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The synthesis of mono-6-thio-β-cyclodextrin capped CdTe QDs and its interaction with neutral red

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Science China Chemistry 2010年第6期53卷 1358-1365页

作者： wang Lei,LIU shaopu,PENG JuanJuan & HE YouQiu Key Laboratory on Luminescence and Realtime Analysis,Ministry of Education School of Chemistry and Chemical Engineering,Southwest University,Chongqing 400716,China Key Laboratory on Luminescence and Realtime Analysis Ministry of Education School of Chemistry and Chemical Engineering Southwest University Chongqing China

This paper presents a novel method for the synthesis of CdTe quantum dots (QDs) capped with β-cyclodextrin in aqueous solution using both TGA and mono-6-thio-β-CD as *** interaction between mono-6-thio-β-CD-CdTe QDs and neutral red (NR) was studied with fluorescence,UV-absorption and the resonance Rayleigh scattering *** its concentration was over 7.5 × 10-6 mol/L,the neutral red began to aggregate on the surface of the mono-6-thio-β-CD-CdTe QDs,which resulted in the mono-6-thio-β-CD-CdTe QDs particle size increasing,the sharply quenched fluorescence,and the marked increase of RRS intensity.

关键词： mono-6-thio-β-Cyclodextrin CdTe quantum dots thioglycolic acid neutral red

Periodic-phase-diagram similarity method for weak signal detection

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International Journal of Mechanical System Dynamics 2021年第2期1卷 248-255页

作者： Ruilan Tian Yangkun Zhang shaopu Yang Kai Yuan Qiang Xue Quanrong Ren State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures Shijiazhuang Tiedao UniversityShijiazhuangChina Department of Engineering Mechanics Shijiazhuang Tiedao UniversityShijiazhuangChina

The periodic-phase-diagram similarity method is proposed to identify the frequency of weak harmonic *** key technology is to find a set of optimal coefficients for Duffing system,which leads to the periodic motion under the influence of weak signal and strong *** the phase diagram similarity,the influences of strong noise on the similarity of periodic phase diagram are *** principle of highest similarity of periodic phase diagram with the same frequency is detected by discussing the persistence of similarity of periodic motion phase diagram under the strong noise and the periodic-phase-diagram similarity method is *** weak signals of early fault and strong noise are input into Duffing system to obtain the identified *** stochastic subharmonic Melnikov method is extended to obtain the conditions of the optimal coefficients for the identified *** on the results,the constructed frequency conversion harmonic weak signals are considered to form a datum periodic *** the change of frequency in the datum periodic system,the phase diagram similarity of the two constructed systems can be *** on the periodic-phase-diagram similarity method,the frequency of weak harmonic signals can be identified by the principle of highest similarity of periodic phase diagram with the same *** results of numerical simulation and the early fault diagnosis results of actual bearings verify the feasibility of the periodic-phase-diagram similarity *** accuracy of the detection effect is 97%,and the minimum signal-to-noise ratio is−80.71 dB.

关键词： periodic system signal-to-noise ratio stochastic subharmonic Melnikov method strong noise weak signal

A study on resonance Rayleigh scattering spectra of Humic Acid (HA)

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Chinese Journal Of Geochemistry 2012年第1期31卷 24-29页

作者： YU Deshun LIU shaopu ZHANG Lili ZHU Huiwu TIAN Yifu ZHANG Runyu YANG Jun College of Chemistry and Chemical Engineering Southwest UniversityChongqing 400716China State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550002China College of Chemistry and Material Science Guizhou Normal UniversityGuiyang 550001China

This paper deals with the influences of pH, acidity and ionic intensity of the solutions on the resonance Rayleigh scattering spectra and fluorescence spectra of humic acid. When the pH value is low and the acidity and ionic intensity are high, the resonance Rayleigh spectra and fluorescence spectra both show a tendency of increasing, though the former's intensity is much higher. In combination with the transmission electron microscope data, the factors leading to the occurrence and enhancement of the resonance Rayleigh scattering spectra of humic acid were explored. It is considered that particle enlargement caused by aggregation, the increase of heterogeneity, the increase of hydrophobility, the formation of interface, etc., are the factors leading to the occurrence and enhancement of the resonance Rayleigh scattering spectra of humic acid. As the intensity of the resonance Rayleigh scattering spectra of humic acid is much higher, resonance Rayleigh scattering spectroscopy can be used as a newly developed spectrum technology, which is more sensitive and simpler, to study humic acid and its complicated behaviors.

