This letter explores the distributed multisensor dynamic system, which has uniform sampling velocity and asynchronous sampling data for different sensors, and puts forward a new gradation fusion algorithm of multisens...This letter explores the distributed multisensor dynamic system, which has uniform sampling velocity and asynchronous sampling data for different sensors, and puts forward a new gradation fusion algorithm of multisensor dynamic system. As the total forecasted increment value between the two adjacent moments is the forecasted estimate value of the corresponding state increment in the fusion center, the new algorithm models the state and the forecasted estimate value of every moment. Kalman filter and all measurements arriving sequentially in the fusion period are employed to update the evaluation of target state step by step, on the condition that the system has obtained the target state evaluation that is based on the overall information in the previous fusion period. Accordingly, in the present period, the fusion evaluation of the target state at each sampling point on the basis of the overall information can be obtained. This letter elaborates the form of this new algorithm. Computer simulation demonstrates that this new algorithm owns greater precision in estimating target state than the present asynchronous fusion algorithm calibrated in time does.展开更多
Transmission performance of electroabsorption modulator in 10 Gb/s transmission systems has been simulated and analyzed under the condition of taking into account the chirp,extinction ratio, transmissivity and rise/fa...Transmission performance of electroabsorption modulator in 10 Gb/s transmission systems has been simulated and analyzed under the condition of taking into account the chirp,extinction ratio, transmissivity and rise/fall time.Results show that short transmission distance without EDFA after EAM can be used in future metropolitan area network,but the transmissivity must be carefully considered. The sampling time range and decision level can be optimized to reduce the bit error ratio.展开更多
This study was carried out under Cumra-Konya conditions, in 2007, for the determination of consumption of the plant nutrients from soil by black cumin plants. The soil samples were taken before sowing and after harves...This study was carried out under Cumra-Konya conditions, in 2007, for the determination of consumption of the plant nutrients from soil by black cumin plants. The soil samples were taken before sowing and after harvest from the field that was sown black cumin and determined the rate of major and minor plant nutrients. For this reason, soil samples were taken from the depth of 30 cm as 2-3 kg and analyzed. The harvested black cumin yielded approximately 1,350 kg/ha seed. The analyses made in soil samples were pH, salinity, organic matter and lime, P, K, Ca, Mg, Na, Cu, Fe, Zn and Mn. According to the results, the parcel soil has not salt problem, and is little alkaline, more limy and little humic, good for phosphorus and very rich with respect potassium before sowing. At the same time, the parcel soil samples after harvest were little saline, little alkaline, more limy, poor humic, good for phosphorus and very rich with respect potassium.展开更多
基金Supported by the National Natural Science Foundation of China (No.60434020, 60374020)International Cooperation Item of Henan (No.0446650006)Henan Outstanding Youth Science Fund (No.0312001900).
文摘This letter explores the distributed multisensor dynamic system, which has uniform sampling velocity and asynchronous sampling data for different sensors, and puts forward a new gradation fusion algorithm of multisensor dynamic system. As the total forecasted increment value between the two adjacent moments is the forecasted estimate value of the corresponding state increment in the fusion center, the new algorithm models the state and the forecasted estimate value of every moment. Kalman filter and all measurements arriving sequentially in the fusion period are employed to update the evaluation of target state step by step, on the condition that the system has obtained the target state evaluation that is based on the overall information in the previous fusion period. Accordingly, in the present period, the fusion evaluation of the target state at each sampling point on the basis of the overall information can be obtained. This letter elaborates the form of this new algorithm. Computer simulation demonstrates that this new algorithm owns greater precision in estimating target state than the present asynchronous fusion algorithm calibrated in time does.
文摘Transmission performance of electroabsorption modulator in 10 Gb/s transmission systems has been simulated and analyzed under the condition of taking into account the chirp,extinction ratio, transmissivity and rise/fall time.Results show that short transmission distance without EDFA after EAM can be used in future metropolitan area network,but the transmissivity must be carefully considered. The sampling time range and decision level can be optimized to reduce the bit error ratio.
文摘This study was carried out under Cumra-Konya conditions, in 2007, for the determination of consumption of the plant nutrients from soil by black cumin plants. The soil samples were taken before sowing and after harvest from the field that was sown black cumin and determined the rate of major and minor plant nutrients. For this reason, soil samples were taken from the depth of 30 cm as 2-3 kg and analyzed. The harvested black cumin yielded approximately 1,350 kg/ha seed. The analyses made in soil samples were pH, salinity, organic matter and lime, P, K, Ca, Mg, Na, Cu, Fe, Zn and Mn. According to the results, the parcel soil has not salt problem, and is little alkaline, more limy and little humic, good for phosphorus and very rich with respect potassium before sowing. At the same time, the parcel soil samples after harvest were little saline, little alkaline, more limy, poor humic, good for phosphorus and very rich with respect potassium.
