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扩宽OMA-Ⅵ同时谱宽的新方法
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作者 杨家禾 赵祥好 林理忠 《光谱实验室》 CAS CSCD 1998年第2期6-9,共4页
OMA-Ⅵ存在同时谱宽窄的缺点。本文用一种新方法大幅度地扩宽了它的同时谱宽,且不降低其系统分辨率。应用效果甚佳。
关键词 多层光栅多色仪 同时谱 OMA-Ⅵ光学多道分析仪 分析仪器
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准分子激光激发的快速光谱分析
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作者 杨灿珠 文小明 林理忠 《光谱学与光谱分析》 SCIE EI CAS CSCD 北大核心 1998年第4期437-439,共3页
本文介绍了采用准分子激光作为激发源,结合光学多道分析仪(OMA)的并行检测及同时谱扩展技术[1],自编数据采集软件,对中低合金钢样进行采谱并给出150nm同时谱采集结果。
关键词 准分子激光 OMA 同时谱 合金钢 快速光 分析
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简易OMA系统作钢样光谱快速定性分析 被引量:2
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作者 杨灿珠 林宇 +2 位作者 徐慧 文小明 林理忠 《光谱学与光谱分析》 SCIE EI CAS CSCD 北大核心 1997年第5期94-97,共4页
本文介绍了用一维CCD摄象头、多色仪及微机组成的光学多道分析仪系统(简称OMA),研究了该系统作光谱化学分析的可行性。自编软件完成波长校正和谱线查找后,自动报出定性和半定量分析结果。
关键词 OMA 同时谱 定性分析 钢样 定性分析
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电感耦合等离子体原子发射光谱法测定铈矿中微量的砷、锑 被引量:10
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作者 陈景文 曹淑红 杨春生 《分析试验室》 CAS CSCD 北大核心 2002年第6期85-86,共2页
采用过氧化钠熔融试样 ,用盐酸调节试液酸度 ,对电感耦合等离子体原子发射光谱 (ICP AES)法同时测定铈矿中微量砷和锑进行了研究 ,考察了铈基体及共存元素 。
关键词 测定 电感耦合等离子体原子发射光 铈矿 痕量分析
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光谱学与光谱技术
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《中国光学》 EI CAS 1999年第2期15-16,共2页
O433 99020799扩宽OMA—Ⅵ同时谱宽的新方法=A new methodto broaden simultaneous spectra for OMA—Ⅵsystem[刊,中]/杨家禾,赵祥好,林理忠(云南大学物理系.云南,昆明(650091))//光谱实验室.—1998,15(2).—6-9OMA—Ⅵ存在同时谱宽窄... O433 99020799扩宽OMA—Ⅵ同时谱宽的新方法=A new methodto broaden simultaneous spectra for OMA—Ⅵsystem[刊,中]/杨家禾,赵祥好,林理忠(云南大学物理系.云南,昆明(650091))//光谱实验室.—1998,15(2).—6-9OMA—Ⅵ存在同时谱宽窄的缺点.该文用一种新方法大幅度地扩宽了它的同时谱宽,且不降低其系统分辨率。应用效果甚佳。图2表1(吴淑珍)O433.1 99020800现场光谱技术=In-situ spectroscopic technique[刊,中]/张存洲,朱箭,李加,吴彬,徐晓轩,张光寅(南开大学物理科学学院.天津(300071)) 展开更多
关键词 同时谱 技术 新方法 应用效果 激光腔内吸收光 实验室 物理科学 物理系 云南大学 南开大学
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光谱与光谱理论
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《中国光学》 EI CAS 1996年第3期11-11,共1页
O433.5 96031468二维Hubbard模型光电导谱的研究=Study ofphotoconductive spectra of two-dimensionalHubbard model[刊,中]/陈锋,应和平,李文铸(浙江大学物理系.浙江,杭州(310027))//低温物理学报.-1995,17(4).-313-317用巨正则量子... O433.5 96031468二维Hubbard模型光电导谱的研究=Study ofphotoconductive spectra of two-dimensionalHubbard model[刊,中]/陈锋,应和平,李文铸(浙江大学物理系.浙江,杭州(310027))//低温物理学报.-1995,17(4).-313-317用巨正则量子蒙特卡洛和最大熵方法研究了二维正方格点上Hubbard模型光电导谱。在半满条件下,光电导谱呈现一能隙区。掺杂后,光电导谱在w=0处出现Drude峰,在能隙区出现一新峰。 展开更多
关键词 光电导 低温物理学 蒙特卡洛 方法研究 同时谱 能隙 巨正则 模型 浙江大学 苯乙烯等离子体
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激光光谱学
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《中国光学》 EI CAS 2000年第1期20-20,共1页
O433.54 2000010121准分子激光激发的快速光谱分析=Research oneximer laser excited fast speed spectrochemicalanalysis[刊,中]/杨灿珠,文小明,林理忠(云南大学物理系.云南,昆明(650091))//光谱学与光谱分析.—1998,18(4).—437-439... O433.54 2000010121准分子激光激发的快速光谱分析=Research oneximer laser excited fast speed spectrochemicalanalysis[刊,中]/杨灿珠,文小明,林理忠(云南大学物理系.云南,昆明(650091))//光谱学与光谱分析.—1998,18(4).—437-439介绍了采用准分子激光作为激发源,结合光学多通道分析仪的并行检测及同时谱扩展技术,自编数据采集软件,对中低合金钢样进行采谱并给出150 展开更多
关键词 分析 同时谱 光学多通道分析仪 准分子激光 共振喇曼光 激光激发原子荧光光 半导体激光器 中低合金钢 激光光 并行检测
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Reagent optimization for on-line simultaneous polarographic determination of trace amounts of Cu^(2+), Cd^(2+) and Co^(2+) in the presence of anextremely large excess of Zn^(2+) 被引量:4