关键词：共振瑞利散射光谱腐殖酸离子强度 HA 荧光光谱透射电镜频谱技术 pH值

Simulation of Tert-Butyl Alcohol Forming Process by Slurry Catalytic Distillation with Custom Kinetic Program

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Advances in Chemical Engineering and Science 2016年第2期6卷 140-148页

作者： Zhenya Duan shaopu Li Lei wang Yuan Cheng Jingtao wang Junmei Zhang College of Electromechanical Engineering Qingdao University of Science and Technology Qingdao China College of Chemical Engineering Qingdao University of Science and Technology Qingdao China School of Chemical Engineering and Technology Tianjin University Tianjin China

Producing tert-butyl alcohol (TBA) by slurry catalytic distillation is a green new technology. In order to provide reference data for this production process, this paper applied advanced simulation software Aspen to simulate and optimize the slurry catalytic distillation process of producing TBA. And the kinetics equation of isobutylene hydration which is catalyzed by cation exchange resin in continuous stirred tank reactor (CSTR) is used to display the reaction process. Appropriate theoretical plate number of rectifying section, reaction section and stripping section, reflux ratio and liquid hold-up are obtained by the analog computation. Under this process condition, the conversion rate of isobutylene is 82.53%;the mole fraction of TBA in the bottom discharging is 82.5%.

关键词： Slurry Catalytic Distillation Hydration of Isobutylene Analog Computation

Free longitudinal vibrations of non-uniform rods

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Science China(Technological Sciences) 2011年第10期54卷 2735-2745页

作者： GUO ShuQi YANG shaopu Department of Engineering Mechanics Shijiazhuang Tiedao University Shijiazhuang 050043 China School of Mechanical Engineering Shijiazhuang Tiedao University Shijiazhuang 050043 China

Free longitudinal vibrations of non-uniform rods are investigated by a proposed method, which results in a series solution. In a special case, with the proposed method an exact solution with a concise form can be obtained, which imply four types of profiles with variation in geometry or material properties. However, the WKB (Wentzel-Kramers-Brillouin) method leads to a series solution, which is a Taylor expansion of the results of the proposed method. For the arbitrary non-uniform rods, the comparison indicates that the WKB method is simpler, but the convergent speed of the series solution resulting from the pro-posed method is faster than that of the WKB method, which is also validated numerically using an exact solution of a kind of non-uniform rods with Kummer functions.

关键词： longitudinal vibration non-uniform rod series solution WKB method

Highly Sensitive Spectrophotometric Determination of Trace Amounts of Uranium ( Ⅵ ) with Thiocyanate-Basic Xanthene Dye-Gum Arabic Systems

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Chemical Research in Chinese Universities 1991年第2期7卷 119-123页

作者： Liu Zhongfang and Liu shaopu (Department of Chemistry, South-West China Normal University, Chongqing)

Spectrophotometric determination of molybdenum, zinc, cobalt(Ⅱ), indium, selenium (Ⅳ), iron (Ⅲ), vanadium (Ⅴ), which is based on the ion-associate complexes formed by the reaction of metal ion-thiocyanate anionic ... 详细信息

关键词： Uranium Thiocyanate-basic xanthene dye-gum arabic systems

The interaction between furosemide-palladium (Ⅱ) chelate and basic triphenylmethane dyes by resonance Rayleigh scattering spectra and resonance non-linear scattering spectra and their analytical applications

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Science China Chemistry 2010年第8期53卷 1767-1777页

作者： LI CuiXia,LIU shaopu,LIU ZhongFang & HU XiaoLi Key Laboratory on Luminescence and Real-Time Analysis,Ministry of Education School of Chemistry and Chemical Engineering,Southwest University,Chongqing 400715,China Key Laboratory on Luminescence and Real-Time Analysis Ministry of Education School of Chemistry and Chemical Engineering Southwest University Chongqing China

