Satellite-to-Satellite tricking (SST) data can be used to determine the orbits of spacecraft in two ways. One is combined orbit determination, which combines SST data with ground-based tracking data and exploits the ...Satellite-to-Satellite tricking (SST) data can be used to determine the orbits of spacecraft in two ways. One is combined orbit determination, which combines SST data with ground-based tracking data and exploits the enhanced tracking geometry. The other is the autonomous orbit determination, which uses only SST. The latter only fits some particular circumstances since it suffers the rank defect problem in other circumstances. The proof of this statement is presented. The nature of the problem is also investigated in order to find an effective solution. Several. methods of solution are discussed. The feasibility of the methods is demonstrated by their application to a simulation.展开更多
The electrochemiluminescence (ECL) of luminol in aqueous alkaline solution was studied. Trace amounts of chloride showed significant effect on the efficiency of light emission of luminol as a posi- tive trigonometrica...The electrochemiluminescence (ECL) of luminol in aqueous alkaline solution was studied. Trace amounts of chloride showed significant effect on the efficiency of light emission of luminol as a posi- tive trigonometrical wave pulse was exerted on the solution. The detection limit for the chloride is 5.0 ×10^(-6) mol/L and the linear calibration range extends up to 1.0 ×10^(-2) mol/L; the relative standard deviation for 1.0 ×10^(-5) mol / L chloride is 5%. The influencing factors for chloride determination are also discussed. The possible mechanism for the electrochemiluminescence reaction may be due to the oxidation of chloride ion in the solution to ClO^-, and the latter acts on luminol and then gives out luminescence. The method has been applied to determine the total chloride in tap water with satisfactory results.展开更多
The article adopts the quarterly data of the monetary and macroeconomics variables from 1978～1999, applies the asymmetrical information game analysis, the regression and cointegration error-correction model, to inves...The article adopts the quarterly data of the monetary and macroeconomics variables from 1978～1999, applies the asymmetrical information game analysis, the regression and cointegration error-correction model, to investigate on the decision-making mechanism of money supply and money regulation project. It suggests the regulation process which central bank controls with instruments of the monetary policy and the mode detail of its operation.展开更多
文摘Satellite-to-Satellite tricking (SST) data can be used to determine the orbits of spacecraft in two ways. One is combined orbit determination, which combines SST data with ground-based tracking data and exploits the enhanced tracking geometry. The other is the autonomous orbit determination, which uses only SST. The latter only fits some particular circumstances since it suffers the rank defect problem in other circumstances. The proof of this statement is presented. The nature of the problem is also investigated in order to find an effective solution. Several. methods of solution are discussed. The feasibility of the methods is demonstrated by their application to a simulation.
基金the National Natural Science Foundation of China.
文摘The electrochemiluminescence (ECL) of luminol in aqueous alkaline solution was studied. Trace amounts of chloride showed significant effect on the efficiency of light emission of luminol as a posi- tive trigonometrical wave pulse was exerted on the solution. The detection limit for the chloride is 5.0 ×10^(-6) mol/L and the linear calibration range extends up to 1.0 ×10^(-2) mol/L; the relative standard deviation for 1.0 ×10^(-5) mol / L chloride is 5%. The influencing factors for chloride determination are also discussed. The possible mechanism for the electrochemiluminescence reaction may be due to the oxidation of chloride ion in the solution to ClO^-, and the latter acts on luminol and then gives out luminescence. The method has been applied to determine the total chloride in tap water with satisfactory results.
基金This work is supported by National Natural Science Foundation of China (No.70 12 10 0 1)
文摘The article adopts the quarterly data of the monetary and macroeconomics variables from 1978～1999, applies the asymmetrical information game analysis, the regression and cointegration error-correction model, to investigate on the decision-making mechanism of money supply and money regulation project. It suggests the regulation process which central bank controls with instruments of the monetary policy and the mode detail of its operation.