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作者 WANG Guo-wei YANG Chun-hua +2 位作者 ZHU Hong-qiu LI Yong-gang GUI Wei-hua 《Journal of Central South University》 SCIE EI CAS CSCD 2016年第9期2199-2204,共6页
Reagents are optimized for the simultaneous determination of trace amounts of Cu^(2+), Cd^(2+) and Co^(2+) in zinc sulfate solution, which contains an extremely large excess of Zn^(2+). First, the reagents and their d... Reagents are optimized for the simultaneous determination of trace amounts of Cu^(2+), Cd^(2+) and Co^(2+) in zinc sulfate solution, which contains an extremely large excess of Zn^(2+). First, the reagents and their doses for the experiment are selected according to the characteristics of the zinc sulfate solution. Then, the reagent doses are optimized by analyzing the influence of reagent dose on the polarographic parameters(i.e. half-wave potential E_(1/2) and limiting diffusion current I_p). Finally, the optimization results are verified by simultaneously determining trace amounts of Cu^(2+), Cd^(2+) and Co^(2+) in the presence of an extremely large excess of Zn^(2+). The determination results indicate that the optimized reagents exhibit wide linearity, low detection limits, high accuracy and good precision for the simultaneous determination of trace amounts of Cu^(2+), Cd^(2+) and Co^(2+) in the presence of an extremely large excess of Zn^(2+). 展开更多
关键词 on-line simultaneous determination trace polymetallic ions reagent optimization high concentration ratio
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Identification of Volatile Compounds in Codfish(Gadus) by a Combination of Two Extraction Methods Coupled with GC-MS Analysis 被引量:5
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作者 CHANG Yufei HOU Hu LI Bafang 《Journal of Ocean University of China》 SCIE CAS 2016年第3期509-514,共6页
Codfish is a kind of abyssal fish species with a great value in food industry. However, the flavor of codfish, especially the unpleasant odor, has caused serious problems in its processing. To accurately identify the ... Codfish is a kind of abyssal fish species with a great value in food industry. However, the flavor of codfish, especially the unpleasant odor, has caused serious problems in its processing. To accurately identify the volatile compounds in codfish, a combination of solid phase micro-extraction(SPME) method and simultaneous distillation extraction(SDE) method was used to extract the volatiles. Gas chromatography-mass spectrometry(GC-MS) along with Kovats indices(KI) and authentic standard compounds were used to identify the volatiles. The results showed that a total of 86 volatile compounds were identified in codfish, of them 24 were extracted by SDE, 69 compounds by SPME, and 10 compounds by both SDE and SPME. Seventy volatile compounds were found to have specific odors, of them 7 typical compounds contributed significantly to the flavor of codfish. Alcohols(i.e.,(E)-2-penten-1-ol and 2-octanol), esters(i.e., ethyl butyrate and methyl geranate), aldehydes(i.e., 2-dodecenal and pentadecanal) contributed the most to fresh flavor while nitrogen compounds, sulphur compounds, furans, as well as some ketones(i.e., 2-hydroxy-3-pentanone) brought unpleasant odor, such as fishy and earthy odor. It was indicated that the combination of multiple extraction methods and GC-MS analysis can enhance the accuracy of identification, and provide a reference for the further study on flavor of aquatic products. 展开更多