In pH 4.5-7.0 Britton-Robinson buffer solution,furosemide (FUR) reacted with Pd (II) to form a 1:1 anionic *** chelate could further react with such basic triphenylmethane dyes (BTPMD) as ethyl violet (EV),crystal violet (CV),methyl violet (MV),methyl green (MeG) and brilliant green (BG) to form 1:1 ion-association *** not only resulted in the change of absorption spectra,but also led to the significant enhancement of resonance Rayleigh scattering (RRS),second-order scattering (SOS) and frequency doubling scattering (FDS).The maximum RRS wavelengths were located at 324 nm for the EV,CV and MV system,and 340 nm for the BG and MeG *** maximum SOS wavelengths were located at 550 nm for the EV,CV,BG and MeG system,and 530 nm for the MV *** maximum scattering peaks of all the systems were at 392 nm for *** enhanced RRS,SOS and FDS intensities were directly proportional to the concentration of *** detection limits for the different dye systems were 0.3-4.9 ng mL-1 for the RRS method,3.2-33.1 ng mL-1 for the SOS method and 9.0-85.7 ng mL-1 for the FDS *** methods could be used for the determination of trace amounts of *** effects of the formation of ternary ion-association complexes on the spectral characteristics and intensities of absorption,RRS,SOS and FDS have been *** optimum conditions of these reactions,the influencing factors and the analytical properties have been *** influences of coexisting substances were tested by RRS method and the results showed that this method exhibited a high *** on the aforementioned research,the highly sensitive,simple and rapid methods for the determination of trace amounts of FUR by resonance light scattering technique have been established,which could be applied to the determination of FUR in tablet,injection,human serum and urine *** composition and structure of the ternary ion-association complex and the reaction mechanism were discusse

关键词： furosemide basic triphenylmethane dyes palladium (Ⅱ) resonance Rayleigh scattering resonance non-linear scattering

含外圈故障的高速列车轴承转子系统非线性动力学行为分析

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机械工程学报 2018年第8期54卷 17-25页

作者：刘永强王宝森杨绍普石家庄铁道大学机械工程学院

针对高速动车组列车的轴箱轴承,建立一种含外圈故障的滚动轴承非线性动力学模型,并分析轴承在正常状态和故障状态下模型的非线性动力学行为。该轴承为高速列车圆锥滚子轴承,模型考虑了轴承间隙、滚子和滚道之间的非线性赫兹接触力、由... 详细信息

针对高速动车组列车的轴箱轴承,建立一种含外圈故障的滚动轴承非线性动力学模型,并分析轴承在正常状态和故障状态下模型的非线性动力学行为。该轴承为高速列车圆锥滚子轴承,模型考虑了轴承间隙、滚子和滚道之间的非线性赫兹接触力、由于转子质量偏心引起的不平衡力等因素。对模型进行数值求解,通过对比仿真和实际求得的变刚度频率外圈故障特征频率验证了模型的正确性。得到系统复杂的非线性动力学响应,分析转子速度、故障尺寸等因素对系统稳定性的影响,随着转子速度和故障尺寸的增大,系统会逐渐偏离稳定的运动状态,更早地进入混沌。通过频谱图、相平面图、分岔图以及Poincare映射图进行系统分岔和混沌特性分析,发现了通往混沌的拟周期运动、阵发性和倍周期分岔途径。分析结果对研究列车轴箱轴承故障的产生机理和演化规律具有一定的价值。

关键词：高速动车组轴箱轴承非线性动力学外圈故障

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典型快速谱峭图算法的研究及应用

振动与冲击 2016年第15期35卷 109-114页

作者：马新娜杨绍普石家庄铁道大学信息科学与技术学院石家庄050043 石家庄铁道大学机械工程学院石家庄050043

针对工程实际中状态监测下的具体机械部件在特定运行环境中发生故障的原因及类型具有典型性,在分析快速谱峭图算法的基础上,提出了典型快速谱峭图算法。该算法借鉴快速谱峭图算法分层和选取中心频率的思想,以典型故障的三倍特征频率为带... 详细信息

针对工程实际中状态监测下的具体机械部件在特定运行环境中发生故障的原因及类型具有典型性,在分析快速谱峭图算法的基础上,提出了典型快速谱峭图算法。该算法借鉴快速谱峭图算法分层和选取中心频率的思想,以典型故障的三倍特征频率为带宽,快速定位谱峭度最大的频率区间,并将该算法应用于共振解调技术滤波器参数的确定。为了验证该算法的有效性,在滚动轴承故障诊断试验台上进行了振动测试,采用基于典型快速谱峭图算法的共振解调技术进行故障诊断和类型识别。结果表明,基于典型快速谱峭图算法的共振解调技术能够较好的诊断典型故障,具有一定的工程应用价值。

关键词：典型快速谱峭图算法故障诊断滚动轴承共振解调