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变谱法在红外热像仪测温中的应用 被引量:6
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作者 杨桢 张士成 杨立 《红外与激光工程》 EI CSCD 北大核心 2012年第6期1432-1437,共6页
为提高单波段红外热像仪测温的准确性,根据红外热像仪测温的原理和计算公式,提出了红外热像仪测温的变谱法。该方法通过在有限的波段内对发射率和反射率进行线性化处理,采取在不同的波段下测量的方法,从而构造不同的测温方程,然后通过... 为提高单波段红外热像仪测温的准确性,根据红外热像仪测温的原理和计算公式,提出了红外热像仪测温的变谱法。该方法通过在有限的波段内对发射率和反射率进行线性化处理,采取在不同的波段下测量的方法,从而构造不同的测温方程,然后通过求解方程组得到物体的表面温度。对于朗伯体材料的测温,需要构造3个测温方程进行求解;对于灰体材料的测温,可以通过在两个波段下进行测温,然后用建立的方程进行迭代求解。该方法可以通过在红外热像仪前加设滤光片和用不同波段的热像仪进行测量这两种方法来进行技术实现。仿真结果表明,该方法可以较准确地测量物体的表面温度,误差很小,可以在无需知道被测物体表面发射率的情况下得到物体的表面温度,从而减少了红外测温中由于发射率测量不准造成的误差。 展开更多
关键词 单波段红外热像仪 红外测温 发射率 变谱法
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线性变位极谱法研究——ⅩⅧ.叶酸的吸附波 被引量:5
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作者 陈乔 张祖训 《分析化学》 SCIE EI CAS CSCD 北大核心 1992年第4期440-442,共3页
本文用线性变位极谱法对B.R.缓冲溶液(pH6.5)中叶酸的吸附波进行了研究,证实它是一个2e-2H^+可逆反应,极谱波符合吸附可逆波方程式。测定了叶酸的扩散系数,并对电极反应机理进行了探讨。
关键词 线性位极 叶酸 吸附可逆波
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线性变位极谱法研究 ⅩⅢ.统一的配位吸附波理论 被引量:4
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作者 丁世家 谈亚珠 张祖训 《化学学报》 SCIE CAS CSCD 北大核心 1991年第4期400-405,共6页
本文讨论包括吸附、扩散、电极反应速率等多种因素同时发生作用时配位吸附波的理论,提出的统一方程式包括可逆、不可逆和准可逆过程常规示波极谱、一次导数和二次导数极谱波方程式.利用铅(Ⅱ)-8-羟基喹啉体系进行验证,理论与实验结果相符.
关键词 位极 线性 配位吸附波
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线性变位极谱法研究(Ⅸ)——CAEM过程配位吸附溶出可逆波理论 被引量:1
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作者 甘知行 宗慧民 张祖训 《高等学校化学学报》 SCIE EI CAS CSCD 北大核心 1989年第7期696-699,共4页
本文报遣CAEM过程配位吸附溶出可逆出理论,用铟(Ⅲ)-钢铁试剂-醋酸和醋酸钠缓冲体系进行验证,实验结果与理论相符。
关键词 线性位极 吸附溶出可逆波 铟(Ⅲ) 铜铁试剂 配合物 配位吸附
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气相色谱/质谱联用测定鞋用胶溶剂 被引量:4
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作者 柯宗枝 余雪林 +3 位作者 王世栋 谢星云 林兴 王志勇 《上海预防医学》 CAS 2004年第1期32-33,共2页
关键词 气相色/质联用 鞋用胶溶剂 职业危害 劳动卫生
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Analysis on Interaction between Genotype of Four Main Flavonoids of Barley Grain and Environment 被引量:1
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作者 杨涛 段承俐 +4 位作者 曾亚文 杜娟 杨树明 普晓英 杨生超 《Agricultural Science & Technology》 CAS 2012年第9期1843-1847,1903,共6页
[Objective] This study aimed to analyze the interaction between genotype of flavonoids of barley grain and environment, to increase the flavonoid content of barley grain in cultivation and breeding. [Method] In this s... [Objective] This study aimed to analyze the interaction between genotype of flavonoids of barley grain and environment, to increase the flavonoid content of barley grain in cultivation and breeding. [Method] In this study, the content of cate- chin, myricetin, quercetin and kaempferol of barley grain planted in Kunming, Qujing and Baoshan were determined by HPLC, and the genotype, environment, genotype- environment interaction of the flavonoid content of barley grain were analyzed. [Result] According to the experimental results, the genotype variance, environmental variance and G x E interaction variance of catechin and kaempferol contents show the same trend: genotype variation 〉 environmental variation 〉 G × E interaction variation, which all reach a extremely significant level; the genotype variance, envi- ronmental variance and G × E interaction variance of quercetin and total flavonoid contents show the same trend: genetype variation 〉 G × E interaction variation 〉 environmental variation, which all reach a extremely significant level; the genotype variance and environmental variance of myricetin content both reach a extremely sig- nificant level, while the G × E interaction variance reaches a significant level, showing an order of genotype variation 〉 environmental variation 〉 G × E interaction variation; the genotype variance, environmental variance and G x E interaction vari- ance of total flavonoid content show an order of genotype variation 〉 environmental variation 〉 G × E interaction variation. Among different barley varieties, Ziguang- mangluoerling and Kuanyingdamai in Qujing, Kunming and Baoshan have relatively high content of quercetin, while other barley varieties barely contain any quercetin. The grains of Ziguangmangluoerling and Kuanyingdamai are purple, while the grains of other barley varieties are yellow. [Conclusion] Four main flavonoids and the total flavonoids of barley grain are mainly under genetic control and affected by genetic- environment interactions; the purple barley grains contain high content of quercetin. 展开更多
