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Most of industrial garbage, such as mirrors, tiles and foams had strong capacity of reflectance. Invasion of Iva xanthifolia was usually accompanied with municipal industrial garbage including plenty of reflected materials. Those reflected garbage might accelerate the invasive pace. In this text, we researched how reflected light from reflected garbage effect on photosynthetic capacity of Iva xanthifolia...
In this paper, a four-channel high accurate sinusoidal signal generator to be used for the impedance measurements is presented. The whole system is constituted by the master-slave processor structure. Direct digital frequency synthesis (DDS) and the SOPC system are realized by the Nios II soft-core CPU embedded into the FPGA. The results demonstrate that the signal generator's amplitude stability...
This paper introduces a solution method for ship swaying motion differential equations—maximum likelihood parameter identification method. To evaluate its data processing effects, we have taken the real-time measurement data as a research object and computed with several algorithms, at the same time compared their prediction results. The results show that parameter identification method for differential...
In order to improve the accuracy of outer-trajectory measurement data processing, appropriate methods should be selected according to the features and demands of different missions. Based on the engineering background of space tracking ships’ multiple equipments tracking the same flying object during precision evaluation test at sea, we first propose the concept of measurement data fusion, according...
Grown-together Nd:GdVO4/GdVO4 composite crystals were presented and end-pumped by diode-laser operating at 912 nm. The maximum output power of 8.15 W was obtained, with optical conversion efficiency of 29.1% and slope efficiency of 44.2%.
A scheme of header extraction using semiconductor optical amplifier and Mach-Zehnder-Interferometer was proposed. Numerical and simulation show that more than 18dB contrast ratio could be achieved at packet rate 100Gbit/s. Parameters of the SOA-MZI and the input signal are discussed to optimize the performance of the scheme.
A all optical header extraction scheme based on semiconductor optical amplifier and Mach-Zehnder-Interferomete (SOA-MZI) with asymmetric control light was proposed and demostrated in this paper. By theoretical analsys, we found the proposed scheme can implement the optical pakcet header extraction more effectively. Numerical analsys and simulation show that more than 18dB contrast ratio of the extrcacted...
We employ the parallel, unstructured-grid, nonhydrostatic coastal ocean model SUNTANS to simulate the formation and evolution of internal gravity waves in the South China Sea, a site of some of the largest observed internal waves on Earth. The use of unstructured grids enables the simulations to capture the multiscale behavior of the waves, while the nonhydrostatic capability of the model enables...
The uncertainty source in measurement with CCC apparatus is discussed. Experiment shows that the uncertainty in operation of CCC is mainly from the pressure fluctuation of helium gas in cryostat. Some approaches of decreasing the uncertainty are proposed. In addition, increasing the turn number of the CCC windings can improve the S/N ratio in measurement and is also effective for decreasing the measurement...
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