关键词 codfish volatile flavor compound SDE SPME GC-MS Kovats index
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Time-resolved two-photon excitation fluorescence spectroscopy and microscopy using a high repetition rate streak camera 被引量:1
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作者 LIU Li-xin QU Ju-le LIN Zi-yang WANG Lei FU Zhe GUO Bao-ping NIU Han-ben 《Optoelectronics Letters》 EI 2007年第2期157-160,共4页
We present a time-resolved two-photon excitation fluorescence spectroscopy and a simultaneous time- and spectrum- resolved multifocal multiphoton microscopy system that is based on a high repetition rate picosecond st... We present a time-resolved two-photon excitation fluorescence spectroscopy and a simultaneous time- and spectrum- resolved multifocal multiphoton microscopy system that is based on a high repetition rate picosecond streak camera for providing time- and spectrum- resolved measurement and imaging in biomedicine. The performance of the system is tested and characterized by the fluorescence spectrum and lifetime analysis of several standard fluorescent dyes and their mixtures. Spectrum-resolved fluorescence lifetime images of fluorescence beads are obtained. Potential applications of the system include clinical diagnostics and cell biology etc. 展开更多
关键词 时间分辨双光子激发荧光光 显微镜 高重复率皮秒超高速扫描照相机 时间-光分辨同时测量 生物医学
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Simultaneous Determination of Ceftazidime and Tazobactam in Injectable Powder by Reversed-Phase High Performance Liquid Chromatography 被引量:2
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作者 孟湘明 孟志云 +1 位作者 张亮 窦桂芳 《Journal of Chinese Pharmaceutical Sciences》 CAS 2004年第4期267-270,共4页
A reversed-phase high performance liquid chromatographic (RP-HPLC) method wasdeveloped and validated for the simultaneous deteimination of ceftazidime and tazobactam ininject-able powder. Methods Chromatography was ca... A reversed-phase high performance liquid chromatographic (RP-HPLC) method wasdeveloped and validated for the simultaneous deteimination of ceftazidime and tazobactam ininject-able powder. Methods Chromatography was carried out on Zorbax 300SB-C_(18) column using amixture of methanol and aqueous solution of phosphate buffer (pH = 5.6) as mobile phase. The UVdetection wavelength was 220 run. Results The linear ranges of ceftazidime and tazobactam were 0.62- 631.8 μg·mL^(-1) and 0.66 - 677.50 μg·mL^(-1), respectively. The average recoveries were 98.8%- 101.4% for ceftazidime, and 99,1% - 100.2% for tazobactam. The RSD values of inter-day andintra-day assays were lower than 1.5% for ceftazidime and 2.6% for tazobactam. Conclusion Thismethod is reproducible, simple, precise, and rapid for the quality control of ceftazidime andtazobactam in injectable powder. 展开更多
关键词 CEFTAZIDIME TAZOBACTAM RP-HPLC
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Simultaneous Determination of Saponins in Radix Glycyrrhizae, Notoginseng and Ginseng by High Performance Liquid Chromatography 被引量:7
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作者 张立国 方聪颖 +1 位作者 欧阳霄雯 倪力军 《Transactions of Tianjin University》 EI CAS 2013年第6期430-435,共6页