关键词 BARLEY HPLC FLAVONOIDS Genotype-environment interaction
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Increase in functional groups for POSS by introducing branched phenylglycidylether 被引量:1
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作者 付强 胡立江 孙德智 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2004年第1期17-22,共6页
In the selected experimental conditions, firstly, the branched products with functional groups, N-(2-hydroxylpropylphenylether) (3-aminopropyl) triethoxysilane (APES-PGE, containing one hydroxyl group) and N-[di... In the selected experimental conditions, firstly, the branched products with functional groups, N-(2-hydroxylpropylphenylether) (3-aminopropyl) triethoxysilane (APES-PGE, containing one hydroxyl group) and N-[di(2-hydroxylpropylphenylether)](3-aminopropyl) triethoxysilane (APES-PGE2, containing two hydroxyl groups), were synthesized by reacting 1 mole of (3-aminopropyl)triethoxysilane (APES) with 2 mole of phenylglycidylether (PGE). Then the hydrolytic condensation of APES-PGE and APES-PGE2 was performed by dissolving 1 g of the corresponding silane in 1.5 ml tetrahydrofuran (THF), adding water and eventually a catalyst (molar ratios: [H2O]/Si=3, [NaOH]/Si=0.05), and heating at 50 ℃ for 24 h, allowing continuous evaporation of volatiles. The final products with branches containing hydroxyl groups were polyhedral oligomeric silsesquioxanes (POSS). The products from two reactions were characterized by standard spectroscopic techniques, gel partition chromatography (GPC), Fourier-transformed infrared spectroscopy (FTIR) and matrix-assisted ultraviolet laser desorption/ionization time-of-flight mass spectrometry (UV-MALDI-TOF MS). Additionally, a narrow mass distribution of multifunctionalized POSS was shown by UV-MALDI-TOF MS and assignments of the MS peaks. 展开更多
关键词 aminopropyl)triethoxysilane (APES) phenylglycidylether (PGE) Polyhedral oligomeric silsesquioxanes (POSS) matrix-assisted ultraviolet laser desorption/ionization time-of-flight mass spectrometry (UV-MALDI-TOF MS)
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An Exact Propagator for Solving the Triatomic Reactive Schrodinger Equation
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作者 李学明 孙志刚 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2017年第6期761-770,I0003,共11页
The exact short time propagator, in a form similar to the Crank-Nicholson method but in the spirit of spectrally transformed Hamiltonian, was proposed to solve the triatomic reactive time-dependent schrodinger equatio... The exact short time propagator, in a form similar to the Crank-Nicholson method but in the spirit of spectrally transformed Hamiltonian, was proposed to solve the triatomic reactive time-dependent schrodinger equation. This new propagator is exact and unconditionally convergent for calculating reactive scattering processes with large time step sizes. In order to improve the computational efficiency, the spectral difference method was applied. This resulted the Hamiltonian with elements confined in a narrow diagonal band. In contrast to our previous theoretical work, the discrete variable representation was applied and resulted in full Hamiltonian matrix. As examples, the collision energy-dependent probability of the triatomic H+H2 and O+O2 reaction are calculated. The numerical results demonstrate that this new propagator is numerically accurate and capable of propagating the wave packet with large time steps. However, the efficiency and accuracy of this new propagator strongly depend on the mathematical method for solving the involved linear equations and the choice of preconditioner. 展开更多
