With the increasing awareness of environmental protection, people’s concern of pollution issues arising. Vehicles, as the most important means of transportation, its exhaust emission has received considerable attenti...With the increasing awareness of environmental protection, people’s concern of pollution issues arising. Vehicles, as the most important means of transportation, its exhaust emission has received considerable attention. The catalytic converter is able to purify harmful substances in exhaust gas. The absolute content of precious metals in the catalytic converter dominates the exhaust gas purification effect. Accurate detection of precious metal content is of great significance for controlling the cost of catalysts, ensuring catalytic performance and recovering precious metals from spent catalysts. We herein summarized several instruments for precious metals content exploration, such as X-ray fluorescence spectrometer (XRF), atomic absorption spectrometer (AAS), inductively coupled plasma emission spectrometer (ICP) and spectrophotometer. In this thesis, the feasibility of using various devices for characterizing precious metal content in catalytic converters is analyzed and their strengths or weaknesses are elaborated.展开更多
This standard specifies the method summary, reagents, apparatus, sampling, procedure, test results calculation and permissible tolerance of the determination of magnesium oxide by CyDTA volumetric method.
A factorial mating design in two environments was conducted using 7 cytoplasmic male sterile lines(A)and 5 restorer lines(R)along with their F1(A×R)and F2 populations.The unconditional and conditional analyses of...A factorial mating design in two environments was conducted using 7 cytoplasmic male sterile lines(A)and 5 restorer lines(R)along with their F1(A×R)and F2 populations.The unconditional and conditional analyses of genetic models and the corresponding statistic methods,including endospermic,cytoplasmic,and maternal plant genetic systems,were used to analyze the genetic relationships between protein content(PC)and the appearance quality traits of indica rice(Oryza sativa L.).The results from unconditional analysis indicated that PC was significantly correlated with the appearance quality traits of rice,except for the brown rice thickness(BRT).Only the genetic covariance between PC and the brown rice width(BRW)was positively correlative,whereas all the other pairwise traits were negatively correlative.The results from conditional analysis revealed that the weight of brown rice(WBR)or the amylose content(AC)could significantly affect the relationships between PC and the appearance quality traits of indica rice.The conditional analysis showed that WBR might negatively affect the relationships between PC and the brown rice length(BRL),BRW,or BRT through the geuotype x environmental(GE)interaction effects,but positively affected the relationships between PC and the ratio of brown rice length to width(RLW)or the ratio of brown rice length to thickness(RLT).The amylase content could positively affect the relationships between PC and BRL,RLW,RLT through the cytoplasmic effects and maternal additive effects,but negatively affected the relationships between PC and BRW.展开更多
We apply a new statistical analysis technique, the Mean Field approach to Independent Component Analysis（MF-ICA） in a Bayseian framework, to galaxy spectral analysis. This algorithm can compress a stellar spectral l...We apply a new statistical analysis technique, the Mean Field approach to Independent Component Analysis（MF-ICA） in a Bayseian framework, to galaxy spectral analysis. This algorithm can compress a stellar spectral library into a few Independent Components（ICs）, and the galaxy spectrum can be reconstructed by these ICs. Compared to other algorithms which decompose a galaxy spectrum into a combination of several simple stellar populations, the MF-ICA approach offers a large improvement in efficiency. To check the reliability of this spectral analysis method, three different methods are used：（1） parameter recovery for simulated galaxies,（2） comparison with parameters estimated by other methods, and（3） consistency test of parameters derived with galaxies from the Sloan Digital Sky Survey. We find that our MF-ICA method can not only fit the observed galaxy spectra efficiently, but can also accurately recover the physical parameters of galaxies. We also apply our spectral analysis method to the DEEP2 spectroscopic data, and find it can provide excellent fitting results for low signal-to-noise spectra.展开更多
This paper classifies the anti-tumor traditional Chinese medicine's fluorescence analysis and finds that its research content mainly includes two aspects:the application of fluorescence analysis in the determinati...This paper classifies the anti-tumor traditional Chinese medicine's fluorescence analysis and finds that its research content mainly includes two aspects:the application of fluorescence analysis in the determination of the effective component content of anti-tumor traditional Chinese medicine;the study of the combined use of fluorescence imaging technology and the drug.According to literature analysis,it is found that although the research on the fluorescence analysis of anti-tumor Chinese medicine components is in a good state of development,it still needs to explore further in the identification of unknown components and deeper research on known components.Therefore,it can provide a certain basis for clinical guidance of tumor patients.展开更多
In this paper, the authors investigated the feasibility of near-infrared to measure sugar at cotton fibre. The simple regression equations are generated by respectively correlating thc absorption data(by using 1640nm ...In this paper, the authors investigated the feasibility of near-infrared to measure sugar at cotton fibre. The simple regression equations are generated by respectively correlating thc absorption data(by using 1640nm and 2100nm wavelengths) with sugar( glucose, fructose and sucrose) and the regression modes possess a high coefficient of correlation. The differences for absorption of various sugars at some (?)velengths are diseussed.展开更多
文摘With the increasing awareness of environmental protection, people’s concern of pollution issues arising. Vehicles, as the most important means of transportation, its exhaust emission has received considerable attention. The catalytic converter is able to purify harmful substances in exhaust gas. The absolute content of precious metals in the catalytic converter dominates the exhaust gas purification effect. Accurate detection of precious metal content is of great significance for controlling the cost of catalysts, ensuring catalytic performance and recovering precious metals from spent catalysts. We herein summarized several instruments for precious metals content exploration, such as X-ray fluorescence spectrometer (XRF), atomic absorption spectrometer (AAS), inductively coupled plasma emission spectrometer (ICP) and spectrophotometer. In this thesis, the feasibility of using various devices for characterizing precious metal content in catalytic converters is analyzed and their strengths or weaknesses are elaborated.