To establish a method for determining five saponins(notoginsenoside R1, ginsenoside Rg1, ginsenoside Re, ginsenoside Rb1 and ammonium glycyrrhizinate) in Glycyrrhizae, Notoginseng and Ginseng, the high performance liq... To establish a method for determining five saponins(notoginsenoside R1, ginsenoside Rg1, ginsenoside Re, ginsenoside Rb1 and ammonium glycyrrhizinate) in Glycyrrhizae, Notoginseng and Ginseng, the high performance liquid chromatography with diode array detector(HPLC-DAD) method was applied to an Inertsil ODS-SP column(4.6 mm×250 mm, 5 μm) with a mobile phase consisting of acetonitrile-0.05% phosphoric acid in a gradient elution manner. The flow rate was 1.0 mL/min. The column temperature was 30 ℃ and the detection wavelengths were 203 nm and 237 nm, respectively. The linear ranges were 0.700,0—7.000,0 μg for R1(r=1.000,0), 0.751,1— 7.511,4 μg for Rg1(r=1.000,0), 0.677,2—6.771,6 μg for Re(r=1.000,0), 0.733,9—7.339,1 μg for Rb1(r= 1.000,0), and 0.540,0—5.399,8 μg for ammonium glycyrrhizinate(r=0.999,9), respectively. In addition, their average recoveries were 100.28%, 105.83%, 104.09%, 99.36% and 98.54%, respectively. The relative standard deviations(RSDs) of precision, reproducibility and recovery were all less than 1.5%. The results indicate that the method is simple, accurate and reproducible so that it can be used for the simultaneous determination of the five saponins in Chinese patent medicines containing the three kinds of herbs. 展开更多
关键词 high performance liquid chromatography diode array detector Radix Glycyrrhizae Radix Notoginseng Radix Ginseng saponin
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Simulating Long Waves in a Coifs Harbour 3D Physical Model Using Short Wave Spectra
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作者 Indra FW Jayewardene, Ed Couriel +2 位作者 Oliver Light Mark Kulmar Malcolm Robertson 《Journal of Shipping and Ocean Engineering》 2016年第1期15-21,共7页
This paper presents examples of field data of extreme seiche waves measured at Coffs Harbour by MHL and describes the generation and measuring methodology to detect and reduce seiche agitation in the Coifs Harbour boa... This paper presents examples of field data of extreme seiche waves measured at Coffs Harbour by MHL and describes the generation and measuring methodology to detect and reduce seiche agitation in the Coifs Harbour boat ramp using a 3D physical model. The paper also discusses the techniques in investigating a short wave problem of stability in the same model where a long wave is simulated. Waves offshore of Coffs Harbour at 80 m depth have been recorded by MHL for a period of over 30 years. Long waves have been simultaneously measured in the harbour over a period of a decade. These data enabled the model to be verified on two dates (4/6/12, 5/9/14) when high long waves were recorded at the boat ramp harbour under storm and non-storm conditions. Long waves are generated in harbours due to group bounded long wave and surf beat or edge waves. The paper presents methodologies of generating long waves both numerically and by using physical models, and discusses the advantages and disadvantages of these generation techniques. Numerical modelling carried out using long period regular waves in a previous investigation predicted reductions up to 50% due to change of planform of the boat ramp harbour where an area next to the boat ramp was excavated and roughness elements introduced to dampen long periods. The 3D physical model simulated a 25% decrease in the long wave energy in the boat ramp when a suitable change in the planform was made. A 3D undistorted model of scale 1:58 was used in the investigation. 展开更多
关键词 SEICHE group bounded long waves surf beat planform.