关键词 Time-dependent wavepacket method Spectral difference Spectrally transformed Hamiltonian Exact short time propagator Reactive scattering
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含中间共振态的三体末态探测效率的研究
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作者 高雅 吴臻泓 +4 位作者 钟翠 黄麟钦 李小华 张振华 郑波 《南华大学学报(自然科学版)》 2020年第2期16-20,共5页
多体末态过程通常包含的中间共振态直接影响到探测效率的确定。研究了采用二维不变质量谱加权的方法,用于计算多体末态过程的探测效率。对三体末态e+e-→π+π-η过程,考虑了e+e-→π+π-η,e+e-→ρη和e+e-→a±2π三个过程的贡献... 多体末态过程通常包含的中间共振态直接影响到探测效率的确定。研究了采用二维不变质量谱加权的方法,用于计算多体末态过程的探测效率。对三体末态e+e-→π+π-η过程,考虑了e+e-→π+π-η,e+e-→ρη和e+e-→a±2π三个过程的贡献,并利用二维不变质量谱加权法对该末态模拟数据样本的探测效率进行了估计。与直接加权的结果对比表明该方法能够快速且有效地确定探测效率。 展开更多
关键词 三体末态 二维不质量加权 探测效率计算 中间共振态
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Surface modification of ZrO_2 nanoparticles with styrene coupling agent and its effect on the corrosion behaviour of epoxy coating 被引量:13
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作者 赵霞 刘栓 +1 位作者 王秀通 侯保荣 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2014年第5期1163-1171,共9页
The surface of ZrO2 nanoparticles was modified by styrene coupling grafting method to improve the dispersion and interaction of the nanoparticles with the epoxy coating in which the modified ZrO2 nanoparticles were us... The surface of ZrO2 nanoparticles was modified by styrene coupling grafting method to improve the dispersion and interaction of the nanoparticles with the epoxy coating in which the modified ZrO2 nanoparticles were used as an additive. The grafting performance and microstructure of the nano- ZrO2/epoxy coating were analyzed by Fourier transformation infrared spectroscopy, X-ray diffraction, and scanning electron microscopy. The corrosion behavior of the nano-ZrO2/epoxy coating on mild steel was evaluated in neutral 3.5 wt% NaC1 solution using electrochemical impedance spectroscopy (EIS). Both the coating capacitance and coating resistance fitted by the equivalent circuit from EIS were used to evaluate the protective performance of the coating towards the mild steel. The results show a superior stability and efficient corrosion protection by the modified ZrO2 nanoparticles. The epoxy coating containing 2 wt% modified ZrO2 nanoparticles exhibited the best corrosion performance among all the coating specimens. This research may provide an insight into the protection of mild steel using modified epoxy coatings. 展开更多
关键词 Zr02 nanoparticles epoxy coating electrochemical impedance spectroscopy (EIS) corrosion behavior
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Power Spectral Analysis of Heart Rate Variability of Driver Fatigue 被引量:2
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作者 焦昆 李增勇 +1 位作者 陈铭 王成焘 《Journal of Donghua University(English Edition)》 EI CAS 2005年第1期11-15,共5页
This investigation was to evaluate the driving fatigue based on power spectral analysis of heart rate variability (HRV) under vertical vibration. Forty healthy male subjects (29.7±3.5 years) were randomly divided... This investigation was to evaluate the driving fatigue based on power spectral analysis of heart rate variability (HRV) under vertical vibration. Forty healthy male subjects (29.7±3.5 years) were randomly divided into two groups, Group A (28.8±4.3 years) and Group B (30.6±2.7 years). Group A (experiment group) was required to perform the simulated driving and Group B (control group) kept calm for 90 min. The frequency domain indices of HRV such as low frequency (0.04 0.15 Hz, LF), high frequency (0.150.4 Hz, HF), LF/HF together with the indices of hemodynamics such as blood pressure (BP) and heart rate (HR) of the subjects between both groups were calculated and analyzed after the simulated driving. There were significances of the former indices between both groups (P<0.05). All the data collected after experiment of Group A was observed the remarkable linear correlation (P<0.05) and parameters and errors of their linear regression equation were stated (α=0.05, P<0.001) in this paper, respectively. The present study investigated that sympathetic activity of the subjects enhanced after the simulated driving while parasympathetic activities decreased. The sympathovagal balance was also improved. As autonomic function indictors of HRV reflected fatigue level, quantitative evaluation of driving mental fatigue from physiological reaction could be possible. 展开更多
