi Seyed Zia Mohammadi Somayeh Tajik Somayeh Soltani-Nejad Vahhab Soltani-Nejad 2013催化学报2013,34,10:1
19An investigation into the properties of ternary and binary cement pastes containing glass powder显示文摘The properties of binary and ternary cement pastes containing glass powder (GP) were examined.Hydration at early age was evaluated using semi-adiabatic calorimetry and at late ages using non-evaporable water content and thermogravimetric analysis.The transport characteristic was assessed by measuring electrical resistivity.The binary paste with slag showed the highest hydration activity compared to the binary pastes with GP and fly ash (FA).The results indicated that the pozzolanic behavior of the binary paste with GP was less than that of the binary pastes with slag or FA at late ages.An increase in the electrical resistivity and compressive strength of the binary paste with GP compared to other modified pastes at late ages was observed.It was shown that GP tends to increase the drying shrinkage of the pastes.Temary pastes containing GP did not exhibit synergistic enhancements compared to the respective binary pastes.Marcelo Frota BAZHUNI Mahsa KAMALI Ali GHAHREMANINEZHAD 2019Frontiers of Structural and Civil Engineering2019,13,3:1
20Study on the adsorptive catalytic voltammetry of aloe-emodin at a carbon paste electrode显示文摘A new catalytic voltammetric method for the determination of anthraqunone medi-cines at a carbon paste electrode (CPE) was described for the first time. The mechanism of the catalytic reaction was investigated by using linear sweep voltammetry, cyclic voltammetry, con-stant potential electrolysis and so on. The experiment results indicate that aloe-emodin was effi-ciently accumulated at a CPE by adsorption. In the following potential scan, aloe-emodin was reduced to homologous anthrahydroquinone compound, then the compound was immediately oxidized to aloe-emodin by the dissolved oxygen, and the aloe-emodin was again reduced at the CPE. As a result, a cyclic catalytic reaction was established. But a reversible redox reaction of aloe-emodin can only be observed at a mercury electrode, no catalytic reaction occurs there. A sensitive catalytic voltammetric peak of aloe-emodin was obtained at about ?0.60 V (vs. SCE) in 0.56 mol/L NH3-NH4Cl buffer (pH 8.9). The proposed method was applied to the determination of aloe-emodin in the Radix Rhei with satisfactory results. The determination results were in good agreement with reference values obtained by the HPLC. The adsorptive catalytic voltammetry for the determination of organic compound at CPE, chemically modified electrode and other solid electrodes could be significant in the studies on pharmacology, pharmacodynamics, toxicity of medicine, clinical medicine and biochemistry.LI Ju'nan GAO Peng LI Xiangling YAN Zhihong MAO Xun 2005Science China Chemistry2005,48,5:1
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