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A novel spectrum borrowing scheme in integrated 3G/WLAN networks
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作者 李希金 Ji Hong Zhang Lin 《High Technology Letters》 EI CAS 2012年第2期155-159,共5页
In the heterogeneous wireless networks of the next generation, a large number of different radio access technologies will be integrated into a common network. This paper considers optimizing the utilization of spectru... In the heterogeneous wireless networks of the next generation, a large number of different radio access technologies will be integrated into a common network. This paper considers optimizing the utilization of spectrum resource in heterogeneous environment consisting two different networks: wireless local area network (WLAN) and time division-synchronous code division multiple access (TD-SCDMA) network. An optimal joint spectrum borrowing scheme maximizing overall network revenue is proposed with quality of service (QoS) constraints over both the WLAN and the TD-SCDMA cellular networks. Simulation results illustrate that system revenue earned in the proposed joint spectrum borrowing scheme is significantly larger than the case when individual networks are optimized independently. 展开更多
关键词 heterogeneous wireless network integrated network spectrum borrowing
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Chromatographic fingerprint analysis and quantitative evaluate the rhizomes of Alpinia officinarum Hance(lesser galangal) 被引量:3
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作者 Haoyan Jiao Shengmei Xu +2 位作者 Chunlin Fan Qingwen Zhang Ying Wang 《Journal of Chinese Pharmaceutical Sciences》 CAS CSCD 2019年第10期728-738,共11页
The rhizome of Alpinia officinarum Hance is a well-known traditional Chinese medicine(TCM)and has been widely used for the remedy of gastrointestinal diseases.In the present study,a simple and rapid HPLC-DAD was devel... The rhizome of Alpinia officinarum Hance is a well-known traditional Chinese medicine(TCM)and has been widely used for the remedy of gastrointestinal diseases.In the present study,a simple and rapid HPLC-DAD was developed for the quality control of the rhizomes of A.officinarum.Its chemical fingerprint was established using raw material of 15 different origins in China.Similarity analysis(SA)and hierarchical clusting analysis(HCA)were applied to select the qualitative markers.Principal components analysis(PCA)was conducted to select the quantitative markers of the rhizomes of A.officinarum samples from different origins.The constituents were confirmed by(+)electrospray ionization LC-MS.12 constituents were selected as common peaks and 10 of them were confirmed by(+)electrospray ionization LC-MS.Six bioactive constituents including DPHA,galangin flavanone,galangin,galangin 3-methylether,DPHB and DPHC were simultaneous determination by using the HPLC-DAD analysis.The developed method was able to determine the bioactive components with excellent resolution,precision and recovery.The results indicated that chromatographic fingerprint combination with multi-components determination method is suitable for quality assessment of the rhizomes of A.officinarum. 展开更多
关键词 Alpinia officinarum Hance Simultaneous determination Chromatographic fingerprint Quality evaluation Traditional Chinese medicine
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Chemometrics-assisted excitation-emission fluorescence spectroscopy for simultaneous determination of ethoxyquin and tert-butylhydroquinone in biological fluid samples 被引量:2
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作者 CHEN Yao WU HaiLong +4 位作者 WANG JianYao ZHANG XiaoHua LI Yong ZHANG ShuRong YU Ru-Qin 《Science China Chemistry》 SCIE EI CAS 2013年第5期664-671,共8页
A novel method applying simple, rapid, effective and inexpensive excitation-emission matrix (EEM) fluorescence spectroscopy coupled with second-order calibration method for simultaneous determination of ethoxyquin ... A novel method applying simple, rapid, effective and inexpensive excitation-emission matrix (EEM) fluorescence spectroscopy coupled with second-order calibration method for simultaneous determination of ethoxyquin (EQ) and tert-butylhydroquinone (TBHQ) contents in biological fluid samples was developed. After a simple data preprocessing that was to insert zeros below the first-order Rayleigh scattering, the second-order calibration method based on the alternating normalization-weighed error (ANWE) algorithm was used to deal with EEM data. Via the introduced "second-order advantage", the individual con- centrations of the analytes of interest could be obtained even in the presence of uncalibrated interferences. The experimental concentration ranges for the analytes were as follows: EQ, from 4.58 to 20.6 p.g mL-1 in plasma and from 6.87 to 20.6 gg mL-1 in urine; TBHQ, from 4.49 to 20.2 ~tg mL-1 in plasma and from 6.73 to 22.4 I.tg mL-l in urine. The recoveries from spiked bi- ological fluid samples were in the ranges of 92.8%-106.2% for EQ and 94.6%-107.2% for TBHQ. These results demonstrate that the three-dimensional EEM fluorescence with second-order calibration method is a powerful tool for obtaining both EQ and TBHQ quantitative results in plasma and urine samples, and could be applied to more complex matrices. 展开更多