关键词 driving fatigue heart rate variability blood pressure heart rate VIBRATION correlation.
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TG–FTIR analysis of pyrolusite reduction by major biomass components 被引量:2
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作者 龙云飞 阮乐 +3 位作者 吕小艳 吕奕菊 苏静 文衍宣 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2015年第10期1691-1697,共7页
Pyrolusite reduction processes by three major biomass components cellulose,hemicelluloses and lignin,represented by CP,HP and LP,respectively,were investigated by thermogravimetric analyzer coupled with Fourier transf... Pyrolusite reduction processes by three major biomass components cellulose,hemicelluloses and lignin,represented by CP,HP and LP,respectively,were investigated by thermogravimetric analyzer coupled with Fourier transform infrared spectrometry(TG-FTIR).The Sestak-Berggren(SB) equation was used to evaluate the kinetics of reduction processes.TG analysis reveals that the main reduction processes occur at 250-410 ℃,220-390 ℃,and 190-410 ℃ for CP,HP,and LP,respectively.FT-IR and XRD results indicate that various reducing volatiles(e.g.aldehydes,furans,ketones and alcohols) are produced from the pyrolysis with the three major components,which directly reduce MnO_2 in ore to MnO.The processes are described by the SB equation with three parameters(m,n,p).Their non-zero values suggest that pyrolusite reduction is controlled by the diffusion of reducing gaseous products through an ash/inert layer associated with minerals.The apparent activation energies for pyrolusite reduction by CP,HP and LP are 40.48,25.70 and 40.10 kJ·mol^(-1),respectively. 展开更多
关键词 PYROLUSITE REDUCTION BIOMASS Component TG–FTIR
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DYT1 MUTATIONS AMONGST EARLY ONSET PRIMARY DYSTONIA PATIENTS IN CHINA 被引量:1
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作者 Jing-fang Yang Jian-yu Li +3 位作者 Yong-jie Li Tao Wu Yan-li Zhang Biao Chen 《Chinese Medical Sciences Journal》 CAS CSCD 2008年第1期38-43,共6页
Objective To investigate the frequency of GAG deletion in the DYT1 gene among early onset primary dystonia patients in China. Methods Thirteen patients with early onset primary torsion dystonia were screened for muta... Objective To investigate the frequency of GAG deletion in the DYT1 gene among early onset primary dystonia patients in China. Methods Thirteen patients with early onset primary torsion dystonia were screened for mutation in exon 5 of the DYT1 gene using denaturing high-performance liquid chromatography (DHPLC) and DNA sequencing, and the results were confirmed with polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). Results The GAG deletion mutation which results in Glu302del in exon 5 of the DYT1 gene was found in 5 patients. The detecting results were consistent between with DHPLC and PCR-RFLP. We did not find any other mutations in the DYT1 gene. Conel^iotm The GAG deletion in the DYT1 gene is common amongst early onset primary torsion dystonia patients in Chin& The frequency of DYT1 mutation is not significantly different between European and Asian patients with early onset primary dystonia. 展开更多
关键词 primary torsion dystonia DYT1 gene denaturing high-performance liquid chromatography
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Growth Kinetics of Silicon Carbide Film Prepared by Heating Polystyrene/Si(111)
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作者 Jian-wen Wang Yu-xia Wang +1 位作者 Zheng Chen You-ming Zou 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2009年第1期102-106,共5页