文摘This standard specifies the method summary, reagents, apparatus, sampling, procedure, test results calculation and permissible tolerance of the determination of magnesium oxide by CyDTA volumetric method.
基金This work was supported by National Natural Science Foundation of China(No.30571198)the Science and Technology Office of Zhejiang Province(No.2004C2020-2 and No.011102471).
文摘A factorial mating design in two environments was conducted using 7 cytoplasmic male sterile lines(A)and 5 restorer lines(R)along with their F1(A×R)and F2 populations.The unconditional and conditional analyses of genetic models and the corresponding statistic methods,including endospermic,cytoplasmic,and maternal plant genetic systems,were used to analyze the genetic relationships between protein content(PC)and the appearance quality traits of indica rice(Oryza sativa L.).The results from unconditional analysis indicated that PC was significantly correlated with the appearance quality traits of rice,except for the brown rice thickness(BRT).Only the genetic covariance between PC and the brown rice width(BRW)was positively correlative,whereas all the other pairwise traits were negatively correlative.The results from conditional analysis revealed that the weight of brown rice(WBR)or the amylose content(AC)could significantly affect the relationships between PC and the appearance quality traits of indica rice.The conditional analysis showed that WBR might negatively affect the relationships between PC and the brown rice length(BRL),BRW,or BRT through the geuotype x environmental(GE)interaction effects,but positively affected the relationships between PC and the ratio of brown rice length to width(RLW)or the ratio of brown rice length to thickness(RLT).The amylase content could positively affect the relationships between PC and BRL,RLW,RLT through the cytoplasmic effects and maternal additive effects,but negatively affected the relationships between PC and BRW.
基金supported by the Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences (No. XDB09000000)the National Basic Research Program of China (973 Program) (2015CB857004)the National Natural Science Foundation of China (NSFC, Nos. 11225315, 1320101002, 11433005 and 11421303)
文摘We apply a new statistical analysis technique, the Mean Field approach to Independent Component Analysis（MF-ICA） in a Bayseian framework, to galaxy spectral analysis. This algorithm can compress a stellar spectral library into a few Independent Components（ICs）, and the galaxy spectrum can be reconstructed by these ICs. Compared to other algorithms which decompose a galaxy spectrum into a combination of several simple stellar populations, the MF-ICA approach offers a large improvement in efficiency. To check the reliability of this spectral analysis method, three different methods are used：（1） parameter recovery for simulated galaxies,（2） comparison with parameters estimated by other methods, and（3） consistency test of parameters derived with galaxies from the Sloan Digital Sky Survey. We find that our MF-ICA method can not only fit the observed galaxy spectra efficiently, but can also accurately recover the physical parameters of galaxies. We also apply our spectral analysis method to the DEEP2 spectroscopic data, and find it can provide excellent fitting results for low signal-to-noise spectra.
文摘This paper classifies the anti-tumor traditional Chinese medicine's fluorescence analysis and finds that its research content mainly includes two aspects:the application of fluorescence analysis in the determination of the effective component content of anti-tumor traditional Chinese medicine;the study of the combined use of fluorescence imaging technology and the drug.According to literature analysis,it is found that although the research on the fluorescence analysis of anti-tumor Chinese medicine components is in a good state of development,it still needs to explore further in the identification of unknown components and deeper research on known components.Therefore,it can provide a certain basis for clinical guidance of tumor patients.
文摘In this paper, the authors investigated the feasibility of near-infrared to measure sugar at cotton fibre. The simple regression equations are generated by respectively correlating thc absorption data(by using 1640nm and 2100nm wavelengths) with sugar( glucose, fructose and sucrose) and the regression modes possess a high coefficient of correlation. The differences for absorption of various sugars at some (?)velengths are diseussed.