关键词 ethoxyquin TERT-BUTYLHYDROQUINONE biological fluid samples fluorescence alternating normalization-weighed error
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HPLC-DAD data coupled with second-order calibration method applied to food analysis: Simultaneous determination of six benzoylurea insecticides in various fruit samples by selecting time region of chromatogram 被引量:2
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作者 QING XiangDong WU HaiLong +5 位作者 NIE ChongChong LI Yong YAN XiuFang ZHANG XiHua YIN XiaoLi YU RuQin 《Science China Chemistry》 SCIE EI CAS 2013年第11期1641-1650,共10页
This work presents a novel application of second-order calibration based on self-weighted alternating trilinear decomposition(SWATLD)algorithm for analyzing the HPLC-DAD data.The proposed method makes it possible to s... This work presents a novel application of second-order calibration based on self-weighted alternating trilinear decomposition(SWATLD)algorithm for analyzing the HPLC-DAD data.The proposed method makes it possible to simultaneously determine teflubenzuron,hexaflumuron,flufenoxuron,chlorfluazuron,diflubenzuron and benzoylurea in different fruit samples,i.e.pear,apple and banana,in the selected time region of chromatogram.The concentration,elution time and spectral information of these benzoylurea insecticides are selectively extracted from complex matrices even in the presence of unknown interferences.The root-mean-square error of prediction(RMSEP)and figures of merit,including sensitivity(SEN),selectivity(SEL)and limit of detection(LOD)are employed to access the performance of the method.The LODs obtained for these insecticides are within the range 0.017–0.26 ppm in pears,0.039–0.33 ppm in apples,0.041–0.44 ppm in bananas,respectively.Such a chemometrics-based protocol holds great potential to be extended as a promising alternative for more practical applications in food safety and quality monitoring. 展开更多
关键词 second-order calibration HPLC-DAD SWATLD benzoylurea insecticide FRUIT
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All fiber sensor based on Mach-Zehnder interferometer for simultaneous measurement of temperature and refractive index 被引量:4
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作者 曹晔 赵晨 童峥嵘 《Optoelectronics Letters》 EI 2015年第6期438-443,共6页
In this paper, we propose and experimentally demonstrate a compact optical fiber sensor based on a Mach-Zehnder in- terferometer (MZI) cascaded with fiber Bragg grating (FBG) for simultaneous measurement of refrac... In this paper, we propose and experimentally demonstrate a compact optical fiber sensor based on a Mach-Zehnder in- terferometer (MZI) cascaded with fiber Bragg grating (FBG) for simultaneous measurement of refractive index (RI) and temperature. In order to get a proper spectrum, we discuss the effects of different structure parameters of MZI. Using the resonant wavelength of the FBG (DipFBG) and the interference dip of the MZI (Dipl), the RI and tempera- ture of the surrounding medium can be determined. The sensor has good operation linearity. The experimental results show that the distinctive spectral sensitivities are 0.071 75 nm/℃and -91.766 67 nm/RIU (refraction index unit) for Dip1 and 0.009 09 nm/℃ for DipFBG. 展开更多
关键词 光纤传感器 测量温度 折射率 干涉仪 MACH 布拉格光纤光栅 灵敏度 同时测量
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Simultaneous determination of brilliant blue and indigotine by derivative fluorescence spectrometry combined with WT-RBFNN 被引量:1
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作者 马超群 陈国庆 +3 位作者 高淑梅 陈超 史院平 谷玲 《Optoelectronics Letters》 EI 2011年第2期158-160,共3页
The mixed solutions of brilliant blue and indigotine are prepared and the fluorescence spectra of them are experimentally measured. The serious overlapping spectra of brilliant blue and indigotine are solved by means ... The mixed solutions of brilliant blue and indigotine are prepared and the fluorescence spectra of them are experimentally measured. The serious overlapping spectra of brilliant blue and indigotine are solved by means of the first-derivative fluorescence spectrometry. The wavelet coefficients, obtained by compressing the spectral data using wavelet transformation (WT), are taken as inputs to establish the radial basis function neural network (RBFNN). The neural network model can realize simultaneous determination of brilliant bFue and indigotine, and the mean relative errors of both compounds are 1.84% and 1.26%, respectively 展开更多
关键词 Data compression FLUORESCENCE Fluorescence spectroscopy METADATA Radial basis function networks SPECTROMETRY Wavelet transforms
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