SiC films were prepared by heating polystyrene/Si(111) in normal pressure argon atmosphere at different temperatures. The films were investigated by X-ray diffraction, scanning electron microscopy, X-ray photoelectr... SiC films were prepared by heating polystyrene/Si(111) in normal pressure argon atmosphere at different temperatures. The films were investigated by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy and Fourier transform infrared absorption measurements. The thicknesses of SiC films were calculated from FTIR spectra. The growth kinetics of the growth process of SiC films were investigated as well. The thicknesses of the SiC films grown for 1 h with increasing growth temperatures have different trends in the three temperature ranges: increasing slowly (1200-1250 ℃), increasing quickly (1250- 12.70 ℃), and decreasing (1270-1300 ℃). The apparent activation energies of the growth process of SiC films in the three ranges were calculated to be 122.5,522.5, and -127.5 J/mol respectively. Mechanisms of the different growth processes were discussed. The relation between film thicknesses and growth temperatures indicated that the growth process was a 2D mechanism in the first range and 3D mechanism in the second range. In the third range, the thicknesses of SiC films were decreased by the volatility of Si and C atoms. 展开更多
关键词 Thin films Silicon carbide Fourier transform infrared absorption Growth kinetics
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Pyrolysis Characteristics and Kinetics of the Preparation Process of Sludge-Based Activated Carbon by ZnCl_2 Activation Method 被引量:2
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作者 Xin Li Guang-Zhi Wang +1 位作者 Wei-Guang Li Ping Wang 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2013年第6期29-36,共8页
To obtain the pyrolysis characteristics and kinetics of preparation process of sludge-based activated carbon by ZnCl2 activation method (i.e.the pyrolysis process of the sludge with ZnCl2 activation),the characteris... To obtain the pyrolysis characteristics and kinetics of preparation process of sludge-based activated carbon by ZnCl2 activation method (i.e.the pyrolysis process of the sludge with ZnCl2 activation),the characteristic of mass loss and gas products generated during pyrolysis of the sludge with ZnCl2 activation were analyzed by thermogravimetric analysis coupled with Fourier Transform Infrared Spectroscopy (TG-FTIR).The kinetic parameters were calculated by the Coats-Redfem method and the mechanism models were established.The role of ZnCl2 in the pyrolysis process of the sludge with ZnCl2 activation was also illustrated through the comparison of the pyrolysis characteristics and kinetics of the sludge with and without ZnCl2 activation.The results showed that the pyrolysis process of the sludge with ZnCl2 activation can be divided into four stages including the dehydration of sludge and initial depolymerization of a small portion of organics matters,the decomposition of large molecular organic matters into small molecular intermediates,the further degradation of intermediates and volatilization of ZnCl2,and the decomposition of inorganic minerals and undecomposed organic matters.CO2,CO,CH4,H2O,some aldehydes and carboxylic acids are the major pyrolysis gaseous products.The activation energies and pre-exponential factors are in the range of 28.84-206.42 kJ/mol and 9885.16-8.08× 1011 min-1,respectively.During the pyrolysis of sludge,ZnC12 not only can function as a dehydration agent and inhibit the formation of tar,but also can peptize the organic matters in the sludge,making them easier to be decomposed. 展开更多
关键词 SLUDGE ZNCL2 ACTIVATION pyrolysisCLC number:X705 Document code:AArticle ID:1005-9113(2013)06-0029-08
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Curing Mechanism of Condensed Polynuclear Aromatic Resin and Thermal Stability of Cured Resin 被引量:1
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作者 Li Shibin Sun Qiqian +2 位作者 Wang Yuwei Wu Mingbo Zhang Zailong 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2015年第2期9-16,共8页
In order to improve the thermal stability of condensed polynuclear aromatic(COPNA) resin synthesized from vacuum residue, 1,4-benzenedimethanol was added to cure COPNA resin. The curing mechanism was investigated by p... In order to improve the thermal stability of condensed polynuclear aromatic(COPNA) resin synthesized from vacuum residue, 1,4-benzenedimethanol was added to cure COPNA resin. The curing mechanism was investigated by proton nuclear magnetic resonance spectrometry, solid carbon-13 nuclear magnetic resonance spectrometry and Fourier transform infrared spectroscopy. Microstructures of the uncured and the cured COPNA resins were studied by scanning electron microscopy and X-ray diffractometry. The thermal stability of COPNA resins before and after curing was tested by thermogravimetric analysis. The element composition of the cured COPNA resin heated at different temperatures was analyzed by an element analyzer. The results showed that the uncured COPNA resin reacted with the cross-linking agent during the curing process, and the curing mechanism was confirmed to be the electrophilic substitution reaction. Compared with the uncured COPNA resin, the cured COPNA resin had a smooth surface, well-ordered and streamlined sheet structure with more crystalline solids, better molecular arrangement and orientation. The weight loss process of the uncured and cured COPNA resins was divided into three stages. Carbon residue of the cured COPNA resin was 41.65% at 600 ℃, which was much higher than 25.02% of the uncured COPNA resin, which indicated that the cured COPNA resin had higher thermal stability. 展开更多
关键词 condensed polynuclear aromatic resin SYNTHESIS vacuum residue CURING thermal stability
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Carbon monoxide adsorptive capability of low rank coal's maceral
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作者 王月红 郭立稳 张九零 《Journal of Coal Science & Engineering(China)》 2008年第4期678-682,共5页
The centrifugal separation with gravity experiment was made for getting every pure macerals like inertinite and vitrinite,and the isothermal adsorption tests of pure mac- eral are carried out at 30,40,50,55,60,65℃,re... The centrifugal separation with gravity experiment was made for getting every pure macerals like inertinite and vitrinite,and the isothermal adsorption tests of pure mac- eral are carried out at 30,40,50,55,60,65℃,respectively,after analyzing the proximate element and maceral of coal samples,which was aimed to study the CO adsorptive capa- bility of every maceral of low rank coal at difference temperature and pressure.The results show that the adsorption isotherm of CO can be described by Langmuir equation because it belongs to the Type I adsorption isotherm at low temperature(T≤50℃),and the tem- perature effect on coal adsorption is greater than of pressure in lower temperature and pressure area;what's more,the relationship is linear between the coal adsorption quantity of CO and the pressure at high temperature(T>50℃),it can be described by Henry equation(Q=KP),which increases with pressure.Both temperature and pressure has great influence on CO adsorptive capability of low rank coals,especially the temperature's effect is so very complex that the mechanism need to study further.At the same time,the volatile matter,inertinite,oxygen-function groups and negative functional groups are high popu- larly in low rank coal samples,especially,the content of hydroxide(-OH) has great influ- ence on CO adsorption in that the inertinite has stronger effect than vitrinite on adsorptive capability of low rank coal samples,the result is same to the research on CH4 adsorption. 展开更多
关键词 low rank coal CO MACERAL adsorption isotherm spontaneous combustion
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Adsorption of Chromium (VI) onto Activated Carbon Modified with KMnO4
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作者 Meiling Pang Bing Liu +1 位作者 Naoki Kano Hiroshi Imaizumi 《Journal of Chemistry and Chemical Engineering》 2015年第4期280-287,共8页
The adsorption capacity of activated carbon modified with KMnO4 (potassium permanganate) for Cr(VI) from aqueous solution was investigated. The modified activated carbon was characterized by SEM (scanning electro... The adsorption capacity of activated carbon modified with KMnO4 (potassium permanganate) for Cr(VI) from aqueous solution was investigated. The modified activated carbon was characterized by SEM (scanning electron microscopy), FT-IR (Fourier transform infrared spectrometer), and N2 adsorption/desorption tests. Adsorption of Cr(VI) from aqueous solution onto the activated carbon was investigated in a batch system. In the present study, the effect of various parameters such as pH, contact time and initial concentration on the adsorption capacity were determined by ICP-AES (inductively coupled plasma atomic emission spectrometry). The Cr(VI) adsorption on the activated carbon conforms to the Langmuir and Freundlich isothermal adsorption equation. The rates of adsorption were found to conform to pseudo-second order kinetic. The modified activated carbon can be an effective adsorbent for Cr(VI) from the aqueous solution. 展开更多
关键词 Modified activated carbon CHROMIUM adsorption isotherms kinetics.
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Low-temperature phase transitions of sodium aluminate solutions 被引量:5
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作者 Wei LIU Zhou-lan YIN Zhi-ying DING 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2019年第1期194-199,共6页
A series of low-temperature phase transitions of sodium aluminate solutions were studied by differential scanning calorimetry (DSC) and Raman spectroscopy. The results indicate that NaOH concentration is a primary imp... A series of low-temperature phase transitions of sodium aluminate solutions were studied by differential scanning calorimetry (DSC) and Raman spectroscopy. The results indicate that NaOH concentration is a primary impact factor for the binary eutectic point and ice melting temperature of sodium aluminate solutions with low NaOH concentration. In addition, the phase transition process of sodium aluminate solutions with low NaOH concentration from 123.15 to 283.15 K is divided into four steps: non-crystal to crystal, ternary eutectic reaction, binary eutectic reaction and ice melt. The projection phase diagram of NaOH-Al(OH)3-H2O system at low temperature was plotted, in which the ternary eutectic temperature for sodium aluminate solutions is 183.15 K. 展开更多
关键词 sodium aluminate solution low-temperature phase transition differential scanning calorimetry Raman spectroscopy eutectic reaction
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The SVD of the EMG basis on the FFT of the Kaiser window 被引量:3
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作者 吕广明 车仁炜 +1 位作者 唐余勇 盛培军 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2005年第3期275-277,共3页
The EMG signal is a present field of research which is a driving force in sources of rehabilitating robots. The FFT with Kaiser Window was used in this paper to analyze the spectral characteristics of the EMG signal a... The EMG signal is a present field of research which is a driving force in sources of rehabilitating robots. The FFT with Kaiser Window was used in this paper to analyze the spectral characteristics of the EMG signal according to the characteristic of time changing and nonlinearity for the EMG signal and good results have been obtained. The singular value expressing the property of every EMG signal at each channel was taken out. It offered important data for the actual control of rehabilitating robots. 展开更多
关键词 EMG signal spectrum analysis FFT with Kaiser SVD
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